EP0431431A2 - Doctoring device - Google Patents

Doctoring device Download PDF

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Publication number
EP0431431A2
EP0431431A2 EP90122497A EP90122497A EP0431431A2 EP 0431431 A2 EP0431431 A2 EP 0431431A2 EP 90122497 A EP90122497 A EP 90122497A EP 90122497 A EP90122497 A EP 90122497A EP 0431431 A2 EP0431431 A2 EP 0431431A2
Authority
EP
European Patent Office
Prior art keywords
doctor
channel
rod
leaf spring
blade
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
EP90122497A
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German (de)
French (fr)
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EP0431431A3 (en
EP0431431B1 (en
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
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Filing date
Publication date
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT90122497T priority Critical patent/ATE91243T1/en
Publication of EP0431431A2 publication Critical patent/EP0431431A2/en
Publication of EP0431431A3 publication Critical patent/EP0431431A3/en
Application granted granted Critical
Publication of EP0431431B1 publication Critical patent/EP0431431B1/en
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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 broken 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 work on a piezoelectric 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 that can be moved 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 with an ultrasound 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 node 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)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Cereal-Derived Products (AREA)
  • Confectionery (AREA)
  • Peptides Or Proteins (AREA)
  • Saccharide Compounds (AREA)
  • Glass Compositions (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Soy Sauces And Products Related Thereto (AREA)
  • Polarising Elements (AREA)
  • Eye Examination Apparatus (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Centrifugal Separators (AREA)
  • Accessories For Mixers (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

For the purpose of cleaning a doctoring device 1, a groove 3 is provided on the seat of a blade 2, which groove can be filled with fluid. Vibration pulse elements 7 are present which impact the fluid with ultrasonic frequency. As a result, deposits are cleaned from the seat of the blade. <IMAGE>

Description

Die Erfindung betrifft eine Rakeleinrichtung entsprechend dem Oberbegriff des Patentanspruchs 1. Eine solche Rakeleinrichtung ist bekannt aus der US-PS 43 69 731.The invention relates to a doctor device according to the preamble of claim 1. Such a doctor device is known from US-PS 43 69 731.

Bei diesen Einrichtungen ist es nicht zu verhindern, daß in dem Spalt, in welchem die Streichklinge gegen den sie festlegenden Anschlag gedrückt wird, sich Rückstandsteilchen der Streichmasse festsetzen und dort altern. Sie führen dazu, daß kein einwandfreier Sitz der Streichklinge in ihrer Einspannung mehr gegeben ist. Die Reinigungsmöglichkeiten des Sitzes der Streichklinge sind in solchen Fällen recht schlecht. Es hat sich eine Einrichtung eingebürgert, bei welcher die Streichklinge durch einen pneumatischen Druckschlauch eingespannt wird. Ein Beispiel dafür ist auch die genannte US-Patentschrift. Hierbei sind die Reinigungsmöglichkeiten natürlich noch schlechter. Es ist erwünscht, eine Reinigungsmöglichkeit vorzusehen, daß beim Klingenwechsel in sehr kurzer Zeit die Reinigung des Klingensitzes erfolgen kann.With these devices, it cannot be prevented that residue particles of the coating slip settle in the gap in which the coating blade is pressed against the stop defining it and age there. They result in the streak blade no longer being properly seated in its clamping. In such cases, the cleaning options for the seat of the coating blade are quite poor. A device has been established in which the doctor blade is clamped by a pneumatic pressure hose. An example of this is the aforementioned US patent. The cleaning options are of course even worse. It is desirable to provide a cleaning option so that the blade seat can be cleaned in a very short time when changing the blade.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst.This object is achieved by the features of the characterizing part of patent claim 1.

Nachfolgend wird die Erfindung anhand zweier in der Zeichnung dargestellter Ausführungsbeispiele erläutert, wobei in

Fig.1 u.2
jeweils ein Querschnitt durch die Rakeleinrichtung und in
Fig. 3
eine Teilansicht und -Längsschnitt zu letzterer in verkleinertem Maßstab
dargestellt ist.The invention is explained below using two exemplary embodiments shown in the drawing, wherein in
Fig. 1 and 2
in each case a cross section through the doctor device and in
Fig. 3
a partial view and longitudinal section to the latter on a reduced scale
is shown.

In Fig. 1 ist die Rakeleinrichtung mit 1 und die Walze C gekennzeichnet, wobei die Bewegungsrichtung der Oberfläche der Walze durch den dicken Pfeil gekennzeichnet ist. Die Rakeleinrichtung befindet sich auf einem Träger 8, der in seinem oberen Teil einen Anschlag 6 für die hier als Streichklinge 2 dienende Blattfeder aufweist, die hier strichpunktiert dargestellt ist, weil sie bei dem dargestellten Reinigungszustand der Rakeleinspannung nicht vorhanden sein soll. Zum Betrieb wird die Streichklinge mittels der Schieberplatte 5 gegen den Anschlag 6 gepreßt. Diese Schieberplatte 5 ist in dem oberen Teil einer Rinne 3 vorgesehen, die sich parallel zum Anschlag 6 und zur streichklinge 2 erstreckt.In 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 broken lines because it should not be present in the cleaning state of the squeegee clamping shown. For operation, 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.

Die Streichklinge wird durch eine Druckleiste 12 an die Gegenwalze C mittels einer Hubvorrichtung angepreßt, von der hier nur die Hubstange l4 und die Befestigungsplatte 15 dargestellt sind. Für die Führung der Druckleiste 12 ist eine obere Führungsplatte 13 vorgesehen.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.

In der dem Anschlag 6 gegenüber befindlichen Seitenwand 19 als bevorzugtem Ort der Rinne 3 befinden sich in einer zu dieser parallelen Reihe mehrere Schwingungsimpulselemente 7. Die elektrischen Anschlüsse für diese befinden sich in einem Kanal 11, der ebenfalls parallel zur Rinne 3 verläuft. Die Kabel sind hier bei 16 angedeutet. Die Schwingungselemente 7 schließen hier im wesentlichen bündig mit der Seitenwand 19 der Rinne 3 ab und sind durch eine Schwingungsplatte (Membrane) 9 abgedeckt. Besteht z.B. ein Abstand zwischen den einzelnen Schwingungselementen 11 von etwa 20 cm, so kann man für jedes Schwingungselement 11 eine schwingungsplatte 9 vorsehen. Diese Schwingungsimpulserreger können vorzugsweise auf piezo-elektrischer Basis arbeiten, in welchem Fall sie praktisch als kleine runde Zylinder ausgebildet sind, die in entsprechende zylindrische Kanäle l8 eingesteckt und eingeklebt werden können. Es sind dann u.U. gar keine Schwingungsplättchen 9 nötig.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. For example, if there is a distance between the individual vibration elements 11 of approximately 20 cm, a vibration plate 9 can be provided for each vibration element 11. These oscillation pulse exciters can preferably work on a piezoelectric 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.

Es ist auch möglich, in einem größeren gegenseitigen Abstand die Schwingungserreger, z.B. Ultraschallsender 7, dafür aber in einer parallel zur Rinne 3 verschieblichen Leiste 20 anzuordnen und diese Leiste während des Reinigungsvorganges hin- und herzubewegen, so daß der gesamte Sitzbereich der Streichklinge beschallt wird.It is also possible to place the vibration exciters, e.g. Ultrasonic transmitter 7, but to be arranged in a bar 20 that can be moved 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.

Für den Reinigungsfall wird der Plattenschieber 5 wie dargestellt zurückgezogen und die Rinne 3 z.B. mit Wasser gefüllt. Werden nun die Schwingungserreger in Schwingungen versetzt, vorzugsweise mit Ultraschallfrequenz, so werden die Schmutzteilchen, die sich in der Rinne und insbesondere an der Preßkante des Plattenschiebers 5 und des Anschlages 6 festgesetzt haben, losgelöst. Man kann sie fortspülen, indem man fortlaufend Wasser in die Rinne eingibt. Um das Wasser in der Rinne zu halten, ist diese natürlich an beiden Enden, also im Bereich der beiden Enden der Walze C, durch Verschlußplatten abgeschlossen. Man kann diese Verschlußplatten mit Anschlüssen für das Wasser versehen. Man kann zumindest eine dieser Abschlußplatten auch als Klappe ausführen, welche mittels einer Gummidichtung an der stirnseitigen Rinnenwand abdichtet. Man kann diese Klappe ein wenig lüften, so daß das Reinigungswasser entsprechend der zugegebenen Überschußmenge kontinuierlich abfließen kann. Ist der Reinigungsvorgang beendet, wird kein Wasser mehr zugegeben, eventuell die Abschlußklappe völlig geöffnet, so daß das in der Rinne enthaltene Wasser einschließlich der darin enthaltenen Verunreinigungen abfließt.For cleaning purposes, 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 with an ultrasound 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. You can vent this flap a little so that the cleaning water can flow off continuously in accordance with the excess amount added. When the cleaning process is finished, no more water is added, and the closing flap may be opened completely, so that the water contained in the channel, including the impurities contained therein, flows off.

Unter Umständen ist auch eine Reinigung während des Betriebes, also während des Streichens mit vorhandener Streichklinge möglich. Dies könnte auch relativ sinnvoll sein, weil es dadurch möglicherweise erst gar nicht zu größeren Ansetzungen im Sitzbereich der Streichklinge kommt.Under certain circumstances, 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.

Es ist nicht erforderlich, daß das Rakelelement eine Streichklinge ist, sondern es kann auch als solches eine in einem Rakelbett geführte Rollrakel dienen, welche von einem klingenähnlichen Halter gehalten wird. Auch dieser klingenähnliche Halter, z.B. eine Blattfeder, kann in einer wie dargestellt ausgeführten Klingenhalterung festgelegt werden.It is not necessary that the 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.

In Fig. 2 ist eine Anordnung mit einem Schwinger 21 dargestellt, der als ein Stab mit kreisförmigem Querschnitt ausgebildet ist, der sich entlang der gesamten Längserstreckung der Rakelrinne 3' befindet. Seine Länge entspricht also auch im wesentlichen der Länge der Streichklinge oder einer das Rollrakelbett haltenden Blattfeder. Ansonsten sind in der Figur ähnliche Bauteile wie in Fig. 1 mit jeweils dem gleichen Bezugszeichen, aber mit Apostroph versehen, gekennzeichnet. Hierbei ist der Schwinger 21 über seine Länge verteilt von Lagerböcken 22 aus einem Kunststoff, wie Polyurethan, unterstützt. Diese Stellen sollen sich vorzugsweise an den Schwingungsknoten der Schwingung des Stabes befinden, die durch einen stirnseitig an diesen angekoppelten, auf einer Konsole 31 gelagerten Schwingungserreger 27, 28 erzeugt wird. Stab 21 und Schwingungserreger können auch eine Transversalbewegung, d.h. in Längsrichtung der Blattfeder bzw. Rakelrinne 3' ausführen, so daß alle Stellen der Rakelrinne von den Schallwellen überstrichen werden. Ein Anschluß für die Flüssigkeit, insbesondere Wasser, ist als Rohranschluß 25 angedeutet, dessen zentrale Öffnung sich über den Raum 24 und Kanal 23 in die Rakelrinne 3' fortsetzt. Es können mehrere solcher Anschlüsse über die Länge der Rakelrinne 3' verteilt angeordnet sein.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. Here, 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 node 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. run in the longitudinal direction of the leaf spring or squeegee channel 3 ', so that all points of the squeegee channel are swept by the sound waves. 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 '.

Die Schwingungsfrequenzen können zwischen 20 und 80 kHz liegen. Es kann auch je ein Schwingungserreger an beiden Enden des stabförmigen Schwingers angekoppelt sein.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.

Als Schwingungserreger kommt hier ein Element 27 mit Magnetostriktion in Frage, das über ein Kopplungsstück 28 (sogenannter Booster) zur Amplitudenanpassung mit dem Schwinger 21 verbunden ist. Es können nicht dargestellte Trennfugen mit Flansch und Verbindungsschrauben und/oder Verklebung zu beiden Enden des Kopplungsstücks vorgesehen sein. Eine Dichtungsdurchführung für den Schwinger ist in der Stirnwand 26 der Rakelrinne 3' vorgesehen, wobei die Dichtung 30 mittels Brille 29 angepreßt wird.Man kann den Schwingungserreger auch am Halteflansch 32 festlegen.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.

Die Schwingungserreger vertreibt die Firma Martin Walter, Ultraschalltechnik GmbH, Erlenweg 14, Postfach 1246, D-7516 Karlsbad-Auerbach.The vibration exciter is sold by Martin Walter, Ultrasoundtechnik GmbH, Erlenweg 14, Postfach 1246, D-7516 Karlsbad-Auerbach.

Claims (9)

Rakeleinrichtung mit einem Sitz für eine als Rakelelement dienende oder damit verbundene Blattfeder, die in ihrem von der Streichkante des Rakelelements entfernten Bereich durch ein Spannelement einspannbar ist, das die Blattfeder gegen einen Anschlag preßt, dadurch gekennzeichnet, daß im Einspannbereich eine zu der genannten Kante parallele Rinne (3, 3') am Sitz der Blattfeder (2) vorgesehen ist und daß eine längs der Rinne (3, 3') sich erstreckende Reihe von Schwingungsimpulsgebern (7) in einer von der Blattfeder entfernten Wandung (19) der Rinne (3, 3') oder innerhalb der Rinne (3) ein entsprechend langer, stabförmiger Schwinger (21) sich befindet, an den an einer oder beiden Stirnseiten ein Schwingungsimpulsgeber angekoppelt ist.Squeegee device with a seat for a leaf spring serving or connected as a squeegee element, which can be clamped in its area remote from the coating edge of the squeegee element by a tensioning element which presses the leaf spring against a stop, characterized in that in the clamping area a parallel to said edge Trough (3, 3 ') is provided on the seat of the leaf spring (2) and that a row of vibration pulse generators (7) extending along the groove (3, 3') in a wall (19) of the groove (3 , 3 ') or within the channel (3) there is a correspondingly long, rod-shaped oscillator (21), to which an oscillation pulse generator is coupled on one or both end faces. Rakeleinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als Andruckelement der Blattfeder (2) ein Plattenschieber (5, 5') dient, der sich im wesentlichen im oberen Bereich der Rinne (3, 3') befindet.Doctor device according to claim 1, characterized in that a plate slide (5, 5 ') is used as the pressure element of the leaf spring (2), which is located essentially in the upper region of the channel (3, 3'). Rakeleinrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß als Schwingungsimpulsgeber (7) Piezoelemente oder magnetostriktive Elemente mit Senderfrequenzen zwischen 20 und 80 kHz vorgesehen sind.Doctor device according to one of claims 1 or 2, characterized in that piezo elements or magnetostrictive elements with transmitter frequencies between 20 and 80 kHz are provided as the vibration pulse generator (7). Rakeleinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Schwingungsimpulsgeber (7) in einer zur Rinne (3) parallel hin- und herbeweglichen, dem Anschlag (6) gegenüber befindlichen Leiste (20) angeordnet sind.Doctor device according to one of claims 1 to 3, characterized in that the vibration pulse generators (7) are arranged in a strip (20) which can be moved back and forth parallel to the channel (3) and is opposite the stop (6). Rakeleinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Impulsgeber (7) durch ein oder mehrere Schwingbleche (9) abgedeckt sind.Doctor device according to claim 4, characterized in that the pulse generators (7) are covered by one or more oscillating plates (9). Rakeleinreichung nach einem der Anspruche 1 bis 3, dadurch gekennzeichnet, daß der stabförmige Schwinger (21) aus Metall höchsten Elastizitätsmoduls, wie Titan, besteht.Doctor blade filing according to one of claims 1 to 3, characterized in that the rod-shaped oscillator (21) consists of metal of the highest modulus of elasticity, such as titanium. Rakeleinrichtung nach einem der Ansprüche 1 bis 3 oder 6, dadurch gekennzeichnet, daß der stabförmige Schwinger (21) in Richtung seiner Längsachse hin- und herbeweglich ist.Doctor device according to one of claims 1 to 3 or 6, characterized in that the rod-shaped oscillator (21) can be moved back and forth in the direction of its longitudinal axis. Rakeleinrichtung nach einem der Ansprüche 1 bis 3, 6 oder 7, dadurch gekennzeichnet, daß der stabförmige Schwinger (21) an wenigstens einiger Stellen seiner Schwingungsknoten auf Lagerböcken (22) aufliegt, die aus einem Kunststoff, wie Polyurethan, bestehen.Doctor device according to one of claims 1 to 3, 6 or 7, characterized in that the rod-shaped oscillator (21) rests on bearing blocks (22) which consist of a plastic, such as polyurethane, at at least some points of its oscillation nodes. Verfahren zum Betrieb einer Streicheinrichtung, dadurch gekennzeichnet, daß mittels einer unter Ultraschallfrequenz gesetzten Flüssigkeitsmenge der Sitz der Streichklinge oder Rakelhalterung gereinigt wird.Method for operating a coating device, characterized in that the seat of the coating blade or doctor blade holder is cleaned by means of a liquid quantity set under ultrasonic frequency.
EP90122497A 1989-12-07 1990-11-26 Doctoring device Expired - Lifetime EP0431431B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90122497T ATE91243T1 (en) 1989-12-07 1990-11-26 SQUEEGEE DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3940450A DE3940450A1 (en) 1989-12-07 1989-12-07 Squeegee device
DE3940450 1989-12-07

Publications (3)

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

Family

ID=6394982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122497A Expired - Lifetime EP0431431B1 (en) 1989-12-07 1990-11-26 Doctoring device

Country Status (10)

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

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CN108430648A (en) * 2015-12-09 2018-08-21 巴斯夫公司 The system and method for coating base material for solution

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DE4433048A1 (en) * 1994-09-16 1996-03-21 Tzn Forschung & Entwicklung Method and device for the continuous application of a coating to a material web
US6316060B1 (en) 1996-08-20 2001-11-13 Pacifica Papers Inc. Metering coatings
DE29617829U1 (en) * 1996-10-14 1997-01-23 Voith Sulzer Papiermasch Gmbh Application device for applying a coating medium
DE19729663A1 (en) * 1997-07-11 1999-01-14 Voith Sulzer Papiermasch Gmbh Doctor blade device for applying liquid or paste
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 (en) * 2002-12-06 2004-06-24 Stora Enso North America Corp. Shart dwell coater using sonic rods
DE102004040622A1 (en) * 2004-08-21 2006-02-23 Voith Paper Patent Gmbh doctor device

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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
EP0004605A1 (en) * 1978-04-10 1979-10-17 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Arrangement for cleaning cylinders of printing machines, particularly of offset printing machines
DE2951649A1 (en) * 1979-12-21 1981-07-02 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach DEVICE FOR REMOVING DIRT OR OTHER IMPURITIES FROM THE COLOR BOX OF A PRINTING MACHINE
EP0305827A1 (en) * 1987-08-28 1989-03-08 Henkel Kommanditgesellschaft auf Aktien Process for the ultrasonic cleaning of hard parts

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CN108430648A (en) * 2015-12-09 2018-08-21 巴斯夫公司 The system and method for coating base material for solution
CN108430648B (en) * 2015-12-09 2021-12-24 巴斯夫公司 System and method for solution coating a substrate

Also Published As

Publication number Publication date
EP0431431A3 (en) 1991-11-27
NO174659C (en) 1994-06-15
ATE91243T1 (en) 1993-07-15
FI106102B (en) 2000-11-30
US5136967A (en) 1992-08-11
DE59001916D1 (en) 1993-08-12
NO905144L (en) 1991-06-10
DE3940450A1 (en) 1991-06-13
NO174659B (en) 1994-03-07
EP0431431B1 (en) 1993-07-07
JPH03186378A (en) 1991-08-14
NO905144D0 (en) 1990-11-28
CA2031705A1 (en) 1991-06-08
ES2043221T3 (en) 1993-12-16
JP2920784B2 (en) 1999-07-19
BR9006269A (en) 1991-09-24
FI906027A (en) 1991-06-08
FI906027A0 (en) 1990-12-05

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