Features of die casting

Die casting has two major characteristics of high pressure and high speed filling die casting. Its commonly used injection pressure is from several thousand to several ten thousand kPa, even as high as 2×105kPa. The filling speed is about 10-50m/s, and in some cases it can even reach more than 100m/s. The filling time is very short, generally in the range of 0.01~0.2s.

Compared with other casting methods, die casting has the following three advantages:

Good product quality

The dimensional accuracy of castings is high, generally equivalent to 6~7, or even up to 4; the surface finish is good, generally equivalent to 5~8; the strength and hardness are higher, and the strength is generally 25~30% higher than sand casting, but it is extended The rate is reduced by about 70%; the size is stable, and the interchangeability is good; it can die-cast thin-walled complex castings. For example, the current small wall thickness of zinc alloy die castings can reach 0.3mm; aluminum alloy castings can reach 0.5mm; the small casting aperture is 0.7mm; the small pitch is 0.75mm.

high productivity

The machine productivity is high. For example, the domestic JⅢ3 horizontal cold chamber die casting machine can die-cast 600-700 times in eight hours on average, and the small hot-chamber die-casting machine can die-cast 3000 to 7000 times on average every eight hours. The die-cast clock alloy has a life span of hundreds of thousands of times, even millions of times; it is easy to realize mechanization and automation.