Claw-shaped circumferential equal-division type pouring system for aluminum alloy shell and pouring method of claw-shaped circumferential equal-division type pouring system

Abstract

An aluminum alloy shell claw-shaped circumferential equant pouring system and a pouring method thereof are characterized in that the shapes and sizes of a riser tube, a cross gate and an ingate are reasonably set, impact of molten aluminum and a cavity wall is reduced, it is guaranteed that the casting mold filling process is stable and effective, solidification feeding is facilitated, and therefore the shrinkage porosity and shrinkage cavity defects in the casting production process are reduced, and the casting quality is improved. And the casting blank rejection rate is reduced. And the solidification time is greatly shortened by reducing the contact area of the flow gate and the bottom of the casting. The casting mold has high practicability, and the forming quality and production efficiency of castings can be effectively improved. And the device is simple in structure and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of low-pressure casting of aluminum alloys, in particular to a casting technology of a claw-shaped aluminum alloy shell, in particular to a claw-shaped circumferential bisected casting system of an aluminum alloy shell and a casting method thereof. Background technique [0002] Aluminum alloy has the advantages of light weight, corrosion resistance and good thermal conductivity, and has been widely used in lightweight technology in recent years. The traditional shell is mostly made of ductile iron by gravity casting, which is heavy and prone to casting defects. Shell casting is one of the key components in the mechanical transmission system, and its quality directly affects the performance and service life of the whole machine. [0003] Low-pressure casting is an advanced anti-gravity casting technology. It uses low air pressure to press the alloy liquid into the gating system and the cavity, and feed and f...

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the aluminum alloy shell with large volume, large average wall thickness and unevenness. During the casting process, the thin wall part is easy to solidify in advance, which is not conducive to the feeding of the alloy liquid, and the thick wall part is easy to form thermal junctions, especially in the casting process. When the traditional gating system is used, most of the bottom of the casting cavity has a large contact area with the inner runner, and finally solidifies and the heat dissipation is slow. In actual production, defects such as shrinkage and shrinkage are very easy to occur, which reduces the performance of the alloy and affects production. In order to solve the problem of efficiency, an aluminum alloy shell claw-shaped circumferential equal-section pouring system and its pouring method with simple structure, stable filling, and improved quality of casting blanks were invented

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