The temperature control manner cylinder temperature:
1.Injection molding process need to control the temperature of the cylinder temperature, nozzle temperature and mold temperature, etc..The former two temperatures mainly affect the plasticization and flow of plastics, while the latter one mainly affects the flow and cooling of plastics.Each kind of plastic flow with different temperature, the same kind of plastic, due to different sources or brand, the flow temperature and decomposition temperature is little different, this is due to the different average molecular weight and molecular weight distribution, plastic in different type of injection machine of plasticizing process is also different, so choose the cylinder temperature is not the same.
2. Nozzle temperature: the nozzle temperature is usually slightly lower than the maximum temperature of the cylinder, this is to prevent the melting material in the straight nozzle may occur "saliva phenomenon".The temperature of the nozzle should not be too low, otherwise the nozzle will be blocked due to the early coagulation of the molten material, or the performance of the product will be affected due to the injection of early coagulation into the mold cavity.
3. mold temperature. Mold temperature has great effect on the internal properties and apparent quality of the finished product.Mold temperature depends on the crystallization of the plastic, the size and structure of products, performance requirements, and other process conditions (molten temperature, injection speed and injection pressure, molding cycle, etc.).