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Mixed casting molding sand and preparation method thereof

A casting mold and quartz sand technology, which is applied to casting molding equipment, casting molds, cores, etc., can solve the problems of poor finish, rough surface of aluminum sand parts, poor air permeability, etc., and achieve good air permeability and smooth surface , The effect of simple preparation method

Inactive Publication Date: 2012-03-21
邹平县永通金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Molding sand is a material used for molding in sand casting. Molding sand is generally made of casting sand, molding sand binder and auxiliary additives and other molding materials mixed in a certain proportion. Natural silica sand containing clay can also be used. Usually, it is used for aluminum casting. In the molding sand formula, the particle size of the molding sand is too large or too small, and the diameter of the molding sand is too large. Although the air permeability is good, the surface of the aluminum sand parts is rough and the finish is not good. The diameter of the molding sand is too small, resulting in poor air permeability of the sand mold. Aluminum castings have pores and are easy to produce

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Mixed foundry sand, the weight parts of its constituent raw materials are: 80 parts of quartz sand, 20 parts of perlite, 10 parts of resin sand, 5 parts of attapulgite, 3 parts of paraffin, 3 parts of asbestos, 3 parts of furan resin, 1.2 parts of phenolic resin , 0.5 parts of bentonite, 3 parts of kaolin, 0.05 parts of potassium dichromate and 2 parts of moisture.

[0012] The preparation method of mixed casting sand includes the following steps:

[0013] (1) Pass the quartz sand, perlite and resin sand through a 100 mesh sieve, and then mix the quartz sand, perlite, resin sand, attapulgite, paraffin, asbestos, furan resin, phenolic resin, bentonite, Kaolin and potassium dichromate, dry-mix for 10-20 seconds, then add water and mix for 1-3 minutes, and put sand for 15-25 seconds after mixing;

[0014] (2) Put the mixture obtained in step (1) into a sand storage hopper, shape, cast and cool for 1-1.5 hours, and separate to obtain finished products.

Embodiment 2

[0015] Example 2: Mixed casting sand, the weight parts of its constituent raw materials are: 85 parts of quartz sand, 25 parts of perlite, 15 parts of resin sand, 10 parts of attapulgite, 4 parts of paraffin wax, 4 parts of asbestos, 4 parts of furan resin, 1.5 parts of phenolic resin , 1 part of bentonite, 4 parts of kaolin, 0.08 parts of potassium dichromate and 3.5 parts of moisture.

[0016] The preparation method of mixed casting sand includes the following steps:

[0017] (1) Pass the quartz sand, perlite and resin sand through a 100 mesh sieve, and then mix the quartz sand, perlite, resin sand, attapulgite, paraffin, asbestos, furan resin, phenolic resin, bentonite, Kaolin and potassium dichromate, dry-mix for 10-20 seconds, then add water and mix for 1-3 minutes, and put sand for 15-25 seconds after mixing;

[0018] (2) Put the mixture obtained in step (1) into a sand storage hopper, shape, cast and cool for 1-1.5 hours, and separate to obtain finished products.

Embodiment 3

[0019] Example 3: Mixed foundry sand, the weight parts of its constituent raw materials are: 90 parts of quartz sand, 30 parts of perlite, 20 parts of resin sand, 15 parts of attapulgite, 5 parts of paraffin, 5 parts of asbestos, 5 parts of furan resin, 1.8 parts of phenolic resin , 1.5 parts of bentonite, 5 parts of kaolin, 0.1 part of potassium dichromate and 5 parts of moisture.

[0020] The preparation method of mixed casting sand includes the following steps:

[0021] (1) Pass the quartz sand, perlite and resin sand through a 100 mesh sieve, and then mix the quartz sand, perlite, resin sand, attapulgite, paraffin, asbestos, furan resin, phenolic resin, bentonite, Kaolin and potassium dichromate, dry-mix for 10-20 seconds, then add water and mix for 1-3 minutes, and put sand for 15-25 seconds after mixing

[0022] (2) Put the mixture obtained in step (1) into a sand storage hopper, shape, cast and cool for 1-1.5 hours, and separate to obtain finished products.

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Abstract

The invention discloses a mixed casting molding sand and a preparation method thereof. The preparation method mainly comprises: performing dry mixing of component raw materials including quartz sand, attapulgite, wax, asbestos, a furan resin, a phenolic resin, bentonite and potassium dichromate by certain weight parts; and adding water, mixing, placing sand, molding, casting, cooling and separating to obtain finished product. The preparation method of the invention is simple, the formula is reasonable, the cost is low, the production efficiency is high, the surface of an aluminum sand piece is made smooth by strictly controlling the particle size of quartz sand, and the breathability is high.

Description

technical field [0001] The invention relates to a mixed casting mold sand and a preparation method thereof, belonging to the field of foundry industry. Background technique [0002] Molding sand is a material used for molding in sand casting. Molding sand is generally made of casting sand, molding sand binder and auxiliary additives and other molding materials mixed in a certain proportion. Natural silica sand containing clay can also be used. Usually, it is used for aluminum casting. In the molding sand formula, the particle size of the molding sand is too large or too small, and the diameter of the molding sand is too large. Although the air permeability is good, the surface of the aluminum sand parts is rough and the finish is not good. The diameter of the molding sand is too small, resulting in poor air permeability of the sand mold. Aluminum castings have good porosity. Molding sand can be divided into clay sand, water glass sand, cement sand, quartz sand, etc. accordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/18
Inventor 张勇
Owner 邹平县永通金属材料有限公司
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