We use and produce a variety of tools and products in daily life, to the base of the machine tool, body shell, small to bud head screws, buttons, a variety of household appliances shell, are closely related to the model. The shape of the plastic mold determines the appearance of these products, and the quality and precision of the mold determines the quality of these products. The plastic mold consists of a composite matrix composed of a concave die and a module, and a flexible punch core composed of a cardboard, a matrix and a punching combination, a composite template combination, a cavity truncation element and a composite plate side section. Coordinate the change of mold convex, concave and auxiliary molding system. Plastic parts with various shapes and sizes can be machined. In recent years, with the rapid development of the plastic industry and the improvement of the strength and precision of comprehensive engineering plastics, plastic products are also expanding, such as: household appliances, meters, construction equipment, automotive industry, daily hardware, plastics and other fields are also expanding rapidly. A well-designed plastic can usually replace a variety of traditional metal parts. The trend of plastics and household products is on the rise.