Method for preparing solid-mold casting coating material

A solid casting and coating technology, which is applied in casting molding equipment, coatings, cores, etc., can solve the problems of inapplicable manual painting, unsuitable production, poor high temperature resistance, etc., and achieves good suspension and thixotropy. , The effect of low production cost and high anti-sticking ability

Inactive Publication Date: 2013-05-15
佛山市蓝林新材料科技有限公司
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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 sm

Method used

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Embodiment Construction

[0014] A method for preparing a solid casting coating, which consists of the following components in parts by weight (kg): 65 parts of rectorite powder, 7 parts of diatomite, 12 parts of tree ash, 12 parts of sodium bentonite, and nano-attapulgite 4 parts, 2 parts of sodium tripolyphosphate, 1.5 parts of sodium carboxymethyl cellulose, 7 parts of starch paste, 1.6 parts of silica sol, 1 part of nano-scale ceramic powder, 0.8 parts of iron oxide red powder, 3 parts of heavy calcium carbonate powder , 2 parts of loess, 65 parts of water, the preparation method comprises the following steps:

[0015] 1) Soak the diatomite 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, then After calcining at 500-530°C for 2-3 hours, add starch paste equivalent to 5% of its weight, 9% sodium hydroxide powder, and an appropriate amount of water to mix, granulate and pulv...

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Abstract

The invention discloses a method for preparing a solid-mold casting coating material. According to the method, the solid-mold casting coating material is prepared from the following ingredients in parts by weight: 65-75 parts of rectorite powder, 5-7 parts of diatomite, 10-12 parts of wood ash, 10-12 parts of sodium bentonite, 4-6 parts of nano attapulgite, 1-2 parts of sodium tripolyphosphate, 0.8-1.5 parts of sodium carboxymethyl cellulose, 5-7 parts of starch paste, 1.4-1.6 parts of silica sol, 1-2 parts of nanoscale ceramic powder, 0.5-0.8 part of red ferric oxide powder and 525-535 parts of water. The solid-mold casting coating material prepared by the method has high wear resistance and excellent gas permeability and quick-drying performance in both a high-temperature environment and a low-temperature environment, thereby meeting the production requirements of large-sized cast parts.

Description

technical field [0001] The invention relates to the field of casting, in particular to a method for preparing a solid 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, binders, 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 in time , the casting will p...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 夏坤财
Owner 佛山市蓝林新材料科技有限公司
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