Pure Aluminum Die Casting Method

Abstract

The invention discloses a pure-aluminum die-casting method. The method comprises the following steps: heating solid aluminum to be a liquid state, in which the temperature of the liquid in the liquid state is 730 to 790 DEG C; pouring the liquid aluminum in a shot barrel; shooting the liquid aluminum from the shot barrel to a die cavity, wherein the gate width of the die is larger than or equals to 3 mm, the draft angle of the die is larger than or equals to 2 degrees, and the die temperature is set to 180 to 240 DEG C; carrying out pressure-maintaining cooling to the die, and when the cooling threshold value is reached, separating the upper die from the lower die of the die; ejecting the casting molded in the die cavity. The pure-aluminum die-casting method aims to a characteristic that the melting point of the pure aluminum is higher than that of a common aluminum die casting, increases the draft angle, the gate width and the temperature of the die, raises the raw material temperature, and improves the aluminum liquidity when shot to the die, so that in the casting process, the die cavity is quickly filled with the aluminum, and the die filling integrity of the casting can be ensured.

Description

technical field [0001] The invention relates to a metal die-casting method, in particular to a pure aluminum die-casting method. Background technique [0002] Traditional die-casting aluminum is an alloy of aluminum and other metals (such as copper, magnesium, zinc, iron, etc.). Castings made of die-casting aluminum can only be treated with ordinary powder spraying and oil spraying, and cannot be anodized, which makes the appearance of castings made of die-casting aluminum relatively monotonous and poor in texture. Compared with traditional die-casting aluminum, castings made of pure aluminum die-casting have good anodic properties. Not only can various bright colors be colored by oxidation treatment, but also the oxide film produced by the anode has certain acid and alkali resistance. Corrosion, sun-resistant and non-discoloration properties, with the same metal texture as extruded profiles, can meet the needs of customers with high color requirements. [0003] Since the ...

AI Technical Summary

Problems solved by technology

[0003] Since the melting point of pure aluminum is higher than that of traditional die-casting aluminum, using traditional die-casting methods to die-cast pure aluminum, the fluidity of liquid aluminum in the production process is too poor, which will lead to incomplete filling of castings. Therefore, traditional die-casting aluminum methods are not suitable. Suitable for pure aluminum die casting production

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