EP2965827B1 - Procede de revetement de bande destine a la fabrication d'un semi-produit dote d'une structure de surface - Google Patents

Procede de revetement de bande destine a la fabrication d'un semi-produit dote d'une structure de surface Download PDF

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Publication number
EP2965827B1
EP2965827B1 EP15173796.2A EP15173796A EP2965827B1 EP 2965827 B1 EP2965827 B1 EP 2965827B1 EP 15173796 A EP15173796 A EP 15173796A EP 2965827 B1 EP2965827 B1 EP 2965827B1
Authority
EP
European Patent Office
Prior art keywords
primer
structured
structured primer
coating material
coating
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
EP15173796.2A
Other languages
German (de)
English (en)
Other versions
EP2965827A3 (fr
EP2965827A2 (fr
Inventor
Dirk HOLSCHUMACHER
Andreas Meschede
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.)
ThyssenKrupp Steel Europe AG
ThyssenKrupp AG
Original Assignee
ThyssenKrupp Steel Europe AG
ThyssenKrupp 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
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Application filed by ThyssenKrupp Steel Europe AG, ThyssenKrupp AG filed Critical ThyssenKrupp Steel Europe AG
Publication of EP2965827A2 publication Critical patent/EP2965827A2/fr
Publication of EP2965827A3 publication Critical patent/EP2965827A3/fr
Application granted granted Critical
Publication of EP2965827B1 publication Critical patent/EP2965827B1/fr
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
    • B05D7/16—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 using synthetic lacquers or varnishes
    • 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
    • B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
    • 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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/02—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a matt or rough 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
    • B05D2252/00—Sheets
    • B05D2252/02—Sheets of indefinite length

Definitions

  • the present invention relates to a coil coating method for producing a semi-finished product having a surface structure.
  • the coil coating or coil coating is an established method for upgrading a metallic strip with an organic coating to provide a semi-finished, the further processed, for example, as a trapezoidal sheet in facade construction, the garage door or as a panel in the home appliance area is used.
  • the coating is superficially used as corrosion protection and aesthetics.
  • the prior art provides for designing a primer arranged under a last covering layer such that it predetermines the surface structure of the semifinished product.
  • special structure primers are used.
  • the structure of the coating process is self-organized, for example due to inhomogeneous flow, which is then overcoated in a subsequent process.
  • the self-organized structural adjustment is difficult to control and can be influenced, for example, by the degree of dressing (roughness) and the metallic substrate, quality fluctuations of the material used to structure the primer, or slight temperature fluctuations. As a result, deviations from the desired structure often occur.
  • a further disadvantage is that the known structuring measures of the primer allow only little creative freedom, for example with regard to wavelength, aspect ratio or structural height of the three-dimensional surface structure.
  • WO 2007/104069 A2 a method for producing a non-slip coating on a band-shaped carrier is known in which a three-dimensional, structured cover layer is applied to a primer layer by screen printing.
  • Three-dimensional color patterns which can be produced by means of screen printing, are as such from the DE 38 23 742 A1 known.
  • the reproducibility and the design freedom in the design of the three-dimensional surface structure is improved by the use of the screen printing method in the three-dimensional shaping of the structured primer and / or lacquer. It proves to be particularly advantageous to dispense with the shaping of self-organizing structure primer whose shape depends on several influences and is correspondingly difficult to control.
  • a strip-shaped flat product is continuously moved along a conveying direction on a printing device suitable for the screen printing method and provided with a flat, three-dimensionally shaped structured primer and / or lacquer.
  • the metallic flat product is preferably a flat material, in particular of an aluminum or steel material, with a thickness between 0.2 and 3.0 mm.
  • the coating from the flat product makes a semifinished product which, for example, can be cut to a useful component and / or formed in a subsequent production step.
  • the useful components realized by the production step are then used, for example, as a trapezoidal sheet or profiled sheet in façade construction or as a garage door.
  • a further field of application are household appliances, to the disguise of the useful components are used.
  • the metallic flat product is unwound from a roll to provide the coating process. Following the coating process, the flat product upgraded by the coating is rewound as a semifinished product for further transport onto another or the same roll.
  • a method step c the structured primer is cured.
  • the structured primer and / or lacquer solidified in an oven to realize a rigid three-dimensional surface structure.
  • the structured primer and / or paint is applied by a screen-printed liquid, preferably viscous primer or. Paint material formed by hardening and the three-dimensional shape of the structured primer and / or paint is advantageously preserved. It is conceivable that in method step c the structured primer and / or lacquer is cooled. If, for example, a further refinement of the metallic flat product takes place in the continuous process, it is necessary to cool the metallic flat product to a corresponding processing temperature.
  • the structured primer and / or lacquer is at least partially overcoated, preferably at least partially overcoated.
  • the previously applied primer and / or paint has a multiple function here. It serves as a primer for a topcoat, is structurant and protects against corrosion.
  • the topcoat provides a closed surface, color appearance, processing resistance (abrasion resistant and / or chemical resistant) and additional corrosion protection.
  • a structured primer having an average structural height of more than 1 ⁇ m, preferably between 5 and 15 ⁇ m (dried structure), is produced.
  • the screen printing process makes it possible to set more precise average structural heights.
  • it is provided to achieve higher aspect ratios by the screen printing method in comparison to the prior art. This increases the design freedom in the design of the three-dimensional surface structure over the prior art.
  • the structured primer and / or paint is applied to an at least partially hot-dip galvanized or at least partially electrolytically galvanized metallic flat product.
  • an organically based topcoat or a film for forming the topcoat is used.
  • the flat product can be protected in an advantageous manner, whereby the manufactured semi-finished product against external influences, eg. B. withstand certain weather conditions.
  • the metallic flat product is cleaned and / or galvanized in a preparation step.
  • the metallic flat product is freed of oil and fats in order to guarantee a successful and permanent application of the structured primer and / or paint can.
  • a specific screen size, screen speed and / or screen template is used for the three-dimensional shaping of the structured primer and / or paint.
  • the three-dimensional shaping can be controlled in a simple manner in the screen printing process.
  • the template is configured as a type (projected) negative to the desired three-dimensional surface structure, wherein the template has recess at the locations below which elevations of the structured primer and / or paint are to be formed on the flat product.
  • a primer or Paint material with a certain viscosity, grain size and / or a specific surface-specific chemical composition is used.
  • the three-dimensional shaping can be advantageously achieved by the appropriate choice of primer or. Control or control paint material in combination with the matched screen printing parameters.
  • the screen printing process is repeated for the three-dimensional shaping of the structured primer / lacquer.
  • the structured primer and / or lacquer is realized in a layer-on-layer application and the screen or the template is changed in order to achieve a desired structuring effect in the three-dimensional shaping of the structured primer and / or lacquer , This further enhances the creative freedom of design.
  • a screen screen printing method is used in method step b.
  • an amplitude- or frequency-modulated screen is implemented in screen screen printing in order to produce the desired three-dimensional shape of the structured primer and / or paint.
  • the method step a, the method step b, the method step c and / or the method step d as an intermediate step for example in the form of a process step a ', a process step b', a process step c 'and / or a process steps d 'during the process, in particular several times, can be performed, in particular, by the alphabetical order of the method steps, no time sequence is determined.
  • Another object of the present invention is a production line for strip coating of a metallic flat product, wherein the manufacturing plant has at least one screen printing device for producing a structured primer and / or paint with a three-dimensional shape on the metallic flat product, wherein the screen printing device, a method for producing a Semi-finished product with a three-dimensional surface structure according to one of the methods described above is feasible.
  • such a production facility has the advantage that it can produce semi-finished products whose three-dimensional surface structure is reproducibly applied to the flat product. Furthermore, the design freedom for the design of the three-dimensional surface structure in comparison to the prior art, no further limits.
  • a further subject of the present invention is a semifinished product, wherein the semifinished product has a metallic flat product on which a structured primer and / or lacquer has been applied by a coil coating method as described above.
  • Such a semifinished product is distinguished from the prior art by its three-dimensional surface structure, which is reproducibly applied to the flat product and can be made more flexible than the three-dimensional surface structures known from the prior art with regard to the average structural height, the wavelength and the aspect ratio.
  • FIG. 1 schematically illustrates a coil coating method 10 according to a first exemplary embodiment of the present invention.
  • the coil coating method 10 is formed as a band formed metallic flat product 1 with a, preferably organic, coating to enhance the flat product 1 by the coating in its quality and in its visual appearance.
  • the intention is to produce a semifinished product using the strip coating method 10, which is then further processed as a blank and / or by forming steps into a useful component in a production step subsequent to the strip coating method 10.
  • This useful component can in turn be used, for example, as a trapezoidal sheet in facade construction or as a garage door. It is also conceivable that the finished semifinished product is processed into a panel for a household appliance.
  • the preferably organic coating serves, inter alia, as a corrosion protection and processing aid. Furthermore, a desired optical and / or haptic impression in the finished semi-finished product should be awakened by the coating.
  • the manufactured semi-finished product has a three-dimensional surface structure or topography, which is preferably realized within the scope of the coil coating method 10. It is also conceivable that the shape of the three-dimensional surface structure specifically controls properties of the surface of the finished semifinished product, such as its adhesiveness, and in particular individually to the area of use of the useful component produced from the semifinished product is adjusted.
  • the prior art knows the surface structuring a self-organizing structure primer, which is applied to the metallic flat product 1 and then painted over.
  • the self-organization depends on so many, usually only with great effort to control influences from that in practice by the self-organization no reproducible surface structuring can be generated and the material can be used only in batches.
  • the band coating methods 10 known from the prior art are limited in terms of their design freedom, for example with regard to a wavelength, an aspect ratio or a structural height of the surface structure produced.
  • the finished semi-finished product then consists, for example, of a steel substrate formed as a metallic flat product 1, a zinc layer arranged above it, which in turn can optionally be covered by a bonding agent.
  • the adhesion promoter or the zinc layer is then followed by the structure and / or paint primer which is sealed by at least one cover layer.
  • a structured primer and / or paint 2 by means of a screen printing process on a metallic flat product 1, which is designed in particular as a band is applied.
  • the screen printing method for three-dimensional shaping of the structured primer and / or paint 2 is used after the metallic flat product has been provided.
  • the structured primer and / or lacquer 2 produced by the screen printing process then preferably has an average structural height of more than 1 ⁇ m, preferably between 5 and 15 ⁇ m (dried structure). In particular, it is provided that the liquid primer or.
  • Paint material for example, stored in a reservoir 7 and is supplied to the screen printing process via a feed line 15 of the screen printing roller 4.
  • the screen printing drum rotates at a rotational speed, wherein the rotational speed is matched with a speed of the linearly moving flat product.
  • the screen printing cylinder rotates clockwise or counterclockwise.
  • a counter-pressure roller 16 may be provided on the opposite side of the screen-printing roller 4, the metallic flat product 1 being passed between itself and the screen-printing roller 4. If the application of a structured primer and / or lacquer 2 on both sides of the metallic flat product 1 is desired, the counterpressure roller 16 can be replaced by a further screen-printing roller.
  • the screen-printing roller 4 comprises apertures in the manner of a template, which defines the configuration of the structured primer and / or lacquer 2. Furthermore, it is conceivable that by a pressing pressure, ie a pressure with which the liquid primer or. Paint material is pressed through the screen printing roller 4, (rotational) speed and / or distance of the screen printing roller 4 from the metallic flat product 1 it is possible to control the three-dimensional shape of the structured primer and / or paint 2 at least partially.
  • a structured primer and / or lacquer 2 is realized by a layer-by-layer application, wherein each layer takes place by application by screen printing. In such a layer-by-layer application, it is conceivable to change the screen roller 4 after each layer in order to achieve a specific three-dimensional shape of the structured primer and / or paint 2. Furthermore, it is preferably provided that the three-dimensional shaping of the structured primer and / or lacquer 2 is also determined by material properties of the primer or lacquer material.
  • the three-dimensional shape of the structured primer and / or lacquer 2 is also determined by a viscosity, a surface-specific chemical composition and / or a grain size of the primer or lacquer material and selected according to the desired form of the structured primer and / or lacquer 2. It is further provided that, in a method step c, the structured primer and / or lacquer 2 produced by the screen printing method is hardened with its three-dimensional shape, preferably when baked in an oven 8, and solidifies as a result. For further processing, the metallic flat product 1 is subsequently cooled.
  • the structured primer and / or lacquer 2 is coated with a preferably organic cover layer in order to further refine the structured primer and / or lacquer 2 and the metallic flat product 1.
  • the cover layer is applied in coil coating on the structured primer and / or lacquer 2.
  • FIG. 2 1 schematically shows a manufacturing plant in which a coil coating process 10 according to a second exemplary embodiment of the present invention is feasible.
  • the strip-shaped flat product 1 is unrolled from a roll 21 in order to provide it to the coating method 10.
  • the metallic flat product 1 is a tape, in particular of an aluminum material or a steel material, with a thickness between 0.2 to 3 mm.
  • the strip-shaped flat product 1 in the coating process 10 is moved continuously along a conveying direction A. It is conceivable that the flat product 1 is cleaned and / or galvanized during transport in the production plant in a preparatory step, before it is provided with the structured primer and / or paint 2 applied by the screen printing process.
  • the flat product 1 is first transported in a preparation step to one or more devices 12 for cleaning and / or galvanizing. Furthermore, accumulators 11 are provided in the production line, which store the band-shaped flat product 1 and allow continuous application.
  • the strip-shaped flat product 1 is conveyed in such a way that always a part of the metallic flat product 1 of a screen printing device 13 for the screen printing process is continuously provided.
  • the flat product equipped with the structured primer and / or lacquer 2 is fed in the production line to an oven 8 for solidifying the structured primer / lacquer 2 with subsequent cooling.
  • the production plant 14 further comprises a coater 17 for coating or coating (coil coating) the structured primer and / or lacquer 2 with a topcoat or topcoat.
  • a coater 17 for coating or coating (coil coating) the structured primer and / or lacquer 2 with a topcoat or topcoat.
  • the strip-shaped flat product 1 is passed through a further oven 18 in which the organic coating is dried, before the strip-shaped flat product 1 is continuously fed to a laminating device 19 in which the finished surface is coated with a film, preferably with a protective film. is laminated.
  • the metallic flat product 1 can be supplied to a cooling device.
  • the metallic flat product 1 to be equipped on both sides with a structured primer and / or lacquer 2 applied by a screen printing process in the coating process 10.
  • parameters which influence the coating method 10 such as a drying temperature, a conveying speed, the viscosity of the primer or paint material or the substrate thickness, are kept substantially constant over a relatively long period of time become.

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

Claims (13)

  1. Procédé de revêtement de bandes (10) destiné à la fabrication d'un produit semi-fini ayant une structure de surface tridimensionnelle, qui comporte au moins les étapes de procédé suivantes :
    - fournir un produit plat métallique lors d'une étape de procédé a,
    - appliquer un primaire et/ou une laque structuré(e) (2) ayant une forme tridimensionnelle sur le produit plat métallique (1) lors d'une étape de procédé b, dans lequel un procédé de sérigraphie est utilisé pour produire le primaire et/ou la laque structuré(e) (2), dans lequel, lors d'une étape de procédé d, le primaire et/ou la laque structuré(e) (2) est revêtu(e) au moins partiellement d'une couche de recouvrement.
  2. Procédé de revêtement de bandes (10) selon la revendication 1, dans lequel, lors d'une étape de procédé c, le primaire et/ou la laque structuré(e) (2) est durci(e).
  3. Procédé de revêtement de bandes (10) selon l'une des revendications précédentes, dans lequel, lors d'une étape de procédé d, le primaire et/ou la laque structuré(e) (2) est au moins partiellement revêtue de laque.
  4. Procédé de revêtement de bandes (10) selon l'une des revendications précédentes, dans lequel, lors de l'étape de procédé b, un primaire et/ou une laque structuré(e) (2) ayant une hauteur moyenne de structure supérieure à 1 µm, de préférence entre 5 et 15 µm, est produit(e).
  5. Procédé de revêtement de bandes (10) selon l'une des revendications précédentes, dans lequel le primaire structuré (2) est appliqué sur un produit plat métallique (1) au moins partiellement galvanisé à chaud ou au moins partiellement galvanisé par électrolyse.
  6. Procédé de revêtement de bandes (10) selon l'une des revendications précédentes, dans lequel, lors de l'étape de procédé d, une laque de recouvrement à base organique ou un film est utilisé pour former la couche de recouvrement.
  7. Procédé de revêtement de bandes (10) selon l'une des revendications précédentes, dans lequel le produit plat métallique (1) est nettoyé et/ou galvanisé lors d'une étape de préparation.
  8. Procédé de revêtement de bandes (10) selon l'une des revendications précédentes, dans lequel, lors de l'étape de procédé b, une taille de tamis, une vitesse de tamisage et/ou un gabarit de tamisage déterminé est utilisé pour la mise en forme tridimensionnelle du primaire et/ou de la laque structuré(e) (2).
  9. Procédé de revêtement de bandes (10) selon l'une des revendications précédentes, dans lequel, lors de l'étape de procédé b, pour la mise en forme tridimensionnelle du primaire et/ou de la laque structuré(e) (2), un matériau de primaire et/ou de laque ayant une viscosité et une granulométrie déterminées et/ou une composition chimique de surface déterminée est utilisé.
  10. Procédé de revêtement de bandes (10) selon l'une des revendications précédentes, dans lequel le procédé de sérigraphie est répété pour la mise en forme tridimensionnelle du primaire structuré (2).
  11. Procédé de revêtement de bandes (10) selon l'une des revendications précédentes, dans lequel, lors de l'étape de procédé b, un procédé de sérigraphie à trame est utilisé.
  12. Installation de production (14) pour le revêtement de bandes d'un produit plat métallique (1), dans laquelle l'installation de production (14) comporte au moins un dispositif de sérigraphie (13) pour la fabrication d'un primaire et/ou d'une laque structuré(e) (2) avec une mise en forme tridimensionnelle sur le produit plat métallique (1) et au moins un dispositif de revêtement (17) pour l'application sur le primaire et/ou la laque structuré(e) (2) d'une couche de recouvrement, dans laquelle le dispositif de sérigraphie (13) permet de mettre en oeuvre un procédé de fabrication d'un produit semi-fini ayant une structure de surface tridimensionnelle selon l'une des revendications précédentes.
  13. Produit semi-fini, dans lequel le produit semi-fini comprend un produit plat métallique (1) sur lequel est appliqué un primaire et/ou une laque structuré(e) (2) et dans lequel une couche de recouvrement est appliquée au moins partiellement, par un procédé de revêtement de bandes selon l'une des revendications 1 à 11, sur le primaire et/ou la laque structuré(e) (2).
EP15173796.2A 2014-07-08 2015-06-25 Procede de revetement de bande destine a la fabrication d'un semi-produit dote d'une structure de surface Revoked EP2965827B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014109548.0A DE102014109548A1 (de) 2014-07-08 2014-07-08 Bandbeschichtungsverfahren zur Herstellung eines Halbzeugs mit einer Oberflächenstruktur

Publications (3)

Publication Number Publication Date
EP2965827A2 EP2965827A2 (fr) 2016-01-13
EP2965827A3 EP2965827A3 (fr) 2016-03-30
EP2965827B1 true EP2965827B1 (fr) 2019-05-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15173796.2A Revoked EP2965827B1 (fr) 2014-07-08 2015-06-25 Procede de revetement de bande destine a la fabrication d'un semi-produit dote d'une structure de surface

Country Status (3)

Country Link
EP (1) EP2965827B1 (fr)
DE (1) DE102014109548A1 (fr)
RU (1) RU2664065C2 (fr)

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EP2965827A3 (fr) 2016-03-30
RU2664065C2 (ru) 2018-08-14
EP2965827A2 (fr) 2016-01-13
RU2015127359A3 (fr) 2018-07-24
RU2015127359A (ru) 2017-01-10

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