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Even sometimes corrosive gases build up in the cavity, contaminating the plastic mold, reducing the life of the mold and increasing the cost of the plastic mold. cap mould factory If the plastic injection molding process parameters are adjusted, the plastic products still have insufficient filling, high internal stress, bubbles, etc. The source of gas in the injection molding mold:

The air present in the cavity and the casting system; the water vapor generated by the evaporation of the moisture contained in the plastic material at high temperature; the gas generated by the decomposition of the plastic at high temperature; the volatilization or chemical occurrence of certain additives in the plastic Gases generated by the reaction, such as thermosetting plastics, often produce gases due to chemical reactions. It is this back pressure that prevents the normal rapid filling of the molten plastic, making injection molding difficult.

The plastic mold is poorly ventilated, and the gas in the cavity is compressed, which generates a large back pressure.. In the case of difficulties in injection molding, injection molding personnel often adopt a method of increasing the injection pressure, which leads to prolonged holding time, delayed molding cycle, reduced production efficiency, increased energy consumption of the injection molding machine, and the like.What is the role of the plastic mold in setting up the exhaust system?

What is the role of the plastic mold in the exhaust system? In the plastic injection molding process, plastic parts often encounter problems such as white, black spots, shrinkage, bubbles, silver, flash, and so on., which is likely to be the exhaust problem of the plastic mold