CN85100565A - Water-based self-drying polyvinyl alcohol coatings for casting - Google Patents
Water-based self-drying polyvinyl alcohol coatings for casting Download PDFInfo
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- CN85100565A CN85100565A CN 85100565 CN85100565A CN85100565A CN 85100565 A CN85100565 A CN 85100565A CN 85100565 CN85100565 CN 85100565 CN 85100565 A CN85100565 A CN 85100565A CN 85100565 A CN85100565 A CN 85100565A
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Abstract
The present invention is foundary industry sand mold and core cover, it is characterized in that the binding agent polyvinyl alcohol 17-88 aqueous solution, suspending agent adds activating powder with roasting oxidation magnesium powder and adds activated bentonite and add carboxymethyl cellulose aqueous solution, is mixed with various refractory aggregates and does not dry by the fire from doing, and is difficult for precipitation, the coating surface strength height, do not give birth to crackle, be difficult for the water-based self-drying coating of moisture absorption, be applicable to alloy steel casting, cast carbon steel, iron castings and non-ferrous alloy casting.
Description
The invention belongs to foundary industry sand mold and core cover technical field.
At present used casting water based paint syrup commonly used, carboxymethyl cellulose and bentonite are as binding agent, and as suspending agent, coating needs baking with bentonite, easy precipitation, and sediment is closely knit, and coating surface strength is low.Dry the back and easily give birth to crackle, moisture absorption easily, it is many to absorb water during the core dip-coating, usually caves in.According to the water soluble paint of Japan " casting is forged and heat treatment " nineteen eighty-two NO7p 18-24 and Japan's " casting thing " NO4p 176-180 report in 1981, all be as binding agent with carboxymethyl cellulose.
The objective of the invention is at above-mentioned shortcoming, propose a kind of the need through overbaking (energy savings), be difficult for precipitation, refractory aggregate is fluffy accumulation, and makes the strength of coating height, does not give birth to crackle, is difficult for moisture absorption, water-based self-drying coating that can dip-coating.
Content of the present invention is a kind of water-based self-drying polyvinyl alcohol coatings for casting, the polyvinyl alcohol 17-88 aqueous solution with 2-5% concentration is made binding agent, adds the carboxymethyl cellulose aqueous solution that activated bentonite adds 3-6.5% concentration with the magnesia powder of 950-1100 ℃ of roasting and makes suspending agent.Because the impervious of the polyvinyl alcohol 17-88 aqueous solution, suction is lacked during the core dip-coating paint, and coating is air-dry rapidly, because the demagnetization of roasting oxidation magnesium powder makes aggregate be fluffy accumulation, is difficult for precipitation; Because the polyvinyl alcohol 17-88 aqueous solution makes the coating top layer form one deck plastic foil as thin as a wafer after doing, and makes coating surface intensity height, and is incrust, do not give birth to crackle, is difficult for moisture absorption.
The composition of water-based self-drying polyvinyl alcohol coatings (weight %) is: refractory aggregate (zirconium English powder or schmigel or magnesia powder or chromite powder or silica flour or graphite powder or talcum powder) 81.5-94.45%; Polyvinyl alcohol 17-88 is the aqueous solution that 2-10%(is made into 2-5% concentration); 950-1100 ℃ of roasting oxidation magnesium powder 2-5%; Activated bentonite 1.5-3%; Carboxymethyl cellulose 0.05-0.5%(is made into the aqueous solution of 3-6.5% concentration); Water is an amount of.
Selecting for use of the refractory aggregate of above-mentioned 81.5-94.45%, alloy steel casting usefulness, schmigel or use with zirconium English powder cast carbon steel.Magnesia powder or schmigel or chromite powder iron castings are used; Graphite powder or with talcum powder non-ferrous casting usefulness, talcum powder
The preparing process of water-based self-drying polyvinyl alcohol coatings: 1. first group,, add suitable quantity of water then and mix with mixed rolling machine and make paste with refractory aggregate activated bentonite and roasting oxidation magnesium powder mixing; 2, the second groups, with the carboxymethyl cellulose aqueous solution of the polyvinyl alcohol 17-88 aqueous solution of 2-5% concentration and 3-6.6% concentration in advance mixing add the suitable quantity of water mixing again; 3, above-mentioned two components are evenly mixed, the mixed vane type mould wash mixer of using 30-40 rev/min.
Characteristics of the present invention are: 1, need not toast, and 2, be difficult for precipitation, 3, aggregate is fluffy accumulation, stirs leicht fallen D/A, and 4, do back coating surface strength height certainly, do not give birth to crackle, be difficult for moisture absorption, 5, core dip-coating coating of the present invention, suction is few, does not cave in.
Embodiment of the present invention 1, constituent (weight %): graphite powder 72-81.1%; Talcum powder 5-10%; Activated bentonite 1.5-2.5%; 950-1100 ℃ of roasting oxidation magnesium powder 4-5%; Polyvinyl alcohol 17-88 is the aqueous solution that 8-10%(is made into 4-5% concentration); Carboxymethyl cellulose 0.4-0.5%(is made into the aqueous solution of 5-6% concentration); Water 300-400%.2, preparing process: (1) first component: with graphite powder, talcum powder, activated bentonite and roasting oxidation magnesium powder mixing, add 70-80% water then, mix and make paste; (2) second components with the polyvinyl alcohol 17-88 aqueous solution of the carboxymethyl cellulose aqueous solution of 5-6% concentration and 4-5% concentration mixing in advance, add water 230-320% mixing again; (3) above-mentioned two components are evenly mixed.
3, correction data: with this programme dip-coating 5.5QS60-20 submersible pump impeller and conductor shell core, the foundry goods of casting is bright and clean, the pore-free defective.
Claims (4)
1, a kind of water-based self-drying polyvinyl alcohol coatings for casting, form the polyvinyl alcohol 17-88 aqueous solution that it is characterized in that binding agent usefulness 2-5% concentration by refractory aggregate, liquid carrier (water), binding agent and suspending agent, suspending agent adds the carboxymethyl cellulose aqueous solution that activated bentonite adds 3-6.5% concentration with 950-1100 ℃ of roasting oxidation magnesium powder.
2, according to the described water-based self-drying coating of claim 1, the constituent (weight %) that it is characterized in that coating is that refractory aggregate (zirconium English powder or schmigel or magnesia powder or chromite powder or silica flour or graphite powder or talcum powder) 81.5-94.45% binding agent is the aqueous solution that 2-10%(is made into 2-5% concentration with polyvinyl alcohol 17-88), suspending agent adds activated bentonite 1.5-3% with 950-1100 ℃ of roasting oxidation magnesium powder 2-5% and adds the aqueous solution that carboxymethyl cellulose 0.05-0.5%(is made into 3-6.5% concentration), water is an amount of.
3,, it is characterized in that its preparing process is (1) first group, with refractory aggregate, activated bentonite and roasting oxidation magnesium powder mixing according to claim 1 or 2 described water-based self-drying polyvinyl alcohol coatings for casting.Add the mixed paste of making of suitable quantity of water then; (2) second components with the polyvinyl alcohol water solution of 2-5% concentration and the carboxymethyl cellulose aqueous solution mixing of 3-6.5% concentration, add the suitable quantity of water mixing again; (3) above-mentioned two components are evenly mixed.
4, according to claim 3, wherein said preparing process is characterized in that mixing system first component with mixing the rolling machine, mixes first and second component with 30-40 rev/min vane type mould wash mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100565A CN85100565B (en) | 1985-04-01 | 1985-04-01 | Water-based self-drying polyvinyl alcohol coatings for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100565A CN85100565B (en) | 1985-04-01 | 1985-04-01 | Water-based self-drying polyvinyl alcohol coatings for casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100565A true CN85100565A (en) | 1986-06-10 |
| CN85100565B CN85100565B (en) | 1988-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85100565A Expired CN85100565B (en) | 1985-04-01 | 1985-04-01 | Water-based self-drying polyvinyl alcohol coatings for casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85100565B (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100377811C (en) * | 2006-08-25 | 2008-04-02 | 蒋文兰 | Alcohoh base casting coating material powder for concave convex rod |
| CN101338089B (en) * | 2008-08-13 | 2010-06-09 | 徐瑶 | Emulation coating of die-casting magnalium and method for preparing same |
| CN101941048A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Graphite paste coating |
| CN101941049A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Quartz powder repair paste |
| CN101941050A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Heat-resistant graphite paste paint |
| CN102070349A (en) * | 2010-09-03 | 2011-05-25 | 吴江市液铸液压件铸造有限公司 | Repair paint of moulding wind-shielding ring for foundry furnace |
| CN102421311A (en) * | 2009-04-16 | 2012-04-18 | 赛拉尼斯国际合作公司 | Fire retardant fabric and/or apparel |
| CN102491785A (en) * | 2011-12-06 | 2012-06-13 | 辽宁速航特铸材料有限公司 | Method for improving property of ceramic core through high-temperature inorganic coating |
| CN102836954A (en) * | 2012-08-31 | 2012-12-26 | 太仓科博尔精密铸业有限公司 | Lost foam coating and preparation method thereof |
| CN103223458A (en) * | 2013-04-26 | 2013-07-31 | 湖北工业大学 | Water-based self-drying casting paint, and preparation method and application method |
| CN103755365A (en) * | 2013-12-31 | 2014-04-30 | 焦作市圣昊铝业有限公司 | Flow-edge flow table coating powder |
| CN103878302A (en) * | 2014-03-03 | 2014-06-25 | 珠海市斗门福联造型材料实业有限公司 | Water-based self-drying/quick-drying sand type casting coating and preparation method thereof |
| CN105176159A (en) * | 2015-10-21 | 2015-12-23 | 苏州赛斯德工程设备有限公司 | High-strength water-based coating for nonmetal surface and preparation method thereof |
| CN105170887A (en) * | 2015-09-07 | 2015-12-23 | 王璐 | Coating for mechanically-processed casting |
| CN105945215A (en) * | 2016-07-06 | 2016-09-21 | 上海华培动力科技有限公司 | Double-layer refractory coating used for centrifugal casting process metal die and spraying process thereof |
| CN105964929A (en) * | 2016-02-18 | 2016-09-28 | 蚌埠市鸿安精密机械有限公司 | High-strength anti-cracking water-soluble mold core used for aluminum casting and preparation method thereof |
-
1985
- 1985-04-01 CN CN85100565A patent/CN85100565B/en not_active Expired
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100377811C (en) * | 2006-08-25 | 2008-04-02 | 蒋文兰 | Alcohoh base casting coating material powder for concave convex rod |
| CN101338089B (en) * | 2008-08-13 | 2010-06-09 | 徐瑶 | Emulation coating of die-casting magnalium and method for preparing same |
| CN102421311B (en) * | 2009-04-16 | 2015-09-09 | 赛拉尼斯国际合作公司 | Flame-retardant textile and/or clothes |
| CN102421311A (en) * | 2009-04-16 | 2012-04-18 | 赛拉尼斯国际合作公司 | Fire retardant fabric and/or apparel |
| CN102070349A (en) * | 2010-09-03 | 2011-05-25 | 吴江市液铸液压件铸造有限公司 | Repair paint of moulding wind-shielding ring for foundry furnace |
| CN101941049A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Quartz powder repair paste |
| CN101941048B (en) * | 2010-09-03 | 2012-07-04 | 吴江市液铸液压件铸造有限公司 | Graphite paste coating |
| CN101941050A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Heat-resistant graphite paste paint |
| CN101941048A (en) * | 2010-09-03 | 2011-01-12 | 吴江市液铸液压件铸造有限公司 | Graphite paste coating |
| CN102491785A (en) * | 2011-12-06 | 2012-06-13 | 辽宁速航特铸材料有限公司 | Method for improving property of ceramic core through high-temperature inorganic coating |
| CN102491785B (en) * | 2011-12-06 | 2013-02-27 | 辽宁速航特铸材料有限公司 | Method for improving property of ceramic core through high-temperature inorganic coating |
| CN102836954A (en) * | 2012-08-31 | 2012-12-26 | 太仓科博尔精密铸业有限公司 | Lost foam coating and preparation method thereof |
| CN102836954B (en) * | 2012-08-31 | 2014-07-16 | 太仓科博尔精密铸业有限公司 | Lost foam coating and preparation method thereof |
| CN103223458A (en) * | 2013-04-26 | 2013-07-31 | 湖北工业大学 | Water-based self-drying casting paint, and preparation method and application method |
| CN103755365B (en) * | 2013-12-31 | 2016-06-01 | 焦作市圣昊铝业有限公司 | A kind of stream limit stream dish coating powder |
| CN103755365A (en) * | 2013-12-31 | 2014-04-30 | 焦作市圣昊铝业有限公司 | Flow-edge flow table coating powder |
| CN103878302A (en) * | 2014-03-03 | 2014-06-25 | 珠海市斗门福联造型材料实业有限公司 | Water-based self-drying/quick-drying sand type casting coating and preparation method thereof |
| CN103878302B (en) * | 2014-03-03 | 2016-01-20 | 珠海市斗门福联造型材料实业有限公司 | A kind of water-based self-drying/quick-drying sand casting coating and preparation method thereof |
| CN105170887A (en) * | 2015-09-07 | 2015-12-23 | 王璐 | Coating for mechanically-processed casting |
| CN105176159A (en) * | 2015-10-21 | 2015-12-23 | 苏州赛斯德工程设备有限公司 | High-strength water-based coating for nonmetal surface and preparation method thereof |
| CN105964929A (en) * | 2016-02-18 | 2016-09-28 | 蚌埠市鸿安精密机械有限公司 | High-strength anti-cracking water-soluble mold core used for aluminum casting and preparation method thereof |
| CN105945215A (en) * | 2016-07-06 | 2016-09-21 | 上海华培动力科技有限公司 | Double-layer refractory coating used for centrifugal casting process metal die and spraying process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85100565B (en) | 1988-08-24 |
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