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Preparation method of high-strength full mold casting coating

A solid casting, high-strength technology, applied in casting molding equipment, coatings, casting molds, etc., can solve the problems of inability to apply manual brushing, inability to adapt to production, poor high temperature resistance, etc., and achieve good suspension and touch The effects of denaturation, low production cost, and high anti-sand sticking ability

Active Publication Date: 2013-05-15
南京辉腾机械铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The high temperature resistance of the casting coating in the prior art is relatively poor, and it can only be suitable for the production of small parts (within 200kg) with short high temperature treatment time, and cannot adapt to the production of large castings (within 20 tons) and small batches of manual operations
It has high temperature resistance and can be applied to the production process of large castings, but its manufacturing cost is high, and it cannot be applied to manual painting. The paint is black, which is easy to cause black pollution in the working environment

Method used

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Embodiment Construction

[0014] A method for preparing a high-strength solid casting coating, which consists of the following components in parts by weight (kg): 63 parts of high-alumina bauxite clinker, 7 parts of tree ash, 12 parts of water glass, 10 parts of sodium bentonite, 4 parts of nano-attapulgite, 1 part of lignosulfonic acid, 3 parts of polyvinyl alcohol, 1.5 parts of sodium carboxymethyl cellulose, 0.4 parts of sodium benzoate, 2 parts of nano-scale ceramic powder, 0.8 parts of iron oxide red powder, 3 parts of olivine powder Parts, 2 parts of hollow glass microspheres, 59 parts of water, described preparation method comprises the steps:

[0015] 1) Soak tree ash with 10-15% sulfuric acid for 3-4 hours, wash with deionized water, then soak with 10-12% sodium hydroxide solution for 3-4 hours, then wash with deionized water until neutral, and then Calcined at 500-530°C for 2-3 hours, crushed into modified tree ash;

[0016] 2) Mix the modified tree ashes obtained in the above steps with nan...

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Abstract

The invention discloses a preparation method of a high-strength full mold casting coating. The high-strength full mold casting coating comprises the following components in parts by weight: 63-70 parts of high-alumina bauxite clinker, 5-7 parts of plant ash, 10-12 parts of water glass, 10-12 parts of sodium bentonite, 4-6 parts of nano-attapulgite, 1-2 parts of lignosulfonic acid, 2-3 parts of polyvinyl alcohol, 0.8-1.5 parts of sodium carboxymethyl cellulose, 0.4-0.6 part of sodium benzoate, 1-2 parts of nano-scale ceramic powder, 0.5-0.8 part of iron oxide red powder and 525-535 parts of water. The coating disclosed by the invention is of the full mold casting coating with strong corrosion resistance, high adhesiveness, excellent air permeability and quick-drying property under high-temperature and low-temperature environments, and can meet the production requirements of large-scale casts.

Description

technical field [0001] The invention relates to the field of casting, in particular to a preparation method of a high-strength full mold casting paint. Background technique [0002] The solid casting coating is a dispersion system composed of a variety of materials with different properties. Its composition mainly includes refractory materials, polyvinyl alcohol, carriers, nano-attapulgite and special additives. The coating needs to have good process performance and work performance. , quality stability and application reproducibility. The solid casting paint is coated on the outer surface of the foam plastic model, and the molding can only be poured after the paint is dry. Foamed plastics are airtight, have a low heat distortion temperature (about 70°C), and have poor affinity for water; foamed plastics are heated and melted, and after gasification, there are many liquid residues and a large amount of gas generation. If these gases and liquid residues cannot be discharged ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 夏坤财
Owner 南京辉腾机械铸造有限公司
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