ATE264736T1 - COLLAPSIBLE CORE - Google Patents

COLLAPSIBLE CORE

Info

Publication number
ATE264736T1
ATE264736T1 AT96934445T AT96934445T ATE264736T1 AT E264736 T1 ATE264736 T1 AT E264736T1 AT 96934445 T AT96934445 T AT 96934445T AT 96934445 T AT96934445 T AT 96934445T AT E264736 T1 ATE264736 T1 AT E264736T1
Authority
AT
Austria
Prior art keywords
pipe
longitudinal axis
collapsible core
shell
areas
Prior art date
Application number
AT96934445T
Other languages
German (de)
Inventor
Johannes Hvidegaard
Original Assignee
Pedershaab As
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 Pedershaab As filed Critical Pedershaab As
Application granted granted Critical
Publication of ATE264736T1 publication Critical patent/ATE264736T1/en

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
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/86—Cores
    • B28B21/88—Cores adjustable, collapsible or expansible

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Materials For Medical Uses (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Dental Preparations (AREA)

Abstract

A collapsible core for casting e.g. tubular well articles, comprising an annular shell (1) which substantially forms a pipe having a longitudinal axis extending between the ends of the pipe, said shell (1) being flexurally flexible about the longitudinal axis of the pipe. According to the invention, the shell (1) has at least two first areas separated by at least one second area (A), said areas extending between the ends of the pipe, said second area (A) having a flexural flexibility about the longitudinal axis of the pipe which is smaller than the corresponding flexural flexibility in the two first areas. This ensures that the collapsible core has a relatively high degree of collapse, while having an extremely stable shape.
AT96934445T 1995-10-16 1996-10-15 COLLAPSIBLE CORE ATE264736T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK199501165A DK173581B1 (en) 1995-10-16 1995-10-16 The shrink core
PCT/DK1996/000441 WO1997014544A1 (en) 1995-10-16 1996-10-15 A collapsible core

Publications (1)

Publication Number Publication Date
ATE264736T1 true ATE264736T1 (en) 2004-05-15

Family

ID=8101728

Family Applications (1)

Application Number Title Priority Date Filing Date
AT96934445T ATE264736T1 (en) 1995-10-16 1996-10-15 COLLAPSIBLE CORE

Country Status (6)

Country Link
EP (1) EP0855951B1 (en)
AT (1) ATE264736T1 (en)
AU (1) AU7279596A (en)
DE (1) DE69632260T2 (en)
DK (1) DK173581B1 (en)
WO (1) WO1997014544A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005032781A1 (en) * 2003-10-07 2005-04-14 Vertech Hume Pty Ltd Vertical moulding of long concrete articles
DE102012220814A1 (en) 2012-11-14 2014-05-15 Johann Schlüsselbauer Shrinking core for mold during production of hollow bodies of concrete, has core casing whose opposite longitudinal edge portions is connected with partially elastomeric connecting web in spread position at shear-resistant manner

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE212494C (en) *
US1101204A (en) * 1913-01-30 1914-06-23 C F Massey Company Collapsible core for concrete pipes.
US1540185A (en) * 1924-07-21 1925-06-02 Claude G Richards Mold
US3570802A (en) * 1968-10-10 1971-03-16 Hydro Conduit Corp Concrete-molding apparatus having an inner mold member with variable dimension periphery

Also Published As

Publication number Publication date
AU7279596A (en) 1997-05-07
DE69632260D1 (en) 2004-05-27
EP0855951A1 (en) 1998-08-05
WO1997014544A1 (en) 1997-04-24
DE69632260T2 (en) 2005-06-23
EP0855951B1 (en) 2004-04-21
DK116595A (en) 1997-04-17
DK173581B1 (en) 2001-03-26

Similar Documents

Publication Publication Date Title
DK1027552T3 (en) Variable stiffness pods
FR2676379B1 (en) APPARATUS FOR SHAPING A TUBE END.
FR2687753B1 (en) BELLOWS, PARTICULARLY FOR HOMOCINETIC JOINTS.
FR2687007B1 (en) IMAGE INTENSIFIER TUBE, IN PARTICULAR OF THE NEARLY FOCUSING TYPE.
ATE264736T1 (en) COLLAPSIBLE CORE
BR9907887A (en) Conduit element
EP0902253A3 (en) Vibrating gyroscope
FR2695386B1 (en) Process for the separation of hydrogen fluoride from its mixtures with 1,1,1-trifluoro-2-chloroethane.
NO891806L (en) COMPARABLE ROCKING.
FR2706078B1 (en) Electron beam tube.
ITRM950180V0 (en) SET-UP FOR THE PERFORMANCE OF THE "WORMHOLE ACTION MATCH" GAME.
FR2673128B1 (en) PROCESS FOR THE MANUFACTURE, BY FORMING, OF AN EXTERNAL PART OF AN ARTICULATED JOINT.
FR2698094B1 (en) Purification of 1,1-dichloro-1-fluoroethane.
FR2708086B1 (en) Sectorized tubular structure working on implosion.
ES2015519A4 (en) BELLOWS FLEXIBLE TUBE FORMING CHUCK.
ITBO940189A0 (en) MACHINE FOR BELL FORMING THE ENDS OF THERMALLY PLASTICISED TUBES.
FI923750A (en) GJUTAVPUTSNINGAMASKIN SAMT -FOERFARANDE
FR2711648B1 (en) Process for the purification of 1,1,1,2-tetrafluoroethane.
FI934848A0 (en) A method and a mold for making an extension, such as a sleeve in a tube and a plastic tube
DE69825039D1 (en) Sheathed drain pipe
EP1174372A3 (en) Connection element for two components, one of which is tubular
IT241046Y1 (en) ECCENTRIC SILENCED FOR HYDRAULIC SYSTEMS
AU5806594A (en) Casting tube
DE69601410D1 (en) Expanded lining
EP1157641A3 (en) Backrest

Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification

Ref document number: 0855951

Country of ref document: EP

EEIH Change in the person of patent owner
REN Ceased due to non-payment of the annual fee