Method for preparing full-mold casting coating

A technology of solid casting and coating, which is applied to casting molding equipment, coatings, casting molds, etc. It can solve the problems of black pollution in the working environment, high manufacturing cost, and inability to apply manual brushing, etc. It achieves high surface strength and is easy to operate , good suspension and thixotropy effect

Active Publication Date: 2012-06-20
南通市通州区俊朗建筑工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The paint has high temperature resistance and is suitable for the production process of large castings, but its manufacturing cost i...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing a full mold casting coating, the coating consists of the following components in parts by weight: 70 parts of quartz powder, 15 parts of olivine powder, 10 parts of corundum powder, 6 parts of sodium bentonite, 1 part of lignosulfonic acid, 3 parts of dextrin powder, 0.8 parts of sodium carboxymethyl cellulose, 0.6 parts of sodium benzoate, 1 part of hollow glass microspheres, 9 parts of aluminum sulfate, 4 parts of polyvinyl alcohol, 6 parts of silica sol, 0.5 parts of iron oxide powder, 0.06 part of octanol, 15 parts of water; Described preparation method comprises the steps:

[0020] 1) Mix sodium-based bentonite and dextrin powder with an appropriate amount of water, stir evenly, and let stand for 36 hours to obtain a sodium-based bentonite and dextrin powder-water mixture;

[0021] 2) Mix polyvinyl alcohol with an appropriate amount of water, stir well, then let it stand for 30 minutes, then slowly heat to 95°C and stir well, until the soluti...

Embodiment 2

[0028] A method for preparing a full mold casting coating, the coating consists of the following components in parts by weight: 80 parts of quartz powder, 10 parts of olivine powder, 15 parts of corundum powder, 4 parts of sodium bentonite, 2 parts of lignosulfonic acid, 2 parts of dextrin powder, 1.5 parts of sodium carboxymethyl cellulose, 0.4 parts of sodium benzoate, 2 parts of hollow glass microspheres, 7 parts of aluminum sulfate, 6 parts of polyvinyl alcohol, 5 parts of silica sol, 0.8 parts of iron oxide powder, normal 0.04 part of octanol, 25 parts of water; Described preparation method comprises the steps:

[0029] 1) Mix sodium-based bentonite and dextrin powder with an appropriate amount of water, stir evenly, and let stand for 48 hours to obtain a sodium-based bentonite and dextrin powder-water mixture;

[0030] 2) Mix polyvinyl alcohol with an appropriate amount of water, stir well, then let it stand for 30 minutes, then slowly heat to 95°C and stir well, until t...

Embodiment 3

[0037] A method for preparing a solid casting coating, the coating is composed of the following components in parts by weight: 75 parts of quartz powder, 13 parts of olivine powder, 13 parts of corundum powder, 5 parts of sodium bentonite, 1.5 parts of lignosulfonic acid, 2.5 parts of dextrin powder, 1.2 parts of sodium carboxymethyl cellulose, 0.5 parts of sodium benzoate, 1.5 parts of hollow glass microspheres, 8 parts of aluminum sulfate, 5 parts of polyvinyl alcohol, 5.5 parts of silica sol, 0.6 parts of iron oxide powder, normal 0.05 part of octanol, 20 parts of water; Described preparation method comprises the steps:

[0038]1) Mix sodium-based bentonite and dextrin powder with an appropriate amount of water, stir evenly, and let stand for 42 hours to obtain a sodium-based bentonite and dextrin powder-water mixture;

[0039] 2) Mix polyvinyl alcohol with an appropriate amount of water, stir well, then let it stand for 45 minutes, then slowly heat to 85°C and stir well, u...

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PUM

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Abstract

The invention discloses a method for preparing a full-mold casting coating. The full-mold casting coating prepared by the method is high in anti-burn-on capacity and capable of improving rigidity and high-temperature resistance of molds, while cost is reduced to the utmost extent. A high-current rheological fluid is formed by optimizing blending of aggregates and various additives, and has betterwettability and brushing property to foamed plastic molds. According to practices, the coating thickness of the coating can be at least 1.7mm after the coating is brushed by twice and is capable of meeting requirements for anti-burn-on capacity and transporting of large-size castings. The full-mold casting coating has excellent suspended property, thixotropy, breathabililty and higher surface strength, the method for preparing the full-mold casting coating is simple, convenient in operation and low in cost, and raw materials for preparing the full-mold casting coating are rich. In addition, surfaces of the full-mold castings produced by the full-mold casting coating are smooth and bright and free of defects of wrinkles, carbon black and the like, and coating layers on the surfaces are easy to be stripped and convenient to be cleaned.

Description

technical field [0001] The invention relates to the field of casting, in particular to the field of full mold casting. 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, suspending agents and special additives. It is required that the coating has good process performance, work performance and 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 produ...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 朱小英
Owner 南通市通州区俊朗建筑工程有限公司
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