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Environment-friendly casting sand

A kind of casting mold, environmental protection technology, applied in casting molding equipment, casting mold, core and other directions, can solve the problems of time-consuming, low cost, casting mold can not be reused, etc., to achieve excellent high temperature resistance, low cost, composition Environmentally friendly effect

Inactive Publication Date: 2018-02-27
东风精密铸造安徽有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage is that the cost is lower, because the sand used in the mold can be reused; the disadvantage is that the production of the mold is time-consuming, and the mold itself cannot be reused, and the finished product must be destroyed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] An environment-friendly foundry sand, which is composed of the following raw materials in parts by weight: 70 parts of quartz sand, 30 parts of dead burnt magnesia, 30 parts of fused leather sand, 9 parts of bentonite, 6 parts of corn flour, 3 parts of sawdust, rice bran 2 parts of powder, 45 parts of water, 20 parts of lightly burned powder, 9 parts of magnesium oxide, and 5 parts of thermal insulation covering agent.

[0016] Wherein, the thermal insulation covering agent is expanded graphite.

Embodiment 2

[0018] An environmentally friendly foundry sand, which is composed of the following raw materials in parts by weight: 88 parts of quartz sand, 40 parts of dead burnt magnesia, 40 parts of fused leather sand, 12 parts of bentonite, 9 parts of corn flour, 7 parts of sawdust, rice bran 5 parts of powder, 65 parts of water, 30 parts of lightly burned powder, 14 parts of magnesium oxide, and 14 parts of thermal insulation covering agent.

[0019] Wherein, the thermal insulation covering agent is expanded graphite.

Embodiment 3

[0021] An environment-friendly foundry sand, which is composed of the following raw materials in parts by weight: 82 parts of quartz sand, 35 parts of dead burnt magnesia, 35 parts of fused leather sand, 10 parts of bentonite, 7 parts of corn flour, 5 parts of sawdust, rice bran 3 parts of powder, 55 parts of water, 25 parts of lightly burned powder, 12 parts of magnesium oxide, and 9 parts of thermal insulation covering agent.

[0022] Wherein, the thermal insulation covering agent is expanded graphite.

[0023] The beneficial effects of the invention are as follows: (1) the composition of the molding sand is environmentally friendly, has no volatilized toxic gas, and has no adverse effects on the human body and the environment; (2) the molding sand has low cost and excellent high temperature resistance, and will not make the surface of the final casting Cracks and shrinkage cavities.

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PUM

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Abstract

The invention provides environment-friendly casting sand. The environment-friendly casting sand is prepared from the following raw materials in parts by weight: 70-88 parts of quartz sand, 30-40 partsof dead-burnt magnesite sand, 30-40 parts of fused magnesia, 9-12 parts of bentonite, 6-9 parts of corn flour, 3-7 parts of sawing processing wood dust, 2-5 parts of rice chaff powder, 45-65 parts ofwater, 20-30 parts of light-burnt powder, 9-14 parts of magnesium oxide and 5-14 parts of a heat-insulating covering agent. The environment-friendly casting sand has the beneficial effects that the components of the casting sand is environmentally friendly, no volatile toxic gas is generated, the casting sand is free of adverse harm to the human body and the environment, low in cost and excellentin resistance to high temperature; the surface of the final casting is free of cracks and shrinkage holes.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to an environment-friendly casting sand. Background technique [0002] Casting is the process of smelting metal into a liquid that meets certain requirements and pouring it into a mold, cooling and solidifying, and cleaning to obtain a casting with a predetermined shape, size and performance. Because the casting blank is almost shaped, the purpose of free machining or a small amount of machining reduces the cost and reduces the production time to a certain extent. Casting is one of the basic processes of the modern device manufacturing industry. [0003] Molding sand mainly includes sand casting and special casting. Ordinary sand casting uses sand as the mold material, also known as sand casting and foundry, including wet sand mold, dry sand mold and chemically hardened sand mold, but not all sand can be used for casting. The advantage is that the cost is lower, because the sand u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00
CPCB22C1/00
Inventor 鲁茂波
Owner 东风精密铸造安徽有限公司
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