The quality of PVC plastic molding will directly affect the extrusion speed of the extruder, process parameters and the quality of the profile product, thereby affecting the performance of PVC plastic. Therefore, the molding process of PVC plastic pellets must be strictly controlled in the production process. PVC plastic has excellent corrosion resistance, firmness resistance and aging resistance, and has good mixing with most plasticizers, which can greatly change the mechanical properties of the material. The kneading of PVC plastic is completed in a high-speed or low-speed kneader, which is typically a hot-cold mixing process. That is, the PVC resin is first stirred and heated to 60°C in a high-speed kneader, then a stabilizer is added, and then the temperature is raised to 90°C with stirring. °C. After the temperature is raised, the internal lubricant, processing aid, impact resistance agent, filler, colorant, and then the external lubricant are added. Next, stirring was continued to raise the temperature to 115-120°C. The material is discharged into the rotating cold mixer with cooling water at low speed, and the material is cold-mixed to below 40-45°C for discharging, sieving and bagging.
