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Special paint for evaporative pattern aluminum alloy and manufacturing method of special paint

A kind of lost foam, aluminum alloy technology, applied in the direction of manufacturing tools, coatings, casting and forming equipment, etc., can solve the problems of cold insulation, deformation, insufficient pouring, etc., and achieve the effect of reducing punching resistance

Inactive Publication Date: 2013-04-03
安徽中兴华汉机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is easy to produce casting defects such as cold shut, insufficient pouring, pinholes, pores, deformation, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] A special paint for lost foam aluminum alloy of the present invention contains: 40-70% of aluminosilicate, 5-25% of mica powder, 5-20% of talcum powder, 0.1-0.3% of industrial salt, 1.5-3 % latex powder, 1-1.5% artificial starch, 1.5-3% clay, 0.3-0.8% hydroxyethyl cellulose, 1-2% attapulgite, 0.2-0.8% sodium carbonate and 0.2-0.5% Sodium benzoate, and water that accounts for 40-50% of the total weight of the above ingredients.

[0020] A kind of method of the special coating of producing lost foam aluminum alloy of the present invention, it comprises the following steps:

[0021] (1) Grind 40-70% of aluminosilicate, 5-25% of mica powder and 5-20% of talc powder into particles with a particle size of 170-255 mesh and put them into the blender, and then mix 0.1- 0.3% industrial salt, 1-1.5% artificial starch, 1.5-3% clay, 0.3-0.8% hydroxyethyl cellulose, 1.5-3% latex powder, 1-2% attapulgite, 0.2-0.8 % sodium carbonate and 0.2-0.5% sodium benzoate are put into a blender...

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Abstract

The invention relates to special paint for an evaporative pattern aluminum alloy and a manufacturing method of the special paint. The special paint comprises the following components: 40-70% of aluminosilicate, 5-25% of mica powder, 5-20% of talcum powder, 0.1-0.3% of industrial salt, 1.5-3% of emulsion powder, 1-1.5% of artificial starch, 1.5-3% of argil, 0.3-0.8% of hydroxyethyl cellulose, 1-2% of attapulgite, 0.2-0.8% of sodium carbonate, 0.2-0.5% of sodium benzoate and water with the weight accounting for 40-50% of the total weight of the other components. The paint is good in suspension property, and does not settle; and the thickness of a single coated coating is between 0.4mm and 0.5mm. The paint can maintain good air permeability, has higher liquid penetrating capacity, is remarkable in thermal insulation effect, and does not crack easily due to a high solid-to-solution ratio. A coating of a cast complicated thin-wall aluminum alloy casting is easy to clear.

Description

technical field [0001] The invention relates to a coating and a manufacturing method thereof, in particular to a special coating for lost-foam aluminum alloy and a manufacturing method thereof. Background technique [0002] Traditional casting coatings only play a barrier role between castings and molds to prevent sand sticking. However, ordinary casting coatings are prone to sand sticking due to poor adhesion, low strength, poor fire resistance, and large gas generation at high temperatures. , Trachoma, porosity, carbon residue and other defects. Sand sticking in castings is because the coating does not effectively block and isolate, or the chemical reaction between the coating and the high-temperature metal liquid occurs. [0003] Special coating for lost foam aluminum alloy: aluminum alloy lost foam casting has been promoted in the trend of lightweighting of automobiles and vehicles, especially in Europe and the United States. Aluminum alloy lost foam casting is still in...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22C9/04
Inventor 孙月英王燕
Owner 安徽中兴华汉机械有限公司
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