EP0320681B1 - Tête de mannequin pour une installation de coulée de bandes d'acier - Google Patents

Tête de mannequin pour une installation de coulée de bandes d'acier Download PDF

Info

Publication number
EP0320681B1
EP0320681B1 EP88119732A EP88119732A EP0320681B1 EP 0320681 B1 EP0320681 B1 EP 0320681B1 EP 88119732 A EP88119732 A EP 88119732A EP 88119732 A EP88119732 A EP 88119732A EP 0320681 B1 EP0320681 B1 EP 0320681B1
Authority
EP
European Patent Office
Prior art keywords
cooling
connecting element
drive head
shrinkage
projections
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
EP88119732A
Other languages
German (de)
English (en)
Other versions
EP0320681A3 (en
EP0320681A2 (fr
Inventor
Manfred Kolakowski
Rainer Golla
Egon Foermer
Rolf Padberg
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
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 SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT88119732T priority Critical patent/ATE62617T1/de
Publication of EP0320681A2 publication Critical patent/EP0320681A2/fr
Publication of EP0320681A3 publication Critical patent/EP0320681A3/de
Application granted granted Critical
Publication of EP0320681B1 publication Critical patent/EP0320681B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/08—Accessories for starting the casting procedure
    • B22D11/081—Starter bars
    • B22D11/083—Starter bar head; Means for connecting or detaching starter bars and ingots

Definitions

  • the invention relates to a start-up head for a steel strip caster for introduction into the mold, on which an upper cooling and connecting element is arranged, which is provided with spaced-apart projections which form a positive connection with the solidifying metal melt.
  • a start-up head of the aforementioned type is known, a cooling and connecting element being fastened by screws to a start-up head which is connected to a start-up line. Mushroom-like projections are molded onto the top of the cooling and connecting element and are cast around them by the inflowing steel melt. Due to strong cooling, the melt solidifies in the area of the cooling and connecting element immediately to form a compact, form-fitting connecting unit.
  • the object of the invention is to provide a start-up head for a steel strip casting installation, shrinkage cracks at the beginning of the casting strip being avoided.
  • the beginning of the cast strip and the cooling and connecting element are subject to opposite temperature profiles.
  • the cooling and connecting element that is coldly introduced into the mold is continuously heated by the molten steel and the freezing of the strip and consequently expands.
  • the beginning of the strip is further cooled by the application of cooling water and attempts to shrink. Since the shrinkage is blocked by the compact connection to the expanding cooling and connecting element, harmful shrinkage cracks occur in the longitudinal direction of the beginning of the strip.
  • the object of the invention is achieved in the generic start-up line in that the cooling and connecting element is divided between at least two projections by shrinking joints which are sealed against the melt.
  • the cooling and connecting element and the start-up head are displaceably connected in the longitudinal direction of their contact surfaces in order to reduce the size of the shrink joints.
  • the width of the shrink joints is advantageously determined and filled by a fireproof fleece.
  • the width of the shrink joints can advantageously be about 20 mm.
  • a U-shaped cover profile can be pushed onto the cooling and connecting element.
  • two opposite broad side walls 1, 2 and two narrow side walls 3, 4 arranged between parallel side regions of the wide side walls 1, 2 form the molding space.
  • the broad side walls 1, 2 and the narrow side walls 3, 4 are provided with channels 5.
  • the broad side walls 1, 2 form an enlarged pouring area 6 into their center into which a pouring tube 7 projects.
  • a start-up head consisting of a lower part 8 and a multi-part cooling and connecting element 9a, 9b, 9c in the lower part of the mold.
  • the lower part 8 of the start-up head connected to a pull-out element 10 fills the mold with little play.
  • the flat gasket 11, which is formed of a matt mat, has a slight projection relative to the mold opening, so that an all-round sealing system is ensured within the mold.
  • the three-part cooling and connecting element 9a, 9b, 9c is placed, which has an all-round distance to the mold walls 1, 2, 3, 4 and is provided with mushroom-like projections 13 on its top. Screws 15 are held with their heads in transverse grooves 14 of the lower part 8, by means of which nuts 16 hold the flat gasket 11, steel plate 12 and the cooling and connecting element 9a, 9b, 9c provided with corresponding bores.
  • shrink joints 18 which are filled with refractory ceramic fleece 19.
  • the shrink joints 18 have a width of 20 mm.
  • the screw passage openings are designed as elongated holes 17, so that its parts 9a, 9b, 9c follow the shrinkage of the beginning of the cast strip in the sense of a reduction in the shrinkage joints 18 and a relative movement with respect to the lower part 8 of the starting head is possible.
  • U-shaped covers 20 are pushed over the cooling and connecting element 9a, 9b, 9c in the area of the shrink joints.
  • the profile wall of the covers 20 is 3-5 mm, with a small gap to the mold wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Coating With Molten Metal (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Braking Arrangements (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (5)

1. Tête de fausse barre pour installation de coulée continue de bandes d'acier qui s'engage dans la lingotière et s'associe, à sa partie supérieure, à un élément de refroidissement et de liaison (9a, 9b, 9c) qui comporte des parties saillantes (13) situées à une certaine distance les unes des autres et reliées avec adaptation des formes à la partie du bain qui se solidifie, caractérisée en ce que l'élément de refroidissement et de liaison (9a, 9b, 9c) est subdivisé, entre au moins deux parties saillantes (11), par des joints de retrait (18) hermétiquement isolés du bain.
2. Tête de fausse barre selon la revendication 1, caractérisée en ce que l'élément de refroidissement et de liaison (9a, 9b, 9c) et une partie inférieure (8) sont reliés de manière à pouvoir se déplacer dans le sens de la longueur de leurs surfaces de contact pour réduire les joints de retrait (18).
3. Tête de fausse barre selon la revendication 1, caractérisée en ce que les joints de retrait (18) sont délimités et remplis sur toute leur largeur par une bourre réfractaire (19).
4. Tête de fausse barre selon la revendication 3, caractérisée en ce que la largeur des joint de retrait (18) est de 20 mm environ.
5. Tête de fausse barre selon une des revendications 1 à 3, caractérisée en ce que les joints de retrait (18) sont hermétiquement isolés du bain par un profil couvrant (20) en forme d'U.
EP88119732A 1987-12-12 1988-11-26 Tête de mannequin pour une installation de coulée de bandes d'acier Expired - Lifetime EP0320681B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88119732T ATE62617T1 (de) 1987-12-12 1988-11-26 Anfahrkopf fuer eine stahlbandgiessanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3742190 1987-12-12
DE19873742190 DE3742190A1 (de) 1987-12-12 1987-12-12 Anfahrkopf fuer eine stahlbandgiessanlage

Publications (3)

Publication Number Publication Date
EP0320681A2 EP0320681A2 (fr) 1989-06-21
EP0320681A3 EP0320681A3 (en) 1989-08-30
EP0320681B1 true EP0320681B1 (fr) 1991-04-17

Family

ID=6342472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119732A Expired - Lifetime EP0320681B1 (fr) 1987-12-12 1988-11-26 Tête de mannequin pour une installation de coulée de bandes d'acier

Country Status (4)

Country Link
EP (1) EP0320681B1 (fr)
AT (1) ATE62617T1 (fr)
DE (2) DE3742190A1 (fr)
ES (1) ES2021816B3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399834B (de) * 1993-02-12 1995-07-25 Voest Alpine Ind Anlagen Anfahrkopf für eine stranggiessanlage
ES2400704T3 (es) * 2008-05-23 2013-04-11 Concast Ag Sistema de obturación de cabeza de barra fría en una coquilla de una instalación de colada continua para colar perfiles preliminares de gran formato

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE704512C (de) * 1938-09-20 1941-04-01 Siegfried Junghans Abschluss- und Ausziehvorrichtung beim Giessen von Straengen, insbesondere aus Metal
BE649902A (fr) * 1963-06-27
DE1458078A1 (de) * 1963-09-02 1970-01-08 Kocks Dr Ing Friedrich Einrichtung zum Herstellen langer Bloecke,insbesondere Stahlbloecke
US3653427A (en) * 1969-08-12 1972-04-04 Mitsubishi Heavy Ind Ltd Dummy bar mechanism
DE3603190A1 (de) * 1986-02-03 1987-08-06 Schloemann Siemag Ag Anfahrkopf fuer eine stahlbandgiessanlage

Also Published As

Publication number Publication date
DE3862461D1 (de) 1991-05-23
ATE62617T1 (de) 1991-05-15
EP0320681A3 (en) 1989-08-30
EP0320681A2 (fr) 1989-06-21
ES2021816B3 (es) 1991-11-16
DE3742190A1 (de) 1989-06-22

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