CN102847871A - Lost foam paint and preparation method thereof - Google Patents
Lost foam paint and preparation method thereof Download PDFInfo
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- CN102847871A CN102847871A CN2012103194828A CN201210319482A CN102847871A CN 102847871 A CN102847871 A CN 102847871A CN 2012103194828 A CN2012103194828 A CN 2012103194828A CN 201210319482 A CN201210319482 A CN 201210319482A CN 102847871 A CN102847871 A CN 102847871A
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Abstract
The invention relates to a lost foam paint and a preparation method thereof. The paint comprises, by weight, 45 to 55 parts of bauxite chamotte, 25 to 35 parts of quartz powder, 1 to 3 parts of sodium-based bentonite, 0.5 to 1.5 parts of CMC, 1 to 2.5 parts of polyvinyl alcohol, 1 to 3 parts of silica sol, 0.5 to 1.5 parts of soluble glass, 4 to 6 parts of BR resin, 0.1 to 0.3 part of T-80 and 1 to 3 parts of iron oxide red powder. The lost foam paint provided by the invention has good high temperature permeability, excellent brushability, good permeability, strong adhesion and no wrinkled skin on a casting surface; and after a template is dried, the template has high strength, can satisfy transport requirements for heavy castings and has strong capacity in resisting sticky sand.
Description
Technical field
The invention belongs to casting field, particularly lost foam cast steel manufacturing technology field.
Background technology
Lost foam casting (claiming again cavityless casting) is that the bubbles model bonding similar to the casting dimension shape is combined into model cluster, after brushing fireproof coating and oven dry, be embedded in vibration molding in the dried quartz sand, under negative pressure, pour into a mould, make the model gasification, liquid metals occupies modal position, solidifies the rear novel casting method that forms foundry goods of cooling.
Compare with the conventional cast technology, lost foam casting has following characteristics: 1, and casting quality is good, and cost is low; 2, material is not limit, and size is all suitable; 3, dimensional accuracy is high, and any surface finish reduces the cleaning work amount; 4, internal flaw greatly reduces, dense structure; 5 can realize extensive, production in enormous quantities, can greatly improve operating environment, reduce labour intensity, reduce energy resource consumption.
The coating that existing heavy castings are selected usually is alcohol-base paint, take methyl alcohol as solvent, although casting quality is better, yet because existing paint adhesion relatively poor, the problem that manufacturing cost is higher.
The evaporative pattern casting process difficulty of heavy castings is larger, except considering evaporative pattern apperance intensity, be beneficial to outside the construction, for a large amount of foamed material gasifications and pyrolysis product, also good gas permeability to be arranged, yet the intensity that increases coating must add thick coating, like this gas permeability of coating has been proposed very high request.
Summary of the invention
The objective of the invention is to propose a kind of deficiency that can overcome existing lost foam paint, have lost foam paint of superperformance and preparation method thereof.
Technical scheme of the present invention is as follows:
The invention provides a kind of lost foam paint, comprise following component: bauxite chamotte 45 ~ 55 weight portions, silica flour 25 ~ 35 weight portions, sodium bentonite 1 ~ 3 weight portion, CMC 0.5 ~ 1.5 weight portion, polyvinyl alcohol 1 ~ 2.5 weight portion, Ludox 1 ~ 3 weight portion, waterglass 0.5 ~ 1.5 weight portion, BR resin 4 ~ 6 weight portions, T-80 0.1 ~ 0.3 weight portion, ferric oxide red powder 1 ~ 3 weight portion.
In one embodiment of the invention, the proportioning of each component of described lost foam paint is as follows: bauxite chamotte 45 weight portions, silica flour 25 weight portions, sodium bentonite 3 weight portions, CMC 1.5 weight portions, polyvinyl alcohol 2 weight portions, Ludox 1 weight portion, waterglass 1.5 weight portions, BR resin 4 weight portions, T-80 0.2 weight portion, ferric oxide red powder 2 weight portions.
In another embodiment of the present invention, the proportioning of each component of described lost foam paint is as follows: bauxite chamotte 50 weight portions, silica flour 30 weight portions, sodium bentonite 2 weight portions, CMC 1 weight portion, polyvinyl alcohol 1 weight portion, Ludox 2 weight portions, waterglass 1 weight portion, BR resin 5 weight portions, T-80 0.1 weight portion, ferric oxide red powder 1 weight portion.
In another embodiment of the present invention, the proportioning of each component of described lost foam paint is as follows: bauxite chamotte 55 weight portions, silica flour 35 weight portions, sodium bentonite 1 weight portion, CMC 0.5 weight portion, polyvinyl alcohol 2.5 weight portions, Ludox 3 weight portions, waterglass 0.5 weight portion, BR resin 6 weight portions, T-80 0.3 weight portion, ferric oxide red powder 3 weight portions.
Wherein, the CMC among the present invention refers to carboxymethyl cellulose.
The present invention also provides a kind of preparation method of lost foam paint, comprises following steps: A. adds water with sodium bentonite, stirs into bentonite slurry; B. bauxite chamotte, silica flour are stirred in milling apparatus, then add entry, so that powder is moistening and stir, as aggregate; C. after CMC, polyvinyl alcohol, Ludox, waterglass, BR resin, T-80, ferric oxide red powder being mixed, add entry, be mixed with the aqueous solution; D. in the described aqueous solution that the described aggregate adding step C that the described bentonite slurry that steps A is made and step B make makes, stir fully and mix, make described lost foam paint.
Further, the agitating mode of described steps A was specially: with the rotating speed high-speed stirred more than the 1000rpm 6 hours.
Further, the agitating mode of described step D is specially: after 1 hour, kept the following rotating speed stirring at low speed of 600rpm 10 hours with the rotating speed high-speed stirred more than the 1000rpm.
Lost foam paint good permeability for the die cast heavy castings provided by the invention, strong adhesion, strength of coating is high.Use cost is lower when satisfying heavy castings production.
The specific embodiment
Below by embodiment, technical scheme of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.
Embodiment 1
The ratio of each component is of lost foam paint: 250 purpose bauxite chamottes of 45 weight portions, 280 purpose silica flours of 25 weight portions, 3 weight portion sodium bentonites, 1.5 weight portion CMC, 2 weight account polyethylenes alcohol, 1 weight portion Ludox, 1.5 weight parts water glass, 4 weight portion BR resins, 0.2 weight portion T-80,2 weight portion ferric oxide red powder.
Prepare lost foam paint according to following steps:
At first 3 weight portion sodium bentonites are mixed with 8 weight parts waters, became bentonite slurry in 5 hours with the rotating speed high-speed stirred more than the 1000rpm; Simultaneously, get 250 purpose bauxite chamottes of 45 weight portions, 280 purpose silica flours of 25 weight portions stir, and add therein the water of 60 weight portions in milling apparatus, stir and make it form aggregate.Then get 1.5 weight portion CMC, 2 weight account polyethylenes alcohol, 1 weight portion Ludox, 1.5 weight parts water glass, 4 weight portion BR resins, 0.2 weight portion T-80,2 weight portion ferric oxide red powder, make its mixing, in mixture, add 10 weight parts waters, be mixed with the aqueous solution;
At last bentonite slurry, aggregate are added the above-mentioned aqueous solution, stir, the mixed coating, agitating mode made: first with the high-speed stirred more than the 1000rpm 1 hour again stirring at low speed discharge the gas that is involved in the coating, keep the stirring at low speed 10 hours of 600rpm.
After tested, each performance indications of the lost foam paint for preparing of said method are as shown in table 1.
Embodiment 2
The ratio of each component is of lost foam paint: 300 purpose bauxite chamottes of 50 weight portions, 300 purpose silica flours of 30 weight portions, 2 weight portion sodium bentonites, 1 weight portion CMC, 1 weight account polyethylene alcohol, 2 weight portion Ludox, 1 weight parts water glass, 5 weight portion BR resins, 0.1 weight portion T-80,1 weight portion ferric oxide red powder.
Prepare lost foam paint according to following steps:
At first 2 weight portion sodium bentonites are mixed with 10 weight parts waters, became bentonite slurry in 6 hours with the rotating speed high-speed stirred more than the 1000rpm; Simultaneously, get 300 purpose bauxite chamottes of 50 weight portions, 300 purpose silica flours of 30 weight portions stir, and add therein the water of 60 weight portions in milling apparatus, stir and make it form aggregate.Then get 1 weight portion CMC, 1 weight account polyethylene alcohol, 2 weight portion Ludox, 1 weight parts water glass, 5 weight portion BR resins, 0.1 weight portion T-80,1 weight portion ferric oxide red powder, make its mixing, in mixture, add 10 weight parts waters, be mixed with the aqueous solution;
At last bentonite slurry, aggregate are added the above-mentioned aqueous solution, stir, the mixed coating, agitating mode made: first with the high-speed stirred more than the 1000rpm 1 hour again stirring at low speed discharge the gas that is involved in the coating, keep the stirring at low speed 9 hours of 600rpm.
After tested, each performance indications of the lost foam paint for preparing of said method are as shown in table 1.
Embodiment 3
The ratio of each component is of lost foam paint: 280 purpose bauxite chamottes of 55 weight portions, 280 purpose silica flours of 35 weight portions, 1 weight portion sodium bentonite, 0.5 weight portion CMC, 2.5 weight account polyethylenes alcohol, 3 weight portion Ludox, 0.5 weight parts water glass, 6 weight portion BR resins, 0.3 weight portion T-80,3 weight portion ferric oxide red powder.
Prepare lost foam paint according to following steps:
At first 1 weight portion sodium bentonite is mixed with 10 weight parts waters, became bentonite slurry in 7 hours with the rotating speed high-speed stirred more than the 1000rpm; Simultaneously, get 280 purpose bauxite chamottes of 55 weight portions, 280 purpose silica flours of 35 weight portions stir, and add therein the water of 55 weight portions in milling apparatus, stir and make it form aggregate.Then get 0.5 weight portion CMC, 2.5 weight account polyethylenes alcohol, 3 weight portion Ludox, 0.5 weight parts water glass, 6 weight portion BR resins, 0.3 weight portion T-80,3 weight portion ferric oxide red powder, make its mixing, in mixture, add 10 weight parts waters, be mixed with the aqueous solution;
At last bentonite slurry, aggregate are added the above-mentioned aqueous solution, stir, the mixed coating, agitating mode made: first with the high-speed stirred more than the 1000rpm 1 hour again stirring at low speed discharge the gas that is involved in the coating, keep the stirring at low speed 10 hours of 500rpm.
After tested, each performance indications of the lost foam paint for preparing of said method are as shown in table 1.
Table 1
Embodiment 4Foundry goods
Use embodiment 1 ~ 3 prepared lost foam paint to carry out foundry goods according to following technique.
Extension is coated with: the evaporative pattern apperance at first immerses coating, the dry processing after taking out.Can hang according to the foundry goods situation and to be coated with the repetition said process 2 ~ 5 times.Gas forming amount when pouring into a mould for reducing guarantees casting quality, must dry after foam plastics mould is coated with and coats, guarantee to make enough drying times coating oven dry, baking thoroughly, temperature is controlled at 40 ~ 60 degree, 2 ~ 8 hours time, use in case of necessity microwave drying dry, to accelerate dry run.
Casting: then model is placed to fill out in the sandbox and do sand, shake consolidation, and covered with plastic film is to vacuumizing in the sandbox on sandbox, after the casting, evaporative pattern gasifies, and molten metal is filled into, takes out foundry goods after cooling.
Effect: satisfying under due normal temperature and the elevated temperature strength, lost foam paint has preferably hot permeability, good brushing performance. and good permeability, adhesive force are very strong, and the brushing performance is good, and cast(ing) surface is without elephant skin.And after the apperance drying, Foam Pattern intensity is high, satisfies the carrying requirement of heavy castings, and anti-stick husky ability is strong.
Although the present invention discloses as above with preferred embodiment; so it is not to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the present invention; when can doing a little change and improvement, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (7)
1. lost foam paint, it is characterized in that, comprise following component: bauxite chamotte 45 ~ 55 weight portions, silica flour 25 ~ 35 weight portions, sodium bentonite 1 ~ 3 weight portion, CMC 0.5 ~ 1.5 weight portion, polyvinyl alcohol 1 ~ 2.5 weight portion, Ludox 1 ~ 3 weight portion, waterglass 0.5 ~ 1.5 weight portion, BR resin 4 ~ 6 weight portions, T-80 0.1 ~ 0.3 weight portion, ferric oxide red powder 1 ~ 3 weight portion.
2. lost foam paint according to claim 1, it is characterized in that, the proportioning of described each component is as follows: bauxite chamotte 45 weight portions, silica flour 25 weight portions, sodium bentonite 3 weight portions, CMC 1.5 weight portions, polyvinyl alcohol 2 weight portions, Ludox 1 weight portion, waterglass 1.5 weight portions, BR resin 4 weight portions, T-80 0.2 weight portion, ferric oxide red powder 2 weight portions.
3. lost foam paint according to claim 1, it is characterized in that, the proportioning of described each component is as follows: bauxite chamotte 50 weight portions, silica flour 30 weight portions, sodium bentonite 2 weight portions, CMC 1 weight portion, polyvinyl alcohol 1 weight portion, Ludox 2 weight portions, waterglass 1 weight portion, BR resin 5 weight portions, T-80 0.1 weight portion, ferric oxide red powder 1 weight portion.
4. lost foam paint according to claim 1, it is characterized in that, the proportioning of described each component is as follows: bauxite chamotte 55 weight portions, silica flour 35 weight portions, sodium bentonite 1 weight portion, CMC 0.5 weight portion, polyvinyl alcohol 2.5 weight portions, Ludox 3 weight portions, waterglass 0.5 weight portion, BR resin 6 weight portions, T-80 0.3 weight portion, ferric oxide red powder 3 weight portions.
5. the preparation method of a lost foam paint claimed in claim 1 is characterized in that, comprises following steps:
A. sodium bentonite is added water, stir into bentonite slurry;
B. bauxite chamotte, silica flour are stirred in milling apparatus, then add entry, so that powder is moistening and stir, as aggregate;
C. after CMC, polyvinyl alcohol, Ludox, waterglass, BR resin, T-80, ferric oxide red powder being mixed, add entry, be mixed with the aqueous solution;
D. in the described aqueous solution that the described aggregate adding step C that the described bentonite slurry that steps A is made and step B make makes, stir fully and mix, make described lost foam paint.
6. the preparation method of lost foam paint according to claim 5 is characterized in that, the agitating mode of described steps A is specially: with the rotating speed high-speed stirred more than the 1000rpm 6 hours.
7. according to claim 5 or the preparation method of 6 described lost foam paints, it is characterized in that, the agitating mode of described step D is specially: after 1 hour, kept the following rotating speed stirring at low speed of 600rpm 10 hours with the rotating speed high-speed stirred more than the 1000rpm.
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| CN2012103194828A CN102847871A (en) | 2012-08-31 | 2012-08-31 | Lost foam paint and preparation method thereof |
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| CN2012103194828A CN102847871A (en) | 2012-08-31 | 2012-08-31 | Lost foam paint and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103357814A (en) * | 2013-07-24 | 2013-10-23 | 翼城县福旺铸造实业有限公司 | Lost foam casting-use paint formula and technology method thereof |
| CN104874724A (en) * | 2015-05-20 | 2015-09-02 | 柳州市百田机械有限公司 | Cast steel lost foam coating |
| CN105817575A (en) * | 2016-05-27 | 2016-08-03 | 马鞍山市兴隆铸造有限公司 | Mica powder modified quartz-based lost foam paint containing silicon-boron molecular sieves and preparation method of mica powder modified quartz-based lost foam paint |
| CN105817573A (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 containing carbon fibers and preparation method of modified quartz-based mica powder full mold paint containing carbon fibers |
| CN105855460A (en) * | 2016-05-27 | 2016-08-17 | 马鞍山市兴隆铸造有限公司 | High-bending-strength quartz-based expendable pattern paint modified by mica powder and preparation method of high-bending-strength quartz-based expendable pattern paint |
| CN108311637A (en) * | 2017-01-17 | 2018-07-24 | 郭玉盼 | A kind of strong shell casting technique |
| CN109865796A (en) * | 2019-04-23 | 2019-06-11 | 福州大学 | A kind of copper alloy permanent mold foundry facing and preparation method thereof |
| CN110421116A (en) * | 2019-09-16 | 2019-11-08 | 安徽信息工程学院 | A kind of as cast condition WCB cast steel evaporative pattern water base environmental protection coating material and preparation method thereof |
| CN110614343A (en) * | 2019-10-24 | 2019-12-27 | 安徽信息工程学院 | Lost foam coating for producing automobile panel die and preparation and use methods thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103357814A (en) * | 2013-07-24 | 2013-10-23 | 翼城县福旺铸造实业有限公司 | Lost foam casting-use paint formula and technology method thereof |
| CN104874724A (en) * | 2015-05-20 | 2015-09-02 | 柳州市百田机械有限公司 | Cast steel lost foam coating |
| CN105817575A (en) * | 2016-05-27 | 2016-08-03 | 马鞍山市兴隆铸造有限公司 | Mica powder modified quartz-based lost foam paint containing silicon-boron molecular sieves and preparation method of mica powder modified quartz-based lost foam paint |
| CN105817573A (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 containing carbon fibers and preparation method of modified quartz-based mica powder full mold paint containing carbon fibers |
| CN105855460A (en) * | 2016-05-27 | 2016-08-17 | 马鞍山市兴隆铸造有限公司 | High-bending-strength quartz-based expendable pattern paint modified by mica powder and preparation method of high-bending-strength quartz-based expendable pattern paint |
| CN108311637A (en) * | 2017-01-17 | 2018-07-24 | 郭玉盼 | A kind of strong shell casting technique |
| CN109865796A (en) * | 2019-04-23 | 2019-06-11 | 福州大学 | A kind of copper alloy permanent mold foundry facing and preparation method thereof |
| CN110421116A (en) * | 2019-09-16 | 2019-11-08 | 安徽信息工程学院 | A kind of as cast condition WCB cast steel evaporative pattern water base environmental protection coating material and preparation method thereof |
| CN110614343A (en) * | 2019-10-24 | 2019-12-27 | 安徽信息工程学院 | Lost foam coating for producing automobile panel die and preparation and use methods thereof |
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Application publication date: 20130102 |