CN1363436A - Casting paint for adsorptive lost Al-alloy mould and its preparing process - Google Patents
Casting paint for adsorptive lost Al-alloy mould and its preparing process Download PDFInfo
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- CN1363436A CN1363436A CN 01142612 CN01142612A CN1363436A CN 1363436 A CN1363436 A CN 1363436A CN 01142612 CN01142612 CN 01142612 CN 01142612 A CN01142612 A CN 01142612A CN 1363436 A CN1363436 A CN 1363436A
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Abstract
An adsorptive paint for the casting Al-alloy with lost mould is prepared from diatomite, pearlite powder, mica powder, silica sol, white emulsoid, polyacrylamide, carboxymethylcellulose sodium, and adsorbent (palygorskite or attapulgite) through preparing solution of adsorbent, carboxymethylcellulose sodium and polyacrylamide in water, mixing with others, grinding ,adding water and stirring. Its advantages include excellent costability, rheopexy and adsorbability and high surface quality of Al casting.
Description
Technical field:
That the present invention relates to is a kind of casting paint for adsorptive lost Al-alloy mould and preparation method, especially a kind ofly has strong adsorptivity, is coated with extension property and thixotropic aluminium alloy lost foam cast paint and preparation method, belongs to metal material and metallurgical class technical field.
Background technology:
In the lost foam casting process, be coated with on the foam plastics mould surface and hang a coating, coating is one of key technology of lost foam casting, it is saying of casting mold that coating is arranged.Foam plastics mould can pyrolysis be liquid state and gaseous products in the casting process, these thermal decomposition products must be discharged die cavity by coating, otherwise can make foundry goods produce blemish, and may be involved in the aluminium liquid and make foundry goods produce serious pore, have a strong impact on the mechanical performance of foundry goods.As document (Y.Sun, H.L.Tsai, D.R.Askeland.Effects of Silicon Content, CoatingMaterials and Gating Design on Casting Defects in the Aluminum Lost Form Process.AFS Transactions[C] .Des Plaines, Illinois, USA:American Foundrymen ' s Society, Inc.Special Publications, 1996:71-279) described.Current lost foam casting aluminum component pore is a great problem that the lost foam casting technology is promoted.The research of at present relevant lost foam paint mainly concentrates on the gas permeability aspect of coating, overemphasize the gas permeability of coating, but because in the aluminium alloy lost foam casting process, because of pouring temperature lower, the main pyrolysis of apperance is a liquid product, as document (J.Fu, H.L.Tsai, D.A.Askeland.Effect ofVent-Holes in Patterns on Filling Process and Casting Quality Using the EvaporativePattern Process, AFS Transactions[C] .Des Plaines, Illinois, USA:AmericanFoundrymen ' s Society, Inc.Special Publications, 1991:305-311) described, for reducing the pore of aluminium casting, aluminium alloy lost foam coating should have the adsorption capacity of liquid towards foamed plastics preferably, and has certain gas permeability simultaneously.And the aluminium alloy lost foam cast paint that uses is at present too considered the gas permeability of coating, seldom considers the eliminating situation of liquid thermal decomposition product, and the adsorptivity research of relevant coating liquid towards thermal decomposition product seldom.
Summary of the invention:
The objective of the invention is to overcome the deficiency of existing aluminium alloy lost foam cast paint, a kind of novel casting paint for adsorptive lost Al-alloy mould and preparation method are proposed, in use, the liquid thermal decomposition product that this coating can the pyrolysis of strong adsorption foam plastics mould produces, and with its eliminating, reduce the blemish of foundry goods, and prevent that it from entering and make aluminum component produce pore in the aluminum melt, reduce the latent defects such as porosity of foundry goods.
For realizing such purpose, the present invention is directed to apperance thermal decomposition product in the aluminium alloy lost foam casting process and be mainly the situation of liquid product, improve the adsorption capacity of coating liquid towards thermal decomposition product emphatically,, improve the surface quality of lost foam casting aluminum component to significantly reduce the porosity of aluminum component.
The chemical substance of casting paint for adsorptive lost Al-alloy mould provided by the invention and existing coating are very different, and have done the big improvement except aggregate composition and proportioning to coating, have also added a certain amount of adsorbent in composition.The mass percent of its composition is: diatomite 10-30%, pearl essence 20-45%, mica powder 10-30%, Ludox 3-10%, white glue with vinyl 1-5%, polyacrylamide 0.1-1%, sodium carboxymethylcellulose 0.1-0.9%, adsorbent 1-8%.Wherein adsorbent can be attapulgite clay, palygorskite clay etc.
The production method of casting paint for adsorptive lost Al-alloy mould of the present invention is: earlier adsorbent is mixed 10-30 part water in colloid mill or ball mill milling 1-5 hour, make first liquid.The water of sodium carboxymethylcellulose being mixed 10-30 part stirs certain hour at mixer and makes second liquid.Polyacrylamide is mixed the hot water of 10-20 part and make third liquid.Again diatomite, pearl essence, mica powder are put into colloid mill or ball mill, added first liquid, second liquid, third liquid, Ludox, white glue with vinyl milling respectively 1-3 hour, in mixer, add an amount of water afterwards and stirred 1-2 hour, get final product the aluminium alloy lost foam cast paint.
During use, adopt the method for dip-coating, flow coat or brushing to be coated with and hang the thick aluminium alloy lost foam cast paint of one deck 0.2-0.5mm on the foam plastics mould surface, treat its stop to drip drop down after, put into 50-55 ℃ baking oven oven dry and can use after 10-24 hour.
Aluminium alloy lost foam cast paint provided by the invention has stronger extension property and the thixotropy of being coated with, the liquid product that produces of absorbent foam plastics apperance pyrolysis effectively in use, prevent to make aluminium casting produce pore in its intrusion aluminum melt, the porosity of aluminum component is dropped to below 0.8%, thereby improved the mechanical performance of foundry goods, and reduced the blemish of foundry goods.
The specific embodiment:
Below by specific embodiment technical scheme of the present invention is further described.
Embodiment 1:
Aluminium alloy lost foam paint ingredient (mass percent): diatomite 20%, pearl essence 40%, mica powder 25%, Ludox 4%, white glue with vinyl 5%, polyacrylamide 0.8%, sodium carboxymethylcellulose 0.2%, palygorskite clay 5%.
Palygorskite clay is mixed 30 parts of water milling 5 hours in colloid mill or ball mill, make first liquid.The water that sodium carboxymethylcellulose is mixed 20 parts is made second liquid at mixer stirring certain hour.The hot water that polyacrylamide is mixed 20 parts is made third liquid.Again diatomite, pearl essence, mica powder are put into colloid mill or ball mill, added first liquid, second liquid, third liquid, Ludox, white glue with vinyl milling respectively 1 hour, in mixer, add an amount of water afterwards and stirred 2 hours, get final product the aluminium alloy lost foam cast paint.
During use, adopt the method for dip-coating, flow coat or brushing to be coated with and hang this coating on the foam plastics mould surface, treat its stop to drip drop down after, put into 55 ℃ baking oven oven dry and use after 24 hours.Coating be coated with extension property, thixotropy is good, can obtain the thick shallow layer of 0.3mm, cast(ing) surface does not have the elephant skin defective, the aluminum component porosity is below 0.8%.
Embodiment 2:
Aluminium alloy lost foam paint ingredient (mass percent): diatomite 30%, pearl essence 20%, mica powder 30%, Ludox 10%, white glue with vinyl 3%, polyacrylamide 0.4%, sodium carboxymethylcellulose 0.6%, attapulgite clay 6%.
Attapulgite clay is mixed 20 parts of water milling 5 hours in colloid mill or ball mill, make first liquid.The water that sodium carboxymethylcellulose is mixed 20 parts is made second liquid at mixer stirring certain hour.The hot water that polyacrylamide is mixed 20 parts is made third liquid.Again diatomite, pearl essence, mica powder are put into colloid mill or ball mill, added first liquid, second liquid, third liquid, Ludox, white glue with vinyl milling respectively 2 hours, in mixer, add an amount of water afterwards and stirred 1 hour, get final product the aluminium alloy lost foam cast paint.
During use, adopt the method for dip-coating, flow coat or brushing to be coated with and hang this coating on the foam plastics mould surface, treat its stop to drip drop down after, put into 55 ℃ baking oven oven dry and use after 16 hours.Coating be coated with extension property, thixotropy is good, can obtain the thick shallow layer of 0.5mm, cast(ing) surface does not have the elephant skin defective, the aluminum component porosity is below 0.6%.
Embodiment 3:
Aluminium alloy lost foam paint ingredient (mass percent): diatomite 20%, pearl essence 40%, mica powder 25%, Ludox 7%, white glue with vinyl 4%, polyacrylamide 0.8%, sodium carboxymethylcellulose 0.2%, attapulgite clay 3%.
Attapulgite clay is mixed 15 parts of water milling 5 hours in colloid mill or ball mill, make first liquid.The water that sodium carboxymethylcellulose is mixed 20 parts is made second liquid at mixer stirring certain hour.The hot water that polyacrylamide is mixed 20 parts is made third liquid.Again diatomite, pearl essence, mica powder are put into colloid mill or ball mill, added first liquid, second liquid, third liquid, Ludox, white glue with vinyl milling respectively 3 hours, in mixer, add an amount of water afterwards and stirred 1.5 hours, get final product the aluminium alloy lost foam cast paint.
During use, adopt the method for dip-coating, flow coat or brushing to be coated with and hang this coating on the foam plastics mould surface, treat its stop to drip drop down after, put into 50 ℃ baking oven oven dry and use after 24 hours.Coating be coated with extension property, thixotropy is good, can obtain the thick shallow layer of 0.2mm, cast(ing) surface does not have the elephant skin defective, the aluminum component porosity is below 0.5%.
Claims (3)
1, a kind of casting paint for adsorptive lost Al-alloy mould is characterized in that the mass percent of its composition is: diatomite 10-30%, pearl essence 20-45%, mica powder 10-30%, Ludox 3-10%, white glue with vinyl 1-5%, polyacrylamide 0.1-1%, sodium carboxymethylcellulose 0.1-0.9%, adsorbent 1-8%.
2, casting paint for adsorptive lost Al-alloy mould as claimed in claim 1 is characterized in that said adsorbent is attapulgite clay, palygorskite clay etc.
3, a kind of preparation method of casting paint for adsorptive lost Al-alloy mould, it is characterized in that earlier adsorbent being mixed 10-30 part water in colloid mill or ball mill milling 1-5 hour, make first liquid, sodium carboxymethylcellulose is mixed the water stirring of 10-30 part and make second liquid, polyacrylamide is mixed the hot water of 10-20 part and make third liquid, again diatomite, pearl essence, mica powder are put into colloid mill or ball mill, add first liquid, second liquid, third liquid, Ludox, white glue with vinyl milling respectively after 1-3 hour, in mixer, add water and stirred 1-2 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142612 CN1131117C (en) | 2001-12-11 | 2001-12-11 | Casting paint for adsorptive lost Al-alloy mould and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142612 CN1131117C (en) | 2001-12-11 | 2001-12-11 | Casting paint for adsorptive lost Al-alloy mould and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1363436A true CN1363436A (en) | 2002-08-14 |
| CN1131117C CN1131117C (en) | 2003-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01142612 Expired - Fee Related CN1131117C (en) | 2001-12-11 | 2001-12-11 | Casting paint for adsorptive lost Al-alloy mould and its preparing process |
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| CN (1) | CN1131117C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364692C (en) * | 2006-08-25 | 2008-01-30 | 蒋文兰 | Water base casting coating material powder for concave convex rod |
| CN101602087B (en) * | 2009-07-13 | 2010-12-29 | 西安建筑科技大学 | Lost foam aluminum casting coating prepared by flyash and preparation method thereof |
| CN103008532A (en) * | 2012-12-21 | 2013-04-03 | 安徽中兴华汉机械有限公司 | Special paint for evaporative pattern aluminum alloy and manufacturing method of special paint |
| CN103826775A (en) * | 2011-09-30 | 2014-05-28 | Ask化学品股份有限公司 | Coating compositions for inorganic casting moulds and cores and use thereof and method for sizing |
| CN103831394A (en) * | 2014-03-04 | 2014-06-04 | 王彦 | Enhanced rapidly-dried coating for investment casting and preparation method of enhanced rapid-drying coating |
| CN104646605A (en) * | 2015-03-05 | 2015-05-27 | 苏州宇希新材料科技有限公司 | Coating for cast aluminum alloy |
| CN105057571A (en) * | 2015-07-27 | 2015-11-18 | 明光市留香泵业有限公司 | High-thermostability water-based paint containing nanometer wollastonite for lost foam casting and manufacturing method of water-based paint |
| CN105057570A (en) * | 2015-07-27 | 2015-11-18 | 明光市留香泵业有限公司 | Water-based paint for lightweight evaporative pattern casting and enhanced by nanometer silicon carbide and preparing method of water-based paint |
| CN106391991A (en) * | 2016-10-24 | 2017-02-15 | 马鞍山顺发机械制造有限公司 | Brightener for casting |
| CN107052228A (en) * | 2017-03-30 | 2017-08-18 | 惠州市吉邦精密技术有限公司 | A kind of high-efficiency and precision casts shell coating quick dry agent processed |
| CN108246966A (en) * | 2018-01-10 | 2018-07-06 | 广东惠和硅制品有限公司 | A kind of Ludox of polymer modification and preparation method thereof |
-
2001
- 2001-12-11 CN CN 01142612 patent/CN1131117C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364692C (en) * | 2006-08-25 | 2008-01-30 | 蒋文兰 | Water base casting coating material powder for concave convex rod |
| CN101602087B (en) * | 2009-07-13 | 2010-12-29 | 西安建筑科技大学 | Lost foam aluminum casting coating prepared by flyash and preparation method thereof |
| CN103826775A (en) * | 2011-09-30 | 2014-05-28 | Ask化学品股份有限公司 | Coating compositions for inorganic casting moulds and cores and use thereof and method for sizing |
| CN103008532A (en) * | 2012-12-21 | 2013-04-03 | 安徽中兴华汉机械有限公司 | Special paint for evaporative pattern aluminum alloy and manufacturing method of special paint |
| CN103831394A (en) * | 2014-03-04 | 2014-06-04 | 王彦 | Enhanced rapidly-dried coating for investment casting and preparation method of enhanced rapid-drying coating |
| CN104646605A (en) * | 2015-03-05 | 2015-05-27 | 苏州宇希新材料科技有限公司 | Coating for cast aluminum alloy |
| CN104646605B (en) * | 2015-03-05 | 2016-07-20 | 苏州宇希新材料科技有限公司 | A kind of Cast aluminium alloy gold coating |
| CN105057571A (en) * | 2015-07-27 | 2015-11-18 | 明光市留香泵业有限公司 | High-thermostability water-based paint containing nanometer wollastonite for lost foam casting and manufacturing method of water-based paint |
| CN105057570A (en) * | 2015-07-27 | 2015-11-18 | 明光市留香泵业有限公司 | Water-based paint for lightweight evaporative pattern casting and enhanced by nanometer silicon carbide and preparing method of water-based paint |
| CN106391991A (en) * | 2016-10-24 | 2017-02-15 | 马鞍山顺发机械制造有限公司 | Brightener for casting |
| CN107052228A (en) * | 2017-03-30 | 2017-08-18 | 惠州市吉邦精密技术有限公司 | A kind of high-efficiency and precision casts shell coating quick dry agent processed |
| CN108246966A (en) * | 2018-01-10 | 2018-07-06 | 广东惠和硅制品有限公司 | A kind of Ludox of polymer modification and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1131117C (en) | 2003-12-17 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI AIERSI LIGHT ALLOY PRODUCTS CO., LTD. Free format text: FORMER OWNER: SHANGHAI JIAOTONG UNIV. Effective date: 20070518 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070518 Address after: 201615, No. nine, Jing Jing Road, Songjiang hi tech park, Jiuting Town, Shanghai, Songjiang District. 1501 Patentee after: Shanghai Aiersi Light Alloy Co., Ltd. Address before: 200030 No. 1954, Huashan Road, Shanghai Patentee before: Shanghai Jiao Tong University |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031217 Termination date: 20111211 |