EP1348044A1

EP1348044A1 - Device and method for electrochemically treating a band-shaped product

Info

Publication number: EP1348044A1
Application number: EP01991703A
Authority: EP
Inventors: Egon Hübel
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-29
Filing date: 2001-12-28
Publication date: 2003-10-01
Also published as: DE10065643A1; WO2002053807A1; DE10065643C2

Abstract

The invention relates to the electrochemical treatment of a band-shaped product on continuous conveyor belts. Said method is particularly advantageous as it is capable of treating electrically conductive and mutually insulated structures on electrically non-conductive substrates. Electric contacting of the surfaces which are to be treated occurs by means of contacts (4) which are disposed in the form of strips on the lateral surface of a rotating, cylindrically shaped contact electrode (30). Counter electrodes (7) are disposed between each contact strip (3). The band-shaped product (1) is wound around the contact electrode (30). The electrically contacted surface of the product (1) and the counter electrode (7) respectively form temporary electrolytic small cells (9), wherein the product (1) is electrochemically treated.

Description

Device and method for the electrochemical treatment of strip material

description

The invention relates to a device and a method for the one- or two-sided electrolytic treatment of strip-like material from roll to roll in continuous systems or in belt systems. The material can be completely electrically conductive on the entire surface. The preferred application is an electrically insulating material which is provided on the surface with electrically conductive and mutually insulated structures. This kind of good occurs, for example, in conductor foil technology and in smart card technology. Most of the time, these are tapes with holes. The invention is suitable for electrochemical metallization, etching, oxidizing and reducing goods. Electrolytes with and without a redox system are used. To simplify the description, the invention is described below using the example of the metallization of the goods. For this purpose, the polarities of the electrodes are also entered in the figures.

In the case of electrolytic belt treatment from roll to roll, the electrical contacting of the goods via electrically conductive and rotating contact rollers is state of the art. However, this contact requires that at least the surface of the goods to be treated is full-surface and is sufficiently electrically conductive for the electroplating current. This is not the case, for example, with sputter layers on an electrically non-conductive substrate. These very thin metallic layers therefore only allow the use of uneconomically low electroplating current densities.

Is the electrically conductive surface to be treated applied in a structured manner on an electrically non-conductive substrate, e.g. by laser structuring or etching, the known electrical contacting of the surface via the contact rollers cannot be used. In this case, the surface to be treated electrolytically consists of many mutually electrically insulated surfaces. These areas are e.g. in circuit board technology around individual conductor tracks or pads. Insulated surfaces of this type have hitherto been processed chemically. Chemical metallization in particular is cost-intensive and critical in bath management and wastewater treatment. The bathroom container is also often disruptively metallized. As a result, such chemical plants have to be cleaned and freed from wild growth after a few days of operation.

In the not yet published document DE 100 43 817.2, an arrangement and a method are described which are suitable for the electrochemical treatment of solid surfaces that are not very conductive. They are also suitable for the electrochemical treatment of electrically conductive and mutually insulated structures on an insulating substrate. This can be a plate-like product or molded parts as well as flexible tapes that are wound from roll to roll. A contact electrode which is adapted to the surface shape of the material is pressed cyclically onto the material to be treated, small electrolytic cells being formed. For this purpose, the surface of the goods is electrically contacted by contact strips. The contact strips are electrically insulated except for the actual contact area. Between the contact strips, the counter electrodes are set back in a strip shape. In the case of electroplating, these counter electrodes are the anodes. Insoluble anodes are preferably used. The contact electrode and the method for producing the same are described in the not yet published document DE 100 43 816.4. Contact electrodes with very small dimensions of the contact strips and the counter electrodes can be produced. For example, with dimensions and mutual distances on the order of the conductor widths as they occur in printed circuit board technology and in wafer technology, that is, less than one millimeter. They can also be manufactured with significantly larger dimensions and mutual distances of up to a few decimeters. When using the inventions mentioned, the contact electrode is pressed onto the surface to be treated by means of a movement member. In this case, either the transport of the goods is stopped or the contact electrode moves synchronously with the goods for a short distance when pressed. Then the contact electrode is moved back without good. This process is repeated continuously. One or more contact electrodes are involved in the treatment of the goods. In the case of band-shaped, flexible goods from roll to roll, stopping the transport, in particular if the rolls are large and heavy, is technically complex. The in-flight treatment of the goods described is also technically complex.

The object of the present invention is to provide a device and a method which are suitable for electrochemically treating flexible, strip-like material from roll to roll in continuous systems, while reducing the technical outlay described in the cited documents. The object is achieved by the device described in claim 1 and by the method according to claim 14.

According to the invention, in an electrolytic bath, also called a working container, there are essentially roller-shaped, rotating contact electrodes, which are referred to below as contact electrodes. The contact electrodes connected to a rotary drive are partially wrapped around the strip-like material to be treated. The rotation can, for example, also by means of a perforation in the band-like material with the corresponding elevations trained contact electrodes are transferred. In this case, the belt drive is located outside the work container. As a result of the transport tractive force, the non-insulated contact surfaces of the contact strips are pressed against the surfaces of the goods. This leads to electrical contacting of the surfaces to be treated, regardless of whether they are full-area or structured. The surface areas of the goods between each two contact strips and the counter electrodes located between them form small electrolytic cells which are electrically connected to at least one bath current source via current conductors and two-pole, rotating current transmission devices. The bath current sources can be direct current, unipolar pulse current or bipolar pulse current. The contact electrodes are at least partially, preferably completely, below the bath level of the electrolyte. As a result, when the contact electrodes rotate, the small cells are filled with electrolyte, which exchanges with each revolution. The electrochemical treatment takes place in the area of the wrap angle of the goods around the contact electrode. The tape is guided around these electrodes and around deflecting rollers in such a way that, if necessary, the material is treated on one or both sides. The belt tension due to transport allows the use of hard metal contacts. They cause very good electrical contact.

The contacts of the contact strips can consist of a hard, electrically conductive material, e.g. made of metal. They can advantageously also consist of an elastic and electrically conductive material, e.g. Made of an elastomer enriched with metal powder, which attaches particularly reliably to unevenness in the goods and makes electrical contact.

For the manufacture of the contact electrodes, reference is made to the above-mentioned document DE 100 43 816.4. The production methods described there mainly for flat contact electrodes are also fundamentally suitable for the production of cylindrical contact electrodes. Rotary processing such as turning, milling, cylindrical grinding, eroding, etching or coating essentially takes place here for production. The invention is explained in more detail with reference to FIGS. 1 to 6. They show a schematic and non-proportional representation

Figure 1 in cross section a section of a contact electrode with the basic structure of the electrolytic small cells. Figure 2 shows a cross section through an electrolytic bath, which is equipped with contact electrodes and other devices for tape transport, for the electrolyte circulation and with the bath power source. Figure 3 shows an arrangement of contact electrodes in the electrolytic bath in such a way that with a large wrap angle of the goods around

Contact electrodes only require a short working container. Figure 4 shows an arrangement of contact electrodes in an electrolytic

Bath for one-sided electrochemical treatment of the goods with a large wrap angle of the goods around the contact electrodes. Figure 5 two contact electrodes with additional static electrodes for

Demetallization of contacts and connection of bath power sources. Figure 6 details of the anodic current shutdown outside the wrap angle by means of a collector wheel.

FIG. 1 shows a contact electrode 30 and a flexible material 1 to be treated electrolytically, which is electrically conductive. The good can also be a non-conductive material that has an electrically conductive layer 2 on the surface that is to be treated. This layer can be full-area or structured, ie consist of electrically insulated islands. The dimensions of the structures of the fine conductor technology can be very small. The minimum widths and diameters are 0.025 mm, for example. In the Gut 1 there can also be blind holes and / or through holes with the same dimensions. The surface to be treated electrolytically is contacted electrically by at least one contact strip 3 of the contact electrode 30. This contact strip 3 extends vertically into the plane of the drawing. It consists of the contact 4 and from the contact insulation 5 located on both sides thereof. The contact insulation 5 completely covers the contact 4, with the exception of the actual contact surface. The contact surfaces of the contacts 4 sit on the electrically conductive layer 2 and thus establish the electrical connection to the good 1. The contact strips 3 are fastened to the outer surface of the cylindrical base body 6. This is mounted to rotate about the axis 23. The alignment of the contact strips 3 is preferably axial. Between two contact strips 3 there is an electrically conductive and also elongated counterelectrode 7. As a rule, many to very many contact strips 3 and counterelectrodes 7, for example 200 each, are arranged on the lateral surface of the base body 6. These contacts 4 are each connected to one another by means of electrical conductors 8 on the insulated base body 6, or are connected to one another in groups. The two-pole current supply from the bath current source 12 to the counter electrodes 7 and to the contacts 4 of the rotating contact electrode 30 takes place via a cathodic current transmission device 10 and via an anodic current transmission device 11. All contacts 4 are connected to the negative pole of the bath current source 12 via a slip ring 15 and at least one sliding contact 16 is electrically connected. The positive pole of the bath current source is connected to the counter electrodes 7 via a further slip ring and at least one sliding contact. Instead of the slip rings and sliding contacts, liquid rotating contacts can also be used for power transmission.

In a preferred embodiment, the electrical connection to the counter electrodes 7 of the contact electrode 30 is established via a collector wheel 31. The collector wheel 31 is divided into collector segments 32. The counter electrodes 7 of a contact electrode 30 are divided into at least three groups when using a collector wheel 31. Each group is connected to a collector segment 32 by means of current conductor 8. The number of collector segments corresponds to the number of groups of counter electrodes. At least one sliding contact 16 connects the collector wheel 31 to the positive pole of the bath current source 12. The polarity of the bath current source 12 shown in FIG. 1 shows that Use in electroplating and electrochemical reduction of the goods.

The electrically conductive layer 2 and the counterelectrode 7 each form an electrolytic small cell 9. The electrolyte exchange in these small cells 9 takes place with every revolution of the contact electrode 30 by scooping in the area of the contact electrode which is currently not wrapped in the material. At the same time, gas is discharged which can arise during the electrochemical process.

FIG. 2 shows a transport device for conveying the flexible, band-shaped material 1 from roll to roll with electrochemical treatment on the contact electrodes 30 in between are. The contact electrodes 30 are driven by a drive 19 using known drive elements 21 to rotate about axes 23. These schematically illustrated drive elements 21 are e.g. from shafts, gears and bearings. Sealing elements are used when the waves are guided under the bathroom mirror through the wall of the working container 20. The transport device also includes deflecting rollers 24 and other known belt guide means. These means of transport can be driven or not driven. The non-driven means of transport are set in rotation by the continuous belt. The drive 19 is synchronized with the unwinding and winding devices (not shown), the so-called stores, for the good 1. The known wet chemical pretreatment and post-treatment baths and a dryer are also not shown.

The electrolyte 28 is continuously conditioned during the treatment of the goods. This includes filtering in a circuit through the filter 26 by means of an electrolyte pump 25. A metering unit 27 is located in the pipes 29 of the electrolyte circuit. The substances that are required for the electrochemical process, including the metal ions, are supplied here for electroplating with anodes insoluble in the electrolyte. These substances can also be fed directly into the working container 20. The pipes 29 of the electrolyte circuit are arranged so that the electrolyte flows through the working container 20 in countercurrent to the transport of goods. The directional arrow 17 shows the direction of transport of the goods 1. Accordingly, the contact electrodes rotate as indicated by the direction of rotation arrow 18.

The contact electrodes 30 are partially wrapped around the good 1. The wrap angle 22 shown in FIG. 2 is approximately 180 °. In this case, the contact electrode 30 is galvanized during half a revolution. During the other half revolution, the electrolyte is exchanged between the contact strips 3 and the counter electrodes 7 and the resulting gas is discharged. To strengthen the electrolyte exchange, the contact electrodes can be hollow on the inside. Electrolyte under pressure is introduced into this cavity via a rotary coupling. The electrolyte additionally reaches the surface of the material through openings which lead from the cavity through the counterelectrodes 7 into the small cells. This means that conditioned electrolyte is always available for the electrochemical process. For a given transport speed, the electrolyte is exchanged more frequently with decreasing diameter of the contact electrode. The good 1 is treated on both sides in this exemplary embodiment of the invention. Driven or non-driven deflection rollers 24 are used to guide the band-shaped material 1.

The electrical connection of the strip-shaped electrodes on the circumference of the contact electrodes 30 to the bath current source (s) 12 takes place via the electrical conductors 8 and via the current transmission devices 10 and 11, which are preferably located outside the working container 20 on the axes 23 of the contact electrodes 30. The axes are sealed using sealing elements so that the electrolyte cannot leak. The bath current source 12 is a constant current source or constant voltage source. Constant voltage is preferably used when the size of the surface of the goods to be treated electrochemically is unknown. This can be done with electrical isolated structures. The constant current is preferably used for full-surface areas.

It can be seen in FIG. 2 that the material 1 is treated on one surface side by two contact electrodes and on the other side by three contact electrodes. These differences can be compensated for by separate rectifiers for the bath current on each side and individually set currents in the small electrolytic cells of each contact electrode. If layers with low electrical conductivity are to be treated, an increasing current density can be used from the contact electrode to the contact electrode in the direction of transport of the goods to increase the power.

In Figure 3, both sides of the goods are treated by the same number of contact electrodes. This requires an additional deflection roller 24. The contact electrodes are arranged here in such a way that the wrap angle 22 is approximately 270 °. The electrochemical treatment per revolution of the contact electrode is correspondingly longer. In Figure 3, the other necessary technical equipment, as described in Figure 2, are no longer shown. In systems for treating less flexible goods, a significantly smaller wrap angle may also be required, e.g. 20 °. The same applies if the diameter of the contact electrode is also small. The flexibility of the goods and the diameter of the contact electrode essentially determine the maximum possible wrap angle.

In FIG. 4, the contact electrodes 30 are arranged so close to one another that the largest possible wrap angle 22 is formed for the one-sided treatment of the good 1. The further deflecting rollers 24 are required for this. To avoid excessive tensile forces, they are advantageously motor-driven, just like the contact electrodes themselves. The circumferential speed of all rotating elements is largely the same. To compensate for technically occurring deviations in the speeds, some or all of the deflecting rollers 24 can be designed as dancer rollers. Such rotating rollers are radially movable. You can locally compensate for any length differences that currently occur in the band-shaped material.

In all cases, the number of contact electrodes required for one-sided or double-sided treatment of the good 1 depends on the required exposure time. This is essentially determined by the transport speed, the applicable current density and the layer thickness to be deposited electrolytically for a given current yield. Given the production throughput, that is to say the transport speed and the design wrap angle 22, the number of contact electrodes required and their diameter are obtained.

For electrochemical treatment, it is more advantageous to work with a higher transport speed and correspondingly more contact electrodes. In this case, the goods are contacted more frequently at other points on the surface. This results in a statistically distributed, equally long electrochemical treatment of all surface areas of the good. It could happen that the length of the good 1 from one contact electrode 30 to the next one is exactly so long that at each contact electrode 30 the parallel and straight axial contact strips 3 always contact the same place of the good 1. These points would then not be treated during the entire run through the electrochemical system. This can be avoided by phase-synchronous drives of the contact electrodes and by different band lengths from contact electrode to contact electrode. As a result, contact is made at a different point on the material at each contact electrode.

Another solution is to provide the contact strips 3 on the lateral surfaces of the individual contact electrodes with different and non-parallel courses to the axes of the contact electrodes. A non-axial course also includes curved, up to helically winding courses of the contact strips 3 and the parallel counter electrodes 7 on the outer surface of the contact electrode. Another solution in the case of an axially parallel course of the contact strips 3, that is to say on a surface line in each case, is that the distances between the contact strips 3 from one another are chosen to be different in size from the contact electrode to the contact electrode. Different distances between the contact strips 3 on a contact electrode with or without different diameters of the contact electrodes likewise result in a statistical distribution of the contact lines on the material 1 from contact electrode to contact electrode. In the case of different diameters, the same circumferential speed must be ensured with suitable drive ratios.

The contacting surfaces can also be statistically distributed on the material by a non-constant slip insertion from contact electrode to contact electrode by means of the deflecting rollers 24, which in this case are designed as dancer rollers.

The spray tube 33 serves to reinforce the electrolyte exchange and the gas discharge from the surface of the contact electrodes. The spray tube 34 serves to spray the good surface. The spray tubes are particularly advantageous when there are very small holes or blind holes in the material. The spray tubes or nozzle sticks can be arranged on each contact electrode. The associated known electrolyte pumps and filters are only shown in Figure 2.

The transport speed of the goods 1 through the working container can be set in a very wide range, for example from 0.001 meters per minute to 1000 meters per minute and more, because of the versatile application possibilities of the invention. The transport speed of the goods basically corresponds to the peripheral speed of the contact electrodes, transport rollers and deflection rollers. This means that there is no relative speed between the material on the one hand and the electrodes and rollers on the other. The invention is also suitable for the treatment of wires and plastic threads with electrically conductive properties from roll to roll. Wires and threads are to be regarded as a special form of tape.

In the electrolytic treatment of strip-like material, the contact electrodes and rollers can be set in rotation by the material itself. For this purpose, a good is used that is provided with at least one longitudinal perforation. The perforation, similar to a film, engages in corresponding elevations of the contact electrodes and rollers and thus drives them. The material itself is drawn through reels and winding devices which are arranged outside the working container.

During a galvanizing process, it can happen, in particular outside the wrap angle 22, that the contacts 4 are metallized. This is also the case, for example, if the contact insulation 5 of the contact strip 3 is damaged. In this case, the contact electrodes 30 must be removed and demetallized from time to time. FIG. 5 shows a continuous demetallization process without removing the contact electrodes. A demetallization electrode 14 is arranged in the vicinity of the contact electrode 30 in the region which is not wrapped in the material. The demetallization electrode 14 is adapted to the curvature of the surface of the contact electrode 30. The electrode 14 covers the free area of the contact electrode 30. The contacts 4 and the demetallization electrode 14 form an electrolytic demetallization cell. Like the contact electrode 30 itself, the demetallization electrode 14 also extends into the depth of the drawing. This depth is adapted to the maximum width of the band-shaped material to be treated. Narrow tapes can be treated with or without bezels. The screens are electrically insulating covers over the areas of the contact electrode that are not required by the strip-like material. If additional electrolyte is passed from a cavity in the interior of the contact electrodes through openings, preferably in the counterelectrodes 7, into the small cells 9, the screens and the demetals prevent lization electrodes 14 at the same time a preferred escape of the electrolyte from areas of the contact electrode 30 not covered by the product. All contacts 4 are electrically conductively connected via the cathodic current transmission devices 10 of the contact electrodes 30 to the positive pole of a demetallization current source 13. The negative pole of this current source is connected to the demetallization electrodes 14. The voltage of the demetallization current source 13 is set so high that an undesired metallization of the contacts 4 which is formed is completely electrolytically suppressed with each revolution of the contact electrode. In this case, at least the surfaces of the contacts 4 must be electrochemically resistant, for example by coating them with a noble metal. Suitable contact materials include titanium, niobium or tantalum. If necessary, the cathodically connected demetallization electrodes 14 are removed from the system and fed to a metal recovery. FIG. S shows details of the anodic current transmission to the contact electrode 30 by means of the collector wheel 31. In order to avoid metallizing the cathodic contacts 4, the anodically connected counter electrodes 7 are selectively switched on and off by means of the collector wheel 31 during one revolution. The collector segments 32, which are identified by A to D, are divided so that there is an anodic contact from the bath current source 12 to the counterelectrodes 7 in the area of the wrap angle 22 formed by the material. Outside the wrap angle 22, the counter electrodes 7 are de-energized by the collector wheel. The cathodic connection from the bath current source 12 to the contacts 4 exists continuously via the slip ring 15. In the illustration in FIG. 6, the collector segment B is currently contacted with the bath current source 12. All counter electrodes 7 electrically connected to the collector segment B are anodically connected. They galvanize the goods not shown. During the entire revolution and thus also outside the wrap angle 22, the positive pole of the demetallization current source 13 is also in electrical connection with all contacts 4 via the slip ring 15. In this area, the contacts 4 form with the cathodic demetallization electrode 14 an electrolytic cell. The anodically polarized contacts 4 are electrochemically cleaned in this cell.

The number of collector segments 32 and the size of the demetallization electrode 14 along the circumference of the contact electrode 30 depends on the size of the wrap angle 22. This demetallization controlled by the collector wheel can be used in all the examples of the invention described above. For drawing reasons, it is only shown in FIGS. 5 and 6. If all collector wheels are synchronized with one another, a single collector wheel synchronized for this purpose or a synchronized electronic collector wheel in the form of electronic switches can also be used for all contact electrodes of a continuous system. This collector bike is arranged separately. In this case, a sliding contact device with sliding contact per contact electrode is required for anodic current supply for each group of counter electrodes 7. This is a less expensive design compared to the collector wheels on the contact electrodes if fewer collector segments are used, e.g. only 3 pieces on a contact electrode.

In all applications of the invention there are further transport means for the goods in the form of rollers, belt guides and drives outside the working container. Likewise, storage for the goods, such as tape winding devices and reels.

Bezugszeichenüste

strip-like material to be treated, electrically conductive layer, contact strip, contact, contact insulation, roller-shaped base body, counter electrode, electrical conductor, electrolytic small cell, cathodic current transmission device, anodic current transmission device, bath current source, de-metallization current source, de-metallization electrode, slip ring, sliding contact, direction arrow for the transport of the goods, direction of rotation arrow for the contact electrodes, drive for the contact electrodes, for the axis, and the contact electrodes for the electrodes Contact electrode deflection roller electrolyte pump filter dosing unit electrolyte Pipelines contact electrode collector wheel collector segment spray pipes to contact electrode spray pipes to Gut

Claims

claims

1.Device for one-sided or double-sided electrochemical metallization, etching, oxidizing and reducing strip-like material from roll to roll in continuous electrolytic systems or conveyor systems with at least a) a working container (20) for holding the electrolyte, b) an electrolytic circulation conveyor through a working container, electrolyte - filter and electrolyte conditioning container, c) a transport device and storage device outside the working container (20) for conveying the goods (1) through the working container, d) a bath current source, characterized by at least e) a roller-shaped, rotatably mounted contact electrode arranged in the working container under the bath level ( 30) with counter electrodes (7) and contact strips (3) arranged on the outer surface of the contact electrode (s), which are electrically insulated on the non-contacting surfaces, f) a transport path of the goods in the working container around the contact electrodes (30) around de rart that through the wrapping, the contact strips (3) of the contact electrode (s) electrically contact the surface (2) of the goods, g) two current transmission devices (10, 11) for the two-pole electrical connection of the bath current source (12) to the contact strips (3) and the counter electrodes (7) of the rotating contact electrode (s) (30).

2. Device according to claim 1, characterized by a transport device for conveying a flexible, band-shaped goods from roll to roll through the working container, consisting of driven and / or non-driven contact electrodes (30) and deflection rollers (24), which each partially wrap around the goods , the peripheral speed of the con- clock electrodes and deflection rollers corresponds to the transport speed of the goods.

3. Device according to claims 1 and 2, characterized by parallel contact strips (3) and counter electrodes (7) with the same or different distances from each other on the lateral surface of the contact electrode (30) and with a straight course in the axial direction.

4. Device according to claims 1 and 2, characterized by parallel contact strips and counter electrodes on the outer surface of the contact electrode with a straight or curved course that deviates from the axial direction.

5. Device according to claims 1 to 4, characterized by slip rings (15) and / or collector wheels (31), attached to the rotating contact electrodes (30), and by sliding contacts (16), for two-pole power transmission from the bath power source (12th ) on the contact electrodes (30).

6. Device according to claims 1 to 5, characterized by a collector wheel (31) with collector segments (32) which are divided such that the counter electrodes (7) are currentless outside the wrap angle (22).

7. The device according to at least one of claims 1 to 6, characterized by a single collector wheel for a plurality of contact electrodes (30) and by a current transfer to the groups of counter electrodes (7) on the contact electrodes (30) by means of a slip ring per group of a contact electrode.

8. Device according to claims 1 to 7, characterized by a demetallization electrode (14) which is arranged in the vicinity of the outer surface of the contact electrode (30) outside the wrap angle (22) and which together with the contacts (4) and with the demetallization - Power source (13) forms an electrolytic cell for cleaning the contacts (4).

9. Device according to claims 1 to 8, characterized by encapsulated, electrical liquid-rotary contacts for bipolar power transmission from the bath power source to the rotating contact electrodes.

10. Device according to claims 1 to 9, characterized by a contact electrode (30) consisting of a hard metal material of the contact (4).

11. The device according to claims 1 to 9, characterized by a contact electrode (30) consisting of an elastic and electrically conductive material of the contact (4).

12. Device according to claims 1 to 11, characterized by a contact electrode (30) consisting of semicircular, groove-shaped contacts on the outer surface of the contact electrode for electrochemical wire and thread treatment.

13. Device according to claims 1 to 12, characterized by a drive of the contact electrodes by the material itself, by means of at least one perforation in the material, and corresponding increases in the contact electrodes (30) and deflection rollers (24).

14. Method for one-sided or two-sided electrochemical metallization,

Etching, oxidizing and reducing tape-like material from roll to roll in electrolytic continuous systems or belt systems, in particular using the device according to claim 1, consisting of the

Steps: a) conveying the goods through a work tank filled with electrolyte, b) bringing the goods into contact with the electrolyte, c) circulating the electrolyte through the work tank and through electrolyte conditioning devices, d) driving and setting the contact electrode (s) in rotation with one

Circumferential speed that is so great that there is no relative speed between the material and the contact strips on the circumference of the contact electrode (s), e) touching the surface of the material to be treated by partially wrapping the contact electrode through the material and thus electrical

Contacting the surface (2) of the good through the contact strips (3) of the contact electrode (s) (30) during the passage through the working container (20), f) formation of small electrolytic cells (9) on the surface (2) of the good, which is currently electrically contacted by a contact (4) of the contact electrode and which is opposite a counter electrode (7), g) supplying bath current to the bath current source (12) via a two-pole current transmission device (10, 11) and via electrical conductors (8) to the Small cells (9), h) electrolytic treatment of the goods in the small cells during the

Rotation of the contact electrode, i) automatic exchange of the electrolyte in the area of the contact electrode that is currently not in contact with the good, j) continuous rotation of the contact electrode (s) and thus continuous electrochemical treatment of the good, which is in the contacting area the rotating contact electrode (s).

15. The method according to claim 14, characterized in that for the electrolytic treatment a plurality of contact electrodes (30) are arranged at different distances from each other and that thereby all surface areas of the goods are treated with the same electrochemical statistical length.

16. The method according to claims 14 and 15, characterized in that the contacts (4) of the contact electrodes (30) in demetallization cells, which are formed in the working container on the contact electrodes (30) with demetallization electrodes (14), by means of a demetallization current source ( 13) be demetallized electrolytically.

17. The method according to claims 14 to 16, characterized in that the groups of counter-electrodes (7) by means of a collector wheel (31) are only in contact with the bath current source (12) when the material is looped around (1) Contact electrode (30) temporarily a small cell (9) was formed.

18. The method according to claims 14 to 17, characterized in that all the contact electrodes of a working container are supplied by a single bath current source (12).

19. The method according to claims 14 to 17, characterized in that each contact electrode of a working container is individually supplied with bath current.

20. The method according to claims 14 to 19, characterized in that for the treatment of wires and threads, these are guided through semicircular, groove-shaped contacts on the circumference of the contact electrode and electrically contacted.

21. The method according to claims 14 to 20, characterized in that electrolyte is introduced from a cavity inside the contact electrode through openings in the counter electrodes into the small electrolytic cells (9).

22. The method according to claims 14 to 21, characterized in that the contact electrode on the outer surface is covered by electrically insulating screens at those points which are not used for the electrochemical treatment of the goods.

23. The method according to claims 14 to 22, characterized in that the contact electrodes and / or the material are sprayed with electrolyte from spray tubes or nozzle sticks.

24. The method according to claims 14 to 23, characterized in that the contact electrodes are set in rotation by a perforated band-shaped material.