Characteristics of pressure casting.

Pressure casting, there are two characteristics of high pressure and high speed filling die casting. Its commonly used injection pressure is from thousands * tens of thousands of kPa, even up to 2 * 105kPa. Filling speed is about 10~50m/s, and sometimes it can 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 two advantages:

Good product quality

The dimensional accuracy of the casting is high, generally equivalent to 6~7 levels, even up to 4 levels; Good surface finish, generally equivalent to 5~8; The strength and hardness are higher, the strength is generally increased by 25~30% compared with sand casting, but the elongation is reduced by about 70%; Stable size, good interchangeability; Can die cast thin wall complex castings. For example, the current small wall thickness of zinc alloy die-casting parts can reach 0.3mm; Aluminum alloy castings up to 0.5mm; The small casting diameter is 0.7mm; The small pitch is 0.75mm.

High production efficiency

High machine productivity, for example, the domestic JⅢ3 horizontal cold chamber die casting machine can die casting 600 ~700 times in an average of eight hours, and the small hot chamber die casting machine can die casting 3000~7000 times in an average of eight hours; Die casting long life, a die casting, die casting bell alloy, life can reach hundreds of thousands of times, even millions of times; Easy to realize mechanization and automation.