EP0036098A1 - Process and apparatus for the single-faced coating of a continuous strip - Google Patents
Process and apparatus for the single-faced coating of a continuous strip Download PDFInfo
- Publication number
- EP0036098A1 EP0036098A1 EP81101229A EP81101229A EP0036098A1 EP 0036098 A1 EP0036098 A1 EP 0036098A1 EP 81101229 A EP81101229 A EP 81101229A EP 81101229 A EP81101229 A EP 81101229A EP 0036098 A1 EP0036098 A1 EP 0036098A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- roller
- strip
- coating medium
- belt
- 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.)
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Links
- 238000000576 coating method Methods 0.000 title claims abstract description 87
- 239000011248 coating agent Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 9
- 238000002425 crystallisation Methods 0.000 claims description 4
- 230000008025 crystallization Effects 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000005246 galvanizing Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 34
- 229910052725 zinc Inorganic materials 0.000 description 32
- 239000011701 zinc Substances 0.000 description 32
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000007654 immersion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005494 tarnishing Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Images
Classifications
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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
- B05C1/0804—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 material being applied without contact with the roller
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- 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
- C23C2/0034—Details related to elements immersed in bath
- C23C2/00342—Moving elements, e.g. pumps or mixers
- C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
-
- 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
-
- 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
- C23C2/0062—Pattern or selective deposits without pre-treatment of the material to be coated, e.g. using masking elements such as casings, shields, fixtures or blocking elements
-
- 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
- C23C2/50—Controlling or regulating the coating processes
Definitions
- metal sheet with deep-drawing qualities provided on one side with a metallic coating is required, the side of which is left without coating and which is on the outside of the finished vehicle must be undamaged and paintable, while the coated, in particular galvanized side which is on finished vehicle is inside, the coating is protected against corrosion.
- Various methods have already been developed for providing metal strips with metallic coatings on one side, but so far they have not given satisfactory results.
- a two-sided coating is first applied in a previously conventional manner by being dipped into the liquid coating medium, which coating is then removed again on one side by electrolytic means. Aside from the high energy costs that this process requires, it is impossible to completely remove the influence of electrolytic dezincification from the side on which the coating is to be retained.
- Another known method proposes to apply a chemical to one side of the sheet, which prevents the metallic coating material from sticking permanently.
- this requires a complex pretreatment of the sheet to be degreased, which also requires new operating systems for this special treatment and must lead to profound changes to existing systems for double-sided coating.
- the chemicals contaminate the zinc bath and do not remain without effect on the further treatment of the zinc-free surface of the strip, especially with regard to later painting.
- a method for one-sided metallic coating of tapes which provides for the tape to be coated to be passed in the stretched state at a slight distance above the level of the liquid coating medium in a container and at the same time to produce an upward flow in the interior of the bath, which causes wetting of the lower surface of the strip with the coating medium.
- the known method also provides for this side to be provided with a gas cushion by which the coating medium is pressed away.
- the disadvantage of this method is that the uniformity of the coating can hardly be guaranteed because, on the one hand, the strip guided horizontally over the bath surface cannot have a precisely defined distance from the bath surface due to rolling defects and uneven running over the deflection rollers, and on the other hand the flow generated in the bath cannot be produced so uniformly that uniform wetting of the belt surfaces must be ensured.
- the German published patent application 28 19 142 has disclosed a method and a device for one-sided coating, in which the strip to be coated is guided around a deflection roller located above the coating medium, under which, parallel to the axis, a scooping roller is partially inside, in order to create exact geometric relationships of the coating medium is arranged, the scoop roller conveying the coating medium out of the container into the gap between scoop roller jacket and belt surface and through it. Acknowledging this The solution is that an exactly adjustable layer thickness can be achieved due to the forced guidance of the molten metal through the gap between the deflection roller and scoop roller, excess coating material being squeezed off.
- the layer thickness should be adjustable by changing the contact pressure.
- the object of the present invention is to create, on the basis of the last-described state of the art, a device for one-sided coating of continuous strip, which can be used as an additional device for existing systems for double-sided coating of metal strip, for a perfect, uniform metallic coating of the continuous strip with little construction effort permitted with exact adjustability of the coating thickness.
- a method which is characterized in that the coating medium is conveyed against the surface of the belt at least in the amount necessary for applying the desired coating thickness against the direction of belt travel.
- the proposed method thus differs from the prior art in that the coating medium is no longer "pressed” through the gap between the scoop and deflection roller, but in that the strip surface is wetted with the coating medium, with a flow directed against the strip passage direction against the strip surface is produced.
- a device which is characterized in that the scoop roller is rotated in the opposite direction to the belt running direction and a slight gap is provided between the scoop roller shell and the belt surface, which allows the roll to rotate freely.
- This proposal allows an optimal coating in that the dipping roller immersed in the coating medium, which rotates in the opposite direction to the tape running direction, due to its friction between the outer surface and the coating medium, the latter in the area of Gaps between scoop roller and belt and not only creates a constant supply of coating medium there, which can be applied to the belt in a constant amount and quality, but also creates a flow that presses the coating medium against the belt.
- the coating thickness is particularly uniform because without mechanical squeezing or pressing on the coating medium as in the prior art, the sufficiently offered coating medium, as it is in the Practice has shown, brings a particularly good coating result.
- the scoop roller is mounted in a container which is arranged above a storage container, preferably the melting tank, from which the coating medium can be pumped into the first container and returned to it.
- a storage container preferably the melting tank
- an adjustable weir or similar device is provided on the container holding the coating roll in order to control the level of the strip surface of the coating medium.
- Such a weir forms an overflow for the coating medium pumped into the container, which runs back into the storage container directly as a result of the arrangement of the container above it.
- an always defined and adjustable bath surface can be guaranteed, so that the immersion depth of the scoop roller, which is important for the thickness of the coating to be applied, can be set exactly.
- the amount of coating medium scooped can thereby be controlled very precisely.
- a distribution channel which extends into the area of the gap between scoop roller jacket and belt surface and extends approximately over the bandwidth, with which additional coating medium can be brought from one of the containers into the coating zone.
- the supply of coating material in the gap between the deflection roller and the coating roller can be improved if necessary.
- the deflecting roller in the strip transport direction behind the gap between the strip surface and the coating roller jacket has a nozzle knife for controlling the desired layer thickness and / or a device for introducing crystallization nuclei is provided in the layer by means of a gas stream. While the nozzle knife can regulate the thickness of the coating in a known manner, the solidification behavior of the applied coating medium can be influenced by the introduction of crystallization nuclei, so that the quality of the surface can be influenced in a positive way.
- Fig. 1, 1 is the protective gas housing in which the device according to the invention is housed.
- 2 denotes the ceramic-coated deflection roller for the continuous sheet metal strip B to be coated on one side with zinc.
- the direction of rotation of the deflection roller 2 is indicated by the arrow in the cross section of the roller.
- the rotary driven scoop roller is designated, which is largely immersed in the zinc trough 4 and whose direction of rotation is also indicated by an arrow.
- the zinc trough 4 has a height-adjustable weir, which is indicated at 5. By means of this weir, the level of the zinc in the zinc trough 4 can be adjusted so that the depth of immersion of the scoop roller 3 in the zinc bath of the zinc trough 4 can be varied.
- the zinc pump 6 designates the zinc pump, with the aid of which the liquid zinc can be pumped from the zinc tub 7 located below the zinc tub 4 into the zinc tub 4.
- the zinc tub 7 is the zinc kettle into which the continuous strip is immersed, even when the strip is coated on both sides.
- the nozzle knife is designated, with whose gas jet the thickness of the not yet solidified zinc layer can be adjusted by stripping off the excess zinc.
- a device is provided at 9 with which crystallization nuclei (zinc dust) can be applied to the freshly coated strip, as a result of which a particularly uniform surface can be achieved. Since the entire device is arranged in the protective gas housing shown in FIG. 1, a protective gas lock must be provided at the exit of the strip from this housing, which ensures a seal against the normal atmosphere.
- Fig. 2 the same parts are labeled the same.
- the guide plate is indicated at 12, with the aid of which liquid zinc 11 can be conducted into the gap between the deflection roller 2 and the scoop roller 3, which is previously pumped from the zinc trough 4 onto the guide plate 12 by means of the zinc pump 13.
- the supply of liquid zinc in the gap between the deflection roller and scoop roller can be improved, so that the uniformity of the coating is optimized.
- the belt to be coated running in the direction of the arrow around the deflection roller 2 is not touched by the outer surface of the scoop roller 3, but the gap between the belt surface and the scoop roller jacket is extremely small.
- the gap serves only for the contact-free rotation of the scoop roller 3, which, as the arrows indicate, rotates in the opposite direction to the deflection roller 2.
- the scoop roller 3 is immersed with the largest part of its circumference in the zinc bath of the zinc trough 4, when the driven scoop roller 3 is rotated, liquid zinc is carried along by adhesion to the surface of the scoop roller 3 and in the vicinity of the gap between the scoop roller 3 and the deflection roller 2 or the band B carried over it.
- the surface of the strip B is wetted with the liquid zinc, which adheres to the surface in a certain layer thickness and is carried along as a coating.
- the particularly favorable coating results from the fact that the belt B runs in the opposite direction to the scoop roller 3 and a constant amount of zinc is always pressed in the gap between the two rollers. This results in an even better effect than when the strip is passed through a zinc bath, because the strip is not only wetted by the "offered" liquid coating medium but also generates the described flow against the strip surface by the counter-rotating scoop roller.
- the additionally provided device for guiding the liquid zinc 11 with the aid of the guide plate 12 only serves to improve the zinc supply in the gap.
Abstract
Description
In letzterer Zeit wird, insbesondere von der Automobilindustrie, einseitig mit einem metallischen überzug versehenes Blech mit Tiefziehqualitäten verlangt, dessen ohne überzug bleibende Seite, die am fertigen Fahrzeug außen liegt, unbeschädigt und lackierfähig sein muß, während die beschichtete, insbesondere verzinkte Seite, die am fertigen Fahrzeug innen liegt, durch den überzug gegen Korrosion geschützt ist. Es sind bereits verschiedene Verfahren entwickelt, um Metallband einseitig mit metallischen überzügen zu versehen, die jedoch bislang keine befriedigenden Ergebnisse erbringen.In recent times, in particular by the automotive industry, metal sheet with deep-drawing qualities provided on one side with a metallic coating is required, the side of which is left without coating and which is on the outside of the finished vehicle must be undamaged and paintable, while the coated, in particular galvanized side which is on finished vehicle is inside, the coating is protected against corrosion. Various methods have already been developed for providing metal strips with metallic coatings on one side, but so far they have not given satisfactory results.
Bei einem bekannten Verfahren zur Herstellung derartiger Bänder oder Bleche wird zunächst in bisher überlicher Weise durch Eintrauchen in das flüssige Beschichtungsmedium ein zweiseitiger überzug aufgebracht, der dann auf einer Seite auf elektrolytischen Wege wieder abgetragen wird. Abgesehen von den hohen Energiekosten, die dieses Verfahren erfordert, ist es unmöglich, den Einfluß der elektrolytischen Entzinkung völlig von der Seite fernzuhalten, auf der der überzug erhalten bleiben soll.In a known method for producing such strips or sheets, a two-sided coating is first applied in a previously conventional manner by being dipped into the liquid coating medium, which coating is then removed again on one side by electrolytic means. Aside from the high energy costs that this process requires, it is impossible to completely remove the influence of electrolytic dezincification from the side on which the coating is to be retained.
Es ist auch bereits versucht worden, Zink durch Aufsprühen auf nur eine Seite des Bandmaterial aufzubringen oder mittels Vakuumbedampfung aufzutragen. Während im ersteren Fall eine gleichmäßige Schichtdicke des aufgebrachten Beschichtungsmedium nicht zu gewährleisten ist, bringt die Bedampfung infolge des hohen Dampfdruckes technologische Probleme mit, etwa den Schutz der Pumpen oder die Ablagerung an kalten Wandungen.Attempts have also been made to spray zinc onto only one side of the strip material or to apply it by means of vacuum evaporation. While in the former case a uniform layer thickness of the applied coating medium cannot be guaranteed, the evaporation due to the high vapor pressure brings with it technological problems, such as the protection of the pumps or the deposit on cold walls.
Es ist auch vorgeschlagen worden, zwei getrennte Bleche vor der Behandlung im Beschichtungsbad aufeinander zu legen und mit Abdichtungen an den Rändern zu versehen, die verhindern, daß die Badflüssigkeit zwischen die aufeinanderliegenden eingetauchten Bleche eindringt. Dieses Verfahren zeichnet sich zwar durch eine sehr hohe Produktivität aus, bringt jedoch auch Nachteile mit sich. So ist das Zusammenfügen der Bleche vor der Behandlung aufwendig und teuer und schließt eine gewissen Verformung bei der nachfolgenden Trennung nicht aus. Ein anderer Nachteil ist, daß sich dieses Verfahren ohne einschneidende Änderungen an den bestehenden Eintauch- Beschichtungsanlagen nicht vornehmen läßt, so daß die gleichzeitige Verwendung einer solchen Anlage zum einseitigen und beidseitigen Beschichten nicht möglich ist.It has also been proposed to place two separate sheets on top of one another before the treatment in the coating bath and to provide them with seals at the edges which prevent the bath liquid from penetrating between the superimposed immersed sheets. Although this process is characterized by a very high productivity, it also has disadvantages. The joining of the sheets before the treatment is complex and expensive and does not rule out a certain deformation during the subsequent separation. Another disadvantage is that this process can not be carried out without drastic changes to the existing immersion coating systems, so that the simultaneous use of such a system for one-sided and two-sided coating is not possible.
Ein anderes bekanntes Verfahren schlägt vor, auf einer Seite des Bleches eine Chemikalie aufzutragen, durch die ein dauerhaftes Anhaften des metallischen Beschichtungsmaterials verhindert wird. Dies setzt jedoch eine aufwendige Vorbehandlung des zu entfettenden Bleches voraus, die ebenfalls neue Betriebsanlagen für diese Spezialbehandlung erforderlich macht und zu tiefgreifenden Änderungen an bestehenden Anlagen zur doppelseitigen Beschichtung führen muß. Außerdem verunreinigen die Chemikalien das Zinkbad und bleiben nicht ohne Auswirkung auf die Weiterbehandlunn der zinkfreien Oberfläche des Bandes, insbesondere im Hinblick auf späteren Anstrich.Another known method proposes to apply a chemical to one side of the sheet, which prevents the metallic coating material from sticking permanently. However, this requires a complex pretreatment of the sheet to be degreased, which also requires new operating systems for this special treatment and must lead to profound changes to existing systems for double-sided coating. In addition, the chemicals contaminate the zinc bath and do not remain without effect on the further treatment of the zinc-free surface of the strip, especially with regard to later painting.
Schließlich ist ein Verfahren zum einseitigen metallischen Beschichten von Bändern bekanntgeworden, welches vorsieht, das zu beschichtende Band im gestreckten Zustand in geringem Abstand oberhalb des Pegels des in einem Behälter befindlichen flüssigen Beschichtungsmediums vorbeizuführen und gleichzeitig im Inneren des Bades eine nach aufwärts gerichtete Strömung zu erzeugen, die ein Benetzen der unteren Bandoberfläche mit dem Beschichtungsmedium bewirkt. Um zu verhindern, daß die der Badoberfläche abgekehrte Seite des Bandes durch das Beschichtungsmedium berührt wird, ist nach dem bekannten Verfahren außerdem vorgesehen, diese Seite mit einem Gaskissen zu beaufschlagen, durch das das Beschichtungsmedium weggedrückt wird. Der Nachteil dieses Verfahrens besteht darin, daß die Gleichmäßigkeit der Beschichtung kaum zu gewährleisten ist, weil einerseits das horizontal über die Badoberfläche geführte Band infolge Walzfehler und ungleichmäßigem Lauf über die Umlenkrollen keinen exakt definierten Abstand von der Badoberfläche haben kann und andererseits die im Bad erzeugte Strömung nicht so gleichmäßig zu erzeugen ist, das ein gleichförmiges Benetzen der Bandoberflächen sicherzustellen ist.Finally, a method for one-sided metallic coating of tapes has become known, which provides for the tape to be coated to be passed in the stretched state at a slight distance above the level of the liquid coating medium in a container and at the same time to produce an upward flow in the interior of the bath, which causes wetting of the lower surface of the strip with the coating medium. In order to prevent the side of the strip facing away from the bath surface from being touched by the coating medium, the known method also provides for this side to be provided with a gas cushion by which the coating medium is pressed away. The disadvantage of this method is that the uniformity of the coating can hardly be guaranteed because, on the one hand, the strip guided horizontally over the bath surface cannot have a precisely defined distance from the bath surface due to rolling defects and uneven running over the deflection rollers, and on the other hand the flow generated in the bath cannot be produced so uniformly that uniform wetting of the belt surfaces must be ensured.
Durch die deutsche Offenlegungsschrift 28 19 142 ist ein Verfahren und eine Vorrichtung zum einseitigen Beschichten bekannt geworden, bei der das zu beschichtende Band zur Schaffung exakter geometrischer Verhältnisse um eine oberhalb des Beschichtungsmediums befindliche Umlenkrolle geführt ist, unter der, achsparallel dazu, eine Schöpfrolle teilweise innerhalb des Beschichtungsmediums angeordnet ist, wobei die Schöpfrolle das Beschichtungsmedium aus dem Behälter heraus in den Spalt zwischen Schöpfrollenmantel und Bandoberfläche sowie durch diese hindurch fördert. Die Erkenntnis dieser Lösung besteht darin, daß sich eine exakt einstellbare Schichtdicke infolge der Zwangsführung des schmelzflüssigen Metalls durch den Spalt zwischen Umlenkrolle und Schöpfrolle hindurch erreichen läßt, wobei überschüssiges Beschichtungsmaterial abgequetscht wird. Durch Verändern des Anpreßdruckes soll die Schichtdicke einstellbar sein. Diese vorbekannte Lösung führt jedoch in der Praxis nicht zu dem gewünschten Ergebnis; vielmehr ist die Gleichmäßigkeit der Schichtdicke, insbesondere bei dickeren Beschichtungen nicht erreichbar. Die Einstellung der Beschichtungsdicke ist schwierig durchzuführen, Verunreinigungen im Beschichtungsmedium wie z. B. Hartzinkteile oder Schlacke werden durch den Spalt hindurchgepreßt und in die beschichtete Bandoberfläche "eingebügelt".The German published patent application 28 19 142 has disclosed a method and a device for one-sided coating, in which the strip to be coated is guided around a deflection roller located above the coating medium, under which, parallel to the axis, a scooping roller is partially inside, in order to create exact geometric relationships of the coating medium is arranged, the scoop roller conveying the coating medium out of the container into the gap between scoop roller jacket and belt surface and through it. Acknowledging this The solution is that an exactly adjustable layer thickness can be achieved due to the forced guidance of the molten metal through the gap between the deflection roller and scoop roller, excess coating material being squeezed off. The layer thickness should be adjustable by changing the contact pressure. In practice, however, this previously known solution does not lead to the desired result; rather, the uniformity of the layer thickness cannot be achieved, particularly in the case of thicker coatings. The adjustment of the coating thickness is difficult to carry out, impurities in the coating medium such. B. hard zinc parts or slag are pressed through the gap and "ironed" into the coated strip surface.
Aufgabe der vorliegenden Erfindung ist es, ausgehend von dem zuletzt geschilderten Stand der Technik eine Vorrichtung zum einseitigen Beschichten von endlos durchlaufendem Band zu schaffen, die als Zusatzeinrichtung zu vorhandenen Anlagen zum beidseitigen Beschichten von Metallband anwendbar ein einwandfreies gleichmäßiges metallisches Beschichten des durchlaufenden Bandes mit geringem Bauaufwand bei exakter Einstellbarkeit der Beschichtungsdicke gestattet.The object of the present invention is to create, on the basis of the last-described state of the art, a device for one-sided coating of continuous strip, which can be used as an additional device for existing systems for double-sided coating of metal strip, for a perfect, uniform metallic coating of the continuous strip with little construction effort permitted with exact adjustability of the coating thickness.
Zur Lösung der Aufgabe wird ein Verfahren vorgeschlagen, daß dadurch gekennzeichnet ist, daß das Beschichtungsmedium mindestens in der für das Aufbringen der gewünschten Beschichtungsdicke notwendigen Menge entgegen der Banddurchlaufrichtung gegen die Oberfläche des Bandes gefördert wird. Das vorgeschlagene Verfahren unterscheidet sich somit vom Stand der Technik dadurch, daß das Beschichtungsmedium nicht mehr durch den Spalt zwischen Schöpf- und Umlenkrolle "hindurchgepreßt" wird sondern daß die-Bandoberfläche mit dem Beschichtungsmedium benetzt wird, wobei eine gegen die Banddurchlaufrichtung gerichtete Strömung gegen die Bandoberfläche erzeugt wird.To achieve the object, a method is proposed which is characterized in that the coating medium is conveyed against the surface of the belt at least in the amount necessary for applying the desired coating thickness against the direction of belt travel. The proposed method thus differs from the prior art in that the coating medium is no longer "pressed" through the gap between the scoop and deflection roller, but in that the strip surface is wetted with the coating medium, with a flow directed against the strip passage direction against the strip surface is produced.
Zur Durchführung des Verfahrens wird eine Vorrichtung vorgeschlagen, die dadurch gekennzeichnet ist, daß die Schöpfrolle gegenläufig zur Bandlaufrichtung drehangetrieben ist und zwischen Schöpfrollenmantel und Bandoberfläche ein die freie Drehbewegung der Rolle gestattender geringfügiger Spalt vorgesehen ist. Dieser Vorschlag gestattet eine optimale Beschichtung dadurch, daß die in das Beschichtungsmedium eintauchende Schöpfrolle, die gegenläufig zur Bandlaufrichtung dreht, infolge ihrer Reibung zwischen der Mantelfläche und dem Beschichtungsmedium letzteres in den Bereich des Spaltes zwischen Schöpfrolle und Band trägt und dort nicht nur einen stets gleichbleibenden Vorrat an Beschichtungsmedium schafft, das auf diese Weise in gleichbleibender Menge und Qualität auf das Band aufgebracht werden kann, sondern auch noch eine Strömung erzeugt, die das Beschichtungsmedium gegen das Band drückt. Das "Festbügeln" von Feststoffen, wie Schlacke oder Zink kann bei diesem Vorschlag nicht mehr auftreten, die Beschichtungsdicke ist besonders gleichmäßig, weil ohne ein mechanisches Abquetschen oder Andrücken des Beschichtungsmedium wie beim Stand der Technik, das ausreichend angebotene Beschichtungsmedium, wie es sich in der Praxis gezeigt hat, ein besonders gutes Beschichtungsergebnis bringt.To carry out the method, a device is proposed which is characterized in that the scoop roller is rotated in the opposite direction to the belt running direction and a slight gap is provided between the scoop roller shell and the belt surface, which allows the roll to rotate freely. This proposal allows an optimal coating in that the dipping roller immersed in the coating medium, which rotates in the opposite direction to the tape running direction, due to its friction between the outer surface and the coating medium, the latter in the area of Gaps between scoop roller and belt and not only creates a constant supply of coating medium there, which can be applied to the belt in a constant amount and quality, but also creates a flow that presses the coating medium against the belt. The "ironing" of solids such as slag or zinc can no longer occur in this proposal, the coating thickness is particularly uniform because without mechanical squeezing or pressing on the coating medium as in the prior art, the sufficiently offered coating medium, as it is in the Practice has shown, brings a particularly good coating result.
Nach einem anderen Merkmal der Erfindung ist vorgesehen, daß die Schöpfrolle in einem Behälter gelagert ist, der oberhalb eines Vorratsbehälters, vorzugsweise des Schmelzkessels angeordnet ist, aus dem das Beschichtungsmedium in den ersten Behälter pumpbar und in diesen rückführbar ist. Dadurch läßt sich in vorteilhafter Weise die vorgeschlagene Vorrichtung bei Bedarf in bestehende Anlagen zum beidseitigen Beschichten einbauen, ohne daß größere Änderungen erforderlich werden.According to another feature of the invention, it is provided that the scoop roller is mounted in a container which is arranged above a storage container, preferably the melting tank, from which the coating medium can be pumped into the first container and returned to it. As a result, the proposed device can advantageously be installed in existing systems for coating on both sides without major changes being necessary.
Nach einem anderen besonderen Merkmal der Erfindung ist vorgesehen, daß zur Steuerung des Niveaus der Bandoberfläche des Beschichtungsmediums ein einstellbares Wehr oder dergleichen Einrichtung an dem die Beschichtungsrolle aufnehmenden Behälter vorgesehen ist. Ein solches Wehr bildet einen überlauf für das in den Behälter gepumpte Beschichtungsmedium, das infolge der Anordnung des Behälters über dem Vorratsbehälter direkt in diesen zurückläuft. Auf diese Weise läßt sich eine stets definierte und einstellbare Badoberfläche gewährleisten, so daß die Eintauchtiefe der Schöpfrolle die für die Dicke der aufzubringenden Beschichtung von Bedeutung ist, exakt einstellbar ist. Die Menge des geschöpften Beschichtungsmediums läßt sich dadurch sehr genau steuern.According to another special feature of the invention, it is provided that an adjustable weir or similar device is provided on the container holding the coating roll in order to control the level of the strip surface of the coating medium. Such a weir forms an overflow for the coating medium pumped into the container, which runs back into the storage container directly as a result of the arrangement of the container above it. In this way, an always defined and adjustable bath surface can be guaranteed, so that the immersion depth of the scoop roller, which is important for the thickness of the coating to be applied, can be set exactly. The amount of coating medium scooped can thereby be controlled very precisely.
Nach einem weiteren Merkmal der Erfindung wird vorgeschlagen, daß oberhalb der Schöpfrolle eine in den Bereich des Spaltes zwischen Schöpfrollenmantel und Bandoberfläche hineinreichende, sich etwa über die Bandbreite erstrekkenden Verteilungsrinne angeordnet ist, mit der zusätzlich Beschichtungsmedium aus einem der Behälter in die Beschichtungszone bringbar ist. Durch diesen Vorschlag kann bei Bedarf das Angebot von Beschichtungsmaterial im Spalt zwischen Umlenkrolle und Beschichtungsrolle noch verbessert werden. Weiterhin wird vorgeschlagen, die Mantelfläche der Umlenkrolle mit einem das Beschichtungsmedium abweisenden Werkstoff, beispielsweise Keramik, zu beschichten. Dadurch wird sichergestellt, daß möglicherweise zwischen Band- und Umlenkrolle geratendes Beschichtungsmedium sich nicht auf der Umlenkrolle festsetzt und dort zu Beschädigungen der beschichtungsfreien Bandoberfläche führt.According to a further feature of the invention, it is proposed that above the scoop roller is arranged a distribution channel which extends into the area of the gap between scoop roller jacket and belt surface and extends approximately over the bandwidth, with which additional coating medium can be brought from one of the containers into the coating zone. With this proposal, the supply of coating material in the gap between the deflection roller and the coating roller can be improved if necessary. Furthermore, it is proposed to coat the outer surface of the deflection roller with a material that repels the coating medium, for example ceramic. This ensures that coating medium possibly caught between the belt and deflection roller does not get stuck on the deflection roller and leads to damage to the coating-free surface of the belt.
Um die Qualität und Dicke der beschichteten Seite des Bandes zu beeinflussen, ist nach einem anderen Merkmal der Erfindung vorgeschlagen, das der Umlenkrolle in Bandtransportrichtung hinter dem Spalt zwischen Bandoberfläche und Beschichtungsrollenmantel ein Düsenmesser zur Steuerung der gewünschten Schichtdicke und/oder eine Vorrichtung zum Einbringen von Kristallisationskeimen in die Schicht mittels eines Gasstromes vorgesehen ist. Während das Düsenmmesser in bekannter Weise die Dicke der Beschichtung regeln kann, kann durch das Einbringen von Kristallisationskeimen das Erstarrungsverhalten des aufgebrachten Beschichtungsmedium beeinflußt werden, so daß die Qualität der Oberfläche im positiven Sinn beeinflußbar ist.In order to influence the quality and thickness of the coated side of the strip, it is proposed according to another feature of the invention that the deflecting roller in the strip transport direction behind the gap between the strip surface and the coating roller jacket has a nozzle knife for controlling the desired layer thickness and / or a device for introducing crystallization nuclei is provided in the layer by means of a gas stream. While the nozzle knife can regulate the thickness of the coating in a known manner, the solidification behavior of the applied coating medium can be influenced by the introduction of crystallization nuclei, so that the quality of the surface can be influenced in a positive way.
Um die Oxidation oder das Anlaufen der Bandoberfläche zu verhindern empfiehlt es sich nach einem anderen Merkmal der Erfindung die Vorrichtung unter Schutzgas zu betreiben, wobei das Schutzgas gleichzeitig zur Kühlung des Bandes verwendbar ist.In order to prevent the oxidation or tarnishing of the belt surface, it is recommended according to another feature of the invention to operate the device under protective gas, the protective gas being simultaneously usable for cooling the belt.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt und nachfolgend beschrieben. Es zeigt:
- Fig. 1 einen Querschnitt durch eine erfindungsgemäße Vorrichtung zum Verzinken von Stahlblech,
- Fig. 2 eine vergrößerte Darstellung der Beschichtungsvorrichtung mit Verteilungsrinne.
- 1 shows a cross section through an inventive device for galvanizing sheet steel,
- Fig. 2 is an enlarged view of the coating device with distribution channel.
In Fig. 1 ist mit 1 das Schutzgasgehäuse bezeichnet, in dem die erfindungsgemäße Vorrichtung untergebracht ist. 2 bezeichnet die keramikbeschichtete Umlenkrolle für das durchlaufende, einseitig mit Zink zu beschichtende Blechband B. Die Drehrichtung der Umlenkrolle 2 ist durch den Pfeil im Querschnitt der Rolle angegeben. Mit 3 ist die drehangetriebene Schöpfrolle bezeichnet, die größtenteils in die Zinkwanne 4 eingetaucht ist und deren Drehrichtung ebenfalls durch eine Pfeil angegeben ist. Die Zinkwanne 4 weist ein höhenverstellbares Wehr auf, das bei 5 angedeutet ist. Durch dieses Wehr kann der Pegel des Zinks in der Zinkwanne 4 eingestellt werden, so daß sich die Eintauchtiefe der Schöpfrolle 3 in das Zinkbad der Zinkwanne 4 variieren läßt. Mit 6 ist die Zinkpumpe bezeichnet, mit deren Hilfe das flüssige Zink aus dem unterhalb der Zinkwanne 4 befindlichen Zinkbottich 7 in die Zinkwanne 4 pumpbar ist. Der Zinkbottich 7 ist im Ausführungsbeispiel der Zinkkessel, in den auch bei beidseitiger Bandbeschichtung das durchlaufende Band eintaucht.In Fig. 1, 1 is the protective gas housing in which the device according to the invention is housed. 2 denotes the ceramic-coated deflection roller for the continuous sheet metal strip B to be coated on one side with zinc. The direction of rotation of the
Mit 8 ist das Düsenmesser bezeichnet, mit dessen Gasstrahl sich die Dicke der noch nicht erstarrten Zinkschicht dadurch einstellen läßt, daß das überschüssige Zink abgestreift wird.With 8 the nozzle knife is designated, with whose gas jet the thickness of the not yet solidified zinc layer can be adjusted by stripping off the excess zinc.
Zur Unterdrückung von Zinkblumen ist bei 9 eine Einrichtung vorgesehen, mit der Kristallisationskeime (Zinkstaub) auf das frisch beschichtete Band aufgebracht werden können, wodurch eine besonders gleichmäßige Oberfläche erzielbar ist. Da die gesamte Vorrichtung in den bei 1 dargestellten Schutzgasgehäuse angeordnet ist, muß am Austritt des Bandes aus diesem Gehäuse eine Schutzgasschleuse vorgesehen sein, die einen Abschluß gegenüber der normalen Atmosphäre sicherstellt.To suppress zinc flowers, a device is provided at 9 with which crystallization nuclei (zinc dust) can be applied to the freshly coated strip, as a result of which a particularly uniform surface can be achieved. Since the entire device is arranged in the protective gas housing shown in FIG. 1, a protective gas lock must be provided at the exit of the strip from this housing, which ensures a seal against the normal atmosphere.
In Fig. 2 sind gleiche Teile gleich bezeichnet. Darüberhinaus ist bei 12 das Leitblech angedeutet, mit dessen Hilfe flüssiges Zink 11 in den Spalt zwischen Umlenkrolle 2 und Schöpfrolle 3 leitbar ist, das zuvor mittels der Zinkpumpe 13 aus der Zinkwanne 4 auf das Leitblech 12 gepumpt wird. Durch dieses Leitblech 12 läßt sich das Angebot an flüssigem Zink im Spalt zwischen Umlenkrolle und Schöpfrolle verbessern, so daß die Gleichmäßitkeit der Beschichtung optimiert wird.In Fig. 2, the same parts are labeled the same. In addition, the guide plate is indicated at 12, with the aid of which
Das in Pfeilrichtung um die Umlenkrolle 2 laufende zu beschichtende Band wird durch die Mantelfläche der Schöpfrolle 3 nicht berührt, jedoch ist der Spalt zwischen Bandoberfläche und Schöpfrollenmantel äußerst gering. Der Spalt dient lediglich der berührungsfreien Drehung der Schöpfrolle 3, die, wie die Pfeile andeuten, in entgegengesetzter Richtung als die Umlenkrolle 2 dreht. Dadurch, daß die Schöpfrolle 3 mit dem größten Teil ihres Umfanges in das Zinkbad der Zinkwanne 4 eintaucht, wird beim Drehen der angetriebenen Schöpfrolle 3 flüssiges Zink durch Adhäsion an der Oberfläche der Schöpfrolle 3 mitgenommen und in die Nähe des Spaltes zwischen Schöpfrolle 3 und Umlenkrolle 2 bzw. dem darüber geführten Band B getragen. Dadurch wird die Oberfläche des Bandes B mit dem flüssigen Zink benetzt, das sich in einer bestimmten Schichtdicke an der Oberfläche ansetzt und als Beschichtung mitgeführt wird. Die besonders günstige Beschichtung ergibt sich dadurch, daß das Band B in entgegengesetzter Richtung läuft als die Schöpfrolle 3 und stets eine gleichmäßige Menge Zink in dem Spalt zwischen beiden Rollen gedrückt wird. Dadurch ergibt sich ein noch besserer effekt als beim Durchführen des Bandes durch ein Zinkbad, weil das Band nicht nur von dem "angebotenen" flüssigen Beschichtungsmedium benetzt wird sondern durch die entgegensetzt umlaufende Schöpfrolle noch die beschriebene Strömung gegen die Bandoberfläche erzeugt wird. Die zusätzlich vorgesehene Einrichtung zum Führen des flüssigen Zinkes 11 mit Hilfe des Leitbleches 12 dient lediglich der Verbesserung des Zinkangebotes im Spalt.The belt to be coated running in the direction of the arrow around the
Claims (8)
dadurch gekennzeichnet,
daß das Beschichtungsmedium mindestens in der für das Aufbringen der gewünschten Beschichtungsdicke notwendigen Menge entgegen der Banddurchlaufrichtung gegen die Oberfläche des Bandes gefördert wird.1.Procedure for one-sided coating of continuously running strip, in particular for galvanizing steel strip, which is guided above the liquid coating medium in a container within a protective gas atmosphere around a horizontally rotating deflection roller, with an axis parallel to the deflection roller in the coating medium with at least the Half of its circumference is immersed scoop roller with which the coating medium is conveyed against the belt surface,
characterized,
that the coating medium is conveyed against the surface of the belt at least in the amount necessary for applying the desired coating thickness against the direction of belt travel.
dadurch gekennzeichnet,
daß die Schöpfrolle (3) gegenläufig zur Bandlaufrichtung drehangetrieben ist und zwischen Schöpfrollenmantel und Bandoberfläche ein die freie Drehbewegung der Rolle (3) gestattender geringfügiger Spalt vorgesehen ist.2. Device for performing the method according to claim 1, consisting of a filled with the liquid coating medium, sealed under protective gas container with inlet and outlet lock for the strip to be coated, a horizontally rotating support and deflecting roller above the strip level and an axially parallel thereto , with a scoop roll immersed in the weld pool with at least half of its circumference,
characterized,
that the scoop roller (3) is rotated in the opposite direction to the belt running direction and between the scoop roller jacket and the belt surface there is a slight gap allowing the free rotation of the roller (3).
dadurch gekennzeichnet,
daß die Schöpfrolle in einem Behälter (4) gelagert ist, der oberhalb eines Vorratsbehälters (7), vorzugsweise des Schmelzkessels angeordnet ist, aus dem das Beschichtungsmedium in den ersten Behälter (4) pumpbar (6) und in diesen rückführbar ist.3. Device according to claim 2,
characterized,
that the scoop roller is mounted in a container (4) which is arranged above a storage container (7), preferably the melting tank, from which the coating medium can be pumped (6) into the first container (4) and can be returned to the latter.
dadurch gekennzeichnet,
daß zur Steuerung des Niveaus der Badoberfläche des Beschichtungsmediums ein einstellbares Wehr (5) oder dergleichen Einrichtungen an dem die Beschichtungsrolle (3) aufnehmenden Behälter (4) vorgesehen ist.4. Apparatus according to claim 2 and 3,
characterized,
that to control the level of the bath surface of the coating medium, an adjustable weir (5) or similar devices is provided on the container (4) receiving the coating roller (3).
dadurch gekennzeichnet,
daß oberhalb der Schöpfrolle (3) eine in den Bereich des Spaltes zwischen Schöpfrollenmantel und Bandoberfläche hineinreichende, sich etwa über die Bandbreite erstreckende Verteilungsrinne (12) angeordnet ist, mit der zusätzlich Beschichtungsmedium (11) aus einem der Behälter (4, 7) in die Beschichtungszone bringbar ist.5. The device according to claim 2 to 4,
characterized,
that above the scoop roller (3) is arranged in the area of the gap between the scoop roller shell and the belt surface, which extends approximately over the width of the distribution channel (12), with the additional coating medium (11) from one of the containers (4, 7) into the Coating zone can be brought.
dadurch gekennzeichnet,
daß die Mantelfläche der Umlenkrolle (2) mit einem das Beschichtungsmedium abweisenden Werkstoff, insbesondere Keramik beschichtet ist.6. The device according to claim 2 to 5,
characterized,
that the outer surface of the deflection roller (2) is coated with a material that repels the coating medium, in particular ceramic.
dadurch gekennzeichnet,
daß der Umlenkrolle (4) in Bandtransportrichtung hinter dem Spalt zwischen Bandoberfläche und Schöpfrollenmantel in an sich bekannter Weise ein Düsenmesser (8) zur Steuerung der gewünschten Schichtdicke und/oder eine Vorrichtung zum Einbringen von Kristallisationskeimen (9) in die Schicht mittels eines Gasstromes vorgesehen ist.7. The device according to one or more of the preceding claims,
characterized,
that the deflecting roller (4) is provided in the belt transport direction behind the gap between the belt surface and scoop roller jacket in a manner known per se to provide a nozzle knife (8) for controlling the desired layer thickness and / or a device for introducing crystallization nuclei (9) into the layer by means of a gas stream .
dadurch gekennzeichnet,
daß die Vorrichtung unter Schutzgas betreibbar ist, wobei das Schutzgas gleichzeitig zur Kühlung des Bandes verwendbar ist.8. The device according to one or more of the preceding claims,
characterized,
that the device can be operated under protective gas, the protective gas being simultaneously usable for cooling the strip.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3009590 | 1980-03-13 | ||
| DE3009590A DE3009590B1 (en) | 1980-03-13 | 1980-03-13 | Method and device for one-sided coating of continuous strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0036098A1 true EP0036098A1 (en) | 1981-09-23 |
Family
ID=6097054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81101229A Withdrawn EP0036098A1 (en) | 1980-03-13 | 1981-02-20 | Process and apparatus for the single-faced coating of a continuous strip |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0036098A1 (en) |
| JP (1) | JPS56142861A (en) |
| DE (1) | DE3009590B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT500851B1 (en) * | 2005-02-25 | 2006-04-15 | Voestalpine Mechatronics Gmbh | Melt dip coating unit comprises a melt bath with guide rollers, a rotational speed measurement unit, and an evaluation circuit |
| DE102006050702A1 (en) * | 2006-10-24 | 2008-04-30 | Welser Profile Gmbh | Apparatus and method for removing a metal coating |
| CN103143481A (en) * | 2013-03-21 | 2013-06-12 | 无锡中易薄膜科技有限公司 | Novel safe and environment-friendly coating equipment |
| DE102014206839A1 (en) | 2014-04-09 | 2015-10-15 | Sms Group Gmbh | Method and device for coating a metal strip moving in the direction of travel of the strip as well as a device for producing elongated metallic products |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10145105B4 (en) * | 2001-09-13 | 2010-09-30 | Sms Siemag Aktiengesellschaft | Apparatus and method for metal coating steel strip |
| DE102006023283B3 (en) * | 2006-05-18 | 2007-11-08 | Wieland-Werke Ag | Coating arrangement for metal strips comprises a coating roller only partially immersed in a molten bath |
| JP5265165B2 (en) * | 2007-09-28 | 2013-08-14 | 富士フイルム株式会社 | Coating apparatus and ink jet recording apparatus using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3228788A (en) * | 1962-05-04 | 1966-01-11 | United States Steel Corp | Method and apparatus for galvanizing steel strip on one side |
| US3716019A (en) * | 1970-11-23 | 1973-02-13 | Inland Steel Co | Roller coating system for one side strip coating |
-
1980
- 1980-03-13 DE DE3009590A patent/DE3009590B1/en not_active Withdrawn
-
1981
- 1981-02-20 EP EP81101229A patent/EP0036098A1/en not_active Withdrawn
- 1981-03-13 JP JP3545181A patent/JPS56142861A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3228788A (en) * | 1962-05-04 | 1966-01-11 | United States Steel Corp | Method and apparatus for galvanizing steel strip on one side |
| US3716019A (en) * | 1970-11-23 | 1973-02-13 | Inland Steel Co | Roller coating system for one side strip coating |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT500851B1 (en) * | 2005-02-25 | 2006-04-15 | Voestalpine Mechatronics Gmbh | Melt dip coating unit comprises a melt bath with guide rollers, a rotational speed measurement unit, and an evaluation circuit |
| DE102006050702A1 (en) * | 2006-10-24 | 2008-04-30 | Welser Profile Gmbh | Apparatus and method for removing a metal coating |
| CN103143481A (en) * | 2013-03-21 | 2013-06-12 | 无锡中易薄膜科技有限公司 | Novel safe and environment-friendly coating equipment |
| DE102014206839A1 (en) | 2014-04-09 | 2015-10-15 | Sms Group Gmbh | Method and device for coating a metal strip moving in the direction of travel of the strip as well as a device for producing elongated metallic products |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3009590B1 (en) | 1981-03-12 |
| JPS56142861A (en) | 1981-11-07 |
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