Casting is a process of metal smelting, usually by casting the mold in the mold using the gravity of the metal. However, "aluminum die-casting" is not done by gravity, but exerts a certain pressure. A bit like "injection molding". But it has a set of technically high cores, cooling and other systems. In general, the materials are sent to a cavity to be cast into a cavity through a centralized inlet to form a part.
Aluminium suitable for die casting process is die-cast aluminum, usually die-cast aluminum.
Characteristics
High-pressure and high-speed filling die-cast aluminum is the two major characteristics of die-cast aluminum. Its commonly used injection specific pressure is from several thousand to several tens of thousands of kPa, and even up to 2 × 105 kPa. The 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.
advantage
1. Good product quality: The casting has high dimensional accuracy, generally equivalent to 6~7, even up to 4; good surface finish, generally equivalent to 5~8; higher strength and hardness, generally higher than sand casting. ~30%, but the elongation is reduced by about 70%; dimensional stability, good interchangeability; die-cast aluminum thin-wall complex castings. For example, the current zinc alloy die-cast aluminum parts have a minimum wall thickness of 0.3 mm; aluminum alloy castings up to 0.5 mm; the minimum cast hole diameter is 0.7 mm; and the minimum pitch is 0.75 mm.
2, high production efficiency: high machine productivity; die-cast aluminum type long life, a die-cast aluminum type, die-cast aluminum alloy, life expectancy of hundreds of thousands of times, or even millions of times; easy to achieve mechanization and automation.
3, the economic effect is excellent: due to the precise size of the die-cast aluminum parts, the surface is bright and clean. Generally, it is no longer mechanically processed and used directly, or the processing amount is small, so that the utilization rate of the metal is improved, and a large amount of processing equipment and man-hours are reduced;