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Plastic mold processing and injection molding temperature control

Time:2020/7/13 11:02:58
¡¡¡¡ Plastic mold processing injection molding temperature control occupies a very important part, it can decide whether the product is good or bad, the bigger one is that even if you make it to the customer, it will lose the customer's trust and cause you The loss of the company, as it goes down, it doesn't matter if it's a big deal and it's not necessary to redo it, but you don't have to, but you have to remember that these are actually wasting company resources.
¡¡¡¡ 1. Cylinder temperature: The temperature to be controlled in the injection molding process includes the barrel temperature, the nozzle temperature and the mold temperature. The first two temperatures mainly affect the plasticization and flow of plastics, while the latter two temperatures mainly affect the flow and cooling of plastics. Each plastic has a different flow temperature. For the same plastic, due to different sources or grades, the flow temperature and decomposition temperature are different. This is due to the difference in average molecular weight and molecular weight distribution. Plastics are injected in different types. The plasticizing process in the machine is also different, so the temperature of the selected barrel is also different.
¡¡¡¡ 2. Nozzle temperature: The nozzle temperature is usually slightly lower than the apex temperature of the barrel. This is to prevent the "salivation phenomenon" that may occur in the straight-through nozzle. The temperature of the nozzle should not be too low, otherwise it will cause the early setting of the melt and block the nozzle*, or affect the performance of the product due to the early setting material injected into the mold cavity
¡¡¡¡ 3. Mold temperature: The mold temperature has a great influence on the internal performance and apparent quality of the product. The temperature of the mold 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 injection pressure, molding cycle, etc.).