2. Mold refers to various molds and tools used in industrial production, and the required products are obtained through injection molding, blow molding, extrusion, die casting or forging, melting and stamping. In short, molds are tools used to shape objects. 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".