Casting molding sand and preparation method thereof

A molding sand and recycled sand technology, which is applied to casting molding equipment, casting molds, cores, etc., can solve the problems of poor air permeability, poor finish, and rough surface of aluminum sand parts, so as to achieve good air permeability and improve quality , the effect of reducing costs

Inactive Publication Date: 2012-12-12
HEFEI JAC CASTING
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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 o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: A kind of molding sand for foundry and its preparation method, according to the weight parts of composition raw material: Fly ash 70-80, recycled sand 15-20, quartz sand 20-25, sepiolite 2-4, bentonite 5-15, mullite sand 2-4, water glass 3-5, resin 5-7, steel fiber 2-4; according to the weight parts of the raw materials, the weight parts of the above raw materials are weighed and mixed uniformly to obtain casting sand.

Embodiment 2

[0009] Embodiment 2: a kind of molding sand for casting and its preparation method, according to the weight parts of composition raw material: fly ash 70, reuse sand 15, quartz sand 20, sepiolite 2, bentonite 5, mullite sand 2, Water glass 3, resin 5, steel fiber 2; weigh the parts by weight of the above raw materials according to the parts by weight of the raw materials and mix them uniformly to obtain casting sand.

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PUM

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Abstract

The invention discloses casting molding sand and a preparation method thereof. Raw materials in part by weight, i.e. 70-80 parts of pulverized coal ash, 15-20 parts of returned sand, 20-25 parts of quartz sand, 2-4 parts of sepiolite, 5-15 parts of bentonite, 2-4 parts of mullite sand, 3-5 parts of water glass, 5-7 parts of resin and 2-4 parts of steel fiber, are weighed and mixed evenly, and then, the casting molding sand is obtained. The casting molding sand has the advantages that the cost can be reduced, the air permeability is good, and the improvement on the quality of castings is favored.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a casting sand and a preparation method thereof. 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, resin sand, etc. according to t...

Claims

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Application Information

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IPC IPC(8): B22C1/00
Inventor 韦民叶天汉赵永征张莹黄光伟钱辉
Owner HEFEI JAC CASTING
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