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Molding sand for casting and preparation method thereof

A kind of molding sand, a new type of technology, applied in casting molding equipment, casting molds, cores, etc., can solve the problems of easy bonding, rough surface of castings, difficult to peel off castings, etc., and achieve the effect of low cost and simple preparation method.

Inactive Publication Date: 2018-01-09
XUZHOU DONGLI FORGING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the molding sand on the market is easy to bond, which makes the casting difficult to peel off and makes the surface of the casting rough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A casting sand and a preparation method thereof, which consist of the following components in parts by weight: 50 parts of ordinary new sand, 10 parts of ordinary old sand, 2 parts of starch, 10 parts of pottery clay, 2 parts of quicklime, 5 parts of cement, 5 parts of bentonite, 5 parts of diatomaceous earth, and the balance of water.

[0017] The preparation method comprises the following steps:

[0018] 1) Weigh 2 parts of starch, 10 parts of pottery clay, 2 parts of quicklime, 5 parts of diatomaceous earth according to the proportion, add water and soak for 5 hours;

[0019] 2) Stir the mixture in step 1) to obtain mixed solution A;

[0020] 3) Weigh 50 parts of ordinary new sand, 10 parts of ordinary old sand, and 5 parts of bentonite according to the proportion, add water and soak for 2 hours;

[0021] 4) Stir the mixture in step 3) to obtain the mixed solution B;

[0022] 5) Stir the mixed solution A, mixed solution B with water, and let it stand for 1 hour; ...

Embodiment 2

[0027] A molding sand for casting and a preparation method thereof, comprising the following components in parts by weight: 70 parts of ordinary new sand, 20 parts of ordinary old sand, 5 parts of starch, 15 parts of pottery clay, 5 parts of quicklime, 10 parts of cement, 10 parts of bentonite, 10 parts of diatomaceous earth, and the balance of water.

[0028] The preparation method comprises the following steps:

[0029] 1) Weigh 5 parts of starch, 15 parts of clay, 5 parts of quicklime, and 10 parts of diatomaceous earth according to the proportion, add water and soak for 8 hours;

[0030] 2) Stir the mixture in step 1) to obtain mixed solution A;

[0031] 3) Weigh 70 parts of ordinary new sand, 20 parts of ordinary old sand, and 10 parts of bentonite according to the proportion, add water and soak for 4 hours;

[0032] 4) Stir the mixture in step 3) to obtain the mixed solution B;

[0033] 5) Stir the mixed solution A, mixed solution B with water, and let stand for 2 hou...

Embodiment 3

[0038] A molding sand for casting and a preparation method thereof, consisting of the following components in parts by weight: 60 parts of ordinary new sand, 15 parts of ordinary old sand, 4 parts of starch, 12 parts of pottery clay, 3 parts of quicklime, 8 parts of cement, 8 parts of bentonite, 7 parts of diatomaceous earth, and the balance of water.

[0039] The preparation method comprises the following steps:

[0040] 1) Weigh 4 parts of starch, 12 parts of clay, 3 parts of quicklime, and 7 parts of diatomaceous earth according to the proportion, add water and soak for 7 hours;

[0041] 2) Stir the mixture in step 1) to obtain mixed solution A;

[0042] 3) Weigh 60 parts of ordinary new sand, 15 parts of ordinary old sand, and 8 parts of bentonite according to the proportion, add water and soak for 3 hours;

[0043] 4) Stir the mixture in step 3) to obtain the mixed solution B;

[0044] 5) Stir the mixed solution A, mixed solution B with water, and let stand for 1.5 hou...

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Abstract

The invention relates to molding sand for casting and a preparation method thereof. The molding sand is composed of the components of, by weight, 50-70 parts of ordinary new molding sand, 10-20 partsof novel original molding sand, 2-5 parts of starch, 10-15 parts of argil, 2-5 parts of quick lime, 5-10 parts of cement, 5-10 parts of bentonite, 5-10 parts of kieselguhr and the balance water. The molding sand for casting and the preparation method thereof have the beneficial effects that aiming at the defects existing in the prior art, in the casting process, poisonous and polluting harmful gasis not generated, the cost is low, all the components are resistant to the high temperature, the preparation method is simple, the needs of casting of steel castings can be met, thus the waste ratioof the castings is decreased by up to 35%, and the molding sand for casting and the preparation method thereof are suitable for large-scale popularization.

Description

technical field [0001] The invention relates to the field of molding sand casting, in particular to a casting molding sand and a preparation method thereof. Background technique [0002] Molding sand is a material used for modeling in casting. Molding sand is generally made by mixing molding materials such as raw sand for casting, molding sand binder and auxiliary additives in a certain proportion. The role of molding sand in foundry production is extremely important. It directly affects the energy consumption and environmental pollution of foundry production, as well as the quality, production efficiency and cost of castings. The casting waste caused by poor quality of molding sand accounts for about 30-50% of the total casting waste. Most of the molding sand on the market is easy to bond, which makes the casting difficult to peel off and makes the surface of the casting rough. Contents of the invention [0003] The purpose of the present invention is to solve the defi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00
Inventor 张道成
Owner XUZHOU DONGLI FORGING MACHINERY
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