Molds are various molds and tools used in industrial production to obtain products by injection molding, blow molding, extrusion, die casting, forging, smelting and stamping. It mainly realizes the processing of the shape of the object by changing the physical state of the formed material. Known as the "mother of industry". It is widely used in blanking, die forging, cold heading, extrusion, powder metallurgy parts pressing, pressure casting, and engineering plastics, rubber, ceramics and other products pressing or injection molding