Double piston screen changer for plastic granulation line
The dual-column screen changer serves as a critical auxiliary component in plastic pelletizing production lines. Primarily designed to filter contaminants such as impurities and gel particles from molten plastic, it ensures continuous and stable operation of the production line. This equipment plays an irreplaceable role in enhancing pellet quality and boosting production efficiency.
Key Advantages
High-Efficiency Continuous Production: Completely eliminates downtime associated with single-column screen changers during screen changes, significantly boosting production efficiency. Particularly suitable for large-scale, high-capacity plastic pelletizing lines (e.g., processing general-purpose plastics like PP, PE, PVC, as well as engineering plastics such as PA and PC).
Stable Product Quality: Minimizes pressure and temperature fluctuations during screen changes, preventing transitional quality issues after restarting. Adjustable filtration precision (e.g., selecting different mesh sizes) accommodates various quality requirements for pelletized products.
Reduced Overall Costs: Minimizes raw material waste, energy consumption, and equipment maintenance costs associated with downtime. Extends the service life of core equipment like extruders and dies. Offers particularly significant cost advantages in applications with high impurity levels, such as recycled plastic pelletizing.
High adaptability: Equipment specifications (e.g., flow channel dimensions, cylinder diameter) can be customized based on extruder capacity, melt pressure, and raw material type. It supports complex operating conditions like high temperature and pressure, accommodating the pelletizing needs of various plastic raw materials.
Typical Applications
Recycled Plastic Pelletizing: Recycled plastics (e.g., waste films, plastic bottles, industrial scraps) often contain high impurity levels. Dual-cylinder screen changers enable continuous filtration, making them essential equipment for recycled pelletizing lines to ensure recycled pellets meet quality standards.
Modified Virgin Material Pelletizing: During plastic modification processes (e.g., adding glass fiber, flame retardants, color masterbatch), agglomerated particles or contaminants may form. The screen changer filters out pollutants, ensuring stable performance of modified plastics.
High-Specification Engineering Plastic Pelletizing: Engineering plastics like PA, PC, and PPS demand high purity. The dual-column screen changer's high-precision filtration and stable screen-changing capabilities meet the production requirements for premium engineering plastic pellets.
Large-Scale General-Purpose Plastic Pelletizing: Mass-production lines for general-purpose plastics like PP and PE require high continuity and efficiency. The dual-column screen changer can be paired with high-capacity extruders, ensuring 24/7 continuous operation of the production line.
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