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A technology for refractory coatings and molds, applied in coatings, casting molding equipment, casting molds, etc., to achieve good wettability and adhesion, good coating and hanging properties, and easy drying
Inactive Publication Date: 2016-02-17
广西博白县三田机械制造有限公司
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However, under the action of negative pressure, liquid metal can easily penetrate into the gap between dry sand and form mechanical sticky sand.
Method used
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Embodiment 1
[0029] A refractory coating for mold casting, which is composed of the following raw materials: bauxite 4kg, quartz powder 3kg, corundum 1kg, diatomite 1kg, talcum powder 1kg, cryolite 0.1kg, CMC 0.8kg, polyethylene Alcohol 0.3kg, water glass 0.3kg, sodium phosphate 0.1kg.
[0030] The preparation method is that water is used as a carrier, and all raw materials are mixed evenly in proportion.
Embodiment 2
[0032] A refractory coating for mold casting, which is composed of the following raw materials: bauxite 6kg, quartz powder 1kg, corundum 0.5kg, diatomite 0.5kg, talcum powder 0.5kg, cryolite 0.3kg, CMC 0.3kg , polyvinyl alcohol 0.1kg, water glass 0.8kg, sodium phosphate 0.3kg.
[0033] The preparation method is that water is used as a carrier, and all raw materials are mixed evenly in proportion.
Embodiment 3
[0035] A refractory coating for mold casting is composed of the following raw materials: 4.5kg of bauxite, 2.5kg of quartz powder, 0.8kg of corundum, 0.6kg of diatomaceous earth, 0.8kg of talcum powder, 0.1kg of cryolite, CMC0 .4kg, polyvinyl alcohol 0.1kg, water glass 0.6kg, sodium phosphate 0.1kg, fatty alcohol polyoxyethylene ether 0.02kg.
[0036] The preparation method is that water is used as a carrier, and all raw materials are mixed evenly in proportion.
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Abstract
The invention relates to a fire-proof coating used for die casting. The fire-proof coating is prepared from bauxite, quartz powder, corundum powder, kieselguhr, talcum powder, cryolite, CMC, polyvinyl alcohol, water glass and sodium phosphate. The fire-proof coating is suitable for evaporative pattern casting, is high in breathability, and has the beneficial effects of having good wettability and adhesivity and being resistant to high temperature, good in coating performance, easy to dry, and the like.
Description
technical field [0001] The invention relates to the field of casting, in particular to a refractory coating for mold casting. Background technique [0002] Mold casting is a part of casting tooling, and it is the necessary equipment to shape the casting and obtain the required casting. Lost foam casting, also known as solid casting, is to bond and combine paraffin or foam models similar in size and shape to castings to form a model cluster. After brushing with refractory paint and drying, it is buried in dry sand for vibration modeling, and poured under negative pressure. , the model is vaporized, the liquid metal occupies the position of the model, solidified and cooled to form a new casting method of castings. [0003] Because after foam molding, the surrounding area is covered with molding sand. On the one hand, since the molding sand is approximately spherical, there is actually point contact between the molding sand and the surface of the model, and there are many tin...
Claims
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Application Information
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