EP0694090A1 - Procede et dispositif de depot electrolytique d'un revetement superficiel de pieces - Google Patents

Procede et dispositif de depot electrolytique d'un revetement superficiel de pieces

Info

Publication number
EP0694090A1
EP0694090A1 EP94905645A EP94905645A EP0694090A1 EP 0694090 A1 EP0694090 A1 EP 0694090A1 EP 94905645 A EP94905645 A EP 94905645A EP 94905645 A EP94905645 A EP 94905645A EP 0694090 A1 EP0694090 A1 EP 0694090A1
Authority
EP
European Patent Office
Prior art keywords
electrolyte
anode
electrolysis
sludge
conveyed
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
EP94905645A
Other languages
German (de)
English (en)
Other versions
EP0694090B1 (fr
Inventor
Rudolf Kamm
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.)
Ecograph AG
Original Assignee
Ecograph AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ecograph AG filed Critical Ecograph AG
Priority to AT94905645T priority Critical patent/ATE152191T1/de
Publication of EP0694090A1 publication Critical patent/EP0694090A1/fr
Application granted granted Critical
Publication of EP0694090B1 publication Critical patent/EP0694090B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/08—Electroplating with moving electrolyte e.g. jet electroplating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/06—Filtering particles other than ions

Definitions

  • the invention described here relates to a method and a device for the electrolytic surface coating of objects conducting electrical current, in particular metal workpieces, and a special use of the device mentioned.
  • Electrolytic surface coatings of metallic objects have long been part of the known prior art; The technology mentioned is widely represented in the patent literature.
  • EP-A 0 196 420 (publication date October 8, 1986) teaches a high-speed electrolysis cell for the surface coating of strip-like material.
  • Said device comprises a vertical electrolytic galvanizing cell for coating steel strips, in which the strip is guided from an upper deflection or current roller to a lower deflecting immersion roller and from there to a further, upper deflection or current roller. there is applied to the device to be coated ascending and descending strip section in a gap between vertically positioned anodes of the ge 1500 ⁇ in circulation th Eletrolytstrom at high speed against the tape ⁇ .
  • the circulation of large amounts of electrolyte is achieved using the lowest possible pump energy.
  • the electrolysis cell described therein is specified by a plurality of current feeds and a plurality of electrolyte feeds or discharges. This ensures uniform electrolysis and coating.
  • the device from DE-A 34 29890 is used to apply a copper layer to a gravure cylinder in a galvanizing bath, which has a copper-containing electrolyte and at least one anode body made of copper.
  • the anode body can have the shape of a plate provided with a plurality of openings, especially that of a perforated or expanded metal plate concentrically arranged around the pressure cylinder. This arrangement allows the electrolysis to be carried out under a relatively low voltage and an even copper layer to be applied to the cathodically connected intaglio cylinder.
  • the method according to the invention for the electrolytic surface coating of electrically conductive, in particular metal workpieces, by means of a fluid electrolyte is characterized in that - That the electrolyte is conveyed in a controlled circulation in and around the electrolysis zone between the anode and the cathodically connected workpiece, the electrolyte for the most part at a high throughput rate, possibly under a higher inlet pressure, through the space between the cathodically connected workpiece and the anode and, to a lesser extent, with a lower throughput rate on the rear side of the anode facing away from the cathode,
  • anode sludge being separated or separated from the electrolyte in the overflow tank and / or in the return device.
  • the electrolyte is brought up to the anode, through the anode or is removed from the anode in such a way that the major part of the anode sludge which forms during the electrolysis is carried away by the flowing electrolyte.
  • the electrolyte on the circulation is continuously checked with regard to the essential process parameters such as temperature, conversion, contents, etc. and, if necessary, optimized.
  • the cathodically connected workpiece is either fixed or it is moved, in particular rotated, during the electrolytic surface coating; the anode is either replaced periodically or the anode material is continuously updated.
  • the anode sludge is separated or separated from the electrolyte during its passage through the overflow tank either by settling and / or by electrodes, and / or the sludge particles are retained on a filter connected to the return conveyor.
  • the device according to the invention for the electrolytic surface coating of electrical conductors for the electrolytic surface coating of electrical conductors, in particular
  • the supply lines or openings for the electrolyte into the anode zone are particularly suitable, as their number, arrangement and throughput can be varied and optimized.
  • Either the bottom of the overflow container is designed as a settling cone with an emptying device - which settling cone can also have deflection plates and / or separating electrodes to improve the degree of separation - and / or it is in the line of the Return conveyor in the flow direction in front of the conveyor unit provided a filter that is cleaned continuously or periodically.
  • the cathodically connected object can either be fixed or movable, in particular rotatable, partially or completely immersed in the electrolyte located in the electrolysis container and
  • the anode or the anode parts can also be immersed - likewise in the electrolyte - and optimally arranged with respect to their position in relation to the cathodically switched object.
  • the cathodically connected object can be a pressure cylinder for gravure printing, which is partially immersed in the electrolyte and is fixed or rotatable; the anode parts are then bowl-shaped and at a short distance from the pressure cylinder, the parts being porous or perforated.
  • the supply lines or openings for the electrolyte to the electrolysis zone are those which, in terms of quantity, distribution, direction and speed, allow a technically sufficiently precisely controlled supply of the electrolyte to the zone mentioned.
  • the device according to the invention is used primarily for the production of gravure printing cylinders with a material structure of the surface coating that is free of foreign matter (especially sludge) and therefore finely crystalline, homogeneous and also corrosion-resistant.
  • FIG. 2 shows a corresponding device shown analogously with the overflow container arranged below the electrolysis tank.
  • the electrolysis container 1.01 with the electrolyte bath 1.02 is arranged centrally; of course, the actual dimensions of this container correspond to those of the workpiece to be coated.
  • the anode or the anode parts 1.03 are set up in accordance with the cathodically connected workpiece 1.04.
  • the electrolyte is brought to the corresponding outlet openings 1.06a, 1.06b and 1.07a, 1.07b by means of the two feed lines 1.05a, 1.05b.
  • the two outlet openings 1.07a, 1.07b are designed and directed in such a way that a large part of the electrolyte conveyed reaches the space below between the anode parts 1.03 and the cathodically connected workpiece 1.04 and from there upwards and partly through the anode parts - flows: This is indicated in the figure by the arrows. A smaller part of the electrolyte exits into the electrolyte bath at the openings 1.06a, 1.06 and from there moves upwards on the side of the anode facing away from the cathode.
  • the anode sludge emerges from the electrolysis tank into the overflow tanks 1.08a, 1.08b arranged next to the said tank. If the electrolyte tank 1.02 is a longer tub, the two connected overflow tanks 1.08a, 1.08b are narrow side tubs. From the barrel containers 1.08a, 1.08b the liquid electrolyte runs through the lines 1.09a, 1.09b to the delivery units 1.10a, 1.10b, which the medium via the filters 1.11a, 1.11b again through the lines 1.05a, 1.05b the above the described outlet openings.
  • the two overflow containers 1.08a, 1.08b (they can together form a circulating, closed collecting container) can have individual or a coherent settling cone 1.12a, 1.12b with a corresponding drain line at the bottom.
  • FIG. 2 shows the corresponding device with the overflow container 2.08 arranged under the electrolysis container 2.01.
  • the latter container also has a settling cylinder 2.12 with an emptying line.

Landscapes

  • 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)

Abstract

Selon le procédé nouveau et avantageux de dépôt électrolytique d'un revêtement superficiel de pièces spéciales métalliques, il est important que l'électrolyte circule dans un circuit contrôlé pour parvenir dans la zone d'électrolyse et au voisinage de celle-ci, ledit électrolyte circulant, pour la majeure partie, à un débit élevé, éventuellement sous une pression d'entrée élevée, à travers l'espace compris entre la pièce connectée cathodiquement et l'anode et, pour une faible partie, à un débit plus faible, vers la partie arrière de l'anode, opposée à la cathode. Après avoir quitté la zone d'électrolyse, l'électrolyte est envoyé dans un réservoir à trop-plein séparé, d'où il circule de nouveau dans la zone d'électrolyse et au voisinage de celle-ci, entre l'anode et la cathode. Des boues anodiques se séparent de l'électrolyte dans le réservoir à trop-plein et/ou dans le dispositif de réalimentation. Le dispositif pour la mise en oeuvre de ce procédé comprend le bac d'électrolyse proprement dit (1.01), des conduits d'alimentation (1.05) ou des ouvertures d'alimentation (1.06, 1.07) en électrolyte, situés à la base de la chambre, entre la pièce connectée cathodiquement (1.04) et l'anode (1.03) ou, éventuellement, au-dessous, derrière l'anode, au moins un réservoir à trop-plein (1.08) raccordé au bac d'électrolyse ou au-dessous de ce bac, dans lequel l'électrolyte est envoyé après avoir traversé la zone d'électrolyse, ainsi qu'un dispositif de retour d'électrolyte, équipé d'un filtre (1.11).
EP94905645A 1994-02-15 1994-02-15 Procede et dispositif de depot electrolytique d'un revetement superficiel de pieces Expired - Lifetime EP0694090B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT94905645T ATE152191T1 (de) 1994-02-15 1994-02-15 Verfahren und vorrichtung zur elektrolytischen oberflächenbeschichtung von werkstücken

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1994/000031 WO1995021952A1 (fr) 1994-02-15 1994-02-15 Procede et dispositif de depot electrolytique d'un revetement superficiel de pieces

Publications (2)

Publication Number Publication Date
EP0694090A1 true EP0694090A1 (fr) 1996-01-31
EP0694090B1 EP0694090B1 (fr) 1997-04-23

Family

ID=4549341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94905645A Expired - Lifetime EP0694090B1 (fr) 1994-02-15 1994-02-15 Procede et dispositif de depot electrolytique d'un revetement superficiel de pieces

Country Status (5)

Country Link
US (1) US5716509A (fr)
EP (1) EP0694090B1 (fr)
AU (1) AU5968594A (fr)
DE (1) DE59402538D1 (fr)
WO (1) WO1995021952A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324805A (en) * 1997-04-30 1998-11-04 Platt Electromeck Limited Electroplating
DE19839479A1 (de) * 1998-08-29 2000-03-02 Schaeffler Waelzlager Ohg Verfahren zur chemischen oder elektrochemischen Behandlung eines rotationssymmetrischen Hohlkörpers und zugehörige Halte- und Drehvorrichtung
AT411906B (de) * 2002-10-04 2004-07-26 Miba Gleitlager Gmbh Verfahren zum galvanischen beschichten einer sich im wesentlichen über einen halbkreis erstreckenden, zylindrischen innenfläche eines werkstückes
FR2870142B1 (fr) 2004-05-17 2007-02-09 Snecma Moteurs Sa Procede de decapage d'une piece creuse de revolution et dispositif mettant en oeuvre un tel procede
CN102345153A (zh) * 2011-09-09 2012-02-08 东莞生益电子有限公司 镀铜缸有机污染净化装置及其净化方法
CN110344100B (zh) * 2019-07-23 2024-05-28 江苏欧姆圣智能装备股份有限公司 镀槽溢流装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1417464A (en) * 1920-07-16 1922-05-23 Thomas A Edison Production of thin metal sheets or foils
US3450625A (en) * 1964-10-29 1969-06-17 Kenneth C Ramsey Electrolytic plating tank
BE791007A (fr) * 1971-11-09 1973-05-07 Citroen Sa Perfectionnements apportes aux installations pour effectuer un revetement electrolytique
US4160709A (en) * 1975-12-23 1979-07-10 Messerschmitt-Bolkow-Blohm Gmbh Process for the galvanic deposition of nickel from a nickel bath
NL7805266A (nl) * 1977-05-23 1978-11-27 Uss Eng & Consult Werkwijze en inrichting voor galvanisch vertinnen.
DE3107101A1 (de) * 1981-02-20 1982-09-09 Schering Ag, 1000 Berlin Und 4619 Bergkamen Vorrichtung und verfahren zur galvanischen metallabscheidung auf gegenstaenden, deren reinigung von anhaftenden oberflaechenbehandlungsmitteln sowie deren rueckgewinnung
DE3429890A1 (de) * 1984-08-14 1986-02-20 Maschinenfabrik Kaspar Walter GmbH & Co KG, 8000 München Vorrichtung zum aufbringen einer kupferschicht auf einen tiefdruckzylinder
DE3510592A1 (de) * 1985-03-23 1986-10-02 Hoesch Stahl AG, 4600 Dortmund Hochgeschwindigkeits-elektrolysezelle fuer die veredelung von bandfoermigem gut
JP2549557B2 (ja) * 1989-03-14 1996-10-30 富士写真フイルム株式会社 電解処理装置
US5346607A (en) * 1992-09-30 1994-09-13 Weirton Steel Corporation Electrolytic tinplating and product
US5391285A (en) * 1994-02-25 1995-02-21 Motorola, Inc. Adjustable plating cell for uniform bump plating of semiconductor wafers
US5514258A (en) * 1994-08-18 1996-05-07 Brinket; Oscar J. Substrate plating device having laminar flow

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9521952A1 *

Also Published As

Publication number Publication date
WO1995021952A1 (fr) 1995-08-17
US5716509A (en) 1998-02-10
DE59402538D1 (de) 1997-05-28
EP0694090B1 (fr) 1997-04-23
AU5968594A (en) 1995-08-29

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