EP2070600B1 - Procédé de revêtement d'une bande en mouvement de papier, de carton ou d'une autre matière fibreuse à l'aide d'un revêtement de rideau - Google Patents

Procédé de revêtement d'une bande en mouvement de papier, de carton ou d'une autre matière fibreuse à l'aide d'un revêtement de rideau Download PDF

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Publication number
EP2070600B1
EP2070600B1 EP08170659A EP08170659A EP2070600B1 EP 2070600 B1 EP2070600 B1 EP 2070600B1 EP 08170659 A EP08170659 A EP 08170659A EP 08170659 A EP08170659 A EP 08170659A EP 2070600 B1 EP2070600 B1 EP 2070600B1
Authority
EP
European Patent Office
Prior art keywords
application
curtain
guide plate
medium
heads
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.)
Not-in-force
Application number
EP08170659A
Other languages
German (de)
English (en)
Other versions
EP2070600A2 (fr
EP2070600A3 (fr
Inventor
Takeo Nakazawa
Katsumi Ishizuka
Toshihiro Katano
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2070600A2 publication Critical patent/EP2070600A2/fr
Publication of EP2070600A3 publication Critical patent/EP2070600A3/fr
Application granted granted Critical
Publication of EP2070600B1 publication Critical patent/EP2070600B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • B05C5/008—Slide-hopper curtain coaters

Definitions

  • the present invention relates to a method for coating a running paper, cardboard or other fibrous web by means of curtain coating, in which from at least two arranged above the fibrous web applicator heads directed down application medium in the form of medium curtains is delivered in order on one, a reach inclined plane forming guide plate on which the application media superimposed flow down and get from a downwardly directed curtain guide at the bottom of a two- or multi-layerschreibmediums- curtain on the surface of the fibrous web.
  • Coated paper such as printing paper, pressure-sensitive paper, thermal paper, catalogs, etc.
  • Coated paper is prepared by passing a pre-dried moving web through a coater and then finish drying.
  • Coating machines are conventionally in the form of blade coaters which work with a doctor blade element, such as a blade or doctor blade or an air knife, and which use the method of replenishment. That is, it is here applied to the web application medium in abundance and brought to the required coating weight, which scraped by means of doctor blade, the excess application medium or blown away by means of the air knife.
  • the disadvantages are such that, due to the fluid pressure when the application medium is applied to the web and also due to the pressure force of the doctor blade, a large amount of application medium penetrates into the web and the maintenance costs are high due to the wear of the doctor blade, rod or the like.
  • the superfluous Scrapped medium dissipated, including additional effort is necessary.
  • curtain coaters have frequently been used to coat the surface of a web of material, i. a paper carton or other fibrous web used.
  • a curtain applicator coating is done "contactless" and only in the amount in which the application medium is to remain on the fibrous web. This means that no additional dosage takes place.
  • the curtain coating is carried out in such a way that the relevant application medium is delivered to the moving web by an application head arranged above the web.
  • the at least web-width application head has at least one application medium chamber and at least one likewise web-wide nozzle for dispensing the application medium in the form of a curtain layer.
  • the delivered curtain layer then deposits on the surface of the web as a coating layer.
  • curtain coaters that form multiple layers using two or more guns.
  • FIG. 3 This prior art is shown in a partial sectional drawing of a curtain coater for two layers.
  • the curtain coater for two layers of the invention has two curtain heads 1a and 1b, which deliver the flowing through the inside of the slots da and db application medium ta and tb directed downward.
  • the curtain coater on a guide plate B with an inclined plane Ba receives from the said two curtain heads 1a and 1b respectively successively discharged application medium ta and tb, which flows down on this inclined plane in succession überchrolases and from the downwardly directed curtain guide part Bb at the lower edge portion of this inclined plane Ba as medium curtain ca, cb is dropped onto the surface of the material or fibrous web w.
  • the two coating layers sa (lower layer) and sb (upper layer) are formed on the surface of the moving fibrous web w.
  • the arrow shows the direction of movement of the web w.
  • Fig. 4 shows explanatory figures of the disclosed in said known patent document method.
  • 1a, 1b and 1c are applicator heads and ca
  • cb and cc are the curtains emitted by the respective applicator heads.
  • 2a, 2b and 2c are the catch basin and B is the guide plate.
  • Bb represents a curtain guide and w is the material web.
  • 3 is the application medium catch basin for the mixed application medium coming from the curtain guide Bb.
  • FIG. 4a shows how the medium curtain ca from the applicator head 1a, the medium curtain cb from the applicator head 1b and the medium curtain cc from the applicator head 1c on the guide plate B are stacked in order and allowed to flow from the curtain guide Bb as a three-layered medium curtain on the surface of the fibrous web w and so is deleted. In this case, it does not happen that the color curtains ca, cb and cc are received and circulated by the paint collecting tanks 2a, 2b and 2c.
  • FIG. 4b shows how the medium curtain CA from the application head 1a and the medium curtain cc from the application head 1c on the guide plate B of Row after layer and flowed by the curtain guide Bb as a two-layer medium curtain on the surface of the web w and is painted so.
  • the applicator head 1b is placed in the standby position, the medium curtain cb is received by the catch basin 2b and runs around or in place of the application medium warm water runs around.
  • the Figure 4c shows how the medium curtain cb from the applicator head 1b and the medium curtain cc from the applicator head 1c on the guide plate B are stacked in sequence and flowed by the curtain guide Bb as a two-layered medium curtain on the surface of the web w and painted so.
  • the applicator head 1a is placed in the ready position, the medium curtain ca is received by the catch basin 2a and runs around or in place of the application medium warm water runs around.
  • FIG. 4d shows how the medium curtain CA from the applicator head 1a and the medium curtain cb from the applicator head 1b on the guide plate B are stacked in order and flowed from the curtain guide Bb as a two-layered medium curtain on the surface of the web w and painted so.
  • the applicator head 1c is set in the standby position, the medium curtain cc is received by the paint collecting basin 2c and circulates, or warm water flows in place of the application medium.
  • the application heads 1a, 1b and 1c are in the standby position, the curtains ca, cb and cc discharged therefrom are received and run by the catch basins 2a, 2b and 2c around.
  • the distance from the gun to the guide plate B is significant. In Fig. 5 this is shown. Also, due to the specific properties of the application media, if the distance s from the applicator head to the guide plate B is inappropriate, the flow amount is small and the thickness of the medium curtain c is thin, it happens that the medium curtain c is torn by the surface tension during its fall by its own weight in the width direction, and the flux takes a split shape.
  • the invention has for its object to provide a method for operating a curtain coater for multi-layer order, in which the disadvantages of the prior art do not occur.
  • the respective applicator heads used are regulated in their position in the direction of movement of the web, wherein Beginning of the coating operation stand by the respective application heads in front of the guide plate and submit application medium, and below the respective application heads each a coating medium catch basin is ready, which receives the respective application medium from the respective application head and collects. There is a common mixing catch basin under these individual catch basins.
  • the respective application heads are moved horizontally until their lower edge approaches the inclined plane of the guide plate. Meanwhile, the lower gun header is also moved to approach the sump for the nearest upper gun. As the lower collection head passes over the lower gun header, the transfer medium dispensed from the lower gun is guided by the guide plate so that it does not flow into the catch tray for the next upper gun. Only when the curtains delivered by the respective guns are stable, the mixing catch basin is withdrawn forward and the normal sweeping operation is underway.
  • the rear edge of the mixing catch basin is positioned further back, that is to say positioned further in the upstream direction, than a lower edge of the guide plate. This one comes out with relatively little space.
  • the distance between the lower edge of the respective applicator heads and the inclined plane of the guide plate is 0.1-100 mm.
  • FIG. 12 shows the state in which both existing guns, ie, the upper-flow-side gun (in the upstream position) and the lower-gun gun (in the downstream position) are in standby and discharge the application medium, respectively.
  • Fig. 2 (b) shows the operating state in which the order in the upstream and downstream direction with respect to the direction of the fibrous web arranged applicator heads are positioned over a guide plate.
  • Figs. 1 (b) and 1 (c) such as Fig. 2 (a) each show the state during the movement of the guns, according to the previous figure, from a standby position to an operating position.
  • the medium curtain discharged from the application head of the upper flow side 1a and cb is the medium curtain discharged from the application head of the lower flow side 1b.
  • a catch basin 2a for the applicator head 1a and another catch basin 2b for the applicator head 1b are also recognizable.
  • a guide plate is designated, which is arranged at the catch basin 2b for the applicator head 1b in the downstream position (seen in the direction of movement L of Faserstoffbah w).
  • This guide plate 2c forms an inclined plane for the flowing down therefrom Application medium from the applicator head 1b in the interior of the catch basin 2b.
  • the guide plate B which receives the medium curtains (curtains of, for example, coating color) ca and cb discharged from the respective applicator heads 1a and 1b in turn on their inclined plane Ba, flows down along the inclined plane Ba, and from a downwardly directed curtain guide Bb the guide plate B or from its lower edge as a two-layer medium curtain ca, cb flow onto the surface of the fibrous web w.
  • medium curtains curtains of, for example, coating color
  • the applicator head 1a, the applicator head 1b, and the applicator cup 2b move horizontally toward the back of the guide plate B (in the upstream direction).
  • the medium curtain cb is further received by the catch basin 2b and circulated by means of a pump, not shown in the figure.
  • the medium curtain ca is received by the mixing catch basin 3. Since the mixed application medium usually can not be recycled and reused, it is eliminated. Further, holders for the applicator head 1a, for the applicator head 1b and for the catch basin 2b on both sides of the curtain coater are provided horizontally along the curtain coater and can be moved on rails which are also not drawn in the figure.
  • the applicator head 1a and the applicator head 1b even further moved in the direction of the guide plate B to the rear horizontally.
  • the medium curtain cb flows down on the guide plate 2c, flows along its inclined plane, and flows into the interior of the catch basin 2b.
  • the medium curtain ca is received by the mixing catch basin 3.
  • the applicator head 1a and the applicator head 1b further moved horizontally in the direction of the guide plate B to the rear.
  • the application head 1a is now located above the front edge of the guide plate B, wherein the medium curtain ca first flows down onto the guide plate B and thereby flows along the slated plane and then falls from the curtain guide Bb down into the mixing catch basin 3.
  • the medium curtain cb moves away from the space above the guide plate 2c and is caught by the mixing catch basin 3.
  • the applicator head 1a and the applicator head 1b are moved further backward, ie moved horizontally in the upward direction with respect to the running direction of the fibrous web w, so that the lower edges of the upstream applicator head 1a and that of the downstream applicator head 1b become the inclined plane Ba approximate the guide plate B and thus reach the desired operating position.
  • the mixing catch basin 3 is pulled back forward (that is, in the downstream direction).
  • the two-layer medium curtain ca, cb is then allowed to flow onto the surface of the fibrous web w.
  • the present invention is not limited to the embodiment described above, and various changes are possible.
  • the direction of movement of the web w in the Fig. 1 or Fig. 2 be shown opposite direction.
  • the explanation was made so that the sump 2a is fixed to the application head 1a, but it may be horizontally movable.
  • a further application head can be provided, which is attached even further upstream than the already existing upstream head 1 a, so that then three application layers are formed.

Landscapes

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

Claims (4)

  1. Procédé de conduite d'une machine de revêtement en rideau pour le dépôt multicouche sur une bande de papier, de carton ou d'une autre matière fibreuse en défilement, dans lequel, lors du revêtement en rideau à partir d'au moins deux têtes de dépôt (1a, 1b) disposées au-dessus de la bande de matière fibreuse (w), on délivre des rideaux de fluide de revêtement dirigés vers le bas, qui arrivent dans l'ordre sur une plaque de guidage formant un plan oblique (Ba), sur laquelle les fluides de revêtement s'écoulent vers le bas en étant superposés et, à partir d'un guide de rideau (Bb) dirigé vers le bas de la plaque de guidage (B), arrivent sur la surface de la bande de matière fibreuse (w) sous la forme d'un rideau de fluide de revêtement multicouche, caractérisé en ce que l'on fait varier la position des têtes de dépôt respectives (1a, 1b) de telle manière que, avant le commencement de l'opération de revêtement, les têtes de dépôt respectives soient prêtes à fonctionner avant la plaque de guidage (B) et délivrent respectivement un fluide de revêtement, qui est reçu et collecté respectivement par des bassins de réception individuels (2a; 2b) associés aux têtes de dépôt (1a, 1b), et il se trouve aussi un bassin de réception à mélange commun (3); dans lequel, à l'état prêt à fonctionner et avant le commencement de la conduite de l'opération de revêtement, on déplace horizontalement les têtes de dépôt respectives (1a, 1b) jusqu'à ce que leur bord inférieur s'approche de la plaque de guidage (B), pendant que le bassin de réception (2b) est d'abord également déplacé de telle manière qu'il s'approche du bassin de réception (2a) destiné à la tête de dépôt (la) disposée le plus près en amont et pendant que la tête de dépôt aval (1b) se trouve au-dessus du bassin de réception (2b), on guide au moyen d'une plaque de guidage (2c) le fluide de revêtement délivré par la tête de dépôt aval (1b) de telle manière qu'il ne s'écoule pas dans le bassin de réception (2a) destiné à la tête de dépôt (1a) située le plus près en amont; et en ce que, lorsque les rideaux délivrés par les têtes de dépôt respectives (1a, 1b) sont stables, on déplace les têtes de dépôt (1a, 1b) en direction horizontale plus loin vers l'amont jusqu'à ce qu'elles aient atteint leur position de fonctionnement ou de dépôt, et on retire en l'occurrence le bassin de réception à mélange (3) vers l'avant, c'est-à-dire qu'on le déplace en direction de l'aval, de telle manière que le rideau multicouche délivré à partir de la plaque de guidage (B) parvienne ensuite sur la bande de matière fibreuse (w).
  2. Procédé selon la revendication 1, caractérisé en ce que l'on déplace le bassin de réception à mélange (3) pour la position de disponibilité de telle manière que son bord postérieur soit placé plus loin en direction de l'amont qu'un bord inférieur (Bb) de la plaque de guidage (B).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, pendant l'opération de revêtement, la distance entre le bord inférieur des têtes de dépôt respectives (1a, 1b) et le plan oblique (Ba) de la plaque de guidage (B) vaut environ 0,1 à 100 mm.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que, lors du revêtement en rideau (phase de fonctionnement), les bassins de réception individuels (2a, 2b) occupent une position située au-dessus du bassin de réception à mélange (3).
EP08170659A 2007-12-05 2008-12-04 Procédé de revêtement d'une bande en mouvement de papier, de carton ou d'une autre matière fibreuse à l'aide d'un revêtement de rideau Not-in-force EP2070600B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007314894A JP5076215B2 (ja) 2007-12-05 2007-12-05 カーテンコータの運転方法

Publications (3)

Publication Number Publication Date
EP2070600A2 EP2070600A2 (fr) 2009-06-17
EP2070600A3 EP2070600A3 (fr) 2010-03-24
EP2070600B1 true EP2070600B1 (fr) 2011-05-25

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Application Number Title Priority Date Filing Date
EP08170659A Not-in-force EP2070600B1 (fr) 2007-12-05 2008-12-04 Procédé de revêtement d'une bande en mouvement de papier, de carton ou d'une autre matière fibreuse à l'aide d'un revêtement de rideau

Country Status (3)

Country Link
EP (1) EP2070600B1 (fr)
JP (1) JP5076215B2 (fr)
AT (1) ATE510630T1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007029646A1 (de) * 2007-06-26 2009-01-08 Voith Patent Gmbh Auftragsverfahren sowie Vorhangauftragswerk

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3903570B2 (ja) * 1998-01-20 2007-04-11 石川島播磨重工業株式会社 塗工方法及び装置
DE10359122A1 (de) * 2003-12-17 2005-07-14 Voith Paper Patent Gmbh Auftragsvorrichtung
DE10359117A1 (de) * 2003-12-17 2005-07-28 Voith Paper Patent Gmbh Vorhangauftragswerk
JP4746894B2 (ja) * 2005-03-14 2011-08-10 ボイス ペ−パ− パテント ゲ−エムベ−ハ− 塗工装置

Also Published As

Publication number Publication date
JP5076215B2 (ja) 2012-11-21
EP2070600A2 (fr) 2009-06-17
JP2009136753A (ja) 2009-06-25
EP2070600A3 (fr) 2010-03-24
ATE510630T1 (de) 2011-06-15

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