CN102039372A - Lost foam casting method - Google Patents
Lost foam casting method Download PDFInfo
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- CN102039372A CN102039372A CN 201110003901 CN201110003901A CN102039372A CN 102039372 A CN102039372 A CN 102039372A CN 201110003901 CN201110003901 CN 201110003901 CN 201110003901 A CN201110003901 A CN 201110003901A CN 102039372 A CN102039372 A CN 102039372A
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Abstract
The invention discloses a lost foam casting method, which mainly comprises the following steps: making a model the same as a solid casting from expanded polystyrene; placing the polystyrene model completely in two halves of sand boxes which can be fastened together or in a modeling pit, filling resin sand and compacting; after the resin sand solidifies, opening the two halves of sand boxes or the modeling pit cover, completely taking out the polystyrene model from the casting mould, applying the casting coating to the cavity, and closing and assembling the box or fastening the modeling pit box cover; and pouring molten iron. Through the lost foam casting method disclosed by the invention, the quality of the obtained casting is comparable with that prepared by the wood type process while the mould cost is much lower; moreover, the natural resources are saved, the processing period is short, the labor time can be shortened and the labor intensity can be reduced.
Description
Technical fieldThe present invention relates to a kind of casting mould.
Background technologyTraditional casting pattern is die model, but because of its cost of manufacture height, waste natural resources and reason such as the process-cycle is long, people make improvements.Having at present directly imbeds in the sand mold with polyethylene foamed (being the benzene plate usually) analogue formation, form the firm and hard body sand mold of benzene casting mold, when pouring molten iron in this entity casting mold, the polystyrene burning, molten iron is full of the occupied space of polystyrene, and the cooling back forms the foundry goods identical with model.People are referred to as " entity lost foam casting " usually.Its weak point is: at first, the free carbon richness that polystyrene burning back produces is amassed on foundry goods inside or cast(ing) surface and is formed carbon distribution, causes finished surface to scrap because of the carbon distribution defective; Secondly, owing to easily coming off, benzene template dope layer forms pigment finish leather, the casting flaw that causes foundry goods bark pocket, slag inclusion, scab etc. to be difficult to overcome in molten steel pouring course; In addition, easily produce the iron burnt-in sand, defectives such as the case that rises, distortion, and the relative die model casting of surface quality of continuous castings is relatively poor.
Summary of the inventionThe object of the present invention is to provide that a kind of cost is low, the process-cycle is short and a kind of lost-foam casting method of good product quality.The present invention mainly is: produce the model of foundry goods with expanded polystyrene (EPS) (EPS), it imbedded in the resin sand sand mold, treat after resin sand solidifies model to be taken out, implement then the routine casting method again pouring molten iron form complete premium casting.
The concrete practice is as follows:
1, produces the same with foundry goods entity model with expanded polystyrene (EPS).
2, place in the sandbox or mold pit that two halves can be buckled together potting resin sand and tamping with this polystyrene model is complete.
3, treat that resin sand solidifies after, open the two halves sandbox or open the mold pit case lid, and the polystyrene model is all taken out from casting mold, the coating of brush casting usefulness in die cavity then, mould assembling assembling or the mold pit case lid fastened again afterwards.
4, implement pouring molten iron and form complete foundry goods.
The present invention compared with prior art has following advantage:
1, the casting quality that is cast out can compare favourably with die model resin sand foundry goods, and has eliminated carbon distribution, slag inclusion, bark pocket, scab and the iron burnt-in sand defective that exists in the entity lost foam casting.
2, polystyrene model cost approximately is 1/30 times of die model cost, well below the die model die cost, and saves natural resources again.
3, saving of work and time is laborsaving, and the process-cycle is short, reduces labour intensity.
The specific embodiment
Example 1
Produce the same with lathe base entity model with expanded polystyrene (EPS), place in the mold pit this polystyrene model is complete, potting resin sand and with making excellent Chong reality firm by ramming.After solidifying through 3 hours resin sand, open the mold pit case lid, take out whole polystyrene, and then in die cavity the coating of brush casting usefulness, again the mold pit case lid is fastened afterwards.Poured weights is 21130 kilograms, and material is the molten iron of HT200, and the foundry goods of opening the sandbox acquisition after the cooling is lathe base.
Example 2
With expanded polystyrene (EPS) produce with quiet revolve the body entity the same model, place in the sandbox that two halves can be buckled together potting resin sand and with this polystyrene model is complete with making excellent Chong reality firm by ramming.After solidifying through 3 hours resin sand, open the two halves sandbox, take out whole polystyrene, and then in die cavity the coating of brush casting usefulness, mould assembling assembling more afterwards.Poured weights is 15 kilograms, and material is the molten iron of HT250, and the foundry goods of opening the sandbox acquisition after the cooling is the quiet body foundry goods that revolves.
Claims (1)
1. lost-foam casting method is characterized in that:
(1) produce the same with foundry goods entity model with expanded polystyrene (EPS),
(2) place in the sandbox or mold pit that two halves can be buckled together this polystyrene model is complete, potting resin sand and Chong are real,
(3) treat that resin sand solidifies after, open two halves sandbox or mold pit case lid, and the polystyrene model all taken out from casting mold, the coating of brush casting usefulness in die cavity then, afterwards again the mould assembling assembling or or the mold pit case lid fastened,
(4) pouring molten iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110003901 CN102039372A (en) | 2011-01-11 | 2011-01-11 | Lost foam casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110003901 CN102039372A (en) | 2011-01-11 | 2011-01-11 | Lost foam casting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102039372A true CN102039372A (en) | 2011-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110003901 Pending CN102039372A (en) | 2011-01-11 | 2011-01-11 | Lost foam casting method |
Country Status (1)
| Country | Link |
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| CN (1) | CN102039372A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211146A (en) * | 2011-05-23 | 2011-10-12 | 大连金河铸造有限公司 | Combined mold for extra-large casting and forging |
| CN102873263A (en) * | 2012-08-31 | 2013-01-16 | 太仓科博尔精密铸业有限公司 | Lost foam casting technology for sand burning-resistance cast steel |
| CN103480816A (en) * | 2012-06-12 | 2014-01-01 | 安庆中船柴油机有限公司 | Casting process for cylinder cover of marine air cylinder |
| CN106180564A (en) * | 2016-08-30 | 2016-12-07 | 上海艺极模具有限公司 | A kind of precision casting process of foaming mould |
| CN109773127A (en) * | 2019-03-19 | 2019-05-21 | 芜湖久弘重工股份有限公司 | A kind of casting and molding method that the wood that disappears combines |
| CN110014120A (en) * | 2019-05-16 | 2019-07-16 | 芜湖久弘重工股份有限公司 | A kind of casting and molding method that the wood that disappears combines |
| CN111804872A (en) * | 2020-06-18 | 2020-10-23 | 东风精密铸造有限公司 | Rapid forming method for casting polystyrene coated sand mold shell by investment casting |
Citations (5)
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| CN1041299A (en) * | 1987-09-15 | 1990-04-18 | 金属铸造有限公司 | Casting metal in the die cavity of the sand of the firm sclerosis of energy of fluidised form |
| CN101185963A (en) * | 2007-12-07 | 2008-05-28 | 肖燕鹏 | Vanishing mould casting technique of blast furnace cooling wall |
| CN101219459A (en) * | 2008-01-25 | 2008-07-16 | 王孝忠 | Method for casting sugar-cane crusher shell with real mould |
| CN101486074A (en) * | 2008-12-05 | 2009-07-22 | 苏州明志科技有限公司 | Disappearance core production method |
| CN101733362A (en) * | 2009-12-24 | 2010-06-16 | 东莞市联发铸造有限公司 | Method for casting metallic mold |
-
2011
- 2011-01-11 CN CN 201110003901 patent/CN102039372A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041299A (en) * | 1987-09-15 | 1990-04-18 | 金属铸造有限公司 | Casting metal in the die cavity of the sand of the firm sclerosis of energy of fluidised form |
| CN101185963A (en) * | 2007-12-07 | 2008-05-28 | 肖燕鹏 | Vanishing mould casting technique of blast furnace cooling wall |
| CN101219459A (en) * | 2008-01-25 | 2008-07-16 | 王孝忠 | Method for casting sugar-cane crusher shell with real mould |
| CN101486074A (en) * | 2008-12-05 | 2009-07-22 | 苏州明志科技有限公司 | Disappearance core production method |
| CN101733362A (en) * | 2009-12-24 | 2010-06-16 | 东莞市联发铸造有限公司 | Method for casting metallic mold |
Non-Patent Citations (1)
| Title |
|---|
| 《第九届全国铸造学会消失模铸造学术年会暨首届全国V法铸造学术年会论文集》 20090911 欧阳书旬等 铸钢节点的复合铸造工艺研究 , 2 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211146A (en) * | 2011-05-23 | 2011-10-12 | 大连金河铸造有限公司 | Combined mold for extra-large casting and forging |
| CN102211146B (en) * | 2011-05-23 | 2014-03-26 | 大连金河铸造有限公司 | Combined mold for extra-large casting and forging |
| CN103480816A (en) * | 2012-06-12 | 2014-01-01 | 安庆中船柴油机有限公司 | Casting process for cylinder cover of marine air cylinder |
| CN103480816B (en) * | 2012-06-12 | 2016-03-30 | 安庆中船柴油机有限公司 | A kind of ship cylinder casting process of cylinder cap |
| CN102873263A (en) * | 2012-08-31 | 2013-01-16 | 太仓科博尔精密铸业有限公司 | Lost foam casting technology for sand burning-resistance cast steel |
| CN102873263B (en) * | 2012-08-31 | 2014-09-17 | 太仓科博尔精密铸业有限公司 | Lost foam casting technology for sand burning-resistance cast steel |
| CN106180564A (en) * | 2016-08-30 | 2016-12-07 | 上海艺极模具有限公司 | A kind of precision casting process of foaming mould |
| CN109773127A (en) * | 2019-03-19 | 2019-05-21 | 芜湖久弘重工股份有限公司 | A kind of casting and molding method that the wood that disappears combines |
| CN110014120A (en) * | 2019-05-16 | 2019-07-16 | 芜湖久弘重工股份有限公司 | A kind of casting and molding method that the wood that disappears combines |
| CN111804872A (en) * | 2020-06-18 | 2020-10-23 | 东风精密铸造有限公司 | Rapid forming method for casting polystyrene coated sand mold shell by investment casting |
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Application publication date: 20110504 |