The dies used for die-casting are usually made of alloy materials with higher strength than the parts to be processed. This process is somewhat similar to injection molding. The cost of casting equipment and molds is generally high, so it is not suitable for processing small batches of parts. However, because it is relatively simple to process parts by die-casting method, generally only four main steps are required, and the single cost increment is very low, it is very suitable for manufacturing large quantities of parts. In addition, the surface of die-casting is more flat than that of other casting technologies, and has higher dimensional consistency. Therefore, die-casting is widely used in all casting processes.

       General Features of Mold Part Design

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

       Identification and determination of datum

       The design datum of die and mould parts includes part datum and machining datum. The part datum describes the assembly surface of the part, and the machining datum should generally coincide with the part datum.