CN203643449U - Differential pressure forming testing device of gel-casting mold - Google Patents
Differential pressure forming testing device of gel-casting mold Download PDFInfo
- Publication number
- CN203643449U CN203643449U CN201320838439.2U CN201320838439U CN203643449U CN 203643449 U CN203643449 U CN 203643449U CN 201320838439 U CN201320838439 U CN 201320838439U CN 203643449 U CN203643449 U CN 203643449U
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- vacuum chamber
- gel
- differential pressure
- pressure forming
- moulding
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Abstract
The utility model discloses a differential pressure forming testing device of a gel-casting mold. The testing device comprises a vacuum chamber, a forming mold arranged at the top end of the vacuum chamber, a valve, a gas control device and a vacuum pump, wherein the vacuum chamber, the valve, the gas control device and the vacuum pump are sequentially communicated; the upper end of the forming mold is opened; a filtering net is arranged at the bottom of the forming mold; a piece of filtering paper is arranged on the filtering net. When the testing device is used, gel is injected into the forming mold, and the vacuum pump is started to form pressure difference inside and outside the vacuum chamber, so that gas and water particles can be removed from the gel through the filtering paper and the filtering net. The testing device has the characteristics of low cost, simplicity in operation, convenience in moving, high practicability, good uniformity of a prepared blank, and the like, and is particularly applicable to research on gel-casting pressure difference forming in laboratories.
Description
Technical field
The utility model relates to a kind of gel injection-moulding differential pressure forming experimental provision, belongs to experimental study equipment technical field.
Background technology
Gelcasting Technique is a kind of new ceramics forming method being proposed first by the U.S.'s Oak Ridge National Laboratory nineties in 20th century, different from traditional shaping method of ceramics, the method combines together high polymer chemistry and traditional ceramics moulding process, utilize organic monomer and crosslinking chemical polymerization reaction take place under the effect of initiating agent of slurry inside, thereby powder is fixed, formed porous ceramics.
Utilize gel casting process to prepare porous ceramics, after gel prepares, need first vacuum stripping, then add initiating agent, and then vacuum stripping, next casting.In this process, if initiating agent addition is very few, slurry is difficult to curing molding or extend set time, not only lowers efficiency, and affects the microstructural homogeneity of green compact; And the addition of initiating agent is larger, it is shorter that slurry starts the curing time, and polyreaction is too fast, may cause the slurry casting that is not also able to do in time just to have cured, also can have influence in addition the homogeneity of green compact, thereby significantly reduce the intensity of sintered body, affect the performance of material.
Utility model content
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of gel injection-moulding differential pressure forming experimental provision, has effectively improved the too short casting problem that has little time set time that slurry too much causes due to initiating agent addition.
Technical scheme: for achieving the above object, gel injection-moulding differential pressure forming experimental provision of the present utility model, comprise vacuum chamber, be arranged at mould, valve and gas control equipment and the vacuum pump on vacuum chamber top, wherein, described vacuum chamber, valve and gas control equipment and vacuum pump order are communicated with; Preferably, described valve and gas control equipment are positioned at the downside of vacuum chamber; The upper end open of described mould, bottom is provided with filter screen, on described filter screen, is provided with filter paper, because the powder that adopts gel casting process to use mostly is nano powder, does not use the words powder of filter paper to be easy to see through and go from filter screen.
Wherein, described vacuum chamber is connected by vacuum chamber wireway with valve and gas control equipment.
Described valve and gas control equipment and vacuum pump are connected by snorkel.
Preferably, the aperture of described filter screen is less than 325 orders.
Described gel injection-moulding differential pressure forming experimental provision also comprises that one for carrying the experiment porch of vacuum chamber, and described vacuum chamber is placed on experiment porch, handled easily.
Principle of work: adopt said apparatus to adding the slurry after catalyzer and initiating agent to process, can carry out in the following way:
Add catalyzer and initiating agent and stir after silicon nitride or alumina slurry injection moulding mould in, open vacuum pump switch, make the air of vacuum chamber inside by valve and gas control equipment and the discharge of vacuum chamber wireway, the inside and outside quick enough large pressure differential that forms of vacuum chamber, bubble in slurry will be discharged by the filter paper of mould bottom and filter screen like this, keep vacuum pump continuous firing until slurry curing moulding, after the final demoulding, form the ceramic body of even structure.
Beneficial effect: compared with prior art, gel injection-moulding differential pressure forming test unit tool of the present utility model has the following advantages:
(1) can fully discharge the bubble in slurry by the pressure differential forming inside and outside vacuum chamber, form the uniform ceramic body of heterogeneous microstructure.
(2) the utility model unites two into one vacuum stripping and two steps of casting, has further simplified operation, has effectively improved the too short casting problem that has little time set time that slurry too much causes due to initiating agent addition simultaneously.
(3) this novel practical apparatus structure is simple, with low cost, easy to use, and is convenient to mobile.
(4) the utility model novel practical flexible operation, mould can be processed multiple being used alternatingly as required, practicablely connects near-net-shape and complex parts moulding.
Accompanying drawing explanation
The structural representation of Fig. 1 the utility model gel injection-moulding differential pressure forming experimental provision.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
A kind of gel injection-moulding differential pressure forming experimental provision, as shown in Figure 1, comprises vacuum chamber 1, mould 2, valve and gas control equipment 3, vacuum pump 4, filter screen 5, filter paper 6, vacuum chamber wireway 7 snorkels 8 and test platform 9.Vacuum chamber 1 is placed on test platform 9, and mould 2 is placed in vacuum chamber 1 and is used in conjunction with above, and has good sealing.Mould upper opening, bottom is that aperture is less than 325 object filter screens 5, is provided with filter paper 6 on filter screen 5, because the powder that adopts gel casting process to use mostly is nano powder, does not use the words of filter paper to be just easy to see through and go from filter screen.Valve and gas control equipment 3 are fixed on the bottom of vacuum chamber 1 by vacuum chamber wireway 7.Vacuum pump 4 is connected with valve and gas control equipment 3 by wireway 8.
Adopt said apparatus to adding the slurry after catalyzer and initiating agent to process, using method is as follows:
Add catalyzer and initiating agent and stir after silicon nitride or alumina slurry injection moulding mould 2 in, open vacuum pump 4 switches, the air that makes vacuum chamber 1 inside is discharged by valve and gas control equipment 3 and vacuum chamber wireway 7, the inside and outside quick enough large pressure differential that forms of vacuum chamber, bubble in slurry will be discharged by the filter paper 6 of mould 2 bottoms and filter screen 5 like this, keep vacuum pump continuous firing until slurry curing moulding, after the final demoulding, form the ceramic body of even structure.
Use device of the present invention, slurry is adding after initiating agent without process vacuum stripping, cast directly in mould, vacuum stripping and casting carry out simultaneously, due to the work of vacuum pump cause vacuum chamber inside and outside mineralization pressure poor, simultaneously the bubble of slurry inside also can, because the effect of air pressure is discharged slurry by filter paper and filter screen, both guarantee the homogeneity of base substrate after slurry curing, does not worry that initiating agent adds the problem that has little time casting when too much simultaneously.
Claims (5)
1. a gel injection-moulding differential pressure forming experimental provision, it is characterized in that, comprise vacuum chamber (1), be arranged at mould (2), valve and gas control equipment (3) and the vacuum pump (4) on vacuum chamber (1) top, wherein, described vacuum chamber (1), valve and gas control equipment (3) and vacuum pump (4) order are communicated with; The upper end open of described mould (2), bottom is provided with filter screen (5), is provided with filter paper (6) on described filter screen (5).
2. gel injection-moulding differential pressure forming experimental provision according to claim 1, is characterized in that, described vacuum chamber (1) is connected by vacuum chamber wireway (7) with valve and gas control equipment (3).
3. gel injection-moulding differential pressure forming experimental provision according to claim 1, is characterized in that, described valve and gas control equipment (3) and vacuum pump (4) are connected by snorkel (8).
4. gel injection-moulding differential pressure forming experimental provision according to claim 1, is characterized in that, the aperture of described filter screen (5) is less than 325 orders.
5. according to the gel injection-moulding differential pressure forming experimental provision described in claim 1 to 4 any one, it is characterized in that, described gel injection-moulding differential pressure forming experimental provision also comprises that one for carrying the test platform (9) of vacuum chamber (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838439.2U CN203643449U (en) | 2013-12-18 | 2013-12-18 | Differential pressure forming testing device of gel-casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838439.2U CN203643449U (en) | 2013-12-18 | 2013-12-18 | Differential pressure forming testing device of gel-casting mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203643449U true CN203643449U (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320838439.2U Expired - Fee Related CN203643449U (en) | 2013-12-18 | 2013-12-18 | Differential pressure forming testing device of gel-casting mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203643449U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643632A (en) * | 2022-01-20 | 2022-06-21 | 山东硅元新型材料股份有限公司 | Ceramic forming method, ceramic preparation method and product |
| CN115534055A (en) * | 2022-11-28 | 2022-12-30 | 山东硅元新型材料股份有限公司 | Gel injection molding mold and process for preparing aluminum oxide double-hole guide rail green body |
-
2013
- 2013-12-18 CN CN201320838439.2U patent/CN203643449U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643632A (en) * | 2022-01-20 | 2022-06-21 | 山东硅元新型材料股份有限公司 | Ceramic forming method, ceramic preparation method and product |
| CN115534055A (en) * | 2022-11-28 | 2022-12-30 | 山东硅元新型材料股份有限公司 | Gel injection molding mold and process for preparing aluminum oxide double-hole guide rail green body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20161218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |