EP0694090A1 - Process and device for the electrolytic surface coating of workpieces - Google Patents
Process and device for the electrolytic surface coating of workpiecesInfo
- 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
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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT94905645T ATE152191T1 (en) | 1994-02-15 | 1994-02-15 | METHOD AND DEVICE FOR ELECTROLYTIC SURFACE COATING OF WORKPIECES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH1994/000031 WO1995021952A1 (en) | 1994-02-15 | 1994-02-15 | Process and device for the electrolytic surface coating of workpieces |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0694090A1 true EP0694090A1 (en) | 1996-01-31 |
EP0694090B1 EP0694090B1 (en) | 1997-04-23 |
Family
ID=4549341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94905645A Expired - Lifetime EP0694090B1 (en) | 1994-02-15 | 1994-02-15 | Process and device for the electrolytic surface coating of workpieces |
Country Status (5)
Country | Link |
---|---|
US (1) | US5716509A (en) |
EP (1) | EP0694090B1 (en) |
AU (1) | AU5968594A (en) |
DE (1) | DE59402538D1 (en) |
WO (1) | WO1995021952A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2324805A (en) * | 1997-04-30 | 1998-11-04 | Platt Electromeck Limited | Electroplating |
DE19839479A1 (en) * | 1998-08-29 | 2000-03-02 | Schaeffler Waelzlager Ohg | Chemical or electrochemical treatment of an axisymmetric hollow component involves holding the component in a rotating unit so that a circumferential section of the component is dipped into the treatment bath |
AT411906B (en) * | 2002-10-04 | 2004-07-26 | Miba Gleitlager Gmbh | METHOD FOR GALVANIC COATING OF A CYLINDRICAL INTERIOR SURFACE OF A WORKPIECE, SIGNIFICANTLY EXTENDING OVER A SEMI-CIRCLE |
FR2870142B1 (en) * | 2004-05-17 | 2007-02-09 | Snecma Moteurs Sa | METHOD FOR REMOVING A REVOLUTION HOLLOW PIECE AND DEVICE IMPLEMENTING SAID METHOD |
CN102345153A (en) * | 2011-09-09 | 2012-02-08 | 东莞生益电子有限公司 | Copper-plated cylinder organic pollution purification device and purification method thereof |
CN110344100B (en) * | 2019-07-23 | 2024-05-28 | 江苏欧姆圣智能装备股份有限公司 | Overflow device for plating tank |
Family Cites Families (12)
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 (en) * | 1971-11-09 | 1973-05-07 | Citroen Sa | IMPROVEMENTS MADE TO INSTALLATIONS TO PERFORM ELECTROLYTIC COATING |
US4160709A (en) * | 1975-12-23 | 1979-07-10 | Messerschmitt-Bolkow-Blohm Gmbh | Process for the galvanic deposition of nickel from a nickel bath |
NL7805266A (en) * | 1977-05-23 | 1978-11-27 | Uss Eng & Consult | METHOD AND DEVICE FOR GALVANIC TINER. |
DE3107101A1 (en) * | 1981-02-20 | 1982-09-09 | Schering Ag, 1000 Berlin Und 4619 Bergkamen | DEVICE AND METHOD FOR GALVANIC METAL DEPOSITION ON OBJECTS, THE CLEANING OF ADHESIVE SURFACE TREATMENT AGENTS AND THEIR RECOVERY |
DE3429890A1 (en) * | 1984-08-14 | 1986-02-20 | Maschinenfabrik Kaspar Walter GmbH & Co KG, 8000 München | Device for applying a copper layer onto an engraved cylinder |
DE3510592A1 (en) * | 1985-03-23 | 1986-10-02 | Hoesch Stahl AG, 4600 Dortmund | HIGH-SPEED ELECTROLYSIS CELL FOR REFINING BAND-SHAPED GOODS |
JP2549557B2 (en) * | 1989-03-14 | 1996-10-30 | 富士写真フイルム株式会社 | Electrolytic treatment equipment |
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 |
-
1994
- 1994-02-15 US US08/532,771 patent/US5716509A/en not_active Expired - Fee Related
- 1994-02-15 DE DE59402538T patent/DE59402538D1/en not_active Expired - Fee Related
- 1994-02-15 AU AU59685/94A patent/AU5968594A/en not_active Abandoned
- 1994-02-15 EP EP94905645A patent/EP0694090B1/en not_active Expired - Lifetime
- 1994-02-15 WO PCT/CH1994/000031 patent/WO1995021952A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9521952A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1995021952A1 (en) | 1995-08-17 |
US5716509A (en) | 1998-02-10 |
AU5968594A (en) | 1995-08-29 |
EP0694090B1 (en) | 1997-04-23 |
DE59402538D1 (en) | 1997-05-28 |
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