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Preparing method of aluminium alloy casting moulding sand

A casting mold and used sand technology, applied in the field of aluminum alloy casting, can solve the problems of reducing aluminum alloy casting defects, and achieve the effects of improving the yield of castings, less emissions, and excellent collapsibility.

Active Publication Date: 2014-09-03
湖南精量重工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, one of the objects of the present invention is to provide a method for preparing aluminum alloy casting sand, which does not use fly ash as a binder, reduces environmental pollution, and makes the The casting defects of aluminum alloy are greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing aluminum alloy casting sand. The casting sand prepared by the method comprises the following raw materials in parts by weight: 60 parts of new quartz raw sand, 28 parts of old quartz raw sand, 3 parts of electrolytic aluminum slag powder, zircon 6 parts of sand, 1 part of hollow microspheres, 18 parts of binder slurry, and 22 parts of water; among them, the particle size of the new quartz sand is 100-200 mesh, and the particle size of the old quartz sand is 150-250 mesh. The particle size of the aluminum slag powder and zircon sand is -300 mesh, the particle size of the hollow microsphere is about 10-60 μm, and the binder is composed of the following components in weight percentage: 36% starch, 8% furan resin, calcium base 14% of bentonite, 5% of bagasse cellulose powder of -100 mesh, 1% of zinc stearate, 3% of sodium tripolyphosphate, and the balance is water; the preparation method of the foundry sand comprises the following steps:

[0023] 1) P...

Embodiment 2

[0029] A method for preparing aluminum alloy casting sand. The casting sand prepared by the method comprises the following raw materials in parts by weight: 64 parts of new quartz raw sand, 24 parts of old quartz raw sand, 5 parts of electrolytic aluminum slag powder, zircon 4 parts of sand, 6 parts of hollow microspheres, 16 parts of binder slurry, and 26 parts of water; among them, the particle size of the new quartz sand is 100-200 mesh, and the particle size of the old quartz sand is 150-250 mesh. The particle size of the aluminum slag powder and zircon sand is -300 mesh, the particle size of the hollow microsphere is about 10-60 μm, and the binder is composed of the following components in weight percentage: 40% starch, 6% furan resin, calcium base 16% of bentonite, 3% of bagasse cellulose powder of -100 mesh, 2% of zinc stearate, 2% of sodium tripolyphosphate, and the balance is water; the preparation method of the foundry sand comprises the following steps:

[0030] 1) ...

Embodiment 3

[0036]A method for preparing aluminum alloy casting sand. The casting sand prepared by the method comprises the following raw materials in parts by weight: 62 parts of new quartz raw sand, 26 parts of old quartz raw sand, 4 parts of electrolytic aluminum slag powder, zircon 5 parts of sand, 3 parts of hollow microspheres, 17 parts of binder slurry, and 24 parts of water; among them, the particle size of the new quartz sand is 100-200 mesh, and the particle size of the old quartz sand is 150-250 mesh. The particle size of the aluminum slag powder and zircon sand is -300 mesh, the particle size of the hollow microsphere is about 10-60 μm, and the binder is composed of the following components in weight percentage: 38% starch, 4% furan resin, calcium base 15% of bentonite, 4% of bagasse cellulose powder of -100 mesh, 1.5% of zinc stearate, 2.3% of sodium tripolyphosphate, and the balance is water; the preparation method of the foundry sand comprises the following steps:

[0037] ...

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Abstract

The invention discloses a preparing method of aluminium alloy casting moulding sand. New quartz roughing sand, used quartz roughing sand, zircon sand, electrolytic aluminium slag powder, hollow microspheres and a binder are adopted as components of the moulding sand, wherein the binder is novel in design and is prepared by blending starch, furan resin, calcium bentonite, bagasse cellulose powder, zinc stearate and sodium tripolyphosphate, and steps and parameters of the preparing method are optimized according to the components of the moulding sand. Therefore, the prepared moulding sand has characteristics of good refractoriness, high gas permeability, good collapsibility, and capability of reducing casting defects and making casting surfaces clean and smooth. By adoption of the moulding sand for casting aluminum alloy castings, the rate of defects comprising sand burning, air holes, cracks, cold shut, shrinkage cavity, looseness, and the like is lower than 3%, the yield of finished product of the castings is largely increased and the casting cost is reduced.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy casting. Background technique [0002] The role of molding sand in foundry production is extremely important, and casting waste products caused by poor quality of molding sand account for about 30-50% of the total casting waste products. The usual requirements for molding sand are: 1. High strength and thermal stability to withstand various external forces and high temperatures. 2. Good fluidity, that is, the ability of the molding sand to move between sand particles under the action of external force or its own gravity. 3. Certain plasticity, that is, the ability of molding sand to deform under the action of external force and maintain the given shape when the external force is removed. 4. Better air permeability, that is, the ability of the pores of the molding sand to pass through the gas. 5. High collapsibility, also known as sand production, that is, whether the molding sand is easy...

Claims

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Application Information

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IPC IPC(8): B22C1/00B22C1/26B22C1/02
Inventor 朱小英
Owner 湖南精量重工科技有限公司
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