That we use in our daily life and production to the various tools and products, to the base of the machine tool, the fuselage shell, small to a germ head screws, buttons, and all kinds of household appliances shell, which has close relation with the mould. The shape of the mould determines the shape of these products, and the quality and precision of the molds determine the quality of these products. Because of the different materials, appearance, specifications and USES of various products, the mold is divided into mold mold, forging die, die casting mould, stamping die and other non-plastic molds, as well as plastic mold.

In recent years, with the rapid development of plastic industry and general engineering plastics in the aspects of improving strength and precision, the application range of the plastic products are also constantly expanding, such as household appliances, instrumentation, construction equipment, automotive industry, daily hardware, and many other fields, proportion of plastics is rapidly increasing. A reasonable design of plastic parts can replace many traditional metal parts. The trend of plastics for industrial products and daily products is increasing.

General classification of mould: can be divided into plastic mold and non-plastic mold:

1. Non-plastic mould: casting die, forging die, stamping die, die casting mould, etc.

A, casting mould -- faucet, pig iron platform.

B, forging die -- car body.

C, stamping die - computer panel.

D, die cast - superalloy, cylinder body.

2. The plastic mould can be divided according to the production process and the production products:

A, injection molding die - TV shell, keyboard button (the most common).

B, blow air mould -- beverage bottle.

C, compression molding model -- electric wood switch, scientific porcelain dish plate.

D, transfer mold - integrated circuit products.

E, extrusion die - glue tube, plastic bag.

F, hot molding molds - transparent forming package shell.

G. Spin mold - soft doll toy.