1. Raw material control
Select high-quality raw materials: Select high-quality PVC resins and additives to ensure that the impurities and moisture content in the raw materials are low. For example, for resins and additives with strong hygroscopicity, such as nylon resins, ABS resins, etc., they must be dried to a moisture content of less than 0.1% before kneading or extrusion.
Strictly screen raw materials: Before batching, screen the resin to remove mechanical impurities. Liquid additives such as plasticizers need to be filtered and refined in advance.
2. Equipment maintenance and optimization
Regularly maintain equipment: Regularly check and maintain the core components of the extruder such as the screw and die head to ensure its stable operation. For example, parts such as the reducer bearing and the main engine bearing chamber need to be regularly checked and lubricated to prevent damage due to overheating.
Optimize equipment parameters: According to production needs, reasonably adjust parameters such as extrusion temperature, screw speed, cutting speed, etc. to ensure uniform particle size and good plasticization.
3. Process parameter adjustment
Control processing temperature: PVC materials are prone to thermal degradation, and the processing temperature needs to be strictly controlled to avoid overheating and decomposition of the material.
Optimize the cooling system: ensure that the cooling water temperature is appropriate to avoid insufficient cooling or deformation of the particles.
IV. Quality control
Strengthen quality inspection: During the production process, regularly check the size, shape and purity of the particles to ensure compliance with the standards.
Screening unqualified particles: Remove particles that do not meet the requirements through the screening process to improve product quality.
V. Operating skills
Reasonable feeding sequence: first feed the raw materials with lower viscosity, then feed the raw materials with higher viscosity to ensure that the materials are fully plasticized.
Improve operating skills: The proficiency and skills of the operator have a great impact on the quality of granulation, and operators need to be trained regularly.
