The Magnetic Grid is a magnetic filtration device designed specifically for plastic extrusion and pelletizing equipment. It efficiently captures and filters ferromagnetic impurities from plastic feedstock. It utilizes high-performance neodymium iron boron magnets to generate a powerful magnetic field, effectively trapping impurities such as iron filings and iron powder from the plastic feedstock. This protects critical components like the extruder screw and barrel from wear, ensuring stable operation and extending the life of the equipment.

Magnetic Grid Specifications:

• Magnet Type: Neodymium magnet

• Material: Stainless steel housing

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

Magnetic Grid Features:

1. High-Efficiency Magnetic Filtration Performance

Equipped with high-performance neodymium iron boron magnets, the Magnetic Grid boasts a surface magnetic field strength of 3,000-5,000 gauss, effectively adsorbing ferromagnetic impurities such as iron filings and iron powder in plastic raw materials with a filtration efficiency of up to 95%-99%. During the plastic extrusion process, even with complex raw material ratios and fluctuating processing conditions, the magnetic filtration function remains stable, ensuring high purity and consistent quality of the extruded particles.

2. Excellent Pressure Withstand

The Magnetic Grid utilizes a specialized structural design and high-strength materials to operate normally under operating pressures of up to 20-30 MPa, avoiding problems such as magnet rod deformation, bracket cracking, and magnetic force attenuation. During high-pressure extrusion processes, such as the production of high-strength engineering plastics, the Magnetic Grid maintains consistent magnetic filtration performance, safeguarding both equipment and product quality.

3. Precise Temperature Control

The Magnetic Grid operates within a temperature range of -40°C to 200°C. Rigorous high and low temperature testing ensures magnetic force fluctuations of no more than 5% under extreme temperatures. Whether operating outdoors in cold climates or in high-temperature processing environments, the Magnetic Grid operates stably, meeting the production needs of diverse regions and complex working conditions.

4. Modular Design Advantages

The Magnetic Grid utilizes a modular design, allowing each magnetic bar to be independently removed and replaced. When installed at key locations on the extruder feed or barrel, installation and maintenance can be completed with simple tools, eliminating the need for specialized technicians. Replacing a single magnetic bar takes less than 10 minutes, significantly reducing equipment downtime and improving production efficiency.

5. Strong Corrosion Resistance

The Magnetic Grid's housing is constructed of 316L stainless steel, and the internal magnetic bars undergo a special rust-proof treatment. They effectively resist corrosion even in harsh chemical environments such as high humidity and strong acids and alkalis, resulting in a service life of 3-5 years. In the plastics recycling and processing industry, high-performance magnetic filtration can be maintained despite complex raw materials and processing conditions, reducing equipment maintenance costs. 

6. Customizable Sizes

The Magnetic Grid's magnetic rod diameter and length can be customized to meet customer equipment and process requirements, with spacing as small as 5mm, precisely matching the screw diameter and compression ratio requirements of different extruders. Whether for small laboratory extrusion equipment or large industrial production lines, we provide the right magnetic filtration solution, ensuring optimal magnetic filtration and production efficiency.

7. High-Strength Structural Design

The Magnetic Grid utilizes an integrated high-strength alloy bracket, combined with precision laser cutting and CNC machining technology, to ensure neat alignment and uniform spacing of the magnetic rods, ensuring overall structural stability. Vibration and shock testing has been conducted over 10,000 times, with no signs of loosening or damage, ensuring long-term stable operation in complex industrial environments.

8. Quick Installation and Positioning System

The Magnetic Grid features a quick installation and positioning system with a standardized interface design, making it compatible with leading extruder brands. During installation, dowel pins and bolts secure the device, ensuring precise installation and perfect alignment with the extruder. Installation takes no more than 30 minutes, significantly improving equipment installation 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:

1. Regularly Clean Impurities

At the end of each shift, use specialized tools (such as non-magnetic scrapers and brushes) to gently clean any metal impurities adhering to the surface of the magnetic bar. This prevents long-term accumulation of impurities, which can cause wear and loss of magnetic force. During cleaning, operators must wear anti-static gloves to prevent secondary contamination from impurities attracted by human static electricity. Ensure the surface cleanliness of the magnetic bar reaches at least 98% to maintain efficient magnetic filtration performance.

2. Regularly Test Magnetic Strength

Monthly, use a high-precision magnetometer to test the magnetic strength of the magnetic bar. If the magnetic strength decreases by more than 10%, the bar must be replaced. During testing, uniformly sample the magnetic bar surface at multiple locations to ensure accurate data. Record magnetic force trends to provide data support for equipment maintenance.

3. Regularly Check Equipment Seals

Perform a comprehensive quarterly inspection of the magnetic grid's installation location and housing seal to ensure the seals are free of aging, cracks, or missing seals. This prevents raw materials or coolant from seeping into the equipment and damaging the magnetic bar and bracket structure. If any problems are discovered, immediately replace the sealing strips and reinstall the equipment to ensure the sealing performance is restored to its original state. This will prevent equipment failure and production safety accidents caused by poor sealing.

4. Regularly Lubricate Transmission Components

Lubricate the moving parts of the Magnetic Grid (such as the bracket rotating joints and adjustment bolts) every six months using a special, impurity-free, high-viscosity lubricant. During lubrication, place the equipment in maintenance mode and evenly apply the lubricant to the moving parts with a brush to ensure sufficient lubrication. This prevents damage or seizure caused by excessive friction and ensures normal operation and flexible adjustment.

5. Regularly Calibrate the Installation Position

Calibrate the installation position of the Magnetic Grid every six months to ensure that the parallelism between the magnetic rods and the centerline of the extruder screw does not exceed 0.5mm, and the spacing between the magnetic rods is within ±0.2mm. During calibration, use professional measuring tools to accurately measure various parameters and make adjustments according to the equipment's manufacturer's instructions to ensure optimal magnetic filtration and improve product quality and equipment production efficiency.

6. Regular Anti-corrosion Treatment

In production environments with high humidity or corrosive gases, the stainless steel housing and magnetic rods of the Magnetic Grid should be treated with anti-corrosion treatment quarterly. First, clean the surface with a special stainless steel cleaner. Then, evenly spray the anti-corrosion agent and allow it to dry naturally to form a protective film. The entire process should be performed in a well-ventilated environment away from open flames to prevent volatile components of the agent from escaping and causing safety issues. This effectively extends the life of the equipment in harsh environments.

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.