EP0431431B1 - Dispositif de racle - Google Patents

Dispositif de racle Download PDF

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Publication number
EP0431431B1
EP0431431B1 EP90122497A EP90122497A EP0431431B1 EP 0431431 B1 EP0431431 B1 EP 0431431B1 EP 90122497 A EP90122497 A EP 90122497A EP 90122497 A EP90122497 A EP 90122497A EP 0431431 B1 EP0431431 B1 EP 0431431B1
Authority
EP
European Patent Office
Prior art keywords
doctoring
channel
spring leaf
doctoring device
oscillator
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
EP90122497A
Other languages
German (de)
English (en)
Other versions
EP0431431A3 (en
EP0431431A2 (fr
Inventor
Hans-Peter Dr. Sollinger
Zygmunt Madrzak
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT90122497T priority Critical patent/ATE91243T1/de
Publication of EP0431431A2 publication Critical patent/EP0431431A2/fr
Publication of EP0431431A3 publication Critical patent/EP0431431A3/de
Application granted granted Critical
Publication of EP0431431B1 publication Critical patent/EP0431431B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05C11/04—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
    • B05C11/041—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 characterised by means for positioning, loading, or deforming the blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • 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

Definitions

  • the invention relates to a doctor device according to the preamble of claim 1.
  • a doctor device is known from US-PS 43 69 731.
  • Fig. 1 the doctor device with 1 and the roller C is identified, the direction of movement of the surface of the roller is indicated by the thick arrow.
  • the squeegee device is located on a carrier 8, which has in its upper part a stop 6 for the leaf spring serving here as a doctor blade 2, which is shown here in dash-dotted lines because it should not be present in the cleaning state of the squeegee clamping shown.
  • the doctor blade is pressed against the stop 6 by means of the slide plate 5.
  • This slide plate 5 is provided in the upper part of a groove 3, which extends parallel to the stop 6 and the doctor blade 2.
  • the doctor blade is pressed by a pressure bar 12 against the counter roller C by means of a lifting device, of which only the lifting rod 14 and the fastening plate 15 are shown here.
  • An upper guide plate 13 is provided for guiding the pressure bar 12.
  • vibration pulse elements 7 In the side wall 19 opposite the stop 6 as the preferred location of the channel 3 there are a plurality of vibration pulse elements 7 in a row parallel to this.
  • the electrical connections for these are located in a channel 11 which also runs parallel to the channel 3.
  • the cables are indicated here at 16.
  • the vibration elements 7 are essentially flush with the side wall 19 of the channel 3 and are covered by a vibration plate (membrane) 9.
  • a vibration plate 9 can be provided for each vibration element 11.
  • These oscillation pulse exciters can preferably operate on a piezo-electric basis, in which case they are practically designed as small round cylinders which can be inserted and glued into corresponding cylindrical channels 18. In this case, vibration plates 9 may not be necessary at all.
  • vibration exciters e.g. Ultrasonic transmitter 7
  • a bar 20 which is displaceable parallel to the channel 3 and to move this bar back and forth during the cleaning process, so that the entire seating area of the coating blade is sonicated.
  • the knife gate valve 5 is withdrawn as shown and the channel 3 e.g. filled with water. If the vibration exciters are set into vibrations, preferably at an ultrasonic frequency, the dirt particles which have become lodged in the trough and in particular on the pressing edge of the knife gate valve 5 and the stop 6 are detached. You can flush them away by continuously pouring water into the channel. In order to keep the water in the channel, it is of course closed off at both ends, that is to say in the region of the two ends of the roller C, by closure plates. You can provide these closure plates with connections for the water. At least one of these end plates can also be designed as a flap, which seals by means of a rubber seal on the end channel wall.
  • cleaning is also possible during operation, i.e. while coating with an existing doctor blade. This could also be relatively useful, because it may not lead to larger attachments in the seating area of the coating blade.
  • doctor element be a doctor blade, but it can also serve as such a roller doctor guided in a doctor bed, which is held by a blade-like holder.
  • This blade-like holder e.g. a leaf spring can be fixed in a blade holder as shown.
  • FIG. 2 shows an arrangement with an oscillator 21, which is designed as a rod with a circular cross section, which is located along the entire longitudinal extent of the doctor channel 3 '. Its length also corresponds essentially to the length of the doctor blade or a leaf spring holding the doctor blade bed. Otherwise, similar components to those in FIG. 1 are identified in the figure with the same reference numerals but with an apostrophe.
  • the vibrator 21 is supported over its length by bearing blocks 22 made of a plastic, such as polyurethane. These points should preferably be located at the vibration nodes of the vibration of the rod, which is generated by a vibration exciter 27, 28, which is coupled to the end face and is mounted on a bracket 31. Rod 21 and vibration exciter can also perform a transverse movement, i.e.
  • a connection for the liquid, in particular water, is indicated as a pipe connection 25, the central opening of which continues via the space 24 and the channel 23 into the doctor channel 3 '.
  • Several such connections can be arranged distributed over the length of the doctor channel 3 '.
  • the oscillation frequencies can be between 20 and 80 kHz.
  • a vibration exciter can also be coupled to both ends of the rod-shaped vibrator.
  • An element 27 with magnetostriction which is connected to the oscillator 21 via a coupling piece 28 (so-called booster) for adjusting the amplitude, can be used as a vibration exciter.
  • Separation joints (not shown) with flange and connecting screws and / or gluing to both ends of the coupling piece can be provided.
  • a seal bushing for the vibrator is provided in the end wall 26 of the doctor channel 3 ', the seal 30 being pressed on by means of glasses 29.
  • the vibration exciter can also be fixed on the holding flange 32.
  • the vibration exciter is sold by Martin Walter, Ultrasoundtechnik GmbH, Erlenweg 14, Postfach 1246, D-7516 Karlsbad-Auerbach.

Landscapes

  • Coating Apparatus (AREA)
  • Soil Working Implements (AREA)
  • Cleaning In General (AREA)
  • Massaging Devices (AREA)
  • Glass Compositions (AREA)
  • Confectionery (AREA)
  • Peptides Or Proteins (AREA)
  • Saccharide Compounds (AREA)
  • Cereal-Derived Products (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Eye Examination Apparatus (AREA)
  • Polarising Elements (AREA)
  • Soy Sauces And Products Related Thereto (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Accessories For Mixers (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Centrifugal Separators (AREA)

Claims (9)

  1. Dispositif de racle, comprenant un siège pour un ressort à lame (2) servant d'élément de racle, ou relié à un tel élément, et agencé de façon à pouvoir être serré, dans sa zone éloignée de l'arête d'enduction de l'élément de racle, au moyen d'un élément de serrage (5, 5') qui applique ce ressort à lame contre une butée (6), caractérisé en ce que, dans la zone de serrage, il est prévu une gouttière (3, 3') parallèle à ladite arête d'enduction et située à l'endroit du siège du ressort à lame (2) et en ce que, ou bien une série d'émetteurs d'impulsions oscillatoires (7) est disposée, s'étendant le long de la gouttière (3), dans une paroi (19) de cette gouttière (3) qui est éloignée du ressort à lame (2), ou bien il est prévu, à l'intérieur de la gouttière (3'), un dispositif oscillant (21), en forme de tige et d'une longueur correspondante, auquel est accouplé, sur l'une de ses faces frontales ou sur les deux, un émetteur d'impulsions oscillatoires (27).
  2. Dispositif de racle suivant la revendication 1, caractérisé en ce que l'élément de serrage du ressort à lame (2) est constitué par une plaque-poussoir (5, 5') qui est disposée pratiquement dans la partie supérieure de la gouttière (3, 3').
  3. Dispositif de racle suivant l'une des revendications 1 ou 2, caractérisé en ce que, comme émetteur d'impulsions oscillatoires (7, 27), il est prévu des éléments piézo-électriques ou des éléments à magnétostriction présentant une fréquence émettrice comprise entre 20 et 80 kHz.
  4. Dispositif de racle suivant l'une des revendications 1 à 3, caractérisé en ce que les émetteurs d'impulsions oscillatoires (7) sont disposés dans une barre (20) située en regard de la butée (6) et pouvant être déplacée suivant un mouvement de va-et-vient parallèlement à la gouttière (3).
  5. Dispositif de racle suivant la revendication 4, caractérisé en ce que les émetteurs d'impulsions oscillatoires (7) sont recouverts par une ou plusieurs tôles oscillantes (9).
  6. Dispositif de racle suivant l'une des revendications 1 à 3, caractérisé en ce que l'élément oscillant (21) en forme de tige est constitué d'un métal à module d'élasticité plus élevé, tel que le titane.
  7. Dispositif de racle suivant l'une des revendications 1 à 3 ou 6, caractérisé en ce que l'élément oscillant (21) en forme de tige est agencé de façon à pouvoir être déplacé suivant un mouvement de va-et-vient suivant la direction de son axe longitudinal.
  8. Dispositif de racle suivant l'une des revendications 1 à 3, 6 ou 7, caractérisé en ce que l'élément oscillant (21) en forme de tige prend appui, en au moins certains emplacements de ses noeuds d'oscillation, sur des paliers (22) qui sont réalisés en une matière plastique, telle que polyuréthanne.
  9. Procédé de mise en oeuvre d'un dispositif d'enduction, caractérisé en ce qu'on nettoie le siège de la lame d'enduction ou du support de racle au moyen d'une masse de liquide mise sous une fréquence d'ultrasons.
EP90122497A 1989-12-07 1990-11-26 Dispositif de racle Expired - Lifetime EP0431431B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90122497T ATE91243T1 (de) 1989-12-07 1990-11-26 Rakeleinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3940450A DE3940450A1 (de) 1989-12-07 1989-12-07 Rakeleinrichtung
DE3940450 1989-12-07

Publications (3)

Publication Number Publication Date
EP0431431A2 EP0431431A2 (fr) 1991-06-12
EP0431431A3 EP0431431A3 (en) 1991-11-27
EP0431431B1 true EP0431431B1 (fr) 1993-07-07

Family

ID=6394982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122497A Expired - Lifetime EP0431431B1 (fr) 1989-12-07 1990-11-26 Dispositif de racle

Country Status (10)

Country Link
US (1) US5136967A (fr)
EP (1) EP0431431B1 (fr)
JP (1) JP2920784B2 (fr)
AT (1) ATE91243T1 (fr)
BR (1) BR9006269A (fr)
CA (1) CA2031705A1 (fr)
DE (2) DE3940450A1 (fr)
ES (1) ES2043221T3 (fr)
FI (1) FI106102B (fr)
NO (1) NO174659C (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1526446A3 (fr) 1991-07-08 2007-04-04 Seiko Epson Corporation Architecture RISC extensible de microprocesseur
DE4433048A1 (de) * 1994-09-16 1996-03-21 Tzn Forschung & Entwicklung Verfahren und Vorrichtung zum kontinuierlichen Aufbringen einer Beschichtung auf eine Materialbahn
US6316060B1 (en) 1996-08-20 2001-11-13 Pacifica Papers Inc. Metering coatings
DE29617829U1 (de) * 1996-10-14 1997-01-23 Voith Sulzer Papiermasch Gmbh Auftragseinrichtung zum Auftragen eines Streichmediums
DE19729663A1 (de) * 1997-07-11 1999-01-14 Voith Sulzer Papiermasch Gmbh Rakelvorrichtung
US6564711B1 (en) * 2000-10-30 2003-05-20 Xerox Corporation Ultrasonic cleaner and toner agglomerate disperser for liquid ink development (LID) systems using second sound
AU2002227451A1 (en) * 2000-11-10 2002-05-21 Chipwrights Design, Inc. Method and apparatus for reducing branch latency
WO2004052562A1 (fr) * 2002-12-06 2004-06-24 Stora Enso North America Corp. Coucheuse a temps de contact court utilisant des baguettes soniques
DE102004040622A1 (de) * 2004-08-21 2006-02-23 Voith Paper Patent Gmbh Rakelvorrichtung
JP6876701B2 (ja) * 2015-12-09 2021-05-26 ビーエーエスエフ コーポレーション 担体を溶液でコーティングするためのシステム及び方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE937683C (de) * 1951-01-27 1956-01-12 Voith Gmbh J M Verfahren und Vorrichtung zum Reinigen von Maschinen oder Maschinenteilen
GB779425A (en) * 1954-08-06 1957-07-17 Lodding Engineering Corp Improvements in or relating to methods of and apparatus for removing lint from roll doctor
DE1094761B (de) * 1957-03-21 1960-12-15 Westfalendruck G M B H & Co Ko Rakelvorrichtung an Druckmaschinen
DE1126837B (de) * 1958-07-16 1962-04-05 Gillet Thaon Ets Gillet & Fils Rakelvorrichtung fuer Walzen, insbesondere fuer die Druckwalzen einer Gewebedruckmaschine
US3359940A (en) * 1965-09-17 1967-12-26 Beloit Corp Blade holding mechanism for coaters
US3882817A (en) * 1974-01-11 1975-05-13 Black Clawson Co Doctor Blade Assembly
DE2815388C3 (de) * 1978-04-10 1981-06-11 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Waschen von Zylindern an Druckmaschinen, insbesondere Offsetdruckmaschinen
DE2825907B2 (de) * 1978-06-13 1981-02-26 Jagenberg-Werke Ag, 4000 Duesseldorf Vorrichtung zum Aufbringen einer Beschichtung auf eine Materialbahn
DE2951649C2 (de) * 1979-12-21 1982-11-18 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbkasten von Druckmaschinen
DE3027533C2 (de) * 1980-07-21 1986-05-15 Telsonic Aktiengesellschaft für elektronische Entwicklung und Fabrikation, Bronschhofen Verfahren zur Erzeugung und Abstrahlung von Ultraschallenergie in Flüssigkeiten sowie Ultraschallresonator zur Ausführung des Verfahrens
US4369731A (en) * 1981-09-02 1983-01-25 Consolidated Papers, Inc. Coating apparatus having an internal leveling blade
DE3220845C2 (de) * 1982-06-03 1985-02-21 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Antrieb einer Rakeleinrichtung
US4716829A (en) * 1985-02-11 1988-01-05 American Can Company Method for removing solids from substrates and preventing solids build-up thereon
DE3728771A1 (de) * 1987-08-28 1989-03-09 Henkel Kgaa Verbessertes verfahren zur ultraschall-reinigung von festen formteilen

Also Published As

Publication number Publication date
EP0431431A3 (en) 1991-11-27
NO174659C (no) 1994-06-15
ATE91243T1 (de) 1993-07-15
FI106102B (fi) 2000-11-30
US5136967A (en) 1992-08-11
DE59001916D1 (de) 1993-08-12
NO905144L (no) 1991-06-10
DE3940450A1 (de) 1991-06-13
EP0431431A2 (fr) 1991-06-12
NO174659B (no) 1994-03-07
JPH03186378A (ja) 1991-08-14
NO905144D0 (no) 1990-11-28
CA2031705A1 (fr) 1991-06-08
ES2043221T3 (es) 1993-12-16
JP2920784B2 (ja) 1999-07-19
BR9006269A (pt) 1991-09-24
FI906027A (fi) 1991-06-08
FI906027A0 (fi) 1990-12-05

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