WO2008151943A1 - Dispositif racleur - Google Patents

Dispositif racleur Download PDF

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Publication number
WO2008151943A1
WO2008151943A1 PCT/EP2008/056622 EP2008056622W WO2008151943A1 WO 2008151943 A1 WO2008151943 A1 WO 2008151943A1 EP 2008056622 W EP2008056622 W EP 2008056622W WO 2008151943 A1 WO2008151943 A1 WO 2008151943A1
Authority
WO
WIPO (PCT)
Prior art keywords
doctor
transfer element
bed
doctor blade
application medium
Prior art date
Application number
PCT/EP2008/056622
Other languages
German (de)
English (en)
Inventor
Horst Kaipf
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
Priority to JP2010600020U priority Critical patent/JP3165023U/ja
Priority to EP08760213A priority patent/EP2158044A1/fr
Publication of WO2008151943A1 publication Critical patent/WO2008151943A1/fr

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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/06—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with a blast of gas or vapour

Definitions

  • the invention relates to a Rakelvorhchtung for metering and / or leveling of a liquid applied to a transfer element to pasty
  • the transfer element such as an applicator roll or an endless belt
  • the application medium transfers to a tangent to the transfer element and to be coated paper, cardboard, or other fibrous web.
  • the doctor device has a doctor bed clamped in a holder with a groove in which a rotating, cylindrical doctor bar is accommodated, the doctor bed and thus the doctor bar being pressed or pressed against the carrier element.
  • Such a device is known for example from DE 296 12 843.
  • the machine speeds for producing and refining the fibrous web are very high today for reasons of economy. Therefore, it comes at these high machine speeds and beyond at high solids contents of the application medium (which may be pigmented coating color, but also a starch solution) for so-called rod spitting, during the doctoring or dosing of the previously applied in an indirect manner medium where the im Doctor blade recorded rotating doctor blade rolls on also rotating transfer element.
  • the application medium which may be pigmented coating color, but also a starch solution
  • EP 0 460 771 B1 discloses a solution which is applicable to direct-acting coating devices.
  • the coated paper web is guided along a scraper or scraper blade along.
  • stalagmite consisting of stripped coating compound mixed with fibrous particles from the paper web.
  • stalagmites can break off, fall onto the paper web and cause damage there as well as on web-guiding or treating rollers.
  • a Stalagmitöning liquid preferably water vapor
  • the invention has for its object to provide a squeegee working with a doctor blade device for metering or leveling a applied to a transfer element application medium in which a so-called rod spitting and deposits do not occur, but at least are greatly reduced.
  • the object of the invention is achieved in that a vapor deposition is provided with the steam jets are selectively directed to the outer circumference of the metering rod or on the top of the doctor bed, whereby so-called rod spitting and deposits of the coating medium on the doctor bed avoidable, or at least reduced ,
  • the steam jets are preferably made of water vapor, which is abundant in the fibrous web making machine and is easier to handle Transfer via a suction and transport pipe system to the doctor device.
  • the vapor deposition device is preferably arranged above the doctor bed. From this position, it is easiest to control the steam jets to be dispensed on the doctor blade outer circumference or on the upper side of the doctor bed.
  • the vapor deposition device is designed as a tube rotatable about its longitudinal axis and is provided with at least one discharge opening for the steam jets.
  • the vapor jets can be selectively directed either only to the top of the doctor bed - to avoid deposits there - or to the doctor rod circumference - here to avoid the said rod spitting - act.
  • the steaming device or the tube corresponds approximately to the length of the doctor bed and the metering rod received therein and has a multiplicity of discharge openings arranged next to one another. It is conceivable that individual beams can be emitted with different intensity.
  • the vaporization device or the tube has a substantially smaller length than the doctor bed and the metering rod received therein.
  • This short tube then has, for example, only one or a few vapor discharge openings and is traversing over the said length of the doctor bed and of the doctor bar (ie transversely to the longitudinal extent of the doctor device and also to the running direction of the fibrous web). This makes it possible to react very quickly to zonal deposits of different degrees or bar pudding.
  • the device according to the invention is particularly suitable for film presses with which an application medium is applied in an indirect manner to one or both sides of the web of a paper, board or other fibrous web.
  • the operating window can thus be extended considerably. This means that there are higher solids contents of the application medium (coating color with predominantly carbonate content greater than 65%, coating color with predominantly kaolin content greater than 58%) and also higher machine speeds (for example up to more than 2000 m / min) than hitherto possible.
  • the metering rod used can thereby exercise its function longer in the doctor bed, which extend cleaning cycles and thus operating stoppages are less frequently necessary.
  • line errors in the indirectly applied to the fibrous web layer can be significantly reduced.
  • the production of the fibrous web is significantly more economical than before and the quality of the produced web material.
  • Figure 1 a schematic representation of a doctor device according to the invention in section
  • FIG. 2 shows an application example of the device shown in FIG. 1 in a schematic side view
  • FIG. 1 shows a squeegee device 1 which bears a contact force F against a transfer element 2, i. an applicator roll 3 is pressed.
  • the doctor device 1 has a holder 4, in which a doctor bed 5 is clamped in the example at its foot part 5.1.
  • the doctor bed 5 points in the example chosen also an opposite the foot part 5.1 extended head section 5.2 with a concave groove 5.3 on.
  • the groove 5.3 is limited by an outlet-side and inlet-side lip 5.4 and 5.5.
  • a cylindrical metering rod 6 is rotatably received, with which the metered onto the transfer element 2 and the applicator roll 3 (or on an endless belt) in excess application medium 7 dosed or scraped and / or homogenized.
  • the direction of rotation of the metering rod 6 is indicated by a double arrow DR.
  • the direction of rotation DL) of the transfer element 2 is indicated by an arrow.
  • an above the doctor bed 5 and arranged in parallel to this evaporation device 11 is provided with a Dampfzu réelletechnisch 12 steam jets 13 optional - depending on the set rotational position of the device 11 to the desired area are directable.
  • a Dampfzu réelletechnisch 12 steam jets 13 optional - depending on the set rotational position of the device 11 to the desired area are directable.
  • rays 12 deposits 9 of the coating medium 7 on the doctor bed 5 avoided, or at least reduced.
  • the position Il is shown in dashed lines in Figure 1.
  • the vapor deposition device 11 is formed as a pipe 11 b rotatable about its longitudinal axis 11 a and with at least one discharge opening 11 c for the steam jets 12 provided.
  • the vapor deposition device 11 or the tube 11 b is made in accordance with the length of the doctor blade bed 5 and the metering rod 6 accommodated therein and has a multiplicity of discharge openings 11 c arranged next to one another.

Landscapes

  • Paper (AREA)
  • Coating Apparatus (AREA)

Abstract

L'invention concerne un dispositif racleur destiné à doser et/ou égaliser un fluide d'application (7) liquide à pâteux, appliqué sur un élément de transfert (2). L'élément de transfert (2), par exemple un cylindre applicateur (3) ou une bande continue, transfère le fluide d'application (7) vers une bande de papier, de carton ou d'un autre matériau fibreux (10), tangente à l'élément de transfert, présentant un lit de racleur (5) serré dans un logement (4), pourvu d'une rainure (5.3) dans laquelle une tige de racleur cylindrique, rotative (6), est logée. Le lit de racleur, et donc la tige de racleur (6), sont appuyés ou comprimés contre l'élément de transfert (2). Selon l'invention, un dispositif de vaporisation (11) est prévu pour diriger des jets de vapeur (12) de façon sélective, sur la périphérique extérieure (6.1) de la tige de racleur (6) ou sur le côté supérieur (5.6) du lit de racleur (5), de manière à éviter des projections (8) provenant de la tige et des dépôts (9) du fluide d'application (7) sur le lit de racleur (5).
PCT/EP2008/056622 2007-06-13 2008-05-29 Dispositif racleur WO2008151943A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2010600020U JP3165023U (ja) 2007-06-13 2008-05-29 ドクター装置
EP08760213A EP2158044A1 (fr) 2007-06-13 2008-05-29 Dispositif racleur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710027817 DE102007027817A1 (de) 2007-06-13 2007-06-13 Rakelvorrichtung
DE102007027817.0 2007-06-13

Publications (1)

Publication Number Publication Date
WO2008151943A1 true WO2008151943A1 (fr) 2008-12-18

Family

ID=39768676

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/056622 WO2008151943A1 (fr) 2007-06-13 2008-05-29 Dispositif racleur

Country Status (4)

Country Link
EP (1) EP2158044A1 (fr)
JP (1) JP3165023U (fr)
DE (1) DE102007027817A1 (fr)
WO (1) WO2008151943A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009026495A1 (de) 2009-05-27 2010-12-02 Voith Patent Gmbh Rakelvorrichtung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0380427A2 (fr) * 1989-01-27 1990-08-01 Measurex Corporation Dispositif de contrôle du lissage dans le sens transversal et son procédé d'application
EP0603145A1 (fr) * 1992-12-15 1994-06-22 Valmet Paper Machinery Inc. Procédé et équipement d'enduction d'un rouleau d'une presse encolleuse à film
EP0617167A1 (fr) * 1993-03-25 1994-09-28 Valmet Paper Machinery Inc. Méthode et équipement pour limiter la largeur d'enduction et/ou pour prévenir les dommages aux extrémités du rouleau lors de l'enduction ou du collage superficiel de papier ou de matériau en bande similaire
AT830U1 (de) * 1995-07-03 1996-06-25 Voith Ag J M Luftmesserstreichaggregat
EP0881330A2 (fr) * 1997-05-27 1998-12-02 Voith Sulzer Papiermaschinen Gesellschaft mbH Procédé et dispositif pour enduire un matériau fluide ou pâteux sur une bande en mouvement
DE19800955A1 (de) * 1998-01-13 1999-07-15 Voith Sulzer Papiertech Patent Vorrichtung zum Auftragen eines flüssigen oder pastösen Auftragsmediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
WO1999060210A1 (fr) * 1998-05-20 1999-11-25 Valmet Corporation Appareil applicateur et procede de revetement par transfert de film
US6309463B1 (en) * 1998-01-13 2001-10-30 Voith Sulzer Papiertechnik Patent Gmbh Device for direct or indirect application of liquid or viscous coating medium onto a moving material web
DE10245074A1 (de) * 2002-09-27 2004-04-01 Voith Paper Patent Gmbh Rakeleinrichtung
JP2004128214A (ja) * 2002-10-02 2004-04-22 Sharp Corp 回転塗布装置および回転塗布方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9001303A (nl) 1990-06-08 1992-01-02 Knp Papier Bv Inrichting en werkwijze voor het voorkomen van aangroei op het afstrijkorgaan van een papierstrijkmachine.
DE29612843U1 (de) 1996-07-24 1996-09-26 Voith Sulzer Papiermasch Gmbh Auftragwerk zum direkten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0380427A2 (fr) * 1989-01-27 1990-08-01 Measurex Corporation Dispositif de contrôle du lissage dans le sens transversal et son procédé d'application
EP0603145A1 (fr) * 1992-12-15 1994-06-22 Valmet Paper Machinery Inc. Procédé et équipement d'enduction d'un rouleau d'une presse encolleuse à film
EP0617167A1 (fr) * 1993-03-25 1994-09-28 Valmet Paper Machinery Inc. Méthode et équipement pour limiter la largeur d'enduction et/ou pour prévenir les dommages aux extrémités du rouleau lors de l'enduction ou du collage superficiel de papier ou de matériau en bande similaire
AT830U1 (de) * 1995-07-03 1996-06-25 Voith Ag J M Luftmesserstreichaggregat
EP0881330A2 (fr) * 1997-05-27 1998-12-02 Voith Sulzer Papiermaschinen Gesellschaft mbH Procédé et dispositif pour enduire un matériau fluide ou pâteux sur une bande en mouvement
DE19800955A1 (de) * 1998-01-13 1999-07-15 Voith Sulzer Papiertech Patent Vorrichtung zum Auftragen eines flüssigen oder pastösen Auftragsmediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
US6309463B1 (en) * 1998-01-13 2001-10-30 Voith Sulzer Papiertechnik Patent Gmbh Device for direct or indirect application of liquid or viscous coating medium onto a moving material web
WO1999060210A1 (fr) * 1998-05-20 1999-11-25 Valmet Corporation Appareil applicateur et procede de revetement par transfert de film
DE10245074A1 (de) * 2002-09-27 2004-04-01 Voith Paper Patent Gmbh Rakeleinrichtung
JP2004128214A (ja) * 2002-10-02 2004-04-22 Sharp Corp 回転塗布装置および回転塗布方法

Also Published As

Publication number Publication date
DE102007027817A1 (de) 2008-12-18
EP2158044A1 (fr) 2010-03-03
JP3165023U (ja) 2011-01-06

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