Centrifugal screens are key equipment in modern resin powder production. By combining airflow energy with screen mesh, they efficiently screen fine, lightweight, and easily agglomerated powders, effectively resolving the many challenges faced by traditional vibrating screens in handling resin powder.
Coreal Machinery has compiled some information for your reference.
I. Why is a Centrifugal Screen necessary for resin powder production?
Resin powders (such as PVC, PE, PP, ABS, nylon, and epoxy resins) often exhibit the following characteristics:
1. Extremely fine: Particle sizes range from tens to hundreds of microns, or even finer.
2. Lightweight and easily dispersed: Low density makes them prone to flying, resulting in waste and pollution.
3. Susceptible to static electricity: Triboelectric charging during screening can cause powder to adhere to screens or equipment walls, leading to blockages.
4. Susceptible to agglomeration: Fine particles tend to agglomerate due to van der Waals forces and static electricity, forming pseudo-large particles.
5. Heat sensitivity: Some resins have low melting points, and the mechanical frictional heat of traditional vibrating screens can soften or melt them, leading to screen blockages and even material denaturation.
II. Specific Applications of Centrifugal Screen in Resin Powder Production
1. Post-polymerization Processing: The raw powder after the resin synthesis reaction contains impurities such as reaction byproducts, catalyst residues, and gel particles. Centrifugal Screen can remove these impurities to obtain a pure resin base material.
2. Post-Grinding Classification: After mechanical grinding, resin particle size distribution is uneven. The Centrifugal Screen accurately classifies the powder, ensuring that fineness meets the required standards and enters the finished product storage, while coarse powder is returned to the mill for re-grinding.
3. Final Screening of Finished Product: This core application involves final screening of resin powder before packaging to ensure that the finished product is free of impurities and coarse particles, meeting the stringent quality requirements of high-end applications.
4. Homogenization Screening after Additive Mixing: After mixing resin powder with additives, the Centrifugal Screen removes mechanical impurities while also homogenizing the mixture for a more uniform consistency.
III. Advantages of Using Centrifugal Screen
1. Efficient Anti-clogging: Airflow continuously flushes the screen, completely eliminating clogging caused by static electricity and agglomeration of resin powder, and supporting long-term continuous operation.
2. High Screening Precision: Effectively controls the maximum particle size of resin powder, ensuring stable product quality.
3. Outstanding Output: High throughput, especially suitable for efficient screening of fine powders.
4. Dust-Free and Environmentally Friendly: The system operates in a closed, negative pressure environment, eliminating dust emission and maintaining a clean working environment, meeting environmental requirements.
5. No Change in Physical Properties: No mechanical vibration, low heat generation, no impact on the physical and chemical properties of resin powder, and no particle abrasion.
6. Screen Protection: Gentle screening significantly extends the service life of precision screens.
7. Intelligent Operation: Modern equipment is often equipped with a PLC control system, enabling precise control of parameters such as air volume and feed rate, enabling automated production.
Coreal Machinery is committed to providing you with high-quality screening equipment and industry solutions.