A mold is composed of many mold parts. The quality of non-standard mold parts directly affects the quality of the mold, while the final quality of non-standard mold parts is guaranteed by finishing. Therefore, it is important to control the finishing.

With the progress of processing technology and production equipment, thermoplastic / thermosetting plastic products with plastic materials as raw materials and treated by different production and processing processes such as hollow molding are more and more widely used in different occasions of production and life