Method for preparing solid-mold casting coating material for cast aluminum

A technology of solid casting and coating, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc. It can solve the problems of inability to apply manual brushing, unadaptable production, poor high temperature resistance, etc., and achieve good suspension and touch. The effects of denaturation, low production cost, and high sand-sticking resistance

Active Publication Date: 2013-05-15
深圳市倍耐德材料科技有限公司
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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...

Method used

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Embodiment Construction

[0014] A method for preparing a solid casting coating for aluminum casting, which consists of the following components in parts by weight (kg): 75 parts of quartz powder, 7 parts of plant ash, 5 parts of slag, 12 parts of corundum powder, 12 parts of sodium bentonite, 4 parts of nano-attapulgite, 2 parts of lignosulfonic acid, 4 parts of polyvinyl alcohol, 0.7 parts of n-octanol, 2 parts of sodium borate, 5 parts of starch paste, 1.6 parts of silica sol, 2 parts of nano-scale ceramic powder, oxidized 0.8 parts of iron red powder, 2 parts of charcoal, 4 parts of barite powder, 65 parts of water, the preparation method comprises the following steps:

[0015] 1) Soak plant ash with 12-15% sulfuric acid for 3-4 hours, wash it with deionized water, then soak it with 10-12% sodium hydroxide solution for 2-3 hours, then wash it with deionized water until neutral, and then wash it at 460 After calcining at -500°C for 2-3 hours, add starch paste equivalent to 8% of its weight, 7% sodiu...

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PUM

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Abstract

The invention discloses a method for preparing a solid-mold casting coating material for cast aluminum. According to the method, the solid-mold casting coating material is prepared from the following ingredients in parts by weight: 65-75 parts of quartz powder, 5-7 parts of plant ash, 5-7 parts of slag, 10-12 parts of corundum powder, 10-12 parts of sodium bentonite, 4-6 parts of nano attapulgite, 1-2 parts of lignosulfonic acid, 2-4 parts of polyvinyl alcohol, 0.3-0.7 part of n-octanol, 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 and 525-535 parts of water. The solid-mold casting coating material prepared by the method has excellent gas permeability and quick-drying performance in both high-temperature environments and low-temperature environments, thereby being capable of 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 coating for aluminum 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, 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 tim...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 夏坤财
Owner 深圳市倍耐德材料科技有限公司
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