CN1109589C - Practical precision investment casting powder and its forming technique - Google Patents
Practical precision investment casting powder and its forming technique Download PDFInfo
- Publication number
- CN1109589C CN1109589C CN97108121A CN97108121A CN1109589C CN 1109589 C CN1109589 C CN 1109589C CN 97108121 A CN97108121 A CN 97108121A CN 97108121 A CN97108121 A CN 97108121A CN 1109589 C CN1109589 C CN 1109589C
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- China
- Prior art keywords
- powder
- investment casting
- semi
- hydrated gypsum
- silica flour
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Dental Prosthetics (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The present invention relates to practical precision investment casting powder and a forming technique thereof. Semi-hydrated gypsum powder, namely plaster of paris, is uniformly mixed with quartz powder; quantitative water is added when the mixture is formed, and molding, solidification and baking are carried out for standby. The present invention has the advantages of simple manufacture technique, wide material source, low cost price, high precision of final cast products and high brightness; turning does need to be carried out; new casting shell powder having low cost, high quality and high performance and a forming technique are provided for precision investment casting in China.
Description
The present invention relates to casting and molding powder and formative technology in the mechanical work moulding.
Existing its casting and molding powder of precision investment casting of China mostly adopts the first-class investment casting shells powder from external import, costs an arm and a leg, casts cost height, buying difficulty.And domestic existing shaping investment pattern adopts refractory material and ethyl silicate aquation impregnation to make shell for several times, put molding box into, add completely rough fire sand, advance roaster and be equipped with casting at 700 ° of-800 ℃ of roasting temperatures, this fusible pattern complex manufacturing technology, working time are long, waste product is many, and the product after the casting is coarse, and fineness is poor, also will go up lathe and carry out turning reprocessing.
The present invention's purpose aim to provide a kind of cost price low, draw materials easily, technology is simple, casting finished product accuracy height, fineness are good, the practical precision investment casting powder and the moulding process that need not to carry out turning reprocessing.
Technical solution of the present invention is: its component of this practical precision investment casting powder is: the semi-hydrated gypsum powder that is the plaster of paris and silica flour, its percentage by weight proportioning is: semi-hydrated gypsum powder 15-25%, silica flour 70-90% mixes.
Moulding process is: get above-mentioned practical precision investment casting powder and water and mix in 100%: 40% ratio (percentage by weight), moulding, solidify after a period of time, after a period of time is toasted in intensification gradually after the curing, promptly become stand-by precision investment casting shell.
The present invention compares with prior art, thoroughly changed precision investment casting shell powder dependence on import, cost an arm and a leg, the situation of supply bottleneck, also changed more domestic units simultaneously and adopted coarse, the low precision of refractory materials and the moulding of ethyl silicate aquation impregnation, the backward situation that fineness is low, waste product is many.The present invention draws materials easily, cost price is low, manufacture craft is simple, survival rate is high, and shaped article precision height, fineness are good, need not to go up lathe again and carries out turning processing, and the disposal molding product can reach the precision and the brightness of former wax-pattern.The present invention provides a kind of low cost, high-quality for China's precision investment casting, and high performance new casting shell powder and moulding process should vigorously promote the use.
Embodiment: get the semi-hydrated gypsum that is the plaster of paris 18% and silica flour 82% by weight percentage, and then add quantitative water, mix, the ratio of the plaster of paris, silica flour and water is: (plaster of paris+silica flour): water=100%: 40%, above-mentioned three is mixed,, solidify at once after a period of time by accurate fusible pattern moulding, after the curing, put into the baking that heats up gradually of baking oven or baker, can be warming up to about 700 ℃, after baking a period of time, can take out fusible pattern, standby as casting.
Can be widely used in the casting fusible pattern of making various metals, alloy and Precision Machinery Elements with this practical precision investment casting powder and moulding process, also can be used for the processing and fabricating fusible pattern of gold and silver, jewellery, purposes is very extensive.
Claims (2)
1, a kind of practical precision investment casting powder is characterized in that its component is: semi-hydrated gypsum powder and silica flour, its percentage by weight proportioning is: semi-hydrated gypsum powder 15-25%, silica flour 70-90% mixes.
2, a kind of practical precision investment casting moulding process, it is characterized in that getting semi-hydrated gypsum powder, silica flour by following percentage by weight proportioning: semi-hydrated gypsum powder 15-25%, silica flour 70-90%, and the ratio proportioning in semi-hydrated gypsum powder, silica flour and water: (semi-hydrated gypsum powder+silica flour): water=100%: 40%, semi-hydrated gypsum powder, silica flour and water mix, moulding, solidify after a period of time, after the curing, baking gradually heats up, after baking a period of time, promptly become stand-by precision investment casting shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97108121A CN1109589C (en) | 1997-06-24 | 1997-06-24 | Practical precision investment casting powder and its forming technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97108121A CN1109589C (en) | 1997-06-24 | 1997-06-24 | Practical precision investment casting powder and its forming technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1203128A CN1203128A (en) | 1998-12-30 |
| CN1109589C true CN1109589C (en) | 2003-05-28 |
Family
ID=5170148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97108121A Expired - Fee Related CN1109589C (en) | 1997-06-24 | 1997-06-24 | Practical precision investment casting powder and its forming technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1109589C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101288896B (en) * | 2007-04-18 | 2010-07-21 | 株式会社三祐 | Gypsum cast material for melt mould casting |
| CN101804442A (en) * | 2010-04-28 | 2010-08-18 | 贾传新 | Precise investment casting powder and investment casting and moulding process thereof |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319668C (en) * | 2005-09-16 | 2007-06-06 | 海南三箭科技开发有限公司 | Cast powder for casting high melting point metal and its usage |
| CN101204827B (en) * | 2007-12-14 | 2010-06-16 | 哈尔滨工业大学 | Preparation method of micro-welding mould quick used plaster casting mold |
| CN102794400A (en) * | 2011-05-24 | 2012-11-28 | 昆山市瑞捷精密模具有限公司 | Method for indirectly manufacturing low-melting-point alloy mold |
| CN103819161B (en) * | 2013-12-17 | 2016-01-20 | 山东沾化奥仕化学有限公司 | A kind of tire casting gypsum powder containing sulfonated melamine compound resin water reducer and preparation method thereof |
| CN104773991B (en) * | 2015-03-27 | 2016-08-31 | 武汉理工大学 | A kind of enhancing crack resistance type mold materials and forming method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1017471B (en) * | 1990-07-30 | 1992-07-15 | 李忠林 | Magnetoelectric heater |
| CN1089195A (en) * | 1992-09-21 | 1994-07-13 | 克洛德·瓦特斯 | investment casting refractory material |
-
1997
- 1997-06-24 CN CN97108121A patent/CN1109589C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1017471B (en) * | 1990-07-30 | 1992-07-15 | 李忠林 | Magnetoelectric heater |
| CN1089195A (en) * | 1992-09-21 | 1994-07-13 | 克洛德·瓦特斯 | investment casting refractory material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101288896B (en) * | 2007-04-18 | 2010-07-21 | 株式会社三祐 | Gypsum cast material for melt mould casting |
| CN101804442A (en) * | 2010-04-28 | 2010-08-18 | 贾传新 | Precise investment casting powder and investment casting and moulding process thereof |
| CN101804442B (en) * | 2010-04-28 | 2012-01-11 | 贾传新 | Precise investment casting powder and investment casting and moulding process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1203128A (en) | 1998-12-30 |
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| C14 | Grant of patent or utility model | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |