The new Perfecto doser for masterbatch and plastic additives

Vismec is expanding its range of dosing solutions with two new models designed for dosing masterbatches and additives: the Perfecto gravimetric doser, completely updated for maximum accuracy, and the Flex volumetric doser.

Below, we highlight their advantages in terms of precision, color management, and production continuity.

What is a masterbatch for coloring plastic granules?

A masterbatch is a concentrate of pigments or additives dispersed in a carrier polymer, that is, a carrier resin that binds them and distributes them uniformly throughout the material.

The masterbatch is dosed together with virgin plastic pellets to give the finished product the desired color. This process must be carefully controlled, as inaccurate dosing can lead to problems in subsequent processing stages and increase production costs. Below, we outline the potential issues.

• Overdosing: it can cause significant color variations and substantially increase production costs, as masterbatch is considerably more expensive than virgin polymer. 
• Underdosing: it can result in colors that differ from the required specifications, uneven color distribution, and increased production scrap, with the additional risk of line stoppages while the formulation is recalibrated. 
• Variability between batches: if dosing is not accurate and repeatable, the final color may vary from one batch to another, creating a significant quality issue in industrial production. 

What are plastic additives?

Additives are substances added in small percentages to the polymer to modify its physical, chemical, or aesthetic properties. The following are the main types of additives. 

• UV stabilizers: they protect the polymer from degradation caused by sunlight, preventing yellowing, embrittlement, and color loss.
• Antioxidants: they slow down the oxidation of the polymer during high-temperature processing and over time, helping preserve its mechanical properties and appearance. 
• Flame retardants: they reduce the flammability of the polymer by delaying ignition and slowing flame propagation. 
• Antistatic and lubricating agents: antistatic agents reduce the buildup of electrostatic charges on the polymer surface, while slip agents reduce friction, allowing the material to move more easily during processing. 
• Functional fillers: materials such as talc, fibers, or calcium carbonate that improve properties such as stiffness and mechanical strength. 

Additives require even tighter dosing control than masterbatches. Even a small variation in the amount added can cause the material to fall outside specification, leading to reduced mechanical performance or production batches with non-compliant properties that must be discarded. 

Therefore, dosing systems must be capable of delivering consistent and repeatable quantities of additives - even at very low feed rates - without material stagnation or buildup that could affect subsequent doses. 

Perfecto gravimetric feeder: high-precision additive and masterbatch dosing

The new Perfecto doser is a gravimetric doser that controls the weight of every single dose of masterbatch and additives with extreme precision.  

It is Vismec’s preferred solution whenever accuracy and repeatability are top priorities, such as when dosing expensive additives or masterbatches in recipes with tight tolerances.

Precision and dose control

At the heart of the Perfecto dosing system is its high-performance weighing system:

• C3-class load cell with a 32-bit ADC converter - for high-precision measurement of every dose.
• 38,000 samples per second - this high sampling rate allows the system to adjust the dose in real time, even at low flow rates.
• Individual correction of each dose - the decoupled mechanical system allows for adjustments to each discharge, maintaining consistent accuracy over time.

The dosing chamber is designed without any accumulation points: each granule completes its full cycle, preventing stagnation that could compromise the accuracy of the next dose.

The twin-start screw, combined with a two-stage barrel, ensures a smooth, low-pulsation flow, with flow rates up to 15 kg/h for standard masterbatch and 9 kg/h for waxy masterbatch.

The screw is mounted on a double-row ball bearing and is decoupled from the high-torque stepper motor, a feature that extends the motor’s service life and maintains responsiveness and precision over time.

Quick cleaning and color changes without downtime

Perfecto is designed to reduce the downtime typically associated with color changes. 

The discharge hopper allows residual masterbatch to be removed without disassembling the doser, while the dosing assembly features a quick-release mechanism. The front access door, equipped with a magnetic latch, can be opened even when material is present, allowing visual inspection at any time.

The stainless steel hopper and feed throat, with internal separators designed without cavities, minimize dust buildup and simplify cleaning between production runs.

Flex: the volumetric doser that can be combined with Perfecto

Alongside the Perfecto gravimetric doser, the Vismec range also includes the new Flex volumetric doser. Without a load cell, Flex meters material based on volume, making it the ideal choice for stable, repetitive formulations where a more cost-effective solution is required. 

Flex shares the same quick-release dosing mechanism as Perfecto: a d14 screw conveyor, a mixing throat, and a stainless steel hopper, along with a dedicated touchscreen interface.

The two units can be combined: the same mixing throat can accommodate up to three dosing units, so it is possible to assign the critical additive to the Perfecto gravimetric doser and the base color to the Flex volumetric doser, optimizing both precision and investment on a single line.

Gravimetric or volumetric dosing: how to choose

The choice between the two technologies depends on the application. Gravimetric dosing is recommended where absolute accuracy, consumption control, and dose traceability are required, while volumetric dosing remains effective for established recipes and production processes with less stringent requirements.

Want to choose the dosing system best suited to your production line? Contact our team for a technical consultation and tailored advice. 

by Laura Franceschi

Vismec at PLAST 2026, the Milan trade show for the plastics and rubber industry: 9- 12 June 2026, Hall 24 – Stand D112-118

From 9 to 12 June 2026 Vismec is taking part in PLAST, one of the world's leading trade shows for the plastics and rubber industry, held in Milan every three years at Fiera Milano (Rho).

Find us at Hall 24 – Stand D112-118.

Vismec at PLAST 2026: why we participate

A triennial event with a strong international reach, PLAST gathers the entire industry supply chain under one roof: from raw materials to machines, through to technologies for recovery and recycling. It is the ideal opportunity to get hands-on with the solutions reshaping the way plastic is processed.

For us, it is above all the right moment to meet customers and industry professionals in person and showcase our expertise in dehumidification, conveying and dosing of plastic granules.

At our stand we bring technologies designed for more efficient, integrated and automated processes, developed alongside those who transform plastic every day and know its real-world challenges.

Would you like to see our technologies in action and talk to our team? We look forward to seeing you at PLAST 2026, in Milan: Hall 24 – Stand D112-118.

by Laura Franceschi

Vismec at FIP 2026, the Lyon trade show for the plastics industry: 2 - 5 June 2026, Hall 5.1 - Stand N03

From 2 to 5 June 2026 Vismec is taking part in FIP – France Innovation Plasturgie, the leading French trade show dedicated to the plastics, composites and rubber industry. The event takes place in Lyon, at the Eurexpo exhibition centre.

Find us at Hall 5.1 – Stand N03.

Vismec at FIP 2026: what we focus on

Over four days, FIP brings together leading companies and players from the plastics sector, addressing the themes of innovation, technology and sustainability, with a particular focus on end markets such as transport, medical, packaging, construction and consumer goods, sectors that our company knows very well.

In a setting that puts the most advanced plastics processing solutions centre stage, Vismec once again confirms its position at the forefront of the latest developments in dehumidification, conveying and dosing of plastic granules.

In Lyon, we are presenting our solutions to make processes more efficient, integrated and automated: solutions designed to meet the real-world needs of those who work with plastic every day.

Would you like to see our technologies in action and talk to our team? We look forward to seeing you at FIP 2026, in Lyon: Hall 5.1 – Stand N03.

by Laura Franceschi

Optimization and automation: a new pellet conveying system for a leading plastic injection molding company

The subject of today’s case study is a leading company in the plastic injection molding sector, specializing in the production of molded components for the designer furniture and electronics industries.

Operating 24/7 and meeting the high-quality standards demanded by international markets, the efficiency of the processing department is critical to the company’s business.

The challenge: overcoming the inefficiency of isolated pellet transport systems

The company asked Vismec to carry out a plant overhaul to address problems and inefficiencies resulting from fragmented management of the press feed system. The main issues identified were as follows.

• Risk of contamination: increased risk of human error due to the manual transport of plastic pellets bags and the use of individual feeders mounted on the machines.
• Energy inefficiency: constant operation of many inefficient single-phase motors, with a significant impact on energy consumption.
• Frequent machine downtime: difficulty monitoring material levels due to the lack of a centralized control system, often resulting in sudden production interruptions. 
• Suboptimal space organization: due to material loading directly at the press, occupation of a significant portion of the production area by storage containers, pallets with big-bags or octabins, and dehumidifiers, hindering operator movement and creating a cluttered and poorly organized workspace. 
• High component wear: premature wear of hoses and receivers in contact with materials, caused by the use of glass-fiber-filled materials. 
• Workplace safety: risk to operators caused by the frequent passage of forklifts used to handle big bags.

The solution: a smart pneumatic conveying system

The goal of the plant overhaul was to create a fully automated centralized feeding system capable of transporting pellets from the storage area, equipped with containers, big-bag unloading stations, and dryers for pre-dehumidification of the resin, to over 20 consumption points distributed throughout the department: injection molding machines, on-machine resin dryers, and screw mixers.

The work carried out by Vismec for the overhaul and reorganization of the plant had multiple effects, as described below.

Storage and feeding

Two big-bag emptying frames were installed for raw material handling, allowing complete emptying without requiring operator intervention to reposition a suction nozzle. The frames are equipped with a minimum level sensor with an alarm, which provides advance warning when the material is running low, and the big bag needs to be replaced.

The system also includes new containers with bag-breaking grids for handling materials in 25-kg bags.

Conveying and distribution

To direct each type of granule (from storage or dryer) to the correct machine, a manual sorting unit has been installed, featuring a switching system and duct cleaning devices, which eliminates the risk of cross-contamination and material mix-ups.

The individual feeders have been replaced with two VB62 two-stage side-channel blowers, controlled by inverters: the blowers ensure optimal vacuum even over long distances (over 70 meters in this project for the presses located farther away). The inverter modulates power based on actual demand, reducing consumption, and the dual blower with automatic switching valves ensures continuous operation even if one of the two units fails. 

The distribution system, made entirely of stainless steel with VISCARB-reinforced bends, connects each press to the storage area via dedicated piping.

Filtration and quality of material

To remove dust from all molding processes, the high-efficiency Vismec DR4 dual cyclonic filter was adopted. It improves plant cleanliness by removing dust and reducing waste in all molding processes without interrupting material feed to the presses.

The line cleaning valves eliminate material buildup in the pipes at every production changeover, ensuring the effective transfer of granules from the source to the press.

New stainless steel hoppers with internal flaps reinforced with VISCARB and new volumetric master feeders connect all the presses to the system, adding the option of coloring the material directly in the press on machines that previously lacked this capability.

Control and monitoring 

The FW50 centralized control system manages all hoppers connected via a serial line, ensuring proper organization of loading queues and clear and fast communication of system operating status to operators, thanks to the additional touch panel.

The connection between the FW50 control system and the VISBUS supervisor allows for the acquisition of all operating data, enables remote management via a web server, and, through the OPC-UA protocol, interfaces with the customer’s MES (Manufacturing Execution System) software for optimal plant management in line with Industry 4.0.

The results: productivity and sustainability 

The new plant has already delivered significant benefits in its first six months:

• energy efficiency, with lower conveying costs;
• product quality, with reduced waste, thanks to the absence of contamination and dust;
• production space, with more room available around the presses for new lines and packaging systems;
• maintenance, meaning fewer interventions for filter cleaning and replacement of worn components;
• labor efficiency, with reduced manual reloading operations of individual presses;
• safety, with the elimination of forklift traffic in the production aisles.

This case study demonstrates how targeted initiatives implemented according to Industry 4.0 principles can bring significant benefits to the furniture components sector. Automating the transport of plastic pellets, in fact, means investing both in finished-product quality and in process sustainability.

Want to find out how to optimize your plastic processing department? Contact us to schedule a technical site visit and an analysis of your energy consumption.

by Laura Franceschi

Vismec plastic granule dryers and management systems worldwide: continuous innovation and efficiency

The March 2026 issue of Upgrade Magazine – Speciale Noale e dintorni (Noale and surroundings special) includes an article dedicated to Vismec, its history, and the decisions that have guided its technical, strategic, and commercial evolution.

Here on our website, we also want to retrace the path that has led us to become a leader in the development of technologies for technical polymer molding, starting with technologies for drying plastic granules: an evolution built on expertise, innovation, and the ability to best meet customer needs.

Plastic dryers: the starting point for an advanced technological approach

Vismec was born with the specific goal of developing high-tech solutions for plastic injection molding companies, starting with a central element of the process: the plastic dryer.

The role of granule dehumidifiers in the molding process

Plastic granules are, in fact, hygroscopic materials that tend to absorb moisture from the environment. Without proper treatment, the absorbed humidity compromises the quality of the finished product, causing cosmetic and structural defects. A plastic granule dryer is specifically designed to remove humidity before processing, ensuring stable and controlled conditions during molding.

From the beginning, we have focused on innovation, introducing advanced solutions in rotary desiccant dehumidifiers to improve process control and reduce energy consumption: a significant improvement in system performance that has also helped raise industry standards.

Innovation redefining process standards

The advantages of our dryers for plastic materials translate into measurable benefits for companies. Let’s see them all.

• More effective process control: accurate dehumidification of plastic granules prevents problems caused by evaporation during molding, ensuring consistent results in terms of uniformity and quality of the finished product, even in high-volume production.
• Reduced energy consumption: the optimization of drying cycles and the efficiency of rotary dehumidifiers enable excellent performance while reducing the energy required for processes.
• Lower incidence of scrap and rework: by eliminating the causes of moisture-related defects, scrap is significantly reduced, improving overall efficiency.

Our technological identity and the value of our solutions have set the standard over time, establishing themselves as the benchmark even for our competitors.

Plastic granules management systems, digitalization, and integration: the evolution of Vismec

Starting with plastic dehumidifiers, we have progressively expanded our product range, developing complete systems for plastic granule management: dosing, conveying, and control to offer a comprehensive technological solution.

From stand-alone machines to integrated systems

Today, the solutions we offer are not simply machines but systems designed for precision, modularity, and ergonomics to integrate into complex plants and existing production layouts, to operate in a coordinated manner to optimize processes, and simplify the tasks of operators.

Vismec plastic polymer management systems allow users to organize every phase, from drying to transport to dosing, with a high level of precision and repeatability. This results in greater operational efficiency and reduced maintenance requirements and downtime, features that are particularly appreciated by our customers.

VisiBus and OPC UA protocol: the connected factory

Digitalization is a key aspect of our evolution, including our most recent developments. Recently, for example, we developed VisiBus, an advanced communication system that enables machines to communicate with one another and with customers’ management systems via the OPC UA standard.

We have also trained our staff on topics related to the use of Artificial Intelligence (AI) and its applications in production processes.

Digital innovation tools allow us to:

• monitor process parameters in real time, improving operational control and the ability to intervene in case of anomalies;
• integrate machinery into corporate management systems, facilitating the collection and analysis of production data;
• optimize plant performance over time, thanks to a comprehensive, structured, and integrated view of data and information.

In this way, our systems become an integral part of an interconnected factory, focused on efficiency and performance.

An industrial model that bridges local roots and a global vision

From the very beginning, we have chosen to expand our business into international markets, building a solid presence in Europe and North America over time. Until a few years ago, innovative technologies were embraced and adopted more quickly abroad: a result that, however, requires the ability to build a solid reputation and network of relationships, while effectively adapting to different contexts.

At the same time, we have maintained a strong connection with the Veneto region: an area that offers advanced technical and manufacturing expertise across the supply chain, an asset to be valued and preserved not only as a competitive advantage, but as a source of wealth to be recognized.

This is why we also support local sports and cultural initiatives: a way to contribute to the growth of the community where our company was founded and has grown, giving back a portion of what we have received.

We have also chosen to invest in people and their skills: technical training, up-to-date know-how, and collaborations with universities and research centers. Our motivation stems from the fact that we operate in sectors where plastic polymers are used to produce high-value components in terms of performance and safety, from medical devices to electronics and telecommunications.

Do you want to improve the efficiency of your molding processes and optimize the management of plastic granules in your company? We’re here to help you develop customized solutions.

Find out how Vismec systems can support your production needs with reliable, integrated, performance-oriented technologies: contact our team.

by Laura Franceschi

How pneumatic suction conveying of plastic pellets works

Pneumatic suction conveying of plastic pellets is used in plastic processing plants to move plastic granules in an automated, controlled manner that is integrated into the production cycle.

In this in-depth analysis, we examine how pneumatic conveying works, how it differs from other technologies, and the role of the so-called Venturi principle.

How pneumatic suction conveying of plastic pellets works

In pneumatic conveying of plastic granules by suction, the material is conveyed through the conveying pipes using a vacuum generated upstream of the system.

In other words, it is not the air that pushes the pellets, but the pressure difference that draws them from the storage point to the machinery used for processing.

General principle of vacuum operation

The operating cycle is based on three stages: vacuum generation, air-material transport and final separation. A pump or turbine creates a lower pressure zone: as a result, air enters the circuit and transports the pellets along the pipe.

In the receiver unit, special filters or separation systems allow the material to be discharged into the hopper while the air is expelled. This system guarantees:

• clean handling of the pellets, reducing dispersion and waste;
• centralised management of the feeding of multiple processing machines, thanks to vacuum units that manage multiple lines simultaneously;
• control of loading cycles, using automatic systems.

Each element of the system contributes to flow stability and production continuity.

Centralised vacuum conveying

Pneumatic conveying of plastic pellets, therefore, uses a controlled air flow to move the granules in a closed circuit. In the case of suction, the vacuum can be generated on board the machine or in a shared vacuum unit, depending on the plant configuration.

Many companies adopt a centralised solution for specific reasons:

• system efficiency, with the ability to feed multiple machines from a single central unit;
• reduced risk of leaks along the line, thanks to constant vacuum;
• greater order in the production layout, with storage containers and collection points organised in a structured manner.

The centralised configurations offered in many cases by Vismec allow for optimisation of space and material handling times. Our centralised transport systems integrate vacuum units, automatic switching systems and cycle supervision into a single coherent architecture that is scalable and adaptable to future plant expansions.

How do you size a pneumatic pellet conveying system?

A frequently asked question concerns the sizing of feeding systems. The correct configuration depends on several variables:

• distance between the collection point and the processing machine, which affects pressure drops and the power required to generate stable negative pressure along the line;
• required air flow rate, to be calibrated according to the quantity of material to be transferred and the cycle times of the user machine;
• number of machines connected, a determining factor in choosing between a decentralised or centralised vacuum solution;
• type of plastic material transported, because specific weight, pellet shape and sensitivity to abrasion influence air speed and pipe diameter.

The flow speed must keep the pellets in suspension, avoiding accumulation or excessive wear. The choice of filters also affects operational continuity, especially in contexts with intensive production cycles.

With this process in mind, Vismec pneumatic transport systems can be integrated with gravimetric or volumetric dosing systems and dryers for granules, to ensure excellent material quality for machine feeding and, consequently, to promote a good final result.

The decentralised Venturi suction system in granule conveying

The Venturi suction system, on the other hand, is a technical solution used in some pneumatic pellet conveying configurations, particularly in compact or decentralised systems.

What is a Venturi vacuum conveying system?

The Venturi principle exploits the variation in speed of a fluid in a duct with a reduced cross-section. When compressed air passes through the constriction, its speed increases and the static pressure decreases. This difference generates a zone of negative pressure that draws the pellets into the transport line.

In this context, the Venturi system is used when it is necessary to feed individual machines without resorting to a centralised system, in applications with:

• short transfer distances between the pickup point and the individual processing machine;
• moderate flow rates compatible with non-continuous production cycles or limited material requirements;
• need for quick and flexible installations, i.e. in departments subject to frequent reconfigurations.

Since the Venturi system uses compressed air, energy consumption must be evaluated in relation to the required productivity. In very dynamic environments, this solution still allows the creation of dedicated lines with limited intervention on the existing layout.

Vismec solutions for pneumatic pellet conveying

Designing a pneumatic granule conveying system requires a detailed analysis of the production layout, distances, volumes transported and the desired level of automation.

Vismec designs and supplies both modular and centralised systems for the conveying of plastic granules, which can be integrated with storage containers, dehumidifiers and dosing units. The available configurations may include, among other things:

• single-phase and three-phase receivers, sized according to flow rate;
• centralised vacuum units, to feed multiple machines;
• automatic control systems, with cycle management and supervision.

We configure each system according to the customer's needs, with a focus on operational continuity, material quality, efficiency and scalability.

If you operate in injection moulding, extrusion or plastic blow moulding and want to improve your granule transport systems, contact Vismec. We will offer you a configuration tailored to your goals, your company's production layout and the required levels of automation.

by Laura Franceschi

Vismec at MECSPE 2026, the international trade fair for the manufacturing industry

From 4 to 6 March 2026, Vismec will once again take part in MECSPE, the International Trade Fair for the Manufacturing Industry. The 24th edition of the event will be held in Bologna.

Our exhibition area will be located in Hall 36 – Stand A30.

Vismec at MECSPE 2026: our strengths

The event will feature 13 thematic halls, with dedicated areas for machine tools, automation, metalworking, plastics and much more. As usual, MECSPE will also devote ample space to innovation, Industry 5.0, sustainability and digital factory technologies.

Our company continuously keeps pace with the latest innovations in drying, conveying and dosing of plastic granules.

Recently, for example, we introduced the new Perfecto doser, designed to ensure ease of use, speed and precision in processing results.

Would you like to see our technologies live?
Come and meet our team at MECSPE 2026 – Hall 36, Stand A30.

by Laura Franceschi

Vismec will take part in SAMUEXPO 2026, the trade fair dedicated to machinery and technologies for the manufacturing industry.

From 5 to 7 February 2026, Vismec will take part in SAMUEXPO 2026, the biennial international trade fair where leading manufacturers of machinery and technologies for the manufacturing industry come together.
The event, which for years has confirmed itself as a highly anticipated appointment, will once again take place in Pordenone.

Vismec will be exhibiting with its own stand: visit us and experience our technologies firsthand at Hall 1, Stand 04 B.

Vismec at SAMUEXPO 2026: our focus

The 2026 edition of SAMUEXPO will give ample space to innovation, highlighting the solutions offered by companies that stand out as particularly attentive to the latest technological developments.

Vismec has always kept pace with the most recent advances in plastic granule drying, conveying and dosing.
Recently, for example, we introduced the new Perfecto doser, designed to ensure ease of use and fast processing times, combined with the precision that has always distinguished our products.

Want to know more?
We look forward to seeing you at SAMUEXPO 2026 – Hall 1, Stand 04 B.

by Laura Franceschi

Vismec takes part in K 2025 and presents the last innovations:
Düsseldorf, Germany, 8–15 October

Vismec takes part in K – the international trade fair for innovations in the plastics and rubber industry.

The event will take place from 8 to 15 October in Düsseldorf, Germany.

It will be an opportunity to present our drying, conveying, and dosing systems for plastic granules, as well as the latest innovations we have developed.

Specifically, Vismec returns at K2025 with a real demo area showcasing the new solutions designed to make plastics-processing automation more efficient, modular, and intelligent.

Six new products will make their debut at the show, including next-generation dosers, high-efficiency dedusters, a fully redesigned HALO Server, and new supervision modules also available in a mobile version. All innovations focus on native line integration, ensuring more continuous processes, consistent data collection, and faster setup.

Discover all the new technologies we’ll present in Düsseldorf: download the full PDF here.

And to explore our innovations in detail, visit us at Hall 11 – Stand G34: we look forward to seeing you!

by Laura Franceschi

Vismec participates in MECSPE 2025, the international trade fair for the manufacturing industry

From March 5 to 7, 2025, Vismec will take part in MECSPE, the International Trade Fair for the Manufacturing Industry. This year marks the 23rd edition of the event, which will take place in Bologna.

Our company will be present at Hall 36, Stand B 66 – come meet our team in person!

Vismec at MECSPE 2025: highlights

Among the key topics, the 2025 edition of MECSPE will focus on sustainability and the digitalization of industrial processes.

Vismec has extensive expertise in both areas. Our drying, conveying, and dosing systems for plastic granules:

• Enable efficient process management in terms of energy savings and resource optimization, while ensuring excellent quality results.
• Are integrated with Industry 4.0 control systems, which facilitate operators' tasks and allow for data interoperability in advanced industrial automation.

One example? The integration of our machines with the universal OPC UA interface, enabling Vismec industrial devices to communicate seamlessly with manufacturing companies' management systems and existing control devices.

Want to learn more? Come visit us at MECSPE 2025: Hall 36, Stand B 66!

by Laura Franceschi

Plastic raw materials: the different types of plastic granules

Plastic raw materials are used in many industrial sectors and are the starting point for a wide range of production processes. They mainly consist of plastic granules and pellets.

In this post, we will analyze the characteristics and differences between granules and pellets. Then, we will propose a classification of plastic granules according to the material they are made of and their behavior during processing. Finally, we will offer an overview of Vismec systems for dehumidifying, transporting, dosing and storing plastic granules.

Plastic raw materials: granules and pellets

Within the field of plastics, the words ‘granules’ and ‘pellets’ are often used interchangeably. However, there are also significant differences between these two types of plastic raw materials, regarding the production method, shape and fields of use.

• Plastic granules are small plastic particles, generally irregular in shape, resulting from crushing processes or the recycling of pre-existing materials. They are used both for ordinary processes and for specific applications, such as the production of technical polymers or bioplastics.
• Pellets, on the other hand, are obtained by extrusion and subsequent cutting of the molten material. Unlike granules, plastic pellets have a regular shape, generally cylindrical. Their regularity makes them ideal for industrial processes that require a precise and constant dosage.

Both are key elements in the plastics production chain: the choice between one or the other format depends on the needs of the production process and the characteristics of the desired product.

The different types of plastic granules: classifications

The classification of plastic granules can be carried out according to different criteria, including their hygroscopic properties and their composition. These aspects also determine the processing conditions and their possible industrial applications.

Hygroscopic and non-hygroscopic granules

A first criterion is based on the granules' ability to absorb moisture from the environment.

• Hygroscopic granules absorb and retain moisture in their molecular structure: this can compromise their properties during processing, altering the characteristics of the finished product. Consequently, the dehumidification phase before their use in production processes must be extremely effective. The most common hygroscopic materials include polyamide (PA), polycarbonate (PC), polyethylene terephthalate (PET) and polyurethane (PU).
• On the contrary, non-hygroscopic granules do not absorb moisture internally but can still retain water on the surface. Polymers such as polyethylene (PE), polypropylene (PP) and polystyrene (PS) belong to this category. So it is easier to manage the elimination of humidity in these materials during the preparation phase for the production process, although they still require drying.

When working with hygroscopic granules, control of the dew point becomes particularly important. The dew point is the temperature at which the humidity present in the air begins to condense. Measuring the dew point, in this case, helps to correctly manage dehumidification, helping to ensure the quality of the finished product.

Classification based on the material

A second classification criterion concerns the material the granules are made of, an element that influences the mechanical and chemical properties of the granule and, consequently, the organization of the production process. Among the most common materials are:

1. Polyethylene (PE), used for packaging, pipes and films thanks to its chemical resistance and flexibility;
2. Polypropylene (PP), valued for its rigidity and heat resistance, used in sectors such as automotive and packaging;
3. Polystyrene (PS), suitable for light applications such as food containers and insulating materials;
4. Polyamide (PA), known as nylon, used for gears and technical components thanks to its resistance to wear;
5. Polycarbonate (PC), used for applications that require transparency and impact resistance, such as lenses and screens;
6. Polyethylene terephthalate (PET), very common in packaging, especially for food;
7. Polyurethane (PU), valued for its elasticity, resistance to abrasion and versatility, used in applications ranging from industrial coatings to components.

There are many other raw materials used to make plastic granules: we have listed the main ones.

Vismec machinery for the treatment and management of plastic granules

Drying, transportation, dosing and storage of plastic granules and pellets are essential during the plastic processing stages to ensure the quality of the finished product and production efficiency. Vismec designs systems and machinery for the effective management of these processes, offering customized solutions to optimize performance and reduce costs.

• Drying. We have already mentioned how dehumidification is crucial, as residual humidity in the polymers can compromise the quality and resistance of the final product. Vismec wheel dehumidifiers are innovative and efficient dehumidification solutions with low energy consumption.
• Conveying. The transportation of plastic granules, whether individual or centralised, allows for the automatic distribution of the material to the various processing stations. Vismec pneumatic transportation systems reduce downtime and ensure safe material handling: efficiency and high performance.
• Dosing. Accurate granule dosing allows for a high-quality, homogeneous mixture, especially in applications that require the combination of several polymers or additives. Vismec offers volumetric doser and gravimetric doser systems that ensure perfect control over the quantity of dosed material, avoiding waste and guaranteeing a uniform result.
• Storage of granules and pellets. Vismec offers robust and reliable solutions for the storage of granules and pellets, to preserve the integrity of the material and facilitate its use. The containers are designed to facilitate manual or automatic loading and are made with a modular structure that makes them suitable even for the most demanding industrial applications.

Are you looking for innovative, high-performance systems for managing plastic granules in your company? Contact our team: we will be glad to help you.

by Laura Franceschi

De-oilers: what they are used for, applications in plastic granule drying

The de-oiler (or oil trap) is a device used to ensure efficiency and cleanliness in various industrial processes. In this article, we will see how it works, discuss its main uses and present its role in drying plastic granules. Then, we will analyse the characteristics and advantages of de-oilers designed and manufactured by Vismec.

De-oiler: what it is and its uses in industry

A de-oiler is a device designed to purify an air or liquid flow from oils or oily residues, to ensure that the machinery or plant in which it is used remains clean and efficient at all times. Its operating mechanism is based on advanced filtration principles, often combined with mechanical or centrifugal technologies, to capture oil particles and other impurities.

The process generally involves the following steps:

• oil inlet, i.e. the fluid (air or liquid) enters the de-oiler through a dedicated opening;
• oil separation, i.e., thanks to specific filters, combined in some cases with the generation of centrifugal movements according to the principles of physics, the oil particles are effectively removed from the fluid;
• collection of impurities, i.e., the newly separated oil is collected in a dedicated chamber, which can be emptied manually or automatically;
• clean fluid outlet which, now free of oily contaminants, flows out of the device ready to be fed back into the plant or machinery.

The de-oiling device is used in several industrial sectors where the cleanliness of machines and production or processing systems is particularly important. Examples of its main uses include its application in the food industry, where this device is used to remove oily contaminants from food or beverage conveying systems, maintain food safety and help to ensure its safety for consumption by the end user.

Oil traps are also very frequently used in wastewater treatment or reclamation. In this case, they operate to separate oil and grease from water before discharge or eventual reuse.

In the industrial sector, they are used, for example, in hydraulic mechanical systems: in this case, they help to separate the oil from the fluids to ensure the correct functioning of the equipment and prevent possible problems or interruptions. Similarly, in industrial air compressors, our de-oilers ensure the removal of oily residues in the compressed air flow, preventing damage to machinery and pneumatic systems.

In the plastics industry, de-oilers are particularly relevant in the drying of plastic granules, a sector in which our company operates. In this context, this device ensures that the air used in the drying process is free from oily contaminants, improving the quality of the finished material and the service life of machines and equipment. In the next section, we will describe the Vismec de-oilers, explaining their features and advantages.

The advantages of Vismec Oiltrap 

The Vismec Oiltrap is an effective solution to ensure that the airflow used in plastic drying processes remains clean and free from oily residues. As a result, this device also safeguards the perfect cleanliness and properties of the granules, preventing them from causing problems during processing or lead to flawed end products.

The operating mechanism of the de-oiler, that our company designs and manufactures, operates by the condensation of oily vapours. The fluid passes through the device following well-defined paths, condensing by means of special heat exchangers and allowing effective separation of the oil particles.

These particles concentrate at the bottom of the de-oiler tank, where they are collected in a transparent glass container for easy disposal. A butterfly valve allows easy and safe draining of the condensed oil.

Vismec de-oilers have many technical features tailored to the needs of the customer companies:

• practical quick couplings that facilitate the removal of the exchangers during maintenance operations;
• durable design with brass connections and hydrophilic aluminium frame, designed to resist corrosion;
• energy efficiency, especially in the cross-flow exchanger version, that allows heat recovery;
• high filtration capacity thanks to the two-stage system (optional) to remove up to 99.99% of oil;
• suitable for air flows up to 200 m³/h and temperatures up to 200 °C;
• simplified maintenance, since the exchanger geometry is designed to minimize the need for cleaning.

Therefore, our Oiltrap offers many advantages including, as mentioned, the very high effectiveness of the cleaning action and the reduction of maintenance costs. Moreover, it is also suitable for use in sectors with extremely stringent technical specifications, such as the medical, pharmaceutical or bioplastics sectors.

If you operate in the plastics sector and need reliable and innovative dehumidification solutions for your company, our Vismec technical team is at your disposal. Contact us and find out how our dryers can improve the efficiency and quality of your production processes.

by Laura Franceschi

Venturi aspirator: all about it and why it is important in granule conveying

The Venturi aspirator is an innovative device that exploits the laws of physics to create a vacuum flow without using the movement of mechanical parts. Thanks to this feature, it is widely used in various industrial sectors, including the conveying of plastic granules.

In this article, we will explain how the Venturi vacuum cleaner works, the advantages it brings and its applications. Then we will focus on the Venturi vacuum cleaners designed and manufactured by Vismec for conveying plastic granules.

Venturi suction unit: how it works

The operation of the Venturi vacuum cleaner is based on the so-called “Venturi effect”, a principle of the physics that exploits the pressure variation created by the passage of a fluid through a variable-shaped duct. This effect creates a low-pressure area that allows air or other substances to be sucked in, without the need for moving parts or motors.

In order to better understand the mechanism that regulates this unit, here is a description of the operating phases of a Venturi vacuum cleaner.

• Engine fluid injection. A fluid, usually compressed air, is introduced into the vacuum cleaner through a special duct.
• Passage through a narrow duct (nozzle). The fluid is subjected to an acceleration as it passes through a narrow area of the inner duct, increasing the speed and reducing the pressure according to Bernoulli's principle.
• Creation of the suction zone. After the narrowing, a low-pressure zone is created. It allows air or materials to be sucked from a side or dedicated opening.
• Mixing and outlet. The aspirated fluid mixes with the motor fluid and is expelled through the outlet of the device.

Thanks to this simple and effective operation, the Venturi aspirator offers several advantages. The first is the absence of moving parts, which eliminates the need for mechanical maintenance and extends the life of the unit. Another advantage is a usually very compact design, easy to integrate into existing systems. Finally, it is a very reliable suction system, that suits even the most demanding operating conditions.

The applications of the Venturi vacuum cleaner are many and varied and include, for example:

• chemical industry, where the device is used for conveying and handling powders and fluids;
• food industry, where the aspirator is used to transport dry ingredients such as cereals;
• plastics industry, with particular reference to plastic granules conveying.

In granule conveying, the Venturi vacuum cleaner ensures a continuous and uniform flow of materials, reducing the risk of blockages and optimising process efficiency. In the next section, we will take a closer look at the use of this device, introducing the solutions designed and manufactured by Vismec.

Venturi suction in granule conveying: Vismec solutions

The Venturi vacuum cleaner designed and manufactured by Vismec is an ideal solution for conveying plastic materials such as masterbatches or granule additives. Freestanding and powered by compressed air, it is particularly suitable for low volume production and can be installed directly above a drying hopper. Its design allows a smooth and continuous feeding process, with the possibility of adjusting the conveying air power by means of flow regulator.

The main technical features of the Venturi vacuum cleaner we offer include:

• reliability over time, stable and safe operation even under continuous use;
• solid and compact structure, entirely made of stainless steel to guarantee robustness and durability;
• dust separation efficiency, the spiral lid and the unique cyclonic vortex improve suction and separation performance;
• advanced filtration, equipped with a stainless steel expanded micro mesh filter, it is easily washable;
• intelligent monitoring, integrated with a capacitive sensor to monitor the material level and a visual alarm to warn of any shortage;
• simple control, that is a basic simple, intuitive and functional control system to facilitate adjustment by operators.

The advantages of this unit include, as already mentioned, the absence of mechanical moving parts and the consequent reduction in maintenance costs. The vacuum cleaner is also extremely silent, helping to reduce noise in the production environment and the associated inconvenience.

Thanks to its structural and functional characteristics, the Venturi vacuum cleaner we propose is ideal for handling the conveying of plastic granules over short distances and for quantities up to 70 kg/h. These elements make it perfect for short-scale applications.

Are you looking for innovative and effective solutions for granule conveying in your plastics company? Contact our team: we will offer you technical support and personalised advice to improve the performance and efficiency of your conveying processes.

by Laura Franceschi

Hot air dryer for plastic dehumidification

Hot air dryers are essential in the plastic processing industry. Effective drying of plastic granules ensures that businesses in this sector have completely dry materials for use in processing stages, thereby guaranteeing the quality of the final product. In this article, we will explore what hot air dryers are, how they work and what advantages they offer. We will explain the differences between drying and dehumidification and present the technical solutions and advantages offered by Vismec air dryers.

What a hot-air dryer is and how it works

A hot air dryer is a device designed to remove surface moisture from plastic granules by using heated air. Below are the detailed process steps.

1. Heating the air. The air is heated using electric heating elements or other heating systems. As we are going to see in more detail in the last paragraph, in the case of Vismec dryers, specific systems control the air temperature very precisely.
2. Hot air circulation. Hot air flows through the hopper, absorbing surface moisture present on the plastic granules. This process is particularly effective for non-hygroscopic polymers, which do not retain moisture within their structure.
3. Expulsion or recirculation of moist air. In particular, in open-circuit systems, moist air is expelled and replaced with fresh air. In total or partial recirculation systems, on the other hand, moist air is filtered, reheated and reused, reducing energy consumption.
4. Control and regulation. The air flow rate can be adjusted manually or automatically to suit specific operating requirements. Advanced models, such as those from Vismec, include smart mode management functions and temperature probes to optimise energy efficiency.

These steps, when conducted efficiently, ensure a perfect drying of the granules while minimising residual moisture. In this way, plastics processors can have completely dried polymers, guaranteeing the quality of the final product. The drying cycle can also be continuous, ensuring a constant flow of dry granules to the machinery.

Drying and dehumidification: differences

Although they are often used synonymously, drying and dehumidification are two distinct processes.

• Drying refers to the removal of surface moisture from materials: a process suitable for non-hygroscopic polymers that, as mentioned, do not absorb moisture from their surroundings. In other words, these polymers do not significantly change their physical and chemical properties when exposed to moisture or water. This makes them different from hygroscopic polymers, which instead tend to absorb moisture, altering their structure and behaviour.
• Dehumidification, on the other hand, applies to hygroscopic materials that absorb moisture from the environment, such as PET. This dessication process uses more advanced and structured technologies.

With regard to this last point, the wheel dehumidifiers that our company designs and manufactures have an internal rotor to dehumidify the granule. However, in dryers, this element is omitted.

In various industrial contexts, both drying and dehumidification prepare the plastic granules for optimal processing. This condition, as we have already seen in previous articles, is particularly important in processes such as moulding or extrusion, or in sectors such as the electronics industry and the medical or food industries, which require perfectly dry granules to meet high quality standards.

Vismec air dryers: features and advantages

Vismec hot air dryers are designed to remove surface moisture from non-hygroscopic polymers. Combined with an adsorption dehumidifier, they can also handle highly moist hygroscopic polymers.

Key features of our dryers include:

• Variable air flow. Vismec dryers are equipped with a system that allows the air flow rate to be adjusted according to operational requirements, optimising consumption.
• Energy optimisation is achieved through smart mode management, a return air temperature probe, and a PID algorithm, which maintains a constant and precise air temperature during the process, ensuring uniform drying.
• High-efficiency blowers. The smaller models use brushless blowers, while the larger versions are equipped with IE2/3 motors and inverters, ensuring efficiency and durability.
• Advanced technology. The AG models have a 7-inch touchscreen control and a valve to manage recirculation, eliminating the need for cooling.

Vismec hot air dryers offer a number of advantages, thanks to their advanced technical features.

• Continuous drying process, for an uninterrupted workflow that maintains high productivity.
• Adaptability and energy savings. The internal devices we have described in detail allow the dryer to be adapted to specific needs, optimising energy consumption.
• Ease of use. Touch screen controls and remote monitoring options make Vismec dryers easy to operate and manage, improving operational efficiency.

Our hot air dryers offer flexible installation options, either mounted on machinery or placed next to moulding or extrusion equipment.

Looking for a high-performance hot air dryer for your plastic processing needs? Contact us to find the ideal solution for your business. 

by Laura Franceschi

Pneumatic conveying of granules in industry: what it is, applications, Vismec solutions

In the plastics industry, pneumatic conveying of granules and pellets is a very important auxiliary technology. A well-designed and efficient conveying system ensures efficient and fast processes, and its components can be adapted to meet the specific needs of the user company.

In this article, we will present in detail how pneumatic granule conveying systems work and the advantages offered by the solutions designed and implemented by Vismec in this sector.

Pneumatic conveying of plastic granules: how it works

Pneumatic conveying is a method of handling solid materials, such as granules and pellets, using an air or gas flow. The kinetic energy of the flow pushes the materials through a system of pipes and ducts, allowing for a fast and secure transfer.
Unlike traditional conveying methods, such as belts or screw conveyors, pneumatic conveying reduces the risk of contamination and damage to materials. This makes it perfect for the plastics industry, where maintaining the properties of plastic granules and preventing contamination is crucial to ensure the high quality of the finished product.

The operation of a pneumatic conveying system relies on several key components, including the compressor, transport pipes, valves and vacuum units.

1. The process begins with the suction of granules through a Venturi vacuum unit, which creates a vacuum in the system, allowing the materials to be extracted from their container.
2. Once aspirated, the granules are transported through pipes of various lengths and diameters, according to the specific requirements of the system in terms of speed, flow rate and distance.
3. Along the way, compressed air helps keep the materials in suspension, preventing material build-up, pipe clogging and, as mentioned, granule contamination.

The applications areas of pneumatic conveying in different industries are more than one. For example, in the food, chemical and pharmaceutical industries, pneumatic conveying helps manage powders, granules and ingredients in a hygienic and safe manner, both for process operators and end consumers. In the mining and metallurgical industries, pneumatic conveying is used to move minerals, metal powders, heavy and abrasive materials. In the wood industry and building materials manufacturing, it is used for handling chips and powders from various materials.

In the plastics industry, similarly, pneumatic conveying is used for the conveying of granules and pellets, but also for the handling of powders and bulk materials, helping to simplify and speed up production processes. In particular, conveying systems support moulding, extrusion and blow moulding processes, where speed and efficiency in the conveying stage ensure a better manufacturing organisation, material quality and successful processing.

Moreover, pneumatic granule conveying systems can be integrated with other machinery, such as storage systems and mixers. Thanks to its capability to adapt to various applications and plant configurations, pneumatic conveying represents a versatile, efficient choice tailored to the specific needs of each company.

Vismec plastic granule conveying systems

In the plastic processing operations, Vismec pneumatic conveying systems are naturally involved in machine feed phase to ensure the continuous and optimal flow of materials. The granules are transferred from storage containers directly to processing plants, such as injection moulding presses or extruders. In these steps, the speed and efficiency of pneumatic conveying significantly help maintain productivity and reduce downtime.

Vismec offers centralised pneumatic conveying solutions for plastic granules that provide numerous advantages to the companies. Our plants, ranging from small to more complex systems, enable a rapid and controlled conveying of granules, optimising production logistics.
In particular, the larger centralised systems can manage up to 48 conveying stations, thanks to technically advanced control systems. Such plants can be equipped with various accessories which help maintain a clean working environment, optimise consumption, and facilitate maintenance. We have discussed this in more detail in the dedicated article.

A key element in the effective operation of granule conveying systems is the Venturi vacuum cleaner. This device, which operates by using the principle of vacuum, ensures an efficient aspiration in the initial phase of the process. By generating a vacuum within the system, Venturi hopper and loader allows for a quick extraction of materials without damaging them.

Venturi vacuum cleaner recently designed and manufactured by Vismec stands out for its reliability and ease of operation. In fact:

• it has a simple, compact design and can be easily integrated into various conveyor systems;
• thanks to the absence of moving parts, it requires little maintenance compared to other aspiration systems;
• it can be installed on a drying hopper;
• it efficiently vacuums materials without damaging them, and, thanks to its unique cyclonic vortex, it ensures an even more effective dust separation.

Venturi units tend to consume less energy than other aspiration devices. The vacuum cleaner produced by Vismec, in addition, allows the power of the conveying air to be adapted via a flow regulator, further optimising consumption.

As we have seen, the pneumatic conveying systems for plastic granules designed and manufactured by Vismec, in all their components, are not only high-performing but also adaptable to the specific needs of companies and capable of managing even complex conveying setups efficiently. Would you like to know more about it? Contact our team.

by Laura Franceschi

Vismec technologies supporting plastics processing: all the advantages

In plastics processing, the efficiency of operations is also influenced by the technologies used. For example, advanced granule conveying systems and drying plants help to ensure good results in moulding, extrusion, and blow moulding operations.

In this article, we will present the impact of efficient, high-performance conveying and drying systems on plastics processing. We will also discuss the advantages offered by Vismec systems to plastic manufacturing companies looking to improve their productivity, reduce costs, and achieve high-quality results.

The advantages of effective granule conveying in plastics processing

An optimised granule conveying system directly impacts the efficiency and quality of plastics processing, ensuring that material is transferred smoothly and without interruptions.

In the extrusion process, the granule conveying system must ensure a constant supply of material, avoiding interruptions that can compromise product quality. In fact, an irregular conveying system for granules arriving at the extrusion screw can cause variations in thickness and aesthetic defects in extruded profiles, tubes, or plastic films.

On the other hand, the advantages of an efficient granule conveying system with a constant material flow include:

• reduction of machine downtime due to feeding issues;
• optimal management of raw materials, preventing excesses or shortages of granules through a controlled material supply.

In the injection moulding process, a high-performance feeding system helps ensure the absence of contaminants in the plastic material, thermal balance, and proper distribution of granules. An inadequate system, conversely, may cause air bubbles or cavities in the finished product or retain impurities in the granule mix, compromising the strength and aesthetics of the moulded parts.

In blow moulding, where molten plastic is inflated in a mould to create hollow containers, the quality of the material must be ensured from start to finish. An efficient granule conveying system ensures that the material reaches the machine without significant variations in its basic conditions, allowing for:

• granules temperature control to ensure uniform melting during the process;
• reduction of potential structural defects or fragility caused by irregularities in the material;
• higher production speed, thanks to a continuous and smooth flow of granules.

Vismec offers granule conveying systems designed to ensure efficiency and reliability at every stage of the production process. Our centralised conveying plants enable automated handling of granule conveying from loading stations to the various processing machines, guaranteeing a constant flow of material and minimising human intervention.

Automation reduces process errors and material waste as well as enables continuous monitoring of conveying quality through advanced control systems such as Vismec FW50. Additionally, the presence of modular or adaptable components such as cyclonic filters ensures an optimal management of the different processing stages according to customer demands.

Advantages of effective drying of plastic polymers

An effective drying of plastic polymers contributes to the efficiency of production processes and the quality of the finished product. This is why the use of a high-performance drying system is crucial, especially considering the characteristics of the various plastics processing methods.

In the extrusion process, for instance, the presence of moisture can generate surface defects and air bubbles, compromising product quality. Conversely, effective drying ensures that granules are moisture-free before being melted, enhancing material consistency and homogeneity during extrusion. This results in defect-free products with uniform and strong surfaces, and it safeguards the mechanical performances of the material.

In injection moulding process, drying is equally strategic. If the granules are not dry enough, they may undergo hydrolysis processes that deteriorate the mechanical properties of the material, making it less resistant. Additionally, moisture can cause imperfections on moulded parts, compromising both aesthetics and functionality. Effective drying prevents these difficulties, ensuring that the piece meets the required quality standards, especially in sectors with stringent technical specifications, such as medical or advanced electronics.

Moisture can also have a significantly negative impact in blow moulding. Excessive water quantity in granules may cause changes in the viscosity of the molten plastic, generating weak points on the surface of the blown piece and compromising its structural resistance. An effective drying system, on the other hand, ensures defect-free and structurally strong products.

Considering the characteristics of the processes and the needs of the companies, Vismec offers a range of technologically advanced solutions for the drying of plastic granules. Here, the main ones:

• Drywell: compact and high-performance, designed to reduce floor space and ensure maximum ease of use.
• Dryplus: extremely versatile, installed onboard the machine, optimises energy consumption, by reducing it by up to 40%.
• DryCube: perfect for drying and conveying technical plastic granules, it combines the efficiency of a rotor dehumidifier with an integrated pneumatic conveying system, a receiver for the drying hopper, an IMM receiver, and related accessories. Flexible and independent, it is positioned beside the processing machine.

The advantages of Vismec systems also include an accurate control of residual moisture within granules, a modularity that makes it easy to adapt the systems to different production requirements, and reduced machine downtime.

Thanks to these technologies, companies can improve product quality, reduce waste, and increase operational efficiency. Discover how: contact our team!

by Laura Franceschi

What an industrial dryer is for: operation, applications, Vismec solutions

What is an industrial dryer for, and what are its fields of application? In production processes, moisture control allows ensuring the quality of processed materials, production efficiency and a successful final outcome. 

Therefore, in many sectors, a proper drying dehumidification prevents defects, reduces processing times, and preserves the longevity of products durability. We are going to talk about it in this piece, explaining the operation and purpose of an industrial dryer, with a focus on the plastics sector and on the cutting edge solutions offered by Vismec.

What is an industrial dryer for?

An industrial dryer is a device designed to remove moisture from the air or materials used in production processes. It works by reducing the water vapour and ensuring that materials are dry and ready to be processed, avoiding moisture negatively impact the process or the final product. This type of machinery is used in various situations where a controlled working environment is essential for successful production.

The operation of an industrial dryer is based on several technologies, some of which are more obsolete and others decidedly more advanced. The choice of the method to reach the best result depends on various factors, such as the type of material, its shape and density, and the expected performance of the process. Here are some of the most used dehumidification methods in industry.

• Drying ovens: a discontinuous and obsolete method that exposes the object or material to be dried to the agents of the surrounding environment, with potential risks of contamination and deterioration.
• Hot air drying: continuous drying system with high energy consumption. Furthermore, environmental conditions significantly influence the process.
• Compressed air drying: a method that uses clean, dry compressed air but requires high consumption and costs, making it suitable only for productions.
• Infrared rays: a fast, continuous process suitable only for large volumes of material, with high costs both in technology acquisition and in energy consumption.
• Dryers with vacuum technology: a method that uses pressure variations to lower the boiling point of water and decrease moisture, reducing drying times and energy consumption.
• Molecular sieve dehumidification: a continuous process with high energy consumption. However, as it is a closed-loop technology, the dehumidification is not affected by environmental conditions.
• Honeycomb sieve wheel dryers: a new generation of dehumidifiers which are more efficient and require a lower maintenance than traditional molecular sieves. These are the industrial dryers designed and manufactured by Vismec.

The question, "What is an industrial dehumidifier for?” does not have a single answer, as its fields of application are numerous. In the food industry, for example, moisture control prevents the growth of mould and bacteria, maintaining products' suitability to be consumed. In the pharmaceutical industry, it helps to preserve the stability of active ingredients and the safety of medicines.

In the electronics industry, drying protects sensitive components from moisture, preventing malfunctions or short circuits. In the metallurgy sector, excessive moisture can lead to rust and compromise the quality of finished products. So, a good drying is definitely necessary.

In the plastics processing industry, the use of dryers is particularly important. So, in the next section we will outline why, and we will focus on the characteristics and operation of Vismec’s wheel dryers dehumidifiers for plastic granules.

Focus on the plastics industry: Vismec dryers

Even in the plastics industry, the granules drying is crucial to ensure the quality of the finished product. Polymers, indeed, tend to absorb moisture from the environment; inadequate drying can compromise subsequent production processes, causing defects such as bubbles, opacity, colour differences or brittleness.

A proper moisture removal, on the other hand, preserves the mechanical and aesthetic properties of materials, improving production yield and reducing waste. We have discussed this extensively in other articles, such as the one dedicated to dew point or the one explaining how to properly choose a plastic industrial dryer.

Aware of the importance of this process, Vismec offers a range of energy-efficient, high-performance industrial wheel dryers. These machines use honeycomb sieve technology, compact structures that allow for optimal moisture removal.

Our industrial dehumidifier's operation is based on the use of a sieve on a moving wheel that absorbs moisture from the granules and releases it later during the regeneration phase. This system ensures a continuous and effective drying cycle without the need for compressed air or cooling water. 

One of the main advantages of Vismec’s wheel dryers is the reduction in energy consumption, with savings up to 40% compared to traditional systems. Additionally, automatic air flow control and the MPM (Material Protection Management) system protect the granules from the risk of over-drying and material degradation.

Among our wheel dryers:

• Dryplus is ideal for those seeking a reliable and precise process, with a drying temperature up to 180°C and a constant dew point up to -50°C;
• Drywell, thanks to its modular structure, it stands out for its energy efficiency and adaptability to production needs;
• DryCube, finally, represents a compact and versatile solution, perfect for installations in small spaces without compromising performance.

Now that you better know what dehumidifiers are used for in the industrial sector, you are ready to choose the most suitable one for your company's needs. Contact our team!

by Laura Franceschi

Vismec at Fakuma 2024, International Plastics Processing Trade Fair: October 15-19, Friedrichshafen

From October 15 to 19, 2024, Vismec will take part in Fakuma, one of the most important trade fairs in the plastics processing industry. This year will mark the 29th edition: the second consecutive year our company is participating. The event, as always, will be held in Friedrichshafen, Germany, and our booth will be number 2218, set up in Hall B2.

Fakuma 2024 Program

Fakuma is a strategic event for companies and professionals in the plastics sector: over 1,600 exhibitors from all over the world will attend the fair. For Vismec, being present means the opportunity to showcase the products we offer for the drying, transportation, storage, and grinding of plastics to a select audience in an industry increasingly focused on innovation and sustainability.

Among the key topics of interest during the event are:

• Technological innovation and process optimization in plastic processing;
• Sustainability, resource reuse, and new eco-innovative materials;
• Applications in advanced sectors, such as the medical field and bioplastics.

Vismec is preparing for the 2024 edition of Fakuma with the goal of highlighting the advanced features of the machinery and systems we offer, focusing on efficiency, energy savings, and quality results, even in sectors with advanced technical requirements.

Would you like to learn more about our company and its products? Contact us or visit us at the fair: we look forward to seeing you from October 15 to 19 in Friedrichshafen, at booth B2 2218.

Dal 15 al 19 ottobre 2024 Vismec prenderà parte a Fakuma, una delle più importanti fiere nel settore della lavorazione delle materie plastiche. Quella di quest'anno sarà la 29esima edizione: la seconda consecutiva a cui la nostra azienda partecipa.  L’evento si terrà come sempre a Friedrichshafen, in Germania e il nostro stand sarà il numero 2218 allestito nella Hall B2 

Il programma di Fakuma 2024

Fakuma è un appuntamento strategico per aziende e operatori del comparto materie plastiche: alla fiera parteciperanno oltre 1600 espositori da tutto il mondo. Essere presenti significa per Vismec poter presentare i prodotti che offriamo per la deumidificazione, il trasporto, lo stoccaggio e la granulazione delle materie plastiche ad un pubblico selezionato, in un settore sempre più attento a innovazione e sostenibilità.

Tra gli argomenti di maggior interesse durante l'evento, ci saranno infatti temi quali:

• Innovazione tecnologica e ottimizzazione dei processi di lavorazione delle materie plastiche;
• Sostenibilità, riutilizzo delle risorse e nuovi materiali ecoinnovativi;
• Applicazioni a settori avanzati, come quello medicale e delle bioplastiche.

Vismec, dunque, si sta preparando all'edizione 2024 Fakuma  con l’obiettivo di mettere in evidenza le caratteristiche avanzate dei macchinari e degli impianti che proponiamo dal punto di vista dell'efficienza, del risparmio energetico e della qualità dei risultati, anche in settori dalle caratteristiche tecniche avanzate.

Vuoi conoscere meglio la nostra azienda e i suoi prodotti? Contattaci oppure passa a trovarci in fiera: ti aspettiamo dal 15 al 19 ottobre a Friedrichshafen, allo stand B2 2218.

by Laura Franceschi

Vismec bio dryers: advanced technology for bioplastic drying

The bioplastics industry is growing steadily, driven by a widespread research for sustainable solutions in material choices, production methods and technologies. However, bioplastics processing presents complex challenges, particularly in terms of ensuring a proper drying of plastic granules. 

Here we will focus on the area of bioplastic drying, describing its needs and challenges. Finally, we will present the advanced solutions proposed by Vismec for this sector, with an innovative line of bio dryers.

Bioplastic drying challenges 

The drying of bioplastics is a critical phase in plant-based or biodegradable plastic processing. Unlike traditional plastics, bioplastics have characteristics that make them more sensitive to moisture. The presence of residual moisture in plastic granules, as we have already explained in previous pieces, can negatively impact the final quality of the product. 

Let’s see some of the main challenges that the industry have to face in bioplastic dehumidification:

1. High hygroscopicity - Bioplastics, such as PLA (polylactic acid), bio-based polyethylene, or Mater-Bi, are highly hygroscopic: they tend to absorb moisture from the surrounding environment. This characteristic can lead to various problems during manufacturing, such as thermal degradation, reduced viscosity, and the formation of bubbles or imperfections in the finished product. Moisture removal is, therefore, essential to maintain the mechanical and visual properties of the product. For more information, we have explored the concept of "hygroscopic material" in our article on dew point.
2. Thermal degradation - Bioplastics are particularly sensitive to high temperatures. Inadequate or excessive drying can lead to a sensitive heating during extrusion or moulding, causing material degradation. This phenomenon can compromise the strength and integrity of the product, needing an extremely precise temperature management during the dehumidification process.
3. Sensitivity to environmental conditions - Bioplastics are organic materials derived from corn, rice and wheat, which make them more sensitive to environmental changes compared to traditional plastics. Relative humidity, temperature, and even air quality can influence the moisture content of plastic granules. This sensitivity requires a constant and precise control of the drying process to avoid defects during the production.
4. Need for consistent processes - One of the most delicate challenges in bioplastic drying is maintaining process uniformity. Even small variations in moisture content among different granules can lead to significant differences in the final product quality. This makes it essential to adopt technologies that ensure uniform dehumidification on a large scale.
5. Environmental impact - Sustainability is at the heart of the bioplastics industry. Therefore, drying processes must be designed to minimise the environmental impact. This means, for example, minimizing energy consumption and managing resources efficiently, reducing waste while maintaining effectiveness.

Facing these challenges requires both a deep understanding of the materials involved and the adoption of cutting-edge technologies to precisely manage the characteristics and critical issues of bioplastics. As we are going to see in the next paragraph, Vismec Bio Dryers are designed and built keeping in mind these needs.

Vismec’s advanced solutions for the sector

Starting from our standard machinery, our company has developed a line of driers specifically designed to meet the needs of the companies that process bioplastics.

The innovative design approach we have chosen eliminates the need for compressed air or cooling water, thanks to the presence of a post-cooler with a thermostat integrated directly on the dryer. This approach not only reduces system complexity but also lowers the operating costs and environmental impact.

Moreover, Vismec’s bio dryers are designed to operate at low temperatures, keeping the bioplastics intact and ready for use. Their technical features include:

• wide range of drying temperatures - These dryers can operate effectively between 35°C and 50°C, ideal for low-melting-point biopolymers. The minimum adjustable temperature that can be set is 30°C, with a maximum differential of 7°C compared to ambient temperature.
• Air-to-air heating system - An innovative heating chamber with ventilation ensures that the heated air maintains the optimal temperature for the process, avoiding thermal fluctuations that could compromise the quality of the treated bioplastics.
• Model variety - Vismec dryer range includes several models, from DW14 with a capacity of 14 m³/h up to DP1200 with a capacity of 1200 m³/h. This versatility allows us to offer flexible solutions for both small-scale and large-scale manufacturing.
• Optional HEPA filter - To ensure the highest purity of the air used in the drying process, the bio dryers can be equipped with our HEPA filter, ideal for applications that require particularly rigorous hygienic conditions.

So, Vismec bio dryers offer several advantages to companies working with bioplastics. The ability to operate at low temperatures ensures that materials are not damaged, preserving the quality and integrity of the final product. Additionally, the eco-friendly technical design helps to reduce the overall environmental impact.

Would you like to examine in depth the topic and discover how our dryers for bioplastics combine operational efficiency with attention to the environment? Contact our team: we are at your disposal.

by Laura Franceschi

Vismec plastic mixing machines: features and advantages

In the plastic processing sector, plastic mixers play an important role: a homogeneous and constant mixing allows obtaining quality products. In this article, we will see how plastic mixing machines work and all the advantages of a good mixing process. Then we will present the features and advantages of Vismec horizontal mixers.

Mixing machines for plastic granules: how they work

Plastic mixing machine combine different types of plastic granules uniformly. These machines find application in various sectors, such as the production of plastic components for automotive, consumer electronics and packaging industries. The mixing process begins with the introduction of plastic granules into the mixer: once inside, the machine's rotating blades start to move, mixing the material. Plastic polymers usually melt and mix at high temperatures, so industrial plastic mixers are designed and built to operate at very high temperatures. The result of the mixing, as mentioned, must be as homogeneous as possible. And a uniform mix generates several advantages. Let’s see them all.

• Product quality. Good mixing preserves the physical and chemical properties of the finished product and makes them durable. Elements like strength, flexibility, and aesthetics can be affected by suboptimal mixing of plastic granules. This characteristic is especially important for technical, engineering and advanced sector applications, where the mechanical properties of plastic products must be consistent and predictable.
• Colour uniformity. If the plastic granules are not mixed uniformly, the colour of the final product may appear not uniform.
• Production process efficiency. The reduction of defects through a well-designed mixing process optimises production efficiency, decreases waste, scraps and returns, consequently reducing management costs.
• Moulding process stability. In injection or extrusion moulding process, that are two of the most common plastic processing methods, a preliminary homogeneous mixing of the plastic granules ensures a more stable melting and material distribution. This reduces process variations and improves product quality.

As we will see in the next paragraph, Vismec mixers have technical characteristics that allow for a qualitatively better mixing when compared to the solutions offered by competitors.

Vismec horizontal mixers: why to choose them

Vismec plastic mixing machines are a key element of the plastic granules dosing systems we design and produce. 

What sets them apart is the mixing system, which is innovative, if compared to similar products available on the market. The material mixing flow occurs along the horizontal axis, unlike in the more common vertical mixers. Operatively, in horizontal mixers, the blades are positioned along a horizontal axis, allowing for a smoother and more continuous movement of the materials. 

This type of mixing is particularly effective in ensuring that all granules are uniformly exposed to the blades, minimising accumulation zones, ensuring better heat distribution, and allowing for a more homogeneous mixing of the material, with the consequent advantages we listed earlier. 

In terms of design and construction, the horizontal mixers produced by our company:

• have a stainless steel structure;
• withstand high temperatures, up to 200°C;
• work in three distinct operating modes: ON, with timer and externally enabled. The timer mode is adjustable.
• have a 6 languages LED graphic display that allows immediate visualisation of the operating status;
• allow for easy maintenance without supporting tools.

In addition, optional extras include wear-resistant mixing blades suitable for fiberglass materials, to broaden the application spectrum to the different needs of client companies.

Would you like to know more about the advantages Vismec horizontal plastic mixers can bring to your business? Contact our technical team: we will be happy to provide you with all the relevant specifications.

by Laura Franceschi

The new Vismec supervisor: better plant control with OPC UA protocol

Today, we are presenting one of the latest Vismec technological developments: the new supervisor integrated with the OPC UA protocol. Thanks to the introduction of Industry 4.0 elements, the device allows for better and more comprehensive plant monitoring. In this article, we will delve into what it is, outlining its purposes and general operating principles. Then, we will focus on the more technical aspects, highlighting the improvements offered over previous solutions. 

The new Vismec supervisor with OPC UA protocol: why we have developed it 

The aim of the new device is to enhance the control and monitoring the capabilities of the various components of the installed plants, as well as the interoperability of different machines. The project was developed to more effectively address certain organisational and operational needs, including the overall verification of plant operation, the visualisation of relevant data, and the identification of any anomalies. Thanks to the new supervisor, and in particular the presence of the OPC UA protocol, it is possible to:

• remotely verify the correct operation of plants and their components, allowing for more targeted interventions when necessary;
• manage access and permissions for each operator who administers, defines, or adjusts machine settings, based on their role and functions;
• improve the connection between the centralised Vismec control system and external software interacting with the machines within the production layout and management system.

The last function mentioned, for instance, can be useful for connecting the Vismec system with a management software used by a client company, through an interface that allows for the visualisation of selected variables of the installed machines. This innovation is made possible by the OPC UA Server added to the new supervisor. 

At the core of these mechanisms is a paradigm shift that represents one of the most significant evolutions in the newly introduced supervisor. In fact, the device’s programming logic shifts from a functional approach to an object-oriented approach. What does it mean? To better understand it, we first need to define what a "software object" is. 

A "software object" is a fundamental concept in object-oriented programming (OOP). This paradigm is based on the idea of organising computer code into "objects," understood as structures that combine data and functions, and that can be used to represent real-world entities or abstract concepts within a program. 

Here are the key characteristics of a software object that help us understand the functioning of the new Vismec supervisor based on OPC UA protocols.

• Attributes (or features). These are variables that contain information about the object's state. For example, in an object representing a person, the attributes might include name, age, address, etc.
• Methods. These are functions associated with the object and define its behaviour. For example, a "person" object might have methods like "walk," "talk," "eat," etc.
• Encapsulation. Objects hide the details of their internal implementation from external users, allowing access only through so-called public methods. This principle helps protect data, a key function in OPC UA protocols, and reduce code complexity.

Thanks to programming according to this logic, the new supervisor allows software objects to interact with each other through message exchanges: for example, transferring data for processing and subsequently receiving the result of their processing. This mechanism translates into better interoperability between software, machinery and users, making plant monitoring more comprehensive and integrated. 

Improvements over previous monitoring systems 

After this technical-methodological overview, we now present in more detail the various functions of the device and the main differences compared to the systems previously used to control the granule conveying, drying, and dosing plants installed at client sites. 

We want to focus particularly on the operational advantages that plastic processing companies can benefit from, thanks to the new supervisor. Here are the main ones:

• improved hardware;
• simplified graphics to immediately highlight the main variables to be monitored, related to each plant component;
• generalised evaluation of the state of each machine in the plant: not only abnormal states are monitored but also normal ones, each associated with a colour code;
• improved alarm system to precisely identify the presence of anomalies, link them to the machine that registered them, and provide additional information such as their location and the time they occurred;
• better interface connection between the centralised Vismec management system and the software used at the client’s site: we already discussed this aspect in the previous paragraph.

Our company is already working on further developments that will make the Vismec supervisor even more complete and integrated. Want to know how the new device can improve your company's performance in terms of organisation, monitoring, and intervention? Contact our team: we are at your disposal.

by Laura Franceschi

A Vismec case study: solutions to the problem of dust in plastic granules

The presence of dust in plastic granules used as raw material in injection moulding can become a significant problem, especially in the production of objects, elements and components that must be perfect in their appearance.

In this article, we are presenting a case study we faced recently.

The client's request: dust removal from plastic granules

The customer who asked for our intervention operates in the plastic processing sector and, specifically, in injection moulding. It is a well established company, with a machine park that includes around 50 presses

In addition to the development and production of moulds, the company also supports customers in the production and assembly of high-quality plastic components in the following sectors:

• domotics,
• medical,
• automotive,
• water treatment.

Regarding the topic of this case study, the company had to cope with a dust problem in plastic granules. The incident occurred during the production of an aesthetic component on behalf of a multinational company operating in the household appliances sector.

Following a problem in the production line, the plastic granule supplier often sent batches of material containing a high amount of dust to our moulding company. The dustiness of the raw granule led to a sharp increase in the percentage of rejected parts, due to inclusions and streaks affecting its aesthetic quality and precluding its use.

As mentioned at the beginning, the presence of dust in plastic granules used as raw material for injection moulding can negatively affect the aesthetic performance of the finished product in several different ways.

1. Surface defects such as scratches, spots, or stains. These occur because the powder does not blend uniformly with the plastic material during the moulding process, creating imperfections on the product surface.
2. Non-uniform colouring. Powder can affect the correct distribution of pigments or dyes in the plastic material. This can lead to colour variations or stains.
3. Finishing problems. Dust in plastic granules can prevent a proper finish. For example, it can make it difficult to achieve a glossy surface or a specific texture, as the dust particles interfere with the surface structure during melting and solidification.
4. Burn marks. During the moulding process, the powder may overheat, leaving dark or burnt traces, particularly evident on light-coloured or transparent objects.
5. Inclusions and bubbles. The powder can trap air or other contaminants, creating inclusions or bubbles in the plastic material that are also visible on the surface.
6. Increased roughness. Dust particles can increase the surface roughness of the finished product, affecting its appearance, touch and in some cases its functional properties.

To avoid situations such as those described, it is important that plastic granules are free of dust and other contaminants. However, as we will see in the next section, the machinery installed did not allow the company we are talking about to solve the dust problem.

The Vismec solution: a tailor-made dust removal plant

In fact, the feeders used by the moulding company and supplied by one of our competitors could not remove the dust from the granules. These feeders were installed all along the material handling cycle: some single-phase with a fabric filter and one three-phase with a ground cartridge filter.

The company tried to solve the problem manually by combining a sieve with a domestic hoover to remove dust from the virgin material before drying. Although this solution improved the situation, it failed in bringing the waste percentage below the required minimum values and resulted in significant loss of time for the operators.  

Consequently, Vismec proposed to the customer a specially designed solution consisting of:

• a side channel blower, model VB 31, with a DR2 three-sector cyclone filter.
• a granule conveying management and control system with four QUAD stations and four VR4 material receivers.

With the supplied machinery, the customer created a material handling chain that includes:

BAG → STORAGE CONTAINER #1 → STORAGE CONTAINER #2 → DEHUMIDIFIER → PRESS

The organisation of such a supply chain has ensured an effective dust removal from the material and a drop in the incidence of waste to normal levels.

As you can see in this case study, Vismec technical and sales team works to offer clients the most effective response to the challenges they face. If your company is also looking for a partner to solve a problem or critical situation in your sector, contact us: we will study the best solution together with you.

by Laura Franceschi

Dew point meter: why to use it

The dew point meter is a device for measuring and monitoring the dew point of the outgoing air in polymer dehumidification systems. These measurements help to ensure the effective dehumidification of plastic granules, ensuring the good quality of the finished product resulting from the plastics processing.

In this article we are going to have a closer look at what a dew point meter is and how it operates. Then we will present the features and advantages of dew point meters designed and manufactured by Vismec.

Dew point meter: what it is and how it works

When drying polymers, especially in the case of technical polymers, it is important to check the functionality and performance level of the drying system.

As we have already explained, residual moisture can be present in the granules used as a raw material for plastic processing, and it can generate serious flaws in the finished products, compromising their mechanical properties and aesthetic characteristics.

The dew point meter is a helpful tool to measure the dew point. Simply put, dew point is the temperature at which the air reaches saturation and water vapour condenses into liquid form. Consequently, in several industrial applications, knowing the dew point is useful to maintain optimal drying conditions, especially when handling moisture-sensitive materials such as plastic granules.

The operation of the dew point meter exploits precise physical principles and relies on several integrated technologies. The measuring process involves various steps. Let’s see them all.

1. Temperature and humidity measurement. The various unit sensors detect the amount of water vapour present and the temperature of the air leaving the dehumidifier at a specific time.
2. Dew point calculation. Using specific formulas and algorithms, the tool calculates the temperature at which the moisture in the air condenses, that is, the dew point.
3. Data visualisation. The data are shown on a digital display to allow real-time monitoring.
4. Process control. The most advanced dew point meters integrate into industrial process control systems, allowing automatic settings to maintain optimal dehumidification conditions.

As we said at the beginning, measuring the dew point value allows monitoring the performance of the drying system. This value can be checked in the following ways.

• Under working conditions. In this case, the dehumidifier works regularly, as part of a real drying process of the plastic granules. The measurements taken allow controlling both the efficiency of the dehumidifier and the effectiveness of the drying process.
• Vacuum, to check the efficiency of the dehumidifier only.

But a single measurement is not enough for a complete check. It is necessary to measure over an extended period of time to define the humidity trend over several hours, sometimes several days. 

Furthermore, the type of dehumidifier influences the duration of the measurement considerably. With VISMEC dehumidifiers, control is simple, because our machines operate smoothly and consistently: as a result, the measurement quickly shows the true dew point value, and it will not deteriorate with time. 

Vismec portable dew point meter

A Vismec portable dew point meter can be used with the different types of dehumidifiers that our company designs and manufactures. Available with various power systems, it ensures versatility and ease of reading. 

The logger plotted on the screen has an adjustable width and allows viewing the trend of the parameters over a desired, longer or shorter period of time. It is also possible to save the collected data on a USB flash drive for various uses: for example, documents filing in accordance with the company's quality management system.

Listed below, the main technical characteristics of the dew point meter offered by our company:

• device equipped with an integrated volumetric suction pump to ensure a correct and constant sampling flow;
• connection to the dehumidifier via Teflon monotube;
• great versatility, that is, the portable dew point meter is also suitable for small or pneumatic dehumidifiers;
• large 7’ touchscreen that makes it easy to read the data, thanks to its sharpness and illumination;
• available in rechargeable battery-powered version with integrated battery charger, or without batteries with direct power supply;
• user-friendly graphic user interface in six languages;
• settable dew point limit and sampling rate;
• data collection record with possible on-screen verification;
• USB port for downloading data and software updates;
• total auto switch-off in case of low batteries and “battery safe” system to keep them efficient.

Effective plastic granule drying is crucial to ensure quality to the products your plastics processing company offers. In this context, Vismec portable dew point meter is a reliable, advanced and functional device that allows an accurate monitoring of the performance of installed dehumidifiers.

Want to know more? Contact our team.

by Laura Franceschi

Vismec at PLASTPOL 2024, plastics and rubber processing trade fair in Kielce, Poland

From 21 to 24 May 2024, Vismec is exhibiting at PLASTPOL 2024, the international plastics and rubber processing exhibition in Kielce, Poland.

PLASTPOL Expo is Central and Eastern Europe's most important event for the industry. Six hundred companies from all over the world will present their innovative solutions for the plastics industry.

Vismec will be present at the event at the stand of our Polish partner Kanitec. Come and visit us: we are waiting for you at HALL E, STAND E25 - E26.

by Laura Franceschi

Vismec at FIP 2024, the international showcase in the plastics industry in Lyon

From 4 to 7 June 2024 Vismec will be at FIP - France Innovation Plasturgie: the event will be held in Lyon, France.

The trade fair is one of the most important international showcases for companies in the plastics industry.

This year, the focus will be on the sector's energy, regulatory and environmental challenges: an opportunity to highlight the advanced energy-efficient solutions that our company offers.

Visit us at the Eurexpo complex in Lyon: we look forward to seeing you at stand 105-H32.

by Laura Franceschi

Big bag emptying stations for industrial granule storage: Vismec solutions

In this article, we are going to introduce big bag emptying devices used in the industrial storage of granular materials.We will start by explaining what a big bag emptier is and what its function is. Then, we will focus on the role of these devices in the transport and storage of plastic granules, and we will present Viper, the latest solution by Vismec in this sector.

Big bag emptying solutions: what they are and what they are used for

Big bag emptier series are equipment that companies use in operations involving the transfer and industrial storage of bulk materials, such as plastic granules. But what structure do these devices have, and how do they work?

A big bag emptier, as its name suggests, is a machine designed to efficiently empty flexible containers commonly known as “big bags”. These are precisely large containers companies use for storing powders, granules or more compact materials.

Keep their contents safe and controlled is important, especially in industries that require the transfer of large quantities of bulk material. The plastics processing industry is among the sectors needing this care, in which it is essential to properly store, handle and transfer plastic granules during the production process. Here the big bag unloaders come into play.

The operation of the big bag emptier is based on a mechanism that allows lifting the big bag and empty its contents in a controlled way. This process takes place through the use of conveying systems that regulate the flow of the granules, ensuring an accurate and waste-free transfer.

The careful design of the big-bag emptying stations allows their structure and operating mechanisms to the specific needs of the companies. Vismec manufactures the big bag emptying stations according to these criteria, to ensure an efficient operation and optimal material management, as well as maximum flexibility.

In the next section, we will go further into the operation of big bag emptying stations for the storage of plastic granules. We will look at the main elements of these devices and present Viper, our company's latest solution.

Big bag emptying stations in the storage of plastic granules

Big bag emptying stations consist of several components that work together to perform the emptying process accurately and safely. Here are the main ones.

• Lifting and support system designed to lift the big bag into a vertical position.
• The big bag is placed on a stable support platform equipped with locking devices to ensure that it remains firmly in place during the emptying process.
• Opening and unloading system to open the bottom or neck of the big bag in a controlled way, allowing the plastic granules to flow evenly and regulated to the conveyor system below. Different technologies used to open the big bag include cutting devices, butterfly valve systems controlled by electric or pneumatic motors.
• Conveying system that regulates the movement of plastic granules from the big bag to the desired destination points, which may include feed hoppers or other transfer units. 

All these features are particularly advanced in Viper, Vismec new big bag emptying device. Viper is designed and manufactured to empty big bags, boxes or Octabin containers. It can be used to handle solid plastic material in the form of granules with a size of about 2 / 5 mm.

Here are its main technical features:

• fixed painted carbon steel gantry-shaped frame;
• carbon steel mobile carriage;
• stainless steel moving probe to detect the material level in the big bag;
• stainless steel vacuum pipe to activate the plastic granules pneumatic conveying process.

Viper allows big bags or Octabin containers to be emptied automatically, thanks to a vacuum unit consisting of a receiver and a vacuum generator, connected to the vacuum inlet pipe itself.

The machine is designed to empty containers with a capacity of 1500 kg or more, of variable shape and size. Thanks to proper customisations and special probes, upon request, Viper can also be used to handle other types of solid materials such as regrind or powders.

During the conveying process, it is essential to monitor the granule flow to avoid overloads or interruptions. That’s why the parameter regulation is very important to ensure an efficient performance and must be carried out at any change of materials, containers and bags.

This is why the Viper big bag emptying station is equipped with a PLC control system that allows you to control and modify the operation settings without stopping the machine. Controllable elements include, for example, the settings of mobile carriage parameters, probe parameters, activation of the automatic vibrator.

Therefore, choosing Vismec big bag emptiers means having access to machines that can be precisely controlled, ensuring that operations are managed efficiently, saving time and avoiding downtime and material waste. 

Want to know more? Contact our staff.

by Laura Franceschi

Dust collector for plastic granules: what it is, how it works, Vismec solutions

The industrial dust collector is one of the technologies used by the plastics industry to ensure efficient production processes and quality results. Dust collectors help both to optimise processing and preserve the characteristics of the plastic granules used as raw material.

In this article, we are going to describe the general operation of a dust collector, focusing on its role in granule conveying and treatment processes. In addition, we will talk about the Vismec dust collectors for plastic granules, their characteristics and advantages for companies.

Dust collector: what is it?

An industrial dust collector is generally a device designed to remove dust particles, residues and other impurities from a variety of materials.

Such materials also include plastic granules. As we said, the presence of dust and other impurities can compromise the quality of the granules and negatively affect the processing result. In other words, residual dust on the granules can cause serious quality problems in the final product, which, for example, may show black spots or flow lines.

Having explained the role of a dust collector in production processes, let us now present its basic operation.

1. Material is introduced into the dust collector through a conveyor system.
2. The material is exposed to a controlled air flow. Depending on the characteristics of the dust collector, this flow can be combined with the mechanical action of vibrations or centrifugal forces. However, as we will see in the next section, Vismec dust collectors use an alternative and more effective method, in which the presence of compressed air is limited or absent, and the dust removing action implemented by means of static electricity.
3. These processes separate dust particles and other impurities from the plastic granules. As a result, the material is ready to be used in various plastic processes.

Besides preserving material quality, the dust collector helps to reduce downtime, lower operating costs and increase productivity and efficiency.

The effectiveness of a dust collector for plastic granules depends on several factors, including the design of the device, the used dedusting system, and the nature of the impurities. Consequently, the careful design of the dust collector with specific technical measures, allows the desired results in terms of quality to be achieved.

In the next section we are going to present in detail the dust collectors offered by Vismec, their features and benefits.

Vismec dust collectors for plastic granules

The dust collectors we offer to plastics processors are designed to guarantee process efficiency and the highest quality result. The operating process we have described takes on specific characteristics in Vismec dust collectors. 

In particular, the AIR version, which represents the latest generation of dust collectors, operates as follows:

• in the material supply, virgin or regrind material is conveyed to the dedusting unit;
• the non-contact type air paddle, without contact between the air stream and the granules, conveys a certain amount of material in combination with the sensor signal;
• the high-pressure applied ioniser regulates the static electricity charged in the materials by bringing it below a certain voltage;
• the air amplifier generates a vacuum by emitting a small amount of compressed air; so the force of this vacuum attracts outside air, forming a vortex in the duct;
• the damper (air filler) lowers the vacuum in the duct, supplying outside air, to prevent materials from being easily discharged; it comes into operation when small, light materials are used;
• the light dust contained in the material is separated from the rising air stream.

The dust collector is part of the conveying processes of plastic granules and helps to maintain their effectiveness. 

This can be better explained by considering that this type of machinery must always be placed directly on the press in order to obtain a completely dust-free material. In fact, a further conveying of material could generate new residues: the direct installation on the press, on the other hand, preserves the plastic granule from the risk of other contaminations.

As mentioned, one of the most noticeable features of the dust collectors offered by Vismec is the use of static electricity to remove dust from the material, strongly limiting the action of compressed air. Being able to totally remove particles and residues from the granules, a better performance is achieved. 

In the air type model, as we have seen above, a small amount of compressed air is still injected into the supply pipes to generate the pneumatic vacuum that enables the granule conveying to start. However, in order to avoid any contamination, even in this case there is no contact between the compressed air and the dedusted material.

Guaranteeing the complete absence of dust in the polymer at the end of the process, our dust collectors are particularly suitable for advanced or high-tech production sectors. These include, for example, the medical sector, the production of spectacle and contact lenses, or optical covers, the consumer electronics sector, such as electronic housings or similar.

Would you like to find out more and learn more about what our dust collectors can offer to your company? Contact the Vismec team!

by Laura Franceschi

Vismec at NPE 2024, the world's largest plastics trade show

From May 6-10, 2024, Vismec will be at NPE 2024, the world's largest trade show dedicated to the plastics industry. The event has always had a specific focus on innovation and will be held in Orlando, Florida, at the Orange County Convention Center.

The NPE show is held every three years and has become a must-attend event for companies in the industry: more than 2,000 companies will participate in this edition.

Vismec will take the opportunity to present the most innovative of its products. It will also be an opportunity to let industry professionals know more about the activities of our evolving U.S. headquarters.

Come visit us at the Orange County Convention Center: we look forward to seeing you at BOOTH booth S22089!

by Laura Franceschi

The cyclone filter in Vismec centralised conveying systems

The cyclone filter is one of the key components in vacuum conveying systems for plastic granules. Its function in Vismec conveying systems, combined with the blower or hook pumps, allows to effectively and efficiently manage the flow of granules while preserving the quality of the material.

In this section we are going to present the characteristics of the cyclone filter in more detail, and then we will focus on the specific features of the filters proposed by Vismec for centralised plastic granule conveying systems.

Cyclone filter: function in granule conveying systems

The cyclone filter and side channel blowers are complementary elements in conveying systems. We have already seen it in the article dedicated to the different types of granule conveying systems and in the presentation of Vismec products for conveying. Now we are going to have a closer look at this topic, focusing on the cyclonic filter.

A vacuum conveying unit works by generating a pneumatic vacuum using side channel blowers or hook pumps. The cyclonic filter integrates the action of these devices, keeping the air flow clean and preserving the quality of the plastic material. 

Let’s see in more detail.

• Side channel blowers compress the air and generate a negative pressure. The conveying system exploits the pressure difference to convey and suck the plastic granules in, throughout the ducts of the feeding system. Usually, side channel blowers are suitable for applications where a moderately high pressure is required.
• Hook pumps, as an alternative to blowers, generate a vacuum using the action of rotating lobes. They can handle heavier materials and produce a higher pressure, so they are used in situations requiring higher suction power.
• The cyclonic filter is used to separate solid particles such as dust or plastic granules waste from the sucked air stream.

The special design of the system, as we have seen in a previous article dedicated to the cyclonic filter, exploits centrifugal force to separate heavier particles from the air stream. This helps prevent the accumulation of debris and impurities, ensuring a more efficient operation.

In the next paragraph, we will present in detail the functions and technical features of Vismec cyclonic filters in the centralised conveying systems that our company designs and manufactures.

The cyclone filter in Vismec centralised conveying systems

The cyclone filter is a key element in the operation of Vismec centralised conveying systems. In fact, its action makes the process more efficient and keeps the plant clean and fully functional, helping to extend its operational life. It also helps to safeguard the quality of the transported granule.

The three-sector filter system guarantees an optimal process outcome. 

Depending on the customers needs, the cyclonic filter can be used in different options, which we will examine below.

• It can also be supplied in a double version, with manual or automatic switch. The double switch is used to avoid downtime or loss of production, e.g. when the filter is clogged or during maintenance operations.
• It also provides for a Softstart or Inverter options: both systems are designed to save energy, increase the life of the system, and avoid powder or “angel hair” formation thanks to the possibility of controlling the conveying speed. In particular, the Softstart mechanism provides for a gradual start of the vacuum unit, with less energy consumption during starting phase.
• In case of high temperatures materials conveying, it can be supported by a special cooling mechanism that protects structure and functions of the vacuum unit.

A pressure switch is also available as an accessory for the filter: the instrument monitors the internal pressure and prevents clogging.

Vismec cyclone filters can also be supplied in a stand-alone configuration. In this case, the side-channel blower is also presented as a separate device, notwithstanding the functional integration between the two elements of the vacuum unit. Furthermore, on request, the conveyor system can be equipped with a back-up blower, which further contributes to maintaining operational efficiency.

As previously mentioned, depending on the needs of the companies and the characteristics of the conveying process, the technical requirements of the blowers, which are available in single, dual or triple stage configurations, also vary. For long-distance conveying systems requiring higher productivity, side blowers can be replaced by hook pumps if necessary.

Do you want to know all the advantages that our granule conveying systems offers to plastics processors? Contact us: our technical team is always available for you.

by Laura Franceschi

Vismec at MECSPE 2024, the International Fair for the Manufacturing Industry

From 6 to 8 March 2024 Vismec will be at MECSPE, the International Fair for the Manufacturing Industry. The event will be held as usual in Bologna and has reached its 22nd edition this year.

Come and visit us at Hall 36, Stand E18!

Vismec products at MECSPE 2024

This year we will bring some of our flagship products for the dehumidification and conveying of plastic granules to the fair. In particular, visitors will be able to get to know:

• Drycube, a flexible and independent wheel dryer. Drycube combines the efficiency of a rotor dehumidifier with an integrated pneumatic conveying system, a dehumidification hopper receiver, an IMM receiver and all related accessories. Advanced and efficient, it allows automatic setting of the dehumidification process parameters.
• Venturi feeder, a feeding system for transporting materials such as master batches or granulated additives. Compact and completely made of stainless steel with a cast body, it allows the conveying of granules in a continuous flow with the possibility of adapting the air power through a pressure regulator.
• FW 50 Touch control system. It manages up to 48 transport stations per empty line with possible emergency reserve system. FW50 is integrated with the universal OPC UA interface, for automatic and efficient supervision of the production system. Also available in touchscreen version with remote control

Would you like to know more? Come and visit the Vismec stand: Hall 36, Stand E18!

by Laura Franceschi

Plastic granule conveying: types, alternatives and Vismec systems for centralised transportation

In the plastics industry, efficient granule conveying ensures smooth production operations. Companies in this sector know how important this phase is to optimise costs and time and preserve the quality of the material. Thus, in this article, we will present the different systems for conveying granules. Then we will focus on the solutions proposed by Vismec and explain their advantages.

Conveying of plastic granule: types and alternatives

The conveying of plastic granules can be managed in different ways. Let’s present them below:

• Manual conveying. This is the most traditional method using manual handling and emptying of sacks. It does not require specialised manpower and has low labour costs. However, it requires longer times and exposes to the risk of waste, material contamination and safety risks.
• Mechanical conveying. It involves the use of mechanical systems to facilitate the movement of the granules: augers, rigid or flexible spiral feeders, conveyor belts. It does not require ordinary maintenance of the filter, which is not present, but entails problems of cleaning and wear of the mechanisms. Moreover, it can only be used over limited distances.
• Pressure conveying. It uses compressed air pumps to push the plastic granules through a system of pipes and containers. It offers a higher transport speed, with a capacity of more 1000 kg/h. In addition, it can be operated through stable or mobile conveying units. However, it usually involves the presence of single stations: a multi-station configuration is only possible with the use of special diverter valves. Furthermore, the air is discharged through a cyclonic filter (or other filtering system) that requires periodic maintenance.

A different and more efficient mechanism is the vacuum plastic granule conveying system: we will talk about it in the next paragraph, presenting the innovative solutions offered by Vismec. 

Vismec solutions for vacuum conveying of granule

The vacuum granules conveying system uses differential pressure to move plastic granules through a pipeline system. This method is based on the creation of a partial vacuum generated by a special pump inside the pipes. The pressure difference between the suction point and the destination point of the granules allows the conveying of the material.

Vismec offers several solutions for vacuum conveying. Below we will present the main ones, focusing on the centralised conveying system

• Vismec feeding kit: connected to the drying system, from which it is controlled, it offers an integrated drying/ conveying and allows connecting up to two stations with receivers. It can be installed near the drying system or on its frame, but manages a limited flow rate of plastic granule (100 kg/h) over short distances. These limit can be crossed by integrating the feeding kit with a VB system. However, the connection remains limited to two receiver stations.  
• Single-phase feeder: it entails a reduced initial economic investment and enables automatic filter cleaning, reducing time and costs for maintenance. It is also equipped with an automatic alarm system that signals the exhaustion of material.  
• Conveying by Venturi system: independent compressed air feeder for transporting materials such as masterbatch or granule additives. Compact and reliable, it can also be installed on top of a drying hopper and is suitable for low throughputs. It allows a continuous granule conveying with the possibility of adapting the air power and transport speed through a flow regulator. It ensures an accurate separation of powders thanks to the unique cyclonic vortex.
• Small three-phase centralised systems: the conveying mechanism becomes more articulated and involves a vacuum system with centralised self-cleaning filter and bypass valve, side channel blowers and a 4.0 control system of the different stations. The material flow is unlimited and the system can handle up to 2, 2,4 +4 or 9 stations.

Vismec also designs and manufactures large centralised conveying systems. They are more articulated feeding systems that allow the rapid, efficient and controlled conveying of dried plastic granules.

These systems represent the evolution of the smaller systems we have presented so far and incorporate some of the most innovative solutions developed by Vismec:  

• FW50 control system manages up to 48 transport stations per vacuum line, with possible emergency stock system. Now it is also available in a touchscreen version with remote control and with three different solutions: magnet, table-top and wall-mounted.
• integrated Vismec Dryfeed dehumidifier delivers dry air to prevent moisture absorption during transport;
• the system can be integrated with a vacuum unit or an emergency blower to avoid the risk of downtime machine;
• receivers of the different stations are made of stainless steel, in different sizes and equipped with an optimised filter system and discharge, inspection and cleaning mechanisms.

Vismec large centralised conveying systems can be integrated with various accessories and provide several advantages to the companies that choose them. In particular, they make it possible to control and optimise the logistics of plastic granules thanks to integrated supervision and management systems, and they concentrate the filtration phase in one point, keeping the production environment clean. They also reduce energy consumption, and time and costs for maintenance, resulting in savings for the company.

Do you want to know how they work in detail? Contact our technical team.

by Laura Franceschi

Plastic dryer: how to choose it

Choosing the right plastic dryer (also called plastic dehumidifier) is crucial for plastics processors. In this article, we will explore the elements that influence the drying process and look at the different types of dehumidifiers. Then we will present the innovative Vismec rotor dryers.

Plastic dehumidification: the criteria

Effective plastic granule drying preserves material properties, improves aesthetics, reduces processing time and the risk of faulty production.

However, the result of dehumidification may vary according to different elements that depend on the characteristics of the plastic material, external factors and the conditions under which the drying process takes place.

When subjected to heat, thermoplastics, including plastic granules, become malleable. They are divided into hygroscopic thermoplastics, with both internal and external moisture, and non-hygroscopic thermoplastics, with moisture limited to the surface. This is an important first distinction when choosing the most suitable dryer for a plastics processing company.

However, there are other factors that affect the process result. Here are the main ones.

• Dew point: the temperature at which the air becomes saturated with moisture. Accurately measuring the dew point prevents condensation during drying.
• Set temperature: affects the performance of the dehumidifier and can also have an impact on material properties, e.g. for advanced materials such as bioplastics.
• Drying time: when it is too long, it carries the risk of thermal, physical or chemical degradation of the material. In addition, it has an impact on process organisation.
• Air flow rate: when it is adjustable according to material specifications, it allows a more accurate and efficient drying.
• Material type and shape: influence the specific drying used strategies.
• Initial and final humidity. To correctly set the drying parameters, it is important to both measure the moisture present in the material at the beginning of the process and to determine the desired final moisture content.

The choice of the ideal plastic dryer has to be determined by the balance between these factors.

Characteristics of different types of plastic dryers and Vismec solutions

We will now very briefly present the different drying methods. Then, we will focus on the features and advantages of the rotor dryers designed and manufactured by Vismec compared to other solutions.

Let's see what systems are available to companies that process plastic materials.

• Hot air ovens: an expensive manual system, which allows small quantities of material to be dehumidified, provides a limited control over the process and ultimately does not guarantee optimal results.
• Hot air dryers: they provide continuous drying and can be installed either on board or beside the machine. However, they have high energy costs, are influenced by environmental conditions and are only suitable for non-hygroscopic materials.
• Compressed air dehumidifiers: they also allow continuous drying, can be installed beside the machine and require little space. However, they are only effective for small production runs, generate high indirect costs and process control is limited.
• Microwave plastic dryers: they expose plastics to risks related to material degradation. They are not suitable for industrial use.
• Infrared dehumidifiers: they permit continuous drying and accelerate the process. However, they are only applied to large production runs and involve high costs and consumption. In addition, their control is complicated and there is a risk of contaminating the material.
• Vacuum dryers: the continuous drying process reduces process time and does not subject the material to any harmful stress. In addition, energy consumption and maintenance time are limited. However, this system is only suitable for small production runs and has high purchase costs.
• Molecular sieve dryers: they also allow a continuous drying process, can be installed on board or beside the machine, and are not subject to limits on production quantities. However, their dew point is inconstant, and the molecular sieves degrade very quickly, so they must be often replaced.

Vismec rotor dryers have different and innovative features compared to the solutions described so far. The wheel, the pivotal element of the system, rotates thanks to a stepper motor and air passes through it in the 3 phases that we will see below.

• Dehumidification: the air is dried and then passes into the heating chamber, which enables it to reach the desired temperature. Next, the hot, dry air dries the plastic granules.
• Regeneration: The second section of the wheel is crossed by hot air generated by a chamber and a dedicated blower.
• Cooling: the wheel is cooled and then returned to the first drying section.

The advantages of the Vismec rotor dryers are many, starting with the efficiency of the process. The machine is more compact and has reduced maintenance requirements. In addition, the traditional molecular sieves are replaced by a wheel with a special honeycomb structure that is much stronger.

Other advantages include:

• drying temperature of up to 180°C without using cooling water;
• constant and adjustable dew point down to-50°C;
• energy consumption reduced by 40 % and monitoring from display;
• air flow regulation;
• preset and adjustable reference parameters with Smart mode system;
• MPM - Material Protection Management, a system to protect material from over-wetting and degradation;
• SLS - Safety Loading System, a safety system to prevent non-dehumidified material from reaching the processing machine.

The features and benefits of Vismec rotor dryers are many more than we have presented. This makes them effective and adaptable to the different companies needs. Contact our team to learn more.

by Laura Franceschi

Industrial storage of plastic granules

In the plastics processing sector, accurate industrial storage of granules helps to maintain efficient production processes. In fact, storage integrates effectively with transport and receiving systems, optimising material management.

Furthermore, a good storage system, especially in particular situations, helps to preserve the physical characteristics of the raw material. This element is important, especially when its characteristics have an impact on the quality of the finished product.

In this article, we will talk about the main needs that companies have to face in industrial granule storage. Then we will present the solutions that Vismec proposes, highlighting their added value.

Industrial storage of plastic granules: challenges and solutions

Plastics processing companies are facing more than one challenge in the storage of plastic granules.

The common need is for solid storage containers that can adapt to different load volumes and weights. As we will see in more detail in the next section, the solutions proposed by Vismec for industrial storage are flexible in terms of:

• Size and capacity. They range from small 100-litres cylindrical containers to large external silos whose volume can reach up to 200 m3.
• Manual or automatic loading systems.
• Other structural elements. Like the loading and unloading systems we mentioned above, these can differ in type, diameter and capacity, as well as in the additional mechanisms available to facilitate operations.

Having versatile solutions is a key element in aligning the characteristics of industrial granule storage systems with the different needs of companies. This is precisely why, among its products, Vismec offers modular containers or other types of adaptable structure, including options and accessories.

As mentioned at the beginning, plastic processing companies must also consider the need to preserve the characteristics of the material. We have already covered this topic from several points of view in various articles on our blog. For example, when we explained what dew point is and how it applies to drying systems, or when we talked about bioplastics. 

In the context of industrial storage, the topic becomes relevant when talking about the large outdoor silos used to contain plastic granules. In this case, it is important that water does not condense inside the silo, in order to avoid a contamination of he material. Vismec answers to all these needs with efficiently and strategically designed solutions.

Vismec systems for industrial storage

Each of the containers that our company offers for the industrial storage of granules is designed to meet different and flexible needs. Here are the main solutions we offer:

• Cylindrical storage bins: designed to collect and transport bags of plastic granules without risk at the company's production site. They are solid storage systems, entirely made of stainless steel and available in different sizes. They can be integrated with one or two suction probes and with a bag-breaking grid on request.
• Square storage bins: more sophisticated and performing than cylindrical containers, they are already designed for mounting a receiver on each of the two sides. In this way, the product facilitates integration with Vismec granule transport systems. In addition, the suction valve with adjustable air flow simplifies the unloading of the container.
• Big Bag Station with integrated big bag emptying system: its telescopic structure makes it suitable for emptying bags of different sizes. The bag is inserted into the frame of the big bag station via a suitable lifting system. Then the stored plastic granules are conveyed to the big bag emptying system designed by Vismec, connected to a suction valve with one or more outlets available in different diameters.
• Indoor silos: silos with variable volume, from 10 to 80 m3, made of aluminium or steel. They can be filled using a standard vacuum conveying system or with a pressurised mechanism, which is much faster.
• Outdoor silos: large silos for outdoor use, with a volume that can reach 200 m3, also in the double silo solution. All silos have a filling pipe, a discharge filter and access and inspection mechanisms that guarantee maximum safety for operators.

In the last case, as already mentioned above, use in an outdoor environment makes it necessary to prevent moisture build-up in the silo. For this reason, Vismec provides a drying system on request: the dry air produced keeps the granules dry, preventing the material from deteriorating.

Each of the solutions proposed by Vismec for the industrial storage of plastic granules meets specific requirements in terms of sizing, material handling mechanisms, and integration with other systems. Contact our team: we will be able to advise you on the most suitable storage system for your company.

by Laura Franceschi

Dew point: meaning and applications to plastic dehumidifiers

In various industrial fields, including plastics dehumidification, the concept of dew point and its meaning are important. In fact, the dew point is a physical condition to be carefully considered for companies operating in sectors where humidity can influence the quality of processes, the material used and results.

In this article, we will go into the technical meaning of the term, presenting the impact of dew point in the industrial sector and highlighting its applications in plastic granules drying process.

Dew point: meaning and general applications

To better understand the meaning of dew point, let us start from its basic definition. Basically, the dew point is the temperature at which the air becomes saturated with water vapour, resulting in the condensation of moisture in the form of water droplets.

The quantity of water vapour that the air can retain before becoming saturated and initiating the condensation phenomenon increases with increasing temperature. Consequently, a cubic metre of air at a lower temperature requires less water to reach saturation. For example:

• 1 kg of air at 20°C becomes saturated with 14.7 g of water;
• 1 kg of air at 3°C becomes saturated with 36.6 g of water.

Thus, the temperature at which the air reaches the saturation point corresponds to a certain quantity of water present in it. Consequently, this temperature, known as “dew point”, in turn becomes an indication of how much water is contained in the air when water vapour condenses.

What are the practical implications? In industry, dew point has a direct impact on production processes, the quality of materials used and final products. In fact, humidity-sensitive materials such as plastics can undergo undesirable changes.

For this reason, an accurate control of the dew point is very important: the careful measurement and management of this parameter allows preventing condensation by activating drying processes when necessary. In this way, processed and transformed materials can comply with the required parameters regarding the tolerated quantity of humidity.

The dew point finds application in various industries. For example, monitoring it in the food and pharmaceutical sectors is crucial to preserve the quality and integrity of products. The same goes for electronics, where humidity can affect devices performance.

Looking specifically at the plastics processing sector, the issue is similar: keeping plastic granules within the expected humidity parameters prevents defects in the appearance and properties of the plastic product. We will see this in more detail in the next section.

Applications in plastic granule drying

Understanding the meaning of dew point and the correspondence between temperature and the amount of water in the air has significant practical implications. It is particularly important in the processes used to maintain polymers at the right humidity level by drying.

Plastics naturally retain humidity. However, depending on the type of material, the methods are different:

• in non-hygroscopic plastic materials, humidity stops at the surface;
• in hygroscopic plastic materials, on the other hand, humidity is present on the surface, but also penetrates inside the plastic granule.

If the humidity is not removed or kept within the allowed tolerance limits, the final product resulting from the granules processing could be opaque or streaked, smudged or bubbled. Then, from a functional point of view, the presence of residual humidity could worsen the mechanical properties of the object, deform it or lead to uneven wear over time.

To avoid problems of this type, the plastic granule is passed through a stream of hot air during the drying process. The initial explanation about the meaning of the terms “dew point” and how the phenomenon works makes us understand why.

In fact, the air can retain humidity until it becomes saturated. As we have seen, this capacity increases with increasing temperatures. Therefore, the humidity and temperature of the air used to dry the plastic granules in the drying process can be adjusted according to the result to be achieved.

When we design drying systems, we take all these parameters into consideration. In addition, our systems have a further advantage: they allow for very significant energy savings which reach up to 40 per cent and more.

This element makes the process more efficient and sustainable in terms of consumption and use of resources. In other words, Vismec dehumidifiers ensure excellent performance: top quality results and reduced energy costs.

Our drying systems include:

• Drycube, which enables perfect drying and efficient transport of the technical plastic granule. Drycube can reach a drying temperature of 180°C and a constant dew point, adjustable down to -50°C.
• Drywell, a compact high performance dehumidifier. Again, drying temperature and dew point are adjustable up to 185°C and -50°C respectively, depending on the type of material and its condition.
• Dryplus, a floor standing dehumidifier used mainly in on-board installations.

In this article, we have presented just a few of Vismec's solutions for the drying of plastic granules. 

Nevertheless, we can provide you with a much wider range of machinery and accessories, according to your company's needs. 

Want to know more? Contact our team.

by Laura Franceschi

Plastic dehumidifier: what it is, what it is used for, Vismec dehumidifiers

The plastic dehumidifier plays a fundamental role in the production processes of companies involved in transformation of plastic materials.

But what exactly is it and what role does it play in this field? We will see in this article, exploring its characteristics, operation and practical applications. Finally, we will discuss the advantages of the dehumidifiers offered by Vismec.

Plastic dehumidifier: operation and applications

Plastic dryers are machines designed to eliminate the moisture in plastic granules. In fact, the presence of moisture can compromise the material features and, as a consequence, the quality of the result of plastics transformation processes.

Therefore, the use of a plastic dehumidifier becomes essential to ensure the efficiency and reliability of the production process and the quality of the final result.

The operation of dehumidifiers is based on a condensation process, which can be summarised as follows:

• Initially, the moist air contained in the plastic granules is sucked into the device. Then, the air flow passes through a series of heat exchangers, where it is cooled below its dew point.
• In this way, the moisture present in the air condenses into liquid form and can be eliminated. This process returns the granule perfectly dry, that is, in an optimal condition to be used in plastic processing.

In this production process, the use of a high-performance and reliable plastics dehumidifier brings several advantages.

• First, it helps to maintain the stability of the physical and mechanical characteristics of the polymers, avoiding alterations due to humidity.
• Consequently, it reduces the risk of defects or deformations in the finished product and the possible negative impacts on performance when such a product is used.

In some fields, such as medical, food or bioplastics, these characteristics are particularly important, because they are also linked to consumer health, safety of use, and maintenance of high performance standards.

Similarly, the use of optimally dehumidified polymers as raw material contributes to the good aesthetic of the finished product. This element is significant in sectors such as design, construction, production of components for consumer electronics, automotive sector.

In the next section, we will present wheel dehumidifiers produced by Vismec, and explain their features and advantages.

Vismec plastic dehumidifiers

The plastic dehumidifiers we produce provide efficient dehumidification combined with great flexibility. In addition, they save energy, reducing consumption and costs.

These advantages arise especially from the possibility of adjusting the dew point of the air flow. In fact, the operating mechanism of our machines allows calibrating the dew point, keeping it constant over time, regardless of any external ambient condition.

Each Vismec plastic granule dehumidifier adds to this feature additional adjustment, like temperature monitoring and control mechanisms. Let’s see them in particular.

• Smart Mode, that controls the temperature of the return air, automatically adapting the process to the production needs of the client company.
• MPM (Material Protection Management), that guarantees the integrity of the material, protecting it from excess dehumidification. This achievement is important to ensure maximum quality and is possible by monitoring the loading mechanism and the return air temperature.
• SLS (Safety Loading System), that prevents still wet plastic granules from reaching the production machinery, thanks to accurate control of the dehumidification time.

The latest proposal in the range of Vismec wheel dryer for plastics is Drycube. Drycube combines the efficiency of a rotor dehumidifier with an integrated pneumatic conveying system, a receiver for the dehumidification hopper, a receiver for IMM and all related accessories.

The conveying of hot materials takes place in a closed circuit: hot dry air is used to transport the material to the processing machine, and this particular technology allows the polymer to be kept stable away from changes in temperature and humidity from the outside air.

DryCube enables the automatic setting of the parameters of the drying process and continuously monitors the operations to achieve the ideal conditions and protect the material from over-dehumidification. It is particularly suitable as a stand-alone flexible dehumidifier to be placed on the side of the processing machine. 

When the dehumidifier is positioned next to a plastics processing machine (usually a press), this mechanism allows a greater flexibility and speed of use, reducing processing times. 

However, the Vismec product range for dehumidification is much broader and includes machines, control and measurement systems, and accessories. If you want to learn more and choose the most suitable solution for your company? Contact our team: we will be happy to support you.

by Laura Franceschi

Proportional valve: operation and advantages in conveying plastic polymers

A proportional valve is a simple mixing element. It is used in industrial automation and engineering applied to system for conveying bulk materials by means of an air flow, generally called pneumatic conveying systems. In this article we will have a closer look at what it is, its applications and the advantages of Vismec proportional valves for the conveying plastic granules.

Proportional valve: general operation

The name “proportional valve” comes from the fact that it is used to create a proportion between two different types of material. This name is improper in this field, because in engineering it is usually referred to as being a valve that is able to change the flow rate of different types of flows proportionally to the control signal received.

Thus, proportionality is understood as the relationship between the control signal which varies in a certain range of values, and the opening position which is variable in a certain range too. These devices find application in various sectors, including the automotive, aerospace, chemical and energy industries. In these areas, for example, they can be used to:

• control pressure and flow rate of fluids in hydraulic systems;
• ensure precise dosing of liquids in chemical processes and other processes;
• regulate the speed in automatic transmission systems of vehicles.

In the case of proportional valves used in pneumatic conveying, the proportion between two different materials is not achieved through a continuous variation of a valve body that continuously modulates two flows. It is, instead, achieved by the proportion between the conveying time of a first material and the conveying time of a second material.

Thus, the proportional valves produced by Vismec allow the alternating suction, in a specific proportion, of two different plastic materials through the action of an air flow.   For example, it may be a virgin polymer and a regrind polymer, or two primary materials. The proportion between the two is simply set by indicating the percentage of one material compared to the other.

The versatility and precision of proportional valves make them very useful in various applications where handling of two materials belonging to the same granule receiver is required. For this reason, they are an essential component of the Vismec feeding systems for plastics processing companies. 

As we will see, the valves that we design and integrate into products for conveying plastic granules have specific characteristics that make them extremely functional. However, let’s start from the beginning by briefly explaining how this type of device works in general.

The proportional valve for bulk materials operates by means of two shutters which are able to block the flow of granules and hermetically seal the duct, in response to a command or control setting. This command controls the alternating opening of the valve stems, making it possible to create a ratio between two materials arriving at the same bulk receiver.

As we have mentioned, in the case of Vismec proportional valves, the material in transit consists of polymer granules sucked alternately according to an adjustable proportion. Looking at their use in conveying polymers for plastic processing, let’s focus on the proportional valves designed by our company.

Advantages of Vismec proportional valves for conveying plastic granules

The Vismec proportional valve, installed before or in correspondence with the plastic granule receiver, allows two different types of plastic materials to be sucked in alternately thanks to an air flow produced by the same vacuum generator. The valve switches the vacuum from a main pipe to a secondary one.

From the point of view of the process control, it is sufficient to set the percentage of the second material to manage the entire process. Through the control, it is possible to vary the percentages of the two components to obtain a loading proportion. To increase homogeneity, the materials can be alternated several times during the same loading cycle.

Let's have a look at the features that make VISMEC proportional valves unique on the market.

• The extremely clean one-piece precision-cast stainless steel design avoids the presence of stagnation areas. Therefore, the passage of granules is fluid and without interruptions or deposits. The stainless steel body greatly reduces wear due to abrasion caused by sliding granular materials.
• The inspection window is made of borsilicate glass that can withstand temperature changes and is wear-resistant to impacts of granules. The window has gaskets made of elastomers and noble polymers with high temperature resistance that are not in contact with the granules .
• The valve is controlled by a Vismec receiver and does not need a separate stand-alone control. Once the receiver has been properly parameterised, the valve is also adjusted accordingly, without the need for additional control points.
• The shut-off system consists of two stainless steel double-stage shutters, in which the first stage stops the granules and the second stage seals the pipe to enable the perfect transfer of vacuum into the second pipe. There are also moulded elastomer wear-resistant gaskets without frontal impact, to allow a perfect seal.
• The proportional valve is part of a pneumatic conveying system for polymer granules or for granules dehumidification and conveying. This plant is controlled by a system that uses the standard OPC UA protocol, allowing the automated management of processes with an advanced and intuitive human-machine interface. 

Let’s now see the advantages of the proportional valve.

• Simple adjustment. The device allows you an easy adjustment of two different materials to be used on the same polymer processing machine. This element is particularly useful when it comes to ensure an accurate proportion of materials in transit, as in the case of Vismec proportional valves.
• Wear-resistance. This type of valve is designed and manufactured to withstand wear and weather conditions. Consequently, it ensures a long operating life and reliable operation over time.
• Presence of control and signalling systems that facilitate the use of the device.
• Perfect closure of the valve and connecting components to avoid inefficiencies.

As we have seen, the Vismec proportional valves allow you to manage different functions and passages within the systems in a simple, rapid and automated way by a single control point. So, they allow companies that use them to simplify operations, optimise time and reduce consumption.

If you want to know in detail how they work and the other Vismec proposals for feeding and conveying plastic polymers, contact our team. We will be happy to evaluate with you the most suitable solutions for your company.

by Laura Franceschi

Gravimetric doser and volumetric doser: features and applications

The gravimetric doser and the volumetric doser are devices used in the industrial sector for the precise measurement and dosing of powders or granules. 

The two tools differ significantly in their measuring methods and in  their possible applications. We are going to talk about it in this article, also presenting the solutions proposed by Vismec for gravimetric and volumetric dosing.

Gravimetric doser and volumetric doser

So let’s start by trying to understand what the two devices are and presenting the differences between the gravimetric and volumetric dosers.

In the dosing process, the gravimetric doser measures the quantity of material by weight, thanks to an integrated scale that continuously measures the weight of the material. 

Consequently:

• doser weighs the material in real time and in a highly accurate way;
• device compensates for any variations in the density of the weighted material or environmental conditions;
• this precision is crucial in sectors such as the chemical, pharmaceutical and food industries, where the correct dosing of ingredients is essential for the quality of the final product.

Even in applications in the plastics processing sector which requires a high precision, the gravimetric blender ensures quality results. An example? The dosing of additives.

Instead, the volumetric dosing unit doses the material based on the occupied volume. This type of doser often uses a system of measuring chambers or tanks that fill and empty cyclically, dispensing a pre-established amount of material. 

Volumetric dosers are often faster than gravimetric dosers, but can be less accurate because they do not take into account variations in material density. As we will see in the next paragraph, the volumetric dosers that our company offers, on the other hand, allow the dosing of plastic granules while maintaining precision. 

A further difference between the two dosing systems concerns the calibration of the instrument:

• the gravimetric doser requires accurate initial calibration to ensure the accuracy of results over time;
• in the case of the volumetric doser, adjustments must be more frequent because the density of the material may vary. 

Additionally, gravimetric blenders are more suitable for materials that may compact or have a significant change in density during production.  

Thus, the two types of blenders have different operating methods. Vismec offers advanced and effective solutions for gravimetric and volumetric dosing, calibrated according to: 

• type of application;
• supported plastic processing;
• characteristics of the use environment.

We will present them more thoroughly in the next paragraph.

Products offered by Vismec for volumetric and gravimetric dosing

As we were saying, Vismec volumetric and gravimetric dosers allow accurate dosing of plastic granules and any additives. Each product has its own specific features, designed to best meet the needs of customer companies.

• The MGF gravimetric doser accurately measures the quantity of blended additive with the plastic material. The dosing unit features a high-precision automatic recalibration system, without the need for additional configurations.
• The WSB series doser is equipped with advanced control technology that allows accurate and real-time monitored mixing of the granules. The device fits on any moulding machine, even allowing the loading time of the plastic material to be adjusted.  
• Vismec volumetric dosers are also designed to support plastic injection or extrusion moulding machinery. The device is designed to withstand mechanical stress and vibration without compromising the precision of operations. In addition, the loss-in-weight volumetric dosing system allows the weight of the polymers to be constantly monitored, ensuring the optimum quality of the end result.

All products offered by Vismec for gravimetric and volumetric dosing, in addition to precision, have a common ability to facilitate machine maintenance and cleaning. Furthermore, the integrated control devices optimise dosing operations and allow the customer company to reduce material waste and associated costs.

Would you like to learn more about the dosing systems and other products Vismec offers companies in the plastics sector for polymer dehumidification, conveying and storage operations? Contact our team and tell us what you need. Together we will find the most effective solution for your company.

by Laura Franceschi

Vismec at Fakuma 2023, the International Trade Fair for Plastics Processing: 17 - 21 October, Friedrichshafen

From 17 to 21 October 2023, Vismec will take part in Fakuma, one of the world's largest trade fairs for plastics processing companies. The event, now in its 28th year, will take place as usual in Friedrichshafen, Germany.

About Fakuma

Fakuma is one of the largest international trade fairs in the plastics processing industry. This year, the event will attract more than 1,500 exhibitors to Friedrichshafen, a southern German town on the shores of Lake Constance.

Among the participants will be plastics processing enterprises, service providers and companies that, like us, produce machinery and auxiliary technologies for the sector.

Vismec will be exhibit at Fakuma 2023 in Hall B2, Booth B2 - 2220. For our company, taking part in the event means having the opportunity to present its products, especially the most innovative ones, in a market that is evolving ever more rapidly.

As an evidence of this, here you are some of the main topics that well be debated in conferences and conventions during the fair

• The challenge of digitisation and man-machine interconnection systems: such as the OPC UA protocol devices integrated in Vismec machines.
• Circular economy and the reuse of production waste. 
• Energy saving: an increasingly topical issue for environmental and economic reasons. From this point of view, all our products are designed and manufactured to maximize energy efficiency.

Vismec, therefore, is preparing for Fakuma 2023 with the aim of presenting machinery and devices that, due to their  features, perfectly match with current trends and market demands. 

Vismec objectives for Fakuma 2023

For our company this is a debut: our first participation in the Friedrichshafen exhibition. Companies in the plastic processing sector, however, already know Vismec machinery and solutions as innovative, consumes-efficient and able to ensure high quality end results. 

At Fakuma 2023 we want to focus on:

• Our individual or centralised conveying systems. A range of solutions for the automatic conveying and distribution of plastic granules: complete, flexible and adapted to the different needs of companies.
• FW50, the control system connected to a Vismec 4.0 supervision device. In the new version, the FW 50 is equipped with a touchscreen display that makes interaction between the machine and the operator even easier.

Thanks to our participation to the trade fair, we plan to meet companies to work with as a partner, giving birth to new collaborations. 

Moreover, Fakuma 2023 will also be an opportunity for Vismec to grasp the trends in our sector and the new market developments, and discuss them with enterprises and experts. A valuable motivation for those who, like us, want to make a difference every day.

Would you like to learn more about Vismec and its most innovative products? Contact us or visit us at the fair: we look forward to seeing you in Friedrichshafen from 17 to 21 October, Hall B2, Booth B2 - 2220.

by Laura Franceschi

Cyclonic filter: features and benefits

What is the cyclonic filter, and what benefits does its use entail in the vacuum transport phase of granules and plastic material? Let’s see it in this article, where we also present the applications and advantages of the cyclonic filter used in Vismec conveying systems.

Cyclonic filter: how it works

Pneumatic conveying of plastic granules can take place either under pressure or in vacuum. In vacuum conveying systems, a depression is created inside the duct through which the plastic material passes. In this way, the pressure difference generates an air flow that vacuums the granules and conveys them toward their intended destination.

In this type of system, the cyclonic filter that separates the plastic particles from the air used for transport plays a fundamental role. In summary, it operates in the following way.

• Suction of the granules: as we have seen, the granules are attracted by the air flow that is created by the pressure difference: in this way, the transport process begins.
• Creation of the vortex: a vortex is created inside the cyclonic filter, due to the centrifugal force to which the air flow and the transported material are subjected.
• Separation of particles: thanks to centrifugal force, the plastic granules separate from the air flow, which is then expelled.

This system has the advantage of avoiding any contact with outside air and makes the process contamination-free. So, cyclonic filter pneumatic vacuum conveying is also used in the pharmaceutical, food and chemical sectors, as well as, of course, in the conveying of plastic granules.

Advantages of the cyclonic filter in Vismec systems

The advantages of the cyclonic filter in this type of mechanism are more than one. Let us see them all.

• Separation efficiency: thanks to its structure and its physical mechanism of operation, the cyclonic filter allows plastic granules to be separated from the air flow very effectively.
• Robustness: the filters are designed and constructed to resist over time the continuous stresses arising from the activity of transport. In fact, this activity is very frequent and almost uninterrupted in the plastics processing sector.
• Ease of maintenance: maintenance of the cyclonic filter is relatively undemanding and does not require much time or specialised operations. In fact, it is usually limited to periodic cleaning of the internal walls to ensure optimal performance is maintained.   
• Adaptability: the filters, and in general the entire vacuum conveying system, can be customised to meet the specific needs of different plastics processing companies. 

The last point is one of the advantages of the cyclonic filter vacuum conveying units produced by Vismec. In fact, our systems can be customised in different configurations, even for long distance conveying.

But let us also look at the additional advantages of Vismec vacuum units.

• Big attention to correct filter sizing. Unlike other more compact products, the double and triple stage cyclonic filters that we produce and integrate into our conveying systems are sized extremely precisely, depending on the application. For this reason, they guarantee better process efficiency.
• Double filter with automatic exchange system Vismec filters can be supplemented by an additional back-up filter. The operating mechanism allows switching to the secondary filter with an automatic exchange system whenever the detection sensor signals this as necessary. A safety mechanism gives continuity to the transport phase, avoiding blockages, downtime and consequent delays.
• Easy cleaning: in Vismec vacuum conveying systems, filter cleaning is also automatic. This further reduces maintenance time and costs.

Therefore, the use of the cyclonic filter in vacuum conveying systems for plastic granules enables more efficient and optimised feeding. The benefits? Improved process quality, reduced inefficiencies and a better ratio between investment and end result.

Are you a company operating in the plastics processing sector? Contact the Vismec team to learn about all the benefits of our vacuum conveying units. Find out how we can adapt them to the needs of your company and your production processes.

by Laura Franceschi

Bioplastics: what they are, applications, Vismec equipment for industry

Do you know what Bioplastics are? Bioplastics are an increasingly popular sustainable alternative to traditional plastics. Coming from natural sources, they have characteristics comparable to those of normal plastics used in production processes, but have a reduced environmental impact.

Due to its features, this type of material allows for quite wide applications, including innovative sectors such as medical, 3D printing and green technologies.

What are bioplastics?

To better understand the definition of bioplastics, let us start with their origin. These are polymers produced using biodegradable or renewable raw materials, such as corn starch, sugar cane, potatoes or algae.

Bioplastics are less harmful to the environment and contribute to the reduction of CO2 emissions. Plus, of course, they reduce the production, use and consumption of plastic globally. Let us take a look at their main characteristics:

• Biodegradability: bioplastics decompose spontaneously through biological processes. Therefore, they do not contribute to the accumulation of plastic waste in the environment. In addition, they can be disposed of in a more sustainable way.
• Production from renewable raw materials: bioplastics are produced using plant-based raw materials that can be grown again and thus are available on a long-term basis.
• Reduction of CO2 emissions: in their production process, bioplastics generate far less CO2 than petroleum-derived plastics.
• Flexibility: bioplastics have different properties. Rigidity, elasticity or resistance, for example, are more or less common characteristics depending on the requirements of use.

Therefore, bioplastics represent a sustainable and innovative solution for the production of plastic materials. In the next section, we will talk about their applications and the advantages and disadvantages of their use.

Bioplastics: examples, disadvantages and advantages

Presenting some examples of bioplastics and some of their applications is the best way to explain what they are and why they are growing in popularity. Among the best-known types are:

• Polylactic acid (PLA), a bioplastic made from corn starch used to produce bottles, food packaging, caps and containers;
• Green polyethylene, derived from sugar cane, it is used for bags, films and containers;
• Polyhydroxyalkanoates (PHA), bioplastics made from vegetable oils and sugars, which find application in areas such as packaging, medicine, cosmetics and agriculture;
• Polybutylene succinate (PBS), used to produce biodegradable bags, films and packaging materials;
• Polycaprolactone (PCL), that finds application in packaging and 3D printing. It is also used for medical applications, e.g. for resorbable sutures;
• Mater-Bi, 100% compostable, is used to produce shopping bags, packaging and protective films and disposable tableware.

We have already talked about the main benefits of bioplastics in terms of sustainability, versatility and their use in highly innovative sectors.

The disadvantages, on the other hand have to do mainly with three elements:

• availability of raw materials, that is large-scale production of bioplastics requires a significant amount of plant raw materials;
• complex production processes, due to the expensive chemical and biotechnological processes for the transformation of green raw materials into bioplastics;
• composting, since some bioplastics need a controlled environment to degrade properly.

However, more and more companies are using this type of material in plastics processing. To meet their needs, Vismec has developed specific technologies and machinery.

Vismec equipment for the bioplastics sector

Our company offers a line of dryers designed specifically for all those materials that, due to their characteristics, must be treated at temperatures between 35°C and 50°C.

This innovation is dedicated to specific sectors, which we are going to examine right now.

• The bioplastics field which we are talking about this article: biological polymers that cannot be dehumidified at high temperatures. In fact, during the process, this type of material could melt or undergo degradation that would alter its characteristics and functionality.
• Materials that, subjected to high temperatures, release oils or volatile substances with a negative impact on the end result of the process.

Our low-temperature dehumidifiers work in a similar way to Vismec rotor dryers. However, to each dehumidifier we add an air/air heat exchanger located before the heating chamber. This includes a series of fans that lower the temperature of the air used to dehumidify the plastic granules.

Available in different sizes and integrable with additional accessories, our low-temperature dryers are reliable, versatile and efficient.

Would you like to know more about the features of Vismec's equipment offered to companies in the bioplastics sector? Contact us: our technicians will provide you with all the necessary specifications.

by Laura Franceschi

Vismec presents Vistouch

Vismec is proud to present VisTouch: the simple and intuitive system to control Vismec wheel dryers series DW (DryWell) and DP (DryPlus).

Finally, the drying data all at a glance!

Learn more about VisTouch here.

by sviluppo

Pneumatic conveying of plastic granules: what it is, advantages, Vismec solutions

Pneumatic conveying of plastic granules: what is it, how does it work and what are its applications? We are going to talk about it in this article, also introducing all the advantages of Vismec conveying systems for plastics processors.

Pneumatic conveying of plastic granules: what is it?

Pneumatic conveying of plastic granules is an efficient and advanced system for the fast and safe transfer of polymers in different processing steps. This method, which uses compressed air, creates a flow that is pushing granules through pipes and ducts.

The pneumatic conveying process, also called feeding, takes place through systems that integrate different technologies and equipment. We will see this in more detail in the next section, in which we will present the Vismec conveying systems.  However, let us anticipate that pneumatic conveying of granules offers several advantages compared to other methods, such as mechanical conveying. For example:

• fast and continuous movement of materials without the need for complex operations or production interruptions;
• greater control over the speed and quantity of material conveyed, enabling a more accurate and reliable dosing process;
• reduced waste and more efficient waste material management;
• pneumatic conveying in an enclosed environment, with reduced risk of external contamination.

These characteristics make this feeding method perfect for many sectors, especially those with specific quality, safety and efficiency requirements.

A prime example is the granulation of residual material from processing. In this process, plastic waste is ground into granules and then transported to the melting or extrusion machines, without waste.

The pneumatic conveying of plastic granules is also used in other industrial sectors, such as the production of containers or other products for the medical and pharmaceutical sectors. In fact, in these areas, feeding in a closed environment is ideal for maintaining the integrity of the material conveyed, avoiding contamination or alteration of its characteristics.

Thus, pneumatic conveying systems, as we have seen, represent an advanced and highly efficient method of handling that offers many advantages. This is precisely why, among the auxiliary machinery that Vismec proposes to plastics processors, there are also various pneumatic granule conveying systems.

Vismec pneumatic conveying systems

In the range of feeding systems and components for plastic granule conveying systems we offer:

• vacuum systems with side channel blowers, available in various configurations;
• receivers with various load capacities;
• automatic manifold that make the feeding phase fully automated;
• efficient and accurate self-learning weighing systems, such as the Halo weighing ring;
• duct cleaning valves and dedusters, to guarantee perfect plant efficiency and the best quality of the final product.

Our feeding and conveying machines and systems enable the automatic distribution of plastic material efficiently and effectively, through individual or centralised control systems integrated with OPC UA protocol. These include the Vismec FW50, capable of handling up to 48 transport stations, depending on the company’s requirements.

The advantages that our pneumatic conveying systems offer companies are many. Let’s see all.

• Energy efficiency: Vismec solutions are designed and manufactured for maximum energy efficiency, reducing consumption and costs.
• Complete traceability of the plastic granule, resulting in reduced processing waste and associated costs;
• High quality results, thanks to the attention we pay to each individual component and its functional integration within the machinery or plant. An example? The dedusting systems we have just mentioned. In fact, our dedusting systems are used in high-tech production, such as in the optical sector, where the perfect cleanliness of lenses, optical covers and other surfaces is a basic condition.
• Flexibility: we calibrate machinery and systems for the pneumatic transport of plastic granules according to customer requirements. In fact, Vismec products are available in different configurations, sizes and materials, depending on the field of application and the production layout in which they will be inserted.

If you would like to learn more about our granule conveying equipment and the most suitable applications for your company, please contact us and talk to our technicians: the Vismec team will be happy to help you.

by sviluppo

Plastics processing: all about it and Vismec solutions

The term “plastics processing" refers to the various industrial processes that allow plastic materials to be transformed into products, objects and components.

Thus, the processing of plastic materials is a key activity in the production of goods. This is why it is important to manage it with efficient, high-performance and safe solutions and machinery.

So this article presents the main processing operations and gives an overview of the different solutions that Vismec offers plastic processors.

1: Moulding

One of the most common techniques used is moulding. The process begins with melting plastic material, placing it in a mould and applying properly calibrated pressure to make the finished product.

The most common types of moulding include:

• Injection, during which the plastic material is injected into the mould to create the desired shape;
• extrusion, where a molten plastic wire is passed through a shaped mould to create long sections of constant shape, such as pipes or plastic bars;
• rotational, the process of rotating a mould to create hollow, spherical or cylindrical shapes that do not require further welding.

2: Extrusion

Another popular technique in the field of plastics processing is extrusion.

This is a continuous process that uses a press to force suitably heated and melted plastic material through a specially shaped duct called 'head' or supply chain.

The material expands and takes the desired shape, before being cooled. This is achieved by using:

• flat heads to make sheets, plastic plates and films;
• ring heads to produce tubes and tubular films;
• shaped heads for geometric profiles and joints.

In other words, the shape of the head varies depending on the type of result desired and the final application. Extrusion is often used to create thermoplastic tubes, sheets, joints and profiles.

3: Blowing

Blowing is a plastic processing technique used to make three-dimensional objects such as bottles and containers.

The process takes place in several steps:

• plastic granules are melted in a heated cylinder, resulting in a tubular plastic pre-mould;
• tube is inserted into a mould shapes as the finished product;
• air is blown into the mould to make the plastic adhere to its walls;
• material is kept into the mould until it has cooled and hardened. After that, the mould is opened to release the finished shape.

Vismec offers a wide range of machinery designed for plastic processing companies. Especially, our products are designed to make moulding, extrusion and blow moulding processes more efficient. We offer solutions for:

• energy saving drying of plastic granules;
• automatic polymers conveying and feeding;
• precise dosing of plastic material during mixing;
• grinding of plastic processing waste;
• material storage.

In addition to these processes, for which Vismec offers tailor-made advanced solutions, there are other plastic processes. Let us look at them together.

4: Thermoforming

With the thermoforming technique, heat is applied to a sheet of plastic material, making it malleable.

Once ready, the sheet is placed over a mould that is set for the final shape of the product and then subjected to calibrated pressure to create the desired object.

Thermoforming is commonly used to produce packaging (e.g. food containers), toys and decorations.

5: Calendering

Calendering is a technique used in the processing of rigid materials such as PVC: it applies heat and pressure to a rigid sheet to make it malleable.

Once this first part of the process is completed, the sheet is rolled and formed to the desired shape.

Calendering is used to make flooring, fixtures, wall coverings, roofing and technical textiles.

6: Hot bending

Hot bending is another technique for processing plastic sheets. The sheet, previously cut, is heated at a high temperature. Once a specific heat point is reached, the material can be bent or shaped. This process is widely used in the production of signs and poster materials.

Vismec machinery supporting plastic moulding, extrusion and blow moulding processes offers several benefits to companies in this sector. These include:

• energy savings;
• reduction of waste and costs through traceability;
• increased efficiency and productivity.

If you want to know more, contact us. We will help you choose the best machinery for your business.

by sviluppo

OPC UA Protocol: all about it and the benefits for your business

The OPC UA protocol is an important evolution in the field of industrial automation and communication among devices. In this article we are going to introduce its features, advantages and practical applications in Vismec machines.

OPC UA protocol: characteristics

The acronym OPC UA stands for Open Platform Communications Unified Architecture and indicates a standard created to manage the continuous flow of information among non-homogeneous devices. In particular, the OPC UA protocol is one of the main systems for ensuring data interoperability in advanced industrial automation, the so-called Industry 4.0.

Thanks to this protocol, industrial machinery dialogues with the management system of manufacturing companies, enabling the automated organisation and management of production processes and making work easier and faster.

The rules and technical specifications encoded in OPC UA allow the different components of automated systems to communicate with each other, without requiring the development of customised codes to handle complex situations.

Thus, devices and applications from different manufacturers can share data regardless of the platform or programming language they use. This simplifies the integration of new devices and the upgrade of existing systems, reducing costs and increasing efficiency. Everything is done through an intuitive and user-friendly human-machine interface according to the principles of Industry 4.0.

Benefits for automation

The OPC UA standard is used in many sectors, from classic manufacturing industries to advanced industrial automation and medical sectors. As we said, it has been created to ensure interoperability between devices and control systems by providing a standardised communication protocol.

Among the advantages of the OPC UA protocol:

1. advanced security, that is OPC UA provides robust security features to protect data shared between devices. In particular, it uses end-to-end encryption, certificate-based authentication and digital signature mechanisms to ensure integrity and privacy. This is particularly important in industrial automation, where data protection and access control are crucial to avoid security breaches.
2. scalability and flexibility, which means that OPC UA is highly scalable and can be used in networks of any size, from small local installations to large infrastructures spread across multiple sites. In addition, it is suitable for different industries and for use on multiple devices: PCs, servers, mobile technologies and even embedded devices.
3. advanced data management, that is OPC UA has powerful tools for managing data. Its functionalities allow, for example, real-time publishing, historical storage, alarm information and past malfunctions storage.
4. open standards, that means that OPC UA is a protocol based on open source standards. This allows it to be integrated with systems such as SCADA, MES (Manufacturing Execution Systems) and others, enabling an uninterrupted flow of information among the different levels of automation.

The OPC UA protocol also allows production monitoring and analysis. Thus, in addition to the benefits in terms of automation, user friendliness, increased productivity and time reduction, companies also have access to useful, up-to-date information for making decisions and optimising operations.

Given these characteristics and the benefits it offers companies, Vismec decided to integrate the OPC UA standard in all its machines.

Applications of the OPC UA standard in Vismec machines

The integration of the OPC UA standard in Vismec machines is carried out through a plug and play system. This means that operator intervention during initial operation is very minimal: there is no need for detailed knowledge of the hardware or manual installation.

As we have seen, the protocol allows the production system to be controlled and supervised from a single control point. From the management system, whoever controls production (or a phase of the production process) inputs an order to the system, which the machines execute automatically.

Through OPC UA protocols, it is possible to:

• activate the machines involved in the different processes, as conveying, volumetric and gravimetric dosing, drying, grinding and storage;
• set the correct parameters, such as temperature, dew point, flow rate, load and others;
• obtain data on production efficiency in order to better organise it.

An example? Vismec FW 50, a control system that manages up to 48 conveying stations per empty line with a possible emergency reserve system.

All components are connected internally via VisiBus protocol and externally via the universal OPC UA interface. The FW50 control also has an user-friendly display and provides for connection to the Vismec 4.0 supervisory system.

Would you like to discover the advantages of the OPC UA protocol integrated in Vismec products and understand how to apply it to your company’s production and management system? Contact us: we are at your disposal.

by sviluppo

Plastic granules: how to obtain them, what they are used for, Vismec solutions for granulation

Plastic granules are one of the key materials for plastic goods production. But how are they produced, which sectors are they used in, and what solutions does Vismec offer for granulation? Let’s talk about it in this article.

What are plastic granules?

Plastic granules are an essential raw material for plastic manufacturers. They are very small granules, similar to grains of rice, used for the production of plastic objects such as bottles, food industry packaging, electronic product components and many others.

They are generally made from natural or synthetic polymers and, once available, are used by companies according to production needs and the type of objects or components to be manufactured.

They offer a greater efficiency and flexibility than raw resins. In addition, they avoid waste, as material that has already been moulded but not used can be recycled and reused to produce new granules.

However, plastic granules also offer other advantages. Let’s see them all.

• Wet granulation: the starting plastic material is immersed in a special liquid and then passed through a granulator, forming the plastic granules.
• Dry granulation: plastic powder particles are subjected to high pressure. As a result of the pressure, these materials aggregate to form granules.
• Melt granulation: the process involves kneading powders or other plastic materials with specific substances. Once created, the mixture becomes the material from which the granules are made.
• Granulation by grinding: in this case, a mechanical grinding system is used to reduce the solid material into granules of the desired size. This process also allows plastic waste from production processes to be reduced into granules.

Thus, the last of the systems we introduced also offers the advantage of being sustainable, since it allows re-use of waste material.

Vismec operates as a reseller of machinery that acts by shredding plastic waste. In fact, our company offers plastic processing companies granulators designed for in-line recovery of sprues.

In this way, waste can be reused in the production cycle, reducing the environmental impact of operations.

Plastic granules: areas of use and applications

Having seen what plastic granules are and how they are produced, let us now look at some of their main applications.

Plastic granules are widely used in various industries, including the automotive, technology products, medical, bioplastics, electrical engineering and beverage sectors.

• In the automotive industry, plastics are used for their wear, impact and extreme weather conditions resistance. Thus, plastic granules are used for the production of interior and exterior car parts: bumpers, dashboards, seats, airbag parts and many other components.
• They also find various uses in the technology sector. Electronic devices such as smartphones, tablets, computers and cameras feature various plastic elements, which provide strength, lightness and flexibility.
• The medical sector is another important target market. Plastic is a material that, if properly processed and with the right composition, meets specific requirements for sterility, safety and durability.  As a result, plastic granules are used to produce, for example, pharmaceuticals, surgical instruments and diagnostic equipment.
• In the field of bioplastics, different types of plastic granules are used, made from natural raw materials such as cellulose, sucrose and starch. These materials are used in the production of various goods, from bags to food packaging: all products whose basic materials help to reduce the environmental impact of plastic products.
• The electro-technical industry uses granules mainly for the production of electrical and electronic components such as cables, connectors, covers and switches. Plastics are perfect for these applications. Since they have insulating properties, can withstand high temperatures and resist the aggression of chemicals.
• Finally, the beverage sector uses plastic granules for the production of plastic bottles, caps and rings suitable for containing and preserving beverages without altering their properties.

So, for companies in the plastic material processing sector, the granulation process is crucial.

For this reason, Vismec offers its customers efficient and sustainable inline granulation and sprue recovery machines in cooperation with specialised partners.

Our granulating systems are efficient, easy to clean and maintain, and can be tailored to your company’s needs.

If you want to know more, contact us!

by sviluppo

MECSPE 2023 – Bologna Fiere

MECSPE 2023 – Bologna Fiere – 29-31 Marzo.

Hall 36 Stand E18!

by sviluppo

Road to K-Trade Show 2022

Vismec is preparing for a new edition of K 2022.

An unmissable event for Vismec that announces its participation.

We will be present with many news from 19 to 26 October 2022 in Düsseldorf, STAND 11 HALL G36!

by sviluppo

Summer Holidays 2022

Vismec will be closed for summer holidays from 6 to 21 August 2022.

The offices will resume their normal activity on August 22nd.

by sviluppo

Effective solutions for advanced logistics management in Vismec

Vismec aims to identify possible solutions for advanced logistics management by inserting new industrialization models in order to optimize business flow and reduce waste, to make the company able to compete in a complex and difficult market situation such as the current one.

by sviluppo

MECSPE 2022 – Bologna Fiere

See you at MECSPE 2022 (Bologna Fiere, 9-11 June) Hall 36 Stand E59! We are there! We will introduce you to our products and all the news of this year!

To learn more, come and visit our stand! We are waiting for you!

by sviluppo

Winter break 2021

During the period from December 24^th to January 9^th our office will be closed for winter holidays.

by sviluppo

MECSPE 2021 – Bologna Fiere

Vismec announces its participation in MECSPE 2021 (Bologna Fiere, 23-25 November) Hall 36 Stand E60!

After this long period of stop, we are ready to start again!

Mecspe 2021 will not only be an opportunity to present Vismec products, but above all the return to direct contact with the customer!

Vismec will present Vistouch, a revolution in the world of Vismec dryers: a bright and immediate touchscreen panel that allows the control of Drywell and Dryplus dryer series in a precise and intuitive way.

You’ll find the Vismec pneumatic conveying systems, characterized by solid and functional Vacuum Units and Receivers made completely of stainless steel and pyrex with adjustable elements for maximum installation flexibility.

Always moving towards a precision technical moulding, we’ll introduce the innovative dedusting system for the moulding of transparent or medical products in the range from 40 Kg/h to 300 Kg/h of dedusted material.

Among the news of Mecspe 2021, the new Ratio and Line Cleaning Valves, with an essential and completely revolutionized design with very high efficiency and the continuous weigh-loss gravimetric and volumetric dosing systems.

To learn more, come and visit our stand! We are waiting for you!

by sviluppo

Vismec presents Vistouch

Vismec is proud to present VisTouch: the simple and intuitive system to control Vismec wheel dryers series DW (DryWell) and DP (DryPlus).

Finally, the drying data all at a glance!

Learn more about VisTouch here.

by sviluppo

Summer Break 2021

We will be closed from August 9th to August 22nd.

by sviluppo

MECSPE 2020 – Exhibition cancelled

We’re sorry to inform that Mecspe 2020 has been cancelled due to the new Government Decree.

by sviluppo

K Bullettin 2019

It is K time again and we are proud to present our products and some important news at this K 2019 edition.

by sviluppo

K-MESSE 2019

K Show is coming…come to discover the difference!

DÜSSELDORF  16 – 23 OCTOBER 2019

HALL 11  STAND F32

by sviluppo

Vismec awarded by Banca Intesa Sanpaolo impresa vincente

VISMEC awarded by Banca Intesa Sanpaolo Impresa Vincente. Advanced strategic skills in terms of internationalization, innovation, enhancement of the skills and talents of its human capital. These are the key words to represent the excellence in the Intesa Sanpaolo’s “Imprese Vincenti” Program. It’s precisely for that reason that Vismec won the 2019 Business Award in the Industry and Services category.Make difference, make always the best. Focus on human capital. Innovation, global view.Vismec takes shape: IMPRESA VINCENTE BANCA INTESA SANPAOLO 2019

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MECSPE 2019

Come to discover us for the first time at Mecspe Show!

We are waiting for you!

HALL 6 STAND C 13

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Plastpol 2019

PLASTPOL 2019 from 28th to 31st May… We are waiting for you    HALL E   STAND 32!

by sviluppo

Indiaplast 2019

by sviluppo

Emaf Exhibition 2018

COME TO DISCOVER US!

21 – 24 NOVEMBER 2018

PORTO, PORTUGAL

HALL 2 STAND A05

by sviluppo