CN103521680A - Permeable anti-adhesive molding sands and preparation method thereof - Google Patents
Permeable anti-adhesive molding sands and preparation method thereof Download PDFInfo
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- CN103521680A CN103521680A CN201310481148.7A CN201310481148A CN103521680A CN 103521680 A CN103521680 A CN 103521680A CN 201310481148 A CN201310481148 A CN 201310481148A CN 103521680 A CN103521680 A CN 103521680A
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Abstract
The invention provides permeable anti-adhesive molding sands. The molding sands are prepared from the following raw materials in parts by weight: 250-270 parts of silica flour, 60-70 parts of bentonite, 30-40 parts of wood chip, 20-30 parts of rice chaff, 40-50 parts of ceramsite, 90-100 parts of boiler slag, 20-30 parts of calcium carbonate, 30-40 parts of diatomaceous earth, 14-18 parts of corn flour, 3-4 parts of epoxidized soybean oil, and water. The molding sands are rich in pores and good in permeability by using silica flour, bentonite, wood chip, rice chaff and the like; the permeability is increased due to addition of ceramsite, boiler slag and calcium carbonate, the sands are prevented from forming subskin blowholes and good in permeability; the molding sands have excellent adhesion and plasticity combined with the grinded epoxidized soybean oil, the diatomaceous earth and the like, and have high collapsibility. The molding sands do not pollute a cast, and can be easily separated and reclaimed.
Description
Technical field
The present invention relates to a kind of casting field, particularly a kind of Ventilated anti-sticking molding sand and preparation method thereof.
Background technology
Molding sand is in casting, to be used for the material of moulding.Molding sand is generally mixed according to a certain percentage by Modeling Materials such as Foundry sand, moulding sand binder and additional things, also available natural silica sand argillaceous, the sand formulation Sand particle diameter that common cast aluminium is used is too large or too little, molding sand material footpath is too large, although gas permeability is better, aloxite part surface ratio is more coarse, fineness is bad, molding sand material footpath is too little, causes sand mold gas permeability bad, and aluminium casting has pore to produce.Domestic and international widely used coal dust clay green-sand, generally by the mixed system of roughing sand, binding agent, coal dust additive etc. and water, formed, there is certain anti-scab effect and the cost of material is low, production efficiency is high, but its consumption is large, discharge is serious, at casting process coal dust firing, decompose and produce toxic gas and pollute.
Molding sand is different by binding agent used, can be divided into clay-bonded sand, water-glass sand, cement bonded sand, quartz sand etc., and that with clay-bonded sand, water-glass sand and quartz sand, uses is maximum.The effect of molding sand in Foundry Production is very important, and the casting wasted product causing because of the poor quality of molding sand accounts for 30～50% of the total waste product of foundry goods.Conventionally to the requirement of molding sand, be: 1, there is higher intensity and heat endurance, to bear the effect of various external force and high temperature.2, good mobility, the ability that molding sand mutually moves between sand grains under external force or Action of Gravity Field own.3, certain plasticity, molding sand is out of shape under external force, can keep the ability of the shape that gives after external force is removed.4, good gas permeability, molding sand hole sees through the ability of gas.5, high collapsibility, weighs up again grittiness, and after casting solidification, whether molding sand easily destroys, the performance of whether easily removing from foundry goods.
Current casting field development rapidly, higher for the performance requirement of steel-casting and ironcasting, thereby require further to promote the performance of molding sand.
Summary of the invention
The object of the present invention is to provide a kind of Ventilated anti-sticking molding sand and preparation method thereof, this molding sand has the feature of high heat endurance, antiseized, good permeability.
Technical scheme of the present invention is as follows:
A molding sand, is characterized in that being made by the raw material of following weight portion: silica flour 250-270, bentonite 60-70, wood chip 30-40, rice chaff 20-30, haydite 40-50, boiler slag 90-100, calcium carbonate 20-30, diatomite 30-40, corn flour 14-18, epoxidized soybean oil 3-4, water;
The preparation method of described Ventilated anti-sticking molding sand, it is characterized in that comprising the following steps: silica flour, bentonite, wood chip, rice chaff are put into 510-540 ℃ of calcining furnace and calcine 4-5 hour, then, take out, be ground into 300-400 order powder, then add epoxidized soybean oil, suitable quantity of water, dispersed with stirring, pugging, sends in 1320-1350 ℃ of calcining furnace and calcines 3-4 hour, take out and pulverize, obtain calcining material; Again diatomite, haydite, calcium carbonate are mixed, be ground into 50-150 powder material, mix with calcining material and other residual components, add the water that is equivalent to compound 3-6% mix and get final product.
Beneficial effect of the present invention
The present invention has used silica flour, bentonite, wood chip, rice chaff etc., through calcining, has abundant hole, and good permeability has added haydite, boiler slag simultaneously, and calcium carbonate has more increased gas permeability, prevents that subcutaneous blowhole from appearring in product, and good fluidity; In conjunction with adding the grindings such as epoxidized soybean oil, diatomite, make molding sand there is excellent caking property, plasticity, also have high collapsibility simultaneously, molding sand of the present invention does not stain foundry goods, easily separated recovery.
The specific embodiment
A molding sand, by following weight portion (kilogram) raw material make: silica flour 260, bentonite 66, wood chip 35, rice chaff 25, haydite 46, boiler slag 96, calcium carbonate 25, diatomite 34, corn flour 17, epoxidized soybean oil 4, water;
The preparation method of described Ventilated anti-sticking molding sand, comprise the following steps: silica flour, bentonite, wood chip, rice chaff are put into 530 ℃ of calcining furnaces and calcine 4 hours, then, take out, be ground into 340 order powder, then add epoxidized soybean oil, suitable quantity of water, dispersed with stirring, pugging, sends in 1330 ℃ of calcining furnaces and calcines 3.4 hours, take out and pulverize, obtain calcining material; Again diatomite, haydite, calcium carbonate are mixed, be ground into 100 powder materials, mix with calcining material and other residual components, add the water that is equivalent to compound 5% mix and get final product.
The processing performance of the molding sand that the present invention makes:
Green compression strength: 0.128Mpa, air penetrability: 122%, hot green tensile strength: 448Kpa, shatter index: 87%.
Claims (2)
1. a Ventilated anti-sticking molding sand, is characterized in that being made by the raw material of following weight portion: silica flour 250-270, bentonite 60-70, wood chip 30-40, rice chaff 20-30, haydite 40-50, boiler slag 90-100, calcium carbonate 20-30, diatomite 30-40, corn flour 14-18, epoxidized soybean oil 3-4, water.
2. the preparation method of Ventilated anti-sticking molding sand according to claim 1, it is characterized in that comprising the following steps: silica flour, bentonite, wood chip, rice chaff are put into 510-540 ℃ of calcining furnace and calcine 4-5 hour, then, take out, be ground into 300-400 order powder, then add epoxidized soybean oil, suitable quantity of water, dispersed with stirring, pugging, sends in 1320-1350 ℃ of calcining furnace and calcines 3-4 hour, take out and pulverize, obtain calcining material; Again diatomite, haydite, calcium carbonate are mixed, be ground into 50-150 powder material, mix with calcining material and other residual components, add the water that is equivalent to compound 3-6% mix and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310481148.7A CN103521680A (en) | 2013-10-16 | 2013-10-16 | Permeable anti-adhesive molding sands and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310481148.7A CN103521680A (en) | 2013-10-16 | 2013-10-16 | Permeable anti-adhesive molding sands and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103521680A true CN103521680A (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310481148.7A Pending CN103521680A (en) | 2013-10-16 | 2013-10-16 | Permeable anti-adhesive molding sands and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921684A (en) * | 2016-05-26 | 2016-09-07 | 合肥市田源精铸有限公司 | Molding sand with high air permeability and preparing method thereof |
| CN107414014A (en) * | 2017-08-15 | 2017-12-01 | 合肥正明机械有限公司 | A kind of high temperature resistant molding sand |
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| CN1032127A (en) * | 1987-04-04 | 1989-04-05 | 天津市南开区铸造涂料厂 | Composite type binding material for casting |
| CN1060616A (en) * | 1990-09-30 | 1992-04-29 | 国营青岛电站阀门厂 | Moulding sand for casting |
| CN102284674A (en) * | 2011-08-24 | 2011-12-21 | 无锡华冶钢铁有限公司 | Anti-sticking cast molding sand |
| CN102731114A (en) * | 2012-06-08 | 2012-10-17 | 繁昌县琦祥铸造厂 | Molding sand using mullite sand as main body and manufacture method thereof |
| CN103056283A (en) * | 2012-12-25 | 2013-04-24 | 马鞍山市万鑫铸造有限公司 | Molding sand containing halloysite and preparation method thereof |
| CN103100643A (en) * | 2012-12-10 | 2013-05-15 | 马鞍山市万鑫铸造有限公司 | Method for preparing high-crush-resistance casting molding sand |
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2013
- 2013-10-16 CN CN201310481148.7A patent/CN103521680A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032127A (en) * | 1987-04-04 | 1989-04-05 | 天津市南开区铸造涂料厂 | Composite type binding material for casting |
| CN1060616A (en) * | 1990-09-30 | 1992-04-29 | 国营青岛电站阀门厂 | Moulding sand for casting |
| CN102284674A (en) * | 2011-08-24 | 2011-12-21 | 无锡华冶钢铁有限公司 | Anti-sticking cast molding sand |
| CN102731114A (en) * | 2012-06-08 | 2012-10-17 | 繁昌县琦祥铸造厂 | Molding sand using mullite sand as main body and manufacture method thereof |
| CN103100643A (en) * | 2012-12-10 | 2013-05-15 | 马鞍山市万鑫铸造有限公司 | Method for preparing high-crush-resistance casting molding sand |
| CN103056283A (en) * | 2012-12-25 | 2013-04-24 | 马鞍山市万鑫铸造有限公司 | Molding sand containing halloysite and preparation method thereof |
Non-Patent Citations (2)
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| 杜西灵等: "《铸造技术与应用案例》", 31 October 2009 * |
| 耿浩然等: "《实用铸件重力成型技术》", 31 October 2003 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921684A (en) * | 2016-05-26 | 2016-09-07 | 合肥市田源精铸有限公司 | Molding sand with high air permeability and preparing method thereof |
| CN107414014A (en) * | 2017-08-15 | 2017-12-01 | 合肥正明机械有限公司 | A kind of high temperature resistant molding sand |
| CN107414014B (en) * | 2017-08-15 | 2019-12-06 | 宿州速果信息科技有限公司 | High-temperature-resistant molding sand |
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Application publication date: 20140122 |