What is Die Casting?

 Die casting is a metal casting process characterized by the use of a die cavity to apply high pressure to the molten metal. The die is usually made of a stronger alloy, and the process is somewhat similar to injection molding. Most die castings are non-ferrous, such as zinc, copper, aluminum, magnesium, lead, tin, lead-tin alloys and their alloys. Depending on the type of die casting, a cold chamber die casting machine or a hot chamber die casting machine is required.

Casting equipment and molds are expensive, so the die casting process is generally only used to batch large quantities of products. It is relatively easy to manufacture die-cast parts, which generally requires only four major steps and the unit cost increment is very low. Die casting is particularly suitable for manufacturing a large number of small and medium-sized castings, so die casting is the most widely used of various casting processes. Compared with other casting technologies, die casting has a smoother surface and higher dimensional consistency.

Several modified processes have been born based on the traditional die casting process, including the non-porous die casting process to reduce casting defects and eliminate pores. Direct injection process, mainly used for processing zinc, can reduce waste and increase yield. There are also new die-casting processes such as precision die-casting technology invented by General Dynamics and semi-solid die-casting.