Mould , various molds and tools used in industrial production to obtain the required products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. In short, the mold is a tool used to make shaped articles. 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 formed material. Known as the "Mother of Industry".
Under the action of external force, the blank becomes a tool with a specific shape and size. Widely used in punching, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, and engineering plastics, rubber, ceramics and other products compression molding or injection molding processing. The mold has a specific contour or cavity shape. Using a contour shape with a cutting edge can separate the blanks according to the contour shape (punching). Applying the shape of the inner cavity enables the blank to obtain a corresponding three-dimensional shape. The mold generally includes two parts, a movable mold and a fixed mold (or convex mold and concave mold), and the two can be divided and combined. When separated, the parts are taken out, and when closed, the blank is injected into the mold cavity to form. Moulds are precision tools with complex shapes and withstand the expansion force of the blank. They have high requirements on structural strength, rigidity, surface hardness, surface roughness and processing accuracy. The development level of mold production is one of the important signs of machinery manufacturing.