Die casting is a precision casting method that uses high pressure to force metal melt into a metal mold with complex shapes.In 1964, the Japan Die Casting Association defined die casting as "pressing molten alloy into precision casting molds at high temperatures, and producing high-precision and excellent casting surfaces in a short period of time." The United States called die casting Die Casting, In the UK, die casting is Pressure Die Casting, What is familiar to ordinary domestic businessmen is the Japanese saying, called die casting.The castings produced by the die-casting method are called die-casting parts. (Die castings)。

The tensile strength of these materials is nearly twice as high as that of ordinary cast alloys, and has more positive significance for aluminum alloy automotive wheels, frames, and other components that hope to produce with higher strength impact-resistant materials. Advantages of die casting include the dimensional accuracy of the casting.Usually this depends on the casting material, a typical value is 0.1 mm error at the initial 2.5 cm size, and an error increase of 0.002 mm for every 1 cm increase.Compared with other casting processes, its castings have a smooth surface and a rounded radius of about 1-2.5 microns.Castings with a wall thickness of about 0.75 mm can be made relative to sandbox or mold casting.It can directly cast internal structures, such as wire sleeves, heating elements, and high-strength bearing surfaces.Some other advantages include its ability to reduce or avoid secondary machining, fast production speed, tensile strength of castings up to 415 MPa, and the ability to cast high-flow metals.

 The big disadvantage of die casting is that it is very costly.Casting equipment, molds and mold-related components are very expensive compared to other casting methods.Therefore, it is more economical to produce a large number of products when manufacturing die castings.Other disadvantages include: This process is only suitable for metals with high fluidity, and the casting quality must be between 30 grams and 10 kg. [5]In normal die casting, a batch of castings will always have pores.Therefore, no heat treatment or welding is performed because the gas in the gap will expand under the action of heat, resulting in micro defects inside and peeling of the surface.