CN1453083A - Manufacture of no-allowance molding shell for directional solidification casting - Google Patents
Manufacture of no-allowance molding shell for directional solidification casting Download PDFInfo
- Publication number
- CN1453083A CN1453083A CN 03133312 CN03133312A CN1453083A CN 1453083 A CN1453083 A CN 1453083A CN 03133312 CN03133312 CN 03133312 CN 03133312 A CN03133312 A CN 03133312A CN 1453083 A CN1453083 A CN 1453083A
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- powder
- slurry
- ludox
- deck
- surface layer
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- Ceramic Products (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The manufacture process includes painting facing slurry layer onto wax pattern and spreading sand layer, and repeated painting reinforcing slurry layer onto wax pattern and spreading sand layer for several times, and the slurry consists of powder comprising Shangdian clay or high-purity bauxite, analytically pure calcium carbonate, analytically pure boric acid and electrically molten mullite powder, and silica sol. In the facing slurry layer, the powder/ silica sol weight ratio is 2.5-3.5; and in the reinforcing slurry layer, it is 1.5-2.4.
Description
Affiliated technical field
The present invention relates to a kind of manufacture method of casting shell, particularly about the manufacture method of directional solidification casting with no surplus shell.
Background technology
At present, about the manufacture method of directional solidification casting with no surplus shell, the mixed powder and the Ludox of many employing electro-corundum powder and mineralizer are raw material, with powder liquor ratio 1.8-2.7 slurrying, make shell more according to a conventional method, as the 811A shell is exactly wherein a kind of, the shell that discovery is made in this way in the practice, when 1540 ℃ of high temperature, the deadweight degree of deformation is 3.75%, has a strong impact on the product size precision, causes under particular application and can't use, cause waste and economic loss, real in desirable not to the utmost.
Summary of the invention
At above-mentioned weak point, it is a kind of at high temperature little from severe shape degree that the present invention will provide, and product size is stable, is beneficial to the raising dimensional accuracy, yield rate height, the directional solidification casting that interchangeability the is strong manufacture method of no surplus shell.
The technical solution adopted for the present invention to solve the technical problems is: on the wax-pattern surface of determining, be coated with and hang one deck surface layer slurry, spread one deck sand, repeat 2-3 time, be coated with again and hang one deck back-up coat slurry, spread one deck sand, repeat 2-5 time, wherein all contain in surface layer slurry and the back-up coat slurry by Shangdian clay or rafifinal alumina, analyze pure calcium carbonate, analyze pure boric acid, the electrofused mullite powder, at normal temperatures and pressures, each component is 2～4: 1.5～3.5 according to the percentage composition at front sequence in the powder: 0.2～0.5, surplus is the electrofused mullite powder, and surface layer slurry is that the weight ratio of its powder and Ludox is 2.5～3.5 with the stirring of putting together of mixed powder and Ludox, the back-up coat slurry is that the weight ratio of its powder and Ludox is 1.5～2.4 with the stirring of putting together of mixed powder and Ludox.
The invention has the beneficial effects as follows that the shell degree of deformation of conducting oneself with dignity is little under hot conditions, the product percent of pass height, easy to operate, production cost descends.
The specific embodiment
Directional solidification of the present invention is on the wax-pattern surface of determining with the preparation method of no surplus shell, is coated with and hangs one deck surface layer slurry, spreads one deck sand, repeats 2-3 time; Be coated with again and hang one deck back-up coat slurry, spread one deck sand, repeat 2-5 time.Wherein the granularity of the fineness ratio back-up coat sand of surface layer sand is little, and its ratio and dispenses evenly about 1: 3.
All contain by Shangdian clay or rafifinal alumina in surface layer slurry and the back-up coat slurry, analyze pure calcium carbonate, analyze pure boric acid, the electrofused mullite powder, through pulverizing, at normal temperatures and pressures, each component is 2～4: 1.5～3.5 according to the percentage composition at front sequence in the powder: 0.2～0.5, surplus is the electrofused mullite powder, surface layer slurry is with the stirring of putting together of mixed powder and Ludox, the weight ratio of its powder and Ludox is 2.5～3.5, the back-up coat slurry is that the weight ratio of its powder and Ludox is 1.5～2.4 with the stirring of putting together of mixed powder and Ludox.
Claims (1)
1, a kind of directional solidification casting is on the wax-pattern surface with the manufacture method of no surplus shell, be coated with and hang one deck surface layer slurry, spread one deck sand, repeat 2-3 time, be coated with again and hang one deck back-up coat slurry, spread one deck sand, repeat 2-5 time, it is characterized in that all containing in surface layer slurry and the back-up coat slurry by Shangdian clay or rafifinal alumina, analyze pure calcium carbonate, analyze pure boric acid, the electrofused mullite powder, at normal temperatures and pressures, each component is 2～4: 1.5～3.5 according to the percentage composition at front sequence in the powder: 0.2～0.5, surplus is the electrofused mullite powder, and surface layer slurry is that the weight ratio of its powder and Ludox is 2.5～3.5 with the stirring of putting together of mixed powder and Ludox, the back-up coat slurry is that the weight ratio of its powder and Ludox is 1.5～2.4 with the stirring of putting together of mixed powder and Ludox.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03133312 CN1232367C (en) | 2003-05-19 | 2003-05-19 | Manufacture of no-allowance molding shell for directional solidification casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03133312 CN1232367C (en) | 2003-05-19 | 2003-05-19 | Manufacture of no-allowance molding shell for directional solidification casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1453083A true CN1453083A (en) | 2003-11-05 |
| CN1232367C CN1232367C (en) | 2005-12-21 |
Family
ID=29260468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03133312 Expired - Fee Related CN1232367C (en) | 2003-05-19 | 2003-05-19 | Manufacture of no-allowance molding shell for directional solidification casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1232367C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1895815B (en) * | 2005-07-12 | 2011-05-11 | 斯内克马公司 | Lost-wax casting process with contact layer |
| CN101623747B (en) * | 2009-08-10 | 2011-06-08 | 温州市展诚阀门有限公司 | Direct investment casting forming technology of valve small-diameter trapezoidal internal thread |
| CN102847875A (en) * | 2012-07-09 | 2013-01-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Shell making process method for vane directional solidification and alloy sand-burning prevention |
| CN1895816B (en) * | 2005-07-12 | 2013-05-22 | 斯内克马公司 | Lost-wax casting process |
| CN109261900A (en) * | 2018-11-26 | 2019-01-25 | 惠州市吉邦精密技术有限公司 | A kind of process for making shell of metal parts precision casting shell |
-
2003
- 2003-05-19 CN CN 03133312 patent/CN1232367C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1895815B (en) * | 2005-07-12 | 2011-05-11 | 斯内克马公司 | Lost-wax casting process with contact layer |
| CN1895816B (en) * | 2005-07-12 | 2013-05-22 | 斯内克马公司 | Lost-wax casting process |
| CN101623747B (en) * | 2009-08-10 | 2011-06-08 | 温州市展诚阀门有限公司 | Direct investment casting forming technology of valve small-diameter trapezoidal internal thread |
| CN102847875A (en) * | 2012-07-09 | 2013-01-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Shell making process method for vane directional solidification and alloy sand-burning prevention |
| CN102847875B (en) * | 2012-07-09 | 2015-12-16 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of process for making shell method of solidifying for blades oriented, preventing alloy scab |
| CN109261900A (en) * | 2018-11-26 | 2019-01-25 | 惠州市吉邦精密技术有限公司 | A kind of process for making shell of metal parts precision casting shell |
| CN109261900B (en) * | 2018-11-26 | 2020-12-29 | 惠州市吉邦精密技术有限公司 | Shell manufacturing process for metal part precision casting shell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1232367C (en) | 2005-12-21 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051221 Termination date: 20160519 |