Moulds (m ú j ù) are various molds and tools used in industrial production to obtain the required products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping, and other methods. In short, a mold is a tool used to make molded objects. This tool consists of various parts, and different molds consist of different parts. It mainly realizes the processing of the shape of an article by changing the physical state of the formed material. Known as the "Mother of Industry".
The requirements for mold design and production are: accurate size, smooth surface; Reasonable structure, high production efficiency, and easy automation; Easy to manufacture, long service life, and low cost; The design meets the process requirements, and is economical and reasonable.
The structural design and parameter selection of the mold must consider factors such as rigidity, guidance, unloading mechanism, positioning method, gap size, and so on. Vulnerable parts on the mold should be easily replaced. For plastic and die casting molds, it is also necessary to consider a reasonable gating system, the flow state of molten plastic or metal, and the location and direction of entry into the mold cavity. In order to improve productivity and reduce runner pouring loss, multiple cavity molds can be used to complete multiple identical or different products simultaneously in one mold. High efficiency, high precision, and long life molds should be used in mass production.
The stamping die should adopt a multi-station progressive die, and a carbide insert progressive die can be used to improve its service life. In small batch production and trial production of new products, simple molds with simple structure, rapid manufacturing, and low cost should be used, such as composite dies, thin plate dies, polyurethane rubber molds, low melting point alloy molds, zinc alloy molds, and superplastic alloy molds. The use of computer aided design (CAD) has begun for molds, which is the optimal design of molds through a complete set of computer-centered systems. This is the development direction of mold design.