How to control the temperature during the injection molding process of plastic molds?

Mold temperature: Mold temperature has a significant impact on the intrinsic performance and appearance quality of the product. The mold temperature depends on the crystallinity of the plastic, the size and structure of the product, performance requirements, and other process conditions (melt temperature, injection speed and pressure, molding cycle, etc.).

Barrel temperature: The temperature that needs to be controlled during the injection molding process includes 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 and decomposition temperatures due to different sources or brands. This is due to different average molecular weights and molecular weight distributions. Different types of injection molding machines have different plastic plasticizing processes, so the temperature of the material barrel is also different.

Nozzle temperature: The nozzle temperature is usually slightly lower than the top temperature of the barrel, in order to prevent the phenomenon of molten saliva in the straight nozzle. The temperature of the nozzle cannot be too low, otherwise it may cause premature solidification of the melt, block the nozzle, or affect the performance of the product due to premature solidification of the melt entering the mold cavity.