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Temperature Control of Plastic Mold Processing Injection Molding

Release time:

2024-06-20

Temperature control occupies a very important part in plastic mold processing and injection molding. It can determine whether the products you make are good or bad. To put it in a big way, even if you give it to your customers, you will lose their trust in you and cause losses to the company. To put it in a small way, it doesn't matter if you do it again. These are not needed, but you have to remember that these are actually wasting the company's resources.

1. Cylinder temperature: The temperature to be controlled in the injection molding process includes cylinder 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, due to different sources or grades, the flow temperature and decomposition temperature is different, this is due to the average molecular weight and molecular weight distribution is different, plastic in different types of injection machine within the plasticizing process is also different, so the choice of barrel temperature is not the same.

2. Mouth temperature: The nozzle temperature is usually slightly lower than the top temperature of the barrel, which is to prevent the melt from "salivating phenomenon" that may occur in the straight-through nozzle ". The nozzle temperature should not be too low, otherwise it will cause the early solidification of the melt and the nozzle will be blocked *, or the performance of the product will be affected due to the injection of the early solidification material into the mold cavity.

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 injection pressure, molding cycle, etc.).