There are many methods for mold classification. In the past, they were often used: classification by mold structure form, such as single process die, double punch die, etc.; According to the use of objects, such as car cover mold, motor mold, etc.; Classified according to the nature of the processing materials, such as molds for metal products, non-metal molds, etc.; According to the mold manufacturing materials classification, such as cemented carbide mold, etc.; Classified by process properties, such as drawing deep die, powder metallurgical die, forging die, etc.. Some of these classification methods do not fully reflect the structure of various molds and the characteristics of the forming process, and their use functions. To this end, using the process nature and the use of molds for forming processing and the comprehensive classification method of the use of objects, molds are divided into ten categories, as shown in table 1. It can also be divided into several subcategories or varieties according to the mold structure, materials, use functions, and die making methods. Mould related English Mould related knowledge Mold quotation Mold base