Temperature Control of Injection Molding for Plastic Mold Processing

Temperature control plays a crucial role in plastic mold processing and injection molding, as it can determine whether the product produced is good or bad. At a large scale, even if you hand it over to customers, it will lose their trust in you and cause losses to the company. At a small scale, it's okay to redo it, but remember that these are actually a waste of company resources.

1. Cylinder temperature: The temperature that needs to be controlled during 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 type of plastic has a different flow temperature. Due to different sources or brands, the flow temperature and decomposition temperature of the same plastic vary. This is due to differences in average molecular weight and molecular weight distribution. The plasticization process of plastics in different types of injection machines is also different, so the temperature of the material barrel is also different.

2. Nozzle temperature: The nozzle temperature is usually slightly lower than the temperature at the top of the barrel, in order to prevent the possibility of "salivation" of molten material in the straight nozzle. The nozzle temperature should not be too low, otherwise it will cause early 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: The mold temperature has a significant impact on the internal 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.).