CN103272993A - Molding sand manufactured from quartz sand as main material and manufacturing method thereof - Google Patents
Molding sand manufactured from quartz sand as main material and manufacturing method thereof Download PDFInfo
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- CN103272993A CN103272993A CN2013101312345A CN201310131234A CN103272993A CN 103272993 A CN103272993 A CN 103272993A CN 2013101312345 A CN2013101312345 A CN 2013101312345A CN 201310131234 A CN201310131234 A CN 201310131234A CN 103272993 A CN103272993 A CN 103272993A
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Abstract
The invention discloses molding sand manufactured from quartz sand as a main material and a manufacturing method thereof. The molding sand comprises, by weight, 90 to 100 parts of quartz sand, 20 to 30 parts of wollastonite powder, 1 to 1.5 parts of phenolic resin glue, 1.2 to 1.4 parts of ethylene bis-stearamide, 0.3 to 0.5 parts of diisobutyl phthalate, 0.2 to 0.5 parts of 3-aminopropyltrimethoxysilane, 30 to 40 parts of clay brick slag powder, 0.05 to 0.07 parts of ferrocene, 0.2 to 0.4 parts of sodium carbonate and 4.0 to 5.5 parts of a film-forming agent. The molding sand has a reasonable formula, is manufactured from quartz sand as a main material, and is added with the wollastonite powder. The used quartz sand has the particle size of 180 to 220 meshes so that strength and heat resistance of the molding sand are improved. The clay brick slag powder as a curing agent is conducive to reduction of roughness of a sand model manufactured from the molding sand. The molding sand has good heat resistance, low roughness and good permeability and can prevent sand sticked to a casing.
Description
Technical field
The present invention relates to a kind of compound method of foundry sand, being specifically related to a kind of is the molding sand and preparation method thereof of major ingredient with quartz sand.
Background technology
The effect of molding sand in Foundry Production is very important, the casting wasted product that causes because of the poor quality of molding sand accounts for 30～50% of the total waste product of foundry goods, usually the requirement to molding sand has intensity and heat endurance, flowability, plasticity, gas permeability and collapsibility, namely whether molding sand destroys easily behind casting solidification, the performance of whether removing from foundry goods easily.
At present, in the preparation process of molding sand, generally be mixed and made into by a certain percentage by fresh sand, old sand, binding agent and auxiliary material.
Summary of the invention
The object of the present invention is to provide a kind of is the molding sand and preparation method thereof of major ingredient with quartz sand.
The present invention adopts following technical scheme:
Be the molding sand of major ingredient with quartz sand, the weight portion of its constitutive material is: quartz sand 90-100, wollastonite in powder 20-30, phenolic resin glue 1-1.5, ethylene group two hard esteramides 1.2-1.4, diisobutyl phthalate 0.3-0.5,3-aminopropyl trimethoxysilane 0.2-0.5, clay brick ground-slag end 30-40, ferrocene 0.05-0.07, sodium carbonate 0.2-0.4.
Be the molding sand of major ingredient with quartz sand, the weight portion of its constitutive material is: quartz sand 95, wollastonite in powder 25, phenolic resin glue 1.2, the two hard esteramides 1.3 of ethylene group, diisobutyl phthalate 0.4,3-aminopropyl trimethoxysilane 0.35, clay brick ground-slag end 35, ferrocene 0.06, sodium carbonate 0.3.
Be the preparation method of the molding sand of major ingredient with quartz sand, may further comprise the steps:
(1) at first quartz sand and wollastonite in powder are crushed to the 180-220 order, in the roughing sand heater, quartz sand and wollastonite in powder are heated to 500-900 ℃ then;
(2) quartz sand of step (1) and wollastonite in powder are poured in the puddle mixer stirred, naturally cool to 100-150 ℃, add other constitutive materials and constantly stirring then successively, it is 1-2s that control adds the stock yard interval, after treating that whole raw materials add, continue the nature cooling, fragmentation, sieve, namely get the molding sand finished product.
The preparation method of described film forming agent is as follows:
Prescription: water 20-25,3-aminopropyl trimethoxysilane 1-2, maleic anhydride 15-18, diethylene glycol butyl ether 5-8, boric acid 1-2, propane diols 8-12, polyvinylpyrrolidone 2-3, alum, urea 1-2, sodium peroxydisulfate 0.5-1;
The preparation method is as follows:
(1), heats water to 80-95 ℃, adding 3-aminopropyl trimethoxysilane, alum, sodium peroxydisulfate dissolving, stirring reaction 50-60 minute;
(2), the reaction system with step (1) is warming up to 140-145 ℃, adding diethylene glycol butyl ether, boric acid, polyvinylpyrrolidone, stirring reaction 40-50 minute;
(3), the reaction system with step (2) is warming up to 110-125 ℃, adding maleic anhydride, urea, propane diols, stirring reaction 40-50 minute; Obtain.
Beneficial effect of the present invention:
The present invention fills a prescription rationally, employing quartz sand is major ingredient, and adding wollastonite in powder, the granularity of quartz sand is the 180-220 order, and the granularity of quartz sand helps to improve intensity and the hear resistance of molding sand, and curing agent clay brick ground-slag end helps to reduce the roughness of the sand mold that molding sand makes up, and the present invention not only hear resistance is better, and roughness is less, and gas permeability is better, can avoid scab on foundry goods.
The specific embodiment
Embodiment 1: be the molding sand of major ingredient with quartz sand, the weight portion of its constitutive material (kg) is: quartz sand 95, wollastonite in powder 25, phenolic resin glue 1.2, the two hard esteramides 1.3 of ethylene group, diisobutyl phthalate 0.4,3-aminopropyl trimethoxysilane 0.35, clay brick ground-slag end 35, ferrocene 0.06, sodium carbonate 0.3 and film forming agent 4.8.
Be the preparation method of the molding sand of major ingredient with quartz sand, may further comprise the steps:
(1) at first quartz sand and wollastonite in powder are crushed to the 180-220 order, in the roughing sand heater, quartz sand and wollastonite in powder are heated to 500-900 ℃ then;
(2) quartz sand of step (1) and wollastonite in powder are poured in the puddle mixer stirred, naturally cool to 100-150 ℃, add other constitutive materials and constantly stirring then successively, it is 1-2s that control adds the stock yard interval, after treating that whole raw materials add, continue the nature cooling, fragmentation, sieve, namely get the molding sand finished product.
The preparation method of described film forming agent is as follows:
Prescription (weight portion): water 22,3-aminopropyl trimethoxysilane 1.5, maleic anhydride 17, diethylene glycol butyl ether 6.5, boric acid 1.5, propane diols 10, polyvinylpyrrolidone 2.5, alum 1, urea 1.5, sodium peroxydisulfate 0.8;
The preparation method is as follows:
(1), heats water to 80-95 ℃, adding 3-aminopropyl trimethoxysilane, alum, sodium peroxydisulfate dissolving, stirring reaction 50-60 minute;
(2), the reaction system with step (1) is warming up to 140-145 ℃, adding diethylene glycol butyl ether, boric acid, polyvinylpyrrolidone, stirring reaction 40-50 minute;
(3), the reaction system with step (2) is cooled to 110-125 ℃, adding maleic anhydride, urea, propane diols, stirring reaction 40-50 minute; Obtain.
The performance data of the molding sand that makes by above-described embodiment:
High temperature compression strength is more than 0.9Mpa, gas forming amount is lower than below the 14ml/g, heat-resistant time 140-180 second, room temperature tensile strength is greater than 3.8Mpa, hot-drawn intensity is greater than 122Mpa, not only hear resistance is better in the present invention, roughness is less, and gas permeability is better, can produce the complicated precision casting of various materials.
Claims (4)
1. one kind is the molding sand of major ingredient with quartz sand, it is characterized in that the weight portion of its constitutive material is: quartz sand 90-100, wollastonite in powder 20-30, phenolic resin glue 1-1.5, ethylene group two hard esteramides 1.2-1.4, diisobutyl phthalate 0.3-0.5,3-aminopropyl trimethoxysilane 0.2-0.5, clay brick ground-slag end 30-40, ferrocene 0.05-0.07, sodium carbonate 0.2-0.4 and film forming agent 4.0-5.5.
2. according to claim 1 is the molding sand of major ingredient with quartz sand, it is characterized in that the weight portion of its constitutive material is: quartz sand 95, wollastonite in powder 25, phenolic resin glue 1.2, the two hard esteramides 1.3 of ethylene group, diisobutyl phthalate 0.4,3-aminopropyl trimethoxysilane 0.35, clay brick ground-slag end 35, ferrocene 0.06, sodium carbonate 0.3 and film forming agent 4.8.
One kind as claimed in claim 1 be the preparation method of the molding sand of major ingredient with quartz sand, it is characterized in that may further comprise the steps:
(1) at first quartz sand and wollastonite in powder are crushed to the 180-220 order, in the roughing sand heater, quartz sand and wollastonite in powder are heated to 500-900 ℃ then;
(2) quartz sand of step (1) and wollastonite in powder are poured in the puddle mixer stirred, naturally cool to 100-150 ℃, add other constitutive materials and constantly stirring then successively, it is 1-2s that control adds the stock yard interval, after treating that whole raw materials add, continue the nature cooling, fragmentation, sieve, namely get the molding sand finished product.
4. according to claim 1 is the molding sand of major ingredient with quartz sand, and it is characterized in that: the preparation method of described film forming agent is as follows:
Prescription: water 20-25,3-aminopropyl trimethoxysilane 1-2, maleic anhydride 15-18, diethylene glycol butyl ether 5-8, boric acid 1-2, propane diols 8-12, polyvinylpyrrolidone 2-3, alum 1-2, urea 1-2, sodium peroxydisulfate 0.5-1;
The preparation method is as follows:
(1), heats water to 80-95 ℃, adding 3-aminopropyl trimethoxysilane, alum, sodium peroxydisulfate dissolving, stirring reaction 50-60 minute;
(2), the reaction system with step (1) is warming up to 140-145 ℃, adding diethylene glycol butyl ether, boric acid, polyvinylpyrrolidone, stirring reaction 40-50 minute;
(3), the reaction system with step (2) is warming up to 110-125 ℃, adding maleic anhydride, urea, propane diols, stirring reaction 40-50 minute; Obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013101312345A CN103272993A (en) | 2013-04-16 | 2013-04-16 | Molding sand manufactured from quartz sand as main material and manufacturing method thereof |
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| CN2013101312345A CN103272993A (en) | 2013-04-16 | 2013-04-16 | Molding sand manufactured from quartz sand as main material and manufacturing method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521694A (en) * | 2013-10-16 | 2014-01-22 | 合肥市田源精铸有限公司 | Sepiolite molding sand and preparation method thereof |
| CN103567358A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Low gas forming amount molding sand for casting and preparation method thereof |
| CN103567362A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Pre-coated sand with high strength and low gas evolution rate and preparation method thereof |
| CN104475644A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Foundry modeling facing sand and preparation method thereof |
| CN104475661A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | High gas-permeability mold core molding sand and preparation method thereof |
| CN104475654A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Rapid heat dissipation foundry molding sand and preparation method thereof |
| CN104493072A (en) * | 2014-11-26 | 2015-04-08 | 马鞍山市恒达耐磨材料有限责任公司 | Molding sand for heat-resistant steel members and preparation method thereof |
| CN109047645A (en) * | 2018-09-30 | 2018-12-21 | 宁波嘉达精密铸造有限公司 | A kind of sand mold casting mold and the method for preparing bucket tooth tooth tip using the sand mold casting mold |
| CN109079094A (en) * | 2018-08-03 | 2018-12-25 | 定远县宝隆机械制造有限公司 | The thermally conductive uniform moulding sand for casting of one kind and its manufacturing process |
| CN109226677A (en) * | 2018-09-30 | 2019-01-18 | 宁波嘉达精密铸造有限公司 | A kind of sand mold casting mold and the method for preparing bucket tooth toothholder using the sand mold casting mold |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567358A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Low gas forming amount molding sand for casting and preparation method thereof |
| CN103567362A (en) * | 2013-10-11 | 2014-02-12 | 铜陵市经纬流体科技有限公司 | Pre-coated sand with high strength and low gas evolution rate and preparation method thereof |
| CN103521694A (en) * | 2013-10-16 | 2014-01-22 | 合肥市田源精铸有限公司 | Sepiolite molding sand and preparation method thereof |
| CN104475644A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Foundry modeling facing sand and preparation method thereof |
| CN104475661A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | High gas-permeability mold core molding sand and preparation method thereof |
| CN104475654A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Rapid heat dissipation foundry molding sand and preparation method thereof |
| CN104493072A (en) * | 2014-11-26 | 2015-04-08 | 马鞍山市恒达耐磨材料有限责任公司 | Molding sand for heat-resistant steel members and preparation method thereof |
| CN109079094A (en) * | 2018-08-03 | 2018-12-25 | 定远县宝隆机械制造有限公司 | The thermally conductive uniform moulding sand for casting of one kind and its manufacturing process |
| CN109047645A (en) * | 2018-09-30 | 2018-12-21 | 宁波嘉达精密铸造有限公司 | A kind of sand mold casting mold and the method for preparing bucket tooth tooth tip using the sand mold casting mold |
| CN109226677A (en) * | 2018-09-30 | 2019-01-18 | 宁波嘉达精密铸造有限公司 | A kind of sand mold casting mold and the method for preparing bucket tooth toothholder using the sand mold casting mold |
| CN109226677B (en) * | 2018-09-30 | 2020-06-26 | 宁波嘉达精密铸造有限公司 | Sand casting mold and method for preparing bucket tooth holder by using same |
| CN109047645B (en) * | 2018-09-30 | 2020-08-21 | 宁波嘉达精密铸造有限公司 | Sand casting mold and method for preparing bucket tooth tip by using same |
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Application publication date: 20130904 |