射出成形 is a method of producing parts by injecting material into a mold. Metals (for which the process is known as die-casting), glasses, elastomers, confections, and, most commonly, thermoplastic and thermosetting polymers can all be used in injection molding. The part’s material is fed into a heated barrel, mixed, and forced into a mold cavity, where it cools and hardens to the cavity’s configuration. After a product is designed, usually by an industrial designer or engineer, molds are made from metal, usually steel or aluminum, and precision-machined to form the desired part’s features. 3D printing materials like photopolymers which do not melt during the injection molding of some lower temperature thermoplastics can be used for some simple injection molds. Injection molding is widely used for producing a wide range of parts, from very small to very large. The ability to produce parts with varying geometrical shapes and sizes is determined by the type of machine used in the operation.

I can provide information about mold manufacturing based on the questions you ask. Some potential topics to explore might include the different types of molds, the materials used in mold manufacturing, the process of creating a mold, the equipment and tools required, quality control and testing methods, and industry trends and innovations in mold manufacturing.