EP0298887B1 - Stromzuführungswalze zur kontinuierlichen elektrolytischen Plattierung von metallischen oder anderen stromleitenden Bändern - Google Patents

Stromzuführungswalze zur kontinuierlichen elektrolytischen Plattierung von metallischen oder anderen stromleitenden Bändern Download PDF

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Publication number
EP0298887B1
EP0298887B1 EP88440055A EP88440055A EP0298887B1 EP 0298887 B1 EP0298887 B1 EP 0298887B1 EP 88440055 A EP88440055 A EP 88440055A EP 88440055 A EP88440055 A EP 88440055A EP 0298887 B1 EP0298887 B1 EP 0298887B1
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EP
European Patent Office
Prior art keywords
conductive
zone
roller according
collar
electrolyte
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.)
Expired - Lifetime
Application number
EP88440055A
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English (en)
French (fr)
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EP0298887A1 (de
Inventor
Gilbert Bertrand
Gérard Collin
Pierre Gasperment
Gérard Cottet
Guy Dupoyet
Georges Michel
Jean-Marc Truchot
André Klein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sollac Te Puteaux En Stowe Woodward France Sa Te
Original Assignee
STOWE WOODWARD FRANCE SA
Sollac SA
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Application filed by STOWE WOODWARD FRANCE SA, Sollac SA filed Critical STOWE WOODWARD FRANCE SA
Priority to AT88440055T priority Critical patent/ATE71413T1/de
Publication of EP0298887A1 publication Critical patent/EP0298887A1/de
Application granted granted Critical
Publication of EP0298887B1 publication Critical patent/EP0298887B1/de
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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
    • 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
    • C25D7/0657—Conducting rolls

Definitions

  • the present invention is in the field of surface coating of metallurgical products or semi-finished products in strips and is aimed in particular at coatings applied to electrically conductive strips by electrolytic deposition, such as steel sheets for example.
  • the invention is particularly intended for the metallurgical industry and more specifically for circular devices, included in electrodeposition lines of the type, for example, "continuous electrogalvanizing", called conductive rollers, and known for example from documents US-A- 3483113 (in particular Figures 7, 8, 9) US-A-3,634,223 or EP-A 0089790.
  • These conductive rollers which play a cathode role, most often consist of at least one cylindrical conductive ferrule, generally made of stainless steel, mounted on a carbon steel body wider than the active area or areas of the at least one ferrules and through which the electric current passes.
  • This steel body is covered with a flexible polymeric substance, both elastic and insulating, on each side of the active zone or zones, this substance playing a role of eventual entrainment, sealing, electrical insulation and protection of the body against corrosion.
  • These rollers are partially immersed in an electrolyte, the temperature of which is generally substantially higher than ambient temperature.
  • the strip is partially wrapped around a conductive roller, the internal face which will not be coated being in contact on the one hand with the active area of the conductive ferrule in order to establish the electrical contact, and on the other hand with the elastic insulating substance in order to ensure the tightness of the contact device.
  • the sealing rings are sometimes mounted on a hard insulating bandage (see fig. 7 of document US-A-3483113).
  • the purpose of the present invention is to significantly reduce these drawbacks while ensuring the vital functions of sealing, electrical insulation, protection of the roller body against corrosion and possible entrainment.
  • the invention also aims to improve the coatings applied to the strips, as well as the energy efficiency of the installation, and to reduce the maintenance costs and the frequency of plant shutdowns.
  • At least one intermediate ring is interposed between the active conductive area constituted by the ferrule and the area coated with the elastic and insulating substance, this ring being made of a polymer whose coefficient of dilation, flexibility or changes by swelling following absorption or chemical combination with the electrolyte, have values intermediate between those of the material constituting the conductive active area and those of the material of said coated area.
  • the flexible or sealing elastomer or polymer coating as well as its optional adhesive are not in direct contact with the lateral edges of the active zone (s) of the conductive shell (s), but it is provided to insert between the elastomer or the flexible or sealing polymer and the lateral edges of the active zone (s) of the conductive shell (s) one or more polymers, which will be called in the remainder of this text: "intermediate polymers” , put in the form of juxtaposed rings with or without partial superimposition, whose expansion coefficients, flexibility or the risks of swelling by absorption or by chemical combination with the electrolyte, or two or three of these parameters at the same time, are intermediate between those, very weak, of stainless steel (generally used for the shell) and those of the elastomer or of the flexible or sealing polymer.
  • this intermediate polymers of the sulfur rubber type (natural or nitrile) hardened commonly called ebonite in the profession or epoxy resins, or any other polymer with relatively closed crosslinking system, resistant to acids and low coefficient of expansion, high hardness of this or these intermediate polymers not being a handicap taking into account the particular geometry of the coating provided for in the invention.
  • a fiber reinforcement (which may for example be: metallic, glass, textile, or synthetic) which radially blocks the intermediate polymer or polymers and limits the variations radial dimension of this part of the intermediate polymer coating, and which can play, in the case of conductive fibers, a possible advantageous role of degressive conduction of electricity from the edge of the active conductive area of the ferrule concerned.
  • FIG. 1 shows the rotary plating roller 1, partially submerged in an electrolyte 5.
  • FIG. 2 shows the active area 3 of the conductive shell, surrounded by the area 4 coated with an elastic and insulating substance.
  • the strip 2 is partially wrapped around the conductive roller 1, the face that one does not want to cover during this passage being brought into contact with the active area 3 of the shell conductive in order to establish electrical contact, and also being brought into contact with the elastic and insulating substance 4 in order to ensure the tightness of the contact device.
  • the elastic and insulating coating according to the invention consists of two different polymers, although in intimate or sealed lateral contact with each other.
  • the polymer 41 fulfills the functions of sealing, elasticity, entrainment, and electrical insulation whereas the polymer 42, called here intermediate polymer, must only fulfill the functions of sealing and electrical insulation. This therefore allows the choice of harder polymers, with a more closed reticular structure and whose expansion or swelling characteristics are much more acceptable with regard to steel than are those of the types of polymers which one can choose as polymer 41.
  • This intermediate polymer 42 must be adhered perfectly with the lateral end face 3a of the active area 3 of the conductive ferrule and must of course be adhered correctly with the body 1 and with the polymer 41.
  • intermediate polymer 42 we have already defined what we can choose as intermediate polymer 42; as regards polymer 41, one can choose either a polyurethane or a Hypalon (from Du Pont de Nemours), or even more advantageously, the compound VARIOLASTIC (from the company SW INDUSTRIES, located at Southborough Technology Park, 333 Turnpike Road , SOUTHBOROUGH, MA 01772, USA).
  • a polyurethane or a Hypalon from Du Pont de Nemours
  • VARIOLASTIC from the company SW INDUSTRIES, located at Southborough Technology Park, 333 Turnpike Road , SOUTHBOROUGH, MA 01772, USA.
  • FIG. 5 represents another arrangement of the invention according to which the polymer 42 is also used as a sub-layer 42a of the polymer 41 which makes it possible to increase the seal of the assembly.
  • FIG. 6 shows a particular geometry of the polymer coatings 43 and 41 in that their connecting face is inclined in order to make the passage from one zone to the other even more gradual in terms of expansion or swelling.
  • the intermediate polymer 43 here in inclined connection with the polymer 41, also serves as an underlayer 43a.
  • two intermediate polymers 42 and 44 are seen, chosen so that their physicochemical characteristics ensure good progressiveness between the characteristics of the stainless steel used for the conductive shell and those of the elastic and insulating polymer. 41.
  • these polymers 42 and 44 are doped with conductive elements, such as conductive particles of the powder or metallic or carbon fibers in order to ensure the progressiveness of the diffusion of the electric current in the strip from the edge 3a of the conductive ferrule, which avoids resorting to very delicate machining of the edges of conductive ferrules and which makes it possible to 'be perfectly master of the diffusion of electric current.
  • the flexible or sealing polymer may itself be partially doped with electrically conductive elements.
  • the second intermediate polymer 45 serves as a partial sublayer 45a for the polymer 41.
  • FIG. 10 represents an intermediate polymer 42 of the type of that shown in FIG. 2 but comprising a frame 7 of natural or synthetic fibers.
  • This armature then plays the very interesting role of a mechanical clamping on the one hand, which limits the dimensional radial variations and the no less interesting role, if it is conductive, of vector of progressive electric diffusion on the other hand.
  • the reinforced intermediate polymer can also serve as a sub-layer and be the subject of variants of FIGS. 5 to 7.
  • all or part of an intermediate ring is housed under an edge flange of the active conductive area.
  • the conductive ferrule 3 has an edge 3b with a progressive profile as described in document US-A-3634223, and the intermediate polymer 42 comes to fill the entire "hollowed out” part of this ferrule end.
  • the advantage of this harder, more inert intermediate polymer 42 than polymer 41 is even more evident here because in conventional solutions, the slightest swelling of the elastomer causes this wing to lift. edge immediately deteriorating the quality of the electrical strip contact on the conductive ferrule.
  • the invention described here makes it possible to guarantee the straightness of the entire external generator of the active surface of the conductive ferrule 3 by producing, thanks to the intermediate polymer 42, a real blocking of the end wing of the conductive ferrule.
  • FIGS. 12 to 15 Variants of the invention appear in FIGS. 12 to 15 with an undercoat for the polymer 41 and / or therefore progressive inclined contact between the polymers 42 and 41.
  • any width can be given to the areas filled with the intermediate polymers as long as the contact of the strip on the polymer 41 remains sufficient to ensure the functions of sealing, insulation, d elasticity and possible entrainment by adhesion.
  • the number of intermediate polymers is not limiting.
  • this invention applies particularly well to the continuous electrogalvanizing industry, but it is obvious that it can be applied wherever it is desired to carry out a continuous coating by electrodeposition.

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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)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Windings For Motors And Generators (AREA)
  • Prevention Of Electric Corrosion (AREA)

Claims (10)

1. Stromzuführungswalze zum teilweisen Eintauchen in einen Elektrolyten (5) in einer kontinuierlichen Elektroplattierungslinie für Bänder (2), welche an ihrem Umfange mindestens eine aktive stromleitende mittlere Zone (3) und wenigstens eine äussere Zone (41) an jedem Ende aufweist, die mit einem biegsamen Material zum Sichern der Dichtheit der Kontaktfläche zwischen dem Band (2) und der aktiven leitenden Zone (3) gegenüber dem Elektrolyten bedeckt ist, welche Walze dadurch gekennzeichnet ist, dass mindestens ein Zwischenring (42, 43, 44, 45) zwischen die aktive leitende Zone (3) und die überdeckte Zone (41) geschaltet ist, welcher Ring aus einem Polymer besteht, dessen Ausdehnungskoeffizient, Biegsamkeit bzw. Bewegungen durch Aufweitung infolge Absorption oder chemische Bindung mit dem Elektrolyten Werte besitzen, die zwischen jenen des die aktive leitende Zone (3) bildenden Materiales und denen des die überdeckte Zone (41) bildenden Materiales liegen.
2. Walze nach Anspruch 1, dadurch gekennzeichnet, dass das zum Bilden des Zwischenringes (42) verwendete Polymer mit natürlichen oder synthetischen Fasern mit isolierenden Eigenschaften verstärkt ist.
3. Walze nach Anspruch 1, dadurch gekennzeichnet, dass das zum Bilden des Zwischenringes (42) verwendete Polymer mit natürlichen oder synthetischen Fasern mit elektrisch leitenden Eigenschaften verstärkt ist.
4. Walze nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das zum Bilden des Zwischenringes verwendete Polymer mit leitenden Elementen gedopt ist.
5. Walze nach Anspruch 1, dadurch gekennzeichnet, dass das biegsame Material der überdeckten Zone (41) teilweise mit leitenden Elementen gedopt ist.
6. Walze nach Anspruch 1 oder 5, dadurch gekennzeichnet, dass der Zwischenring (42, 43, 45) eine Unterlage (42a, 43a, 45a) für das Material der überdeckten Zone (41) bildet.
7. Walze nach Anspruch 1, dadurch gekennzeichnet, dass der Zwischenring (42, 43) zumindest teilweise unter einem Randflansch (3b) der aktiven leitenden Zone (3) zu liegen kommt.
8. Walze nach Anspruch 1, dadurch gekennzeichnet, dass der Zwischenring (42, 43) eine bezüglich einer zur Drehachse der Stromzuführungswalze (1) senkrechten Ebene geneigte Verbindungsfläche aufweist.
9. Walze nach Anspruch 1, dadurch gekennzeichnet, dass sie zwei aneinanderliegende Zwischenringe (42, 44) aus Polymeren unterschiedlicher physikalisch-chemischer Eigenschaften aufweist, wobei die Ausdehnungs- bzw. Biegsamkeits- bzw. Aufweitungseigenschaften durch Absorption oder chemische Bindung mit dem Elektrolyten dieser unterschiedlichen Polymere von Ring zu Ring progressive Werte besitzen, die von,jenen der aktiven leitenden Zone (3) zu jenen der überdeckten Zone (41) übergehen.
10. Walze nach Anspruch 1, dadurch gekennzeichnet, dass das biegsame Material der äusseren Zone (41) mit einem Klebstoff bedeckt ist.
EP88440055A 1987-07-07 1988-07-04 Stromzuführungswalze zur kontinuierlichen elektrolytischen Plattierung von metallischen oder anderen stromleitenden Bändern Expired - Lifetime EP0298887B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88440055T ATE71413T1 (de) 1987-07-07 1988-07-04 Stromzufuehrungswalze zur kontinuierlichen elektrolytischen plattierung von metallischen oder anderen stromleitenden baendern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8709651A FR2617869B1 (fr) 1987-07-07 1987-07-07 Rouleau conducteur rotatif pour le depot electrolytique en continu sur des feuillards metalliques ou autres feuillards electroconducteurs
FR8709651 1987-07-07

Publications (2)

Publication Number Publication Date
EP0298887A1 EP0298887A1 (de) 1989-01-11
EP0298887B1 true EP0298887B1 (de) 1992-01-08

Family

ID=9352965

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Application Number Title Priority Date Filing Date
EP88440055A Expired - Lifetime EP0298887B1 (de) 1987-07-07 1988-07-04 Stromzuführungswalze zur kontinuierlichen elektrolytischen Plattierung von metallischen oder anderen stromleitenden Bändern

Country Status (12)

Country Link
US (1) US4849083A (de)
EP (1) EP0298887B1 (de)
JP (1) JPH0768636B2 (de)
KR (1) KR950013596B1 (de)
AT (1) ATE71413T1 (de)
BR (1) BR8803359A (de)
CA (1) CA1321165C (de)
DE (1) DE3867550D1 (de)
ES (1) ES2029726T3 (de)
FR (1) FR2617869B1 (de)
GR (1) GR3004293T3 (de)
SU (1) SU1722236A3 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5069762A (en) * 1991-01-18 1991-12-03 Usx Corporation Appartaus for improved current transfer in radial cell electroplating
KR100373677B1 (ko) * 1998-09-16 2003-05-09 주식회사 포스코 전기도금용전도롤
DE10019720A1 (de) * 2000-04-20 2001-10-31 Atotech Deutschland Gmbh Verfahren und Vorrichtung zum elektrischen Kontaktieren von plattenförmigem Behandlungsgut bei elektrolytischen Prozessen
KR20020001079A (ko) * 2000-06-24 2002-01-09 이구택 컨덕터롤 밴드마크 방지장치
EP1303650A4 (de) * 2000-07-24 2006-08-23 Po Hang Iron & Steel Verfahren zur reduzierung von bandmarken eines elektropattierten stahlbleches
KR100460667B1 (ko) * 2000-11-22 2004-12-09 주식회사 포스코 러버부의 박리가 방지되는 강판 전기도금용 콘턱터롤
US20060243593A1 (en) * 2005-04-29 2006-11-02 Bowman Kenneth A Apparatus and method for improving contact between a web and a roll
FR2919511B1 (fr) * 2007-07-30 2010-01-29 Snecma Propulsion Solide Rouleau composite thermostructural
CN109652793A (zh) * 2019-03-04 2019-04-19 厦门佰事兴新材料科技有限公司 一种鼠笼式银导电辊的导电条的加工方法
CN113757382B (zh) * 2021-09-09 2022-04-01 广东嘉元科技股份有限公司 一种阴极辊专用在线防氧化装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483113A (en) * 1966-02-11 1969-12-09 United States Steel Corp Apparatus for continuously electroplating a metallic strip
US3634223A (en) * 1970-02-25 1972-01-11 United States Steel Corp Contact assembly
US4415425A (en) * 1982-03-15 1983-11-15 United States Steel Corporation Conductor roll contour
JPS6046395A (ja) * 1983-08-23 1985-03-13 Kobe Steel Ltd 電気めっき用コンダクタ−ロ−ル
JPS60181375U (ja) * 1984-05-11 1985-12-02 川崎製鉄株式会社 鋼帯電気めつきラインの通電ロ−ル

Also Published As

Publication number Publication date
EP0298887A1 (de) 1989-01-11
DE3867550D1 (de) 1992-02-20
JPH0768636B2 (ja) 1995-07-26
SU1722236A3 (ru) 1992-03-23
GR3004293T3 (de) 1993-03-31
CA1321165C (fr) 1993-08-10
ATE71413T1 (de) 1992-01-15
KR890002446A (ko) 1989-04-10
FR2617869A1 (fr) 1989-01-13
ES2029726T3 (es) 1992-09-01
FR2617869B1 (fr) 1989-12-15
KR950013596B1 (ko) 1995-11-13
US4849083A (en) 1989-07-18
BR8803359A (pt) 1989-01-31
JPH01127694A (ja) 1989-05-19

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