EP2596171B1 - Coucheuse rideau - Google Patents

Coucheuse rideau Download PDF

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Publication number
EP2596171B1
EP2596171B1 EP11732465.7A EP11732465A EP2596171B1 EP 2596171 B1 EP2596171 B1 EP 2596171B1 EP 11732465 A EP11732465 A EP 11732465A EP 2596171 B1 EP2596171 B1 EP 2596171B1
Authority
EP
European Patent Office
Prior art keywords
application
opening
application medium
filter
curtain
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.)
Active
Application number
EP11732465.7A
Other languages
German (de)
English (en)
Other versions
EP2596171A1 (fr
Inventor
Stefan Reich
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
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Voith Patent GmbH
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Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2596171A1 publication Critical patent/EP2596171A1/fr
Application granted granted Critical
Publication of EP2596171B1 publication Critical patent/EP2596171B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
    • D21H23/48—Curtain coaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/40—Filters located upstream of the spraying outlets
    • 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
    • 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 invention relates to a curtain applicator for coating a running paper, cardboard or other fibrous web with at least one liquid to pasty application medium, comprising a above the fibrous web and spaced from her machine-wide application head with at least one application medium chamber, in each case at least one opening for the the application head emits the at least one application medium in the form of a free-falling curtain to the fibrous web and wherein the applicator head or the opening is connected to at least one application medium supply line, in the various facilities for collecting or buffering, venting, Filtering, temperature control, flow control, etc. are involved.
  • the dosage does not apply because there is no excess. That is, when curtain coating only the amounts are applied, which should ultimately remain on the substrate. Consequently, the quantities of application medium which have to be pumped to the curtain applicator are very small.
  • the curtain coating also requires a venting of the coating color, because the curtain produced by the commission and is very sensitive and causes problems due to gas (air) content even before the actual coating. Moreover, in curtain coating plants, it is necessary to keep the system clean. Especially with a job media change a meticulous, time-consuming cleaning is required.
  • the application medium in particular pigment-containing coating color in the feed system is finely filtered.
  • This is important because of the generally small gap width of the dispensing nozzles, which is usually around 0.2 to 0.4 mm.
  • a partial clogging of the nozzles (which is referred to as plugging formation) has fatal consequences, especially in curtain applicators. Namely, there is a beam splitting with contraction of the curtain edges. On the fibrous web these edges lead to a compared to the target repeatedly excessive amount of stain, which is later also rudimentary not dried.
  • the negative sequence is that a strong color build-up occurs on subsequent rolls within a machine for the production and / or coating of the fibrous web, which is why too much cleaning effort is necessary.
  • curtain applicators with filter are, for example, from the EP 1533418 , of the EP 1518962 or the US 5,985030 known.
  • At least one filter is provided for the respective application medium, wherein the filter is directly connected to the opening of the application medium chamber and wherein the filter has a conical filter insert with a small mesh size between 0.1 and 0.4 mm.
  • the filter is installed immediately in front of the clip opening or integrated into the at least one opening.
  • the filter is a so-called “police filter” which is present as the last element in front of this opening to the application medium chamber or in the opening.
  • the mesh size is adjusted approximately to the width of the nozzle gap.
  • the installation of the filter is dependent on the number and arrangement of the openings or nozzle entries. Thus, it may be appropriate in certain cases, if only one opening and thus only a single filter is present.
  • the opening and the filter can be arranged on one of the end faces of the applicator head, ie either on the drive side or on the driver's side of the machine.
  • This version is particularly suitable for so-called slot dies (slot dies) and small machine width.
  • the opening and thus the filter can also be arranged alternately approximately in the middle of the machine-width application head. This version is especially designed for so-called sliding layer or cascade nozzles (Slide Dies) and small machine width.
  • the opening may be at both ends of the applicator head, i. be arranged on leader and drive side of the machine.
  • This version will be chosen for Slot Dies (Slot Dies) with large machine width.
  • An alternative embodiment is also that a plurality of openings are arranged distributed over the width of the applicator head.
  • This version is especially designed for so-called sliding layer or cascade nozzles (Slide Dies) and larger machine widths
  • multiple filters can also be retrofitted into existing paint feed systems.
  • the invention is applicable for both single-layer and multi-layer curtain applicators. In the latter case of application, a filter is thus used for one application medium or one coating color or one layer.
  • curtain applicator comes as already described both a slot (Slot Die) and a slide layer nozzle (Slide Die) into consideration.
  • front side of the applicator head can be connected to at least one bypass line.
  • the relatively small proportion of the application medium, which has drained off through the withdrawal line or withdrawal lines, can be returned to the media preparation. This then returns together with fresh application medium to at least one supply line.
  • curtain coater 1 Shown in the example of the FIG. 1 a curtain coater 1 as part of a fibrous web making machine or coater.
  • the curtain coater 1 is used to coat a running paper, cardboard or other fibrous web 2 with a liquid to pasty application medium 3 for the purpose of their refinement or improvement of their printing properties.
  • the curtain applicator unit 1 comprises a machine-width application head 4 arranged above the fibrous web 2 and spaced therefrom, with an application medium chamber 7 extending also in the width direction from the left end side 5 to the right end side 6.
  • An opening or nozzle inlet 8 opens into this chamber 7 for the one application medium 3.
  • this opening 8 is arranged on the left-hand side 5 shown in the figure, which is located on the drive side TS of the machine.
  • the application head 4 is the application medium 3 in the form of a free-falling curtain 9 to the fibrous web 2 from.
  • the opening 8 is connected on the one hand with a coating medium supply line 10, in which various facilities for collection or buffering, venting, filtering, temperature control, flow control, etc. are included, which are designated overall for the purpose of simplifying the illustration with 11.
  • the application head 4 is provided with a bypass line 12 for discharging the application medium 3.
  • a filter 13 is installed immediately before or in the at least one opening or nozzle inlet 8.
  • This filter 13 serves as a so-called "police filter”, which is arranged as the last element in front of the opening 8 to the application medium chamber 7 and enters into action immediately before the nozzle inlet.
  • FIG. 1 example shown is only one feed opening 8 for the an existing application medium chamber 7 and thus only a filter 13 clearly shown.
  • Dash-dot lines indicate that, alternatively, an opening 8 'and thus a filter 13' may also be provided on the right-hand side 6 or guide side FS or alternatively approximately in the center of the machine-width application head 4 (marked 8 "and 13") or also on Leader and drive side or evenly distributed over the width of the applicator head 4 (marked with 8 '"and 13"') can be arranged.
  • the filter 13 or 13 ', 13 ", 13"' has a conical filter insert 14 with a mesh width Mw between 0.1 and 0.4 mm, whereby a very fine filtering is achieved.
  • FIG. 1 For completeness is in FIG. 1 in addition to existing vent lines 15 which branch off to the top, including shut-off devices 16 and a drip pan 17 for outside the width B of the fibrous web 2 (overboard driving) delivered medium or curtain edge portions 18 via a discharge line 19 the color preparation process or be fed in the circuit of the medium supply 10 shown. Not shown with a star stop pan.
  • bypass line 12 on the driver's side FS which in the example branches off at the front and also extends to the drip pan 17.
  • FIG. 2 is an application head 4a of a curtain applicator 1 a in the form of a slot die (slot Die) shown in the width direction and transverse direction of the machine.
  • a nozzle exit slit 20 of the slit nozzle of the applicator head 4a which has a gap width w of 0.2 to 0.4 mm and from which the curtain 9a drops onto a substrate to be coated or onto the fibrous web 2 running in the direction L and there Application layer or a so-called contour stroke 21 generated.
  • FIG. 3 shows one opposite FIG. 2 changed application head 4b of a curtain applicator 1 b.
  • This application head 4b is referred to as a sliding layer or as a cascade nozzle.
  • the applicator head 4b has in principle for each Application medium 3b to 3n on its own application chamber 7b to 7n, which merges into a respective supply gap with a corresponding outlet nozzle gap 20b to 20n.
  • the outlet nozzle gap 20b to 20n in each case branches off from the application medium chamber 7b, 7n and ends at the surface 22 of the application head 4b designed as a sliding layer nozzle.
  • the running single-layer or multi-layer curtain 9b then produces a single-layer or multi-layer coating medium layer corresponding to the desired number of application layers on the fibrous web not shown here.
  • Recognizable in FIG. 3 is also how the individual application media 3b to 3n overlap on the surface 22 and these layers S fall down as a multilayer curtain 9b following substantially the force of gravity.
  • openings 8 ', 8 ", 8'” and filters 13 ', 13 "and 13"' which are also possible in FIG. 1 were explained, also for the in FIGS. 2 and 3 shown embodiments apply.
  • FIG. 5 shows a possible arrangement of the filter 13 in the opening 8 or through the opening 8 reaching. This figure also applies analogously to openings 8 ', 8 ", 8"' and filters 13 ', 13 "and 13"'.

Landscapes

  • Coating Apparatus (AREA)

Claims (6)

  1. Coucheuse rideau (1, 1a, 1b) pour le revêtement d'une bande de papier, de carton ou d'une autre matière fibreuse en mouvement (2) avec au moins un fluide d'enduction liquide ou pâteux (3, 3a, 3b à 3n), comprenant une tête d'enduction (4, 4a, 4b) de la largeur de la machine, disposée au-dessus de la bande de matière fibreuse (2) et à distance de celle-ci avec au moins une chambre de fluide d'enduction (7, 7a, 7b), dans laquelle débouche respectivement au moins une ouverture (8, 8' " à 8"', 8b à 8n) pour le fluide d'enduction concerné fourni (3, 3a, 3b à 3n), dans laquelle la tête d'enduction (4, 4a, 4b) délivre ledit au moins un fluide d'enduction (3, 3a, 3b à 3n) à la bande de matière fibreuse (2) sous la forme d'un rideau tombant (9, 9a, 9b) et dans laquelle la tête d'enduction (4, 4a, 4b) ou l'ouverture (8, 8' à 8"', 8b à 8n) est reliée à au moins une conduite d'amenée de fluide d'enduction (10), dans laquelle sont incorporés divers dispositifs (11) pour récolter ou accumuler, désaérer, filtrer, tempérer, réguler le débit, etc., dans laquelle il est prévu au moins un filtre (13, 13', 13", 13"') pour le fluide d'enduction (3, 3a, 3b à 3n), qui est en communication directe avec l'ouverture (8, 8', 8", 8"', 8b à 8n), caractérisée en ce que le filtre (13, 13', 13", 13"') présente une garniture de filtre conique (14) avec une largeur de maille (Mw) comprise entre 0,1 et 0,4 mm.
  2. Coucheuse rideau (1) selon la revendication 1, caractérisée en ce que le filtre (13, 13', 13", 13"') est installé immédiatement avant l'ouverture (8, 8', 8", 8"', 8b à 8n) ou est intégré dans ladite au moins une ouverture (8, 8', 8", 8"', 8b à 8n).
  3. Coucheuse rideau (1) selon la revendication 1 ou 2, caractérisée en ce que l'ouverture (8, 8') est disposée dans une des faces frontales (5 ou 6) de la tête d'enduction (4) ou de ladite au moins une chambre de fluide d'enduction (7).
  4. Coucheuse rideau (1) selon la revendication 1 ou 2, caractérisée en ce que l'ouverture (8") est disposée environ au milieu de la tête d'enduction (4) de la largeur de la machine ou de ladite au moins une chambre de fluide d'enduction (7).
  5. Coucheuse rideau (1) selon la revendication 1 ou 2, caractérisée en ce que l'ouverture (8, 8') est disposée respectivement dans les deux faces frontales (5, 6) de la tête d'enduction (4) ou dans celles de ladite au moins une chambre de fluide d'enduction (7).
  6. Coucheuse rideau (1) selon la revendication 1 ou 2, caractérisée en ce que plusieurs ouvertures (8"') sont disposées de façon répartie sur la largeur de la tête d'enduction (4) ou sur celle de ladite au moins une chambre de fluide d'enduction (7).
EP11732465.7A 2010-07-20 2011-07-15 Coucheuse rideau Active EP2596171B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010031558A DE102010031558A1 (de) 2010-07-20 2010-07-20 Vorhangauftragswerk
PCT/EP2011/062138 WO2012010511A1 (fr) 2010-07-20 2011-07-15 Coucheuse rideau

Publications (2)

Publication Number Publication Date
EP2596171A1 EP2596171A1 (fr) 2013-05-29
EP2596171B1 true EP2596171B1 (fr) 2015-01-21

Family

ID=44512826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11732465.7A Active EP2596171B1 (fr) 2010-07-20 2011-07-15 Coucheuse rideau

Country Status (4)

Country Link
EP (1) EP2596171B1 (fr)
CN (1) CN103080421B (fr)
DE (1) DE102010031558A1 (fr)
WO (1) WO2012010511A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012104933U1 (de) * 2012-12-18 2013-01-14 Metso Paper, Inc. Vorrichtung zur Beschichtung einer Faserbahn
US20200164399A1 (en) 2017-08-02 2020-05-28 Voith Patent Gmbh Method for coating a material web

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792317A (en) * 1996-02-07 1998-08-11 Gl&V-Paper Machine Group, Inc. Wet end starch application
DE10032430A1 (de) * 2000-07-04 2002-01-17 Voith Paper Patent Gmbh Auftragsvorrichtung
DE10343022A1 (de) * 2003-09-16 2005-04-07 Voith Paper Patent Gmbh Kontinuierliche Streichfarbenaufbereitung
DE10352807A1 (de) * 2003-11-12 2005-06-23 Voith Paper Patent Gmbh Auftragsvorrichtung
FI118926B (fi) * 2007-02-15 2008-05-15 Metso Paper Inc Paperi-/kartonkirainan verhopäällystyslaite
DE102008000122A1 (de) * 2007-02-24 2008-08-28 Voith Patent Gmbh Überwachung eines Auftragsmedienstromes beim Auftrag auf eine Papier-, Karton- oder andere Faserstoffbahn
DE102007029646A1 (de) * 2007-06-26 2009-01-08 Voith Patent Gmbh Auftragsverfahren sowie Vorhangauftragswerk
DE102008000451A1 (de) * 2008-02-29 2009-09-03 Voith Patent Gmbh Streichstation
DE102008040403A1 (de) * 2008-07-15 2010-01-21 Voith Patent Gmbh Vorhang-Auftragswerk
EP2145693A1 (fr) * 2008-07-16 2010-01-20 Voith Patent GmbH Surveillance d'un flux de milieu d'application lors de l'application sur une bande de papier, de carton ou autre matière fibreuse

Also Published As

Publication number Publication date
DE102010031558A1 (de) 2012-01-26
WO2012010511A1 (fr) 2012-01-26
CN103080421A (zh) 2013-05-01
EP2596171A1 (fr) 2013-05-29
CN103080421B (zh) 2016-06-29

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