Die-casting Process

The die-casting process is a process of unifying pressure, speed and time using three major elements: machine, mold and alloy. For metal thermal processing, the presence of pressure is the main feature that distinguishes the die casting process from other casting methods.
Die casting is a special casting method that develops rapidly in modern metal processing technology. It is the process of filling the mold with molten metal under high pressure and high speed, and crystallizing and solidifying under high pressure to form a casting. High pressure and high speed are the main features of die casting. The commonly used pressure is tens of MPa, the filling speed (gate speed) is about 16 to 80 m/s, and the time for the molten metal to fill the mold cavity is extremely short, about 0.01 to 0.2 seconds.
Because the production of products by die-casting has the advantages of high production efficiency, simple process, high casting tolerance level, good surface roughness, and high mechanical strength, a large number of machining processes and equipment can be saved, and raw materials can be saved. It has become an important part of my country’s foundry industry.
  The die-casting process is a process in which the three elements of die-casting machine, die-casting mold and alloy are organically combined and used comprehensively. The process of filling the cavity with metal during die casting is a process of unifying process factors such as pressure, speed, temperature and time. At the same time, these process factors influence each other, restrict each other, and complement each other. Only by correctly selecting and adjusting these factors and making them harmonize can the expected results be obtained. Therefore, in the die-casting process, not only should we pay attention to the craftsmanship of the casting structure, the advanced nature of the die-casting mold, the performance and structural excellence of the die-casting machine, the adaptability of the selection of die-casting alloys and the standardization of the smelting process; more attention should be paid to pressure, temperature and time. and other process parameters play an important role in casting quality. In the die casting process, attention should be paid to the effective control of these parameters.