CN101934344A - Moulding sand for vertically divided box-free shoot-squeeze moulding line - Google Patents
Moulding sand for vertically divided box-free shoot-squeeze moulding line Download PDFInfo
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- CN101934344A CN101934344A CN 201010270009 CN201010270009A CN101934344A CN 101934344 A CN101934344 A CN 101934344A CN 201010270009 CN201010270009 CN 201010270009 CN 201010270009 A CN201010270009 A CN 201010270009A CN 101934344 A CN101934344 A CN 101934344A
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Abstract
The invention relates to a moulding sand for vertically divided box-free shoot-squeeze moulding lines, which comprises the components in parts by weight: 80 to 90 parts of return sand, 3 to 8 parts of fresh sand, 1.5 to 3.5 parts of figuline, 1 to 3 parts of pulverized coal and the balance of water, wherein the return sand comprises the following components in parts by weight: 50-70 parts of silica, 20-40 parts of quartz sand and 20-30 parts of yellow sand; and the figuline comprises the components in parts by weight: 70-80 parts of kaolin, 5-10 parts of silica flour and 10-20 parts of clay. The compactibility of moulding sand is 38% to 48%, the green compression strength thereof is 0.12-0.15MPa, the air permeability thereof is 100 to 170, and the mass percent of water is 3.8% to 4.3%. The invention has the advantages of strong fluidity, better air permeability, stronger adhesive strength and high economy, and can be well applied to sand moulding.
Description
Technical field
The present invention relates to a kind of molding sand, relate in particular to a kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line, specifically be applicable to the strong mould of degree of adhesion height, gas permeability that vertical-parting box-less shoot squeeze mo(u)lding line is adopted.
Background technology
Molding sand is to be used for the material of moulding in sand casting, and molding sand is generally mixed according to a certain percentage by Modeling Materials such as casting model powder, moulding sand binder and adminiclies, also can be with natural silica sand argillaceous.The effect of molding sand in casting process is very important, and the casting wasted product that causes because of the poor quality of molding sand accounts for more than 30% of the total waste product of foundry goods.Common requirement to molding sand is: good flowability, certain plasticity, gas permeability and knockability preferably.
The Chinese patent publication number is CN101574725A, and the patent of invention that open day is on November 11st, 2009 discloses a kind of molding sand and preparation technology who is used for cast aluminium, and the molding sand that is used for cast aluminium comprises following component: old sand, fresh sand, bentonite, moisture content; Its preparation technology's mulling method is: according to proportioning weighing old sand, fresh sand, bentonite is done earlier and was mixed 10～20 seconds, adds water again and mixes 80～100 seconds, puts sand about 20 seconds after mixed.Though this invention has strengthened the fineness on aloxite spare surface to a certain extent, its flowability is weak, gas permeability is relatively poor, and degree of adhesion also a little less than, can't be applicable to vertical-parting box-less shoot squeeze mo(u)lding line preferably, promptly can't be applied to the enlightening sand molding.
Summary of the invention
The objective of the invention is to overcome the flowability that exists in the prior art is weak, gas permeability is relatively poor, degree of adhesion is more weak defective and problem, provide a kind of more liquid, gas permeability better, the moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line that degree of adhesion is stronger.
For realizing above purpose, technical solution of the present invention is: a kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line comprises return sand and fresh sand; Described molding sand also comprises potter's clay and coal dust; The weight portion ratio of described return sand, fresh sand, potter's clay and coal dust is: return sand 80-90, and fresh sand 3-8, potter's clay 1.5-3.5, coal dust 1-3, all the other are water.
The constituent of described molding sand and weight portion ratio thereof are: return sand 85, and fresh sand 5.5, potter's clay 2.5, coal dust 2, all the other are water.
The constituent of described return sand and weight portion ratio thereof are: silica 50-70, quartz sand 20-40, yellow ground 20-30.
The constituent of described potter's clay and weight portion ratio thereof are: kaolin 70-80, silica flour 5-10, clay 10-20.
The constituent of described potter's clay and weight portion ratio thereof are: kaolin 75, silica flour 10, clay 15.
The compact rate of molding of described molding sand is 38-48%, and green compression strength is 0.12-0.15Mpa, and gas permeability is 100-170, and the mass percent of water is 3.8-4.3%.
Compared with prior art, beneficial effect of the present invention is:
1, because a kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line of the present invention comprises return sand, fresh sand, potter's clay and coal dust, and its weight portion ratio is: return sand 80-90, fresh sand 3-8, potter's clay 1.5-3.5, coal dust 1-3, wherein, potter's clay can strengthen the degree of adhesion of molding sand, make its compact rate of molding reach 38-48%, and coal dust can strengthen the flowability of molding sand, in addition, the present invention can save production cost guaranteeing the used return sand of a large amount of recovery on the basis of molding sand quality.Therefore the present invention is not only more liquid, degree of adhesion is better, and saving property is bigger.
2, preferred constituent of return sand and the weight portion ratio of using owing to a kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line of the present invention thereof is: silica 50-70%, quartz sand 20-40%, yellow ground 20-30%, this design not only can strengthen gas permeability of the present invention, making its gas permeability is 100-170, and have bigger intensity, be adapted to the enlightening sand molding.Therefore not only gas permeability is stronger in the present invention, and range of application is wider.
The specific embodiment
The present invention is further detailed explanation below in conjunction with the specific embodiment
A kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line comprises return sand and fresh sand, and molding sand also comprises potter's clay and coal dust, and the weight portion ratio of return sand, fresh sand, potter's clay and coal dust is: return sand 80-90, fresh sand 3-8, potter's clay 1.5-3.5, coal dust 1-3, all the other are water.
The constituent and the weight portion ratio thereof of preferred molding sand are: return sand 85, and fresh sand 5.5, potter's clay 2.5, coal dust 2, all the other are water.
The constituent and the weight portion ratio thereof of preferred return sand are: silica 50-70, quartz sand 20-40, yellow ground 20-30.
The constituent and the weight portion ratio thereof of preferred potter's clay are: kaolin 70-80, and silica flour 5-10, clay 10-20, the constituent and the weight portion ratio thereof of further preferred potter's clay are: kaolin 75, silica flour 10, clay 15.
The compact rate of molding of preferred molding sand is 38-48%, and green compression strength is 0.12-0.15Mpa, and gas permeability is 100-170, and the mass percent of water is 3.8-4.3%.
Embodiment 1:
A kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line, its constituent and weight portion ratio thereof are: return sand 80, fresh sand 8, potter's clay 3.5, coal dust 3, all the other are water.The constituent of return sand and weight portion ratio thereof are: silica 50, quartz sand 40, yellow ground 30; The constituent of potter's clay and weight portion ratio thereof are: kaolin 70, silica flour 10, clay 20; Contain 10% alkaline plant ash in the coal dust; The compact rate of molding of molding sand is 38%, and green compression strength is 0.15Mpa, and gas permeability is 170, and the mass percent of water is 4.3%.
Embodiment 2:
A kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line, its constituent and weight portion ratio thereof are: return sand 90, fresh sand 3, potter's clay 1.5, coal dust 1, all the other are water.The constituent of return sand and weight portion ratio thereof are: silica 70, quartz sand 20, yellow ground 20; The constituent of potter's clay and weight portion ratio thereof are: kaolin 80, silica flour 5, clay 15; Contain 5% resin in the coal dust; The compact rate of molding of molding sand is 48%, and green compression strength is 0.12Mpa, and gas permeability is 100, and the mass percent of water is 3.8%.
Embodiment 3;
A kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line, its constituent and weight portion ratio thereof are: return sand 85, fresh sand 5.5, potter's clay 2.5, coal dust 2, all the other are water.The constituent of return sand and weight portion ratio thereof are: silica 60, quartz sand 30, yellow ground 25; The constituent of potter's clay and weight portion ratio thereof are: kaolin 75, silica flour 10, clay 15; Contain 5% alkaline plant ash in the coal dust; The compact rate of molding of molding sand is 42%, and green compression strength is 0.13Mpa, and gas permeability is 140, and the mass percent of water is 4.1%.
Therefore the present invention is not only more liquid, gas permeability is better, and degree of adhesion is strong, saving property is bigger, can be applied to the enlightening sand molding preferably.
The above only is a better embodiment of the present invention; protection scope of the present invention is not exceeded with above-mentioned embodiment; as long as the equivalence that those of ordinary skills do according to disclosed content is modified or changed, all should include in the protection domain of putting down in writing in claims.
Claims (6)
1. a moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line comprises return sand and fresh sand, it is characterized in that: described molding sand also comprises potter's clay and coal dust; The weight portion ratio of described return sand, fresh sand, potter's clay and coal dust is: return sand 80-90, and fresh sand 3-8, potter's clay 1.5-3.5, coal dust 1-3, all the other are water.
2. a kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line according to claim 1 is characterized in that: the constituent of described molding sand and weight portion ratio thereof are: return sand 85, and fresh sand 5.5, potter's clay 2.5, coal dust 2, all the other are water.
3. a kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line according to claim 1 and 2 is characterized in that: the constituent of described return sand and weight portion ratio thereof are: silica 50-70%, quartz sand 20-40%, yellow ground 20-30%.
4. a kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line according to claim 3 is characterized in that: the constituent of described potter's clay and weight portion ratio thereof are: kaolin 70-80, silica flour 5-10, clay 10-20.
5. a kind of moulding sand that is used for vertical-parting box-less shoot squeeze mo(u)lding line according to claim 4 is characterized in that: the constituent of described potter's clay and weight portion ratio thereof are: kaolin 75, silica flour 10, clay 15.
6. according to claim 4 or 5 described a kind of moulding sands that are used for vertical-parting box-less shoot squeeze mo(u)lding line, it is characterized in that: the compact rate of molding of described molding sand is 38-48%, green compression strength is 0.12-0.15Mpa, and gas permeability is 100-170, and the mass percent of water is 3.8-4.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102700096A CN101934344B (en) | 2010-09-02 | 2010-09-02 | Moulding sand for vertically divided box-free shoot-squeeze moulding line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102700096A CN101934344B (en) | 2010-09-02 | 2010-09-02 | Moulding sand for vertically divided box-free shoot-squeeze moulding line |
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| CN101934344A true CN101934344A (en) | 2011-01-05 |
| CN101934344B CN101934344B (en) | 2012-06-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310157A (en) * | 2011-10-13 | 2012-01-11 | 李华山 | Blending ratio of mud core molding sand |
| CN104174809A (en) * | 2014-08-22 | 2014-12-03 | 合肥江淮铸造有限责任公司 | Recyclable casting molding sand with good air permeability and preparation method of sand |
| 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 |
| CN104475644A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Foundry modeling facing sand and preparation method thereof |
| CN107671237A (en) * | 2017-09-28 | 2018-02-09 | 繁昌县琪鑫铸造有限公司 | A kind of automobile brake master cylinder cylinder casting technique |
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| CN101125355A (en) * | 2007-09-28 | 2008-02-20 | 上海应用技术学院 | Resin old sand recovering and utilizing method |
| CN101508006A (en) * | 2009-03-06 | 2009-08-19 | 青岛和德隆机械有限公司 | High-performance dandruff comb clay sand one-piece casting method |
| CN101574725A (en) * | 2008-05-09 | 2009-11-11 | 山东联诚集团有限公司 | Molding sand for aluminum casting and preparation technology thereof |
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2010
- 2010-09-02 CN CN2010102700096A patent/CN101934344B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125355A (en) * | 2007-09-28 | 2008-02-20 | 上海应用技术学院 | Resin old sand recovering and utilizing method |
| CN101574725A (en) * | 2008-05-09 | 2009-11-11 | 山东联诚集团有限公司 | Molding sand for aluminum casting and preparation technology thereof |
| CN101508006A (en) * | 2009-03-06 | 2009-08-19 | 青岛和德隆机械有限公司 | High-performance dandruff comb clay sand one-piece casting method |
Non-Patent Citations (1)
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| 《材料工艺》 20071231 裴柯兴 湿型砂透气性影响因素的分析探讨 41-43 1-6 , 第1期 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310157A (en) * | 2011-10-13 | 2012-01-11 | 李华山 | Blending ratio of mud core molding sand |
| CN104174809A (en) * | 2014-08-22 | 2014-12-03 | 合肥江淮铸造有限责任公司 | Recyclable casting molding sand with good air permeability and preparation method of sand |
| CN104174809B (en) * | 2014-08-22 | 2016-07-06 | 合肥江淮铸造有限责任公司 | A kind of recyclable good permeability casting 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 |
| CN104475644A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Foundry modeling facing sand and preparation method thereof |
| CN107671237A (en) * | 2017-09-28 | 2018-02-09 | 繁昌县琪鑫铸造有限公司 | A kind of automobile brake master cylinder cylinder casting technique |
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| CN101934344B (en) | 2012-06-13 |
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