The molds used in die-casting processing are usually made of alloy materials that are stronger than the processed parts. This process is somewhat similar to injection molding. The cost of casting equipment and molds are generally relatively high, so they are not suitable for processing small batches of parts. However, because the die-casting method is relatively simple to process parts and components, generally only four main steps are required, and the individual cost increment is very low, so it is very suitable for the manufacture of mass parts. In addition, die casting has a smoother surface than other casting techniques and has a higher dimensional consistency. Therefore, die casting is widely used among all casting processes.

　　Common features of mold part design

　　In the output of mold design, three-dimensional modeling is used to describe the structure of the mold and as the basis for CNC machining, while the two-dimensional drawing is the basis for the design of part processing technology. Therefore, the design of mold parts requires the output of two-dimensional drawings of mold parts. The machining process design of mold parts not only conforms to the general characteristics of mechanical machining process design, but also must be flexibly adjusted according to its own special requirements. Its general features include the following aspects:

　　Identification and determination of benchmarks

　　The design base of mold parts includes two aspects: part base and processing base. The part datum describes the assembly surface of the part, and the processing datum should generally coincide with the part datum.