CN102397983A - Full mold casing coating - Google Patents
Full mold casing coating Download PDFInfo
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- CN102397983A CN102397983A CN201110392541XA CN201110392541A CN102397983A CN 102397983 A CN102397983 A CN 102397983A CN 201110392541X A CN201110392541X A CN 201110392541XA CN 201110392541 A CN201110392541 A CN 201110392541A CN 102397983 A CN102397983 A CN 102397983A
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- parts
- sodium
- coating
- cavityless casting
- casting coating
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- 239000011248 coating agent Substances 0.000 title claims abstract description 42
- 238000000576 coating method Methods 0.000 title claims abstract description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 8
- 229920001353 Dextrin Polymers 0.000 claims abstract description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 7
- 229940067573 brown iron oxide Drugs 0.000 claims abstract description 7
- 239000011521 glass Substances 0.000 claims abstract description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 7
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims abstract description 7
- 235000010234 sodium benzoate Nutrition 0.000 claims abstract description 7
- 239000004299 sodium benzoate Substances 0.000 claims abstract description 7
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 7
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 7
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229940080314 sodium bentonite Drugs 0.000 claims abstract description 5
- 229910000280 sodium bentonite Inorganic materials 0.000 claims abstract description 5
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims description 24
- 235000013312 flour Nutrition 0.000 claims description 24
- 239000000377 silicon dioxide Substances 0.000 claims description 13
- 240000007817 Olea europaea Species 0.000 claims description 11
- 239000004575 stone Substances 0.000 claims description 11
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 235000012216 bentonite Nutrition 0.000 claims description 6
- FYGDTMLNYKFZSV-MRCIVHHJSA-N dextrin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)OC1O[C@@H]1[C@@H](CO)OC(O[C@@H]2[C@H](O[C@H](O)[C@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O FYGDTMLNYKFZSV-MRCIVHHJSA-N 0.000 claims description 6
- 229920005610 lignin Polymers 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 3
- 150000003460 sulfonic acids Chemical class 0.000 claims description 3
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 2
- 229940092782 bentonite Drugs 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 238000010115 full-mold casting Methods 0.000 abstract description 3
- FOGYNLXERPKEGN-UHFFFAOYSA-N 3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfopropyl)phenoxy]propane-1-sulfonic acid Chemical compound COC1=CC=CC(CC(CS(O)(=O)=O)OC=2C(=CC(CCCS(O)(=O)=O)=CC=2)OC)=C1O FOGYNLXERPKEGN-UHFFFAOYSA-N 0.000 abstract 1
- 239000004375 Dextrin Substances 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 235000019425 dextrin Nutrition 0.000 abstract 1
- 239000004005 microsphere Substances 0.000 abstract 1
- 239000010450 olivine Substances 0.000 abstract 1
- 229910052609 olivine Inorganic materials 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical group CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- -1 carrier Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006248 expandable polystyrene Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000375 suspending agent Substances 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 235000011182 sodium carbonates Nutrition 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical group [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a full mold casting coating, which consists of the lower components in part by weight: 70-80 parts of quartz powder, 10-15 parts of olivine powder, 10-15 parts of alundum powder, 4-6 parts of sodium bentonite, 1-2 parts of lignosulfonic acid, 2-3 parts of dextrin powder, 0.8-1.5 parts of sodium carboxymethylcellulose, 0.4-0.6 part of sodium benzoate, 1-2 parts of hollow glass microsphere, 7-9 parts of aluminum sulfate, 4-6 parts of polyvinyl alcohol, 5-6 parts of silica sol, 0.5-0.8 part of brown iron oxide, 0.04-0.06 part of n-octyl alcohol and 15-25 parts of water.
Description
Technical field
The present invention relates to casting field, particularly the cavityless casting field.
Background technology
The disperse system that cavityless casting coating is made up of multiple character material different; Its composition mainly comprises compositions such as refractory material, binding agent, carrier, suspending agent and special additive, needs coating that favorable manufacturability ability, service behaviour, quality stability are arranged and applies reappearance.Cavityless casting coating is coated in the outer surface of foamed polystyrene pattern, treats could moulding to pour into a mould after the coating drying.Foamed plastics is airtight, and heat distortion temperature low (about about 70 ℃) is poor to the affinity of water; Liquid residue after foamed plastics melted by heating, the gasification is many, and gas forming amount is big, and these gases and liquid residue are if can not in time discharge, and foundry goods will produce carbon defects such as gas, carburetting, surperficial elephant skin.These characteristics have determined full mold coating should possess the property requirement, and promptly coating should have good wetability and be coated with extension property, good high-temperature crack resistance and elevated temperature strength and good high-temperature gas permeability.
About cavityless casting coating, more existing patent documentations reports, in the prior art, the patent No. is that 03134231.0 Chinese patent discloses a kind of vacuum full mold casting and uses coating, its key material is 320 order zirconium English powder or 320 order silica flours or 320 order graphite; Binding agent is sodium phosphate or waterglass or polyvinyl formal and combination thereof; Solvent is water or ethanol; Wetting agent is an acetone; Blowing agent is a sodium alkyl sulfonate; The coating quality proportioning is: key material 70～80%, and binding agent 4～8%, wetting agent 0.8～1.2%, blowing agent: 1.4～2.0%, all the other are solvent.It is good that this coating has with the foamed plastics wettability, strong adhesion, characteristics such as elevated temperature strength height and good permeability.The patent No. is that 02100867.1 Chinese patent discloses a kind of water-base paint specially for disappearing cast mold, and it is by 700～850 parts of high silica flours, 150～300 parts of diatomite, 20～30 parts of boron-moisten soils; 0.5～2.0 parts of industrial sodium carbonates, 5～15 parts of sodium cellulosates, 30～40 parts of white glue with vinyl, 10～20 parts of aluminum sulfate; 20～30 parts of iron oxide, 20～30 parts of starch, 0.1～0.2 part of washing powder and 700～800 parts of water are formed, and it is good that this coating has wellability; Brushability is good, and it is good to become characteristic and trickling property, and coating is even, good permeability; Intensity is high, and fire resistance is good, and wearability is good, advantage and effect that shelling property is good.But; These two patented technology applicable craft scopes are vacuum full mold castings; The resistance to elevated temperatures of its coating is relatively poor, can only be fit to short finding (in the 200kg) of high-temperature process time and produce, and then can not adapt to for the production of heavy castings (in 20 tons) and small lot handwork.The patent No. is the disclosed a kind of cavityless casting coating of the Chinese patent of 200510071854.X, this coating by aqueous solvent and solid content according to water: solid content is that 0.8～1: 1 mass ratio mixes; Wherein solid content be amorphous graphite, crystalline flake graphite, clay, polyvinyl acetate fat liquor according to 25: 5: 4.5: 6 mass ratio is formed.This coating has the production technology that resistance and high temperature resistance property can be applicable to heavy castings, but its manufacturing cost is higher, and can not be applicable to manual brushing, and this coating is black, is prone to cause the image of working environment black pollution.
Summary of the invention
To the deficiency of prior art, one of the object of the invention is to provide a kind of under high temperature, low temperature environment, all have strong wearability, high tack, good gas permeability and drip-dry cavityless casting coating, makes it can satisfy the heavy castings production requirement.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of cavityless casting coating, this coating is made up of following component in weight portion: silica flour 70-80 part, olive stone flour 10-15 part, schmigel 10-15 part; Sodium bentonite 4-6 part, lignin sulfonic acid 1-2 part, dextrine powder 2-3 part, sodium carboxymethylcellulose 0.8-1.5 part; Sodium Benzoate 0.4-0.6 part, hollow glass micropearl 1-2 part, aluminum sulfate 7-9 part, polyvinyl alcohol 4-6 part; Ludox 5-6 part, brown iron oxide 0.5-0.8 part, n-octyl alcohol 0.04-0.06 part, water 15-25 part.
Wherein, the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
Sodium bentonite wherein prepares for calcium-base bentonite being adopted modification of sodium carbonate.
The present invention has following beneficial effect:
1) on the basis of a large amount of experiments, confirmed that the composition of aggregate, suspending agent, bonding agent and the auxiliary material of coating reaches content separately, make that the effect between the above-mentioned each component reaches collaborative, the combination property of coating is improved.Cavityless casting coating of the present invention had both reached high anti-stick sand ability, the rigidity and the resistance to elevated temperatures of raising apperance, minimized cost again.Optimization allotment through aggregate and various additives forms high current sex change fluid, all reaches better state with foamed polystyrene pattern wetability and brushability.Facts have proved that this coating just can reach the above paint thickness of 1.7mm through 2 times brushings, the anti-stick sand that can satisfy heavy castings requires and carries needs.
2) cavityless casting coating of the present invention has good suspension and thixotropy, also has air permeability and good and higher surface strength, and preparation technology is simple, easy to operate, abundant raw materials, production cost are low.Full mold cast(ing) surface with its production is bright and clean, carbon defects such as no elephant skin; Coating is easy to peel off, and is convenient to cleaning.
Coating of the present invention is suitable for the cavityless casting of large-sized iron casting.
The specific embodiment
Embodiment one
A kind of cavityless casting coating, this coating is made up of following component in weight portion: 70 parts of silica flours, 15 parts of olive stone flours, 10 parts of schmigels, 6 parts of sodium bentonites; 1 part of lignin sulfonic acid, 3 parts of dextrine powders, 0.8 part of sodium carboxymethylcellulose, 0.6 part of Sodium Benzoate; 1 part of hollow glass micropearl, 9 parts in aluminum sulfate, 4 parts of polyvinyl alcohol, 6 parts of Ludox; 0.5 part of brown iron oxide, 0.06 part of n-octyl alcohol, 15 parts in water, the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
Embodiment two
A kind of cavityless casting coating, this coating is made up of following component in weight portion: 80 parts of silica flours, 10 parts of olive stone flours, 15 parts of schmigels, 4 parts of sodium bentonites; 2 parts of lignin sulfonic acids, 2 parts of dextrine powders, 1.5 parts of sodium carboxymethylcelluloses, 0.4 part of Sodium Benzoate; 2 parts of hollow glass micropearls, 7 parts in aluminum sulfate, 6 parts of polyvinyl alcohol, 5 parts of Ludox; 0.8 part of brown iron oxide, 0.04 part of n-octyl alcohol, 25 parts in water, the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
Embodiment three
A kind of cavityless casting coating, this coating is made up of following component in weight portion: 75 parts of silica flours, 13 parts of olive stone flours, 13 parts of schmigels, 5 parts of sodium bentonites; 1.5 parts of lignin sulfonic acids, 2.5 parts of dextrine powders, 1.2 parts of sodium carboxymethylcelluloses, 0.5 part of Sodium Benzoate; 1.5 parts of hollow glass micropearls, 8 parts in 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, 20 parts in water, the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
Applicant's statement; The present invention explains detailed process equipment of the present invention and technological process through the foregoing description; But the present invention is not limited to above-mentioned detailed process equipment and technological process, does not mean that promptly the present invention must rely on above-mentioned detailed process equipment and technological process could be implemented.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and auxiliary element, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (4)
1. a cavityless casting coating is characterized in that, this coating is made up of following component in weight portion: silica flour 70-80 part, olive stone flour 10-15 part, schmigel 10-15 part; Sodium bentonite 4-6 part, lignin sulfonic acid 1-2 part, dextrine powder 2-3 part, sodium carboxymethylcellulose 0.8-1.5 part; Sodium Benzoate 0.4-0.6 part, hollow glass micropearl 1-2 part, aluminum sulfate 7-9 part, polyvinyl alcohol 4-6 part; Ludox 5-6 part, brown iron oxide 0.5-0.8 part, n-octyl alcohol 0.04-0.06 part, water 15-25 part.
2. a kind of cavityless casting coating as claimed in claim 1 is characterized in that the granularity of described silica flour, olive stone flour and schmigel is the 200-320 order.
3. a kind of cavityless casting coating as claimed in claim 2 is characterized in that, sodium bentonite wherein prepares for calcium-base bentonite being adopted modification of sodium carbonate.
4. like claim 2 or 3 described a kind of cavityless casting coating, it is characterized in that this coating is made up of following component in weight portion: 75 parts of silica flours, 13 parts of olive stone flours, 13 parts of schmigels; 5 parts of sodium bentonites, 1.5 parts of lignin sulfonic acids, 2.5 parts of dextrine powders, 1.2 parts of sodium carboxymethylcelluloses; 0.5 part of Sodium Benzoate, 1.5 parts of hollow glass micropearls, 8 parts in 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, 20 parts in water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110392541 CN102397983B (en) | 2011-11-29 | 2011-11-29 | Full mold casing coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110392541 CN102397983B (en) | 2011-11-29 | 2011-11-29 | Full mold casing coating |
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| Publication Number | Publication Date |
|---|---|
| CN102397983A true CN102397983A (en) | 2012-04-04 |
| CN102397983B CN102397983B (en) | 2013-03-20 |
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| CN 201110392541 Active CN102397983B (en) | 2011-11-29 | 2011-11-29 | Full mold casing coating |
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