CN103567366A - High-temperature-resistant low-expansion precoated sand and preparation method thereof - Google Patents
High-temperature-resistant low-expansion precoated sand and preparation method thereof Download PDFInfo
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Abstract
The invention discloses high-temperature-resistant low-expansion precoated sand and a preparation method thereof. The high-temperature-resistant low-expansion precoated sand is prepared from the following raw materials in parts by weight: 55-75 parts of mullite sand, 20-30 parts of corundum powder, 10-15 parts of flint clay, 2-3 parts of iron oxide red, 3-6 parts of alumina silicate fibre, 1-3 parts of cashew nut oil modified phenolic resin, 8-12 parts of urotropine, 1-2 parts of beryllium oxide, 5-8 parts of glycerin monostearate, 2-4 parts of nano silicon carbide, 3-6 parts of coal tar oil, 1.5-2.5 parts of molybdenum disulfide, 1-2 parts of cyclomethicone and 3-5 parts of composite powder. The high-temperature-resistant low-expansion precoated sand has high strength, good high temperature resistance and low thermal expansion rate and also has good sand burning resistance and crack resistance, surface quality of a casting is improved, and the high-temperature-resistant low-expansion precoated sand is applicable to steel casting with high requirements.
Description
Technical field
The present invention relates to a kind of high temperature resistance low-expansion precoated sand and preparation method thereof, belong to molding sand technical field.
Background technology
Precoated sand refers to that sand grain surface is covered with molding sand or the core sand of one deck hard resin film before moulding.Precoated sand is used for making core, and to have coremaking process simple, and production efficiency is high, and sclerous reaction is fast, is out of shape littlely, and precision is high, and core can not produce creep, the feature such as can use for a long time, is widely used in steel-casting, ironcasting.But also exist weak point, such as heat resistance is poor, the easily expansion etc. of being heated, foundry goods easily produces scab, defects i.e.cracks and problem.Therefore, must improve the performance of existing precoated sand, make it meet Production requirement.
Summary of the invention
The object of the invention is to, be heated expansive problem poor for the heat resistance of the existence of prior art, deficiency, improves a kind of high temperature resistance low-expansion precoated sand and preparation method thereof.
The technical solution used in the present invention is as follows:
A precoated sand, is made by the raw material of following weight portion: do not come sand 55-75, schmigel 20-30, flint clay 10-15, iron oxide red 2-3, alumina silicate fibre 3-6, cashew nut oil modified alkyd resin 1-3, methenamine 8-12, beryllium oxide 1-2, glycerin monostearate 5-8, nanometer silicon carbide 2-4, coal tar 3-6, molybdenum bisuphide 1.5-2.5, cyclomethicone 1-2, composite powder 3-5;
The preparation method of described composite powder is as follows: a, by weight 3-5:2-4:1-2, take pyrophillite, bauxite and volcanic rock and mix, pulverized 200-300 mesh sieve, then be placed in the hydrochloric acid solution that concentration is 15-20%, be heated to boiling speed lapping 10-15min, the sodium hydroxide solution regulator solution PH that is 15-20% by concentration again, to neutral, stirs 5-10min under 60-70 ℃ of bath temperature, filters, with distilled water, clean filter residue, dry; The powder of b, above-mentioned oven dry adds water making beating and makes the slurry that solid content is 55-65%, then adds the calgon of 3-5%, the sucrose polyethenoxy ether of the neopelex of 2-3%, 1-2% and the triethanolamine of 2-3%, and speed lapping 10-15min is stand-by; C, get the nano aluminum colloidal sol that is equivalent to pyrophillite amount 15-25% and add in mixer, under stirring, add the sodium lignin sulfonate, the nanometer jade powder of 3-4%, the nano aluminum nitride of 2-3% of 1-2%, the polyglyceryl fatty acid ester of the nano zinc powder of 0.5-1% and 1-2%, under 50-60 ℃ of bath temperature, stir 20-30min, stand-by; D, the nano aluminum colloidal sol after step (c) is processed mix with the slurry that step (b) makes, add the Silicone acrylic emulsion of 5-8%, the sodium carboxymethylcellulose of the polyvinyl acetate emulsion of 3-6%, 2-3%, the Lauryl Alcohol ester of the butyl glycol ether of 0.5-1% and 1-2%, stir 30-40min, filter, dry, pulverize, cross 200-300 mesh sieve;
The solid content of nano aluminum colloidal sol described in above-mentioned preparation method is 15-20%; Described Silicone acrylic emulsion solid content is 40-45%; Described polyvinyl acetate emulsion solid content is 20-30%.
A kind of preparation method of high temperature resistance low-expansion precoated sand, comprise the following steps: by Mo Laisha, flint clay co-grinding, cross 200-300 mesh sieve and schmigel, nanometer silicon carbide, molybdenum bisuphide, alumina silicate fibre, coal tar and cyclomethicone mixed grind 55-75s, then be heated to 135-155 ℃, under stirring, add cashew nut oil modified alkyd resin mixed grind 30-40s; Sand temperature drop during to 95-105 ℃, adds methenamine mixed grind 8-12s, then adds glycerin monostearate, iron oxide red, beryllium oxide and composite powder mixed grind 50-60s; When sand temperature drop to 70 ℃ is following, unload sand, cooling, fragmentation, screening.
Beneficial effect of the present invention:
Precoated sand intensity of the present invention is high, and resistance to elevated temperatures is good, and coefficient of thermal expansion is low, and has good anti-stick grittiness energy, cracking resistance energy, improves the surface quality of foundry goods, and the steel-casting that is applicable to have relatively high expectations, as automobile engine cylinder-body, cylinder cap.
The specific embodiment
A precoated sand, is made by the raw material of following weight (kg): do not come sand 65, schmigel 20, flint clay 15, iron oxide red 2.5, alumina silicate fibre 4, cashew nut oil modified alkyd resin 2, methenamine 10, beryllium oxide 1.5, glycerin monostearate 6, nanometer silicon carbide 3, coal tar 4, molybdenum bisuphide 2, cyclomethicone 1, composite powder 4;
The preparation method of described composite powder is as follows: a, by weight 3:3:2, take pyrophillite, bauxite and volcanic rock and mix, pulverized 300 mesh sieves, then be placed in concentration and be 15% hydrochloric acid solution, be heated to boiling speed lapping 10min, the sodium hydroxide solution regulator solution PH that is 18% by concentration again, to neutral, stirs 8min under 65 ℃ of bath temperatures, filters, with distilled water, clean filter residue, dry; The powder of b, above-mentioned oven dry adds water making beating, and to make solid content be 60% slurry, then add 4% calgon, 3% neopelex, 1.5% sucrose polyethenoxy ether and 2% triethanolamine, and speed lapping 12min is stand-by; C, get the nano aluminum colloidal sol that is equivalent to pyrophillite amount 20% and add in mixer, under stirring, add 1.5% sodium lignin sulfonate, 3% nanometer jade powder, 2% nano aluminum nitride, 0.8% nano zinc powder and 1.5% polyglyceryl fatty acid ester, under 60 ℃ of bath temperatures, stir 25min, stand-by; D, the nano aluminum colloidal sol after step (c) is processed mix with the slurry that step (b) makes, add 6% Silicone acrylic emulsion, 4% polyvinyl acetate emulsion, 2% sodium carboxymethylcellulose, 1% butyl glycol ether and 1% Lauryl Alcohol ester, stir 30min, filter, dry, pulverize, cross 300 mesh sieves;
The solid content of nano aluminum colloidal sol described in above-mentioned preparation method is 15%; Described Silicone acrylic emulsion solid content is 45%; Described polyvinyl acetate emulsion solid content is 20%.
A kind of preparation method of high temperature resistance low-expansion precoated sand, comprise the following steps: by Mo Laisha, flint clay co-grinding, cross 300 mesh sieves and schmigel, nanometer silicon carbide, molybdenum bisuphide, alumina silicate fibre, coal tar and cyclomethicone mixed grind 70s, then be heated to 150 ℃, under stirring, add cashew nut oil modified alkyd resin mixed grind 35s; During sand temperature drop to 95 ℃, add methenamine mixed grind 10s, then add glycerin monostearate, iron oxide red, beryllium oxide and composite powder mixed grind 55s; When sand temperature drop to 70 ℃ is following, unload sand, cooling, fragmentation, screening.
The performance test of the present embodiment molding sand is as follows:
Normal temperature bending strength (MPa): 10.2
Hot bending strength (MPa): 4.8
Coefficient of thermal expansion (%): 0.3
Burning decrement (%): 0.42.
Claims (2)
1. a high temperature resistance low-expansion precoated sand, it is characterized in that, by the raw material of following weight portion, made: do not come sand 55-75, schmigel 20-30, flint clay 10-15, iron oxide red 2-3, alumina silicate fibre 3-6, cashew nut oil modified alkyd resin 1-3, methenamine 8-12, beryllium oxide 1-2, glycerin monostearate 5-8, nanometer silicon carbide 2-4, coal tar 3-6, molybdenum bisuphide 1.5-2.5, cyclomethicone 1-2, composite powder 3-5;
The preparation method of described composite powder is as follows: a, by weight 3-5:2-4:1-2, take pyrophillite, bauxite and volcanic rock and mix, pulverized 200-300 mesh sieve, then be placed in the hydrochloric acid solution that concentration is 15-20%, be heated to boiling speed lapping 10-15min, the sodium hydroxide solution regulator solution PH that is 15-20% by concentration again, to neutral, stirs 5-10min under 60-70 ℃ of bath temperature, filters, with distilled water, clean filter residue, dry; The powder of b, above-mentioned oven dry adds water making beating and makes the slurry that solid content is 55-65%, then adds the calgon of 3-5%, the sucrose polyethenoxy ether of the neopelex of 2-3%, 1-2% and the triethanolamine of 2-3%, and speed lapping 10-15min is stand-by; C, get the nano aluminum colloidal sol that is equivalent to pyrophillite amount 15-25% and add in mixer, under stirring, add the sodium lignin sulfonate, the nanometer jade powder of 3-4%, the nano aluminum nitride of 2-3% of 1-2%, the polyglyceryl fatty acid ester of the nano zinc powder of 0.5-1% and 1-2%, under 50-60 ℃ of bath temperature, stir 20-30min, stand-by; D, the nano aluminum colloidal sol after step (c) is processed mix with the slurry that step (b) makes, add the Silicone acrylic emulsion of 5-8%, the sodium carboxymethylcellulose of the polyvinyl acetate emulsion of 3-6%, 2-3%, the Lauryl Alcohol ester of the butyl glycol ether of 0.5-1% and 1-2%, stir 30-40min, filter, dry, pulverize, cross 200-300 mesh sieve;
The solid content of nano aluminum colloidal sol described in above-mentioned preparation method is 15-20%; Described Silicone acrylic emulsion solid content is 40-45%; Described polyvinyl acetate emulsion solid content is 20-30%.
2. the preparation method of high temperature resistance low-expansion precoated sand according to claim 1, it is characterized in that comprising the following steps: by Mo Laisha, flint clay co-grinding, cross 200-300 mesh sieve and schmigel, nanometer silicon carbide, molybdenum bisuphide, alumina silicate fibre, coal tar and cyclomethicone mixed grind 55-75s, then be heated to 135-155 ℃, under stirring, add cashew nut oil modified alkyd resin mixed grind 30-40s; Sand temperature drop during to 95-105 ℃, adds methenamine mixed grind 8-12s, then adds glycerin monostearate, iron oxide red, beryllium oxide and composite powder mixed grind 50-60s; When sand temperature drop to 70 ℃ is following, unload sand, cooling, fragmentation, screening.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117625A (en) * | 2014-06-26 | 2014-10-29 | 芜湖市鸿坤汽车零部件有限公司 | Alcohol-based casting coating for waste insulating bricks and manufacturing method of coating |
| CN104841870A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Well-formed low-expansion cast precoated sand and preparation method thereof |
| CN104858356A (en) * | 2015-05-07 | 2015-08-26 | 马鞍山市恒毅机械制造有限公司 | Precoated sand for high-strength crack-resistant hot method and preparation method thereof |
| CN108176803A (en) * | 2017-12-01 | 2018-06-19 | 常州思宇知识产权运营有限公司 | The preparation method of absorbent-type precoated sand is split in a kind of resistance to compression |
| CN108176804A (en) * | 2017-12-29 | 2018-06-19 | 沈阳金安铸造材料有限公司 | A kind of preparation method of austenitic stainless steel precoated sand |
| CN108296414A (en) * | 2017-09-27 | 2018-07-20 | 柳州市柳晶科技股份有限公司 | A kind of high temperature resistant 3D printing precoated sand |
| CN114453555A (en) * | 2022-01-26 | 2022-05-10 | 安顺学院 | Preparation process of high-temperature-resistant precoated sand |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060616A (en) * | 1990-09-30 | 1992-04-29 | 国营青岛电站阀门厂 | Moulding sand for casting |
| CN102672109A (en) * | 2012-05-18 | 2012-09-19 | 珠海市斗门福联造型材料实业有限公司 | Easy-to-demould precoated sand and production process of easy-to-demould precoated sand |
| CN102921878A (en) * | 2012-11-14 | 2013-02-13 | 中国重汽集团济南动力有限公司 | Precoated sand and preparation method thereof |
| CN103302230A (en) * | 2012-03-14 | 2013-09-18 | 武安市文祥合金制造有限公司 | Special sand proportiom for casting |
-
2013
- 2013-10-11 CN CN201310472854.5A patent/CN103567366A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060616A (en) * | 1990-09-30 | 1992-04-29 | 国营青岛电站阀门厂 | Moulding sand for casting |
| CN103302230A (en) * | 2012-03-14 | 2013-09-18 | 武安市文祥合金制造有限公司 | Special sand proportiom for casting |
| CN102672109A (en) * | 2012-05-18 | 2012-09-19 | 珠海市斗门福联造型材料实业有限公司 | Easy-to-demould precoated sand and production process of easy-to-demould precoated sand |
| CN102921878A (en) * | 2012-11-14 | 2013-02-13 | 中国重汽集团济南动力有限公司 | Precoated sand and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117625A (en) * | 2014-06-26 | 2014-10-29 | 芜湖市鸿坤汽车零部件有限公司 | Alcohol-based casting coating for waste insulating bricks and manufacturing method of coating |
| CN104841870A (en) * | 2015-05-07 | 2015-08-19 | 马鞍山市恒毅机械制造有限公司 | Well-formed low-expansion cast precoated sand and preparation method thereof |
| CN104858356A (en) * | 2015-05-07 | 2015-08-26 | 马鞍山市恒毅机械制造有限公司 | Precoated sand for high-strength crack-resistant hot method and preparation method thereof |
| CN108296414A (en) * | 2017-09-27 | 2018-07-20 | 柳州市柳晶科技股份有限公司 | A kind of high temperature resistant 3D printing precoated sand |
| CN108176803A (en) * | 2017-12-01 | 2018-06-19 | 常州思宇知识产权运营有限公司 | The preparation method of absorbent-type precoated sand is split in a kind of resistance to compression |
| CN108176804A (en) * | 2017-12-29 | 2018-06-19 | 沈阳金安铸造材料有限公司 | A kind of preparation method of austenitic stainless steel precoated sand |
| CN114453555A (en) * | 2022-01-26 | 2022-05-10 | 安顺学院 | Preparation process of high-temperature-resistant precoated sand |
| CN114453555B (en) * | 2022-01-26 | 2023-04-28 | 安顺学院 | Preparation process of high-temperature-resistant precoated sand |
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Application publication date: 20140212 |