CN109500983B - Ceramic core cooling mould and biscuit shape correcting method - Google Patents
Ceramic core cooling mould and biscuit shape correcting method Download PDFInfo
- Publication number
- CN109500983B CN109500983B CN201811405508.4A CN201811405508A CN109500983B CN 109500983 B CN109500983 B CN 109500983B CN 201811405508 A CN201811405508 A CN 201811405508A CN 109500983 B CN109500983 B CN 109500983B
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- Prior art keywords
- ceramic core
- cooling
- biscuit
- cooling mould
- mould body
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
- B28B7/42—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for heating or cooling, e.g. steam jackets, by means of treating agents acting directly on the moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/08—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
- B28B11/0872—Non-mechanical reshaping of the surface, e.g. by burning, acids, radiation energy, air flow, etc.
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
- B28B7/44—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for treating with gases or degassing, e.g. for de-aerating
Abstract
The invention discloses a ceramic core cooling mould and a biscuit reshaping method, which comprise the following steps: the cooling mould body is provided with an orthopedic surface for placing a ceramic core biscuit, a covering ring is arranged above the cooling mould body, a plastic film is arranged on the covering ring, the cooling mould body is provided with an air exhaust channel which penetrates from one side to the top, the top outlet of the air exhaust channel is positioned on the outer side of the orthopedic surface for placing the ceramic core biscuit, the air exhaust channel is connected with a vacuum pumping system through a rubber pipe, the cooling mould body is connected with a mould temperature regulator, so that the effect of vacuum cooling of the ceramic core biscuit is realized, auxiliary exhaust is performed when the vacuum pumping channel and an exhaust valve are arranged, the surface of the ceramic core biscuit is uniformly pressed in a vacuum pumping mode, the orthopedic cooling process is completed, and the ceramic core biscuit reverse orthopedic capacity is realized through the temperature control of the cooling mould.
Description
Technical Field
The invention relates to the field of precision investment casting, in particular to a ceramic core cooling mould and a biscuit shape correcting method.
Background
In the traditional process, the ceramic core is prepared by fully mixing inorganic oxide powder such as silicon oxide, aluminum oxide, zirconium oxide and the like with plasticizer such as paraffin, polyethylene and the like at high temperature to prepare ceramic core slurry with certain fluidity, injecting the slurry into a mold at certain temperature and pressure through injection molding to be cooled and molded into a ceramic core biscuit, and sintering the biscuit at high temperature to remove the plasticizer to obtain the finished ceramic core. The biscuit must have good dimensional accuracy before sintering to produce a satisfactory ceramic core. However, the ceramic core slurry has strong thermoplasticity and contractibility due to the addition of the plasticizer, and is very easy to deform in the process from the completion of pressing to the complete cooling of a ceramic core biscuit, so that the biscuit is generally required to be cooled in a solid forming tool.
At present, the ceramic core biscuit cooling solid shape frock mainly has two kinds: one is a cooling mould, and the other is an orthopedic tool. The cooling mould is that the fine structure on the back of the ceramic core leaf basin or leaf is removed and then the ceramic core leaf basin or leaf is arranged on the surface of the mould, the biscuit is placed on the mould, and then the sand bag is placed on the biscuit to complete the pressurizing and cooling process. The ceramic core biscuit is cooled and reshaped by fixing the section sizes on the clamps. The method for cooling the clamping fixture is simple, but the reshaping capacity is limited, and especially the deformed biscuit is difficult to realize reverse deformation; the orthopedic tool has the anti-deformation capability, but the requirements on design and manufacturing technology are high, the manufacturing cost is multiple times of that of a cooling mould, and meanwhile, the full-size orthopedic capability cannot be guaranteed by multi-section orthopedic.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a ceramic core cooling mould and a biscuit reshaping method.
The purpose of the invention is realized by the following technical scheme:
a ceramic core cooling mold comprising: the cooling mould body, the cooling mould body surface has the orthopedic surface that supplies ceramic core biscuit to place, cooling mould body top is provided with the lid and closes the ring, be provided with plastic film on the lid closes the ring, the cooling mould body has the bleed passage that runs through from a side to the top, the export of bleed passage top is located the orthopedic surface off-side that supplies ceramic core biscuit to place, the bleed passage passes through the rubber tube and is connected with the vacuum pumping system, the cooling mould body is connected with the mould temperature regulator to the effect of ceramic core biscuit vacuum cooling has been realized.
One end of the covering ring is hinged with the cooling mould body through a hinge shaft.
According to the ceramic core cooling mould, the side face of the cooling mould body opposite to the hinge shaft is provided with the quick clamping device, and the quick clamping device is used for clamping or loosening the cover ring.
The invention relates to a ceramic core cooling mould, wherein a cover ring is of a sandwich structure and comprises: the plastic film is clamped and fixed by the covering ring upper layer and the covering ring lower layer.
According to the ceramic core cooling mould, the exhaust valve is arranged at the outlet of the top of the exhaust channel.
According to the ceramic core cooling mould, the sealing ring is fixed at the bottom of the lower layer of the covering ring.
A ceramic core biscuit shape correcting method comprises the steps of placing a ceramic core biscuit on a shape correcting surface on the surface of a cooling mould body, installing a plastic film between an upper layer of a covering ring and a lower layer of the covering ring, locking the covering ring by using a quick clamping device, starting a vacuumizing device to enable the plastic film to be tightly attached to the surface of the ceramic core biscuit, breaking vacuum after keeping for a period of time, opening the covering ring, taking down the ceramic core biscuit, and finishing one-time shape correction.
A ceramic core biscuit shape correcting method is characterized in that a cooling mould body is heated through a mould temperature regulator before a vacuumizing system is started for a ceramic core biscuit with large deformation.
A ceramic core biscuit reshaping method is characterized in that the reshaping temperature of the ceramic core biscuit is 25-40 ℃.
The ceramic core biscuit reshaping method has the vacuum degree of the vacuum pumping system not less than-90 KPa.
According to the technical scheme, the invention has the beneficial effects that: the ceramic core biscuit shaping method includes auxiliary exhaust during setting of a vacuumizing channel and an exhaust valve, uniform pressure application on the surface of the ceramic core biscuit in a vacuumizing mode to complete shaping cooling process, and temperature control of the cooling mould to achieve reverse shaping capacity of the ceramic core biscuit.
Drawings
FIG. 1 is a schematic view of an injection molded workpiece cooling mold of the present invention;
FIG. 2 is a top view of a closure ring of an injection molded workpiece cooling fixture in accordance with the present invention;
fig. 3 is a cross-sectional view aa of fig. 2.
Detailed Description
The invention will be further described with reference to specific embodiments and the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention
Referring to fig. 1-3, an embodiment of a ceramic core cooling mold and a biscuit reshaping method according to the present invention is shown, wherein the ceramic core cooling mold comprises: the cooling mould comprises a cooling mould body 1, wherein a correction surface for placing a ceramic core biscuit 8 is arranged on the surface of the cooling mould body 1, a cover ring 5 is arranged above the cooling mould body 1, a plastic film 6 is arranged on the cover ring 5, the cooling mould body 1 is provided with an air exhaust channel 2 penetrating from one side to the top, the top outlet of the air exhaust channel 2 is positioned at the outer side of the correction surface for placing the ceramic core biscuit 8, the air exhaust channel 2 is connected with a vacuum pumping system through a rubber tube 9, the cooling mould body 1 is connected with a mould temperature regulator, so that the effect of vacuum cooling of the ceramic core biscuit 8 is realized, one end of the cover ring 5 is hinged with the cooling mould body 1 through a hinge shaft 4, a quick clamping device 3 is arranged on the side opposite to the hinge shaft 4 of the cooling mould body 1, and the quick clamping device 3 is used for clamping or loosening the cover ring 5, the cover ring 5 is of a sandwich structure comprising: the cover closes ring upper strata 10 and cover and closes ring lower floor 11, plastic film 6 closes ring lower floor 11 through covering and closes ring upper strata 10 and cover and carries out the centre gripping fixed, 2 top exits of bleed passage have discharge valve 7, 11 bottoms of cover ring lower floor are fixed with sealing washer 12.
A ceramic core biscuit shape correcting method comprises the steps of placing a ceramic core biscuit 8 on a shape correcting surface on the surface of a cooling mould body 1, installing a plastic film 6 between a covering ring upper layer 10 and a covering ring lower layer 11, locking a covering ring 5 by using a quick clamping device 3, starting a vacuumizing device to enable the plastic film 6 to be tightly attached to the surface of the ceramic core biscuit 8, breaking vacuum after keeping for a period of time, opening the covering ring 5, taking off the ceramic core biscuit 8 to finish one-time shape correcting, heating the cooling mould body 1 by using a mold temperature adjusting machine before starting a vacuumizing system for the ceramic core biscuit 8 with large deformation, wherein the shape correcting temperature of the ceramic core biscuit 8 is 25-40 ℃, and the vacuum degree of the vacuumizing system is not less than-90 KPa.
For a deformed ceramic core biscuit, the temperature of a mould can be raised through a mould temperature machine, the toughness of the biscuit is enhanced, the temperature of the mould is reduced after the reversible deformation correction is finished, the biscuit is cooled to finish the cooling correction, in order to reduce the cost and have good heat conduction capacity, the cooling mould can be integrally or locally made of aluminum or copper materials, a plastic film can be manually pulled in the vacuumizing process, the phenomenon that a film crease is formed on the surface of the ceramic core biscuit in the vacuumizing process is avoided as much as possible, after the plastic film is completely attached to the surface of the ceramic core biscuit in the correcting process, a sand bag is integrally or locally used for assisting the correction according to the situation, 4) for the deformed ceramic core biscuit, the temperature of the mould is heated and cooled to 40 ℃ through the mould temperature machine, the ceramic core biscuit is placed on the mould, the mould is vacuumized, the sand bag can be placed in a biscuit deformation area to increase the pressure, the temperature of the mould is reduced to 21 ℃ after 30 min, and (4) stopping vacuumizing after the biscuit is completely cooled, and finishing cooling and shape correction of the biscuit.
According to the technical scheme, the invention has the beneficial effects that: the ceramic core biscuit shaping method includes auxiliary exhaust during setting of a vacuumizing channel and an exhaust valve, uniform pressure application on the surface of the ceramic core biscuit in a vacuumizing mode to complete shaping cooling process, and temperature control of the cooling mould to achieve reverse shaping capacity of the ceramic core biscuit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A ceramic core cooling fixture, comprising: cooling mould body (1), cooling mould body (1) surface has the orthopedic face that supplies ceramic core biscuit (8) to place, cooling mould body (1) top is provided with covers and closes ring (5), it is provided with plastic film (6) to cover to close to encircle on (5), cooling mould body (1) has from a side to suction channel (2) that the top runs through, the export of suction channel (2) top is located the orthopedic face outside that supplies ceramic core biscuit (8) to place, suction channel (2) are connected with evacuation system through rubber tube (9), cooling mould body (1) is connected with mould temperature adjusting machine.
2. The ceramic core cooling mold as claimed in claim 1, wherein: one end of the covering ring (5) is hinged with the cooling mould body (1) through a hinge shaft (4).
3. The ceramic core cooling mold as claimed in claim 2, wherein: the cooling mould body (1) and the side face opposite to the hinged shaft (4) are provided with a quick clamping device (3), and the quick clamping device (3) is used for clamping or loosening the cover ring (5).
4. The ceramic core cooling mold as claimed in claim 3, wherein: the covering ring (5) is of a sandwich structure and comprises: the plastic film is characterized in that the upper cover ring layer (10) and the lower cover ring layer (11) are closed, and the plastic film (6) is clamped and fixed through the upper cover ring layer (10) and the lower cover ring layer (11).
5. The ceramic core cooling mold as claimed in claim 4, wherein: an exhaust valve (7) is arranged at the top outlet of the air exhaust channel (2).
6. The ceramic core cooling fixture of claim 5, wherein: and a sealing ring (12) is fixed at the bottom of the lower layer (11) of the covering ring.
7. A method for reshaping a ceramic core biscuit, characterized in that a ceramic core biscuit (8) is placed on a reshaping surface on the surface of a cooling mould body (1) by applying a ceramic core cooling mould according to any one of claims 1 to 6, a plastic film (6) is arranged between an upper cover ring layer (10) and a lower cover ring layer (11), a cover ring (5) is locked by a quick clamping device (3), a vacuumizing device is started to enable the plastic film (6) to cling to the surface of the ceramic core biscuit (8), the cover ring (5) is opened by breaking vacuum after a period of time, and the ceramic core biscuit (8) is taken off to finish primary reshaping.
8. The method for reshaping a ceramic core biscuit according to claim 7, characterized in that the cooling mold body (1) is heated by a mold temperature adjusting machine before starting the vacuum system for the ceramic core biscuit (8) with larger deformation.
9. The method of reshaping a ceramic core biscuit according to claim 8, wherein the temperature of the reshaping of the ceramic core biscuit (8) is between 25-40 degrees celsius.
10. The method of claim 7, wherein the vacuum of the vacuum system is not less than-90 KPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811405508.4A CN109500983B (en) | 2018-11-23 | 2018-11-23 | Ceramic core cooling mould and biscuit shape correcting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811405508.4A CN109500983B (en) | 2018-11-23 | 2018-11-23 | Ceramic core cooling mould and biscuit shape correcting method |
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| Publication Number | Publication Date |
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| CN109500983A CN109500983A (en) | 2019-03-22 |
| CN109500983B true CN109500983B (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811405508.4A Active CN109500983B (en) | 2018-11-23 | 2018-11-23 | Ceramic core cooling mould and biscuit shape correcting method |
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Citations (4)
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|---|---|---|---|---|
| EP0971401A2 (en) * | 1998-07-10 | 2000-01-12 | Apic Yamada Corporation | Method of manufacturing semiconductor devices and a resin molding machine therefor |
| CN1416387A (en) * | 2001-01-10 | 2003-05-07 | 安托林工程集团股份有限公司 | Cooling and counter-pressure method for producing plastic parts by injection |
| CN202151679U (en) * | 2011-07-11 | 2012-02-29 | 潍坊凯力石油化工机械有限公司 | Core box for pumping vacuum to make core |
| CN105855472A (en) * | 2016-04-26 | 2016-08-17 | 东方电气集团东方汽轮机有限公司 | Manufacturing method for hollow ceramic core |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259165B (en) * | 2011-07-11 | 2013-03-20 | 潍坊凯力石油化工机械有限公司 | Vacuum sealing core making method |
| TWI609096B (en) * | 2014-04-23 | 2017-12-21 | 鴻海精密工業股份有限公司 | Coating apparatus |
| CN105665644B (en) * | 2014-11-18 | 2018-05-08 | 中国科学院金属研究所 | A kind of hot sizing technique of ceramic core |
| CN105290335B (en) * | 2015-11-11 | 2018-07-31 | 沈阳黎明航空发动机(集团)有限责任公司 | A method of improving ceramic core mouldability |
-
2018
- 2018-11-23 CN CN201811405508.4A patent/CN109500983B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0971401A2 (en) * | 1998-07-10 | 2000-01-12 | Apic Yamada Corporation | Method of manufacturing semiconductor devices and a resin molding machine therefor |
| CN1416387A (en) * | 2001-01-10 | 2003-05-07 | 安托林工程集团股份有限公司 | Cooling and counter-pressure method for producing plastic parts by injection |
| CN202151679U (en) * | 2011-07-11 | 2012-02-29 | 潍坊凯力石油化工机械有限公司 | Core box for pumping vacuum to make core |
| CN105855472A (en) * | 2016-04-26 | 2016-08-17 | 东方电气集团东方汽轮机有限公司 | Manufacturing method for hollow ceramic core |
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| CN109500983A (en) | 2019-03-22 |
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