EP0369477B1 - Procédé et appareil pour enduire une tôle avec une peinture en poudre - Google Patents

Procédé et appareil pour enduire une tôle avec une peinture en poudre Download PDF

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Publication number
EP0369477B1
EP0369477B1 EP89121340A EP89121340A EP0369477B1 EP 0369477 B1 EP0369477 B1 EP 0369477B1 EP 89121340 A EP89121340 A EP 89121340A EP 89121340 A EP89121340 A EP 89121340A EP 0369477 B1 EP0369477 B1 EP 0369477B1
Authority
EP
European Patent Office
Prior art keywords
station
powder coating
sheet metal
metal strip
extruder
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.)
Revoked
Application number
EP89121340A
Other languages
German (de)
English (en)
Other versions
EP0369477A3 (fr
EP0369477A2 (fr
Inventor
Adolf Berkmann
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.)
COLUMBUS SYSTEM PATENT AG
Original Assignee
COLUMBUS SYSTEM PATENT AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6367367&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0369477(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by COLUMBUS SYSTEM PATENT AG filed Critical COLUMBUS SYSTEM PATENT AG
Publication of EP0369477A2 publication Critical patent/EP0369477A2/fr
Publication of EP0369477A3 publication Critical patent/EP0369477A3/fr
Application granted granted Critical
Publication of EP0369477B1 publication Critical patent/EP0369477B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • B05D1/265—Extrusion coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment

Definitions

  • the invention relates to a method for coating sheet-like strip sheets with powder coating, which are wound on a roll of tape, the sheet-like strip sheet being unwound from the roll and first pretreated and dried.
  • the invention also relates to an apparatus for performing the method.
  • thermosetting powder coating solid resin, hardener, coloring pigments, additives and extenders are mixed, plasticized in an extruder and made from the Extruder is applied, whereupon the strand-like material emerging from the extruder is rolled out between cooling rolls and cooled on a subsequent cooling belt. After cooling, the hardened plastic band is crushed and then crushed and sieved. The powder thus obtained can then be used as a powder coating for coating objects.
  • the object of the invention is to provide a method and a device by means of which sheet-like strip sheets drawn off from a strip roll at high speed can be coated with powder coating in a uniform manner with little effort.
  • thermosetting powder coating in a plasticized, flowable state at a temperature which is below the reaction temperature of the hardener on the moving strip plate. immediately applied and pressed onto the strip plate and distributed and that the applied powder coating layer is then brought to a temperature above the reaction time of the hardener by the action of heat and thus liquefied and evenly distributed and brought to hardening, whereupon the strip plate is cooled and wound up into a strip roll.
  • the powder coating is advantageously applied directly to the strip plate by means of an extruder.
  • the flowable powder coating applied is distributed and pressed onto the strip plate by rolling.
  • This procedure makes it possible to apply a uniform layer of powder coating in a flowable state even with fast-moving belts.
  • the tape coated in this way then runs through an oven, the heat being supplied to liquefy and harden the applied powder coating layer by means of medium-wave infrared rays.
  • By heating the applied lacquer layer it is distributed even more finely and brought to hardening, whereby a completely uniformly coated strip plate is obtained after cooling.
  • strip plates can be coated with high throughput speeds and thus high economic efficiency.
  • What is essential here is the fact that the powder coating is applied in a flowable state, as a result of which the effort required in conventional powder coating is used many spray guns and the suction and recovery of the excess powder can be seen.
  • the application in the flowable state and subsequent distribution and pressing by means of rollers results in a much more uniform distribution of the lacquer layer than is possible in the case of large bandwidths in the dry powdery state because of the necessary suction, whereby with dry powder coating these difficulties increase with increasing bandwidth and increasing transport speed of the strip plate.
  • the present method thus not only enables the application of a uniform lacquer layer at large bandwidths and high belt speeds, which would not be achievable with the usual coating methods with powdery, dry lacquer, but also leads to considerable savings in the production of the powder lacquer, because of how As shown above, several process steps, which are necessary for the production of the dry powder coating, are omitted.
  • the strip sheet coated in this way is cooled and then wound up into a roll of tape, in which case a release paper web can advantageously also be wound up.
  • a device for carrying out a coating of continuous strip sheets which has a strip sheet holding and unwinding station, a pretreatment station, a drying station, a powder coating and surface smoothing station as well as a cooling station and a strip sheet winding station unwinding, cleaning, pretreating, spraying with powder, melting the dry powder, rolling out the melted layer and then cooling, after which the tape is wound up.
  • thermosetting powder coating in the plasticized, flowable state is applied directly to the moving strip plate at a temperature which is below the reaction temperature of the hardener, and is pressed onto the strip plate, and then the applied powder coating layer is brought to a temperature above the reaction temperature of the hardener by the action of heat and thus liquefied and evenly distributed and brought to hardening, whereupon the strip plate is cooled and wound up into a strip roll.
  • the powder coating station is an extruder for the thermosetting powder coating with direct powder coating application has in the plasticized state on the strip plate by means of one or more nozzles, and that an aftertreatment and curing station is provided between the powder coating and surface smoothing station and the cooling station.
  • Squeeze rollers for removing surface water can advantageously be provided between the pretreatment station and the drying station.
  • the pretreatment station has a flow chamber with spray nozzles which can optionally be connected to a source with cleaning or treatment liquid and a source with rinsing liquid.
  • the strip is degreased, cleaned, rinsed and phosphated.
  • the drying station has a flow chamber with infrared radiators and air-blowing nozzles in order to dry the pretreated and cleaned strip plate.
  • the extruder for applying the flowable plastic material to the strip plate can be one Embodiment variant according to the invention have a slot die, which opens directly above the moving strip plate.
  • the extruder it is also possible for the extruder to have a plurality of nozzles arranged side by side, which open directly above the moving strip plate.
  • This latter variant is possible because after the flowable plastic material has been applied to the strip plate, this applied plastic material is evenly distributed in the powder coating distribution and surface smoothing station.
  • This station has at least one pair of rollers, in which the rollers are pressed against one another on both sides against the strip plate.
  • a plurality of pairs of rollers connected in series are used in order to bring about an even distribution of the applied flowable plastic material and to bring about sufficient adhesion between this material and the strip plate by the pressing process that occurs during rolling.
  • the applied plastic material is then brought into an even more flowable state before curing begins due to the higher temperature.
  • the plastic material can be distributed extremely evenly, so that an extremely uniformly distributed and thus uniformly thick powder coating layer can be achieved even with large bandwidths.
  • the drawing shows schematically an embodiment of a device or system for coating sheet-like strip sheets.
  • a band roll 2 is rotatably mounted in a band plate holding and unwinding station 1, from which a band plate 3 is pulled off and conveyed through the individual subsequent stations at high speed, for example at 60 meters / minute, in order to then end up as coated tape in a winding station 4 to be wound into a tape roll.
  • the strip 3 pulled off the strip roll 2 first passes through a pretreatment station 5, which is designed as a flow chamber and has spray nozzles 6 on the inside, which can optionally be acted upon with a treatment liquid or a rinsing liquid, the treatment liquid being used for cleaning, degreasing and phosphating the strip plate .
  • a pair of squeeze rollers 7 is provided in order to squeeze off the water adhering to the strip plate, which was required to rinse off the treatment liquid, before the strip plate 3 runs into a drying station 8, which is designed as a pass-through chamber and has infrared emitters 9 and air-blowing nozzles inside 10 has to dry the still adhering water.
  • the cleaned, degreased, phosphated and dried The strip plate 3 then arrives at an extruder 11 which is equipped with a slot die 12 which opens directly above the strip plate 3 and applies the plastic material plasticized in the extruder directly to the strip plate 3.
  • the plastic material directly applied to the strip plate 3 in the flowable state is then evenly distributed in a powder coating distribution and surface smoothing station 13, which has a plurality of roller pairs 14, and pressed onto the strip plate 3.
  • the roller pairs 14 can be heated or cooled depending on the present requirements.
  • the temperature of the plastic material emerging from the extruder is just below the temperature at which the hardener contained in the material begins to react.
  • a post-treatment and curing station 15 which, like the pre-treatment and drying station, is designed as a tunnel-like passage chamber and has infrared radiators 16 in its interior, which are applied to the strip 3 heat the applied powder coating layer to such an extent that this layer becomes even more flowable, whereby a completely uniform distribution of the powder coating layer on the strip plate is achieved.
  • the hardener is activated so that after the powder coating material has been distributed, it hardens and dries.
  • the strip plate arrives in a cooling station 17, which is also designed as a tunnel-like flow chamber.
  • the strip plate is cooled by means of air that emerges from blow-out nozzles 18.
  • the strip plate coated in this way is wound up in the winding station 4 to form a strip roll, a release paper being pulled off a strip roll 19 and also wrapped between the individual windings of the strip plate in order to protect the powder coating layer applied.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (13)

  1. Procédé pour le revêtement de feuillards continus avec une peinture en poudre, ces feuillards étant enroulés sur un rouleau de bande, le feuillard continu étant dévidé du rouleau et d'abord prétraité et séché, caractérisé en ce que la peinture en poudre thermodurcissable est appliquée, à l'état ramolli et à écoulement libre, directement sur le feuillard en mouvement et pressée sur lui à une température qui se situe au-dessous de la température de réaction du durcisseur, et en ce que la couche de peinture en poudre appliquée est ensuite portée par effet thermique à une température supérieure à la température de réaction du durcisseur et ainsi fluidifiée et répartie régulièrement et amenée à durcissement, après quoi le feuillard est refroidi et enroulé en un rouleau de bande.
  2. Procédé selon la revendication 1, caractérisé en ce que l'application de la peinture en poudre est directement effectuée sur le feuillard au moyen d'une extrudeuse.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la peinture en poudre à écoulement libre appliquée est répartie et pressée sur le feuillard au moyen de rouleaux.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'apport de chaleur nécessaire pour la fluidification et le durcissement de la couche de peinture en poudre appliquée est assuré par un rayonnement infrarouge moyen.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que, lors de l'écoulement du feuillard revêtu, une feuille de papier continu de séparation est enroulée en même temps que le feuillard.
  6. Dispositif pour la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 5, avec un poste de maintien et de déroulement de feuillard (1), un poste de prétraitement (5), un poste de séchage (8), un poste d'application de peinture en poudre (11), un poste de répartition de peinture en poudre et de lissage de surface (13), un poste de refroidissement (17) et un poste d'enroulement de feuillard (4), caractérisé en ce que le poste d'application de peinture en poudre présente une extrudeuse (11) pour la peinture en poudre thermodurcissable avec application directe de la peinture en poudre à l'état ramolli sur le feuillard (3) au moyen d'une ou de plusieurs filières (12), et en ce qu'il est prévu, entre le poste de répartition de peinture en poudre et de lissage de surface (13) et le poste de refroidissement (17), un poste de post-traitement et de durcissement (15).
  7. Dispositif selon la revendication 6, caractérisé en ce qu'il est prévu, entre le poste de prétraitement (5) et le poste de séchage (8), des rouleaux exprimeurs (7) pour éliminer l'eau de surface.
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que le poste de prétraitement (5) présente une chambre de passage avec buses de projection (6), qui peuvent être raccordées au choix à une source de liquide de nettoyage ou de traitement et à une source de liquide de rinçage.
  9. Dispositif selon l'une quelconque des revendications 6 à 8, caractérisé en ce que le poste de séchage (8) présente une chambre de passage avec radiateurs à rayons infrarouges (9) et buses de projection d'air (10).
  10. Dispositif selon l'une quelconque des revendications 6 à 9, caractérisé en ce que l'extrudeuse (11) présente une filière plate (12) qui débouche directement au-dessus de la bande (3) en mouvement.
  11. Dispositif selon l'une quelconque des revendications 6 à 9, caractérisé en ce que l'extrudeuse (11) présente plusieurs filières disposées les unes à côté des autres, et qui débouchent directement au-dessus du feuillard (3) en mouvement.
  12. Dispositif selon l'une quelconque des revendications 6 à 11, caractérisé en ce que le poste de répartition de peinture en poudre et de lissage de surface (13) présente au moins une paire de rouleaux (14), les rouleaux situés de manière opposée pressant des deux côtés sur le feuillard (3).
  13. Dispositif selon l'une quelconque des revendications 6 à 12, caractérisé en ce que le poste de post-traitement et de durcissement (15) présente une chambre de passage avec radiateurs à rayons infrarouges (16).
EP89121340A 1988-11-17 1989-11-17 Procédé et appareil pour enduire une tôle avec une peinture en poudre Revoked EP0369477B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883838928 DE3838928A1 (de) 1988-11-17 1988-11-17 Verfahren zum beschichten von bahnfoermigen bandblechen mit pulverlack und vorrichtung zur durchfuehrung des verfahrens
DE3838928 1988-11-17

Publications (3)

Publication Number Publication Date
EP0369477A2 EP0369477A2 (fr) 1990-05-23
EP0369477A3 EP0369477A3 (fr) 1991-01-23
EP0369477B1 true EP0369477B1 (fr) 1993-09-29

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ID=6367367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89121340A Revoked EP0369477B1 (fr) 1988-11-17 1989-11-17 Procédé et appareil pour enduire une tôle avec une peinture en poudre

Country Status (3)

Country Link
EP (1) EP0369477B1 (fr)
DE (1) DE3838928A1 (fr)
DK (1) DK575189A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8367978B2 (en) 2006-10-05 2013-02-05 Magna International Inc. Hybrid infrared convection paint baking oven and method of using the same
KR101353241B1 (ko) 2011-12-28 2014-01-20 주식회사 포스코 고속의 금속 스트립의 생산공정과 직결한 연속 수지코팅 방법 및 이를 이용한 연속 수지코팅 시스템
US11229925B2 (en) 2020-03-12 2022-01-25 Ayotte Techno-Gaz Inc. System and process for curing a wet coating applied to a substrate

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029985A1 (de) * 1990-09-21 1992-03-26 Bohnacker Tegometall Verfahren zum pulverbeschichten von metalloberflaechen
GB9214516D0 (en) * 1992-07-08 1992-08-19 Courtaulds Coatings Holdings Coating process
JP3939339B2 (ja) * 1992-07-08 2007-07-04 ピーピージー インダストリーズ オハイオ，インコーポレイテッド コーティング方法と組成物
WO1996020086A1 (fr) * 1994-12-23 1996-07-04 Sms Schloemann-Siemag Aktiengesellschaft Procede de recouvrement d'une ou de deux faces de feuillards metalliques avec une resine synthetique duroplastique extrudee
DE29702967U1 (de) * 1997-02-20 1997-05-07 Vollmer, Harald, 77716 Hofstetten Vorrichtung zur Herstellung einer marmorartigen Oberflächenimitation, insbesondere für pulverbeschichtete metallische Oberflächen
US6309492B1 (en) * 1998-09-16 2001-10-30 Marc A. Seidner Polymer fill coating for laminate or composite wood products and method of making same
DE19921041A1 (de) 1999-05-07 2000-11-09 Hymmen Theodor Gmbh Verfahren zum Wechsel des Abzuges einer Decklagenbahn von einer Produktionsrolle zu einer Vorratsrolle
ES2267545T3 (es) 1999-05-26 2007-03-16 Basf Corporation Provision de ripias metalicas para techado y metodo de fabricacion.
DE19933100A1 (de) * 1999-07-15 2001-01-18 Hymmen Theodor Gmbh Verfahren und Vorrichtung zum Beschichten von Werkstücken mit Pulverlacken
DE19962021A1 (de) * 1999-12-22 2001-06-28 Volkswagen Ag Verfahren zur Erzeugung einer Beschichtung auf einem Bauteil
AUPQ549000A0 (en) * 2000-02-08 2000-03-02 Bhp Steel (Jla) Pty Limited Coating method
DE20020547U1 (de) * 2000-09-29 2001-06-13 Advanced Photonics Technologies AG, 83052 Bruckmühl Vorrichtung zur Herstellung eines von Oberflächenverunreinigungen freien Produktes
CA2585971A1 (fr) 2004-11-01 2006-05-11 Asahi Kasei Chemicals Corporation Sac facile a ouvrir
DE102011100690A1 (de) * 2011-05-05 2012-11-08 Asis Gmbh Verfahren und Vorrichtung zum Lackieren

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DE2706328A1 (de) * 1977-02-15 1978-08-17 Glyco Metall Werke Verfahren und vorrichtung zum kontinuierlichen herstellen eines druckbestaendigen schichtwerkstoffes mit metallischem oder nicht metallischem traegermaterial und darauf angebrachter kunststoff-schicht

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BE622883A (fr) * 1961-09-29 1963-01-16
US4443491A (en) * 1982-06-10 1984-04-17 Acumeter Laboratories, Inc. Method of and apparatus for producing adhesive-coated sheet materials usable with radiation-cured silicone release coatings and the like
DE8421202U1 (de) * 1984-07-16 1985-04-11 E. + K. Hasenmüller oHG Papierwarenfabrik, 8000 München Extrusionsbeschichtete traegermaterialbahn
JPS6297676A (ja) * 1985-10-24 1987-05-07 Nippon Parkerizing Co Ltd 塗装前処理方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2706328A1 (de) * 1977-02-15 1978-08-17 Glyco Metall Werke Verfahren und vorrichtung zum kontinuierlichen herstellen eines druckbestaendigen schichtwerkstoffes mit metallischem oder nicht metallischem traegermaterial und darauf angebrachter kunststoff-schicht

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8367978B2 (en) 2006-10-05 2013-02-05 Magna International Inc. Hybrid infrared convection paint baking oven and method of using the same
KR101353241B1 (ko) 2011-12-28 2014-01-20 주식회사 포스코 고속의 금속 스트립의 생산공정과 직결한 연속 수지코팅 방법 및 이를 이용한 연속 수지코팅 시스템
US11229925B2 (en) 2020-03-12 2022-01-25 Ayotte Techno-Gaz Inc. System and process for curing a wet coating applied to a substrate

Also Published As

Publication number Publication date
DE3838928A1 (de) 1990-05-23
EP0369477A3 (fr) 1991-01-23
DK575189A (da) 1990-05-18
DK575189D0 (da) 1989-11-16
EP0369477A2 (fr) 1990-05-23

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