The casting drawings and mold assembly drawings are all made based on the casting process drawings. The casting drawings explain the appearance and key specifications of the castings, indicate the remaining amount of mechanical equipment processing, technical standards for castings (strength, specification errors, allowable welding defects and other special requirements), and inspection methods. Therefore, the purpose of the casting drawings is to serve as the basis for the design scheme of processing technology weapons and equipment, as well as for technical inspection, casting removal, and finished product inspection.

　　The assembly drawing of castings is used to illustrate the structure of the mold after fitting with each other. The purpose of the teaching courseware assembly drawing of molds is to serve as a basis for production site management, mold fitting, inspection, and other work.