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

A technology of solid casting and coating, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of inapplicability to manual brushing, poor high temperature resistance, and inability to adapt to production, etc., and achieve good suspension and touch Denaturation, high anti-sand sticking ability, low production cost

Active Publication Date: 2013-05-15
XIANGFAN JINNAITE MACHINERY
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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 for cast iron, which consists of the following components in parts by weight (kg): 75 parts of quartz powder, 7 parts of tree ash, 12 parts of corundum powder, 12 parts of sodium bentonite, and nano-attapulgite 4 parts, 1 part of lignosulfonic acid, 4 parts of water glass, 4 parts of sodium borate, 7 parts of starch paste, 1.4 parts of silica sol, 1 part of nano-scale ceramic powder, 0.8 parts of iron oxide red powder, 2 parts of fluorite powder, leech 3 parts of stone powder, 1 part of coal gangue powder; 64 parts of water, the preparation method comprises the following 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 8% of its weight, 9% sodium hydroxide powder, and an appropriate ...

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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 iron. 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 wood ash, 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 water glass, 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 cast iron. 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 , th...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 夏坤财
Owner XIANGFAN JINNAITE MACHINERY
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