Pressure casting is characterized by using a mold cavity to apply high pressure to the diethized metal. The four steps of the die casting process: mold preparation, filling, ejection and shakeout. During the preparation process, lubricant needs to be sprayed into the mold cavity. The lubricant can control the temperature of the mold and help separate the casting from the mold. This is the basis of any die casting process. Molds are usually machined from stronger alloys, and the equipment and molds used in die casting are expensive, so the die casting process is generally only used to manufacture large quantities of products. Die casting is particularly suitable for manufacturing a large number of small and medium-sized castings, so die casting is the most widely used among various casting processes. Compared with other casting technologies, die casting has a flatter surface and higher dimensional consistency.