Pouring system for permanent mold gravity casting aluminum piston

Abstract

The invention provides a pouring system for a permanent mold gravity casting aluminum piston, comprising a pouring cup, a vertical pouring gate, a horizontal pouring gate and an internal pouring gate, wherein a top end of the vertical pouring gate is communicated with an outlet of the pouring cup and the vertical pouring gate extends vertically; the horizontal pouring gate is communicated with a bottom end of the vertical pouring gate and extends horizontally; an inlet of the internal pouring gate is communicated with an outlet of the horizontal pouring gate and an outlet of the internal pouring gate is communicatied with a mold cavity of a piston mold; and cross sectional areas of the vertical pouring gate, the horizontal pouring gate and the internal pouring gate are increased in order. The minimum cross sectional areas of the vertical pouring gate, the horizontal pouring gate and the internal pouring gate in the pouring system are increased in order, so the pouring gate proportion of the vertical pouring gate, the horizontal pouring gate and the internal pouring gate is controlled strictly, and the pouring system becomes an open pouring system. Therefore, the mold filling speed of metal liquids at the outlet of the internal pouring gate can be reduced sufficiently to stabilize the mold filling process and the casting quality of an aluminum piston blank and decrease the defects of pinholes, slag inclusion, shrinkage porosity and the like of the piston blank, so that the process product yield of the piston blank can be improvd.

Description

technical field [0001] The invention relates to the technical field of metal mold gravity casting aluminum piston blanks, in particular to a casting system for metal mold gravity casting aluminum pistons. Background technique [0002] At present, the piston rough production of engine piston manufacturers still adopts aluminum alloy metal mold gravity casting. Gravity casting refers to the process of injecting molten metal into the mold under the action of gravity, also known as gravity casting. [0003] The casting system is the channel through which liquid metal flows into the mold cavity in gravity casting, which directly affects the casting quality. The existing aluminum piston casting system is mainly composed of sprue cups, sprues, runners, inner runners and other structures. The above-mentioned runners are not strictly controlled in the shape and ratio of the runners, which is arbitrary and cannot To ensure the stable filling of the molten metal, the casting quality w...

AI Technical Summary

Problems solved by technology

The existing aluminum piston casting system is mainly composed of sprue cups, sprues, runners, inner runners and other structures. The above-mentioned runners are not strictly controlled in the shape and ratio of the runners, which is arbitrary and cannot Guarantee the stable filling of the molten metal, so the casting quality will be unstable and random, resulting in pinholes, slag inclusions, shrinkage and other defects in the cast piston blank, which seriously reduces the process yield of the piston blank

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