CN103100649A - Method for preparing high-adhesiveness solid-mold casting coating material - Google Patents
Method for preparing high-adhesiveness solid-mold casting coating material Download PDFInfo
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- CN103100649A CN103100649A CN2012105307483A CN201210530748A CN103100649A CN 103100649 A CN103100649 A CN 103100649A CN 2012105307483 A CN2012105307483 A CN 2012105307483A CN 201210530748 A CN201210530748 A CN 201210530748A CN 103100649 A CN103100649 A CN 103100649A
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Abstract
The invention discloses a method for preparing a high-adhesiveness solid-mold casting coating material. According to the method, the high-adhesiveness solid-mold casting coating material is prepared from the following ingredients in parts by weight: 65-75 parts of bauxite chamotte, 5-7 parts of meerschaum powder, 10-12 parts of corundum powder, 10-12 parts of water glass, 4-6 parts of water glass, 1-2 parts of lignosulfonic acid, 0.8-1.5 parts of sodium carboxymethyl cellulose, 5-7 parts of starch paste, 0.4-0.6 part of sodium benzoate, 1-2 parts of nanoscale ceramic powder, 0.5-0.8 part of red ferric oxide powder, 2-3 parts of olivine powder, 2-3 parts of hollow glass beads and 25-35 parts of water. The solid-mold casting coating material prepared by the method has strong wear resistance, high adhesiveness and excellent gas permeability and quick-drying performance in both a high-temperature environment and a low-temperature environment, thereby meeting the production requirements of large-sized cast parts.
Description
Technical field
The present invention relates to casting field, particularly a kind of preparation method of high tack full-mold casting coating.
Background technology
The disperse system that full-mold casting coating is comprised of the material of multiple different in kind, its composition mainly comprises the compositions such as refractory material, binding agent, carrier, waterglass and special additive, needs coating good processing performance, service behaviour, quality stability are arranged and apply reappearance.Full-mold casting coating is coated in the outer surface of foamed polystyrene pattern, could the moulding cast after the coating drying.Foamed plastics is airtight, and heat distortion temperature low (approximately 70 ℃ of left and right) is poor to the affinity of water; Liquid residue after foamed plastics melted by heating, gasification is many, and gas forming amount is large, if these gases and liquid residue can not in time be discharged, foundry goods will produce the carbon defects such as gas, carburetting, Surface Wrinkle in iron.These characteristics have determined that full-mold paint should possess following performance requirement, and namely coating should have good wetability and being coated with property, good high-temperature resistant property and elevated temperature strength and good hot permeability.
The resistance to elevated temperatures of the cast paint of prior art is relatively poor, can only be fit to shorter finding of high-temperature process time (in 200kg) and produce, and can not adapt to for the production of heavy castings (in 20 tons) and small lot handwork.Have the production technology that resistant to elevated temperatures performance can be applicable to heavy castings, but its manufacturing cost is higher, and can not be applicable to manual brushing, this coating is black, easily causes the image of working environment black pollution.
Summary of the invention
For the deficiencies in the prior art, the preparation method who the purpose of this invention is to provide a kind of high tack full-mold casting coating, all have strong wearability, high tack, good gas permeability and drip-dry full-mold casting coating under high temperature, low temperature environment, can satisfy the heavy castings production requirement.
Technical scheme of the present invention is as follows:
A kind of preparation method of high tack full-mold casting coating, formed by following component in weight portion: bauxite chamotte 65-75 part, sepiolite powder 5-7 part, schmigel 10-12 part, waterglass 10-12 part, waterglass 4-6 part, lignin sulfonic acid 1-2 part, sodium carboxymethylcellulose 0.8-1.5 part, starch paste 5-7 part, Sodium Benzoate 0.4-0.6 part, nanometer scale ceramics powder 1-2 part, ferric oxide red powder 0.5-0.8 part, olive stone flour 2-3 part, hollow glass micropearl 2-3 part, water 55-65 part, described preparation method comprises the steps:
1) sepiolite powder was soaked 3-4 hour with 10-15% sulfuric acid, deionized water is washed, then soaks 3-4 hour with the 10-12% sodium hydroxide solution, then washs to neutral with deionized water, then calcines 2-3 hour under 500-530 ℃, is ground into the modified meerschaum powder;
2) the modified meerschaum powder that above-mentioned steps is obtained mixes with waterglass, 1/3 weight parts water, stir and be heated to 150-160 ℃, be incubated 1-2 hour, stove is chilled to 50 ℃, be incubated 2 hours, then be heated to 100-120 ℃, be incubated 1 hour, be cooled to normal temperature with 20 ℃/hour, namely make modified meerschaum powder and waterglass water mixed liquid;
3) schmigel, trees ashes, nanometer scale ceramics powder, starch paste, the sodium carboxymethylcellulose with above-mentioned weight portion mixes with 1/4 weight parts water, and fully stirs, and then standing 40-60min, then slowly be heated to 75-85 ℃ and fully stirring;
4) with step 2) product, step 3) product, bauxite chamotte, ferric oxide red powder, olive stone flour, hollow glass micropearl, residuals weight part water add in reactor, open reactor, mixing speed is: 100-120r/min, add other raw material in stirring downhill reaction still, the temperature that heats simultaneously reactor slowly rises to 75-85 ℃, constant temperature stirs 14-18min, grinds, gets final product.
Compared with prior art, the present invention has following beneficial effect:
1) on the basis of great many of experiments, determined composition and separately the content of aggregate, waterglass, bonding agent and the auxiliary material of coating, make the effect between above-mentioned each component reach collaborative, the combination property of coating is improved.Full-mold casting coating of the present invention had both reached high anti-stick sand ability, 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, this coating just can reach the above paint thickness of 1.7mm through 2 times brushings, and the anti-stick sand that can satisfy heavy castings requires and carry needs.
2) full-mold casting coating of the present invention has good suspension and thixotropy, also has good gas permeability 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, without carbon defects such as elephant skin; Coating is easy to peel off, and is convenient to cleaning.
The specific embodiment
A kind of preparation method of high tack full-mold casting coating is comprised of following component in weight portion (kilogram): 65 parts of bauxite chamottes, 7 parts of sepiolite powders, 12 parts of schmigels, 12 parts of waterglass, 4 parts, trees ashes, 2 parts of lignin sulfonic acids, 0.8 part of sodium carboxymethylcellulose, 5 parts of starch pastes, 0.4 part of Sodium Benzoate, 2 parts, nanometer scale ceramics powder, 0.8 part of ferric oxide red powder, 3 parts of olive stone flours, 2 parts of hollow glass micropearls, 55 parts, water, the preparation method comprises the steps:
1) sepiolite powder was soaked 3-4 hour with 10-15% sulfuric acid, deionized water is washed, then soaks 3-4 hour with the 10-12% sodium hydroxide solution, then washs to neutral with deionized water, then calcines 2-3 hour under 500-530 ℃, is ground into the modified meerschaum powder;
2) the modified meerschaum powder that above-mentioned steps is obtained mixes with the water of waterglass, 1/3 weight, stir and be heated to 150-160 ℃, be incubated 1-2 hour, stove is chilled to 50 ℃, be incubated 2 hours, then be heated to 100-120 ℃, be incubated 1 hour, be cooled to normal temperature with 20 ℃/hour, namely make modified meerschaum powder and waterglass water mixed liquid;
3) schmigel, trees ashes, nanometer scale ceramics powder, starch paste, the sodium carboxymethylcellulose with above-mentioned weight portion mixes with the water of 1/4 weight, and fully stirs, and then standing 40-60min, then slowly be heated to 75-85 ℃ and fully stirring;
4) with step 2) water of product, step 3) product, bauxite chamotte, ferric oxide red powder, olive stone flour, hollow glass micropearl, residuals weight adds in reactor, open reactor, mixing speed is: 100-120r/min, add other raw material in stirring downhill reaction still, the temperature that heats simultaneously reactor slowly rises to 75-85 ℃, constant temperature stirs 14-18min, grinds, gets final product.
Utilize the suspensibility of coating placement after 72 hours of method preparation of the present invention greater than 92%; The shear stress of coating is limited to 18-21Pa; Be 41-43s with the apparent viscosity value that is coated with 4 viscometer determining coating, thixotroping rate 16-18%, the brushing index of coating, an amount of dropping down and a time of dropping down are respectively 5.5,0.6g and 9s.The normal temperature strength of coating is higher than 680g/mm.Through the intensity of paint coatings after 1200 ℃ of roastings higher than 490g/mm.The normal temperature gas permeability of coating is higher than 12cm
2(kPamin)
-1, hot permeability is greater than 22cm
2(kPamin)
-1
Claims (1)
1. the preparation method of a high tack full-mold casting coating, it is characterized in that, formed by following component in weight portion: bauxite chamotte 65-75 part, sepiolite powder 5-7 part, schmigel 10-12 part, waterglass 10-12 part, trees ashes 4-6 part, lignin sulfonic acid 1-2 part, sodium carboxymethylcellulose 0.8-1.5 part, starch paste 5-7 part, Sodium Benzoate 0.4-0.6 part, nanometer scale ceramics powder 1-2 part, ferric oxide red powder 0.5-0.8 part, olive stone flour 2-3 part, hollow glass micropearl 2-3 part, water 55-65 part, described preparation method comprises the steps:
1) sepiolite powder was soaked 3-4 hour with 10-15% sulfuric acid, deionized water is washed, then soaks 3-4 hour with the 10-12% sodium hydroxide solution, then washs to neutral with deionized water, then calcines 2-3 hour under 500-530 ℃, is ground into the modified meerschaum powder;
2) the modified meerschaum powder that above-mentioned steps is obtained mixes with the water of waterglass, 1/3 weight, stir and be heated to 150-160 ℃, be incubated 1-2 hour, stove is chilled to 50 ℃, be incubated 2 hours, then be heated to 100-120 ℃, be incubated 1 hour, be cooled to normal temperature with 20 ℃/hour, namely make modified meerschaum powder and waterglass water mixed liquid;
3) schmigel, trees ashes, nanometer scale ceramics powder, starch paste, the sodium carboxymethylcellulose with above-mentioned weight portion mixes with the water of 1/4 weight, and fully stirs, and then standing 40-60min, then slowly be heated to 75-85 ℃ and fully stirring;
4) with step 2) water of product, step 3) product, bauxite chamotte, ferric oxide red powder, olive stone flour hollow glass micropearl, residuals weight adds in reactor, open reactor, mixing speed is: 100-120r/min, add other raw material in stirring downhill reaction still, the temperature that heats simultaneously reactor slowly rises to 75-85 ℃, constant temperature stirs 14-18min, grinds, gets final product.
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| CN201210530748.3A CN103100649B (en) | 2012-12-11 | 2012-12-11 | A kind of preparation method of high tack full-mold casting coating |
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| CN201210530748.3A CN103100649B (en) | 2012-12-11 | 2012-12-11 | A kind of preparation method of high tack full-mold casting coating |
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| CN103100649A true CN103100649A (en) | 2013-05-15 |
| CN103100649B CN103100649B (en) | 2016-05-18 |
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Cited By (15)
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| CN104084529A (en) * | 2014-06-16 | 2014-10-08 | 芜湖市鸿坤汽车零部件有限公司 | Modified steel slag alcohol-based casting coating and making method thereof |
| CN104326719A (en) * | 2014-10-07 | 2015-02-04 | 合肥向荣环保科技有限公司 | External wall thermal-insulating coating being good in water-retaining performance |
| CN104399870A (en) * | 2014-11-08 | 2015-03-11 | 芜湖市鸿坤汽车零部件有限公司 | Novel alcohol-based casting paint containing tree ash and manufacturing method thereof |
| CN104439049A (en) * | 2014-12-31 | 2015-03-25 | 天津宁康科技有限公司 | Environment-friendly alcohol group ceramic casting coating |
| CN104475664A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Building gypsum/attapulgite composite casting coating and manufacturing method thereof |
| CN104475666A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | High temperature resistant environmentally-friendly casting coating and manufacturing method thereof |
| CN104475668A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Cristobalite/graphite composite casting coating and manufacturing method thereof |
| CN104475667A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Zircon coating and manufacturing method thereof |
| CN104475670A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Modified municipal sludge casting coating and manufacturing method thereof |
| CN105328114A (en) * | 2015-11-02 | 2016-02-17 | 广西博白县三田机械制造有限公司 | Fire-proof coating used for die casting |
| CN105907235A (en) * | 2016-05-06 | 2016-08-31 | 铜陵瑞莱科技有限公司 | Flame-retardant iron oxide red anticorrosive paint and manufacturing method thereof |
| CN107262667A (en) * | 2017-07-03 | 2017-10-20 | 李吕军 | Wear-resisting coating agent for model casting casting and preparation method thereof |
| CN107335776A (en) * | 2017-06-23 | 2017-11-10 | 安徽绿环泵业有限公司 | A kind of mold cavity surface coating for being used to cast impeller of pump |
| CN107971456A (en) * | 2018-01-17 | 2018-05-01 | 重庆卡森科技有限公司 | A kind of multi-functional cast paint |
| CN112341868A (en) * | 2020-11-27 | 2021-02-09 | 安徽华飞机械铸锻有限公司 | Preparation method of starch-based lost foam coating |
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Cited By (16)
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| CN104084529A (en) * | 2014-06-16 | 2014-10-08 | 芜湖市鸿坤汽车零部件有限公司 | Modified steel slag alcohol-based casting coating and making method thereof |
| CN104326719A (en) * | 2014-10-07 | 2015-02-04 | 合肥向荣环保科技有限公司 | External wall thermal-insulating coating being good in water-retaining performance |
| CN104326719B (en) * | 2014-10-07 | 2016-08-24 | 唐世群 | Good water-retaining property exterior wall heat-insulating paint |
| CN104475670A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Modified municipal sludge casting coating and manufacturing method thereof |
| CN104475664A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Building gypsum/attapulgite composite casting coating and manufacturing method thereof |
| CN104475666A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | High temperature resistant environmentally-friendly casting coating and manufacturing method thereof |
| CN104475668A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Cristobalite/graphite composite casting coating and manufacturing method thereof |
| CN104475667A (en) * | 2014-10-08 | 2015-04-01 | 铜陵瑞莱科技有限公司 | Zircon coating and manufacturing method thereof |
| CN104399870A (en) * | 2014-11-08 | 2015-03-11 | 芜湖市鸿坤汽车零部件有限公司 | Novel alcohol-based casting paint containing tree ash and manufacturing method thereof |
| CN104439049A (en) * | 2014-12-31 | 2015-03-25 | 天津宁康科技有限公司 | Environment-friendly alcohol group ceramic casting coating |
| CN105328114A (en) * | 2015-11-02 | 2016-02-17 | 广西博白县三田机械制造有限公司 | Fire-proof coating used for die casting |
| CN105907235A (en) * | 2016-05-06 | 2016-08-31 | 铜陵瑞莱科技有限公司 | Flame-retardant iron oxide red anticorrosive paint and manufacturing method thereof |
| CN107335776A (en) * | 2017-06-23 | 2017-11-10 | 安徽绿环泵业有限公司 | A kind of mold cavity surface coating for being used to cast impeller of pump |
| CN107262667A (en) * | 2017-07-03 | 2017-10-20 | 李吕军 | Wear-resisting coating agent for model casting casting and preparation method thereof |
| CN107971456A (en) * | 2018-01-17 | 2018-05-01 | 重庆卡森科技有限公司 | A kind of multi-functional cast paint |
| CN112341868A (en) * | 2020-11-27 | 2021-02-09 | 安徽华飞机械铸锻有限公司 | Preparation method of starch-based lost foam coating |
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