EP0842709B1 - Process for continuously coating a metallurgical product in continuous motion with an organic coating and apparatus therefor - Google Patents

Process for continuously coating a metallurgical product in continuous motion with an organic coating and apparatus therefor Download PDF

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Publication number
EP0842709B1
EP0842709B1 EP97402397A EP97402397A EP0842709B1 EP 0842709 B1 EP0842709 B1 EP 0842709B1 EP 97402397 A EP97402397 A EP 97402397A EP 97402397 A EP97402397 A EP 97402397A EP 0842709 B1 EP0842709 B1 EP 0842709B1
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EP
European Patent Office
Prior art keywords
roller
organic material
tank
coating
bath
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97402397A
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German (de)
French (fr)
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EP0842709A1 (en
Inventor
Denis Clerc
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Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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Classifications

    • 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
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers

Definitions

  • the invention relates to the continuous application of a organic coating on a metallurgical product in scrolling, in particular the continuous coating of steel strips with resin.
  • the steel strips after being rolled, can then undergo various metallurgical treatments, such as continuous annealing and electrogalvanizing, followed a finishing surface treatment per application an organic coating made of resin.
  • the tank is continuously supplied with organic material liquid by means of a feed ramp plunging into the bath of said liquid organic material.
  • This feed generates air bubbles on the surface of the bath which are entrained with the liquid organic material on the rollers in rotation, then finally transferred to the moving strip, thus altering its appearance of area.
  • this partition used as an anti-bubble barrier only solves part of the problem posed by the transfer of the bubbles to the moving strip. Indeed the roller (s) whose lower part is submerged in the bath of liquid organic material generate by their rotation of air bubbles on the surface of the bath, which through the other rollers are going to be transferred to the running tape.
  • rollers placed above the bath surface of liquid organic material generate also air bubbles on the surface of the bath when drop on the surface of the bath of excess material organic liquid not adhering to said rollers.
  • the object of the invention is to propose a means preventing bubbles generated by rotating rollers and by the power rail to be transferred with the liquid organic material on the moving web and to alter its surface appearance.
  • the subject of the invention is a method continuous application of an organic coating on a metallurgical product running from a bath liquid organic material in a container and likely to contain air bubbles, transfer of said liquid organic material on the product being produced in a coating area, characterized in that to eliminate said air bubbles, we create in at least a bath area, located upstream of said area coating, an updraft in the liquid material so as to bring the bubbles contained in the bath to the near its surface and cause it to burst.
  • the flow of the supply rail 1 is between 50 and 60 l / min adapted to the type of resin used. This feeding in liquid organic material 3 in tray 2 generates air bubbles on the surface of the bath.
  • a roller called pick-up roller 4 the end of which lower is immersed in tray 2 containing the liquid organic material 3, transfers said material liquid organic on a roll called applicator roll 5, which in turn transfers the organic material liquid on the metallurgical product 7 in movement held by a holding roller 6.
  • the speed of scrolling of the metallurgical product 7 is understood by example between 60 and 80 m / min.
  • the rotation of the pick roller 4 generates the formation air bubbles when said roller attacks the surface of the bath. Some of these air bubbles can be driven with the rotation of said pick roller 4 and transferred with liquid organic material 3 to the applicator roller 5 then finally on the product metallurgical 7.
  • a roller called a mobile roller 8 is interposed between the feed ramp 1 and the roller taker 4. It is immersed in its lower part in the bath of liquid organic material 3 at about 2 cm from the surface and rotated in the opposite direction to that of pick-up roller 4 to create in the liquid bath 3 in front of the coating area an updraft of so as to bring the air bubbles contained in the bath near the surface. Ideally the speed of rotation of the movable roller 8 is low, so that the rotational movement in the bath does not generate new air bubbles.
  • the movable roller 8 has another advantage which is that of entraining the air bubbles adhering to its surface, which is no longer in contact with the material organic liquid 3 eventually burst.
  • the bath of liquid organic material in the vicinity of the pick-up roller 4 is free of air bubbles and allows thus obtaining a strip coated with organic material having a very good surface appearance.
  • An exemplary embodiment of the present invention uses a tank 2 shown diagrammatically in section, having vertical walls, namely an upstream wall x straight and an inclined downstream wall.
  • the length of the tank 2 is 2.30 m, its width 95 cm at the top and 75 cm at the bottom and, its depth of 13 cm.
  • the downstream wall is inclined there, in order to limit the disturbances in the liquid organic material bath 3.
  • the feed ramp 1 placed near the vertical wall x of tank 2 consists of a pipe horizontal with a length of 1.55 m and a diameter of 3 4 cm to which four oblique pipes are connected, or vertical verticals of 16 cm and 3 to 4 cm in diameter, spaced 40 cm apart, the ends of which 3 to 4 mm in diameter immerse in the material bath liquid organic 3.
  • the movable roller 8 consisting of a steel core coated with a 3 to 4 cm layer of rubber thick, 25 cm in diameter and 2 m long is immersed in the bath of liquid organic material 3 in its lower part to a depth of 2 cm.
  • the spacing between the pick roller 4, consisting of steel core coated with chromium, 25 cm in diameter and length of about 2 m, and the movable roller 8 is 5 cm.
  • the applicator roller 5 consisting of a core made of steel coated with a rubber layer with a diameter of 30 cm and about 2 m long, can be used up to a certain level of wear on the rubber, i.e. when the diameter of said roller reaches 25.5 cm.
  • the running speed of the metallurgical product 7 is 60 to 80 m / min. If we take 100 as the basis for this speed, the speed of the applicator roller 5 varies from 130 to 160% of the scrolling speed, the speed of the take-up roller 4 varies from 40 to 60% of the speed of scrolling and the speed of the movable roller 8 is 5 to 15% (typically 10%) of the frame rate.
  • Liquid organic materials 3 applied to metal strips 7 thanks to such an installation are for example very fluid resins whose viscosity dynamic is around 10 cP.
  • resin used there may be mentioned SOLPLEX, resin based on silica commonly used in the automotive industry and whose coating thickness is around 7 ⁇ m in wet layer.
  • the flow rate of the fuel rail pump varies between 50 to 60 l / min depending on the viscosity of the resin.
  • roller mobile 8 can be replaced by any other means a moving surface whose movement creates a current ascending within the organic material bath.

Landscapes

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

Abstract

The method involves applying, for example, a resin product to a continuously moving steel strip (7) so it receives a coating from pick-up (4) and applicator (5) rollers. A current is generated in the liquid in front of the coating zone to drive any air bubbles to the surface so they burst. The coating apparatus consists of a bath (2) for the coating liquid (3) which is fed continuously down a sloping surface (1), while the current is created by a roller (8) which is partially immersed in the liquid and turns in the same direction as the pick-up roller and at a speed which is between 5 and 15 per cent of that of the steel strip.

Description

L'invention concerne l'application en continu d'un revêtement organique sur un produit métallurgique en défilement, en particulier l'enduction en continu des bandes d'acier par une résine.The invention relates to the continuous application of a organic coating on a metallurgical product in scrolling, in particular the continuous coating of steel strips with resin.

Les bandes d'acier, après avoir été laminées, peuvent subir ensuite divers traitements métallurgiques, tels qu'un recuit continu et un électrozingage, suivis d'un traitement de surface de finition par application d'un revêtement organique constitué de résine.The steel strips, after being rolled, can then undergo various metallurgical treatments, such as continuous annealing and electrogalvanizing, followed a finishing surface treatment per application an organic coating made of resin.

L'application en continu d'un matériau organique liquide tel qu'une résine ou une peinture s'effectue le plus souvent par enduction au rouleau. L'installation requise comporte un bac alimenté en continu par ledit matériau organique liquide au moyen d'une rampe d'alimentation. Une série de rouleaux en rotation, dont la partie inférieure de l'un d'entre eux au moins est immergée dans le bac, sont agencés de façon à ce que le matériau organique liquide soit appliqué uniformément sur la bande en défilement.Continuous application of organic material liquid such as resin or paint is done on more often by roller coating. The installation required includes a tank continuously fed by said liquid organic material by means of a ramp Power. A series of rotating rollers, the lower part of at least one of them is immersed in the tank, are arranged so that the liquid organic material is applied evenly over the running tape.

Le bac est alimenté continûment en matériau organique liquide au moyen d'une rampe d'alimentation plongeant dans le bain dudit matériau organique liquide. Cette alimentation génère des bulles d'air en surface du bain qui sont entraínées avec le matériau organique liquide sur les rouleaux en rotation, puis finalement transférées sur la bande en défilement, altérant ainsi son aspect de surface.The tank is continuously supplied with organic material liquid by means of a feed ramp plunging into the bath of said liquid organic material. This feed generates air bubbles on the surface of the bath which are entrained with the liquid organic material on the rollers in rotation, then finally transferred to the moving strip, thus altering its appearance of area.

Un moyen connu de pallier cet inconvénient est de placer dans le bac une cloison faisant office de barrage entre la rampe d'alimentation et les rouleaux en rotation. Les bulles d'air stagnant à la surface du bain sont ainsi retenues par la cloison, un passage ménagé dans la partie inférieure du bac permettant la libre circulation du matériau organique liquide débarrassé des bulles d'air, et par suite l'obtention de bandes ayant un bon aspect de surface.One known way to overcome this drawback is to place in the bin a partition acting as a barrier between the feed ramp and the rotating rollers. Air bubbles stagnating on the surface of the bath are thus retained by the partition, a passage in the part bottom of the tank allowing the free circulation of liquid organic material free of air bubbles, and consequently obtaining bands having a good aspect of area.

Cependant cette cloison utilisée comme barrage anti-bulles ne résout qu'une partie du problème posé par le transfert des bulles sur la bande en défilement. En effet le ou les rouleaux dont la partie inférieure est immergée dans le bain de matériau organique liquide génèrent de par leur rotation des bulles d'air à la surface du bain, qui par l'intermédiaire des autres rouleaux vont être transférées sur la bande en défilement.However, this partition used as an anti-bubble barrier only solves part of the problem posed by the transfer of the bubbles to the moving strip. Indeed the roller (s) whose lower part is submerged in the bath of liquid organic material generate by their rotation of air bubbles on the surface of the bath, which through the other rollers are going to be transferred to the running tape.

De surcroít, les rouleaux placés au dessus de la surface du bain de matériau organique liquide génèrent également des bulles d'air à la surface du bain lors de la chute sur la surface du bain de l'excès de matériau organique liquide n'adhérant pas auxdits rouleaux.In addition, the rollers placed above the bath surface of liquid organic material generate also air bubbles on the surface of the bath when drop on the surface of the bath of excess material organic liquid not adhering to said rollers.

Le but de l'invention est de proposer un moyen empêchant les bulles générées par les rouleaux en rotation et par la rampe d'alimentation d'être transférées avec le matériau organique liquide sur la bande en défilement et d'en altérer son aspect de surface.The object of the invention is to propose a means preventing bubbles generated by rotating rollers and by the power rail to be transferred with the liquid organic material on the moving web and to alter its surface appearance.

A cet effet, l'invention a pour objet un procédé d'application en continu d'un revêtement organique sur un produit métallurgique en défilement à partir d'un bain d'un matériau organique liquide contenu dans un bac et susceptible de contenir des bulles d'air, le transfert dudit matériau organique liquide sur le produit étant réalisé dans une zone d'enduction, caractérisé en ce que pour éliminer lesdites bulles d'air, on crée dans au moins une zone du bain, située en amont de ladite zone d'enduction, un courant ascendant dans le matériau liquide de manière à amener les bulles contenues dans le bain au voisinage de sa surface et provoquer leur éclatement.To this end, the subject of the invention is a method continuous application of an organic coating on a metallurgical product running from a bath liquid organic material in a container and likely to contain air bubbles, transfer of said liquid organic material on the product being produced in a coating area, characterized in that to eliminate said air bubbles, we create in at least a bath area, located upstream of said area coating, an updraft in the liquid material so as to bring the bubbles contained in the bath to the near its surface and cause it to burst.

L'invention a également pour objet un dispositif d'application en continu d'un revêtement organique sur un produit métallurgique 7 en défilement pour la mise en oeuvre du procédé précédemment décrit, ledit dispositif comprenant:

  • un bac 2 contenant un matériau organique liquide 3,
  • une rampe 1 plongeant dans le bain de matériau organique 3 et alimentant continûment le bac 2 en matériau organique liquide 3,
  • des moyens de défilement du produit métallurgique comportant un rouleau dit rouleau de maintien 6,
  • un rouleau dit rouleau preneur 4 dont la partie inférieure est immergée dans ledit bac 2 contenant le matériau organique liquide 3, ledit rouleau preneur 4 transférant le matériau organique 3 sur un rouleau dit rouleau applicateur 5 lequel transfère à son tour le matériau organique 3 sur le produit métallurgique 7 en défilement, caractérisé en ce qu'il comporte des moyens pour créer un courant ascendant dans au moins une zone du bac placée entre la rampe d'alimentation 1 et le rouleau preneur 4, pour retenir les bulles d'air générées par la rampe d'alimentation 1 et attirer les bulles d'air générées par le rouleau preneur 4 et par la chute dans le bac du matériau organique non adhérant au point de contact du rouleau applicateur 5 et du rouleau preneur 4.
The subject of the invention is also a device for continuously applying an organic coating to a metallurgical product 7 in movement for implementing the method described above, said device comprising:
  • a tank 2 containing a liquid organic material 3,
  • a ramp 1 dipping into the bath of organic material 3 and continuously supplying the tank 2 with liquid organic material 3,
  • means for running the metallurgical product comprising a roller known as a holding roller 6,
  • a roller called pick-up roller 4, the lower part of which is immersed in said tank 2 containing the liquid organic material 3, said pick-up roller 4 transferring the organic material 3 onto a roll called application roller 5 which in turn transfers the organic material 3 onto the metallurgical product 7 in movement, characterized in that it comprises means for creating an ascending current in at least one area of the tank placed between the feed ramp 1 and the pick roller 4, to retain the air bubbles generated by the feed ramp 1 and attract the air bubbles generated by the pick-up roller 4 and by the fall into the tank of organic material not adhering to the point of contact of the applicator roll 5 and the take-up roller 4.

L'invention sera mieux comprise à la lecture de la description qui suit, donnée en référence à la figure unique annexée qui représente schématiquement, vu en coupe longitudinale, un exemple d'un dispositif anti-bulles d'une installation de revêtement selon l'invention.The invention will be better understood on reading the description which follows, given with reference to the figure single annexed which represents schematically, seen in section longitudinal, an example of an anti-bubble device of a coating installation according to the invention.

Une rampe d'alimentation 1 plongeant dans un bac 2 de matériau organique liquide 3, ledit matériau organique étant une résine à l'état liquide, alimente ledit bac en continu en ce matériau organique liquide. Le débit de la rampe d'alimentation 1 est compris entre 50 et 60 l/mn adapté au type de résine utilisée. Cette alimentation en matériau organique liquide 3 dans le bac 2 génère des bulles d'air à la surface du bain.A feed ramp 1 plunging into a tank 2 of liquid organic material 3, said organic material being a resin in the liquid state, feeds said tank with continuous in this liquid organic material. The flow of the supply rail 1 is between 50 and 60 l / min adapted to the type of resin used. This feeding in liquid organic material 3 in tray 2 generates air bubbles on the surface of the bath.

Un rouleau dit rouleau preneur 4, dont l'extrémité inférieure est immergée dans le bac 2 contenant le matériau organique liquide 3, transfère ledit matériau organique liquide sur un rouleau dit rouleau applicateur 5, lequel transfère à son tour le matériau organique liquide sur le produit métallurgique 7 en défilement maintenu par un rouleau de maintien 6. La vitesse de défilement du produit métallurgique 7 est comprise par exemple entre 60 et 80 m/mn.A roller called pick-up roller 4, the end of which lower is immersed in tray 2 containing the liquid organic material 3, transfers said material liquid organic on a roll called applicator roll 5, which in turn transfers the organic material liquid on the metallurgical product 7 in movement held by a holding roller 6. The speed of scrolling of the metallurgical product 7 is understood by example between 60 and 80 m / min.

La rotation du rouleau preneur 4 génère la formation de bulles d'air lorsque ledit rouleau attaque la surface du bain. Une partie de ces bulles d'air peuvent être entraínées avec la rotation dudit rouleau preneur 4 et transférées avec le matériau organique liquide 3 sur le rouleau applicateur 5 puis finalement sur le produit métallurgique 7.The rotation of the pick roller 4 generates the formation air bubbles when said roller attacks the surface of the bath. Some of these air bubbles can be driven with the rotation of said pick roller 4 and transferred with liquid organic material 3 to the applicator roller 5 then finally on the product metallurgical 7.

L'excès de matériau organique n'adhérant pas aux points de contact du rouleau preneur 4 et du rouleau applicateur 5 provoque la chute d'égouttures dudit matériau organique liquide dans le bain, provoquant la formation de bulles d'air à la surface du bain de matériau organique liquide 3.Excess organic material not adhering to pickup roller 4 and roller contact points applicator 5 causes said drops to drop liquid organic material in the bath, causing the formation of air bubbles on the surface of the material bath organic liquid 3.

Selon l'invention un rouleau dit rouleau mobile 8 est interposé entre la rampe d'alimentation 1 et le rouleau preneur 4. Il est immergé dans sa partie inférieure dans le bain de matériau organique liquide 3 à environ 2 cm de la surface et mis en rotation en sens inverse de celui du rouleau preneur 4 afin de créer dans le bain de liquide 3 en avant de la zone d'enduction un courant ascendant de manière à amener les bulles d'air contenues dans le bain au voisinage de la surface. Idéalement la vitesse de rotation du rouleau mobile 8 est faible, afin que le mouvement de rotation dans le bain ne génère pas de nouvelles bulles d'air.According to the invention, a roller called a mobile roller 8 is interposed between the feed ramp 1 and the roller taker 4. It is immersed in its lower part in the bath of liquid organic material 3 at about 2 cm from the surface and rotated in the opposite direction to that of pick-up roller 4 to create in the liquid bath 3 in front of the coating area an updraft of so as to bring the air bubbles contained in the bath near the surface. Ideally the speed of rotation of the movable roller 8 is low, so that the rotational movement in the bath does not generate new air bubbles.

Le rouleau mobile 8 présente un autre avantage qui est celui d'entraíner les bulles d'air adhérant à sa surface, qui n'étant plus en contact avec le matériau organique liquide 3 finissent par éclater.The movable roller 8 has another advantage which is that of entraining the air bubbles adhering to its surface, which is no longer in contact with the material organic liquid 3 eventually burst.

Le bain de matériau organique liquide au voisinage du rouleau preneur 4 est exempt de bulles d'air et permet ainsi d'obtenir une bande revêtue du matériau organique ayant un très bon aspect de surface.The bath of liquid organic material in the vicinity of the pick-up roller 4 is free of air bubbles and allows thus obtaining a strip coated with organic material having a very good surface appearance.

Un exemple de réalisation de la présente invention utilise un bac 2 représenté schématiquement en coupe, présentant des parois verticales, à savoir une paroi amont x droite et une paroi aval y inclinée. La longueur du bac 2 est de 2,30 m, sa largeur de 95 cm en partie supérieure et de 75 cm en partie inférieure et, sa profondeur de 13 cm. La paroi aval y est inclinée, afin de limiter les perturbations dans le bain de matériau organique liquide 3. La rampe d'alimentation 1 placée au voisinage de la paroi verticale x du bac 2 est constituée d'un tuyau horizontal d'une longueur de 1,55 m et d'un diamètre de 3 à 4 cm auquel sont connectés quatre tuyaux obliques ou verticaux longs de 16 cm et de 3 à 4 cm de diamètre, espacés les uns des autres de 40 cm, dont les extrémités de 3 à 4 mm de diamètre plongent dans le bain de matériau organique liquide 3.An exemplary embodiment of the present invention uses a tank 2 shown diagrammatically in section, having vertical walls, namely an upstream wall x straight and an inclined downstream wall. The length of the tank 2 is 2.30 m, its width 95 cm at the top and 75 cm at the bottom and, its depth of 13 cm. The downstream wall is inclined there, in order to limit the disturbances in the liquid organic material bath 3. The feed ramp 1 placed near the vertical wall x of tank 2 consists of a pipe horizontal with a length of 1.55 m and a diameter of 3 4 cm to which four oblique pipes are connected, or vertical verticals of 16 cm and 3 to 4 cm in diameter, spaced 40 cm apart, the ends of which 3 to 4 mm in diameter immerse in the material bath liquid organic 3.

Le rouleau mobile 8 constitué d'une âme en acier revêtue d'une couche de caoutchouc de 3 à 4 cm d'épaisseur, de diamètre de 25 cm et de longueur de 2 m est immergé dans le bain de matériau organique liquide 3 dans sa partie inférieure à une profondeur de 2 cm. L'écartement entre le rouleau preneur 4, constitué d'une âme en acier revêtue de chrome de diamètre de 25 cm et de longueur de 2 m environ, et le rouleau mobile 8 est de 5 cm.The movable roller 8 consisting of a steel core coated with a 3 to 4 cm layer of rubber thick, 25 cm in diameter and 2 m long is immersed in the bath of liquid organic material 3 in its lower part to a depth of 2 cm. The spacing between the pick roller 4, consisting of steel core coated with chromium, 25 cm in diameter and length of about 2 m, and the movable roller 8 is 5 cm.

Le rouleau applicateur 5, constitué d'une âme en acier revêtue d'une couche de caoutchouc de diamètre de 30 cm et de longueur de 2 m environ, est utilisable jusqu'à un certain niveau d'usure du caoutchouc, soit quand le diamètre dudit rouleau atteint 25,5 cm.The applicator roller 5, consisting of a core made of steel coated with a rubber layer with a diameter of 30 cm and about 2 m long, can be used up to a certain level of wear on the rubber, i.e. when the diameter of said roller reaches 25.5 cm.

La vitesse de défilement du produit métallurgique 7 est de 60 à 80 m/mn. Si l'on prend 100 comme base pour cette vitesse, la vitesse du rouleau applicateur 5 varie de 130 à 160 % de la vitesse de défilement, la vitesse du rouleau preneur 4 varie de 40 à 60 % de la vitesse de défilement et la vitesse du rouleau mobile 8 est de 5 à 15 % (typiquement 10 %) de la vitesse de défilement.The running speed of the metallurgical product 7 is 60 to 80 m / min. If we take 100 as the basis for this speed, the speed of the applicator roller 5 varies from 130 to 160% of the scrolling speed, the speed of the take-up roller 4 varies from 40 to 60% of the speed of scrolling and the speed of the movable roller 8 is 5 to 15% (typically 10%) of the frame rate.

Les matériaux organiques liquides 3 appliqués sur des bandes métalliques 7 grâce à une telle installation sont par exemple des résines très fluides dont la viscosité dynamique est d'environ 10 cP. A titre d'exemple de résine utilisée, on peut citer le SOLPLEX, résine à base de silice couramment employée dans l'industrie automobile et dont l'épaisseur du revêtement est de l'ordre de 7 µm en couche humide.Liquid organic materials 3 applied to metal strips 7 thanks to such an installation are for example very fluid resins whose viscosity dynamic is around 10 cP. As an example of resin used, there may be mentioned SOLPLEX, resin based on silica commonly used in the automotive industry and whose coating thickness is around 7 µm in wet layer.

Le débit de la pompe de la rampe d'alimentation varie entre 50 à 60 l/mn selon la viscosité de la résine.The flow rate of the fuel rail pump varies between 50 to 60 l / min depending on the viscosity of the resin.

Bien entendu, l'invention n'est pas limitée à l'exemple qui a été décrit et représenté, le rouleau mobile 8 peut être remplacé par tout autre moyen constitué d'une surface mobile dont le mouvement crée un courant ascendant au sein du bain de matériau organique.Of course, the invention is not limited to the example which has been described and represented, the roller mobile 8 can be replaced by any other means a moving surface whose movement creates a current ascending within the organic material bath.

Claims (7)

  1. Process for the continuous application of an organic coating to a running metallurgical product from a bath of a liquid organic material contained in a tank and liable to include air bubbles, the said liquid organic material being transferred to the product in a coating region, characterized in that, in order to remove the said air bubbles, an ascending current is created in the liquid material, in at least one region of the bath located upstream of the said coating region, so as to bring the bubbles in the bath into the vicinity of its surface and cause them to burst.
  2. Process according to Claim 1, characterized in that the said air bubbles are entrained by an ascending current generated by the movement of an element to the surface of which the said bubbles will adhere.
  3. Device for the continuous application of an organic coating to a running metallurgical product (7) for the implementation of the process according to Claim 1 or 2, which device comprises:
    a tank (2) containing a liquid organic material (3) ;
    an injector (1) dipped into the said bath of organic material (3) and continuously supplying the tank (2) with liquid organic material (3);
    means for running the metallurgical product, comprising a roller called a holding roller (6);
    a roller called the transfer roller (4), the lower part of which is immersed in the said tank (2) containing the liquid organic material (3), the said transfer roller (4) transferring the organic material (3) onto a roller called the applicator roller (5) which in turn transfers the organic material (3) onto the running metallurgical product (7), characterized in that it includes means for creating an ascending current in at least one region of the tank, placed between the feed injector (1) and the transfer roller (4), in order to retain the air bubbles generated by the feed injector (1) and to attract the air bubbles generated by the transfer roller (4) and by the descent into the tank of the organic material not adhering to the point of contact between the applicator roller (5) and the transfer roller (4).
  4. Device according to Claim 3, characterized in that the said means consist of an element having a moving surface partially immersed in the said tank (2).
  5. Device according to Claim 4, characterized in that the said element consists of a rotating roller (8).
  6. Device according to either of Claims 4 and 5, characterized in that the moving element moves in the same direction as the transfer roller (4).
  7. Device according to one of Claims 4 to 6, characterized in that the speed of movement of the moving element is from 5 to 15% of the run speed of the metal strip (7).
EP97402397A 1996-11-13 1997-10-13 Process for continuously coating a metallurgical product in continuous motion with an organic coating and apparatus therefor Expired - Lifetime EP0842709B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9613772A FR2755702B1 (en) 1996-11-13 1996-11-13 PROCESS FOR THE CONTINUOUS APPLICATION OF AN ORGANIC COATING ON A RUNNING METALLURGICAL PRODUCT AND DEVICE FOR ITS IMPLEMENTATION
FR9613772 1996-11-13

Publications (2)

Publication Number Publication Date
EP0842709A1 EP0842709A1 (en) 1998-05-20
EP0842709B1 true EP0842709B1 (en) 2002-03-27

Family

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Application Number Title Priority Date Filing Date
EP97402397A Expired - Lifetime EP0842709B1 (en) 1996-11-13 1997-10-13 Process for continuously coating a metallurgical product in continuous motion with an organic coating and apparatus therefor

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US (1) US5935658A (en)
EP (1) EP0842709B1 (en)
JP (1) JPH10137651A (en)
AT (1) ATE214973T1 (en)
CA (1) CA2221124A1 (en)
DE (1) DE69711328T2 (en)
ES (1) ES2171861T3 (en)
FR (1) FR2755702B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR0016114B1 (en) * 1999-12-03 2008-11-18 Method and apparatus for coating a moving substrate surface.
WO2012019777A1 (en) * 2010-08-12 2012-02-16 Tata Steel Uk Limited Method for applying a paint system on a moving steel strip to form a coating, and steel strip thus produced
CN108993821A (en) * 2018-09-29 2018-12-14 宁波瑞成包装材料有限公司 Multifunctional film production line pre-coating device
CN111889297A (en) * 2020-07-13 2020-11-06 张家港骏马无纺布有限公司 Non-woven fabric coating machine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2221780A (en) * 1939-03-10 1940-11-19 Collins & Aikman Corp Vat dyeing and apparatus therefor
GB1404616A (en) * 1972-11-27 1975-09-03 Wiggins Teape Research Dev Ltd Apparatus for applying a coating to a web of material
FR2341199A1 (en) * 1976-02-11 1977-09-09 Commissariat Energie Atomique METHOD AND DEVICE FOR TRAINING AND DEPOSITION ON A SUBSTRATE OF MONOMOLECULAR LAYERS OF AMPHIPHILIC MOLECULES
US4158333A (en) * 1978-05-01 1979-06-19 Anpa Research Institute Inking baffle for rotary newspaper presses
FR2477900A1 (en) * 1980-03-14 1981-09-18 Heurtey Metallurgie METHOD AND DEVICE FOR SEPARATING GASEOUS ATMOSPHERES IN ATMOSPHERE HEAT TREATMENT PLANTS
US4349587A (en) * 1981-03-12 1982-09-14 Bell Telephone Laboratories, Incorporated Method for coating fiber waveguides
JPH01156494A (en) * 1987-12-15 1989-06-20 Nippon Mining Co Ltd Method and device for electroplating
DE4291486T1 (en) * 1991-05-23 1996-03-07 Nippon Paint Co Ltd Device for measuring the concentration of non-volatile components
JPH0797669A (en) * 1993-09-30 1995-04-11 Sumitomo Metal Ind Ltd Method and apparatus for producing hot dip metal coated steel sheet

Also Published As

Publication number Publication date
ATE214973T1 (en) 2002-04-15
EP0842709A1 (en) 1998-05-20
CA2221124A1 (en) 1998-05-13
DE69711328D1 (en) 2002-05-02
FR2755702B1 (en) 1998-12-11
DE69711328T2 (en) 2002-09-19
FR2755702A1 (en) 1998-05-15
ES2171861T3 (en) 2002-09-16
JPH10137651A (en) 1998-05-26
US5935658A (en) 1999-08-10

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