EP0369477A2 - 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
EP0369477A2
EP0369477A2 EP89121340A EP89121340A EP0369477A2 EP 0369477 A2 EP0369477 A2 EP 0369477A2 EP 89121340 A EP89121340 A EP 89121340A EP 89121340 A EP89121340 A EP 89121340A EP 0369477 A2 EP0369477 A2 EP 0369477A2
Authority
EP
European Patent Office
Prior art keywords
station
powder coating
strip
strip plate
sheet metal
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
EP89121340A
Other languages
German (de)
English (en)
Other versions
EP0369477B1 (fr
EP0369477A3 (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(A2) "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 invention also relates to an apparatus for performing the method.
  • solid resin, hardener, coloring pigments, additives and extenders are mixed, plasticized in an extruder and discharged from the extruder, whereupon the strand-like material emerging from the extruder Material 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. Objects with finite dimensions are usually coated. If endless tapes that are to be unwound from a tape roll are now to be coated with powder coatings, then if a rational production is to be aimed for, which requires high tape speeds, a great many powder spray guns are necessary. The powdery masses emerging from the powder spray guns, which do not stick to the belt, must be vacuumed off again, which can lead to non-uniform powder distributions on the belt in the case of large belt widths due to the high suction speed required.
  • 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.
  • the sheet-like strip is first pretreated and dried, that the powder coating is in a flowable state on the moving strip at a temperature which is below the reaction temperature of the hardener, 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 with large bandwidths in the dry powdery state because of the necessary suction, with a dry powder coating these difficulties increase with increasing bandwidth and increasing transport speed of the strip plate.
  • the present method therefore 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 that 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.
  • the device for carrying out the method comprises a strip plate holding and unwinding station, a pretreatment station, a drying station, an extruder for the powder coating with direct powder coating application to the strip plate by means of one or more nozzles, a powder coating distribution and surface smoothing station, a post-treatment and curing station, a cooling station and a coil winding station.
  • Squeeze rollers for squeezing 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 plate 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 ge Dried sheet metal 3 then arrives at an extruder 11 which is equipped with a slot die 12 which opens directly above the sheet metal 3 and applies the plastic material plasticized in the extruder directly to the sheet metal 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 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 hardening of this powder coating layer activates the hardener, so that after the powder coating material has been distributed, it hardens and dries.
  • the strip plate then 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 sheet coated in this way is wound up in the winding station 4 to form a roll of tape, a release paper being pulled off a roll of tape 19 and also wrapped between the individual windings of the strip sheet 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)
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 true EP0369477A2 (fr) 1990-05-23
EP0369477A3 EP0369477A3 (fr) 1991-01-23
EP0369477B1 EP0369477B1 (fr) 1993-09-29

Family

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 (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994001224A2 (fr) * 1992-07-08 1994-01-20 Courtaulds Coatings (Holdings) Limited Procede de revetement et compositions
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
WO2000015357A2 (fr) * 1998-09-16 2000-03-23 Seidner Marc A Revetement de remplissage polymere pour articles en bois lamines ou composites et procede de fabrication desdits articles
WO2000071834A3 (fr) * 1999-05-26 2001-09-27 Basf Corp Charge de bardeaux metalliques de couverture et procede de fabrication associe
ES2164607A1 (es) * 1999-07-15 2002-02-16 Hymmen Theodor Procedimiento y dispositivo para el recubrimiento de piezas con lacas en polvo.
WO2002026406A1 (fr) * 2000-09-29 2002-04-04 Advanced Photonics Technologies Ag Procede de realisation d'un produit exempt d'impuretes superficielles
KR100309392B1 (ko) * 1992-07-08 2002-05-30 리타 버어그스트롬 코팅공정및코팅조성물
EP1255617A1 (fr) * 2000-02-08 2002-11-13 Bhp Steel (Jla) Pty. Ltd. Procede de revetement
US6488800B1 (en) 1999-05-07 2002-12-03 Firma Theodor Hynmen Method for changing pulling off a cover web of a production roll to a storing roll
WO2006049070A1 (fr) 2004-11-01 2006-05-11 Asahi Kasei Chemicals Corporation Sac facile à ouvrir

Families Citing this family (7)

* 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
DE29702967U1 (de) * 1997-02-20 1997-05-07 Vollmer, Harald, 77716 Hofstetten Vorrichtung zur Herstellung einer marmorartigen Oberflächenimitation, insbesondere für pulverbeschichtete metallische Oberflächen
DE19962021A1 (de) * 1999-12-22 2001-06-28 Volkswagen Ag Verfahren zur Erzeugung einer Beschichtung auf einem Bauteil
US8367978B2 (en) 2006-10-05 2013-02-05 Magna International Inc. Hybrid infrared convection paint baking oven and method of using the same
DE102011100690A1 (de) * 2011-05-05 2012-11-08 Asis Gmbh Verfahren und Vorrichtung zum Lackieren
KR101353241B1 (ko) 2011-12-28 2014-01-20 주식회사 포스코 고속의 금속 스트립의 생산공정과 직결한 연속 수지코팅 방법 및 이를 이용한 연속 수지코팅 시스템
EP4013590B1 (fr) 2020-03-12 2023-07-19 Ayotte Techno-Gaz Inc. Système et procédé permettant le durcissement d'un revêtement humide appliqué sur un substrat

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE622883A (fr) * 1961-09-29 1963-01-16
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
EP0096951A2 (fr) * 1982-06-10 1983-12-28 Acumeter Laboratories Inc. Méthode et appareil pour produire des matières en feuilles revêtues d'adhèsif utilisables avec des couches pelables en silicone réticulé par radiation et similaire
JPS6297676A (ja) * 1985-10-24 1987-05-07 Nippon Parkerizing Co Ltd 塗装前処理方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8421202U1 (de) * 1984-07-16 1985-04-11 E. + K. Hasenmüller oHG Papierwarenfabrik, 8000 München Extrusionsbeschichtete traegermaterialbahn

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE622883A (fr) * 1961-09-29 1963-01-16
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
FR2380134A1 (fr) * 1977-02-15 1978-09-08 Glyco Metall Werke Procede et appareil pour la fabrication continue d'un materiau stratifie resistant a la compression
EP0096951A2 (fr) * 1982-06-10 1983-12-28 Acumeter Laboratories Inc. Méthode et appareil pour produire des matières en feuilles revêtues d'adhèsif utilisables avec des couches pelables en silicone réticulé par radiation et similaire
JPS6297676A (ja) * 1985-10-24 1987-05-07 Nippon Parkerizing Co Ltd 塗装前処理方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 11, Nr. 307 (C-450)[2754], 7. Oktober 1987; & JP-A-62 97 676 (NIPPON PARKERIZING CO., LTD) 07-05-1987 *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100309392B1 (ko) * 1992-07-08 2002-05-30 리타 버어그스트롬 코팅공정및코팅조성물
WO1994001224A3 (fr) * 1992-07-08 1994-11-10 Courtaulds Coatings Holdings Procede de revetement et compositions
US5639514A (en) * 1992-07-08 1997-06-17 Courtaulds Coatings (Holdings) Limited Process for coating a metal substrate for packaging end use
AU688731B2 (en) * 1992-07-08 1998-03-19 Ppg Industires Ohio, Inc. Coating process and compositions
WO1994001224A2 (fr) * 1992-07-08 1994-01-20 Courtaulds Coatings (Holdings) Limited Procede de revetement et compositions
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
WO2000015357A2 (fr) * 1998-09-16 2000-03-23 Seidner Marc A Revetement de remplissage polymere pour articles en bois lamines ou composites et procede de fabrication desdits articles
WO2000015357A3 (fr) * 1998-09-16 2000-05-25 Marc A Seidner Revetement de remplissage polymere pour articles en bois lamines ou composites et procede de fabrication desdits articles
US6488800B1 (en) 1999-05-07 2002-12-03 Firma Theodor Hynmen Method for changing pulling off a cover web of a production roll to a storing roll
US6485781B2 (en) 1999-05-26 2002-11-26 Basf Corporation Metal roofing shingle stock and method for making it
WO2000071834A3 (fr) * 1999-05-26 2001-09-27 Basf Corp Charge de bardeaux metalliques de couverture et procede de fabrication associe
US6540829B2 (en) 1999-05-26 2003-04-01 Basf Corporation Metal roofing shingle stock and method for making it
AU778541B2 (en) * 1999-05-26 2004-12-09 Basf Corporation Metal roofing shingle stock and method for making it
ES2164607A1 (es) * 1999-07-15 2002-02-16 Hymmen Theodor Procedimiento y dispositivo para el recubrimiento de piezas con lacas en polvo.
EP1255617A1 (fr) * 2000-02-08 2002-11-13 Bhp Steel (Jla) Pty. Ltd. Procede de revetement
EP1255617A4 (fr) * 2000-02-08 2003-07-02 Bhp Steel Ltd Procede de revetement
WO2002026406A1 (fr) * 2000-09-29 2002-04-04 Advanced Photonics Technologies Ag Procede de realisation d'un produit exempt d'impuretes superficielles
WO2006049070A1 (fr) 2004-11-01 2006-05-11 Asahi Kasei Chemicals Corporation Sac facile à ouvrir

Also Published As

Publication number Publication date
DK575189D0 (da) 1989-11-16
DE3838928A1 (de) 1990-05-23
DK575189A (da) 1990-05-18
EP0369477B1 (fr) 1993-09-29
EP0369477A3 (fr) 1991-01-23

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