CN104226893A - Lost foam casting coating and preparation method thereof - Google Patents

Lost foam casting coating and preparation method thereof Download PDF

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Publication number
CN104226893A
CN104226893A CN201410430807.9A CN201410430807A CN104226893A CN 104226893 A CN104226893 A CN 104226893A CN 201410430807 A CN201410430807 A CN 201410430807A CN 104226893 A CN104226893 A CN 104226893A
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Prior art keywords
lost foam
solution
foam casting
rosin
coating
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CN201410430807.9A
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CN104226893B (en
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浦巧生
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Wujiang Hydraulic Components Foundry Co Ltd
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Wujiang Hydraulic Components Foundry Co Ltd
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Abstract

The invention discloses a lost foam casting coating and a preparation method thereof. The coating is prepared by mica powder, quartz powder, silicon sol, water, vegetable oil, alums, calcium carbonate, normal butanol, rosin and alkyl benzene sulfonic acid; the mica powder, the quartz powder and the calcium carbonate are respectively filtered by a 300-mesh screen. The preparation method of the coating comprises the following steps: placing the rosin in the normal butanol, slowly heating the mixture of the rosin and normal butanol to 40 to 50 DEG C, adding the calcium carbonate after the rosin is completely dissolved, adequately stirring the calcium carbonate to obtain a solution A, adequately mixing the mica powder, the quartz powder and the silicon solution to obtain a suspension liquid B, dissolving the alkyl benzene sulfonic acid in the water to obtain a solution C, adequately mixing the solution A and the suspension liquid B, adding the solution C, finally adding the alums, and mixing the alums and the solution to obtain the lost foam casting coating. The lost foam coasting coating is wide in source of raw materials, low in production cost and simple in preparation method, and a prepared casting is smooth in surface and free from being bonded with sand.

Description

A kind of lost foam casting coating and preparation method thereof
Technical field
The present invention relates to a kind of lost foam casting coating, belong to casting technology field.
Background technology
Different from common sand cast paint, coating for dispellable mould casting is not be coated on casting mold die cavity, but is coated on foamed polystyrene pattern.When foamed polystyrene pattern is replaced by liquid metal, what in fact coating played is casting mold effect, thus has saying of " namely coating being casting mold ".During cast, a large amount of gases that foamed plastics thermal decomposition produces can will be discharged outside casting mold by space between fireproof coating and dry sand.
When carrying out evaporative pattern castings production, foam can produce a large amount of gas.If the gas permeability of coating is bad, the foundry goods produced will be made to produce a large amount of pores, foundry goods is scrapped.If the refractoriness do not had, foundry goods will be made to produce scab, thus cause metalworking difficulty even to scrap.If the cold strength do not had, the coating on evaporative pattern will be made cracking to occur or peel off, thus generation scab or coating interlayer make foundry goods scrap.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide that a kind of intensity is high, the lost foam casting coating of good permeability and preparation method thereof.
The present invention is achieved through the following technical solutions:
A kind of lost foam casting coating, is made up of the raw material of following parts by weight: mica powder 80-100 part, silica flour 80-100 part, Ludox 4-8 part, water 15-18 part, vegetable oil 10-15 part, alum 18-22 part, calcium carbonate 3-9 part, n-butanol 10-15 part, rosin 2-3 part and alkyl benzene sulphonate 1-3 part; Described mica powder, silica flour and calcium carbonate all cross 300 mesh sieves.
Described a kind of lost foam casting coating, the weight ratio of described mica powder and silica flour is 1:1.
Described a kind of lost foam casting coating, in described silica flour, the content of silica is greater than 98%.
Described a kind of lost foam casting coating, the weight ratio of described rosin and n-butanol is 1:5.
Described a kind of lost foam casting coating, described Ludox is alkaline silica sol, and its 20 DEG C of viscosity are 4.5-5.0*10 -3pas.
The preparation method of described a kind of lost foam casting coating, rosin is placed in n-butanol, slowly be heated to 40-50 DEG C, after rosin dissolves completely, add after calcium carbonate fully stirs and obtain solution A, after mica powder and silica flour fully being mixed with Ludox, obtain suspension B, solution C is obtained by soluble in water for alkyl benzene sulphonate, after solution A and suspension B fully being mixed, add solution C, finally add alum and carry out being mixed to get lost foam casting coating.
The beneficial effect that the present invention reaches:
Lost foam casting coating raw material sources of the present invention are extensive, production cost is low, preparation method is simple, and adopt resistant to elevated temperatures Ludox as binding agent, bond effect is good, add mica powder and alum, improve coating intensity under the high temperature conditions, feed particles is careful, and coating is easily peeled off, thus make the cast(ing) surface that obtains smooth, not scab.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Embodiment 1
In the present embodiment, a kind of lost foam casting coating, is made up of the raw material of following parts by weight: mica powder 80 parts, silica flour 80 parts, Ludox 4 parts, 18 parts, water, vegetable oil 15 parts, 18 parts, alum, 9 parts, calcium carbonate, n-butanol 10 parts, rosin 2 parts and alkyl benzene sulphonate 3 parts; Described mica powder, silica flour and calcium carbonate all cross 300 mesh sieves.
Wherein, in described silica flour, the content of silica is greater than 98%, and described Ludox is alkaline silica sol, and its 20 DEG C of viscosity are 5.0*10 -3pas.
The preparation method of described a kind of lost foam casting coating, rosin is placed in n-butanol, slowly be heated to 50 DEG C, after rosin dissolves completely, add after calcium carbonate fully stirs and obtain solution A, after mica powder and silica flour fully being mixed with Ludox, obtain suspension B, solution C is obtained by soluble in water for alkyl benzene sulphonate, after solution A and suspension B fully being mixed, add solution C, finally add alum and carry out being mixed to get lost foam casting coating.
Embodiment 2
In the present embodiment, a kind of lost foam casting coating, is made up of the raw material of following parts by weight: mica powder 100 parts, silica flour 100 parts, Ludox 8 parts, 15 parts, water, vegetable oil 10 parts, 22 parts, alum, 3 parts, calcium carbonate, n-butanol 15 parts, rosin 3 parts and alkyl benzene sulphonate 1 part; Described mica powder, silica flour and calcium carbonate all cross 300 mesh sieves.
Wherein, in described silica flour, the content of silica is greater than 98%, and described Ludox is alkaline silica sol, and its 20 DEG C of viscosity are 4.5*10 -3pas.
The preparation method of described a kind of lost foam casting coating, rosin is placed in n-butanol, slowly be heated to 40 DEG C, after rosin dissolves completely, add after calcium carbonate fully stirs and obtain solution A, after mica powder and silica flour fully being mixed with Ludox, obtain suspension B, solution C is obtained by soluble in water for alkyl benzene sulphonate, after solution A and suspension B fully being mixed, add solution C, finally add alum and carry out being mixed to get lost foam casting coating.
Embodiment 3
In the present embodiment, a kind of lost foam casting coating, is made up of the raw material of following parts by weight: mica powder 95 parts, silica flour 95 parts, Ludox 6 parts, 16 parts, water, vegetable oil 13 parts, 20 parts, alum, 7 parts, calcium carbonate, n-butanol 10 parts, rosin 2 parts and alkyl benzene sulphonate 3 parts; Described mica powder, silica flour and calcium carbonate all cross 300 mesh sieves.
Wherein, in described silica flour, the content of silica is greater than 98%, and described Ludox is alkaline silica sol, and its 20 DEG C of viscosity are 5.0*10 -3pas.
The preparation method of described a kind of lost foam casting coating, rosin is placed in n-butanol, slowly be heated to 45 DEG C, after rosin dissolves completely, add after calcium carbonate fully stirs and obtain solution A, after mica powder and silica flour fully being mixed with Ludox, obtain suspension B, solution C is obtained by soluble in water for alkyl benzene sulphonate, after solution A and suspension B fully being mixed, add solution C, finally add alum and carry out being mixed to get lost foam casting coating.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.

Claims (6)

1. a lost foam casting coating, it is characterized in that, be made up of the raw material of following parts by weight: mica powder 80-100 part, silica flour 80-100 part, Ludox 4-8 part, water 15-18 part, vegetable oil 10-15 part, alum 18-22 part, calcium carbonate 3-9 part, n-butanol 10-15 part, rosin 2-3 part and alkyl benzene sulphonate 1-3 part; Described mica powder, silica flour and calcium carbonate all cross 300 mesh sieves.
2. a kind of lost foam casting coating according to claim 1, is characterized in that, the weight ratio of described mica powder and silica flour is 1:1.
3. a kind of lost foam casting coating according to claim 1, is characterized in that, in described silica flour, the content of silica is greater than 98%.
4. a kind of lost foam casting coating according to claim 1, is characterized in that, the weight ratio of described rosin and n-butanol is 1:5.
5. a kind of lost foam casting coating according to claim 1, is characterized in that, described Ludox is alkaline silica sol, and its 20 DEG C of viscosity are 4.5-5.0*10 -3pas.
6. the preparation method of a kind of lost foam casting coating according to claim 1, it is characterized in that, rosin is placed in n-butanol, is slowly heated to 40-50 DEG C, after rosin dissolves completely, add after calcium carbonate fully stirs and obtain solution A, obtain suspension B after mica powder and silica flour fully being mixed with Ludox, obtain solution C by soluble in water for alkyl benzene sulphonate, after solution A and suspension B are fully mixed, add solution C, finally add alum and carry out being mixed to get lost foam casting coating.
CN201410430807.9A 2014-08-29 2014-08-29 A kind of lost foam casting coating and preparation method thereof Active CN104226893B (en)

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CN104226893B CN104226893B (en) 2016-03-23

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105363992A (en) * 2015-10-21 2016-03-02 和县科嘉阀门铸造有限公司 Valve lost foam casting coating
CN105817570A (en) * 2016-05-27 2016-08-03 马鞍山市兴隆铸造有限公司 Modified quartz-based mica powder full mold paint easy to smear and preparation method thereof
CN105834354A (en) * 2016-05-27 2016-08-10 马鞍山市兴隆铸造有限公司 High-hardness anti-cracking mica powder modified silica matrix EPC coating and preparation method thereof
CN107497992A (en) * 2017-10-16 2017-12-22 湖南长高新材料股份有限公司 Lost foam casting coating and preparation method thereof and application method
CN108941443A (en) * 2017-05-22 2018-12-07 湖北润阳新能源有限公司 A kind of cast panel release agent and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101497105A (en) * 2009-03-12 2009-08-05 深圳市景鼎现代科技有限公司 Cast form water borne coating and technique for preparing the same
CN102179473A (en) * 2011-05-11 2011-09-14 李华山 Lost foam casting composite coating
CN102248120A (en) * 2011-04-11 2011-11-23 中方阀业淅川制造有限公司 Low thermoconductive paint for casting lost foam of thin wall cast
JP2014073504A (en) * 2012-10-02 2014-04-24 Okazaki Huttenes-Albertus Chemicals Co Ltd Mold wash for casting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101497105A (en) * 2009-03-12 2009-08-05 深圳市景鼎现代科技有限公司 Cast form water borne coating and technique for preparing the same
CN102248120A (en) * 2011-04-11 2011-11-23 中方阀业淅川制造有限公司 Low thermoconductive paint for casting lost foam of thin wall cast
CN102179473A (en) * 2011-05-11 2011-09-14 李华山 Lost foam casting composite coating
JP2014073504A (en) * 2012-10-02 2014-04-24 Okazaki Huttenes-Albertus Chemicals Co Ltd Mold wash for casting

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105363992A (en) * 2015-10-21 2016-03-02 和县科嘉阀门铸造有限公司 Valve lost foam casting coating
CN105817570A (en) * 2016-05-27 2016-08-03 马鞍山市兴隆铸造有限公司 Modified quartz-based mica powder full mold paint easy to smear and preparation method thereof
CN105834354A (en) * 2016-05-27 2016-08-10 马鞍山市兴隆铸造有限公司 High-hardness anti-cracking mica powder modified silica matrix EPC coating and preparation method thereof
CN108941443A (en) * 2017-05-22 2018-12-07 湖北润阳新能源有限公司 A kind of cast panel release agent and preparation method thereof
CN107497992A (en) * 2017-10-16 2017-12-22 湖南长高新材料股份有限公司 Lost foam casting coating and preparation method thereof and application method

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