EP1496155B1 - Device for applying directly or indirectly a liquid or pasty suspension onto paper or board webs - Google Patents

Device for applying directly or indirectly a liquid or pasty suspension onto paper or board webs Download PDF

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Publication number
EP1496155B1
EP1496155B1 EP04013297A EP04013297A EP1496155B1 EP 1496155 B1 EP1496155 B1 EP 1496155B1 EP 04013297 A EP04013297 A EP 04013297A EP 04013297 A EP04013297 A EP 04013297A EP 1496155 B1 EP1496155 B1 EP 1496155B1
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EP
European Patent Office
Prior art keywords
web
diffuser
paper
roll
scraper
Prior art date
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Expired - Fee Related
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EP04013297A
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German (de)
French (fr)
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EP1496155A3 (en
EP1496155A2 (en
Inventor
Uwe Sachse
Reinhard Knop
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PAMA Papiermaschinen GmbH
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PAMA Papiermaschinen GmbH
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Publication of EP1496155A3 publication Critical patent/EP1496155A3/en
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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
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
    • 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
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters
    • D21H23/36—Knife or blade forming part of the fluid reservoir, e.g. puddle-type trailing blade or short-dwell coaters
    • 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

Definitions

  • the invention relates to a device for the direct or indirect application of liquid to pasty suspensions, in particular for color pigments or starches containing suspensions on paper or board webs.
  • the applied to a paper or board web suspension which may be a glue or color suspension, but also a pasty coating composition, applied from an application chamber either directly or indirectly via a mostly rubberized applicator roll on the web to be coated and subsequently by a roller blade or a doctor blade metered and fed to a press nip.
  • a size press for direct coating of the paper web is described, in which the glue suspension from an open application chamber is applied to the paper web and subsequently metered by means of a corrugated roller doctor blade.
  • This device is an open system, especially when suspensions of high viscosity are to be processed, at the high today usual working speeds of over 800 m / min not suitable for coating, since then no uniform film can be produced on the paper web.
  • a device for the indirect application of a liquid suspension in which the liquid suspension by means of one across the entire width the web-reaching nozzle applicator applied to an applicator roll and finely dosed by means of a doctor bed. In a press nip formed between the applicator roll and a press roll, the coating of the paper web takes place. Also in this commissioned work that occur in the device after DE 34 17 487 A1 mentioned disadvantages. Furthermore, in the DE 44 32 177 A1 a device for direct or indirect application of a liquid to pasty suspension described on a moving web. This device has a metering gap designed as a free-jet nozzle, to which the suspension to be applied is fed via a distributor tube.
  • the metering gap of this device is formed from two lips extending over the web width.
  • Such a device can be used for much higher operating speeds, since the suspension to be applied in this device can be supplied under pressure.
  • the increased pressure causes the nozzle gap, in particular in the middle region of the material web expands and thus leads to an increased order and thus to a non-uniform line image across the web width. This will not be completely eliminated by a downstream doctor, as a bending of the doctor bed can not be prevented.
  • For influencing the layer thickness are in this device at the gap lips sectionally arranged adjustment provided over which the gap width and thus the flow rate can be influenced.
  • the object of the invention is to provide a simple application device, in particular for high-speed coating systems for direct or indirect application of liquid to pasty suspensions on paper or board webs, with which it is possible without complex adjustment and control devices, a uniform streak-free Coating also allow for wide paper or board webs.
  • a laminar flow can be achieved by stage diffusers
  • the object of the invention with the features of claim 1 is achieved.
  • Advantageous embodiments of the device are specified in the subclaims.
  • the device according to the invention With the device according to the invention, a surprisingly good uniform line image of the applied suspension over the entire width of the paper or board web is achieved without a strip pattern in the order is recognizable by the present between the individual outlet openings webs of the diffuser block. Also, the suspension order over the entire width of the paper or board web is very uniform. A permanent measurement of the suspension order and subsequent corrective adjustment of the application gap or the supplied amount of suspension is unnecessary, so that the cost of such a device according to the invention can be kept low.
  • FIG. 1 a sectional view of the device according to the invention for the indirect application of viscous glue.
  • a cross section through the device is shown.
  • the device is attached to the crossbeam 1, in which the feed tube 2 is arranged for the glue to be applied.
  • a plurality of outlets 3 are arranged over the entire width of the non-illustrated paper web to be coated, which are connected by means of webs 4 and the screw 5 with the diffuser block 6.
  • the diffuser block 6 consists of a multiplicity of individual diffusers whose round inlet cross-section widens continuously to form a rectangular outlet cross-section.
  • the walls between the individual diffusers are tapered on the output side so that no vortices are generated in the glue suspension at these points.
  • the further guidance of the glue suspension is ensured on the transfer roller 9 facing side of the diffuser block 6 by the diffuser lip 7.
  • the overflow gap 8 Between the transfer roller 9 and the end of the diffuser lip 7 is the overflow gap 8, on which the too much added glue suspension in the Leim Weg Equipmentswanne 15 and from there into the so-called coating kitchen, not shown here, in which Glue suspension is recycled, can be returned.
  • the glue suspension is passed to the doctor bed 10.
  • the doctor bed 10 of the roller blade 11 is arranged, which is in operative connection with the transfer roller 9.
  • a not shown corrugation is introduced in the direction of its longitudinal axis.
  • the clamping device 14 fixes the doctor bed 10 between the crossbar 1 and the hose holder 13. With the pressure hose 12, the fine pressing of the roller blade 11 and thus the thickness of the glue layer to be applied is adjustable. About a separate pivot point, not shown, the adjustment of the overflow gap 8 is possible.

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  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Making Paper Articles (AREA)

Abstract

An assembly directly or indirectly applies a coating of liquid or paste to a fast-moving web of paper or carton. The liquid or paste is dispensed by a block of diffuser jets (3) with rectangular outlets directed at a revolving drum (9). Each jet is separated from the adjacent jet by a gusset (4) and discharges towards a revolving transfer drum (9) that is in contact with a revolving doctor (11) in contact with the drum. The assembly has a feed tube (2) extending the full width of the drum. The assembly has an overflow gap (8) in the vicinity of the diffuser block (6) that drains to a recovery tray. If the adhesive coating process is indirect, the glue is applied to the transfer drum (9) and from here to a press gap where it is applied to the paper or carton web.

Description

Die Erfindung betrifft eine Vorrichtung zum direkten oder indirekten Auftragen von flüssigen bis pastösen Suspensionen, insbesondere für Farbpigmente oder Stärken enthaltende Suspensionen auf Papier- oder Kartonbahnen.The invention relates to a device for the direct or indirect application of liquid to pasty suspensions, in particular for color pigments or starches containing suspensions on paper or board webs.

Stand der TechnikState of the art

Bei derartigen Vorrichtungen wird die auf eine Papier- oder Kartonbahn aufzubringende Suspension, die eine Leim- oder Farbsuspension, aber auch eine pastöse Auftragsmasse sein kann, aus einer Auftragskammer entweder direkt oder indirekt über eine zumeist gummierte Auftragswalze auf die zu beschichtende Bahn aufgebracht und nachfolgend mittels eines Rollrakels oder einer Streichklinge dosiert und einem Pressspalt zugeführt.
In der DE 34 17 487 A1 ist eine solche Leimpresse zum direkten Beschichten der Papierbahn beschrieben, bei der die Leimsuspension aus einer offenen Auftragskammer auf die Papierbahn aufgetragen und nachfolgend mittels eines geriffelten Rollrakels dosiert wird. Diese Vorrichtung ist als offenes System, insbesondere wenn Suspensionen hoher Viskosität verarbeitet werden sollen, bei den hohen heute üblichen Arbeitsgeschwindigkeiten von über 800 m/min nicht zum Beschichten geeignet, da dann kein gleichmäßiger Film auf der Papierbahn erzeugt werden kann.In such devices, the applied to a paper or board web suspension, which may be a glue or color suspension, but also a pasty coating composition, applied from an application chamber either directly or indirectly via a mostly rubberized applicator roll on the web to be coated and subsequently by a roller blade or a doctor blade metered and fed to a press nip.
In the DE 34 17 487 A1 Such a size press for direct coating of the paper web is described, in which the glue suspension from an open application chamber is applied to the paper web and subsequently metered by means of a corrugated roller doctor blade. This device is an open system, especially when suspensions of high viscosity are to be processed, at the high today usual working speeds of over 800 m / min not suitable for coating, since then no uniform film can be produced on the paper web.

Das gleiche trifft auch auf die in der DE 295 10 486 U1 beschriebenen Vorrichtung zu. Ferner besteht insbesondere bei hohen Arbeitsbreiten die Gefahr, dass sich das Rollrakel durchbiegt und dadurch die aufgetragene Schicht in der Mitte der Bahn dicker als am Rande ausfällt.The same is true of the in the DE 295 10 486 U1 described device to. Furthermore, especially at high working widths there is the risk that the roller blade will sag and thereby the applied layer in the middle of the web will be thicker than at the edge.

Nach der DE 44 14 921 A1 ist eine Vorrichtung zum indirekten Auftragen einer flüssigen Suspension bekannt, bei der die flüssige Suspension mittels eines über die gesamte Breite
der Materialbahn reichenden Düsenauftragswerkes auf eine Auftragswalze aufgetragen und mittels eines Rakelbetts fein dosiert wird. In einem zwischen der Auftragswalze und einer Presswalze gebildeten Pressspalt erfolgt das Beschichten der Papierbahn. Auch bei diesem Auftragswerk treten die bei der Vorrichtung nach der DE 34 17 487 A1 genannten Nachteile auf.
Ferner ist in der DE 44 32 177 A1 eine Vorrichtung zum direkten oder indirekten Auftragen einer flüssigen bis pastösen Suspension auf eine laufende Materialbahn beschrieben. Diese Vorrichtung weist einen als Freistrahldüse ausgebildeten Dosierspalt auf, dem die aufzutragende Suspension über ein Verteilerrohr zugeführt wird. Der Dosierspalt dieser Vorrichtung wird aus zwei über die Bahnbreite reichenden Lippen gebildet. Eine solche Vorrichtung kann für wesentlich höhere Arbeitsgeschwindigkeiten eingesetzt werden, da die aufzutragende Suspension in dieser Vorrichtung unter Druck zugeführt werden kann. Allerdings führt der erhöhte Druck dazu, dass sich der Düsenspalt insbesondere im Mittenbereich der Materialbahn aufweitet und es so zu einem erhöhten Auftrag und damit zu einem ungleichmäßigen Strichbild über die Bahnbreite führt. Dies wird auch durch ein nachgeordnetes Rakel nicht vollständig zu beseitigen sein, da ein Verbiegen des Rakelbetts nicht zu verhindern ist. Zur Beeinflussung der Schichtdicke sind bei dieser Vorrichtung an den Spaltlippen sektionsweise angeordnete Verstellelemente vorgesehen, über welche die Spaltbreite und damit die Durchflussmenge beeinflussbar ist. Um diese Verstellungen auch während des Betriebes einer solchen Anlage vornehmen und gleichzeitig sich während des Betriebes ergebende Änderungen ausgleichen zu können, sind Stellmotoren vorgesehen, die über die Messung der aufgetragenen Schicht und einen Regelkreis gewährleisten, dass die Schicht über die gesamte Bahnbreite konstant bleibt. Der Aufwand für die Herstellung einer solchen Vorrichtung ist sehr hoch. Darüber hinaus weist ein solcher Regelkreis mit seinen vielen Elementen eine erhebliche Störanfälligkeit auf. Diesbezüglich bringt auch die in der EP 0 761 877 A2 beschriebene Weiterentwicklung der vorgenannten Freistrahl-Auftragseinrichtung keine entscheidende Verbesserung. Auch hier sind zum Erzielen eines gleichmäßigen Strichbildes Stelleinrichtungen am Auslaufspalt erforderlich.After DE 44 14 921 A1 a device for the indirect application of a liquid suspension is known in which the liquid suspension by means of one across the entire width
the web-reaching nozzle applicator applied to an applicator roll and finely dosed by means of a doctor bed. In a press nip formed between the applicator roll and a press roll, the coating of the paper web takes place. Also in this commissioned work that occur in the device after DE 34 17 487 A1 mentioned disadvantages.
Furthermore, in the DE 44 32 177 A1 a device for direct or indirect application of a liquid to pasty suspension described on a moving web. This device has a metering gap designed as a free-jet nozzle, to which the suspension to be applied is fed via a distributor tube. The metering gap of this device is formed from two lips extending over the web width. Such a device can be used for much higher operating speeds, since the suspension to be applied in this device can be supplied under pressure. However, the increased pressure causes the nozzle gap, in particular in the middle region of the material web expands and thus leads to an increased order and thus to a non-uniform line image across the web width. This will not be completely eliminated by a downstream doctor, as a bending of the doctor bed can not be prevented. For influencing the layer thickness are in this device at the gap lips sectionally arranged adjustment provided over which the gap width and thus the flow rate can be influenced. In order to make these adjustments during the operation of such a system and at the same time to be able to compensate for changes resulting during operation, servomotors are provided, which ensure via the measurement of the applied layer and a control loop that the layer remains constant over the entire web width. The cost of producing such a device is very high. In addition, such a control circuit with its many elements on a considerable susceptibility to interference. In this regard also brings in the EP 0 761 877 A2 described further development of the aforementioned free-jet applicator no decisive improvement. Again, to achieve a uniform line image adjusting devices on the outlet gap required.

Eine den vorgenannten Vorrichtungen ähnliche Auftragseinrichtung für flüssige bis pastöse Suspensionen ist in der DE 198 01 140 A1 beschrieben, die ein aufwändiges Regelsystem zur Erzielung eines gleichmäßigen Strichbildes aufweist.
In einer anderen Vorrichtung nach der DE 40 00 556 A1 wird vorgeschlagen, die Gleichmäßigkeit der aufgetragenen Schicht durch die Anordnung von mehreren Rakelmessern zu verbessern, wobei die aufzutragende Suspension in einer laminaren Strömung auf der Rückseite eines Vorrakelmessers direkt auf die Papier- oder Kartonbahn aufgetragen wird. Mit einer derartigen Vorrichtung ist jedoch auch nicht zu vermeiden, dass insbesondere bei breiten Materialbahnen, hohen Arbeitsgeschwindigkeiten und hohen Viskositäten der aufzubringenden Suspensionen der Auftragsspalt durch den Druck im Zuführsystem aufgeweitet wird, und somit über die Bahnbreite eine Ungleichmäßigkeit in der Schichtdicke zu verzeichnen ist.
Mit der DE 43 03 577 A1 wird dieses System dadurch weiter verbessert, indem die Menge der zugeführten Suspension geregelt wird. Aber auch mit dieser Maßnahme ist der vorgenannte Mangel einer solchen Auftragseinrichtung nicht zu beheben.
Die maschinenbaulich nahe liegende Lösung, das Aufweiten des Spaltes infolge des inneren Drucks durch das Einbringen von Stegen zu verhindern, scheitert daran, dass eine solche Konstruktion zwangsweise Streifen im Strichauftrag verursacht.
Im Patent US 5,376,177 ist ein Streichaggregat mit einer Vorrichtung zur Regelung des Schichtgewichts in der Querrichtung einer Papierbahn beschrieben. Dazu ist eine Auftragskammer mit einem nachfolgend angeordneten Rollrakel vorgesehen. Zur Beeinflussung der dem Rollrakel zur Verfügung gestellten Menge an Beschichtungsflüssigkeit weist die zulaufseitige Begrenzung der Auftragskammer eine Vielzahl von Durchbrüchen auf, die lokal mit Abdeckschiebern verschlossen werden können. Zur Erzielung einer gleichmäßigen Strichbildes erfordert diese Lösung einen hohen Aufwand an Einstellmitteln.
Eine ähnliche indirekt die Schichtdicke beeinflussende Lösung ist in der EP 0 571 849 A1 beschrieben. Hier sind in der Auftragskammer über die Breite der Auftragseinrichtung verteilt, im Ausflussquerschnitt einstellbare Ablaufstellen angeordnet, über welche ein Teil der der Auftragskammer zugeführten Beschichtungsflüssigkeit abfließen kann. Diese Lösung führt neben dem hohen Aufwand für die Einstellmechanismen dieser veränderbaren Ausflussquerschnitte zu einem streifenförmigen Auftragsbild, da die Entfernung zwischen den Auslaufstellen zu Druckunterschieden in der Auftragskammer führen, die bis zum Rollrakel nicht ausgeglichen sind.An application device for liquid to pasty suspensions similar to the aforementioned devices is disclosed in US Pat DE 198 01 140 A1 described, which has a complex control system to achieve a uniform line image.
In another device after the DE 40 00 556 A1 It is proposed to improve the uniformity of the applied layer by the arrangement of several doctor blades, wherein the suspension to be applied is applied in a laminar flow on the back of a pre-doctor blade directly on the paper or board web. However, with such a device is also unavoidable, especially in the case of wide material webs, high operating speeds and high viscosities of the suspensions to be applied, the application gap through the Pressure in the feed system is widened, and thus over the web width unevenness in the layer thickness is recorded.
With the DE 43 03 577 A1 this system is further improved by controlling the amount of suspension supplied. But even with this measure is the failing to remedy the aforementioned defect of such an order device.
The mechanical engineering solution, to prevent the widening of the gap due to the internal pressure by the introduction of webs, fails because such a construction necessarily causes stripes in the coating order.
In the patent US 5,376,177 a coating unit is described with a device for controlling the layer weight in the transverse direction of a paper web. For this purpose, an application chamber is provided with a subsequently arranged roller blade. To influence the amount of coating liquid provided to the roller blade, the inlet-side boundary of the application chamber has a large number of openings which can be closed locally with cover slides. To achieve a uniform line image, this solution requires a lot of adjustment.
A similar indirectly influencing the layer thickness solution is in the EP 0 571 849 A1 described. Here are distributed in the application chamber over the width of the applicator, adjustable outlet points are arranged in the discharge cross-section, through which a part of the application chamber supplied coating liquid can flow. This solution leads in addition to the high cost of the adjustment mechanisms of these variable Ausflussquerschnitte to a strip-like application pattern, since the distance between the outlet points lead to pressure differences in the application chamber, which are not compensated until the roller blade.

Aufgabe der ErfindungObject of the invention

Das Ziel der Erfindung besteht darin, eine einfache Auftragsvorrichtung insbesondere für mit hohen Geschwindigkeiten arbeitende Beschichtungsanlagen zum direkten oder indirekten Auftragen von flüssigen bis pastösen Suspensionen auf Papier- oder Kartonbahnen zu schaffen, mit der es ohne aufwändige Verstell- und Regeleinrichtungen möglich ist, eine gleichmäßige streifenfreie Beschichtung auch von breiten Papier- oder Kartonbahnen zu ermöglichen. Ausgehend von den strömungsphysikalischen Erkenntnissen, nach denen eine laminare Strömung durch Stufendiffusoren erzielbar ist, wird die Aufgabe der Erfindung mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Vorrichtung sind in den Unteransprüchen angegeben.The object of the invention is to provide a simple application device, in particular for high-speed coating systems for direct or indirect application of liquid to pasty suspensions on paper or board webs, with which it is possible without complex adjustment and control devices, a uniform streak-free Coating also allow for wide paper or board webs. Based on the fluid physics findings, according to which a laminar flow can be achieved by stage diffusers, the object of the invention with the features of claim 1 is achieved. Advantageous embodiments of the device are specified in the subclaims.

Mit der erfindungsgemäßen Vorrichtung wird ein überraschend gutes gleichmäßiges Strichbild der aufgetragenen Suspension über die gesamte Breite der Papier- oder Kartonbahn erreicht, ohne dass durch die zwischen den einzelnen Auslassöffnungen vorhandenen Stege des Diffusorblockes ein Streifenbild im Strichauftrag erkennbar ist. Auch ist der Suspensionsauftrag über die gesamte Breite der Papier- oder Kartonbahn sehr gleichmäßig. Eine permanente Messung des Suspensionsauftrages und nachfolgende korrigierende Verstellung des Auftragsspaltes oder der zugeführten Suspensionsmenge erübrigt sich, so dass die Kosten für eine solche erfindungsgemäße Vorrichtung niedrig gehalten werden können.With the device according to the invention, a surprisingly good uniform line image of the applied suspension over the entire width of the paper or board web is achieved without a strip pattern in the order is recognizable by the present between the individual outlet openings webs of the diffuser block. Also, the suspension order over the entire width of the paper or board web is very uniform. A permanent measurement of the suspension order and subsequent corrective adjustment of the application gap or the supplied amount of suspension is unnecessary, so that the cost of such a device according to the invention can be kept low.

Ausführungsbeispielembodiment

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher erläutert.The invention will be explained in more detail with reference to an embodiment.

Die zugehörige Zeichnung zeigt in Fig. 1 eine Schnittdarstellung der erfindungsgemäßen Vorrichtung zum indirekten Auftragen von dickflüssigem Leim.The accompanying drawing shows in Fig. 1 a sectional view of the device according to the invention for the indirect application of viscous glue.

In der Figur ist ein Querschnitt durch die Vorrichtung dargestellt. Die Vorrichtung ist am Querbalken 1 befestigt, in dem auch das Zuführrohr 2 für den aufzutragenden Leim angeordnet ist. Im Zuführrohr 2 sind über die gesamte Breite der nicht näher dargestellten zu beschichtenden Papierbahn eine Vielzahl von Auslässen 3 angeordnet, welche unter Vermittlung von Stegen 4 und der Verschraubung 5 mit dem Diffusorblock 6 verbunden sind. Der Diffusorblock 6 besteht aus einer Vielzahl von einzelnen Diffusoren, deren runder Eingangsquerschnitt sich kontinuierlich zu einem rechteckigen Austrittsquerschnitt erweitert. Die Wände zwischen den einzelnen Diffusoren laufen ausgangsseitig spitz aus, so dass an diesen Stellen keine Wirbel in der Leimsuspension erzeugt werden. Die weitere Führung der Leimsuspension wird auf der der Übertragungswalze 9 zugewandten Seite des Diffusorblocks 6 durch die Diffusorlippe 7 gewährleistet. Zwischen der Übertragungswalze 9 und dem Ende der Diffusorlippe 7 befindet sich der Überlaufspalt 8, über den die zuviel zugeführte Leimsuspension in die Leimrückführungswanne 15 und von da aus in die hier nicht näher dargestellte sogenannte Streichküche, in der die Leimsuspension aufbereitet wird, zurückgeführt werden kann.In the figure, a cross section through the device is shown. The device is attached to the crossbeam 1, in which the feed tube 2 is arranged for the glue to be applied. In the feed tube 2, a plurality of outlets 3 are arranged over the entire width of the non-illustrated paper web to be coated, which are connected by means of webs 4 and the screw 5 with the diffuser block 6. The diffuser block 6 consists of a multiplicity of individual diffusers whose round inlet cross-section widens continuously to form a rectangular outlet cross-section. The walls between the individual diffusers are tapered on the output side so that no vortices are generated in the glue suspension at these points. The further guidance of the glue suspension is ensured on the transfer roller 9 facing side of the diffuser block 6 by the diffuser lip 7. Between the transfer roller 9 and the end of the diffuser lip 7 is the overflow gap 8, on which the too much added glue suspension in the Leimrückführungswanne 15 and from there into the so-called coating kitchen, not shown here, in which Glue suspension is recycled, can be returned.

Auf der von der Übertragungswalze 9 abgewandten Seite des Diffusorblocks 6 wird die Leimsuspension bis zum Rakelbett 10 geleitet. Im Rakelbett 10 ist der Rollrakel 11 angeordnet, der mit der Übertragungswalze 9 in Wirkverbindung steht. Das Anpressen des Rollrakels 11 an die Übertragungswalze 9 erfolgt mittels des Anpressschlauchs 12, welcher durch den Schlauchhalter 13 abgestützt wird.
Auf der Umfangsoberfläche des Rollrakels 11 ist in Richtung dessen Längsachse eine nicht näher dargestellte Riffelung eingebracht.
Die Klemmvorrichtung 14 fixiert das Rakelbett 10 zwischen dem Querbalken 1 und dem Schlauchhalter 13. Mit dem Anpressschlauch 12 ist die Feinanpressung des Rollrakels 11 und damit die Dicke der aufzutragenden Leimschicht einstellbar. Über einen nicht näher dargestellten separaten Drehpunkt ist die Einstellung des Überlaufspalts 8 möglich.On the side facing away from the transfer roller 9 side of the diffuser block 6, the glue suspension is passed to the doctor bed 10. In the doctor bed 10 of the roller blade 11 is arranged, which is in operative connection with the transfer roller 9. The pressing of the roller blade 11 to the transfer roller 9 by means of the Anpressschlauchs 12, which is supported by the hose holder 13.
On the peripheral surface of the roller blade 11, a not shown corrugation is introduced in the direction of its longitudinal axis.
The clamping device 14 fixes the doctor bed 10 between the crossbar 1 and the hose holder 13. With the pressure hose 12, the fine pressing of the roller blade 11 and thus the thickness of the glue layer to be applied is adjustable. About a separate pivot point, not shown, the adjustment of the overflow gap 8 is possible.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Querbalkencrossbeam
22
Zuführrohrfeed
33
Auslassoutlet
44
Stegweb
55
Verschraubungscrew
66
Diffusorblockdiffuser block
77
Diffusorlippediffuser lip
88th
ÜberlaufspaltOverflow gap
99
Übertragungswalzetransfer roller
1010
Rakelbettdoctor bed
1111
Rollrakelroll doctor
1212
Anpressschlauchpressure tube
1313
Schlauchhalterhose holder
1414
Klemmvorrichtungclamping device
1515
LeimrückführungswanneLeimrückführungswanne

Claims (5)

  1. A device for directly or indirectly applying liquid or pasty suspensions on a moving paper or cardboard web, comprising
    - a web guiding roll arranged transversely to the paper or cardboard web, or a transmission roll (9) acting together with a press roll,
    - a supply pipe for the suspension (2) to apply which extends over the whole width of the paper or cardboard web and exhibits a plurality of diffuser-like enlarged discharge outlets (3) that are arranged in parallel and directed towards the web guiding or transmission roll (9),
    - an overflow slit (8) situated at the intake side with respect to the direction of rotation of the roll in the outlet region of the diffuser block (6) between the same and the web guiding or transmission roll (9),
    - a scraper arranged at the discharge side of the diffuser block (6) with respect to the direction of rotation of the web guiding or transmission roll (9) which is designed to be pressed onto the web guiding or transmission roll (9),
    characterized by the fact that
    - for diffuser-like enlarging the discharge outlets (3) at the supply pipe (2), a diffuser block (6) is arranged extending over the whole width of the paper or cardboard web that contains a plurality of discrete diffusers having a rectangular cross section in the outlet area and being separated from the adjacent discharge outlet (3) by tapered bars (4) that do not extend up to the web guiding or transmission roll (9).
  2. The device according to claim 1, characterized by the fact that the diffuser-like enlarged discharge outlets (3) are oriented to the web guiding and transmission roll (9) in a way that their extended axes cross the circumference of the web guiding or transmission roll directly in front of the contact point of the scraper with the web guiding or transmission roll (9).
  3. The device according to claim 1 or 2, characterized by the fact that the scraper is a rolling scraper (11).
  4. The device according to claim 3, characterized by the fact that the rolling scraper (11) shows striations on the surface of its entire peripheral surface which are in line with the axe of the rolling scraper.
  5. The device according to claim 3 or 4, characterized by the fact that the contact pressure of the rolling scraper (11) is controllable by a pressure pipe (12) situated between the support (10) of the rolling scraper and the support of the pipe (13).
EP04013297A 2003-07-09 2004-06-05 Device for applying directly or indirectly a liquid or pasty suspension onto paper or board webs Expired - Fee Related EP1496155B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10331145A DE10331145A1 (en) 2003-07-09 2003-07-09 Device for the direct or indirect application of liquid to pasty suspensions on paper or board webs
DE10331145 2003-07-09

Publications (3)

Publication Number Publication Date
EP1496155A2 EP1496155A2 (en) 2005-01-12
EP1496155A3 EP1496155A3 (en) 2007-01-03
EP1496155B1 true EP1496155B1 (en) 2010-03-24

Family

ID=33441694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04013297A Expired - Fee Related EP1496155B1 (en) 2003-07-09 2004-06-05 Device for applying directly or indirectly a liquid or pasty suspension onto paper or board webs

Country Status (3)

Country Link
EP (1) EP1496155B1 (en)
AT (1) ATE462043T1 (en)
DE (2) DE10331145A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005027791A1 (en) 2005-06-15 2006-12-21 Pama Papiermaschinen Gmbh Device for applying liquid to pasty suspensions on paper or board webs
KR20100087299A (en) * 2007-10-05 2010-08-04 바스프 에스이 Method for coating zinc-plated steel strips with aqueous formulations of acidic polymers

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3417487A1 (en) 1984-05-11 1985-11-21 J.M. Voith Gmbh, 7920 Heidenheim DEVICE FOR APPLYING A LIQUID ON A RUNNING TRAIN
FI90634C (en) 1989-01-17 1994-03-10 Valmet Paper Machinery Inc Coating device and method for coating a web
FI91298C (en) 1992-04-10 1994-06-10 Valmet Paper Machinery Inc Method for coating a web of material
DE4217528C2 (en) * 1992-05-27 1996-05-30 Voith Gmbh J M Coating device for running webs
US5376177A (en) * 1993-08-09 1994-12-27 Macmillan Bloedel Limited Coat weight profiling
DE4414921C2 (en) 1994-04-28 1998-03-19 Voith Gmbh J M Method and device for applying at least one liquid medium to a running material web, in particular made of paper or cardboard
DE4432177A1 (en) 1994-09-09 1996-03-14 Voith Gmbh J M An applicator gap is adjustable as pulp coat flows on moving paper web
DE29510486U1 (en) * 1995-06-30 1995-08-17 Voith Sulzer Papiermasch Gmbh Squeegee assembly
EP0761877A3 (en) * 1995-09-06 1997-06-25 Voith Sulzer Papiermasch Gmbh Device for applying directly or indirectly fluid or pasty material onto a moving web, in particular paper or board
DE19801140A1 (en) 1998-01-14 1999-07-15 Voith Sulzer Papiertech Patent Device for the direct or indirect application of a liquid to pasty application medium on a running material web and operating method for such a device

Also Published As

Publication number Publication date
DE10331145A1 (en) 2005-01-27
EP1496155A3 (en) 2007-01-03
DE502004010929D1 (en) 2010-05-06
ATE462043T1 (en) 2010-04-15
EP1496155A2 (en) 2005-01-12

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