EP0570738A1 - Procédé et appareil de revêtement de corps creux - Google Patents

Procédé et appareil de revêtement de corps creux Download PDF

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Publication number
EP0570738A1
EP0570738A1 EP93107026A EP93107026A EP0570738A1 EP 0570738 A1 EP0570738 A1 EP 0570738A1 EP 93107026 A EP93107026 A EP 93107026A EP 93107026 A EP93107026 A EP 93107026A EP 0570738 A1 EP0570738 A1 EP 0570738A1
Authority
EP
European Patent Office
Prior art keywords
hollow bodies
immersion bath
nozzles
immersed
paint
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.)
Granted
Application number
EP93107026A
Other languages
German (de)
English (en)
Other versions
EP0570738B1 (fr
Inventor
Klaus Jörgens
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.)
Individual
Original Assignee
Individual
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 DE4239680A external-priority patent/DE4239680C2/de
Application filed by Individual filed Critical Individual
Publication of EP0570738A1 publication Critical patent/EP0570738A1/fr
Application granted granted Critical
Publication of EP0570738B1 publication Critical patent/EP0570738B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/09—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
    • B05C3/10—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles the articles being moved through the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C7/00—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • B05C9/045—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work in which the opposite sides of the work are the internal and external surfaces of hollow articles
    • 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 a device for coating cabbages having an opening, in particular beverage cans.
  • the immersion method, the flooding method or a spraying method can be used for painting such hollow bodies.
  • Each of these methods has certain advantages and disadvantages.
  • the largest possible plunge pools are used in the dipping process.
  • the problem arises that the hollow bodies have to be completely filled with the lacquer when immersed and without air bubbles and therefore have to be introduced with the opening upwards into the immersion bath while they are out after the treatment, ie after surfacing emptied the immersion bath again, ie must be turned with the opening downwards.
  • Such a method is e.g. B. described in European patent application 0 118 756.
  • a coating is achieved by simply flooding or sprinkling an object with the aid of an electrophoresis lacquer. It should be noted here that the speed of the overflowing lacquer is limited so as not to interfere with the formation of the coating. Furthermore, only a one-sided coating can be achieved with this, in the case of hollow bodies only the outside.
  • the invention is based, a method and a task To provide a device for coating hollow bodies in the immersion process, in which it is not necessary to turn the hollow bodies when introducing or leaving the immersion bath and with which it is possible to smooth the outer and inner surfaces of the hollow bodies evenly and in one operation coat without any disadvantageous foaming.
  • the hollow bodies are completely immersed with the opening facing downwards in an immersion bath with a lacquer, with the openings brought into the region of nozzles for the lacquer arranged in the immersion bath under the liquid surface and the air enclosed in the hollow bodies immersed in the immersion bath is at least partially displaced by the paint emerging from the nozzles.
  • the outer surface is completely wetted so that the coating takes place immediately after immersion.
  • the paint is injected into the hollow body by means of the nozzles arranged in the immersion bath under the liquid surface, at least partially displaces the enclosed air and fills the hollow body.
  • the inner surface is completely covered with a layer of lacquer, so that a complete, non-porous coating also results here.
  • a sufficiently powerful jet of liquid is created which rises to the bottom of the inner surface and displaces the trapped air.
  • the hollow bodies When removing them from the immersion bath, the hollow bodies run completely empty, since they continue to point downward with the openings, unnecessary paint drips off, after which the coated hollow bodies undergo a further, conventional treatment, eg B. Rinse and dry.
  • a further, conventional treatment eg B. Rinse and dry.
  • air nozzles can be arranged in the immersion bath following the paint nozzles, the air in turn displacing the paint from the hollow bodies.
  • the hollow bodies If you want to completely displace the air enclosed in the hollow bodies immersed in the immersion bath, it is advantageous to first guide the hollow bodies into an area with a first nozzle group and then into an area with a second nozzle group after immersing them in the immersion bath.
  • the liquid jets generated by the second group of nozzles not only cause a complete displacement of the enclosed air, but also such a flow and turbulence in the hollow bodies that a quick coating is ensured.
  • a device of the type mentioned at the outset which comprises an immersion bath containing a lacquer, a the hollow body with the opening down completely immersing in and removing from the immersion bath transport device and arranged in the immersion bath below the liquid surface, directed into the openings of the hollow body immersed in the immersion bath for paint.
  • the transport device can consist of a wheel immersed in the immersion bath with holders for the hollow bodies, the hollow bodies are clamped to the holders outside of the immersion bath by hand or by means of automatic devices and, when the wheel is rotated further, are immersed with the opening downward into the immersion bath.
  • the hollow bodies are guided past the nozzles, the air is at least partially displaced from the hollow bodies and the inner surfaces of the hollow bodies are covered by the nozzles in an uninterrupted layer.
  • the hollow bodies run empty and can then be removed from the wheel and subjected to a customary further treatment.
  • the transport device can preferably consist, at least in some areas, of a guide channel for hollow bodies arranged in a loose connection, at least on the underside and partially under the liquid surface.
  • This guide channel holds the hollow body together and leads it to below the liquid surface, the hollow body z. B. by means of a pushing device arranged outside the immersion bath through the Guide channel can be pushed.
  • the guide channel can consist, at least in the deepest area immersed in the immersion bath, of a conveyor belt pair which grips the hollow bodies between their upper and lower sides, at least in the area of the lower sides of the hollow bodies with the openings, at least some of the nozzles in the Area below the conveyor belt gripping the undersides of the hollow bodies can be arranged.
  • the paint jets emerging from the nozzles penetrate the broken conveyor belt and penetrate into the hollow bodies gripped between the pair of conveyor belts and support the coating.
  • nozzles for gas preferably directed into the openings of the hollow bodies immersed in the immersion bath, can be placed in the immersion bath under the liquid surface Air, be arranged after the nozzles for the paint.
  • Devices for cleaning, rinsing and possibly drying the objects to be treated are usually arranged in front of the immersion bath 1.
  • devices for drying the coated containers are arranged after the immersion bath. This is a known technique that need not be described in detail.
  • hollow bodies are to be coated on the inside and outside, which in the example shown consist of beverage cans 8.
  • beverage cans 8 are with their bottom 9 up and their top 10, which is the top of the Drinks can 8 forms and has an opening 11, guided in a guide channel 12 below the liquid surface 26 of the immersion bath 1.
  • the guide channel 12 consists of an area leading into the immersion bath 1 and from the immersion bath 1, which is formed from parallel upper and lower longitudinal bars 13 and side guide bars 14, which are connected to one another by means of spacers 15 and form a closed channel.
  • the guide channel consists of a pair of link belts 16.
  • Each link belt 16 is guided endlessly via a pair of guide rollers 17, which are connected to a drive 18.
  • the lateral limitation of the guide channel in this area is given by side guide rods 19.
  • the beverage cans 8 are guided in a loose connection through the guide channel 12, wherein they are pushed into the guide channel part immersed in the immersion bath 1 and are subsequently gripped by the pair of link belts 16.
  • the all-round guidance of the beverage cans 8 ensures that they dip into the paint of the immersion bath 1 without floating.
  • the air enclosed in the beverage cans 8 when immersed in the paint of the immersion bath 1 is first displaced by means of paint by spraying paint jets between the longitudinal bars 13 and the nozzles 23 which are arranged on a distributor housing 24 Spacers 15 through the openings 11 of the Beverage cans 8 are directed.
  • the paint is sucked in by a circulation pump 25 in the immersion bath 1 and supplied to the distributor housing 24 under pressure.
  • the outlet openings of the nozzles 23 are arranged as close as possible in the area of the openings 11 of the beverage cans 8 in order to introduce the paint into the interior of the beverage cans 8 with the greatest possible energy and to at least partially displace the enclosed air.
  • Paint jets are again directed into the beverage cans 8 from below via further nozzles 20 arranged on a distributor housing 7.
  • the distributor housing 7 with the nozzles 20 is arranged below the lower link belt adjacent to the beverage cans 8, which has so many openings for the paint jets that they can pass through the link belt 16 essentially unhindered and to the bottom 9 of the beverage cans 8 can reach.
  • the air from the interior of the beverage cans 8 is more or less completely displaced by the paint jets emerging from the nozzles 20 and 23, and any remaining air bubbles do not disturb the coating, since the inner surface of the beverage cans due to the strong movement of the paint in the interior of the beverage cans 8 the jet effect of the nozzles 20 is always covered in an uninterrupted layer.
  • beverage cans 8 return to a guide channel area formed by longitudinal bars 13, lateral guide bars 14 and spacers 15 and become led out of the immersion bath 1.
  • the beverage cans 8 empty, excess paint residues drip back into the bath.
  • This emptying is supported in that air is blown into the cavities of the beverage cans 8 by means of air nozzles 27 and the lacquer is thereby displaced therefrom.
  • the air nozzles 27 are arranged on a distributor housing 28 which is pressurized with compressed air by means of an air pump 29.
  • the beverage cans are then further processed in the usual way.
  • the method and the device according to the invention achieve a very short coating time with a completely uniform and dense coating, especially in the interior of the beverage cans.
  • the system can be operated in the usual way as a dip painting process with only one plunge pool. Compared to the flooding and nozzle pipe process, the formation of foam is avoided or at least considerably reduced and the beverage cans or other hollow bodies can be guided in a loose connection in a simple manner without having to be taken individually when the guide channel 12 shown is used.
  • 2000 to 3000 cans per minute can be coated electrophoretically without any problems.
  • these hollow bodies can also be used on a wheel with a horizontal axis of rotation to arrange, the hollow bodies being attached to holders on the wheel outside the immersion bath, passing through the immersion bath and then being removed again in order to treat them further in the usual way.
  • hollow bodies are introduced with the opening downwards into an immersion bath, through which nozzles arranged below the lacquer surface and directed towards the downward openings of the hollow bodies are acted upon by lacquer jets, in such a way that those in the Air displaced hollow bodies, the inner surface of the hollow bodies is evenly covered with lacquer in an uninterrupted, moving layer and this results in a uniform coating of the inner surface.

Landscapes

  • 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)
  • Application Of Or Painting With Fluid Materials (AREA)
EP93107026A 1992-05-21 1993-04-30 Procédé et appareil de revêtement de corps creux Expired - Lifetime EP0570738B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4216741 1992-05-21
DE4216741 1992-05-21
DE4239680 1992-11-26
DE4239680A DE4239680C2 (de) 1992-05-21 1992-11-26 Verfahren und Vorrichtung zum Beschichten von Hohlkörpern

Publications (2)

Publication Number Publication Date
EP0570738A1 true EP0570738A1 (fr) 1993-11-24
EP0570738B1 EP0570738B1 (fr) 1994-11-30

Family

ID=25915008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107026A Expired - Lifetime EP0570738B1 (fr) 1992-05-21 1993-04-30 Procédé et appareil de revêtement de corps creux

Country Status (3)

Country Link
US (3) US5474610A (fr)
EP (1) EP0570738B1 (fr)
ES (1) ES2068723T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3526150B2 (ja) * 1995-10-31 2004-05-10 矢崎総業株式会社 メッキ処理治具及びメッキ処理治具を用いたメッキ処理方法
US5858098A (en) * 1997-01-10 1999-01-12 Eagle-Picher Industries, Inc. Immersion can coating apparatus and method
DE10226017A1 (de) * 2002-06-12 2003-12-24 Krones Ag Verfahren und Vorrichtung zum Herstellen von Hohlkörpern
DE10251047A1 (de) * 2002-11-02 2004-05-19 Bayerische Motoren Werke Ag Anlage zum Behandeln, insbesondere zum Lackieren von Gegenständen
US7412979B2 (en) * 2004-03-17 2008-08-19 Ball Corporation Selective removal or application of a coating on a portion of a container
TW200738532A (en) * 2006-04-10 2007-10-16 Chicony Electronic Co Ltd Material delivery system capable of preventing dust suspension
US8225741B2 (en) * 2009-01-28 2012-07-24 Mcwane Cast Iron Pipe Company Automated processing line for applying fluid to lengths of pipe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3108549A1 (de) * 1981-03-06 1982-09-16 Heinrich Zeidler Maschinenfabrik Gmbh & Co Kg, 8672 Selb Verfahren und vorrichtung zum glasieren keramischer hohlkoerper
SU1015924A1 (ru) * 1981-12-29 1983-05-07 Горьковский Автомобильный Завод (По "Газ") Устройство дл нанесени покрыти
EP0118756A1 (fr) * 1983-02-12 1984-09-19 Herberts Gesellschaft mit beschränkter Haftung Procédé de revêtement de boîtes

Family Cites Families (16)

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US544500A (en) * 1895-08-13 Machine for tinning or coating sh eet-metal plates
US1056291A (en) * 1909-02-24 1913-03-18 John Nazel Apparatus for coating articles.
US3053704A (en) * 1953-11-27 1962-09-11 Exxon Research Engineering Co Heat treating metals
US3047418A (en) * 1959-10-23 1962-07-31 Gladding Mcbean & Co Method of producing novel decorative effects on ceramic objects
NL7505936A (nl) * 1975-05-21 1976-11-23 Skf Ind Trading & Dev Reinigingsinrichting voor werktuigkundige voor- werpen.
DE2548414A1 (de) * 1975-07-21 1977-01-27 Standard T Chemical Co Inc Verfahren und vorrichtung zur elektrophoretischen beschichtung von gegenstaenden
JPS5919990B2 (ja) * 1981-01-29 1984-05-10 トヨタ自動車株式会社 化成処理方法及びその装置
JPS56158896A (en) * 1980-05-12 1981-12-07 Toyota Motor Corp Surface treating device
US4383454A (en) * 1980-07-07 1983-05-17 Pitney Bowes Inc. Reversible slip clutch
JPS6143575Y2 (fr) * 1980-09-01 1986-12-09
US4452171A (en) * 1982-07-16 1984-06-05 Jess Browning Material handling apparatus
JPS59118885A (ja) * 1982-12-25 1984-07-09 Toyota Motor Corp 化成処理方法および化成処理装置
US4668536A (en) * 1985-12-23 1987-05-26 Eagle-Picher Industries, Inc. Method and apparatus for coating corrugated board
US5062529A (en) * 1988-11-14 1991-11-05 Blair Connie D Enclosure for curling iron or similar article
JPH02285095A (ja) * 1989-04-25 1990-11-22 Daihen Corp 電気機器ケースの電着塗装装置
DE59003239D1 (de) * 1989-11-16 1993-12-02 Plm Berlin Dosenwerk Gmbh Verfahren und Vorrichtungen zum anodischen oder kathodischen Elektrolackieren von Hohlkörpern, insbesondere von Dosen.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3108549A1 (de) * 1981-03-06 1982-09-16 Heinrich Zeidler Maschinenfabrik Gmbh & Co Kg, 8672 Selb Verfahren und vorrichtung zum glasieren keramischer hohlkoerper
SU1015924A1 (ru) * 1981-12-29 1983-05-07 Горьковский Автомобильный Завод (По "Газ") Устройство дл нанесени покрыти
EP0118756A1 (fr) * 1983-02-12 1984-09-19 Herberts Gesellschaft mit beschränkter Haftung Procédé de revêtement de boîtes

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Database WPI Section PQ, Week 198410, 18. April 1984 Derwent Publications Ltd., London, GB; Class P42, AN 1984-061098 & SU-A1-1 015 924 (GORKI CARS WKS) 7. Mai 1983 *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 236 (C-249)(1673) 30. Oktober 1984 & JP-A-59 118 885 ( TOYOTA JISHODA K.K. ) 9. Juli 1984 *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 056 (C-0804)8. Februar 1991 & JP-A-02 285 095 ( DAIHEN CORP. ) 20. November 1990 *

Also Published As

Publication number Publication date
ES2068723T3 (es) 1995-04-16
US5474610A (en) 1995-12-12
US5704979A (en) 1998-01-06
EP0570738B1 (fr) 1994-11-30
US5478597A (en) 1995-12-26

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