In addition to the mold itself, the mold also needs the mold base, the mold base, and the device for ejecting the parts caused by the mold core. These parts are generally made into universal models.

Mould (mü jü):

1. Various molds and tools used in industrial production can obtain the required products through injection molding, blow molding, extrusion, die casting or forging, melting and stamping. In short, molds are tools used to make molded products. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the article by changing the physical state of the molding material. Known as the "mother of industry".

2. Tools for making blanks into parts with specific shapes and sizes under the action of external force. Widely used in stamping, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, compression molding or injection molding of engineering plastics, rubber, ceramics and other products. The mold has a specific contour or cavity shape, and by applying the contour shape with cutting edge, the blank can be separated (punched) according to the contour shape. Applying the shape of the inner cavity can make the blank obtain the corresponding three-dimensional shape. Generally speaking, molds include a moving mold and a fixed mold (or a male mold and a female mold), which can be separated or combined. When parting, the parts are taken out, and when closing, the blank is injected into the mold cavity for molding. Die is a kind of precision tool with complex shape, which bears the bulging force of blank and requires high structural strength, stiffness, surface hardness, surface roughness and machining accuracy. The development level of mold production is one of the important symbols of mechanical manufacturing level.

Mould classification

According to different materials: metal mold, plastic mold and its special mold.

1. Hardware dies are divided into stamping dies (such as blanking dies, bending dies, drawing dies, hole-turning dies, hole-shrinking dies, wavy dies, bulging dies, shaping dies, etc.). ), forging die (such as forging die, upsetting die, etc. ), extrusion die, extrusion die, die casting die, forging die, etc.

2. Non-metallic molds are divided into plastic molds and inorganic non-metallic molds. According to the different materials of the mold itself, the mold can be divided into sand mold, metal mold, vacuum mold, paraffin mold and so on. Among them, with the rapid development of polymer plastics, plastic molds are closely related to people's lives. Generally, plastic molds can be divided into injection molds, extrusion molds and gas-assisted molding molds.