EP1905893A1 - Machine for manufacturing a corrugated cardboard sheet clad on at least one side and tension roller for such a machine - Google Patents

Machine for manufacturing a corrugated cardboard sheet clad on at least one side and tension roller for such a machine Download PDF

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Publication number
EP1905893A1
EP1905893A1 EP07013635A EP07013635A EP1905893A1 EP 1905893 A1 EP1905893 A1 EP 1905893A1 EP 07013635 A EP07013635 A EP 07013635A EP 07013635 A EP07013635 A EP 07013635A EP 1905893 A1 EP1905893 A1 EP 1905893A1
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EP
European Patent Office
Prior art keywords
web
core
roller
annular
machine
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
EP07013635A
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German (de)
French (fr)
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EP1905893B1 (en
Inventor
Alfons Gnan
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.)
BHS Corrugated Maschinen und Anlagenbau GmbH
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BHS Corrugated Maschinen und Anlagenbau GmbH
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/12—Making corrugated paper or board
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B31F1/2877—Pressing means for bringing facer sheet and corrugated webs into contact or keeping them in contact, e.g. rolls, belts

Definitions

  • the invention relates to a machine for producing a corrugated cardboard web laminated on at least one side according to the preamble of claim 1 and a tensioning roller for such a machine according to the preamble of claim 7.
  • the pressing device on a usually woven, sieve-like pressure belt.
  • the tension roller is cylindrical in the usual way and completely rigid in itself, then occurs after a relatively short operating time of the band, at least before the normal wear of the Anpressbandes, a low elongation in the central region of the pressure belt, resulting in a reduction of the contact pressure of the pressure belt leads to the central region of the corrugated cardboard to be produced.
  • the consequence is that the gluing between laminating web and corrugated paper web may not be sufficient, which leads to corresponding quality defects of the corrugated web.
  • the tension rollers have also already been performed crowned, which is to be understood by a slight decrease in diameter from the center of the roller to its axial outer ends. However, this has not led to the desired improvement.
  • the invention is therefore the object of a machine of the generic type in such a way that the tension in the pressure belt is maintained over its full width during the operating time.
  • the outer shell of the tension roller can bend slightly towards the outer ends in operation under the tension of the Anpressbandes radially in the direction of the axis.
  • this does not lead to different peripheral velocities on the surface of the tensioning roller over its full axial length, since the circumference of the tensioning roller, unlike a crowned configuration, remains unchanged over the length of the tensioning roller, even during the deflection.
  • the tensile force exerted on the pressure belt is constant over the width of the pressure belt, so that there is no greater expansion of the pressure belt in its middle region compared to the outer side regions. So there is no increased wear in the middle of the Anpressbandes.
  • the quality of the corrugated web is thus constant over the entire extended service life of the pressure belt over the full width.
  • the claims 2 to 4 give advantageous embodiments again.
  • the claims 5 and 6 give a possibility again to adjust the deflection of the tension roller.
  • a lower corrugating roll 2 and an upper corrugating roll 3 are rotatably supported by shafts 4, 5. They have mutually parallel axes 6, 7. At their cylindrical surfaces they are provided with parallel to the axes 6, 7 extending corrugations 8, 9, which mesh with each other in the contact region 10 of the two corrugating rolls 2, 3.
  • One of the corrugating rolls 2, 3, usually the upper corrugating roll 3, is driven in the direction of rotation 11, while the other corrugating roll, usually the lower corrugating roll 2, is taken along by the other corrugating roll 3 in the direction of rotation 12.
  • a glue applicator 13 is arranged in the machine frame 1, which has a glue applicator roll 14, which is deliverable against the corrugation 9 of the upper corrugating roll 3.
  • the applicator roll 14 is rotatable about an axis 15.
  • a pressing device 16 which has a cylindrical deflecting roll 17 which is rigid in terms of bending, a tensioning roll 18 and a pressing belt 19.
  • the guide roller 17 is freely rotatably supported by bearings 20 in bearings 21 of the machine frame 1 about an axis 22, so it is not driven.
  • the tensioning roller 18 is mounted by means of bearing journals 23 about its axis 24 in bearing levers 25, which in turn are mounted pivotably in bearings 26 mounted in the machine frame 1.
  • a clamping drive 27 which is a hydraulically actuated piston-cylinder drive. This tensioning drive 27 is in turn pivotally mounted in an abutment 28 which is mounted on the machine frame 1.
  • a tensioning of the pressure belt 19 thus takes place by pivoting the tension roller 18 approximately parallel to the outlet tangent 29 in the direction 30. All axes 6, 7, 15, 22, 24 are parallel to each other. A tensioning of the pressure belt 19 takes place by pivoting the tensioning roller 18 approximately parallel to the outlet tangent 29 in the direction 30.
  • the pressure belt 19 is about a wrap angle ⁇ of about 90 ° against the corrugation 9 of the upper corrugating roll 3 and runs in the same direction with this according to the directional arrow 31.
  • the pressure belt 19 runs from the upper corrugating roller 3 in accordance with the facultytangente 29, which is identical to the inlet tangent of the Anpressbandes 19 on the tension roller 18.
  • the pressure belt 19 is formed as a fine mesh, tensile sieve, as it is for example from the DE 10 2005 035 030 A is known.
  • the tension roller 18 is hollow. It has a tubular core 32 and a likewise cylindrical outer casing 33.
  • the outer jacket 33 and the core 32 are integrally formed; they are only in the longitudinal center still on a ring land 34 interconnected.
  • an annular space 35 or 35 ' is formed, which is for example stabbed.
  • the bearing journals 23 are fastened by means of screws 36 to the end faces of the core 32.
  • the outer sheath 33 is thus only centrally connected via the annular web 34 with the core 32 and thus with the bearing pin 23.
  • the bearing journals 23 each have an adjusting ring 38 which, on its outer side, serves as an abutment, tapering outwards has widening abutment surface 39.
  • This abutment surface 39 is assigned to the associated inner side of the outer jacket 33 is also a conically widening outward contact surface 40.
  • a gap 41 is formed, which has only a very small radial width a of, for example, 0.3 to 1.0 mm.
  • an abutment for deflections of the outer jacket 33 relative to the core 32 is formed by the adjusting ring 38 as it were.
  • the adjusting ring 38 has adjusting screws 42 shown in FIGS. 4 and 5, via which it is supported against the respective flange 37 of the bearing pin 23.
  • the abutment surface 39 is displaced in the direction of the axis 24, whereby the radial width a of the gap 41 can be changed. Since the screws 36 also pass through the adjusting ring 38, the respective adjusting ring 38 is also fixedly connected in the axial direction with the core 32 and the jacket 33 and the bearing pin 23.
  • the upper corrugating roller 3 is heated in a conventional manner, for example to about 170 ° C, evaporates the contained in the tips 45 of the corrugation 44 glue 49 contained water and escapes at least partially through the laminating sheet 46 and the mesh-like pressure belt 19th
  • the finished glued, laminated on one side with a liner 46 corrugated board 50 runs in the direction of the Spartangente 29 together with the Anpressband 19 from the upper corrugating roll 3 and is performed with the Anpressband 19 partially around the tension roller 18 around. From there, it is fed in stripping direction 51 of a take-up device.
  • the pressure belt 19 is therefore applied over its full width with constant tensile stresses, so it does not - as usual in practice - loses strength in the middle with the result that the contact pressure or the contact pressure on the corrugated cardboard in the contact area 48 decreases with the Consequence that in the central region, the glueing between the laminating sheet 46 and the tips 45 of the corrugation 44 of the paper web 43 rises again. Due to the abutment formed by the respective adjusting ring 38, the deflection of the outer jacket 33 can be limited; By appropriate selection or adjustment of the adjusting ring 38, the deflection can thus be set and limited.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

The machine has lower and upper fluted rollers (2, 3) for producing corrugations (44) in a paper web (43). A glue application device (13) applies a glue (49) to tips (45) of the corrugations. A pressing device (16) presses a lined web (46) against the tips, and includes an endless pressing belt guided over a deflection roller (17) and a cylindrical tension roller (18), where the tension roller is formed from a core and an outer jacket. The core and the outer jacket are separated from each other toward outer ends of the jacket and the core by an annular space.

Description

Die Erfindung betrifft eine Maschine zur Herstellung einer mindestens einseitig kaschierten Wellpappebahn nach dem Oberbegriff des Anspruches 1 und eine Spannwalze für eine derartige Maschine nach dem Oberbegriff des Anspruches 7.The invention relates to a machine for producing a corrugated cardboard web laminated on at least one side according to the preamble of claim 1 and a tensioning roller for such a machine according to the preamble of claim 7.

Bei einer derartigen aus der EP 06 015 198.2 (entsprechend US Ser.No. 11/459 744 ) bekannten Maschine weist die Anpress-Einrichtung ein in der Regel gewebtes, siebartiges Anpressband auf. Wenn die Spannwalze in der üblichen Weise zylindrisch und in sich völlig starr ausgebildet ist, dann tritt bereits nach verhältnismäßig kurzer Betriebszeit des Bandes, jedenfalls vor dem normalen Verschleiß des Anpressbandes, eine geringe Dehnung im mittleren Bereich des Anpressbandes auf, die zu einer Reduktion des Anpressdruckes des Anpressbandes auf den mittleren Bereich der zu erzeugenden Wellpappe führt. Die Konsequenz ist, dass die Verleimung zwischen Kaschierbahn und gewellter Papierbahn möglicherweise nicht ausreichend ist, was zu entsprechenden Qualitätsmängeln der Wellpappebahn führt. Die Spannwalzen sind auch bereits ballig ausgeführt worden, worunter eine geringfügige Durchmesserabnahme von der Mitte der Walze zu ihren axialen äußeren Enden zu verstehen ist. Dies hat aber nicht zu der gewünschten Verbesserung geführt.In such from the EP 06 015 198.2 (corresponding US Ser.No. 11/459 744 ) known machine, the pressing device on a usually woven, sieve-like pressure belt. If the tension roller is cylindrical in the usual way and completely rigid in itself, then occurs after a relatively short operating time of the band, at least before the normal wear of the Anpressbandes, a low elongation in the central region of the pressure belt, resulting in a reduction of the contact pressure of the pressure belt leads to the central region of the corrugated cardboard to be produced. The consequence is that the gluing between laminating web and corrugated paper web may not be sufficient, which leads to corresponding quality defects of the corrugated web. The tension rollers have also already been performed crowned, which is to be understood by a slight decrease in diameter from the center of the roller to its axial outer ends. However, this has not led to the desired improvement.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Maschine der gattungsgemäßen Art so auszugestalten, dass die Spannung im Anpressband über dessen volle Breite während der Betriebszeit erhalten bleibt.The invention is therefore the object of a machine of the generic type in such a way that the tension in the pressure belt is maintained over its full width during the operating time.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteils des Anspruches 1 gelöst. Durch die erfindungsgemäßen Maßnahmen wird erreicht, dass der Außenmantel der Spannwalze sich zu deren äußeren Enden hin im Betrieb unter der Zugspannung des Anpressbandes radial in Richtung zur Achse geringfügig durchbiegen kann. Dies führt aber nicht zu unterschiedlichen Umfangsgeschwindigkeiten an der Oberfläche der Spannwalze über ihre volle axiale Länge, da der Umfang der Spannwalze anders als bei einer balligen Ausgestaltung über die Länge der Spannwalze unverändert bleibt, und zwar auch bei der Durchbiegung. Dies führt dazu, dass die auf das Anpressband ausgeübte Zugkraft über der Breite des Anpressbandes konstant ist, sodass auch keine stärkere Dehnung des Anpressbandes in seinem mittleren Bereich erfolgt im Vergleich zu den äußeren Seitenbereichen. Es findet also auch in der Mitte des Anpressbandes kein erhöhter Verschleiß statt. Die Qualität der Wellpappebahn ist also über die gesamte verlängerte Standzeit des Anpressbandes über die volle Breite konstant.This object is achieved by the features in the characterizing part of claim 1. The inventive measures it is achieved that the outer shell of the tension roller can bend slightly towards the outer ends in operation under the tension of the Anpressbandes radially in the direction of the axis. However, this does not lead to different peripheral velocities on the surface of the tensioning roller over its full axial length, since the circumference of the tensioning roller, unlike a crowned configuration, remains unchanged over the length of the tensioning roller, even during the deflection. As a result, the tensile force exerted on the pressure belt is constant over the width of the pressure belt, so that there is no greater expansion of the pressure belt in its middle region compared to the outer side regions. So there is no increased wear in the middle of the Anpressbandes. The quality of the corrugated web is thus constant over the entire extended service life of the pressure belt over the full width.

Die Ansprüche 2 bis 4 geben vorteilhafte Ausgestaltungen wieder. Die Ansprüche 5 und 6 geben eine Möglichkeit wieder, die Durchbiegung der Spannwalze einzustellen.The claims 2 to 4 give advantageous embodiments again. The claims 5 and 6 give a possibility again to adjust the deflection of the tension roller.

Die Ansprüche 7 bis 12 geben eine Spannwalze nach der Erfindung wieder.The claims 7 to 12 give a tension roller according to the invention again.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung. Es zeigt:

Fig. 1
eine Maschine zur Herstellung einer einseitig kaschierten Wellpappebahn in einer Seitenansicht,
Fig. 2
einen Längsschnitt durch eine Spannwalze der Maschine nach Fig. 1,
Fig. 3
einen vergrößerten Teilausschnitt aus Fig. 2,
Fig. 4
einen Längsschnitt durch eine Spannwalze der Maschine nach Fig. 1 in gegenüber Fig. 4 um die Längsachse teilweise gedrehter Darstellung und
Fig. 5
einen Teilausschnitt aus Fig. 4 in vergrößertem Maßstab.
Further features, advantages and details of the invention will become apparent from the following description of an embodiment with reference to the drawing. It shows:
Fig. 1
a machine for producing a single-faced corrugated cardboard web in a side view,
Fig. 2
a longitudinal section through a tension roller of the machine of Fig. 1,
Fig. 3
an enlarged partial section of Fig. 2,
Fig. 4
a longitudinal section through a tension roller of the machine of FIG. 1 in relation to FIG. 4 about the longitudinal axis partially rotated representation and
Fig. 5
a partial section of Fig. 4 in an enlarged scale.

In einem Maschinengestell 1 sind eine untere Riffelwalze 2 und eine obere Riffelwalze 3 mittels Wellen 4, 5 drehbar gelagert. Sie weisen zueinander parallele Achsen 6, 7 auf. An ihren Zylinderoberflächen sind sie mit sich parallel zu den Achsen 6, 7 erstreckenden Riffelungen 8, 9 versehen, die im Berührungsbereich 10 der beiden Riffelwalzen 2, 3 miteinander kämmen. Eine der Riffelwalzen 2, 3, und zwar üblicherweise die obere Riffelwalze 3, ist in Drehrichtung 11 angetrieben, während die andere Riffelwalze, üblicherweise also die untere Riffelwalze 2, in Drehrichtung 12 von der anderen Riffelwalze 3 mitgenommen wird. In Drehrichtung 11 bzw. 12, dem Berührungsbereich 10 nachgeordnet, ist eine Leimauftragseinrichtung 13 im Maschinengestell 1 angeordnet, die eine Leim-Auftragswalze 14 aufweist, die gegen die Riffelung 9 der oberen Riffelwalze 3 zustellbar ist. Die Auftragswalze 14 ist um eine Achse 15 drehbar.In a machine frame 1, a lower corrugating roll 2 and an upper corrugating roll 3 are rotatably supported by shafts 4, 5. They have mutually parallel axes 6, 7. At their cylindrical surfaces they are provided with parallel to the axes 6, 7 extending corrugations 8, 9, which mesh with each other in the contact region 10 of the two corrugating rolls 2, 3. One of the corrugating rolls 2, 3, usually the upper corrugating roll 3, is driven in the direction of rotation 11, while the other corrugating roll, usually the lower corrugating roll 2, is taken along by the other corrugating roll 3 in the direction of rotation 12. In the direction of rotation 11 and 12, downstream of the contact region 10, a glue applicator 13 is arranged in the machine frame 1, which has a glue applicator roll 14, which is deliverable against the corrugation 9 of the upper corrugating roll 3. The applicator roll 14 is rotatable about an axis 15.

Im oberen Bereich der oberen Riffelwalze 3 ist eine Anpress-Einrichtung 16 vorgesehen, die eine zylindrische, in sich biegesteife Umlenkwalze 17, eine Spannwalze 18 und ein Anpressband 19 aufweist. Die Umlenkwalze 17 ist mittels Lagerzapfen 20 in Lagern 21 des Maschinengestells 1 um eine Achse 22 frei drehbar gelagert, ist also nicht angetrieben. Die Spannwalze 18 ist mittels Lagerzapfen 23 um ihre Achse 24 in Lagerhebeln 25 gelagert, die wiederum in im Maschinengestell 1 angebrachten Lagern 26 schwenkbar gelagert sind. An den Lagerhebeln 25 greift im Bereich der Lagerzapfen 23 ein Spann-Antrieb 27 an, bei dem es sich um einen hydraulisch beaufschlagbaren Kolben-Zylinder-Antrieb handelt. Dieser Spann-Antrieb 27ist wiederum in einem Widerlager 28 schwenkbar gelagert, das am Maschinengestell 1 angebracht ist. Ein Spannen des Anpressbandes 19 erfolgt also durch verschwenken der Spannwalze 18 etwa parallel zur Ablauftangente 29 in Richtung 30. Alle Achsen 6, 7, 15, 22, 24 verlaufen parallel zueinander. Ein Spannen des Anpressbandes 19 erfolgt durch Verschwenkung der Spannwalze 18 etwa parallel zur Ablauftangente 29 in Richtung 30.In the upper region of the upper corrugating roll 3, a pressing device 16 is provided, which has a cylindrical deflecting roll 17 which is rigid in terms of bending, a tensioning roll 18 and a pressing belt 19. The guide roller 17 is freely rotatably supported by bearings 20 in bearings 21 of the machine frame 1 about an axis 22, so it is not driven. The tensioning roller 18 is mounted by means of bearing journals 23 about its axis 24 in bearing levers 25, which in turn are mounted pivotably in bearings 26 mounted in the machine frame 1. At the bearing levers 25 engages in the region of the bearing pin 23, a clamping drive 27, which is a hydraulically actuated piston-cylinder drive. This tensioning drive 27 is in turn pivotally mounted in an abutment 28 which is mounted on the machine frame 1. A tensioning of the pressure belt 19 thus takes place by pivoting the tension roller 18 approximately parallel to the outlet tangent 29 in the direction 30. All axes 6, 7, 15, 22, 24 are parallel to each other. A tensioning of the pressure belt 19 takes place by pivoting the tensioning roller 18 approximately parallel to the outlet tangent 29 in the direction 30.

Wie Fig. 1 entnehmbar ist, liegt das Anpressband 19 über einen Umschlingungswinkel α von etwa 90° gegen die Riffelung 9 der oberen Riffelwalze 3 an und läuft drehrichtungsgleich mit dieser entsprechend dem Richtungspfeil 31 um. Das Anpressband 19 läuft von der oberen Riffelwalze 3 entsprechend der Ablauftangente 29 ab, die identisch mit der Einlauftangente des Anpressbandes 19 auf die Spannwalze 18 ist.As shown in FIG. 1 can be removed, the pressure belt 19 is about a wrap angle α of about 90 ° against the corrugation 9 of the upper corrugating roll 3 and runs in the same direction with this according to the directional arrow 31. The pressure belt 19 runs from the upper corrugating roller 3 in accordance with the Ablauftangente 29, which is identical to the inlet tangent of the Anpressbandes 19 on the tension roller 18.

Das Anpressband 19 ist als feinmaschiges, zugfestes Sieb-Band ausgebildet, wie es beispielsweise aus der DE 10 2005 035 030 A bekannt ist.The pressure belt 19 is formed as a fine mesh, tensile sieve, as it is for example from the DE 10 2005 035 030 A is known.

Wie sich aus Fig. 2 bis 5 ergibt, ist die Spannwalze 18 hohl ausgebildet. Sie weist einen rohrförmigen Kern 32 und einen ebenfalls zylindrischen Außenmantel 33 auf. Der Außenmantel 33 und der Kern 32 sind einstückig ausgebildet; sie sind lediglich in der Längsmitte noch über einen Ringsteg 34 miteinander verbunden. Beiderseits dieses Ringstegs 34 ist ein Ringraum 35 bzw. 35' ausgebildet, der beispielsweise eingestochen ist. Die Lagerzapfen 23 sind mittels Schrauben 36 an den Stirnseiten des Kerns 32 befestigt. Der Außenmantel 33 ist also nur über den Ringsteg 34 mittig mit dem Kern 32 und damit mit den Lagerzapfen 23 verbunden.As is apparent from Fig. 2 to 5, the tension roller 18 is hollow. It has a tubular core 32 and a likewise cylindrical outer casing 33. The outer jacket 33 and the core 32 are integrally formed; they are only in the longitudinal center still on a ring land 34 interconnected. On both sides of this annular web 34, an annular space 35 or 35 'is formed, which is for example stabbed. The bearing journals 23 are fastened by means of screws 36 to the end faces of the core 32. The outer sheath 33 is thus only centrally connected via the annular web 34 with the core 32 and thus with the bearing pin 23.

Wie weiterhin aus Fig. 2 bis 5 entnehmbar ist, ist im axialen Außenbereich, also an den axial außen liegenden Seiten der Flansche 37 der Lagerzapfen 23 jeweils ein Einstell-Ring 38 angeordnet, der an seiner Außenseite eine als Widerlager dienende, sich konisch nach außen erweiternde Widerlager-Fläche 39 aufweist. Dieser Widerlager-Fläche 39 ist an der zugeordneten Innenseite des Außen-Mantels 33 eine sich ebenfalls konisch nach außen erweiternde Anlage-Fläche 40 zugeordnet. Zwischen der Widerlager-Fläche 39 und der Anlage-Fläche 40 ist ein Spalt 41 ausgebildet, der eine nur sehr geringe radiale Weite a von beispielsweise 0,3 bis 1,0 mm aufweist. Hierdurch wird durch den Einstell-Ring 38 gleichsam ein Widerlager für Durchbiegungen des Außenmantels 33 gegenüber dem Kern 32 gebildet. Wenn die Durchbiegung in den axialen Außenbereichen die Weite des Spalts 41 erreicht, liegt der Außenmantel 33 gegen den Einstell-Ring 38 an, wodurch die Durchbiegung begrenzt wird. Der Einstell-Ring 38 weist in den Fig. 4 und 5 dargestellte Einstell-Schrauben 42 auf, über die er sich gegen den jeweiligen Flansch 37 des Lagerzapfens 23 abstützt. Durch entsprechende Einstellung eines Abstandes zwischen dem Einstell-Ring 38 und dem Flansch 37 wird die Widerlager-Fläche 39 in Richtung der Achse 24 verschoben, wodurch die radiale Weite a des Spaltes 41 verändert werden kann. Da die Schrauben 36 auch den Einstell-Ring 38 durchsetzen, wird der jeweilige Einstell-Ring 38 ebenfalls in axialer Richtung fest mit dem Kern 32 und dem Mantel 33 und den Lagerzapfen 23 verbunden.As can further be seen from FIGS. 2 to 5, in the axial outer region, that is to say on the axially outer sides of the flanges 37, the bearing journals 23 each have an adjusting ring 38 which, on its outer side, serves as an abutment, tapering outwards has widening abutment surface 39. This abutment surface 39 is assigned to the associated inner side of the outer jacket 33 is also a conically widening outward contact surface 40. Between the abutment surface 39 and the abutment surface 40, a gap 41 is formed, which has only a very small radial width a of, for example, 0.3 to 1.0 mm. As a result, an abutment for deflections of the outer jacket 33 relative to the core 32 is formed by the adjusting ring 38 as it were. When the deflection in the axial outer regions reaches the width of the gap 41, the outer jacket 33 abuts against the adjusting ring 38, whereby the deflection is limited. The adjusting ring 38 has adjusting screws 42 shown in FIGS. 4 and 5, via which it is supported against the respective flange 37 of the bearing pin 23. By appropriate adjustment of a distance between the adjusting ring 38 and the flange 37, the abutment surface 39 is displaced in the direction of the axis 24, whereby the radial width a of the gap 41 can be changed. Since the screws 36 also pass through the adjusting ring 38, the respective adjusting ring 38 is also fixedly connected in the axial direction with the core 32 and the jacket 33 and the bearing pin 23.

Die Wirkungsweise der Maschine ist wie folgt:

  • In den Berührungsbereich 10 zwischen der unteren und der oberen Riffelwalze 2, 3 läuft eine Papierbahn 43 ein, die durch die Riffelungen 8, 9 mit einer Wellung 44 versehen wird. Die Spitzen 45 der jeweiligen Wellung 44 werden in der Leimauftragseinrichtung 13 mit Leim versehen. Die übrigen Bereiche der gewellten Papierbahn 43 werden nicht beleimt. Über die Umlenkwalze 17 wird eine Kaschierbahn 46 zugeführt, die ebenfalls aus Papier besteht und die gleiche Breite hat wie die Papierbahn 43. Diese Kaschierbahn 46 wird gegen die Außenseite 47 des Anpressbandes 19 eingeführt und in den durch den Umschlingungswinkel α definierten Anpressbereich 48 des Anpressbandes 19 gegen die Spitzen 45 der in der Riffelung 9 der oberen Riffelwalze 3 liegenden, gewellten Papierbahn 43 gedrückt und mit dieser verbunden. Das Anpressband 19 presst hierbei mit seiner Außenseite 47 die Kaschierbahn 46 gegen die gewellte Papierbahn 43.
The operation of the machine is as follows:
  • In the contact region 10 between the lower and the upper corrugating roll 2, 3, a paper web 43 enters, which is provided by the corrugations 8, 9 with a corrugation 44. The tips 45 of the respective corrugation 44 are provided in the glue applicator 13 with glue. The remaining areas of the corrugated paper web 43 are not glued. About the guide roller 17 a laminating 46 is supplied, which also consists of paper and has the same width as the paper web 43. This liner 46 is inserted against the outside 47 of the Anpressbandes 19 and in the defined by the wrap angle α Anpressbereich 48 of the Anpressbandes 19th pressed against the tips 45 of the corrugation 9 of the upper corrugating roll 3 lying, corrugated paper web 43 and connected thereto. The pressing belt 19 in this case presses with its outer side 47 the laminating strip 46 against the corrugated paper web 43.

Da die obere Riffelwalze 3 in üblicher Weise, beispielsweise auf ca. 170°C, geheizt wird, verdampft das im an den Spitzen 45 der Wellung 44 befindlichen Leim 49 enthaltene Wasser und entweicht mindestens zum Teil durch die Kaschierbahn 46 und das siebartige Anpressband 19.Since the upper corrugating roller 3 is heated in a conventional manner, for example to about 170 ° C, evaporates the contained in the tips 45 of the corrugation 44 glue 49 contained water and escapes at least partially through the laminating sheet 46 and the mesh-like pressure belt 19th

Die fertig verleimte, einseitig mit einer Kaschierbahn 46 kaschierte Wellpappebahn 50 läuft in Richtung der Ablauftangente 29 zusammen mit dem Anpressband 19 von der oberen Riffelwalze 3 ab und wird mit dem Anpressband 19 teilweise um die Spannwalze 18 herum geführt. Von dort wird sie in Abziehrichtung 51 einer Aufwickeleinrichtung zugeführt.The finished glued, laminated on one side with a liner 46 corrugated board 50 runs in the direction of the Ablauftangente 29 together with the Anpressband 19 from the upper corrugating roll 3 and is performed with the Anpressband 19 partially around the tension roller 18 around. From there, it is fed in stripping direction 51 of a take-up device.

Durch die Ausgestaltung der Spannwalze 18 wird erreicht, dass diese während des Betriebs aufgrund der großen Spannungen im Anpressband 19 jeweils im Auflagebereich 52 des Anpressbandes 19 an der Spannwalze 18 der Außenmantel 33 zur Achse 24 hin durchgebogen wird. Im Unterschied zu einer balligen Walze ist aber der Umfang des Außen-Mantels 33 über seine volle Länge konstant, da er von Haus aus zylindrisch ist. Dies hat wiederum auch zur Folge, dass über die volle axiale Länge - im Unterschied zu einer balligen Walze - identische Umfangsgeschwindigkeiten herrschen. Das Anpressband 19 wird daher über seine volle Breite mit gleichbleibenden Zugspannungen beaufschlagt, sodass es nicht - wie sonst in der Praxis - in der Mitte an Festigkeit verliert mit der Folge, dass die Anpresskraft bzw. der Anpressdruck auf die Wellpappe im Anpressbereich 48 nachlässt mit der Folge, dass im mittleren Bereich die Verleimung zwischen der Kaschierbahn 46 und den Spitzen 45 der Wellung 44 der Papierbahn 43 wieder aufgeht. Durch die durch den jeweiligen Einstell-Ring 38 gebildeten Widerlager kann die Durchbiegung des Außenmantels 33 begrenzt werden; durch die geeignete Auswahl oder Einstellung des Einstell-Rings 38 kann die Durchbiegung also eingestellt und begrenzt werden.Due to the design of the tension roller 18 is achieved that this during operation due to the high voltages in the pressure belt 19th each in support area 52 of the pressure belt 19 on the tension roller 18 of the outer shell 33 is bent toward the axis 24 out. However, unlike a crowned roll, the circumference of the outer shell 33 is constant over its full length because it is inherently cylindrical. This in turn also has the consequence that over the full axial length - in contrast to a crowned roller - identical peripheral speeds prevail. The pressure belt 19 is therefore applied over its full width with constant tensile stresses, so it does not - as usual in practice - loses strength in the middle with the result that the contact pressure or the contact pressure on the corrugated cardboard in the contact area 48 decreases with the Consequence that in the central region, the glueing between the laminating sheet 46 and the tips 45 of the corrugation 44 of the paper web 43 rises again. Due to the abutment formed by the respective adjusting ring 38, the deflection of the outer jacket 33 can be limited; By appropriate selection or adjustment of the adjusting ring 38, the deflection can thus be set and limited.

Claims (12)

Maschine zur Herstellung einer mindestens einseitig kaschierten Wellpappebahn (50),
mit zwei Riffelwalzen (2, 3) zur Erzeugung einer Wellung (44) an einer Papierbahn (43),
mit einer Leimauftragseinrichtung (13) zum Auftrag vom Leim (49) auf die Spitzen (45) der Wellung (44) der gewellten Papierbahn (43), mit einer Anpress-Einrichtung (16) zum Anpressen einer Kaschierbahn (46) an die mit Leim (49) versehenen Spitzen (45) der an einer der Riffelwalzen (3) über einen Anpressbereich (48) anliegenden gewellten Papierbahn (43),
wobei die Anpress-Einrichtung (16) ein endloses Anpressband (19) aufweist, das über eine Umlenkwalze (17) und eine zylindrische Spannwalze (18) geführt ist, und das über den Anpressbereich (48) gegen die Riffelwalze (3) gedrückt ist,
dadurch gekennzeichnet,
dass die Spannwalze (18) aus einem Kern (32) und einem diesen umgebenden Außenmantel (33) gebildet ist, wobei der Kern (32) und der Außenmantel (33) nur im Bereich ihrer Längsmitte miteinander verbunden und zu ihren äußeren Enden hin jeweils durch einen Ringraum (35, 35') voneinander getrennt sind.Machine for producing a corrugated cardboard web (50) laminated on at least one side,
with two corrugating rolls (2, 3) for producing a corrugation (44) on a paper web (43),
with a glue applicator (13) for applying the glue (49) to the tips (45) of the corrugation (44) of the corrugated paper web (43), with a pressing device (16) for pressing a laminating web (46) to the with glue (49) provided with tips (45) on one of the corrugating rollers (3) via a contact pressure (48) abutting corrugated paper web (43),
wherein the pressing device (16) comprises an endless pressure belt (19) which is guided over a deflecting roller (17) and a cylindrical tensioning roller (18) and which is pressed against the corrugating roller (3) via the contact pressure region (48),
characterized,
in that the tensioning roller (18) is formed from a core (32) and an outer casing (33) surrounding it, wherein the core (32) and the outer casing (33) are interconnected only in the region of their longitudinal center and in each case towards their outer ends an annular space (35, 35 ') are separated from each other. Maschine nach Anspruch 1, dadurch gekennzeichnet, dass der Kern (32) und der Außenmantel (33) durch einen Ringsteg (34) miteinander verbunden sind.Machine according to claim 1, characterized in that the core (32) and the outer casing (33) are connected to each other by an annular web (34). Maschine nach Anspruch 2, dadurch gekennzeichnet, dass der Kern (32), der Außenmantel (33) und der Ringsteg (34) einstückig miteinander ausgebildet sind.Machine according to claim 2, characterized in that that the core (32), the outer jacket (33) and the annular web (34) are integrally formed with each other. Maschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet,
dass die Ringräume (35, 35') ringzylindrisch ausgebildet sind.Machine according to one of claims 1 to 3, characterized
that the annular spaces (35, 35 ') are formed annular cylindrical. Maschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet,
dass im Bereich der axialen Enden der Spannwalze (18) im jeweiligen Ringraum (35, 35') ein Widerlager (38) angeordnet ist, das einen Spalt (41) zum Außenmantel (33) begrenzt, für dessen Weite (a) gilt 0,3 mm ≤a ≤1,0 mm.Machine according to one of claims 1 to 4, characterized
that in the region of the axial ends of the tension roller (18) in the respective annular space (35, 35 ') of an abutment (38) is arranged which defines a gap (41) to the outer casing (33) for its width (a) is, 0, 3 mm ≤a ≤1.0 mm. Maschine nach Anspruch 5, dadurch gekennzeichnet, dass die Weite (a) des Spalts (41) einstellbar ist.Machine according to claim 5, characterized in that the width (a) of the gap (41) is adjustable. Spannwalze für eine Anpress-Einrichtung (16) an einer Maschine zur Herstellung einer mindestens einseitig kaschierten Wellpappebahn (56) mit zwei Riffelwalzen (2, 3) zur Erzeugung einer Wellung (44) an einer Papierbahn (43),
mit einer Leimauftragseinrichtung (13) zum Auftrag vom Leim (49) auf die Spitzen (45) der Wellung (44) der gewellten Papierbahn (43), mit einer Anpress-Einrichtung (16) zum Anpressen einer Kaschierbahn (46) an die mit Leim (49) versehenen Spitzen (45) der an einer der Riffelwalzen (3) über einen Anpressbereich (48) anliegenden gewellten Papierbahn (43),
wobei die Anpress-Einrichtung (16) ein endloses Anpressband (19) aufweist, das über eine Umlenkwalze (17) und die zylindrische Spannwalze (18) geführt ist, und das über den Anpressbereich (48) gegen die Riffelwalze (3) gedrückt ist, dadurch gekennzeichnet,
dass die Spannwalze (18) aus einem Kern (32) und einem diesen umgebenden Außenmantel (33) gebildet ist, wobei der Kern (32) und der Außenmantel (33) nur im Bereich ihrer Längsmitte miteinander verbunden und zu ihren äußeren Enden hin jeweils durch einen Ringraum (35, 35') voneinander getrennt sind.Tensioning roll for a pressing device (16) on a machine for producing a corrugated cardboard web (56) laminated on at least one side with two corrugating rolls (2, 3) for producing a corrugation (44) on a paper web (43),
with a glue applicator (13) for applying the glue (49) to the tips (45) of the corrugation (44) of the corrugated paper web (43), with a pressing device (16) for pressing a laminating web (46) to the with glue (49) provided with tips (45) on one of the corrugating rollers (3) via a contact pressure (48) abutting corrugated paper web (43),
wherein the pressing device (16) comprises an endless pressure belt (19), which via a deflection roller (17) and the cylindrical Tensioning roller (18) is guided, and which is pressed over the contact pressure area (48) against the corrugating roller (3), characterized
in that the tensioning roller (18) is formed from a core (32) and an outer casing (33) surrounding it, wherein the core (32) and the outer casing (33) are interconnected only in the region of their longitudinal center and in each case towards their outer ends an annular space (35, 35 ') are separated from each other. Spannwalze nach Anspruch 7, dadurch gekennzeichnet,
dass der Kern (32) und der Außenmantel (33) durch einen Ringsteg (34) miteinander verbunden sind.Tensioning roller according to claim 7, characterized
in that the core (32) and the outer jacket (33) are connected to one another by an annular web (34). Spannwalze nach Anspruch 8, dadurch gekennzeichnet,
dass der Kern (32), der Außenmantel (33) und der Ringsteg (34) einstückig miteinander ausgebildet sind.Tensioning roller according to claim 8, characterized in that
that the core (32), the outer jacket (33) and the annular web (34) are integrally formed with each other. Spannwalze nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet,
dass die Ringräume (35, 35') ringzylindrisch ausgebildet sind.Tensioning roller according to one of claims 7 to 9, characterized
that the annular spaces (35, 35 ') are formed annular cylindrical. Spannwalze nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet,
dass im Bereich der axialen Enden der Spannwalze (18) im jeweiligen Ringraum (35, 35') ein Widerlager (38) angeordnet ist, das einen Spalt (41) zum Außenmantel (33) begrenzt, für dessen Weite (a) gilt 0,3 mm ≤a ≤1,0 mm.Tensioning roller according to one of claims 7 to 10, characterized
that in the region of the axial ends of the tension roller (18) in the respective annular space (35, 35 ') of an abutment (38) is arranged which defines a gap (41) to the outer casing (33) for its width (a) is, 0, 3 mm ≤a ≤1.0 mm. Spannwalze nach Anspruch 11, dadurch gekennzeichnet, dass die Weite (a) des Spalts (41) einstellbar ist.Tensioning roller according to claim 11, characterized in that the width (a) of the gap (41) is adjustable.
EP07013635A 2006-09-29 2007-07-12 Tension roller for machine for manufacturing a corrugated cardboard sheet clad on at least one side and such a machine Active EP1905893B1 (en)

Applications Claiming Priority (1)

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DE102006046500A DE102006046500A1 (en) 2006-09-29 2006-09-29 Machine for producing a corrugated cardboard web laminated on at least one side and tensioning roll for such a machine

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EP1905893B1 EP1905893B1 (en) 2010-05-12

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Also Published As

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JP4848336B2 (en) 2011-12-28
US20080073033A1 (en) 2008-03-27
US8127816B2 (en) 2012-03-06
DE102006046500A1 (en) 2008-04-03
EP1905893B1 (en) 2010-05-12
DE502007003712D1 (en) 2010-06-24
JP2008087480A (en) 2008-04-17

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