EP2127780B1 - Dummy bar head seal system in a mould of a bar casting assembly for casting large-scale preliminary forms - Google Patents

Dummy bar head seal system in a mould of a bar casting assembly for casting large-scale preliminary forms Download PDF

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Publication number
EP2127780B1
EP2127780B1 EP08009465A EP08009465A EP2127780B1 EP 2127780 B1 EP2127780 B1 EP 2127780B1 EP 08009465 A EP08009465 A EP 08009465A EP 08009465 A EP08009465 A EP 08009465A EP 2127780 B1 EP2127780 B1 EP 2127780B1
Authority
EP
European Patent Office
Prior art keywords
dummy bar
bar head
mould
sealing
plate
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.)
Not-in-force
Application number
EP08009465A
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German (de)
French (fr)
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EP2127780A1 (en
Inventor
Thomas Meier
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 Concast AG
Original Assignee
Concast 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 Concast AG filed Critical Concast AG
Priority to ES08009465T priority Critical patent/ES2400704T3/en
Priority to EP08009465A priority patent/EP2127780B1/en
Priority to TW098116321A priority patent/TW200948511A/en
Priority to ZA200903355A priority patent/ZA200903355B/en
Priority to US12/469,804 priority patent/US8151864B2/en
Priority to MX2009005402A priority patent/MX2009005402A/en
Priority to CA002666451A priority patent/CA2666451A1/en
Priority to UAA200905101A priority patent/UA102814C2/en
Priority to CN200910203886.9A priority patent/CN101585076B/en
Priority to KR1020090045064A priority patent/KR20090122152A/en
Priority to RU2009119554/02A priority patent/RU2496602C2/en
Priority to JP2009125110A priority patent/JP5161151B2/en
Priority to BRPI0901609-0A priority patent/BRPI0901609A2/en
Publication of EP2127780A1 publication Critical patent/EP2127780A1/en
Application granted granted Critical
Publication of EP2127780B1 publication Critical patent/EP2127780B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock

Definitions

  • the invention relates to a cold extrusion head sealing system in a mold of a continuous casting for casting large-size Vorprofile, with a gap between the cold rod head and the mold sealing flat gasket, and a flat gasket at the cold strand head festhaltenden packaging plate, which has approximately the cross-sectional shape of the mold profile and the flat gasket vollumfnaturelich covered.
  • Out DE 10 2004 04633 is a starting device for a continuous casting with a sealing element between the top member and liquid steel known.
  • the disadvantage of this system is that the holder for the seal is not in the plane of the seal, displaced.
  • DE 32 30 183 describes a continuous casting plant, in particular a horizontal continuous casting plant, which has a deformable seal between the approach head and the liquid steel.
  • the disadvantage of this system is that the holder for the seal is displaceable only in the longitudinal direction.
  • EP 1 249 287 discloses a method and apparatus for starting a continuous casting plant. In this system, the attachment of the seal can be moved only in the longitudinal axis.
  • EP 0 234 299 is a cold rod head sealing system which has a refractory flat gasket. This is fastened between a connecting element and the lower part. Disadvantage is the non-displaceable connection element.
  • Continuous casting plants of this type are used, for example, to produce large so-called beam-blank formats with a double-T-profile over 800 mm in length, over 400 mm in flange width and about 120 mm in web thickness.
  • the cold strand head is known sometimes serves to close the mold before and during the Angiessvorganges down tightly.
  • the cold extrusion head with the associated packaging is mounted before casting start above the mold and then drawn into the mold until it has reached the Angiesszin. Since the packaging is rigid in the known systems, there is formed by the taper of the mold a gap on the inner shoulder of the profile. For large formats, it has an impermissible gap width. Especially in the Angiesswolf but the cold strand packaging must properly seal, to prevent melt from flowing out of the interior of the mold during casting. The previously known systems are therefore not suitable for casting of particularly large-sized profiles.
  • the invention has for its object to avoid the disadvantages mentioned above and to provide a cold strand packaging that ensures the full tightness of the cold strand packaging when casting even in very large formats.
  • the invention further provides that the packaging plate is formed in two parts, wherein both plate halves are displaceable towards Kokillenmitte and separated by a distance to each other, the width of which depends on the conicity of the mold.
  • the plate halves are drawn in the millimeter range within the distance. With appropriate dimensioning of the distance can be fully compensate in this way the oblique course of the mold.
  • the distance is formed centrally. This makes it possible to form two plate halves identical.
  • the cold strand head according to the invention has a one-piece packaging plate which covers both plate halves and which is clamped to the cold strand head.
  • the plate halves are thus kept safe in terms of area by the one-piece packaging plate, without affecting their displaceability.
  • the one-piece packaging plate is conveniently clamped to the cold rod head with tie rods attached thereto.
  • the tie rods also serve in a known manner to absorb the tensile forces acting between the cold strand and the hot strand.
  • the invention provides that the plate halves are provided with holes formed as elongated holes for the tie rods.
  • the one-piece packaging plate according to the invention is provided with a longitudinally extending reinforcing rib, whereby its rigidity is improved, in particular in the web area.
  • the in the FIGS. 1 to 8 cold strand head 1 shown is equipped with an inventive cold strands packaging 2. He is shown in the starting position before the casting process, in which he concludes the interior of a mold 3 for casting a large-sized beam blank double T-profile of about 800 mm wide, 400 mm flange width and 120 mm web thickness bottom. Above the cold strand head 1 there is at least one casting tube 4 projecting into the mold 3, through which molten steel is poured into the interior of the mold 3 during casting. Below the cold strand head 1, this is coupled to an extraction device 5, by means of which the strand is pulled out of the mold 3.
  • the cold strand packaging 2 consists of a flat gasket 6 and two packaging plates 7 and 8, wherein the packaging plate 7 is divided into two symmetrically to each other in a plane plate halves 7a, 7b, between which a centrally arranged, continuous distance 9 of about 10 to 20 mm is present.
  • the packaging plate 8 is formed in one piece and rectangular and covers the plate halves 7a, 7b in the web area.
  • the packaging plates 7 and 8 are made of sheet steel with about 8-15 mm sheet thickness.
  • the flat gasket 6 has the same outer contour as the inner contour of the mold, but with a circumferentially small excess of about 15 to 25 mm. It can be made of felt of about 6-12 mm thickness, but also of any other material with comparable properties, in particular mechanical strength, elasticity and heat resistance.
  • the cold strand package 2 is mounted on the cold strand head 1 outside of the mold 3.
  • the flat gasket 6 is clamped overhanging between the cold strand head 1 and the plate halves 7a, 7b.
  • the protruding flat gasket bends around the outer edge of the plate halves 7a, 7b against the inner walls of the mold and seals the 4-8 mm wide gap between the packaging plates and mold around, so that no molten steel flows out during the gushing process.
  • the one-piece packaging plate 8 is in turn pressed against the two plate halves 7a, 7b and has together with them the task to absorb the forces acting on the gasket 6 during insertion of the entire profile area including the web area.
  • Tie rod 10, 11 in the form of bolts 12 which is used with the lower part 13 in the cold rod head 1 and locked with a cross bolt, and an upper threaded part 14, on which a nut 15 is screwed, are used to fasten the cold strand package 2 to the cold strand head 1.
  • the plate halves 7a, 7b have slots 16 and 17 as through holes for the tie rods 10 and 11.
  • the nuts 15 are screwed against Andschreibbüchsen 18, which in turn are pressed against the one-piece packaging plate 8.
  • the tie rods 10 and 11 also take over the tensile forces that are effective between hot strand and cold strand when pulling out the strand.
  • the one-piece packaging plate 8 is provided with a longitudinally extending reinforcing rib 23, which gives the packaging plate 8 a higher rigidity in the central region.
  • the reinforcing rib 23 extends between the two tie rods 10 and 11.
  • Fig. 7 shows the mold 3 in section along the line VII - VII according to Fig. 6 and schematically the cold strand package 2 in the position 2.1 before retraction, in the position 2.2 immediately after entering the mold 3 and additionally in the position 2.3 when reaching the lower end of the mold 3, as this also increases in Fig. 8 is illustrated.
  • the flat gasket 6 protrudes laterally all the way to the packaging plate 7 located above it. As a result, it is from the mold 3 evenly angled as a tab 6 'and is thus located between the adjusting packaging plate 7 and the mold and forms a secure seal all around.
  • the adjustable packaging plate 7 In the downward displacement of the cold strand head 1 in the mold 3, the adjustable packaging plate 7 is always moved by the voltage applied to the mold flat gasket to Kokillenmitte. It is thus at least causes the sealing gap between it and the packaging plate 7 remains uniform.
  • the packaging plate 7 In the position 2.2 immediately after the retraction of the cold strand package 2, the packaging plate 7 is pushed outward in relation to the shorter packaging plate 8, however, in the position 2.3, this packaging plate 7 is displaced comparatively more inwardly.
  • the retractability of the packaging plate 7 it is also possible within the scope of the invention to provide other elements which are comparable in terms of effect, such as yielding plate regions or the like. It is also possible within the scope of the invention to form the distance 9 differently than uniformly, depending on the profile geometry, or to place it otherwise than centrally in the packaging plate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Gasket Seals (AREA)
  • Packages (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

Die Erfindung betrifft ein Kaltstrangkopf-Abdichtsystem in einer Kokille einer Stranggiessanlage zum Giessen grossformatiger Vorprofile, mit einer den Spalt zwischen dem Kaltstrangkopf und der Kokille abdichtenden Flachdichtung, sowie einer die Flachdichtung am Kaltstrangkopf festhaltenden Verpackungsplatte, welche annähernd die Querschnittsform des Kokillenprofils aufweist und die Flachdichtung vollumfänglich überdeckt.The invention relates to a cold extrusion head sealing system in a mold of a continuous casting for casting large-size Vorprofile, with a gap between the cold rod head and the mold sealing flat gasket, and a flat gasket at the cold strand head festhaltenden packaging plate, which has approximately the cross-sectional shape of the mold profile and the flat gasket vollumfänglich covered.

Aus DE 10 2004 04633 ist eine Anfahrvorrichtung für eine Stranggiessanlage mit einem Dichtelement zwischen Kopfglied und flüssigen Stahlbekannt. Der Nachteil dieser Anlage ist, dass die Halterung für die Dichtung nicht in der Ebene, der Dichtung, verschiebbar ist.Out DE 10 2004 04633 is a starting device for a continuous casting with a sealing element between the top member and liquid steel known. The disadvantage of this system is that the holder for the seal is not in the plane of the seal, displaced.

In DE 32 30 183 wird eine Stranggiessanlage, insbesondere eine Horizontalstranggiessanlage, beschrieben, welche eine verformbare Dichtung zwischen dem Anfahrtskopf und dem flüssigen Stahl aufweist. Der Nachteil dieser Anlage ist, dass die Halterung für die Dichtung nur in Längsrichtung verschiebbar ist.In DE 32 30 183 describes a continuous casting plant, in particular a horizontal continuous casting plant, which has a deformable seal between the approach head and the liquid steel. The disadvantage of this system is that the holder for the seal is displaceable only in the longitudinal direction.

EP 1 249 287 offenbart eine Verfahren und Vorrichtung zum Anfahren einer Stranggiessanlage. In dieser Anlage kann die Befestigung der Dichtung nur in der Längsachse verschoben werden. EP 1 249 287 discloses a method and apparatus for starting a continuous casting plant. In this system, the attachment of the seal can be moved only in the longitudinal axis.

US 3 587 716 beschreibt eine Vorrichtung für eine Stranggiessanlage in horizontaler Richtung. Die Dichtung ist eingeklemmt zwischen zwei Platten welche nur in der Längsrichtung verschiebbar sind. Dieser Nachteil führt bei grossen Kokillen zu Lecks. US 3,587,716 describes a device for a continuous casting in the horizontal direction. The seal is clamped between two plates which are only displaceable in the longitudinal direction. This disadvantage leads to large molds to leaks.

In US 3 262 161 wird ein Anfahrtskopf für eine Stranggiessanlage beschrieben. Bei der Dichtung ist dessen Halterung nicht verschiebbar.In US 3,262,161 An approach head for a continuous casting plant is described. When the seal whose holder is not displaced.

Aus EP 0 234 299 ist ein Kaltstrangkopf-Dichtsystem bekannt welches eine feuerfeste Flachdichtung aufweist. Diese wird zwischen einem Verbindungselement und dem Unterteil befestigt. Nachteil ist das nicht verschiebbare Verbindungselement.Out EP 0 234 299 is a cold rod head sealing system is known which has a refractory flat gasket. This is fastened between a connecting element and the lower part. Disadvantage is the non-displaceable connection element.

Stranggiessanlagen dieser Art werden beispielsweise zum Erzeugen grosser sogenannter Beam-Blank-Formate mit einem Doppel-T-Profil von über 800 mm Länge, über 400 mm Flanschbreite und etwa 120 mm Stegdicke eingesetzt. Der Kaltstrangkopf dient bekanntlich mitunter dazu, die Kokille vor und während des Angiessvorganges unten dicht abzuschliessen.Continuous casting plants of this type are used, for example, to produce large so-called beam-blank formats with a double-T-profile over 800 mm in length, over 400 mm in flange width and about 120 mm in web thickness. The cold strand head is known sometimes serves to close the mold before and during the Angiessvorganges down tightly.

Beim Giessen wird die Schmelze durch ein Giessrohr in den Innenraum der Kokille eingefüllt und sie erstarrt dort bis zu einem Grad, bei dem man sie mit dem Kaltstrangkopf als Warmstrang abziehen kann. Zur Kompensation der beim Erstarrungsprozess entstehenden Schrumpfung des Stranges in der Kokille verläuft letztere eine Konizität bildend von oben nach unten leicht schräg. Da grosse Beam-Blank-Formate langsamer gegossen werden als kleinere Formate, benötigt man für sie eine relativ grosse Konizität in der Kokille. Der Kokilleneintritt ist deshalb bei solchen Formaten um ca. 6-12 mm grösser als der Austritt.When pouring the melt is poured through a pouring tube into the interior of the mold and it solidifies there to a degree where they can be deducted with the cold rod head as a hot strand. To compensate for the shrinkage of the strand in the mold during the solidification process, the latter forms a conical taper slightly sloping from top to bottom. Since large beam blank formats are cast more slowly than smaller formats, they require a relatively large conicity in the mold. The Kokilleneintritt is therefore in such formats by about 6-12 mm larger than the exit.

Der Kaltstrangkopf mit der zugehörigen Verpackung wird vor Giessbeginn oberhalb der Kokille montiert und anschliessend In die Kokille eingezogen, bis er darin die Angiessstellung erreicht hat. Da die Verpackung bei den bekannten Systemen starr ist, entsteht dort durch die Konizität der Kokille ein Spalt an der inneren Schulter des Profils. Bei grossen Formaten hat er eine unzulässige Spaltbreite. Gerade in der Angiessstellung muss aber die Kaltstrangverpackung einwandfrei dichten, um zu verhindern, dass beim Angiessen Schmelze aus dem Innenraum der Kokille herausfliesst. Die bisher bekannten Systeme eignen sich daher nicht zum Giessen von besonders grossformatigen Profilen.The cold extrusion head with the associated packaging is mounted before casting start above the mold and then drawn into the mold until it has reached the Angiessstellung. Since the packaging is rigid in the known systems, there is formed by the taper of the mold a gap on the inner shoulder of the profile. For large formats, it has an impermissible gap width. Especially in the Angiessstellung but the cold strand packaging must properly seal, to prevent melt from flowing out of the interior of the mold during casting. The previously known systems are therefore not suitable for casting of particularly large-sized profiles.

Der Erfindung liegt die Aufgabe zugrunde, die oben genannten Nachteile zu vermeiden und eine Kaltstrangverpackung zu schaffen, die beim Angiessen auch bei besonders grossen Formaten die volle Dichtigkeit der Kaltstrangverpackung gewährleistet.The invention has for its object to avoid the disadvantages mentioned above and to provide a cold strand packaging that ensures the full tightness of the cold strand packaging when casting even in very large formats.

Diese Aufgabe wird erfindungsgemäss durch ein Kaltstrang Kopf-Abdichtsystem gemäß Anspruch 1 gelöst, wobei die die Flachdichtung festhaltende Verpackungsplatte um einen von der Konizität der Kokille abhängigen Betrag zur Kokillenmitte hin verstellbar ist.This object is achieved according to the invention by a cold strand head-sealing system according to claim 1, wherein the flat seal holding the packaging plate is adjustable by a dependent of the conicity of the mold amount to Kokillenmitte out.

Dadurch ist es möglich, beim Einziehen des Kaltstrangkopfes den schrägen Verlauf der Kokille mit der sich zusammenziehenden Verpackungsplatte soweit auszugleichen, dass der Dichtspalt zwischen Verpackungsplatte und Kokille allseits gleichmässig bleibt. Dadurch kann ihn die Flachdichtung auch beim Giessen besonders grosser Formate voll abdichten.This makes it possible to compensate when pulling the cold strand head the oblique course of the mold with the contracting packaging plate so far that the sealing gap between the packaging plate and mold remains well on all sides. As a result, the flat gasket can also completely seal it when casting particularly large formats.

Zwecks einer einfachen Konstruktion und einer sicheren Arbeitsweise sieht die Erfindung ferner vor, dass die Verpackungsplatte zweiteilig ausgebildet ist, wobei beide Plattenhälften zur Kokillenmitte hin verschiebbar sind und durch einen Abstand zueinander getrennt sind, dessen Breite von der Konizität der Kokille abhängig ist. Beim Einziehen des Kaltstrangkopfes in die Kokille werden die Plattenhälften im Millimeterbereich innerhalb des Abstandes eingezogen. Bei entsprechender Bemessung des Abstandes kann man auf diese Weise den schrägen Verlauf der Kokille vollständig kompensieren.For the purpose of a simple construction and a safe operation, the invention further provides that the packaging plate is formed in two parts, wherein both plate halves are displaceable towards Kokillenmitte and separated by a distance to each other, the width of which depends on the conicity of the mold. When drawing the cold strand head into the mold, the plate halves are drawn in the millimeter range within the distance. With appropriate dimensioning of the distance can be fully compensate in this way the oblique course of the mold.

Zur Vereinfachung der Fertigung ist es ebenfalls von Vorteil, wenn der Abstand mittig gebildet ist. Dadurch ist es möglich, beiden Plattenhälften identisch auszubilden.To simplify the production, it is also advantageous if the distance is formed centrally. This makes it possible to form two plate halves identical.

Im Sinne einer stabilen Halterung der verschiebbaren Plattenhälften weist der Kaltstrangkopf erfindungsgemäss eine beide Plattenhälften überdeckende einteilige Verpackungsplatte auf, die an den Kaltstrangkopf geklemmt ist. Die Plattenhälften sind somit flächenmässig durch die einteilige Verpackungsplatte sicher gehalten, ohne ihre Verschiebbarkeit zu beeinträchtigen.In the sense of a stable mounting of the displaceable plate halves, the cold strand head according to the invention has a one-piece packaging plate which covers both plate halves and which is clamped to the cold strand head. The plate halves are thus kept safe in terms of area by the one-piece packaging plate, without affecting their displaceability.

Die einteilige Verpackungsplatte ist zweckmässigerweise an den Kaltstrangkopf mit auf diesem befestigten Zugankern geklemmt. Die Zuganker dienen auch in bekannter Weise zur Aufnahme der zwischen Kaltstrang und Warmstrang wirkenden Zugkräfte.The one-piece packaging plate is conveniently clamped to the cold rod head with tie rods attached thereto. The tie rods also serve in a known manner to absorb the tensile forces acting between the cold strand and the hot strand.

Zur freien Beweglichkeit der verschiebbaren Plattenhälften im Bereich der Zuganker sieht die Erfindung vor, dass die Plattenhälften mit als Langlöcher ausgebildeten Durchgangslöchern für die Zuganker versehen sind.For freedom of movement of the displaceable plate halves in the region of the tie rods, the invention provides that the plate halves are provided with holes formed as elongated holes for the tie rods.

Zwecks einer einwandfreien Aufnahme der wirkenden Kräfte beim Einziehen der Flachdichtung ist die einteilige Verpackungsplatte erfindungsgemäss mit einer in Längsrichtung verlaufenden Verstärkungsrippe versehen, womit ihre Steifigkeit insbesondere im Stegbereich verbessert wird.For the purpose of a perfect absorption of the acting forces when pulling in the flat gasket, the one-piece packaging plate according to the invention is provided with a longitudinally extending reinforcing rib, whereby its rigidity is improved, in particular in the web area.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher beschrieben. Es zeigen:

Fig. 1
eine erfindungsgemässe Kaltstrangverpackung, in der Seitenansicht und in der Angiessstellung dargestellt,
Fig. 2
die Kaltstrangverpackung nach Fig. 1 in Draufsicht,
Fig. 3
die Flachdichtung des Kaltstrangkopfes nach Fig. 1 in Draufsicht,
Fig. 4
die zweiteilige Verpackungsplatte des Kaltstrangkopfes nach Fig. 1 ebenfalls in Draufsicht,
Fig. 5
die einteilige Verpackungsplatte des Kaltstrangkopfes nach Fig. 1 von oben,
Fig. 6
die Kokille gemäss Fig. 1 schematisch in Draufsicht dargestellt,
Fig. 7
schematisch einen Schnitt durch die Kokille entlang der Linie VII - VII in Fig. 7 mit einer Veranschaulichung der Kaltstrangverpackung in verschiedenen Positionen, und
Fig. 8
schematisch einen Teilschnitt der Kokille und einem Teil des Kaltstrangkopfes gemäss Fig. 7.
The invention will be described below with reference to an embodiment with reference to the drawings. Show it:
Fig. 1
an inventive cold strand packaging, shown in the side view and in the Angiessstellung,
Fig. 2
the cold strand packaging after Fig. 1 in plan view,
Fig. 3
the flat seal of the cold strand head after Fig. 1 in plan view,
Fig. 4
the two-piece packaging plate of the cold strand head after Fig. 1 also in plan view,
Fig. 5
the one-piece packaging plate of the cold rod head after Fig. 1 from above,
Fig. 6
the mold according to Fig. 1 schematically shown in plan view,
Fig. 7
schematically a section through the mold along the line VII - VII in Fig. 7 with an illustration of the dummy bar packing in different positions, and
Fig. 8
schematically a partial section of the mold and a part of the cold rod head according to Fig. 7 ,

Der in den Figuren 1 bis 8 gezeigte Kaltstrangkopf 1 ist mit einer erfindungsgemässen Kaltstrangverpackung 2 ausgestattet. Er ist in der Startstellung vor Beginn des Giessvorganges dargestellt, in welcher er den Innenraum einer Kokille 3 zum Giessen eines grossformatigen Beam-Blank Doppel-T-Profils von ca. 800 mm Breite, 400 mm Flanschbreite und 120 mm Stegdicke unten abschliesst. Oberhalb des Kaltstrangkopfes 1 befindet sich mindestens ein in die Kokille 3 ragendes Giessrohr 4, durch welches beim Giessen Stahlschmelze in den Innenraum der Kokille 3 eingefüllt wird. Unterhalb des Kaltstrangkopfes 1 ist dieser an einer Ausziehvorrichtung 5 angekoppelt, mittels derer der Strang aus der Kokille 3 gezogen wird.The in the FIGS. 1 to 8 cold strand head 1 shown is equipped with an inventive cold strands packaging 2. He is shown in the starting position before the casting process, in which he concludes the interior of a mold 3 for casting a large-sized beam blank double T-profile of about 800 mm wide, 400 mm flange width and 120 mm web thickness bottom. Above the cold strand head 1 there is at least one casting tube 4 projecting into the mold 3, through which molten steel is poured into the interior of the mold 3 during casting. Below the cold strand head 1, this is coupled to an extraction device 5, by means of which the strand is pulled out of the mold 3.

Wie insbesondere aus den Figuren 1 und 2 ersichtlich, besteht die Kaltstrangverpackung 2 aus einer Flachdichtung 6 und zwei Verpackungsplatten 7 und 8, wobei die Verpackungsplatte 7 in zwei symmetrisch zueinander in einer Ebene liegenden Plattenhälften 7a, 7b geteilt ist, zwischen denen ein mittig angeordneter, durchgehender Abstand 9 von ca. 10 bis 20 mm vorhanden ist. Die Verpackungsplatte 8 dagegen ist einteilig und rechteckig ausgebildet und überdeckt die Plattenhälften 7a, 7b im Stegbereich. Die Verpackungsplatten 7 und 8 sind aus Stahlblech mit ca. 8-15 mm Blechdicke hergestellt.As in particular from the Figures 1 and 2 can be seen, the cold strand packaging 2 consists of a flat gasket 6 and two packaging plates 7 and 8, wherein the packaging plate 7 is divided into two symmetrically to each other in a plane plate halves 7a, 7b, between which a centrally arranged, continuous distance 9 of about 10 to 20 mm is present. The packaging plate 8, however, is formed in one piece and rectangular and covers the plate halves 7a, 7b in the web area. The packaging plates 7 and 8 are made of sheet steel with about 8-15 mm sheet thickness.

Wie aus Fig. 3 ersichtlich, hat die Flachdichtung 6 die gleiche Aussenkontur wie die Innenkontur der Kokille, jedoch mit einem umfänglich kleinen Übermass von ca. 15 bis 25 mm. Sie kann aus Filz mit einer Dicke von ca. 6-12 mm, aber auch ohne weiteres aus jedem anderen Material mit vergleichbaren Eigenschaften, insbesondere hinsichtlich der mechanischen Festigkeit, der Elastizität und der Hitzebeständigkeit hergestellt werden.How out Fig. 3 can be seen, the flat gasket 6 has the same outer contour as the inner contour of the mold, but with a circumferentially small excess of about 15 to 25 mm. It can be made of felt of about 6-12 mm thickness, but also of any other material with comparable properties, in particular mechanical strength, elasticity and heat resistance.

Die Kaltstrangverpackung 2 wird am Kaltstrangkopf 1 ausserhalb der Kokille 3 montiert. Dabei wird die Flachdichtung 6 zwischen dem Kaltstrangkopf 1 und den Plattenhälften 7a, 7b überstehend eingeklemmt. Beim Einziehen des Kaltstrangkopfes 1 in die Kokille biegt sich dann die überstehende Flachdichtung um den Aussenrand der Plattenhälften 7a, 7b gegen die Innenwände der Kokille und dichtet den ca. 4-8 mm breiten Spalt zwischen Verpackungsplatten und Kokille rundum ab, damit aus dieser keine Stahlschmelze während des Angiessens herausfliesst.The cold strand package 2 is mounted on the cold strand head 1 outside of the mold 3. In this case, the flat gasket 6 is clamped overhanging between the cold strand head 1 and the plate halves 7a, 7b. When pulling the cold strand head 1 into the mold then the protruding flat gasket bends around the outer edge of the plate halves 7a, 7b against the inner walls of the mold and seals the 4-8 mm wide gap between the packaging plates and mold around, so that no molten steel flows out during the gushing process.

Die einteilige Verpackungsplatte 8 ist ihrerseits gegen die beiden Plattenhälften 7a, 7b angedrückt und hat zusammen mit ihnen die Aufgabe, die beim Einziehen der Flachdichtung 6 wirkenden Kräfte im gesamten Profilbereich einschliesslich des Stegbereiches aufzunehmen.The one-piece packaging plate 8 is in turn pressed against the two plate halves 7a, 7b and has together with them the task to absorb the forces acting on the gasket 6 during insertion of the entire profile area including the web area.

Zur Befestigung der Kaltstrangverpackung 2 am Kaltstrangkopf 1 dienen Zuganker 10, 11 in Gestalt von Bolzen 12 welche mit dem unteren Teil 13 in den Kaltstrangkopf 1 eingesetzt und mit einem Querbolzen verriegelt wird, sowie einem oberen Gewindeteil 14, auf dem eine Mutter 15 aufgeschraubt ist. Die Plattenhälften 7a, 7b haben Langlöcher 16 bzw. 17 als Durchgangslöcher für die Zuganker 10 und 11. Die Muttern 15 sind gegen Andrückbüchsen 18 festgeschraubt, die ihrerseits gegen die einteilige Verpackungsplatte 8 angedrückt sind. Beim Montieren ist auf die Verschiebbarkeit der Verpackungsplatten zu achten, d.h. man darf die Muttern 15 nicht zu fest anziehen, ausser man legt einen Distanzring zwischen die Platten. Die Zuganker 10 und 11 übernehmen auch die Zugkräfte, die zwischen Warmstrang und Kaltstrang beim Ausziehen des Stranges wirksam sind.Tie rod 10, 11 in the form of bolts 12 which is used with the lower part 13 in the cold rod head 1 and locked with a cross bolt, and an upper threaded part 14, on which a nut 15 is screwed, are used to fasten the cold strand package 2 to the cold strand head 1. The plate halves 7a, 7b have slots 16 and 17 as through holes for the tie rods 10 and 11. The nuts 15 are screwed against Andrückbüchsen 18, which in turn are pressed against the one-piece packaging plate 8. When mounting, pay attention to the displaceability of the packaging plates, i. Do not overtighten the nuts 15 unless you place a spacer between the plates. The tie rods 10 and 11 also take over the tensile forces that are effective between hot strand and cold strand when pulling out the strand.

Um die beiden Plattenhälften 7a, 7b insbesondere im Stegbereich sicher zu halten, ist die einteilige Verpackungsplatte 8 mit einer in Längsrichtung verlaufenden Verstärkungsrippe 23 versehen, die der Verpackungsplatte 8 eine höhere Steifigkeit im mittleren Bereich verleiht. Die Verstärkungsrippe 23 erstreckt sich zwischen den beiden Zugankern 10 und 11.In order to securely hold the two plate halves 7a, 7b in particular in the web area, the one-piece packaging plate 8 is provided with a longitudinally extending reinforcing rib 23, which gives the packaging plate 8 a higher rigidity in the central region. The reinforcing rib 23 extends between the two tie rods 10 and 11.

Für die Steifigkeit der Platte 8 können noch nicht näher dargestellte Verstärkungen vorgesehen sein.For the rigidity of the plate 8 reinforcements not shown in detail can be provided.

Fig. 7 zeigt die Kokille 3 im Schnitt entlang der Linie VII - VII gemäss Fig. 6 und schematisch die Kaltstrangverpackung 2 in der Position 2.1 vor dem Einfahren, in der Position 2.2 unmittelbar nach dem Einfahren in die Kokille 3 und zusätzlich in der Position 2.3 beim Erreichen des unteren Endes der Kokille 3, wie dies vergrössert auch in Fig. 8 veranschaulicht ist. Fig. 7 shows the mold 3 in section along the line VII - VII according to Fig. 6 and schematically the cold strand package 2 in the position 2.1 before retraction, in the position 2.2 immediately after entering the mold 3 and additionally in the position 2.3 when reaching the lower end of the mold 3, as this also increases in Fig. 8 is illustrated.

Die Flachdichtung 6 steht rundum zu der oberhalb dieser befindlichen Verpackungsplatte 7 seitlich vor. Hierdurch wird sie von der Kokille 3 gleichmässig als Lasche 6' abgewinkelt und befindet sich damit zwischen der sich verstellenden Verpackungsplatte 7 und der Kokille und bildet rundum eine sichere Abdichtung. Bei der Abwärtsverschiebung des Kaltstrangkopfes 1 in der Kokille 3 wird die verstellbare Verpackungsplatte 7 durch die rundum an der Kokille anliegende Flachdichtung stets zur Kokillenmitte hin verschoben. Es wird damit gleichsam bewirkt, dass der Dichtspalt zwischen ihr und der Verpackungsplatte 7 gleichmässig bleibt. In der Position 2.2 unmittelbar nach dem Einfahren der Kaltstrangverpackung 2 befindet sich die Verpackungsplatte 7 im Verhältnis zu der kürzeren Verpackungsplatte 8 nach aussen geschoben, indessen in der Position 2.3 ist diese Verpackungsplatte 7 vergleichsweise mehr nach innen verschoben.The flat gasket 6 protrudes laterally all the way to the packaging plate 7 located above it. As a result, it is from the mold 3 evenly angled as a tab 6 'and is thus located between the adjusting packaging plate 7 and the mold and forms a secure seal all around. In the downward displacement of the cold strand head 1 in the mold 3, the adjustable packaging plate 7 is always moved by the voltage applied to the mold flat gasket to Kokillenmitte. It is thus at least causes the sealing gap between it and the packaging plate 7 remains uniform. In the position 2.2 immediately after the retraction of the cold strand package 2, the packaging plate 7 is pushed outward in relation to the shorter packaging plate 8, however, in the position 2.3, this packaging plate 7 is displaced comparatively more inwardly.

Dadurch ist sichergestellt, dass in der dargestellten Angiessstellung 2.3 die Flachdichtung 6 mit der rundum gebildeten Lasche 6' den Dichtspalt rundum und insbesondere auch an der inneren Schulter des Profils rundum abdichtet.This ensures that in the illustrated Angiessstellung 2.3, the flat gasket 6 with the all-around tab 6 ', the sealing gap around and in particular also on the inner shoulder of the profile completely seals.

Hinsichtlich der Einziehbarkeit der Verpackungsplatte 7 ist es auch im Rahmen der Erfindung möglich, andere wirkungsmässig vergleichbare Elemente, wie etwa nachgiebige Plattenbereiche oder dergleichen vorzusehen. Es ist auch im Rahmen der Erfindung möglich, den Abstand 9 je nach Profilgeometrie anders als gleichmässig auszubilden bzw. anders als mittig in der Verpackungsplatte zu platzieren.With regard to the retractability of the packaging plate 7, it is also possible within the scope of the invention to provide other elements which are comparable in terms of effect, such as yielding plate regions or the like. It is also possible within the scope of the invention to form the distance 9 differently than uniformly, depending on the profile geometry, or to place it otherwise than centrally in the packaging plate.

Claims (7)

  1. System for sealing a dummy bar head in a mould of a continuous casting plant for casting large-format preliminary sections, with a flat gasket (6) sealing the gap between the dummy bar head and the mould, and a packing plate (7) fixing the flat gasket onto the dummy bar head, being clamped by tension rods (10, 11), which are fastened on the dummy bar, and having the cross-sectional form of the mould profile and over it the flat gasket (6) projects laterally all around, characterised in that
    the packing plate (7) having two plate halves (7a, 7b) lying in relation to each other in a plane, which are separated from each other by a space (9) and are displaceable in relation to the formed plane of the packing plates in dependence to the conicity of the mould slightly angular from the top down towards the centre of the mould.
  2. System for sealing a dummy bar head according to claim 1, characterised in that the packing plate (7) consists of the two plate halves (7a, 7b) lying symmetrically in relation to each other in a plane, which are separated from each other by a space (9), whose minimal width is a function of the conicity of the mould (3).
  3. System for sealing a dummy bar head according to claim 1, characterised in that the flat gasket (6) projects laterally all around the packing plate (7) located above it, and it is thereby evenly bent downwards by the mould (3) and is positioned between the packing plate (7) and the mould (3) and forms a secure seal all around.
  4. System for sealing a dummy bar head according to one of the claims 2 and 3, characterised in that a one-piece packing plate (8) is provided, which is mounted on the dummy bar head (1) and covers the two-part packing plate (7).
  5. System for sealing a dummy bar head according to claim 4, characterised in that the one-piece packing plate (8) is mounted against the dummy bar head (1) with tension rods (10, 11) affixed thereto.
  6. System for sealing a dummy bar head according to claim 5, characterised in that the plate halves (7a, 7b) of the two-piece packing plate (7) are provided with through holes (16, 17) in the form of slots for the tension rods (10, 11).
  7. System for sealing a dummy bar head according to one of the claims 4 to 6, characterised in that the one-piece packing plate (8) is provided with a reinforcing rib (23) running in longitudinal direction.
EP08009465A 2008-05-23 2008-05-23 Dummy bar head seal system in a mould of a bar casting assembly for casting large-scale preliminary forms Not-in-force EP2127780B1 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
ES08009465T ES2400704T3 (en) 2008-05-23 2008-05-23 Cold bar head sealing system in a shell of a continuous casting installation for casting large format preliminary profiles
EP08009465A EP2127780B1 (en) 2008-05-23 2008-05-23 Dummy bar head seal system in a mould of a bar casting assembly for casting large-scale preliminary forms
ZA200903355A ZA200903355B (en) 2008-05-23 2009-05-15 System for sealing a dummy bar head in a mould of a continuous casting plant for casting large-format preliminary sections
TW098116321A TW200948511A (en) 2008-05-23 2009-05-15 System for sealing a dummy bar head in a mould of a continuous casting plant for casting large-format preliminary sections
MX2009005402A MX2009005402A (en) 2008-05-23 2009-05-21 Dummy bar head seal system in a mould of a bar casting assembly for casting large-scale preliminary forms.
CA002666451A CA2666451A1 (en) 2008-05-23 2009-05-21 System for sealing a dummy bar head in a mould of a continuous casting plant for casting large-format preliminary sections
US12/469,804 US8151864B2 (en) 2008-05-23 2009-05-21 System for sealing a dummy bar head in a mould of a continuous casting plant for casting large-format preliminary sections
CN200910203886.9A CN101585076B (en) 2008-05-23 2009-05-22 Dummy bar head seal system in a mould of a bar casting assembly for casting large-scale preliminary forms
KR1020090045064A KR20090122152A (en) 2008-05-23 2009-05-22 System for sealing a dummy bar head in a mould of a continuous casting plant for casting large-format preliminary sections
RU2009119554/02A RU2496602C2 (en) 2008-05-23 2009-05-22 System for compaction of dummy bar head in continuous casting mould for casting large-size billets
UAA200905101A UA102814C2 (en) 2008-05-23 2009-05-22 System for sealing dummy bar head in mould of continuous casting plant for casting large-format preliminary sections
JP2009125110A JP5161151B2 (en) 2008-05-23 2009-05-25 System for sealing dummy bar heads in molds of continuous casting equipment for casting large pre-slabs
BRPI0901609-0A BRPI0901609A2 (en) 2008-05-23 2009-05-25 system for sealing a push bar head in a mold of a continuous casting plant to fuse large format preliminary sections

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08009465A EP2127780B1 (en) 2008-05-23 2008-05-23 Dummy bar head seal system in a mould of a bar casting assembly for casting large-scale preliminary forms

Publications (2)

Publication Number Publication Date
EP2127780A1 EP2127780A1 (en) 2009-12-02
EP2127780B1 true EP2127780B1 (en) 2012-12-05

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EP08009465A Not-in-force EP2127780B1 (en) 2008-05-23 2008-05-23 Dummy bar head seal system in a mould of a bar casting assembly for casting large-scale preliminary forms

Country Status (13)

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US (1) US8151864B2 (en)
EP (1) EP2127780B1 (en)
JP (1) JP5161151B2 (en)
KR (1) KR20090122152A (en)
CN (1) CN101585076B (en)
BR (1) BRPI0901609A2 (en)
CA (1) CA2666451A1 (en)
ES (1) ES2400704T3 (en)
MX (1) MX2009005402A (en)
RU (1) RU2496602C2 (en)
TW (1) TW200948511A (en)
UA (1) UA102814C2 (en)
ZA (1) ZA200903355B (en)

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DE102021213770A1 (en) 2021-12-03 2023-06-07 Sms Group Gmbh Sealing system for a continuous casting plant
DE102023210885A1 (en) 2022-11-04 2024-05-08 Sms Group Gmbh Sealing system for use with a cold strand head of a continuous casting plant and method for producing a metallic product by continuous casting using the sealing system
WO2024094846A1 (en) 2022-11-04 2024-05-10 Sms Group Gmbh Sealing system for use with a dummy bar head of a continuous casting system and method for producing a metal product by means of continuous casting using the sealing system

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WO2012000830A1 (en) 2010-06-30 2012-01-05 Siemens Vai Metals Technologies Gmbh Initial casting part, dummy bar head, and dummy bar for a continuous casting machine for casting preliminary profiles
KR101403588B1 (en) * 2012-06-26 2014-06-03 주식회사 포스코 Apparatus for guiding dummy bar inserted in to mould
CN103252468A (en) * 2013-06-03 2013-08-21 中冶赛迪工程技术股份有限公司 Device and method of H-shaped parison continuous casting machine online dummy ingot
CN105195696A (en) * 2015-11-06 2015-12-30 内蒙古包钢钢联股份有限公司 Dummy ingot sealing method capable of preventing casting leakage of shaped blank
CN110508769B (en) * 2019-09-25 2021-08-20 珠海大华新材料有限公司 Copper alloy vacuum water-cooling continuous casting equipment
EP3797897A1 (en) * 2019-09-26 2021-03-31 Sarralle Equipos Siderurgicos, S.L. Sealing device of the dummy bar of a continuous casting machine and associated assembly process

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WO2023099141A1 (en) 2021-12-03 2023-06-08 Sms Group Gmbh Sealing system for a continuous casting plant
DE102023210885A1 (en) 2022-11-04 2024-05-08 Sms Group Gmbh Sealing system for use with a cold strand head of a continuous casting plant and method for producing a metallic product by continuous casting using the sealing system
WO2024094846A1 (en) 2022-11-04 2024-05-10 Sms Group Gmbh Sealing system for use with a dummy bar head of a continuous casting system and method for producing a metal product by means of continuous casting using the sealing system

Also Published As

Publication number Publication date
RU2009119554A (en) 2010-11-27
ZA200903355B (en) 2010-03-31
RU2496602C2 (en) 2013-10-27
MX2009005402A (en) 2009-11-26
KR20090122152A (en) 2009-11-26
US8151864B2 (en) 2012-04-10
US20100132909A1 (en) 2010-06-03
JP2009279655A (en) 2009-12-03
EP2127780A1 (en) 2009-12-02
JP5161151B2 (en) 2013-03-13
CN101585076A (en) 2009-11-25
CA2666451A1 (en) 2009-11-23
TW200948511A (en) 2009-12-01
CN101585076B (en) 2014-04-23
UA102814C2 (en) 2013-08-27
ES2400704T3 (en) 2013-04-11
BRPI0901609A2 (en) 2011-01-25

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