⒈ Barrel temperature: The temperatures that need to be controlled during the injection molding process include barrel temperature, nozzle temperature and mold temperature. The first two temperatures mainly affect the plasticization and flow of plastics, while the latter temperature mainly affects the flow and cooling of plastics. Each type of plastic has a different flow temperature. The same type of plastic has different flow temperatures and decomposition temperatures due to different sources or brands. This is due to different average molecular weights and molecular weight distributions. The plasticization process of plastics in different types of injection machines is also different, so the barrel temperature is also different.
⒉ Nozzle temperature: The nozzle temperature is usually slightly lower than the maximum barrel temperature. This is to prevent the "drooling phenomenon" that may occur in the straight-through nozzle. The nozzle temperature cannot be too low, otherwise it will cause premature coagulation of the melt and block the nozzle, or the premature coagulation of the melt will be injected into the mold cavity, affecting the performance of the product.
⒊ Mold temperature: The mold temperature has a great influence on the intrinsic performance and apparent quality of the product. The mold temperature is determined by the presence or absence of plastic crystallinity, the size and structure of the product, performance requirements, and other process conditions (melt temperature, injection speed and injection pressure, molding cycle, etc.).
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