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Clay green sand for high-pressure molding and preparation method thereof

A technology of green sand and clay, applied in the direction of casting molding equipment, molds, cores, etc., can solve the problems of casting pores, increased sand inclusions, sand molds are easily broken and damaged, and the quality of high-pressure molding line castings cannot be guaranteed, so as to reduce sand molds damage, good anti-sticking sand, low effect of anti-sand inclusion

Inactive Publication Date: 2014-02-12
TONGLING JINGWEI FLUID SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the molding sand of the prior art is used for high-pressure molding, the sand mold is easily broken and damaged, and defects such as pores and sand inclusions in the casting increase, so that the normal production of the high-pressure molding line and the quality of the casting cannot be guaranteed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] A green clay molding sand for high-pressure molding, which is composed of the following raw materials in weight (kg): zircon sand 60, chromite sand 40, bentonite 10, pottery clay 8, calcium sulfate whisker 4, calcium lignosulfonate 2, laurel Alcohol polyoxyethylene ether 1.5, polyethylene oxide 2, iron oxide red 1, furnace ash 6, aluminum silicate fiber 4, composite powder 3, water 7;

[0013] The preparation method of the composite powder is as follows: a. Take perlite, fluorite and barite in a weight ratio of 5:5:3, mix them uniformly, pulverize them through a 150 mesh sieve, and then add water to beat to make a solid content of 60%. Slurry, high-speed ball milling for 2 hours, spray drying; b. Add 4% coconut shell powder, 2% calcium fluoride, 1.5% coal powder and 0.6% yttrium oxide to the spray-dried powder, and calcined at 860°C for 40min , and then heated to 1230°C for calcination for 2 hours, quenched in water, then placed in a 15% hydrochloric acid solution, hea...

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Abstract

The invention discloses clay green sand for high-pressure molding and a preparation method thereof. The clay green sand is prepared from the following raw materials in parts by weight: 50-70 parts of zircon sand, 30-40 parts of chromite sand, 8-12 parts of bentonite, 5-10 parts of pottery, 3-6 parts of calcium sulfate crystal whiskers, 2-3 parts of calcium lignosulphonate, 1-2 parts of lauryl alcohol polyoxyethylene, 1.5-2.5 parts of polyoxyethylene, 1-2 parts of iron oxide red, 4-8 parts of stove ash slag, 3-5 parts of aluminum silicate fibers, 2-4 parts of composite powder and 5-10 parts of water. The molding sand disclosed by the invention is added with the aluminum silicate fibers and the calcium sulfate crystal whiskers, so that strength and toughness of the molding sand can be improved, damages to a sand mould during drawing are reduced; moreover, the molding sand further has good ability of preventing burnt-on sand and sand inclusion as well as low evolution rate, good gas permeability, and the like, can be used for effectively avoiding the defects such as gas pores and sand inclusion of a casting piece, and improving the production efficiency of a high-pressure molding line and the quality of the casting piece.

Description

technical field [0001] The invention relates to a molding sand and a preparation method thereof, in particular to a clay green molding sand for high-pressure molding and a preparation method thereof. Background technique [0002] High-pressure molding is to put the molding sand at 7kg / cm 3 The above is a modeling method that is more compact than pressing. Compared with ordinary molding, high-pressure molding has the advantages of high precision casting size, good surface quality, high production efficiency, and good working conditions. However, when the molding sand of the prior art is used for high-pressure molding, the sand mold is easily broken and damaged, and defects such as pores and sand inclusions in the casting increase, so that the normal production of the high-pressure molding line and the quality of the casting cannot be guaranteed. Contents of the invention [0003] The object of the present invention is to provide a clay green sand for high-pressure moldin...

Claims

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Application Information

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IPC IPC(8): B22C1/00B22C1/02
Inventor 吴寿涛
Owner TONGLING JINGWEI FLUID SCI & TECH
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