EP1284164A1 - Process and apparatus for coating with a melted product - Google Patents

Process and apparatus for coating with a melted product Download PDF

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Publication number
EP1284164A1
EP1284164A1 EP02017471A EP02017471A EP1284164A1 EP 1284164 A1 EP1284164 A1 EP 1284164A1 EP 02017471 A EP02017471 A EP 02017471A EP 02017471 A EP02017471 A EP 02017471A EP 1284164 A1 EP1284164 A1 EP 1284164A1
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EP
European Patent Office
Prior art keywords
roller
coating
substrate
web
sheet
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Granted
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EP02017471A
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German (de)
French (fr)
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EP1284164B1 (en
Inventor
Peter Dipl.-Ing. Knupfer
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Inductotherm Coating Equipment SA
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Inductotherm Coating Equipment SA
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    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0856—Reverse coating rollers
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/10—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the liquid or other fluent material being supplied from inside the roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • 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 method for applying a coating on a web-like material, the material of the coating being in the molten state by means of at least one rotating roller is applied, solidified by cooling and with connects the substrate, being at least on a portion of the shell of the roller Film of the material of the coating is generated and the substrate at such a distance is guided relative to the roller that the material of the Coating flows continuously from the roller onto the surface of the substrate as well as a Device for applying a coating to a web-like material, the Material of the coating in the molten state by means of at least one rotatable Roller can be applied, after which it solidifies by cooling and converges with the web Connects well, with a film of the material of the Coating can be produced and the web-like material at such a distance from the roller It is feasible that the material of the coating is continuously removed from a contact area the jacket of the roller flows onto the web-like material.
  • Such immersion processes are characterized by a ratio to the thickness of the desired Coating very high amount of the material used for coating, because the immersed components or tapes at least once completely below the surface the melt must reach.
  • Large amounts resulted from the large amounts used Dimensions of the immersion baths, high energy and insulation requirements and - especially with the Use of high-quality materials for coating - a high capital commitment. moreover undesirable deposits form in immersion baths with metallic melts, which Can negatively affect the quality of the coating.
  • at Coating of sheets with immersion processes always always coated both sides. A coating on a single side or different coatings both sides are not possible.
  • the object of the invention is a further method and an apparatus for propose molten coatings, by means of which the size of the generic device can be significantly reduced.
  • this object is achieved according to the invention solved in that the liquid material of the coating from an inner cavity a roller is promoted by breakthroughs on the shell of the roller.
  • the Generic device has a roller of a device according to the invention inner cavity that is covered with pressurized liquid material of the coating can be acted upon and is provided with openings for the liquid material to exit the cavity on the jacket.
  • the invention leads to surprisingly constructive simple solutions and compact designs. Different coatings too both sides are possible.
  • the amount of coating material remaining in the system can advantageously be albeit with increased manufacturing effort - can be reduced if the breakthroughs the jacket of the roller individually over essentially radially extending channels with a pressure line running axially inside the roller are connected. By a Reducing the diameter of this pressure line and the channels will make the empty volume of the Roller and thus the amount of material used significantly reduced.
  • the invention then leads to a particularly easy-to-use method if the Roll is mounted stationary and the web-like material in its longitudinal direction relative to the stationary roller is moved past this. Is the web-shaped good in addition Contact area moved essentially vertically upwards, so the supports Acceleration of gravity the formation of a film of the material of the coating on the Top of the roller.
  • a roller movable in a direction that a component perpendicular to the surface of the possesses web-like estates By adjusting the distance between the roller and Substrate can have different flow properties of the material of the coating be taken into account.
  • the coating can be removed by removing the roller interrupted by the substrate very easily and at a later point by re-delivery to be resumed. If the roller is movably supported in its axial direction, then can apply the coating to the substrate without any significant effort can be varied.
  • coatings can be coated with, for example, the half the width of the tape.
  • the invention is used particularly advantageously in the coating of metallic Tapes, when coating with metals, or when the melting point of the coating is less than the melting point of the substrate.
  • a roller of the device according to the invention can be heated be designed around a premature solidification of the material of the coating submissions.
  • the roll mantle may cover part of its circumference before entering be actively heated in the contact area from the outside.
  • the shape described above of radial channels in the roller also enables a reduction in the outer ones Dimensions of the generic device by the arrangement of additional Heating elements inside the roller.
  • the substrate can also be removed before entering the Contact area from the outside, actively heated and, if necessary, exposed to protective gas become.
  • the flow of material from the jacket of the roller to the surface of the substrate is then special easy to set if the directions of movement of those to be coated are in the contact area Surface and the shell of the roller are opposite to each other.
  • the openings in the grooves leading to the surface of the roller Sheath are arranged that are helical with a constant slope or perpendicular to Run longitudinally and equidistantly around the longitudinal axis of the roller. So it becomes even Distribution of the material of the coating on the surface of the roller is achieved.
  • a device 1 according to FIG. 1 for coating a web-shaped substrate on both sides 2 in the form of a steel strip with a metallic material, for example one Zinc alloy, comprises two oppositely arranged devices 3a and 3b for the one-sided coating, between which the substrate 2 continuously in one Direction 4 is led vertically upwards. Passes through before entering device 1 the substrate 2 is an inductive heater 5.
  • the devices 3a and 3b each comprise a roller 6, one arranged below it Collecting device 7 and a housing 8 comprising both Roller 6 in a bath 9 formed by the liquid material of the coating.
  • the grooves 11a and 11b represent alternative embodiments represents, which suitably relate to the overall roll surface.
  • the devices 3a and 3b can easily be attached different properties of the substrate 2, the metallic liquid and the desired thickness of the coating can be adjusted. By increasing the distance There may also be interruptions between substrate 2 and roller 6 in the radial direction 18 of the coating.

Abstract

Process for applying a coating to a strip-like material (2) comprises: applying the coating material in its molten state using a rotating roller (6); solidifying by cooling; and joining to a substrate. A film of material is formed on a section of the casing (13) of the roller and the substrate is guided relative to the roller so that the coating material continuously flows from the roller onto the surface of the substrate. The coating material is conveyed from an inner hollow chamber of the roller through passages on the casing of the roller. An Independent claim is also included for a device for applying a coating to a strip-like material. Preferred Features: The strip-like material is a metallic strip and the coating material is a metal. The melting point of the coating is less than the melting point of the strip-like material.

Description

Die Erfindung betrifft ein Verfahren zum Aufbringen einer Beschichtung auf ein bahnförmiges Gut, wobei das Material der Beschichtung im schmelzflüssigen Zustand mittels mindestens einer rotierenden Walze aufgebracht wird, durch Abkühlen erstarrt und sich mit dem Substrat verbindet, wobei mindestens auf einem Abschnitt des Mantels der Walze ein Film des Materials der Beschichtung erzeugt wird und das Substrat in einem solchen Abstand relativ zu der Walze geführt wird, dass in einem Kontaktbereich das Material der Beschichtung kontinuierlich von der Walze auf die Oberfläche des Substrats fließt sowie eine Vorrichtung zum Aufbringen einer Beschichtung auf ein bahnförmiges Gut, wobei das Material der Beschichtung in schmelzflüssigem Zustand mittels mindestens einer rotierbaren Walze aufbringbar ist, wonach es durch Abkühlen erstarrt und sich mit dem bahnförmigen Gut verbindet, wobei mindestens auf einem Abschnitt des Mantels ein Film des Materials der Beschichtung erzeugbar ist und das bahnförmige Gut in einem solchen Abstand zu der Walze führbar ist, dass in einem Kontaktbereich das Material der Beschichtung kontinuierlich von dem Mantel der Walze auf das bahnförmige Gut fließt.The invention relates to a method for applying a coating on a web-like material, the material of the coating being in the molten state by means of at least one rotating roller is applied, solidified by cooling and with connects the substrate, being at least on a portion of the shell of the roller Film of the material of the coating is generated and the substrate at such a distance is guided relative to the roller that the material of the Coating flows continuously from the roller onto the surface of the substrate as well as a Device for applying a coating to a web-like material, the Material of the coating in the molten state by means of at least one rotatable Roller can be applied, after which it solidifies by cooling and converges with the web Connects well, with a film of the material of the Coating can be produced and the web-like material at such a distance from the roller It is feasible that the material of the coating is continuously removed from a contact area the jacket of the roller flows onto the web-like material.

Verfahren und Vorrichtungen zur Beschichtung eines Substrats mit schmelzflüssigem Material werden eingesetzt zur Oberflächenvergütung, zum Schutz gegen Umwelteinflüsse oder allgemein um Eigenschaften zweier Materialien - des Substrats und der Beschichtung - zu kombinieren. Die Beschichtung mit metallischen oder anorganischen Schmelzen stellt im Gegensatz zum Aufbringen von Lacken oder Kunststoffbeschichtungen völlig andere Anforderungen an die Verfahrenstechnik wie auch an die verwendeten Materialien. Anwendungsbeispiele sind das Verzinken oder Verzinnen von Stahlblechen, aber auch das Beschichten von Fensterglas mit Solarsilizium.Method and devices for coating a substrate with a molten liquid Materials are used for surface finishing, for protection against environmental influences or generally about properties of two materials - the substrate and the coating - to combine. The coating with metallic or inorganic melts in the Contrary to the application of lacquers or plastic coatings completely different Requirements for process engineering as well as for the materials used. Application examples are the galvanizing or tinning of steel sheets, but also that Coating window glass with solar silicon.

Allgemein bekannt sind Verfahren und Vorrichtungen zum schmelzflüssigen Beschichten, bei denen bandförmige Metallbleche kontinuierlich durch ein stehendes Bad einer metallischen Schmelze geführt oder Formteile aus Stahlblechen, zum Beispiel Karosserieteile einzeln in ein solches Bad getaucht werden. Die beim Herausführen eines Bandes oder beim Herausnehmen eines Formteiles aus dem Bad anhaftende Schmelze bildet nach Abkühlung und Erstarrung die Beschichtung. Methods and devices for molten coating are generally known which band-shaped metal sheets continuously through a standing bath of a metallic Melt guided or molded parts made of sheet steel, for example body parts individually in such a bath can be dipped. The one when leading out a tape or when Removing a molded part from the bath adheres to melt forms after cooling and solidify the coating.

Derartige Tauchverfahren zeichnen sich durch eine im Verhältnis zur Dicke der gewünschten Beschichtung sehr hohe Einsatzmenge des zur Beschichtung verwendeten Materials aus, da die eingetauchten Bauteile oder Bänder mindestens einmal vollständig unter die Oberfläche der Schmelze gelangen müssen. Aus den großen Einsatzmengen resultierten große Abmessungen der Tauchbäder, hohe Energie- und Isolationsaufwände und - gerade bei der Verwendung hochwertiger Materialien zur Beschichtung - eine hohe Kapitalbindung. Zudem bilden sich in Tauchbädern mit metallischen Schmelzen unerwünschte Ablagerungen, die die Qualität der Beschichtung negativ beeinflussen können. Darüber hinaus werden bei der Beschichtung von Blechen mit Tauchverfahren grundsätzlich immer beide Seiten beschichtet. Eine Beschichtung einer einzelnen Seite oder auch unterschiedliche Beschichtungen auf beiden Seiten sind nicht möglich.Such immersion processes are characterized by a ratio to the thickness of the desired Coating very high amount of the material used for coating, because the immersed components or tapes at least once completely below the surface the melt must reach. Large amounts resulted from the large amounts used Dimensions of the immersion baths, high energy and insulation requirements and - especially with the Use of high-quality materials for coating - a high capital commitment. moreover undesirable deposits form in immersion baths with metallic melts, which Can negatively affect the quality of the coating. In addition, at Coating of sheets with immersion processes always always coated both sides. A coating on a single side or different coatings both sides are not possible.

Nach dem in der deutschen Patentschrift DE 44 28 741 beschriebenen Verfahren wird eine schmelzflüssige Beschichtung auf ein Substrat aufgegossen. Mittels einer Vorrichtung wird lokal begrenzt über der Aufgießstelle ein Fluss des Materials der Beschichtung erzeugt, der die Bildung unerwünschter Ablagerungen verhindert. Beim Abziehen des Substrates aus der Vorrichtung heraus haftet eine dünne Schicht des aufgebrachten Materials an dem Substrat und bildet nach Erstarrung eine Beschichtung. Dieses Verfahren ermöglicht gegenüber Tauchverfahren bereits eine deutliche Reduzierung des Einsatzmaterials. Auch die Beschichtung einer einzelnen Seite eines bandförmigen Guts oder unterschiedliche Beschichtungen beider Seiten sind so möglich.According to the method described in German patent DE 44 28 741 Molten coating poured onto a substrate. By means of a device a flow of the material of the coating, which generates local flow over the pouring point prevents the formation of undesirable deposits. When removing the substrate from the The device sticks out a thin layer of the applied material on the substrate and forms a coating after solidification. This procedure enables against Immersion process already a significant reduction in the feed material. Also the Coating a single side of a band-shaped good or different Coatings on both sides are possible.

Gattungsgemäße Verfahren und Vorrichtungen nach den Oberbegriffen der unabhängigen Ansprüche ermöglichen auf einfache Weise durch Zustell- und Rückzugsbewegungen des bahnförmigen Guts oder einer Walze darüber hinaus eine kurzfristige Unterbrechung des Beschichtungsvorgangs oder den kurzfristigen Wechsel des Beschichtungsmaterials.Generic methods and devices according to the generic terms of the independent Claims allow in a simple manner by delivery and withdrawal movements of the web-like material or a roller also a short-term interruption of the Coating process or the short-term change of the coating material.

Ein gattungsgemäßes Verfahren und eine Vorrichtung zur Aufbringung einer Beschichtung aus einer Metallschmelze beschreibt die DE 29 21 124 A1. Die Vorrichtung weist zwei Beschichtungsstationen auf, deren Beschichtungswalzen horizontal auf verschiedenen Seiten einer Durchlaufstrecke für ein Band angeordnet sind. Zur wahlweisen Beschichtung des Bandes auf einer, beiden oder keiner Seite sind die Beschichtungsstationen und/oder die Umlenkwalzen quer zur Bandoberfläche verschiebbar. Gemäß den Ausführungsbeispielen dieser Schrift wird das Material der Beschichtung mittels jeweils einer Sekundärwalze auf die Beschichtungswalzen übertragen.A generic method and a device for applying a coating DE 29 21 124 A1 describes a molten metal. The device has two Coating stations, whose coating rollers horizontally on different sides a passage for a band are arranged. For optional coating of the The coating stations and / or the belt on one, both or none Deflection rollers can be moved across the belt surface. According to the embodiments This document describes the material of the coating by means of a secondary roller Transfer coating rollers.

Aufgabe der Erfindung ist es, ein weiteres Verfahren und eine Vorrichtung zum schmelzflüssigen Beschichten vorzuschlagen, mittels derer die Baugröße der gattungsgemäßen Vorrichtung deutlich reduziert werden kann.The object of the invention is a further method and an apparatus for propose molten coatings, by means of which the size of the generic device can be significantly reduced.

Ausgehend von dem gattungsgemäßen Verfahren wird diese Aufgabe nach der Erfindung dadurch gelöst, dass das flüssige Material der Beschichtung aus einem inneren Hohlraum einer Walze durch Durchbrüche auf den Mantel der Walze gefördert wird. Ausgehend von der gattungsgemäßen Vorrichtung weist eine Walze einer erfindungsgemäßen Vorrichtung einen inneren Hohlraum auf, der mit unter Druck stehendem flüssigen Material der Beschichtung beaufschlagbar ist und ist mit Durchbrüchen für einen Austritt des flüssigen Materials aus dem Hohlraum auf den Mantel versehen. Die Erfindung führt zu konstruktiv überraschend einfachen Lösungen und kompakten Bauformen. Auch unterschiedliche Beschichtungen beider Seiten sind möglich.Starting from the generic method, this object is achieved according to the invention solved in that the liquid material of the coating from an inner cavity a roller is promoted by breakthroughs on the shell of the roller. Starting from the Generic device has a roller of a device according to the invention inner cavity that is covered with pressurized liquid material of the coating can be acted upon and is provided with openings for the liquid material to exit the cavity on the jacket. The invention leads to surprisingly constructive simple solutions and compact designs. Different coatings too both sides are possible.

Mittels der aus dem inneren Hohlraum der Walze an die Oberfläche führenden Durchbrüche, durch die das flüssige Material auf den Mantel austreten kann, können zum einen Energieverluste durch abstrahlende Wärme wirksam reduziert werden. Zum andern wird die Wärme des Materials der Beschichtung zur Aufheizung der Walze ausgenutzt.By means of the openings leading to the surface from the inner cavity of the roller, through which the liquid material can escape onto the jacket, on the one hand Energy losses through radiant heat can be effectively reduced. The other is Heat of the material of the coating used to heat the roller.

Besonders einfach können solche Durchbrüche gestaltet werden, wenn die Walze als Stahlblechzylinder ausgeführt ist. Als nachteilig erweist sich hier der große innere Durchmesser der Walze, der nahezu dem äußeren Durchmesser entspricht, da ein gleichmäßiges Austreten des flüssigen Materials der Beschichtung über dem gesamten Umfang des Mantels eine vollständige Füllung des Hohlraums erfordert.Such breakthroughs can be designed particularly easily if the roller as Sheet steel cylinder is executed. The big inner one proves to be disadvantageous here Diameter of the roller, which almost corresponds to the outer diameter, since a uniform leakage of the liquid material of the coating over the entire The circumference of the jacket requires a complete filling of the cavity.

Die im System verbleibende Einsatzmenge des Materials der Beschichtung kann vorteilhaft - wenn auch mit erhöhtem Fertigungsaufwand - reduziert werden, wenn die Durchbrüche auf dem Mantel der Walze einzeln über im Wesentlichen radial verlaufende Kanäle mit einer axial im Innern der Walze verlaufenden Druckleitung verbunden sind. Durch eine Reduzierung der Durchmesser dieser Druckleitung und der Kanäle wird das Leervolumen der Walze und damit die Einsatzmenge des Materials signifikant reduziert. The amount of coating material remaining in the system can advantageously be albeit with increased manufacturing effort - can be reduced if the breakthroughs the jacket of the roller individually over essentially radially extending channels with a pressure line running axially inside the roller are connected. By a Reducing the diameter of this pressure line and the channels will make the empty volume of the Roller and thus the amount of material used significantly reduced.

Die Erfindung führt dann zu einem besonders einfach handhabbaren Verfahren, wenn die Walze ortsfest montiert ist und das bahnförmige Gut in seiner Längsrichtung relativ zu der ortsfesten Walze an dieser vorbei bewegt wird. Wird das bahnförmige Gut darüber hinaus im Kontaktbereich im Wesentlichen vertikal aufwärts bewegt, so unterstützt die Erdbeschleunigung die Ausbildung eines Films des Materials der Beschichtung auf der Oberseite der Walze.The invention then leads to a particularly easy-to-use method if the Roll is mounted stationary and the web-like material in its longitudinal direction relative to the stationary roller is moved past this. Is the web-shaped good in addition Contact area moved essentially vertically upwards, so the supports Acceleration of gravity the formation of a film of the material of the coating on the Top of the roller.

In einer besonders vorteilhaften Ausführungsform einer erfindungsgemäßen Vorrichtung ist eine Walze in eine Richtung bewegbar, die eine Komponente senkrecht zu der Oberfläche des bahnförmigen Guts besitzt. Durch die Einstellung des Abstandes zwischen Walze und Substrat können unterschiedliche Fließeigenschaften des Materials der Beschichtung berücksichtigt werden. Darüber hinaus kann die Beschichtung durch Entfernen der Walze vom Substrat sehr einfach unterbrochen und an einer späteren Stelle durch erneutes Zustellen wieder aufgenommen werden. Wird die Walze in ihrer Achsrichtung beweglich gelagert, so kann die Aufbringstelle der Beschichtung auf das Substrat ohne nennenswerten Aufwand variiert werden. Bei einem Band lassen sich somit Beschichtungen mit beispielsweise der halben Breite des Bandes herstellen.In a particularly advantageous embodiment of a device according to the invention a roller movable in a direction that a component perpendicular to the surface of the possesses web-like estates. By adjusting the distance between the roller and Substrate can have different flow properties of the material of the coating be taken into account. In addition, the coating can be removed by removing the roller interrupted by the substrate very easily and at a later point by re-delivery to be resumed. If the roller is movably supported in its axial direction, then can apply the coating to the substrate without any significant effort can be varied. In the case of a belt, coatings can be coated with, for example, the half the width of the tape.

Die Erfindung wird besonders vorteilhaft eingesetzt bei der Beschichtung metallischer Bänder, bei der Beschichtung mit Metallen, oder wenn der Schmelzpunkt der Beschichtung kleiner ist als der Schmelzpunkt des Substrats.The invention is used particularly advantageously in the coating of metallic Tapes, when coating with metals, or when the melting point of the coating is less than the melting point of the substrate.

In einer Ausführungsform kann eine Walze der erfindungsgemäßen Vorrichtung beheizbar gestaltet werden um einem vorzeitigen Erstarren des Materials der Beschichtung vorzubeugen. Der Mantel der Walze kann über einen Teil seines Umfangs vor dem Eintreten in den Kontaktbereich von außen aktiv erhitzt werden. Die oben beschriebene Ausformung von radialen Kanälen in der Walze ermöglicht auch hier eine Reduzierung der äußeren Abmessungen der gattungsgemäßen Vorrichtung durch die Anordnung zusätzlicher Heizelemente innerhalb der Walze. Auch das Substrat kann vor dem Eintreten in den Kontaktbereich von außen, aktiv erhitzt und erforderlichenfalls mit Schutzgas beaufschlagt werden. In one embodiment, a roller of the device according to the invention can be heated be designed around a premature solidification of the material of the coating submissions. The roll mantle may cover part of its circumference before entering be actively heated in the contact area from the outside. The shape described above of radial channels in the roller also enables a reduction in the outer ones Dimensions of the generic device by the arrangement of additional Heating elements inside the roller. The substrate can also be removed before entering the Contact area from the outside, actively heated and, if necessary, exposed to protective gas become.

Der Materialstrom vom Mantel der Walze auf die Oberfläche des Substrats ist dann besonders gut einzustellen, wenn im Kontaktbereich die Bewegungsrichtungen der zu beschichtenden Oberfläche und des Mantels der Walze einander entgegengesetzt sind.The flow of material from the jacket of the roller to the surface of the substrate is then special easy to set if the directions of movement of those to be coated are in the contact area Surface and the shell of the roller are opposite to each other.

Weiterhin ist vorgesehen, in Schwerkraftrichtung unterhalb der Walze eine Auffangeinrichtung anzuordnen, der das auf der Walze verbliebene Material der Beschichtung auffängt und über eine Aufbereitung die Rückführung in einen Kreislauf ermöglicht. Durch die Kombination einer Walze mit einer Auffangeinrichtung und die Kapselung innerhalb eines gemeinsamen Gehäuses können Verunreinigungen des eingesetzten Materials der Beschichtung wie auch Energieverluste durch abstrahlende Wärme deutlich reduziert werden. Bei der Beschichtung eines bahnförmigen Gutes kann die Führung des bahnförmigen Guts durch zwei schlitzförmige Öffnungen leicht in ein solches Gehäuse integriert werden, wodurch störende Einflüsse wiederum leichter kontrollierbar werden.Furthermore, there is a gravity direction below the roller Arrange the device of the coating material remaining on the roller collects and enables recycling into a cycle. By the combination of a roller with a collecting device and the encapsulation within a common housing can contaminate the material used Coating as well as energy losses through radiant heat can be significantly reduced. When coating a web-like good, the guidance of the web-like good can can be easily integrated into such a housing through two slot-shaped openings, which in turn makes disruptive influences easier to control.

Vorteilhaft ist es, wenn die an die Oberfläche der Walze führenden Durchbrüche in Nuten im Mantel angeordnet sind, die wendelförmig mit konstanter Steigung oder senkrecht zur Längsachse der Walze umlaufend und äquidistant verlaufen. So wird eine gleichmäßige Verteilung des Materials der Beschichtung auf der Oberfläche der Walze erreicht.It is advantageous if the openings in the grooves leading to the surface of the roller Sheath are arranged that are helical with a constant slope or perpendicular to Run longitudinally and equidistantly around the longitudinal axis of the roller. So it becomes even Distribution of the material of the coating on the surface of the roller is achieved.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels, das in einer schematischen Skizze und zwei Detailansichten dargestellt ist, erläutert. Es zeigt

Fig. 1
einen axialen Schnitt einer erfindungsgemäßen Vorrichtung mit zwei gegenläufigen Walzen zur beidseitigen Beschichtung eines bandförmigen Substrats,
Fig. 2
eine Walze mit umlaufenden Nuten, einer zugeordneten Versorgungseinrichtung und einem Auffangbehälter in einer Ansicht auf die Längsachse der Walze und
Fig. 3
eine perspektivische Ansicht einer Walze mit dem zugeordneten Auffangbehälter.
The invention is explained below on the basis of an exemplary embodiment which is illustrated in a schematic sketch and two detailed views. It shows
Fig. 1
3 shows an axial section of a device according to the invention with two counter-rotating rollers for coating a strip-shaped substrate on both sides,
Fig. 2
a roller with circumferential grooves, an associated supply device and a collecting container in a view of the longitudinal axis of the roller and
Fig. 3
a perspective view of a roller with the associated collecting container.

Eine Vorrichtung 1 nach Figur 1 zur beidseitigen Beschichtung eines bahnförmigen Substrats 2 in Form eines Stahlbandes mit einem metallischen Material, zum Beispiel einer Zinklegierung, umfasst zwei einander gegenüberliegend angeordnete Vorrichtungen 3a und 3b zur jeweils einseitigen Beschichtung, zwischen denen das Substrat 2 kontinuierlich in einer Richtung 4 vertikal nach oben geführt wird. Vor dem Eintritt in die Vorrichtung 1 durchläuft das Substrat 2 eine induktive Heizung 5.A device 1 according to FIG. 1 for coating a web-shaped substrate on both sides 2 in the form of a steel strip with a metallic material, for example one Zinc alloy, comprises two oppositely arranged devices 3a and 3b for the one-sided coating, between which the substrate 2 continuously in one Direction 4 is led vertically upwards. Passes through before entering device 1 the substrate 2 is an inductive heater 5.

Die Vorrichtungen 3a und 3b umfassen jeweils eine Walze 6, eine darunter angeordnete Auffangeinrichtung 7 und ein beide umfassendes Gehäuse 8. Im Auffangbehälter 7 taucht die Walze 6 in ein durch das flüssige Material der Beschichtung gebildetes Bad 9.The devices 3a and 3b each comprise a roller 6, one arranged below it Collecting device 7 and a housing 8 comprising both Roller 6 in a bath 9 formed by the liquid material of the coating.

Zusätzlich fördert eine in axialer Richtung der Walze 6 seitlich an der Auffangeinrichtung 7 angeordnete Pumpe 10 nach Figur 2 das Material der Beschichtung aus dem Bad 9 in einen (nicht dargestellten) inneren Hohlraum der Walze 6. Von hier dringt das Material der Beschichtung durch in umlaufenden Nuten 11a oder 11b angeordnete Durchbrüche 12 auf die Oberfläche 13 der Walze 6. Die Nuten 11a und 11b stellen alternative Ausführungsformen dar, die zweckmäßiger Weise jeweils die Walzenoberfläche insgesamt betreffen.In addition, a conveyor in the axial direction of the roller 6 laterally on the collecting device 7 arranged pump 10 according to FIG. 2 the material of the coating from the bath 9 into one (not shown) inner cavity of the roller 6. From here the material of the Coating through openings 12 arranged in circumferential grooves 11a or 11b on the Surface 13 of the roller 6. The grooves 11a and 11b represent alternative embodiments represents, which suitably relate to the overall roll surface.

Durch die Rotation 14 der Walze 6 entgegen der Bewegungsrichtung 4 des Substrats 2 bildet sich oberhalb der Achsebene 15 der Walzen 6 ein Kontaktbereich 16, in dem das Material der Beschichtung von der Oberfläche 13 der Walze 6 auf das Substrat 2 übertritt.Forms by the rotation 14 of the roller 6 against the direction of movement 4 of the substrate 2 there is a contact area 16 above the axis plane 15 of the rollers 6, in which the material of the Coating passes from the surface 13 of the roller 6 onto the substrate 2.

Durch eine Verstellung der Walze 6 nach Figur 3 in der Achsebene 15 sowohl in axialer Richtung 17 als auch in radialer Richtung 18 können die Vorrichtungen 3a und 3b leicht an unterschiedliche Eigenschaften des Substrats 2, der metallischen Flüssigkeit und an die gewünschte Dicke der Beschichtung angepasst werden. Durch Vergrößern des Abstandes zwischen Substrat 2 und Walze 6 in radialer Richtung 18 können außerdem Unterbrechungen der Beschichtung ausgeführt werden.By adjusting the roller 6 according to FIG. 3 in the axial plane 15 both axially In the direction 17 as well as in the radial direction 18, the devices 3a and 3b can easily be attached different properties of the substrate 2, the metallic liquid and the desired thickness of the coating can be adjusted. By increasing the distance There may also be interruptions between substrate 2 and roller 6 in the radial direction 18 of the coating.

Claims (10)

Verfahren zum Aufbringen einer Beschichtung auf ein bahnförmiges Gut, wobei das Material der Beschichtung im schmelzflüssigen Zustand mittels mindestens einer rotierenden Walze aufgebracht wird, durch Abkühlen erstarrt und sich mit dem Substrat verbindet, wobei mindestens auf einem Abschnitt des Mantels der Walze ein Film des Materials der Beschichtung erzeugt wird und das Substrat in einem solchen Abstand relativ zu der Walze geführt wird, dass in einem Kontaktbereich das Material der Beschichtung kontinuierlich von der Walze auf die Oberfläche des Substrats fließt, dadurch gekennzeichnet, dass das flüssige Material der Beschichtung aus einem inneren Hohlraum der Walze durch Durchbrüche auf den Mantel der Walze gefördert wird.Method for applying a coating to a web-like material, the material of the coating being applied in the molten state by means of at least one rotating roller, solidifying by cooling and bonding to the substrate, a film of the material of the roller being applied to at least a portion of the shell of the roller Coating is generated and the substrate is guided at such a distance relative to the roller that the material of the coating flows continuously from the roller onto the surface of the substrate in a contact area, characterized in that the liquid material of the coating from an inner cavity of the Roller is promoted through breakthroughs on the roll's jacket. Verfahren nach dem vorgenannten Anspruch, dadurch gekennzeichnet, dass das bahnförmige Gut in seine Längsrichtung relativ zu der ortsfesten Walze und im Kontaktbereich im Wesentlichen vertikal aufwärts bewegt wird.Method according to the preceding claim, characterized in that the web-like material is moved substantially vertically upwards in its longitudinal direction relative to the stationary roller and in the contact area. Verfahren nach mindestens einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass das bahnförmige Gut ein metallisches Band und das Material der Beschichtung ein Metall ist, wobei der Schmelzpunkt der Beschichtung kleiner als der Schmelzpunkt des bahnförmigen Guts ist.Method according to at least one of the preceding claims, characterized in that the sheet-like material is a metallic strip and the material of the coating is a metal, the melting point of the coating being less than the melting point of the sheet-like material. Verfahren nach mindestens einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass im Kontaktbereich die Bewegungsrichtungen der zu beschichtenden Oberfläche und des Mantels der Walze einander entgegengesetzt sind.Method according to at least one of the preceding claims, characterized in that the directions of movement of the surface to be coated and the shell of the roller are opposite to each other in the contact area. Vorrichtung (1) zum Aufbringen einer Beschichtung auf ein bahnförmiges Gut (2), wobei das Material der Beschichtung in schmelzflüssigem Zustand mittels mindestens einer rotierbaren Walze (6) aufbringbar ist, wonach es durch Abkühlen erstarrt und sich mit dem bahnförmigen Gut (2) verbindet, wobei mindestens auf einem Abschnitt des Mantels (13) ein Film des Materials der Beschichtung erzeugbar ist und das bahnförmige Gut (2) in einem solchen Abstand zu der Walze (6) führbar ist, dass in einem Kontaktbereich (16) das Material der Beschichtung kontinuierlich von dem Mantel (13) der Walze (6) auf das bahnförmige Gut (2) fließt, dadurch gekennzeichnet, dass eine Walze (6) einen inneren Hohlraum aufweist, der mit unter Druck stehendem flüssigen Material der Beschichtung beaufschlagbar ist, und dass die Walze (6) mit Durchbrüchen (12) für einen Austritt des flüssigen Materials aus dem Hohlraum auf den Mantel (13) versehen ist.Device (1) for applying a coating to a sheet-like material (2), the material of the coating being able to be applied in the molten state by means of at least one rotatable roller (6), after which it solidifies by cooling and bonds to the sheet-like material (2) A film of the material of the coating can be produced at least on a section of the jacket (13) and the sheet-like material (2) can be guided at such a distance from the roller (6) that the material of the coating is in a contact area (16) continuously to the roll (6) flows from the jacket (13) on said belt-shaped material (2), characterized in that a roller (6) having an inner cavity which can be supplied with pressurized liquid material of the coating, and that the Roller (6) is provided with openings (12) for the liquid material to emerge from the cavity onto the jacket (13). Vorrichtung nach dem vorgenannten Anspruch, dadurch gekennzeichnet, dass auf gegenüberliegenden Seiten des bahnförmiges Guts (2) jeweils mindestens eine Walze (6) angeordnet ist.Device according to the preceding claim, characterized in that at least one roller (6) is arranged on opposite sides of the web-like material (2). Vorrichtung nach mindestens einem der vorgenannten Vorrichtungsansprüche, dadurch gekennzeichnet, dass auf einer zu beschichtenden Oberfläche Walzen (6) in Richtung der Relativbewegung von Walze (6) und bahnförmigem Gut (2) hintereinander angeordnet sind, mit denen verschiedene Materialien zur Beschichtung aufbringbar sind.Device according to at least one of the aforementioned device claims, characterized in that rollers (6) are arranged one behind the other on a surface to be coated in the direction of the relative movement of roller (6) and web-like material (2), with which different materials for coating can be applied. Vorrichtung nach mindestens einem der vorgenannten Vorrichtungsansprüche, dadurch gekennzeichnet, dass eine Walze (6) zumindest über einen Teil ihres Umfangs beheizbar ist.Device according to at least one of the aforementioned device claims, characterized in that a roller (6) can be heated at least over part of its circumference. Vorrichtung nach einem der vorgenannten Vorrichtungsansprüche, dadurch gekennzeichnet, dass Durchbrüche (12) innerhalb von wendelförmig mit konstanter Steigung verlaufenden Nuten (11a) im Mantel (13) einer Walze (6) angeordnet sind.Device according to one of the aforementioned device claims, characterized in that openings (12) are arranged within helical grooves (11a) in the casing (13) of a roller (6) with a constant slope. Vorrichtung nach einem der vorgenannten Vorrichtungsansprüche, dadurch gekennzeichnet, dass Durchbrüche (12) innerhalb von senkrecht zur Längsachse einer Walze (6) verlaufenden und äquidistant zueinander angeordneten Nuten (11b) im Mantel (13) einer Walze (6) angeordnet sind.Device according to one of the above-mentioned device claims, characterized in that openings (12) are arranged within grooves (11b) in the casing (13) of a roller (6) which are arranged perpendicularly to the longitudinal axis of a roller (6) and are arranged equidistantly to one another.
EP02017471A 2001-08-14 2002-08-05 Process and apparatus for coating with a melted product Expired - Lifetime EP1284164B1 (en)

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DE10139923A DE10139923A1 (en) 2001-08-14 2001-08-14 Method and device for molten coating
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CN115478238A (en) * 2022-08-29 2022-12-16 上海天阳钢管有限公司 Photovoltaic solder strip processing is with scribbling tin device

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EP1284164B1 (en) 2006-03-15
ATE320319T1 (en) 2006-04-15

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