EP0003790B1 - Dispositif pour enduire une feuille en mouvement - Google Patents

Dispositif pour enduire une feuille en mouvement Download PDF

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Publication number
EP0003790B1
EP0003790B1 EP79100404A EP79100404A EP0003790B1 EP 0003790 B1 EP0003790 B1 EP 0003790B1 EP 79100404 A EP79100404 A EP 79100404A EP 79100404 A EP79100404 A EP 79100404A EP 0003790 B1 EP0003790 B1 EP 0003790B1
Authority
EP
European Patent Office
Prior art keywords
web
coating
pressure
roller
coating roller
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
Application number
EP79100404A
Other languages
German (de)
English (en)
Other versions
EP0003790A1 (fr
Inventor
David John Pipkin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0003790A1 publication Critical patent/EP0003790A1/fr
Application granted granted Critical
Publication of EP0003790B1 publication Critical patent/EP0003790B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • 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
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/02—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to surfaces by single means not covered by groups B05C1/00 - B05C7/00, whether or not also using other means
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work

Definitions

  • squeegees can be used to apply and control the coating on the base.
  • Rolls can also be used to apply coatings, either a single roll which is passed through a storage container with the coating liquid and applies the liquid directly to the support or a combination, for example by the support for controlling the coating through the gap between adjacent rolls to be led.
  • Coatings can also be directly extruded onto substrates in very thin layers.
  • the pads can be dipped into a reservoir of coating liquid, either by moving freely as a web or by being passed around a roller, and air cushions or elastic wipers can be used to remove the excess coating material from the pad.
  • US-A-3 688 738 describes a coating device in which a support in the form of a web is passed around a roller which is immersed in the coating liquid.
  • a wiper membrane which does not extend beyond the roll, is used to remove excess coating liquid from the backing and return it to the reservoir.
  • a statically arranged film is additionally used, which interacts with the stripping membrane.
  • it is generally not desirable to coat the pad to the brim. Excess coating material loosens from the edge of the underlay when it is transported on. It is also often desirable to leave an uncoated edge. Therefore, the simple device described in US-A-3,688,738 is limited to the manufacture of a certain type of coating and a certain manufacturing speed.
  • a device for applying a coating composition to strip-shaped materials in which a coating composition is applied to a material web guided on a roller with a coating ruler provided with a rubber-elastic covering.
  • the pressure that the coating ruler exerts on the material web to be coated can be changed by means of an adjusting screw.
  • the object of the invention is to provide a device for coating a base with which a certain amount of coating liquid can be applied to a web in a desired layer thickness and width while maintaining a very smooth, uniform coating.
  • the coating width should be strictly limited to a desired width on the web to be coated.
  • the layer thickness should be able to be easily controlled and changed by more precisely adjusting the pressure exerted on the coating roller.
  • a return of excess coating material to the storage container should be avoided, and the device should preferably be able to be used in a continuous process. Furthermore, with the device according to the invention, materials with large differences in viscosity up to thixotropic materials in any layer thicknesses, which may be thinner than those obtainable with conventional processes and should be applicable at high coating speeds.
  • the object of the invention is achieved by a device of the type mentioned at the outset, which is characterized in that a second device is provided with which the pressure exerted by the first device can be additionally influenced and that the metered application of the liquid by the metering device in Depends on the speed of the web.
  • FIG. 1 A coating device according to the present invention is shown in FIG. 1 and is generally designated by the reference number 10.
  • the web 12 rests on the coating roll 14, which is rotatably arranged on an axis 15 and is driven at a certain speed.
  • the guide roller 18 brings the web 12 into contact with a substantial part of the surface of the coating roller 14.
  • Rollers 14 and 18 are conventional rolls that are common in processes for coating various substrates.
  • the web 12 consists in most cases of a conventional substrate, for example of biaxially oriented polyethylene terephthalate, which is available under the trademark Mylar, of acetates or polyolefins or other conventional polymer films, paper and the like.
  • the smoothing film 20 is positioned substantially statically adjacent to part of the web 12 and extends over the periphery of the coating roll 14. Preferably, the smoothing film 20 extends over a large part of the web 12 as long as it is in contact with the coating roll 14, but not very much beyond this contact area.
  • a pressure-exerting device for example a deformable membrane 22, which is arranged on a core 23 and is fastened to a carrier 24, brings the smoothing film 20 with the web 12 under a certain pressure, which is a function of the internal pressure of the membrane 22, in contact.
  • the carrier 24 allows the membrane 22 to move towards or away from the roller 14 in order to change the contact area with the same.
  • the line 26 is in communication with the interior of the membrane 22 and also with a pressure regulating device 28 through which a medium, preferably air, is fed into the interior of the membrane 22.
  • a medium preferably air
  • the metering pump 32 conveys liquid coating material from the feed line 34 to the metering line 36 at a certain speed so that there is a supply of liquid coating material at the point of contact of the web 12 with the smoothing film 20.
  • the metering pump 32 is driven by the belt 38, which is arranged on the pulley 39 of the metering pump 32 on the one hand and the pulley 40 of the guide roller 18 on the other hand.
  • the desired amount of liquid coating material is thus fed in depending on the speed of the guide roller 18.
  • the metering pump 32 can also be driven at a constant speed by an independent device (not shown).
  • a number of outlet openings 36 may be provided in the transverse direction above the surface of the web 12, whereby a plurality of coated strips can be produced on the web 12, which can later be divided into individual coated sections.
  • the supply amount 37 is controlled in such a way that spreading of the liquid coating material to the edge of the web is avoided, which facilitates working at high speed and edges of the desired width on the edge of the coating roller 14 are kept free of excess coating material.
  • Thixotropic liquid coating materials can easily be kept in a flowable state by the shear forces exerted by the material of the metering pump 32 and the web 12 at the storage location 37.
  • FIG. 2 Another embodiment of the invention is shown in FIG. 2. As shown, the pressure generating device in the form of a membrane 22 is attached to the end of a cylindrical core 23 '. As can also be seen from FIG. 2, an extrusion nozzle 45 is used instead of the metering line 36 in FIG. 1. The outlet opening 46 of the extrusion die 45 is arranged so that the liquid coating material is applied to the web 12 in such a way that it is not exposed to the air even for a short time. Although this is shown at an increased distance for clarity, the web 12 to the extrusion die 45 is arranged so that the contact point with the web 12 is effectively isolated from the external environment.
  • the liquid coating material is soft through the outlet opening 46 is extruded, contained between the web 12 and the surface of the extrusion die 45.
  • the smoothing film 20 is attached to the notch 47 of the extrusion die 45 and serves to act on the liquid coating material in the manner described in FIG. 1 without, however, exposing the coating material to the air before the coating process is completed.
  • FIG. 3 Another embodiment of the coating device according to the invention is shown in FIG. 3 and is designated by the reference symbol 10 '.
  • Coating device 10 ' is similar to the devices of Figures 1 and 2, except that the pressure is generated in a different manner.
  • a pressure web 48 is arranged essentially statically on the guide rollers 50 and 51 in such a way that it is in contact with the web 12 over part of the surface of the coating roller 14.
  • the pressure web 48 terminates at the tension roller 53 and is attached thereto in such a way that a torque which is exerted on the tension roller 53 increases the tension in the pressure web 48 and consequently also the pressure with which the pressure web 48 presses against the coating roller 14 is pressed.
  • An arrangement for changing the torque that is exerted on the tensioning roller 53 for example a fixedly arranged torque generator 55, is provided in order to facilitate the setting of a specific tension of the pressure path 48.
  • the print web 48 can be made from a number of thin, flexible materials, such as polyester such as polyethylene terephthalate, rubber or other polymer films, metals, or even paper.
  • the smoothing film 20 is statically disposed between the printing web 48 and the web 12 such that it contacts a portion of the web 12 that is in contact with the coating roll 14; however, it can also extend beyond the point of contact with the coating roller 14. As shown, the smoothing film 20 is attached to the guide roller 50 for the printing web, but there are other attachment options. If an extrusion die 45 is not used, as shown in FIG. 2, the web 12 generally contacts the coating roll 14 prior to its point of contact with the smoothing film 20. This is necessary for the liquid coating material to dose through the metering line 36 into place where the web 12 and the smoothing film 20 meet. As previously indicated, the coating materials are carefully metered through metering line 36.
  • the metering pump 32 is preferably operated in synchronism with the speed of the web 12, so that an increase in the linear speed of the web 12 is also associated with an increase in the metering capacity of the pump 32.
  • simplified metering devices for example a storage container with coating material, which exerts pressure on an easily adjustable valve, can also be used.
  • Other arrangements for the supply of the coating material are also possible, for example an extrusion nozzle or a distributor (not shown) with many outlet openings, which ensures a more uniform distribution of the coating material in the transverse direction over the web 12 and either a completely coated one or in the form of strips coated web supplies.
  • the material to be applied can be applied directly to the smoothing film 20 in the vicinity of the point where it contacts the web 12. be applied.
  • the coating material is dosed in the amounts actually required so that no coating material has to be returned. This completely avoids problems with the return of the coating material, for example coagulation, contamination, influences from the atmosphere and the like.
  • the web 12 is pressed in a high-pressure region against the coating roller 14 by the pressure which is exerted on the smoothing film 20 by the membrane 20 or the pressure web 48.
  • the pressure of the membrane 22 or the tension in the pressure web 48 and consequently the force with which the smoothing film 20 is pressed against the web 12 the thickness of the coating material that passes through this area can be easily adjusted.
  • the width of the coating is controlled at the same time by a fixed metering speed of the coating material. With an increased metering speed of the coating material, the width of the coating is simultaneously increased; and by changing the pressure of the membrane 20 or the tension of the web 48, the thickness can be easily adjusted.
  • these parameters can be easily monitored by controlling the delivery rate of the metering pump 32 or by the pressure generated by the device 28 or the torque exerted on the tensioning pulley 53 by the fixed torque producing motor 55 , be adjusted.
  • the motor 55 is operated so that it comes to a standstill when the desired train in the band 48 is reached.
  • the coating device advantageously controls the thickness and width of a coating on a moving web in a large area allowed.
  • This result is obtained without the use of precisely manufactured metal edges or nozzles for layer thickness control, for example a doctor blade or an extrusion nozzle.
  • the coating liquid in the present invention does not have to be returned to a reservoir which would cause contamination, coagulation and the like, and that in most cases it will not touch any metallic parts. If desired, atmospheric influences on the coating liquid can be eliminated.
  • the smoothing film can easily be replaced. It is the only component of the coating apparatus that comes into contact with the coating material. Without having to rely on a precisely manufactured part that is subject to wear and tear, the coating process can be monitored according to the invention in a simple and economical manner by means of a carefully adjusted high-pressure area.

Landscapes

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

Claims (10)

1. Dispositif pour revêtir d'un fluide une bande de matériau mobile (12), comportant:
a) un galet de revêtement (14) monté à rotation sur un axe (15),
b) d'un premier élément (22, 48) permettant d'excercer une pression sur une partie de la surface dudit galet de revêtement (14),
c) une plaque lisseudr (20) disposée entre d'une part le galet de revêtement (14) et d'autre part le premier élément (22, 48) pour exercer ladite pression, et
d) une pièce (32/36, 45) pour doser la quantité de liquide à appliquer dans une région située, si l'on considère le sens du mouvement de ladite bande de matériau (12), en amont du point de contact de la plaque lisseuse (20) avec ladite bande de matériau (12),

caractérisé en ce qu'un second élément (28, 55) est prévu qui permet de modifier encore ladite pression exercée par le premier élément (22,48), et en ce que la quantité choisie du liquide est appliquée au moyen du dispositif de dosage (32/36, 45) sans que la vitesse de la bande de matériau (12) soit prise en compte.
2. Dispositif selon la revendication 1, caractérisé en ce que ledit premier élément pour exercer ladite pression est une membrane flexible en boucle fermée (22) contournant un noyau (33) et solidaire un d'support (24), lequel permet, selon un mouvement d'éloignement ou de rapprochement dudit galet de revêtement (14), de modifier ladite surface de contact de ladite membrane (22) sur le ledit galet de revêtement (14).
3. Dispositif selon la revendication 2, caractérisé en ce que l'effort de pression supporté par la membrane (22) est produit par un milieu gazeux et contrôlé par un manomètre (28).
4. Dispositif selon la revendication 1, caractérisé en ce que le premier élément pour exercer ladite pression est une bande contrainte (48) et en ce que ladite pression est contrôlée en mesurant la tension subie par ladite bande (48).
5. Dispositif selon la revendication 4, caractérisé en ce que ladite bande contrainte (48) est montée de façon statique sur des galets de guidage (50 et 51) de telle sorte qu'elle défile sur une partie de la surface dudit galet de revêtement (14) et qu'elle est en contact, pour la surface considérée, avec la bande à revêtit (12), et en ce que les extrémités de ladite bande contrainte (48) sont fixées à un galet tendeur (53).
6. Dispositif selon la revendication 5, caractérisé en ce qu'un couple, généré par un moteur (55), est appliqué audit galet tendeur (53), lequel moteur est entraîné de telle sorte qu'il est .,mobilisé lorsqu'une valeur souhaitée de l'effort de tension subi par ladite bande contrainte (48) est atteinte.
7. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de dosage du liquide à appliquer est une filière d'extrusion (45) comportant une ouverture (46), ou bien un distributeur comportant plusieurs ouvertures, dont la surface avoisinant ladite ouverture (46) est en contact avec ladite bande à revêtit (12).
8. Dispositif selon la revendication 1, caractérisé en ce que ladite plaque lisseuse (20), constituée d'un matériau flexible, s'étend au-delà de la fin de sa surface de contact avec ledit galet de revêtement (14).
9. Dispositif selon la revendication 8, caractérisé en ce que ladite plaque lisseuse (20) est respectivement rattachée à ladite membrane (22) et à ladite filière d'extrusion (45).
10. Dispositif selon la revendication 1, caractérisé en ce qu'il est prévu en plus un galet (18) pour guider ladite bande à revêtit (12), dont l'axe (40) est parallèle à l'axe (15) du galet de revêtement (14), et en ce que ledit galet de guidage (18) est monté de telle sorte que le point de contact de la tangente audit galet (18), au galet de revêtement (14) et à la plaque lisseuse (20) avec le galet de revêtement (14), et la plaque lisseuse (20) définit la région (37) d'orifice du canal (36) dudit dispositif de dosage.
EP79100404A 1978-02-23 1979-02-12 Dispositif pour enduire une feuille en mouvement Expired EP0003790B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88228178A 1978-02-23 1978-02-23
US882281 1978-02-23

Publications (2)

Publication Number Publication Date
EP0003790A1 EP0003790A1 (fr) 1979-09-05
EP0003790B1 true EP0003790B1 (fr) 1983-09-07

Family

ID=25380260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100404A Expired EP0003790B1 (fr) 1978-02-23 1979-02-12 Dispositif pour enduire une feuille en mouvement

Country Status (5)

Country Link
US (1) US4327130A (fr)
EP (1) EP0003790B1 (fr)
JP (1) JPS54114546A (fr)
AT (1) AT359174B (fr)
DE (1) DE2966123D1 (fr)

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JP4953182B2 (ja) 2001-08-27 2012-06-13 大王製紙株式会社 Ｓａｐ分散スラリーのコーティング装置およびシート状吸収体の製造方法
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022948A1 (de) * 1990-07-19 1992-01-23 Anlagen Und Maschinenbau Karl Vorrichtung zum auftragen eines behandlungsgutes auf eine warenbahn
AU2004203164B2 (en) * 2003-07-18 2009-09-24 Dominic Victor Costa Adhesive Applicator

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ATA99179A (de) 1980-03-15
US4327130A (en) 1982-04-27
JPS54114546A (en) 1979-09-06
JPS5515265B2 (fr) 1980-04-22
EP0003790A1 (fr) 1979-09-05
AT359174B (de) 1980-10-27
DE2966123D1 (en) 1983-10-13

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