EP0431711B1 - Procédé et dispositif pour la peinture par électrophorèse anodique ou cathodique des corps creux, en particulier des boîtes - Google Patents

Procédé et dispositif pour la peinture par électrophorèse anodique ou cathodique des corps creux, en particulier des boîtes Download PDF

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Publication number
EP0431711B1
EP0431711B1 EP90250283A EP90250283A EP0431711B1 EP 0431711 B1 EP0431711 B1 EP 0431711B1 EP 90250283 A EP90250283 A EP 90250283A EP 90250283 A EP90250283 A EP 90250283A EP 0431711 B1 EP0431711 B1 EP 0431711B1
Authority
EP
European Patent Office
Prior art keywords
hollow bodies
grid
housing
lacquer
anode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90250283A
Other languages
German (de)
English (en)
Other versions
EP0431711A1 (fr
Inventor
Karsten Ing. Loeck
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.)
PLM Berlin Dosenwerk GmbH
Original Assignee
PLM Berlin Dosenwerk GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19893938363 external-priority patent/DE3938363A1/de
Priority claimed from DE19904005619 external-priority patent/DE4005619A1/de
Priority claimed from DE19904005620 external-priority patent/DE4005620A1/de
Priority claimed from DE19904005622 external-priority patent/DE4005622A1/de
Application filed by PLM Berlin Dosenwerk GmbH filed Critical PLM Berlin Dosenwerk GmbH
Priority to AT90250283T priority Critical patent/ATE96476T1/de
Publication of EP0431711A1 publication Critical patent/EP0431711A1/fr
Application granted granted Critical
Publication of EP0431711B1 publication Critical patent/EP0431711B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/12—Electrophoretic coating characterised by the process characterised by the article coated
    • C25D13/14—Tubes; Rings; Hollow bodies

Definitions

  • the invention relates to a method and devices for the anodic or cathodic electro-coating of hollow bodies, in particular cans, such as beverage cans or the like, by means of a water-soluble lacquer as an electrolyte liquid, which contacts the cathode or anode and in at least one uninterrupted, producing a conductive connection Beam is directed onto the surfaces of the hollow body forming the anode or cathode.
  • the invention has for its object to provide a method of the type mentioned, which allows the anodic or cathodic electro-painting of hollow bodies, in particular cans, to be carried out in large numbers per unit of time and does not require a technically complex coating device.
  • a device for carrying out the method for cathodic electrodeposition essentially corresponds to the device for anodic electrodeposition according to the invention, however, in addition to its features, it has a dialysis circuit guided through the housing.
  • the housing is divided into an upper interior and a lower interior by means of a membrane, the upper interior communicating with the nozzle tubes and with at least one paint feed line and the lower interior containing a large-area electrode forming the anode and via an anolyte feed line and anolyte discharge line is connected to the dialysis circuit.
  • a metallic hollow body 1 here a beverage can, is placed on the bars 4 with the bottom 2 upwards and the opening 3 downwards.
  • the latter are arranged upright next to each other and at a distance parallel to each other and held by means of spacers 6 and grub screws with nuts 7.
  • the upper sides 5 of the lattice bars 4 supporting the hollow body 1 are designed in a cutting-like manner, so that a practically punctiform contact takes place between the edge of the opening 3 of the hollow body 1 and the lattice bars 4, which ensures very good electrical contact.
  • the hollow body 1, of which only one is shown here for the sake of clarity, are pushed in the direction of arrow K along the cutting-like upper sides 5 of the bars 4, as a result of which remnants of lacquer are constantly scraped off and thus always have a metallic contact between the opening edge of the hollow body 1 and the bars 4 is guaranteed.
  • the latter together with the hollow bodies 1 form the anode.
  • a housing 9, which forms the cathode and is located below the grid 4 has a plurality of nozzle tubes 8 arranged vertically thereon, which open into the intermediate space and in the region of the upper edge 5 of the grid bars 4.
  • the housing 9 consists of an upper part 9a having a circumferential flange 13 and a lower part 9b having a circumferential flange 14, which are connected to one another by means of screws (not shown) inserted into bores 15 of the flanges 13, 14.
  • the housing 9 is connected to the nozzle tubes 8 and an electrolyte feed line 16a.
  • an electrolyte return line 16b is provided, so that a circulation in the circuit is possible for excess paint or electrolyte liquid which does not emerge from the nozzle tubes 8.
  • a large-area electrode Arranged in the interior of the housing 9 is a large-area electrode, not shown, which makes the housing 9 a cathode and is connected to the corresponding pole of a DC voltage source. The bars 4 are connected to the other pole of this DC voltage source.
  • the device shown in FIG. 2 corresponds essentially to the structure of the device according to FIG. 1, which is why the same parts are provided with the same reference numerals here. Since the device for carrying out the method for cathodic electrodeposition is provided, it has a dialysis circuit guided through the housing 9. For this purpose, as FIGS. 3 and 4 show, a membrane 12 is arranged in the housing 9 between the flanges 13 and 14 and divides the housing 9 into an upper interior 10 and a lower interior 11.
  • the upper interior 10 stands with the nozzle tubes 8, and with a paint feed line 16 and a paint drain 20 in connection, while the lower interior 12 has an anolyte feed 17 and an anolyte drain 18.
  • the partial view of the housing 9 shown in FIG. 5 shows that a cylindrical helical spring 21 or 21a is inserted into the nozzle tubes 8, whereby adjacent nozzle tubes 8 are alternately provided with a clockwise and a counterclockwise spring. By means of this spring it is caused that the paint jets rising from the nozzle tubes 8 rotate about their own axis. Practical tests have shown that an extremely rapid filling of the interior of the hollow body can be achieved if the hollow body 1 which is pushed over the lattice bars stands on at least three bars, i.e. the interior of the hollow body is acted upon by at least two oppositely rotating paint jets.
  • FIG. 6 illustrates in a partial representation the arrangement of the means used to move and guide the hollow body 1.
  • a hollow body 1 is shown here again. It is driven by a screw conveyor 22 in the direction of arrow K with the Opening 3 shifted downward on the bars 4, being guided by a guide bar 23 on the side facing away from the screw conveyor 22.
  • a hold-down bar 24 is arranged above the hollow body 1, which ensures that it is not lifted off the bars 4 by the rising paint jets.
  • its outer surface is also flooded and coated by the paint emerging from the nozzle tubes 8.
  • FIGS. 1, 2 and 6 represent only a section of an overall system, the grids 4 of which are used to move a large number of hollow bodies arranged one behind the other and side by side with the opening facing downward in the direction of arrow K.
  • the overall system is constructed in a known manner and comprises a conveyor system by means of which the hollow bodies to be coated are pretreated by a pretreatment system for cleaning, degreasing and generating conversion layers, furthermore by a rinsing zone, a dryer and finally after coating again by a rinsing zone and a dryer and one Paint baking oven can be transported.

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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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Claims (17)

  1. Procédé pour le laquage électrolytique anodique ou cathodique de corps creux, en particulier des boîtes, comme des boîtes pour boissons ou analogues, au moyen d'une laque soluble dans l'eau en tant que fluide électrolytique, qui est mise au contact de la cathode ou de l'anode et qui est dirigée selon au moins un jet ininterrompu engendrant une liaison conductrice, sur les surfaces des corps creux formant l'anode ou la cathode,
    caractérisé en ce que les corps creux sont déplacés avec leur ouverture vers le bas au-dessus d'un treillis ou d'une grille électriquement conducteurs, la laque étant pulvérisée à travers les espaces intermédiaires libres entre les baguettes de la grille ou du treillis selon des jets montant du dessous, dans ou sur les corps creux et, ainsi, toutes leurs surfaces interne et externe étant recouvertes d'une couche continue.
  2. Procédé selon la revendication 1,
    caractérisé en ce que les corps creux sont déplacés sur la grille ou le treillis par pas ou de façon continue.
  3. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que les jets de laque montants tournent autour de leur propre axe.
  4. Procédé selon la revendication 3,
    caractérisé en ce que, à chaque fois, les jets de laque voisins tournent en sens opposé.
  5. Procédé selon l'une des revendications 1, 3 ou 4,
    caractérisé en ce que les jets de laque présentent une pression de sortie de moins de 1 bar (=0,1 MPa).
  6. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que l'espace interne des corps creux est complètement rempli, temporairement, par les jets de laque montants.
  7. Procédé selon la revendication 6,
    caractérisé en ce que le temps de remplissage dure environ 15-20 ms (millisecondes).
  8. Dispositif pour la mise en oeuvre du procédé pour le laquage électrolytique anodique selon les revendications 1 à 7,
    caractérisé en ce qu'il comporte :
    a) une grille (4) portant les corps creux (1) à laquer et formant avec les corps creux l'anode,
    b) un boîtier (9) se trouvant sous la grille (4) et formant la cathode, comportant des tubes de buse (8) qui sont agencés sur le boîtier et qui débouchent dans l'espace intermédiaire et dans la zone du bord supérieur (5) des baguettes de la grille (4),
    c) une cuve de réception (10), au-dessus de laquelle se trouvent le boîtier (9) et la grille (4), et qui fait partie d'un circuit de laquage guidé au-dessus du boîtier (9) et des tubes de buse (8) et comportant, de façon connue, une pompe de circulation, un filtre, le cas échéant un refroidisseur et un réservoir.
  9. Dispositif selon la revendication 8,
    caractérisé en ce que le boîtier (9) et les tubes de buse (8) sont constitués d'un matériau isolant et la cathode est formée d'une électrode, à grande surface, agencée dans le boîtier (9).
  10. Dispositif pour la mise en oeuvre du procédé pour le laquage électrolytique cathodique selon les revendications 1 à 7,
    caractérisé en ce qu'il comporte :
    a) une grille (4) portant les corps creux (1) à laquer et formant avec les corps creux la cathode,
    b) un boîtier (9), se trouvant sous la grille (4), constitué d'un matériau isolant et contenant l'anode, comportant des tubes de buse (8) qui sont agencés sur le boîtier et qui débouchent dans l'espace intermédiaire et dans la zone du bord supérieur (5) des baguettes de la grille (4),
    c) une cuve de réception (10), au-dessus de laquelle se trouvent le boîtier (9) et la grille (4), et qui fait partie d'un circuit de laquage guidé au-dessus du boîtier (9) et des tubes de buse (8) et comportant, de façon connue, une pompe de circulation, un filtre, le cas échéant un refroidisseur, et un réservoir, et
    d) un circuit de dialyse guidé à travers le boîtier (9).
  11. Dispositif selon la revendication 10,
    caractérisé en ce que le boîtier (9) est séparé au moyen d'une membrane (12) en un espace interne supérieur (10) et un espace interne inférieur (11), l'espace interne supérieur (10) étant relié aux tubes de buse (8) et à au moins une conduite de laque (16) et l'espace interne inférieur (11) contenant une électrode (19), à grande surface, formant l'anode et étant relié au circuit de dialyse par l'intermédiaire d'une liaison anolyte amont (17) et d'une liaison anolyte aval (18).
  12. Dispositif selon l'une des revendications 8 à 11,
    caractérisé en ce que l'écart entre les baguettes de la grille (4) est choisi de sorte que les corps creux (11) déplacés sur celle-ci reposent sur au moins trois baguettes, c'est-à-dire que l'espace interne du corps creux est alimenté par au moins deux jets de laque tournant en sens opposé.
  13. Dispositif selon l'une des revendications 8 à 12,
    caractérisé en ce que, dans les tubes de buse (8), un ressort helicoïdal cylindrique (21) ou (21a) est à chaque fois introduit, les tubes de buse (8) voisins étant alternativement munis d'un ressort tournant à droite et d'un ressort tournant à gauche.
  14. Dispositif selon l'une des revendications 8 à 13,
    caractérisé en ce que le dessus (5) des baguettes de la grille (4) est réalisé en tant qu'arête.
  15. Dispositif selon l'une des revendications 8 à 14,
    caractérisé en ce que, pour déplacer les corps creux (1), au moins une vis sans fin de transport (22) est prévue.
  16. Dispositif selon la revendication 15,
    caractérisé en ce que les corps creux (1) sont guidés du côté éloigné de la vis sans fin de transport (22) par une barrette de guidage (23).
  17. Dispositif selon l'une des revendications 8 à 16,
    caractérisé en ce qu'au-dessus des corps creux (1) guidés sur la grille (4), est agencée au moins une barrette de maintien (24).
EP90250283A 1989-11-16 1990-11-15 Procédé et dispositif pour la peinture par électrophorèse anodique ou cathodique des corps creux, en particulier des boîtes Expired - Lifetime EP0431711B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90250283T ATE96476T1 (de) 1989-11-16 1990-11-15 Verfahren und vorrichtungen zum anodischen oder kathodischen elektrolackieren von hohlkoerpern, insbesondere von dosen.

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DE3938363 1989-11-16
DE19893938363 DE3938363A1 (de) 1989-11-16 1989-11-16 Lackieren von zwei- oder dreiteiligen metallgetraenkedosen innen und aussen in zwei arbeitsgaengen durch eine ed-coat-spruehapplikation
DE4005619 1990-02-22
DE4005622 1990-02-22
DE4005620 1990-02-22
DE19904005619 DE4005619A1 (de) 1990-02-22 1990-02-22 Vorrichtung zum kathodischen elektrolackieren von gegenstaenden
DE19904005620 DE4005620A1 (de) 1990-02-22 1990-02-22 Verfahren und vorrichtung zum anodischen oder kathodischen elektrolackieren
DE19904005622 DE4005622A1 (de) 1990-02-22 1990-02-22 Vorrichtung zum elektrostatischen beschichten oder zum anodischen bzw. kathodischen elektrolackieren von gegenstaenden

Publications (2)

Publication Number Publication Date
EP0431711A1 EP0431711A1 (fr) 1991-06-12
EP0431711B1 true EP0431711B1 (fr) 1993-10-27

Family

ID=27434791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250283A Expired - Lifetime EP0431711B1 (fr) 1989-11-16 1990-11-15 Procédé et dispositif pour la peinture par électrophorèse anodique ou cathodique des corps creux, en particulier des boîtes

Country Status (8)

Country Link
US (1) US5164056A (fr)
EP (1) EP0431711B1 (fr)
JP (1) JPH03207896A (fr)
AT (1) ATE96476T1 (fr)
CA (1) CA2030033C (fr)
DE (1) DE59003239D1 (fr)
DK (1) DK0431711T3 (fr)
ES (1) ES2045779T3 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4127740A1 (de) * 1991-08-22 1993-03-04 Klaus Joergens Verfahren und vorrichtung zum pruefen der porositaet von beschichteten gegenstaenden
DE4205672C2 (de) * 1992-02-25 1995-04-20 Doerken Ewald Ag Vorrichtung zur elektrolytischen Beschichtung von Kleinteilen
EP0570738B1 (fr) * 1992-05-21 1994-11-30 Klaus Jörgens Procédé et appareil de revêtement de corps creux
US5409585A (en) * 1993-04-05 1995-04-25 Ppg Industries, Inc. Nozzle arrangement for electrocoating container interiors
DE4325631C2 (de) * 1993-07-30 1996-03-28 Joergens Klaus Vorrichtung zum elektrophoretischen Beschichten der Innenoberfläche von Hohlkörpern
DE19505524C2 (de) * 1995-02-18 1996-12-19 Wernicke & Co Gmbh Vorrichtung zum Zentrieren eines Brillenglasrohlings und Anbringen eines Halteteils auf einer optischen Oberfläche des Brillenglasrohlings
AU6454699A (en) 1998-10-22 2000-05-15 Alcan International Limited Decorative beverage can bodies
US7947160B2 (en) * 2004-08-13 2011-05-24 Ppg Industries Ohio, Inc. System for coating objects
US20060051511A1 (en) * 2004-08-13 2006-03-09 Orosz Gary R Apparatus and systems for coating objects
US7943028B2 (en) * 2004-08-13 2011-05-17 Ppg Industries Ohio, Inc. Method for coating objects
US20060032730A1 (en) * 2004-08-13 2006-02-16 Kaufman Paul J Belt conveyor apparatus
US8524065B2 (en) * 2008-09-19 2013-09-03 Metokote Corporation Systems and methods for electrocoating a part
ES2381348B1 (es) * 2010-10-27 2013-05-06 Industrias Peñalver, S.L. Cabezal de rebarnizado para tapas de geometría circular.
ES2396845B1 (es) * 2010-12-17 2014-01-16 Industrias Peñalver, S.L. Cabezal de rebarnizado para tapas.
DE102012207699A1 (de) 2012-01-05 2013-07-11 Keiper Gmbh & Co. Kg Hohlkörperhalbzeug, Verfahren zu dessen Herstellung und Verfahren zur Herstellung eines Hohlkörpers
PL2964805T3 (pl) * 2013-03-06 2019-11-29 Quaker Chem Corp Wysokotemperaturowa powłoka konwersyjna na podłożach stalowych i żelaznych
CN115537897B (zh) * 2022-11-28 2023-04-18 成都图南电子有限公司 一种磁体表面处理装置

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US3650932A (en) * 1969-11-03 1972-03-21 Ford Motor Co Electro-flow coating method
US3922213A (en) * 1974-10-23 1975-11-25 Aluminum Co Of America Method and apparatus for uniformly electrocoating the interior of a shaped metal container
SE7608242L (sv) * 1975-07-21 1977-01-22 Standard T Chemical Co Inc Forfarande for elektroforetisk beleggning och apparat for utovande av forfarandet
US4400251A (en) * 1981-06-05 1983-08-23 Aluminum Company Of America Method and apparatus for simultaneously electrocoating the interior and exterior of a metal container
DE3325068A1 (de) * 1983-07-12 1985-01-24 Herberts Gmbh, 5600 Wuppertal Verfahren zum beschichten einseitig offener hohlkoerper

Also Published As

Publication number Publication date
JPH03207896A (ja) 1991-09-11
CA2030033A1 (fr) 1991-05-17
ATE96476T1 (de) 1993-11-15
JPH0433874B2 (fr) 1992-06-04
CA2030033C (fr) 1997-06-24
US5164056A (en) 1992-11-17
DK0431711T3 (da) 1993-12-13
ES2045779T3 (es) 1994-01-16
DE59003239D1 (de) 1993-12-02
EP0431711A1 (fr) 1991-06-12

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