All kinds of tools and products used in our daily production and life, from the base of a machine tool, the shell of a machine body, to a small embryonic head screw, buttons and the shell of various household appliances, all have a close relationship with the mold. The shape of the mold determines the shape of these products, and the processing quality and precision of the mold also determines the quality of these products. Because of the different materials, appearance, specifications and uses of various products, the moulds are divided into non-plastic moulds such as casting moulds, forging moulds, die-casting moulds, stamping moulds, and plastic moulds.

In recent years, with the rapid development of plastic industry and the general and engineering plastics in terms of strength and precision continue to improve, the scope of application of plastic products is also expanding, such as: household appliances, instruments, construction equipment, automotive industry, daily hardware and many other fields, the proportion of plastic products is rapidly increasing. A reasonably designed plastic parts can often replace multiple traditional metal parts. The trend of plasticization of industrial products and daily-use products is rising.

In industrial production, various presses and special tools mounted on the presses are used to make parts or products of the required shape from metal or non-metal materials by pressure, and such special tools are collectively called molds.

A mold is a tool for producing plastic products. It consists of several groups of parts, and this combination contains the molding cavity. During injection molding, the mold is clamped on the injection molding machine, the molten plastic is injected into the molding cavity and cooled and shaped inside the cavity, then the upper and lower molds are separated and the product is ejected from the cavity and leaves the mold through the ejector system, and finally the mold is closed again for the next injection.

Injection molding is the most common method used in plastic processing. The method is applicable to all thermoplastics and some thermosetting plastics, and the quantity of plastic products made is unparalleled by other molding methods. As one of the main tools of injection molding process, the injection mold, in terms of quality accuracy, manufacturing cycle and production efficiency in the injection molding process, directly affects the quality, output, cost and product renewal of products, and also determines the responsiveness and speed of enterprises in the market competition. It also determines the responsiveness and speed of enterprises in the market competition.

The injection molding tool is composed of several steel plates with various parts, basically divided into.

A molding device (concave mold, convex mold)
B positioning device (guide pillar, guide sleeve)
C fixing device (I-plate, mold pit)
D cooling system (water transport hole)
E Constant temperature system (heating tube, hot wire)
F Runner system (chirp hole, runner slot, runner hole)
G Ejector system (ejector pin, ejector stick)