What is the process of die-casting mold?

The process of die-casting mold mainly includes the following steps:

Mold preparation: Before the die-casting process begins, the mold needs to be prepared. This includes spraying lubricant into the mold cavity to control the temperature of the mold and help the casting to be de-molded.
Filling: The molten metal is cast and filled into the mold cavity at a low speed or high speed. The mold has a movable cavity surface, which is pressurized and forged with the cooling process of the molten metal, which not only eliminates the shrinkage and shrinkage defects of the blank but also makes the internal structure of the blank reach the broken grains of the forged state.
Injection: After the mold is closed, the molten metal is injected into the mold under high pressure. This pressure ranges from about 10 to 175 MPa. During the injection process, the pressure, speed, temperature, and time of the metal liquid need to be uniformly controlled.
Sand falling: When the molten metal is filled, the sand falling step is carried out, that is, the casting is removed from the mold.

In the process of die-casting mold, the design and manufacture of the mold are a crucial step. The mold design needs to take into account the shape, size, and structural requirements of the parts, as well as factors such as fluidity and cooling performance during processing. The basic structure of the die-casting mold includes molding inserts, mold frames, guides, core pulling mechanisms, ejection mechanisms, thermal balance systems, etc.

In addition, the characteristics of the die-casting process include the ability to produce castings with complex shapes and thin-walled sections, high production efficiency, and good product quality. At the same time, the die-casting process also has some disadvantages, such as the presence of pores and oxide inclusions in die-castings, limited die-casting size, and limited alloy types.

In general, the process of die-casting molds is a complex and delicate process that requires comprehensive consideration of multiple factors to ensure the production of high-quality castings.