EP1194254B1 - Verfahren zum abdichten der kokillen/anfahrstrang-anordnung einer stranggiessanlage und entsprechendes dichtungselement - Google Patents

Verfahren zum abdichten der kokillen/anfahrstrang-anordnung einer stranggiessanlage und entsprechendes dichtungselement Download PDF

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Publication number
EP1194254B1
EP1194254B1 EP00935181A EP00935181A EP1194254B1 EP 1194254 B1 EP1194254 B1 EP 1194254B1 EP 00935181 A EP00935181 A EP 00935181A EP 00935181 A EP00935181 A EP 00935181A EP 1194254 B1 EP1194254 B1 EP 1194254B1
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EP
European Patent Office
Prior art keywords
seal element
ingot mould
dummy bar
seal
ingot
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
EP00935181A
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English (en)
French (fr)
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EP1194254A1 (de
Inventor
Alfredo Poloni
Massimo Maurizio
Michele Meret
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.)
Danieli and C Officine Meccaniche SpA
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Danieli and C Officine Meccaniche SpA
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Publication of EP1194254A1 publication Critical patent/EP1194254A1/de
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    • 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
    • B22D11/088—Means for sealing the starter bar head in the moulds

Definitions

  • the present invention refers to a method for sealing the ingot-mould/dummy-bar assembly in a continuous-casting plant, to the sealing gasket for implementing the method, and to the use of the said gasket in continuous casting. More in particular, the invention refers to a method in which the shaped gasket is set in the crystallizer off line, in conditions of total safety.
  • the liquid metal is poured into an open-bottomed cooled crystallizer, or ingot mould, located above a line for extraction and further cooling.
  • the poured metal solidifies to form a shell, generally still containing liquid metal, which is extracted in a continuous way from the bottom of the ingot mould.
  • the liquid metal contained in the shell solidifies completely along the casting line, after which the body thus produced is generally straightened and then cut into parts of a pre-set length.
  • a body is used, referred to as dummy bar, having a cross section slightly smaller than that of the ingot mould, so as to act as a provisional closure for the latter.
  • the dummy bar is on the one side in contact with an underlying extraction assembly and, on the other, is equipped with means of hooking onto the body being formed by solidification of the liquid metal in the ingot mould.
  • gaskets are used to be set directly on the head of the dummy bar, such as, for example, in the published Japanese patent application JP 8174160, or interposed plates, as in the European patent application No. 231 520, it is necessary to prevent the gasket from getting damaged by impact or tearing when the dummy bar is coming up to the ingot mould. Consequently, it is necessary to mount the gasket immediately before the ingot mould, and, to do this, the staff is obliged to work in the cooling chamber underneath the ingot mould to fix the gasket by hand on the head of the dummy bar, i.e., in working conditions that are even more uncomfortable and dangerous than those at the mouth of the ingot mould.
  • JP-A-5285610 discloses a seal which is mounted on the dummy bar head.
  • the present invention has the purpose of overcoming these drawbacks by providing, according to a first aspect of the invention, a simple and safe method having the features of claim 1, for ensuring sealing of the ingot-mould/dummy-bar assembly.
  • the method according to the present invention is essentially based on the fact that a pre-formed seal element is used which is mounted inside the ingot mould, before insertion of the dummy bar in the latter, off the casting line used, preferably outside the casting plant.
  • This latter solution is to be preferred on account of the major advantages that it offers, both in terms of execution times and on account of the conditions of absolute safety in which it is carried out.
  • there may exist situations for example in plants with an ingot mould mounted in stand-by alongside the casting line used, in which it may prove necessary to install the gasket within the casting plant, albeit outside the casting line being used.
  • the aforesaid seal element is preferably equipped, along its entire edge, with a peripheral projecting raised part, roughly at right angles to the plane of the element and having a roughly wedge-shaped cross section tapered towards the free end, to be easily adapted to the head of the dummy bar when the latter is set inside the ingot mould, and to be gradually pressed between the dummy bar and the ingot mould in order to guarantee a perfect seal.
  • the seal element may consist of a single sheet-like body made of plastic material, or of a plurality of parts consolidated by an associated rigid plate, for example made of metal.
  • the seal element which is provided with a central through hole, may be equipped also with a plurality of cuts that start from the central hole, to facilitate passage of the element of consolidation with the cast body.
  • seal elements In practice, a plurality of types of seal elements is prepared, one for each cross section of ingot mould.
  • the appropriate seal element is chosen and, before insertion of the dummy bar, the element is installed inside the ingot mould, where it remains blocked, since, as has been mentioned previously, it has a cross section of slightly larger dimensions than the internal dimensions of the ingot mould.
  • the ingot mould provided with gasket can then be transported in due time to the continuous-casting machine and fixed on the latter.
  • the dummy bar provided with the elements for hooking to the cast body, is made to go up towards the ingot mould and is pushed inside the latter.
  • the engagement between the dummy bar, the internal walls of the ingot mould and the seal element favours the squeezing of the peripheral edge of the seal element against the ingot mould, in particular if the seal element is provided with a raised part projecting at right angles, thus affording a perfect seal.
  • the elements for consolidation of the dummy bar with the cast body may be of any suitable type, for example of the so-called starting hook, or starting cage, or spiral type, may be integral with the dummy bar, or removable from the latter, or may be integral with the rigid plate, which in turn may be connected, in a removable way, with the dummy bar.
  • the said consolidation elements or the said plate may be connected to the dummy bar by means of fast-clamping and fast-release elements, for example expansion rings, spring-action hooks, and the like.
  • Figure 1 a schematic plan view is shown of a seal element 1, provided with a projecting raised part 2 on its edge (shown hatched), with a central hole 3 and with cuts 4.
  • the head of the dummy bar 7 is introduced into the ingot mould 5, as shown in Figure 3, thus squeezing the edge 2 of the seal element 1 between the dummy bar and the internal walls of the ingot mould.
  • the consolidation element 6 has forced the cuts 4 of Figure 1 to open so as to be able to pass through the hole 3, project within the ingot mould, and here subsequently hook up to the metal that will be cast into the ingot mould.
  • the seal element 1 is advantageously made of semi-rigid and deformable material, such as plastics, thermoplastic resins and other materials having similar characteristics of strength and ductility.
  • the seal element 1 can, in this latter case, also be reinforced by a stiffening plate 12, if necessary to achieve a better hold inside the ingot mould.
  • the seal body 1 may have the shape of a plane sheet in a relatively rigid deformable material, preferably provided, on its edges, with a continuous raised part 2 having a roughly wedge-shaped section, projecting roughly at right angles from the plane of the said sheet.
  • a rigid plate 8 for example made of metal, having, in plan view, a shape similar to the internal cross section of the ingot mould, but of smaller dimensions, this plate being equipped with means 6 for consolidation with the cast body and means (not shown) of hooking to the dummy bar.
  • peripheral seal elements 10 which are made of plastic material and which form a continuous projecting part which protrudes beyond the edges of the rigid plate itself, so that the plate-plus-seal-elements ensemble assumes dimensions slightly larger than the internal dimensions of the ingot mould, in a way similar to what has been said regarding the seal element 1 in the form of a sheet, as described above.
  • This ensemble is mounted, before insertion of the dummy bar, within the ingot mould, as has already been described for the element 1.
  • Figure 5 shows a possible cross sections of the said seal element 10, which is roughly U-shaped, and provided with a continuous raised part 2 having a roughly wedge-shaped cross section.
  • Figure 9 shows another variant of the cross section of the seal element, which in this case has the shape of a frame fitting only around the peripheral edge of the dummy bar head and leaving open the central part, to provide space for a hook 13 to couple with a correspondent hook 11 solidarily fixed to the rigid plate 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Sealing Material Composition (AREA)
  • Gasket Seals (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (15)

  1. Verfahren zum Abdichten der Kokillen/Anfahrstrang-Anordnung einer Stranggießanlage, das in den folgenden Schritten erfolgt:
    a) Bereitstellung eines vorgeformten Dichtungselements,
    b) Montage des genannten Dichtungselements in der Kokille, während diese sich außerhalb der betriebenen Gießstraße befindet,
    c) Einsetzen des Anfahrstrangs in dem genannten Dichtungselement,
    d) Verankerung des genannten Anfahrstrangs an dem genannten Dichtungselement mittels einer Spannvorrichtung.
  2. Verfahren entsprechend Anspruch 1, wobei der Schritt, in dem das Dichtungselement in der Kokille montiert wird, erfolgt, während die letztere sich außerhalb der Gießanlage befindet.
  3. Verfahren entsprechend Anspruch 1, wobei das genannte Dichtungselement im Grundriss eine ähnliche Gestalt wie der innere Horizontalschnitt der Kokille aufweist, mit der es verwendet wird, und wobei weiter die linearen Abmessungen der Seiten etwas größer sind als die entsprechenden Seiten der Kokille.
  4. Verfahren entsprechend Anspruch 3, wobei die linearen Abmessungen der Seiten des Dichtungselements um einen Betrag zwischen 0,1 und 4 % größer sind als die Abmessungen der entsprechenden Seiten der Kokille.
  5. Verfahren entsprechend Anspruch 1, wobei eine Abdichtung zwischen dem Anfahrstrang und der Kokille dadurch zustande kommt, dass der Rand des genannten Dichtungselements verformt wird, wenn er zwischen die Innenwände der Kokille (5) und den Anfahrstrang (7) gedrückt wird.
  6. Verfahren entsprechend Anspruch 5, wobei das Dichtungselement (1) einen hochgezogenen Rand (2) besitzt, der ungefähr im rechten Winkel zur Ebene des Dichtungselements heraussteht und in einem Stück mit ihm ist, und wobei weiter der herausstehende hochgezogene Rand einen ungefähr dreieckigen Querschnitt besitzt und beim Einsatz zwischen den Anfahrstrang und die Innenwände der Kokille eingeklemmt ist.
  7. Dichtungselement (1) zur Sicherstellung der Abdichtung zwischen einem Anfahrstrang (7) und einer Kokille (5) in einer Stranggießanlage, dessen ebener Grundriss der Form der Kokille (5), in die es eingesetzt wird, entspricht, versehen mit einem Teil (2), mit dem es in einem Stück ist und der entlang seines äußeren Rands verläuft und praktisch im rechten Winkel zu dem genannten ebenen Grundriss heraussteht, wobei der herausstehende Teil (2) einen praktisch dreieckigen Querschnitt hat, der sich in Richtung des Anfahrstrangs (7) verjüngt, und wobei weiter der zentrale Teil des Dichtungselements (1) aus einem relativ dünnen ebenen Körper besteht, der in der Mitte mit einem relativ kleinen Loch (3) versehen ist, das dafür vorgesehen ist, dass eine aus dem Anfahrstrang (7) herausragende Hakvorrichtung (6) hindurchgeführt wird, mittels derer der Anfahrstrang am Gussstrang verankert werden kann, und wobei weiter die linearen Abmessungen des Dichtungselements (1) etwas größer sind als diejenigen der entsprechenden Innenwände der Kokille, so dass das Dichtungselement (1) in der Kokille (5) montiert werden kann, während der Anfahrstrang sich außerhalb der Gießanlage befindet, und durch Reibung mit den Innenwänden der Kokille in seine Lage gehalten wird.
  8. Dichtungselement entsprechend Anspruch 7 mit einer starren Platte (1), die mit einer Vorrichtung (11) zur festen Verbindung mit dem Vorfahrstrang (7) versehen ist.
  9. Dichtungselement entsprechend Anspruch 7 mit einer flexiblen Platte (1, 14), die mit einer Vorrichtung (11) zu festen Verbindung mit dem Vorfahrstrang (7) versehen ist.
  10. Dichtungselement entsprechend Anspruch 8 oder 9, bestehend aus mehreren getrennten Segmenten, die entlang des Rands der genannten Platte montiert sind.
  11. Dichtungselement entsprechend Anspruch 8 oder 9, wobei die Vorrichtung (11) zur festen Verbindung mit dem Vorfahrstrang auf lösbare Weise an dem Vorfahrstrang (7) verankert ist.
  12. Dichtungselement entsprechend Anspruch 9, wobei die flexible Platte (14) mit einer starren Platte (12) verstärkt ist.
  13. Dichtungselement (1) zur Sicherstellung der Abdichtung zwischen einem Anfahrstrang (7) und einer Kokille (5) in einer Stranggießanlage, dessen ebener Grundriss der Form der Kokille (5), in die es eingesetzt wird, entspricht, versehen mit einem am Rand umlaufenden Dichtungsteil (2), der praktisch im rechten Winkel zu dem genannten ebenen Grundriss heraussteht, wobei der am Rand umlaufende Dichtungsteil (2) einen praktisch dreieckigen Querschnitt hat, der sich in Richtung des Anfahrstrangs (7) verjüngt, und wobei weiter der zentrale Teil des Dichtungselements
    (1) aus einem relativ dünnen ebenen Körper besteht, der mit einem relativ kleinen Loch
    (3) versehen ist, das dafür vorgesehen ist, dass eine aus dem Anfahrstrang (7) herausragende Hakvorrichtung (6) hindurchgeführt wird, mittels derer der Anfahrstrang am Gussstrang verankert werden kann, und wobei weiter der genannte am Rand umlaufende Teil entlang der Kante des genannten ebenen Körpers montiert ist und die linearen Abmessungen seiner Seiten etwas größer sind als diejenigen der entsprechenden Innenwände der Kokille, so dass das Dichtungselement (1) in der Kokille (5) montiert werden kann, während der Anfahrstrang sich außerhalb der Gießanlage befindet, und durch Reibung mit den Innenwänden der Kokille in seine Lage gehalten wird.
  14. Dichtungselement entsprechend Anspruch 13, wobei der am Rand umlaufende Dichtungsteil (2) aus mehreren getrennten Segmenten hergestellt ist.
  15. Verwendung eines Dichtungselements (1) entsprechend einem der Ansprüche 7 bis 14 in einem Stranggießprozess, wobei das Dichtungselement (1) in der Kokille (5) montiert wird, bevor der Anfahrstrang (7) darin eingesetzt wird.
EP00935181A 1999-06-10 2000-06-07 Verfahren zum abdichten der kokillen/anfahrstrang-anordnung einer stranggiessanlage und entsprechendes dichtungselement Expired - Lifetime EP1194254B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT1999MI001295A ITMI991295A1 (it) 1999-06-10 1999-06-10 Metodo per la sigillatura dell'insieme lingotteria - falsa barra in un impianto di colata continua e relativo elemento sigillante
ITMI991295 1999-06-10
PCT/EP2000/005221 WO2000076693A1 (en) 1999-06-10 2000-06-07 Method for sealing the ingot-mould/dummy-bar assembly in a continuous-casting plant, and corresponding seal element

Publications (2)

Publication Number Publication Date
EP1194254A1 EP1194254A1 (de) 2002-04-10
EP1194254B1 true EP1194254B1 (de) 2003-08-27

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Application Number Title Priority Date Filing Date
EP00935181A Expired - Lifetime EP1194254B1 (de) 1999-06-10 2000-06-07 Verfahren zum abdichten der kokillen/anfahrstrang-anordnung einer stranggiessanlage und entsprechendes dichtungselement

Country Status (8)

Country Link
EP (1) EP1194254B1 (de)
CN (1) CN1221346C (de)
AT (1) ATE248039T1 (de)
AU (1) AU765130B2 (de)
DE (1) DE60004848T2 (de)
ES (1) ES2204609T3 (de)
IT (1) ITMI991295A1 (de)
WO (1) WO2000076693A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009073005A1 (en) * 2007-12-04 2009-06-11 Loma Machine, A Division Of Magnum Integrated Technologies Inc. Waterbox for use with a continuous casting assembly for vertically casting metal slabs

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2127780B1 (de) * 2008-05-23 2012-12-05 Concast Ag Kaltstrangkopf-Abdichtsystem in einer Kokille einer Stranggiessanlage zum Giessen grossformatiger Vorprofile
KR20130088841A (ko) * 2010-06-30 2013-08-08 지멘스 브이에이아이 메탈스 테크놀로지스 게엠베하 예비 프로파일을 주조하기 위한 연속 주조기용 초기 주조품, 더미 바 헤드 및 더미 바
CN102847895B (zh) * 2012-09-17 2015-06-17 中天钢铁集团有限公司 炼钢连铸工艺用引锭装置及其引锭方法
CN106925734B (zh) * 2015-12-31 2019-12-20 宁波创润新材料有限公司 引锭头的制造方法
US10875087B1 (en) * 2020-02-20 2020-12-29 Wagstaff, Inc. System, apparatus, and method for mold starter block alignment
CN113145812B (zh) * 2021-04-01 2022-10-25 东北大学 一种优化连铸开浇瞬态钢液流动的方法
DE102021213770A1 (de) 2021-12-03 2023-06-07 Sms Group Gmbh Abdichtsystem für eine Stranggießanlage
WO2024094846A1 (de) 2022-11-04 2024-05-10 Sms Group Gmbh ABDICHTSYSTEM ZUR VERWENDUNG MIT EINEM KALTSTRANGKOPF EINER STRANGGIEßANLAGE UND VERFAHREN ZUM HERSTELLEN EINES METALLISCHEN PRODUKTS MITTELS STRANGGIEßEN UNTER VERWENDUNG DES ABDICHTSYSTEMS
DE102023210885A1 (de) 2022-11-04 2024-05-08 Sms Group Gmbh Abdichtsystem zur Verwendung mit einem Kaltstrangkopf einer Stranggießanlage und Verfahren zum Herstellen eines metallischen Produkts mittels Stranggießen unter Verwendung des Abdichtsystems

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
CH659016A5 (de) * 1982-12-20 1986-12-31 Concast Service Union Ag Verfahren und einrichtung zum abdichten eines anfahrkopfes in einer stranggiesskokille.
JPH05285610A (ja) * 1992-04-14 1993-11-02 Nippon Steel Corp 連続鋳造スタート用のモールドシール装置及びその使用方法
JPH06106307A (ja) * 1992-09-29 1994-04-19 Sumitomo Heavy Ind Ltd 連続鋳造におけるダミーバーヘッドのシール方法
AT401148B (de) * 1993-03-30 1996-06-25 Voest Alpine Ind Anlagen Dichtung für einen anfahrkopf zur verwendung in einer stranggiessanlage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009073005A1 (en) * 2007-12-04 2009-06-11 Loma Machine, A Division Of Magnum Integrated Technologies Inc. Waterbox for use with a continuous casting assembly for vertically casting metal slabs

Also Published As

Publication number Publication date
AU765130B2 (en) 2003-09-11
ITMI991295A1 (it) 2000-12-10
DE60004848D1 (de) 2003-10-02
ES2204609T3 (es) 2004-05-01
WO2000076693A1 (en) 2000-12-21
ATE248039T1 (de) 2003-09-15
EP1194254A1 (de) 2002-04-10
ITMI991295A0 (it) 1999-06-10
CN1354702A (zh) 2002-06-19
CN1221346C (zh) 2005-10-05
DE60004848T2 (de) 2004-07-08
AU5076200A (en) 2001-01-02

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