The processing of injection molded parts is a complicated process, including pre-heating, molding, cooling, demoulding and other processing steps.

Whether it is the surface shrinkage of the injection molded part or the internal shrinkage hole, it is a problem of shrinkage, which is often caused by insufficient filling of the molten material when the thick part is cooled.

Although the plastic parts have been formed smoothly, there have been some unfavorable problems, which will not only affect the assembly efficiency or the performance of the whole machine

It is also a plastic part, but it may be an injection molded part or a molded part, which can only be judged from the molding process and its details.