EP0427924A2 - Rouleau racleur pour le dosage volumétrique d'un matériau d'enduction - Google Patents

Rouleau racleur pour le dosage volumétrique d'un matériau d'enduction Download PDF

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Publication number
EP0427924A2
EP0427924A2 EP90115282A EP90115282A EP0427924A2 EP 0427924 A2 EP0427924 A2 EP 0427924A2 EP 90115282 A EP90115282 A EP 90115282A EP 90115282 A EP90115282 A EP 90115282A EP 0427924 A2 EP0427924 A2 EP 0427924A2
Authority
EP
European Patent Office
Prior art keywords
elevations
doctor rod
doctor
rod according
microns
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.)
Withdrawn
Application number
EP90115282A
Other languages
German (de)
English (en)
Other versions
EP0427924A3 (en
Inventor
Reinhard Knop
Ulrich Dr. Höke
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.)
Jagenberg AG
Original Assignee
Jagenberg AG
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 Jagenberg AG filed Critical Jagenberg AG
Publication of EP0427924A2 publication Critical patent/EP0427924A2/fr
Publication of EP0427924A3 publication Critical patent/EP0427924A3/de
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • D21H23/58—Details thereof, e.g. surface characteristics, peripheral speed

Definitions

  • the invention relates to a doctor rod for volumetric metering of coating material, especially on running paper or cardboard webs, according to the preamble of claim 1 and a device for coating running material webs with a doctor rod as a metering element.
  • Raktelstangen serve to apply a metered film of paint or glue to the web to be coated, the amount of coating material applied can be influenced over the groove cross section.
  • the doctor rod is either used directly on the web, that is, the coating material is applied in excess with an upstream applicator, then the doctor rod is metered to the desired application weight, or it is first metered onto a roller, which then Releases coating material to the web in a nip.
  • the web is guided through the press nip between two rollers, an applicator with a subsequent doctor rod being arranged on one or both rollers in the area not wrapped by the web.
  • doctor rods are known from DE-OS 37 35 889 and DE-GM 84 14 413.
  • the doctor rod rests directly on the paper web, in the latter it is used to apply a film to a roller, which then delivers the coating material to the web in a nip.
  • knob-shaped elevations on the outer surface of the doctor rod. This can be done by incorporating recesses in a cylindrical rod, e.g. B. be created by etching, milling, grinding, pressing, etc.
  • the knobs or the entire doctor rod are made of low-wear materials, e.g. B. formed from hard metals, hard chrome-plated steel, glass or oxide ceramic materials.
  • the invention has for its object to provide a doctor rod with which streak-free low application weights can be achieved without damage to the roller surface when applied to a roller.
  • Fig. 1 shows a doctor bar according to the invention in a partially sectioned representation.
  • the squeegee rod shown in sections consists of a cylindrical base body 1 in the form of a smooth rod, in on depressions were incorporated into the entire lateral surface using a removal process, so that the remnants of the original cylindrical lateral surface form a multiplicity of elevations 2 on the outer surface of the doctor rod.
  • the surfaces of the elevations 2 are therefore flat and all lie in a cylindrical envelope surface which corresponds to the lateral surface of the original cylindrical rod.
  • the doctor rod according to the invention is preferably manufactured in such a way that a steel rod is first coated in a wear-resistant manner, preferably with oxide ceramic, and then polished. A laser beam is then used to burn indentations into the surface, the coating material evaporating at the processed areas without residue and burrs.
  • bars with hardened and polished metal surfaces can be used, into which the recesses are worked using diamond tools or by etching.
  • the surface structure can also be created in such a way that elevations are applied to a rod, the surface of which is subsequently grinded, polished or the like. are processed so that they are flat and lie in a cylindrical envelope surface.
  • the bar shown only partially in FIG. 1 has a diameter of 6 mm to 20 mm, its length corresponds to the working width of a coating device, which can be up to 10 m.
  • the sum of the surfaces of the elevations is 10% to 50% of the cylindrical envelope surface. Therefore, 50% to 90% of the original surface area was removed.
  • the surface was processed in such a way that it has a profile depth P t (2.5 mm) according to DIN 4771 between 30 ⁇ m and 150 ⁇ m.
  • the doctor rod is measured in the axial direction. Within the tread depth varies only slightly. The deviation of the profile depths determined for individual measurements from the average profile depth is max. 5 00.
  • a good detachment of the coating material from the doctor rod is achieved if the surface roughness depth R t of the flanks of the elevations is less than 10% of the value of P t (2.5 mm).
  • the elevations 2 have an elongated shape in plan and are aligned approximately circumferentially. Their length in the circumferential direction is preferably between 1 mm and 15 mm and their width b in the axial direction between 10 ⁇ m and 100 ⁇ m. In certain applications, it may be advantageous to design the elevations continuously over the entire circumference.
  • the distance a of the elevations 2 from one another is between 150 ⁇ m and 400 ⁇ m.
  • the geometric dimensions and the arrangement of the elevations 2 vary randomly distributed within certain limits.
  • the range of variation for the width b measured in the axial direction is between 10 ⁇ m and 100 ⁇ m and the range of variation for the distances a is between 150 ⁇ m and 400 ⁇ m.
  • the doctor rod has elongated elevations which are aligned essentially in the circumferential direction.
  • the deviation of their longitudinal axis from the circumferential direction, the angle of inclination ⁇ in FIG. 1, is a maximum of 100.
  • the angle of inclination ⁇ of the elevations 2 can also vary randomly distributed within this limit.
  • the open cross-sectional area between the elevations 2 on one side of a central longitudinal section through the doctor rod is between 15 mm2 and 80 mm2 per meter of doctor rod length.
  • a preferred area of application of the doctor rod according to the invention is coating devices which apply glue or pigment inks indirectly to a paper web via a roller. These coating devices have two press rollers, through the gap of which the paper web is guided.
  • a known applicator e.g. B. arranged a nozzle or roller applicator with a subsequent metering system in the direction of rotation, which contains a doctor rod according to the invention as a metering element.
  • the doctor rod is mounted in an elastic holder and driven in the opposite direction to the press roller.
  • Such coating devices are described in detail in DE-GM 84 14 413.
  • a particularly advantageous holder for the doctor rod describes DE-PS 30 22 955.
  • the doctor rods according to the invention are also suitable for use in coating devices in which metering is carried out directly on the paper or cardboard web. These coating devices have a counter roller around which the paper or cardboard web is guided.
  • An application unit e.g. B. a roller or nozzle applicator, arranged, the coating material in excess on the web carries directly on.
  • a metering element follows in the web running direction behind the applicator, which scrapes off the excess coating material from the web to the desired coat weight.
  • elastically mounted smooth doctor rods are known, such as. B. described in DE-PS 30 22 955. Instead of these smooth doctor rods, a doctor rod according to the invention can advantageously be used.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
EP19900115282 1989-11-14 1990-08-09 Doctor roll for the volumetric dosing of a coating material Withdrawn EP0427924A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3937749 1989-11-14
DE19893937749 DE3937749A1 (de) 1989-11-14 1989-11-14 Rakelstange zum volumetrischen dosieren von beschichtungsmaterial

Publications (2)

Publication Number Publication Date
EP0427924A2 true EP0427924A2 (fr) 1991-05-22
EP0427924A3 EP0427924A3 (en) 1991-11-13

Family

ID=6393443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900115282 Withdrawn EP0427924A3 (en) 1989-11-14 1990-08-09 Doctor roll for the volumetric dosing of a coating material

Country Status (6)

Country Link
EP (1) EP0427924A3 (fr)
JP (1) JPH03178366A (fr)
BR (1) BR9005436A (fr)
CA (1) CA2026897A1 (fr)
DE (1) DE3937749A1 (fr)
FI (1) FI905624A0 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0571351A1 (fr) * 1992-05-21 1993-11-24 Valmet Paper Machinery Inc. Dispositif d'enduction pour l'enduction d'un rouleau de presse d'encollage, papier ou carton
EP0626479A1 (fr) * 1993-05-27 1994-11-30 J.M. Voith GmbH Dispositif d'enduction pour l'enduction de bandes en mouvement
WO1996034148A1 (fr) * 1995-04-25 1996-10-31 Macmillan Bloedel Limited Coucheuses a racle rotative
EP1234912A2 (fr) * 2001-02-13 2002-08-28 Mitsubishi Heavy Industries, Ltd. Appareil de couchage et procédé de fabrication de papier couché
EP1520632A2 (fr) 2003-10-02 2005-04-06 Fuji Photo Film Co., Ltd. Barre de couchage et son procédé de fabrication
WO2010136377A1 (fr) * 2009-05-27 2010-12-02 Voith Patent Gmbh Dispositif de racloir
GB2533313A (en) * 2014-12-15 2016-06-22 Airbus Operations Ltd Flowable material applicator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4123326C2 (de) * 1991-07-15 1994-11-17 Horst Sprenger Gmbh Rakelwelle für Streich- und Beschichtungsanlagen sowie für Leim- und Filmpressen
DE19840951A1 (de) 1998-09-08 2000-03-09 Jagenberg Papiertech Gmbh Rakelstange für eine Beschichtungsvorrichtung
TWI461306B (zh) * 2006-07-19 2014-11-21 Boettcher Gmbh & Co Felix 隨機雷射處理之薄膜滾子
JP5175149B2 (ja) * 2007-09-14 2013-04-03 日本製紙株式会社 塗工紙の製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB729561A (en) * 1952-05-19 1955-05-11 Strachan & Henshaw Ltd Improvements in or relating to inking rolls of rotary printing presses
US4664058A (en) * 1985-10-25 1987-05-12 International Paper Company Coating roll surface configuration for applying liquid sterilant to a moving web

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE678130A (fr) * 1965-04-08 1966-09-21
GB1486142A (en) * 1975-03-10 1977-09-21 Wiggins Teape Ltd Coating apparatus
DE3033478C2 (de) * 1980-09-05 1982-12-30 Fa. Johannes Zimmer, 9020 Klagenfurt Foulard mit einer Umschlingungswalze für eine zu behandelnde textile Warenbahn
JPS6089827A (ja) * 1983-10-22 1985-05-20 Konishiroku Photo Ind Co Ltd 塗膜平担化方法及びその装置
DE3703834A1 (de) * 1987-02-07 1988-08-18 Jagenberg Ag Rollschaberauftragwerk zum auftragen von beschichtungen auf materialbahnen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB729561A (en) * 1952-05-19 1955-05-11 Strachan & Henshaw Ltd Improvements in or relating to inking rolls of rotary printing presses
US4664058A (en) * 1985-10-25 1987-05-12 International Paper Company Coating roll surface configuration for applying liquid sterilant to a moving web

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0571351A1 (fr) * 1992-05-21 1993-11-24 Valmet Paper Machinery Inc. Dispositif d'enduction pour l'enduction d'un rouleau de presse d'encollage, papier ou carton
EP0626479A1 (fr) * 1993-05-27 1994-11-30 J.M. Voith GmbH Dispositif d'enduction pour l'enduction de bandes en mouvement
WO1996034148A1 (fr) * 1995-04-25 1996-10-31 Macmillan Bloedel Limited Coucheuses a racle rotative
EP1234912A2 (fr) * 2001-02-13 2002-08-28 Mitsubishi Heavy Industries, Ltd. Appareil de couchage et procédé de fabrication de papier couché
EP1234912A3 (fr) * 2001-02-13 2004-01-14 Mitsubishi Heavy Industries, Ltd. Appareil de couchage et procédé de fabrication de papier couché
EP1520632A2 (fr) 2003-10-02 2005-04-06 Fuji Photo Film Co., Ltd. Barre de couchage et son procédé de fabrication
EP1520632A3 (fr) * 2003-10-02 2008-01-16 FUJIFILM Corporation Barre de couchage et son procédé de fabrication
WO2010136377A1 (fr) * 2009-05-27 2010-12-02 Voith Patent Gmbh Dispositif de racloir
GB2533313A (en) * 2014-12-15 2016-06-22 Airbus Operations Ltd Flowable material applicator

Also Published As

Publication number Publication date
FI905624A0 (fi) 1990-11-13
EP0427924A3 (en) 1991-11-13
DE3937749A1 (de) 1991-05-16
CA2026897A1 (fr) 1991-05-15
BR9005436A (pt) 1991-09-17
JPH03178366A (ja) 1991-08-02

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