Method for preparing solid-mold casting coating material for large-sized cast parts

It is a technology of full mold casting and large castings, which is applied to casting molding equipment, coatings, cores, etc. It 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 sand-sticking resistance

Inactive Publication Date: 2013-05-15
辽宁佳和精密金属有限公司
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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 sm

Method used

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Embodiment Construction

[0014] A method for preparing a full mold casting coating for large castings, which consists of the following components in parts by weight (kg): 68 parts of quartz powder, 5 parts of tree ash, 7 parts of fly ash, 12 parts of water glass, and sodium bentonite 10 parts, 4 parts of nano-calcium carbonate, 2 parts of lignosulfonic acid, 4 parts of carboxymethyl cellulose, 0.3 parts of glycerin, 2 parts of sodium borate, 7 parts of starch paste, 1.6 parts of silica sol, 1 part of nano-scale ceramic powder , 0.5 part of iron oxide red powder, 2 parts of sodium tripolyphosphate, 5 parts of potassium feldspar powder, 65 parts of water, described preparation method comprises the steps:

[0015] 1) Soak tree ash with 12-15% sulfuric acid for 3-4 hours, wash with deionized water, then soak with 10-12% sodium hydroxide solution for 2-3 hours, then wash with deionized water until neutral, and then After calcining at 460-500°C for 2-3 hours, add starch paste equivalent to 5% of its weight,...

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PUM

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Abstract

The invention discloses a method for preparing a solid-mold casting coating material for large-sized cast parts. According to the method, the solid-mold casting coating material is prepared from the following ingredients in parts by weight: 68-75 parts of quartz powder, 5-7 parts of wood ash, 5-7 parts of fly ash, 10-12 parts of water glass, 10-12 parts of sodium bentonite, 4-6 parts of nano calcium carbonate, 1-2 parts of lignosulfonic acid, 2-4 parts of carboxymethyl cellulose, 0.3-0.7 part of glycerine, 2-4 parts of sodium borate, 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, 1-2 parts of sodium tripolyphosphate, 4-5 parts of potassium feldspar powder and 525-635 parts of water. The solid-mold casting coating material prepared by the method has excellent gas permeability and quick-drying performance in both a high-temperature environment and a low-temperature environment, thereby meeting the production requirements of the large-sized cast parts.

Description

technical field [0001] The invention relates to the field of casting, in particular to a method for preparing a full mold casting paint for large castings. 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-calcium carbonate and special additives. The coating needs to have good process performance, work performance, Quality consistency 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 ...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 夏坤财
Owner 辽宁佳和精密金属有限公司
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