EP2786807B1 - Dispositif d'inertisation en présence d'un rayonnement UV dans des installations de passage ouvertes - Google Patents

Dispositif d'inertisation en présence d'un rayonnement UV dans des installations de passage ouvertes Download PDF

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Publication number
EP2786807B1
EP2786807B1 EP14000487.0A EP14000487A EP2786807B1 EP 2786807 B1 EP2786807 B1 EP 2786807B1 EP 14000487 A EP14000487 A EP 14000487A EP 2786807 B1 EP2786807 B1 EP 2786807B1
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European Patent Office
Prior art keywords
accordance
height
channel
segments
lamp
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EP14000487.0A
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German (de)
English (en)
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EP2786807A1 (fr
Inventor
Mehnert Prof.Dr. Reiner
Riedel Dr. Carsten
Rolf Dr. Schubert
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Iot - Innovative Oberflaechentechnologien GmbH
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Iot - Innovative Oberflachentechnologien GmbH
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Priority to PL14000487T priority Critical patent/PL2786807T3/pl
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    • 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
    • B05D3/04—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 exposure to gases
    • B05D3/0466—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 exposure to gases the gas being a non-reacting gas
    • 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
    • B05D3/04—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 exposure to gases
    • B05D3/0486—Operating the coating or treatment in a controlled atmosphere
    • 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
    • B05D3/06—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 exposure to radiation
    • B05D3/061—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 exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • 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
    • 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
    • B05D2252/04—Sheets of definite length in a continuous process

Definitions

  • the invention relates to a device for inerting the irradiation zone in oxygen-sensitive UV curing and -Sober lake ModelltechniksRISen, which take place in a continuous operation.
  • Oxygen-sensitive chemical and physical surface processes such as the photochemical polymerization of acrylate-based paints and their surface structuring by means of short-wave UV radiation, must be carried out in as low-oxygen atmosphere as possible in order to avoid such effects as Peroxyradikal- and ozone formation and energy losses.
  • inerting technologies are known to be used.
  • a reaction space with an inert gas such as nitrogen, argon or CO 2 , but preferably pure nitrogen, rinsed to displace atmospheric oxygen.
  • inerting technology in the field of UV curing is state of the art in order to obtain coatings of high quality.
  • Further advantages of inertization have been the ability to reduce the photoinitiator content by more than 80% and to save energy by reducing the electrical UV lamp power by 50%, or alternatively, increasing the product throughput speed as an option.
  • the residual oxygen content in the inert gas of the channel is meanwhile also measured and thus the inert gas feed is regulated.
  • the inert gas purging of the irradiation channel is a metastable aerodynamic system and not only the lowest possible residual oxygen content, but a largely homogeneous inert gas atmosphere is required, except for the retention of atmospheric oxygen in the channel constructive measures for a uniform inert gas and avoidance to meet flow profile disturbances in the channel.
  • the inert gas is fed through a so-called volume filling nozzle, which can also work on the basis of a porous gas distribution element over the entire channel width.
  • a so-called “squeegee” or “peeling nozzle” is used for better retention of the atmospheric oxygen and for “peeling off” the oxygen from the surface of the coating.
  • the amount of inert gas fed in must be matched to the throughput speed of the product - which is best regulated at a variable speed - in order to avoid a product outflow-side air inflow.
  • product inlet side gas barrier are usually a simple height-adjustable aperture over the entire channel width or even a labyrinth ( WO 2005 075111 A1 ) and product outlet side a rubber sealing lip, a brush element or also a labyrinth for a non-contact execution, wherein the labyrinths an inert gas feed and residual oxygen measurement can take place ( WO 2005 075111 A1 ).
  • the residual oxygen measurement in the inert gas of the irradiation zone is due to its large measuring range (1 ppm to> 21% O 2 ) and its short response time even to Inertgasmengenregelung.
  • the gas is continuously sucked through the measuring cell by means of a small gas pump via a tube probe in the channel ceiling - usually arranged in the middle of the channel.
  • UV inerting systems on the market function in principle, they are susceptible and inadequate with respect to the stability of the inert regime - laterally uniform residual oxygen concentration and small variations over time in the passage - as well as inert gas consumption.
  • Object of the present invention is therefore to propose a device for inerting the irradiation zone, with the lowest inert gas consumption, a stable and homogeneous inerting of the irradiation zone is achieved, so that UV curing and photochemical surface structuring can be done under technically advantageous conditions.
  • Essential inventive features are that the irradiation channel is used in a flat as possible embodiment, and thus a high relative velocity between the coated product surface and inert gas is formed, but does not affect the uniformity of the coating, so as to have a positive effect on the O 2 -Stoffübergangskostory and to achieve a rapid removal of the exchanged oxygen and at the same time to provide a directed inert gas flow, whereby vertical and horizontal turbulence, which can lead to air inflow, are largely excluded.
  • the device according to the invention has an inerted inlet section in front of the UV lamp with such a length that the required residence time in the inert gas atmosphere is available for removing oxygen from and from the coating, whereby such a flow zone also has a positive effect on the flow profile and thus affecting the uniformity of the residual oxygen distribution.
  • the product inlet and outlet side gap adjustment is matched in terms of resistance so that the outlet side, the larger gas barrier arises and thus the inert gas in countercurrent to the product conveying direction must emerge on the product side.
  • the product inlet side is a labyrinth, as in WO 2005 075111 A1 suggested, is not appropriate.
  • the adjustment of the residual oxygen level and the Inertgas kits results in a speed-dependent gap height of the inlet aperture, which recommends a speed-dependent control of the gap height analogous to the inert gas via the residual oxygen measurement.
  • the device according to the invention has a diffuser-like beveled inlet aperture, by means of which tear-off turbulences and dead zones are reduced, Furthermore, the device has a segmentation of the inlet aperture and the outlet barrier (sealing lip or labyrinth) in order to exclude lateral zones of lower resistance than on the product surface by adaptation to the product width and thus to counteract a negative influence on the gas flow in the channel and Heileinsaugerscheinept.
  • the nip side of the runner segments of a web equipment is provided with a soft sealing material such as felt or a special closed pored rubber lip to provide a better sealing effect on a chill roll, but to avoid web breakage through the segment when the web is running sideways.
  • a soft sealing material such as felt or a special closed pored rubber lip to provide a better sealing effect on a chill roll, but to avoid web breakage through the segment when the web is running sideways.
  • Another feature to solve the problem is the choice of a suitable transport system for cargo handling equipment and a coordinated effective number and arrangement of the inert gas feed nozzles. If e.g. For flat sheets, a closed conveyor belt is selected, then the tape should have the lowest possible surface roughness. For thicker plates, which can entrain a relatively large amount of air, it is recommended to use a roller conveyor or a rod or mesh belt and a bottom nozzle in the inlet region at generally lower conveyor speeds than 20 m / min.
  • An inerting device is used for pure UV coating curing on a film web with only one medium pressure mercury lamp of a specific electrical power of 200 W / cm.
  • the clear channel height is 10 mm and the clear channel width is 600 mm.
  • the 500 mm wide web passes through the device at 100 m / min.
  • 300 ppm residual oxygen content is registered at a nitrogen flow of 9 Nm 3 / h.
  • a minimum residence time of 250 ms would be required.
  • An attachment according to Fig. 2 is used for the physical matting of UV varnish-coated MDF sheets by means of 172 nm excimer photons and subsequent curing with long-wave UV light of a 160 W / cm medium pressure mercury lamp.
  • the clear Inertkanal altar is 30 mm and the clear channel width 1400 mm.
  • the plates with dimensions (LxWxH) 2000x1200x22 are moved at a speed of 10 m / min on a metal mesh belt through the VUV / UV system.
  • Microstructuring of the lacquer surface by photochemical microfilling is very sensitive to an inhomogeneous residual oxygen content in the irradiation zone, since the 172 nm photons are absorbed by oxygen under ozone formation and in the problem areas a VUV dose reduction occurs, which leads to structural influence and thus to visible local gloss differences.
  • the inertizing nitrogen is fed in via the excimer lamp (7), a fogging nozzle (4) and optionally an underfloor nozzle (5).
  • a fogging nozzle (4) for this purpose, the effect of a different length inlet zone and the inlet gap setting according to Fig. 3 demonstrated.
  • On the outlet side a sealing lip forms the nitrogen barrier.
  • the oxygen measuring point is located shortly before the excimer lamp.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Claims (14)

  1. Dispositif pour l'inertage de la zone d'irradiation lors de la réticulation par les UV et de la structuration superficielle photochimique de revêtements à base d'acrylate et de méthacrylate sur des substrats en forme de bandes ou de plaques, ayant particulièrement des exigences élevées à un niveau d'oxygène résiduels bas et régulier dans la distribution latérale, selon l'emploi < 100 ppm, < 50 ppm, < 10 ppm, dans un canal d'irradiation avec injection de gaz inerte, de préférence de l'azote pur. Il est composé d'un canal d'irradiation pour le durcissement d'UV ou pour la combinaison matage VUV excimer et durcissement UV avec une zone de départ (1), un dispositif de transport (2) ou un produits en bande (13), un orifice d'entrée (3), une buse d'injection (4), une buse de remplissage de volumes (6), une lampe excimer avec injection d'azote (7) via le plafond de la lampe, d'une lampe UV moyenne pression de mercure (8) avec un disque de quartz ou une unité LED UV (9), une sonde de mesure de l'oxygène résiduel avec détecteur (10) et, pour le revêtement des substrats en forme de plaques, une barrière à gaz côté sortie, conçue comme lèvre d'étanchéité ou brosse ou autres (11) ou, pour l'irradiation de produits en bande, comme labyrinthe (15),
    caractérisé par le fait
    que, pour réaliser une vitesse relative élevée entre la surface du produit (13) et le courant de gaz inerte sans dégrader le revêtement liquide, permettant ainsi d'éviter des turbulences et de garantir l'élimination de l'oxygène également de la surface (fig, 1), la construction aplatie du canal d'irradiation (1) dans l'installation en continue via la surface revêtue du produit (13) est conçue de manière à ce que la hauteur du canal soit réglable et puisse s'adapter à la hauteur du produit et à la consistance du revêtement et de manière à ce que l'orifice d'entrée (3) et la barrière à gaz côté sortie (11 ou 15) comprennent des segments réglables en hauteur (12 ou 16).
  2. Dispositif selon la revendication 1, caractérisé par le fait que, pour l'utilisation dans une installation de transfert de marchandises, le dispositif de transport (2) est une bande transporteuse ou un transporteur à rouleau.
  3. Dispositif selon la revendication 2, caractérisé par le fait que la bande transporteuse est perforée.
  4. Dispositif selon la revendication 2 ou 3, caractérisé par le fait que, pour l'utilisation dans une installation de transfert de marchandises, une buse sous-plancher (5) est placée dans la zone de départ (1).
  5. Dispositif selon la revendication 1 caractérisé par le fait que le zone de départ (1) importante pour l'inertage est configurée de manière à ce qu'un temps minimum d'arrêt soit garanti, 1 s pour l'installation de transfert de la marchandise et 0,3 s pour les installations de transport.
  6. Dispositif selon la revendication 1 caractérisé par le fait que, pour une répartition uniforme du gaz, toutes les buses (4, 5, 6 et 7) sont équipées d'élément de répartition poreux ou perforés de pression différentielle définie et un compartiment de pré-répartition.
  7. Dispositif selon la revendication 1 et 6 caractérisé par le fait que buse d'injection est placée de manière à ce qu'elle puisse agir dans un angle allant de 25° à 60° par rapport à la verticale, dans le sens inverse de la direction de déplacement du transport.
  8. Dispositif selon la revendication 1 caractérisé par le fait que les segments formant l'orifice d'entrée (3) soient chanfreinés en forme de diffuseur dans la direction du flux du gaz et dans le sens inverse du déplacement du produit.
  9. Dispositif selon la revendication 1 et 8 caractérisé par le fait que l'orifice d'entrée formé de segments (12) à hauteur réglables s'adapte à la largeur du produit grâce aux segments (12) à hauteur réglable.
  10. Dispositif selon la revendication 1 caractérisé par le fait que la hauteur de la fente d'entrée est réglée au moyen de l'orifice d'entrée formé de segments réglables en hauteur (12) selon la teneur en oxygène restant, en fonction de la vitesse et adapté au débit du gaz inerte.
  11. Dispositif selon la revendication 1 caractérisé par le fait que la barrière côté sortie (11 ou 15) formée à partir de segments (12) à hauteur réglable est adapté à la largeur du produit au moyen du réglage séparé de la hauteur des segments (12).
  12. Dispositif selon les revendications précédentes caractérisé par le fait que, pour les installations de transport, le canal d'irradiation, que ce soit pour le durcissement d'UV avec une lampe moyenne pression de mercure ou une unité LED ou pour le pour le matage VUV excimer dans une combinaison de lampe excimer et lampe moyenne pression de mercure ou une unité de LED, est ordonné autour d'un rouleau cylindrique, de préférence autour d'un rouleau de refroidissement. La surface des rouleaux forme ici le fond du canal et, avec cela, sous les lampes UV, le contre-orifice. Le canal est colmaté ici dynamiquement contre le rouleau (14).
  13. Dispositif selon la revendication 12 caractérisé par le fait que les parties inférieures des segments de l'orifice d'entrée sont établis avec un matériau étanche souple.
  14. Dispositif selon la revendication 13 caractérisé par le fait que le matériau étanche est formé en feutre ou avec une lèvre spéciale en caoutchouc à alvéoles fermées.
EP14000487.0A 2013-04-05 2014-02-12 Dispositif d'inertisation en présence d'un rayonnement UV dans des installations de passage ouvertes Active EP2786807B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14000487T PL2786807T3 (pl) 2013-04-05 2014-02-12 Urządzenie do inertyzacji za pomocą promieniowania UV w otwartych układach przepustowych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013005741.8A DE102013005741B3 (de) 2013-04-05 2013-04-05 Vorrichtung zur Inertisierung bei UV-Bestrahlung in offenen Durchlaufanlagen

Publications (2)

Publication Number Publication Date
EP2786807A1 EP2786807A1 (fr) 2014-10-08
EP2786807B1 true EP2786807B1 (fr) 2017-09-06

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EP (1) EP2786807B1 (fr)
DE (1) DE102013005741B3 (fr)
ES (1) ES2650472T3 (fr)
PL (1) PL2786807T3 (fr)

Cited By (1)

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WO2023222178A1 (fr) 2022-05-19 2023-11-23 IOT - Innovative Oberflächentechnologien GmbH Dispositif de rayonnement avec émetteurs à excimère en tant que source d'uv

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US10180248B2 (en) 2015-09-02 2019-01-15 ProPhotonix Limited LED lamp with sensing capabilities
DE102016102187B3 (de) 2016-02-09 2017-08-10 Heraeus Noblelight Gmbh Vorrichtung für die Behandlung eines Substrats mit UV-Strahlung und Verwendung der Vorrichtung
CN107685013A (zh) * 2017-03-29 2018-02-13 佛山市中山大学研究院 一种具有气体保护的uv固化装置
PL3415316T3 (pl) 2017-06-13 2020-10-05 Hymmen GmbH Maschinen- und Anlagenbau Sposób i urządzenie do wytwarzania strukturyzowanej powierzchni
IT201800010863A1 (it) * 2018-12-06 2020-06-06 Ind Chimica Adriatica S P A In Sigla Ica S P A Sistema meccanico di riflessione ed irraggiamento per la reticolazione di vernici polimerizzabili uv.
DE102019206431A1 (de) 2019-05-03 2020-11-05 Hymmen GmbH Maschinen- und Anlagenbau Verfahren zum Herstellen einer Struktur auf einer Oberfläche
CN113634464B (zh) * 2021-05-14 2024-05-24 邦弗特新材料股份有限公司 一种用于uv油漆固化的mec组合光源系统
JP2023025313A (ja) * 2021-08-10 2023-02-22 日本エア・リキード合同会社 紫外線硬化装置及び紫外線硬化方法

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Also Published As

Publication number Publication date
ES2650472T3 (es) 2018-01-18
PL2786807T3 (pl) 2018-03-30
EP2786807A1 (fr) 2014-10-08
DE102013005741B3 (de) 2014-05-22

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