EP0038729B1 - Apparatus for applying a coating layer to a continuously travelling web - Google Patents

Apparatus for applying a coating layer to a continuously travelling web Download PDF

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Publication number
EP0038729B1
EP0038729B1 EP81400510A EP81400510A EP0038729B1 EP 0038729 B1 EP0038729 B1 EP 0038729B1 EP 81400510 A EP81400510 A EP 81400510A EP 81400510 A EP81400510 A EP 81400510A EP 0038729 B1 EP0038729 B1 EP 0038729B1
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EP
European Patent Office
Prior art keywords
roller
take
product
strip
rollers
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Expired
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EP81400510A
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German (de)
French (fr)
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EP0038729A1 (en
Inventor
Jacques Pierre Fara
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D C M
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D C M
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Priority to AT81400510T priority Critical patent/ATE8112T1/en
Publication of EP0038729A1 publication Critical patent/EP0038729A1/en
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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
    • B05C1/086—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 a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith
    • B05C1/0865—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 a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith the cooperating element being a roller, e.g. a coating 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

Definitions

  • the present invention relates to a device for continuously applying a coating layer on a strip of material circulating between two rotary cylinders bearing against one another, having a speed of rotation equal to the speed of movement of the strip and one of which is the applicator cylinder of the coating layer, of the type comprising a reserve containing a coating product, a first roller for continuously withdrawing from the reserve a metered quantity of product, means for drive the pick-up roller at a preset constant speed of rotation, and means for transferring the product picked up by the pick-up roller onto the applicator cylinder.
  • US-A-3 647 525 illustrates the prior art since it describes a device making it possible to apply a liquid or slightly viscous product to a moving strip, but which cannot be used satisfactorily for making coatings of thin with a very viscous product.
  • the present invention proposes to memorize this gap and, to do this, it relates to a coating device of the aforementioned type, which is characterized in that the transfer means comprise a second roller situated between the pick-up roller. and the applicator cylinder, which extends parallel to them but bears only against the applicator cylinder, and a third roller pressing against the pick-up roller and the second roller, the third roller being mounted idly while the second roller is rotated by means rotating it in the same direction as the pick roller.
  • the first roller continuously draws from the reserve a constant quantity of product which it directs towards the third roller.
  • the latter then carries with it the product which it receives from the first roller and directs it to the second roller.
  • the second roller drives the product it receives from the third roller and directs it towards the cylinder which applies it against one of the faces of the moving strip.
  • the layer of product deposited by the third roller on the second will be thinner as the latter will rotate faster than the first roller.
  • the speed of the first roller it is therefore possible to give the thickness of the layer of product transferred to the second roller, and therefore to the strip, a constant value which may be very low.
  • the coating device further comprises means for adjusting the pressure of the third roller on the first and second rollers.
  • This other arrangement makes it possible to act even more precisely on the thickness and the regularity of the layer of coating product deposited on the strip.
  • By properly adjusting the intensity of the pressure with which the third roller rests on the first and second rollers it is indeed possible to modify the amount of product that can be transferred from the first to the second roller and therefore to control with greater high accuracy the thickness and regularity of the layer deposited on the strip.
  • the third roller is carried at each of its ends by bearings supported by levers articulated on the axis of the first roller, each bearing being movable radially relative to the first roller under the action of a first pneumatic cylinder, while each lever is able to pivot around the axis of the first roller under the action of a second pneumatic cylinder.
  • the pneumatic cylinders make it possible to precisely measure the pressure exerted by the third roller on the other two.
  • At least one of the rollers it is also advantageous for at least one of the rollers to contain heating means. Indeed, when the coating product is highly viscous, it is thus possible to lower its viscosity so that its application on the strip can be carried out under the best conditions. Tests have shown that it is desirable to reduce the viscosity of the product around 2500 centipoises or 2.5 poiseuille (m- 1 - kg. S- ⁇ .
  • the third roller has a length equal to the width of the strip and is shorter than the other two rollers, the length of which corresponds to that of the cylinders for the passage of the material to be coated.
  • the coating product is thus applied to the second roller only over a length equal to the width of the strip. It follows that the maintenance or cleaning operations of the second roller and of the cylinder which bears against it thus become easier.
  • the reserve of product extends between the first roller and a roller immobilized in rotation and applied against the latter by adjustable clamping means.
  • adjustable clamping means By properly adjusting the clamping pressure exerted between the fixed roller and the first roller, it is of course possible to control the flow rate of the coating product withdrawn from the reserve.
  • the coating device which can be seen in the drawing makes it possible to apply a layer of product, for example an adhesive without solvent, on a strip of material 1 circulating at constant speed between two cylinders 2 and 3 resting on the 'one against the other and whose speed of rotation is equal to the speed of travel of the strip.
  • the strip 1 the tension of which is adjusted in a manner known per se, passes over a drive cylinder 4 located upstream of the cylinder 2 and between two driving cylinders 5 and 6 located downstream of the cylinder 2 and at which a another strip of material 7 is applied against the coated face of the strip 1.
  • the coating device comprises a reserve 8 containing the coating product, a first roller 9 associated with the reserve 8 for continuously withdrawing a metered amount of product therefrom, a second roller 10 pressing against the cylinder 3 and spaced from the cylinder 9, and a third roller 11 mounted idly, resting on the rollers 9 and 10.
  • a DC motor M i which is connected to a source not shown by means of a current controller V and a potentiometer P, is provided to drive the roller 9 with a preset constant speed of rotation.
  • a second direct current motor M 2 supplied by means of the variator V, makes it possible to drive the roller 10 with a constant rotational speed equal to the running speed of the strip 1.
  • the idler roller 11 is carried at each of its ends by bearings 12 mounted on levers 13 articulated on the axis of the roller 9.
  • Each bearing 12 is connected to the rod 14 of a pneumatic cylinder 15 carried by the corresponding lever 13 and can therefore move radially relative to the roller 9 when the jack 15 is actuated. It goes without saying that the actuation of the jacks 15 makes it possible to dose the pressure of the roller 11 against the roller 9.
  • each lever 13 is articulated at the free end of the rod 16 of another pneumatic cylinder 17 whose body is articulated on the frame 18 of the coating device.
  • the jacks 17 it is also possible to measure the pressure of the roller 11 on the roller 10.
  • the reserve of product 8 is limited laterally by the roller 9 and a roller 19 immobilized in rotation against the roller 9 by adjustable clamping means not shown.
  • the roller 19 is preferably mounted on free wheels thanks to which it can easily be brought into another immobilized position.
  • At least one of the rollers 9, 10 and 11 is also provided with heating means such as internal channels allowing the circulation of a heat transfer fluid.
  • heating means such as internal channels allowing the circulation of a heat transfer fluid.
  • the roller 11 has a length equal to the width of the strip 1 but is shorter than the rollers 9 and 10 which are as long as the cylinders 2 and 3.
  • roller 19 is preferably made of "Hypalon", while the roller 9 is made of chromed steel, that the roller 11 is made of elastomer, that the roller 10 is rubberized, that the cylinder 3 is made of steel and that cylinder 2 is rubberized.
  • the coating device it is possible to deposit on strips of very diverse materials, a very thin coating layer, even when the product to be deposited has a high viscosity. It suffices in fact to suitably adjust the speed of rotation of the roller 9 relative to that of the roller 10 and to judiciously dose the pressure that the roller 11 exerts on the rollers 9 and 10.
  • the coating device according to the invention can be used to deposit a layer of product on strips of different widths. It suffices to provide it with a roller 11 whose length is equal to the width of the strip to be coated. It can also function satisfactorily whatever the speed of travel of the strip 1. In this case, it suffices to act on the variator V so that the motor M 2 drives the roller 10 with a rotational speed. equal to the running speed and act on the potentiometer P to give the ratio of the speeds of rotation of the rollers 9 and 10, a determined constant value.
  • the coating device which has just been described is more particularly intended for applying a layer of a product such as a solvent-free adhesive on a strip circulating between two cylinders pressing against each other. It goes without saying, however, that it is not limited to this particular application and that it could also be used in the case where the coating product would be an ink and the strip of material would consist of a plate mounted on cylinder 2.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Materials For Medical Uses (AREA)

Abstract

The coating device of the invention, which enables a layer of product to be deposited on a strip (1) travelling between two rotary cylinders (2, 3), is characterized in that it comprises a reserve (8) containing the coating product; a first roller (9) associated with the reserve for continuously taking therefrom a specific amount of coating product; a second roller (10) bearing against one of the rotary cylinders (3, 2), the first and second rollers being parallel and spaced from each other; a third loosely mounted roller (11), bearing on the first and second rollers; means (M1) for rotating the first roller and imparting thereto a constant preadjusted speed; and means (M2) for rotating the second roller and imparting thereto a speed equal to the travelling speed of the strip, the first and second rollers rotating in the same direction .

Description

La présente invention concerne un dispositif pour appliquer en continu une couche d'enduction sur une bande de matériau circulant entre deux cylindres rotatifs s'appuyant l'un contre l'autre, ayant une vitesse de rotation égale à la vitesse de défilement de la bande et dont l'un d'eux est le cylindre applicateur de la couche d'enduction, du type comprenant une réserve contenant un produit d'enduction, un premier rouleau pour prélever en continu dans la réserve une quantité dosée de produit, des moyens pour entraîner le rouleau préleveur à une vitesse de rotation constante préréglée, et des moyens pour transférer le produit prélevé par le rouleau préleveur jusque sur le cylindre applicateur.The present invention relates to a device for continuously applying a coating layer on a strip of material circulating between two rotary cylinders bearing against one another, having a speed of rotation equal to the speed of movement of the strip and one of which is the applicator cylinder of the coating layer, of the type comprising a reserve containing a coating product, a first roller for continuously withdrawing from the reserve a metered quantity of product, means for drive the pick-up roller at a preset constant speed of rotation, and means for transferring the product picked up by the pick-up roller onto the applicator cylinder.

Les dispositifs d'enduction actuels sont conçus pour déposer des couches relativement épaisses de produits liquides ou faiblement visqueux sur des matériaux en bande très divers. Ils sont par exemple souvent utilisés pour appliquer des colles diluées dans des solvants sur des bandes de papier, de cellulose, de matière plastique ou d'aluminium. Ils ne donnent toutefois pas satisfaction quand les produits à appliquer ont une grande viscosité et doivent être déposés sous forme de film de faible épaisseur. En effet, ils ne permettent pas de déposer des produits visqueux tels que les colles sans solvants, surtout quand l'épaisseur maximum du film réalisé avec ces produits doit être comprise par exemple entre 0,4 et 5 g/m2.Current coating devices are designed to deposit relatively thick layers of liquid or slightly viscous products on a wide variety of strip materials. They are for example often used to apply adhesives diluted in solvents on strips of paper, cellulose, plastic or aluminum. However, they are not satisfactory when the products to be applied have a high viscosity and must be deposited in the form of a thin film. In fact, they do not make it possible to deposit viscous products such as adhesives without solvents, especially when the maximum thickness of the film produced with these products must be for example between 0.4 and 5 g / m 2 .

US-A-3 647 525 illustre l'état antérieur de la technique puisqu'il décrit un dispositif permettant d'appliquer un produit liquide ou faiblement visqueux sur une bande en mouvement, mais ne pouvant être utilisé de façon satisfaisante pour réaliser des enductions de faible épaisseur avec un produit très visqueux.US-A-3 647 525 illustrates the prior art since it describes a device making it possible to apply a liquid or slightly viscous product to a moving strip, but which cannot be used satisfactorily for making coatings of thin with a very viscous product.

La présente invention se propose de memé- dier à cette lacune et, pour ce faire, elle a pour objet un dispositif d'enduction du type précité, qui se caractérise en ce que les moyens de transfert comprennent un second rouleau situé entre le rouleau préleveur et le cylindre applicateur, qui s'étend parallèlement à ceux-ci mais s'appuie seulement contre le cylindre applicateur, et un troisième rouleau s'appuyant contre le rouleau préleveur et le second rouleau, le troisième rouleau étant monté fou tandis que le second rouleau est entraîné en rotation par des moyens le faisant tourner dans le même sens que le rouleau préleveur.The present invention proposes to memorize this gap and, to do this, it relates to a coating device of the aforementioned type, which is characterized in that the transfer means comprise a second roller situated between the pick-up roller. and the applicator cylinder, which extends parallel to them but bears only against the applicator cylinder, and a third roller pressing against the pick-up roller and the second roller, the third roller being mounted idly while the second roller is rotated by means rotating it in the same direction as the pick roller.

Pendant le fonctionnement du dispositif d'enduction. le premier rouleau prélève en continu dans la réserve une quantité constante de produit qu'il dirige vers le troisième rouleau. Celui-ci entraîne alors avec lui le produit qu'il reçoit du premier rouleau et le dirige vers le second rouleau. A son tour, le second rouleau entraîne le produit qu'il reçoit du troisième rouleau et le dirige vers le cylindre qui l'applique contre l'une des faces de la bande en mouvement.During the operation of the coating device. the first roller continuously draws from the reserve a constant quantity of product which it directs towards the third roller. The latter then carries with it the product which it receives from the first roller and directs it to the second roller. In turn, the second roller drives the product it receives from the third roller and directs it towards the cylinder which applies it against one of the faces of the moving strip.

Comme les premier et second rouleaux sont commandés en rotation par des moyens d'entraînement différents, la couche du produit déposée par le troisième rouleau sur le second sera d'autant plus mince que celui-ci tournera plus vite que le premier rouleau. En réglant convenablement la vitesse du premier rouleau, il est donc possible de donner à l'épaisseur de la couche du produit transféré sur le second rouleau, et par conséquent sur la bande, une valeur constante pouvant être très faible.As the first and second rollers are controlled in rotation by different drive means, the layer of product deposited by the third roller on the second will be thinner as the latter will rotate faster than the first roller. By properly adjusting the speed of the first roller, it is therefore possible to give the thickness of the layer of product transferred to the second roller, and therefore to the strip, a constant value which may be very low.

Avantageusement, le dispositif d'enduction conforme à l'invention comporte en outre des moyens pour régler la pression du troisième rouleau sur les premier et second rouleaux. Cette autre disposition permet d'agir de façon encore plus précise sur l'épaisseur et la régularité de la couche de produit d'enduction déposée sur la bande. En réglant convenablement l'intensité de la pression avec laquelle le troisième rouleau s'appui sur les premier et second rouleaux, il est en effet possible de modifier la quantité de produit pouvant être transférée du premier au second rouleau et donc de contrôler avec une plus grande précision l'épaisseur et la régularité de la couche déposée sur la bande.Advantageously, the coating device according to the invention further comprises means for adjusting the pressure of the third roller on the first and second rollers. This other arrangement makes it possible to act even more precisely on the thickness and the regularity of the layer of coating product deposited on the strip. By properly adjusting the intensity of the pressure with which the third roller rests on the first and second rollers, it is indeed possible to modify the amount of product that can be transferred from the first to the second roller and therefore to control with greater high accuracy the thickness and regularity of the layer deposited on the strip.

Selon un mode de réalisation préféré de l'invention, le troisième rouleau est porté à chacune de ses extrémités par des paliers s'appuyant sur des leviers articulés sur l'axe du premier rouleau, chaque palier étant déplaçable radialement par rapport au premier rouleau sous l'action d'un premier vérin pneumatique, tandis que chaque levier est susceptible de pivoter autour de l'axe du premier rouleau sous l'action d'un second vérin pneumatique.According to a preferred embodiment of the invention, the third roller is carried at each of its ends by bearings supported by levers articulated on the axis of the first roller, each bearing being movable radially relative to the first roller under the action of a first pneumatic cylinder, while each lever is able to pivot around the axis of the first roller under the action of a second pneumatic cylinder.

Les vérins pneumatiques permettent bien entendu de doser avec précision la pression exercée par le troisième rouleau sur les deux autres.The pneumatic cylinders of course make it possible to precisely measure the pressure exerted by the third roller on the other two.

Dans certains cas, il est par ailleurs avantageux que l'un au moins des rouleaux renferme des moyens de chauffage. En effet, lorsque le produit d'enduction est fortement visqueux, il est possible ainsi d'abaisser sa viscosité afin que son application sur la bande puisse s'effectuer dans les meilleures conditions. Des essais on montré qu'il était souhaitable de ramener la viscosité du produit autour de 2500 centipoises ou 2,5 poiseuille (m-1 - kg . s-η.In some cases, it is also advantageous for at least one of the rollers to contain heating means. Indeed, when the coating product is highly viscous, it is thus possible to lower its viscosity so that its application on the strip can be carried out under the best conditions. Tests have shown that it is desirable to reduce the viscosity of the product around 2500 centipoises or 2.5 poiseuille (m- 1 - kg. S-η.

De préférence, le troisième rouleau a une longueur égale à la largeur de la bande et est plus court que les deux autres rouleaux dont la longueur correspond à celle des cylindres de passage du matériau à enduire.Preferably, the third roller has a length equal to the width of the strip and is shorter than the other two rollers, the length of which corresponds to that of the cylinders for the passage of the material to be coated.

Le produit d'enduction n'est ainsi appliqué sur le second rouleau que sur une longueur égale à la largeur de la bande. Il s'ensuit que les opérations d'entretien ou de nettoyage du second rouleau et du cylindre qui s'appuie contre lui deviennent ainsi plus faciles.The coating product is thus applied to the second roller only over a length equal to the width of the strip. It follows that the maintenance or cleaning operations of the second roller and of the cylinder which bears against it thus become easier.

On notera ici qu'en disposant de troisièmes rouleaux de longueur différente, il est possible d'enduire des bandes de toute largeur avec le même dispositif d'enduction.It will be noted here that by having third rollers of different length, it is possible to coat strips of any width with the same coating device.

Selon un mode de réalisation particulier, la réserve de produit s'étend entre le premier rouleau et un rouleau immobilisé en rotation et appliqué contre celui-ci par des moyens de serrage réglables. En réglant convenablement la pression de serrage exercée entre le rouleau fixe et le premier rouleau, on peut bien entendu contrôler le débit du produit d'enduction prélevé dans la réserve.According to a particular embodiment, the reserve of product extends between the first roller and a roller immobilized in rotation and applied against the latter by adjustable clamping means. By properly adjusting the clamping pressure exerted between the fixed roller and the first roller, it is of course possible to control the flow rate of the coating product withdrawn from the reserve.

Un mode d'exécution de la présente invention sera décrit ci-après à titre d'exemple nullement limitatif en référence au dessin annexé dans lequel la figure unique est une vue latérale schématique du dispositif d'enduction conforme à l'invention.An embodiment of the present invention will be described below by way of non-limiting example with reference to the accompanying drawing in which the single figure is a schematic side view of the coating device according to the invention.

Le dispositif d'enduction que l'on peut voir sur le dessin permet d'appliquer une couche de produit, par exemple une colle sans solvant, sur une bande de matériau 1 circulant à vitesse constante entre deux cylindres 2 et 3 s'appuyant l'un contre l'autre et dont la vitesse de rotation est égale à la vitesse de défilement de la bande. La bande 1, dont la tension est réglée d'une manière connue en soi, passe sur un cylindre d'entraînement 4 situé en amont du cylindre 2 et entre deux cylindres moteurs 5 et 6 situés en aval du cylindre 2 et au niveau desquels une autre bande de matériau 7 est appliquée contre la face enduite de la bande 1.The coating device which can be seen in the drawing makes it possible to apply a layer of product, for example an adhesive without solvent, on a strip of material 1 circulating at constant speed between two cylinders 2 and 3 resting on the 'one against the other and whose speed of rotation is equal to the speed of travel of the strip. The strip 1, the tension of which is adjusted in a manner known per se, passes over a drive cylinder 4 located upstream of the cylinder 2 and between two driving cylinders 5 and 6 located downstream of the cylinder 2 and at which a another strip of material 7 is applied against the coated face of the strip 1.

Conformément à l'invention, le dispositif d'enduction comprend une réserve 8 contenant le produit d'enduction, un premier rouleau 9 associé à la réserve 8 pour y prélever en continu une quantité dosée de produit, un second rouleau 10 s'appuyant contre le cylindre 3 et espacé du cylindre 9, et un troisième rouleau 11 monté fou, s'appuyant sur les rouleaux 9 et 10. Un moteur à courant continu Mi, qui est relié à une source non représentée par l'intermédiaire d'un variateur de courant V et d'un potentiomètre P, est prévu pour entraîner le rouleau 9 avec une vitesse de rotation constante préréglée. Un second moteur à courant continu M2, alimenté par l'intermédiaire du variateur V, permet quant à lui d'entraîner le rouleau 10 avec une vitesse de rotation constante égale à la vitesse de défilement de la bande 1.According to the invention, the coating device comprises a reserve 8 containing the coating product, a first roller 9 associated with the reserve 8 for continuously withdrawing a metered amount of product therefrom, a second roller 10 pressing against the cylinder 3 and spaced from the cylinder 9, and a third roller 11 mounted idly, resting on the rollers 9 and 10. A DC motor M i , which is connected to a source not shown by means of a current controller V and a potentiometer P, is provided to drive the roller 9 with a preset constant speed of rotation. A second direct current motor M 2 , supplied by means of the variator V, makes it possible to drive the roller 10 with a constant rotational speed equal to the running speed of the strip 1.

On conçoit aisément qu'avec le potentiomètre P, il est possible de modifier la vitesse du rouleau 9 et donc de changer le rapport des vitesses des rouleaux 9 et 10.It is easily understood that with the potentiometer P, it is possible to modify the speed of the roller 9 and therefore to change the speed ratio of the rollers 9 and 10.

Dans l'exemple représenté, le rouleau fou 11 est porté à chacune de ses extrémités par des paliers 12 montés sur des leviers 13 articulés sur l'axe du rouleau 9. Chaque palier 12 est relié à la tige 14 d'un vérin pneumatique 15 porté par le levier correspondant 13 et peut donc se déplacer radialement par rapport au rouleau 9 lorsque le vérin 15 est actionné. Il va de soi que l'actionnement des vérins 15 permet de doser la pression du rouleau 11 contre le rouleau 9.In the example shown, the idler roller 11 is carried at each of its ends by bearings 12 mounted on levers 13 articulated on the axis of the roller 9. Each bearing 12 is connected to the rod 14 of a pneumatic cylinder 15 carried by the corresponding lever 13 and can therefore move radially relative to the roller 9 when the jack 15 is actuated. It goes without saying that the actuation of the jacks 15 makes it possible to dose the pressure of the roller 11 against the roller 9.

D'autre part, chaque levier 13 est articulé à l'extrémité libre de la tige 16 d'un autre vérin pneumatique 17 dont le corps est articulé sur le bâti 18 du dispositif d'enduction. Ainsi, en actionnant convenablement les vérins 17, il est également possible de doser la pression du rouleau 11 sur le rouleau 10.On the other hand, each lever 13 is articulated at the free end of the rod 16 of another pneumatic cylinder 17 whose body is articulated on the frame 18 of the coating device. Thus, by properly actuating the jacks 17, it is also possible to measure the pressure of the roller 11 on the roller 10.

Il convient de noter ici qu'il serait possible de prévoir une variante de réalisation dans laquelle les leviers 13 seraient articulés non pas sur l'axe du rouleau 9, mais sur l'axe du rouleau 10.It should be noted here that it would be possible to provide an alternative embodiment in which the levers 13 are articulated not on the axis of the roller 9, but on the axis of the roller 10.

La réserve de produit 8 est limitée latéralement par le rouleau 9 et un rouleau 19 immobilisé en rotation contre le rouleau 9 par des moyens de serrage réglables non représentés. Pour faciliter son nettoyage et pour permettre le rattrapage de son usure, le rouleau 19 est de préférence monté sur des roues libres grâce auxquelles il peut facilement être amené dans une autre position d'immobilisation.The reserve of product 8 is limited laterally by the roller 9 and a roller 19 immobilized in rotation against the roller 9 by adjustable clamping means not shown. To facilitate its cleaning and to allow its wear to be taken up, the roller 19 is preferably mounted on free wheels thanks to which it can easily be brought into another immobilized position.

Selon une disposition particulièrement avantageuse, l'un au moins des rouleaux 9, 10 et 11 est par ailleurs pourvu de moyens de chauffage tels que des canaux internes permettant la circulation d'un fluide caloporteur. Ainsi, lorsque le produit à déposer sur la bande 1 est particulièrement visqueux, il est possible d'abaisser sa viscosité à un point idéal d'utilisation, lequel se situe approximativement autour de 2500 centipoises ou 2,5 poiseuille (m-1 - kg . s-1). En réglant la température du fluide caloporteur, le dispositif d'enduction conforme à l'invention permet donc d'appliquer des produits dont les viscosités peuvent être réglées sur la même valeur pendant le traitement.According to a particularly advantageous arrangement, at least one of the rollers 9, 10 and 11 is also provided with heating means such as internal channels allowing the circulation of a heat transfer fluid. Thus, when the product to be deposited on the strip 1 is particularly viscous, it is possible to lower its viscosity to an ideal point of use, which is approximately around 2,500 centipoises or 2.5 poiseuille (m- 1 - kg . s- 1 ). By regulating the temperature of the heat transfer fluid, the coating device according to the invention therefore makes it possible to apply products whose viscosities can be adjusted to the same value during the treatment.

Pour être complet, on notera que le rouleau 11 a une longueur égale à la largeur de la bande 1 mais est plus court que les rouleaux 9 et 10 qui sont aussi longs que les cylindres 2 et 3.To be complete, it will be noted that the roller 11 has a length equal to the width of the strip 1 but is shorter than the rollers 9 and 10 which are as long as the cylinders 2 and 3.

On notera également que le rouleau 19 est de préférence réalisé en »Hypalon«, tandis que le rouleau 9 est en acier chromé, que le rouleau 11 est en élastomère, que le rouleau 10 est caoutchouté, que le cylindre 3 est en acier et que le cylindre 2 est caoutchouté.It should also be noted that the roller 19 is preferably made of "Hypalon", while the roller 9 is made of chromed steel, that the roller 11 is made of elastomer, that the roller 10 is rubberized, that the cylinder 3 is made of steel and that cylinder 2 is rubberized.

Grâce au dispositif d'enduction conforme à l'invention, il est possible de déposer sur des bandes de matériaux très divers, une couche d'enduction très mince, même quand le produit à déposer présente une grande viscosité. Il suffit en effet de régler convenablement la vitesse de rotation du rouleau 9 par rapport à celle du rouleau 10 et de doser judicieusement la pression que le rouleau 11 exerce sur les rouleaux 9 et 10.Thanks to the coating device according to the invention, it is possible to deposit on strips of very diverse materials, a very thin coating layer, even when the product to be deposited has a high viscosity. It suffices in fact to suitably adjust the speed of rotation of the roller 9 relative to that of the roller 10 and to judiciously dose the pressure that the roller 11 exerts on the rollers 9 and 10.

A titre d'exemple, on donnera ci-dessous les différents paramètres de fonctionnement qui ont été choisis pour déposer sur une bande de papier une colle sans solvant ayant une viscosité de 133 poises ou 13,3 pouseuille (m-1 - kg . s-1) à 20° C et devant former un film ayant une épaisseur de 0,9 g/m2.

  • - Vitesse de rotation du rouleau 10 (égale à la vitesse de défilement de la bande): 150 m/ mn.
  • - Vitesse de rotation du rouleau 9: 15 m/mn.
  • - Pression exercée entre les rouleaux 9 et 19: 4 bars.
  • - Pression exercée entre les rouleaux 9 et 11: 2,5 bars.
  • - Pression exercée entre le rouleaux 10 et 11: 2 bars.
  • - Pression exercée entre le rouleau 10 et le cylindre 3: 4 bars.
  • - Pression exercée entre les cylindres 2 et 3: 4 bars.
  • - Température du rouleau 9 dans lequel circule un fluide caloporteur: 35° C.
As an example, we will give below the various operating parameters which have been chosen for depositing on a strip of paper an adhesive without solvent having a viscosity of 133 poises or 13.3 dust (m- 1 - kg. S - 1 ) at 20 ° C and to form a film having a thickness of 0.9 g / m2.
  • - Rotation speed of roller 10 (equal to the speed of movement of the strip): 150 m / min.
  • - Roller speed 9: 15 m / min.
  • - Pressure exerted between rollers 9 and 19: 4 bars.
  • - Pressure exerted between rollers 9 and 11: 2.5 bars.
  • - Pressure exerted between rollers 10 and 11: 2 bars.
  • - Pressure exerted between roller 10 and cylinder 3: 4 bars.
  • - Pressure exerted between cylinders 2 and 3: 4 bars.
  • - Temperature of the roller 9 in which a heat transfer fluid circulates: 35 ° C.

Le dispositif d'enduction conforme à l'invention peut être utilisé pour déposer une couche de produit sur des bandes de différentes largeurs. Il suffit en effet de le pourvoir d'un rouleau 11 dont la longueur est égale à la largeur de la bande à enduire. Il peut en outre fonctionner de façon satisfaisante quelle que soit la vitesse de défilement de la bande 1. Dans ce cas, il suffit en effet d'agir sur le variateur V pour que le moteur M2 entraîne le rouleau 10 avec une vitesse de rotation égale à la vitesse de défilement et d'agir sur le potentiomètre P pour donner au rapport des vitesses de rotation des rouleaux 9 et 10, une valeur constante déterminée.The coating device according to the invention can be used to deposit a layer of product on strips of different widths. It suffices to provide it with a roller 11 whose length is equal to the width of the strip to be coated. It can also function satisfactorily whatever the speed of travel of the strip 1. In this case, it suffices to act on the variator V so that the motor M 2 drives the roller 10 with a rotational speed. equal to the running speed and act on the potentiometer P to give the ratio of the speeds of rotation of the rollers 9 and 10, a determined constant value.

Selon l'épaisseur et la nature de la couche d'enduction à déposer, il convient bien entendu de régler le rapport des vitesses des rouleaux 9 et 10, de doser la pression exercée par le rouleau 11 sur les rouleaux 9 et 10, et de porter le fluide caloporteur à une température pour laquelle la viscosité du produit d'enduction peut prendre la valeur convenant le mieux pour l'enduction.Depending on the thickness and the nature of the coating layer to be deposited, it is of course appropriate to adjust the speed ratio of the rollers 9 and 10, to measure the pressure exerted by the roller 11 on the rollers 9 and 10, and bring the heat transfer fluid to a temperature for which the viscosity of the coating product can take the value most suitable for coating.

Le dispositif d'enduction qui vient d'être décrit est plus particulièrement destiné à appliquer une couche d'un produit tel qu'une colle sans solvant sur une bande circulant entre deux cylindres s'appuyant l'un contre l'autre. Il va de soi cependant qu'il n'est pas limité à cette application particulière et qu'il pourrait également être utilisé dans le cas où le produit d'enduction serait une encre et où la bande de matériau serait constituée par un cliché monté sur le cylindre 2.The coating device which has just been described is more particularly intended for applying a layer of a product such as a solvent-free adhesive on a strip circulating between two cylinders pressing against each other. It goes without saying, however, that it is not limited to this particular application and that it could also be used in the case where the coating product would be an ink and the strip of material would consist of a plate mounted on cylinder 2.

Claims (6)

1. A device for continually applying a coating layer to a strip of material (1) travelling between two rotating cylinders (2, 3) bearing one against the other, having a rotational speed equal to the travelling speed of the strip (1) and one (3) of which is the roller for applying the coating layer, of the type comprising a reserve (8) containing a coating product, a first roller (9) for continuously taking from the reserve (8) a controlled amount of product, means (Mi, P) for driving the take up roll, (9) at a constant preset rotational speed, and means for transferring the product taken by the take up roller (9) to the applicator cylinder (3), characterized in that transfer means comprise a second roller (10) situated between the take up roller (9) and the applicator cylinder (3), which extends parallel thereto but only bears against the applicator cylinder (3), and a third roller (11) bearing against the take up roller (9) and the second roller (10), the third roller (11) being mounted freely rotatable whereas the second roller (10) is rotated by means (MZ) causing it to rotate in the same direction as the take up roller (9).
2. The device according to claim 1, characterized in that it further comprises means (15; 17) for adjusting the pressure of the third roller (11) on the first and second rollers (9, 10).
3. The device according to claim 2, characterized in that the third roller (11) is supported at each of its ends by bearings (12) bearing on levers (13) pivotably mounted on the shaft of the take up roller (9), each bearing being radially moveable with respect to the take up roller (9) under the action of a first pneumatic cylinder (15), whereas each lever (13) is adapted to pivot about the shaft or the take up roller (9) under the action of a second pneumatic cylinder (17).
4. The device according to any one of the preceding claims, characterized in that one at least of the rollers (9, 10, 11) comprises heating means.
5. The device according to any one of the preceding claims, characterized in that the third roller (11) has a length equal to the width of the strip (1) and is shorter than the other two rollers (9, 10) whose length corresponds to that of the cylinders (2, 3).
6. The device according to any one of the preceding claims, characterized in that the reserve of product (8) extends between the take up roller (9) and a roller (19) secured against rotation and applied there against by adjustable clamping means.
EP81400510A 1980-04-16 1981-03-30 Apparatus for applying a coating layer to a continuously travelling web Expired EP0038729B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81400510T ATE8112T1 (en) 1980-04-16 1981-03-30 DEVICE FOR APPLYING A COATING LAYER ON A CONTINUOUS STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8008553A FR2480627A1 (en) 1980-04-16 1980-04-16 DEVICE FOR APPLYING A COATING LAYER ON A BAND OF CONTINUOUS CIRCULATING MATERIAL
FR8008553 1980-04-16

Publications (2)

Publication Number Publication Date
EP0038729A1 EP0038729A1 (en) 1981-10-28
EP0038729B1 true EP0038729B1 (en) 1984-06-27

Family

ID=9240963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400510A Expired EP0038729B1 (en) 1980-04-16 1981-03-30 Apparatus for applying a coating layer to a continuously travelling web

Country Status (7)

Country Link
US (1) US4363288A (en)
EP (1) EP0038729B1 (en)
JP (1) JPS56161858A (en)
AT (1) ATE8112T1 (en)
DE (1) DE3164393D1 (en)
ES (1) ES501360A0 (en)
FR (1) FR2480627A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5939515A (en) * 1982-08-31 1984-03-03 Sumitomo Heavy Ind Ltd Manufacture of laminated web
US4530306A (en) * 1984-01-06 1985-07-23 Graphic Enterprises Of Ohio, Inc. Coating device for plates
US4610216A (en) * 1985-04-02 1986-09-09 Gustav Paulsen Paper coloring apparatus
IT1221690B (en) * 1987-10-30 1990-07-12 Nordmeccanica Spa MACHINE FOR COUPLING PLASTIC FILMS, WITH PERFECTED ADHESIVE SPREADING DEVICES
DE3938447A1 (en) * 1989-11-18 1991-05-23 Roland Man Druckmasch INKWORK WITH ZONAL DOSAGE OF COLOR QUANTITY
ITPC20050017A1 (en) * 2005-04-04 2006-10-05 Nordmeccanica Spa IMPROVED GROUP FOR THE COATING OF ADHESIVE IN PARTICULAR FOR COUPLING MACHINES
EP3851210A1 (en) * 2020-01-14 2021-07-21 Jesús Francisco Barberan Latorre Applicator roller

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Publication number Priority date Publication date Assignee Title
FR1007182A (en) * 1948-03-03 1952-05-02 Improvements to processes for applying to flexible or flexible materials in the form of strips or sheets, a protective or decorative coating, transparent or translucent
US2614522A (en) * 1948-09-22 1952-10-21 William T Snyder Coating machine for coating flexible sheets
US2606520A (en) * 1949-03-12 1952-08-12 Paper Patents Co Paper-coating machine
GB759138A (en) * 1951-06-19 1956-10-17 Nordisk Aluminium Ind As Improved machine for the application of surface coating material to strips of metal or other solid material
US3084449A (en) * 1958-04-03 1963-04-09 Hamilton Tool Co Method and apparatus for producing air-cooled carbon-coated paper
US3647525A (en) * 1959-10-05 1972-03-07 Dahlgren Mfg Co Method and means for applying liquid to a moving web
FR1296407A (en) * 1961-07-31 1962-06-15 Cons Water Power & Paper Co Paper Coating Apparatus
US3265034A (en) * 1963-10-31 1966-08-09 Burroughs Corp Coating apparatus with cooling back-up roll
DE1652321A1 (en) * 1967-06-03 1971-02-18 Feldmuehle Ag Roller coater
US3769909A (en) * 1971-03-10 1973-11-06 Rockwell International Corp Wet nip dampener
GB1404616A (en) * 1972-11-27 1975-09-03 Wiggins Teape Research Dev Ltd Apparatus for applying a coating to a web of material
GB1492962A (en) * 1974-02-19 1977-11-23 Alcan Res & Dev Method and apparatus for applying coating compositions to strip material
US4237785A (en) * 1978-04-18 1980-12-09 Dahlgren Harold P Inker for applying newsprint type ink
DE2916212A1 (en) * 1979-04-21 1980-10-23 Maschf Augsburg Nuernberg Ag INK FOR A PRINTING MACHINE

Also Published As

Publication number Publication date
DE3164393D1 (en) 1984-08-02
ATE8112T1 (en) 1984-07-15
US4363288A (en) 1982-12-14
JPS56161858A (en) 1981-12-12
FR2480627B1 (en) 1984-10-19
ES8202494A1 (en) 1982-02-16
EP0038729A1 (en) 1981-10-28
ES501360A0 (en) 1982-02-16
FR2480627A1 (en) 1981-10-23

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