EP0150838B1 - Vorrichtung zum Halten von Hohlkörpern - Google Patents

Vorrichtung zum Halten von Hohlkörpern Download PDF

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Publication number
EP0150838B1
EP0150838B1 EP85100820A EP85100820A EP0150838B1 EP 0150838 B1 EP0150838 B1 EP 0150838B1 EP 85100820 A EP85100820 A EP 85100820A EP 85100820 A EP85100820 A EP 85100820A EP 0150838 B1 EP0150838 B1 EP 0150838B1
Authority
EP
European Patent Office
Prior art keywords
hollow bodies
holders
electrically conductive
holder
cans
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
Application number
EP85100820A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0150838A2 (de
EP0150838A3 (en
Inventor
Hans-Jürgen Schlinsog
Siegfried Kowalzick
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.)
Axalta Coating Systems Germany GmbH and Co KG
Original Assignee
Herberts 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
Application filed by Herberts GmbH filed Critical Herberts GmbH
Priority to AT85100820T priority Critical patent/ATE46679T1/de
Publication of EP0150838A2 publication Critical patent/EP0150838A2/de
Publication of EP0150838A3 publication Critical patent/EP0150838A3/de
Application granted granted Critical
Publication of EP0150838B1 publication Critical patent/EP0150838B1/de
Expired 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
    • C25D13/22—Servicing or operating apparatus or multistep processes

Definitions

  • the invention relates to a device for holding hollow bodies made of electrically conductive material, for example cans made of sheet metal, while they are being moved through an electrophoretic immersion bath, with a transport element running through the immersion bath and designed as an electrode and having the individual hollow bodies in a continuous sequence grips and temporarily holds at its open end, which has a flanged edge.
  • a transport element running through the immersion bath and designed as an electrode and having the individual hollow bodies in a continuous sequence grips and temporarily holds at its open end, which has a flanged edge.
  • P 3 304 940.8 describes a process for coating hollow bodies which are open on one side, in which the individual hollow bodies are washed, coated on the outside and inside with a lacquer, then dried and then, if appropriate, printed and dried again.
  • the hollow bodies such as cans, are passed through an electro-immersion bath in a continuous operation in such a way that they are quickly and completely flooded with immersion bath liquid in order to electrophoretically coat them with a wet film. After a sufficient coating time, the hollow bodies are lifted out of the immersion bath and the immersion bath liquid contained in them is poured out. During this treatment, they should be grasped at their flared open ends in such a way that the holder also acts as a contact electrode, which is assigned an inner counterelectrode located at a distance from the wall of the hollow body.
  • the object of the invention is to provide a holding device for the hollow bodies to be coated, which is suitable for performing the method according to P 3 304 940.8, while the latter are being moved through the electrophoretic immersion bath, which grips the hollow bodies reliably and safely and releases them after leaving the immersion bath and which ensures good electrical contact between the holder designed as an electrode and the individual hollow bodies.
  • the conical holder of which at least two and preferably three are arranged on a circle at a uniform distance from one another, can grasp or release the outwardly flanged edge of the individual hollow bodies to be coated, such as cans, in that they work together about their respective longitudinal axes rotated and / or moved tangentially to the flanged edge. If the holders, which are designed as conical pins, are rotated about their respective longitudinal axes, they grip the edge of the individual hollow bodies which is flanged outwards and tighten it, the relatively sharp-edged edge of the metallic hollow bodies cutting into the surface of the holders and, in particular, a lacquer layer located there, so to speak.
  • the conical pins or holders need only have a small diameter, only an extremely small mechanical switching path is required, for example a quarter turn of the pins or a short tangential movement.
  • the conical pins or holders as gripping elements have threads, raised spreading guide springs or spreading guide grooves on their lateral surface, the division or clear distance of which is based on the wall thickness of the hollow bodies to be detected, a result is obtained when the flanged edge of the hollow bodies is tightened on the holders particularly good cutting movement of the sharp flanged rim of the hollow body, when it comes to tin cans, so that the coating of the coating material located on the conical pegs or holders completely cut through and accordingly a perfect electrical contact between the one forming the electrode electrically conductive material existing holder and the hollow body to be coated is achieved.
  • the contact points formed on the flanged edge between the hollow body and holders, which are not coated in the immersion bath, are extremely small and are only located on the outer edge of the flanged edge. These points disappear when the hollow body or the can is closed with a lid in the fold formed in the process and are therefore not exposed to any corrosive influences on the closed hollow body.
  • these holders are provided, for example, with an electrically insulating insert made of plastic or an electrically insulating cap made of plastic. On these electrically insulating parts, the flanged edges of the individual hollow bodies can be moved for centering when inserted, without causing damage to the flanged edge.
  • the electrical contact to the conductive part of the individual rotatable pins is made by rotating or rotating the same about their longitudinal axis, the flanged edge being pulled firmly onto the rotatable pins and a coating located on their surface cuts from coating material with certainty.
  • the device according to the invention forms a perfect mechanical holder with a self-cleaning electrical contact, which enables the individual hollow bodies to be coated to be inserted without problems for the immersion bath coating and a tilt-free unloading onto a conveyor belt or the like after the coating.
  • the holding device according to the invention can be provided both on diving edges and on diving bars.
  • the rotary movements of the pivots or conical holders provided for gripping the edges of the can be brought about, for example, via a cam control.
  • the individual cans are gripped by the device in such a way that the cans break out when immersed in the immersion bath and when they are lifted out of the bath.
  • the mechanical switching path for gripping and holding or releasing the cans is small and can be controlled precisely, for example, via a curve.
  • the cans are gripped and held without the risk of wobbling or skewing so that successive cans cannot touch each other even if the cans are passed through the immersion bath in close succession. Because of the self-cleaning effect of the pivots when the cans are gripped, an insulating coating of the coating material of the immersion bath cannot form on these parts of the device which serve as electrodes.
  • the counterelectrode assigned to the pivot pin can be extremely small because it is possible to grip the coating agent well. On the other hand, there is no fear of damage to the cans due to the holding device.
  • the immersion bath section 1 has an immersion container 5 filled with coating liquid 4 for electrophoretic painting of metal cans 6 which are open on one side.
  • the individual cans 6 are fed to the system in a chute 7 and guided by a wheel 8 through the immersion bath 4, 5.
  • Holding devices 9 for the individual cans 6 are arranged on the outer circumference of the wheel 8, the details of which are shown in FIGS. 2 to 4.
  • the transport section 2 comprises an endless conveyor belt 10 which takes over the individual cans 6 after they have been lifted out of the immersion bath by the wheel 8 and the liquid inside them has leaked out.
  • the conveyor belt 10 runs over deflection rollers 11, 12 and 13, one of which is driven and at least one can be adjusted to maintain the belt tension.
  • blowing devices 14 and 15 are provided for blowing out the cans 6 located on the conveyor belt 10 and thus for pre-drying them.
  • a further endless conveyor belt 16 is provided between the transport section 2 and the drying section 3, which takes over the cans 6 from the conveyor belt 10 and, with their opening pointing upwards, sets them down on a horizontal conveyor belt 17 which guides the cans 6 through a drying oven 18.
  • the individual cans 6 must not only be grasped by the wheel 8 rotatably mounted on the immersion bath container 5, but also connected to an electrode.
  • the holding devices 9 provided on the outer circumference of the wheel 8 are therefore at the same time designed as electrodes which are connected to a pole of an electrical power source (not shown).
  • each holding device 9 has a support plate 19 on which a raised pin 20 is fastened centrally, which, like the support plate 19, consists of electrically conductive material.
  • the support plate 19 is at the other pole Power source connected, so that the pin 20 serves as a counter electrode, which projects into the interior of a can 6, but should not come into contact with the can.
  • Radially projecting arms 21 are provided on the outer circumference of the support plate 19, each of which contains a through opening into which a bushing 22 made of electrically insulating material is inserted, for example made of self-lubricating plastic.
  • the individual bushes serve as bearings for the shaft 23 of a conical pivot pin 24.
  • the pivot pins 24, including their shaft 23, also consist of electrically conductive material and are connected to the other pole of the electrical power source, insulated from the support plate 19. Accordingly, the pin 20 and the pivot pin 24 form the two counter electrodes required for the electrophoretic coating of the cans 6.
  • Each pivot 24 contains an insert 25 made of electrically insulating material, for example ceramic or plastic, which extends largely over its height.
  • the inserts 25 serve as a slide and centering path for the cans 6 to be attached to the holding device 9 when the pivots 24 are in the position shown in FIG. 2b.
  • the pivots 24 have threads 26 on their circumferential surface, which engage the outwardly flanged edge 27 of the individual cans 6 when the pivots 24 are rotated from the position shown in FIG. 2b about a quarter turn to the position shown in FIG. 2a .
  • the relevant can 6 is grasped at the open end and tightened on the holding device 9.
  • Fig. 4 shows that the outwardly flanged edge 27 of the can 6 engages deeply in the groove 28 located between the individual threads 26 and thus cuts into a coating of immersion bath liquid, possibly not shown in the drawing, on the pivot 24 to make a good electrically conductive contact with the pivot 24.
  • the grooves 28 located between the threads 26 have a U-shaped cross section, so that the outermost edge of the flanged edge 27 cannot be squeezed between the threads 26 and thereby damaged. This is clearly shown in FIG. 4.
  • the support plate 19 is attached to the outer end of an axis 29 as shown in FIG. 2.
  • a star-shaped switching member 30 is rotatably mounted on the axis 29, which is fastened to a socket 32 which is rotatably held on the axis 29 and is supported on a stop ring 31 and which is provided with a control rod 33 which has a control cam (not shown) the system interacts to produce the desired rotational movements of the pivot 24.
  • a pin 34 is fastened, which engages in an open fork 35, which is fastened to the lower end of each of the bushings 22 and how this can also consist of electrically insulating material.
  • Stops 39 limit the adjustability of the switching element 30 to approximately a quarter turn of the pivot pin 24.
  • the pivot pin 40 shown in FIG. 5 has a pin 41 made of electrically conductive material, on the upper end of which a conical cap 42 made of electrically insulating material is attached.
  • a guide spring 43 which projects beyond the surface and has a right-hand swirl in the upper part 43a and a left-hand swirl in the lower part 43b.
  • the two parts 43a and 43b of the guide spring 43 converge in a tip 44, in the area of which there is an electrically conductive contact 45 on the surface of the cone shell, which is in electrically conductive connection with the electrically conductive pin 41.
  • Hollow bodies 6 gripped by such a pivot pin 40 come into contact with their outwardly flanged edge 27 with this contact 45 when they are fastened to the pivot pin 40 after rotation, so that the supply of electrical current required for the electrophoretic coating is ensured.
  • the pin 41 is connected to the one pole of an electrical power source, not shown.
  • the pin 41 is also rotatably mounted in accordance with the double arrow 46 shown in order to be able to turn the pivot pin 40 for tightening or releasing the hollow bodies 6.
  • the pivot 47 shown in FIG. 6 differs from the pivot 40 from FIG. 5 only in that a guide groove 48 is machined into the outer surface of the cap 42 designed as an insulator, which has a right-hand swirl in the upper region 48a and a left-hand swirl in the lower region 48b.
  • the cap 42 contains an opening 50, in which a contact 51 lies, which is in electrically conductive connection with the electrically conductive pin 41 and as a power supply to the edge 27, which is flanged outwards, one of the pivot pin 47 captured and held hollow body 6 is used.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Manipulator (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Specific Conveyance Elements (AREA)
  • Laminated Bodies (AREA)
EP85100820A 1984-01-28 1985-01-26 Vorrichtung zum Halten von Hohlkörpern Expired EP0150838B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85100820T ATE46679T1 (de) 1984-01-28 1985-01-26 Vorrichtung zum halten von hohlkoerpern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3402911 1984-01-28
DE3402911A DE3402911A1 (de) 1984-01-28 1984-01-28 Vorrichtung zum halten von hohlkoerpern

Publications (3)

Publication Number Publication Date
EP0150838A2 EP0150838A2 (de) 1985-08-07
EP0150838A3 EP0150838A3 (en) 1987-01-21
EP0150838B1 true EP0150838B1 (de) 1989-09-27

Family

ID=6226123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100820A Expired EP0150838B1 (de) 1984-01-28 1985-01-26 Vorrichtung zum Halten von Hohlkörpern

Country Status (7)

Country Link
US (1) US4612107A (da)
EP (1) EP0150838B1 (da)
JP (1) JPS60159196A (da)
AT (1) ATE46679T1 (da)
DE (2) DE3402911A1 (da)
DK (1) DK34785A (da)
ES (1) ES8606540A1 (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4908153A (en) * 1988-05-06 1990-03-13 Service Tool Die & Mfg. Company Transport apparatus for electrocoating machines
AT2361U1 (de) * 1997-08-13 1998-09-25 Blau Automobiltechnik Gmbh Vorrichtung zum galvanisieren von schöpfenden teilen
US8603313B2 (en) * 2011-08-05 2013-12-10 Ppg Industries Ohio, Inc. Electrode configurations for coating interior and exterior surfaces of conductive substrates in an electrodeposition coating process
CN110172726B (zh) * 2019-05-15 2020-04-07 广州銲马体育器材有限公司 一种用金属材料对材料进行镀覆的装置
CN115872101B (zh) * 2023-02-07 2023-05-12 溧阳市中大电力交通装备有限公司 一种电力装备热镀锌中表面处理用输送系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253943A (en) * 1963-03-04 1966-05-31 Union Carbide Corp Bottle coating machine
US3694336A (en) * 1969-06-02 1972-09-26 Continental Can Co Method for can electrodeposition
US3759810A (en) * 1971-03-29 1973-09-18 American Can Co Roll through method for electro coating can ends
US3801485A (en) * 1972-09-01 1974-04-02 American Can Co Apparatus and method for electrodepositing a coating on interior surfaces of container bodies
US3785952A (en) * 1972-10-30 1974-01-15 Seidel Kg Geb Support for mounting small parts in electroplating processes
US4005000A (en) * 1973-09-17 1977-01-25 National Can Corporation Electrocoating apparatus and method
BR7608760A (pt) * 1976-06-07 1978-07-25 Standard Chem Co Inc Processo e aparelho para revestir eletroforeticamente um superficie de uma peca
US4158619A (en) * 1977-06-20 1979-06-19 Standard T Chemical Company, Inc. Method and apparatus for removing excess electro-phoretic material from a coated interior workpiece surface
DE3004765A1 (de) * 1980-02-08 1981-08-13 Alcan Aluminiumwerke GmbH, 3400 Göttingen Vorrichtung zum transport von innen zu behandelnden hohlkoerpern
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

Also Published As

Publication number Publication date
DE3402911A1 (de) 1985-08-08
ES8606540A1 (es) 1986-04-01
DK34785D0 (da) 1985-01-25
JPS60159196A (ja) 1985-08-20
DE3573247D1 (en) 1989-11-02
DK34785A (da) 1985-07-29
EP0150838A2 (de) 1985-08-07
US4612107A (en) 1986-09-16
JPH0577760B2 (da) 1993-10-27
ATE46679T1 (de) 1989-10-15
EP0150838A3 (en) 1987-01-21
ES539837A0 (es) 1986-04-01

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