Die-casting is a metal casting process characterized by the use of a mold cavity to apply high pressure to the molten metal. Molds are usually machined from higher strength alloys, some of which are similar to injection molding. Most Die-castings are iron-free, such as zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys and alloys thereof. 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 Die-casting processes are generally only used to mass produce large quantities of products. It is relatively easy to manufacture die-cast parts, which generally requires only four major steps, with a single cost increment being low. Die-casting is particularly suitable for the manufacture of a large number of small and medium-sized castings, so Die-casting is the most widely used of various casting processes. Compared to other casting techniques, the die-cast surface is flatter and has a higher dimensional consistency.
Based on the traditional die-casting process, several improved processes have been developed, including a non-porous die-casting process that reduces casting defects and eliminates porosity. It is mainly used for processing zinc and can reduce the direct injection process of waste to increase the yield.
Die-casting is a kind of precision casting method that uses high pressure to force the metal to be hydraulically poured into a complex metal mold. In 1964, the Japan Die-casting Association defined Die-casting as "a method of casting a molten alloy into a precision mold at a high temperature and producing a high-precision and excellent casting surface in a short time." In the United States, Die-casting is called Die-casting, while in the UK, Die-casting is called Pressure Die-casting, and the most common in the domestic industry is the Japanese saying, called Die-casting. Castings produced by Die-casting are called Die-castings.
The tensile strength of these materials is nearly twice as high as that of ordinary cast alloys. It is more positive for aluminum alloy automobile wheels, frames and other parts that are expected to be produced with higher strength and impact resistant materials.