EP2119814A1 - Dialysis cell assembly in dip coating systems - Google Patents

Dialysis cell assembly in dip coating systems Download PDF

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Publication number
EP2119814A1
EP2119814A1 EP08009158A EP08009158A EP2119814A1 EP 2119814 A1 EP2119814 A1 EP 2119814A1 EP 08009158 A EP08009158 A EP 08009158A EP 08009158 A EP08009158 A EP 08009158A EP 2119814 A1 EP2119814 A1 EP 2119814A1
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EP
European Patent Office
Prior art keywords
dialysis
cells
dialysis cells
electrophoresis bath
frame
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Application number
EP08009158A
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German (de)
French (fr)
Inventor
Ingo Krautmacher
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.)
Ekk Elektro-Kohle-Koln & Co KG GmbH
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Ekk Elektro-Kohle-Koln & Co KG GmbH
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Priority to EP08009158A priority Critical patent/EP2119814A1/en
Publication of EP2119814A1 publication Critical patent/EP2119814A1/en
Withdrawn legal-status Critical Current

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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
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes

Definitions

  • electrophoretic dip coating systems in particular dip coating systems for coating or painting car bodies, the electrical current is introduced into the electrophoresis bath by dialysis cells, which are each arranged in a vertical orientation along the opposite side walls of the electrophoresis bath.
  • dialysis cells which are each arranged in a vertical orientation along the opposite side walls of the electrophoresis bath.
  • tubular dialysis cells are used.
  • the bodies to be coated are immersed on a hanging conveyor suspended in the electrophoresis bath and moved along the same through this.
  • Fig. 1 of the drawings shows such a conventional arrangement according to the prior art in a schematic representation.
  • rows of vertically oriented Rohrdialysezellen 2 are arranged.
  • a car body K shown schematically is conveyed through the tank in operation (suspension conveyor omitted).
  • the tube dialysis cells 2 are connected as an anode, and the car body K is connected as a cathode.
  • the object of the invention in contrast, is to provide a new dialysis cell arrangement for dip coating systems, which optimizes the dip coating process in terms of energy efficiency and uniformity of the coating.
  • the invention proposes a horizontal, ie horizontal arrangement of the dialysis cells, namely on a support frame which, together with the dialysis cells supported thereon, results in a dialysis cell arrangement approximately in the form of a longitudinally slotted tubular body.
  • the dialysis cell assembly thus forms a tubular, open at the ends and up in the form of a longitudinal central slot cage, said slot opening allows the implementation of the hangers of the overhead conveyor.
  • Carrying out the bodies by the electrophoresis bath is preferably carried out inverted, ie with the roof down.
  • the two body side regions have a relatively small distance to the dialysis cells, while the distance of the central regions of the roof and floor areas of the body is much larger, namely a multiple.
  • the distance between the body side areas and the dialysis cells in the conventional arrangement is about 500 mm, while the distance of the roof and floor center area about 1 500 mm, that is about three times.
  • FIGS. 2 and 3 schematically show an embodiment of the invention, wherein Fig. 2 a perspective view and Fig. 3 shows a cross section.
  • each horizontally oriented dialysis cells 3 are mounted on a frame 4, which is inserted into the electrophoresis bath 1 in the inventive arrangement.
  • the dialysis cell assembly formed from the frame 4 and the dialysis cells 3 mounted thereon has the configuration of a longitudinally slotted tube and encloses, as in the cross section Fig. 3 clearly shows a guided through the electrophoresis bath car body K as a coat substantially on all sides.
  • the above lying longitudinal slot-shaped open area of the dialysis cell arrangement allows the passage of the suspension device of the suspension conveyor, by means of which the car bodies are conveyed through the electrophoresis bath.
  • both dialysis cell arrangements according to the invention have substantially the same distance from the electrophoresis cells over the entire body circumference everywhere. This results in a very uniform current distribution over the entire body surface and thus a very even coating.
  • the dialysis cell arrangement according to the invention can be adapted much more flexibly to the conditions in the various body areas. For example, in the area of the side window surfaces of the body, less anode area is required, and in the area of the door sills or the roof, more anode area is needed. In the conventional arrangement, such considerations can not be taken into account.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating Apparatus (AREA)

Abstract

The dialysis cells arrangement comprises dialysis cells (3), which are arranged in orientation corresponding to the longitudinal direction of an electrophoresis bath (1) and are mounted on a frame (4) inserted in the electrophoresis bath. The dialysis cells are formed from frame and dialysis cells and have overall configuration of a top centric longitudinal slotted tubular body. The slit area enables to guide a hook device of a hanger conveyor to convey the object to be coated through the electrophoresis bath. The dialysis cells are formed as tubular cells. The dialysis cells arrangement comprises dialysis cells (3), which are arranged in orientation corresponding to the longitudinal direction of an electrophoresis bath (1) and are mounted on a frame (4) inserted in the electrophoresis bath. The dialysis cells are formed from frame and dialysis cells and have overall configuration of a top centric longitudinal slotted tubular body. The slit area enables to guide a hook device of a hanger conveyor to convey the object to be coated through the electrophoresis bath. The dialysis cells are formed as tubular cells. The arrangement density of the dialysis cells is adapted along the peripheral of the tubular body configuration corresponding to the surface density distribution over the peripheral of the objects to be coated.

Description

Bei elektrophoretischen Tauchbeschichtungsanlagen, insbesondere Tauchlackieranlagen zum Beschichten bzw. Lackieren von Autokarosserien, erfolgt der elektrische Stromeintrag in das Elektrophorese-Bad durch Dialysezellen, die jeweils in vertikaler Orientierung entlang der gegenüberliegenden Seitenwände des Elektrophorese-Badbeckens angeordnet sind. Meist werden dabei rohrförmige Dialysezellen eingesetzt. Die zu beschichtenden Karosserien werden an einem Hängeförderer hängend in das Elektrophorese-Badbecken eingetaucht und entlang desselben durch dieses hindurch bewegt.In electrophoretic dip coating systems, in particular dip coating systems for coating or painting car bodies, the electrical current is introduced into the electrophoresis bath by dialysis cells, which are each arranged in a vertical orientation along the opposite side walls of the electrophoresis bath. Mostly tubular dialysis cells are used. The bodies to be coated are immersed on a hanging conveyor suspended in the electrophoresis bath and moved along the same through this.

Fig. 1 der Zeichnungen zeigt eine solche übliche Anordnung nach dem Stand der Technik in schematischer Darstellung. Entlang der beiden Seitenwände eines Elektrophorese-Badbeckens 1 sind Reihen vertikal orientierter Rohrdialysezellen 2 angeordnet. Eine schematisch dargestellte Autokarosserie K wird in Betrieb durch das Becken gefördert (Hängeförderer weggelassen). Dabei sind die Rohrdialysezellen 2 als Anode geschaltet, und die Autokarosserie K ist als Kathode geschaltet. Fig. 1 of the drawings shows such a conventional arrangement according to the prior art in a schematic representation. Along the two side walls of an electrophoresis bath 1 rows of vertically oriented Rohrdialysezellen 2 are arranged. A car body K shown schematically is conveyed through the tank in operation (suspension conveyor omitted). The tube dialysis cells 2 are connected as an anode, and the car body K is connected as a cathode.

Aufgabe der Erfindung ist es demgegenüber, eine neue Dialysezellenanordnung für Tauchbeschichtungsanlagen zu schaffen, die den Tauchbeschichtungsvorgang im Hinblick auf Energieeffizienz und Gleichmäßigkeit der Beschichtung optimiert.The object of the invention, in contrast, is to provide a new dialysis cell arrangement for dip coating systems, which optimizes the dip coating process in terms of energy efficiency and uniformity of the coating.

Diese Aufgabe wird erfindungsgemäß durch die im Anspruch 1 angegebene Anordnung gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the arrangement specified in claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Die Erfindung schlägt eine jeweils liegende, also horizontale Anordnung der Dialysezellen vor, und zwar an einem Tragrahmen, der zusammen mit den daran gehalterten Dialysezellen eine Dialysezellenanordnung etwa in Gestalt eines längsgeschlitzten Rohrkörpers ergibt. Die Dialysezellenanordnung bildet damit einen rohrartigen, an den Enden sowie oben in Gestalt eines längsverlaufenden mittigen Schlitzes offenen Käfig, wobei diese Schlitzöffnung die Durchführung der Hängevorrichtungen des Hängeförderers ermöglicht. Das Durchführen der Karosserien durch das Elektrophorese-Bad erfolgt dabei vorzugsweise kopfstehend, also mit dem Dach nach unten.The invention proposes a horizontal, ie horizontal arrangement of the dialysis cells, namely on a support frame which, together with the dialysis cells supported thereon, results in a dialysis cell arrangement approximately in the form of a longitudinally slotted tubular body. The dialysis cell assembly thus forms a tubular, open at the ends and up in the form of a longitudinal central slot cage, said slot opening allows the implementation of the hangers of the overhead conveyor. Carrying out the bodies by the electrophoresis bath is preferably carried out inverted, ie with the roof down.

Mit der erfindungsgemäßen Anordnung wird erreicht, dass allseitig ein etwa gleichmäßiger kurzer Abstand zwischen den Dialysezellen und der Karosserie hergestellt wird, so dass zum einen eine deutlich gleichmäßigere Beschichtungsdicke an allen Stellen der Karosserie erreicht wird, und zum anderen die eingesetzte elektrische Energie effektiver ausgenutzt wird.With the arrangement according to the invention it is achieved that an approximately uniform short distance between the dialysis cells and the body is produced on all sides, so that on the one hand a much more uniform coating thickness is achieved at all points of the body, and on the other hand, the electrical energy used is utilized more effectively.

Bei der üblichen herkömmlichen Anordnung der Dialysezellen entlang der gegenüberliegenden Eckenseitenwände, wie in Fig. 1 dargestellt, haben die beiden Karosserieseitenbereiche einen relativ kleinen Abstand zu den Dialysezellen, während der Abstand der Mittenbereiche von Dach- und Bodenbereichen der Karosserie viel größer ist, nämlich ein Mehrfaches beträgt. In der Praxis beträgt der Abstand zwischen den Karosserieseitenbereichen und den Dialysezellen bei der herkömmlichen Anordnung etwa 500 mm, während der Abstand des Dach- und Bodenmittenbereichs etwa 1 500 mm, also ungefähr das Dreifache, beträgt.In the conventional conventional arrangement of the dialysis cells along the opposite corner side walls, as in Fig. 1 shown, the two body side regions have a relatively small distance to the dialysis cells, while the distance of the central regions of the roof and floor areas of the body is much larger, namely a multiple. In practice, the distance between the body side areas and the dialysis cells in the conventional arrangement is about 500 mm, while the distance of the roof and floor center area about 1 500 mm, that is about three times.

Die Fig. 2 und 3 zeigen schematisch ein Ausführungsbeispiel der Erfindung, wobei Fig. 2 eine perspektivische Darstellung und Fig. 3 einen Querschnitt zeigt.The FIGS. 2 and 3 schematically show an embodiment of the invention, wherein Fig. 2 a perspective view and Fig. 3 shows a cross section.

Wie man sieht, sind bei der erfindungsgemäßen Anordnung jeweils horizontal orientierte Dialysezellen 3 an einem Rahmen 4 montiert, der in das Elektrophorese-Badbecken 1 eingesetzt ist. Die aus dem Rahmen 4 und den daran montierten Dialysezellen 3 gebildete Dialysezellenanordnung hat die Konfiguration eines oben längs geschlitzten Rohres und umschließt, wie der Querschnitt nach Fig. 3 anschaulich zeigt, eine durch das Elektrophorese-Bad geführte Autokarosserie K wie einen Mantel im wesentlichen allseitig. Der oben liegende längsschlitzförmige offene Bereich der Dialysezellenanordnung ermöglicht das Hindurchbewegen der Hängevorrichtung des Hängeförderers, mittels welchem die Autokarosserien durch das Elektrophorese-Bad gefördert werden.As can be seen, each horizontally oriented dialysis cells 3 are mounted on a frame 4, which is inserted into the electrophoresis bath 1 in the inventive arrangement. The dialysis cell assembly formed from the frame 4 and the dialysis cells 3 mounted thereon has the configuration of a longitudinally slotted tube and encloses, as in the cross section Fig. 3 clearly shows a guided through the electrophoresis bath car body K as a coat substantially on all sides. The above lying longitudinal slot-shaped open area of the dialysis cell arrangement allows the passage of the suspension device of the suspension conveyor, by means of which the car bodies are conveyed through the electrophoresis bath.

Wie man aus Fig. 3 auch leicht erkennt, haben beide erfindungsgemäßen Dialysezellenanordnungen, die Seitenbereiche, der Bodenbereich und der Dachbereich der Karosserie K über den gesamten Karosserieumfang überall im wesentlichen den gleichen Abstand von den Elektrophorese-Zellen. Damit erhält man eine über die ganze Karosserieoberfläche sehr gleichmäßige stromdichte Verteilung und damit eine sehr gleichmäßige Beschichtung.How to get out Fig. 3 Also easily recognizes, both dialysis cell arrangements according to the invention, the side areas, the floor area and the roof area of the body K have substantially the same distance from the electrophoresis cells over the entire body circumference everywhere. This results in a very uniform current distribution over the entire body surface and thus a very even coating.

Wegen der überall kurzen Abstände zwischen Karosserie und Dialysezellen, wobei diese Abstände nur etwa ein Drittel des Maximalabstands bei der herkömmlichen Anordnung betragen, kann bei Anwendung der erfindungsgemäßen Dialysezellenanordnung auch mit deutlich geringerer elektrischer Spannung gearbeitet werden. Außerdem kann die erfindungsgemäße Dialysezellenanordnung bedeutend flexibler an die Gegebenheiten bei den verschiedenen Karosseriebereichen angepasst werden. Beispielsweise benötigt man im Bereich der seitlichen Fensterflächen der Karosserie weniger Anodenfläche, und im Bereich der Türschwellen oder des Dachs benötigt man mehr Anodenfläche. Bei der herkömmlichen Anordnung kann solchen Überlegungen nicht Rechnung getragen werden. Dort hat man eine gleichmäßig über die Beckenseitenwände verteilte Anodenfläche, die nahe der Karosserieseitenbereiche, also auch deren Fensterbereiche gelegen ist, aber weit bis sehr weit entfernt von den großen geschlossenen Flächen der Karosserie, nämlich insbesondere des Dachbereichs, gelegen ist. Gerade hier ergibt die erfindungsgemäße Anordnung eine ganz wesentliche und markante Verbesserung.Because of the everywhere short distances between the body and dialysis cells, these distances being only about one third of the maximum distance in the conventional arrangement, can be used when using the dialysis cell arrangement according to the invention also with significantly lower electrical voltage. In addition, the dialysis cell arrangement according to the invention can be adapted much more flexibly to the conditions in the various body areas. For example, in the area of the side window surfaces of the body, less anode area is required, and in the area of the door sills or the roof, more anode area is needed. In the conventional arrangement, such considerations can not be taken into account. There one has an evenly distributed over the tank side walls anode surface, which is located near the body side areas, including their window areas, but far to very far away from the large closed areas of the body, namely in particular the roof area is located. Just here, the arrangement of the invention results in a very significant and significant improvement.

Claims (3)

Dialysezellenanordnung für Elektrophorese-Bäder zum Tauchbeschichten oder Tauchlackieren metallener Gegenstände wie beispielsweise Autokarosserien, mit einer Mehrzahl von Dialysezellen,
dadurch gekennzeichnet, dass die Dialysezellen (3) jeweils in liegender, der Längsrichtung des Elektrophorese-Bads entsprechender Orientierung angeordnet und an einem in das Elektrophorese-Bad eingesetzten Rahmen (4) montiert sind, und die aus Rahmen und Dialysezellen gebildete Dialysezellenanordnung insgesamt die Konfiguration eines oben mittig längsgeschlitzten Rohrkörpers hat, wobei der Schlitzbereich das Durchführen von Hängevorrichtungen eines Hängeförderers zum Befördern der zu beschichtenden Gegenstände durch das Elektrophorese-Bad ermöglicht.Dialysis cell assembly for electrophoresis baths for dip coating or dip coating of metal objects such as car bodies, with a plurality of dialysis cells,
characterized in that the dialysis cells (3) are each arranged in a lying, the longitudinal direction of the electrophoresis bath corresponding orientation and mounted on a frame inserted into the electrophoresis bath (4), and the dialysis cell arrangement formed from frame and dialysis cells overall configuration of a at the top center of the longitudinally slotted tubular body, the slotted area permitting the passage of hanging devices of an overhead conveyor for conveying the articles to be coated by the electrophoresis bath. Anordnung nach Anspruch 1, wobei die Dialysezellen (3) als Rohrzellen ausgebildet sind.Arrangement according to claim 1, wherein the dialysis cells (3) are designed as tubular cells. Anordnung nach Anspruch 1 oder 2, wobei die Anordnungsdichte der Dialysezellen (3) entlang des Umfangs der Rohrkörperfiguration entsprechend der Flächendichteverteilung über den Umfang der zu beschichtenden Gegenstände angepasst ist.Arrangement according to claim 1 or 2, wherein the arrangement density of the dialysis cells (3) is adapted along the circumference of the tubular body configuration according to the surface density distribution over the circumference of the objects to be coated.
EP08009158A 2008-05-17 2008-05-17 Dialysis cell assembly in dip coating systems Withdrawn EP2119814A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114214705A (en) * 2021-12-16 2022-03-22 沈阳天通电气有限公司 Process method for carrying out electrophoretic coating on surface of wide multi-sheet workpiece

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19606000C1 (en) * 1996-02-17 1996-12-19 Daimler Benz Ag Electrophoretic dip lacquering bath
DE19914374A1 (en) * 1999-03-30 2000-10-05 Elektro Kohle Koeln Gmbh & Co Tubular dialysis cell, for suspending in an electrophoretic dip coating bath, has a plastic membrane tube incorporating an anion exchange resin
EP1388596A2 (en) * 2002-08-01 2004-02-11 EISENMANN MASCHINENBAU KG (Komplementär: EISENMANN-Stiftung) Installation for the cataphoretic painting of objects

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19606000C1 (en) * 1996-02-17 1996-12-19 Daimler Benz Ag Electrophoretic dip lacquering bath
DE19914374A1 (en) * 1999-03-30 2000-10-05 Elektro Kohle Koeln Gmbh & Co Tubular dialysis cell, for suspending in an electrophoretic dip coating bath, has a plastic membrane tube incorporating an anion exchange resin
EP1388596A2 (en) * 2002-08-01 2004-02-11 EISENMANN MASCHINENBAU KG (Komplementär: EISENMANN-Stiftung) Installation for the cataphoretic painting of objects

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114214705A (en) * 2021-12-16 2022-03-22 沈阳天通电气有限公司 Process method for carrying out electrophoretic coating on surface of wide multi-sheet workpiece

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