Plastic mold processing and injection molding in the temperature control to occupy a very important part of, it can decided to make the product is good or bad, to big say is even if you do it to the customer, but also will lose the customer trust in you, and cause the loss of the company, went to a small, said it doesn't matter big deal redo, they don't, but you must remember that these are in the waste of resources of the company.
1, barrel temperature: injection molding process need to control the temperature of barrel 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 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. Mouth temperature: the nozzle temperature is usually slightly lower than the peak temperature of the barrel, which is to prevent the "salivation phenomenon" that may occur in the straight through nozzle. The nozzle temperature can not be too low, otherwise it will cause the early coagulation of the melt and the nozzle will be blocked, or because of the early coagulation into the cavity and affect the performance of the product
3, mold temperature: mold temperature has a great influence on the internal performance and apparent quality of products. The mold temperature is determined by the presence of plastic crystallization, product size and structure, performance requirements, and other technological conditions (melt temperature, injection speed and pressure, molding cycle, etc.).