Gas discharge mold used during aluminum alloy casting

Abstract

The invention discloses a gas discharge mold used during aluminum alloy casting. The gas discharge mold comprises an upper mold base, wherein a liquid pressing rod is arranged at the top of the uppermold base in a penetrating and inserting manner; a demolding pipe is arranged at the position, positioned on the left side of the liquid pressing rod, of the top of the upper mold base in a penetrating and inserting manner; the sides, back to each other, of two gears are rotationally connected with a vibration wheel; a water baffle is arranged at the bottom of a vibration toothed rod; a mercury box is arranged at the bottom of the water baffle; a heat conduction block is arranged at the top of the mercury box in a penetrating and inserting manner; a circulation body is arranged in the mercurybox; the right side of the circulation body is in sliding connection with gas pushing plates; and a cam is arranged between the two gas pushing plates. According to the gas discharge mold used duringaluminum alloy casting, through cooperative usage of the circulation body and the mercury box, the effects that gas is removed in the liquid aluminum alloy cooling process, the situation that gas bubbles cannot rush out of aluminum alloy liquid due to the too small volume, and consequently a cavity skin is formed on the surface of a casting are avoided.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy casting, in particular to a mold for gas discharge during aluminum alloy casting. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in the industry. As an important material for the development of new materials, it has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries. Aluminum alloy can be used in various Different equipment smelting, coreless induction furnace and slot induction furnace, crucible furnace and reflection type open hearth furnace are often used. [0003] In the casting of aluminum alloy, since the liquid aluminum alloy will entrain air, after the liquid alloy is injected into the cavity mold, the solubility of air in the aluminum alloy will decrease during the process of the liquid alloy gradually cooling, and the gas will gradually overflow In the alumi...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a gas discharge mold for aluminum alloy casting, which can remove gas during the cooling process of liquid aluminum alloy, and can prevent the gas bubbles from being unable to punch out of the aluminum alloy due to their too small volume. Alloy liquid, and then form a hollow skin on the surface of the casting, which solves the problem that the existing air extraction method can only perform air extraction on the liquid aluminum alloy before it is poured into the cavity mold, and cannot be completely extracted to cause gas bubbles due to the body. The amount is too small to flush out the aluminum alloy liquid, and finally forms a problem of hollow skin

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