Cylinder temperature for mold processing
Cylinder temperature for mold processing: the temperature to be controlled during injection molding includes cylinder temperature, nozzle temperature, and mold temperature. The first two temperatures mainly affect the plasticization and flow of plastics, while the last temperature mainly affects the flow and cooling of plastics. Each kind of plastic has a different flow temperature. The flow temperature and decomposition temperature of the same type of plastic are different due to various sources or brands. This is due to different average molecular weights and molecular weight distribution. The plasticizing process of plastic in various types of injection machines is also different, so the selection of barrel temperature is also different.
Nozzle temperature for plastic mold processing
Nozzle temperature for plastic mold processing: The nozzle temperature is usually slightly lower than the maximum temperature of the barrel, which is to prevent the “salivation” of molten materials that may occur in the straight nozzle. The nozzle temperature shall not be too low, otherwise, the nozzle will be blocked due to the early setting of the melted material, or the performance of the product will be affected due to the injection of the early setting material into the mold cavity.
Mold temperature has a great influence on the internal properties and apparent quality of products. The mold temperature depends on the crystallinity of the plastic, the size and structure of the product, the performance requirements, and other process conditions (melt temperature, injection speed, injection pressure, molding cycle, etc.).
