CN107952929A - A kind of water base lost foam casting coating - Google Patents
A kind of water base lost foam casting coating Download PDFInfo
- Publication number
- CN107952929A CN107952929A CN201711180947.5A CN201711180947A CN107952929A CN 107952929 A CN107952929 A CN 107952929A CN 201711180947 A CN201711180947 A CN 201711180947A CN 107952929 A CN107952929 A CN 107952929A
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- China
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- parts
- coating
- water
- attapulgite
- bauxite
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paints Or Removers (AREA)
Abstract
The present invention relates to a kind of lost foam casting coating, its starting components and each component parts by weight are：1.6~2.2 parts of latex powder, 0.2~0.5 part of xanthans, 3~4 parts of attapulgite, 0.3~1 part of CMC, 1~1.6 part of aging starch, 50 60 parts of silica flour, 80 100 parts of bauxite, 0.010~0.015 part of bleeding agent；Beneficial effect is the present invention compared with prior art：It is formulated design rationally, and preparation process is fine, and end properties are stablized, with good economic efficiency and social value.
Description
Technical field
The invention belongs to Technology of EPC field, is related to a kind of water base cast paint and preparation method thereof, coating is fitted
Wide with property, preparation process is fine, and end properties are stablized.
Background technology
Lost foam casting coating is one of two big key technologies of lost foam casting process.The performance of coating directly affects casting
The quality of part, the acquisition pattern of existing coating mainly have enterprise voluntarily to prepare and buy finished product coating, and the finished product of market sale applies
Material has adhesive solids coating and paste coating, its price is high, quality is unstable, for magnesium iron or gray iron sole disposition, fits
For answering property difference, it is necessary to set up mixing plant, input is big, being coated with property, trickling property deficiency, is also easy to produce and shows money or valuables one carries unintentionally after Bai Mo immersion coating；Coating
Being coated with property, trickling property, gas permeability and intensity comprehensive performance it is bad.
Therefore, the water base cast paint for researching and developing a kind of being coated with property, trickling property, gas permeability and intensity high comprehensive performance has
Good economic benefit and social value.
The content of the invention
It is an object of the invention to overcome shortcoming existing in the prior art, seek a kind of water base lost foam casting coating and its
Preparation method, the being coated with property of water base cast paint, trickling property, gas permeability and intensity comprehensive performance are bad in the prior art for solution,
The problem of end properties are unstable.
To achieve these goals, a kind of water base lost foam casting coating of the present invention, its starting components and each
Composition weight number is：
1.6~2.2 parts of latex powder, 0.2~0.5 part of xanthans, 3~4 parts of attapulgite, 0.3~1 part of CMC, curing are formed sediment
1~1.6 part of powder, 50-60 parts of silica flour, 80-100 parts of bauxite, 0.010~0.015 part of bleeding agent；
Preferably, 2 parts of the latex powder, 0.45 part of xanthans, 4 parts of attapulgite, 0.4 part of CMC, aging starch 1.5
Part, 50 parts of silica flour, 100 parts of bauxite, 0.015 part of bleeding agent；
The preparation method is as follows：
(1) first CMC, water are put into material-compound tank, then add latex powder, xanthans, attapulgite, stirred two hours,
Stir pulp；
(2) and then aging starch and bleeding agent are sequentially added, then silica flour, bauxite, stirring 3-4 is added into material-compound tank
Hour, stir pulp；
(3) into material-compound tank plus water, stirring is continued to obtaining the homogeneous latex emulsion shape coating that Baume degrees is 1.7-1.9.
The silica flour is as refractory powder, technical indicator SiO2>=98%, the sum of CaO, MgO, Na2O, K2O≤
1.0%, scaling loss≤0.5% (1000 DEG C of holding 1h), refractoriness >=1690 DEG C, granularity, it is swollen to cross 200~270 mesh sieves quartz heat
Swollen coefficient is big, especially becomes to produce in 573 DEG C of phases and drastically expands, easily lead to coating cracking, peel off/before molten iron injection, heat
Expansion produces stomata, and hot permeability can be with the propulsion of casting metals liquid level, the gas that evaporative pattern gasification is produced and property
Air within the walls, is successfully discharged to outside type from coating through sand mold wall.
The bauxite：Al2O3 ＞ 65%, the sum of CaO, Fe2O3≤1.1%, through high-temperature calcination through broken, washing and mistake
Clinker form, refractoriness >=1770 DEG C, density >=2.55g/cm3 are obtained after sieve；The attapulgite, density 1.6g/cm3, not
2~3 grades of family name's hardness；
The latex powder has slight erosion, improves being coated with property, the good thixotropy of xanthans, is not easy to trickle, (can be again
Dispersed latex powder forms a film after disperseing and plays humidification as second of adhesive；Protecting colloid absorbed by mortar (into
It will not be fallen after film by water destruct, or " twice dispersing ")；The fluoropolymer resin of film forming is as reinforcing material distribution and whole body
In system, so as to add the cohesive force of mortar；Workability is improved in wet mortar, improves mobile performance, adds thixotroping to hang down with anti-
Property, cohesive force is improved, extends the open hour；Strengthen water-retaining property.Mortar improves tensile strength after curing, increase bend resistance intensity,
Reduce elasticity modulus, improve deformability, increase material compactness, increase wear-resistant strength, improve cohesive strength；It is deep to reduce carbonization
Degree, reduces material water imbibition；Make material that there is splendid hydrophobicity, it is not necessary to store and transport with together with water, reduce transport into
This；Storage period is longer, antifreeze, is easy to take care of；Packaging volume is small, light-weight, easy to use；It can be mixed with hydraulicity adhesive,
The premix of synthetic resin modification is made into, when use, need to only add water, this is not only avoided going wrong in building site mixture,
Also the security of product transportation processing can be improved.
The xanthans, it is white or faint yellow in class, there is higher viscosity under aqueous solution low concentration, mass fraction is
The aqueous solution of 1000mg/kg, its viscosity are 40-50Pa.s, pseudoplastic behavior and good rheological property, good thickener and stabilizer,
Improve the viscosity of coating.Attapulgite, which strengthens elevated temperature strength and low temperature intensity, powdery CMC, makes coating have good suspension,
Aging starch has preferable low temperature intensity, increases gas permeability after meeting molten iron burning, silica flour and bauxite are then preferable resistance to
High temperature is expected admittedly；
The attapulgite, Density Density 1.6g/cm3,2~3 grades of Mohs' hardness, stable chemical performance, is not easy to be electrolysed
Matter is flocculated, its absorption speed is opened, and water suction is not easy to expand, and high-speed stirred colored stone grogs disperses, and breaks its acicular crystal beam
And mixed and disorderly grid is formed, and grid constraint liquid, the increase of system viscosity, and there is thixotropy.
The sodium carboxymethylcellulose CMC, performance indicator/technical indicator/technical conditions are 2% solution viscosity >=800-
1200mPa.s, sodium content 6.5-8.5%, pH value 6.5-8.0, water content 10.0, chloride content≤3.0%, a huge sum of money
Belong to (%) (in terms of Pb)≤0.002%, iron content≤0.02%, potassium content≤0.0002% is soluble easily in water, and colloid is formed with water
Solution, chemical paste, certain heat endurance, makes refractory material be not easy to precipitate.
Beneficial effect is the present invention compared with prior art：Coating is simple, and raw material is easy to get, and cost is low, operability
By force, now with the current coating quality is stablized, and high temperature deciduous is good, sand not easy to stick；There are higher refractoriness and chemical stability, pouring
Do not melted during note by high-temperature metal, also do not occur chemical reaction with metal oxide and caused by the viscous husky phenomenon of chemistry；Have preferably
Being coated with property and adhesion, can the painting of even compact hang over foam plastics mould surface；Coating has preferable strength and stiffness, makes
Mould carry and mould assembling during will not be damaged, can keep apperance indeformable after the drying, cast when can bear by
The molding sand back pressure for gasifying in apperance and producing；Coating has preferable hot permeability, can with the propulsion of casting metals liquid level,
The air in gas and cavity that evaporative pattern gasification is produced, is successfully discharged to outside type from coating through sand mold wall.Its formula is set
Meter is reasonable, and preparation process is fine, and end properties are stablized, with good economic efficiency and social value.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment one
A kind of water base cast paint of the present invention, includes the raw material of following parts by weight：1.6 parts of latex powder, xanthans 0.2
Part, 3 parts of attapulgite, 0.3 part of CMC, 1 part of aging starch, 50 parts of silica flour, 80 parts of bauxite, 0.010 part of bleeding agent；
The preparation method is as follows：
(1), add in material-compound tank and first CMC, water are put into the circular bodies of dispersion machine, then add latex powder, Huang
Virgin rubber, attapulgite, are stirred two hours, stir pulp；
(2) then. sequentially adds aging starch and bleeding agent, then silica flour, bauxite, stirring 3- are added into material-compound tank
4 it is small when, stir pulp；
(3), into grout mixer plus water, stirring is continued to obtaining the homogeneous latex emulsion shape coating that Baume degrees is 1.7-1.9；
Embodiment two
A kind of water base cast paint of the present invention, includes the raw material of following parts by weight：2.2 parts of latex powder, xanthans 0.5
Part, 4 parts of attapulgite, 1 part of CMC, 1.6 parts of aging starch, 60 parts of silica flour, 100 parts of bauxite, 0.015 part of bleeding agent；
The preparation method is as follows：
(1), add in material-compound tank and first CMC, water are put into the circular bodies of dispersion machine, then add latex powder, Huang
Virgin rubber, attapulgite, are stirred two hours, stir pulp；
(2) and then aging starch and bleeding agent are sequentially added, then silica flour, bauxite, stirring 3- is added into material-compound tank
4 it is small when, stir pulp；
(3), into grout mixer plus water, stirring is continued to obtaining the homogeneous latex emulsion shape coating that Baume degrees is 1.7-1.9；
Embodiment three
A kind of water base cast paint of the present invention, includes the raw material of following parts by weight：2 parts of latex powder, 0.4 part of xanthans,
3~4 parts of attapulgite, 0.3~1 part of CMC, 1~1.6 part of aging starch, 50-60 parts of silica flour, 80 parts of bauxite, bleeding agent
0.010~0.015 part；
The preparation method is as follows：
(1), add in material-compound tank and first CMC, water are put into the circular bodies of dispersion machine, then add latex powder, Huang
Virgin rubber, attapulgite, are stirred two hours, stir pulp；
(2) and then aging starch and bleeding agent are sequentially added, then silica flour, bauxite, stirring 3- is added into material-compound tank
4 it is small when, stir pulp；
(3), into grout mixer plus water, stirring is continued to obtaining the homogeneous latex emulsion shape coating that Baume degrees is 1.7-1.9；
Example IV
A kind of water base cast paint of the present invention, includes the raw material of following parts by weight：2 parts of latex powder, 0.45 part of xanthans,
4 parts of attapulgite, 0.4 part of CMC, 1.5 parts of aging starch, 50 parts of silica flour, 100 parts of bauxite, 0.015 part of bleeding agent；
The preparation method is as follows：
(1), add in material-compound tank and first CMC, water are put into the circular bodies of dispersion machine, then add latex powder, Huang
Virgin rubber, attapulgite, are stirred two hours, stir pulp；
(2) and then aging starch and bleeding agent are sequentially added, then silica flour, bauxite, stirring 3- is added into material-compound tank
4 it is small when, stir pulp；
(3), into grout mixer plus water, stirring is continued to obtaining the homogeneous latex emulsion shape coating that Baume degrees is 1.7-1.9；
Embodiment five
A kind of water base cast paint of the present invention, includes the raw material of following parts by weight：1.6~2.2 parts of latex powder, xanthans
0.2~0.5 part, 3~4 parts of attapulgite, 0.3~1 part of CMC, 1~1.6 part of aging starch, 55 parts of silica flour, bauxite 90
Part, 0.010~0.015 part of bleeding agent；
The preparation method is as follows：
(1), add in material-compound tank and first CMC, water are put into the circular bodies of dispersion machine, then add latex powder, Huang
Virgin rubber, attapulgite, are stirred two hours, stir pulp；
(2) and then aging starch and bleeding agent are sequentially added, then silica flour, bauxite, stirring 3- is added into material-compound tank
4 it is small when, stir pulp；
(3), into grout mixer plus water, stirring is continued to obtaining the homogeneous latex emulsion shape coating that Baume degrees is 1.7-1.9；
Embodiment six
A kind of water base cast paint of the present invention, includes the raw material of following parts by weight：1.8 parts of latex powder, xanthans 0.3
Part, 3 parts of attapulgite, 0.5 part of CMC, 1.3 parts of aging starch, 57 parts of silica flour, 93 parts of bauxite, 0.012 part of bleeding agent；
The preparation method is as follows：
(1), add in material-compound tank and first CMC, water are put into the circular bodies of dispersion machine, then add latex powder, Huang
Virgin rubber, attapulgite, are stirred two hours, stir pulp；
(2) and then aging starch and bleeding agent are sequentially added, then silica flour, bauxite, stirring 3- is added into material-compound tank
4 it is small when, stir pulp；
(3), into grout mixer plus water, stirring is continued to obtaining the homogeneous latex emulsion shape coating that Baume degrees is 1.7-1.9；
With the Water-based coating for lost foam casting made by above-described embodiment, detected through laboratory properties as follows：Disappear
The density for losing die coating material be 1.6-1.7g/cm 3, place 72 it is small when after suspensibility more than 98%；Concentration, is measured with Baume Hydrometer
Concentration reaches 1.7-1.9；Viscosity, pours into No. 4 standard flow cups by manufactured coating, is 31-34s with manual time-keeping；Permeability and
Being coated with property, reaches 1.6 ㎜ after tested；Levelability, coating surface is smooth bright and clean, Ra<6；The low temperature gas permeability of coating is higher than 12cm
2 (kPamin) -1, hot permeability are more than 30cm 2 (kPamin) -1.The being coated with property of the water base cast paint, stream
Dropping down property, gas permeability and intensity excellent combination property, end properties are stablized.
It should be noted that it is only that the preferred embodiment of the present invention is described above, not to the structure of the present invention
Think and scope is defined, on the premise of design philosophy of the present invention is not departed from, technology of the those skilled in the art to the present invention
The changes and improvements that scheme is made, belong to protection scope of the present invention.
Claims (3)
- A kind of 1. water base lost foam casting coating, it is characterised in that：The coating includes the raw material of following parts by weight：Latex 1.6~2.2 parts of powder, 0.2~0.5 part of xanthans, 3~4 parts of attapulgite, 0.3~1 part of CMC, 1~1.6 part of aging starch, stone 50-60 parts of English powder, 80-100 parts of bauxite, 0.010~0.015 part of bleeding agent.
- A kind of 2. water base lost foam casting coating according to claim 1, it is characterised in that：The coating includes following The raw material of parts by weight：2 parts of latex powder, 0.45 part of xanthans, 4 parts of attapulgite, 0.4 part of CMC, 1.5 parts of aging starch, stone 50 parts of English powder, 100 parts of bauxite, 0.015 part of bleeding agent.
- A kind of 3. water base lost foam casting coating as claimed in claim 1, it is characterised in that：Preparation method is as follows：(1) first CMC, water are put into material-compound tank, then add latex powder, xanthans, attapulgite, stirred two hours, stirring Pulp；(2) and then aging starch and bleeding agent are sequentially added, then addition silica flour, bauxite, stirring 3-4 are small into material-compound tank When, stir pulp；(3) into material-compound tank plus water, stirring is continued to obtaining the homogeneous latex emulsion shape coating that Baume degrees is 1.7-1.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711180947.5A CN107952929A (en) | 2017-11-23 | 2017-11-23 | A kind of water base lost foam casting coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711180947.5A CN107952929A (en) | 2017-11-23 | 2017-11-23 | A kind of water base lost foam casting coating |
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| CN107952929A true CN107952929A (en) | 2018-04-24 |
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| CN201711180947.5A Pending CN107952929A (en) | 2017-11-23 | 2017-11-23 | A kind of water base lost foam casting coating |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108976919A (en) * | 2018-08-16 | 2018-12-11 | 郑州远东耐火材料有限公司 | It is a kind of using fused cast refractories dust-removing powder as the sand mo(u)ld special coating of main material production |
| CN109181422A (en) * | 2018-08-16 | 2019-01-11 | 郑州远东耐火材料有限公司 | It is a kind of using fused cast refractories rubbed brick powder as the sand mo(u)ld special coating of main material production |
| CN110449547A (en) * | 2019-08-20 | 2019-11-15 | 安徽信息工程学院 | A kind of Novel lost foam water base environmental protection coating material of WCB cast steel |
| CN110666098A (en) * | 2019-11-08 | 2020-01-10 | 含山县能华铸造有限公司 | Preparation method of quick-drying water-based lost foam casting coating |
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| CN101569918A (en) * | 2009-06-10 | 2009-11-04 | 刘则斌 | Coating for lost foam cast iron |
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| CN104353777A (en) * | 2014-11-05 | 2015-02-18 | 襄阳聚力炉衬材料有限公司 | Cast iron evaporative pattern coating and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108976919A (en) * | 2018-08-16 | 2018-12-11 | 郑州远东耐火材料有限公司 | It is a kind of using fused cast refractories dust-removing powder as the sand mo(u)ld special coating of main material production |
| CN109181422A (en) * | 2018-08-16 | 2019-01-11 | 郑州远东耐火材料有限公司 | It is a kind of using fused cast refractories rubbed brick powder as the sand mo(u)ld special coating of main material production |
| CN109181422B (en) * | 2018-08-16 | 2020-06-30 | 郑州远东耐火材料有限公司 | Special coating for sand mold produced by using fused brick grinding powder as main raw material |
| CN108976919B (en) * | 2018-08-16 | 2020-06-30 | 郑州远东耐火材料有限公司 | Sand mold special coating produced by taking fused brick dust removal powder as main raw material |
| CN110449547A (en) * | 2019-08-20 | 2019-11-15 | 安徽信息工程学院 | A kind of Novel lost foam water base environmental protection coating material of WCB cast steel |
| CN110666098A (en) * | 2019-11-08 | 2020-01-10 | 含山县能华铸造有限公司 | Preparation method of quick-drying water-based lost foam casting coating |
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Application publication date: 20180424 |