Special screw design and various configurations are utilized for the regeneration and color blending granulation of various plastics such as PP, PE, PET, PS, ABS, PA, PVC, PC, POM, EVA, and PMMA. The reducer features a high-torque design, achieving low noise and stable operation. The screws and barrels undergo special surface treatment, offering excellent wear resistance, mixing quality, and high yield. The design of vacuum exhaust or natural exhaust ports ensures the removal of moisture and exhaust gases during production, resulting in more stable discharge, denser pellets, and ensuring the superior quality of the product.