EP1399304B1 - Procede et dispositif de coulee en barbotine sous pression - Google Patents

Procede et dispositif de coulee en barbotine sous pression Download PDF

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Publication number
EP1399304B1
EP1399304B1 EP02747420A EP02747420A EP1399304B1 EP 1399304 B1 EP1399304 B1 EP 1399304B1 EP 02747420 A EP02747420 A EP 02747420A EP 02747420 A EP02747420 A EP 02747420A EP 1399304 B1 EP1399304 B1 EP 1399304B1
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EP
European Patent Office
Prior art keywords
hollow body
slip
body element
mould
inflatable
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.)
Expired - Lifetime
Application number
EP02747420A
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German (de)
English (en)
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EP1399304A1 (fr
Inventor
Josef Wagner
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Individual
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Individual
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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
    • 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 relates to a method for slip casting under pressure for the production of hollow ceramic material, as well as with an apparatus for carrying out the method for Schlickerg bankert under pressure to produce the aforementioned objects.
  • a mold assembly for producing hollow bodies of low melting point metal, wax, ceramic materials or plastic materials having a split outer shape and a core insert provided in the form of an inflated bag tightly sealingly connected to a support ring through which a pressurized fluid is introduced into the bag to keep it in its expanded state.
  • the split mold halves are brought together around the inflated bag to form a mold cavity into which a molten material is introduced.
  • the fluid is withdrawn from the bag, causing the bag to deflate and collapse in the support ring, thereby freeing the molded body from the core insert.
  • a pump is connected to the conduit leading away from the support ring for introducing and discharging a fluid into the bag.
  • pressure-slip slip When pouring such pressure-slip slip is introduced into a mold cavity and placed under pressure, for which purpose Schlicker Oberen and pressure medium lines are provided, which open into the mold cavity, which is enclosed by one or more moldings.
  • pressure oil for conventional pressure generation with piston pumps which comprises, for example, two mutually connected via a piston rod piston, one of which is pressurized oil and the other applies the appropriate pressure on the slurry, it can cause soiling in the to be produced ceramic goods and even in the mold cavity bounding walls of the mold or mold parts come through 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 hollow ceramic, which can overcome the described difficulties and also high-quality hollow ceramic, such as pitchers or the like, can be produced in an effective manner cost and simplified.
  • a method for slip casting under pressure for the production of hollow ceramic material is provided, filled in the slip into a mold cavity formed by a mold and under pressure to form a body for the Ceramic material is set.
  • This method is inventively characterized by the fact that after filling the mold cavity with slip an inflatable hollow body element of non-porous but flexible material is introduced into the slurry under immersion in the slurry, which then by a fluid pressure in the interior of the hollow body element like a balloon to pressurize the slurry inflated when the mold is closed.
  • mold slip filled with slip takes place separately from the slip filling with the aid of the balloon-like inflatable hollow body element, for which purpose a fluid pressure medium is introduced into the interior of the hollow body element when the mold is closed.
  • a pressureless Schlickerzu 1500system be used in which the slurry is conveyed only gravity assisted in the mold cavity.
  • 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-inflatable outer skin of the hollow body element comes into direct contact with the slip mass.
  • impairments caused by any contamination of the slip mass caused by the pressure medium and also in the area of the walls of the mold or molds delimiting the mold cavity can be effectively avoided, so that high-quality hollow ceramic material can be produced in an effective manner and with high ejection efficiency 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 no committee is to be feared in the ceramic material.
  • the Schlickermakerss aggren need not be emptied and cleaned during downtime, for example. As a result, the maintenance can be considerably reduced.
  • the inventive method allows that the inflatable hollow body element can be adapted in terms of its shape and / or shape of the ceramic material to be produced in each case also in terms of size. This is particularly of great advantage in the production of Hohlkeramikgut, such as pitchers or the like. Furthermore, in the case of wear, the hollow body member can be exchanged and replaced quickly and easily.
  • the fluid pressure in the interior of the hollow body member is generated by water and may be on the order of about 20 to about 40 bar. Since no fluid pressure medium prone to contamination is used, any difficulties associated therewith can be eliminated. Also, in this case, the pressurization can be controlled and controlled in a structurally simple manner and in the desired manner.
  • the hollow body element in the inflated state is introduced into the slurry to the desired position and then the fluid pressure in the interior of the hollow body element is preferably built gradually increasing .
  • the fluid pressure can be controlled in the process of the invention in time, and it is maintained until an at least partially solidified ceramic shards in the mold cavity has formed.
  • this ceramic shard has formed, and this has solidified so that it is transportable as such, then preferably gradually decreasing the fluid pressure in the interior of the hollow body member is degraded.
  • This degradation can also be controlled in a suitable manner in terms of time. Also, in all these control measures a respective vote on the ceramic material to be produced without difficulty, for example, on the basis of simple experiments possible.
  • the hollow body element is then removed from the mold cavity fluid pressureless after the body formation.
  • the so produced ceramic material according to the invention can then be removed in a suitable manner from the mold cavity and in a multi-part mold then the individual moldings can be separated from each other, so that the ceramic material thus formed is accessible for all further treatments and optionally transported to other treatment facilities can.
  • the inflatable hollow body element with a form closure part is motion-connected.
  • the inflatable hollow body element hitherto still open and filled with slurry mold cavity is sealed at the same time and that when the ceramic material has been formed in terms of its design in the mold cavity, the mold at the same time partially can be opened with the removal of the inflatable hollow body element.
  • an apparatus for carrying out the method for slip casting under pressure for the production of ceramic material, in particular hollow ceramic material which includes a mold cavity enclosing mold for Schlickergie H under pressure and a balloon-like by fluid pressure in the interior inflatable.
  • Hollow body element of non-porous, but flexible material which dipped into the filled into the mold cavity slip and taken out of this after the body formation in the deflated state, can be.
  • the balloon-inflated state the hollow body element generates a pressure on the slurry in the mold cavity, but the pressurizing medium comes neither in direct contact with the slurry nor with the boundary walls of the mold cavity.
  • the device according to the invention is structurally designed uncomplicated and allows a reliable operation.
  • the inflatable hollow body element is 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.
  • a rigid tube section as a holder, which introduces the fluid pressure medium into the interior of the hollow body.
  • This serving as a holder pipe section thus serves both for Fluiddruckmediumseintechnisch and holds at its free end reliably the inflatable hollow body element of non-porous, but flexible material.
  • the inflatable hollow body member is connected via the pipe section with a mold closure part and movable together with this for dipping and removing.
  • the Form cavity limiting form completely closed or at least partially reopened.
  • the slip in the mold cavity is not directly acted upon by a pressure medium, but that the pressurization takes place separately by means of an inflatable hollow body element after filling the mold cavity with slurry.
  • contamination of the mold and the ceramic material can be avoided, and in particular hollow ceramic articles with high quality can be produced in an universal manner, since the size, shape and shape of the inflatable hollow body element can be adapted to the particular requirements that exist the production of the desired Hohlkeramikgut are taken into account.
  • a discharge of the excess slip is readily possible by a corresponding turning of the mold after complete body formation and reduced pressure in the inflatable hollow body element.
  • the pressurization can be controlled sensitively by means of the inflatable hollow body element.
  • FIG. 1 is a generally designated 1 form shown, which is designed for example in several parts and may include individual moldings of the same and / or different materials.
  • an opening 3 is provided in an upper mold part 2.
  • the mold 1 encloses a Total designated 4 mold cavity, which is contoured and designed according to the ceramic material to be produced.
  • slip 7 is filled through the opening 3 in the mold cavity 4.
  • the filling of the mold cavity 4 with slurry 7 can also be done without pressure, if necessary, only by utilizing gravity.
  • the mold cavity 4 is at least partially filled with slurry 7, as is illustrated by a horizontal hatching.
  • a hollow body element 8 which is fastened to a pipe section 9 as a holder, expediently introduced into the slip 7 in the mold cavity 4 together with a mold closure part 10 in the uninflated state.
  • the hollow body member 8 is made of a non-porous but flexible material, and it can be inflated in a balloon-like manner by means of a suitable internal pressure.
  • FIG. 3 illustrates that preferably via the pipe section 9 of the interior of the hollow body member 8 is acted upon by a fluid pressure, which may amount to about 20 to about 40 bar.
  • the media used are all conventional print media into consideration, and in particular the use of water as a pressure medium in the inventive method is extremely useful.
  • this pressure acts on all sides on the outside of the hollow body member 8 on the surrounding slurry.
  • the most uniform possible pressurization is achieved.
  • the hollow body member 8 is gradually increased by means of the appropriate fluid medium with a corresponding internal pressure, so that the slurry 7 is more and more displaced until finally the final shape of the inner cavity of the ceramic material to be produced is reached.
  • the inflatable hollow body member 8 can be easily adapted to the particular requirements in terms of shape, size and material.
  • the hollow body member 8 is inflated in a balloon shape similar to the shape of a light bulb to form the inner cavity of the jug in a correspondingly contoured manner.
  • the device is then so long, for example, in the in FIG. 3 shown held state until a ceramic shards in the mold cavity 4 is formed by solidification.
  • a ceramic shard is at least solidified to the extent that it can be handled independently after removal from the mold 1 largely free of damage, and for example, to corresponding further processing facilities, such as a drying device, a burner and the like, can be further transported.
  • the inflatable hollow body member 8 is drained, ie, the internal fluid pressure in the hollow body member 8 is degraded, also preferably gradually decreasing.
  • the hollow body element 8 is then preferably moved out of the mold cavity 4 again together with the mold closure part 10, advantageously in such a way that the mold closure part 10 is also raised at least partially slightly or even completely.
  • the device then takes, for example, the in FIG. 1 state shown apart from the fact that now in the mold cavity 4, a self-solidified ceramic shards is formed, which surrounds a hollow interior in the example shown, so that it is, for example, a Hohlkeramikgut.
  • the excess slurry remaining in the mold cavity 4 can then be poured off via the opening 3, for example, or be discharged in another suitable manner, for example by gravity assistance. If the excess slurry 7 has been removed and discharged from the mold cavity 4 of the already formed Keramikscherbens, then the mold 1 can then be further and fully opened, that the corresponding associated mold parts of the mold 1 are separated from each other, so that the ceramic shards, for example, almost completely is set free and, for example, rests standing upright only on the ground on an associated molding of the mold. Now, the thus formed pottery shards can be removed from the mold 1 and conveyed to the appropriate aftertreatment devices.
  • the pressure medium for pressurizing the hollow body element 8 comes into contact neither with the slurry nor with the ends which delimit the mold cavity 4.
  • the Namely hollow body member 8 is made of a non-porous material, so that the pressurizing medium can not escape via the wall of the hollow body member 8 and diffuse, for example, in the slurry. Therefore, contaminations of the mold parts of the mold 1 and / or the slurry 7 and / or the ceramic chip formed therefrom can be effectively eliminated. Therefore eliminates maneuverable cleaning work of form 1 and the cause of rejects can be turned off.
  • the size, shape and material of the balloon-like inflatable hollow body member 8 can be easily adapted to the respective requirements, whereby the shape and the nature of the ceramic material to be produced are substantially influenced.
  • the filling of the mold 1 with slurry 7 is completely separate from the shaping of the ceramic chip in the mold cavity 4 using the inflatable hollow body element 8 realized, so that the Schlickerzu operationssystem can be chosen independently in terms of its design to the shape of the ceramic shards in the mold cavity 4.
  • the fluid pressure medium for inflating the hollow body member 8 can be selected.
  • the pressurizing medium for the inflatable hollow body member 8 can be selected in any suitable manner.
  • the number and the design of the mold parts of the mold 1 may change according to the ceramic material to be produced.

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  • 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)

Claims (10)

  1. Procédé de coulée de barbotine sous effet de pression pour la fabrication de pièces creuses en céramique, procédé suivant le quel une empreinte formée par un moule est remplie de barbotine et soumise à une surpression former la pâte pour la pièce en céramique, caractérisé en ce qu'une fois l'empreinte remplie de barbotine, un élément gonflable en forme de corps creux en une matière non poreuse, mais élastique, est introduit en l'immergeant dans la barbotine, puis gonflé par la pression d'un fluide à l'intérieur, afin de mettre la barbotine sous pression à moule fermé.
  2. Procédé suivant la revendication 1, caractérisé en ce que la pression est générée par de l'eau.
  3. Procédé suivant la revendication 1 ou 2, caractérisé en ce que l'élément en forme de corps creux est introduit en état non gonflé dans la barbotine jusqu'à la position souhaitée, puis la pression du fluide est montée, de préférence progressivement, à l'intérieur de l'élément en forme de corps creux.
  4. Procédé suivant les revendications 1 à 3, caractérisé en ce qu'après la formation de la pâte à partir de la barbotine dans l'empreinte, la pression du fluide dans l'espace intérieur de l'élément en forme de corps creux est également progressivement réduite.
  5. Procédé suivant une des revendications 1 à 4, caractérisé en ce qu'après la formation de la pâte, l'élément en forme de corps creux est enlevé de l'empreinte sans pression du fluide.
  6. Procédé suivant une des revendications 1 à 5, caractérisé en ce que l'élément en forme de corps creux gonflable est relié de manière mobile à une pièce de fermeture du moule.
  7. Dispositif d'exécution du procédé de coulée de barbotine sous effet de pression pour la fabrication de pièces creuses en céramique suivant la revendication 1, dispositif qui comprend un moule (1) embrassant une empreinte (4) pour la coulée de barbotine sous effet de pression, un élément en forme de corps creux en une matière non poreuse, élastique pouvant être gonflé à la manière d'un ballon au moyen de la pression d'un fluide dans l'espace intérieur et une conduite de barbotine séparée (6) pour remplir de barbotine (7) l'empreinte (4) encore partiellement ouverte, sans immerger l'élément en forme de corps creux, lequel est conçu de manière qu'il puisse être immergé dans la barbotine introduite dans l'empreinte et enlevé en état dégonflé, après la formation de la pâte.
  8. Dispositif suivant la revendication 7, caractérisé en ce que l'élément gonflable en forme de corps creux (8) est fixé à une extrémité libre d'un segment de tube rigide (9) faisant fonction de support, à travers lequel le milieu de pression fluide est introduit dans l'espace intérieur de l'élément en forme de corps creux (8).
  9. Dispositif suivant la revendication 8, caractérisé en ce que l'élément gonflable en forme de corps creux (8) est relié, via le segment de tube (9), à une pièce de fermeture du moule (10), avec laquelle il peut être déplacé pour permettre l'immersion et l'enlèvement.
  10. Dispositif suivant la revendication 9, caractérisé en ce que l'amenée de barbotine à l'empreinte (4) a lieu, sans pression, via la conduite de barbotine (6).
EP02747420A 2001-06-22 2002-06-20 Procede et dispositif de coulee en barbotine sous pression Expired - Lifetime EP1399304B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2001130186 DE10130186A1 (de) 2001-06-22 2001-06-22 Verfahren und Vorrichtung zum Schlickergießen unter Druckeinwirkung
DE10130186 2001-06-22
PCT/EP2002/006863 WO2003000476A1 (fr) 2001-06-22 2002-06-20 Procede et dispositif de coulee en barbotine sous pression

Publications (2)

Publication Number Publication Date
EP1399304A1 EP1399304A1 (fr) 2004-03-24
EP1399304B1 true EP1399304B1 (fr) 2008-09-24

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EP02747420A Expired - Lifetime EP1399304B1 (fr) 2001-06-22 2002-06-20 Procede et dispositif de coulee en barbotine sous pression

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EP (1) EP1399304B1 (fr)
DE (2) DE10130186A1 (fr)
WO (1) WO2003000476A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106426514A (zh) * 2016-08-19 2017-02-22 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
DE102020100414A1 (de) 2020-01-10 2021-07-15 Lippert Gmbh & Co. Kg Batteriedruckguss für keramische Hohlkörper

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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
IT1396481B1 (it) 2009-11-17 2012-12-14 Maprof Sas Di Renzo Moschini E C Metodo di fabbricazione di corpi cavi monolitici mediante un processo di colata o di stampaggio ad iniezione.
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
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
DE102022115107A1 (de) * 2022-06-15 2023-12-21 Sama Maschinenbau Gmbh Druckgießform

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106426514A (zh) * 2016-08-19 2017-02-22 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
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
DE102020100414A1 (de) 2020-01-10 2021-07-15 Lippert Gmbh & Co. Kg Batteriedruckguss für keramische Hohlkörper
EP3851262A1 (fr) 2020-01-10 2021-07-21 Lippert GmbH & Co. KG Coulée sous pression de batterie pour corps creux en céramique

Also Published As

Publication number Publication date
DE10130186A1 (de) 2003-01-02
DE50212808D1 (de) 2008-11-06
WO2003000476A1 (fr) 2003-01-03
EP1399304A1 (fr) 2004-03-24

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