Mold (mu ju), industrial production to injection molding, blow molding, extrusion, die casting or forging molding, smelting, the methods of stamping products of various molds and tools required. In short, the mold is used to make a molding tools, this tool consists of various parts, different mould made up of different parts. It is mainly by the changes of the molding material physical state to implement items shape processing. Known as "the mother of industrial" title.
Under the action of external force make blank into a specific shape and size of the stamping tools. Widely used in cutting, forging, cold heading, extrusion, powder metallurgy parts suppression, pressure casting, as well as engineering plastics, rubber, ceramics and other products of the molding or injection forming. Mold with specific outline or inner cavity shape, application has the edge contour shape can be made according to the outline shape separation (blanking). Application within the cavity shape can make the blank to get the corresponding three-dimensional shape. Mould generally includes moving die and die (or punch and die) two parts, the separable can close. When take out the parts separately and closed in billet injection mold cavity forming.