EP1377391A1 - Dispositif de revetement d'une bande continue de materiau en deplacement - Google Patents

Dispositif de revetement d'une bande continue de materiau en deplacement

Info

Publication number
EP1377391A1
EP1377391A1 EP02730107A EP02730107A EP1377391A1 EP 1377391 A1 EP1377391 A1 EP 1377391A1 EP 02730107 A EP02730107 A EP 02730107A EP 02730107 A EP02730107 A EP 02730107A EP 1377391 A1 EP1377391 A1 EP 1377391A1
Authority
EP
European Patent Office
Prior art keywords
suction
curtain
web
guide element
coating
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.)
Granted
Application number
EP02730107A
Other languages
German (de)
English (en)
Other versions
EP1377391B1 (fr
Inventor
Rolf Metzger
Luca Frediani
Bruno Holtmann
Hans Hardegger
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.)
Bachofen and Meier AG Maschinenfabrik
Original Assignee
Bachofen and Meier AG Maschinenfabrik
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 Bachofen and Meier AG Maschinenfabrik filed Critical Bachofen and Meier AG Maschinenfabrik
Publication of EP1377391A1 publication Critical patent/EP1377391A1/fr
Application granted granted Critical
Publication of EP1377391B1 publication Critical patent/EP1377391B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05C5/005—Curtain coaters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/04—Curtain coater

Definitions

  • the invention relates to a device for coating a running material web with a slot nozzle, from which the coating material in a free-falling
  • Curtain emerges and which has a downwardly extending guide element for the edge of the curtain on each side immediately next to the exit gap, and with an element arranged in the edge region of the web for sucking off coating material.
  • curtain coaters are known for coating running material webs, such as paper or cardboard webs, plastic or metal foils, in which the coating material (plastic dispersions, pigment coating color, etc.) is applied to the material web from a slot nozzle in a free-falling curtain.
  • the coating material plastic dispersions, pigment coating color, etc.
  • WO 99/09253 to guide the two curtain edges with a guide element which extends from the slot nozzle down to the vicinity of the material web.
  • the two guide elements are designed in the form of strips, their inner side facing the curtain being flat. So that the curtain adheres better to the guide elements and thus counteracts constriction at the curtain edges, it is known from DE 197 35 558 A to wet the inside of each guide element with an auxiliary liquid which influences the surface tension, for example with water or coating material.
  • WO 98/47630 a device of the generic type for applying dispersions to a material web is known, in which an element for suction is located at a distance behind the slot nozzle in each edge region of the web of dispersion is arranged. Suction nozzles that can be positioned vertically and transversely to the direction of web travel are used, which suck off the additional job on the two web edges.
  • the additional application of coating material is caused by the fact that the free-falling curtain constricts somewhat at its edges at the end of the edge guides, and thus the application to the web is somewhat thicker in these areas and an edge bead is formed. This effect is referred to as "neck in”.
  • the additional application at the edges leads to undesirable profile fluctuations in the coated web and can lead to problems in a subsequent dryer or when the coated web is rolled up.
  • the invention has for its object to improve a coating device of the generic type so that a uniform application of coating material over the entire web width with straight and sharp coating edges is possible with a structurally simplified design.
  • a suction element is fastened to the lower end of each guide element, the inside of which faces the curtain is flush with the inside of the guide element and through which a suction channel connected to a suction line leads, which opens into a suction slot at the lower end of the Inside of the suction element runs perpendicular to the curtain level.
  • the design of the suction element ensures, on the one hand, a trouble-free, precisely guided run of each curtain edge up to just in front of the web, on the other hand, the additional application is suctioned horizontally outwards at the edges and thus prevents the so-called "neck in” effect. A sharp, straight line is created Edge of the coating on the web.
  • FIG. 1 shows the edge area of the coating device as a cross section through the curtain
  • Figure 2 shows a side view of the device of Figures 1 and
  • Figure 3 is a plan view from above of the suction element.
  • the coating device shown in the figures is used to apply a dispersion pressure-sensitive adhesive (for example an acrylate) in aqueous solution to a siliconized paper web. Due to its advantageous properties, the
  • the device contains a slot nozzle 1 which is suspended above the run of the web to be coated in the frame of the device.
  • the slot nozzle 1 is connected to a supply for coating material and has on its underside an outlet gap 3 which extends over the coating width and from which the coating material emerges and forms a free-falling curtain which falls onto the web surface.
  • a strip-shaped guide element 2 is attached directly next to the outlet gap 3, which extends downwards into the vicinity of the web.
  • Each guide element 2 has an inner side facing the curtain, which is coated with an influencing auxiliary liquid, for example with
  • each guide element 2 has a through hole 4 above the outlet gap 3 of the slot nozzle 1, which is connected to a supply line 5, via which the auxiliary liquid is supplied.
  • the through hole 4 opens into a channel 14 which runs vertically downward above the outlet gap 3 and whose outlet opening is located directly next to the latter at the height of the outlet gap 3.
  • the feed channel 14 is implemented in a structurally simple manner such that a vertical longitudinal groove is formed on the outer surface of the side wall of the slot nozzle 1 and is sealed when the guide element 2 is fastened to the side wall.
  • Each guide element 2 is preferably designed in the form of a strip and has a thickness of 0.1 mm - 3 mm and a width of approximately 10 to 20 mm.
  • the length of the guide element 2 is adapted to the height of the curtain, that is to say the distance of the exit gap from the web to be coated.
  • the drop height of the curtain and thus the downward free length of each guide element 2 is between 50 mm and 250 mm.
  • a suction element 6 is fastened to the lower end of each guide element 2, the inside of which faces the curtain is flush with the inside of the guide element 2. The curtain edge flowing down on the guide element 2 and then on the suction element 6 is thus not disturbed on its way to the web.
  • the suction channel 7 is arranged at the lower end of the suction element 6 and opens into a suction slot 9 which runs perpendicular to the curtain at the lower end of the inside of the suction element 6. The length of the measured in the direction of web travel
  • Suction slot 9 is 0.5 mm to 15 mm, preferably 5 mm to 12 mm, so that the suction function is guaranteed in the event of corresponding fluctuations in the curtain. Its height is 0.1 mm to 2 mm, preferably 0.5 mm to 1 mm. It is arranged on the underside of the suction element 6 so that its distance from the web is 0.1 mm to 3 mm. So that this small distance can be maintained, the suction channel 7 is closed at the bottom with a thin bottom 10, which is only slightly inclined against the web and ends in the suction slot 9 with a sharp edge. The thickened edge of the coating material is thus suctioned off essentially in a horizontal direction. This has the advantage that the suction counteracting forces are minimal and at the same time the edge
  • Suction is not smeared.
  • the further horizontal guidance without dead spaces of the suction channel 7 counteracts deposits of coating material which has been sucked off.
  • rinsing liquid for example wise with water
  • two rinsing lines 11 lead parallel to the suction line 8 to the suction slot 9, which open into the suction channel 7 at a short distance from them.
  • the rinsing liquid is carried away together with the coating material sucked off via the suction line 8.
  • the suction line 8 is connected to a pump for this purpose.
  • the two guide elements 9 are made of a material that is flexible to a limited extent, elastically bendable, preferably of spring steel.
  • a support bar 12 extends outwards at a small distance parallel to the guide element 2 and is also fastened to the side wall of the slot nozzle 1.
  • the support bar 12 is made of a rigid material, for example of sufficiently thick steel, and ends at a short distance in front of the suction element 6.
  • the adjusting screw 13 allows the free end of the guide element 2 with the attached suction element 6 to be adjusted transversely to the web running direction in order to be able to set the position of the suction slot 9 exactly.
  • the course of the guide element 2 can also be varied to a limited extent with the adjusting element in order to optimally adjust the guidance and posture of the curtain edge.

Landscapes

  • Coating Apparatus (AREA)

Abstract

Des dispositifs connus de revêtement de bandes continues de matériaux en déplacement comprennent une tuyère rainurée (1) d'où le matériau de revêtement est déchargé dans un voile tombant librement, et qui présente un élément de guidage (2) pour le bord du voile, s'étendant vers le bas de chaque côté dans le voisinage immédiat de la fente de sortie (3). Des éléments d'aspiration du matériau de revêtement sont disposés dans la zone marginale de la bande. L'invention est caractérisée en ce qu'un élément d'aspiration (6) est fixé sur l'extrémité inférieure de chaque élément de guidage (2), et en ce que la face interne dudit élément d'aspiration dirigée vers le voile est alignée avec la face interne de l'élément de guidage (2). Un canal d'aspiration (7) connecté à une ligne d'aspiration (8), est guidé à travers l'élément d'aspiration (6), ledit canal débouchant dans une pointe d'aspiration (9) s'étendant perpendiculairement au plan du voile, à l'extrémité inférieure de la face interne.
EP02730107A 2001-04-09 2002-04-05 Dispositif de revetement d'une bande continue de materiau en deplacement Expired - Lifetime EP1377391B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117668A DE10117668A1 (de) 2001-04-09 2001-04-09 Vorrichtung zum Beschichten einer laufenden Materialbahn
DE10117668 2001-04-09
PCT/EP2002/003776 WO2002081103A1 (fr) 2001-04-09 2002-04-05 Dispositif de revetement d'une bande continue de materiau en deplacement

Publications (2)

Publication Number Publication Date
EP1377391A1 true EP1377391A1 (fr) 2004-01-07
EP1377391B1 EP1377391B1 (fr) 2005-06-08

Family

ID=7680954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02730107A Expired - Lifetime EP1377391B1 (fr) 2001-04-09 2002-04-05 Dispositif de revetement d'une bande continue de materiau en deplacement

Country Status (4)

Country Link
US (1) US7081163B2 (fr)
EP (1) EP1377391B1 (fr)
DE (2) DE10117668A1 (fr)
WO (1) WO2002081103A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50209547D1 (de) * 2002-09-10 2007-04-05 Ilford Imaging Ch Gmbh Verfahren und Vorrichtung zur Vorhangbeschichtung eines bewegten Trägers
DE10316999A1 (de) * 2003-04-11 2004-10-28 Bachofen & Meier Ag Vorrichtung zum Beschichten einer laufenden Materialbahn
DE102004056270A1 (de) * 2004-11-22 2006-05-24 Basf Ag Seitenführung für die Vorhangbeschichtung
FI120885B (fi) * 2008-11-20 2010-04-15 Metso Paper Inc Reunaohjain
DE102008054892A1 (de) * 2008-12-18 2010-06-24 Voith Patent Gmbh Vorhang-Auftragswerk
US8881674B2 (en) * 2009-09-08 2014-11-11 Ricoh Company, Ltd. Curtain coating apparatus and curtain coating method
DE102009048820A1 (de) * 2009-10-09 2011-04-14 Andritz Küsters Gmbh Vorhang-Auftragswerk
DE102012004875B3 (de) * 2012-03-10 2012-07-19 Andritz Küsters Gmbh Vorrichtung zur Vorhangbeschichtung einer laufenden Warenbahn
US9333524B2 (en) 2013-03-15 2016-05-10 Ricoh Company, Ltd. Slot curtain coating apparatus and slot curtain coating method
DE102014013996A1 (de) 2014-09-25 2016-03-31 Andritz Küsters Gmbh Verfahren und Vorrichtung zur Vorhangbeschichtung

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4559896A (en) * 1983-09-15 1985-12-24 Ciba Geigy Corporation Coating apparatus
JPH01199668A (ja) * 1988-02-01 1989-08-11 Fuji Photo Film Co Ltd 塗布装置
EP0606038B1 (fr) * 1993-01-07 1999-08-18 Eastman Kodak Company Dispositif d'enduction au rideau avec évacuation du bord
US6464858B1 (en) * 1994-08-25 2002-10-15 Phillips Petroleum Company Method for improving the yield of heavy hydrocarbons in a thermal cracking process
EP0841588B1 (fr) * 1995-04-26 2002-07-10 ILFORD Imaging Switzerland GmbH Procédé et appareil pour le revêtement par rideau d'un support en mouvement
DE19633741C2 (de) * 1996-08-22 1998-06-04 Sundwiger Eisen Maschinen Vorrichtung zum Benetzen einer Seite einer laufenden Materialbahn
DE19735588A1 (de) * 1997-04-21 1999-02-18 Jagenberg Papiertech Gmbh Verfahren und Vorrichtung zum Auftragen einer Pigmentstreichfarbe auf eine Papier- oder Kartonbahn
DE19716466A1 (de) * 1997-04-21 1998-10-22 Bachofen & Meier Ag Verfahren und Vorrichtung zum Auftragen von Dispersionen auf eine Materialbahn
US6468592B1 (en) * 1997-08-15 2002-10-22 Jagenberg Papiertechnik Gmbh Applying a pigment coating to a paper or cardboard strip
DE19735558A1 (de) 1997-08-16 1999-02-25 Bosch Gmbh Robert Vorrichtung und Verfahren zur Brauchwassererwärmung
DE59702151D1 (de) * 1997-10-03 2000-09-14 Troller Schweizer Engineering Verfahren und Apparatur zur Vorhangbeschichtung eines bewegten Trägers
JP2000354813A (ja) * 1999-06-15 2000-12-26 Fuji Photo Film Co Ltd カーテン塗布装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02081103A1 *

Also Published As

Publication number Publication date
US7081163B2 (en) 2006-07-25
US20050126479A1 (en) 2005-06-16
EP1377391B1 (fr) 2005-06-08
WO2002081103A1 (fr) 2002-10-17
DE10117668A1 (de) 2002-10-10
DE50203346D1 (de) 2005-07-14

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