CN102974753A - Non-occupying coating and using method thereof - Google Patents
Non-occupying coating and using method thereof Download PDFInfo
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- CN102974753A CN102974753A CN2012105164263A CN201210516426A CN102974753A CN 102974753 A CN102974753 A CN 102974753A CN 2012105164263 A CN2012105164263 A CN 2012105164263A CN 201210516426 A CN201210516426 A CN 201210516426A CN 102974753 A CN102974753 A CN 102974753A
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Abstract
The invention discloses a non-occupying coating and a using method thereof. The non-occupying coating consists of a component A and a component B, wherein the component A and the component B are independently stored; the component A is formed by mixing the following components in percentage by weight: 35-40 percent of graphite powder, 2-5 percent of attapulgite, 10-15 percent of water glass and 43-50 percent of water; the component B is a curing agent and is an organic ester formed by mixing 60 percent of glycerol diacetate and 40 percent of glycerol triacetate; and the amount of the component B is 15-22 percent of mass of the water glass. According to the non-occupying coating, because the component A and the component B are independently stored, the available time of the non-occupying coating is not limited, and when the non-occupying coating is further used, the curing time of the coating layer formed from the component A can be adjusted by controlling the coating amount of the curing agent in the component B; and therefore, the non-occupying coating is controllable in curing time.
Description
Technical field
The present invention relates to a kind of coating, particularly a kind of non-occupy-place coating and using method thereof.
Background technology
In the casting process, often use coating to improve precision and the surface quality of foundry goods, meanwhile coating also improves the intensity on sand mold surface, when especially adopting clay sand mold and waterglass sand mold.Non-occupy-place coating claims again transfer coatings, and its operation principle is that core box or apperance surface are directly brushed or sprayed to coating, and then back-up sand, consolidation, dope layer and type (core) sand solidify under the constraint of core box simultaneously.Coating can be transferred to sand mold (core) surface from core box or apperance surface during molding, thereby makes the sand mold (core) with coating.Because the formed coating of this process does not occupy the active position of die cavity, so be called non-occupy-place Coating Method, also claims coating transfer method.Adopt this method can make coating ideally copy the surface of apperance or core box, do not have the coating surface defectives such as brush mark, trickling, accumulation, can obtain accurate bright and clean foundry goods, dimensional accuracy can compare favourably with model casting.In the process of moulding (coremaking), sand mold (core) must be behind non-occupancy paint solidification, the ability demoulding, otherwise dope layer comes off easily.The method of at present dope layer curing has two kinds, and a kind of is heating, and another kind is chemical method.Heating be owing to will consume the energy, and to the having relatively high expectations of mould, therefore hindered the application of this method.Chemical process is simple, cost is low is the wider a kind of method that adopts at present.But chemical method must add in advance curing agent and mix in the prescription of coating, so just can reach the purpose of paint solidification, but the method that in coating, adds in advance curing agent, affected the use of coating, when the curing agent addition is excessive, the up time of coating is shorter, and affects the intensity of coating; When the curing agent addition was too small, the hardening time of coating was longer, and demould time prolongs, and production efficiency reduces.
Summary of the invention
One of the object of the invention is to provide a kind of non-occupy-place coating in order to solve above-mentioned technical problem, the use of this non-occupy-place coating has easy to use, can be according to rhythm of production, arbitrarily the paint solidification time is adjusted, coating intensity is high, is a kind of new method that clay sand mold and waterglass sand mold use transfer coatings.
Two of purpose of the present invention provides the using method of above-mentioned a kind of non-occupy-place coating.
Technical scheme of the present invention
A kind of non-occupy-place coating is comprised of A component and B component, and A component, B component are deposited separately respectively;
Wherein said A component is counted by weight percentage by 35～40% graphite powder, 2～5% attapulgite, 10～15% waterglass and 43～50% water and is mixed;
Described B component is curing agent, the organic ester that is namely mixed by the glycerine triacetate of 60% glycerine diacetate esters and 40%, its consumption be in the A component waterglass quality 15～22%;
Wherein said graphite powder 180～200 orders;
Described attapulgite 180～200 orders;
Described waterglass NaOmSiO2nH2O, modulus are 2.3, and Baume degrees is 52.
The using method of above-mentioned a kind of non-occupy-place coating, step is as follows:
At first ready timber or metal mold surface are applied one deck lithium base grease, thickness is 0.05～0.1 millimeter;
Then, outside the lithium base grease coating, the A component applied that to form thickness thereon be 1.5～2 millimeters coating;
And then evenly spray one deck B component at the coating surface that the A component forms, its consumption be in the A component the waterglass amount 15～22%;
In the casting mold die cavity, insert immediately molding sand and ram sand molding 3～4h, in modeling process, be sprayed on the B component curing agent of the coating surface that the A component forms under the effect of Molding Sand, infiltrate among the A component, waterglass reaction with in the A component solidifies waterglass, after moulding is finished, sand mold is taken out from the casting mold die cavity, and at this moment closely non-occupy-place coating of one deck has been adhered on the molding sand surface;
Described molding sand is that granularity is 20～140 purpose clay-bonded sand or water-glass sands.
Beneficial effect of the present invention
A kind of non-occupy-place coating of the present invention, because A component, the B component is deposited separately, first with the A component according to the casting technique requirement, be coated in mo(U)ld face and form dope layer, the organic ester that is namely mixed by the glycerine triacetate of 60% glycerine diacetate esters and 40% in dope layer surface uniform spraying one deck B component is as the curing agent of the waterglass in the A component, in modeling process subsequently, the curing agent on dope layer surface infiltrates in the dope layer under the effect of external force, with the waterglass effect in the dope layer, thereby dope layer is solidified, therefore, the up time of a kind of non-occupy-place coating of the present invention is unrestricted, and the bond strength of non-occupy-place coating and sand mold is good, its bond strength adopts SUM coating surface wearability analyzer to measure, by the brush of the card clothing in the determining instrument and the friction of mo(U)ld face coating, to weigh through the coating powder that friction is scattered, its numerical value only is 1.0～1.2 grams.
Further, a kind of non-occupy-place coating of the present invention in use owing to can regulate by the quantity for spray of control B component curing agent the hardening time of the formed dope layer of A component, therefore, the hardening time of a kind of non-occupy-place coating of the present invention is controlled.
In sum, a kind of non-occupy-place coating of the present invention has easy to use, the characteristics that paintability is good.
The specific embodiment
Below by specific embodiment the present invention is further set forth, but do not limit the present invention.
The SUM coating surface wearability analyzer that embodiments of the invention are used, the auspicious sharp Science and Technology Ltd. of Wuxi City.
Embodiment 1
A kind of non-occupy-place coating is comprised of A component and B component, and A component, B component are deposited separately respectively;
Described A component is counted by weight percentage by 35% graphite powder, 5% attapulgite, 10% waterglass and 50% water and is mixed;
Described B component, i.e. curing agent, the organic ester that the glycerine diacetate esters by 60% and 40% glycerine triacetate mix, its consumption be in the A component waterglass quality 15%;
Wherein said graphite powder 180～200 orders;
Described attapulgite 180～200 orders;
Described waterglass NaOmSiO2nH2O, modulus are 2.3, and Baume degrees is 52.
The using method of above-mentioned a kind of non-occupy-place coating, step is as follows:
At first with ready timber casting mold, the surface applies one deck lithium base grease, and thickness is 0.1 millimeter;
Then the A component is coated in the coating that mo(U)ld face forms 2 millimeters;
Then the coating surface that forms in the A component evenly sprays one deck B component, its consumption be in the A component the waterglass amount 15%;
In the casting mold die cavity, insert molding sand immediately and ram sand molding, in modeling process, be sprayed on the B component curing agent of the coating surface that the A component forms under the effect of molding sand, infiltrate among the A component, waterglass reaction with in the A component is solidified waterglass, behind the 4h sand mold is taken out from the casting mold die cavity, at this moment the non-occupy-place coating of one deck has been adhered on the sand mold surface, and it is complete that coating applies shape;
Described molding sand adopts clay-bonded sand.
Behind the non-occupy-place paint solidification on the above-mentioned casting mold, the bond strength of non-occupy-place coating and sand mold adopts SUM coating surface wearability analyzer to measure, card clothing brush in the determining instrument and the friction of specimen surface coating are weighed through the coating powder that friction is scattered, and its numerical value is 1.2 grams.
As adopt at present curing agent directly to be added in the coating and brush, the coating powder weight that its friction is scattered Duos 20～30% than the present invention.
Embodiment 2
A kind of non-occupy-place coating is comprised of A component and B component, and A component, B component are deposited separately respectively;
Described A component is counted by weight percentage by 40% graphite powder, 2% attapulgite, 15% waterglass and 43% water and is mixed;
Described B component, i.e. curing agent, the organic ester that the glycerine diacetate esters by 60% and 40% glycerine triacetate mix, its consumption be in the A component waterglass quality 22%;
Wherein said graphite powder 180～200 orders;
Described attapulgite 180～200 orders;
Described waterglass NaOmSiO2nH2O, modulus are 2.3, and Baume degrees is 52;
The using method of above-mentioned a kind of non-occupy-place coating, step is as follows:
At first with ready metal Gray Cast HT200 casting mold, the surface applies one deck lithium base grease, and thickness is 0.05 millimeter;
Then the A component is coated in the coating that mo(U)ld face forms 1.5 millimeters;
Then the coating surface that forms in the A component evenly sprays one deck B component, its consumption be in the A component the waterglass amount 22%;
In the casting mold die cavity, insert molding sand immediately and ram sand molding, in modeling process, be sprayed on the B component curing agent of the coating surface that the A component forms under the effect of molding sand, infiltrate among the A component, waterglass reaction with in the A component is solidified waterglass, behind the 3h sand mold is taken out from the casting mold die cavity, at this moment the non-occupy-place coating of one deck has been adhered on the sand mold surface, and it is complete that coating applies shape;
The employing water-glass sand of described molding sand (modulus of water glass is 2.3).
Behind the non-occupy-place paint solidification on the above-mentioned casting mold, the bond strength of non-occupy-place coating and sand mold adopts SUM coating surface wearability analyzer to measure, the card clothing brush in the determining instrument and the friction of specimen surface coating, the coating powder that is scattered through friction, by weighing, its numerical value is 1.0 grams.
As adopt at present curing agent directly to be added in the coating and brush, the coating powder weight that its friction is scattered Duos 20～30% than the present invention.
A kind of non-occupy-place coating of the present invention in sum, because A component, the B component is that curing agent is deposited separately, during use first with the A component according to the casting technique requirement, be coated in mo(U)ld face and form dope layer, at dope layer surface uniform spraying one deck B component curing agent, in modeling process subsequently, the curing agent on dope layer surface infiltrates in the dope layer under the effect of external force, with the waterglass effect in the dope layer, thereby dope layer is solidified, therefore, the up time of a kind of non-occupy-place coating of the present invention is unrestricted, and the bond strength of non-occupy-place coating and sand mold is better than curing agent is directly added the coating of brushing rear gained in the coating and the bond strength of sand mold.
Above said content only is the basic explanation of the present invention under conceiving, and according to any equivalent transformation that technical scheme of the present invention is done, all should belong to protection scope of the present invention.
Claims (4)
1. a non-occupy-place coating is characterized in that being comprised of A component and B component, and A component, B component are deposited separately respectively;
Wherein said A component is counted by weight percentage by 35～40% graphite powder, 2～5% attapulgite, 10～15% waterglass and 43～50% water and is mixed;
Described B component is curing agent, the organic ester that is namely mixed by the glycerine triacetate of 60% glycerine diacetate esters and 40%, its consumption be in the A component waterglass quality 15～22%;
Wherein said graphite powder 180～200 orders;
Described attapulgite 180～200 orders;
Described waterglass NaOmSiO2nH2O, modulus are 2.3, and Baume degrees is 52.
2. a kind of non-occupy-place coating as claimed in claim 1 is characterized in that described A component, counts by weight percentage by 35% graphite powder, 5% attapulgite, 10% waterglass and 50% water to mix;
Described B component, i.e. curing agent, the organic ester that the glycerine diacetate esters by 60% and 40% glycerine triacetate mix, its consumption be in the A component waterglass quality 15%.
3. a kind of non-occupy-place coating as claimed in claim 1 is characterized in that described A component, counts by weight percentage by 40% graphite powder, 2% attapulgite, 15% waterglass and 43% water to mix;
Described B component, i.e. curing agent, the organic ester that the glycerine diacetate esters by 60% and 40% glycerine triacetate mix, its consumption be in the A component waterglass quality 22%.
4. such as the using method of claim 1,2 or 3 described a kind of non-occupy-place coating, it is characterized in that step is as follows:
At first ready timber or metal mold surface are applied one deck lithium base grease, thickness is 0.05 ~ 0.1 millimeter;
Then, outside the lithium base grease coating, the A component applied that to form thickness thereon be 1.5 ~ 2 millimeters coating;
And then evenly spray one deck B component at the coating surface that the A component forms, and in the casting mold die cavity, insert molding sand immediately and ram sand molding, behind 3～4h sand mold is taken out from the casting mold die cavity, at this moment closely non-occupy-place coating of one deck has been adhered on the sand mold surface;
Described molding sand is that granularity is 20～140 purpose clay-bonded sand or water-glass sands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210516426.3A CN102974753B (en) | 2012-12-06 | 2012-12-06 | Non-occupying coating and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210516426.3A CN102974753B (en) | 2012-12-06 | 2012-12-06 | Non-occupying coating and using method thereof |
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| CN102974753A true CN102974753A (en) | 2013-03-20 |
| CN102974753B CN102974753B (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210516426.3A Expired - Fee Related CN102974753B (en) | 2012-12-06 | 2012-12-06 | Non-occupying coating and using method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439080A (en) * | 2014-11-15 | 2015-03-25 | 安徽省新方尊铸造科技有限公司 | Accurate forming metal mold casting method adopting porous steel and non-occupying coating |
| CN112157209A (en) * | 2020-10-09 | 2021-01-01 | 马鞍山方圆动力科技有限公司 | Non-occupying coating and preparation method thereof |
Citations (5)
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| CN1049988A (en) * | 1990-10-26 | 1991-03-20 | 东南大学 | Moulding technology with compound water-glass sand for casting base of enamal bathtub |
| JPH08117922A (en) * | 1994-10-26 | 1996-05-14 | Kao Corp | Mold forming curing agent composition and production of mold |
| CN101444839A (en) * | 2008-12-30 | 2009-06-03 | 吉林大学 | Lost foam casting-penetrating method for improving heat resistance of gray cast-iron based casting surface |
| CN101486068A (en) * | 2009-02-12 | 2009-07-22 | 上海市机械制造工艺研究所有限公司 | Alcohol group zircon powder coating for large casting |
| CN101817058A (en) * | 2010-03-30 | 2010-09-01 | 深圳市景鼎现代科技有限公司 | Shield type coating composition and preparation process of coating thereof |
-
2012
- 2012-12-06 CN CN201210516426.3A patent/CN102974753B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049988A (en) * | 1990-10-26 | 1991-03-20 | 东南大学 | Moulding technology with compound water-glass sand for casting base of enamal bathtub |
| JPH08117922A (en) * | 1994-10-26 | 1996-05-14 | Kao Corp | Mold forming curing agent composition and production of mold |
| CN101444839A (en) * | 2008-12-30 | 2009-06-03 | 吉林大学 | Lost foam casting-penetrating method for improving heat resistance of gray cast-iron based casting surface |
| CN101486068A (en) * | 2009-02-12 | 2009-07-22 | 上海市机械制造工艺研究所有限公司 | Alcohol group zircon powder coating for large casting |
| CN101817058A (en) * | 2010-03-30 | 2010-09-01 | 深圳市景鼎现代科技有限公司 | Shield type coating composition and preparation process of coating thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439080A (en) * | 2014-11-15 | 2015-03-25 | 安徽省新方尊铸造科技有限公司 | Accurate forming metal mold casting method adopting porous steel and non-occupying coating |
| CN112157209A (en) * | 2020-10-09 | 2021-01-01 | 马鞍山方圆动力科技有限公司 | Non-occupying coating and preparation method thereof |
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| CN102974753B (en) | 2014-12-17 |
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Granted publication date: 20141217 Termination date: 20171206 |