Die casting is a metal casting process characterized by the use of a mold cavity to apply high pressure to molten metal. Molds are usually made of stronger alloys, a process similar to injection molding. Most die-casting castings are iron-free, such as zinc, copper, aluminum, magnesium, lead, tin, and 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 may be used.
Because of the high cost of casting equipment and molds, die-casting processes are generally only used for mass production. It is relatively easy to manufacture die-cast parts, which generally requires only four major steps, and the single cost increment is very low. Die casting is especially suitable for manufacturing a large number of small and medium-sized castings, so die casting is the most widely used in various casting processes. Compared with other casting techniques, die casting has a more even surface and higher dimensional consistency.
On the basis of the traditional die casting process, several improved processes have been developed, including the non - hole die casting process which can reduce casting defects and remove pores. Mainly used for processing zinc, can reduce the waste increase the yield of direct injection process. There are also general dynamics invented by the precision and dense die-casting technology and semi-solid die-casting and other new die-casting technology.