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How to control the temperature in injection mold processing?

Author: MULAN -Plastic Molding Manufacturer

Today, mold processing manufacturers will explain to you how to control the temperature in injection mold processing! Let's take a look together! ① Cylinder temperature Injection mold processing The temperatures that need to be controlled during the 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 plastic has a different flow temperature. The same plastic mold has different flow temperature and decomposition temperature due to different sources or grades. This is due to the difference in average molecular weight and molecular weight distribution. Plastics in different types The plasticizing process in the injection machine is also different, so the selection of barrel temperature is also different.

②Nozzle temperature The nozzle temperature is usually slightly lower than the barrel temperature, which is to prevent the "salivation phenomenon" that may occur in the straight-through nozzle. The temperature of the nozzle should not be too low, otherwise it will cause premature solidification of the molten material and block the nozzle, or affect the performance of the product due to the injection of early solidification material into the mold cavity. ③ Mold temperature Mold temperature has a great influence on the intrinsic performance and apparent quality of the product.

The temperature of the mold depends on 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 pressure, molding cycle, etc.).

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