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EP0910681A1 - Device for hot-dip coating metal band - Google Patents

Device for hot-dip coating metal band

Info

Publication number
EP0910681A1
EP0910681A1 EP97931704A EP97931704A EP0910681A1 EP 0910681 A1 EP0910681 A1 EP 0910681A1 EP 97931704 A EP97931704 A EP 97931704A EP 97931704 A EP97931704 A EP 97931704A EP 0910681 A1 EP0910681 A1 EP 0910681A1
Authority
EP
European Patent Office
Prior art keywords
channel
strip
coating
material according
band
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.)
Granted
Application number
EP97931704A
Other languages
German (de)
French (fr)
Other versions
EP0910681B1 (en
Inventor
Aribert Fligge
Klaus Frommann
Walter Ottersbach
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
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0910681A1 publication Critical patent/EP0910681A1/en
Application granted granted Critical
Publication of EP0910681B1 publication Critical patent/EP0910681B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
    • B05C3/125—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length the work being a web, band, strip or the like
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0035—Means for continuously moving substrate through, into or out of the bath
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0036—Crucibles
    • C23C2/00361—Crucibles characterised by structures including means for immersing or extracting the substrate through confining wall area
    • C23C2/00362—Details related to seals, e.g. magnetic means
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/006—Pattern or selective deposits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work

Definitions

  • the invention relates to a device for coating strip-like material, in which a metal strip is passed through a container holding the molten coating material, which has a channel surrounding the strip-shaped material below the molten pool level, in which currents are induced by inductors in the coating material that induce an electromagnetic Strength to
  • the container receiving the melt-shaped coating material there is provided with a bottom through opening for the band to be coated, which is sealed by an electromagnetic pump.
  • This pump generates an electromagnetic force that is equal to or greater than the metallostatic pressure in the opening of the passage. This prevents the molten coating material from leaking through the passage.
  • the passage channel is exposed to high thermal requirements and wears accordingly. For this reason, it is necessary to replace the channel.
  • the replacement of a one-part channel presupposes that there is no more tape in the channel and that after changing the worn components, it is necessary to re-thread the tape through the channel.
  • Threading the belt is very time-consuming and difficult and clearly disturbs the productivity of the system due to long downtimes.
  • the channel is easily detachably attached to the bottom of the container and consists of several parts that can be separated and sealed against each other in the tape running direction and that are used to replace the channel with the tape inside after loosening the separating connection individually at right angles to the tape running direction Band can be moved away.
  • the essence of the present invention is to form the channel from parts which can be separated from one another and which can be moved away from the band in order to replace the channel without the band itself having to be separated or unthreaded.
  • the channel or the parts of the channel are easily detachably fastened to the bottom of the container holding the coating material and can be moved away in the shortest possible time after the container has been emptied.
  • new channel parts can be transported in and assembled to form a new channel in such a way that a closed channel encompassing the band results.
  • the separable parts are sealed against each other by suitable sealants and close the channel in a liquid-tight manner in the working state.
  • the channel consists of an electrically insulating material with good surface wettability, the channel is preferably formed from ceramic material.
  • the ceramic material is designed so that the surface property and structure
  • the inductors which enclose the channel on both sides, are particularly effective when using the electrically insulated ceramic material.
  • the inductors can be attached to the inductors and can be moved or displaced together with them.
  • the inductors for example guided on rollers, can be moved transversely to the belt and take the separate channel parts with them when moving.
  • the channel parts can be movable or displaceable in the system independently of the inductors and, for example, to first move the inductors for changing the channel and to move the channel parts in a second step.
  • the channel is sealed in such a way that it can be closed gas-tight and can be supplied with protective gas.
  • the channel For quick detachability of the channel, it is held on the tank bottom by means of wedges or eccentrics and can be brought into its removal position for a short time after loosening the wedges or adjusting the eccentrics.
  • the tape remains in its central position while the channel is removed by separating it into channel parts.
  • a roller arrangement for guiding and centering the band is provided below the channel.
  • the present invention enables the channel parts to be changed quickly without first removing the belt and considerably reduces the downtimes of the system. This allows the productivity of the system to be increased, and at the same time the quality of the coated metal strip is increased, because the unevenness of the coating caused by the change of the channel is kept very low by the easier rapid change of the worn channel parts.
  • Figure 1 shows a schematic representation of an inventive device for
  • FIG. 2 shows the device according to FIG. 1 in a representation rotated by 90 °
  • Figure 4 shows an example of the attachment of the channel to the bottom of the container.
  • 1 denotes the container which holds the molten coating material 2 in it.
  • the band denoted by 3 is passed through the container 1 in the direction of the arrow from bottom to top and thereby coated with the coating material 2.
  • At the bottom 4 of the container 1 there is a fastening device 5 for the parts 6a and 6b of the channel denoted by 7, through which the band 3 is guided in a centered manner.
  • the rollers 8a, 8b create a stable guide for the band 3 in the entry region of the channel 7, by means of which the band 3 is held in a center-centered position;
  • the inductors are on both sides of channel 7
  • FIG. 2 the same parts are identified identically, the channel having a rectangular cross-section can be seen, the cross-sectional opening depending on the thickness and width of the strips 3 to be coated.
  • the channel shown in cross section is composed of at least two parts 6a, 6b (FIG. 3a) which are connected to one another by a suitable heat-resistant seal 12 to form a closed channel 7.
  • the channel consists of four parts, namely the broad sides 6a, 6b and the end faces 6c, 6d sealingly closing the broad sides, which in turn are sealed off from the broad sides at 12.
  • the channel consists of two separable parts, each of which is L-shaped, one leg of the L-shaped cross section forming the end wall of the channel relative to the other leg, and both legs at 12 being sealed off from one another.
  • FIG. 3a the channel shown in cross section is composed of at least two parts 6a, 6b (FIG. 3a) which are connected to one another by a suitable heat-resistant seal 12 to form a closed channel 7.
  • the channel consists of four parts, namely the broad sides 6a, 6b and the end faces 6c, 6d sealingly closing the broad sides, which in turn are sealed off from the broad sides at 12.
  • a two-part channel 7 is likewise provided, one of the end walls remaining fixed, that is to say stationary, on a system part (not specified in more detail), while the other channel part 6a is practically put over the band and is sealingly connected to the fixed channel part at 12 .
  • FIG. 4 schematically indicates how, for example, the channel 7 is fixed on the bottom 4 of the container 1, specifically by means of wedges 13 which mesh with one another can be brought into operative connection with each other by moving the channel 7 in arrow direction 14. In this way, the channel 7 can be connected very quickly to the bottom 4 of the container 1 and detached just as quickly
  • An advantage of the present invention is that the channel 7, which is composed of two or more parts, does not require any separation of the metal strip present in the system when the channel is replaced, and accordingly the availability of the system is increased by forming the channel from two or more parts which can be separated in the running direction of the strip, the duct can be dismantled when the strip is then in place, whereby the conversion can be carried out in a very short time using quick connection elements.
  • Suitable sealing elements or materials are inserted between the duct parts, which advantageously prevent the liquid metal from flowing out during operation Channel 7 can be heated via the inductors if, after the channel has been modified, it must be prepared for a new working cycle

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • General Induction Heating (AREA)

Abstract

This invention concerns a device for coating band-shaped material in which a metal band is guided through a container of the molten coating material which has a channel surrounding the band-shaped material beneath the surface level of the melting bath in which flux is induced through the coating material using inductors which cause an electromagnetic force for retention of the coating material. The channel (7) is mounted so as to be easily detachable at the bottom of the container (1) and consists of several parts (6a-6d) which are sealed off against each other and can be separated in the direction of the band travel and can each be moved transversal to the travel of the band after separation of the detachable connection for changing the channel (7) when it contains a band (3).

Description

Vorrichtung zum Schmelztauchbeschichten von MetallbandDevice for hot dip coating of metal strip
Beschreibungdescription
Die Erfindung betrifft eine Vorrichtung zum Beschichten von bandförmigem Gut, bei der ein Metallband durch einen das geschmolzene Überzugsmaterial aufnehmenden Behälter hindurchgeführt wird, der unterhalb des Schmelzbadspiegels einen das bandförmige Gut umschließenden Kanal aufweist, in dem durch Induktoren im Überzugsmaterial Ströme induziert werden, die eine elektromagnetische Kraft zumThe invention relates to a device for coating strip-like material, in which a metal strip is passed through a container holding the molten coating material, which has a channel surrounding the strip-shaped material below the molten pool level, in which currents are induced by inductors in the coating material that induce an electromagnetic Strength to
Zurückhalten des Überzugsmaterials hervorrufen.Cause retention of the covering material.
Eine gattungsgemäße Anlage ist beispielsweise in dem deutschen Patent 43 44 939 beschrieben. Der dort das schmelzförmige Überzugsmaterial aufnehmende Behälter ist mit einer bodenseitigen Durchführungsöffnung für das zu beschichtende Band versehen, die durch eine Elektromagnetpumpe abgedichtet ist. Diese Pumpe erzeugt eine elektromagnetische Kraft, die gleich groß oder größer als der metallostatische Druck in der Öffnung des Durchlaßkanals ist. Dadurch wird das schmelzflüssige Überzugsmaterial daran gehindert, durch den Durchlaßkanal auszulaufen.A generic system is described for example in German Patent 43 44 939. The container receiving the melt-shaped coating material there is provided with a bottom through opening for the band to be coated, which is sealed by an electromagnetic pump. This pump generates an electromagnetic force that is equal to or greater than the metallostatic pressure in the opening of the passage. This prevents the molten coating material from leaking through the passage.
Der Durchlaßkanal ist hohen thermischen Anforderungen ausgesetzt und verschleißt dementsprechend. Aus diesem Grund ist es erforderlich, den Kanal zu ersetzen. Das Auswechseln eines einteiligen Kanals setzt voraus, daß sich kein Band mehr im Kanal befindet, und daß nach dem Wechseln der verschlissenen Bauteile ein erneutes Einfädeln des Bandes durch den Kanal erforderlich wird. Das Trennen und erneuteThe passage channel is exposed to high thermal requirements and wears accordingly. For this reason, it is necessary to replace the channel. The replacement of a one-part channel presupposes that there is no more tape in the channel and that after changing the worn components, it is necessary to re-thread the tape through the channel. The disconnect and renew
Einfädeln des Bandes ist sehr zeitaufwendig und schwierig und stört die Produktivität der Anlage durch lange Stillstandszeiten deutlich.Threading the belt is very time-consuming and difficult and clearly disturbs the productivity of the system due to long downtimes.
Ausgehend von dem beschriebenen Problem und Nachteil beim Stand der Technik ist es Aufgabe der vorliegenden Erfindung, eine gattungsgemäße Vorrichtung zum Beschichten von bandförmigem Gut so zu verbessern, daß bei minimierten Stillstandszeiten der Anlage ein Schnellwechsel des Kanals möglich wird, ohne daß das Band zertrennt werden muß.Based on the described problem and disadvantage in the prior art, it is an object of the present invention to provide a generic device for Coating of strip-shaped material to improve so that with minimal downtimes of the system, a quick change of the channel is possible without the strip having to be cut.
Zur Lösung der Aufgabe wird erfindungsgemäß vorgeschlagen, daß der Kanal leicht lösbar am Boden des Behälters befestigt ist und aus mehreren, in Bandlaufrichtung trennbaren und gegeneinander abgedichteten Teilen besteht, die zum Auswechseln des Kanals bei darin befindlichem Band nach Lösen der Trennverbindung einzeln quer zur Bandlaufrichtung vom Band wegbewegbar sind.To solve the problem it is proposed according to the invention that the channel is easily detachably attached to the bottom of the container and consists of several parts that can be separated and sealed against each other in the tape running direction and that are used to replace the channel with the tape inside after loosening the separating connection individually at right angles to the tape running direction Band can be moved away.
Kern der vorliegenden Erfindung ist es, den Kanal aus voneinander trennbaren Teilen auszubilden, die zum Auswechseln des Kanals vom Band wegbewegt werden können, ohne daß das Band selbst getrennt oder ausgefädelt werden muß. So ist der Kanal bzw. die Teile des Kanals sind leicht lösbar am Boden des das Überzugsmaterial aufnehmenden Behälters befestigt und können in kürzester Zeit nach dem Entleeren des Behälters wegbewegt werden. In gleicher Weise können neue Kaπalteile herantransportiert werden und zur Bildung eines neuen Kanals so zusammengefügt werden, daß sich ein geschlossener, das Band umgreifender Kanal ergibt. Die trennbaren Teile sind durch geeignete Dichtmittel gegeneinander abgedichtet und schließen im Arbeitszustand den Kanal flüssigkeitsdicht ab.The essence of the present invention is to form the channel from parts which can be separated from one another and which can be moved away from the band in order to replace the channel without the band itself having to be separated or unthreaded. The channel or the parts of the channel are easily detachably fastened to the bottom of the container holding the coating material and can be moved away in the shortest possible time after the container has been emptied. In the same way, new channel parts can be transported in and assembled to form a new channel in such a way that a closed channel encompassing the band results. The separable parts are sealed against each other by suitable sealants and close the channel in a liquid-tight manner in the working state.
In einer Weiterbildung der Erfindung ist vorgesehen, daß der Kanal aus einem elektrisch isolierenden Material mit guter Oberflächenbenetzbarkeit besteht, vorzugsweise wird der Kanal aus Keramikmaterial gebildet. Das Keramikmaterial ist hinsichtlich Oberflächeneigenschaft und Struktur derartig ausgebildet, daß dieIn a further development of the invention it is provided that the channel consists of an electrically insulating material with good surface wettability, the channel is preferably formed from ceramic material. The ceramic material is designed so that the surface property and structure
Oberfläche durch das flüssige Beschichtungsmetall benetzt wird. Die Induktoren, die den Kanal beidseitig einschließen, sind bei Verwendung des elektrisch isolierten Keramikmaterials besonders gut wirksam.Surface is wetted by the liquid coating metal. The inductors, which enclose the channel on both sides, are particularly effective when using the electrically insulated ceramic material.
Zum Auswechseln der Kanalteile können diese an den Induktoren befestigt sein und mit diesen gemeinsam verfahr- oder verschiebbar sein. Das bedeutet, daß zum Auswechseln der Kanalteile und zum öffnen des abgeschlossenen Kanals die Induktoren, beispielsweise auf Rollen geführt, quer zum Band verfahrbar sind und beim Verfahren die getrennten Kanalteile mitnehmen. Es ist auch denkbar, nach einer anderen Ausführungsform der Erfindung, die Kanalteile unabhängig von den Induktoren verfahr- oder verschiebbar in der Anlage anzuordnen und beispielsweise für den Wechsel des Kanals zunächst die Induktoren zu verfahren und in einem zweiten Arbeitsschritt die Kanalteile zu verschieben.To replace the duct parts, they can be attached to the inductors and can be moved or displaced together with them. This means that to replace the channel parts and to open the closed channel, the inductors, for example guided on rollers, can be moved transversely to the belt and take the separate channel parts with them when moving. It is also conceivable, according to another embodiment of the invention, to arrange the channel parts to be movable or displaceable in the system independently of the inductors and, for example, to first move the inductors for changing the channel and to move the channel parts in a second step.
Für das Beschichtungsverfahren ist es günstig, wenn der Kanal so abgedichtet ist, daß er gasdicht verschließbar und mit Schutzgas beaufschlagbar ist.For the coating process, it is advantageous if the channel is sealed in such a way that it can be closed gas-tight and can be supplied with protective gas.
Zur schnellen Lösbarkeit des Kanals ist dieser mittels Keilen oder Exzentern am Behälterboden gehalten und kann nach Lösen der Keile oder Verstellen der Exzenter kurzfristig in seine Ausbaulage gebracht werden. In jedem Fall verbleibt das Band in seiner Mittellage, während der Kanal durch Auftrennen in Kanalteile entfernt wird.For quick detachability of the channel, it is held on the tank bottom by means of wedges or eccentrics and can be brought into its removal position for a short time after loosening the wedges or adjusting the eccentrics. In any case, the tape remains in its central position while the channel is removed by separating it into channel parts.
Zur Führung des Bandes und zur Mittenzentrierung ist nach einem weiteren Merkmal der Erfindung vorgesehen, daß unterhalb des Kanals eine Rollenanordnung zur Führung und Zentrierung des Bandes vorgesehen ist.According to a further feature of the invention, for guiding the band and for centering, a roller arrangement for guiding and centering the band is provided below the channel.
Die vorliegende Erfindung ermöglicht ein Schnellwechseln der Kanalteile ohne vorheriges Entfernen des Bandes und reduziert die Stillstandszeiten der Anlage erheblich. Dadurch läßt sich die Produktivität der Anlage steigern, wobei gleichzeitig die Qualität des beschichteten Metallbandes erhöht wird, weil durch das erleichterte Schnellwechseln der verschlissenen Kanalteile die durch den Kanalwechsel hervorgerufenen Beschichtungsungleichmäßigkeiten sehr gering gehalten werden.The present invention enables the channel parts to be changed quickly without first removing the belt and considerably reduces the downtimes of the system. This allows the productivity of the system to be increased, and at the same time the quality of the coated metal strip is increased, because the unevenness of the coating caused by the change of the channel is kept very low by the easier rapid change of the worn channel parts.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben. Es zeigt:An embodiment of the invention is shown in the drawing and is described below. It shows:
Figur 1 in schematischer Darstellung eine erfindungsgemäße Vorrichtung zumFigure 1 shows a schematic representation of an inventive device for
Schmelztauchbeschichten von Bändern im Querschnitt,Hot-dip coating of strips in cross-section,
Figur 2 die Vorrichtung nach Figur 1 in um 90° gedrehter Darstellung,FIG. 2 shows the device according to FIG. 1 in a representation rotated by 90 °,
Figur 3 a-d Querschnitte durch verschiedene geteilte Kanäle, undFigure 3 a-d cross sections through different divided channels, and
Figur 4 ein Beispiel der Befestigung des Kanals am Behälterboden. In Figur 1 ist mit 1 der Behälter bezeichnet, der das geschmolzene Überzugsmaterial 2 in sich aufnimmt. Das mit 3 bezeichnete Band wird in Pfeilrichtung von unten nach oben durch den Behälter 1 hindurchgeführt und dabei mit dem Überzugsmaterial 2 beschichtet. Am Boden 4 des Behälters 1 ist eine Befestigungsvorrichtung 5 für die Teile 6a und 6b des mit 7 bezeichneten Kanals vorgesehen, durch den das Band 3 zentriert hindurchgeführt wird. Durch die Rollen 8a, 8b wird im Eintrittsbereich des Kanals 7 eine stabile Führung für das Band 3 geschaffen, durch die das Band 3 in einer mittenzentrierten Lage gehalten w;rd. Beidseitig des Kanals 7 sind die InduktorenFigure 4 shows an example of the attachment of the channel to the bottom of the container. In Figure 1, 1 denotes the container which holds the molten coating material 2 in it. The band denoted by 3 is passed through the container 1 in the direction of the arrow from bottom to top and thereby coated with the coating material 2. At the bottom 4 of the container 1 there is a fastening device 5 for the parts 6a and 6b of the channel denoted by 7, through which the band 3 is guided in a centered manner. The rollers 8a, 8b create a stable guide for the band 3 in the entry region of the channel 7, by means of which the band 3 is held in a center-centered position; The inductors are on both sides of channel 7
9a, 9b angeordnet, die - wie in der strichpunktierten Darstellung erkennbar - auf Rollen 10 , die ihrerseits auf Führungsbahnen 11 abrollen, nach beiden Seiten vom Kanal 7 wegbewegbar sind.9a, 9b arranged, which - as can be seen in the dash-dotted representation - on rollers 10, which in turn roll on guideways 11, can be moved away from the channel 7 on both sides.
In Figur 2 sind gleiche Teile gleich bezeichnet, erkennbar ist der Kanal von rechteckigem Querschnitt, wobei die Querschnittsöffnung von der Dicke und Breite der zu beschichtenden Bänder 3 abhängt.In FIG. 2, the same parts are identified identically, the channel having a rectangular cross-section can be seen, the cross-sectional opening depending on the thickness and width of the strips 3 to be coated.
Wie in den Figuren 3a-d zu erkennen ist, ist der im Querschnitt dargestellte Kanal aus mindestens zwei Teilen 6a, 6b (Figur 3a) zusammengesetzt, die durch geeignete hitzebeständige Dichtungen 12 miteinander zu einem geschlossenen Kanal 7 verbunden sind. In Figur 3b besteht der Kanal aus vier Teilen, nämlich den Breitseiten 6a, 6b und den die Breitseiten abdichtend verschließenden Stirnseiten 6c, 6d, die wiederum gegenüber den Breitseiten bei 12 abgedichtet sind. Im Ausführungsbeispiel der Figur 3c besteht der Kanal aus zwei trennbaren Teilen, die jeweils L-förmig ausgebildet sind, wobei der eine Schenkel des L-förmigen Querschnittes gegenüber dem anderen Schenkel die Stirnwand des Kanals bildet und beide Schenkel bei 12 gegeneinander abgedichtet sind. Im Ausführungsbeispiel der Figur 3d ist ebenfalls ein zweigeteilter Kanal 7 vorgesehen, wobei eine der Stirnwände fest, also stationär an einem nicht näher bezeichneten Anlagenteil verbleibt, während der andere Kanalteil 6a praktisch über das Band gestülpt wird und mit dem festen Kanalteil bei 12 abdichtend verbunden wird.As can be seen in FIGS. 3a-d, the channel shown in cross section is composed of at least two parts 6a, 6b (FIG. 3a) which are connected to one another by a suitable heat-resistant seal 12 to form a closed channel 7. In FIG. 3b, the channel consists of four parts, namely the broad sides 6a, 6b and the end faces 6c, 6d sealingly closing the broad sides, which in turn are sealed off from the broad sides at 12. In the exemplary embodiment in FIG. 3c, the channel consists of two separable parts, each of which is L-shaped, one leg of the L-shaped cross section forming the end wall of the channel relative to the other leg, and both legs at 12 being sealed off from one another. In the exemplary embodiment in FIG. 3d, a two-part channel 7 is likewise provided, one of the end walls remaining fixed, that is to say stationary, on a system part (not specified in more detail), while the other channel part 6a is practically put over the band and is sealingly connected to the fixed channel part at 12 .
In Figur 4 ist schematisch angedeutet, wie beispielsweise die Festlegung des Kanals 7 am Boden 4 des Behälters 1 erfolgt, nämlich über miteinander kämmende Keile 13, die durch Verschieben des Kanals 7 in Pfeilπchtung 14 in Wirkverbindung miteinander gebracht werden Auf diese Weise läßt sich der Kanal 7 sehr schnell mit dem Boden 4 des Behalters 1 verbinden und ebenso schnell losenFIG. 4 schematically indicates how, for example, the channel 7 is fixed on the bottom 4 of the container 1, specifically by means of wedges 13 which mesh with one another can be brought into operative connection with each other by moving the channel 7 in arrow direction 14. In this way, the channel 7 can be connected very quickly to the bottom 4 of the container 1 and detached just as quickly
Vorteil der vorliegenden Erfindung ist es, daß der aus zwei oder mehr Teilen zusammengesetzte Kanal 7 beim Auswechseln des Kanals kein Trennen des in der Anlage befindlichen Metallbandes erforderlich macht und dementsprechend die Verfügbarkeit der Anlage erhöht wird Durch Ausbildung des Kanals aus zwei oder mehreren Teilen, die in Bandlaufrichtung trennbar sind, wird das Demontieren des Kanals bei dann befindlichem Band ermöglicht, wobei durch Schnellverbindungs- elemente der Umbau in kürzester Zeit durchgeführt werden kann Zwischen den Kanalteilen sind geeignete Dichtungselemente oder Materialien eingefugt, die ein Ausfließen des flussigen Metalles wahrend des Betriebes verhindern Vorteilhafterweise läßt sich der Kanal 7 über die Induktoren erwarmen, wenn nach dem Umbau des Kanals dieser für einen neuen Arbeitszyklus vorbereitet werden muß An advantage of the present invention is that the channel 7, which is composed of two or more parts, does not require any separation of the metal strip present in the system when the channel is replaced, and accordingly the availability of the system is increased by forming the channel from two or more parts which can be separated in the running direction of the strip, the duct can be dismantled when the strip is then in place, whereby the conversion can be carried out in a very short time using quick connection elements. Suitable sealing elements or materials are inserted between the duct parts, which advantageously prevent the liquid metal from flowing out during operation Channel 7 can be heated via the inductors if, after the channel has been modified, it must be prepared for a new working cycle

Claims

Patentansprüche claims
1. Vorrichtung zum Beschichten von bandförmigem Gut, bei der ein Metallband durch einen das geschmolzene Überzugsmaterial aufnehmenden Behälter hindurchgeführt wird, der unterhalb des Schmelzbadspiegels einen das bandförmige Gut umschließenden Kanal aufweist, in dem durch Induktoren im Überzugsmaterial Ströme induziert werden, die eine elektromagnetische Kraft zum Zurückhalten des Überzugsmaterials hervorrufen, dadurch gekennzeichnet daß der Kanal (7) leicht lösbar am Boden des Behälters (1) befestigt ist und aus mehreren in Bandlaufrichtung trennbaren und gegeneinander abgedichteten Teilen (6a bis 6d) besteht, die zum Auswechseln des Kanals (7) bei darin befindlichem Band (3) nach Lösen der Trennverbindung einzeln quer zur Bandlaufrichtung vom Band (3) wegbewegbar sind.1. Apparatus for coating strip-like material, in which a metal strip is passed through a container which holds the molten coating material and has a channel surrounding the strip-shaped material below the melt pool level, in which currents are induced by inductors in the coating material which induce an electromagnetic force Cause retention of the coating material, characterized in that the channel (7) is easily detachably fastened to the bottom of the container (1) and consists of several parts (6a to 6d) which can be separated and sealed against one another in the strip running direction and which help to replace the channel (7) belt (3) located therein can be moved away from the belt (3) individually after releasing the separating connection transversely to the direction of belt travel.
2. Vorrichtung zum Beschichten von bandförmigem Gut nach Anspruch 1 , dadurch gekennzeichnet, daß der Kanal (7)aus einem elektrisch isolierendem Material mit guter Oberflächenbenetzbarkeit besteht.2. Device for coating strip-like material according to claim 1, characterized in that the channel (7) consists of an electrically insulating material with good surface wettability.
3. Vorrichtung zum Beschichten von bandförmigem Gut nach Anspruch 1 und 2, dadurch gekennzeichnet, daß der Kanal (7) aus Keramikmaterial gebildet ist.3. Device for coating strip-like material according to claim 1 and 2, characterized in that the channel (7) is formed from ceramic material.
4. Vorrichtung zum Beschichten von bandförmigem Gut nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Kanalteile (6a bis 6d) an den Induktoren (9a, 9b) befestigt und mit diesen gemeinsam verfahr- oder verschiebbar sind.4. A device for coating strip-like material according to claim 1 to 3, characterized in that the channel parts (6a to 6d) are attached to the inductors (9a, 9b) and can be moved or displaced together with them.
5. Vorrichtung zum Beschichten von bandförmigem Gut nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Kanalteile (6a bis 6d) unabhängig von den Induktoren (9a, 9b) verfahr- oder verschiebbar sind. 5. A device for coating strip-like material according to claim 1 to 3, characterized in that the channel parts (6a to 6d) are movable or displaceable independently of the inductors (9a, 9b).
6. Vorrichtung zum Beschichten von bandförmigem Gut nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß der Kanal (7) gasdicht verschließbar und mit Schutzgas beaufschlagbar ist.6. Device for coating strip-like material according to claim 1 to 5, characterized in that the channel (7) can be closed gas-tight and can be acted upon with protective gas.
7. Vorrichtung zum Beschichten von bandförmigem Gut nach Anspruch 1 , dadurch gekennzeichnet, daß der Kanal (7) mittels Keilen (13) oder Exzentern am Behälterboden (4) gehalten wird.7. Device for coating strip-like material according to claim 1, characterized in that the channel (7) is held by means of wedges (13) or eccentrics on the container bottom (4).
8. Vorrichtung zum Beschichten von bandförmigem Gut nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß unterhalb des Kanals (7) eine Rollenanordnung (8a, 8b) zur Führung und Mittenzentrierung des Bandes (3) vorgesehen ist. 8. A device for coating strip-like material according to claim 1 to 7, characterized in that a roller arrangement (8a, 8b) for guiding and centering the strip (3) is provided below the channel (7).
EP97931704A 1996-07-05 1997-07-01 Device for hot-dip coating metal band Expired - Lifetime EP0910681B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19628512 1996-07-05
DE19628512A DE19628512C1 (en) 1996-07-05 1996-07-05 Metal strip hot dip coating unit
PCT/DE1997/001412 WO1998001595A1 (en) 1996-07-05 1997-07-01 Device for hot-dip coating metal band

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EP0910681A1 true EP0910681A1 (en) 1999-04-28
EP0910681B1 EP0910681B1 (en) 2000-05-03

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EP (1) EP0910681B1 (en)
JP (1) JP3774235B2 (en)
KR (1) KR100498671B1 (en)
AT (1) ATE192509T1 (en)
AU (1) AU3538197A (en)
CA (1) CA2259409C (en)
DE (2) DE19628512C1 (en)
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JP4843975B2 (en) * 2005-03-25 2011-12-21 Ｊｆｅスチール株式会社 Plating bath equipment
DE102005029576A1 (en) * 2005-06-25 2007-01-04 Sms Demag Ag Device for the hot dip coating of a metal strand
DE102005030766A1 (en) * 2005-07-01 2007-01-04 Sms Demag Ag Device for the hot dip coating of a metal strand

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DE1157743B (en) * 1955-08-24 1963-11-21 Gen Electric Process for the continuous production of semi-finished products
US3090352A (en) * 1960-09-26 1963-05-21 Armco Steel Corp Molten metal trap for coating apparatus
DE8616987U1 (en) * 1986-06-26 1987-10-22 Chamotte- und Tonwerk Kurt Hagenburger, 6718 Grünstadt Filling tube for casting metallic workpieces
DE4208578A1 (en) * 1992-03-13 1993-09-16 Mannesmann Ag METHOD FOR COATING THE SURFACE OF STRAND-SHAPED GOODS
DE4320723A1 (en) * 1993-06-23 1995-01-05 Didier Werke Ag Immersion spout
CA2131059C (en) * 1993-09-08 2001-10-30 William A. Carter Hot dip coating method and apparatus
DE4344939C1 (en) * 1993-12-23 1995-02-09 Mannesmann Ag Method for the control, suitable for the process, of an installation for coating strip-shaped material
IN191638B (en) * 1994-07-28 2003-12-06 Bhp Steel Jla Pty Ltd
WO1996038599A1 (en) * 1995-05-29 1996-12-05 M3D, Societe Anonyme Method and apparatus for coating a metal strip with a metal or alloy with a lower melting or liquidus point than the strip material
CA2225537C (en) * 1996-12-27 2001-05-15 Mitsubishi Heavy Industries, Ltd. Hot dip coating apparatus and method

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Title
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DE59701594D1 (en) 2000-06-08
JP3774235B2 (en) 2006-05-10
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JP2000514141A (en) 2000-10-24
KR100498671B1 (en) 2005-07-01
ATE192509T1 (en) 2000-05-15
ES2145615T3 (en) 2000-07-01
US6254680B1 (en) 2001-07-03
EP0910681B1 (en) 2000-05-03
DE19628512C1 (en) 1997-09-04
AU3538197A (en) 1998-02-02
WO1998001595A1 (en) 1998-01-15
CA2259409A1 (en) 1998-01-15
CA2259409C (en) 2006-09-05

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