CN102284676A - Coating for metal mold casting - Google Patents
Coating for metal mold casting Download PDFInfo
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- CN102284676A CN102284676A CN2011102773848A CN201110277384A CN102284676A CN 102284676 A CN102284676 A CN 102284676A CN 2011102773848 A CN2011102773848 A CN 2011102773848A CN 201110277384 A CN201110277384 A CN 201110277384A CN 102284676 A CN102284676 A CN 102284676A
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Abstract
The invention discloses coating for metal mold casting, which comprises the following components by weight portions: 10-12 portions of quartz powder of 200-320 meshes, 18-25 portions of fused magnesia of 150-240 meshes, 2-3 portions of zirconium acetate solution of 30-40 percent, 1-2 portion(s) of sodium carboxymethyl fiber, 0.5-1 portion of sodium alkylbenzene sulfonate, 0.5-1 portion of bentonite, 1 portion of butanol, 0.2-0.5 portion of surfactant JFC (fatty alcohol-polyoxyethylene ether) and 10-23 portions of water.
Description
Technical field
The present invention relates to casting field, particularly the permanent mold casting field.
Background technology
When technologies such as utilizing gravity-assist pouring, low-pressure casting, pressure reduction cast is cast with non-ferrous metal, use metal mold usually, this moment need be at metal mold external coating coating.The kind of metal mold coating is a lot, mainly distinguishes according to paint adhesion agent and resistant to elevated temperatures inserts.Binding agent commonly used has syrup, waterglass, high polymer binders such as also useful resin, polyvinyl alcohol.Resistant to elevated temperatures inserts is black lead powder, spraying carbon black, coke powder, high-alumina fly etc.Syrup coating composition commonly used is: black lead powder＞30%, spraying carbon black＞45%, syrup＞15%.After these materials mixing, be placed in the gyratory shaker, add suitable quantity of water, fully stirred 1.5-2 hour.Coating density requires at 1.2-1.3g/cm
3Between.Sodium silicate binder paint ingredient commonly used is: carbon black 80%, waterglass 20% and an amount of moisture, density 1.1-1.2g/cm
3Polyvinyl alcohol adhesive paint ingredient commonly used is: high-alumina fly that 200 orders are above and 300-400g polyvinyl alcohol and an amount of moisture system of mixing form.When being the metal mold repeated use, the advantage of using syrup to make binding agent clears up easily.Shortcoming is that syrup is to make with grain, and the temperature to metal mold has certain requirement when using, and mold temperature too prepared paint is not coated with, and the moisture in the coating is not volatile, causes gas hole defect easily; Mold temperature is too high; syrup is burnt easily; make coating lose adhesive property; molten metal washes out dope layer easily during cast; metal mold is lost protective effect; make cast(ing) surface be prone to many tiny pin holes, also can produce the phenomenon that metal mold and foundry goods molten metal adhere to each other sometimes, cause scrapping of foundry goods and casting mold when serious.The advantage of waterglass coating is that dry strength is big, and the metal mold temperature undergoes no deterioration when high and burns.Shortcoming is to use back cleaning difficulty.Paint thickness can not be coated with thick, only can reach 0.3-0.5mm, otherwise easy to crack peeling off, so casting mold is shorter service life.The polyvinyl alcohol coating advantage is that dry strength is big, can with multiple high temperature resistant filler mixed preparing, paint thickness can thicken to 2-5mm, can produce carbonization light film under the molten metal high temperature action, makes cast(ing) surface bright and clean.Shortcoming is that the mixed system time is long, will ceaselessly stir during spraying, and to prevent the coating layering and precipitating, the difficult control of coating layer thickness evenly.
Chinese invention patent CN101116894 discloses a kind of method for preparing metal type casting coating material, attapulgite clay 0.3% is mixed 10 parts of water milling 2 hours in colloid mill, make first liquid, again talcum powder 6%, diatomite 2%, sodium alkyl sulfonate 0.2% and boric acid 3% are put into colloid mill, added first liquid, waterglass 3% and water 85.5% milling respectively 2 hours, get final product metal-type casting coating.This invention has stronger heat insulating ability, anti-flammability, caking property and coating, has good suspension, is difficult for precipitation in the use, helps reducing the hot cracking tendency of foundry goods.But there is coating preparation trouble in this invention, and dope layer is low easy to crack and peel off and wait deficiency because of intensity.Chinese invention patent CN1966180 also discloses a kind of heavy castings coating and manufacture method thereof, this coating is the alcohol zircon flour cast paint, and composition has zirconium English powder 62～75%, lithium bentonite 1～3%, deionized water 1～3%, modification Magnesiumaluminumsilicate 1～3%, nanoscale clay 0.15～0.8%, alundum (Al 0.02～0.08%, water-soluble polyester resin 0.2～1.2%, polyvinyl butyral resin (PVB) 0.1～0.8%, rosin 0.6～3%, industrial alcohol 15～25%, isopropyl alcohol 1～5%, heavy aromatic solvent oil 150
#1～5%.It is good that this invention coating has fire resistance, and anti-stick sand ability is strong, and characteristics such as suspension, brushability, levelability excellence are suitable for heavy castings production, but this coating complicated process of preparation, the cost height uses troublesome poeration.
Summary of the invention
At the deficiencies in the prior art, one of purpose of the present invention is to provide a kind of permanent mold casting coating, and this coating and casting mold tack are good, intensity is high, easy to use, the easy demoulding of foundry goods and cost are low.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of permanent mold casting coating, this coating is made up of the following component in weight portion: 10-12 part 200-320 purpose silica flour, 18-25 part 150-240 purpose fused magnesite, the zirconium acetate solution of 2-3 part 30-40%, 1-2 part carboxymethyl cellulose acid sodium, 0.5-1 part sodium alkyl benzene sulfonate, 0.5-1 part bentonite, 1 part of n-butanol, 0.2-0.5 part surfactant JFC and 10-23 part water.
The preparation method of above-mentioned coating comprises the steps:
1) silica flour and fused magnesite are placed in the coating grinding equipment, add 5-8 part water then, base-material is moistening and stir;
2) with the zirconium acetate solution of 30-40%, carboxymethyl cellulose acid sodium and n-butanol join in the above-mentioned aggregate and stirred 10-15 minute;
3) sodium alkyl benzene sulfonate, bentonite, surfactant JFC and 10-15 part water are added in the coating grinding equipment successively, agitation grinding 60-90 minute, sieve through 60-80 mesh sieve, remove impurity and get final product.
Coating of the present invention has following beneficial effect:
1. the raw material that coating of the present invention adopts are conventional material, wide material sources, and therefore the coating cost of preparation is low.
2. adopt the coating refractoriness height of the inventive method preparation, the intensity height, and cast(ing) surface crystal grain had good refining effect.
3. coating of the present invention has good suspension, hear resistance, chemical stability and adhesiveness.
The specific embodiment
Embodiment one
A kind of low die casting used for magnesium alloy permanent mold casting coating, this coating is made up of the following component in weight portion: 10 parts of 200-320 purpose silica flours, 25 parts of 150-240 purpose fused magnesites, the zirconium acetate solution of 2 parts of 30-40%, 2 parts of carboxymethyl cellulose acid sodium, 0.5 part of sodium alkyl benzene sulfonate, 1 part of bentonite, 1 part of n-butanol, 0.2 part of surfactant JFC and 20 parts of water.
The preparation method of above-mentioned coating comprises the steps:
1) silica flour and fused magnesite are placed in the coating grinding equipment, add 5 parts of water then, base-material is moistening and stir;
2) with the zirconium acetate solution of 30-40%, carboxymethyl cellulose acid sodium and n-butanol join in the above-mentioned aggregate and stirred 10 minutes;
3) sodium alkyl benzene sulfonate, bentonite, surfactant JFC and 15 parts of water are added in the coating grinding equipment successively, agitation grinding 60 minutes sieves through 60 mesh sieve, removes impurity and gets final product.
Embodiment two
A kind of extrusion casint Al-alloy metal mold casting coating, this coating is made up of the following component in weight portion: 12 parts of 200-320 purpose silica flours, 18 parts of 150-240 purpose fused magnesites, the zirconium acetate solution of 3 parts of 30-40%, 1 part of carboxymethyl cellulose acid sodium, 1 part of sodium alkyl benzene sulfonate, 0.5 part of bentonite, 1 part of n-butanol, 0.5 part of surfactant JFC and 18 parts of water.
The preparation method of above-mentioned coating comprises the steps:
1) silica flour and fused magnesite are placed in the coating grinding equipment, add 8 parts of water then, base-material is moistening and stir;
2) with the zirconium acetate solution of 30-40%, carboxymethyl cellulose acid sodium and n-butanol join in the above-mentioned aggregate and stirred 15 minutes;
3) sodium alkyl benzene sulfonate, bentonite, surfactant JFC and 10 parts of water are added in the coating grinding equipment successively, agitation grinding 90 minutes sieves through 80 mesh sieve, removes impurity and gets final product.
Embodiment three
A kind of gravity-assist pouring aluminium alloy is with permanent mold casting coating, this coating is made up of the following component in weight portion: 11 parts of 200-320 purpose silica flours, 22 parts of 150-240 purpose fused magnesites, 2.5 the zirconium acetate solution of part 30-40%, 1.5 part carboxymethyl cellulose acid sodium, 0.8 part of sodium alkyl benzene sulfonate, 0.8 part of bentonite, 1 part of n-butanol, 0.35 part of surfactant JFC and 19 parts of water.
The preparation method of above-mentioned coating comprises the steps:
1) silica flour and fused magnesite are placed in the coating grinding equipment, add 7 parts of water then, base-material is moistening and stir;
2) with the zirconium acetate solution of 30-40%, carboxymethyl cellulose acid sodium and n-butanol join in the above-mentioned aggregate and stirred 13 minutes;
3) sodium alkyl benzene sulfonate, bentonite, surfactant JFC and 12 parts of water are added in the coating grinding equipment successively, agitation grinding 75 minutes sieves through 70 mesh sieve, removes impurity and gets final product.
Applicant's statement, the present invention illustrates detailed process equipment of the present invention and technological process by 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, any improvement in 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 (2)
1. permanent mold casting coating, it is characterized in that, this coating is made up of the following component in weight portion: 10-12 part 200-320 purpose silica flour, 18-25 part 150-240 purpose fused magnesite, the zirconium acetate solution of 2-3 part 30-40%, 1-2 part carboxymethyl cellulose acid sodium, 0.5-1 part sodium alkyl benzene sulfonate, 0.5-1 part bentonite, 1 part of n-butanol, 0.2-0.5 part surfactant JFC and 10-23 part water.
2. coating as claimed in claim 1, it is characterized in that, this coating is made up of the following component in weight portion: 11 parts of 200-320 purpose silica flours, 22 parts of 150-240 purpose fused magnesites, the zirconium acetate solution of 2.5 parts of 30-40%, 1.5 parts of carboxymethyl cellulose acid sodium, 0.8 part sodium alkyl benzene sulfonate, 0.8 part bentonite, 1 part of n-butanol, 0.35 part of surfactant JFC and 19 parts of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102773848A CN102284676A (en) | 2011-09-19 | 2011-09-19 | Coating for metal mold casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102773848A CN102284676A (en) | 2011-09-19 | 2011-09-19 | Coating for metal mold casting |
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| CN102284676A true CN102284676A (en) | 2011-12-21 |
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| CN2011102773848A Pending CN102284676A (en) | 2011-09-19 | 2011-09-19 | Coating for metal mold casting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008536A (en) * | 2013-01-08 | 2013-04-03 | 辽宁科技学院 | Novel insulated multi-layer coating for permanent mold casting type ferritic nodular cast iron castings |
| CN103008535A (en) * | 2013-01-07 | 2013-04-03 | 鞍钢重型机械有限责任公司 | Quartz powder coating for centrifugal cold mold and preparation using method thereof |
| CN103008534A (en) * | 2012-12-28 | 2013-04-03 | 辽宁科技学院 | Novel heat insulation multilayer coating for common medium carbon steel casting in metal casting production |
| CN104311076A (en) * | 2014-10-13 | 2015-01-28 | 濮阳濮耐高温材料（集团）股份有限公司 | Anti-permeation type tundish light coating and preparation method thereof |
| CN105945211A (en) * | 2016-05-31 | 2016-09-21 | 湖北工业大学 | Water-based casting coating for precoated sand casting and preparation method thereof |
| CN111360196A (en) * | 2020-04-09 | 2020-07-03 | 上海航天精密机械研究所 | Method for improving fluidity of cast magnesium alloy in casting mold |
-
2011
- 2011-09-19 CN CN2011102773848A patent/CN102284676A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008534A (en) * | 2012-12-28 | 2013-04-03 | 辽宁科技学院 | Novel heat insulation multilayer coating for common medium carbon steel casting in metal casting production |
| CN103008535A (en) * | 2013-01-07 | 2013-04-03 | 鞍钢重型机械有限责任公司 | Quartz powder coating for centrifugal cold mold and preparation using method thereof |
| CN103008536A (en) * | 2013-01-08 | 2013-04-03 | 辽宁科技学院 | Novel insulated multi-layer coating for permanent mold casting type ferritic nodular cast iron castings |
| CN104311076A (en) * | 2014-10-13 | 2015-01-28 | 濮阳濮耐高温材料（集团）股份有限公司 | Anti-permeation type tundish light coating and preparation method thereof |
| CN104311076B (en) * | 2014-10-13 | 2016-03-02 | 濮阳濮耐高温材料（集团）股份有限公司 | A kind of impermeabilisation type tundish light paint and preparation method thereof |
| CN105945211A (en) * | 2016-05-31 | 2016-09-21 | 湖北工业大学 | Water-based casting coating for precoated sand casting and preparation method thereof |
| CN111360196A (en) * | 2020-04-09 | 2020-07-03 | 上海航天精密机械研究所 | Method for improving fluidity of cast magnesium alloy in casting mold |
| CN111360196B (en) * | 2020-04-09 | 2021-09-07 | 上海航天精密机械研究所 | Method for improving fluidity of cast magnesium alloy in casting mold |
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Application publication date: 20111221 |