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Pressure casting is a special casting method with little or no cutting in modern metal processing technology. It is a process of filling molten metal in high pressure and high speed, and crystallizing and solidifying to form castings under high pressure. High pressure and high speed are the main characteristics of pressure casting. The commonly used pressure is tens of MPa, the filling speed (gate speed) is about 16-80 m/s, and the filling time of liquid metal is very short, about 0.01-0.2 seconds.
Because of the advantages of high production efficiency, simple process, high tolerance level of castings, good surface roughness and high mechanical strength, it can save a lot of processing procedures and equipment, and save raw materials, etc., it has become an important part of China's foundry industry.
Die-casting technology is a process that combines the three main elements of die-casting machine, die-casting die and alloy organically and makes comprehensive use of them. The process of filling the cavity with metal in die casting is to unify the process factors such as pressure, speed, temperature and time. At the same time, these technological factors interact with each other, restrict each other, and complement each other. Only by correctly choosing and adjusting these factors and making them coordinated can the expected results be achieved. Therefore, in the process of die casting, attention should be paid not only to the technological properties of the casting structure, the advancement of the die casting die, the excellent performance and structure of the die casting machine, the adaptability of the selection of die casting alloys and the standardization of the smelting process, but also to the important role of the process parameters such as pressure, temperature and time on the quality of the casting. Effective control of these parameters should be emphasized in the process of die casting.
This article is organized by Foshan Jinju Qiwei Die Casting Co., Ltd., a die-casting manufacturer. The service hotline of aluminium alloy die-casting is 0757-25500218! Website: http://www.jjqw.com/.