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Green sand for nonferrous alloy casting and preparation method thereof

A non-ferrous alloy and green sand technology, which is applied in the direction of casting molding equipment, casting molds, metal processing equipment, etc., can solve the problems of non-ferrous alloy casting scrap, sand sticking, roughness, etc. reasonable effect

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

The non-ferrous alloy castings of green sand casting in the prior art have defects such as sticky sand and roughness on the surface, causing the non-ferrous alloy castings to be scrapped

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A green sand for non-ferrous alloy castings, which is composed of the following raw materials in weight (kg): recycled sand 70, kyanite sand 30, kaolin 7, waste tourmaline powder 4, composite powder 3, polystyrene powder 4, corn flour 2. Castor oil 2.5, glass fiber 1, sodium polyacrylate 1.5, desulfurization ash 2, water 6;

[0014] The preparation method of the composite powder is as follows: a. Take perlite, fluorite and barite in a weight ratio of 7:5:3, 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 3 hours, spray drying; b. Add 4% coconut shell powder, 3% calcium fluoride, 1.5% coal powder and 0.6% yttrium oxide to the spray-dried powder, and calcined at 880°C for 30 minutes , and then heated to 1240°C for calcination for 2 hours, quenched in water, then placed in a hydrochloric acid solution with a concentration of 18%, heated to boiling and ground at ...

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Abstract

The invention discloses green sand for nonferrous alloy casting and a preparation method thereof. The green sand is prepared from the following raw materials in parts by weight: 65-75 parts of recycling sand, 25-35 parts of kyanite sand, 5-10 parts of kaolin, 3-6 parts of waste tourmaline powder, 2-4 parts of composite powder, 3-5 parts of polystyrene powder, 1.5-2.5 parts of corn flour, 2-3 parts of castor oil, 0.5-1.5 parts of glass fiber, 1-2 parts of sodium polyacrylate, 2-3 parts of desulfurized fly ash and 4-8 parts of water. The molding sand is reasonable in formula and low in cost, the sand adhesion defect on the surface of the casting can be overcome, and the surface smoothness of the casting can be improved. Moreover, the green sand is high in strength, low in air release amount, high in air permeability effect and high in liquidity and has huge economic benefits, and the yield of the green sand for nonferrous alloy casting is greatly improved.

Description

technical field [0001] The invention relates to molding sand and a preparation method thereof, in particular to green molding sand for non-ferrous alloy castings and a preparation method thereof. Background technique [0002] Molding sand is the material used for molding in the casting process. It is generally made by mixing molding materials such as raw sand for casting, molding sand binder and auxiliary additives in a certain proportion. The quality of molding sand directly affects the performance of castings, such as sand holes, pores, sand inclusions, sand sticking, cracks and other defects. The non-ferrous alloy castings of green sand casting in the prior art have defects such as sticky sand and roughness on the surface, causing the non-ferrous alloy castings to be scrapped. Contents of the invention [0003] The object of the present invention is to aim at the deficiencies in the prior art, to provide a green sand for non-ferrous alloy castings with a smooth surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00
Inventor 吴寿涛
Owner TONGLING JINGWEI FLUID SCI & TECH
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