All kinds of tools and products used in our daily production and life, as large as the base of the machine tool, the body shell, as small as a blank head screw, buttons and the shell of various household appliances, are closely related to the mold. The shape of the mold determines the shape of these products, and the processing quality and precision of the mold also determine the quality of these products. Because of the different materials, appearance, specifications and uses of various products, molds are divided into casting molds, forging molds, die-casting molds, stamping molds and other non-plastic molds, as well as plastic molds.

In recent years, with the rapid development of the plastic mold industry and the continuous improvement of the strength and precision of general and engineering plastics, the application range of plastic products is also expanding, such as: household appliances, instrumentation, construction equipment, automotive industry, daily hardware and many other fields, the proportion of plastic products is rapidly increasing. A properly designed plastic part can often replace multiple traditional metal parts. The trend of plasticization of industrial products and daily products is increasing.

The general definition of the mold: in industrial production, with a variety of presses and special tools installed on the press, through the pressure of metal or non-metallic materials to produce the required shape of parts or products, this special tool is collectively referred to as the mold.

Injection molding process description: Mold is a tool for the production of plastic products. It is composed of several groups of parts, and this combination has a forming die cavity. During injection molding, the mold is clamped on the injection molding machine, the molten plastic is injected into the molding cavity, and the cooling and shaping in the cavity, and then the upper and lower molds are separated, and the products are ejected from the mold cavity through the ejecting system, and the mold is closed for the next injection molding, the whole injection molding process is cyclic.