A die-casting device and method for aluminum alloy die-casting parts

Abstract

The invention discloses a die-casting device and method for aluminum alloy die-casting parts, which belong to the technical field of die-casting. The invention can use a movable air getter in the mold to move the aluminum alloy melt into the melt for casting after pouring the aluminum alloy melt. Inhalation treatment, which realizes open communication with the outside world after preheating treatment. The internal control ball can be consumed by chemical reaction with the oxygen in the air, so that the air pressure in the air eliminator decreases rapidly, and it absorbs the residual air in the melt When the air pressure returns to normal, the control balloon will also return to its normal size, resulting in the interaction of the magnetic field, forcing the control balloon to move outward and extrude the isolation layer to expand and interact with the melt. Improve the fluidity of the melt to increase the absorption effect of air, and then realize the elimination of air in the melt, improve casting defects such as porosity, shrinkage cavity and shrinkage porosity, and improve the compactness and other related properties of aluminum alloy castings.

Description

technical field [0001] The invention relates to the technical field of die-casting, and more specifically, to a die-casting device and method for aluminum alloy die-casting parts. Background technique [0002] Die casting is a metal casting process characterized by the application of high pressure to molten metal using the cavity of a mold. Molds are usually machined from stronger alloys, a process somewhat similar to injection molding. Most die castings are ferrous, such as zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys and their alloys. Depending on the type of die casting, a cold chamber die casting machine or a hot chamber die casting machine is used. [0003] The cost of casting equipment and molds is high, so the die casting process is generally only used for mass production of a large number of products. Manufacturing die-cast parts is relatively easy, generally requiring only four major steps with low incremental cost per item. Die casting is e...

AI Technical Summary

Problems solved by technology

[0006] However, the current aluminum alloy castings will inevitably be mixed with gas during casting, resulting in unavoidable casting defects such as pores, shrinkage cavities and shrinkage porosity during molding, and it is difficult to obtain high-density castings, so the formability (casting performance) is poor.

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