Pressure casting is a special casting method in modern metal processing technology in the rapid development of a less-free cutting. It is the process of molten metal at high speed under high pressure mold filling, solidification and formed at high pressure casting. High-speed high-pressure casting pressure is the main feature. Commonly several tens of MPa pressure, filled velocity (ingate speed) of 16 to 80 m / s, the liquid metal filling the mold cavity is very short, about 0.01 to 0.2 seconds.

Since the products produced by this method has a high production efficiency, simple process, high grade casting tolerance, good surface roughness, high mechanical strength, can save a lot of machining processes and equipment, conservation of raw materials, etc., it has become the foundry industry in China is an important part.

Die-casting process is the three elements of die casting machine, die casting mold and alloy combinations to be organically integrated use of the process. The die-cast metal process by filling the cavity is pressure, speed, temperature and time and other process factors to obtain a uniform procedure. At the same time, these processes and factors that influence each other, mutual restraint, and complement each other. Proper selection and adjustment of these factors make it coherent, in order to obtain the desired results. Therefore, in the die casting process not only pay attention to the process of casting structure, die-casting mold of the advanced nature of the structure of die-casting machine performance and excellent resistance, adaptability and die-casting alloy smelting process chosen normative; should pay attention to the pressure, temperature and time process parameters such as the important role of casting quality. In the die casting process should focus on effective control of these parameters.