Alcohol-group dry powder sand mould foundry coating

A casting coating and backbone technology, applied in casting molding equipment, coatings, casting molds, etc., can solve problems such as the inability to use steel castings and large iron castings, limit the scope of use of coatings, and reduce the refractoriness of coatings. Brushability, good dissociation characteristics, effect of improving stability

Inactive Publication Date: 2013-01-16
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent (application number: 86105456) discloses a lithium-based bentonite zircon powder powder casting coating, the raw materials such as lithium-based bentonite, zirconium quartz powder, resin and titanium dioxide are mixed and milled to make a powder coating. When directly adding ethanol to dilute into a slurry paint, but because the lithium-based bentonite has not caused swelling, the suspension of the paint is poor
Chinese patent (application number: 200910189788.4) discloses a preparation method of alcohol-based nano-composite and surface-modified dry powder casting coatings, by using nano-layered clay and nano-SiO 2 Compose a composite suspending agent, and then mix and grind it with refractory powder, binder and other additives to form alcohol-based dry powder coatings. The preparation process requires high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1

[0019] Weigh 75 kg of bauxite, 5 kg of amorphous graphite, 8 kg of flake graphite, 3 kg of iron red, 5 kg of attapulgite, 0.9 kg of sodium bentonite, 2.5 kg of polyvinyl butyral, Oxyethylene ether 0.3 kg, aliphatic dicarboxylic acid 0.3 kg. Among them, the particle size of bauxite, attapulgite, sodium bentonite, amorphous graphite, flake graphite and iron red is 200~300 mesh. Put the above components into a mill, mix and grind for 120 minutes to obtain the product.

Example Embodiment

[0020] Example 2

[0021] Weigh 65 kg of bauxite, 8 kg of amorphous graphite, 12 kg of flake graphite, 8 kg of iron red, 3.6 kg of attapulgite, 1.0 kg of sodium bentonite, 2 kg of polyvinyl butyral, Oxyethylene ether 0.2 kg, aliphatic dicarboxylic acid 0.2 kg, of which the particle size of bauxite, attapulgite, sodium bentonite, amorphous graphite, flake graphite and iron red is 200~300 mesh. Put the above components into a mill, mix and grind for 60 minutes to obtain the product.

Example Embodiment

[0022] Example 3

[0023] Weigh 70 kg of bauxite, 8 kg of amorphous graphite, 10 kg of flake graphite, 3 kg of iron red, 4 kg of attapulgite, 1.2 kg of sodium bentonite, 3 kg of polyvinyl butyral, Oxyethylene ether 0.4 kg, polyacrylic acid 0.4 kg. Among them, the particle size of bauxite, attapulgite, sodium bentonite, amorphous graphite, flake graphite and iron red is 200~300 mesh. Put the above components into a mill, mix and grind for 90 minutes to obtain the product.

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Abstract

The invention discloses alcohol-group dry powder sand mould foundry coating, which comprises the following components in percentage by weight: 60-75% of bauxite, 2-10% of amorphous graphite, 3-15% of lamellar graphite, 2-10% of iron oxide red, 1-5% of attapulgite, 0.5-1.5% of sodium bentonite, 1-5% of polyvinyl butyral, 0.1-0.5% of surfactant and 0.1-0.5% of dispersing agent. The dry powder coating has the advantages of simple preparation technology, convenience in use and good high-temperature sand adhesiveness resistance.

Description

technical field [0001] The invention relates to an auxiliary material for casting molding, in particular to an alcohol-based dry powder casting coating for sand casting. Background technique [0002] Coating a layer of casting paint on the working surface of the casting sand mold (core) can effectively prevent and reduce the gradual surface sticking of sand, sand inclusions, sand holes and other defects, and reduce the surface roughness of the casting. The quality of casting coating is the most direct factor that affects whether the casting is sand-sticking, sand inclusion, surface finish of the casting, and dimensional accuracy of the casting. There are many kinds of casting coatings, which can be roughly divided into two categories: water-based coatings and alcohol-based coatings. Among them, the alcohol-based coating can be cured after being coated and ignited. It can be used in conjunction with various self-hardening sand processes without drying, which can shorten ...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 刘斌姚义俊沈国柱苏义盛群楼之栋
Owner NANJING UNIV OF INFORMATION SCI & TECH
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