EP0533778B1 - Device for the continuous, selective galvanizing of a strip of material - Google Patents
Device for the continuous, selective galvanizing of a strip of material Download PDFInfo
- Publication number
- EP0533778B1 EP0533778B1 EP91911231A EP91911231A EP0533778B1 EP 0533778 B1 EP0533778 B1 EP 0533778B1 EP 91911231 A EP91911231 A EP 91911231A EP 91911231 A EP91911231 A EP 91911231A EP 0533778 B1 EP0533778 B1 EP 0533778B1
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- EP
- European Patent Office
- Prior art keywords
- carrier
- strip
- tape
- mask tape
- mask
- 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
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Classifications
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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
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
- C25D7/0671—Selective plating
- C25D7/0678—Selective plating using masks
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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
- 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 is based on a device for the selective, continuous, galvanic coating of a strip with a carrier which guides the strip in the longitudinal direction, the latter being arranged opposite electrolyte outlet openings through which the electrolyte conveyed by a pump is sprayed onto the strip covered by a masking strip and the masking tape is provided with at least one row of holes and presses the tape against the carrier and which has a drive for the tape which causes a relative movement of the tape relative to the masking tape.
- Such devices are known from US Pat. No. 4,431,500.
- the strip to be selectively coated is guided on a wheel and pressed firmly against this wheel with the aid of an immovable masking strip.
- This masking tape is provided with one or more rows of holes and, except for the holes, closes the tape to be coated in a liquid-tight manner.
- a series of electrolyte supply openings are arranged in a circular arc around the wheel with the band lying thereon and the mask band, through which the electrolyte presses against the mask band and spraying the accessible areas of the underlying tape. The relative movement between the band and the mask band prevents a depletion layer that otherwise forms on the band surface and hinders the electrolytic deposition.
- DE-32 12 152-C2 devices with straight supports for guiding a strip to be selectively electroplated are known from DE-32 12 152-C2 and W0-87 / 02076.
- DE-32 12 152-C2 also does not allow selective, continuous, galvanic coating of a tape on both sides, since the mask tapes are pressed onto the tape to be coated by magnetic attraction of the ferromagnetic mask tapes by magnets arranged in the carrier. Therefore, the back of the tape to be coated is not accessible.
- the device according to W0-87 / 02076 also has a rectilinear support.
- the electrolyte is supplied via a porous belt, which moves relative to the belt to be coated, lies against the belt and through its width and position defines the area to be coated for the tape.
- this is only possible for pre-punched tapes, since the abrasion of the tape settles in the pores of the porous tape, clogs it, is galvanized there and reduces the effective area of the porous tape. Only through the use of pre-punched strips can the electrolyte flow in the cutouts of the strip flush the abraded particles out of the porous strip.
- the invention has for its object to provide a device of the type mentioned, which makes it possible to selectively coat any strips both on one side and on both sides in a selective process, without forming a depletion zone which hinders the deposition in the electrolyte .
- the first step for coating on both sides is done in that the carrier, whose job it is to coat the masking tape with the one underneath To guide tape is straight.
- the mask tape has one or more rows of holes.
- the carrier is assigned one or more elongate pressing elements which are parallel to the carrier and press the mask band onto the band in a liquid-tight manner and this on the carrier.
- the pressing elements individually or collectively form one or more openings, which at least temporarily overlap with the holes in the masking band underneath and thus open a passage through the masking band onto the band.
- electrolyte outlet openings are arranged, through which the electrolyte conveyed by a pump is sprayed onto the tape, where the holes of the masking tape and the pressing elements have an overlap.
- the electrolyte passes the anode, which is preferably arranged around the electrolyte outlet openings, and then hits the cathodically polarized band, on which the metal dissolved in the electrolyte is then selectively electrodeposited.
- the carrier can also have openings through which electrolyte liquid can be brought to the back of the band and can thus be selectively coated on both sides.
- the openings of the carrier opposite to additional electrolyte outlet openings, and between the carrier and the band additionally a masking band, which, like the masking band on the other side, is provided with at least one row of holes which overlap with the openings in the carrier .
- the carrier also acts as a pressing element and vice versa.
- the masking tape is preferably also provided with a drive which makes it possible to operate the masking tape in the opposite direction to the tape, so that a higher relative speed of the masking tape compared to the tape to be coated is achieved, which means that the depletion zone is wiped off more quickly and thus a higher deposition speed Consequence.
- the mask band is preferably chosen to be wider than the band, so that it is possible to open the openings in the mask band and to lay in or between the pressing elements in the edge area of the tape and to coat the tape also at the edge.
- the masking tape can be endless, which enables uninterrupted work.
- the band and the mask band are preferably guided in close contact only in the plating zone in order to keep the friction between the mask band and the band to be coated as well as the force for overcoming the friction small and to prevent warping of the bands.
- an individual electrolyte supply opening is assigned to each individual opening, which is formed by the pressing element or the carrier, which allows an optimized supply of the electrolyte to each individual opening.
- the openings which are formed by the pressing elements or the carrier are advantageously designed such that they are funnel-shaped in the direction of the electrolyte supply openings expand, which makes it much easier to precisely feed the electrolyte to the band or mask band. This means that the electrolyte feed opening does not have to be adjusted exactly in relation to the openings.
- the contact surfaces of the carrier and the pressing elements are preferably padded with the band or the mask band.
- This padding is e.g. with a soft foam, preferably with a foam rubber.
- the padding makes it possible to press the masking tape flat against the tape in a liquid-tight manner, with no problems occurring in the case of variable thicknesses of the tapes or even when a kink occurs in the tapes. This reduces the risk of tearing or tearing off the masking tape or the tape to be coated.
- the pressing elements or the carrier form an opening or a series of openings in the band passage direction for each row of holes in the mask band, so that the stripping of the electrolyte depletion zone at the edges of the holes in the mask band as well as at the edges of the holes of the openings is improved .
- the pressing elements or the carrier form one or more slit-shaped openings, which run transversely to the direction of the band passage, which enable the supply of electrolyte to several rows of holes in the mask band at the same time.
- This is made possible with a large-area electrolyte feed opening and a slit-shaped opening that runs across the entire width of the strip, to selectively coat the entire side of the strip.
- the pressing element or elements can advantageously be detached from the carrier. This enables the band and the mask band to be introduced more easily into the unit consisting of carrier and pressing elements. Possibilities of connecting the pressing elements to the carrier are bracing or a tongue and groove connection.
- connections of the pressing elements to the carrier by screwing are advantageous, since the pressure of the pressing elements on the mask mask tape and mask tape and the tape to be coated can be adjusted on the carrier by tightening the screws more or less. This makes it possible to continuously adjust the optimal contact pressure, on the one hand the mask tape seals the tape liquid-tight and on the other hand the friction between the tape and the mask tape with the carrier and the pressing elements is kept so low that the drive requires only little force.
- the carrier preferably consists of a wide bar and two narrow bars which are fastened lengthways to the wide bar, so that an elongated channel is formed by the three bars, which the band and the mask band leads on three sides.
- the carrier can be adapted to tapes of different widths by adapting the distance between the two narrow strips to the width of the tape to be coated.
- the narrow strips are also provided as spacers for installation between the carrier and the pressing elements, so that they do not bend due to the mutual bracing.
- the strip 1 to be coated is received by a guide consisting of a wide strip 11, spacers 12, which are designed as narrow strips 12, and a pressing element 8.
- a mask tape 5, 5 ' is performed, each of these mask bands 5, 5 'is provided with a drive 7, which makes it possible to move the mask bands 5, 5' independently of the band movement relative to the latter.
- the selective, continuous, galvanic coating of the strip 1 takes place in that the electrolyte on the guide with the openings 9 therein, which were not shown in FIG. 1 due to the clarity, through electrolyte outlet openings 3 which are arranged opposite the guide are sprayed.
- the electrolyte is collected in a container and pumped back to the electrolyte outlet openings 3 by a pump 4.
- FIG 2 shows the schematic structure of the mask bands 5, 5 '.
- the mask straps 5, 5 ' are preferably made of a polyester resin with a smooth, hydrophobic surface. They have one or more rows of holes 6 which run in the longitudinal direction of the mask bands 5, 5 '.
- the holes 6 of the masking tape 5, 5 'select in connection with the openings 9, which are formed individually or collectively by the carrier 2 and / or by the pressing elements 8 parallel to the carrier, the areas of the tape 1 to be coated, by opposing the Electrolyte outlet openings 3 are arranged and have an overlap with the openings 9, so that the electrolyte can reach the belt 1 unhindered.
- FIG 3 shows the band 1 which is located between the two mask bands 5, 5 ', which in turn is padded 13 are included.
- This bundle of tape 1, masking tapes 5, 5 'and padding 13 is located in a longitudinal channel through the carrier 2, consisting of a wide strip 11, two spacers 12, which are two narrow strips 12, and a pressing element 8 , which are detachably connected by the screw connections 10, is limited. Openings 9 which expand in a funnel shape can be seen in the wide strip 11 of the carrier 2 and in the pressing element 8.
- the electrolyte outlet openings 3 are arranged through which the electrolyte is sprayed onto the carrier 2 and / or the pressing element 8 and through the openings 9 to the mask tape 5, 5 ', through which he, if there is a hole 6th until it reaches volume 1.
- the galvanic deposition takes place there on the surface of the strip 1.
- the separated electrolyte is replaced by the movement of the band 1 and the mask bands 5, 5 'by an unused electrolyte, there is no depletion zone.
- the invention is suitable for the production of selectively coated metal strips which are further processed as semi-finished products for the production of electrical contacts.
Abstract
Description
Die Erfindung geht aus von einer Vorrichtung zur selektiven, fortlaufenden, galvanischen Beschichtung eines Bandes mit einem Träger, welcher das Band in Längsrichtung führt, wobei diesem gegenüber Elektrolytaustrittsöffnungen angeordnet sind, durch die der durch eine Pumpe geförderte Elektrolyt auf das durch ein Maskenband abgedeckte Band gesprüht wird, und das Maskenband mit mindestens einer Reihe von Löchern versehen ist und das Band an den Träger drückt und die für das Band einen Antrieb hat, der eine Relativbewegung des Bandes gegenüber dem Maskenband bewirkt.The invention is based on a device for the selective, continuous, galvanic coating of a strip with a carrier which guides the strip in the longitudinal direction, the latter being arranged opposite electrolyte outlet openings through which the electrolyte conveyed by a pump is sprayed onto the strip covered by a masking strip and the masking tape is provided with at least one row of holes and presses the tape against the carrier and which has a drive for the tape which causes a relative movement of the tape relative to the masking tape.
Solche Vorrichtungen sind bekannt aus der US-PS 4,431,500. Bei dieser bekannten Vorrichtung wird das selektiv zu beschichtende Band auf einem Rad geführt und mit Hilfe eines unbeweglichen Maskenbandes fest an dieses Rad gedrückt. Dieses Maskenband ist mit einer oder mehreren Reihen von Löchern versehen und schließt bis auf die Löcher das zu beschichtende Band flüssigkeitsdicht ab. Kreisbogenförmig um das Rad mit dem daraufliegenden Band und dem Maskenband ist eine Reihe von Elektrolytzuführöffnungen angeordnet, durch die der Elektrolyt mit Druck auf das Maskenband und die zugänglichen Bereiche des darunterliegenden Bandes gesprüht wird. Durch die Relativbewegung zwischen Band und Maskenband wird eine sich andernfalls an der Bandoberfläche ausbildende und die elektrolytische Abscheidung behindernde Verarmungsschicht verhindert.Such devices are known from US Pat. No. 4,431,500. In this known device, the strip to be selectively coated is guided on a wheel and pressed firmly against this wheel with the aid of an immovable masking strip. This masking tape is provided with one or more rows of holes and, except for the holes, closes the tape to be coated in a liquid-tight manner. A series of electrolyte supply openings are arranged in a circular arc around the wheel with the band lying thereon and the mask band, through which the electrolyte presses against the mask band and spraying the accessible areas of the underlying tape. The relative movement between the band and the mask band prevents a depletion layer that otherwise forms on the band surface and hinders the electrolytic deposition.
Bei dieser Vorrichtung ist es wegen der Führung des Bandes auf einem Rad nicht möglich, das Band in einem Vorgang beidseitig selektiv zu beschichten. Vorrichtungen mit geraden Trägern zur Führung eines selektiv galvanisch zu beschichtenden Bandes sind aus der DE-32 12 152-C2 und der W0-87/02076 bekannt. Auch die DE-32 12 152-C2 ermöglicht kein beidseitiges, selektives, fortlaufendes, galvanisches Beschichten eines Bandes, da das Anpressen der Maskenbänder auf das zu beschichtende Band durch magnetische Anziehung der ferromagnetisch ausgebildeten Maskenbänder durch im Träger angeordnete Magnete erreicht wird. Deshalb ist die auf dem Träger liegende Rückseite des zu beschichtenden Bandes nicht zugänglich.In this device, because the tape is guided on a wheel, it is not possible to selectively coat the tape on both sides in one operation. Devices with straight supports for guiding a strip to be selectively electroplated are known from DE-32 12 152-C2 and W0-87 / 02076. DE-32 12 152-C2 also does not allow selective, continuous, galvanic coating of a tape on both sides, since the mask tapes are pressed onto the tape to be coated by magnetic attraction of the ferromagnetic mask tapes by magnets arranged in the carrier. Therefore, the back of the tape to be coated is not accessible.
Durch den synchronen Lauf zwischen dem zu beschichtenden Band und dem Maskenband bildet sich eine die Abscheidung behindernde Verarmungszone an der Oberfläche des Bandes aus; diese Vorrichtung gehört somit einer anderen Gattung an.Due to the synchronous run between the band to be coated and the mask band, a depletion zone preventing the deposition is formed on the surface of the band; this device therefore belongs to a different genus.
Die Vorrichtung nach der W0-87/02076 weist auch einen geradlinigen Träger auf. Der Elektrolyt wird über ein poröses Band zugeführt, das sich relativ zum zu beschichtenden Band bewegt, dem Band anliegt und durch seine Breite und Position zum Band den zu beschichtenden Bereich festlegt. Dies gelingt jedoch nur für vorgestanzte Bänder, da sich der Abrieb des Bandes in den Poren des porösen Bandes festsetzt, sie verstopft, dort galvanisiert wird und die effektive Fläche des porösen Bandes verkleinert. Nur durch die Verwendung von vorgestanzten Bändern kann in den Ausschnitten des Bandes der Elektrolytstrom die abgeriebenen Partikel aus dem porösen Band herausspülen. Dieses notwendige Durchspülen des porösen Bandes mit Elektrolyt durch die ausgestanzten Zwischenräume des zu beschichtenden Bandes ist bei der Verwendung eines durchgängigen, nicht vorgestanzten Bandes unmöglich, es wäre auch schwerlich möglich, wenn das Band gleichzeitig beidseitig beschichtet werden sollte.The device according to W0-87 / 02076 also has a rectilinear support. The electrolyte is supplied via a porous belt, which moves relative to the belt to be coated, lies against the belt and through its width and position defines the area to be coated for the tape. However, this is only possible for pre-punched tapes, since the abrasion of the tape settles in the pores of the porous tape, clogs it, is galvanized there and reduces the effective area of the porous tape. Only through the use of pre-punched strips can the electrolyte flow in the cutouts of the strip flush the abraded particles out of the porous strip. This necessary flushing of the porous tape with electrolyte through the punched-out spaces of the tape to be coated is impossible when using a continuous tape that has not been pre-punched. It would also be difficult if the tape were to be coated on both sides at the same time.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, die es ermöglicht, in einem Vorgang beliebige Bänder sowohl ein- als auch beidseitig selektiv galvanisch zu beschichten, ohne dass sich an der Bandoberfläche im Elektrolyt eine die Abscheidung behindernde Verarmungszone bildet.The invention has for its object to provide a device of the type mentioned, which makes it possible to selectively coat any strips both on one side and on both sides in a selective process, without forming a depletion zone which hinders the deposition in the electrolyte .
Gemäß der vorliegenden Erfindung ist die Aufgabe gelöst durch eine Vorrichtung mit den im Anspruch 1 angegebenen Merkmalen. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.According to the present invention, the object is achieved by a device having the features specified in
Bei dieser Erfindung ist der erste Schritt zur beidseitigen Beschichtung dadurch getan, dass der Träger, dessen Aufgabe es ist, das Maskenband mit dem darunterliegenden zu beschichtenden Band zu führen, geradlinig ausgebildet ist. Das Maskenband hat ein oder mehrere Reihen von Löchern. Dem Träger sind auf der Seite des Bandes und des Maskenbandes ein oder mehrere langgestreckte, zum Träger parallele Andrückelemente zugeordnet, die das Maskenband flüssigkeitsdicht auf das Band und dieses auf den Träger drücken. Die Andrückelemente bilden einzeln oder gemeinsam ein oder mehrere Öffnungen, die sich zumindest zeitweise mit den Löchern des darunterliegenden Maskenbandes überlappen und somit einen Durchgang durch das Maskenband auf das Band freigeben. Gegenüber der oder den Öffnungen, die durch die Andrückelemente gebildet werden, sind Elektrolytaustrittsöffnungen angeordnet, durch die der durch eine Pumpe geförderte Elektrolyt auf das Band gesprüht wird, wo die Löcher des Maskenbandes und der Andrückelemente einen Überlapp besitzen. Der Elektrolyt passiert die Anode, die vorzugsweise um die Elektrolytaustrittsöffnungen herum angeordnet ist, und trifft dann auf das kathodisch gepolte Band, auf dem dann das im Elektrolyt gelöste Metall selektiv galvanisch abgeschieden wird. Dabei bildet sich im Elektrolyten im Abscheidungsbereich keine Verarmungszone, die die weitere Abscheidung behindert, weil das Band mit einem Antrieb versehen ist, der das Band unter dem Maskenband hindurchzieht, wodurch die Grenzschicht des Elektrolyten von den Rändern der Löcher im Maskenband fortlaufend abgestreift wird, so dass es gar nicht erst zu einer Verarmung der Grenzschicht kommen kann.In this invention, the first step for coating on both sides is done in that the carrier, whose job it is to coat the masking tape with the one underneath To guide tape is straight. The mask tape has one or more rows of holes. On the side of the band and the mask band, the carrier is assigned one or more elongate pressing elements which are parallel to the carrier and press the mask band onto the band in a liquid-tight manner and this on the carrier. The pressing elements individually or collectively form one or more openings, which at least temporarily overlap with the holes in the masking band underneath and thus open a passage through the masking band onto the band. Opposite the opening or openings formed by the pressing elements, electrolyte outlet openings are arranged, through which the electrolyte conveyed by a pump is sprayed onto the tape, where the holes of the masking tape and the pressing elements have an overlap. The electrolyte passes the anode, which is preferably arranged around the electrolyte outlet openings, and then hits the cathodically polarized band, on which the metal dissolved in the electrolyte is then selectively electrodeposited. There is no depletion zone in the electrolyte in the deposition area, which hinders further deposition, because the band is provided with a drive which pulls the band under the mask band, as a result of which the boundary layer of the electrolyte is continuously stripped from the edges of the holes in the mask band, so that the boundary layer cannot become impoverished in the first place.
Weil der Träger geradlinig ausgebildet ist und das zu beschichtende Band - anders als beim Gegenstand der DE-PS 32 12 152 - nicht durch an der Rückseite des Trägers angeordnete Magnete zur Anlage am Träger gebracht wird, sondern durch nicht-magnetische Andrückelemente, welche auf derselben Seite des Trägers angeordnet sind wie das zu beschichtende Band, kann der Träger ebenfalls Öffnungen haben, durch die Elektrolytflüssigkeit auf die Rückseite des Bandes gebracht und dieses somit beidseitig selektiv beschichtet werden kann. Dazu ordnet man den Öffnungen des Trägers gegenüber zusätzliche Elektrolytaustrittsöffnungen an, sowie zwischen dem Träger und dem Band zusätzlich ein Maskenband, das ebenso wie das Maskenband auf der anderen Seite mit mindestens einer Reihe von Löchern versehen ist, die einen Überlapp mit den Öffnungen im Träger haben. Beim beidseitigen Beschichten übernimmt also der Träger zugleich die Funktion eines Andrückelements und umgekehrt.Because the carrier is straight and the tape to be coated - unlike the subject of DE-PS 32 12 152 - is not brought into contact with the carrier by magnets arranged on the back of the carrier, but by non-magnetic pressing elements which act on the same Are arranged side of the carrier like the band to be coated, the carrier can also have openings through which electrolyte liquid can be brought to the back of the band and can thus be selectively coated on both sides. For this purpose, one arranges the openings of the carrier opposite to additional electrolyte outlet openings, and between the carrier and the band additionally a masking band, which, like the masking band on the other side, is provided with at least one row of holes which overlap with the openings in the carrier . When coating on both sides, the carrier also acts as a pressing element and vice versa.
Vorzugsweise versieht man das Maskenband ebenfalls mit einem Antrieb, der es ermöglicht, das Maskenband in Gegenrichtung zum Band zu betreiben, so dass eine höhere Relativgeschwindigkeit des Maskenbandes gegenüber dem zu beschichtenden Band erreicht wird, was ein rascheres Abstreifen der Verarmungszone und damit eine höhere Abscheidegeschwindigkeit zur Folge hat.The masking tape is preferably also provided with a drive which makes it possible to operate the masking tape in the opposite direction to the tape, so that a higher relative speed of the masking tape compared to the tape to be coated is achieved, which means that the depletion zone is wiped off more quickly and thus a higher deposition speed Consequence.
Vorzugsweise wird das Maskenband breiter als das Band gewählt, so dass es möglich ist, die Öffnungen im Maskenband und in bzw. zwischen den Andrückelementen in den Randbereich des Bandes zu verlegen und das Band auch am Rand zu beschichten.The mask band is preferably chosen to be wider than the band, so that it is possible to open the openings in the mask band and to lay in or between the pressing elements in the edge area of the tape and to coat the tape also at the edge.
Das Maskenband kann endlos sein, wodurch ein unterbrechungsfreies Arbeiten möglich wird. Vorzugsweise werden das Band und das Maskenband nur in der Plattierzone in engem Kontakt geführt, um die Reibung zwischen dem Maskenband und dem zu beschichtenden Band, als auch die Kraft zur Überwindung der Reibung klein zu halten und ein Verziehen der Bänder zu verhindern.The masking tape can be endless, which enables uninterrupted work. The band and the mask band are preferably guided in close contact only in the plating zone in order to keep the friction between the mask band and the band to be coated as well as the force for overcoming the friction small and to prevent warping of the bands.
Vorteilhafterweise ist jeder einzelnen Öffnung, die durch das oder die Andrückelemente oder den Träger gebildet ist, eine Elektrolytzuführöffnung zugeordnet, was eine optimierte Zuführung des Elektrolyten zu jeder einzelnen Öffnung erlaubt.Advantageously, an individual electrolyte supply opening is assigned to each individual opening, which is formed by the pressing element or the carrier, which allows an optimized supply of the electrolyte to each individual opening.
Beim Abscheiden des Metalls in schmalen Streifen, die einen geringen Abstand voneinander haben, empfiehlt es sich hingegen, nahe beeinander liegenden Öffnungen eine gemeinsame Elektrolytzuführöffnung zuzuordnen, damit diese nicht zu gedrängt nebeneinander liegen; trotzdem ist eine genügende Elektrolytversorgung gewährleistet.When depositing the metal in narrow strips that are a short distance apart, on the other hand, it is advisable to allocate a common electrolyte feed opening so that they are not too crowded; nevertheless a sufficient supply of electrolyte is guaranteed.
Vorteilhafterweise sind die Öffnungen, die durch die Andrückelemente bzw. den Träger gebildet sind, so ausgebildet, dass sie sich in Richtung der Elektrolytzuführöffnungen trichterförmig erweitern, was die zielgenaue Zuführung des Elektrolyten zum Band bzw. zum Maskenband wesentlich erleichtert. Somit muss die Justierung der Elektrolytzuführöffnung gegenüber den Öffnungen nicht exakt erfolgen.The openings which are formed by the pressing elements or the carrier are advantageously designed such that they are funnel-shaped in the direction of the electrolyte supply openings expand, which makes it much easier to precisely feed the electrolyte to the band or mask band. This means that the electrolyte feed opening does not have to be adjusted exactly in relation to the openings.
Vorzugsweise werden die Berührflächen des Trägers und der Andrückelemente mit dem Band bzw. dem Maskenband gepolstert. Diese Polsterung erfolgt z.B. mit einem weichen Schaumstoff, vorzugsweise mit einem Moosgummi.The contact surfaces of the carrier and the pressing elements are preferably padded with the band or the mask band. This padding is e.g. with a soft foam, preferably with a foam rubber.
Durch die Polsterung gelingt es, das Maskenband flüssigkeitsdicht flächig gegen das Band zu pressen, wobei bei veränderlichen Dicken der Bänder oder sogar beim Auftreten eines Knicks in den Bändern keine Probleme auftreten. Somit verringert man die Gefahr eines Abreißen oder Einreißen des Maskenbandes oder des zu beschichtenden Bandes.The padding makes it possible to press the masking tape flat against the tape in a liquid-tight manner, with no problems occurring in the case of variable thicknesses of the tapes or even when a kink occurs in the tapes. This reduces the risk of tearing or tearing off the masking tape or the tape to be coated.
Vorteilhafterweise bilden die Andrückelemente bzw. der Träger für jede Reihe von Löcher im Maskenband eine Öffnung bzw. eine Reihe von Öffnungen in Banddurchführrichtung, so dass die Abstreifung der Elektrolytverarmungszone an den Rändern der Löcher im Maskenband als auch an den Rändern der Löcher der Öffnungen verbessert wird.Advantageously, the pressing elements or the carrier form an opening or a series of openings in the band passage direction for each row of holes in the mask band, so that the stripping of the electrolyte depletion zone at the edges of the holes in the mask band as well as at the edges of the holes of the openings is improved .
Vorzugsweise bilden die Andrückelemente oder der Träger eine oder mehrere schlitzförmige Öffnungen, quer zur Banddurchführungsrichtung verlaufend, die die Zuführung von Elektrolyt gleichzeitig zu mehreren Reihen von Löchern im Maskenband ermöglichen. Dies ermöglicht mit einer großflächigen Elektrolytzuführöffnung und einer quer zur Banddurchführrichtung über die ganze Bandbreite verlaufenden, schlitzförmigen Öffnung, die ganze Bandseite selektiv zu beschichten.Preferably, the pressing elements or the carrier form one or more slit-shaped openings, which run transversely to the direction of the band passage, which enable the supply of electrolyte to several rows of holes in the mask band at the same time. This is made possible with a large-area electrolyte feed opening and a slit-shaped opening that runs across the entire width of the strip, to selectively coat the entire side of the strip.
Vorteilhafterweise sind das oder die Andrückelemente vom Träger lösbar. Dieses ermöglicht eine vereinfachte Einbringung des Bandes und des Maskenbandes in die aus Träger und Andrückelementen bestehende Einheit. Möglichkeiten der Verbindung der Andrückelemente mit dem Träger sind Verspannen oder eine Verbindung durch Nut und Feder.The pressing element or elements can advantageously be detached from the carrier. This enables the band and the mask band to be introduced more easily into the unit consisting of carrier and pressing elements. Possibilities of connecting the pressing elements to the carrier are bracing or a tongue and groove connection.
Vorteilhaft sind Verbindungen der Andrückelemente mit dem Träger durch Verschraubung, da durch stärkeres oder schwächeres Zudrehen der Schrauben der Andruck der Andrückelemente auf das bzw. die Maskenbänder und das zu beschichtende Band auf den Träger eingestellt werden kann. Dadurch wird es möglich, den optimalen Anpreßdruck stufenlos einzustellen, bei dem einerseits das Maskenband das Band flüssigkeitsdicht abschließt und andererseits die Reibung zwischen dem Band und dem Maskenband mit dem Träger und den Andrückelementen so gering gehalten wird, dass der Antrieb nur wenig Kraft erfordert.Connections of the pressing elements to the carrier by screwing are advantageous, since the pressure of the pressing elements on the mask mask tape and mask tape and the tape to be coated can be adjusted on the carrier by tightening the screws more or less. This makes it possible to continuously adjust the optimal contact pressure, on the one hand the mask tape seals the tape liquid-tight and on the other hand the friction between the tape and the mask tape with the carrier and the pressing elements is kept so low that the drive requires only little force.
Vorzugsweise besteht der Träger aus einer breiten Leiste und zwei schmalen Leisten, die längsseits an der breiten Leiste befestigt werden, so dass durch die drei Leisten ein länglicher Kanal gebildet wird, der das Band und das Maskenband dreiseitig führt. Durch diese Ausbildung kann der Träger an unterschiedlich breite Bänder angepaßt werden indem der Abstand der beiden schmalen Leisten der Breite des zu beschichtenden Bandes angepaßt wird.The carrier preferably consists of a wide bar and two narrow bars which are fastened lengthways to the wide bar, so that an elongated channel is formed by the three bars, which the band and the mask band leads on three sides. With this design, the carrier can be adapted to tapes of different widths by adapting the distance between the two narrow strips to the width of the tape to be coated.
Vorzugsweise sind die schmalen Leisten zugleich als Distanzstücke zum Einbau zwischen den Träger und die Andrückelemente vorgesehen, so dass diese sich durch das gegenseitige Verspannen nicht verbiegen.Preferably, the narrow strips are also provided as spacers for installation between the carrier and the pressing elements, so that they do not bend due to the mutual bracing.
Ein Ausführungsbeispiel der Erfindung ist in den schematischen Zeichnungen dargestellt.
Figur 1- zeigt die Vorrichtung in einem Längsschnitt.
Figur 2- zeigt das Maskenband in einer Draufsicht.
Figur 3- zeigt in einem Schnitt den Kern der Vorrichtung bestehend aus Elektrolytzuführöffnungen, der Bandführung und den Bändern.
- Figure 1
- shows the device in a longitudinal section.
- Figure 2
- shows the mask tape in a plan view.
- Figure 3
- shows in a section the core of the device consisting of electrolyte supply openings, the tape guide and the tapes.
In der Vorrichtung wird das zu beschichtende Band 1 von einer Führung aufgenommen, die aus einer breiten Leiste 11, aus Distanzstücken 12, die als schmale Leisten 12 ausgebildet sind, und aus einem Andrückelement 8 besteht. Auf der Vorder- und Rückseite des Bandes 1 wird je ein Maskenband 5, 5′ geführt, jedes dieser Maskenbänder 5, 5' ist mit einem Antrieb 7 versehen, der es ermöglicht die Maskenbänder 5, 5' unabhängig von der Bandbewegung relativ zu dieser zu bewegen. Im Bereich der Führung erfolgt die selektive, fortlaufende, galvanische Beschichtung des Bandes 1, indem durch Elektrolytaustrittsöffnungen 3, die der Führung gegenüber angeordnet sind, der Elektrolyt auf die Führung mit den darin befindlichen Öffnungen 9, die in Figur 1 aufgrund der Übersichtlichkeit nicht eingezeichnet worden sind, gesprüht wird. Der Elektrolyt wird in einem Behälter gesammelt und durch eine Pumpe 4 wieder zu den Elektrolytaustrittsöffnungen 3 gefördert.In the device, the
Figur 2 zeigt den schematischen Aufbau der Maskenbänder 5, 5′. Die Maskenbänder 5, 5′ sind vorzugsweise aus einem Polyesterharz mit glatter, hydrophober Oberfläche hergestellt. Sie weisen eine oder mehrere Reihen von Löchern 6 auf, die in Längsrichtung der Maskenbänder 5, 5′ verlaufen. Die Löcher 6 des Maskenbandes 5, 5′ selektieren in Verbindung mit den Öffnungen 9, die einzeln oder gemeinsam durch den Träger 2 und/oder durch die zum Träger parallelen Andrückelemente 8 gebildet werden, die zu beschichtenden Bereiche des Bandes 1, indem sie gegenüber den Elektrolytaustrittsöffnungen 3 angeordnet sind und einen Überlapp mit den Öffnungen 9 haben, so dass der Elektrolyt ungehindert auf das Band 1 gelangen kann.Figure 2 shows the schematic structure of the
Figur 3 zeigt das Band 1 das sich zwischen den beiden Maskenbändern 5, 5′ befindet, die selbst wiederum von einer Polsterung 13 eingeschlossen sind. Dieses Bündel aus Band 1, Maskenbändern 5, 5′ und Polsterung 13 befindet sich in einem Längskanal, der durch den Träger 2, bestehend aus einer breiten Leiste 11, aus zwei Distanzstücken 12, die zwei schmale Leisten 12 sind, und aus einem Andrückelement 8, die durch die Verschraubungen 10 lösbar miteinander verbunden sind, begrenzt ist. In der breiten Leiste 11 des Trägers 2 und in dem Andrückelement 8 sind Öffnungen 9 zu erkennen, die sich trichterförmig erweitern. Gegenüber diesen Öffnungen 9 sind die Elektrolytaustrittsöffnungen 3 angeordnet, durch die der Elektrolyt auf den Träger 2 und/oder das Andrückelement 8 gesprüht wird und durch die Öffnungen 9 bis auf das Maskenband 5, 5′ gelangt, durch welches er, falls dort ein Loch 6 ist, bis auf das Band 1 gelangt. Dort erfolgt auf der Oberfläche des Bandes 1 die galvanische Abscheidung. Der abgeschiedene Elektrolyt wird durch die Bewegung des Bandes 1 und der Maskenbänder 5, 5′ durch einen unverbrauchten Elektrolyten ersetzt, es entsteht keine Verarmungszone.Figure 3 shows the
Die Erfindung eignet sich für die Herstellung von selektiv beschichteten Metallbändern, die als Halbzeuge für die Herstellung von elektrischen Kontakten weiterverarbeitet werden.The invention is suitable for the production of selectively coated metal strips which are further processed as semi-finished products for the production of electrical contacts.
Claims (15)
- An apparatus for a continuous selective electrodeposition on a strip (1), comprising a carrier (2), which guides the strip (1) in its longitudinal direction, and electrolyte discharge orifices (3), which are associated with and face the carrier and through which the electrolyte discharged by a pump (4) is sprayed onto the strip (1), which is covered by a mask tape (5), which is provided with at least one row of holes (6) and urges the strip (1) against the carrier (2),
wherein drive means (7) are provided for moving the strip (1) relative to the mask tape (5),
characterized in that the carrier (2) is straight, one or more elongate pressure-applying elements (8), which are parallel to the carrier (2), are associated with the carrier (2) and urge the mask tape (5) against the strip (1) and individually or jointly define openings (9), which face the electrolyte discharge orifices (3) and overlap the holes (6) in the mask tape (5). - An apparatus according to claim 1,
characterized in that the mask tape (5) is wider than the tape (1). - An apparatus according to claim 1 or 2,
characterized in that the mask tape (5) is endless. - An apparatus according to claim 1, 2 or 3,
characterized in that separate drive means (7) are provided for the mask tape (5) and that the mask tape (5) and the strip (1) are driven in mutually opposite directions. - An apparatus according to any of the preceding claims,
characterized in that an electrode discharge orifice (3) is associated with each opening (9) in one of the pressure-applying elements (8). - An apparatus according to any of the claims 1 - 4,
characterized in that a common electrolyte discharge orifice (3) is associated with a plurality of openings (9) defined by the pressure-applying elements (8). - An apparatus according to any of the preceding claims,
characterized in that the openings (9) are designed to flare like a funnel toward the electrolyte discharge orifices (3). - An apparatus according to any of the preceding claims,
characterized in that the surfaces with which the carrier (2) and the pressure-applying elements (8) contact the strip (1) and the mask tape (5), respectively, are cushioned. - An apparatus according to any of the preceding claims,
characterized in that the pressure-applying elements (9) define an opening (9) or a row of openings (9), which row extends in the direction of travel of the strip, for each row of holes (6) in the mask tape (5). - An apparatus according to any of the claims 1 - 8 ,
characterized in that the pressure-applying elements (8) define one or more slot-shaped openings (9), which extend transversely to the direction of travel of the strip and are associated with a plurality of rows of holes (6) in the mask tape (5). - An apparatus according to any of the preceding claims,
characterized in that the pressure-applying elements (8) are detachable from the carrier (2). - An apparatus according to any of the preceding claims,
characterized in that the carrier (2) and the pressure-applying elements (8) are interconnected by screw means (10). - An apparatus according to any of the preceding claims,
characterized in that the carrier (2) consists of a wide bar (11) and two narrow bars (12), which extend along the longitudinal sides of the wide bar (11) to define an elongate passage for guiding the strip (1) and the mask tape (5). - An apparatus according to any of the preceding claims,
characterized in that the carrier (2) is provided with openings (9), which face further electrolyte discharge orifices, and that an additional mask tape (5′) is provided between the carrier (2) and the strip (1) and has at/least one row of holes (6), which overlap the openings (9) in the carrier, so that the strip (1) to be coated is covered by the two mask tapes (5, 5′) on both sides. - An apparatus according to any of the preceding claims,
characterized in that spacers (12) are provided, which are to be inserted between the carrier (2) and the pressure-applying elements (8).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4019643A DE4019643A1 (en) | 1990-06-20 | 1990-06-20 | DEVICE FOR SELECTIVE, CONTINUOUS, GALVANIC COATING OF A TAPE |
| DE4019643 | 1990-06-20 | ||
| PCT/EP1991/001124 WO1991019835A1 (en) | 1990-06-20 | 1991-06-17 | Device for the continuous, selective galvanizing of a strip of material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0533778A1 EP0533778A1 (en) | 1993-03-31 |
| EP0533778B1 true EP0533778B1 (en) | 1994-08-10 |
Family
ID=6408726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91911231A Expired - Lifetime EP0533778B1 (en) | 1990-06-20 | 1991-06-17 | Device for the continuous, selective galvanizing of a strip of material |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5389220A (en) |
| EP (1) | EP0533778B1 (en) |
| AT (1) | ATE109840T1 (en) |
| DE (2) | DE4019643A1 (en) |
| DK (1) | DK0533778T3 (en) |
| WO (1) | WO1991019835A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4318273C2 (en) * | 1993-06-03 | 1999-04-29 | Dietrich Gunter | Device for color coating profile bars with cover template |
| DE4436071C2 (en) * | 1994-07-28 | 1996-09-05 | Duerrwaechter E Dr Doduco | Process for gilding band-shaped semi-finished products, in particular for lead frames, and lead frames gold-plated according to the process |
| US6176985B1 (en) | 1998-10-23 | 2001-01-23 | International Business Machines Corporation | Laminated electroplating rack and connection system for optimized plating |
| US8734421B2 (en) * | 2003-06-30 | 2014-05-27 | Johnson & Johnson Consumer Companies, Inc. | Methods of treating pores on the skin with electricity |
| DE102004022297A1 (en) * | 2004-05-04 | 2005-12-01 | OTB Oberflächentechnik in Berlin GmbH & Co. | Method and system for selective coating or etching of surfaces |
| CN104473966A (en) * | 2007-09-28 | 2015-04-01 | 强生消费者公司 | Electricity-generating particulates and the use thereof |
| US20100082088A1 (en) * | 2008-08-27 | 2010-04-01 | Ali Fassih | Treatment of sweating and hyperhydrosis |
| US20120089232A1 (en) | 2009-03-27 | 2012-04-12 | Jennifer Hagyoung Kang Choi | Medical devices with galvanic particulates |
| KR20110091461A (en) * | 2010-02-05 | 2011-08-11 | 존슨 앤드 존슨 컨수머 캄파니즈, 인코포레이티드 | Lip compositions comprising galvanic particulates |
| EP2542209A1 (en) * | 2010-03-01 | 2013-01-09 | Johnson & Johnson Consumer Companies, Inc. | Skin care composition having desirable bulk color |
| US20110236491A1 (en) * | 2010-03-25 | 2011-09-29 | Jeannette Chantalat | Topical anti-inflammatory composition |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3723383A (en) * | 1971-07-26 | 1973-03-27 | Universal Oil Prod Co | Novel flame retardant compositions of matter |
| US4431500A (en) * | 1981-12-15 | 1984-02-14 | Vanguard Research Associates, Inc. | Selective electroplating apparatus |
| DE3212152C2 (en) * | 1982-04-01 | 1985-01-17 | Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim | Device for the selective electroplating of a strip |
| FR2530673A1 (en) * | 1982-07-23 | 1984-01-27 | Dynalyse | Machine for producing electroplating deposits continuously on a strip. |
| US4597845A (en) * | 1984-09-25 | 1986-07-01 | Robbins & Craig Welding & Mfg. Co. | Continuous contact plating apparatus |
| US4582583A (en) * | 1984-12-07 | 1986-04-15 | National Semiconductor Corporation | Continuous stripe plating apparatus |
| GB2214930A (en) * | 1988-02-11 | 1989-09-13 | Twickenham Plating & Enamellin | Mask for use in electriplating on elongate substrate |
-
1990
- 1990-06-20 DE DE4019643A patent/DE4019643A1/en not_active Withdrawn
-
1991
- 1991-06-17 EP EP91911231A patent/EP0533778B1/en not_active Expired - Lifetime
- 1991-06-17 WO PCT/EP1991/001124 patent/WO1991019835A1/en active IP Right Grant
- 1991-06-17 AT AT91911231T patent/ATE109840T1/en not_active IP Right Cessation
- 1991-06-17 DK DK91911231.8T patent/DK0533778T3/en active
- 1991-06-17 US US07/949,805 patent/US5389220A/en not_active Expired - Lifetime
- 1991-06-17 DE DE59102517T patent/DE59102517D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO1991019835A1 (en) | 1991-12-26 |
| ATE109840T1 (en) | 1994-08-15 |
| DE4019643A1 (en) | 1992-01-09 |
| DK0533778T3 (en) | 1995-01-09 |
| EP0533778A1 (en) | 1993-03-31 |
| US5389220A (en) | 1995-02-14 |
| DE59102517D1 (en) | 1994-09-15 |
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