Application of Screen Changer in Plastic Recycling Processing for Extruders
The screen changer granulator machine has the following important applications in plastic recycling processing:
Filtering Impurities
Removing Solid Impurities: Recycled plastics often contain various impurities such as labels left on used plastic bottles, bottle caps, sand, dust, and more. The filter mesh of the screen changer can effectively intercept these impurities, preventing them from entering the extrusion die and avoiding defects in the final plastic products, thereby ensuring product quality and appearance.
Removing Gel and Other Materials: During the melting process of plastics, gel may be produced. Gel is a partially crosslinked plastic material that can degrade the fluidity of the plastic melt and create defects in the final product. The screen changer can filter out these gels, ensuring the purity of the extruded plastic melt.
Stabilizing the Production Process
Stabilizing Pressure and Flow Rate: It helps control and regulate the pressure and flow rate of the melt. In plastic recycling processing, stable pressure and flow rate are crucial for the molding quality of products, allowing for more uniform product dimensions and avoiding issues such as uneven wall thickness and irregular shapes.
Reducing Equipment Failures: Impurities entering the extruder's screw, barrel, die, and other components can cause clogging and wear, shortening equipment lifespan. Using a screen changer to intercept impurities before they reach the equipment greatly reduces the frequency of equipment repairs and replacements, lowering maintenance costs and ensuring production continuity and stability.
Enhancing Production Efficiency
Continuous Screen Changing Capability: Modern screen changers mostly possess the advantage of continuous screen changing. In plastic recycling processing, continuous screen changing can reduce production downtime caused by stopping the machine for screen changes, improving equipment utilization and production efficiency, while also reducing waste product generation and saving production costs.
Improving Plasticization and Homogeneity: The addition of a screen changer acts like increasing the length of the melt flow channel, enhancing the plasticization and homogeneity of the melt, enabling better mixing and plasticization of recycled plastics, further improving product quality and performance.
Improving Product Quality
Enhancing Exterior Quality: By filtering impurities, the extruded plastic melt becomes purer, thereby improving the surface finish of plastic products, reducing surface defects, and making the products more competitive in the market.
Improving Physical Properties: Purer plastic melt can make the physical properties of products more stable and reliable, such as increasing their strength, toughness, and heat resistance, meeting quality requirements for plastic products in different application scenarios.
Email: sale@heikomachinery.com
WhatsApp: +86 13803717447
Previous：Revolutionizing Rubber Processing with the New Rubber Extrusion Gear Pump
Next：How to Select a Suitable PP Packing Strap Melt Pump?