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Casting method of aluminum alloy castings

A technology of aluminum alloy castings and aluminum alloys, applied in the field of aluminum alloy castings, can solve problems such as easy shrinkage, porosity and pinholes, difficulty in controlling the quality of aluminum alloy castings, and inability to return to the furnace for recycling, etc., to improve stability and order Good performance, good feeding effect, and the effect of reducing shrinkage and shrinkage defects

Inactive Publication Date: 2018-09-18
益阳仪纬科技有限公司
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] However, the quality of aluminum alloy castings produced by traditional low-pressure casting is difficult to control, and shrinkage, porosity, and pinholes are prone to occur; moreover, the runner consumes more molten aluminum, and this part of the aluminum block has more impurities, so it cannot be returned to the furnace for recycling. Cause serious waste of raw materials, high preparation cost

Method used

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Embodiment Construction

[0025] In order to facilitate understanding of the present invention, preferred embodiments of the present invention are given below. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0027] A casting method of an aluminum alloy casting, comprising the following steps:

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Abstract

The invention relates to a casting method of aluminum alloy castings. The casting method of aluminum alloy castings comprises the following steps of firstly, making a cope flask and a drag flask according to the shape of one casting, and carrying out coating treatment on the cope flask and the drag flask; secondly, carrying out mold assembly on the cope flask and the drag flask to form a cavity, and carrying out fastening treatment; thirdly, carrying out vacuum pumping treatment on the cavity; fourthly, filling the cavity with aluminum alloy molten metal with the injection speed ranging from 2m / s to 6m / s; fifthly, increasing the pressure of the cavity to 5 Mpa to 10 Mpa, and carrying out pressure maintaining treatment; sixthly, relieving the pressure of the cavity to the normal pressure after the casting formed in the cavity completely solidifies, separating the cope flask from the drag flask, and taking out the casting, namely, the aluminum alloy casting. The aluminum alloy castings prepared with the preparation method is good in surface quality and low in preparation cost.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy castings, in particular to a casting method of aluminum alloy castings. Background technique [0002] Cast aluminum alloy is a new type of metal material. Based on its low density and high specific strength, it is widely used in various industries such as machinery, automobiles, aviation, and aerospace. [0003] Casting is divided into gravity casting and pressure casting according to the pouring process of molten metal. Gravity casting refers to the process of pouring molten metal into the mold under its own gravity, also known as casting. Gravity casting includes sand casting, metal casting, investment casting, lost foam casting, mud casting, etc. Gravity casting relies on the gravity of molten metal to pour into the mold and flow in the cavity. The fluidity of molten aluminum is relatively poor, and the feeding ability of castings is low, which is prone to defects such as shrinkage cav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D21/04B22D27/13B22D18/04
CPCB22D18/04B22D21/04B22D27/13
Inventor 李凯谢昭民
Owner 益阳仪纬科技有限公司
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