EP1399304A1 - Verfahren und vorrichtung zum schlickergiessen unter druckeinwirkung - Google Patents
Verfahren und vorrichtung zum schlickergiessen unter druckeinwirkungInfo
- Publication number
- EP1399304A1 EP1399304A1 EP02747420A EP02747420A EP1399304A1 EP 1399304 A1 EP1399304 A1 EP 1399304A1 EP 02747420 A EP02747420 A EP 02747420A EP 02747420 A EP02747420 A EP 02747420A EP 1399304 A1 EP1399304 A1 EP 1399304A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slip
- hollow body
- body element
- mold cavity
- mold
- Prior art date
- 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.)
- Granted
Links
Classifications
-
- 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
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses
-
- 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
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
- B28B1/265—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor pressure being applied on the slip in the filled mould or on the moulded article in the mould, e.g. pneumatically, by compressing slip in a closed mould
Definitions
- the invention is concerned with a method for slip casting under pressure for the production of ceramic goods, in particular hollow ceramic goods, and with a device for slip casting under pressure for the production of the aforementioned objects.
- Shaping devices for use in slip casting ceramic objects using pressure already exist, and pressure slip casting systems are also known.
- slip is introduced into a mold cavity and pressurized, for which purpose corresponding slip lines and pressure medium lines are provided, which open into the mold cavity, which is enclosed by one or more molded parts.
- pressure medium for example pressure oil for conventional pressure generation with piston pumps, which for example comprises two pistons connected to one another via a piston rod, one of which is pressurized with pressure oil and the other applies the appropriate pressure to the slip, it can become contaminated ceramic goods to be produced and also in the case of the walls of the mold part or parts of the mold delimiting the mold cavity due to unavoidable leaks in the hydraulic system.
- the invention aims to provide a method and a device for slip casting under pressure for the production of ceramic goods, in particular hollow ceramic goods, with which the difficulties described can be overcome and also high-quality ceramic goods, in particular hollow ceramic goods such as cans or the like, in an effective manner can be produced inexpensively and simply.
- a method for casting slip under the action of pressure for the production of ceramic material, in particular hollow ceramic material is provided, in which slip is filled into a mold cavity formed by a mold and under excess pressure to form cullet for the Ceramic goods is placed.
- this method is characterized in that after the mold cavity has been filled with slip, an inflatable hollow body element made of non-porous but flexible material is inserted into the slip while being immersed in the slip, which is then balloon-like by fluid pressure in the interior of the hollow body element for pressurizing the slip is inflated when the mold is closed.
- the mold cavity which is delimited by the shape, is thus first filled with slip, and for this purpose, for example, slip lines with valves therein and a conventional slip pump can be used, which can remain filled with slip even during downtimes, since the pressurization of the into the
- the mold cavity filled in slip is carried out separately from the slip filling with the aid of the hollow body element which can be inflated like a balloon, for which purpose a fluid pressure medium is introduced into the interior of the hollow body element with the mold closed.
- a pressure-free slip supply system can also be used, in which the slip is only conveyed into the mold cavity with the aid of gravity.
- the fluid pressure medium does not come into direct contact with the slip mass, since the hollow body element is made of a non-porous material, and therefore only the balloon-like inflatable outer skin of the hollow body element comes into direct contact with the slip mass. Impairments due to possible contamination of the slip mass caused by the pressure medium and also in the area of the walls of the mold or the mold parts delimiting the mold cavity can thus be effectively avoided, so that on the one hand in particular high-quality hollow ceramic goods can be produced effectively and with a high output, and on the other hand, the procedure, in particular extremely easy to maintain is because no time-consuming and costly cleaning or post-treatment of the walls of the mold cavity are required and / or there is no risk of rejects with the ceramic material.
- the slip supply devices do not need to be emptied and cleaned, for example, during downtimes. This can significantly reduce the maintenance effort.
- the method according to the invention allows the inflatable hollow body element to be adapted in terms of its shape and / or shape to the ceramic material to be produced in each case and also in terms of size. This is particularly of great advantage in the production of hollow ceramic goods, such as jugs or the like. Furthermore, in the event of wear, the hollow body element can be exchanged and replaced quickly and easily.
- the fluid pressure in the interior of the hollow body element is preferably generated by water and can be of the order of about 20 to about 40 bar. Since no fluid pressure medium that tends to be contaminated is used, any difficulties associated therewith can be eliminated.
- the pressurization can also be regulated and controlled in a constructively simple manner and in the desired manner.
- the hollow body element is preferably introduced into the slip in the non-inflated state up to the desired position and then the fluid pressure in the interior of the hollow body element is preferably built up gradually increasing.
- the uninflated hollow body element is immersed, slurry is displaced in the mold cavity, preferably in such a way that essentially the excess slip exceeds the actual mold cavity which determines the ceramic material, but it is also ensured that the entire mold cavity formed by the mold Completely and is evenly filled with slip.
- the application of fluid pressure can be controlled in time and it is maintained until an at least partially solidified ceramic shard has formed in the mold cavity.
- the fluid pressure in the interior of the hollow body element is preferably gradually reduced. This breakdown can also be timed in a suitable manner if necessary. In all of these control measures, a respective adjustment to the ceramic material to be produced is possible without difficulty, for example by means of simple tests.
- the hollow body element is then removed from the mold cavity without fluid pressure after the body formation.
- the ceramic material thus produced according to the invention can then be removed from the mold cavity in a suitable manner and, in the case of a multi-part mold, the individual molded parts can then be detached from one another, so that the ceramic material thus formed is accessible for all further treatments and, if appropriate, transported to further treatment plants can.
- the inflatable hollow body element is preferably motionally connected to a form closure part. It can thus be achieved in a process-technically simple manner that when the inflatable hollow body element is inserted, the mold cavity which was still open and filled with slip is sealed at the same time, and that when the ceramic material has been formed in the mold cavity with regard to its shape, the shape is also partially can be opened with the removal of the inflatable hollow body element. This allows multiple movements when performing the Combine the inventive method with each other to achieve an improved manufacturing effectiveness.
- a device for slip casting under pressure for the production of ceramic goods, in particular hollow ceramic goods is provided with a mold enclosing a mold cavity for slip casting under pressure, which is characterized in that a hollow body element which is inflatable like a balloon by means of fluid pressure non-porous, but flexible material is provided, which can be immersed in the slip filled in the mold cavity and can be removed therefrom after the body formation in the drained state.
- the hollow body element In the balloon-like inflated state, the hollow body element generates pressurization on the slip in the mold cavity, but the pressurization medium does not come into direct contact with the slip or with the boundary walls of the mold cavity.
- the device according to the invention is designed to be structurally uncomplicated and permits reliable operation.
- the inflatable hollow body element is preferably attached to a free end of a rigid tube section as a holder which introduces the fluid pressure medium into the interior of the hollow body.
- This tube section which serves as a holder, thus also serves to introduce the fluid pressure medium and reliably holds the inflatable hollow body element made of non-porous but flexible material at its free end.
- the inflatable hollow body element is preferably connected to a form closure part via the tube section and is movable together with the latter for immersion and removal.
- the inflatable hollow body element moves in and out Form cavity delimiting mold are completely closed or at least partially opened again.
- a separate slip line is provided for filling the still partially open mold cavity with slip, without this coming into contact with the inflatable hollow body element, so that the slip supply line in the device according to the invention is also physically separate from the pressurization by the inflatable hollow body element. No emptying and / or cleaning of the lines carrying the slip, such as pumps, valves and the like, is therefore necessary. This ensures maintenance-friendly operation of the device according to the invention.
- the slurry in the mold cavity is not acted upon directly by a pressure medium, but that the pressurization takes place separately by means of an inflatable hollow body element after the mold cavity has been filled with slurry.
- contamination on the form and on the ceramic material can be avoided on the one hand, and in particular hollow ceramic objects with high quality can be produced in an effective manner in a universal manner, since the size, shape and shape of the inflatable hollow body element can be adapted to the respective existing requirements, which the production of the desired ceramic material, in particular the desired hollow ceramic material, must be taken into account.
- Figure 1 shows a device for slip casting under pressure with a partially open mold to illustrate the filling of the mold cavity with slip.
- FIG. 2 shows a view similar to FIG. 1 after the mold cavity has been filled with slip and with the inflatable hollow body element partially immersed in connection with a mold closure part;
- FIG. 3 is a view similar to FIG. 2, in which the inflatable hollow body element for pressurizing the slip in the mold cavity is shown in the at least partially inflated state.
- FIG. 1 shows a shape designated overall by 1, which is designed, for example, in several parts and can comprise individual molded parts made of the same and / or different materials.
- An opening 3 is provided in an upper molded part 2.
- Form 1 encloses you a total of 4 designated mold cavity, which is contoured and designed according to the ceramic material to be produced.
- Slurry 7 is filled into the mold cavity 4 via the opening 3 via a schematically illustrated slip supply device 5, which may include a slip line 6, optionally with valves and a pump.
- the mold cavity 4 can also be filled with slip 7, if appropriate without pressure, only by using gravity.
- the mold cavity 4 is at least partially filled with slip 7, as is illustrated by horizontal hatching.
- a hollow body element 8 which is fastened to a pipe section 9 as a holder, is then expediently, together with a mold closure part 10, into the slip 7 in the mold cavity 4 in the mold cavity 4 in the non-inflated state introduced.
- the hollow body element 8 is made of a non-porous but flexible material, and it can be inflated like a balloon by means of a suitable internal pressure.
- a fluid pressure which can amount to approximately 20 to approximately 40 bar, is preferably applied to the interior of the hollow body element 8 via the tube section 9. All conventional printing media into consideration, and in particular the use of water as a pressure medium in the method according to the invention is extremely useful. Due to the internal pressure in the hollow body element 8, the latter is inflated like a balloon and the slip surrounding the outer wall of the hollow body element 8 is pressurized in a suitable manner. This pressure preferably acts on all sides via the outside of the hollow body element 8 on the surrounding slip. This also results in the most uniform possible pressurization.
- the hollow body element 8 is preferably subjected to a suitable internal pressure gradually increasing with a suitable fluid medium, so that the slip 7 is displaced more and more until finally the final shape of the inner cavity of the ceramic material to be produced is reached.
- the inflatable hollow body element 8 can be adapted in an uncomplicated manner to the particular requirements in terms of shape, size and material.
- the hollow body element 8 is inflated in a balloon-like manner, similar to the shape of a light bulb, in order to form the inner cavity of the jug in a correspondingly contoured manner.
- the device is then kept in the state shown in FIG. 3, for example, until a ceramic shard is formed in the mold cavity 4 by solidification.
- a ceramic shard is solidified at least to the extent that it can be handled independently and largely without damage after removal from the mold 1, and can be transported, for example, to corresponding further processing devices, such as a drying device, a burning device and the like.
- the inflatable hollow body element 8 is released, ie the internal fluid pressure in the hollow body element 8 is reduced, and preferably also gradually decreasing.
- the hollow body element 8 is in the fluid-pressure-free state, it is then preferably moved out of the mold cavity 4 together with the mold closure part 10, expediently in such a way that the mold closure part 10 is at least partially or completely lifted off.
- the device then assumes, for example, the state shown in FIG. 1, apart from the fact that a self-solidifying ceramic shard is now formed in the mold cavity 4, which in the example shown encloses a hollow interior, so that it is, for example, a hollow ceramic material.
- the excess slip still located in the mold cavity 4 can then, for example, be poured off via the opening 3 or can be discharged in another suitable manner, for example with the aid of gravity.
- the mold 1 can then be opened further and completely by moving the correspondingly assigned molded parts of the mold 1 from one another, so that the ceramic body, for example, is almost completely is exposed and, for example, only stands upright on the floor on an assigned molded part of the mold.
- the ceramic shards thus formed can now be removed from mold 1 and conveyed to the correspondingly suitable aftertreatment devices.
- the pressure medium for pressurizing the hollow body element 8 does not come into contact with the slip or with the ends which delimit the mold cavity 4.
- the Hollow body element 8 is namely made of a non-porous material so that the pressurizing medium cannot escape through the wall of hollow body element 8 and diffuse, for example, into the slip. Therefore, contamination of the molded parts of the mold 1 and / or the slip 7 and / or the ceramic shards formed therefrom can be effectively excluded. This eliminates the need for complex Form 1 cleaning work and the cause of rejects can be eliminated.
- the size, the shape and the material of the balloon-like inflatable hollow body element 8 can be adapted to the respective requirements without difficulty, as a result of which the shape and type of the ceramic material to be produced are essentially influenced.
- the filling of the mold 1 with slip 7 is realized completely separately from the shaping of the ceramic body in the mold cavity 4 using the inflatable hollow body element 8, so that the slip supply system can be selected with regard to its design independently of the shape of the ceramic body in the mold cavity 4.
- the fluid pressure medium for inflating the hollow body element 8 can also be selected without taking into account the design of the slip supply device 5. This results in a largely universal replaceability of the method and the device according to the invention in the production of ceramic material by means of slip casting under pressure.
- the pressurizing medium for the inflatable hollow body element 8 can be selected in a suitable manner in each case.
- the number and design of the molded parts of mold 1 can change in accordance with the ceramic material to be produced.
- Various types of materials come into consideration for the production of the inflatable hollow body element, all of which have in common that they have a non-porous but flexible behavior, at least when ready for use.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10130186 | 2001-06-22 | ||
DE2001130186 DE10130186A1 (de) | 2001-06-22 | 2001-06-22 | Verfahren und Vorrichtung zum Schlickergießen unter Druckeinwirkung |
PCT/EP2002/006863 WO2003000476A1 (de) | 2001-06-22 | 2002-06-20 | Verfahren und vorrichtung zum schlickergiessen unter druckeinwirkung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1399304A1 true EP1399304A1 (de) | 2004-03-24 |
EP1399304B1 EP1399304B1 (de) | 2008-09-24 |
Family
ID=7689102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02747420A Expired - Lifetime EP1399304B1 (de) | 2001-06-22 | 2002-06-20 | Verfahren und vorrichtung zum schlickergiessen unter druckeinwirkung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1399304B1 (de) |
DE (2) | DE10130186A1 (de) |
WO (1) | WO2003000476A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011061593A1 (en) | 2009-11-17 | 2011-05-26 | Maprof Sas Di Renzo Moschini E C. | Method for manufacturing monolithic bodies by means of a casting or injection molding process |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2858611B1 (fr) * | 2003-08-07 | 2006-11-24 | Saint Gobain Ct Recherches | Procede de fabrication d'une piece en silice amorphe frittee, moule et barbotine mis en oeuvre dans ce procede |
CN101417463B (zh) * | 2008-05-09 | 2010-08-18 | 上海奇谋能源技术开发有限公司 | 一种空腔陶瓷器的成型方法 |
CN103171022B (zh) * | 2013-04-03 | 2016-02-17 | 荣县利友陶瓷技术服务有限公司 | 一种陶坯成型方法及装置 |
CN106426514B (zh) * | 2016-08-19 | 2019-03-22 | 九牧厨卫股份有限公司 | 一种将连体坐便器圈箱一体坯体与本体坯体进行粘接的工艺 |
CN107102106B (zh) * | 2017-06-02 | 2023-12-12 | 浙江大学 | 流量-压力两控式室内试验注浆装置 |
DE102020100414A1 (de) | 2020-01-10 | 2021-07-15 | Lippert Gmbh & Co. Kg | Batteriedruckguss für keramische Hohlkörper |
DE102022115107A1 (de) * | 2022-06-15 | 2023-12-21 | Sama Maschinenbau Gmbh | Druckgießform |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1693429A (en) * | 1926-07-02 | 1928-11-27 | Ohio Brass Co | Method of casting |
FR996762A (fr) * | 1945-06-07 | 1951-12-26 | Procédé de fabrication de corps creux par moulage | |
US3470284A (en) * | 1965-05-14 | 1969-09-30 | Gundlach Gmbh Aug | Device for producing refractory bodies and a method of producing such bodies |
US3815863A (en) * | 1972-06-13 | 1974-06-11 | F Andeweg | Collapsible flexible material candle mold |
FR2275289A1 (fr) * | 1974-06-18 | 1976-01-16 | Chambourdon Roger | Procede de fabrication d'un materiau alveolaire prefabrique, materiau obtenu et son application a la realisation d'elements prefabriques pour la construction |
JPS52128830A (en) * | 1976-04-21 | 1977-10-28 | Takaoka Kogyo Kk | Core for molding |
DE7733423U1 (de) * | 1977-10-29 | 1979-08-30 | Keramik-Consult Wolfgang Eckhoff, 5880 Luedenscheid | Vorrichtung zur formung von hohlkoerpern aus keramischen stoffen |
US4591472A (en) * | 1982-03-17 | 1986-05-27 | Keramik Holding Ag Laufen | Process for the preparation of blanks |
DD207516B1 (de) * | 1982-05-07 | 1986-03-26 | Ver Steinzeugwerke Bad Schmied | Vorrichtung zum pneumatischen pressen von keramischen hohlkoerpern |
JPS6233601A (ja) * | 1985-08-06 | 1987-02-13 | 株式会社イナックス | 排泥鋳込み成形方法 |
JPS6342803A (ja) * | 1986-08-08 | 1988-02-24 | 東陶機器株式会社 | 鋳込み成形法及び装置 |
ES2124136B1 (es) * | 1995-06-26 | 1999-11-16 | Juguetes Oliver S A | Metodo para conformar figuras de barro. |
US5858295A (en) * | 1996-12-30 | 1999-01-12 | Johnson & Johnson Professional, Inc. | Method of injection molding a part using an inflatable mold core |
-
2001
- 2001-06-22 DE DE2001130186 patent/DE10130186A1/de not_active Withdrawn
-
2002
- 2002-06-20 DE DE50212808T patent/DE50212808D1/de not_active Expired - Fee Related
- 2002-06-20 EP EP02747420A patent/EP1399304B1/de not_active Expired - Lifetime
- 2002-06-20 WO PCT/EP2002/006863 patent/WO2003000476A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO03000476A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011061593A1 (en) | 2009-11-17 | 2011-05-26 | Maprof Sas Di Renzo Moschini E C. | Method for manufacturing monolithic bodies by means of a casting or injection molding process |
US9126264B2 (en) | 2009-11-17 | 2015-09-08 | Freni Brembo S.P.A. | Method for manufacturing monolithic hollow bodies by means of a casting or injection moulding process |
Also Published As
Publication number | Publication date |
---|---|
WO2003000476A1 (de) | 2003-01-03 |
DE10130186A1 (de) | 2003-01-02 |
EP1399304B1 (de) | 2008-09-24 |
DE50212808D1 (de) | 2008-11-06 |
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