The selection of materials for splicing dies focuses on high strength and durability. Quenched steel is commonly used. Stainless steel alloys are used in environments with high requirements for corrosion resistance. When both portability and strength need to be considered, aluminum alloys may be selected and subjected to special strengthening treatments. In terms of the manufacturing process, first, the molds are precisely designed with the help of advanced computer-aided design (CAD) software. Then comes the precision machining and manufacturing. Numerical control machining (CNC) technology is used to perform high-precision cutting, drilling, etc. on the mold blanks according to the program. High-precision measuring instruments are used to monitor the size accuracy of key parts in real time to strictly control the machining errors. After the manufacturing is completed, surface treatment processes such as grinding and polishing will be carried out to make the surface reach a high level of smoothness.