EP0778912A1 - Device for coating a material web on both sides - Google Patents

Device for coating a material web on both sides

Info

Publication number
EP0778912A1
EP0778912A1 EP95925833A EP95925833A EP0778912A1 EP 0778912 A1 EP0778912 A1 EP 0778912A1 EP 95925833 A EP95925833 A EP 95925833A EP 95925833 A EP95925833 A EP 95925833A EP 0778912 A1 EP0778912 A1 EP 0778912A1
Authority
EP
European Patent Office
Prior art keywords
press
web
nip
roller
roll
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
EP95925833A
Other languages
German (de)
French (fr)
Other versions
EP0778912B1 (en
Inventor
Reinhard Knop
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.)
Voith Paper Jagenberg GmbH
Original Assignee
Jagenberg Papiertechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jagenberg Papiertechnik GmbH filed Critical Jagenberg Papiertechnik GmbH
Publication of EP0778912A1 publication Critical patent/EP0778912A1/en
Application granted granted Critical
Publication of EP0778912B1 publication Critical patent/EP0778912B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls

Definitions

  • the invention relates to a device for coating a material web on both sides, in particular a paper or cardboard web, according to the preamble of patent claim 1.
  • devices For the double-sided application of glue, starch, CMC, synthetic glue or pigment dispersions to paper or cardboard webs, devices are known with two press rollers mounted rotatably parallel to one another in a frame, between which a press nip is formed, through which the paper or cardboard web is guided.
  • An application and metering system is arranged on each of the press rolls, which first applies a metered film of coating material to its jacket, which is then transferred to the web in the press nip.
  • one of the two press rolls is mounted such that it can be moved circumferentially against the other in order to be able to open the press nip for drawing in a new web.
  • one of the press rolls is pivotally mounted against the other. From the press nip the web of web guide elements, for. B. guide rollers, the subsequent processing stations, z. B. a dryer supplied. For an optimal coating result, it has proven to be very important that the coated paper or cardboard web is pulled off the surfaces of the two press rolls with a stable, unchanging web course.
  • the withdrawal behavior of the web from the press rolls depends not only on the features of the coating device described above, but also on process parameters such as the application quantity and the physical parameters of the web and the coating material, in the known devices, when changing from Raw materials (web and / or coating material) unstable conditions occur when withdrawing from the press rolls with the negative effects described above.
  • the path of the web can become unstable if a coating material with considerably higher cohesion and adhesion forces after a grade change with the press roller not wrapped around it is applied, on the basis of which the web is entrained locally or completely by the unrolled press roll.
  • the invention has for its object to improve a generic coating device so that a uniform coating can be achieved even with changing web and / or coating materials.
  • the invention offers the possibility of being able to set a stable web draw-off from the press rolls with a wide variety of web and coating materials by changing the wrapping conditions on the press rolls.
  • Figure 1 shows a side view of a coating device in which the press rolls are set so that the web loops slightly around a press roll on the discharge side.
  • FIG. 2 shows the same device in a position in which the other press roll is slightly wrapped around by adjusting a press roll on the start-up side.
  • the coating device shown in the drawing is integrated in a paper machine. It consists of two press rolls 2, 3 rotatably mounted axially parallel to one another in a frame 1, one of which (press roll 2) stationary, the other (Press roll 3) is mounted so as to be movable against the first press roll 2.
  • the press roll 3 is suspended between two lateral pivot levers 4, which are mounted in the frame 1 by means of a piston-cylinder unit 5 about a pivot axis 6 in the direction of the press roll 2 and can be pivoted away therefrom.
  • the press rolls 2, 3 are rubberized on their outer surface. When the press roll 3 swivels against the press roll 2, a press nip 7 is formed, to which the paper web 8 to be coated is fed from above by a guide roller 9.
  • each press roll 2, 3 is arranged on each press roll 2, 3 and can be pivoted to the respective press roll 2, 3.
  • Each application and metering system 10, 11 preferably has an application chamber which is open towards the respective press roll 2, 3 and into which coating material is fed under pressure.
  • On the outlet side each application chamber is closed by a metering element which strips off the coating material applied to the press roll 2, 3 to the desired film thickness.
  • a metering rod with a structured surface, that is to say elevations and depressions, is preferably used as the metering element, with which metering can be carried out volumetrically. Such doctor rods are known. You assign z. B. circumferential grooves on by
  • Wrapping can be generated with a wire or by surface processing.
  • doctor rods with a smooth surface, doctor blades or doctor strips can also be used as dosing elements.
  • the coating material applied in metered amounts to the outer surfaces of the press rolls 2, 3 is transferred to the web 8 in the press nip 7. After passing through the press nip 7, the web 8 coated on both sides is fed from a non-contact guiding element 12 to a dryer, not shown.
  • the pivotably mounted press roll 3 by one component in the direction of the common men tangent to the two press rolls 2, 3 in the press nip 7 adjustably mounted.
  • the adjustability is brought about by the fact that the swiveling press roll 3 is additionally mounted such that it can be adjusted in height.
  • a piston supported on the ground engages on the pivot bearing 1 3 guided in a linear guide.
  • Cylinder unit 14 with which the swivel lever 4 can be adjusted up and down.
  • the press roll 3 can thus be pivoted on an adjustable track against the stationary press roll 2. Raising the pivot lever 4 causes the position of the press nip 7 to move upward. The changed position of the press nip leads to a wrapping of the press roll 2 on the outlet side of the
  • Lane 8 ( Figure 2). Similarly, a lowering of the pivot lever 4 leads to a displacement of the press nip 7 downward and thus to the fact that the press roller 3 is partially wrapped around by the web 8 on the outlet side (FIG. 1).
  • the maximum stroke of the piston-cylinder unit 14 and the length of the swivel lever 4 are selected so that when the piston is half extended, the web passes through the press nip 7 in a straight line without wrapping a press roll 2, 3.
  • the stroke length of the piston-cylinder unit 14 is dimensioned such that when the piston is retracted, the press roller 3 is lowered to such an extent that the connecting line between the two axes of rotation of the press rollers 2, 3 swings around the axis of rotation of the press roller 2 by 5 ° -10 ° ( Figure 1). In this position, the swivel-mounted press roll 3 is slightly wrapped around by the web 8 on the run-up side of the press nip 7.
  • the press roller 3 is raised to such an extent that the connecting line between the two axes of rotation of the press rollers 2, 3 is 5 * - 10 * relative to the position with a straight line
  • Track 8 is pivoted upward ( Figure 2). In this position, the stationary press roll 2 is slightly wrapped around by the web 8 on the outlet side of the press nip 7.
  • the web is first drawn off from the press roll 2 and then from the press roll 3. If a coating material with greater cohesion and adhesion than the coating material applied by the press roller 3 is now applied with the press roller 2 after a type change, this would lead to an unstable web path: the cohesion and adhesion forces hold the web 8 longer the press roller 2, the web guide with the slight wrapping of the press roller 3 holds the web longer on the press roller 3. The holding forces are thus opposed. In order to stabilize the course of the web again in this situation, the press roll 3 is moved into that shown in FIG.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PCT No. PCT/EP95/02602 Sec. 371 Date Feb. 28, 1997 Sec. 102(e) Date Feb. 28, 1997 PCT Filed Jul. 5, 1995 PCT Pub. No. WO96/07791 PCT Pub. Date Mar. 14, 1996A device for two-sided coating of a web includes a pair of pressure rollers forming a nip therebetween, one of the rollers is shiftable along a direction of the common tangent of both rollers for the adjustment of the nip.

Description

B E S C H R E I B U N G DESCRIPTION
Vorrichtung zum beidseitigen Beschichten einer MaterialbahnDevice for coating a material web on both sides
Technisches GebietTechnical field
Die Erfindung betrifft eine Vorrichtung zum beidseitigen Beschichten einer Material¬ bahn, insbesondere einer Papier- oder Kartonbahn, gemäß dem Oberbegriff des Patentanspruchs 1 .The invention relates to a device for coating a material web on both sides, in particular a paper or cardboard web, according to the preamble of patent claim 1.
Zum beidseitigen Auftragen von Leim, Stärke, CMC, synthetischem Leim oder Pigmentdispersionen auf Papier- oder Kartonbahnen sind Vorrichtungen mit zwei achsparallel nebeneinander in einem Gestell drehbar gelagerten Presswalzen bekannt, zwischen denen ein Preßspalt ausgebildet ist, durch den die Papier- oder Kartonbahn geführt wird. An jeder der Presswalzen ist ein Auftrag- und Dosiersystem angeordnet, das einen dosierten Film von Beschichtungsmaterial zunächst auf deren Mantel auf- trägt, der anschließend in dem Preßspalt an die Bahn übergeben wird. Bekann¬ terweise ist eine der beiden Presswalzen umfänglich gegen die andere bewegbar gelagert, um den Preßspalt zum Einziehen einer neuen Bahn öffnen zu können.For the double-sided application of glue, starch, CMC, synthetic glue or pigment dispersions to paper or cardboard webs, devices are known with two press rollers mounted rotatably parallel to one another in a frame, between which a press nip is formed, through which the paper or cardboard web is guided. An application and metering system is arranged on each of the press rolls, which first applies a metered film of coating material to its jacket, which is then transferred to the web in the press nip. As is known, one of the two press rolls is mounted such that it can be moved circumferentially against the other in order to be able to open the press nip for drawing in a new web.
Stand der TechnikState of the art
Bei der gattungsgemäßen Vorrichtung nach der DE-C 34 40 634 ist eine der Press¬ walzen gegen die andere schwenkbar gelagert. Aus dem Preßspalt heraus wird die Bahn von Bahnführungselementen, z. B. Leitwalzen, den nachfolgenden Verarbei¬ tungsstationen, z. B. einem Trockner, zugeführt. Für ein optimales Beschichtungsergebnis hat es sich als sehr wichtig gezeigt, daß die beschichtete Papier- oder Kartonbahn von den Oberflächen der beiden Presswalzen mit einem stabilen, sich nicht ändernden Bahnverlauf abgezogen wird. Die vonIn the generic device according to DE-C 34 40 634, one of the press rolls is pivotally mounted against the other. From the press nip the web of web guide elements, for. B. guide rollers, the subsequent processing stations, z. B. a dryer supplied. For an optimal coating result, it has proven to be very important that the coated paper or cardboard web is pulled off the surfaces of the two press rolls with a stable, unchanging web course. The of
Kohäsions- und Adhäsionskräften an den Walzen gehaltene Bahn muß möglich gleich¬ mäßig zunächst von der einen, dann von der zweiten Walze abgezogen werden, ohne daß ein unkontrollierter Bahnverlauf, d. h. ein Bahnflattern zwischen den beiden Presswalzen, entsteht. Ein unkontrollierter Bahnverlauf führt zu nachteilhaften Oberflächenmarkierungen.Cohesive and adhesive forces on the web held by the rollers must possibly be pulled off evenly first from one roller and then from the second, without an uncontrolled web path, i. H. a web flutter occurs between the two press rolls. An uncontrolled course of the path leads to disadvantageous surface markings.
Um die Bahn kontrolliert zunächst von der einen, dann von der anderen Presswalze abzuziehen, ist es bekannt, mit unterschiedlichen Materialien auf den Oberflächen der Presswalzen die beim Abziehen der Bahn wirkenden Adhäsionskräfte gezielt zu beein- flussen. Die Lösung hat jedoch den Nachteil, daß die unterschiedlichen Walzenober¬ flächen auch zu qualitativ unterschiedlichen Strichergebnissen auf beiden Bahnseiteπ führen können.In order to remove the web from one press roller, then from the other, in a controlled manner, it is known to influence the adhesive forces when the web is pulled off in a targeted manner with different materials on the surfaces of the press rollers. However, the solution has the disadvantage that the different roller surfaces can also lead to qualitatively different coating results on both web sides.
Eine weitere bekannte Möglichkeit besteht darin, die Bahn nach dem Preßspalt auf einer der beiden Presswalzen unter einem bestimmten Umschlingungswinkel weiter¬ zuführen (DE-C 34 40 634). Erfahrungsgemäß muß dabei eine bestimmte Bahnzug¬ kraft bei einem nicht zu großen Umschlingungswinkel eingestellt werden.Another known possibility is to continue the web after the press nip on one of the two press rolls at a certain wrap angle (DE-C 34 40 634). Experience has shown that a certain web tensile force must be set at a wrap angle that is not too large.
Darstellung der ErfindungPresentation of the invention
Da das Abzugsverhalten der Bahn von den Presswalzen nicht nur von den vorstehend beschriebenen Merkmalen der Beschichtungsvorrichtung, sondern auch von Proze߬ parametern wie der Auftragmenge und den physikalischen Parametern der Bahn und des Beschichtungsmaterials entscheidend abhängt, können bei den bekannten Vor- richtungen bei einem Wechsel von Rohstoffen (Bahn- und/oder Beschichtungs¬ material) instabile Verhältnisse beim Abzug von den Presswalzen mit den vorstehend beschriebenen negativen Auswirkungen auftreten. So kann der Bahnverlauf instabil werden, wenn nach einer Sortenumstellung mit der nicht umschlungenen Presswalze ein Beschichtungsmaterial mit erheblich größeren Kohäsions- und Adhäsionskräften aufgetragen wird, aufgrund derer die Bahn lokal oder komplett von der nicht um¬ schlungenen Presswalze mitgerissen wird.Since the withdrawal behavior of the web from the press rolls depends not only on the features of the coating device described above, but also on process parameters such as the application quantity and the physical parameters of the web and the coating material, in the known devices, when changing from Raw materials (web and / or coating material) unstable conditions occur when withdrawing from the press rolls with the negative effects described above. Thus, the path of the web can become unstable if a coating material with considerably higher cohesion and adhesion forces after a grade change with the press roller not wrapped around it is applied, on the basis of which the web is entrained locally or completely by the unrolled press roll.
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Beschichtungsvor- richtung so zu verbessern, daß sich eine gleichmäßige Beschichtung auch bei wechselnden Bahn- und/oder Beschichtungsmaterialien erzielen läßt.The invention has for its object to improve a generic coating device so that a uniform coating can be achieved even with changing web and / or coating materials.
Diese Aufgabe wird mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with the features of patent claim 1.
Die Erfindung bietet die Möglichkeit, bei unterschiedlichsten Bahn- und Beschich¬ tungsmaterialien einen stabilen Bahnabzug von den Presswalzen durch Veränderung der Umschlingungsverhältnisse an den Presswalzen einstellen zu können.The invention offers the possibility of being able to set a stable web draw-off from the press rolls with a wide variety of web and coating materials by changing the wrapping conditions on the press rolls.
Die Unteransprüche enthalten bevorzugte, da besonders vorteilhafte Ausgestaltungen der Erfindung.The subclaims contain preferred, since particularly advantageous, embodiments of the invention.
Kurze Beschreibung der ZeichnungBrief description of the drawing
Die Zeichnung dient zur Erläuterung der Erfindung anhand eines vereinfacht darge¬ stellten Ausführungsbeispiels.The drawing serves to explain the invention on the basis of a simplified exemplary embodiment.
Figur 1 zeigt in Seitenansicht eine Beschichtungsvorrichtung, bei der die Presswalzen so eingestellt sind, daß die Bahn eine Preßwalze an der Ablaufseite geringfügig umschlingt.Figure 1 shows a side view of a coating device in which the press rolls are set so that the web loops slightly around a press roll on the discharge side.
Figur 2 zeigt dieselbe Vorrichtung in einer Position, bei der durch Verstellung einer Presswalze an der Anlaufseite die andere Presswalze geringfügig umschlungen wird.FIG. 2 shows the same device in a position in which the other press roll is slightly wrapped around by adjusting a press roll on the start-up side.
Wege zur Ausführung der ErfindungWays of Carrying Out the Invention
Die in der Zeichnung dargestellte Beschichtungsvorrichtung ist in eine Papiermaschine integriert. Sie besteht aus zwei achsparallel nebeneinander in einem Gestell 1 drehbar gelagerten Presswalzen 2, 3, von denen eine (Presswalze 2) ortsfest, die andere (Presswalze 3) umfänglich gegen die erste Presswalze 2 bewegbar gelagert ist. Im vorliegenden Beispiel ist die Presswalze 3 zwischen zwei seitlichen Schwenkhebeln 4 aufgehängt, die mittels einer Kolben-Zylinder-Einheit 5 um eine Schwenkachse 6 in Richtung zur Presswalze 2 und von dieser weg schwenkbar im Gestell 1 gelagert sind. Die Presswalzen 2, 3 sind auf ihrer Mantelfläche gummiert. Beim Anschwenken der Presswalze 3 gegen die Presswalze 2 bildet sich ein Preßspalt 7, dem die zu be¬ schichtende Papierbahn 8 von einer Leitrolle 9 von oben zugeführt wird.The coating device shown in the drawing is integrated in a paper machine. It consists of two press rolls 2, 3 rotatably mounted axially parallel to one another in a frame 1, one of which (press roll 2) stationary, the other (Press roll 3) is mounted so as to be movable against the first press roll 2. In the present example, the press roll 3 is suspended between two lateral pivot levers 4, which are mounted in the frame 1 by means of a piston-cylinder unit 5 about a pivot axis 6 in the direction of the press roll 2 and can be pivoted away therefrom. The press rolls 2, 3 are rubberized on their outer surface. When the press roll 3 swivels against the press roll 2, a press nip 7 is formed, to which the paper web 8 to be coated is fed from above by a guide roller 9.
Außerhalb des Bereichs des Preßspalts 7 ist an jeder Presswalze 2, 3 ein Auftrag- und Dosiersystem 10, 1 1 angeordnet, das an die jeweilige Presswalze 2, 3 an¬ schwenkbar ist. Bevorzugt weist jedes Auftrag- und Dosiersystem 10, 1 1 eine zur jeweiligen Presswalze 2, 3 hin offene Auftragkammer auf, in die Beschichtungs- material unter Druck zugeführt wird. Auslaufseitig wird jede Auftragkammer von einem Dosierelement abgeschlossen, das das auf die Presswalze 2, 3 aufgetragene Beschichtungsmaterial bis auf die gewünschte Filmdicke abstreift. Als Dosierelement wird bevorzugt eine Rakelstange mit strukturierter, also Erhebungen und Vertiefungen aufweisender Oberfläche eingesetzt, mit der volumetrisch dosiert werden kann. Derartige Rakelstangen sind bekannt. Sie weisen z. B. Umfangsrillen auf, die durchOutside the area of the press nip 7, an application and metering system 10, 11 is arranged on each press roll 2, 3 and can be pivoted to the respective press roll 2, 3. Each application and metering system 10, 11 preferably has an application chamber which is open towards the respective press roll 2, 3 and into which coating material is fed under pressure. On the outlet side, each application chamber is closed by a metering element which strips off the coating material applied to the press roll 2, 3 to the desired film thickness. A metering rod with a structured surface, that is to say elevations and depressions, is preferably used as the metering element, with which metering can be carried out volumetrically. Such doctor rods are known. You assign z. B. circumferential grooves on by
Umwickeln mit einem Draht oder durch Oberflächenbearbeitung erzeugt werden. Alternativ können als Dosierelemente auch Rakelstangen mit glatter Oberfläche, Schabermesser oder Schaberleisten eingesetzt werden.Wrapping can be generated with a wire or by surface processing. Alternatively, doctor rods with a smooth surface, doctor blades or doctor strips can also be used as dosing elements.
Das dosiert auf die Mantelflächen der Presswalzen 2, 3 aufgetragene Beschich¬ tungsmaterial wird im Preßspalt 7 an die Bahn 8 übergeben. Nach dem Durchlaufen des Preßspalts 7 wird die beidseitig beschichtete Bahn 8 von einem berührungslos arbeitenden Leitelement 1 2 einem nicht dargestellten Trockner zugeführt.The coating material applied in metered amounts to the outer surfaces of the press rolls 2, 3 is transferred to the web 8 in the press nip 7. After passing through the press nip 7, the web 8 coated on both sides is fed from a non-contact guiding element 12 to a dryer, not shown.
Um verschiedene Umschlingungsverhältnisse der Bahn 8 an den Presswalzen 2, 3 ohne Veränderung des übrigen Bahnverlaufs einstellen zu können, ist eine der beiden Presswalzen 2, 3, bevorzugt - wie beim Ausführungsbeispiel dargestellt - die schwenkbar gelagerte Presswalze 3 um eine Komponente in Richtung der gemeinsa¬ men Tangente an die beiden Presswalzen 2, 3 im Preßspalt 7 verstellbar gelagert. Im Ausführungsbeispiel wird die Verstellbarkeit dadurch bewirkt, daß die schwenk¬ bare Presswalze 3 zusätzlich höhenverstellbar gelagert ist. Dazu greift an dem in einer Linearführung geführten Schwenklager 1 3 eine am Boden abgestützte Kolben-In order to be able to set different looping ratios of the web 8 on the press rolls 2, 3 without changing the remaining course of the web, one of the two press rolls 2, 3 is preferred, as shown in the exemplary embodiment, the pivotably mounted press roll 3 by one component in the direction of the common men tangent to the two press rolls 2, 3 in the press nip 7 adjustably mounted. In the exemplary embodiment, the adjustability is brought about by the fact that the swiveling press roll 3 is additionally mounted such that it can be adjusted in height. For this purpose, a piston supported on the ground engages on the pivot bearing 1 3 guided in a linear guide.
Zylinder-Einheit 14 an, mit der sich der Schwenkhebel 4 nach oben und unten ver¬ stellen läßt. Die Presswalze 3 ist so auf einer verstellbaren Bahn gegen die ortsfeste Presswalze 2 anschwenkbar. Eine Anhebung des Schwenkhebels 4 bewirkt, daß sich die Position des Preßspalts 7 nach oben verschiebt. Die veränderte Position des Preßspalts führt zu einer Umschlingung der Presswalze 2 an der Auslaufseite derCylinder unit 14 with which the swivel lever 4 can be adjusted up and down. The press roll 3 can thus be pivoted on an adjustable track against the stationary press roll 2. Raising the pivot lever 4 causes the position of the press nip 7 to move upward. The changed position of the press nip leads to a wrapping of the press roll 2 on the outlet side of the
Bahn 8 (Figur 2). Analog führt eine Absenkung des Schwenkhebels 4 zu einer Verschiebung des Preßspalts 7 nach unten und somit dazu, daß die Presswalze 3 an der Auslaufseite teilweise von der Bahn 8 umschlungen wird (Figur 1 ).Lane 8 (Figure 2). Similarly, a lowering of the pivot lever 4 leads to a displacement of the press nip 7 downward and thus to the fact that the press roller 3 is partially wrapped around by the web 8 on the outlet side (FIG. 1).
Der maximale Hub der Kolben-Zylinder-Einheit 14 und die Länge der Schwenkhebel 4 sind so gewählt, daß bei zur Hälfte ausgefahrenem Kolben die Bahn gradlinig ohne Umschlingung einer Presswalze 2, 3 den Preßspalt 7 durchläuft. Die Hublänge der Kolben-Zylinder-Einheit 14 ist so bemessen, daß beim Einfahren des Kolbens die Presswalze 3 soweit abgesenkt wird, daß die Verbindungslinie zwischen den beiden Drehachsen der Presswalzen 2, 3 um die Drehachse der Preßwalze 2 um 5 ° - 10 ° abschwenkt (Figur 1 ). In dieser Position wird die schwenkbar gelagerte Preßwalze 3 an der Anlaufseite des Preßspalts 7 geringfügig von der Bahn 8 umschlungen. Bei maximal ausgefahrenen Kolben der Kolben-Zylinder-Einheit 14 wird die Presswalze 3 soweit angehoben, daß die Verbindungslinie zwischen den beiden Drehachsen der Presswalzen 2, 3 um 5 * - 10* gegenüber der Position mit gradlinig durchlaufenderThe maximum stroke of the piston-cylinder unit 14 and the length of the swivel lever 4 are selected so that when the piston is half extended, the web passes through the press nip 7 in a straight line without wrapping a press roll 2, 3. The stroke length of the piston-cylinder unit 14 is dimensioned such that when the piston is retracted, the press roller 3 is lowered to such an extent that the connecting line between the two axes of rotation of the press rollers 2, 3 swings around the axis of rotation of the press roller 2 by 5 ° -10 ° (Figure 1). In this position, the swivel-mounted press roll 3 is slightly wrapped around by the web 8 on the run-up side of the press nip 7. When the piston of the piston-cylinder unit 14 is extended to the maximum, the press roller 3 is raised to such an extent that the connecting line between the two axes of rotation of the press rollers 2, 3 is 5 * - 10 * relative to the position with a straight line
Bahn 8 nach oben geschwenkt ist (Figur 2). In dieser Position wird die ortsfest gelagerte Presswalze 2 auf der Auslaufseite des Preßspalts 7 geringfügig von der Bahn 8 umschlungen.Track 8 is pivoted upward (Figure 2). In this position, the stationary press roll 2 is slightly wrapped around by the web 8 on the outlet side of the press nip 7.
Bei der in Figur 1 gezeigten Position wird die Bahn zunächst von der Presswalze 2 und anschließend von der Presswalze 3 abgezogen. Wird nun nach einem Sorten¬ wechsel mit der Presswalze 2 ein Beschichtungsmaterial mit größerer Kohäsion und Adhäsion aufgetragen als das von der Presswalze 3 aufgetragene Beschichtungs¬ material, so würde dies zu einem instabilen Bahnverlauf führen: Die Kohäsions- und Adhäsionskräfte halten die Bahn 8 länger an der Presswalze 2, die Bahnführung mit der geringfügigen Umschlingung der Presswalze 3 hält die Bahn länger an der Presswalze 3. Die Haltekräfte sind somit entgegengesetzt. Um in dieser Situation den Bahnverlauf wieder zu stabilisieren, wird die Presswalze 3 in die in Figur 2 gezeigteIn the position shown in FIG. 1, the web is first drawn off from the press roll 2 and then from the press roll 3. If a coating material with greater cohesion and adhesion than the coating material applied by the press roller 3 is now applied with the press roller 2 after a type change, this would lead to an unstable web path: the cohesion and adhesion forces hold the web 8 longer the press roller 2, the web guide with the slight wrapping of the press roller 3 holds the web longer on the press roller 3. The holding forces are thus opposed. In order to stabilize the course of the web again in this situation, the press roll 3 is moved into that shown in FIG
Stellung angehoben. Dabei ändert sich die Bahnführung so, daß nun die Presswalze 2 geringfügig auf der Auslaufseite des Preßspalts 7 umschlungen ist. Die aus der Bahnführung resultierenden Kräfte wirken nun ebenso wie die Kohäsions- und Adhäsionskräfte dahingehend, die Bahn länger auf der Presswalze 2 zu halten. Der Bahnverlauf ist stabil, da die Bahn 8 eindeutig zunächst von der Presswalze 3, dann von der Presswalze 2 abgezogen wird. Position raised. The web guidance changes in such a way that the press roll 2 is wrapped slightly on the outlet side of the press nip 7. The forces resulting from the web guide, like the cohesive and adhesive forces, now act to keep the web longer on the press roll 2. The path of the web is stable since the web 8 is clearly drawn off first from the press roll 3, then from the press roll 2.

Claims

PATENTANS PRÜCHE PATENTAN'S SAYING
1.1.
Vorrichtung zum beidseitigen Beschichten einer Materialbahn (8), insbesondere einer Papier- oder Kartonbahn, mit zwei achsparallel nebeneinander in einem Gestell (1) drehbar gelagerten Press¬ walzen (2, 3), von denen eine (Presswalze 3) umfänglich gegen die andere (Presswal- ze 2) bewegbar gelagert ist, um einen Preßspalt (7) zu bilden, durch den die Material¬ bahn (8) geführt wird, und mit einem Auftrag- und Dosiersystem (10, 11) für jede Presswalze (2, 3) die jeweils ausserhalb des Bereichs des Preßspalts (7) angeordnet sind, d adurch gekennzeichnet, daß eine der beiden Presswalzen (3) zur Verstellung des Preßspalts (7) mit einer Komponente in Richtung der gemeinsa- men Tangente an die beiden Presswalzen (2, 3) im Preßspalt (7) verstellbar gelagert ist.Device for coating a material web (8) on both sides, in particular a paper or cardboard web, with two press rollers (2, 3) rotatably mounted axially parallel next to each other in a frame (1, 3), one of which (press roller 3) circumferentially against the other ( Press roll 2) is movably mounted to form a press nip (7) through which the material web (8) is guided and with an application and metering system (10, 11) for each press roll (2, 3) which are each arranged outside the area of the press nip (7), characterized in that one of the two press rolls (3) for adjusting the press nip (7) with a component in the direction of the common tangent to the two press rolls (2, 3 ) is adjustably mounted in the press nip (7).
2.Second
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eine der beiden Presswalzen (3) linear höhenverstellbar gelagert ist.Apparatus according to claim 1, characterized in that one of the two press rolls (3) is linearly adjustable in height.
3.Third
Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine Presswalze (2) ortsfest gelagert, die andere Presswalze (3) umfänglich auf verstellbaren Bahnen gegen die ortsfest gelagerte Presswalze (2) anschwenkbar gelagert ist. Apparatus according to claim 1 or 2, characterized in that one press roller (2) is mounted in a stationary manner, the other press roller (3) is pivotally mounted on adjustable tracks against the fixedly mounted press roller (2).
4.4th
Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeich- n e t, daß der Verstellweg der Verstellbewegung so ausgelegt ist, daß die Ver¬ bindungslinie zwischen den beiden Drehachsen der Presswalzen (2, 3) um eine der Drehachsen in beide Richtungen um 5° - 10" schwenkbar ist.Device according to one of claims 1 to 3, characterized in that the adjustment path of the adjustment movement is designed such that the connecting line between the two axes of rotation of the press rollers (2, 3) about one of the axes of rotation in both directions by 5 ° - 10 "is pivotable.
5. Vorrichtung nach einem der Ansprüche 1 bis4, dadurch gekenn¬ zei chnet, daß an jeder Preßwalze (2, 3) ein Auftrag- und Dosiersystem (10, 11) außerhalb des Bereichs des Preßspalts (7) angeordnet ist. 5. Device according to one of claims 1 to 4, characterized gekenn¬ zei chnet that on each press roll (2, 3) an application and metering system (10, 11) is arranged outside the area of the press nip (7).
EP95925833A 1994-09-02 1995-07-05 Device for coating a material web on both sides Expired - Lifetime EP0778912B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4431202A DE4431202A1 (en) 1994-09-02 1994-09-02 Device for coating a material web on both sides
DE4431202 1994-09-02
PCT/EP1995/002602 WO1996007791A1 (en) 1994-09-02 1995-07-05 Device for coating a material web on both sides

Publications (2)

Publication Number Publication Date
EP0778912A1 true EP0778912A1 (en) 1997-06-18
EP0778912B1 EP0778912B1 (en) 2000-02-09

Family

ID=6527203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95925833A Expired - Lifetime EP0778912B1 (en) 1994-09-02 1995-07-05 Device for coating a material web on both sides

Country Status (7)

Country Link
US (1) US5803969A (en)
EP (1) EP0778912B1 (en)
AT (1) ATE189724T1 (en)
DE (2) DE4431202A1 (en)
ES (1) ES2143639T3 (en)
FI (1) FI111399B (en)
WO (1) WO1996007791A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI111134B (en) * 1997-03-13 2003-06-13 Metso Paper Inc Method and apparatus for preventing vibration of rollers in a film press
DE10012465A1 (en) 2000-03-15 2001-10-11 Jagenberg Papiertech Gmbh Assembly for coating the surfaces of a paper/cardboard web at the papermaking machine has a setting unit to act on the press rollers against their springs to give a low linear pressure in the press gap
DE50214376D1 (en) * 2001-05-23 2010-05-27 Voith Patent Gmbh Arrangement for pressing two mutually approachable axially parallel rolls in a device for producing or / and treating a material web
DE102004039162B4 (en) * 2004-08-11 2013-03-14 Horst Sprenger Gmbh Apparatus for coating paper and board webs
CA2648454C (en) * 2008-01-02 2016-06-28 Dunkirk Metal Products, Inc. High efficiency wood or biomass boiler
TW201446474A (en) * 2013-06-07 2014-12-16 Hon Hai Prec Ind Co Ltd Apparatus for manufacturing light guide plate
DE202014104981U1 (en) 2014-10-20 2014-11-05 Valmet Technologies, Inc. Arrangement for retrofitting a fiber web machine with an application for a treatment medium

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1282265A (en) * 1970-01-19 1972-07-19 Gaf Corp Production of liquid films
DE3440634C2 (en) * 1984-11-07 1986-09-11 J.M. Voith Gmbh, 7920 Heidenheim Device for double-sided coating of moving webs
DE3540402C2 (en) * 1984-11-07 1995-05-11 Voith Gmbh J M Device for coating running webs
DE3701670A1 (en) * 1987-01-22 1988-08-04 Voith Gmbh J M Applicator mechanism for coating and moistening travelling material webs
DE9100291U1 (en) * 1991-01-11 1991-04-04 Jagenberg AG, 40476 Düsseldorf Device for coating a material web on both sides
FI93884C (en) * 1992-04-10 1995-06-12 Valmet Paper Machinery Inc Application beam in a glue press
DE4218596C2 (en) * 1992-06-05 1996-05-02 Voith Gmbh J M Coating device for indirect application of coating color on a paper or cardboard web
CH690764A5 (en) * 1993-01-19 2001-01-15 Hans Brunner Supporting structure for the manipulation of sacks for agricultural products, particularly for seed potatoes
FI93044C (en) * 1993-01-22 1995-02-10 Valmet Paper Machinery Inc The size press
DE4312877A1 (en) * 1993-04-20 1994-10-27 Heidelberger Druckmasch Ag Switchable coating supply on finishing units in rotary printing machines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9607791A1 *

Also Published As

Publication number Publication date
US5803969A (en) 1998-09-08
DE59507794D1 (en) 2000-03-16
FI970860A0 (en) 1997-02-28
ATE189724T1 (en) 2000-02-15
WO1996007791A1 (en) 1996-03-14
DE4431202A1 (en) 1996-03-07
FI970860A (en) 1997-02-28
FI111399B (en) 2003-07-15
ES2143639T3 (en) 2000-05-16
EP0778912B1 (en) 2000-02-09

Similar Documents

Publication Publication Date Title
DE3539980C2 (en) Method and device for controlling a paper web rewinder
DE2503423C3 (en) Cord opening device for the manufacture of cigarette filters
EP0706592B1 (en) Process and device for producing paper webs coated on both sides
DE3512268A1 (en) DEVICE FOR WINDING A MATERIAL SHEET, ESPECIALLY A PAPER SHEET, ON A SLEEVE
DE2949840A1 (en) SELECTIVELY CONVERTABLE METHOD FOR TREATING A MOVING MATERIAL RAIL AND DEVICE FOR ITS IMPLEMENTATION
EP0778912B1 (en) Device for coating a material web on both sides
EP0160165B1 (en) Method and apparatus to form a cotton lap-roll
DE4014647C2 (en) Device for applying a coating to a running web
AT401073B (en) COATING DEVICE FOR RAILWAYS, ESPECIALLY PAPER OR CARDBOARD
EP0663361B1 (en) Pope reel winder for a papermaking machine
DE4211401A1 (en) Coating device for webs of paper or cardboard
DE19714645A1 (en) Web coating station roller
EP0450311A1 (en) Winder to roll up paper webs
DE69400357T2 (en) Size press
DE1299999B (en) Machine for coating paper with coating slip
EP0757129B1 (en) Application system for a device for coating a paper or paperboard sheet
EP0901839A2 (en) Device for applying fluids onto a substrate
AT506528A2 (en) METHOD AND ARRANGEMENT FOR PRODUCING MULTILAYER PAINTED PAPER
EP0933320B1 (en) Reel winder
DE19527902B4 (en) Application system for a device for coating a paper or cardboard web
DE60009921T2 (en) METHOD FOR CHANGING THE LINEAR LOAD IN A WRAPPING MACHINE
DE866303C (en) Device for covering paper u. like
CH187189A (en) Device for applying a coating to a moving web of material.
WO2001068269A1 (en) Device for coating a material web, especially paper or cardboard web
AT203203B (en) Device for cross-cutting of continuously supplied strip material when changing rolls

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19970125

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE ES FR GB IT LI SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19990519

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IT LI SE

REF Corresponds to:

Ref document number: 189724

Country of ref document: AT

Date of ref document: 20000215

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20000222

REF Corresponds to:

Ref document number: 59507794

Country of ref document: DE

Date of ref document: 20000316

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2143639

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000731

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020628

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020711

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20020722

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030705

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030707

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030705

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030707

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050705

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080722

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20080715

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20080714

Year of fee payment: 14

EUG Se: european patent has lapsed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100202

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090705

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090706