EP2058433B1 - Device for transferring a flexible web of material, in particular a sheet of paper or cardboard - Google Patents

Device for transferring a flexible web of material, in particular a sheet of paper or cardboard Download PDF

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Publication number
EP2058433B1
EP2058433B1 EP08015665A EP08015665A EP2058433B1 EP 2058433 B1 EP2058433 B1 EP 2058433B1 EP 08015665 A EP08015665 A EP 08015665A EP 08015665 A EP08015665 A EP 08015665A EP 2058433 B1 EP2058433 B1 EP 2058433B1
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EP
European Patent Office
Prior art keywords
web
transfer
strip
transfer strip
tautening
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EP08015665A
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German (de)
French (fr)
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EP2058433A2 (en
EP2058433A3 (en
Inventor
Andreas Pesch
Bernhard Schmitz
Carsten Wirtz
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Andritz Kuesters GmbH
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Andritz Kuesters GmbH
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Publication of EP2058433A2 publication Critical patent/EP2058433A2/en
Publication of EP2058433A3 publication Critical patent/EP2058433A3/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine

Definitions

  • the invention relates to a device for transferring a flexible material web, in particular a paper or board web.
  • a narrow strip For transferring a paper or board web from the end of the dryer section of a paper or board machine to subsequent machine sections or machine sections, such as calenders or winders, at the end of the dryer section, a narrow strip, the so-called transfer strip, cut from the paper web and by means of a transfer device in transferred the following machine section.
  • the transfer strip is completely guided, ie threaded, through the following machine, the width of the paper web is returned to the desired dimension, namely the total width.
  • a system and method for controlling edge trim of a fibrous web is known.
  • a stabilizing device for stabilizing the residual web is provided.
  • the stabilization device adjoins the separating device in the machine direction, ie is arranged behind it.
  • the stabilization device has an effective region which extends over at least a partial region of the fibrous web web width, preferably the theoretically maximum residual breadth, which corresponds to the travel width of the severing device. This makes it possible to support the entire residual web width when guided in the collecting and / or processing device.
  • the effective range of the stabilizing device is preferably infinitely adjustable, in particular adaptable to the width of the residual web.
  • a transfer device which has a transfer flap, which is pivotally mounted on a scraper bar of a machine for producing or processing a web, in particular paper web.
  • the material web runs over the transfer flap, which is pivoted downwards in a rest position, into a catchment area, the pulper, present underneath the machine.
  • the transfer strip is cut off from the web and the transfer flap is pivoted to transfer the transfer strip.
  • the transfer strip running from the free end of the transfer flap reaches the effective region of a separating device and is thereby knocked off.
  • the transfer strip reaches the area of receiving or guiding devices that take this and thread it into the subsequent machine.
  • To support the web guide blowing devices may be provided.
  • Out DE 200 11 943 U1 is a device for transferring a flexible material web, in particular paper or board web, known, in which the material web can be divided by means of two separating elements in an edge strip extending in the direction of web travel, an adjacent transfer strip and the residual web adjacent to this transfer strip.
  • a guide device is provided in order to divert the edge strip generally laterally away from the transfer strip transversely to the web running direction.
  • a tightening device is further provided. Despite a stabilized run both the edge strip and the transfer strip it comes at the very high operating speed repeated failures during transfer of the material web.
  • the object of the invention is therefore to provide a device for transferring a flexible material web of the type mentioned, which allows a fast, successful and secure transfer of the transfer strip.
  • the residual web adjoining the transfer strip is responsible for an unstable run of the transfer strip.
  • a residual track which runs without support in the pulper, beats big waves.
  • the residual web stretched or tautened, and only in an edge region adjacent to the transfer strip the residual web in the interior area undulates unchanged, i. the paper web has the tendency to contract there.
  • the residual web rotates out of the tensioning device and moves away from the transfer flap.
  • the in the FIGS. 1 and 3 shown device for transferring a flexible material web 1 is the transfer, especially a paper or board web, from a preceding machine section 2 to a subsequent section 3 of the production and / or treatment of the web 1 serving machine, ie here a paper or board machine.
  • the preceding machine section 2 is for example a dryer section, wherein a last drying cylinder 4 in Fig. 1 is shown.
  • a subsequent section is, for example, a calender, not shown here.
  • the device for transferring a material web 1 can be used at any points of the paper or board machine, for example between calender and reel.
  • the material web 1 can be divided by means of a separating device into a transfer strip 5 extending in the web running direction L and the residual web 6 adjoining this transfer strip 5.
  • the separating device preferably comprises two separating elements, in order additionally to cut off an edge strip 7 in the web running direction L.
  • the transfer strip 5 then has clean cut edges on both sides.
  • the transfer device has a tensioning device 8, which tightens the residual web 6 on a section 9 adjacent to the transfer strip 5.
  • This section 9 extends transversely to the web running direction L and tightens the residual web 6 at its outer edge adjacent to the transfer strip 5.
  • the tensioning device 8 comprises at least one nozzle unit 10 with a plurality of juxtaposedmaschinestrahl Kunststoffdüsen or slot nozzles, which form an air guide.
  • the tensioning device 8 extends over a portion of the residual web 6, which is preferably 1 to 3 times the width of the transfer strip 5.
  • the tensioning device 8 is aligned with a transfer strip tensioning device 11 for the transfer strip 5 on a transfer flap 12.
  • the residual strip 6 is then tightened there on a section where the transfer strip 5 is knocked off for transfer to the subsequent section 3.
  • the device for transferring the flexible material web 1 has a guide 13, which is provided here at the lower peripheral region of the last drying cylinder 4 and on which the pivotable transfer flap 12 is arranged.
  • the known drive means 14 may be provided for pivoting the transfer flap 12.
  • the drying cylinder 4 is also a scraper bar 15 associated with a scraper 16, with which the material web 1 is usually scraped from the surface of the drying cylinder 4. The scraped-off material web 1 is removed before being transferred to the reject container or pulper 17.
  • FIGS. 1 and 3 show the inventive device for transferring the flexible material web 1 during transfer of the transfer strip 5 in comparison to the prior art, which in the Figures 2 and 4 is shown.
  • FIGS. 1 and 3 causes the tensioning device 8 that the residual web 6 adjacent to the transfer strip 5 not as in the prior art (see. Fig. 2 ) is scraped off by the doctor 16 of the drying cylinder 4 and then slack and thus wavy is derived in the pulper 17, but is stretched away from the drying cylinder 4, as the Fig. 1 shows.
  • the residual web 6 passes in its edge region by the tension by means of tensioning device 8 a short or straight path in the pulper 17, whereby disabilities of the transfer strip 5 during transfer are already reduced.
  • Fig. 4 shows the slack in the pulper 17 current residual web 6, which beats waves. This wave shock of the residual web 6 is suppressed by the tensioning device 8 and the residual web 6 guided in the sub-area 9 curious.
  • an edge strip 7 is cut, then this is preferably also tensioned by means of a marginal strip tensioning device 18.
  • the transfer flap 12 may be associated with a second transfer strip tensioning device 19.
  • a cutting device 20 for knocking off the transfer strip 5 is provided here.
  • guide devices 21 and / or deflection devices 22 can be provided in a known manner.
  • separating means for cutting the transfer strip 5 from the residual web 6 and preferably from the edge strip 7 a non-contact separating element, in particular Hochdruckwasserstrahl- or laser beam separating element, or a mechanical cutting element is preferably provided.

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  • Paper (AREA)
  • Advancing Webs (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

The device has a tensioning device (8) which tightens a residual web (6) on a section (9) adjacent to a transfer strip (5). The section is extended to the machine direction (L) in a transverse manner. The tensioning device has a propulsion air jet of a nozzle unit (10). The tensioning device is aligned to a transfer strip-tensioning device (11) at a transfer flap (12).

Description

Die Erfindung betrifft eine Vorrichtung zum Überführen einer flexiblen Materialbahn, insbesondere einer Papier- oder Kartonbahn.The invention relates to a device for transferring a flexible material web, in particular a paper or board web.

Zum Überführen einer Papier- oder Kartonbahn vom Ende der Trockenpartie einer Papier- oder Kartonmaschine zu nachfolgenden Maschinenabschnitten oder Maschinensektionen, wie z.B. Kalander oder Wickelapparate, wird am Ende der Trockenpartie ein schmaler Streifen, der sogenannte Überführstreifen, aus der Papierbahn geschnitten und mittels einer Überführeinrichtung in die nachfolgende Maschinensektion überführt. Sobald der Überführstreifen vollständig durch die nachfolgende Maschine geführt, d.h. eingefädelt, ist, wird die Breite der Papierbahn auf das gewünschte Maß, nämlich auf die Gesamtbreite, zurückgeführt.For transferring a paper or board web from the end of the dryer section of a paper or board machine to subsequent machine sections or machine sections, such as calenders or winders, at the end of the dryer section, a narrow strip, the so-called transfer strip, cut from the paper web and by means of a transfer device in transferred the following machine section. As soon as the transfer strip is completely guided, ie threaded, through the following machine, the width of the paper web is returned to the desired dimension, namely the total width.

Aus EP 1 903 142 A1 ist ein System und ein Verfahren zur Steuerung der Randstreifenüberführung einer Faserstoffbahn bekannt. Zur Beherrschung des Überführvorganges und des damit möglicherweise entstehenden Randfehlers am Überführstreifen ist eine Stabilisierungseinrichtung zur Stabilisierung der Restbahn vorgesehen. Die Stabilisierungseinrichtung schließt sich dabei in Maschinenrichtung an die Trenneinrichtung an, d.h. ist hinter dieser angeordnet. Die Stabilisierungseinrichtung weist einen Wirkbereich auf, der sich über wenigstens über einen Teilbereich der Faserstoffbahnbreite, vorzugsweise die theoretisch maximale Restbreite, welche der Verfahrbreite der Trenneinrichtung entspricht, erstreckt. Dadurch ist es möglich, die gesamte Restbahnbreite bei Führung in die Auffang- und/oder Aufbereitungseinrichtung zu stützen. Um immer eine volle Abstützung der Restbahn zu gewährleisten, ist vorzugsweise der Wirkbereich der Stabilisierungseinrichtung stufenlos einstellbar, insbesondere an die Breite der Restbahn anpassbar.Out EP 1 903 142 A1 For example, a system and method for controlling edge trim of a fibrous web is known. To control the transfer process and thus possibly resulting edge error on the transfer strip a stabilizing device for stabilizing the residual web is provided. The stabilization device adjoins the separating device in the machine direction, ie is arranged behind it. The stabilization device has an effective region which extends over at least a partial region of the fibrous web web width, preferably the theoretically maximum residual breadth, which corresponds to the travel width of the severing device. This makes it possible to support the entire residual web width when guided in the collecting and / or processing device. In order to always ensure full support of the residual web, the effective range of the stabilizing device is preferably infinitely adjustable, in particular adaptable to the width of the residual web.

Aus US 4,566,944 ist eine Trennvorrichtung bekannt, bei der die Faserstoffbahn benachbart zu einem Messer stabilisiert wird. Dadurch ist ein gleichmäßiger Schnitt möglich.Out US 4,566,944 For example, a separation device is known in which the fibrous web is stabilized adjacent to a knife. This makes a uniform cut possible.

Aus EP 0 767 272 B1 ist eine Überführeinrichtung bekannt, die eine Überführklappe aufweist, die schwenkbar an einem Schaberbalken einer Maschine zur Herstellung oder Verarbeitung einer Bahn, insbesondere Papierbahn, angebracht ist. Bei Inbetriebnahme der Maschine beziehungsweise bei einem Bahnabriss läuft die Materialbahn über die in einer Ruheposition nach unten verschwenkte Überführklappe in einen unterhalb der Maschine vorhandenen Auffangbereich, den Pulper. Vor Beginn eines Überführungsvorganges wird von der Bahn der Überführstreifen abgeschnitten und zum Überführen des Überführstreifens die Überführklappe verschwenkt. Dadurch gelangt der vom freien Ende der Überführklappe ablaufende Überführstreifen in den Wirkbereich einer Trennvorrichtung und wird dadurch abgeschlagen. Dabei gelangt der Überführstreifen in den Bereich von Aufnahme- oder Leiteinrichtungen, die diesen übernehmen und in die nachfolgende Maschine einfädeln. Zum Unterstützen der Bahnführung können Blaseinrichtungen vorgesehen sein. Hierbei ergibt sich aber ein relativ instabiler Lauf des Überführstreifens, was zu zeitraubenden und teuren Bahnabrissen führen kann, da der Einfädelvorgang bei der vollen, meist sehr hohen Arbeitsgeschwindigkeit durchgeführt wird, die beispielsweise im Bereich von etwa 1500 bis 2000 m/min liegen kann.Out EP 0 767 272 B1 a transfer device is known, which has a transfer flap, which is pivotally mounted on a scraper bar of a machine for producing or processing a web, in particular paper web. During commissioning of the machine or in the event of a web break, the material web runs over the transfer flap, which is pivoted downwards in a rest position, into a catchment area, the pulper, present underneath the machine. Before the beginning of a transfer process, the transfer strip is cut off from the web and the transfer flap is pivoted to transfer the transfer strip. As a result, the transfer strip running from the free end of the transfer flap reaches the effective region of a separating device and is thereby knocked off. In this case, the transfer strip reaches the area of receiving or guiding devices that take this and thread it into the subsequent machine. To support the web guide blowing devices may be provided. However, this results in a relatively unstable run of the transfer strip, which can lead to time-consuming and expensive web breaks, since the threading is carried out at the full, usually very high operating speed, which may for example be in the range of about 1500 to 2000 m / min.

Zur Verbesserung der Führung des Überführstreifens ist aus EP 0 674 045 A2 bekannt, der Überführklappe Blasdüsen zuzuordnen, um eine den Überführungsstreifen stabilisierende Luftströmung zu bilden. Hierdurch soll ein Flattern oder ein seitlicher Versatz des Überführstreifens verhindert werden. Die Streifenabschlag- und Überführeinrichtung kann praktisch an beliebigen Stellen der Papier- oder Kartonmaschine eingesetzt werden, zum Beispiel am Ende der Trockenpartie oder zwischen Glättwerk und Rollapparat. Trotz einer definierten Vorderkante des Überführstreifens wird der abgeschlagene Überführstreifen oftmals nicht von der Nachfolgeeinrichtung korrekt aufgenommen, so dass der Einfädelvorgang häufig fehlschlägt.To improve the leadership of the transfer strip is off EP 0 674 045 A2 it is known to assign blowing nozzles to the transfer flap in order to form a flow of air stabilizing the transfer strip. This is intended to prevent fluttering or lateral displacement of the transfer strip. The Streifenabschlag- and transfer device can be used virtually anywhere on the paper or board machine, for example at the end of the dryer section or between calender and reel. Despite a defined leading edge of the transfer strip, the severed transfer strip is often not picked up correctly by the follower, so the threading process often fails.

Aus DE 200 11 943 U1 ist eine Vorrichtung zum Überführen einer flexiblen Materialbahn, insbesondere Papier- oder Kartonbahn, bekannt, bei der die Materialbahn mittels zweier Trennelemente in einen sich in Bahnlaufrichtung erstreckenden Randstreifen, einen daran angrenzenden Überführstreifen sowie die an diesen Überführstreifen angrenzende Restbahn zerteilbar ist. Um den Randstreifen allgemein quer zur Bahnlaufrichtung seitlich vom Überführstreifen weg abzulenken, ist eine Leitvorrichtung vorgesehen. Um den Randstreifen gleichzeitig zu straffen, ist ferner eine Straffeinrichtung vorgesehen. Trotz eines stabilisierten Laufes sowohl des Randstreifens als auch des Überführstreifens kommt es bei der sehr hohen Arbeitsgeschwindigkeit zu wiederholten Fehlschlägen beim Überführen der Materialbahn.Out DE 200 11 943 U1 is a device for transferring a flexible material web, in particular paper or board web, known, in which the material web can be divided by means of two separating elements in an edge strip extending in the direction of web travel, an adjacent transfer strip and the residual web adjacent to this transfer strip. In order to divert the edge strip generally laterally away from the transfer strip transversely to the web running direction, a guide device is provided. In order to tighten the edge strip at the same time, a tightening device is further provided. Despite a stabilized run both the edge strip and the transfer strip it comes at the very high operating speed repeated failures during transfer of the material web.

Aufgabe der Erfindung ist es daher, eine Vorrichtung zum Überführen einer flexiblen Materialbahn der genannten Art zu schaffen, die eine schnelle, erfolgreiche und sichere Überführung des Überführstreifens erlaubt.The object of the invention is therefore to provide a device for transferring a flexible material web of the type mentioned, which allows a fast, successful and secure transfer of the transfer strip.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Hierdurch wird eine Vorrichtung zum Überführen einer flexiblen Materialbahn geschaffen, bei der sichergestellt ist, dass die restliche Papierbahn das Überführen des Überführstreifens nicht behindert. Erfindungsgemäß wurde erkannt, dass die an den Überführstreifen angrenzende Restbahn für einen instabilen Lauf des Überführstreifens verantwortlich ist. Eine Restbahn, die ohne Unterstützung in den Pulper läuft, schlägt große Wellen. Wird nun die Restbahn gespannt bzw. gestrafft, und zwar nur in einem Randbereich benachbart zum Überführstreifen, wellt sich die Restbahn im Innenbereich unverändert, d.h. die Papierbahn hat die Tendenz sich dort zusammenzuziehen. Dadurch dreht sich die Restbahn aus der Straffvorrichtung heraus und bewegt sich von der Überführklappe weg. Beim Abschlagen des Überführstreifens kann es dann zu keiner Berührung zwischen Überführstreifen und Restbahn kommen, wodurch der Aufführprozess scheitern könnte.In this way, a device for transferring a flexible material web is created, which ensures that the remaining paper web does not hinder the transfer of the transfer strip. According to the invention, it has been recognized that the residual web adjoining the transfer strip is responsible for an unstable run of the transfer strip. A residual track, which runs without support in the pulper, beats big waves. Now, if the residual web stretched or tautened, and only in an edge region adjacent to the transfer strip, the residual web in the interior area undulates unchanged, i. the paper web has the tendency to contract there. As a result, the residual web rotates out of the tensioning device and moves away from the transfer flap. When knocking off the transfer strip it can then come to no contact between transfer strip and residual web, whereby the Aufführprozess could fail.

Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention are described in the following description and the dependent claims.

Die Erfindung wird nachstehend anhand des in den beigefügten Abbildungen dargestellten Ausführungsbeispiels näher erläutert.

  • Fig. 1 zeigt schematisch eine Vorrichtung zum Überführen einer flexiblen Materialbahn von einem Trockenzylinder am Ende einer Trockenpartie zu einer nachfolgenden Maschinensektion von der Seite gemäß der vorliegenden Erfindung,
  • Fig. 2 zeigt schematisch eine Vorrichtung zum Überführen einer flexiblen Materialbahn von einem Trockenzylinder am Ende einer Trockenpartie zu einer nachfolgenden Maschinensektion von der Seite gemäß dem Stand der Technik,
  • Fig. 3 zeigt schematisch die Vorrichtung zum Überführen einer flexiblen Materialbahn gemäß Fig. 1 in einer Draufsicht,
  • Fig. 4 zeigt schematisch die Vorrichtung zum Überführen einer flexiblen Materialbahn gemäß Fig. 2 in einer Draufsicht.
The invention will be explained in more detail with reference to the embodiment shown in the accompanying drawings.
  • Fig. 1 1 schematically shows a device for transferring a flexible material web from a drying cylinder at the end of a drying section to a subsequent machine section from the side according to the present invention,
  • Fig. 2 1 schematically shows a device for transferring a flexible material web from a drying cylinder at the end of a drying section to a subsequent machine section from the side according to the prior art,
  • Fig. 3 schematically shows the device for transferring a flexible material web according to Fig. 1 in a plan view,
  • Fig. 4 schematically shows the device for transferring a flexible material web according to Fig. 2 in a top view.

Die in den Figuren 1 und 3 dargestellte Vorrichtung zum Überführen einer flexiblen Materialbahn 1 dient der Überführung, insbesondere einer Papier- oder Kartonbahn, von einer vorangehenden Maschinensektion 2 zu einer nachfolgenden Sektion 3 einer der Herstellung und/oder Behandlung der Materialbahn 1 dienenden Maschine, d.h. hier einer Papier- oder Kartonmaschine. Die vorangehende Maschinensektion 2 ist beispielsweise eine Trockenpartie, wobei ein letzter Trockenzylinder 4 in Fig. 1 dargestellt ist. Eine nachfolgende Sektion ist beispielsweise ein hier nicht dargestellter Kalander. Alternativ kann die Vorrichtung zum Überführen einer Materialbahn 1 an beliebigen Stellen der Papier- oder Kartonmaschine eingesetzt werden, beispielsweise zwischen Kalander und Rollapparat.The in the FIGS. 1 and 3 shown device for transferring a flexible material web 1 is the transfer, especially a paper or board web, from a preceding machine section 2 to a subsequent section 3 of the production and / or treatment of the web 1 serving machine, ie here a paper or board machine. The preceding machine section 2 is for example a dryer section, wherein a last drying cylinder 4 in Fig. 1 is shown. A subsequent section is, for example, a calender, not shown here. Alternatively, the device for transferring a material web 1 can be used at any points of the paper or board machine, for example between calender and reel.

Die Materialbahn 1 ist mittels einer Trenneinrichtung in einen sich in Bahnlaufrichtung L erstreckenden Überführstreifen 5 und die an diesen Überführstreifen 5 angrenzende Restbahn 6 zerteilbar. Vorzugsweise umfasst die Trenneinrichtung zwei Trennelemente, um in Bahnlaufrichtung L zusätzlich einen Randstreifen 7 abzuschneiden. Der Überführstreifen 5 besitzt dann beidseitig saubere Schnittkanten.The material web 1 can be divided by means of a separating device into a transfer strip 5 extending in the web running direction L and the residual web 6 adjoining this transfer strip 5. The separating device preferably comprises two separating elements, in order additionally to cut off an edge strip 7 in the web running direction L. The transfer strip 5 then has clean cut edges on both sides.

Die Überführvorrichtung weist eine Straffvorrichtung 8 auf, die die Restbahn 6 auf einem Teilabschnitt 9 benachbart zum Überführstreifen 5 strafft. Dieser Teilabschnitt 9 erstreckt sich quer zur Bahnlaufrichtung L und strafft die Restbahn 6 an ihrem Aussenrand benachbart zum Überführstreifen 5. Die Straffvorrichtung 8 umfasst mindestens eine Düseneinheit 10 mit mehreren nebeneinander angeordneten Treibstrahlluftdüsen oder Schlitzdüsen, die eine Luftleitführung bilden. Die Straffvorrichtung 8 erstreckt sich über einen Teilbereich der Restbahn 6, der vorzugsweise das 1- bis 3-fache der Breite des Überführstreifens 5 beträgt.The transfer device has a tensioning device 8, which tightens the residual web 6 on a section 9 adjacent to the transfer strip 5. This section 9 extends transversely to the web running direction L and tightens the residual web 6 at its outer edge adjacent to the transfer strip 5. The tensioning device 8 comprises at least one nozzle unit 10 with a plurality of juxtaposed Treibstrahlluftdüsen or slot nozzles, which form an air guide. The tensioning device 8 extends over a portion of the residual web 6, which is preferably 1 to 3 times the width of the transfer strip 5.

Die Straffvorrichtung 8 ist ausgerichtet zu einer Überführstreifen-Straffvorrichtung 11 für den Überführstreifen 5 an einer Überführklappe 12. Die Restbahn 6 wird dann dort auf einem Teilstück gestrafft, wo der Überführstreifen 5 zum Überführen auf die nachfolgende Sektion 3 abgeschlagen wird.The tensioning device 8 is aligned with a transfer strip tensioning device 11 for the transfer strip 5 on a transfer flap 12. The residual strip 6 is then tightened there on a section where the transfer strip 5 is knocked off for transfer to the subsequent section 3.

Wie anhand der Figuren zu erkennen ist, besitzt die Vorrichtung zum Überführen der flexiblen Materialbahn 1 eine Leiteinrichtung 13, die hier am unteren Umfangsbereich des letzten Trockenzylinders 4 vorgesehen ist und an der die schwenkbare Überführklappe 12 angeordnet ist. Zum Schwenken der Überführklappe 12 können die bekannten Antriebseinrichtungen 14 vorgesehen sein. Dem Trockenzylinder 4 ist dabei ferner ein Schaberbalken 15 mit einem Schaber 16 zugeordnet, mit dem die Materialbahn 1 üblicherweise von der Oberfläche des Trockenzylinders 4 abgeschabt wird. Die abgeschabte Materialbahn 1 wird vor dem Überführen in den Ausschussbehälter bzw. Pulper 17 abgeführt.As can be seen from the figures, the device for transferring the flexible material web 1 has a guide 13, which is provided here at the lower peripheral region of the last drying cylinder 4 and on which the pivotable transfer flap 12 is arranged. For pivoting the transfer flap 12, the known drive means 14 may be provided. The drying cylinder 4 is also a scraper bar 15 associated with a scraper 16, with which the material web 1 is usually scraped from the surface of the drying cylinder 4. The scraped-off material web 1 is removed before being transferred to the reject container or pulper 17.

Die Figuren 1 und 3 zeigen die erfindungsgemäße Vorrichtung zum Überführen der flexiblen Materialbahn 1 beim Überführen des Überführstreifens 5 im Vergleich zum Stand der Technik, der in den Figuren 2 und 4 dargestellt ist.The FIGS. 1 and 3 show the inventive device for transferring the flexible material web 1 during transfer of the transfer strip 5 in comparison to the prior art, which in the Figures 2 and 4 is shown.

Wie aus den Figuren 1 und 3 ersichtlich ist, bewirkt die Straffvorrichtung 8, dass die Restbahn 6 benachbart zum Überführstreifen 5 nicht wie im Stand der Technik (vgl. Fig. 2) vom Schaber 16 vom Trockenzylinder 4 abgeschabt wird und dann schlaff und damit gewellt in den Pulper 17 abgeleitet wird, sondern gespannt vom Trockenzylinder 4 abgeführt wird, wie die Fig. 1 zeigt. Die Restbahn 6 geht in ihrem Randbereich durch die Spannung mittels Straffvorrichtung 8 einen kurzen bzw. geradlinigen Weg in den Pulper 17, wodurch Behinderungen des Überführstreifens 5 beim Überführen bereits verringert werden. Zusätzlich wird mittels der Straffvorrichtung 8 erreicht, dass sich die Restbahn 6 durch die Spannung im Randbereich von dem Überführstreifen 5 wegdreht. Fig. 4 zeigt die schlaff in den Pulper 17 laufende Restbahn 6, die dabei Wellen schlägt. Dieser Wellenschlag der Restbahn 6 wird durch die Straffvorrichtung 8 unterbunden und die Restbahn 6 in dem Teilbereich 9 gespannt geführt.Like from the FIGS. 1 and 3 it can be seen causes the tensioning device 8 that the residual web 6 adjacent to the transfer strip 5 not as in the prior art (see. Fig. 2 ) is scraped off by the doctor 16 of the drying cylinder 4 and then slack and thus wavy is derived in the pulper 17, but is stretched away from the drying cylinder 4, as the Fig. 1 shows. The residual web 6 passes in its edge region by the tension by means of tensioning device 8 a short or straight path in the pulper 17, whereby disabilities of the transfer strip 5 during transfer are already reduced. In addition, it is achieved by means of the tensioning device 8 that the residual web 6 rotates away from the transfer strip 5 by the tension in the edge region. Fig. 4 shows the slack in the pulper 17 current residual web 6, which beats waves. This wave shock of the residual web 6 is suppressed by the tensioning device 8 and the residual web 6 guided in the sub-area 9 curious.

Wird ein Randstreifen 7 geschnitten, dann wird dieser vorzugsweise mittels einer Randstreifen-Straffvorrichtung 18 ebenfalls gespannt. Zum Spannen der vorderen Kante des Überführstreifens 5 beim Abschlagen kann der Überführklappe 12 eine zweite Überführstreifen-Straffvorrichtung 19 zugeordnet sein. An der Überführklappe 12 ist hier eine Schneideinrichtung 20 zum Abschlagen des Überführstreifens 5 vorgesehen. Zum Überführen des Überführstreifens 5 nach dem Abschlagen können in bekannter Weise Leiteinrichtungen 21 und/oder Umlenkeinrichtungen 22 vorgesehen sein.If an edge strip 7 is cut, then this is preferably also tensioned by means of a marginal strip tensioning device 18. For tensioning the front edge of the transfer strip 5 during knocking off, the transfer flap 12 may be associated with a second transfer strip tensioning device 19. At the transfer flap 12, a cutting device 20 for knocking off the transfer strip 5 is provided here. For transferring the transfer strip 5 after knocking off, guide devices 21 and / or deflection devices 22 can be provided in a known manner.

Als Trenneinrichtung zum Schneiden des Überführstreifens 5 von der Restbahn 6 und vorzugsweise von dem Randstreifen 7 ist vorzugsweise ein berührungslos arbeitendes Trennelement, insbesondere Hochdruckwasserstrahl- oder Laserstrahl-Trennelement, oder ein mechanisches Schneidelement vorgesehen.As separating means for cutting the transfer strip 5 from the residual web 6 and preferably from the edge strip 7, a non-contact separating element, in particular Hochdruckwasserstrahl- or laser beam separating element, or a mechanical cutting element is preferably provided.

Claims (7)

  1. Apparatus for transferring a flexible material web (1), in particular a paper or cardboard web, for a preceding (2) to a following (3) section of a machine which serves for producing and/or treating the material web (1), in which the material web (1) can be divided into a transfer strip (5) which extends in the web running direction (L) and the remaining web (6) which adjoins this transfer strip (5), a tautening apparatus (8) being provided which tautens the remaining web (6) on a part section (9) adjacent to the transfer strip (5), and the tautening apparatus (8) being oriented to a transfer-strip tautening apparatus (11) at a transfer flap (12), with the result that the remaining web (6) rotates out of the tautening apparatus (8) and moves away from the transfer flap (12).
  2. Apparatus according to Claim 1, characterized in that the part section (9) extends transversely with respect to the web running direction (L).
  3. Apparatus according to Claim 1 or 2, characterized in that the part section is from 1 time to 3 times the width of the transfer strip (5) in the transverse direction with respect to the web running direction (L).
  4. Apparatus according to one of Claims 1 to 3, characterized in that the tautening apparatus (8) comprises at least one driving-jet air nozzle of a nozzle unit (10).
  5. Apparatus according to one of Claims 1 to 4, characterized in that the material web (1) can be divided by means of a severing device into an edge strip (7) which extends in the web running direction (L), the adjoining transfer strip (5), and the remaining web (6) which adjoins the said transfer strip (5).
  6. Apparatus according to Claim 5, characterized in that a severing element which operates without contact, in particular a high-pressure water-jet severing element or a laser-beam severing element, or a mechanical cutting element is provided as severing device.
  7. Apparatus according to Claim 5 or 6, characterized in that the edge strip (7) can be tensioned by means of an edge-strip tautening apparatus (18).
EP08015665A 2007-11-10 2008-09-05 Device for transferring a flexible web of material, in particular a sheet of paper or cardboard Active EP2058433B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007053700A DE102007053700A1 (en) 2007-11-10 2007-11-10 Device for transferring a flexible material web, in particular a paper or board web

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EP2058433A2 EP2058433A2 (en) 2009-05-13
EP2058433A3 EP2058433A3 (en) 2010-05-05
EP2058433B1 true EP2058433B1 (en) 2011-08-31

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AT (1) ATE522662T1 (en)
DE (1) DE102007053700A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015001008A1 (en) * 2015-01-28 2016-07-28 Andritz Küsters Gmbh Process and apparatus for the production of wetlaid nonwovens
CN110065098B (en) * 2019-06-03 2024-03-19 江苏万宝瑞达高新技术有限公司 Scraper device for preventing missing coating or paper breakage
DE102019134691A1 (en) * 2019-12-17 2020-11-19 Voith Patent Gmbh Device and method for transferring a fibrous web

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI63800C (en) * 1982-04-27 1983-08-10 Valmet Oy PROCEDURE FOR THE PURPOSE OF EXCHANGE OF SPECIFICATIONS IN THE PAPER
DE4409660A1 (en) 1994-03-21 1994-08-18 Voith Gmbh J M Tail cutting and feeding device
DE19537173C1 (en) 1995-10-06 1996-12-19 Voith Sulzer Papiermasch Gmbh Insertion strip cutter for paper length
DE10033456A1 (en) * 2000-07-10 2002-01-24 Voith Paper Patent Gmbh For the transfer of a paper/cardboard web between machine sections an edge strip is trimmed off and diverted to a pulper and cutters are positioned to cut a transfer leader strip to draw the web through cleanly
DE20011943U1 (en) 2000-07-10 2000-09-28 Voith Sulzer Papiertech Patent Device for transferring a flexible material web
DE102006044930A1 (en) * 2006-09-22 2008-04-03 Voith Patent Gmbh System for spreading a fibrous web, method for controlling the Überführ- or edge strip transfer and machine for producing a fibrous web

Also Published As

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EP2058433A2 (en) 2009-05-13
EP2058433A3 (en) 2010-05-05
ATE522662T1 (en) 2011-09-15
DE102007053700A1 (en) 2009-05-14

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