EP2198975B1 - Unité d'application de rideau - Google Patents

Unité d'application de rideau Download PDF

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Publication number
EP2198975B1
EP2198975B1 EP09178315A EP09178315A EP2198975B1 EP 2198975 B1 EP2198975 B1 EP 2198975B1 EP 09178315 A EP09178315 A EP 09178315A EP 09178315 A EP09178315 A EP 09178315A EP 2198975 B1 EP2198975 B1 EP 2198975B1
Authority
EP
European Patent Office
Prior art keywords
curtain
chamber
wall
edge
fluid
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
EP09178315A
Other languages
German (de)
English (en)
Other versions
EP2198975A1 (fr
Inventor
Robert Reisenauer
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 EP2198975A1 publication Critical patent/EP2198975A1/fr
Application granted granted Critical
Publication of EP2198975B1 publication Critical patent/EP2198975B1/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
    • B05C5/005—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 away, ie between a trailing edge of the applicator head and the surface, the fibrous web is provided at its two edges depending an edge guide element, wherein the edge guide element in Width direction of the curtain is adjustable.
  • the invention also relates to a process for curtain coating.
  • a generic device and a method is for example from the DE 197 35 588 known.
  • a separate partial stream of coating color of the inner surface of an immediately adjacent to the outlet slit of the slot nozzle of the curtain guide element is supplied.
  • a separating element is still arranged, which separates the respective edge of the curtain and feels to the outside.
  • An embodiment of a curtain commissioned work is among others from the EP-A1- 1 255 615 known and is referred to in professional circles as "Slide Die", ie Gleit Anlagendüse.
  • This so-called Gleit Anlagense contains at least twosignmediumskammem from which the medium passes via a feed gap, which in turn merges into a slot-shaped outlet nozzle, on a sliding surface of the Gleit Mrsdüse.
  • the application medium emerging from the discharge nozzles arranged in parallel one behind the other overlaps one another. At a trailing edge or as a detachment line to be designated edge of the nozzle, this multilayer separates 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 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.
  • edge guide elements bring the curtain, which is about 200m long, close to the fibrous web.
  • edge guide elements including the solutions shown in the cited documents
  • the structures of the edge guide elements are complicated. They are subject to high wear and can also be poorly cleaned.
  • the edge guide element has a cover plate and a bottom plate and consists of two superposed, separate chambers, each having a U-shaped cross section, wherein the first chamber is above the second chamber, the first chamber a fluid or Liquid inlet and the second chamber has a fluid or liquid drain and both chambers are closed at their respective edge of the curtain facing open side of the U-section with a continuous wall such that on the one between the cover plate and the upper edge of the wall in the first Chamber located overflow gap remains. It serves to produce a fluid or liquid film which contacts the respective curtain edge and thereby runs down a drainage surface of the wall.
  • the edge guide element according to the invention and thus also the curtain applicator are characterized by a simple construction. To guide the curtain only a small amount of fluid or liquid is needed. The unwanted color beads at the edges of the surface of the fibrous web are caused by the proper guidance of the curtain and without the curtain is constricted, avoided.
  • the edge guide element in particular its drainage surface contacting the relevant curtain edge, can be easily cleaned due to its simple construction.
  • the cleaning work but also the drainage behavior, if the drainage surface made of stainless steel or aluminum. It is advantageous if this surface is polished or has a roughness value Ra of 0.8 to 1.0.
  • the drainage surface may also be made of plastic, in particular Teflon, which shows a good flow behavior.
  • suction opening is arranged centrally in the drain wall and parallel to the fluid or liquid withdrawal faces.
  • fluid or liquid for the running fluid or liquid film preferably water is provided.
  • a water / coating mixture or, with regard to keeping the drainage surface clean, a mixture which contains surface-active substances, such as commercially available surfactants.
  • the suction opening for the discharged fluid or liquid is about 1 x 5mm in size.
  • This suction opening can be incorporated both vertically and horizontally in the drain wall. Conceivable, however, would be other opening geometries, for example, circular openings. Alternately, in the bottom plate, a lateral slot for a suction or in addition still a paragraph be incorporated.
  • the said overflow gap in the upper chamber is about 10 to 20 mm wide.
  • the bottom plate of the edge guide element is formed obliquely, so that the slope is adapted to the course of a likewise obliquely running fibrous web. It is conceivable that the bottom plate can be adjusted at a desired angle. This gives you the ability to use the marginal guide element, which is very good for the fibrous web running underneath, both for horizontally and obliquely in upwards or downwards running fibrous webs. Conceivable, of course, are also made on stock edge guide elements with differently shaped or slanted at different angles floor panels.
  • edge binding strips according to the invention can be very easily retrofitted into existing curtain coating systems.
  • various embodiments of the curtain dispensing Curtain applicator head such as sliding layer nozzle or slot nozzle as well as single-layered or multi-layered curtain possible.
  • FIG. 1 is a curtain applicator 1 shown for coating a running paper, cardboard or other fibrous web 2 with a liquid to pasty application medium. It includes, in addition to some not shown here with units such as air boundary layer control devices, start-stop-Auffang wornen or tubs, measuring equipment, feeders, etc. above the fibrous web 2 and spaced therefrom arranged and only slightly hinted curtain application head 3.
  • This gun 3 may be formed as a so-called Gleit harshdüse or slot nozzle and is machine width, so over the width of the fibrous web 2 reaching executed.
  • the application head 3 can be designed both for a multi-layer application and for a single-layer application with which a single-layer or multi-layer curtain 4 can be produced.
  • the curtain 4 drops from the tear-off edge 5 of the applicator head 3 substantially following the force of gravity down onto the fibrous web 2 and deposits on its surface as a coating layer AS.
  • the curtain applicator 1 has a lateral, columnar trained edge guide element 6 respectively on the leader side FS and Drive side TS on.
  • This edge guide element 6 serves to guide and also limit the size of the approximately 200 mm long single-layer or multi-layer curtain 4 between the tear-off edge 6 and the surface of the fibrous web 2 at its lateral edges 4a and 4b.
  • the edge guide element 6 is adjustable in the width direction of the curtain 4, as the horizontal double arrows show. In the examples shown, the two edge guide elements 6 are within the width of the fibrous web 2, which is referred to as "inboard" -Fahrweise.
  • FIG. 2 is the edge guide element 6 made FIG. 1 , seen from the side, shown in section. It can be seen that the edge guide element 6 has a cover plate 7 and a bottom plate 8.
  • the edge guide element 6 consists of two superimposed, separate chambers 9 and 10, wherein the first chamber 9 is located above the second chamber 10.
  • the first ie the upper chamber 9 has a fluid or liquid inlet 11 and the second, that is, the lower chamber 10 has a drain 12.
  • Both nozzles or pipes for inlet 11 and outlet 12 point outwards.
  • Both chambers 9 and 10 also have a wall 13 spanning them both. This wall 13 serves the actual guidance of the curtain and therefore contacted with their curtain side facing the respective curtain edge.
  • FIG. 4 It is shown that the chambers 9 and 10 each have a U-shaped cross-section. It can also be seen that the wall 13 has been inserted with its drainage surface 18 in the open side of the U-section facing the curtain edge 4a .4b.
  • overflow gap 15 and / or the suction opening 17 are adjustable in size.
  • the overflow gap is about 10 to 20mm wide. Equally wide is the drainage surface 19 and the wall 13.
  • the suction opening 17 is aligned dare and rectangular. It has a size of 1 x 5mm. In addition, this opening 17 is located directly above the bottom plate and is arranged centrally in the wall 13 parallel to the drain 12.
  • Both chambers 9 and 10 of the edge guide element 6 are otherwise separated from each other by a transverse wall 20.
  • water is preferably used as a fluid or liquid for the running fluid or liquid film 18, which is incidentally also controlled and regulated in its amount.
  • water is preferably used.
  • it is also a water / coating mixture or a mixture of water and surface-active substances, such as commercial surfactants used.
  • FIG. 5 a circuit diagram is shown. This illustrates that the liquid discharged via the outlet 12 of the edge guide element 6 or the fluid or liquid film 18 is sucked to the outside and is fed via a line 21 to a separator 22.
  • the solid-particle-containing liquid is discharged via a drain 23, while the "clean" liquid is sucked out of the separator 22 by means of a vacuum pump 24.
  • This liquid is available as a renewed liquid feed for the edge guide element 6.
  • a flow meter and control valve 25 the desired amount of fluid or liquid is fed via a line to the inlet 11 of the edge guide element.

Landscapes

  • Coating Apparatus (AREA)

Claims (10)

  1. Unité de couchage en rideau (1) pour le revêtement d'une bande de papier, de carton ou d'une autre matière fibreuse (2), comportant une tête de couchage en 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) pour le dépôt d'au moins un fluide de couchage liquide à pâteux (M) sous la forme d'un rideau à une ou plusieurs couche(s) (4), qui tombe en suivant sensiblement la pesanteur sur la bande de matière fibreuse (2), dans laquelle il est prévu, pour le guidage du rideau (4) sur sa trajectoire de chute, c'est-à-dire entre l'arête de déversement (5) de la tête de couchage (3) et la surface de la bande de matière fibreuse (2), un élément de guidage de bord (6) sur chacun de ses deux bords (4a, 4b), dans laquelle l'élément de guidage de bord (6) est, si on le désire, déplaçable dans la direction de la largeur du rideau (4), caractérisée en ce que l'élément de guidage de bord (6) présente une plaque de plafond (7) et une plaque de fond (8) et se compose de deux chambres séparées (9, 10) disposées l'une au-dessus de l'autre, dans laquelle la première chambre (9) se trouve au-dessus de la deuxième chambre (10), la première chambre (9) présente une arrivée de fluide ou de liquide (11) et la deuxième chambre (10) présente une évacuation (12), et les deux chambres (9, 10) sont fermées par une paroi (13), de telle manière qu'il reste uniquement entre la plaque de plafond (7) et l'arête supérieure (14) de la paroi (13) une fente de débordement (15) faisant partie de la première chambre (9) pour produire un film de fluide ou de liquide (18) ainsi qu'entre l'arête inférieure (16) de la paroi (13) et la plaque de fond (8) une ouverture d'aspiration (17) disposée dans le bas de la deuxième chambre (10) et que la paroi (13) présente, sur son côté tourné vers le bord de rideau respectif (4a, 4b), une face d'écoulement (19) pour le film de fluide ou de liquide (18).
  2. Unité de couchage en rideau selon la revendication 1, caractérisée en ce que la première chambre (9) et la deuxième chambre (10) présentent respectivement une section transversale en forme de U, dans laquelle la paroi (13) est introduite dans le côté ouvert de la section transversale en forme de U.
  3. Unité de couchage en rideau selon la revendication 1 ou 2, caractérisée en ce que la première chambre (9) et la deuxième chambre (10) sont séparées l'une de l'autre par une paroi transversale (20).
  4. Unité de couchage en rideau selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que la face d'écoulement (19) de la paroi (13) est polie et se compose d'un matériau tel que l'acier allié ou l'aluminium, ou d'une matière plastique comme le Téflon.
  5. Unité de couchage en rideau selon la revendication 4, caractérisée en ce que la face d'écoulement (19) présente une rugosité Ra d'environ 0,8 à 1,0.
  6. Unité de couchage en rideau selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la fente de débordement (15) et/ou l'ouverture d'aspiration (17) présentent une grandeur réglable.
  7. Unité de couchage en rideau selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'ouverture d'aspiration (17) se trouve au milieu de la paroi (13) et immédiatement au-dessus de la plaque de base (8).
  8. Unité de couchage en rideau selon l'une quelconque des revendications 1 à 7, caractérisée en ce que comme fluide ou liquide pour le film de fluide ou de liquide (18) en écoulement, on peut utiliser de préférence l'eau, mais aussi un mélange eau/encre de couchage ou un mélange d'eau et de substances tensioactives, comme des agents tensioactifs du commerce.
  9. Unité de couchage en rideau selon l'une quelconque des revendications précédentes, caractérisée en ce que l'ouverture d'aspiration (17) mesure environ 1 x 5 mm et est pratiquée verticalement ou horizontalement dans la paroi (13).
  10. Unité de couchage en rideau selon l'une quelconque des revendications précédentes, caractérisée en ce que la fente de débordement (15) et aussi la face d'écoulement (19) ont une largeur de 10 à 20 mm.
EP09178315A 2008-12-18 2009-12-08 Unité d'application de rideau Not-in-force EP2198975B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008054892A DE102008054892A1 (de) 2008-12-18 2008-12-18 Vorhang-Auftragswerk

Publications (2)

Publication Number Publication Date
EP2198975A1 EP2198975A1 (fr) 2010-06-23
EP2198975B1 true EP2198975B1 (fr) 2012-05-02

Family

ID=41566261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09178315A Not-in-force EP2198975B1 (fr) 2008-12-18 2009-12-08 Unité d'application de rideau

Country Status (3)

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EP (1) EP2198975B1 (fr)
AT (1) ATE555858T1 (fr)
DE (1) DE102008054892A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010031576A1 (de) 2010-07-20 2012-01-26 Voith Patent Gmbh Vorhang-Auftragswerk
EP3180475B2 (fr) 2014-08-15 2021-11-03 Voith Patent GmbH Dispositif de couchage
CN115262261B (zh) * 2022-08-03 2024-08-16 欣盛(浙江)无纺科技有限公司 一种用于生产可冲散非织造材料的浆料输送装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5390900A (en) * 1994-04-26 1995-02-21 Int Rolling Mill Consultants Metal strip cooling system
DE19735588A1 (de) 1997-04-21 1999-02-18 Jagenberg Papiertech Gmbh Verfahren und Vorrichtung zum Auftragen einer Pigmentstreichfarbe auf eine Papier- oder Kartonbahn
EP0907103B1 (fr) * 1997-10-03 2000-08-09 Troller Schweizer Engineering AG Procédé et dispositif pour le revêtement par rideau d'un support en mouvement
SE515824C2 (sv) 2000-01-26 2001-10-15 Tetra Laval Holdings & Finance Förfarande för tillverkning av ett flerskiktat förpackningslaminat genom våtbeläggning, samt laminat tillverkat enligt förfarandet
DE10012344A1 (de) 2000-03-14 2001-09-20 Voith Paper Patent Gmbh Vorhang-Auftragsverfahren
DE10117668A1 (de) * 2001-04-09 2002-10-10 Bachofen & Meier Ag Buelach Vorrichtung zum Beschichten einer laufenden Materialbahn
DE10232949A1 (de) 2002-07-19 2004-01-29 Voith Paper Patent Gmbh Vorhang-Auftragsvorrichtung
DE10359117A1 (de) 2003-12-17 2005-07-28 Voith Paper Patent Gmbh Vorhangauftragswerk
DE102004056270A1 (de) * 2004-11-22 2006-05-24 Basf Ag Seitenführung für die Vorhangbeschichtung
FI121189B (fi) * 2007-10-17 2010-08-13 Metso Paper Inc Reunaohjain ja menetelmä verhopäällystyksessä muodostettavan reunaohjaimen toiminta-ajan pidentämiseksi

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Publication number Publication date
EP2198975A1 (fr) 2010-06-23
ATE555858T1 (de) 2012-05-15
DE102008054892A1 (de) 2010-06-24

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