[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0670207B1 - Dispositif pour la fabrication d'éléments cylindriques tubulaires - Google Patents

Dispositif pour la fabrication d'éléments cylindriques tubulaires Download PDF

Info

Publication number
EP0670207B1
EP0670207B1 EP95102778A EP95102778A EP0670207B1 EP 0670207 B1 EP0670207 B1 EP 0670207B1 EP 95102778 A EP95102778 A EP 95102778A EP 95102778 A EP95102778 A EP 95102778A EP 0670207 B1 EP0670207 B1 EP 0670207B1
Authority
EP
European Patent Office
Prior art keywords
steel
molding
set forth
mandrel
ring
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
EP95102778A
Other languages
German (de)
English (en)
Other versions
EP0670207A1 (fr
Inventor
Klaus Dipl.-Ing. Strobel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0670207A1 publication Critical patent/EP0670207A1/fr
Application granted granted Critical
Publication of EP0670207B1 publication Critical patent/EP0670207B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/18—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using expansible or retractable mould or core elements
    • 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
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/36—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means applying fluid pressure or vacuum to the material

Definitions

  • the invention relates to a device for Production of at least approximately hollow cylindrical Products, especially thin-walled pipes, made of ceramic, finely divided materials through isostatic Pressing, in which within a hollow cylindrical, isostatic pressure pot a mold cavity for that too pressing product between an axial, vertically extendable Steel mandrel and one concentrically arranged and hollow cylindrical shaping membrane made of rubber-elastic Material is formed, which shaping membrane is clamped at both ends and to the pressure pot towards one acted upon by a hydraulic pressure source Delimits the pressure space.
  • Such a device is from DE-A-28 25 611 known.
  • Ceramic Pipes are made that are relatively thin, however often have insufficient dimensional accuracy and which has a burnout safety of over 1000 ° C of the pipe must have. At the same time, it must be absolutely gastight before and after the burnout process according to DIN 18 160 part 6 and extensive vapor diffusion security be available.
  • the approximately 35% imaginative, i.e. plastic substance, e.g. Clay and about 65% non-figurative substance, e.g. Chamotte exhibit.
  • an internal steel mandrel is provided at the bottom End a protruding edge and a surrounding, slightly higher annular insert made of rubber or Has plastic, which as the shaping insert forms the lower end of the mold cavity.
  • the top one The mold cavity is also closed ring-shaped insert on a heel of the steel mandrel rests and also to shape the upper Front of the product to be molded.
  • the top The end of the steel mandrel is from one together with The upper insert is surrounded by a removable upper table after opening the upper end of the mold cavity releases the ceramic mass to be pressed in fill the mold cavity.
  • the present Invention the object of a press device to create an optimally dimensionally stable Manufacture of ceramic products is possible, i.e. a true-to-contour pressing without the need for a mechanical finishing. This is also supposed to be possible the pressed body during the pressing process to be provided with permanent and true-to-size contours.
  • the invention provides that the annular gap above the mold cavity between Pressure pot and steel mandrel by means of a cylindrical, Lockable steel ring that can be retracted and extended vertically and is limited and that the annular gap below of the mold cavity between the pressure pot and Steel mandrel by means of a conical, vertically in and out extendable steel ring can be locked and limited and that after isostatic pressing into the mold cavity introduced ceramic mass of the steel mandrel together with the lower conical steel ring and the Completely pressed product can be extended vertically downwards is, the conical immediately after the narrowest point Extension enables demolding.
  • the ones adjacent to the mold cavity can be used End faces of the steel rings as shaping elements be trained.
  • end faces the steel rings are stepped in opposite directions are offset to form a tongue and groove connection for adjoining tubular products.
  • the lower steel ring should be used for the shaping the groove and the upper steel ring for shaping the Spring be formed because of the suspension of the Mass would be destroyed in the pressure reduction the spring ..
  • the shaping membrane is expediently on its Outer circumference of a perforated one Support tube surrounded by the top and bottom of hook-shaped approaches that the effect of sealing lips have encompassed the shaping membrane.
  • the shaping membrane can additionally on her Inner surface to be contoured, this contouring from longitudinal parallel ribs or grooves can exist to create a finned tube.
  • the upper hollow cylindrical steel ring is convenient connected to the top table of the device and extendable together with this.
  • a conically tapering can be in this steel ring Be used in the ring in the shape of a cone tapered head of the steel mandrel is guided.
  • the lower steel ring is expediently at least a graded reduction in diameter of the Steel mandrel attached and together with the steel mandrel extendable downwards.
  • the steel mandrel in its upper area at least one radially extendable Driver pin, which after extending the upper metal ring the gap between mandrel and pressure pot interspersed and when pulling out the steel mandrel takes the finished product with them below.
  • the pressing device on the outside a hollow cylindrical, isostatic Pressure pot 1 on.
  • This pressure pot 1 encloses the inside a pressure chamber 2, in the one with openings 3 provided support tube 4 is inserted.
  • this support tube 4 On the inner circumference this support tube 4 is the actual, also hollow cylindrical shaping membrane 5 made of an elastic Material.
  • This membrane 5 encompasses the top and lower end with hook-shaped lugs 6 and 7 that Support tube 4 and is encompassing the membrane ends Rings 8 and 9 fixed against the pressure pot 1.
  • Axial in the pressure pot 1 is a steel mandrel 11 as the inside Shaping element used between his Outer surface and the inner surface of the molding membrane 5 the actual mold cavity 12 for that to be manufactured Product encloses.
  • This mold cavity 12 settles in the upper area practically over the effective length of the shaping membrane 5 beyond and over the entire length of the pressure pot 1 as an annular gap of approximately the same width as that of the Mold cavity 12 continues.
  • the mold cavity faces the narrowest Set up a conical extension so that the Remove the mandrel with the pressed tube only one if possible small resistance must be overcome.
  • the upper annular gap is cylindrical Steel ring 13, the one with the removable upper table 14 is connected, lockable during the Annular gap below the mold cavity 12 with a Steel ring 15 is closed, with the down extractable mandrel 11 is connected and by this is taken away.
  • Fig. 2 is in particular on an enlarged scale shown upper and lower area of the pressing device.
  • Shaping elements 16 and 17 are formed, for example a tongue and groove connection for connecting To form tubes. It is advisable when the lower shaping member 17 to form the Groove and the upper shaping element 16 to form the Serve spring while stepping opposite each other are discontinued.
  • the lower steel ring 15 is shrunk onto the steel mandrel 11 and form-fitting over several step-shaped Indentations 20, 21 and 23 connected to when pulling out of the steel mandrel 11 safely taken down by this to become.
  • the shaping elements 16 and 17 also the corresponding ones Contours in the end faces of the product to be pressed embossed.
  • the pressure chamber 2 relieved again, so that the shaping membrane 5 in returns to its original position, moving away from pressed product 26, for example a ceramic tube, away.
  • pressed product 26 for example a ceramic tube
  • the process is carried out by a vacuum source supports, so that an absolute concern of the membrane to the support tube and the filling space is always accurate has the same volume.
  • the pressed tube will also have restoring forces 26 loosen something from the steel mandrel 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Powder Metallurgy (AREA)

Claims (11)

  1. Appareil pour la fabrication de produits au moins approximativement cylindriques creux, en particulier des tubes à paroi mince en matériau céramique à particules fines, par pressage isostatique, dans lequel, à l'intérieur d'un pot cylindrique creux (1) sous pression isostatique, une cavité de moule (12) pour le produit à presser (26) est définie entre un mandrin en acier (11) susceptible d'être déployé axialement verticalement, et une membrane de formage (5) cylindrique creuse en matériau présentant l'élasticité du caoutchouc, laquelle est agencée de manière concentrique, ladite membrane de formage (5) étant enserrée aux deux extrémités et étant délimitée vis-à-vis du pot sous pression (1) par une chambre sous pression susceptible d'être alimentée depuis une source de pression hydraulique (24), caractérisé en ce que l'intervalle annulaire au-dessus de la cavité de formage (12) entre le pot sous pression (1) et le mandrin en acier (11) peut être obturé et délimité au moyen d'une bague en acier cylindrique (13) susceptible d'être déployée et rétractée verticalement, et en ce que l'intervalle annulaire au-dessous de la cavité de formage (12) entre le pot sous pression (1) et le mandrin en acier (11) peut être obturé et délimité au moyen d'une bague en acier conique (15) susceptible d'être déployée et rétractée verticalement, et en ce que, après pressage hydrostatique de la masse céramique introduite dans la cavité de formage (12), le mandrin en acier (11) peut être déployé verticalement vers le bas ensemble avec la bague en acier conique inférieure (15) ainsi qu'avec le produit pressé fini (26), et immédiatement après l'emplacement le plus étroit (32) l'élargissement conique permet le démoulage.
  2. Appareil selon la revendication 1, caractérisé en ce que les surfaces frontales (16, 17), adjacentes à la cavité de formage (12), des bagues en acier (13, 15) sont réalisées comme des éléments de formage.
  3. Appareil selon la revendication 2, caractérisé en ce que les surfaces frontales (16, 17) des bagues en acier (13, 15) sont en retrait en forme de gradins d'une manière mutuellement opposée pour former une liaison à languette-et-rainure, pour des produits tubulaires qui se raccordent les uns aux autres.
  4. Appareil selon la revendication 3, caractérisé en ce que la bague en acier inférieure (15) est réalisée pour conformer la rainure, et la bague en acier supérieure (13) est réalisée pour conformer la languette.
  5. Appareil selon la revendication 1, caractérisé en ce que la membrane de formage (5) est entourée sur sa périphérie extérieure par un tube de soutien (4) pourvu de traversées, lequel est entouré à l'extrémité supérieure et à l'extrémité inférieure par des talons (6, 7) en forme de crochets de la membrane de formage (5).
  6. Appareil selon l'une ou l'autre des revendications 1 et 5, caractérisé en ce que la membrane de formage (5) présente des contours sur sa surface intérieure.
  7. Appareil selon la revendication 6, caractérisé en ce que les contours de la surface intérieure de la membrane de formage (5) sont constitués de nervures ou de rainures parallèles qui s'étendent longitudinalement.
  8. Appareil selon la revendication 1, caractérisé en ce que la bague en acier cylindrique creuse supérieure (13) est reliée à la table supérieure (14) de l'appareil et peut être déployée vers le haut conjointement avec celle-ci.
  9. Appareil selon la revendication 8, caractérisé en ce que qu'une bague conique (18) est mise en place dans la bague en acier supérieure (13), et en ce que la tête de forme conique (19) du mandrin en acier (11) est guidée dans ladite bague.
  10. Appareil selon la revendication 1, caractérisé en ce que la bague en acier inférieure (15) est posée sur au moins un rétreint en gradins (20, 21, 22) du mandrin en acier (11), et est susceptible d'être déployée vers le bas en coopération de formes conjointement avec le mandrin en acier (11).
  11. Appareil selon la revendication 1, caractérisé en ce que le mandrin en acier (11) comporte dans sa région supérieure au moins une tige d'entraínement (27) susceptible d'être déployée radialement, laquelle traverse l'intervalle devenu libre après le déploiement de la bague métallique supérieure (13), et entraíne vers le bas le produit fini (26) lors du déploiement du mandrin en acier (11).
EP95102778A 1994-03-04 1995-02-27 Dispositif pour la fabrication d'éléments cylindriques tubulaires Expired - Lifetime EP0670207B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4407299 1994-03-04
DE4407299A DE4407299C1 (de) 1994-03-04 1994-03-04 Vorrichtung zur Herstellung von hohlzylindrischen Produkten

Publications (2)

Publication Number Publication Date
EP0670207A1 EP0670207A1 (fr) 1995-09-06
EP0670207B1 true EP0670207B1 (fr) 1998-09-09

Family

ID=6511907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95102778A Expired - Lifetime EP0670207B1 (fr) 1994-03-04 1995-02-27 Dispositif pour la fabrication d'éléments cylindriques tubulaires

Country Status (4)

Country Link
EP (1) EP0670207B1 (fr)
AT (1) ATE170794T1 (fr)
DE (2) DE4407299C1 (fr)
ES (1) ES2123169T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4444774C1 (de) * 1994-12-15 1996-03-07 Klaus Dipl Ing Strobel Verfahren und Vorrichtung zur Herstellung von keramischen Produkten
DE19547775C1 (de) 1995-12-20 1997-07-31 Klaus Dipl Ing Strobel Vorrichtung zur Herstellung von Muffenrohr-Formlingen und unter Verwendung der Vorrichtung hergestellter Muffenrohr-Formling
FR2757099B1 (fr) * 1997-12-15 1999-07-30 Ceramiques Tech Soc D Outillage et procede de production de tubes en ceramique a l'aide de cet outillage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172153A (en) * 1961-10-11 1965-03-09 David G Loomis Apparatus for molding powdered materials
US3193900A (en) * 1963-09-30 1965-07-13 Pacific Clay Products Apparatus for manufacturing clay pipe
SE322874B (fr) * 1966-12-27 1970-04-20 Asea Ab

Also Published As

Publication number Publication date
DE59503475D1 (de) 1998-10-15
ES2123169T3 (es) 1999-01-01
EP0670207A1 (fr) 1995-09-06
ATE170794T1 (de) 1998-09-15
DE4407299C1 (de) 1995-05-11

Similar Documents

Publication Publication Date Title
DE68910372T2 (de) Vorrichtung zum Vakuumformen.
EP3253567B1 (fr) Presse à poudre présentant une infrastructure conique
CH617368A5 (en) Method for the production of a workpiece by extrusion, application of the method and an apparatus for carrying out the method
EP1764173A2 (fr) Dispositif pour mouler de la poudre par pression
DE3923760C2 (de) Verdichtervorrichtung für eine Druckgießmaschine
DE2430656C2 (de) Preßstempel zum Herstellen eines Külbels
EP0670207B1 (fr) Dispositif pour la fabrication d'éléments cylindriques tubulaires
DE3004024C2 (de) Werkzeug zum Herstellen eines Gelenkkörpers
DE2906858C2 (de) Formvorrichtung zur Erzeugung von Formteilen aus Glas, Keramik, Kunststoff u.dgl.
EP0255719B1 (fr) Dispositif et procédé pour fabriquer des pièces moulées creuses de forme conique ou cylindrique, en particulier tasses avec une anse
EP0427083B1 (fr) Presse d'extrusion de métaux horizontale
EP1602473B1 (fr) Installation pour la préparation d'une pièce compactée à partir de poudre
EP3917698B1 (fr) Corps de masselotte en une pièce a utiliser lors du coulage de métaux
DE3523164C1 (de) Hydraulische Presse, insbes. für die Herstellung von Preßteilen aus faserverstärktem Kunststoff
DE102017130680B4 (de) Matrize für eine Presse sowie Verfahren zur Herstellung mindestens eines Grünlings mit einer solchen Presse
EP1731246A1 (fr) Appareil pour la fabrication d'une diversité des objets moulés de poudre.
DE3444322C2 (fr)
DE2315861A1 (de) Vorrichtung zur herstellung von formpresslingen
DE466984C (de) Vorrichtung zur Herstellung von hinterschnittenen Ausnehmungen in Formbloecken aus plastischer Masse
DE10154447B4 (de) Kunststoffspritzverfahren zum Spritzen von einseitig offenen Hohlkörpern als Formteile
DE2644680C3 (de) Einrichtung an einer Presse für die Verformung zylindrischer Rohlinge
DE2357309B2 (de) Preßform zur pulvermetallurgischen Herstellung von Kontaktdüsen für Schweißmaschinen
EP0780204B1 (fr) Procédé et dispositif pour la fabrication de tuyaux à emboítement moulés
DE2927340C2 (de) Vorrichtung zum Nachformpressen von Kanalendsteinen
DE1238829B (de) Vorrichtung zum Pressen von Hohlbausteinen in einer Form mittels im Querschnitt dehnbarer Kerne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE ES FR GB IT LI

17P Request for examination filed

Effective date: 19960228

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19980129

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IT LI

REF Corresponds to:

Ref document number: 170794

Country of ref document: AT

Date of ref document: 19980915

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: A. BRAUN, BRAUN, HERITIER, ESCHMANN AG PATENTANWAE

REF Corresponds to:

Ref document number: 59503475

Country of ref document: DE

Date of ref document: 19981015

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2123169

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990302

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: ERLUS BAUSTOFFWERKE AG

Free format text: STROBEL, KLAUS, DIPL.-ING.#PFAFFENLEITHE 17#D-95100 SELB (DE) -TRANSFER TO- ERLUS BAUSTOFFWERKE AG#HAUPTSTRASSE 106#84088 NEUFAHRN (DE)

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20080221

Year of fee payment: 14

Ref country code: CH

Payment date: 20080225

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080227

Year of fee payment: 14

Ref country code: GB

Payment date: 20080222

Year of fee payment: 14

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: ERLUS BAUSTOFFWERKE AG

Free format text: ERLUS BAUSTOFFWERKE AG#HAUPTSTRASSE 106#84088 NEUFAHRN (DE) -TRANSFER TO- ERLUS BAUSTOFFWERKE AG#HAUPTSTRASSE 106#84088 NEUFAHRN (DE)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20080222

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080219

Year of fee payment: 14

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090227

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090228

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090227

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20091030

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20090228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090227

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090302

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090227

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20131212

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59503475

Country of ref document: DE