EP1309410B1 - Device for applying a coating liquid on a metal sheet - Google Patents

Device for applying a coating liquid on a metal sheet Download PDF

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Publication number
EP1309410B1
EP1309410B1 EP01962493A EP01962493A EP1309410B1 EP 1309410 B1 EP1309410 B1 EP 1309410B1 EP 01962493 A EP01962493 A EP 01962493A EP 01962493 A EP01962493 A EP 01962493A EP 1309410 B1 EP1309410 B1 EP 1309410B1
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EP
European Patent Office
Prior art keywords
coating liquid
receptacle
liquid
cylinder
cleaning liquid
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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.)
Expired - Lifetime
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EP01962493A
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German (de)
French (fr)
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EP1309410A1 (en
Inventor
Jean Schrynemackers
Erwin Volon
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USINOR SA
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USINOR SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0813—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for supplying liquid or other fluent material to the roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/26—Spraying devices

Definitions

  • the chute is mounted on a support bar 21, which is arranged so as to be rotatable about its axis 22, with the aid of control means not shown.
  • the supply duct 30, provided with a valve 42, is a flexible duct that is connected to the outlet of a circulation pump 43.
  • valves, the circulation pump and the source of compressed air can be operated according to a automated program.
  • the opening and closing of the valves are automatically and their positions are represented on the figures and will therefore not be the subject of a more precise description.
  • the operator plunges the suction lance 52 and the discharge duct 34 in the used cleaning liquid tank 53.
  • This is the same circuit that was used for the supply of coating liquid that serves to purge this circuit and the introduction of the cleaning liquid.
  • the upper shell 37 and the lower shell 33 are now in the closed position, and, for example for 10 seconds, the cleaning liquid will wash the liquid supply circuit from coating.
  • the total time of such cleaning may be around 10 minutes and the total consumption of cleaning fluid of 20 liters, while currently we can consider a triple time and a quantity doubled of product. We must no longer consider operations manual, and often dangerous and unhealthy, cleaning by example of the sides of the cylinders.

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  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Spray Control Apparatus (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

The invention concerns a device for applying a coating liquid on a metal sheet comprising a lower shell (33) forming a recuperating container and an upper shell (34) mutually mobile between a closed position wherein they form a closed chamber containing feeding means, a collecting cylinder (3) and transfer means and an open position wherein they are spaced apart from each other, a container of cleaning liquid reserve (53), a container of coating liquid reserve (36), a compressed air source (47), first circulating means capable of supplying to the feeding means, in open position of the chamber, coating liquid from a coating liquid reserve container (36), second circulating means capable of supplying, in closed position of the chamber, a cleaning liquid from a cleaning liquid reserve container (53), and spraying means (39) capable of spraying cleaning liquid through at least one of the two shells to wash the elements contained in the chamber in closed position.

Description

La présente invention est relative à un dispositif d'application de liquide de revêtement sur une tôle, comprenant

  • un cylindre d'appui rotatif autour duquel défile en continu une tôle,
  • des moyens d'alimentation en liquide de revêtement,
  • un cylindre collecteur de film de liquide, rotatif, alimenté par les moyens d'alimentation, et
  • éventuellement des moyens de transfert du film de liquide du cylindre collecteur à la tôle défilant autour du cylindre d'appui.
The present invention relates to a coating liquid application device on a sheet, comprising
  • a rotating support cylinder around which a sheet continuously travels,
  • coating liquid supply means,
  • a rotating liquid film collecting cylinder fed by the supply means, and
  • optionally means for transferring the liquid film from the collecting cylinder to the sheet moving around the support cylinder.

On connaít depuis longtemps des dispositifs d'enduction de peinture liquide sur des tôles en défilement. Couramment, on utilise un bac, appelé encrier, à partir duquel un cylindre caoutchouté prélève de la peinture et puis la transfère sur un ou plusieurs cylindres successifs, le dernier étant un cylindre enducteur qui applique la peinture sur la bande métallique qui défile et qui repose elle-même sur un gros cylindre d'appui (v. par exemple US-A-4.046.931).We have known for a long time the coating devices of liquid paint on scrolling sheets. Commonly, we use a tray, called an inkwell, from which a rubberized cylinder takes from the paint and then transfers it to one or more successive cylinders, the last being a coating roll that applies the paint on the tape metal scrolling and resting itself on a large support cylinder (e.g., US-A-4,046,931).

Le nettoyage de ces dispositifs d'application de liquide de revêtement est nécessaire régulièrement. Le document US-A-3227078 montre un dispositif de nettoyage selon le préambule de la revendication 1. Il est très complexe, demande beaucoup de temps et la consommation en produit de lavage est très importante. De plus, ce nettoyage est à l'heure actuelle généralement effectué manuellement et il présente l'inconvénient d'être une opération risquée pour la main-d'oeuvre, étant donné la toxicité des émanations gazeuses et leur danger d'inflammation. Cleaning these liquid application devices from coating is needed regularly. US-A-3227078 shows a cleaning device according to the preamble of claim 1. It is very complex, asks a lot of time and the consumption of washing product is very important. Moreover, this cleaning is currently generally performed manually and has the disadvantage of being an operation risky for manpower, given the toxicity of the fumes gases and their danger of ignition.

La présente invention a pour but de résoudre ces problèmes et de mettre au point un dispositif permettant de surmonter les inconvénients précités.The present invention aims to solve these problems and to develop a mechanism to overcome aforementioned drawbacks.

Avantageusement, le dispositif doit pouvoir être nettoyé de manière rapide et efficace.Advantageously, the device must be able to be cleaned of fast and efficient way.

On résout ces problèmes par un dispositif tel que décrit au début, ce dispositif comprenant en outre un appareil de lavage comportant

  • une coquille inférieure formant un récipient de récupération et une coquille supérieure mutuellement déplaçables entre une position fermée dans laquelle elles forment une enceinte fermée renfermant les moyens d'alimentation, le cylindre collecteur et les moyens de transfert et une position ouverte dans laquelle elles sont écartées l'une de l'autre,
  • un récipient de réserve de liquide de nettoyage,
  • un récipient de réserve de liquide de revêtement,
  • une source d'air comprimé,
  • des premiers moyens de circulation qui sont capables de fournir aux moyens d'alimentation, en position ouverte de l'enceinte, du liquide de revêtement à partir du récipient de réserve de liquide de revêtement,
  • des seconds moyens de circulation qui sont capables de fournir aux moyens d'alimentation, en position fermée de l'enceinte, du liquide de nettoyage à partir du récipient de réserve de liquide de nettoyage,
  • des moyens de projection qui sont capables de projeter du liquide de nettoyage à travers au moins une des deux coquilles pour laver les éléments renfermés par l'enceinte en position fermée, et
  • éventuellement des moyens d'injection de gaz comprimé au travers d'au moins une des deux coquilles pour sécher les éléments renfermés par l'enceinte en position fermée.
These problems are solved by a device as described at the beginning, this device further comprising a washing apparatus comprising
  • a lower shell forming a collection container and an upper shell mutually displaceable between a closed position in which they form a closed enclosure enclosing the supply means, the collecting cylinder and the transfer means and an open position in which they are spaced apart; one of the other,
  • a cleaning liquid reserve container,
  • a coating liquid reserve container,
  • a source of compressed air,
  • first circulating means which are capable of supplying the supply means, in the open position of the enclosure, with the coating liquid from the coating liquid reserve container,
  • second circulation means which are capable of supplying the cleaning means, in the closed position of the enclosure, with cleaning liquid from the cleaning liquid reserve container,
  • projection means which are capable of projecting cleaning liquid through at least one of the two shells to wash the elements enclosed by the enclosure in the closed position, and
  • optionally means for injecting compressed gas through at least one of the two shells to dry the elements enclosed by the enclosure in the closed position.

Le déplacement et le fonctionnement de certains ou de tous ces moyens peuvent être réalisés manuellement ou de manière automatisée.The movement and operation of some or all these means can be done manually or automated.

Cet appareillage permet une réduction du temps de nettoyage, une diminution de la consommation de liquide de nettoyage, qui est généralement un solvant pour le liquide de revêtement, et une sécurité et hygiène fortement améliorées puisque les vapeurs dégagées par le solvant sont confinées dans une enceinte fermée, à partir de laquelle elles peuvent être aspirées d'une manière courante.This apparatus allows a reduction of the time of cleaning, a decrease in cleaning fluid consumption, which is usually a solvent for the coating liquid, and a safety and hygiene greatly improved since the vapors released by the solvent are confined in a closed chamber, starting from which they can be sucked up in a common way.

Suivant une forme particulière de réalisation de l'invention, l'appareil de lavage comprend comme premiers et seconds moyens de circulation, une pompe de circulation et un circuit comprenant un conduit d'amenée pour introduire soit du liquide de revêtement, soit du liquide de nettoyage dans les moyens d'alimentation et un conduit de sortie pour évacuer soit du liquide de revêtement, soit du liquide de nettoyage, du récipient de récupération. Avantageusement, cet exemple de dispositif comprend donc un seul circuit à la fois pour l'alimentation en liquide de revêtement et pour le nettoyage des moyens d'alimentation.According to a particular embodiment of the invention, the washing apparatus comprises as first and second means for circulation, a circulation pump and a circuit comprising a conduit feed for introducing either coating liquid or liquid cleaning in the feeding means and an outlet duct for evacuate either coating liquid or cleaning liquid, recovery container. Advantageously, this example of a device therefore includes only one circuit at a time for the liquid supply of coating and for cleaning the feeding means.

Suivant une forme avantageuse de réalisation de l'invention, les moyens de projection de liquide servent simultanément de moyens d'injection de gaz. Ce dispositif présente un agencement particulièrement simple et aisé à manipuler.According to an advantageous embodiment of the invention, the liquid projection means serve simultaneously to gas injection means. This device has an arrangement particularly simple and easy to handle.

D'autres formes de réalisation de dispositif suivant l'invention sont indiquées dans les revendications annexées.Other embodiments of the following device the invention are indicated in the appended claims.

D'autres détails et particularités de l'invention ressortiront de la description donnée ci-après à titre non limitatif et avec référence aux dessins annexés.

  • Les figures 1 et 2 représentent d'une manière schématique des variantes de réalisation de dispositifs d'application de liquide de revêtement sur une tôle.
  • La figure 3 représente un détail de la figure 1.
  • Les figures 4 à 9 représentent une forme de réalisation du dispositif suivant l'invention avec appareil de nettoyage, à différents stades successifs de son utilisation.
    • Other details and particularities of the invention will emerge from the description given below without limitation and with reference to the accompanying drawings.
  • Figures 1 and 2 show schematically alternative embodiments of coating liquid application devices on a sheet.
  • Figure 3 shows a detail of Figure 1.
  • Figures 4 to 9 show an embodiment of the device according to the invention with cleaning apparatus, at different successive stages of its use.

    • Sur la figure 1 on a représenté une variante de réalisation de dispositif suivant l'invention très simple, qui comprend un cylindre d'appui rotatif 1 autour duquel défile en continu une tôle ou bande métallique 2. La bande 2 pressée passe dans l'entrefer ajustable, existant entre le cylindre d'appui 1 et un cylindre appelé collecteur 3, dont la surface périphérique est avantageusement en une matière caoutchouteuse. Le cylindre collecteur 3 tourne en sens inverse du cylindre d'appui 1. Un récipient d'alimentation 4 contenant du liquide de revêtement à appliquer sur la bande 2 est monté en face du cylindre collecteur 3, de manière à s'étendre le long de celui-ci.FIG. 1 shows a variant embodiment device according to the invention very simple, which comprises a cylinder rotary support 1 around which a sheet or band continuously moves 2. The pressed belt 2 passes into the adjustable gap, existing between the support cylinder 1 and a cylinder called manifold 3, whose peripheral surface is advantageously made of a material rubbery. The collecting cylinder 3 rotates in the opposite direction of the support cylinder 1. A feed container 4 containing liquid from coating to be applied on the strip 2 is mounted in front of the cylinder manifold 3, so as to extend along it.

    Ce récipient d'alimentation 4 est représenté de manière plus détaillée sur la figure 3, où, dans l'exemple illustré, il se présente sous la forme d'une goulotte d'alimentation de forme approximativement prismatique. La goulotte 4 est ouverte vers le haut et comprend une paroi avant 5 qui est de préférence parallèle à l'axe 6 du cylindre collecteur 3 et qui s'étend approximativement verticalement. La goulotte comprend en outre une paroi de fond 7 qui s'étend en oblique vers le haut, depuis le bas de la paroi avant 5, tout en formant à l'angle inférieur de la goulotte ainsi formé, une ouverture de sortie 8 pour le liquide contenu dans la goulotte 4.This feed container 4 is represented so more detailed in Figure 3, where in the illustrated example, it is presented in the form of a feed chute of approximately prismatic. The chute 4 is open upwards and comprises a front wall 5 which is preferably parallel to the axis 6 of the cylinder manifold 3 and which extends approximately vertically. The chute further comprises a bottom wall 7 which extends obliquely towards the top, from the bottom of the front wall 5, while forming at the lower corner of the chute thus formed, an outlet opening 8 for the liquid contained in the chute 4.

    Une racle flexible 9 est, dans l'exemple illustré, agencée de manière réglable sur la paroi de fond 7 de manière à pouvoir s'étendre plus ou moins loin en direction de la surface périphérique du cylindre collecteur 3. Pour ce faire, dans l'exemple illustré, la racle flexible 9 est composée de plusieurs lames superposées et présentant chacune une ouverture allongée qui permet de les fixer de manière ajustable sur la paroi de fond 7. A cet effet, on a prévu dans cet exemple des boulons 14, des écrous à papillon 15 et des plaquettes également munies d'un trou allongé. On peut de cette manière faire varier la distance entre les lames de la racle et le cylindre collecteur ce qui aura pour effet de faire fléchir plus ou moins fortement ces lames et donc de faire varier la pression appliquée par la racle et la quantité de peinture qui peut passer sur la surface périphérique du cylindre 3.A flexible squeegee 9 is, in the illustrated example, arranged adjustable way on the bottom wall 7 so as to be able to extend more or less far towards the peripheral surface of the cylinder 3. To do this, in the example illustrated, the flexible squeegee 9 is composed of several superimposed blades and each having a elongated opening which allows them to be fixed in an adjustable manner on the 7. For this purpose, bolts are provided in this example. 14, butterfly nuts 15 and pads also provided with a elongated hole. In this way it is possible to vary the distance between blades of the squeegee and the collector cylinder which will have the effect of making to flex more or less strongly these blades and thus to vary the pressure applied by the squeegee and the amount of paint that can pass on the peripheral surface of the cylinder 3.

    La goulotte d'alimentation 4 illustrée comprend aussi deux parois latérales 18 et une paroi arrière 20.The feed chute 4 illustrated also includes two side walls 18 and a rear wall 20.

    La goulotte est montée sur une barre de support 21, qui est agencée de manière à pouvoir tourner autour de son axe 22, à l'aide de moyens de commande non représentés. On peut ainsi régler l'ouverture de sortie 8 en faisant varier l'inclinaison de la goulotte par une rotation de celle-ci autour de l'axe 22. Cela permet de diminuer ou d'augmenter la pression de la racle sur le cylindre collecteur 3 en fonction du débit demandé.The chute is mounted on a support bar 21, which is arranged so as to be rotatable about its axis 22, with the aid of control means not shown. We can thus adjust the opening 8 by varying the inclination of the chute by a rotation of the latter around the axis 22. This makes it possible to reduce or increase the squeegee pressure on the collector cylinder 3 depending on the flow rate request.

    Tous ces moyens permettent donc d'appliquer le liquide de revêtement sur le cylindre collecteur avec une pression parfaitement déterminée en fonction des besoins, ce qui permet d'éviter le problème de démouillage et de réduire la quantité de liquide nécessaire.All these means therefore make it possible to apply the liquid of coating on the collector cylinder with a perfectly pressure determined according to need, which avoids the problem dewetting and reduce the amount of liquid needed.

    Dans les coins inférieurs latéraux de la goulotte 4 représentée, on peut prévoir deux trop-pleins, dont seul un est représenté et porte la référence 23. Ces trop-pleins permettent d'évacuer par des conduits d'évacuation tout liquide débordant dans les trop-pleins. Ceux-ci maintiennent ainsi constant le niveau de liquide à l'intérieur d'un récipient d'alimentation. Des déflecteurs 28 disposés sur la paroi de fond 7 distribuent de manière uniforme le liquide de revêtement alimenté par un conduit d'alimentation 30 dans la partie haute de la goulotte 4.In the lower side corners of chute 4 shown, two overflows can be foreseen, of which only one is represented and bears the reference 23. These overflows make it possible to evacuate flue pipes with all the liquid spilling into the overflows. These thus keep the fluid level constant inside a supply container. Deflectors 28 arranged on the bottom wall 7 uniformly distribute the coating liquid fed by a supply duct 30 in the upper part of the chute 4.

    De cette manière, le liquide de revêtement est toujours en circulation dans la goulotte, du haut vers le bas, de manière uniforme, à une vitesse réglée précisément sur la quantité de liquide devant passer par la racle flexible. Cela permet de diminuer d'environ quatre fois la quantité de liquide qui est normalement nécessaire lors de l'emploi d'un encrier, tout en évitant tous les inconvénients liés aux impuretés qui y circulent. Le dispositif est ainsi alimenté en continu par un liquide de préférence filtré et maintenu à bonne température et viscosité.In this way, the coating liquid is always in circulation in the chute, from top to bottom, in a uniform manner, a speed precisely regulated on the quantity of liquid to pass by the flexible squeegee. This reduces by about four times the amount of fluid that is normally required when using a inkwell, while avoiding all the inconveniences associated with impurities circulating. The device is thus fed continuously with a liquid of preferably filtered and maintained at good temperature and viscosity.

    Ainsi qu'il ressort de la figure 2, on peut aussi prévoir que le cylindre collecteur transfère le liquide de revêtement à la bande 2 par l'intermédiaire d'un ou de plusieurs cylindres intercalaires 31 et 32.As can be seen in FIG. collector cylinder transfers the coating liquid to the strip 2 by via one or more intermediate cylinders 31 and 32.

    D'autres moyens d'alimentation que ceux prévus sur les figures 1 et 3 peuvent aussi être envisagés par l'homme de métier. Sur l'exemple de réalisation illustré sur la figure 2, on a représenté un encrier classique 27. En traits interrompus on a aussi prévu une forme de réalisation avec cylindre supplémentaire 29 en appui sur le cylindre collecteur 3, le liquide de revêtement étant alimenté dans l'entrefer entre ces deux cylindres pour former un ménisque à partir duquel le liquide est entraíné par gravité par le cylindre collecteur 3.Other means of supply than those provided for in Figures 1 and 3 may also be considered by those skilled in the art. Sure the embodiment shown in Figure 2, there is shown an inkwell 27. In dashed lines, a form of realization with additional cylinder 29 resting on the cylinder manifold 3, the coating liquid being fed into the gap between these two cylinders to form a meniscus from which the liquid is driven by gravity by the collecting cylinder 3.

    Ainsi qu'il ressort des figures 4 à 9 le dispositif suivant l'invention comprend en outre un appareil de lavage. Celui-ci comporte un récipient de récupération 33 qui, dans l'exemple illustré, a la forme d'une coquille. Cette coquille 33 peut par exemple récupérer tout excès de liquide de revêtement débordant latéralement du cylindre collecteur, de la rade flexible, ou des cylindres intercalaires. Un conduit de décharge 34, pourvu d'une vanne 35, permet d'évacuer le liquide contenu dans le récipient 33 dans un réservoir à liquide de revêtement 36, ce qui permet le recyclage de celui-ci (v. figures 4 et 9) ou dans un réservoir à liquide de nettoyage usagé 53 (v. figures 5 à 8).As is apparent from FIGS. 4 to 9, the following device the invention further comprises a washing apparatus. This one involves a recovery container 33 which, in the illustrated example, has the form of a shell. This shell 33 can for example recover any excess coating liquid projecting laterally from the collecting cylinder, of the flexible harbor, or intercalated cylinders. A conduit of discharge 34, provided with a valve 35, makes it possible to evacuate the liquid contained in the container 33 in a liquid coating tank 36, which allows the recycling thereof (see Figures 4 and 9) or in a used cleaning fluid reservoir 53 (see Figures 5 to 8).

    Le dispositif illustré sur les figures 4 à 9 comprend un appareil de nettoyage comprenant en plus de la coquille inférieure 33 décrite ci-dessus une coquille supérieure 37. La coquille supérieure est munie de préférence d'un conduit de dégagement 38 pour les vapeurs et gaz et des tuyères de pulvérisation 39 qui peuvent être reliées à un conduit flexible d'alimentation 40 pourvu de préférence d'une vanne 41.The device illustrated in FIGS. 4 to 9 comprises a cleaning apparatus comprising in addition to the lower shell 33 described above an upper shell 37. The upper shell is preferably provided with a clearance duct 38 for the vapors and gas and spray nozzles 39 which can be connected to a flexible supply duct 40 preferably provided with a valve 41.

    Les coquilles sont mutuellement déplaçables d'une manière connue, non représentée, et peuvent donc former en position rapprochée une enceinte fermée comme représenté par exemple sur la figure 5.The shells are mutually displaceable in a manner known, not shown, and can therefore form in close position a closed enclosure as represented for example in FIG.

    Le conduit d'alimentation 30, pourvu d'une vanne 42, est un conduit flexible qui est connecté à la sortie d'une pompe de circulation 43.The supply duct 30, provided with a valve 42, is a flexible duct that is connected to the outlet of a circulation pump 43.

    La sortie de cette pompe 43 est également en communication avec le conduit flexible d'alimentation 40, par un tuyau 44, muni à chacune de ses deux extrémités d'une vanne 45 et 46.The output of this pump 43 is also in communicating with the flexible supply duct 40 via a pipe 44, provided at each of its two ends with a valve 45 and 46.

    Un compresseur à air 47 est relié également au conduit d'alimentation flexible 40 par un tuyau 48 muni d'une vanne 49.An air compressor 47 is also connected to the duct flexible supply 40 by a pipe 48 provided with a valve 49.

    L'entrée de la pompe de circulation 43 est reliée à un conduit d'amenée flexible 50, muni d'une vanne 51 ainsi que d'une lance d'aspiration 52. Cette lance 52 peut d'une manière sélective être plongée dans le réservoir à liquide de revêtement 36 (v. figure 9) ou dans le réservoir à liquide de nettoyage usagé 53 (v. figure 5) ou ne pas être plongée dans un quelconque réservoir (v. figures 4 et 6 à 8).The inlet of the circulation pump 43 is connected to a flexible supply duct 50, provided with a valve 51 and a lance suction 52. This lance 52 can selectively be dipped in the coating liquid reservoir 36 (see Figure 9) or in the used cleaning fluid reservoir 53 (see Figure 5) or not immersed in any reservoir (see Figures 4 and 6 to 8).

    L'entrée de la pompe de circulation 43 est aussi pourvue de deux tuyaux 54 et 55, pourvus chacun d'une vanne 56 et 57, l'un étant immergé dans le réservoir à liquide de nettoyage usagé 53 et l'autre dans un réservoir à liquide de nettoyage frais 58. The inlet of the circulation pump 43 is also provided with two pipes 54 and 55, each provided with a valve 56 and 57, one being immersed in the used cleaning fluid reservoir 53 and the other in a fresh cleaning liquid tank 58.

    Dans le réservoir 53, une sortie peut être prévue en 59 vers un réservoir de liquide de nettoyage à régénérer 60.In the tank 53, an output can be provided in 59 to a reservoir of cleaning liquid to be regenerated 60.

    Dans l'exemple illustré, les vannes, la pompe de circulation et la source d'air comprimé peuvent être mis en fonctionnement selon un programme automatisé. L'ouverture et la fermeture des vannes sont commandées automatiquement et leurs positions sont représentées sur les figures et ne feront donc pas l'objet d'une description plus précise.In the illustrated example, the valves, the circulation pump and the source of compressed air can be operated according to a automated program. The opening and closing of the valves are automatically and their positions are represented on the figures and will therefore not be the subject of a more precise description.

    Après une étape de revêtement, il peut être nécessaire de nettoyer le dispositif. Après écartement entre le cylindre d'appui 1 et les autres cylindres d'une manière connue, l'opérateur commence par purger le circuit d'alimentation de liquide de revêtement, comme illustré sur la figure 4. De l'air est aspiré dans la lance d'aspiration 52, auparavant sortie du réservoir 36. Il passe par le conduit 50, la pompe de circulation 43 et la conduit d'alimentation 30. II purge ainsi ce circuit d'alimentation en liquide de revêtement et le liquide purgé est récupéré dans la coquille inférieure 33, puis recyclé dans le réservoir 36.After a coating step, it may be necessary to clean the device. After separation between the support cylinder 1 and the other cylinders in a known manner, the operator begins with purging the coating liquid supply circuit, as illustrated on the figure 4. Air is sucked into the suction lance 52, previously outlet of the tank 36. It passes through the conduit 50, the circulation pump 43 and the supply duct 30. It thus purges this supply circuit in coating liquid and the purged liquid is recovered in the shell lower 33, then recycled to the reservoir 36.

    Comme représenté sur la figure 5, l'opérateur plonge la lance d'aspiration 52 ainsi que le conduit de décharge 34 dans le réservoir à liquide de nettoyage usagé 53. C'est donc le même circuit qui a servi à l'alimentation en liquide de revêtement qui sert à la purge de ce circuit et à l'introduction du liquide de nettoyage.As shown in FIG. 5, the operator plunges the suction lance 52 and the discharge duct 34 in the used cleaning liquid tank 53. This is the same circuit that was used for the supply of coating liquid that serves to purge this circuit and the introduction of the cleaning liquid.

    La coquille supérieure 37 et la coquille inférieure 33 sont maintenant en position fermée, et, pendant par exemple 10 secondes, le liquide de nettoyage va laver le circuit d'alimentation en liquide de revêtement.The upper shell 37 and the lower shell 33 are now in the closed position, and, for example for 10 seconds, the cleaning liquid will wash the liquid supply circuit from coating.

    Ainsi qu'il est illustré sur la figure 6, la lance d'aspiration 52 est à nouveau sortie du réservoir 53. Par le tuyau 55, du liquide de nettoyage est projeté pendant environ 2 minutes vers l'intérieur de l'enceinte formée par les coquilles, par l'intermédiaire des tuyères 39. Le liquide lave ainsi l'ensemble du dispositif et le liquide de nettoyage usagé revient au réservoir 53.As illustrated in FIG. 6, the suction lance 52 is again out of the tank 53. By the pipe 55, liquid of cleaning is projected for about 2 minutes inwards from the enclosure formed by the shells, via the nozzles 39. liquid thus washes the entire device and the used cleaning fluid returns to tank 53.

    Pendant une éventuelle séquence ultérieure de par exemple 15 secondes, illustrée sur la figure 7, on ferme la vanne 57 et on ouvre la vanne 56, ce qui permet d'aspirer du liquide de nettoyage frais à partir de la cuve 58 et de rincer ainsi l'installation.During a possible subsequent sequence of example 15 seconds, illustrated in Figure 7, the valve 57 is closed and the valve 56 is opened, which makes it possible to suck cleaning liquid fresh from the tank 58 and thus rinse the installation.

    Dans la séquence éventuelle ultérieure représentée sur la figure 8 et qui peut durer environ 2 minutes, toutes les entrées et sorties de la pompe de circulation 43 sont obturées. De l'air comprimé est alors injecté par les mêmes tuyères 39, à l'intérieur de l'enceinte, pour purger l'installation et la sécher. On peut prévoir, raccordé au conduit de dégagement 38 un système d'aspiration non représenté.In the subsequent eventual sequence represented on the figure 8 and which can last about 2 minutes, all inputs and outputs of the circulation pump 43 are closed. Compressed air is then injected by the same nozzles 39, inside the enclosure, to purge the installation and dry it. It can be provided, connected to the conduit of clearance 38 a suction system not shown.

    Après séchage, les coquilles 33 et 37 sont écartées l'une de l'autre comme représenté sur la figure 9, la lance d'aspiration 52 est à nouveau immergée dans le réservoir à liquide de revêtement 36 ainsi que le conduit de décharge 34 et le circuit d'alimentation est à nouveau ouvert. Le dispositif est alors prêt pour une nouvelle commande d'application.After drying, the shells 33 and 37 are separated one on the other, as shown in FIG. 9, the suction lance 52 is again immersed in the coating liquid reservoir 36 as well that the discharge duct 34 and the supply circuit is again open. The device is then ready for a new order application.

    Le temps total d'un tel nettoyage peut être d'environ 10 minutes et la consommation totale en liquide de nettoyage de 20 litres, alors qu'actuellement on peut envisager un triple de temps et une quantité doublée de produit. On ne doit plus envisager d'opérations manuelles, et souvent dangereuses et insalubres, de nettoyage par exemple des flancs des cylindres.The total time of such cleaning may be around 10 minutes and the total consumption of cleaning fluid of 20 liters, while currently we can consider a triple time and a quantity doubled of product. We must no longer consider operations manual, and often dangerous and unhealthy, cleaning by example of the sides of the cylinders.

    Il doit être entendu que la présente invention n'est en aucune façon limitée aux formes de réalisation décrites ci-dessus et que bien des modifications peuvent y être apportées sans sortir du cadre des revendications annexées.It should be understood that the present invention is not in no way limited to the embodiments described above and that many changes can be made without departing from appended claims.

    Claims (12)

    1. Device for applying coating liquid to a metal sheet, 5 comprising
      a rotary support cylinder (1) around which a metal sheet (2) passes continuously,
      means of supplying coating liquid,
      a rotary cylinder (3) collecting a liquid film, supplied by the supply means, and
      means of transferring the liquid film from the collecting cylinder (3) to the metal sheet (2) passing around the support cylinder (1),
         characterised in that it also comprises a washing apparatus comprising
      a bottom shell (33) forming a recovery receptacle and a top shell (34), both mutually movable between a closed position in which they form a closed chamber enclosing the supply means, the collecting cylinder (3) and the transfer means, and an open position in which they are separated from each other.
      a receptacle (53) for a cleaning liquid reserve,
      a receptacle (36) for a coating liquid reserve,
      a compressed air source (47),
      first circulation means which are capable of supplying, to the supply means, in the open position of the chamber, coating liquid from the receptacle (36) for the coating liquid reserve,
      second circulation means which are capable of supplying, to the supply means, in the closed position of the chamber, cleaning liquid from the receptacle (53) for the cleaning liquid reserve,
      spray means (39) which are capable of spraying cleaning liquid through at least one of the two shells in order to wash the elements enclosed in the chamber in the closed position, and
      possibly means (39) of injecting compressed gas through at least one of the two shells in order to dry the elements enclosed by the chamber in the closed position.
    2. Device according to Claim 1, characterised in that the washing apparatus comprises, as first and second circulation means, a circulation pump (43) and a circuit comprising a feed conduit (30) for introducing either coating liquid or cleaning liquid in the supply means (4) and a discharge conduit (34) for discharging either coating liquid or cleaning liquid, from the recovery receptacle (33).
    3. Device according to one or other of Claims 1 and 2, characterised in that the liquid spraying means serve simultaneously as gas injection means.
    4. Device according to Claim 3, characterised in that the spraying means serving simultaneously as injection means are connected to the aforementioned circulation pump (43) in order to make cleaning liquid circulate and to a compressed air source (47) in order to inject compressed air.
    5. Device according to any one of Claims 1 to 4, characterised in that the washing apparatus also comprises purge means which are capable of making a purge gas pass through the supply means.
    6. Device according to Claim 5, characterised in that the purge means supply the circulation pump and the said circuit with the said purge gas.
    7. Device according to any one of Claims 1 to 6, characterised in that, in the washing apparatus, the bottom shell (33) is arranged so as to be able to be connected alternately to the receptacle (36) for the coating liquid reserve and to the receptacle (53) for the cleaning liquid reserve, so as to allow recycling of these.
    8. Device according to any one of Claims 1 to 7, characterised in that the supply means comprise a supply receptacle (4) containing the said liquid and having a liquid discharge opening (8) extending along the collecting cylinder (3) in a bottom part of the said receptacle (4), and a flexible scraper (9) arranged on the supply receptacle (4) so as to limit the discharge opening (8) downwards, and to be pressed against the collecting cylinder (3) in order to apply the liquid film thereto.
    9. Device according to any one of Claims 1 to 7, characterised in that the supply means comprise an ink duct in which the collecting cylinder is partially immersed.
    10. Device according to any one of Claims 1 to 9, characterised in that the collecting cylinder (3) has a peripheral surface applied to the metal sheet (2) passing around the support cylinder (1).
    11. Device according to any one of Claims 1 to 9, characterised in that it comprises, as transfer means, at least one rotary cylinder (31, 32) between the collecting cylinder (3) and the metal sheet (2) which passes around the support cylinder (1).
    12. Device according to one of Claims 10 and 11, characterised in that the supply means comprise an additional rotary cylinder pressed against the collecting cylinder, forming between them an air gap in which the coating liquid supplied is received.
    EP01962493A 2000-08-17 2001-08-17 Device for applying a coating liquid on a metal sheet Expired - Lifetime EP1309410B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    BE2000/0514A BE1013647A3 (en) 2000-08-17 2000-08-17 Device coating application of liquid on a plate.
    BE200000514 2000-08-17
    PCT/BE2001/000138 WO2002013976A1 (en) 2000-08-17 2001-08-17 Device for applying a coating liquid on a metal sheet

    Publications (2)

    Publication Number Publication Date
    EP1309410A1 EP1309410A1 (en) 2003-05-14
    EP1309410B1 true EP1309410B1 (en) 2005-05-04

    Family

    ID=3896632

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01962493A Expired - Lifetime EP1309410B1 (en) 2000-08-17 2001-08-17 Device for applying a coating liquid on a metal sheet

    Country Status (9)

    Country Link
    EP (1) EP1309410B1 (en)
    AT (1) ATE294645T1 (en)
    AU (1) AU2001283721A1 (en)
    BE (1) BE1013647A3 (en)
    DE (1) DE60110607T2 (en)
    DK (1) DK1309410T3 (en)
    ES (1) ES2240498T3 (en)
    PT (1) PT1309410E (en)
    WO (1) WO2002013976A1 (en)

    Family Cites Families (12)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2273021A (en) * 1940-02-28 1942-02-17 American Can Co Adhesive applying machine
    US3227078A (en) * 1962-11-23 1966-01-04 Johnson Fast Print Mach Corp Structure and operation of color boxes of printing apparatus
    US3608515A (en) * 1968-12-04 1971-09-28 Philip E Tobias Applicator for applying pressure sensitive adhesive and other coating materials to sheet items
    GB1492962A (en) 1974-02-19 1977-11-23 Alcan Res & Dev Method and apparatus for applying coating compositions to strip material
    JPS5814970A (en) 1981-07-17 1983-01-28 Nisshin Steel Co Ltd Continuous paint application on metal strip material
    DE3725116A1 (en) 1987-07-29 1989-02-09 Roland Man Druckmasch Device for applying liquids, in particular painting apparatus
    DE4224726A1 (en) 1992-07-27 1994-02-03 Voith Gmbh J M Coating device with application gap formed between an application roller and a counter roller
    US5628827A (en) * 1992-09-25 1997-05-13 Minnesota Mining And Manufacturing Company Non-recirculating, die supplied doctored roll coater with solvent addition
    DE19508745A1 (en) * 1995-03-10 1996-09-12 Josef Dr Hefele Process for grid-like coating of fabrics with hot melt adhesives using the gravure printing process
    DE29609426U1 (en) * 1996-05-28 1996-08-14 Heidelberger Druckmaschinen Ag, 69115 Heidelberg Washing device for inking units of printing machines
    DE19845367C2 (en) * 1998-10-02 2002-12-19 Gsb Wahl Gmbh Method and device for cleaning parts of printing machines
    JP2000117954A (en) * 1998-10-16 2000-04-25 Tani Denki Kogyo Kk Method and apparatus for cleaning screen printing plate, and the screen printing plate

    Also Published As

    Publication number Publication date
    WO2002013976A1 (en) 2002-02-21
    DK1309410T3 (en) 2005-08-08
    EP1309410A1 (en) 2003-05-14
    ATE294645T1 (en) 2005-05-15
    ES2240498T3 (en) 2005-10-16
    AU2001283721A1 (en) 2002-02-25
    BE1013647A3 (en) 2002-05-07
    DE60110607T2 (en) 2005-12-22
    DE60110607D1 (en) 2005-06-09
    PT1309410E (en) 2005-09-30

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