What Is Die-casting Process

Die casting is a metal casting process that utilizes the inner cavity of a mold to apply high pressure to melted metal. Molds are usually made from alloys with higher strength, and this process is somewhat similar to injection molding. Most die-casting castings are free of iron, such as zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys and their alloys. Depending on the type of die-casting, it is necessary to use a cold chamber die-casting machine or a hot chamber die-casting machine.

The cost of casting equipment and molds is high, so die-casting technology is generally only used for mass production of large quantities of products. Manufacturing die-casting components is relatively easy, usually requiring only four main steps with low cost increments per item. Die casting is particularly suitable for manufacturing a large number of small and medium-sized castings, making it the most widely used casting process among various casting techniques. Compared with other casting techniques, the surface of die casting is smoother and has higher dimensional consistency.

On the basis of traditional die casting technology, several improved processes have emerged, including non porous die casting technology that reduces casting defects and eliminates porosity. Mainly used for processing zinc, it is a direct injection process that can reduce waste and increase yield. There are also new die-casting processes such as precision and dense die-casting technology invented by General Dynamics and semi-solid die-casting.