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Die casting is a metal casting process characterized by the use of a mold cavity to apply high pressure to melted metal. Molds are usually machined with higher strength alloys, in a process somewhat similar to injection molding.

Most die casting castings are iron-free materials, encompassing zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys along with their various combined formulations, each selected based on specific application requirements within manufacturing sectors ranging from automotive to consumer electronics. Depending on the particular type of die casting application and the material composition chosen, either a cold chamber die casting machine or a hot chamber die casting machine is required; cold chamber systems are typically employed for metals with higher melting points such as aluminum and copper-based alloys, while hot chamber systems function more efficiently with lower-melting-point materials like zinc and magnesium. The initial cost of casting equipment and precision molds represents a significant capital investment, which means the die casting process is generally only utilized to mass-produce large quantities of products where per-unit tooling costs can be effectively distributed across thousands or millions of components.