CN107052232A - A kind of full-mold casting coating and preparation method thereof - Google Patents
A kind of full-mold casting coating and preparation method thereof Download PDFInfo
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- CN107052232A CN107052232A CN201710509353.8A CN201710509353A CN107052232A CN 107052232 A CN107052232 A CN 107052232A CN 201710509353 A CN201710509353 A CN 201710509353A CN 107052232 A CN107052232 A CN 107052232A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
The present invention provides a kind of full-mold casting coating and preparation method thereof, is related to casting field, full-mold casting coating includes the raw material of following parts by weight：Silica flour, olive stone flour, schmigel, sodium bentonite, lignin sulfonic acid, dextrine powder, sodium carboxymethylcellulose, sodium benzoate, hollow glass micropearl, aluminum sulfate, polyvinyl alcohol, Ludox, brown iron oxide, n-octyl alcohol, graphite powder, zirconium English powder, attapulgite, water reducer and water；Preparation method comprises the following steps：(1) weigh raw material, (2) be sequentially prepared each mixed solution, (3) sequentially add reactor stirring.The present invention solves existing full-mold casting coating generally existing and is not respectively provided with strong wearability, high tack, excellent gas permeability and quick-drying under high temperature, low temperature environment, causes the problem of it can not meet heavy castings production requirement.
Description
Technical field
The invention belongs to casting field, and in particular to a kind of full-mold casting coating and preparation method thereof.
Background technology
The disperse system that full-mold casting coating is made up of the different material of a variety of properties, it, which is constituted, mainly includes fire proofed wood
The compositions such as material, binding agent, carrier, suspending agent and special additive are, it is necessary to which coating has good processing performance, service behaviour, matter
Measure stability and apply reappearance.Full-mold casting coating is coated in the outer surface of foamed polystyrene pattern, after ability after coating drying
Can moulding cast.Foamed plastics is airtight, and heat distortion temperature is low (about 70 DEG C or so), and the affinity to water is poor；Foamed plastics by
Lipid residue after heat fusing, gasification is more, and gas forming amount is big, if these gases and lipid residue can not be discharged in time, casting
The carbon defects such as gas, carburetting, Surface Wrinkle in iron will be produced.These features determine that full-mold paint should possess following performance requirements, i.e.,
Coating should have good wetability and being coated with property, good high-temperature resistant property and elevated temperature strength and good high temperature venting
Property.
But, existing full-mold casting coating generally existing is not respectively provided with strong wearability, height under high temperature, low temperature environment
Tack, excellent gas permeability and quick-drying, cause it to meet heavy castings production requirement.
The content of the invention
In order to solve existing full-mold casting coating generally existing be not respectively provided with high temperature, low temperature environment it is strong wear-resisting
Property, high tack, excellent gas permeability and quick-drying, cause the problem of it can not meet heavy castings production requirement, the present invention
Purpose be to provide a kind of full-mold casting coating and preparation method thereof, obtained full-mold casting coating can be in high temperature, low temperature ring
Strong wearability, high tack, excellent gas permeability and quick-drying are respectively provided with border, causes it to meet heavy castings production requirement
Advantage.
The invention provides following technical scheme：
A kind of full-mold casting coating, includes the raw material of following parts by weight：72-80 parts of silica flour, olive stone flour 10-14
Part, 11-15 parts of schmigel, 4-6 parts of sodium bentonite, 1-2 parts of lignin sulfonic acid, 2-3 parts of dextrine powder, sodium carboxymethylcellulose
0.8-1.4 parts, 0.4-0.6 parts of sodium benzoate, 1-2 parts of hollow glass micropearl, 7.1-8.9 parts of aluminum sulfate, polyvinyl alcohol 4.4-5.6
Part, 5-6 parts of Ludox, 0.5-0.7 parts of brown iron oxide, 0.04-0.06 parts of n-octyl alcohol, 30-40 parts of graphite powder, zirconium English powder 0.5-
12-20 parts of 0.9 part, 4-6 parts of attapulgite, 0.7-0.9 parts of water reducer and water.
Graphite powder is with the addition of in raw material, graphite powder has chemical property stabilization under normal temperature, fire resistance is good, wearability is good, profit
Slip is good, good toughness and the characteristics of good thermal shock.
Zirconium English powder is with the addition of in raw material, zirconium English powder has the advantages that fire resistance is good and wearability is good.
Attapulgite is with the addition of in raw material, attapulgite is a kind of clay of zeopan containing Shuifu County for having chain layer structure
Mineral, it has viscosity, plasticity, light weight, water suction is strong, dry that after-contraction is small, thickening property is good, suspension is good, thixotropy is good, flow
Levelling is good, thermal insulation is good and good weatherability advantage.
Preferably, the raw material of following parts by weight is included：76 parts of silica flour, 12 parts of olive stone flour, 13 parts of schmigel, sodium base are swollen
5 parts of profit soil, 1.5 parts of lignin sulfonic acid, 2.5 parts of dextrine powder, 1.1 parts of sodium carboxymethylcellulose, 0.5 part of sodium benzoate, hollow glass
1.5 parts of glass microballon, 8 parts of aluminum sulfate, 5 parts of polyvinyl alcohol, 5.5 parts of Ludox, 0.6 part of brown iron oxide, 0.05 part of n-octyl alcohol, graphite
16 parts of 35 parts of powder, 0.7 part of zirconium English powder, 5 parts of attapulgite, 0.8 part of water reducer and water.
Preferably, the water reducer is poly carboxylic acid series water reducer, and the water-reducing rate of poly carboxylic acid series water reducer is up to 45%, product
Stability is good, nontoxic, environmental protection.
Preferably, the particle size of the attapulgite is 200-300 mesh, and the attapulgite under the particle diameter can be with full mold
Other raw materials of cast paint are preferably well mixed.
Preferably, it is 2-4 parts of white glue with vinyl that the full-mold casting coating, which includes parts by weight, as binding agent, can be by
The raw material of full-mold casting coating is adhesively even closer, improves the globality of full-mold casting coating.
Preferably, the full-mold casting coating includes the precipitated calcium carbonate that parts by weight are 14-22 parts, precipitated calcium carbonate energy
Enough improve the wearability of full-mold casting coating, heat resistance and make coating not free settling.
Preferably, the full-mold casting coating also includes the nanometer silicon carbide that parts by weight are 11-17 parts, nanometer silicon carbide
With specific surface area is big, hardness is high, wearability good, self lubricity is good, heat-resisting quantity is good and fire resistance is good.
A kind of preparation method of full-mold casting coating, comprises the following steps：
(1) raw material is weighed according to the parts by weight of full-mold casting coating；
(2) sodium bentonite and dextrine powder are mixed with suitable quantity of water, stirred, stand 36-48 hours, sodium base is made swollen
Profit soil and dextrine powder water mixed liquid；
(3) polyvinyl alcohol is mixed with suitable quantity of water, be sufficiently stirred for, then stand 30-60min, be then slowly heated to 75-
95 DEG C are sufficiently stirred for, limpid to solution, without visible transparent grain, and polyvinyl alcohol water solution is made；
(4) aluminum sulfate is mixed with suitable quantity of water, and stirred, aluminum sulfate aqueous solution is made；
(5) remaining water is added in reactor, opens reactor, mixing speed is：100-120r/min, in stirring shape
Sodium carboxymethylcellulose is added under state into reactor, is heated, the temperature of reactor is slowly increased to 70-80 DEG C, constant temperature stirring
5-8min；Aluminum sulfate aqueous solution prepared by step (4), which is added in reactor, to stir；
(6) silica flour, olive stone flour, schmigel, hollow glass micropearl and brown iron oxide are uniformly mixed, then side is stirred
Side is added in the reactor of step (5)；
(7) sodium bentonite and paste for preparing Ludox, graphite powder, zirconium English powder, attapulgite, water reducer, step (2)
Polyvinyl alcohol water solution prepared by fine powder water mixed liquid and step (3) is well mixed, and is added to the stirring of reactor high speed
120-150 minutes；
(8) lignin sulfonic acid, sodium benzoate, n-octyl alcohol and other surplus stocks are added into reactor, 180-240 is stirred
Minute, mixing speed 20-30r/min is made full-mold casting coating.
The beneficial effects of the invention are as follows：
1st, the present invention solve existing full-mold casting coating generally existing be not respectively provided with high temperature, low temperature environment it is strong
Wearability, high tack, excellent gas permeability and quick-drying, cause the problem of it can not meet heavy castings production requirement.
2nd, graphite powder is with the addition of in raw material of the invention, graphite powder has chemical property stabilization, fire resistance under normal temperature good, resistance to
Good, lubricity is good for mill property, good toughness and the characteristics of good thermal shock.
3rd, zirconium English powder is with the addition of in raw material of the invention, zirconium English powder has the advantages that fire resistance is good and wearability is good.
4th, attapulgite is with the addition of in raw material of the invention, attapulgite is a kind of magnalium containing Shuifu County for having chain layer structure
Silicate clay mineral, its have viscosity, plasticity, light weight, water suction is strong, drying after-contraction is small, thickening property is good, suspension is good,
Thixotropy is good, good leveling property, thermal insulation are good and good weatherability advantage.
5th, the particle size of heretofore described attapulgite is 200-300 mesh, and the attapulgite under the particle diameter can be with
Other raw materials of full-mold casting coating are preferably well mixed.
6th, heretofore described full-mold casting coating includes the white glue with vinyl that parts by weight are 2-4 parts, can as binding agent
The raw material of full-mold casting coating is adhesively even closer, improve the globality of full-mold casting coating.
7th, heretofore described full-mold casting coating includes the precipitated calcium carbonate that parts by weight are 14-22 parts, lightweight carbonic acid
Calcium can improve the wearability of full-mold casting coating, heat resistance and make coating not free settling.
8th, heretofore described full-mold casting coating also includes the nanometer silicon carbide that parts by weight are 11-17 parts, nano-sized carbon
SiClx has that specific surface area is big, hardness is high, wearability good, self lubricity is good, heat-resisting quantity is good and fire resistance is good.
Embodiment
Embodiment 1
A kind of full-mold casting coating, includes the raw material of following parts by weight：76 parts of silica flour, 12 parts of olive stone flour, corundum
13 parts of powder, 5 parts of sodium bentonite, 1.5 parts of lignin sulfonic acid, 2.5 parts of dextrine powder, 1.1 parts of sodium carboxymethylcellulose, sodium benzoate
0.5 part, it is 1.5 parts of hollow glass micropearl, 8 parts of aluminum sulfate, 5 parts of polyvinyl alcohol, 5.5 parts of Ludox, 0.6 part of brown iron oxide, just pungent
16 parts of 0.05 part of alcohol, 35 parts of graphite powder, 0.7 part of zirconium English powder, 5 parts of attapulgite, 0.8 part of water reducer and water.
Graphite powder is with the addition of in raw material, graphite powder has chemical property stabilization under normal temperature, fire resistance is good, wearability is good, profit
Slip is good, good toughness and the characteristics of good thermal shock.
Zirconium English powder is with the addition of in raw material, zirconium English powder has the advantages that fire resistance is good and wearability is good.
Attapulgite is with the addition of in raw material, attapulgite is a kind of clay of zeopan containing Shuifu County for having chain layer structure
Mineral, it has viscosity, plasticity, light weight, water suction is strong, dry that after-contraction is small, thickening property is good, suspension is good, thixotropy is good, flow
Levelling is good, thermal insulation is good and good weatherability advantage.
Water reducer is poly carboxylic acid series water reducer, and the water-reducing rate of poly carboxylic acid series water reducer is up to 45%, and product stability is good, nothing
Malicious harmless, environmental protection.
The particle size of attapulgite is that the attapulgite under 200-300 mesh, the particle diameter can be with full-mold casting coating
Other raw materials are preferably well mixed.
Full-mold casting coating includes the white glue with vinyl that parts by weight are 3 parts, can be by full-mold casting coating as binding agent
Raw material is adhesively even closer, improves the globality of full-mold casting coating.
Full-mold casting coating includes the precipitated calcium carbonate that parts by weight are 18 parts, and precipitated calcium carbonate can improve cavityless casting
The wearability of coating, heat resistance and make coating not free settling.
Full-mold casting coating also includes the nanometer silicon carbide that parts by weight are 14 parts, and nanometer silicon carbide has specific surface area
Greatly, hardness is high, wearability is good, self lubricity is good, heat-resisting quantity is good and fire resistance is good.
A kind of preparation method of full-mold casting coating, comprises the following steps：
(1) raw material is weighed according to the parts by weight of full-mold casting coating；
(2) sodium bentonite and dextrine powder are mixed with suitable quantity of water, stirred, stand 36-48 hours, sodium base is made swollen
Profit soil and dextrine powder water mixed liquid；
(3) polyvinyl alcohol is mixed with suitable quantity of water, be sufficiently stirred for, then stand 30-60min, be then slowly heated to 75-
95 DEG C are sufficiently stirred for, limpid to solution, without visible transparent grain, and polyvinyl alcohol water solution is made；
(4) aluminum sulfate is mixed with suitable quantity of water, and stirred, aluminum sulfate aqueous solution is made；
(5) remaining water is added in reactor, opens reactor, mixing speed is：100-120r/min, in stirring shape
Sodium carboxymethylcellulose is added under state into reactor, is heated, the temperature of reactor is slowly increased to 70-80 DEG C, constant temperature stirring
5-8min；Aluminum sulfate aqueous solution prepared by step (4), which is added in reactor, to stir；
(6) silica flour, olive stone flour, schmigel, hollow glass micropearl and brown iron oxide are uniformly mixed, then side is stirred
Side is added in the reactor of step (5)；
(7) sodium bentonite and paste for preparing Ludox, graphite powder, zirconium English powder, attapulgite, water reducer, step (2)
Polyvinyl alcohol water solution prepared by fine powder water mixed liquid and step (3) is well mixed, and is added to the stirring of reactor high speed
120-150 minutes；
(8) lignin sulfonic acid, sodium benzoate, n-octyl alcohol and other surplus stocks are added into reactor, 180-240 is stirred
Minute, mixing speed 20-30r/min is made full-mold casting coating.
Embodiment 2
A kind of full-mold casting coating, includes the raw material of following parts by weight：72 parts of silica flour, 10 parts of olive stone flour, corundum
11 parts of powder, 4 parts of sodium bentonite, 1 part of lignin sulfonic acid, 2 parts of dextrine powder, 0.8 part of sodium carboxymethylcellulose, sodium benzoate 0.4
Part, 1 part of hollow glass micropearl, 7.1 parts of aluminum sulfate, 4.4 parts of polyvinyl alcohol, 5 parts of Ludox, 0.5 part of brown iron oxide, n-octyl alcohol
12 parts of 0.04 part, 30 parts of graphite powder, 0.5 part of zirconium English powder, 4 parts of attapulgite, 0.7 part of water reducer and water.
Graphite powder is with the addition of in raw material, graphite powder has chemical property stabilization under normal temperature, fire resistance is good, wearability is good, profit
Slip is good, good toughness and the characteristics of good thermal shock.
Zirconium English powder is with the addition of in raw material, zirconium English powder has the advantages that fire resistance is good and wearability is good.
Attapulgite is with the addition of in raw material, attapulgite is a kind of clay of zeopan containing Shuifu County for having chain layer structure
Mineral, it has viscosity, plasticity, light weight, water suction is strong, dry that after-contraction is small, thickening property is good, suspension is good, thixotropy is good, flow
Levelling is good, thermal insulation is good and good weatherability advantage.
Water reducer is poly carboxylic acid series water reducer, and the water-reducing rate of poly carboxylic acid series water reducer is up to 45%, and product stability is good, nothing
Malicious harmless, environmental protection.
The particle size of attapulgite is that the attapulgite under 200-300 mesh, the particle diameter can be with full-mold casting coating
Other raw materials are preferably well mixed.
Full-mold casting coating includes the white glue with vinyl that parts by weight are 2 parts, can be by full-mold casting coating as binding agent
Raw material is adhesively even closer, improves the globality of full-mold casting coating.
Full-mold casting coating includes the precipitated calcium carbonate that parts by weight are 14 parts, and precipitated calcium carbonate can improve cavityless casting
The wearability of coating, heat resistance and make coating not free settling.
Full-mold casting coating also includes the nanometer silicon carbide that parts by weight are 11 parts, and nanometer silicon carbide has specific surface area
Greatly, hardness is high, wearability is good, self lubricity is good, heat-resisting quantity is good and fire resistance is good.
A kind of preparation method of full-mold casting coating, comprises the following steps：
(1) raw material is weighed according to the parts by weight of full-mold casting coating；
(2) sodium bentonite and dextrine powder are mixed with suitable quantity of water, stirred, stand 36-48 hours, sodium base is made swollen
Profit soil and dextrine powder water mixed liquid；
(3) polyvinyl alcohol is mixed with suitable quantity of water, be sufficiently stirred for, then stand 30-60min, be then slowly heated to 75-
95 DEG C are sufficiently stirred for, limpid to solution, without visible transparent grain, and polyvinyl alcohol water solution is made；
(4) aluminum sulfate is mixed with suitable quantity of water, and stirred, aluminum sulfate aqueous solution is made；
(5) remaining water is added in reactor, opens reactor, mixing speed is：100-120r/min, in stirring shape
Sodium carboxymethylcellulose is added under state into reactor, is heated, the temperature of reactor is slowly increased to 70-80 DEG C, constant temperature stirring
5-8min；Aluminum sulfate aqueous solution prepared by step (4), which is added in reactor, to stir；
(6) silica flour, olive stone flour, schmigel, hollow glass micropearl and brown iron oxide are uniformly mixed, then side is stirred
Side is added in the reactor of step (5)；
(7) sodium bentonite and paste for preparing Ludox, graphite powder, zirconium English powder, attapulgite, water reducer, step (2)
Polyvinyl alcohol water solution prepared by fine powder water mixed liquid and step (3) is well mixed, and is added to the stirring of reactor high speed
120-150 minutes；
(8) lignin sulfonic acid, sodium benzoate, n-octyl alcohol and other surplus stocks are added into reactor, 180-240 is stirred
Minute, mixing speed 20-30r/min is made full-mold casting coating.
Embodiment 3
A kind of full-mold casting coating, includes the raw material of following parts by weight：80 parts of silica flour, 14 parts of olive stone flour, corundum
15 parts of powder, 6 parts of sodium bentonite, 2 parts of lignin sulfonic acid, 3 parts of dextrine powder, 1.4 parts of sodium carboxymethylcellulose, sodium benzoate 0.6
Part, 2 parts of hollow glass micropearl, 8.9 parts of aluminum sulfate, 5.6 parts of polyvinyl alcohol, 6 parts of Ludox, 0.7 part of brown iron oxide, n-octyl alcohol
20 parts of 0.06 part, 40 parts of graphite powder, 0.9 part of zirconium English powder, 6 parts of attapulgite, 0.9 part of water reducer and water.
Graphite powder is with the addition of in raw material, graphite powder has chemical property stabilization under normal temperature, fire resistance is good, wearability is good, profit
Slip is good, good toughness and the characteristics of good thermal shock.
Zirconium English powder is with the addition of in raw material, zirconium English powder has the advantages that fire resistance is good and wearability is good.
Attapulgite is with the addition of in raw material, attapulgite is a kind of clay of zeopan containing Shuifu County for having chain layer structure
Mineral, it has viscosity, plasticity, light weight, water suction is strong, dry that after-contraction is small, thickening property is good, suspension is good, thixotropy is good, flow
Levelling is good, thermal insulation is good and good weatherability advantage.
Water reducer is poly carboxylic acid series water reducer, and the water-reducing rate of poly carboxylic acid series water reducer is up to 45%, and product stability is good, nothing
Malicious harmless, environmental protection.
The particle size of attapulgite is that the attapulgite under 200-300 mesh, the particle diameter can be with full-mold casting coating
Other raw materials are preferably well mixed.
Full-mold casting coating includes the white glue with vinyl that parts by weight are 4 parts, can be by full-mold casting coating as binding agent
Raw material is adhesively even closer, improves the globality of full-mold casting coating.
Full-mold casting coating includes the precipitated calcium carbonate that parts by weight are 22 parts, and precipitated calcium carbonate can improve cavityless casting
The wearability of coating, heat resistance and make coating not free settling.
Full-mold casting coating also includes the nanometer silicon carbide that parts by weight are 17 parts, and nanometer silicon carbide has specific surface area
Greatly, hardness is high, wearability is good, self lubricity is good, heat-resisting quantity is good and fire resistance is good.
A kind of preparation method of full-mold casting coating, comprises the following steps：
(1) raw material is weighed according to the parts by weight of full-mold casting coating；
(2) sodium bentonite and dextrine powder are mixed with suitable quantity of water, stirred, stand 36-48 hours, sodium base is made swollen
Profit soil and dextrine powder water mixed liquid；
(3) polyvinyl alcohol is mixed with suitable quantity of water, be sufficiently stirred for, then stand 30-60min, be then slowly heated to 75-
95 DEG C are sufficiently stirred for, limpid to solution, without visible transparent grain, and polyvinyl alcohol water solution is made；
(4) aluminum sulfate is mixed with suitable quantity of water, and stirred, aluminum sulfate aqueous solution is made；
(5) remaining water is added in reactor, opens reactor, mixing speed is：100-120r/min, in stirring shape
Sodium carboxymethylcellulose is added under state into reactor, is heated, the temperature of reactor is slowly increased to 70-80 DEG C, constant temperature stirring
5-8min；Aluminum sulfate aqueous solution prepared by step (4), which is added in reactor, to stir；
(6) silica flour, olive stone flour, schmigel, hollow glass micropearl and brown iron oxide are uniformly mixed, then side is stirred
Side is added in the reactor of step (5)；
(7) sodium bentonite and paste for preparing Ludox, graphite powder, zirconium English powder, attapulgite, water reducer, step (2)
Polyvinyl alcohol water solution prepared by fine powder water mixed liquid and step (3) is well mixed, and is added to the stirring of reactor high speed
120-150 minutes；
(8) lignin sulfonic acid, sodium benzoate, n-octyl alcohol and other surplus stocks are added into reactor, 180-240 is stirred
Minute, mixing speed 20-30r/min is made full-mold casting coating.
Comparative example 1
A kind of full-mold casting coating, includes the raw material of following parts by weight：76 parts of silica flour, 12 parts of olive stone flour, corundum
13 parts of powder, 5 parts of sodium bentonite, 1.5 parts of lignin sulfonic acid, 2.5 parts of dextrine powder, 1.1 parts of sodium carboxymethylcellulose, sodium benzoate
0.5 part, it is 1.5 parts of hollow glass micropearl, 8 parts of aluminum sulfate, 5 parts of polyvinyl alcohol, 5.5 parts of Ludox, 0.6 part of brown iron oxide, just pungent
16 parts of 0.05 part of alcohol and water.
A kind of preparation method of full-mold casting coating, comprises the following steps：
(1) raw material is weighed according to the parts by weight of full-mold casting coating；
(2) sodium bentonite and dextrine powder are mixed with suitable quantity of water, stirred, stand 36-48 hours, sodium base is made swollen
Profit soil and dextrine powder water mixed liquid；
(3) polyvinyl alcohol is mixed with suitable quantity of water, be sufficiently stirred for, then stand 30-60min, be then slowly heated to 75-
95 DEG C are sufficiently stirred for, limpid to solution, without visible transparent grain, and polyvinyl alcohol water solution is made；
(4) aluminum sulfate is mixed with suitable quantity of water, and stirred, aluminum sulfate aqueous solution is made；
(5) remaining water is added in reactor, opens reactor, mixing speed is：100-120r/min, in stirring shape
Sodium carboxymethylcellulose is added under state into reactor, is heated, the temperature of reactor is slowly increased to 70-80 DEG C, constant temperature stirring
5-8min；Aluminum sulfate aqueous solution prepared by step (4), which is added in reactor, to stir；
(6) silica flour, olive stone flour, schmigel, hollow glass micropearl and brown iron oxide are uniformly mixed, then side is stirred
Side is added in the reactor of step (5)；
(7) prepared by the sodium bentonite and dextrine powder water mixed liquid and step (3) prepared Ludox, step (2) poly-
Vinyl alcohol aqueous solution is well mixed, and is added to reactor high speed stirring 120-150 minutes；
(8) lignin sulfonic acid, sodium benzoate and n-octyl alcohol are added into reactor, is stirred 180-240 minutes, mixing speed
20-30r/min, that is, be made full-mold casting coating.
Cavityless casting will be made in obtained full-mold casting coating and comparative example 1 in embodiment 1, embodiment 2 and embodiment 3
Coating property is tested, and test result is as shown in table 1：
From the data of table 1 compare as can be seen that it is an advantage of the invention that：
1st, a kind of full-mold casting coating and preparation method thereof, from the wear-resisting intensity measured as can be seen that embodiment 1-3's is resistance to
Mill intensity level is below comparative example 1, illustrates that the wearability of full-mold casting coating of the present invention is good.
2nd, a kind of full-mold casting coating and preparation method thereof, from the gas permeability value measured as can be seen that embodiment 1-3's is saturating
Gas is above comparative example 1, illustrates the good permeability of full-mold casting coating of the present invention.
3rd, a kind of full-mold casting coating and preparation method thereof, from the suspension value measured as can be seen that embodiment 1-3's is outstanding
Buoyancy value is above comparative example 1, illustrates that the suspension of full-mold casting coating of the present invention is good.
4th, a kind of full-mold casting coating and preparation method thereof, from the drying crack resistance measured as can be seen that embodiment 1-3
Drying crack resistance is superior to comparative example 1, illustrates that the drying crack resistance of full-mold casting coating of the present invention is good.
5th, a kind of full-mold casting coating and preparation method thereof, the brushability measured are as can be seen that embodiment 1-3 brushability
Comparative example 1 is above, illustrates that the tack of the full-mold casting coating is good.
6th, a kind of full-mold casting coating and preparation method thereof, density and the solid contents measured is as can be seen that embodiment
1-3 density and solid contents is above comparative example 1, illustrates full-mold casting coating wearability and attached under high and low temperature environment
The property is good.
7th, a kind of full-mold casting coating and preparation method thereof, from the data of each index measured as can be seen that embodiment 1
Embodiment 2, embodiment 3 and comparative example 1 are superior to, illustrates the composition of raw materials of full-mold casting coating of the present invention and the conjunction of preparation method
Rationality.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or equivalent substitution, all essences in the present invention are carried out to which part technical characteristic
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (8)
1. a kind of full-mold casting coating, it is characterised in that include the raw material of following parts by weight：72-80 parts of silica flour, olivine
10-14 parts of powder, 11-15 parts of schmigel, 4-6 parts of sodium bentonite, 1-2 parts of lignin sulfonic acid, 2-3 parts of dextrine powder, carboxymethyl are fine
Plain 0.8-1.4 parts of the sodium of dimension, 0.4-0.6 parts of sodium benzoate, 1-2 parts of hollow glass micropearl, 7.1-8.9 parts of aluminum sulfate, polyvinyl alcohol
4.4-5.6 parts, 5-6 parts of Ludox, 0.5-0.7 parts of brown iron oxide, 0.04-0.06 parts of n-octyl alcohol, 30-40 parts of graphite powder, zirconium English
12-20 parts of 0.5-0.9 parts of powder, 4-6 parts of attapulgite, 0.7-0.9 parts of water reducer and water.
2. full-mold casting coating according to claim 1, it is characterised in that include the raw material of following parts by weight：Silica flour
76 parts, 12 parts of olive stone flour, 13 parts of schmigel, 5 parts of sodium bentonite, 1.5 parts of lignin sulfonic acid, 2.5 parts of dextrine powder, carboxymethyl
1.1 parts of sodium cellulosate, 0.5 part of sodium benzoate, 1.5 parts of hollow glass micropearl, 8 parts of aluminum sulfate, 5 parts of polyvinyl alcohol, Ludox 5.5
Part, 0.6 part of brown iron oxide, 0.05 part of n-octyl alcohol, 35 parts of graphite powder, 0.7 part of zirconium English powder, 5 parts of attapulgite, 0.8 part of water reducer
With 16 parts of water.
3. full-mold casting coating according to claim 1, it is characterised in that：The water reducer is poly carboxylic acid series water reducer.
4. full-mold casting coating according to claim 1, it is characterised in that：The particle size of the attapulgite is 200-
300 mesh.
5. full-mold casting coating according to claim 1, it is characterised in that：The full-mold casting coating includes parts by weight
For 2-4 parts of white glue with vinyl.
6. full-mold casting coating according to claim 1, it is characterised in that：The full-mold casting coating includes parts by weight
For 14-22 parts of precipitated calcium carbonate.
7. full-mold casting coating according to claim 1, it is characterised in that：The full-mold casting coating also includes parts by weight
Number is 11-17 parts of nanometer silicon carbide.
8. a kind of preparation method of full-mold casting coating as described in claim 1-7 any one, it is characterised in that including
Following steps：
(1) raw material is weighed according to the parts by weight of full-mold casting coating；
(2) sodium bentonite and dextrine powder are mixed with suitable quantity of water, stirred, stand 36-48 hours, sodium bentonite is made
With dextrine powder water mixed liquid；
(3) polyvinyl alcohol is mixed with suitable quantity of water, be sufficiently stirred for, then stand 30-60min, be then slowly heated to 75-95 DEG C
It is sufficiently stirred for, it is limpid to solution, without visible transparent grain, polyvinyl alcohol water solution is made；
(4) aluminum sulfate is mixed with suitable quantity of water, and stirred, aluminum sulfate aqueous solution is made；
(5) remaining water is added in reactor, opens reactor, mixing speed is：100-120r/min, under stirring
Sodium carboxymethylcellulose is added into reactor, is heated, the temperature of reactor is slowly increased to 70-80 DEG C, constant temperature stirring 5-
8min；Aluminum sulfate aqueous solution prepared by step (4), which is added in reactor, to stir；
(6) silica flour, olive stone flour, schmigel, hollow glass micropearl and brown iron oxide are uniformly mixed, then added while stirring
In the reactor for entering step (5)；
(7) sodium bentonite and dextrine powder for preparing Ludox, graphite powder, zirconium English powder, attapulgite, water reducer, step (2)
Polyvinyl alcohol water solution prepared by water mixed liquid and step (3) is well mixed, and is added to reactor high speed stirring 120-150
Minute；
(8) lignin sulfonic acid, sodium benzoate, n-octyl alcohol and other surplus stocks, 180-240 points of stirring are added into reactor
Clock, mixing speed 20-30r/min is made full-mold casting coating.
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| CN107685130A (en) * | 2017-08-31 | 2018-02-13 | 安徽信息工程学院 | The water base environmental protection coating material of casting mold |
| CN108057840A (en) * | 2017-12-29 | 2018-05-22 | 天津宁康科技有限公司 | A kind of formula of the water base lost foam paint of low-temperature high-strength magnesium iron |
| CN109382485A (en) * | 2018-11-19 | 2019-02-26 | 吉林省众慧广博科技有限公司 | A kind of casting technique improving automobile-used disk like members casting accuracy |
| CN111302754A (en) * | 2020-03-31 | 2020-06-19 | 汉江弘源襄阳碳化硅特种陶瓷有限责任公司 | Lost foam coating for silicon carbide ceramic casting molding and preparation method thereof |
| CN111531120A (en) * | 2020-04-27 | 2020-08-14 | 埃肯铸造(中国)有限公司 | Preparation method of novel casting coating |
| CN111558686A (en) * | 2020-05-12 | 2020-08-21 | 唐山昊中科技有限公司 | Precoated sand shell type iron sand negative pressure casting coating |
| CN113231599A (en) * | 2021-05-20 | 2021-08-10 | 云南太标精工铸造有限公司 | Casting coating capable of improving surface smoothness of casting |
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| CN111558686A (en) * | 2020-05-12 | 2020-08-21 | 唐山昊中科技有限公司 | Precoated sand shell type iron sand negative pressure casting coating |
| CN113231599A (en) * | 2021-05-20 | 2021-08-10 | 云南太标精工铸造有限公司 | Casting coating capable of improving surface smoothness of casting |
| CN113231599B (en) * | 2021-05-20 | 2022-05-20 | 云南太标精工铸造有限公司 | Casting coating capable of improving surface smoothness of casting |
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Application publication date: 20170818 |