EP0752485A1 - Apparatus for masking the edges of a metal strip suitable for a radial electroplating cell for preventing dendrites - Google Patents

Apparatus for masking the edges of a metal strip suitable for a radial electroplating cell for preventing dendrites Download PDF

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Publication number
EP0752485A1
EP0752485A1 EP96401348A EP96401348A EP0752485A1 EP 0752485 A1 EP0752485 A1 EP 0752485A1 EP 96401348 A EP96401348 A EP 96401348A EP 96401348 A EP96401348 A EP 96401348A EP 0752485 A1 EP0752485 A1 EP 0752485A1
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EP
European Patent Office
Prior art keywords
roller
mask
edges
strip
width
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96401348A
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German (de)
French (fr)
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EP0752485B1 (en
Inventor
Michel Decool
Alain Bello
Pierre Debusschere
Philippe Dulac
Georges Leleux
Robert Demarque
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Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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Publication of EP0752485A1 publication Critical patent/EP0752485A1/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/06—Wires; Strips; Foils
    • C25D7/0614—Strips or foils

Definitions

  • a radial type cell comprises a tank which contains the electroplating bath, a partially submerged strip support roller, submerged anodes arranged facing the roller at approximately constant distance, means for circulating an electric current between said anodes and a strip serving as a cathode, means for passing through the tank of the strip supported by said roller and means for circulating said bath in the space separating the anodes from the strip.
  • the tape support roller generally comprises an electrically insulating coating, generally rubberized; optionally, the surface of the central part of the roller is conductive, when the roller is used to supply electric current to the strip which serves as a cathode.
  • the object of the invention is to provide an edge masking device suitable for radial electroplating cells with soluble anodes and with strong hydrodynamic constraints, corresponding in particular to relative speeds between the strip to be coated and the electrolysis bath greater than 2 m. / s.
  • the subject of the invention is a device for masking the edges of a metal strip suitable for a plating cell of the radial type, comprising a support roller for said metal strip and soluble anodes arranged opposite said roller, said device comprising a shaped mask.
  • said mask comprises a semi insulating strip rigid, in particular in a composite material with a polymer matrix, having, on its internal face turned towards said roller, on the one hand on the internal side oriented towards the middle of said roller, a recess over its entire length, on the other hand on the external side opposite, pads of non-stick material, regularly spaced and fixed on said inner face and characterized in that, thanks to fixing means, said mask is applied against the surface of said roller via of said studs and positioned so that said edges are engaged in said recess.
  • the radial type electrodeposition cell supported by a frame (not shown), comprises a tank (not shown) which contains an electrodepositon bath, a roller 1 strip support partially immersed in the bath, anodes soluble 2 submerged disposed facing the roller 1, means not shown for circulating an electric current between the anodes 2 and the metal strip B to be coated and serving as cathode, scrolling means (not shown) in the tank of the strip B supported by the roller 1 and means for circulating said bath in the space separating the anodes 2 from the strip B.
  • These means for circulating the bath comprise injection ramps 3 placed at the point where the strip B in movement enters and leaves of the space separating the anodes 2 from the roller 1, a space which is generally called "gap”.
  • This masking device comprises two identical masks 4 in the form of narrow strips each arranged facing a bank 10 of the strip B in movement and supported at each end 5 by anchoring means 14 supported by fixing means 6.
  • the masks 4 mainly consist of a semi-rigid insulating strip 7, preferably made of a polymer matrix composite material; this composite material can for example be reinforced with glass fibers.
  • Each insulating strip 7 extends between the roll 1 and the anodes 2, over approximately a half-circumference of the roll 1.
  • the contact or sliding surface of the pads 9 on the roller 1 is located in the immediate vicinity of the edges 10 of the strip B in movement.
  • the studs 9 consist of plates of non-stick material, of TEFLON type, fixed for example by bonding to the internal face of the insulating strip 7 outside the detachment zone 8 (cf. FIG. 1B).
  • the total thickness of the mask 4 is approximately 8 mm.
  • a thickness of the mask of approximately 8 mm
  • the recess 8 extends almost over the entire length of the insulating strip 7.
  • the interval which separates the insulating strip 7 from the roll 1 corresponds to the depth of said recess in the strip 7 added to the thickness of the studs 9.
  • This interval must be much greater than the thickness of the strip B.
  • the depth of the step 8 in the strip 7 is approximately 2 mm; the interval which separates the insulating strip 7 from the roll 1 is then approximately 5 mm and the residual thickness of the insulating strip 7 at the recess 8 is approximately 3 mm.
  • the width of the step 8 must be much greater than that of the edges 10, that is to say of the portion of strip B on which it is sought to avoid the dendrites.
  • this edge width 10 to be protected is approximately 15 mm, the width of the step 8 is then approximately 30 mm.
  • the total width of the insulating strip 7 is at least equal to the sum of the width of the recess 8 and the width of the pads 9; for an offset width 8 of 30 mm, it can typically be around 120 mm.
  • the connecting rods 13 and 15 are extensible in the sense that their length can be adjusted; for example, they are made up of two tubes fitted one inside the other as shown in FIG. 4.
  • the connecting rods 13 and 15 are capable of sliding respectively along the bars 12 and 11 in order to properly position the masks 4 opposite the edges 10 of the strip B.
  • the anchoring means 14 supported by the ends of two connecting rods 13 as shown in FIG. 3 provide a safety function, which allows the mask 4 to be released from its fixing means 6, in the event of an accident, for example in the event of an accident. of attachment of the strip B while scrolling on said mask.
  • the anchoring means 14 comprise a cylinder 17 and a fastener 18.
  • the cylinder 17 is integral with the ends of the two connecting rods 13 and kept approximately parallel to the bars 11, 12; according to the invention, the cylinder 17 is split over its entire length by a slot 19 oriented towards the entrance to the gap separating the anodes 2 from the roller 1.
  • the fastener 18 passes through the slot 19 and has, at one end, clamping means for fixing the end 5 of the mask 4 and, at the other end, a prominent end piece embedded in the cylinder 17.
  • the thickness of the end piece is greater than the width of the slot 19 so that it cannot pass through said slot.
  • the fastener 18 remains secured to the cylinder 17 under the normal conditions of stress of the mask 4 on the fixing means 6, which are defined by the normal operating conditions of the cell.
  • the mechanical and geometrical characteristics of the cylinder 17 and of the end piece of the fastener 18 are determined in a manner known per se on the one hand to avoid the opening of the slot under the normal conditions of stress of the fastener 18 supporting the mask 4 when the cell is in operation, on the other hand to allow an opening of the slot 19 sufficient to allow passage the nozzle as soon as the stress on the fastener exceeds a predetermined threshold.
  • the end piece may be of square section as shown in FIG. 4.
  • the anchoring means 14 can also have a function of adjusting the position of the masks 4 relative to those of the edges 10 of the strip B in movement on the roller 1.
  • the cylinder 17 has a length much greater than the width of the mask 4; it is then possible to slide the fastener 18 inside the cylinder 17 over a stroke sufficient to effect said adjustment.
  • the metal strip B to be coated is for example a steel strip approximately 2 m wide and 0.4 mm thick.
  • the position of the masks 4 is adjusted opposite the edges 10 of the metal strip B to be coated, in particular by sliding the connecting rods 13 and 15 along the fixed bars 11 and 12.
  • the position of the masks 4 is adjusted so that the edges 10 on each side of the strip B are inserted into the recess 8 of the masks 4, as shown in FIG. 2.
  • this device can advantageously be used to precisely adjust the position of the masks.
  • this clearance can be of the order of 10mm on each side.
  • the tension of the masks 4 must not be too high, to limit friction with the surface of the roller 1; however, it should be sufficient to properly hold the masks 4 facing the edges 10 of the strip B.
  • zinc is deposited, in particular by passing the strip B through the cell using the scrolling means, by passing an electric current between the anodes 2 and the strip B serving as the cathode while circulating the electrolysis bath in the "gap", in particular thanks to the injection rails 3.
  • the hydrodynamic forces exerted on the masks 4 help to separate them from the roller 1 and to limit the friction of the masks 4 on the roller 1.
  • the deposits on the banks do not offer any under-thickness and have a morphology comparable to that of the deposits in the center of the strip.
  • the relative speed between the strip and the bath is greater than 2 m / s.
  • the Applicant attributes this surprising effect to the geometry of the masks 4, which, in particular thanks to the recess 8 and the intervals which separate the pads 9, allow free circulation of the electrolysis bath , even in directions other than that of the tape running.
  • the flexibility of the insulating strips 7 also contributes to the stability of the masks 4, since it is thanks to it that the masks 4 deviate slightly from the roller 1 during operation, which further facilitates the circulation of the bath and limits the friction of the masks 4 on the roller 1.
  • the masks 4 are both sufficiently rigid to be held facing the edges 10 and sufficiently flexible to assume a stable position slightly spaced from the surface of the roller 1.
  • Another supposed effect of the free circulation of the bath between the masks 4 and the edges 10 of the strip is to allow a deposit having approximately the same thickness and the same morphology as in the center of the strip.
  • the mask 4 in the event of an accident, for example in the event that the strip B is hooked while scrolling on one of the masks 4, the mask 4 is released from the fastening means 6: in fact, under the effect of the tension exerted on the mask 4 at the time of attachment, the fastener 18 emerges from the cylinder 17 by spreading the slot 19 to let its prominent tip pass.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Secondary Cells (AREA)

Abstract

A device is claimed for masking the edges of a metal strip (B) suitable for use in a radial electroplating cell. The cell includes a roller support (1) for the metal strip (B), and soluble anodes (2) arranged facing the roller (1). The device comprises: (i) a mask (4) in the form of a narrow strip arranged over the length of each edge in the immediate proximity of the surface of the roller (1); (ii) a means (14) for anchoring the two ends of the mask (4); and (iii) a means (6) for fixing (ii). The mask (4) consists of an insulating, semi-rigid strip, esp. of a composite material with a polymer matrix, presenting, on its inner face turned towards the roller (1), on the one part of the inner side oriented towards the middle of the roller (1), a disconnection over the whole of its length and on the other part of the opposite outer side, some contacts in an anti-adherent material, regularly spaced and fixed on the inner face. Due to the fixing means (6), the mask (4) is applied against the surface of the roller (1) by the intermediary of the contacts, and positioned such that the edges may be engaged in the disconnection. The total thickness of the mask (4) is less than half the distance separating the anodes (2) from the roller (1). The width of the disconnection is at least 50% of the width of the edges to be masked. The anchoring means (14) comprises a roll (17), with its axis approximately parallel to that of the roller (1), presenting a slot over its whole length, and integral with the fixing means (6) and a fastening crossing the slot, integral with one end of the mask and incorporating a projecting tip embedded in the roll. Its thickness is greater than the width of the slot. The projecting tip is able to slide inside and over the length of the roll in order to modify the position of the mask (4) w.r.t. the edges of the metal strip.

Description

L'invention concerne un dispositif pour la prévention de l'apparition de dendrites en rives de bandes métalliques au cours d'un revêtement électrolytique en continu desdites bandes dans des cellules de type radial.The invention relates to a device for preventing the appearance of dendrites on the edges of metal strips during a continuous electrolytic coating of said strips in cells of the radial type.

Une cellule de type radial comporte une cuve qui contient le bain d'électrodéposition, un rouleau support de bande partiellement immergé, des anodes immergées disposées face au rouleau à distance à peu près constante, des moyens pour faire circuler un courant électrique entre lesdites anodes et une bande servant de cathode, des moyens de défilement dans la cuve de la bande supportée par ledit rouleau et des moyens pour faire circuler ledit bain dans l'espace séparant les anodes de la bande.A radial type cell comprises a tank which contains the electroplating bath, a partially submerged strip support roller, submerged anodes arranged facing the roller at approximately constant distance, means for circulating an electric current between said anodes and a strip serving as a cathode, means for passing through the tank of the strip supported by said roller and means for circulating said bath in the space separating the anodes from the strip.

Pendant le fonctionnement de la cellule, la surface du bain est en équilibre avec l'atmosphère et on qualifie la cellule de "ouverte".During the operation of the cell, the surface of the bath is in equilibrium with the atmosphere and the cell is called "open".

Le rouleau support de bande comporte généralement un revêtement électriquement isolant, généralement caoutchouté ; éventuellement, la surface de la partie centrale du rouleau est conductrice, quand le rouleau sert à alimenter en courant électrique la bande qui sert de cathode.The tape support roller generally comprises an electrically insulating coating, generally rubberized; optionally, the surface of the central part of the roller is conductive, when the roller is used to supply electric current to the strip which serves as a cathode.

Dans les installations d'électrodéposition en continu, on sait que l'apparition de dendrites en rives des bandes à revêtir résulte de surintensités localisées le long desdites rives au cours du dépôt.In continuous electroplating installations, it is known that the appearance of dendrites on the edges of the strips to be coated results from overcurrents localized along said edges during deposition.

Pour limiter ces surintensités, il est connu d'interposer un masque électriquement isolant entre les rives de la bande en défilement et les anodes : il s'agit généralement de bandes étroites en matériau isolant disposées le long de chaque rive.To limit these overcurrents, it is known to interpose an electrically insulating mask between the edges of the moving strip and the anodes: these are generally narrow strips of insulating material placed along each edge.

Or la réalisation d'un tel masque pose de nombreux problèmes dans le cas de cellules radiales, comportant notamment des anodes solubles :

  • les deux masques en forme de bandes étroites doivent épouser la forme du rouleau qui supporte la bande, ce qui implique une forme en arc de cercle.
  • les deux masques de rives ne peuvent pas s'appuyer sur les anodes qui sont solubles et doivent pouvoir être interchangées.
  • il faut que l'on puisse facilement ajuster la position des masques de rives en fonction du format, c'est à dire de la largeur, des bandes métalliques à revêtir.
However, the production of such a mask poses numerous problems in the case of radial cells, comprising in particular soluble anodes:
  • the two masks in the form of narrow bands must follow the shape of the roller which supports the band, which implies an arc-shaped shape.
  • the two edge masks cannot rest on the anodes which are soluble and must be able to be interchanged.
  • it is necessary to be able to easily adjust the position of the edge masks as a function of the format, ie the width, of the metal strips to be coated.

D'autres problèmes sont encore plus difficiles à surmonter, notamment lorsque la vitesse relative entre la bande et le bain d'électrolyse est élevée, par exemple supérieure à 2 m/s :

  • les deux masques de rives doivent pouvoir résister en fonctionnement à des forces hydrodynamiques importantes, créées par le défilement de la bande et la circulation du bain d'électrolyse entre le rouleau et les anodes.
Other problems are even more difficult to overcome, in particular when the relative speed between the strip and the electrolysis bath is high, for example greater than 2 m / s:
  • the two edge masks must be able to withstand significant hydrodynamic forces in operation, created by the running of the strip and the circulation of the electrolysis bath between the roller and the anodes.

En effet, notamment dans les cellules "ouvertes", ces forces hydrodynamiques tendent à déplacer les masques dans une direction transversale au défilement de la bande métallique, de telle sorte qu'ils ne protègent plus les rives !

  • A l'inverse, si la position que prennent les deux masques en cours de fonctionnement permet un masquage efficace des rives, elle ne doit pas conduire à des sous-épaisseurs de dépôts en rive, ou à des dépôts en rive présentant une morphologie très différente de celle du dépôt au centre de la bande ;
  • il faut que, en cas d'arrachement accidentel d'un masque en cours de fonctionnement, on évite la rupture du masque et on puisse maintenir en marche l'installation d'électrodéposition.
Indeed, especially in "open" cells, these hydrodynamic forces tend to move the masks in a direction transverse to the movement of the metal strip, so that they no longer protect the edges!
  • Conversely, if the position taken by the two masks during operation allows effective masking of the edges, it must not lead to under-thicknesses of deposits on the bank, or to deposits on the bank having a very different morphology that of the deposit in the center of the strip;
  • it is necessary that, in the event of accidental tearing off of a mask during operation, the mask is prevented from breaking and the electroplating installation can be kept running.

L'invention a pour but un dispositif de masquage de rive adapté aux cellules radiales d'électrodéposition à anodes solubles et à des contraintes hydrodynamiques fortes, correspondant notamment à des vitesses relatives entre la bande à revêtir et le bain d'électrolyse supérieures à 2 m/s.The object of the invention is to provide an edge masking device suitable for radial electroplating cells with soluble anodes and with strong hydrodynamic constraints, corresponding in particular to relative speeds between the strip to be coated and the electrolysis bath greater than 2 m. / s.

L'invention a pour objet un dispositif de masquage de rives de bande métallique adapté à une cellule d'électrodéposition de type radial, comprenant un rouleau support pour ladite bande métallique et des anodes solubles disposées face audit rouleau, ledit dispositif comprenant un masque en forme de bande étroite disposé le long de chaque rive à proximité immédiate de la surface dudit rouleau, des moyens d'ancrage aux deux extrémités dudit masque et des moyens de fixation desdits moyens d'ancrage, caractérisé en ce que ledit masque comprend une bande isolante semi-rigide, notamment en matériau composite à matrice polymère, présentant, sur sa face interne tournée vers ledit rouleau, d'une part du côté intérieur orienté vers le milieu dudit rouleau, un décrochement sur toute sa longueur, d'autre part du côté extérieur opposé, des plots en matière anti-adhérante, régulièrement espacés et fixés sur ladite face interne et caractérisé en ce que, grâce aux moyens de fixation, ledit masque est appliqué contre la surface dudit rouleau par l'intermédiaire desdits plots et positionné de telle sorte que lesdites rives soient engagées dans ledit décrochement.The subject of the invention is a device for masking the edges of a metal strip suitable for a plating cell of the radial type, comprising a support roller for said metal strip and soluble anodes arranged opposite said roller, said device comprising a shaped mask. narrow strip arranged along each bank in the immediate vicinity of the surface of said roller, anchoring means at the two ends of said mask and means for fixing said anchoring means, characterized in that said mask comprises a semi insulating strip rigid, in particular in a composite material with a polymer matrix, having, on its internal face turned towards said roller, on the one hand on the internal side oriented towards the middle of said roller, a recess over its entire length, on the other hand on the external side opposite, pads of non-stick material, regularly spaced and fixed on said inner face and characterized in that, thanks to fixing means, said mask is applied against the surface of said roller via of said studs and positioned so that said edges are engaged in said recess.

L'invention peut également présenter une ou plusieurs des caractéristiques suivantes :

  • l'épaisseur totale dudit masque est inférieure à la moitié de la distance qui sépare lesdites anodes dudit rouleau.
  • la largeur dudit décrochement est au moins supérieure de 50% à la largeur desdites rives à masquer.
  • lesdits moyens d'ancrage comprennent un cylindre d'axe approximativement parallèle audit rouleau présentant une fente sur toute sa longueur et solidaire des moyens de fixation et une attache traversant ladite fente, solidaire d'une extrémité dudit masque et comportant un embout proéminent encastré dans ledit cylindre et d'épaisseur supérieure à la largeur de ladite fente.
  • ledit embout est susceptible de coulisser à l'intérieur et le long dudit cylindre pour modifier la position des masques par rapport aux rives.
The invention may also have one or more of the following characteristics:
  • the total thickness of said mask is less than half the distance which separates said anodes from said roller.
  • the width of said recess is at least 50% greater than the width of said banks to be masked.
  • said anchoring means comprise a cylinder with an axis approximately parallel to said roller having a slot over its entire length and integral with the fixing means and a fastener passing through said slot, integral with one end of said mask and comprising a prominent end piece embedded in said cylinder and of thickness greater than the width of said slot.
  • said tip is capable of sliding inside and along said cylinder to modify the position of the masks relative to the edges.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée à titre d'exemple, et en référence aux figures annexées sur lesquelles :

  • la figure 1 est une vue de côté d'une cellule radiale dotée d'un dispositif de masquage des rives selon l'invention ;
  • la figure 1B est une représentation agrandie d'une partie référencée 1B de la figure 1 ;
  • la figure 2 est une coupe partielle selon l'axe ll-ll de la figure 1 ;
  • la figure 3 est une vue de dessus des moyens de fixation et d'ancrage des masques du dispositif selon l'invention ;
  • la figure 4 est une coupe selon l'axe IV-IV de la figure 3.
The invention will be better understood on reading the description which follows, given by way of example, and with reference to the appended figures in which:
  • FIG. 1 is a side view of a radial cell provided with a device for masking the edges according to the invention;
  • FIG. 1B is an enlarged representation of a part referenced 1B in FIG. 1;
  • Figure 2 is a partial section along the axis II-II of Figure 1;
  • Figure 3 is a top view of the means for fixing and anchoring the masks of the device according to the invention;
  • FIG. 4 is a section along the axis IV-IV of FIG. 3.

En référence à la figure 1, la cellule d'électrodéposition de type radial, soutenue par un bâti non représenté, comporte une cuve non représentée qui contient un bain d'électrodépositon, un rouleau 1 support de bande partiellement immergé dans le bain, des anodes solubles 2 immergées disposées face au rouleau 1, des moyens non représentés pour faire circuler un courant électrique entre les anodes 2 et la bande métallique B à revêtir et servant de cathode, des moyens de défilement (non représentés) dans la cuve de la bande B supportée par le rouleau 1 et des moyens pour faire circuler ledit bain dans l'espace séparant les anodes 2 de la bande B.With reference to FIG. 1, the radial type electrodeposition cell, supported by a frame (not shown), comprises a tank (not shown) which contains an electrodepositon bath, a roller 1 strip support partially immersed in the bath, anodes soluble 2 submerged disposed facing the roller 1, means not shown for circulating an electric current between the anodes 2 and the metal strip B to be coated and serving as cathode, scrolling means (not shown) in the tank of the strip B supported by the roller 1 and means for circulating said bath in the space separating the anodes 2 from the strip B.

Ces moyens pour faire circuler le bain comportent des rampes d'injection 3 placées à l'endroit où la bande B en défilement entre et sort de l'espace séparant les anodes 2 du rouleau 1, espace qu'on appelle généralement "gap".These means for circulating the bath comprise injection ramps 3 placed at the point where the strip B in movement enters and leaves of the space separating the anodes 2 from the roller 1, a space which is generally called "gap".

Pour la prévention des dendrites en rives, la cellule d'électrodéposition comporte encore un dispositif de masquage des rives de la bande B en cours de défilement.For the prevention of dendrites on the edges, the electroplating cell also includes a device for masking the edges of the band B during scrolling.

Ce dispositif de masquage selon l'invention comporte deux masques identiques 4 en forme de bandes étroites disposés chacun face à une rive 10 de la bande B en défilement et supportés à chaque extrémité 5 par des moyens d'ancrage 14 soutenus par des moyens de fixation 6.This masking device according to the invention comprises two identical masks 4 in the form of narrow strips each arranged facing a bank 10 of the strip B in movement and supported at each end 5 by anchoring means 14 supported by fixing means 6.

En se référant à la figure 2, les masques 4 sont principalement constitués d'une bande isolante semi-rigide 7, de préférence en matériau composite à matrice polymère ; ce matériau composite peut être par exemple renforcé de fibres de verre.Referring to FIG. 2, the masks 4 mainly consist of a semi-rigid insulating strip 7, preferably made of a polymer matrix composite material; this composite material can for example be reinforced with glass fibers.

Chaque bande isolante 7 s'étend entre le rouleau 1 et les anodes 2, sur environ une demi-circonférence du rouleau 1.Each insulating strip 7 extends between the roll 1 and the anodes 2, over approximately a half-circumference of the roll 1.

Selon l'invention, le long de sa face interne orientée vers le rouleau 1, la bande isolante 7 comporte un décrochement 8 pratiqué sur le côté intérieur orienté vers le milieu du rouleau 1 et soutient, de l'autre côté extérieur, des plots 9 régulièrement espacés, comme représenté à la figure 1B.According to the invention, along its internal face oriented towards the roller 1, the insulating strip 7 has a recess 8 formed on the inner side oriented towards the middle of the roller 1 and supports, on the other outer side, studs 9 regularly spaced, as shown in Figure 1B.

Grâce aux moyens de fixation 6, les deux masques 4 sont appliqués contre la surface du rouleau 1 par l'intermédiaire des plots 9.Thanks to the fixing means 6, the two masks 4 are applied against the surface of the roller 1 by means of the studs 9.

La surface de contact ou de glissement des plots 9 sur le rouleau 1 est situé à proximité immédiate des rives 10 de la bande B en défilement.The contact or sliding surface of the pads 9 on the roller 1 is located in the immediate vicinity of the edges 10 of the strip B in movement.

Les plots 9 sont constitués de plaquettes en matériau anti-adhérant, de type TEFLON, fixées par exemple par collage sur la face interne de la bande isolante 7 en dehors de la zone de décrochement 8 (cf. figure 1B).The studs 9 consist of plates of non-stick material, of TEFLON type, fixed for example by bonding to the internal face of the insulating strip 7 outside the detachment zone 8 (cf. FIG. 1B).

L'épaisseur totale du masque 4, c'est à dire la somme de celle de la bande isolante 7 et des plots 9, est largement inférieure à celle du "gap" de la cellule.The total thickness of the mask 4, ie the sum of that of the insulating strip 7 and the studs 9, is much less than that of the "gap" of the cell.

Par exemple, lorsque l'épaisseur du "gap" vaut 35 mm environ, l'épaisseur totale de masque 4 est de environ 8 mm.For example, when the thickness of the "gap" is approximately 35 mm, the total thickness of the mask 4 is approximately 8 mm.

Pour une épaisseur du masque de 8 mm environ, on a par exemple une épaisseur de bande isolante 7 de 5 mm environ et une épaisseur de plot 9 de 3 mm environ.For a thickness of the mask of approximately 8 mm, there is for example a thickness of insulating strip 7 of approximately 5 mm and a thickness of pad 9 of approximately 3 mm.

En se référant à la figure 1, le décrochement 8 s'étend quasiment sur toute la longueur de la bande isolante 7.Referring to FIG. 1, the recess 8 extends almost over the entire length of the insulating strip 7.

En se référant à la figure 2, au niveau du décrochement 8, l'intervalle qui sépare la bande isolante 7 du rouleau 1, correspond à la profondeur dudit décrochement dans la bande 7 ajoutée à l'épaisseur des plots 9.Referring to FIG. 2, at the level of the recess 8, the interval which separates the insulating strip 7 from the roll 1, corresponds to the depth of said recess in the strip 7 added to the thickness of the studs 9.

Cet intervalle doit être largement supérieur à l'épaisseur de la bande B.This interval must be much greater than the thickness of the strip B.

A l'inverse, l'épaisseur résiduelle de la bande isolante 7 au niveau du décrochement 8 doit être suffisante pour assurer la fonction de masquage électrique entre les anodes 2 et les rives 10 de la bande B.Conversely, the residual thickness of the insulating strip 7 at the recess 8 must be sufficient to ensure the electrical masking function between the anodes 2 and the edges 10 of the strip B.

Cette épaisseur minimum nécessaire pour assurer la fonction de masquage peut être évaluée d'une manière connue en elle-même.This minimum thickness necessary to ensure the masking function can be evaluated in a manner known per se.

Ainsi, dans le cas d'une bande isolante 7 d'épaisseur 5 mm et de plots 9 d'épaisseur 3 mm, la profondeur du décrochement 8 dans la bande 7 est de 2 mm environ ; l'intervalle qui sépare la bande isolante 7 du rouleau 1 est alors de 5 mm environ et l'épaisseur résiduelle de la bande isolante 7 au niveau du décrochement 8 est de 3 mm environ.Thus, in the case of an insulating strip 7 of thickness 5 mm and of studs 9 of thickness 3 mm, the depth of the step 8 in the strip 7 is approximately 2 mm; the interval which separates the insulating strip 7 from the roll 1 is then approximately 5 mm and the residual thickness of the insulating strip 7 at the recess 8 is approximately 3 mm.

La largeur du décrochement 8 doit être largement supérieure à celle des rives 10, c'est à dire de la portion de bande B sur laquelle on cherche à éviter les dendrites.The width of the step 8 must be much greater than that of the edges 10, that is to say of the portion of strip B on which it is sought to avoid the dendrites.

Si cette largeur de rive 10 à protéger est de 15 mm environ, la largeur du décrochement 8 est alors de 30 mm environ.If this edge width 10 to be protected is approximately 15 mm, the width of the step 8 is then approximately 30 mm.

La largeur totale de la bande isolante 7 est au moins égale à la somme de la largeur du décrochement 8 et de la largeur des plots 9 ; pour une largeur de décrochement 8 de 30 mm, elle peut être typiquement de 120 mm environ.The total width of the insulating strip 7 is at least equal to the sum of the width of the recess 8 and the width of the pads 9; for an offset width 8 of 30 mm, it can typically be around 120 mm.

Les moyens de fixation 6 qui soutiennent les masques 4 par l'intermédiaire des moyens d'ancrage 14, assurent en outre les fonctions suivantes :

  • le réglage de la tension des masques 4 contre la surface du rouleau 1;
  • le réglage de la position des masques 4 par rapport à celles des rives 10 de la bande B en défilement sur le rouleau 1.
The fixing means 6 which support the masks 4 by means of the anchoring means 14, also provide the following functions:
  • adjusting the tension of the masks 4 against the surface of the roller 1;
  • adjusting the position of the masks 4 relative to those of the edges 10 of the strip B while scrolling on the roller 1.

Pour assurer les fonctions de réglage de tension et de position, les moyens de fixation 6 comportent, par exemple, comme représenté aux figures 3 et 4.

  • des barres transversales inférieure 12 et supérieure 11 solidaires du bâti de la cellule ; les barres 11, 12 sont toutes les deux approximativement parallèles à l'axe de rotation du cylindre 1 ; la barre supérieure 11 est plus proche du rouleau 1 que la barre inférieure 12.
  • deux bielles extensibles 13 articulées par une extrémité sur la barre inférieure 11 et soutenant par l'autre extrémité l'extrémité 5 du masque 4 par l'intermédiaire de moyens d'ancrage 14 ;
  • deux bielles extensibles 15 articulées par une extrémité sur la barre supérieure 11 et soutenant par l'autre extrémité chaque bielle 13 en un point d'articulation 16 situé approximativement au milieu de ladite bielle 13.
To ensure the tension and position adjustment functions, the fixing means 6 comprise, for example, as shown in FIGS. 3 and 4.
  • lower 12 and upper 11 transverse bars secured to the frame of the cell; the bars 11, 12 are both approximately parallel to the axis of rotation of the cylinder 1; the upper bar 11 is closer to the roller 1 than the lower bar 12.
  • two extendable connecting rods 13 articulated by one end on the lower bar 11 and supporting by the other end the end 5 of the mask 4 by means of anchoring means 14;
  • two extendable connecting rods 15 articulated by one end on the upper bar 11 and supporting by the other end each connecting rod 13 at a point of articulation 16 situated approximately in the middle of said connecting rod 13.

Les bielles 13 et 15 sont extensibles en ce sens qu'on peut régler leur longueur ; elles sont par exemple constituées de deux tubes emboîtés l'un dans l'autre tel que représenté à la figure 4.The connecting rods 13 and 15 are extensible in the sense that their length can be adjusted; for example, they are made up of two tubes fitted one inside the other as shown in FIG. 4.

Grâce au réglage de la longueur des bielles 13 et 15, on peut ainsi régler la tension de la bande isolante 7 contre la surface du rouleau 1.By adjusting the length of the connecting rods 13 and 15, it is thus possible to adjust the tension of the insulating strip 7 against the surface of the roller 1.

Les bielles 13 et 15 sont susceptibles de coulisser respectivement le long des barres 12 et 11 afin de mettre convenablement en position les masques 4 en face des rives 10 de la bande B.The connecting rods 13 and 15 are capable of sliding respectively along the bars 12 and 11 in order to properly position the masks 4 opposite the edges 10 of the strip B.

On peut prévoir d'autres moyens de fixation sans se départir de la présente invention.Other fixing means can be provided without departing from the present invention.

Les moyens d'ancrage 14 soutenus par les extrémités de deux bielles 13 comme représenté à la figure 3 assurent une fonction de sécurité, qui permet le dégagement du masque 4 de ses moyens de fixation 6, en cas d'accident, par exemple en cas d'accrochage de la bande B en défilement sur ledit masque.The anchoring means 14 supported by the ends of two connecting rods 13 as shown in FIG. 3 provide a safety function, which allows the mask 4 to be released from its fixing means 6, in the event of an accident, for example in the event of an accident. of attachment of the strip B while scrolling on said mask.

A cet effet, les moyens d'ancrage 14 comprennent un cylindre 17 et une attache 18.To this end, the anchoring means 14 comprise a cylinder 17 and a fastener 18.

Le cylindre 17 est solidaire des extrémités des deux bielles 13 et maintenu approximativement parallèle aux barres 11, 12 ; selon l'invention, le cylindre 17 est fendu sur toute sa longueur par une fente 19 orientée vers l'entrée de l'intervalle séparant les anodes 2 du rouleau 1.The cylinder 17 is integral with the ends of the two connecting rods 13 and kept approximately parallel to the bars 11, 12; according to the invention, the cylinder 17 is split over its entire length by a slot 19 oriented towards the entrance to the gap separating the anodes 2 from the roller 1.

L'attache 18 traverse la fente 19 et présente, à une extrémité, des moyens de serrage pour fixer l'extrémité 5 du masque 4 et, à l'autre extrémité, un embout proéminent encastré dans le cylindre 17.The fastener 18 passes through the slot 19 and has, at one end, clamping means for fixing the end 5 of the mask 4 and, at the other end, a prominent end piece embedded in the cylinder 17.

L'épaisseur de l'embout est supérieure à la largeur de la fente 19 pour ne pas pouvoir passer au travers de ladite la fente.The thickness of the end piece is greater than the width of the slot 19 so that it cannot pass through said slot.

Ainsi, l'attache 18 reste solidaire du cylindre 17 dans les conditions normales de sollicitation du masque 4 sur les moyens de fixation 6, qui sont définies par les conditions normales de fonctionnement de la cellule.Thus, the fastener 18 remains secured to the cylinder 17 under the normal conditions of stress of the mask 4 on the fixing means 6, which are defined by the normal operating conditions of the cell.

Les caractéristiques mécaniques et géométriques du cylindre 17 et de l'embout de l'attache 18 sont déterminées d'une manière connue en elle-même d'une part pour éviter l'ouverture de la fente dans les conditions normales de sollicitation de l'attache 18 soutenant le masque 4 lorsque la cellule est en fonctionnement, d'autre part pour permettre une ouverture de la fente 19 suffisante pour laisser passer l'embout dès que la sollicitation de l'attache dépasse un seuil prédéterminé.The mechanical and geometrical characteristics of the cylinder 17 and of the end piece of the fastener 18 are determined in a manner known per se on the one hand to avoid the opening of the slot under the normal conditions of stress of the fastener 18 supporting the mask 4 when the cell is in operation, on the other hand to allow an opening of the slot 19 sufficient to allow passage the nozzle as soon as the stress on the fastener exceeds a predetermined threshold.

L'embout peut être de section carrée tel que représenté à la figure 4.The end piece may be of square section as shown in FIG. 4.

Selon une variante de réalisation, les moyens d'ancrage 14 peuvent également avoir une fonction de réglage de la position des masques 4 par rapport à celles des rives 10 de la bande B en défilement sur le rouleau 1.According to an alternative embodiment, the anchoring means 14 can also have a function of adjusting the position of the masks 4 relative to those of the edges 10 of the strip B in movement on the roller 1.

Selon cette variante, le cylindre 17 présente une longueur très supérieure à la largeur du masque 4 ; on peut alors faire coulisser l'attache 18 à l'intérieur du cylindre 17 sur une course suffisante pour effectuer ledit réglage.According to this variant, the cylinder 17 has a length much greater than the width of the mask 4; it is then possible to slide the fastener 18 inside the cylinder 17 over a stroke sufficient to effect said adjustment.

Il est possible également de monter sur un axe fileté l'embout proéminent de l'attache 18 pour pouvoir régler avec précision la position de cette attache par rapport aux extrémités du cylindre 17.It is also possible to mount the protruding end piece of the fastener 18 on a threaded axis in order to be able to precisely adjust the position of this fastener relative to the ends of the cylinder 17.

On va maintenant décrire le fonctionnement d'une cellule radiale dotée d'un dispositif de masquage selon l'invention.We will now describe the operation of a radial cell provided with a masking device according to the invention.

La bande métallique B à revêtir est par exemple une bande d'acier de 2 m de large environ et de 0,4 mm d'épaisseur.The metal strip B to be coated is for example a steel strip approximately 2 m wide and 0.4 mm thick.

On souhaite par exemple effectuer un revêtement de zinc à partir d'anodes solubles en zinc et d'un bain d'électrolyse à base de chlorures.For example, it is desired to carry out a coating of zinc from soluble zinc anodes and from an electrolysis bath based on chlorides.

Dans la cellule de dépôt électrolytique, grâce aux moyens de fixation 6, on règle la position des masques 4 en face des rives 10 de la bande métallique B à revêtir, notamment en faisant coulisser les bielles 13 et 15 le long des barres fixes 11 et 12.In the electrolytic deposition cell, by means of the fixing means 6, the position of the masks 4 is adjusted opposite the edges 10 of the metal strip B to be coated, in particular by sliding the connecting rods 13 and 15 along the fixed bars 11 and 12.

Plus précisément, on règle la position des masques 4 de manière à ce que les rives 10 de chaque côté de la bande B soient insérées dans le décrochement 8 des masques 4, comme représenté à la figure 2.More precisely, the position of the masks 4 is adjusted so that the edges 10 on each side of the strip B are inserted into the recess 8 of the masks 4, as shown in FIG. 2.

Lorsque les moyens d'ancrage 14 sont réalisés selon la variante présentée ci-dessus, qui prévoit le coulissement de l'attache 18 dans le cylindre 17, on peut avantageusement utiliser ce dispositif pour régler précisément la position des masques.When the anchoring means 14 are made according to the variant presented above, which provides for the sliding of the fastener 18 in the cylinder 17, this device can advantageously be used to precisely adjust the position of the masks.

Entre le bord extrême de la bande B et le bord interne du décrochement 8, on prévoit de chaque côté un débattement suffisant pour limiter les risques d'accrochage de la bande B sur les masques 4, pendant le défilement.Between the extreme edge of the strip B and the internal edge of the recess 8, sufficient travel is provided on each side to limit the risks of the strip B catching on the masks 4, during scrolling.

Pour une largeur de bande de 2m environ, ce débattement peut être de l'ordre de 10 mm de chaque côté.For a strip width of around 2m, this clearance can be of the order of 10mm on each side.

Grâce aux bielles extensibles 13 et 15, on règle ensuite la tension des masques 4 contre la surface du rouleau 1.Thanks to the extendable connecting rods 13 and 15, the tension of the masks 4 is then adjusted against the surface of the roller 1.

En se référant aux figures 1B et 2, le masque 4 en position de fonctionnement est en contact avec la surface du rouleau 1 par l'intermédiaire des plots 9 ; pendant que la bande B défile, le rouleau 1 qui tourne glisse donc sur les plots 9, qui sont anti-adhérants.With reference to FIGS. 1B and 2, the mask 4 in the operating position is in contact with the surface of the roller 1 via the studs 9; while the strip B passes, the rotating roller 1 therefore slides on the pads 9, which are non-stick.

La tension des masques 4 ne doit pas être trop élevée, pour limiter les frictions avec la surface du rouleau 1 ; elle soit cependant être suffisante pour maintenir convenablement en place les masques 4 face aux rives 10 de la bande B.The tension of the masks 4 must not be too high, to limit friction with the surface of the roller 1; however, it should be sufficient to properly hold the masks 4 facing the edges 10 of the strip B.

D'une manière connue en elle-même, on procède au dépôt de zinc, notamment en faisant défiler la bande B dans la cellule grâce aux moyens de défilement, en faisant passer un courant électrique entre les anodes 2 et la bande B servant de cathode tout en faisant circuler le bain d'électrolyse dans le "gap", notamment grâce aux rampes d'injection 3.In a manner known in itself, zinc is deposited, in particular by passing the strip B through the cell using the scrolling means, by passing an electric current between the anodes 2 and the strip B serving as the cathode while circulating the electrolysis bath in the "gap", in particular thanks to the injection rails 3.

On peut être amené à affiner le réglage de la tension des masques 4, qui dépend également de la vitesse de défilement de la bande et de la vitesse de circulation de bain dans le "gap".It may be necessary to refine the adjustment of the tension of the masks 4, which also depends on the speed of travel of the strip and on the speed of circulation of the bath in the "gap".

Au cours du fonctionnement de la cellule, les forces hydrodynamiques qui s'exercent sur les masques 4 contribuent à les écarter du rouleau 1 et à limiter les frottements des masques 4 sur le rouleau 1.During the operation of the cell, the hydrodynamic forces exerted on the masks 4 help to separate them from the roller 1 and to limit the friction of the masks 4 on the roller 1.

Selon l'invention, on constate que malgré des vitesses élevées de défilement de bande et de circulation de bain dans le "gap", les masques 4 restent bien en place face aux rives 10 de la bande B, ce qui permet d'éviter l'apparition de dendrites en rives.According to the invention, it can be seen that despite the high speeds of strip travel and bath circulation in the "gap", the masks 4 remain in place facing the edges 10 of strip B, which makes it possible to avoid the appearance of dendrites on the banks.

Selon l'invention, on constate également que les dépôts en rives n'offrent pas de sous-épaisseur et présentent une morphologie comparable à celle des dépôts au centre de la bande.According to the invention, it is also found that the deposits on the banks do not offer any under-thickness and have a morphology comparable to that of the deposits in the center of the strip.

A titre indicatif, la vitesse relative entre la bande et le bain est supérieure à 2 m/s.As an indication, the relative speed between the strip and the bath is greater than 2 m / s.

Sans préjuger d'une explication complète des phénomènes en jeu, la Demanderesse attribue cet effet surprenant à la géométrie des masques 4, qui , grâce notamment au décrochement 8 et aux intervalles qui séparent les plots 9, permet une libre circulation du bain d'électrolyse, même dans des directions différentes de celle du défilement de la bande.Without prejudging a full explanation of the phenomena at play, the Applicant attributes this surprising effect to the geometry of the masks 4, which, in particular thanks to the recess 8 and the intervals which separate the pads 9, allow free circulation of the electrolysis bath , even in directions other than that of the tape running.

Comme la circulation du bain est peu entravée par les masques 4, les forces hydrodynamiques ne risquent plus de les déplacer hors de la zone des rives 10 de la bande, grâce aussi à la rigidité des bandes isolantes 7 ; les masques conservent alors toute leur efficacité.As the circulation of the bath is little impeded by the masks 4, the hydrodynamic forces no longer risk moving them out of the zone of the edges 10 of the strip, also thanks to the rigidity of the insulating strips 7; the masks then retain all their effectiveness.

A l'inverse, la souplesse des bandes isolantes 7 participe aussi à la stabilité des masques 4, puisque c'est grâce à elle que les masques 4 s'écartent légèrement du rouleau 1 en cours de fonctionnement, ce qui facilite encore la circulation du bain et limite le frottement des masques 4 sur le rouleau 1.Conversely, the flexibility of the insulating strips 7 also contributes to the stability of the masks 4, since it is thanks to it that the masks 4 deviate slightly from the roller 1 during operation, which further facilitates the circulation of the bath and limits the friction of the masks 4 on the roller 1.

Ainsi, comme les bandes isolantes 7 sont semi-rigides, notamment en matériau composite à matrice polymère, les masques 4 sont à la fois suffisamment rigides pour se maintenir face aux rives 10 et suffisamment souples pour prendre une position stable légèrement écartée de la surface du rouleau 1.Thus, as the insulating strips 7 are semi-rigid, in particular made of a composite material with a polymer matrix, the masks 4 are both sufficiently rigid to be held facing the edges 10 and sufficiently flexible to assume a stable position slightly spaced from the surface of the roller 1.

Un autre effet supposé de la libre circulation du bain entre les masques 4 et les rives 10 de la bande est de permettre un dépôt présentant approximativement la même épaisseur et la même morphologie qu'au centre de la bande.Another supposed effect of the free circulation of the bath between the masks 4 and the edges 10 of the strip is to allow a deposit having approximately the same thickness and the same morphology as in the center of the strip.

Selon l'invention, grâce aux moyens d'ancrage 14 (figure 4), en cas d'accident, par exemple en cas d'accrochage de la bande B en défilement sur l'un des masques 4, le masque 4 se dégage des moyens de fixation 6 : en effet, sous l'effet de la tension exercée sur le masque 4 au moment de l'accrochage, l'attache 18 se dégage du cylindre 17 en écartant la fente 19 pour laisser passer son embout proéminent.According to the invention, thanks to the anchoring means 14 (FIG. 4), in the event of an accident, for example in the event that the strip B is hooked while scrolling on one of the masks 4, the mask 4 is released from the fastening means 6: in fact, under the effect of the tension exerted on the mask 4 at the time of attachment, the fastener 18 emerges from the cylinder 17 by spreading the slot 19 to let its prominent tip pass.

Grâce à cette sécurité, on ne risque pas de rompre le masque 4, même en cas d'accident d'accrochage ; il est également possible de poursuivre le revêtement de la bande après le décrochage du masque, évidemment sans bénéficier du masquage de rive du côté où le masque s'est décroché.Thanks to this security, there is no risk of breaking the mask 4, even in the event of a collision accident; it is also possible to continue coating the strip after removing the mask, obviously without benefiting from the edge masking on the side where the mask has come off.

Claims (5)

Dispositif de masquage de rives (10) de bande métallique (B) adapté à une cellule d'électrodéposition de type radial, comprenant un rouleau support (1) pour ladite bande métallique et des anodes solubles (2) disposées face audit rouleau (1) , ledit dispositif comprenant un masque (4) en forme de bande étroite disposé le long de chaque rive (10) à proximité immédiate de la surface dudit rouleau (1), des moyens d'ancrage (14) aux deux extrémités dudit masque et des moyens de fixation (6) desdits moyens d'ancrage, caractérisé en ce que ledit masque (4) comprend une bande isolante semi-rigide (7), notamment en matériau composite à matrice polymère, présentant, sur sa face interne tournée vers ledit rouleau (1), d'une part du côté intérieur orienté vers le milieu dudit rouleau (1), un décrochement (8) sur toute sa longueur, d'autre part du côté extérieur opposé, des plots (9) en matière anti-adhérante, régulièrement espacés et fixés sur ladite face interne et caractérisé en ce que, grâce aux moyens de fixation (6), ledit masque (4) est appliqué contre la surface dudit rouleau (1) par l'intermédiaire desdits plots (9) et positionné de telle sorte que lesdites rives (10) soient engagées dans ledit décrochement (8).Edge masking device (10) of metal strip (B) suitable for a radial type electroplating cell, comprising a support roller (1) for said metal strip and soluble anodes (2) arranged opposite said roller (1) , said device comprising a mask (4) in the form of a narrow strip disposed along each bank (10) in the immediate vicinity of the surface of said roller (1), anchoring means (14) at the two ends of said mask and fixing means (6) of said anchoring means, characterized in that said mask (4) comprises a semi-rigid insulating strip (7), in particular made of composite material with a polymer matrix, having, on its internal face turned towards said roller (1), on the one hand on the inner side oriented towards the middle of said roller (1), a recess (8) over its entire length, on the other hand on the opposite outer side, studs (9) made of non-stick material , regularly spaced and fixed on said internal face e and characterized in that, thanks to the fixing means (6), said mask (4) is applied against the surface of said roller (1) by means of said studs (9) and positioned so that said edges (10 ) are engaged in said recess (8). Dispositif selon la revendication 1 caractérisé en ce que l'épaisseur totale dudit masque (4) est inférieure à la moitié de la distance qui sépare lesdites anodes (2) dudit rouleau (1).Device according to Claim 1, characterized in that the total thickness of the said mask (4) is less than half the distance which separates the said anodes (2) from the said roller (1). Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que la largeur dudit décrochement (8) est au moins supérieure de 50% à la largeur desdites rives (10) à masquer.Device according to any one of the preceding claims, characterized in that the width of said step (8) is at least 50% greater than the width of said edges (10) to be masked. Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que lesdits moyens d'ancrage (14) comprennent un cylindre (17) d'axe approximativement parallèle à l'axe dudit rouleau (1) présentant une fente (19) sur toute sa longueur et solidaire des moyens de fixation (6) et une attache (18) traversant ladite fente (19), solidaire d'une extrémité (5) dudit masque (4) et comportant un embout proéminent encastré dans ledit cylindre (17) et d'épaisseur supérieure à la largeur de ladite fente.Device according to any one of the preceding claims, characterized in that the said anchoring means (14) comprise a cylinder (17) with an axis approximately parallel to the axis of the said roller (1) having a slot (19) over its whole length and integral with the fixing means (6) and a fastener (18) passing through said slot (19), integral with one end (5) of said mask (4) and comprising a prominent end piece embedded in said cylinder (17) and d 'thickness greater than the width of said slot. Dispositif selon la revendication 4 caractérisé en ce que ledit embout est susceptible de coulisser à l'intérieur et le long dudit cylindre (17) pour modifier la position des masques (4) par rapport aux rives (10).Device according to Claim 4, characterized in that the said tip is capable of sliding inside and along the said cylinder (17) to modify the position of the masks (4) relative to the edges (10).
EP96401348A 1995-07-07 1996-06-20 Apparatus for masking the edges of a metal strip suitable for a radial electroplating cell for preventing dendrites Expired - Lifetime EP0752485B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9508202A FR2736364B1 (en) 1995-07-07 1995-07-07 METAL STRIP EDGE MASKING DEVICE ADAPTED TO A RADIAL TYPE ELECTRODEPOSITION CELL, FOR THE PREVENTION OF DENDRITES
FR9508202 1995-07-07

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EP0752485A1 true EP0752485A1 (en) 1997-01-08
EP0752485B1 EP0752485B1 (en) 1999-04-21

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AT (1) ATE179226T1 (en)
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO1998048083A2 (en) * 1997-04-18 1998-10-29 Circuit Foil S.A. Device for carrying out continuous electrolytic precipitation processes
CN1804146B (en) * 2004-12-27 2010-05-05 同和矿业株式会社 Plating device and plating method

Citations (1)

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Publication number Priority date Publication date Assignee Title
EP0261691A1 (en) * 1986-09-26 1988-03-30 Kawasaki Steel Corporation Plating cell with edge masks

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0261691A1 (en) * 1986-09-26 1988-03-30 Kawasaki Steel Corporation Plating cell with edge masks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998048083A2 (en) * 1997-04-18 1998-10-29 Circuit Foil S.A. Device for carrying out continuous electrolytic precipitation processes
WO1998048083A3 (en) * 1997-04-18 1999-02-11 Circuit Foil Sa Device for carrying out continuous electrolytic precipitation processes
US6306268B1 (en) 1997-04-18 2001-10-23 Circuit Foil, S.A. Of Luxemburg Device for carrying out continuous electrolytic precipitation
CN1804146B (en) * 2004-12-27 2010-05-05 同和矿业株式会社 Plating device and plating method

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DE69602130D1 (en) 1999-05-27
EP0752485B1 (en) 1999-04-21
FR2736364A1 (en) 1997-01-10
ATE179226T1 (en) 1999-05-15
FR2736364B1 (en) 1997-08-08

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