Magnetic Grid is a magnetic filtration device designed for plastic extrusion granulation machines. It aims to efficiently capture metal impurities in plastic raw materials to ensure stable operation of the equipment and improve production efficiency. Its core function is to absorb and filter out ferromagnetic impurities mixed in the raw materials through strong magnetic force during the plastic extrusion granulation process, preventing these impurities from causing wear and damage to key components such as the extruder screw and barrel, thereby extending the service life of the equipment and ensuring the continuity of the production process and the stability of product quality.

Magnetic Grid Features:

1. High-efficiency magnetic filtration performance: Magnetic Grid is equipped with high-performance NdFeB magnets, and the surface magnetic field strength can reach 3000-5000 Gauss, which can effectively absorb ferromagnetic impurities mixed in plastic raw materials, such as iron filings, iron powder, etc., with a filtration efficiency of up to 95%-99%. In the plastic extrusion process, even in the face of complex raw material ratios and changing processing conditions, the magnetic filtration function can be stably exerted to ensure the purity of the extruded particles.

   
   

2. Excellent pressure resistance: With special structural design and high-strength materials, it can operate normally under working pressures of up to 20-30MPa, without problems such as magnetic bar deformation, bracket cracking or magnetic force attenuation. In high-pressure extrusion processes, such as the production of high-strength engineering plastics, Magnetic Grid can always maintain the magnetic filtration effect, escorting the quality of equipment and products.

   
   

3. Precise temperature control guarantee: The operating temperature range is between -40℃ and 200℃. After strict high and low temperature tests, the magnetic force fluctuation of the magnetic bar at extreme temperatures does not exceed 5%, ensuring that the magnetic filtration function is not affected by ambient temperature changes. Whether it is outdoor production in cold areas or high-temperature processing environments, Magnetic Grid can work stably to meet production needs in different regions and complex working conditions.

   
   

4. Advantages of modular design: With modular design, each magnetic bar can be disassembled and replaced independently. When installed at the feed inlet of the extruder or the key position of the barrel, only simple tools are needed to complete the installation or maintenance, without the need for full guidance from professional technicians. The replacement time of a single magnetic bar does not exceed 10 minutes, which greatly shortens the equipment downtime and improves production efficiency.

   
   

5. Super corrosion resistance: The shell is made of 316L stainless steel, and the internal magnetic bar is specially treated with rust prevention. Even in harsh chemical environments such as high humidity, strong acid and alkali, it can resist corrosion and has a service life of 3-5 years. In the plastic recycling and processing industry, facing complex and changeable raw materials and processing conditions, Magnetic Grid always maintains high-performance magnetic filtration effects and reduces equipment maintenance costs.

   
   

6. Customized size adaptation: The diameter and length of the magnetic bar can be customized according to the customer's equipment and process requirements. The minimum spacing between the magnetic bars can reach 5mm, accurately matching the screw diameter and compression ratio requirements of different extruders. From small laboratory extrusion equipment to large industrial production lines, Magnetic Grid can provide suitable magnetic filtration solutions to ensure maximum magnetic filtration effect and production efficiency.

Applications of Magnetic Grid:

1. Plastic extrusion granulation industry: In various plastic extrusion granulation production lines, Magnetic Grid is a key equipment to ensure product quality. Whether it is producing general plastic granules such as polyethylene and polypropylene, or engineering plastic granules such as nylon and polycarbonate, it can effectively remove metal impurities in the raw materials, prevent impurities from entering the extruder barrel and screw, and avoid screw damage or production interruption due to impurity jamming, thereby improving the purity and quality stability of granular products, reducing equipment downtime, and improving production efficiency and corporate economic benefits.

   
   

2. Plastic recycling field: In the process of plastic recycling, waste plastic raw materials often contain more unknown metal impurities. Magnetic Grid can be installed at the raw material conveying pipeline or feed inlet of the recycling granulator to absorb and filter out mixed ferromagnetic materials such as metal fragments and nails in real time. This can not only protect key equipment such as extruders from damage and extend the service life of equipment, but also significantly improve the quality of recycled plastic granules, so that they can meet higher recycling standards, enhance the competitiveness of recycled plastics in the market, and promote the development of plastic circular economy.

   
   

3. Chemical fiber production: In the process of chemical fiber spinning, if metal impurities in the raw materials are mixed into the spinning assembly, it will cause problems such as spinning hole blockage and fiber breakage, which will seriously affect product quality and production efficiency. Magnetic Grid can be installed in the conveying pipeline of chemical fiber raw materials to perform deep magnetic filtration on the raw materials, remove tiny ferromagnetic particles, ensure the purity of the raw materials, ensure the smooth progress of the spinning process, improve the quality and output of fiber products, reduce production costs, and enhance the competitiveness of enterprises in the chemical fiber market.

   
   

4. Wire and cable manufacturing industry: In the extrusion production of the insulation layer and sheath layer of wires and cables, metal impurities in plastic raw materials will cause the electrical performance of the extruded products to decrease, and even cause safety hazards such as short circuits. Magnetic Grid is installed near the extruder head, which can effectively intercept metal impurities, ensure the purity of the insulating material, improve the electrical performance and safety of wire and cable products, meet the industry's strict requirements for product quality and safety, and ensure the reliability of power transmission.

   
   

5. Food packaging plastic production: In the production process of food packaging plastics, the purity and safety of the product are crucial. Magnetic Grid can be used in the extrusion granulation of food-grade plastic raw materials to strictly remove metal foreign matter from the raw materials, ensure that food packaging materials do not contain harmful impurities and meet food safety standards. This helps maintain the corporate brand image and protect the health rights and interests of consumers, while also meeting the food packaging industry's production needs for high-quality and high-safety raw materials.

   
   

6. Medical device plastic parts production: Medical device plastic parts have extremely high requirements for the purity of raw materials to prevent medical safety issues caused by impurities. Magnetic Grid plays an important role in the extrusion granulation process of producing these plastic parts, effectively filtering out metal impurities in the raw materials and ensuring that the purity of the extruded particles meets medical grade standards. This provides high-quality raw materials for the subsequent injection molding of medical device components, ensures the safety and reliability of medical devices, and meets the strict quality supervision requirements of the medical industry.

Magnetic Grid Maintenance:

• Clean impurities regularly: After each shift, use professional tools (such as non-magnetic scrapers, brushes, etc.) to gently clean the attached metal impurities along the surface of the magnetic bar to avoid long-term accumulation of impurities, which may cause wear on the surface of the magnetic bar or a decrease in magnetic force. When cleaning, wear anti-static gloves to prevent human static electricity from adsorbing impurities and causing secondary contamination to the magnetic bar, ensuring that the surface cleanliness of the magnetic bar reaches more than 98% to maintain high-efficiency magnetic filtration performance.

  
  

• Check the magnetic force of the magnetic bar: Use a high-precision magnetometer to test the magnetic force of the magnetic bar every month. If the magnetic force attenuation exceeds 10%, the magnetic bar needs to be replaced in time. During the test, samples should be evenly collected at multiple locations on the surface of the magnetic bar to ensure data accuracy. At the same time, record the trend of magnetic force changes of the magnetic bar to provide data support for equipment maintenance and prevent the problem of decreased filtration effect due to insufficient magnetic force in advance.

  
  

• Check the sealing of the equipment: Conduct a comprehensive inspection of the installation location and the sealing of the shell of the Magnetic Grid every quarter to ensure that the sealing strip is not aged, cracked or missing, and prevent raw materials or coolant from penetrating into the equipment and damaging the magnetic bar and bracket structure. If any problems are found, the sealing strips should be replaced in time and the equipment should be reinstalled to ensure that the sealing performance is restored to the initial state to avoid equipment failure and production safety accidents caused by poor sealing.

  
  

• Lubrication of transmission parts: For the movable parts in the Magnetic Grid (such as the rotating joints of the mounting bracket, adjustment bolts, etc.), use impurity-free, high-viscosity special lubricants for lubrication every six months. When lubricating, the equipment should be placed in maintenance mode, and the lubricant should be evenly applied to the surface of the movable parts with a brush to ensure sufficient lubrication, prevent the parts from being damaged or stuck due to excessive friction, and ensure the normal operation of the equipment and the flexibility of the adjustment function.

  
  

• Calibrate the installation position: Calibrate the installation position of the Magnetic Grid every six months to ensure that the parallelism error between the magnetic rod and the center line of the extruder screw does not exceed 0.5mm, and the magnetic rod spacing error is controlled within the range of ±0.2mm. During the calibration process, use professional measuring tools to accurately measure various parameters, and adjust according to the factory instructions of the equipment to ensure that the magnetic filtration effect is in the best state and improve product quality and equipment production efficiency.

  
  

• Anti-corrosion treatment: In production environments with high humidity or corrosive gases, the stainless steel shell and magnetic rod of the Magnetic Grid should be treated with anti-corrosion every quarter. A special stainless steel protective agent can be used to clean the surface of the equipment first, then spray the protective agent evenly, and wait for it to dry naturally to form a protective film. This process should be carried out in a well-ventilated environment without open flames to prevent the volatile components of the protective agent from causing safety hazards, effectively extending the service life of the equipment in harsh environments.

Magnetic Grid Specifications:

• Magnet Type: Neodymium magnet

• Material: Stainless steel housing

• Applicable Models: Suitable for various models of plastic extrusion pelletizers

Magnetic Grid FAQs:

How does a Magnetic Grid help with writing?

The faint grid lines on a Magnetic Grid act as a guide, ensuring neat, evenly spaced writing. It’s especially useful in presentations and teaching, where alignment and organization are important, but the lines remain unobtrusive for the audience.

What are the benefits of using a Magnetic Grid?

A Magnetic Grid improves organization by helping users keep their text aligned and evenly spaced. It’s perfect for creating charts, graphs, and diagrams, enhancing visual clarity while maintaining a clean, professional appearance.

Can you see the grid on a Magnetic Grid?

The grid on a Magnetic Grid is typically faint and subtle, so it’s not easily visible to an audience or in casual use. However, it provides enough guidance to help the writer stay aligned, making it ideal for detailed work like charting or planning.

What materials are Magnetic Grids made of?

Magnetic Grids are commonly made from high-quality materials like porcelain or tempered glass. These materials ensure durability, easy erasability, and a long lifespan, making them suitable for frequent use in professional and educational settings.

How do you clean a Magnetic Grid?

Cleaning a Magnetic Grid is simple. Use a microfiber cloth and a standard whiteboard cleaner to remove markings. The high-quality surface is designed to resist ghosting, ensuring that the faint grid remains visible after repeated use.