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Sand penetration-preventing alcohol-based foundry coating for resin-bonded sand molds and preparation method thereof

A casting coating and anti-penetration technology, which is applied to casting molding equipment, coatings, casting molds, etc., can solve the problems of increasing auxiliary man-hours for cleaning castings, unsatisfactory casting surface quality, and poor anti-sand sticking effect of coatings, etc., achieving high cost performance , Resist molten steel penetration, good suspension effect

Active Publication Date: 2014-02-05
武汉市四友新材料开发有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application shows that the refractoriness of the coating is reduced, and the anti-sand sticking effect of the coating is very poor, resulting in a very unsatisfactory surface quality of the casting, which not only increases the auxiliary man-hours for cleaning the casting, but also increases the labor intensity of the workers, which indirectly increases the cost.

Method used

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  • Sand penetration-preventing alcohol-based foundry coating for resin-bonded sand molds and preparation method thereof
  • Sand penetration-preventing alcohol-based foundry coating for resin-bonded sand molds and preparation method thereof
  • Sand penetration-preventing alcohol-based foundry coating for resin-bonded sand molds and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare 100 kg of paint.

[0028] The first step: crush chrome corundum sand with a particle size of 1-2 mm into 0.35 kg of chrome corundum of 70 mesh, 0.46 kg of chrome corundum of 100 mesh, 1.5 kg of chrome corundum of 140 mesh, 2 kg of chrome corundum of 200 mesh, 2 kg of chrome corundum of 270 mesh, 320 mesh of chrome corundum 0.99kg of mesh chromium corundum 7.3Kg of mixed mesh chromium corundum is mixed with 21.8Kg of 200 mesh chromium corundum, 14.5Kg of 325 mesh chromium corundum, and 29.1Kg of 325 mesh white corundum to obtain refractory powder, which is set aside;

[0029] The second step: take 0.72Kg of sepiolite, add 0.72Kg of ethanol to mix and disperse together, then add 0.36Kg of water, stir well, and the stirring time is 20 minutes to obtain a highly puffed paste, which is ready for use;

[0030] The third step: mix the highly expanded paste obtained above with 3Kg of sodium bentonite, 0.34Kg of polyvinyl butyral, 0.36Kg of phenolic resin, 0.72Kg of 325 ...

Embodiment 2

[0036] Prepare 100 kg of paint.

[0037] Step 1: Crushing chrome corundum sand with a particle size of 1 to 2 mm into 1.05 kg of 70 mesh chrome corundum, 1.5 kg of 100 mesh chrome corundum, 3 kg of 140 mesh chrome corundum, 3.6 kg of 200 mesh chrome corundum, 3.75 kg of 270 mesh chrome corundum, 320 mesh chromium corundum 2.1kg mixed mesh chromium corundum 15Kg, mixed mesh chromium corundum 30Kg, 325 mesh chromium corundum 22.5Kg, 325 mesh white corundum 7.5Kg are mixed to obtain refractory powder, set aside;

[0038] The second step: take 1.2Kg of sepiolite, add 1.2Kg of ethanol to mix and disperse together, then add 0.5Kg of water, stir thoroughly, and the stirring time is 20 minutes to obtain a highly puffed paste, which is ready for use;

[0039] Step 3: Mix the highly expanded paste obtained above with 2.7Kg of sodium bentonite, 0.3Kg of polyvinyl butyral, 0.5Kg of phenolic resin, 1.1Kg of 325 mesh limestone powder, and 3.5Kg of ethanol, and stir evenly at high speed Abo...

Embodiment 3

[0045] Prepare 100 kg of paint.

[0046]Step 1: Crushing chrome corundum sand with a particle size of 1 to 2 mm into 2.1 kg of 70 mesh chrome corundum, 2.1 kg of 100 mesh chrome corundum, 5 kg of 140 mesh chrome corundum, 5.7 kg of 200 mesh chrome corundum, 6.4 kg of 270 mesh chrome corundum, 320 mesh chromium corundum 2.5kg mixed mesh chromium corundum 23.8Kg, mixed mesh chromium corundum 38.9Kg, 325 mesh chromium corundum 7.7Kg, 325 mesh white corundum 7.7Kg mixed to obtain refractory powder, set aside;

[0047] Step 2: Take 1.5Kg of sepiolite, add 1.5Kg of ethanol to mix and disperse together, then add 0.75Kg of water, stir thoroughly, and the stirring time is 20 minutes to obtain a highly puffed paste, which is ready for use;

[0048] The third step: mix the highly expanded paste obtained above with 1.5Kg of sodium bentonite, 0.4Kg of polyvinyl butyral, 0.75Kg of phenolic resin, 1.5Kg of 325 mesh limestone powder, and 5Kg of ethanol, and stir at a high speed for about Get...

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Abstract

The invention discloses a sand penetration-preventing alcohol-based foundry coating for resin-bonded sand molds and a preparation method thereof. The sand penetration-preventing alcohol-based foundry coating is composed of the following components: 7.3-48.8% of mixed-meshes chrome corundum, 8.1-38.9% of 200-mesh chrome corundum, 7.7-22.5% of 325-mesh chrome corundum, 7.5-29.1% of 325-mesh white corundum, 0.72-1.5% of sepiolite, 1.5-3% of sodium-based bentonite, 0.3-0.5% of polyvinyl butyral, 0.36-0.97% of phenolic resin, 0.72-1.62% of 325-mesh limestone flour, 0.36-0.75% of water and 12.1-21.8% of ethanol. The foundry coating provided by the invention contains no zircon power and has obvious price advantage in contrast with the zircon power; the foundry coating is wide in raw material resource and high in cost performance. The coating provided by the invention is very good in suspension property, high in coating compactness, excellent in breathability and strong in steel liquid penetration resistance.

Description

technical field [0001] The invention relates to an alcohol-based casting paint for a resin sand mold, in particular to an anti-penetration sticky sand alcohol-based casting paint for a resin sand mold and a preparation method thereof. Background technique [0002] In recent years, resin sand casting can improve the surface quality of castings, making it more and more widely used. In resin sand casting, the most widely used and most effective casting coating is zircon powder coating. However, during casting, especially the casting of high-alloy steel, stainless steel or large steel castings, it is easy to produce sand sticking or severe penetration sand sticking. Moreover, zircon powder has very few resources in our country, mainly relying on imports, and the price is very expensive. [0003] At present, in order to reduce the cost of coatings, all or part of the replacement materials are added to zircon powder coatings. However, the application shows that the refractorine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 张友寿黄晋夏露李四年陈爱平
Owner 武汉市四友新材料开发有限责任公司
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