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Preparation method of anti-burnt-on sand full-mold casting coating

A solid casting and sand-adhesive technology, which is applied to 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 suspending properties The effects of thixotropy, low production cost, and high sand-sticking resistance

Inactive Publication Date: 2013-05-15
BAZHONG SHENBANG BUILDING MATERIAL CO LTD
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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 sand-resistant full mold casting coating, which consists of the following components in parts by weight (kg): 56 parts of quartz powder, 7 parts of plant ash, 2 parts of hollow glass microspheres, 15 parts of water glass, graphite powder 10 parts, 6 parts of nano-attapulgite, 2 parts of lignosulfonic acid, 3 parts of polyvinyl alcohol, 0.8 parts of sodium carboxymethyl cellulose, 0.6 parts of sodium benzoate, 2 parts of nano-sized ceramic powder, 0.8 part of iron oxide powder, 1 part of trisodium phosphate, 5 parts of palygorskite clay, 55 parts of water, the preparation method comprises the steps:

[0015] 1) Soak plant ash with 15% hydrochloric acid for 3-4 hours, wash with deionized water, then soak with 12% sodium hydroxide solution for 3-4 hours, then wash with deionized water until neutral, filter and mix evenly with water glass Finally, it is wrapped outside the hollow glass microspheres to form glass microspheres wrapped particles;

[0...

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Abstract

The invention discloses a preparation method of an anti-burnt-on sand full-mold casting coating. The coating comprises the following components in parts by weight: 56-70 parts of quartz powder, 5-7 parts of plant ash, 1-2 parts of hollow glass beads, 10-15 parts of sodium silicate, 10-15 parts of graphite powder, 4-6 parts of nano attapulgite, 1-2 parts of lignosulfonic acid, 2-3 parts of polyving akohol, 0.8-1.5 parts of sodium carboxymethyl cellulose, 0.4-0.6 part of sodium benzoate, 1-2 parts of nano ceramic powder, 0.5-0.8 part of ferric oxide powder and 525-535 parts of water. The coating is a full-mold casting coating with strong abrasion resistance, high adhesiveness, excellent air permeability and rapid drying capability in both high temperature and low temperature environments, so that the requirements of production of large-sized casts are met.

Description

technical field [0001] The invention relates to the field of casting, in particular to a preparation method of a sand-sticking-resistant full mold casting coating. 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...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 夏坤财
Owner BAZHONG SHENBANG BUILDING MATERIAL CO LTD
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