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Deutsch Introduction to Aluminum Die Casting
Casting is a metal smelting process, usually by using the gravity of the metal to cast it in a mold. But aluminum die casting is not done by gravity, it is done by pressure. It's a bit like injection molding. But it has a set of high-tech core pulling, cooling and other systems. Typically, material is delivered through a central inlet into the cavity to be cast into the "shot" to form the part.
The aluminum suitable for the die casting process is die cast aluminum, usually a die cast aluminum alloy.
feature
High-pressure and high-speed filling of die-casting aluminum are two major characteristics of die-casting aluminum. Its commonly used injection pressure ranges from thousands to tens of thousands of kPa, even up to 2×105kPa. The filling speed is about 10~50m/s, and sometimes even exceeds 100m/s. The filling time is very short, generally in the range of 0.01~0.2s.
Advantage
1. Good product quality: high dimensional accuracy of castings, generally equivalent to grade 6~7, even up to grade 4; good surface finish, generally equivalent to grade 5~8; higher strength and hardness, sand casting strength generally increased by 25~ 30%, but the elongation rate is reduced by about 70%. Dimensional stability and good interchangeability; Die-cast aluminum thin-wall complex castings. For example, the minimum wall thickness of zinc alloy die-casting aluminum can reach 0.3mm; aluminum alloy castings can reach 0.5mm; the minimum casting diameter is 0.7mm. The minimum spacing is 0.75mm.
2. High production efficiency: the production efficiency of the machine is high; the die-casting aluminum mold has a long life, a pair of die-casting aluminum molds, die-casting aluminum bell alloy, the life span can reach hundreds of thousands of times, or even millions of times; it is easy to realize mechanization and automation.
3. Economic effect: Due to the precise size of the die-casting aluminum parts, the table top is smooth. Generally, it is no longer directly used for mechanical processing, or the processing amount is very small, which not only improves the utilization rate of metals, but also reduces a lot of processing equipment and man-hours;
