EP0268977B1 - Dispositif de placage électrolytique d'un objet allongé. - Google Patents

Dispositif de placage électrolytique d'un objet allongé. Download PDF

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Publication number
EP0268977B1
EP0268977B1 EP87116934A EP87116934A EP0268977B1 EP 0268977 B1 EP0268977 B1 EP 0268977B1 EP 87116934 A EP87116934 A EP 87116934A EP 87116934 A EP87116934 A EP 87116934A EP 0268977 B1 EP0268977 B1 EP 0268977B1
Authority
EP
European Patent Office
Prior art keywords
wheel
electrolyte
conductive article
spraying device
coating
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
EP87116934A
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German (de)
English (en)
Other versions
EP0268977A1 (fr
Inventor
Rolf Niemeyer
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.)
Schempp & Decker Maschinenbau GmbH
Original Assignee
Schempp & Decker Maschinenbau GmbH
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6314573&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0268977(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Schempp & Decker Maschinenbau GmbH filed Critical Schempp & Decker Maschinenbau GmbH
Priority to AT87116934T priority Critical patent/ATE61069T1/de
Publication of EP0268977A1 publication Critical patent/EP0268977A1/fr
Application granted granted Critical
Publication of EP0268977B1 publication Critical patent/EP0268977B1/fr
Anticipated expiration legal-status Critical
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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
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/02—Electroplating of selected surface areas
    • C25D5/022—Electroplating of selected surface areas using masking means

Definitions

  • the invention relates to a device for the galvanic coating of parts of an elongated, longitudinally moving electrically conductive object, consisting of a rotatably mounted plastic wheel, on which the conductive object guided over guide rollers rests moisture-tight on a part of the circumferential surface, from at least an endless band of insulating material which is guided over deflection rollers and which, when the parts to be coated are released, lies tightly against the conductive object and can be moved at the same speed as this, from an electrolyte container containing the coating material and from at least one on the path of movement of the conductive Object directed spray nozzle (DE-OS 24 47 091).
  • the elongated, electrically conductive object can be a metal strip which is continuously coated with strips or interrupted patterns and from which the corresponding contact elements or conductor tracks are punched out.
  • the elongated, electrically conductive object can, however, also be a multiplicity of metallic sleeves which are fastened to a common band and are to be coated on the inside.
  • the word "metal strip” is used in the following instead of the words "elongated, electrically conductive object".
  • the wheel is immersed up to half in the electrolyte.
  • the spray nozzle is also located in the electrolyte.
  • a part of the circumferential surface of the wheel has a metal strip to be coated which is moisture-tight and moves continuously and is at least partially covered by at least one strip of insulating material.
  • the wheel rotating slowly about its axis during the coating is constantly exposed to different temperatures.
  • the electrolyte is heated to a temperature of about 60 ° C, while outside the electrolyte there is a room temperature of about 20 ° C.
  • the dimensions (diameter) of the wheel made of plastic fluctuate accordingly, which also leads to dimensional fluctuations or inaccuracies in the deposited layers.
  • the electrolyte is also carried along by the rotating wheel. As a result, it can reach its storage location, which can be destroyed. Furthermore, the known device requires a relatively large volume for the electrolyte because of the immersing wheel. This makes it particularly expensive when a precious metal, such as gold or silver, is to be deposited. The effectiveness of the spray nozzle is severely impaired in this known device, since it is arranged in the electrolyte, so that the jet emerging from the spray nozzle is braked by the electrolyte surrounding it. The band of insulating material is also tensioned with a complicated tensioning device, which makes it difficult to insert the metal band when the device is started up.
  • the invention has for its object to provide a device for the galvanic deposition of layers on a moving in its longitudinal direction, partially against a wheel made of plastic metal tape, which is easy to handle, in which the wheel is not exposed to large temperature fluctuations and with a small electrolyte volume.
  • the wheel is not immersed in the electrolyte, but the electrolyte is sprayed onto the areas of the metal strip to be coated using a spray device.
  • the electrolyte volume can be kept small, so that the device is particularly suitable for coating with precious metals such as gold and silver.
  • the wheel is not exposed to different temperatures during operation, so that its dimensions do not fluctuate during operation. The layers to be deposited can therefore be applied with great dimensional accuracy. Since the electrolyte is constantly pumped out of its container and returned to it after leaving the spraying device, there is always a quick exchange of the Electrolytes instead, so that a good mass transport is guaranteed.
  • the diffusion layer is also destroyed by the electrolyte applied unhindered to the areas of the metal strip to be coated, so that there is a maximum current efficiency. Due to the radial adjustability of the wheel, there is also a simple possibility for tensioning the band made of insulating material. This is particularly noticeable when the device is started up if a metal band is passed around the wheel.
  • a wheel profiled on its peripheral surface is used. It has a circumferential, U-shaped recess in the peripheral surface, in which the metal band and the band of insulating material lie. Since both are manufactured with great dimensional accuracy, there are no management problems here.
  • the spraying device is brought so close to the metal strip that it protrudes into the recess. This provides additional security against wetting of the outer surfaces of the wheel by the electrolyte.
  • the protruding edges of the wheel on both sides of the recess can be pointed or in the form of a groove. Drip noses form on the resulting sharp edges, from which the excess electrolyte is easily detached.
  • Fig. 1 is an overall view of the device according to the invention in a schematic representation.
  • Fig. 2 is a plan view of the spray device.
  • Fig. 5 shows a portion of a coated metal strip.
  • Fig. 6 shows a number of sleeves to be coated, attached to a band.
  • the 1 has a base plate 1, on which a wheel 2 made of plastic is rotatably mounted.
  • the wheel 2, which is made of a temperature-resistant and mechanically stable plastic - for example PMMA - can be adjusted in the radial direction in accordance with the double arrow 3.
  • the wheel 2 is adjustable in height. Pneumatics are preferably used for the adjustment so that, in the event of leaks, no contamination of the electrolyte, for example due to escaping hydraulic oils, can occur.
  • the device also includes four deflection rollers 7 to 10, likewise attached to the base plate 1, around which at least one band 11 made of insulating material is guided as an endless band. Between the deflection rollers 7 and 8, the band 11 is also firmly against the circumferential surface of the wheel 2. As a result, it is pressed against the metal strip 6.
  • the arrangement of the wheel 2, the guide rollers 4 and 5 and the deflection rollers 7 to 10 on the base plate 1 ensures that all axes of these parts run parallel to one another.
  • Metal band 6 and band 11 can therefore be a be led wall-free.
  • an edge lying in one plane can be attached to all rollers and to wheel 2.
  • the covering band 11 can consist of two or more partial bands lying next to one another (FIG. 3) if continuous strips are to be deposited on the metal band 6. However, it can also be provided as a one-piece band with separate openings which partially leave the surface of the metal band 6 free for coating.
  • a spray device 12 is fastened to the base plate 1, which is connected to an electrolyte container 13 via a pump system (not shown). At least one anode, not shown, is attached in the spray device 12.
  • the spraying device 12 is preferably bent with a radius of curvature that corresponds to the radius of the wheel 2. It has at least one opening 14 pointing in the direction of the wheel 2, from which the electrolyte containing the coating material can emerge under pressure.
  • the spray device 12 is surrounded by a trough 30, through which excess electrolyte is collected and returned to the container 13.
  • the base plate 1 and the electrolyte container 13 can be arranged on a frame 15, which is preferably equipped with rollers 16 and can therefore be easily transported to any place of use as a replaceable unit.
  • the peripheral systems otherwise required for a galvanic system, such as rectifiers, pumps, adjusting elements and metering devices, can also be attached to the frame.
  • the wheel 2 is brought into the position shown in broken lines in FIG. 1.
  • the covering band 11 is relaxed.
  • the metal strip 6 to be coated can now be inserted very easily into the device.
  • it is placed on the two guide rollers 4 and 5 and connected with its free end to a trigger.
  • the wheel 2 is then moved downward and brought into the position shown in FIG. 1. It takes the metal band 6 with it and presses it and the band 11 firmly against its peripheral surface.
  • the band 11 is tensioned very simply in this way with the required force. A separate clamping mechanism is not necessary.
  • the metal strip 6 When the device is operating, the metal strip 6 is drawn off from a supply spool (not shown), for example in the direction of the arrow P or in the opposite direction. For example, there is electrical voltage between the two guide rollers 4 and 5. In the area of the spraying device 12, the metal strip 6 is coated at the points not covered by the strip 11. The coated metal strip 6 can be wound onto a spool or can be fed directly to further processing.
  • the wheel 2 is preferably constructed from disks 17 so that it can easily be adapted to metal strips 6 of different widths and profiles.
  • four disks 17 are present.
  • annular disks can also be used, which are pushed onto a central cylindrical base body of the wheel 2 in the desired number.
  • the wheel 2 has a circumferential, U-shaped recess 18 in its peripheral surface for receiving and guiding the metal strip 6 and the strip 11.
  • the recess 18 is delimited on both sides by projections 19 and 20 which protrude radially with respect to the wheel 2.
  • the free ends of the projections 19 and 20 can be tapered (19) or designed as a fillet (20).
  • the pointed edges created in this way act as drip noses, from which excess electrolyte easily detaches.
  • the spray head of the spray device 12 is brought as close as possible to the metal strip 6 to be coated. It preferably protrudes into the recess 18. This provides additional security that the wheel 2 is not contaminated on its outside.
  • a cover band 21 made of insulating material is preferably attached around the same. 3 has three bands 11, between which there are gaps. With this device, strips 22 (FIG. 5) can therefore be deposited on a metal strip 6.
  • the spray device 12 is attached to the side of the wheel 2 opposite the shoulder 24. It has at least one nozzle 25 as an opening, which runs parallel to the axis of the wheel 2 and is brought as close as possible to the sleeves 23 to be coated.
  • the wheel 2 is equipped with an axial projection 26 which largely covers the nozzle 25 and thereby prevents electrolyte escaping from the nozzle 25 from reaching the outside of the wheel 2.
  • the sleeves 23 are attached to a strip 27.
  • the unit of strips 27 and sleeves 23 is arranged on the circumferential surface of the wheel 2 between two correspondingly profiled bands 28 and 29.
  • the band 29 corresponds to the band 11 described above.
  • the sleeves 23 are covered by the two bands 28 and 29 from the outside. Therefore, only the inner surfaces are coated with a correspondingly low material consumption.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Spray Control Apparatus (AREA)
  • Physical Vapour Deposition (AREA)
  • Chemically Coating (AREA)
  • Conductive Materials (AREA)
  • Paints Or Removers (AREA)

Claims (12)

  1. Dispositif de placage électrolytique de parties d'un objet allongé, conducteur d'électricité, se déplaçant dans sa direction longitudinale, constitué d'une roue en matière plastique montée rotative contre laquelle est appliqué l'objet conducteur, de manière étanche à l'humidité sur une partie de surface périphérique, guidé par des rouleaux de guidage, constitué d'au moins un ruban sans fin en matière isolante guidé par des poulies de renvoi, qui tout en dégageant les parties à plaquer, est appliqué à l'état tendu tout contre l'objet conducteur, et se déplace à la même vitesse que celui-ci, constitué d'une cuve d'électrolyse contenant la matière de placage, ainsi que d'au moins un gicleur orienté vers la voie de déplacement de l'objet conducteur, caractérisé
    - en ce que dans la zone dans laquelle l'objet conducteur est appliqué contre la surface périphérique de la roue (2) non immergée dans l'électrolyte, il est disposé un dispositif de pulvérisation (12) communiquant avec la cuve d'électrolyse, situé à l'extérieur de l'électrolyte, comportant au moins un orifice dirigé vers l'objet conducteur, par lequel l'électrolyte sort sous pression,
    - en ce que la roue (2) est réglable radialement, à peu près perpendiculairement à la partie du ruban (11) en matière isolante, appliquée contre l'objet conducteur.
  2. Dispositif selon la revendication 1, caractérisé en ce que sur le pourtour de la roue (2), est pratiqué un creux (18) périphérique, de section transversale en U, destiné à recevoir l'objet conducteur et le ruban (11) en matière isolante, lequel creux est limité des deux côtés par des saillies radiales (19, 20).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les extrémités libres des saillies (19, 20) sont pointues ou en forme de gorge.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la largeur du creux (18) et par conséquent la largeur de la roue (2) est réglable.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la roue (2) est constituée d'au moins deux disques (17) ou anneaux de disque.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que le dispositif de pulvérisation (12) est courbé dans la direction du pourtour de la roue (2), selon un rayon de courbure correspondant à peu près au rayon de la roue (2).
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que le dispositif de pulvérisation (12) pénètre dans le creux (18) pratiqué sur le pourtour de la roue (2).
  8. Dispositif selon la revendication 1, caractérisé en ce qu'un talon continu (24) faisant saillie radialement est placé sur une face de la roue (2) et en ce que le dispositif de pulvérisation (12) disposé sur la face opposée de la roue (2), comporte au moins un gicleur (25) dirigé vers l'axe de la roue (2).
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que tous les éléments constitutifs tels que les rouleaux, la roue et le dispositif de pulvérisation, sont disposés sur un socle (1) commun.
  10. Procédé de placage électrolytique partiel d'un objet conducteur d'électricité, comportant un dispositif selon l'une des revendications 1 à 9, caractérisé en ce que l'électrolyte contenant la matière de placage est pulvérisé sur les parties à plaquer, immergées dans l'électrolyte.
  11. L'application d'un dispositif selon l'une des revendications 1 à 7 et 9 au placage partiel d'un ruban métallique (6).
  12. L'application d'un dispositif selon l'une des revendications 1 ainsi que 8 et 9 pour le placage intérieur de douilles (23) métalliques fixées sur une bande (27).
EP87116934A 1986-11-22 1987-11-17 Dispositif de placage électrolytique d'un objet allongé. Expired - Lifetime EP0268977B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87116934T ATE61069T1 (de) 1986-11-22 1987-11-17 Vorrichtung zum galvanischen beschichten eines elektrisch leitenden gegenstandes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3639975 1986-11-22
DE3639975 1986-11-22

Publications (2)

Publication Number Publication Date
EP0268977A1 EP0268977A1 (fr) 1988-06-01
EP0268977B1 true EP0268977B1 (fr) 1991-02-27

Family

ID=6314573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116934A Expired - Lifetime EP0268977B1 (fr) 1986-11-22 1987-11-17 Dispositif de placage électrolytique d'un objet allongé.

Country Status (4)

Country Link
EP (1) EP0268977B1 (fr)
AT (1) ATE61069T1 (fr)
CS (1) CS270231B2 (fr)
DE (2) DE3708779A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937926A1 (de) * 1989-11-15 1991-05-16 Schering Ag Vorrichtung zum abblenden von feldlinien in einer galvanikanlage
DE10205586B4 (de) * 2002-02-09 2007-07-05 Degussa Galvanotechnik Gmbh Verfahren und Vorrichtung zur galvanischen Beschichtung von Endlosmaterial

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL170027C (nl) * 1971-05-25 1982-09-16 Galentan Ag Verbetering van een om een vaste as draaibare elektrolyt-verdeelinrichting.
DE2324834C2 (de) * 1973-05-17 1978-09-07 Dr. Eugen Duerrwaechter Doduco, 7530 Pforzheim Vorrichtung zum kontinuierlichen selektiven Bandgalvanisieren
CH594067A5 (fr) 1973-10-04 1977-12-30 Galentan Ag
NL8101106A (nl) * 1981-03-07 1982-10-01 Galentan Ag Inrichting voor het galvanisch aanbrengen van vlekvormige bedekkingen.
US4431500A (en) * 1981-12-15 1984-02-14 Vanguard Research Associates, Inc. Selective electroplating apparatus

Also Published As

Publication number Publication date
DE3768210D1 (de) 1991-04-04
CS842687A2 (en) 1989-10-13
DE3708779C2 (fr) 1989-03-16
ATE61069T1 (de) 1991-03-15
CS270231B2 (en) 1990-06-13
EP0268977A1 (fr) 1988-06-01
DE3708779A1 (de) 1988-06-01

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