EP1194254B1 - Procede pour etancheifier l'ensemble lingotiere/fausse barre d'une installation de coulee en continu, et element d'etancheification correspondant - Google Patents

Procede pour etancheifier l'ensemble lingotiere/fausse barre d'une installation de coulee en continu, et element d'etancheification correspondant 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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German (de)
English (en)
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EP1194254A1 (fr
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
Original Assignee
Danieli and C Officine Meccaniche SpA
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Application filed by Danieli and C Officine Meccaniche SpA filed Critical Danieli and C Officine Meccaniche SpA
Publication of EP1194254A1 publication Critical patent/EP1194254A1/fr
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Publication of EP1194254B1 publication Critical patent/EP1194254B1/fr
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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
    • B22D11/088—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)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (15)

  1. Méthode de fermeture hermétique d'un assemblage moule à lingots/barre factice dans une installation de moulage en continu comprenant les phases suivantes :
    a) fourniture d'un élément de fermeture hermétique préformé,
    b) montage dudit élément de fermeture hermétique à l'intérieur du moule à lingots quand celui-ci se trouve à l'extérieur de la ligne de moulage utilisée,
    c) introduction de la barre factice dans ledit élément de fermeture hermétique,
    d) fixation de ladite barre factice sur ledit élément de fermeture hermétique au moyen de dispositifs de serrage.
  2. Méthode selon la revendication 1, comprenant la phase de montage dudit élément de fermeture hermétique dans ledit moule à lingots quand ce dernier se trouve à l'extérieur de l'installation de moulage.
  3. Méthode selon la revendication 1, caractérisée en ce qu'elle prévoit ledit élément de fermeture hermétique, dans une perspective de plan, avec une forme similaire à la section horizontale interne du moule à lingots avec lequel il sera utilisé, et les dimensions linéaires des côtés légèrement plus larges que les dimensions des côtés correspondants du moule à lingots.
  4. Méthode selon la revendication 3, caractérisée en ce qu'elle prévoit les dimensions linéaires des côtés dudit élément de fermeture hermétique plus larges que les dimensions des côtés correspondants du moule à lingots dans une fourchette de variation pouvant aller de 0,1 à 4 %.
  5. Méthode selon la revendication 1, caractérisée en ce qu'elle prévoit une fermeture hermétique entre la barre factice et le moule à lingots au moyen d'une déformation du côté dudit élément de fermeture hermétique forcé entre les parois internes du moule à lingots (5) et la barre factice (7).
  6. Méthode selon la revendication 5, caractérisée en ce que ledit élément de fermeture hermétique (1) est pourvu d'un côté ayant une partie relevée (2) s'étendant grossièrement à angles droits vers le plan de l'élément de fermeture hermétique et s'intégrant à celui-ci, ladite partie relevée qui se projette ayant une section transversale grossièrement triangulaire et étant forcée, pendant l'utilisation, entre la barre factice et les parois internes du moule à lingots.
  7. Elément de fermeture hermétique (1) pour garantir une fermeture hermétique entre une barre factice (7) et un moule à lingots (5) dans une installation de moulage en continu, et ayant, dans une perspective de plan, une forme plate correspondant à celle du moule à lingots (5) où il est introduit, pourvu d'une portion intégrante (2), le long de son côté périphérique, se projetant à un angle substantiellement droit vers ledit corps plat, ladite partie de projection (2) ayant une section transversale substantiellement triangulaire diminuant en pointe vers la masse de la barre factice (7), où la partie centrale de l'élément de fermeture hermétique (1) consiste en un corps plat relativement fin pourvu d'un orifice central relativement petit (3) pour le passage des dispositifs d'accrochage (6) sortant en saillie de ladite barre factice (7), en mesure d'accrocher cette dernière au corps de moulage en continu, et en ce que l'élément de fermeture hermétique (1) possède des dimensions linéaires des côtés légèrement plus grandes que celles des côtés internes correspondants du moule à lingots, de façon à s'adapter pour être montés dans le moule à lingots (5) quand la barre factice (7) se trouve à l'extérieur de l'installation de moulage et être maintenus en position par des dispositifs de frottement avec cette dernière.
  8. Elément de fermeture hermétique selon la revendication 7, comprenant une plaque rigide (1) pourvue de dispositifs de consolidation (11) avec la barre factice (7).
  9. Elément de fermeture hermétique selon la revendication 7, comprenant une plaque flexible (1, 14) pourvue de dispositifs de consolidation (11) avec la barre factice (7).
  10. Elément de fermeture hermétique selon la revendication 8 ou 9, comprenant une pluralité de segments séparés montés le long du côté de ladite plaque.
  11. Elément de fermeture hermétique selon la revendication 8 ou 9, où lesdits dispositifs de consolidation (11) sont accrochés à ladite barre factice (7) de façon à pouvoir être dégagés.
  12. Elément de fermeture hermétique selon la revendication 9, où ladite plaque flexible (14) est pourvue d'une plaque rigide de renforcement (12).
  13. Elément de fermeture hermétique (1) pour garantir une fermeture hermétique entre une barre factice (7) et un moule à lingots (5) dans une installation de moulage en continu, et ayant, dans une perspective de plan, une forme plate correspondant à celle du moule à lingots (5) où il est introduit, pourvu d'une portion de fermeture hermétique périphérique (2), se projetant à un angle substantiellement droit vers ledit corps plat, ladite section de fermeture hermétique périphérique (2) ayant une portion transversale substantiellement triangulaire diminuant en pointe vers la masse de la barre factice (7), où la partie centrale de l'élément de fermeture hermétique (1) consiste en un corps plat relativement fin pourvu d'un orifice relativement petit (3) pour le passage des dispositifs d'accrochage (6) sortant en saillie de ladite barre factice (7), en mesure d'accrocher cette dernière au corps de moulage en continu, et en ce que ladite portion périphérique est montée le long du côté dudit corps plat et possède des dimensions linéaires des côtés légèrement plus grandes que celles des côtés internes correspondants du moule à lingots, de façon à s'adapter pour être montés dans le moule à lingots (5) quand la barre factice (7) se trouve à l'extérieur de l'installation de moulage et être maintenus en position par des dispositifs de frottement avec cette dernière.
  14. Elément de fermeture hermétique selon la revendication 13, où ladite portion de fermeture hermétique périphérique (2) se compose d'une pluralité de segments séparés (10).
  15. Utilisation dans un processus de moulage en continu d'un élément de fermeture hermétique (1) selon une revendication quelconque parmi les revendications allant de 7 à 14, qui est monté dans le moule à lingots (5) avant que la barre factice (7) ne soit introduite dans ce dernier.
EP00935181A 1999-06-10 2000-06-07 Procede pour etancheifier l'ensemble lingotiere/fausse barre d'une installation de coulee en continu, et element d'etancheification correspondant Expired - Lifetime EP1194254B1 (fr)

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 (fr) 1999-06-10 2000-06-07 Procede pour etancheifier l'ensemble lingotiere/fausse barre d'une installation de coulee en continu, et element d'etancheification correspondant

Publications (2)

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

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00935181A Expired - Lifetime EP1194254B1 (fr) 1999-06-10 2000-06-07 Procede pour etancheifier l'ensemble lingotiere/fausse barre d'une installation de coulee en continu, et element d'etancheification correspondant

Country Status (8)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009073005A1 (fr) * 2007-12-04 2009-06-11 Loma Machine, A Division Of Magnum Integrated Technologies Inc. Réservoir à eau à utiliser avec une coulée continue pour couler verticalement des brames de métal

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
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
RU2563422C2 (ru) * 2010-06-30 2015-09-20 Сименс Фаи Металз Текнолоджиз Гмбх Начальная часть, головка затравки и затравка для установки непрерывной разливки для отливки предварительного профиля
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 (fr) 2022-11-04 2024-05-10 Sms Group Gmbh Système d'étanchéité destiné à être utilisé avec une tête de barre factice d'un système de coulée continue et procédé de production d'un produit métallique au moyen d'une coulée continue à l'aide du système d'étanchéité
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

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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 (fr) * 2007-12-04 2009-06-11 Loma Machine, A Division Of Magnum Integrated Technologies Inc. Réservoir à eau à utiliser avec une coulée continue pour couler verticalement des brames de métal

Also Published As

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

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