EP0667414B1 - Rakelvorrichtung - Google Patents

Rakelvorrichtung Download PDF

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Publication number
EP0667414B1
EP0667414B1 EP94120634A EP94120634A EP0667414B1 EP 0667414 B1 EP0667414 B1 EP 0667414B1 EP 94120634 A EP94120634 A EP 94120634A EP 94120634 A EP94120634 A EP 94120634A EP 0667414 B1 EP0667414 B1 EP 0667414B1
Authority
EP
European Patent Office
Prior art keywords
doctor
doctor blade
holder
blade
grooves
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.)
Expired - Lifetime
Application number
EP94120634A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0667414A1 (de
Inventor
Zygmunt Madrzak
Bernd Kaufmann
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 Sulzer Papiermaschinen GmbH
Original Assignee
Voith Sulzer Papiermaschinen 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 Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0667414A1 publication Critical patent/EP0667414A1/de
Application granted granted Critical
Publication of EP0667414B1 publication Critical patent/EP0667414B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades
    • 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
    • B05C11/04—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 blades

Definitions

  • the invention relates to a doctor device according to the preamble of claim 1.
  • a doctor device is known from the DE-OS 2822682.
  • This is a so-called doctor blade, one of which End edge (longitudinal edge) forms the dosing or smoothing edge, movable in the holder clamped. It can be designed as a long band to be passed through a Movement along the surface of the counter roll guiding the paper web to experience a constant change in their field of work.
  • DE-A-36 05 409 shows a coating device for application mass, in which there is a beam deflector in front of the narrowest point of the press nip, which is generally designed as a plate-like or bowl-shaped element.
  • DE-A-39 31 793 relates to a device for coating a moving web with a support element.
  • the device according to EP-A-0 109 520 is a metering system for coating slip for coating webs of paper or cardboard with a holder, in which a doctor bar is held in a guide groove.
  • the squeegee strip is designed to be slightly flexible in that it has numerous parallel incisions on its rear side, so that a type of comb strip is formed.
  • the actual doctor surface is convex and ends in an abrupt edge, which is a main feature of this device.
  • the working surface of the squeegee is smooth and, due to the abrupt trailing edge, is not suitable for being grooved to enable volumetric dosing.
  • the squeegee is a relatively expensive element, which is disadvantageous when it is replaced several times.
  • the object of the invention is to provide a doctor blade device which is very is universally applicable, has a long service life when worn and also is relatively inexpensive to manufacture.
  • doctor element is leaf-shaped, it can very be produced inexpensively. It provides also great variation options, e.g. a Provides pressurization on the concave side so that you can change the curvature of the doctor blade. On the other hand, you can also use the doctor blade as a very long one Run squeegee tape on both sides of the Working area arranged drums can wind up. At low feed during the work process can Wear very evenly over the entire length of the belt are kept, so that a very long life of the Doctor blade results. Since the doctor blade in the initial state flat, the elevations (or the grooves in between) for volumetric Dosage of the coating slip can be created.
  • the doctor blade 2 in a holder 4 - with their corresponding length - by projections 14 and 15 the same clamped or clamped so that the Curvature - convex curvature of the work surface 16 - through the Clamping results.
  • Doctor blade In the manufacturing state it is Doctor blade just. It has curvatures 12 and intermediate grooves 13 transverse to its longitudinal axis, around the coating slip according to the cross section of the grooves 13 dosed volumetrically.
  • the entire squeegee device is designated 1, and from Figure 2 is their attachment recognizable in the coating device in which the Material web B from a counter roll 11 with a roll core Steel and a rubber coating 14 is guided.
  • the doctor device At both Ends of the doctor device are winding drums 25 and 26 provided, in which case a drive motor 35 is arranged, the transmission via the articulated rod 40 20 and thus drives the take-up drum 25.
  • the case is a very long squeegee belt 2 still over deflection rollers 18 and 19 guided, which are held on boom arms 38, so the squeegee tape outside of the actual Working area from the curved shape to the straight or stretched form.
  • the doctor blade 2 again in the opposite direction, as through the arrows marked can be used by also a corresponding drive for the winding drum 26 as provided for the drum 25.
  • the doctor device 1 is held on a doctor bar 21, which has a Slide guide 29 according to the double arrow on the counter roller 11 is adjustable.
  • FIG. 1 A variant is shown in principle in FIG which the doctor blade 2 through a variable curvature can receive a pressure hose 8, which in the room 5th is provided. You could theoretically also be in room 5 below the overpressure of a pressure medium liquid or gaseous kind put, however, at the ends of the doctor blade Sealing problems occur. One would have to find suitable ones there Install rubber seals. In this case, the holder 4 ' Projections 61 and 62 for holding the pressure hose 8 on.
  • the production of the projections (elevations) 12 and the intermediate grooves 13 is by sintering or more modern processes such as PVD (physical vapor deposition) or CVD (chemical vapor deposition) possible.
  • Figure 1 is also indicated that grooves 13 'in the Can cut doctor blade 2 'by means of a laser device, if you want to make very fine grooves, the same applies for the production by means of high pressure water jets. It production by milling is of course also possible.
  • the doctor blade 2 ′′ also completely smooth, especially with a smooth work surface can be trained in case you don't dosed volumetrically but hydrodynamically.
  • doctor blade itself from one Form plastic and only the application layer wear-resistant material, such as carbides or oxides, produce, provided that the anchorage is sufficiently firm wear-resistant material reached on the doctor blade can be.
  • application layer wear-resistant material such as carbides or oxides
  • the curvature of the doctor blade can be chosen so that maximum deflection (maximum distance from the tendon drawn through the ends of the doctor blade) between 0.1 and 0.4 mm per mm width or height of the doctor blade results.
  • the doctor blades are generally wide (Height) between 60 and 120 mm in the not bent, so in new condition.
  • the squeegee blade has 2 or squeegee strips, 5 - 43 according to FIG. 5 - also at an angle to the Longitudinal edges of the doctor blade or tape run or intersecting grooves (or narrow protrusions) 43 '' and 43 '' 6 can also be provided. 7 can the grooves 44 or elevations - also regularly or - seen at least over the whole sheet - regularly - be interrupted.
  • Fig. 10 shows Grooves or elevations in the form of crosses and according to FIG. 11 the grooves 45 or elevations run in a zigzag shape.

Landscapes

  • Coating Apparatus (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Saccharide Compounds (AREA)
  • Medicinal Preparation (AREA)
  • Paper (AREA)
  • Polarising Elements (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Seal Device For Vehicle (AREA)
EP94120634A 1994-01-27 1994-12-24 Rakelvorrichtung Expired - Lifetime EP0667414B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4402226A DE4402226C2 (de) 1994-01-27 1994-01-27 Rakelvorrichtung
DE4402226 1994-01-27

Publications (2)

Publication Number Publication Date
EP0667414A1 EP0667414A1 (de) 1995-08-16
EP0667414B1 true EP0667414B1 (de) 1998-03-04

Family

ID=6508721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120634A Expired - Lifetime EP0667414B1 (de) 1994-01-27 1994-12-24 Rakelvorrichtung

Country Status (7)

Country Link
US (1) US5536312A (ja)
EP (1) EP0667414B1 (ja)
JP (1) JP2997990B2 (ja)
AT (1) ATE163700T1 (ja)
CA (1) CA2141284A1 (ja)
DE (2) DE4402226C2 (ja)
FI (1) FI108116B (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011007305A1 (de) 2011-04-13 2012-10-18 Voith Patent Gmbh Rakelvorrichtung
DE102012202836A1 (de) 2012-02-24 2013-08-29 Voith Patent Gmbh Rakelelement

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19532388C1 (de) * 1995-09-01 1996-12-19 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
US5713276A (en) * 1995-09-22 1998-02-03 Motorola, Inc. Flexible self-level squeegee blade
US5905513A (en) * 1995-10-20 1999-05-18 Lexmark International, Inc. Ink jet printhead body having wiper cleaning zones located on both sides of printhead
FR2746704B1 (fr) * 1996-03-29 1998-05-22 Fimor Tete de raclage, notamment pour serigraphie
DE19642198C2 (de) * 1996-10-12 1999-11-04 Rieter Ingolstadt Spinnerei Putzlippe
US5802947A (en) 1996-10-15 1998-09-08 Credo Tool Company Dimpled circular saw blade
SE507926C2 (sv) * 1996-12-19 1998-07-27 Btg Kaelle Inventing Ab Bestrykningsblad för beläggning av en löpande bana
US6155167A (en) * 1999-01-21 2000-12-05 Meyer; Rolf Printing doctor with a coating of hard material and method for producing same
EP1265713B1 (en) * 1999-11-26 2004-02-25 JohnsonDiversey, Inc. Applicator for applying a fluid to a surface and method of applying a fluid to a surface
US6932811B2 (en) * 2000-04-27 2005-08-23 Atricure, Inc. Transmural ablation device with integral EKG sensor
DE10214392A1 (de) * 2002-03-30 2003-10-16 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Betreiben einer Schaberklinge
US20030217655A1 (en) * 2002-05-22 2003-11-27 Max Daetwyler Corp Doctor blade system and method
US20030226579A1 (en) * 2002-06-06 2003-12-11 Carrier Gordon Eugene Serrated doctor blades
US7591903B2 (en) * 2002-08-13 2009-09-22 3M Innovative Properties Company Die having multiple orifice slot
FI115654B (fi) * 2003-02-27 2005-06-15 Metso Paper Inc Laitteisto ja menetelmä terän vaihtamiseksi päällystyslaitteella ja päällystyslaitteen terä
US7546802B2 (en) * 2003-07-28 2009-06-16 Goss International Americas, Inc. Fluid supply device for a printing machine
US7331504B2 (en) * 2004-05-20 2008-02-19 Sonoco Development, Inc. Partially adhered tube and methods and apparatus for manufacturing same
DE502005001287D1 (de) * 2004-07-28 2007-10-04 Andritz Kuesters Gmbh & Co Kg Vorrichtung zum Auftrag von Abschnitten von Flotte auf eine laufende Warenbahn
US8474378B1 (en) * 2010-02-23 2013-07-02 Valley Holdings, Llc Chamber blade/sealing assembly for a printing press
DE102012001956A1 (de) * 2012-02-02 2013-08-08 Olbrich Gmbh Beschichtungssystem für flexible Bahnen
DE102013209963A1 (de) * 2013-05-28 2014-12-18 Siemens Aktiengesellschaft Anordnung zum Aufrakeln eines Pulvers
CN111364287B (zh) * 2020-04-26 2021-04-09 卢俊超 一种纸张熟化处理设备

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2822682A1 (de) * 1978-05-24 1979-11-29 Feldmuehle Ag Vorrichtung und verfahren zum kontinuierlichen egalisieren des striches beim beschichten von laufenden materialbahnen
US4757763A (en) * 1979-04-19 1988-07-19 Baldwin Technology Corporation Automatic blanket cylinder cleaner
EP0109520B1 (de) * 1982-11-23 1987-12-02 JAGENBERG Aktiengesellschaft Vorrichtung zum Beschichten laufender Materialbahnen
DE3338323A1 (de) * 1982-11-23 1984-05-24 Jagenberg AG, 4000 Düsseldorf Vorrichtung zum beschichten laufender materialbahnen
DE3605409C3 (de) * 1986-02-20 1996-07-04 Voith Gmbh J M Einrichtung zur Beschichtung laufender Warenbahnen
JPH07103519B2 (ja) * 1988-09-22 1995-11-08 富士写真フイルム株式会社 ロール表面クリーニング装置
SE467528B (sv) * 1988-09-27 1992-08-03 Btg Kaelle Inventing Ab Anordning foer bestrykning av en loepande bana
DE3934418A1 (de) * 1989-10-14 1991-04-18 Voith Gmbh J M Rakel
US5282420A (en) * 1992-09-28 1994-02-01 Baldwin Printing Controls Limited Apparatus for cleaning printing machine cylinder or the like
DE4242582C2 (de) * 1992-12-16 1998-03-19 Sebald U E Rakelanordnung
DE4340578C2 (de) * 1993-11-29 1995-03-30 Voith Gmbh J M Rakel zum Beschichten von Bahnen aus Papier oder Karton

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011007305A1 (de) 2011-04-13 2012-10-18 Voith Patent Gmbh Rakelvorrichtung
DE102012202836A1 (de) 2012-02-24 2013-08-29 Voith Patent Gmbh Rakelelement

Also Published As

Publication number Publication date
FI108116B (fi) 2001-11-30
DE4402226C2 (de) 1997-11-06
DE4402226A1 (de) 1995-08-03
CA2141284A1 (en) 1995-07-28
JP2997990B2 (ja) 2000-01-11
FI950384A (fi) 1995-07-28
ATE163700T1 (de) 1998-03-15
US5536312A (en) 1996-07-16
FI950384A0 (fi) 1995-01-27
DE59405389D1 (de) 1998-04-09
EP0667414A1 (de) 1995-08-16
JPH0833862A (ja) 1996-02-06

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