EP0448810A2 - Slip-casting process for the manufacture of a ceramic product - Google Patents

Slip-casting process for the manufacture of a ceramic product Download PDF

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Publication number
EP0448810A2
EP0448810A2 EP90124507A EP90124507A EP0448810A2 EP 0448810 A2 EP0448810 A2 EP 0448810A2 EP 90124507 A EP90124507 A EP 90124507A EP 90124507 A EP90124507 A EP 90124507A EP 0448810 A2 EP0448810 A2 EP 0448810A2
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EP
European Patent Office
Prior art keywords
ceramic component
machining
external
slip
carried out
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.)
Withdrawn
Application number
EP90124507A
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German (de)
French (fr)
Other versions
EP0448810A3 (en
Inventor
Johannes Dipl.-Ing. Seyer
Bernhard Dr. Freudenberg
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Bayer AG
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Bayer AG
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Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP0448810A2 publication Critical patent/EP0448810A2/en
Publication of EP0448810A3 publication Critical patent/EP0448810A3/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—
    • 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
    • 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
    • B28B11/12—Apparatus or processes for treating or working the shaped or preshaped articles for removing parts of the articles by cutting
    • 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/92—Methods or apparatus for treating or reshaping
    • 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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/92—Methods or apparatus for treating or reshaping
    • B28B21/96—Methods or apparatus for treating or reshaping for smoothing, roughening, corrugating or for removing burr
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing

Abstract

The invention relates to a process for producing a slip-cast ceramic product having an interrupted inner chamfer, the volume to be removed from the blank being transferred to the outside and the machining to achieve the geometry of the ceramic product being achieved by working the outside.

Description

Die vorliegende Erfindung betrifft ein schlickergegossenes keramisches Bauteil mit einer unterbrochenen Innenfase sowie ein Verfahren zu seiner Herstellung.The present invention relates to a slip-cast ceramic component with an interrupted inner chamfer and a method for its production.

Der Schlickerguß ist zur Massenfertigung von komplizierten, insbesondere hintergriffigen Geometrien geeignet. Allerdings liefert er in der Regel eine konstante Wandstärke. Definierte Wandstärkeabstufungen innerhalb eines Hohlgußteils oder Fasen an demselbigen lassen sich mit dieser Methode der Massenfertigung nicht realisieren.The slip casting is suitable for the mass production of complicated, especially behind-grip geometries. However, it usually provides a constant wall thickness. Defined wall thickness gradations within a hollow casting or chamfers on the same cannot be achieved with this method of mass production.

Um das Problem zu veranschaulichen, sei das Beispiel des Distanzringes angeführt, welcher zur Positionierung der wabenförmigen Katalysatorblöcke im Abgasstrang dient. Stirnseitig ist das Teil mit einer Innenfase (2) ausgestattet, Fig. 1. Diese ist gegebenenfalls an mehreren Stellen durch einen Vorsprung (1) unterbrochen. Entsprechende Distanzringe werden durch Schleifen der Innenkontur erhalten.To illustrate the problem, the example of the spacer ring is used, which is used to position the honeycomb-shaped catalyst blocks in the exhaust system. At the end, the part is equipped with an inner chamfer (2), Fig. 1. This is possibly interrupted at several points by a projection (1). Corresponding spacer rings are obtained by grinding the inner contour.

Der Schleifvorgang muß dabei an den nach innen gerichteten Vorsprüngen unterbrochen werden. Dies bedingt, daß die Fase mit einer aufwendigen bahngesteuerten Innenschleifmaschine herausgearbeitet werden muß.The grinding process must be interrupted on the inward projections. This means that the bevel has to be worked out with a complex path-controlled internal grinding machine.

Aufgabe dieser Erfindung ist die Bereitstellung entsprechender schlickergegossener keramischer Bauteile, die nach einem ökonomischen Verfahren erhältlich sind.The object of this invention is to provide corresponding slip-cast ceramic components which can be obtained by an economical process.

Überraschenderweise wurde nun gefunden, daß diese Anforderungen erfüllt werden durch ein schlickergegossenes Bauteil, bei dem die gegebenenfalls unterbrochene Innenfase dadurch erreicht wird, daß am Rohling das zu entfernende Volumen nach außen gelegt wird, und das Spanen zum Erreichen der Endgeometrie des keramischen Bauteils durch Außenbearbeitung erzielt wird.Surprisingly, it has now been found that these requirements are met by a slip-cast component, in which the internal chamfer, which may be interrupted, is achieved by placing the volume to be removed on the blank, and the machining to achieve the final geometry of the ceramic component is achieved by external machining becomes.

In der Fig. 1 ist ein nach herkömmlicher Methode erhaltener Distanzring schematisch dargestellt, in Fig. 2 das erfindungsgemäße Bauteil. Hierbei bedeuten (1) den Vorsprung der Innenfase, (2) die Fase und (3) das zu entfernende Volumen. Bevorzugt ist das erfindungsgemäße keramische Bauteil ein Distanzring für den Katalysatoreinsatz mit variabler Wandstärke und gegebenenfalls unterbrochener Innenfase.In Fig. 1, a spacer ring obtained by a conventional method is shown schematically, in Fig. 2, the component according to the invention. Here, (1) mean the protrusion of the inner chamfer, (2) the chamfer and (3) the volume to be removed. The ceramic component according to the invention is preferably a spacer ring for the catalyst insert with variable wall thickness and possibly an interrupted inner chamfer.

Die Erfindung bezieht sich jedoch nicht nur auf rotationssymmetrische Teile. Das erfindungsgemäße Konzept läßt sich auch ohne weiteres auf nicht-rotationssymmetrische Teile mit elliptischen oder komplizierteren Geometrien übertragen.However, the invention relates not only to rotationally symmetrical parts. The concept according to the invention can also be easily transferred to non-rotationally symmetrical parts with elliptical or more complicated geometries.

Die erfindungsgemäß vorzunehmende spanende Bearbeitung kann vorteilhaft sowohl am Rohling als auch am vorgesinterten oder fertig gebrannten Sinterkörper vorgenommen werden. Bei Rotationssymmetrischen keramischen Bauteilen wird dann bevorzugt das Außenbearbeiten durch Außendrehen oder Außenrundschleifen vorgenommen. Im Falle nicht-rotationssymmetrischer Teile bieten sich andere Bearbeitungsmethoden, wie z.B. das bahngesteuerte Außenschleifen an.The machining to be carried out according to the invention can advantageously be carried out both on the blank and on the pre-sintered or fully fired sintered body. In the case of rotationally symmetrical ceramic components, external machining is then preferably carried out by external turning or external cylindrical grinding. In the case of non-rotationally symmetrical parts, other processing methods are available, e.g. the path-controlled external grinding.

Gegenstand dieser Erfindung ist auch ein Verfahren zur Herstellung eines schlickergegossenen keramischen Bauteils mit einer unterbrochenen Innenfase durch spanende Bearbeitung des Bauteils, welches dadurch erhältlich ist, daß bei der Herstellung des keramischen Bauteils vor dem Spanen am Rohling das zu entfernende Volumen nach außen gelegt und das Spanen zum Erreichen der Geometrie des keramischen Bauteils durch Außenbearbeitung erzielt wurde.This invention also relates to a method for producing a slip-cast ceramic component with an interrupted inner chamfer by machining the component, which is obtainable by placing the volume to be removed on the outside and the chip removal during the production of the ceramic component on the blank to achieve the geometry of the ceramic component was achieved by external machining.

Der Schleifvorgang wird außen nicht mehr durch die Vorsprünge unterbrochen, was zu einer deutlichen Verkürzung der Taktzeiten führt. Weiterhin ist beim Außenschleifen der Schleifenscheiben- und Spindeldurchmesser nicht derartig begrenzt wie beim Innenschleifen, d.h. es können optimale Schleifscheibengrößen eingesetzt werden.The grinding process is no longer interrupted by the protrusions on the outside, which leads to a significant reduction in cycle times. Furthermore, the grinding wheel and spindle diameter for external grinding is not as limited as for internal grinding, ie optimal grinding wheel sizes can be used.

Schließlich ist es möglich, mehrere Ringe in einer Aufspannung zu fassen und gleichzeitig bzw. nacheinander zu bearbeiten.Finally, it is possible to grasp several rings in one setting and to process them simultaneously or in succession.

Vorzugsweise handelt es sich beim erfindungsgemäßen keramischen Bauteil um einen Distanzring für den Katalysatoreinsatz mit variabler Wandstärke und gegebenenfalls unterbrochener Innenfase. Die spanende Bearbeitung kann dabei vorteilhaft sowohl am Rohling als auch am vorgesinterten oder gebrannten Sinterkörper vorgenommen werden. Im Falle von rotationssymmetrischen Bauteilen wird das Außenbearbeiten vorteilhafterweise durch Außendrehen oder Außenrundschleifen erzielt. Im Falle nicht-rotationssymmetrischer Teile mit elliptischen oder komplizierteren Geometrien kann das Außenbearbeiten durch andere Methoden, z.B. durch bahngesteuertes Außenschleifen erfolgen.The ceramic component according to the invention is preferably a spacer ring for the catalyst insert with variable wall thickness and possibly an interrupted inner chamfer. The machining can advantageously be carried out both on the blank and on the pre-sintered or fired sintered body. In the case of rotationally symmetrical components, the external machining is advantageously achieved by external turning or external cylindrical grinding. In the case of non-rotationally symmetrical parts with elliptical or more complicated geometries, the external machining can be carried out by other methods, for example by path-controlled external grinding.

Beispiel 1: Keramischer Distanzring mit Innenfase Example 1 : Ceramic spacer ring with inner chamfer

Die konstruktionsseitig geforderte Geometrie ist der Figur 3 zu entnehmen.The geometry required by the construction can be seen in FIG. 3.

Die Innenfase wird vorteilhaft entsprechend Figur 4 gefertigt.The inner bevel is advantageously produced in accordance with FIG. 4.

Die Vorteile sind: Außenschleifen mit beliebigem Scheibendurchmesser; es können steife Spindeln eingesetzt werden, die mehrere Schleifscheiben gleichzeitig aufnehmen können, um damit mehrere Bauteile in einem Arbeitsgang zu bearbeiten; es ergibt sich auch die Möglichkeit, den Schleif- und den Trennvorgang zu kombinieren, falls der Formgebungsprozeß eine Ringkombination liefert.The advantages are: external grinding with any disc diameter; rigid spindles can be used, which can hold several grinding wheels at the same time, in order to machine several components in one operation; there is also the possibility of combining the grinding and the cutting process if the shaping process provides a ring combination.

Beispiel 2: Keramischer Distanzring mit unterbrochener Innenfase Example 2 : Ceramic spacer ring with interrupted inner chamfer

Die konstruktionsseitig geforderte Geometrie entspricht Figur 1.The geometry required by the construction corresponds to FIG. 1.

Die unterbrochene Innenfase wird vorteilhaft entsprechend Figur 5 gefertigt.The interrupted inner bevel is advantageously produced in accordance with FIG. 5.

Durch diese Geometrieänderung läßt sich die aufwendige Innenbearbeitung von Einzelringen oder von Ringkombinationen vermeiden.This change in geometry avoids the complex internal machining of individual rings or of ring combinations.

Claims (10)

Schlickergegossenes keramisches Bauteil mit einer Innenfase, dadurch erhältlich, daß bei der Herstellung des keramischen Bauteils, d.h. am Rohling das zu entfernende Volumen nach außen gelegt und das Spanen zum Erreichen der Geometrie des keramischen Bauteils durch Außenbearbeitung erzielt wurde.Slip-cast ceramic component with an internal chamfer, obtainable by the fact that in the manufacture of the ceramic component, i.e. the volume to be removed was placed on the blank and the machining to achieve the geometry of the ceramic component was achieved by external machining. Keramisches Bauteil gemäß Anspruch 1, dadurch gekennzeichnet, daß die Innenfase unterbrochen ist.Ceramic component according to claim 1, characterized in that the inner chamfer is interrupted. Keramisches Bauteil gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß das keramische Bauteil ein Distanzring für den Katalysatoreinsatz mit variabler Wandstärke und Innenfase ist.Ceramic component according to one of claims 1 or 2, characterized in that the ceramic component is a spacer ring for the catalyst insert with variable wall thickness and inner chamfer. Keramisches Bauteil gemäß einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die spanende Bearbeitung am Rohling vorgenommen wurde.Ceramic component according to one or more of claims 1 to 3, characterized in that the machining was carried out on the blank. Keramisches Bauteil gemäß einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die spanende Behandlung am vorgesinterten oder fertig gebrannten Sinterkörper vorgenommen wurde.Ceramic component according to one or more of claims 1 to 3, characterized in that the machining treatment was carried out on the pre-sintered or finished fired sintered body. Keramisches Bauteil gemäß einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Außenbearbeiten durch Außendrehen oder Außenrundschleifen vorgenommen wird.Ceramic component according to one or more of claims 1 to 5, characterized in that the external machining is carried out by external turning or external cylindrical grinding. Verfahren zur Herstellung eines schlickergegossenen keramischen Bauteils gemäß eines oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß am Rohling das zu entfernende Volumen nach außen gelegt und das Spanen zum Erreichen der Geometrie des keramischen Bauteils durch Außenbearbeiten erzielt wird.A process for producing a slip-cast ceramic component according to one or more of claims 1 to 6, characterized in that the volume to be removed is placed on the blank and the machining to achieve the geometry of the ceramic component is achieved by external machining. Verfahren gemäß Anspruch 7, dadurch gekennzeichnet, daß das keramische Bauteil ein Distanzring für den Katalysatoreinsatz mit variabler Wandstärke und unterbrochener Innenfase ist.Method according to claim 7, characterized in that the ceramic component is a spacer ring for the catalyst insert with variable wall thickness and interrupted inner chamfer. Verfahren gemäß einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, daß die spanende Bearbeitung am Rohling vorgenommen wird.Method according to one of claims 7 or 8, characterized in that the machining is carried out on the blank. Verfahren gemäß einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, daß die spanende Behandlung am vorgesinteren oder fertig gebrannten Sinterkörper vorgenommen wird.Method according to one of claims 7 or 8, characterized in that the cutting treatment is carried out on the presintered or finished fired sintered body.
EP19900124507 1990-03-29 1990-12-18 Ceramic product formed by slip-casting and process for its manufacture Withdrawn EP0448810A3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4010092 1990-03-29
DE4010092A DE4010092A1 (en) 1990-03-29 1990-03-29 SLIP-CASTED CERAMIC COMPONENT AND METHOD FOR THE PRODUCTION THEREOF
DE9003681U DE9003681U1 (en) 1990-03-29 1990-03-29 Slip-cast ceramic component

Publications (2)

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EP0448810A2 true EP0448810A2 (en) 1991-10-02
EP0448810A3 EP0448810A3 (en) 1991-12-18

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EP19900124507 Withdrawn EP0448810A3 (en) 1990-03-29 1990-12-18 Ceramic product formed by slip-casting and process for its manufacture

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US (1) US5185113A (en)
EP (1) EP0448810A3 (en)
JP (1) JPH04221607A (en)
DE (2) DE4010092A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4203639A1 (en) * 1992-02-08 1993-08-12 Hoechst Ceram Tec Ag Solid cleaning component production method
DE19710230A1 (en) * 1997-03-12 1998-09-17 Biedermann Motech Gmbh Tubular fiber material and method for producing a prosthesis socket from such a material
US9089992B2 (en) 2007-04-30 2015-07-28 Corning Incorporated Methods and apparatus for making honeycomb structures with chamfered after-applied akin and honeycomb structures produced thereby
US20110126973A1 (en) * 2009-11-30 2011-06-02 Andrewlavage Jr Edward Francis Apparatus And Method For Manufacturing A Honeycomb Article

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1457646A (en) * 1965-09-22 1966-01-24 Materiel Ceramique Moderne Device for the mechanical execution of interlocking profiles or the like on ceramic or other articles
JPH01188303A (en) * 1988-01-22 1989-07-27 Toppan Printing Co Ltd Manufacture of earthenware
EP0387422A1 (en) * 1989-03-17 1990-09-19 Firma J. Eberspächer Apparatus for catalytic or other purification of exhaust gases of internal combustion engines, with two exhaust gas treating bodies and a protection ring between them
DE9010438U1 (en) * 1990-06-02 1990-10-04 Heinrich Gillet Gmbh & Co Kg, 6732 Edenkoben, De

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Publication number Priority date Publication date Assignee Title
US4510191A (en) * 1982-09-30 1985-04-09 Toshiba Ceramics Co., Ltd. Casting nozzle
US4714640A (en) * 1986-02-04 1987-12-22 General Electric Co. (Alumina electrically conductive) guide article
US4773149A (en) * 1987-09-14 1988-09-27 Gte Products Corporation Method of making ceramic tube for high temperature use

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1457646A (en) * 1965-09-22 1966-01-24 Materiel Ceramique Moderne Device for the mechanical execution of interlocking profiles or the like on ceramic or other articles
JPH01188303A (en) * 1988-01-22 1989-07-27 Toppan Printing Co Ltd Manufacture of earthenware
EP0387422A1 (en) * 1989-03-17 1990-09-19 Firma J. Eberspächer Apparatus for catalytic or other purification of exhaust gases of internal combustion engines, with two exhaust gas treating bodies and a protection ring between them
DE9010438U1 (en) * 1990-06-02 1990-10-04 Heinrich Gillet Gmbh & Co Kg, 6732 Edenkoben, De

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 477 (M-885)(3825) 27. Oktober 1989 & JP-A-1 188 303 ( TOPPAN PRINTING CO LTD ) 27. Juli 1989 *

Also Published As

Publication number Publication date
DE9003681U1 (en) 1990-07-05
DE4010092C2 (en) 1992-06-11
US5185113A (en) 1993-02-09
DE4010092A1 (en) 1991-10-02
EP0448810A3 (en) 1991-12-18
JPH04221607A (en) 1992-08-12

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