EP1496155A2 - 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
EP1496155A2
EP1496155A2 EP04013297A EP04013297A EP1496155A2 EP 1496155 A2 EP1496155 A2 EP 1496155A2 EP 04013297 A EP04013297 A EP 04013297A EP 04013297 A EP04013297 A EP 04013297A EP 1496155 A2 EP1496155 A2 EP 1496155A2
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EP
European Patent Office
Prior art keywords
web
transfer roller
paper
diffuser
liquid
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
EP04013297A
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German (de)
French (fr)
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EP1496155B1 (en
EP1496155A3 (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 EP1496155A2 publication Critical patent/EP1496155A2/en
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 direct or indirect application of liquid to pasty suspensions, especially for color pigments or starches containing Suspensions on paper or board webs.
  • a paper or board web suspension which may be a glue or dye 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 means of a roller blade or a Spreading 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 is applied from an open application chamber to the paper web and subsequently metered by means of a corrugated roller doctor blade.
  • This device is not suitable as an open system, especially when suspensions of high viscosity to be processed at the high working speeds of more than 800 m / min currently used for coating, since then no uniform film can be produced on the paper web.
  • 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 over 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, the disadvantages mentioned in the device according to DE 34 17 487 A1 occur. Furthermore, DE 44 32 177 A1 describes a device for direct or indirect application of a liquid to pasty suspension onto a moving material 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 to expand, in particular in the middle region of the material web, thus leading to an increased application and thus to an uneven line pattern over the web width. This will not be completely eliminated by a downstream doctor, as a bending of the doctor bed can not be prevented.
  • adjustment elements arranged in sections at the gap lips are provided in this device, via which the gap width and thus the flow rate can be influenced.
  • 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.
  • such a control circuit with its many elements on a considerable susceptibility to interference is described in DE 198 01 140 A1, which has a complex control system for achieving a uniform line pattern.
  • the aim of the invention is to provide a simple Applicator especially for high speeds working coating systems for direct or indirect application of liquid to pasty To provide suspensions on paper or board webs, with it without complex adjustment and control devices possible, a uniform streak-free Coating also from wide paper or board webs too enable.
  • the task of the Invention solved with the features of claim 1.
  • Advantageous embodiments of the device are in the Subclaims specified.
  • the device according to the invention is a surprise good uniform line image of the applied Suspension over the entire width of the paper or Cardboard web reached without being affected by the between the individual outlet openings existing webs of the diffuser block a stripe image is recognizable in line order. Also, the suspension order across the entire width the paper or board web very evenly. A permanent one Measurement of the suspension order and subsequent corrective adjustment of the order 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 is a sectional view the device according to the invention for indirect Apply thick glue.
  • FIG. 1 In the figure is a cross section through the device shown.
  • the device is attached to the crossbeam 1, in which also the feed tube 2 for the applied Glue is arranged.
  • the feed tube 2 In the feed tube 2 are over the entire Width of the non-illustrated to be coated Paper web arranged a variety of outlets 3 which mediated by bars 4 and the Screw 5 are connected to the diffuser block 6.
  • the diffuser block 6 consists of a variety of individual diffusers whose round inlet cross-section continuously to a rectangular outlet cross-section extended. The walls between each one Diffusers run out on the output side pointed, so that on these spots no vortex generated in the glue suspension become.
  • the further guidance of the glue suspension is on the transfer roller 9 side facing the Ensures diffuser block 6 through the diffuser lip 7.
  • 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 direct or indirect application of liquid to pasty suspensions, especially 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 Papieroder Kartonbahn aufzubringende Suspension, die eine Leimoder 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 dye 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 means of a roller blade or a Spreading blade metered and fed to a press nip.
In DE 34 17 487 A1, such a size press for direct coating of the paper web is described in which the glue suspension is applied from an open application chamber to the paper web and subsequently metered by means of a corrugated roller doctor blade. This device is not suitable as an open system, especially when suspensions of high viscosity to be processed at the high working speeds of more than 800 m / min currently used for coating, since then no uniform film can be produced on the paper web.

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 Bahn-breite 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. Eine der vorgenannten Vorrichtung 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.According to 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 over 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, the disadvantages mentioned in the device according to DE 34 17 487 A1 occur.
Furthermore, DE 44 32 177 A1 describes a device for direct or indirect application of a liquid to pasty suspension onto a moving material 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 to expand, in particular in the middle region of the material web, thus leading to an increased application and thus to an uneven line pattern over the web width. This will not be completely eliminated by a downstream doctor, as a bending of the doctor bed can not be prevented. In order to influence the layer thickness, adjustment elements arranged in sections at the gap lips are provided in this device, via 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. An application device for liquid to pasty suspensions similar to the aforementioned device is described in DE 198 01 140 A1, which has a complex control system for achieving a uniform line pattern.

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.In another device according to DE 40 00 556 A1 it is proposed to improve the uniformity of the applied layer by the arrangement of a plurality of doctor blades, wherein the suspension to be applied is applied in a laminar flow on the back of Vorrakelmessers directly on the paper or board web , With such a device, however, it can not be avoided that the application gap is widened by the pressure in the feed system, in particular in the case of wide webs of material, high operating speeds and high viscosities of the suspensions to be applied, and thus an unevenness in the layer thickness can be recorded over the web width.
With DE 43 03 577 A1, this system is further improved by the amount of suspension supplied is regulated. But even with this measure, the aforementioned shortcoming of such an order device is not correct.
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.

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 strei-fenfreie 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 aim of the invention is to provide a simple Applicator especially for high speeds working coating systems for direct or indirect application of liquid to pasty To provide suspensions on paper or board webs, with it without complex adjustment and control devices possible, a uniform streak-free Coating also from wide paper or board webs too enable. Starting from the flow physical Findings, according to which a laminar flow through Stage diffusers is achievable, the task of the Invention solved with the features of claim 1. Advantageous embodiments of the device are in the Subclaims specified.

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 is a surprise good uniform line image of the applied Suspension over the entire width of the paper or Cardboard web reached without being affected by the between the individual outlet openings existing webs of the diffuser block a stripe image is recognizable in line order. Also, the suspension order across the entire width the paper or board web very evenly. A permanent one Measurement of the suspension order and subsequent corrective adjustment of the order 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 described below with reference to an embodiment explained in more detail.

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 is a sectional view the device according to the invention for indirect Apply thick 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 is a cross section through the device shown. The device is attached to the crossbeam 1, in which also the feed tube 2 for the applied Glue is arranged. In the feed tube 2 are over the entire Width of the non-illustrated to be coated Paper web arranged a variety of outlets 3 which mediated by bars 4 and the Screw 5 are connected to the diffuser block 6. The diffuser block 6 consists of a variety of individual diffusers whose round inlet cross-section continuously to a rectangular outlet cross-section extended. The walls between each one Diffusers run out on the output side pointed, so that on these spots no vortex generated in the glue suspension become. The further guidance of the glue suspension is on the transfer roller 9 side facing the Ensures diffuser block 6 through the diffuser lip 7. Between the transfer roller 9 and the end of Diffuser lip 7 is the overflow gap 8, over the too much added glue suspension in the Leimrückführungswanne 15 and from there in the not here detailed so-called coating kitchen, in which the Glue suspension is recycled, be recycled can.

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)

Vorrichtung zum direkten oder indirekten Auftragen von flüssigen bis pastösen Suspensionen auf eine laufende Papier- oder Kartonbahn, mit einer quer zum Verlauf der Papier- oder Kartonbahn angeordneten Bahnführungswalze oder einer mit einer Presswalze zusammenwirkenden Übertragungswalze (9), einem über die gesamte Breite der Papier- oder Kartonbahn reichenden Zuführrohr (2) für die aufzutragende Suspension, das eine Vielzahl nebeneinander angeordneter auf die Bahnführungs- bzw. Übertragungswalze (9) gerichteter diffusorartig erweiterter Auslässe (3) aufweist, die im Austrittsbereich einen rechteckigen Querschnitt haben und vom benachbarten Auslass (3) durch spitz auslaufende, nicht bis an die Bahnführungs- oder Übertragungswalze (9) reichende Stege (4) getrennt sind, und so einen Diffusorblock (6) bilden, einem Überlaufspalt (8) der im Austrittsbereich des Diffusorblocks (6) zwischen diesem und der Bahnführungs- oder Übertragungswalze (9) in deren Drehrichtung einlaufseitig gebildet ist, einem an die Bahnführungs- oder Übertragungswalze (9) anpressbaren Rakel, welches im Austrittsbereich des Diffusorblocks (6) in Drehrichtung der Bahnführungs- oder Übertragungswalze (9) auslaufseitig angeordnet ist. Device for direct or indirect application of liquid to pasty suspensions on a moving paper or board web, with a web guide roll arranged transversely to the course of the paper or board web or a transfer roll (9) cooperating with a press roll, an over the entire width of the paper or board web-reaching feed tube (2) for the suspension to be applied, which has a plurality of juxtaposed on the Bahnführungs- or transfer roller (9) directed diffuser-like expanded outlets (3) in the exit region of a rectangular cross-section and are separated from the adjacent outlet (3) by tapering webs (4) which do not reach the web guiding or transfer roller (9) and thus form a diffuser block (6), an overflow gap (8) formed in the outlet region of the diffuser block (6) between this and the web guide or transfer roller (9) in the direction of rotation inlet side, a squeegee which can be pressed against the web guiding or transfer roller (9) and which is arranged at the outlet side in the exit region of the diffuser block (6) in the direction of rotation of the web guiding or transfer roller (9). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die diffusorartig erweiterten Auslässe (3) so zur Bahnführungs- oder Übertragungswalze (9) ausgerichtet sind, dass deren verlängerte Mittelachsen den Umfang der Bahnführungs- oder Übertragungswalze in der Nähe des Berührungspunktes des Rakels mit der Bahnführungs- oder Übertragungswalze (9) schneiden.Apparatus according to claim 1, characterized in that the diffuser-like widened outlets (3) are aligned with the web guiding or transferring roll (9) such that their elongate center axes extend the circumference of the web guiding or transferring roll near the point of contact of the squeegee with the web guiding web. or the transfer roller (9). Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Rakel ein Rollrakel (11) ist.Apparatus according to claim 1 or 2, characterized in that the doctor blade is a roller blade (11). Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Rollrakel (11) an seiner Umfangsoberfläche eine in Achsrichtung ausgerichtete Riffelung aufweist.Apparatus according to claim 3, characterized in that the roller blade (11) has on its peripheral surface aligned in the axial direction corrugation. Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass der Anpressdruck des Rollrakels (11), mittels eines zwischen Rakelbett (10) und Schlauchhalter (13) angeordnetem Anpressschlauch (12) steuerbar ist.Apparatus according to claim 3 or 4, characterized in that the contact pressure of the roller blade (11), by means of a between doctor blade (10) and hose holder (13) arranged pressure hose (12) is controllable.
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)

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

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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

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

Cited By (2)

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EP1733802A1 (en) * 2005-06-15 2006-12-20 PAMA Papiermaschinen GmbH Device for applying a liquid or pasty suspension on paper or board webs
WO2009047209A1 (en) * 2007-10-05 2009-04-16 Basf Se Method for coating zinc-plated steel strips with aqueous formulations of acidic polymers

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DE3417487A1 (en) 1984-05-11 1985-11-21 J.M. Voith Gmbh, 7920 Heidenheim DEVICE FOR APPLYING A LIQUID ON A RUNNING TRAIN
DE4000556A1 (en) 1989-01-17 1990-07-19 Valmet Paper Machinery Inc INVERTED Squeegee Dosing Unit and Squeegee Spreading Method for a Material Web
DE4303577A1 (en) 1992-04-10 1993-10-14 Valmet Paper Machinery Inc Process for coating a material web
DE4414921A1 (en) 1994-04-28 1995-11-02 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
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

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DE3417487A1 (en) 1984-05-11 1985-11-21 J.M. Voith Gmbh, 7920 Heidenheim DEVICE FOR APPLYING A LIQUID ON A RUNNING TRAIN
DE4000556A1 (en) 1989-01-17 1990-07-19 Valmet Paper Machinery Inc INVERTED Squeegee Dosing Unit and Squeegee Spreading Method for a Material Web
DE4303577A1 (en) 1992-04-10 1993-10-14 Valmet Paper Machinery Inc Process for coating a material web
DE4414921A1 (en) 1994-04-28 1995-11-02 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
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1733802A1 (en) * 2005-06-15 2006-12-20 PAMA Papiermaschinen GmbH Device for applying a liquid or pasty suspension on paper or board webs
WO2009047209A1 (en) * 2007-10-05 2009-04-16 Basf Se Method for coating zinc-plated steel strips with aqueous formulations of acidic polymers

Also Published As

Publication number Publication date
ATE462043T1 (en) 2010-04-15
DE502004010929D1 (en) 2010-05-06
EP1496155B1 (en) 2010-03-24
DE10331145A1 (en) 2005-01-27
EP1496155A3 (en) 2007-01-03

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