EP2396121A1 - Dispositif d'enduction au rideau - Google Patents

Dispositif d'enduction au rideau

Info

Publication number
EP2396121A1
EP2396121A1 EP10702309A EP10702309A EP2396121A1 EP 2396121 A1 EP2396121 A1 EP 2396121A1 EP 10702309 A EP10702309 A EP 10702309A EP 10702309 A EP10702309 A EP 10702309A EP 2396121 A1 EP2396121 A1 EP 2396121A1
Authority
EP
European Patent Office
Prior art keywords
curtain
holder
fibrous web
applicator
curtain holder
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.)
Withdrawn
Application number
EP10702309A
Other languages
German (de)
English (en)
Inventor
Bernd-Uwe Stellner
Manfred Ueberschär
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 EP2396121A1 publication Critical patent/EP2396121A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B05C5/005—Curtain coaters

Definitions

  • the invention relates to a curtain applicator for coating a running paper, cardboard or other fibrous web, comprising a disposed above the fibrous web and at least the width of the fibrous web corresponding curtain applicator for dispensing at least one liquid to pasty application medium in the form of a on or multilayer curtain, which falls substantially to gravity following the fibrous web, wherein for guiding the curtain across its fall path away, ie between a tear-off edge of the applicator head and the surface of the below the applicator head in the longitudinal direction moving fibrous web at least one side edge of the curtain, a curtain holder is provided, further comprising a coating medium gutter and a Lucasgrenz für Schweizerfernungsurban.
  • a generic curtain applicator is known from DE-A1 102 32 949. It was proposed that the curtain delivered by the curtain applicator be stabilized or guided by means of curtain holders.
  • curtain applicators both a single coating layer and at the same time several layers are deliverable.
  • An embodiment of a curtain applicator which also has curtain holder (here referred to as edge strip) is described and illustrated inter alia in the post-published DE 10 2008 040 409.
  • This embodiment according to the figure 1 is referred to in professional circles as "Slide Die”, ie Gleit Anlagendüse.
  • This so-called sliding layer nozzle contains at least two application medium chambers from which the medium in each case reaches a sliding surface of the sliding layer nozzle via a supply gap, which in turn merges in each case into a slot-shaped outlet nozzle.
  • the application medium emerging from the discharge nozzles arranged in parallel one behind the other overlaps one another.
  • this multi-layer dissolves and falls down as a multilayer curtain either initially on an intermediate guide plate or directly on the substrate to be coated or the surface of the moving fibrous web.
  • the edge strips are adjustable in the width direction of the curtain, ie in the transverse direction of the commissioned work.
  • other embodiments of applicator heads are known in which a slot die for producing a single-layer application or multiple slot dies for delivering a multiple layer down toward the underlying fibrous web.
  • the tear-off edge is formed by one of the slot die lips or, in a variant, by the end of a sliding face arranged between dispensing nozzle and counter surface or fibrous web.
  • curtain holders are provided which are movable in the machine direction (longitudinal direction).
  • the coating width can be equal to or less than the width of the fibrous web, which is referred to as "inboard” -Fahrweise.
  • the curtain width is greater than the width of the fibrous web.
  • curtain holders guide the curtain, which is approx. 200 mm long, close to the fibrous web.
  • the curtain holders known from the prior art are usually arranged in pairs. Here are a curtain holder on the so-called leader and a curtain holder on the so-called drive side of the coating machine. These curtain holders are each firmly and rigidly arranged on a component of the coating machine or a component, such as applicator head, collecting gutters or Heilgrenz fürentfernungs- device of the curtain applicator. This arrangement is indeed stable, but has the disadvantage that these modules can only ever be completely moved, which is very expensive. Moving the curtain holder is necessary, for example, when pulling in a new fibrous web.
  • the sheet-guiding or supporting rolls may "wrap up" so that the curtain holders, no matter what position they are in, interfere or be affected. This is also possible during cleaning or maintenance work.
  • a cleaning or maintenance device to push the curtain holder and thereby damage the curtain holder or the device itself.
  • the object of the invention is achieved with a curtain applicator with the characterizing features of claim 1.
  • the curtain holder is movably arranged on a component of the coating machine or the curtain applicator. This mobility ensures that the at least one curtain holder (preferably a curtain holder on the leader and on the drive side of the coater) is held in position during operation of the commissioned work, but it is still possible to leave its operating position and / or to take again.
  • the at least one curtain holder preferably a curtain holder on the leader and on the drive side of the coater
  • a random movement of the curtain holder can also occur during service or during cleaning of the commissioned work.
  • inadvertent contact e.g. also use a cleaning device to deflect the curtain holder without damaging it or the appliance.
  • persons who are directly on the coater or the curtain applicator are protected against pinching between the curtain holder and the web or curtain holder and roller, because as I said, a fast and safe deflection or movement of the curtain holder is possible ,
  • the curtain holder is also intentionally movable. This is especially the case when a new web is to be fed into the machine or a splice pass is expected. In this case, it is more advantageous if the curtain holder (s) are not in the operating position and are moved away only temporarily.
  • curtain holder for the coating operation is accurately positioned and ensures safe guiding of the coating medium curtain from the trailing edge to the counter surface out, but if necessary, also fast wegbewegbar.
  • said counterface is a paper, board or other fibrous web. But it can also be the surface of an applicator roll or an indirect application
  • a support frame (or also called staging) of the coating machine.
  • the movable assembly may conveniently consist of a simple suspension.
  • a further possibility of the said component for the movable arrangement may also consist in the use of an application medium collecting channel (so-called starting channel) or an existing air boundary layer removal device of the curtain applicator unit.
  • the curtain holder is connected for the purpose of rotational movement via a hinge or a hinge with one of the components described above. This can achieve a movement that is rectified with the web running direction.
  • a rotational movement can also be directed outwards, i. away from the machine center or in the transverse direction of the machine.
  • Another possibility of movement of the at least one curtain holder is also that it is translationally movable.
  • a straightforward method to the outside is possible.
  • a component for example, a sliding bush or a linear guide into consideration.
  • the curtain holder in addition to the purpose of format adjustment in the transverse or width direction of the curtain is movable.
  • the width of the curtain and thus of the applied media film are meant.
  • the curtain holder is able to swivel with the same movement and when swinging back he can set a different format.
  • the format setting is also possible by a separate additional movement.
  • the solution according to the invention also allows the curtain holder to be locked in its respectively located position.
  • a positive connection as it were a hooking provided for the position in question.
  • the hooking can be done as I said mechanically, positively. But it is also a holder by magnetic force or negative pressure, etc. possible.
  • the locking is manually or remotely possible and is to unlock again in a return movement.
  • a locking in the pivoted position of the curtain holder is usually useful when a new train is retracted or cleaning, maintenance or adjustment work is performed.
  • the at least one curtain holder can be moved manually. To do this, it can be folded down before pulling in the web and brought back into the operating position after retraction. Instead of the manual movement of the curtain holder is also possible, which takes place via an actuator.
  • an actuator for example, a pneumatic cylinder, a rotary actuator or otherwise known actuators can be used. This variant is very suitable when pulling in the web.
  • the curtain holders can be folded down before retraction of the web and bring after retraction back into operating position.
  • the curtain holder can also be moved by automated means. As a result, the curtain holder can be swiveled very safely and quickly if a web break has been detected at any point in the coater. This automated panning is also very useful as part of a start or stop phase of the swipe.
  • the at least one curtain holder can be automatically or automatically reset. This can be done for example by spring force. If the curtain holders are damaged by external forces, e.g. be pushed out of the operating position at a web break, so they can automatically return to the operating position as soon as the external forces no longer work.
  • the at least one curtain holder which bridges the path between the spoiler edge and the mating surface or fibrous web, can touch the tear-off edge. But also a distance between the upper edge of the curtain holder and the spoiler lip, for example between 0 and 30mm, is possible. In addition, a distance between the lower edge of the curtain holder and the counter surface (or fibrous web) is possible, which is approximately between 0 and 2 mm.
  • the applicator according to the invention with the at least one movably arranged curtain holder can be both a known sliding layer nozzle and a slot or Twindüse or Tandemdüse.
  • the curtain that can be produced by the commission concerned can be both narrower than the width of the fibrous web (inboard), which is preferred here, but also be wider than the web width (overboard).
  • Figure 1 is a schematic representation of the curtain applicator according to the invention with curtain holders that define a curtain width that is less than the web width (inboard), seen in the machine direction;
  • Figure 2 a schematic representation of the curtain applicator according to the invention with curtain holders that define a curtain width that is wider than the web width (overboard), seen in the machine direction
  • Figure 3 is a schematic, perspective view of the curtain applicator according to the invention with a first variant of the arrangement of the curtain holder
  • Figure 4 a schematically illustrated side view of the curtain applicator according to the invention gem.
  • Figure 2 with a further variant of
  • FIG. 5 a schematic, perspective view of the curtain applicator according to the invention according to Figure 1 with a further variant of the arrangement of the curtain holder
  • Figure 6 a schematic, perspective view of another design of the curtain applicator according to the invention with a further variant of the arrangement of the curtain holder
  • Figure 7 a schematically illustrated side view of the curtain applicator according to the invention gem.
  • Figure 1 with a further variant of Arrangement of the curtain holder
  • Figure 8 a schematically illustrated side view of the curtain applicator according to the invention gem.
  • Figure 1 with a further variant of the arrangement of the curtain holder
  • FIG. 1 shows a curtain applicator 1 for coating a running paper, board or other fibrous web 2 with a liquid to pasty application medium from the front, that is, with a view to the machine longitudinal direction MD. It includes, in addition to some units not shown here, such as air boundary layer control devices, start-stop collecting devices or measuring trays, measuring devices, feed lines, etc. above the fibrous web 2 and spaced from her and only roughly indicated curtain application head 3.
  • This application head 3 extends in the transverse direction QD of the machine, ie in the width direction of the fibrous web 2.
  • the application head 3 is formed here as a sliding layer 1.1.
  • This sliding layer 1.1 preferably serves a multi-layer job, but can also be designed for single-layer order.
  • two exit gaps 4 are shown, which are closed on each side with a nozzle edge limiter 5.
  • a curtain holder 6 is movably arranged on each side, thus on the driver side FS and drive side TS of the coating machine.
  • the two present curtain holder 6 define a width VB1 of the curtain 7, which is less than the web width BB and therefore referred to as inboard driving style.
  • the curtain 4 falls from a trailing edge 8 of the job head 3 substantially following the gravity, down on the fibrous web 2 and deposits on the surface as a coating layer.
  • the curtain holder 6 serve to guide and also limit the size of the approximately 200 mm long single-layer or multi-layer curtain 7 between the tear-off edge 8 and the surface of the fibrous web 2 at its side edges 6a and 6b.
  • the curtain holder 6 are adjustable in the width direction of the curtain 4. In the examples shown, the two curtain holder 6 are within the width of the fibrous web 2, which is referred to as "inboard" -Fahrweise.
  • the curtain holder 6 are arranged at a distance A between 0 and 30 mm to the trailing edge 8.
  • the adjustment of the curtain holder 6 can be made in the direction of the machine center so far that a distance B between the end of the exit slit 4, where the Düsenbegrenzer 5 determines the nozzle width, and the side edge 6a and 6b of the curtain are respected.
  • the distance B is 0 to 500mm. At 0mm distance, no medium losses occur at the edge. Otherwise, the adjustment range depends on the type of application medium, ie, depending on the grade.
  • Shown in Figure 1 is also that between the lower edge of the curtain holder 6 and the surface of the fibrous web 2 should be a distance C between 0 and 2mm.
  • the distance D should be between 1 and 40mm.
  • the goal here is the smallest possible amount.
  • the largest specified amount D is advisable if there are major variations in the course of the web and / or inaccurately cut web edges 2a and / or 2b. In experiments, between 5 and 10mm have turned out to be the most realistic.
  • FIG. 2 shows a further design of a curtain applicator according to the invention, namely a slot nozzle 1.2 (also referred to in the art as a slot), which likewise has a curtain holder 6, as shown in FIG.
  • These curtain holders 6 In the example and in contrast to Figure 1, define a curtain width VB2, which is wider than the web width BB and is therefore referred to as "overboard” in professional circles.
  • the nozzle edge limiter 5 and the curtain holder 6 are exactly above each other in the example In the case of the overboard method of travel, the curtain holder 6 shown is lower than the surface of the fibrous web 2.
  • the distance D2 between the edges 2a, 2b of the fibrous web 2 and the side edges of the curtain holder 6a or 6b is between 1 mm and 40 mm.
  • the curtain excess 7.1 and 7.2 flowing past the web edges 2a and 2b passes into a collecting device extending below the fibrous web 2, likewise in the transverse direction QD, for example collecting trough 9, from which the collected medium is withdrawn. If desired, the medium can be regenerated and re-circulated to the commissioned work.
  • FIG. 3 shows in a perspective view of the curtain applicator unit according to the invention or the sliding layer nozzle 1.1 a first variant of the arrangement of the curtain holders 6.
  • the curtain holder 6 are rotatably movable. This is done here by means of a hinge or rotary joint 10, which connects the curtain holder 6 with the curtain application head 3.
  • the curtain holder 6 In solid line the curtain holder 6 is in operating position I and in dashed line it is shown in service position Il (tilted position).
  • Il tilt position
  • FIG. 4 shows a schematically illustrated side view of the curtain applicator according to the invention - here in the form of a slot nozzle 1.2 - as in FIG. 2.
  • a translatory, rectilinear movement is shown.
  • the curtain holder 6 are horizontally movable via a linear guide 11 corresponding to the web running direction L, as the horizontal arrow pointing. This one wins a distance F between the operating position I and adjustment position II, wherein the adjustment position Il is again indicated in dashed line.
  • This linear guide 11 is attached to the curtain applicator head 3.
  • here runs the fibrous web 2 via a support roller 12, so that the curtain 7 impinges on a supported area.
  • the distance C indicated in FIG. 1 is likewise present, which is between 0.3 and 2 mm.
  • FIG. 5 shows a further schematic perspective view of the curtain applicator according to the invention again in the form of the sliding layer nozzle 1.1 shown in FIG. shown.
  • the curtain holder 6 is in a further variant to the outside via a sliding bush 13 translationally and in a straight line from the operating position I in an adjustment position Il - and vice versa - movable.
  • the inboard driving style is also shown here.
  • transverse direction QD and the machine direction MD.
  • FIG. 6 shows a further schematic perspective view of the curtain applicator according to the invention, in the form of a so-called Twindüse 1.3.
  • the Twindüse 1.3 consists of two composite applicator head halves, each with a coating medium chamber for the dispensed medium M1 and M2.
  • the Twindüse two gleichgeartete (same rheology and / or composition) or different application media M1 and M2 can be submitted.
  • the media or each fall from the two downwardly directed slot 14 and thereby form a double-layered curtain, which deposits as a double layer in the application width AB on the fibrous web 2.
  • Figure 7 shows another schematically illustrated side view of a curtain applicator in the form of the already shown Gleit Anlagendüse 1.1 gem.
  • Figure 1. with a further variant of the arrangement of the curtain holder 6.
  • curtain holder 6 is here again attached to the applicator head 3, to which a movable bar 15 for connecting curtain holder 6 with the applicator head 3 is used.
  • the strip 15 may be suitably designed as a spiral spring, which acts in the operating position against a stop not shown here. As a result of the spring force acting here, the curtain holder 6 is automatically deflected first and returned to the operating position I from the deflection position II. This is the case, for example, when external forces that caused the deflection (e.g., web break) no longer work.
  • FIG. 8 shows a further schematically illustrated side view of the sliding layer nozzle 1.1. It should be indicated that the curtain holder 6 by an actuator 18 is movable. As an actuator 18 here is a pneumatic cylinder, which is hinged to the curtain applicator head 3. The deflection or adjustment position Il is again shown in dashed line
  • curtain applicator also other designs, as they are specified in the examples, usable.
  • a so-called tandem nozzle for a multi-layer application in which a plurality of slot nozzle heads are lined up in the machine direction, could be used.

Landscapes

  • Coating Apparatus (AREA)

Abstract

La présente invention concerne un dispositif d'enduction au rideau (1.1, 1.2, 1.3) permettant d'enduire une bande de papier, de carton, ou d'autre matière fibreuse (2) en mouvement, dans une enduiseuse. Ce dispositif comporte une filière d'application au rideau (3) disposée au-dessus de la bande de matière fibreuse (2) et correspondant au moins à la largeur de la bande de matière fibreuse (2). Cette filière permet de distribuer au moins un enduit liquide ou pâteux (M1, M2) sous la forme d'un rideau monocouche ou multicouche (7) tombant, essentiellement par gravité, sur la bande de matière fibreuse (2). Pour guider le rideau (7) sur son trajet de chute, c'est-à-dire entre le bord de chute (8) de la filière d'application (3) et la surface de la bande de matière fibreuse (2) se déplaçant dans le sens de la longueur (MD) sous la filière d'application (3), ledit dispositif comporte une cage de rideau (6) qui est située sur au moins un bord latéral du rideau et qui comporte une rigole de récupération d'enduit, et un dispositif de raclette à voile d'air. Selon l'invention, la cage de rideau (6) est montée mobile sur un élément structural de l'enduiseuse, et plus précisément du dispositif d'enduction au rideau (1.1, 1.2, 1.3), de façon que la cage de rideau (6) soit maintenue en position de fonctionnement (I) pendant le fonctionnement du dispositif d'enduction (1.1, 1.2, 1.3), mais puisse cependant quitter sa position de fonctionnement (I).
EP10702309A 2009-02-12 2010-02-03 Dispositif d'enduction au rideau Withdrawn EP2396121A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910000809 DE102009000809A1 (de) 2009-02-12 2009-02-12 Vorhang-Auftragswerk
PCT/EP2010/051315 WO2010091986A1 (fr) 2009-02-12 2010-02-03 Dispositif d'enduction au rideau

Publications (1)

Publication Number Publication Date
EP2396121A1 true EP2396121A1 (fr) 2011-12-21

Family

ID=42041850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10702309A Withdrawn EP2396121A1 (fr) 2009-02-12 2010-02-03 Dispositif d'enduction au rideau

Country Status (5)

Country Link
EP (1) EP2396121A1 (fr)
JP (1) JP2012517340A (fr)
CN (1) CN102316995A (fr)
DE (1) DE102009000809A1 (fr)
WO (1) WO2010091986A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010042291A1 (de) 2010-10-11 2012-04-12 Fmp Technology Gmbh Fluid Measurements & Projects Vorrichtung zum Vorhangbeschichten eines Trägers
JP2014208329A (ja) * 2013-03-29 2014-11-06 株式会社リコー カーテン塗布装置及びカーテン塗布方法
EP2952264B1 (fr) 2014-06-05 2019-10-30 Valmet Technologies, Inc. Dispositif de revêtement à rideau
DE102016013723A1 (de) * 2016-11-17 2018-05-17 Atlas Copco Ias Gmbh Vorrichtung zum Auftragen eines viskosen Materials
WO2019025084A1 (fr) * 2017-08-02 2019-02-07 Voith Patent Gmbh Procédé de revêtement d'une bande de matériau

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GB908653A (en) * 1960-02-29 1962-10-24 Metal Box Co Ltd A method of and apparatus for forming a liquid curtain for coating articles
US4060649A (en) * 1976-12-06 1977-11-29 Sprague Electric Company Paint curtain machine and method of painting
FR2580199B1 (fr) * 1985-04-15 1988-09-09 Siderurgie Fse Inst Rech Procede et dispositif de reglage de la largeur d'un rideau de liquide
BR9203828A (pt) * 1991-10-11 1993-06-15 Eastman Kodak Co Aparelhagem e processo para recobrir por cortina um suporte movente,com uma ou mais camadas de liquido de recobrimento
JP3263298B2 (ja) * 1995-11-22 2002-03-04 ニチハ株式会社 建築材の塗装方法
JP4120913B2 (ja) * 2000-01-14 2008-07-16 富士フイルム株式会社 塗布方法
DE10012256A1 (de) * 2000-03-14 2001-09-20 Voith Paper Patent Gmbh Auftragsvorrichtung
DE10232949A1 (de) 2002-07-19 2004-01-29 Voith Paper Patent Gmbh Vorhang-Auftragsvorrichtung
DE102007000778A1 (de) 2007-09-27 2009-04-02 Voith Patent Gmbh Auftragsvorrichtung und Verfahren zum Betreiben einer Auftragsvorrichtung
DE102008040409A1 (de) 2008-07-15 2010-01-21 Voith Patent Gmbh Vorhang-Auftragswerk

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Title
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Also Published As

Publication number Publication date
JP2012517340A (ja) 2012-08-02
DE102009000809A1 (de) 2010-08-19
WO2010091986A1 (fr) 2010-08-19
CN102316995A (zh) 2012-01-11

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