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High-suspensibility water-based casting coating and preparation method thereof

A casting coating and high-suspension technology, which is applied to casting molding equipment, coatings, casting molds, etc., can solve the problems of difficult re-stirring, hardening, etc., and achieve the effect of overcoming the lack of suspension

Inactive Publication Date: 2017-05-17
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The measurement or comparison of traditional water-based casting coatings is generally measured in a relatively short time, such as 2 hours, or 12 hours, or 24 hours. Compared with the storage period of the coating (usually in months), this time It is far from meeting the requirements. After the above time, the coating will either harden and it will be difficult to re-mix evenly, or the aggregate will sink and become soft, and stratification will occur, and it will need to be re-stirred to make it even again.

Method used

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  • High-suspensibility water-based casting coating and preparation method thereof
  • High-suspensibility water-based casting coating and preparation method thereof
  • High-suspensibility water-based casting coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Prepare 49 kilograms of zircon powder for subsequent use;

[0025] (2) Prepare 0.99 kilograms of sodium bentonite, 50 grams of HPMC, 600 grams of CMC, and 160 grams of PVA for use;

[0026] (3) Prepare 200 grams of defoamer and 49 kilograms of water;

[0027] (4) Pour the powder prepared in step (1) and step (2) into the mixer, fully mix to obtain the mixture, take it out for later use;

[0028] (5) Get 25 kilograms of water prepared in step (3) and pour in the blender;

[0029] (6) Start the blender, slowly add the mixture prepared in step (4) into the blender, after adding, stir for 40 minutes, the mixture is paste;

[0030] (7) Without stopping the machine, slowly add the remaining 24 kg of water into the mixer, then add the defoamer, and continue stirring for 10 minutes to obtain a coating with the required viscosity.

[0031] The paint suspension rate is as follows:

[0032] Table 1

[0033]

Embodiment 2

[0035] (1) Prepare 43 kilograms of zircon powder for subsequent use;

[0036] (2) Prepare 1.57 kilograms of sodium bentonite, 90 grams of HPMC, 750 grams of CMC, and 230 grams of PVA for use;

[0037] (3) Prepare 360 ​​grams of defoamer and 54 kilograms of water;

[0038] (4) Pour the powder prepared in step (1) and step (2) into the mixer, fully mix to obtain the mixture, take it out for later use;

[0039] (5) Get 27 kilograms of water prepared in step (3) and pour in the blender;

[0040] (6) Start the blender, slowly add the mixture prepared in step (4) into the blender, after adding, stir for 60 minutes, the mixture is paste;

[0041] (7) Without stopping the machine, slowly add the remaining 27 kg of water into the mixer, then add the defoamer, and continue stirring for 15 minutes to obtain a coating with the required viscosity.

[0042] The paint suspension rate is as follows:

[0043] Table 2

[0044]

Embodiment 3

[0046] (1) Prepare 39 kilograms of zircon powder for subsequent use;

[0047] (2) Prepare 1.6 kilograms of sodium bentonite, 40 grams of HPMC, 880 grams of CMC, and 160 grams of PVA, for use;

[0048] (3) Prepare 320 grams of defoamer and 58 kilograms of water;

[0049] (4) Pour the powder prepared in step (1) and step (2) into the mixer, fully mix to obtain the mixture, take it out for later use;

[0050] (5) Get 29 kilograms of water prepared in step (3) and pour in the blender;

[0051] (6) Start the blender, slowly add the mixture prepared in step (4) into the blender, and after adding, stir for 30 minutes to form a paste;

[0052] (7) Without stopping the machine, slowly add the remaining 29 kg of water into the mixer, then add the defoamer, and continue stirring for 20 minutes to obtain a coating with the required viscosity.

[0053] The paint suspension rate is as follows:

[0054] table 3

[0055]

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Abstract

The invention discloses a high-suspensiblity water-based casting coating and a preparation method thereof. The high-suspensiblity water-based casting coating comprises, by weight, 39-49% of refractory aggregate, 0.99-1.6% of sodium bentonite, 0.04-0.09% of hydroxypropyl methyl cellulose (HPMC for short), 0.6-0.9% of sodium carboxymethylcellulose (CMC for short), 0.14-0.23% of polyvinyl alcohol (PVA for short), 0.2-0.4% of a defoamer and 49-58% of water. The powder is blended uniformly after being weighed according to the proportion, part of the water is added into an agitation tank, an agitator is started, the powder is added into the agitator gradually and blended for 30-60 minutes into paste, the rest of the water is added slowly, then the defoamer is added into the agitator and blended for 10-20 minutes, and the coating is formed. The suspension percentage of the high-suspensiblity water-based casting coating prepared through the preparation method is still 100% after the coating is stored for a long term, and the defects that a common water-based casting coating is insufficient in suspensibility and cannot be stored for a long time are overcome.

Description

technical field [0001] The invention relates to a sand casting coating, in particular to a high-suspension water-based casting coating and a preparation method thereof. Background technique [0002] The measurement or comparison of traditional water-based casting coatings is generally measured in a relatively short time, such as 2 hours, or 12 hours, or 24 hours. Compared with the storage period of the coating (usually in months), this time It is far from meeting the requirements. After the above-mentioned time, the paint will either harden and it is difficult to re-mix evenly, or the aggregate will sink and become soft, and stratification will occur, and it needs to be re-stirred to make it even again. For such suspensions containing solid particles, the ideal suspension should be such that the coating does not settle or separate during permanent storage. Without re-stirring, taking a part of the paint from any position at any time has the same viscosity, density, solid co...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22F9/04
CPCB22C3/00B22F9/04B22F2009/042B22F2999/00
Inventor 张友寿夏露黄晋晏骏玮李四年
Owner HUBEI UNIV OF TECH
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