EP1878828B1 - Roller and method for its manufacture - Google Patents

Roller and method for its manufacture Download PDF

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Publication number
EP1878828B1
EP1878828B1 EP07105069A EP07105069A EP1878828B1 EP 1878828 B1 EP1878828 B1 EP 1878828B1 EP 07105069 A EP07105069 A EP 07105069A EP 07105069 A EP07105069 A EP 07105069A EP 1878828 B1 EP1878828 B1 EP 1878828B1
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EP
European Patent Office
Prior art keywords
strip
roll
roll core
core
winding
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EP07105069A
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German (de)
French (fr)
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EP1878828A1 (en
Inventor
Harald Aufrecht
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP1878828A1 publication Critical patent/EP1878828A1/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0246—Hard rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/08—Pressure rolls
    • D21F3/086—Pressure rolls having a grooved surface

Definitions

  • the invention relates to a method for producing a roll for a machine for producing and / or finishing a paper, board, tissue or another fibrous web, in which a profiled strip is wound spirally around a shell-shaped roll core.
  • the invention also relates to a roll, in particular produced by this process, for a machine for producing and / or finishing a paper, board, tissue or other fibrous web, with a jacket-shaped roll core and a profiled strip wound spirally around the roll core.
  • a method, a device and a roller of the type mentioned are known from DE 25 45 146 A1 known.
  • the profiled strip here serves to inexpensively create a grooved surface in a roll for a paper machine.
  • the strip used there has an incision on an outer edge, which results in a helically extending groove in the lining.
  • the band has a projection on one vertical side and a corresponding groove on the other vertical side. Neighboring turns of the band thus interlock.
  • a grooved roller in which first threads are used in a roll core for producing a reference, in which subsequently a band is pressed, which provides the lateral surface of the roller.
  • the roll cover can detach under load from the roll core. Relative displacements between the tape windings can also damage the roll cover.
  • the object of the invention is therefore to improve the stability and thus also the durability of the wound roll covers.
  • the object is achieved in that when winding the tape whose residual stress is set or controlled so high that the elastic limit of the mantle surface of the roll core is exceeded.
  • Clamping is to be understood here as meaning that the preferably profiled strip is prestressed by the application of tensile force by deceleration of the strip and thus an internal pretensioning force is built up.
  • the tape By exceeding the elastic limit, the tape will partially embed in the roll core, resulting in a fixation of the tape turns.
  • the jacket surface plastically deforms to a permanent groove, which receives part of the strip and thus stabilizes.
  • the tensile stress can reach up to the yield point of the band.
  • the residual stress of the belt should be set to values of more than 600 MPa.
  • the residual stress of the belt can be adjusted in particular by appropriate acceleration or deceleration of the belt during winding.
  • the residual stress of the band increases by deceleration, while it is reduced by accelerating.
  • the acceleration or deceleration of the tape is preferably effected by additionally acting on the tape driving and braking means.
  • two opposing driven acceleration / deceleration sections are used to accelerate or decelerate the strip.
  • the tape is passed between them.
  • two such pairs of rollers are provided.
  • the acceleration or deceleration of the belt can advantageously be carried out by accelerating or decelerating at least one pair of rollers, through which the belt is passed under friction.
  • the acceleration or deceleration of the strip takes place by accelerating or decelerating the roll, from which the strip is pulled off.
  • this winding is preferably accelerated or decelerated accordingly by means of a controlled motor in order to apply a particularly constant, constant tension to the belt.
  • a special way of adjusting or regulating the residual stress is therefore to design in addition to the drive of the roller core and the winding drivable and / or braked, from which the profile strip is unwound. For example, by appropriate settings of the speeds or torques of the roller core on the one hand and the coil on the other hand, the desired residual stress of the profile strip can be adjusted.
  • Another possibility is to provide at least one pair of rollers, before the belt runs onto the roller core, through which the preferably profiled belt passes under friction.
  • the residual stress of the profile strip can be adjusted in the desired manner.
  • the residual stress of the strip is measured during winding and the value determined is used for regulating the residual stress. This ensures that the desired residual stress in the finished roll is achieved with high accuracy.
  • the belt tension measuring devices can be used, which measure the tensile forces in the band during the winding process.
  • the tape is pressed during winding at least one point radially on the roller core. In this case, for example, proceed as described in the DE 25 45 146 A1 is described.
  • steel especially stainless steel
  • This is itself already largely corrosion resistant and satisfies the other requirements for a roll cover of the type mentioned in an advantageous manner.
  • the residual stress of the strip should be set to values of over 600 MPa in the interest of optimum embedding of the strip in the roll core.
  • the tape is provided with a corrosion-inhibiting and / or friction-enhancing layer before being wound up.
  • the strip is preferably guided during the winding process prior to emergence onto the roll core through a device section which provides the strip with the layer.
  • the strip By providing the strip with a corresponding layer prior to winding, corrosion between the roll core and the roll cover can be prevented or at least reduced.
  • a layer can increase the coefficient of friction of the surface of the belt, whereby at least movements between the individual belt windings and movements of these belt windings relative to the roller core during operation are at least reduced. Both leads advantageously to a significant increase in the durability of the roller.
  • the band is advantageously provided with such a layer that again sets a relation to an uncoated smooth strip surface by a factor of 3 to 4 increased coefficient of friction.
  • a chromium-nickel alloy As a coating, in particular a chromium-nickel alloy has been found to be advantageous. Good results are also achieved with a tungsten layer, a tungsten carbide layer, a zinc layer, a tin layer, a lacquer layer or a layer of a protective color, such as Mennige. In principle, other suitable materials or a dip bath of sealant or thermosetting plastic can be used.
  • the strip is partially embedded in the roll core.
  • the embedding of the band stabilizes its position and thus effectively prevents lifting of the band from the roll core or relative displacements of the Tape winding. As a result, the durability of the roller improves considerably even under heavy loads.
  • the production machine shown comprises a stand 7 for rotatably supporting a steel profile roll 2. From the tape roll 2, a steel profile strip 1 is guided to a roll core 3, which is also rotatably mounted on a stand 8 and made of steel.
  • the steel profile strip 1 is attached circumferentially at one end of the roll core 3, for example, welded.
  • the roller core 3 By turning the roller core 3 about its longitudinal axis 9 and axially moving the belt 1 away from the end, the steel profile belt 1 is pulled off the reel 2 and spirally wound onto the roller core 3.
  • the steel profile strip 1 is radially pressed by a plurality of distributed over the circumference of the roll core arranged pressing rollers 10 on the roll core 3 to the individual turns of the steel profile strip 1 firmly together to apply.
  • the pressure rollers 10 are mounted in a holder which is displaceable by means not shown here in the axial direction of the roller core 3.
  • the profiled strip 1 is profiled so that it has a projection 11 on its one vertical side and a corresponding groove 12 on its other vertical side. Successive turns of the profile strip 1 thereby engage positively in one another.
  • the profile band 1 is provided on its outer edge 13 with a recess 14 which forms a helical groove in the finished roll cover.
  • a device 6 for applying a surface structure on the profile strip 1 and a device not shown here for coating the profile strip 1 with a corrosion-inhibiting and / or friction-increasing layer is arranged.
  • the profile band 1 for example, with a by example. Sanding or blasting, such as. Sandblasting, roughened surface to form the surface structure can be provided.
  • a knurling wheel 16 with the aid of which a surface structure is knurled and / or ruffled on the surface of the profile strip 1.
  • the coating device can be, for example, a spray device with which the profile strip 1 can be sprayed with suitable material, for example a chromium-nickel alloy, tungsten carbide, zinc, tin, lacquer or a protective color such as red lead.
  • suitable material for example a chromium-nickel alloy, tungsten carbide, zinc, tin, lacquer or a protective color such as red lead.
  • an immersion bath in particular a galvanic bath, a bath of a sealing compound or of curable plastic, through which the profiled strip 1 is passed onto the roll core 3 before being wound up.
  • means for applying a layer forming the surface structure to the structural band 1 or next to the means for coating of the structural band 1 additionally be provided for introducing a surface structure into the layer obtained.
  • the relevant device 6 for applying the surface structure may in particular also comprise means for applying a film layer forming the surface structure to the structural band 1.
  • the preferably made of stainless steel profile strip 1 on the two sides, where the axially successive spiral band turns touch, and / or provided on its side touching the roller core 3 with a surface structure become.
  • the profiled strip 1 is provided during the winding process before emergence onto the roll core 3 with the surface structure.
  • the device in question may in particular comprise a device section through which the profiled strip 1 is guided and which provides the profiled strip 1 with the surface structure.
  • the surface structure applied by means of the device in question may, in particular, be selected such that an increase in the coefficient of friction by a factor of 3 to 4 results compared to a non-structured smooth strip surface.
  • the coefficient of friction compared to an uncoated smooth strip surface can be increased, for example, by a factor of 3 to 4.
  • an increase in the coefficient of friction ⁇ from a value in the range of 0.16 to 0.19 to a value of about 0.53 to about 0.7 can be achieved with the sheath of the profiled strip 1.
  • the surface roughness is increased from a value of, for example, about 0.4 ⁇ m to a value of, for example, about 0.8 ⁇ m.
  • the steel profile wrap 2 can also be accelerated or decelerated about its axis of rotation.
  • a residual stress can be set by the winding 2 is accelerated or decelerated when removing the profile strip 1 from the winding 2 by the rotating roller core 3.
  • the internal stress at the two ends of the roll core 3 can be set higher or lower than in the middle of the roll core 3.
  • the residual stress is preferably set so that in the finished roll as possible no relative movement between the roll core 3 and wound profile strip 1 results.
  • measuring rollers 15 are provided which directly or indirectly measure the residual stress of the profiled strip and transfer the measured values to a control device (not shown).
  • a drive and braking device 4 between the steel profile coil 2 and the roller core 3 is arranged.
  • the drive and braking device 4 comprises two pairs of rollers 5, between which the profile band 1 is passed under friction.
  • the residual stress of the belt 1 is set to values of more than 600 MPa. Such a high tension exceeds the elastic limit of the roller core 3 on the mantle surface, so that the tape 1 penetrates into the mantle surface and causes a plastic deformation there. This leads to the formation of grooves in the mantle surface which surround part of the profile strip 1 and so on stabilize the position of the tape turns by the positive connection between the belt 1 and the roll core 3.
  • the radial pressing of the band 1 on the pressure rollers 10 can support the penetration of the profile strip 1 in the roll core 3 to a considerable extent.
  • a straightening device 17 which is to align the profile band 1 while passing straight.
  • the roller according to the invention also results in a reduced risk of corrosion and reduced relative movement between the individual turns of the profile strip 1 and between the profile band 1 and the roller core 3.
  • the durability of the roller according to the invention is increased over known rollers.

Landscapes

  • Paper (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Making Paper Articles (AREA)
  • Winding Of Webs (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

Method for manufacturing rollers for use in machines for producing or processing paper or cardboard comprises winding a profiled strip (1) in a spiral on hollow roller core (3). The tension of the strip during winding is kept at a value which exceeds the elastic limit of the surface of the core. An independent claim is included for rollers produced using the method, in which the strip is partially embedded in the core.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer Walze für eine Machine zur Herstellung und/oder Veredlung einer Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn, bei dem ein profiliertes Band spiralförmig um einen mantelförmigen Walzenkern gewickelt wird.The invention relates to a method for producing a roll for a machine for producing and / or finishing a paper, board, tissue or another fibrous web, in which a profiled strip is wound spirally around a shell-shaped roll core.

Die Erfindung betrifft auch eine, insbesondere nach diesem Verfahren hergestellte Walze für eine Machine zur Herstellung und/oder Veredlung einer Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn, mit einem mantelförmigen Walzenkern und einem spiralförmig um den Walzenkern gewickelten, profilierten Band.The invention also relates to a roll, in particular produced by this process, for a machine for producing and / or finishing a paper, board, tissue or other fibrous web, with a jacket-shaped roll core and a profiled strip wound spirally around the roll core.

Ein Verfahren, eine Vorrichtung sowie eine Walze der genannten Art sind aus der DE 25 45 146 A1 bekannt. Das profilierte Band dient hier dazu, auf kostengünstige Weise eine gerillte Oberfläche bei einer Walze für eine Papiermaschine zu schaffen. Hierfür weist das dort verwendete Band an einer außen liegenden Kante einen Einschnitt auf, wodurch sich im Belag eine schraubenförmig verlaufende Rille ergibt. Zudem weist das Band an einer Vertikalseite einen Vorsprung und an der anderen Vertikalseite eine entsprechende Nut auf. Benachbarte Windungen des Bandes greifen dadurch ineinander.A method, a device and a roller of the type mentioned are known from DE 25 45 146 A1 known. The profiled strip here serves to inexpensively create a grooved surface in a roll for a paper machine. For this purpose, the strip used there has an incision on an outer edge, which results in a helically extending groove in the lining. In addition, the band has a projection on one vertical side and a corresponding groove on the other vertical side. Neighboring turns of the band thus interlock.

Aus der DE 29 13 362 ist ferner eine Rillenwalze bekannt, bei der zur Herstellung eines Bezugs zuerst in einem Walzenkern Gewinderillen eingesetzt werden, in welche nachfolgend ein Band eingepresst wird, welches die Mantelfläche der Walze bereitstellt.From the DE 29 13 362 Furthermore, a grooved roller is known, in which first threads are used in a roll core for producing a reference, in which subsequently a band is pressed, which provides the lateral surface of the roller.

Bei derartigen Walzen mit gewickeltem Walzenbezug kann sich der Walzenbezug unter Belastung vom Walzenkern ablösen. Auch Relativverschiebungen zwischen den Bandwicklungen können zu Beschädigungen des Walzenbezugs führen.In such rolls with wound roll cover, the roll cover can detach under load from the roll core. Relative displacements between the tape windings can also damage the roll cover.

Die Aufgabe der Erfindung ist es daher die Stabilität und damit auch die Haltbarkeit der gewickelten Walzenbezüge zu verbessern.The object of the invention is therefore to improve the stability and thus also the durability of the wound roll covers.

Erfindungsgemäß, wurde die Aufgabe dadurch gelöst, dass beim Aufwickeln des Bandes dessen Eigenspannung so hoch eingestellt oder geregelt wird, dass die Elastizitätsgrenze der Manteloberfläche des Walzenkerns überschritten wird.According to the invention, the object is achieved in that when winding the tape whose residual stress is set or controlled so high that the elastic limit of the mantle surface of the roll core is exceeded.

Unter Einspannung sei hier zu verstehen, dass das vorzugsweise profilierte Band durch das Aufbringen von Zugkraft durch Verzögern des Bandes vorgespannt wird und so eine innere Vorspannkraft aufgebaut wird.Clamping is to be understood here as meaning that the preferably profiled strip is prestressed by the application of tensile force by deceleration of the strip and thus an internal pretensioning force is built up.

Durch die Wahl einer entsprechend hohen Eigenspannung des Bandes kann insbesondere auch eine Bewegung der Bandwindungen relativ zueinander sowie eine Bewegung der Windungen relativ zum Walzenkern gehemmt werden.By choosing a correspondingly high residual stress of the belt, in particular a movement of the belt windings relative to one another as well as a movement of the windings relative to the roll core can be inhibited.

Durch das Überschreiten der Elastizitätsgrenze wird sich das Band teilweise in den Walzenkern einbetten, was zu einer Fixierung der Bandwindungen führt.By exceeding the elastic limit, the tape will partially embed in the roll core, resulting in a fixation of the tape turns.

Da an der Berührungsfläche zwischen Band und Walzenkern die Elastizitätsgrenze des Walzenkerns überschritten ist, verformt sich die Manteloberfläche plastisch zu einer bleibenden Rille, welche einen Teil des Bandes aufnimmt und so stabilisiert.Since the elastic limit of the roll core is exceeded at the contact surface between the strip and the roll core, the jacket surface plastically deforms to a permanent groove, which receives part of the strip and thus stabilizes.

Dies setzt natürlich voraus, das elastische Festigkeitsverhalten des Bandes höher als das des Walzenkerns bzw. seines Bezugs ist.This of course assumes that the elastic strength behavior of the band is higher than that of the roller core or its reference.

Die Zugspannung kann bis zur Fließgrenze des Bandes reichen.The tensile stress can reach up to the yield point of the band.

In Abhängigkeit vom Material des Walzenkerns bzw. seines Bezugs sollte die Eigenspannung des Bandes auf Werte von mehr als 600 Mpa eingestellt werden.Depending on the material of the roller core or its reference, the residual stress of the belt should be set to values of more than 600 MPa.

Hinsichtlich einer verbesserten Stabilität ist es auch von Vorteil, wenn im Bereich der Walzenenden eine höhere oder niedrigere Eigenspannung des Bandes eingestellt wird als im Bereich der Walzenmitte. Durch geeignetes Einstellen der Eigenspannung kann insbesondere einem Aufklaffen der einzelnen Windungen des Bandes entgegengewirkt werden. Dadurch gelangt auch weniger Feuchtigkeit in den Bereich zwischen dem Band und dem Walzenkern, so dass die Korrosionsgefahr entsprechend verringert oder ausgeschlossen ist.With regard to improved stability, it is also advantageous if a higher or lower residual stress of the strip is set in the region of the roll ends than in the region of the roll center. By suitably adjusting the residual stress, it is possible, in particular, to prevent the individual turns of the strip from unfolding. As a result, less moisture enters the area between the belt and the roller core, so that the risk of corrosion is correspondingly reduced or eliminated.

Die Eigenspannung des Bandes kann insbesondere durch entsprechendes Beschleunigen oder Verzögern des Bandes beim Aufwickeln eingestellt werden. Dabei erhöht sich die Eigenspannung des Bandes durch Verzögern, während sie durch Beschleunigen verringert wird.The residual stress of the belt can be adjusted in particular by appropriate acceleration or deceleration of the belt during winding. In this case, the residual stress of the band increases by deceleration, while it is reduced by accelerating.

Wird das Band durch Drehen des Walzenkerns aufgewickelt, so wird das Beschleunigen oder Verzögern des Bandes bevorzugt durch zusätzlich auf das Band einwirkende Antriebs- und Bremsmittel bewirkt.If the tape is wound by rotating the roll core, the acceleration or deceleration of the tape is preferably effected by additionally acting on the tape driving and braking means.

Gemäß einer vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens werden zum Beschleunigen oder Verzögern des Bandes zwei einander gegenüberliegende, angetriebene Beschleunigungs-/Verzögerungsstrecken eingesetzt. Das Band wird zwischen diesen hindurchgeführt. Bevorzugt sind zwei solche Walzenpaare vorgesehen.According to an advantageous embodiment of the method according to the invention, two opposing driven acceleration / deceleration sections are used to accelerate or decelerate the strip. The tape is passed between them. Preferably, two such pairs of rollers are provided.

Das Beschleunigen oder Verzögern des Bandes kann vorteilhafterweise durch Beschleunigen bzw. Verzögern mindestens eines Walzenpaares erfolgen, durch welches das Band unter Reibung hindurchgeführt wird.The acceleration or deceleration of the belt can advantageously be carried out by accelerating or decelerating at least one pair of rollers, through which the belt is passed under friction.

Von Vorteil ist insbesondere auch, wenn das Beschleunigen oder Verzögern des Bandes durch Beschleunigen bzw. Verzögern des Wickels erfolgt, von dem das Band abgezogen wird. Dabei wird dieser Wickel vorzugsweise mittels eines geregelten Motors entsprechend beschleunigt oder verzögert, um das Band mit einer insbesondere konstanten, geregelten Zugspannung zu beaufschlagen.In particular, it is also advantageous if the acceleration or deceleration of the strip takes place by accelerating or decelerating the roll, from which the strip is pulled off. In this case, this winding is preferably accelerated or decelerated accordingly by means of a controlled motor in order to apply a particularly constant, constant tension to the belt.

Eine spezielle Möglichkeit der Einstellung bzw. Regelung der Eigenspannung besteht also darin, zusätzlich zum Antrieb des Walzenkerns auch den Wickel antreibbar und/oder abbremsbar auszugestalten, von dem das Profilband abgewickelt wird. Beispielsweise durch entsprechende Einstellungen der Drehzahlen bzw. Drehmomente des Walzenkerns einerseits und des Wickels andererseits kann die gewünschte Eigenspannung des Profilbandes eingestellt werden.A special way of adjusting or regulating the residual stress is therefore to design in addition to the drive of the roller core and the winding drivable and / or braked, from which the profile strip is unwound. For example, by appropriate settings of the speeds or torques of the roller core on the one hand and the coil on the other hand, the desired residual stress of the profile strip can be adjusted.

Eine andere Möglichkeit besteht, wie bereits erwähnt, darin, vor dem Auflaufen des Bandes auf den Walzenkern mindestens ein Walzenpaar vorzusehen, durch das das vorzugsweise profilierte Band unter Reibung hindurchgeführt ist. Durch entsprechendes Beschleunigen oder Abbremsen des Walzenpaars kann wiederum die Eigenspannung des Profilbandes in gewünschter Weise eingestellt werden.Another possibility, as already mentioned, is to provide at least one pair of rollers, before the belt runs onto the roller core, through which the preferably profiled belt passes under friction. By appropriate acceleration or deceleration of the roller pair, in turn, the residual stress of the profile strip can be adjusted in the desired manner.

Gemäß einer bevorzugten praktischen Ausgestaltung des erfindungsgemäßen Verfahrens wird die Eigenspannung des Bandes während des Aufwickelns gemessen und der festgestellte Wert für eine Regelung der Eigenspannung verwendet. Hierdurch wird sichergestellt, dass die gewünschte Eigenspannung in der fertigen Walze mit hoher Genauigkeit erreicht wird.According to a preferred practical embodiment of the method according to the invention, the residual stress of the strip is measured during winding and the value determined is used for regulating the residual stress. This ensures that the desired residual stress in the finished roll is achieved with high accuracy.

Zur Messung der Bandspannung können Messeinrichtungen eingesetzt werden, die während des Wickelvorgangs die Zugkräfte im Band messen.To measure the belt tension measuring devices can be used, which measure the tensile forces in the band during the winding process.

Eine möglichst genaue Einstellung der Band- bzw. Eigenspannung ist insbesondere durch den Einsatz eines so genannten Spannungssensors möglich.The most accurate adjustment of the belt or residual stress is possible in particular by the use of a so-called voltage sensor.

Zweckmäßigerweise wird das Band beim Aufwickeln an wenigstens einer Stelle radial auf den Walzenkern gepresst. Dabei kann beispielsweise so vorgegangen werden, wie dies in der DE 25 45 146 A1 beschrieben ist.Conveniently, the tape is pressed during winding at least one point radially on the roller core. In this case, for example, proceed as described in the DE 25 45 146 A1 is described.

Für das Band hat sich Stahl, insbesondere Edelstahl, als geeignetes Material herausgestellt. Dies ist selbst bereits weitgehend korrosionsfest und genügt in vorteilhafter Weise den weiteren Anforderungen an einen Walzenbezug der genannten Art.For the band, steel, especially stainless steel, has proven to be a suitable material. This is itself already largely corrosion resistant and satisfies the other requirements for a roll cover of the type mentioned in an advantageous manner.

Insbesondere dann, wenn das Band als Stahlband ausgeführt ist und der Walzenkern oder sein Bezug aus Gusseisen oder Baustahl besteht, sollte die Eigenspannung des Bandes im Interesse einer optimalen Einbettung des Bandes in den Walzenkern auf Werte von über 600 MPa eingestellt werden.In particular, when the strip is designed as a steel strip and the roll core or its cover made of cast iron or structural steel, the residual stress of the strip should be set to values of over 600 MPa in the interest of optimum embedding of the strip in the roll core.

Eine zusätzliche Maßnahme zur Verringerung der Korrosion besteht darin, dass das Band vor dem Aufwickeln mit einer korrosionshemmenden und/oder reibungserhöhenden Schicht versehen wird. Bevorzugt wird hierbei das Band während des Wickelvorgangs vor dem Auflaufen auf den Walzenkern durch eine Vorrichtungsstrecke geführt, die das Band mit der Schicht versieht.An additional measure to reduce corrosion is that the tape is provided with a corrosion-inhibiting and / or friction-enhancing layer before being wound up. In this case, the strip is preferably guided during the winding process prior to emergence onto the roll core through a device section which provides the strip with the layer.

Durch das Versehen des Bandes mit einer entsprechenden Schicht vor dem Aufwickeln kann die Korrosion zwischen dem Walzenkern und dem Walzenbezug verhindert oder zumindest verringert werden. Zudem kann eine solche Schicht den Reibungskoeffizienten der Oberfläche des Bandes erhöhen, wodurch wieder Bewegungen zwischen den einzelnen Bandwindungen und Bewegungen dieser Bandwindungen relativ zum Walzenkern im Betrieb zumindest verringert werden. Beides führt vorteilhafterweise zu einer deutlichen Erhöhung der Haltbarkeit der Walze.By providing the strip with a corresponding layer prior to winding, corrosion between the roll core and the roll cover can be prevented or at least reduced. In addition, such a layer can increase the coefficient of friction of the surface of the belt, whereby at least movements between the individual belt windings and movements of these belt windings relative to the roller core during operation are at least reduced. Both leads advantageously to a significant increase in the durability of the roller.

Dabei wird das Band vorteilhafterweise mit einer solchen Schicht versehen, dass sich wieder ein gegenüber einer unbeschichteten glatten Bandoberfläche um den Faktor 3 bis 4 erhöhter Reibungskoeffizient einstellt.In this case, the band is advantageously provided with such a layer that again sets a relation to an uncoated smooth strip surface by a factor of 3 to 4 increased coefficient of friction.

Als Beschichtung hat sich insbesondere eine Chrom-Nickel-Legierung als vorteilhaft herausgestellt. Gute Ergebnisse werden auch mit einer Wolframschicht, einer Wolframcarbidschicht, einer Zinkschicht, einer Zinnschicht, einer Lackschicht oder einer Schicht aus einer Schutzfarbe, wie beispielsweise Mennige, erzielt. Grundsätzlich können auch andere geeignete Materialien oder ein Tauchbad aus Dichtungsmasse oder aushärtbarem Kunststoff verwendet werden.As a coating, in particular a chromium-nickel alloy has been found to be advantageous. Good results are also achieved with a tungsten layer, a tungsten carbide layer, a zinc layer, a tin layer, a lacquer layer or a layer of a protective color, such as Mennige. In principle, other suitable materials or a dip bath of sealant or thermosetting plastic can be used.

Hinsichtlich der insbesondere nach dem erfindungsgemäßen Verfahren hergestellten Walze ist wesentlich, dass das Band teilweise in den Walzenkern eingebettet ist.With regard to the roll manufactured in particular by the method according to the invention, it is essential that the strip is partially embedded in the roll core.

Die Einbettung des Bandes stabilisiert dessen Lage und verhindert so wirkungsvoll ein Abheben des Bandes vom Walzenkern oder Relativverschiebungen der Bandwickel. Im Ergebnis verbessert sich die Haltbarkeit des Walze auch bei großen Belastungen erheblich.The embedding of the band stabilizes its position and thus effectively prevents lifting of the band from the roll core or relative displacements of the Tape winding. As a result, the durability of the roller improves considerably even under heavy loads.

Vorteile hinsichtlich Stabilität und Herstellung ergeben sich, wenn der Walzenkern oder dessen Bezug aus Gusseisen oder Baustahl und das Band aus Stahl, insbesondere Edelstahl bestehen.Advantages in terms of stability and production arise when the roll core or its cover made of cast iron or structural steel and the band made of steel, in particular stainless steel.

Dabei hat es sich für eine Fixierung des Bandes als optimal herausgestellt, wenn das Band um 0 bis 0,5 mm in den Walzenkern gedrückt ist.It has proven to be optimal for a fixation of the tape when the tape is pressed by 0 to 0.5 mm in the roll core.

Nachfolgend soll die Erfindung an einem Ausführungsbeispiel näher erläutert werden. In der beigefügten Zeichnung zeigt:

Figur 1:
eine schematische, teilweise geschnittene Ansicht einer erfindungsgemäßen Vorrichtung zur Herstellung einer erfindungsgemäßen Walze und
Figur 2:
eine schematische Querschnittsdarstellung eines Teils des durch das aufgewickelte Profilband 1 gebildeten Walzenbelags.
The invention will be explained in more detail with reference to an exemplary embodiment. In the attached drawing shows:
FIG. 1:
a schematic, partially sectioned view of a device according to the invention for producing a roll according to the invention and
FIG. 2:
a schematic cross-sectional view of a portion of the roll covering formed by the wound profile strip 1.

Die in Figur 1 gezeigte Herstellungsmaschine umfasst einen Ständer 7 zum drehbaren Lagern eines Stahlprofilwickels 2. Von dem Bandwickel 2 wird ein Stahlprofilband 1 zu einem Walzenkern 3 geführt, der ebenfalls auf einem Ständer 8 drehbar gelagert ist und aus Stahl besteht.In the FIG. 1 The production machine shown comprises a stand 7 for rotatably supporting a steel profile roll 2. From the tape roll 2, a steel profile strip 1 is guided to a roll core 3, which is also rotatably mounted on a stand 8 and made of steel.

Das Stahlprofilband 1 wird an einem Ende des Walzenkerns 3 umfangsseitig befestigt, beispielsweise angeschweißt. Durch Drehen des Walzenkerns 3 um seine Längsachse 9 und axiales Bewegen des Bandes 1 vom Ende weg wird das Stahlprofilband 1 vom Wickel 2 abgezogen und auf den Walzenkern 3 spiralförmig aufgewickelt. Dabei wird das Stahlprofilband 1 durch mehrere über den Umfang des Walzenkerns verteilt angeordnete Anpressrollen 10 radial auf den Walzenkern 3 gepresst, um die einzelnen Windungen des Stahlprofilbandes 1 fest aneinander anzulegen. Die Anpressrollen 10 sind dabei in einer Halterung gelagert, die durch hier nicht dargestellte Mittel in Axialrichtung des Walzenkerns 3 verschiebbar ist.The steel profile strip 1 is attached circumferentially at one end of the roll core 3, for example, welded. By turning the roller core 3 about its longitudinal axis 9 and axially moving the belt 1 away from the end, the steel profile belt 1 is pulled off the reel 2 and spirally wound onto the roller core 3. In this case, the steel profile strip 1 is radially pressed by a plurality of distributed over the circumference of the roll core arranged pressing rollers 10 on the roll core 3 to the individual turns of the steel profile strip 1 firmly together to apply. The pressure rollers 10 are mounted in a holder which is displaceable by means not shown here in the axial direction of the roller core 3.

Wie anhand der Figur 2 zu erkennen ist, ist das Profilband 1 derart profiliert, dass es auf seiner einen Vertikalseite einen Vorsprung 11 und auf seiner anderen Vertikalseite eine entsprechende Nut 12 aufweist. Aufeinanderfolgende Windungen des Profilbandes 1 greifen dadurch formschlüssig ineinander. Zudem ist das Profilband 1 an seiner Außenkante 13 mit einem Einschnitt 14 versehen, der im fertigen Walzenbezug eine schraubenförmig verlaufende Rille bildet.As based on the FIG. 2 can be seen, the profiled strip 1 is profiled so that it has a projection 11 on its one vertical side and a corresponding groove 12 on its other vertical side. Successive turns of the profile strip 1 thereby engage positively in one another. In addition, the profile band 1 is provided on its outer edge 13 with a recess 14 which forms a helical groove in the finished roll cover.

Zwischen dem Stahlprofilwickel 2 und dem Walzenkern 3 ist eine Einrichtung 6 zum Aufbringen einer Oberflächenstruktur auf das Profilband 1 und eine hier nicht dargestellte Einrichtung zur Beschichtung des Profilbandes 1 mit einer korrosionshemmenden und/oder reibungserhöhenden Schicht angeordnet. Durch die Einrichtung 6 zum Aufbringen einer Oberflächenstruktur kann das Profilband 1 bspw. mit einer durch bspw. Schleifen oder Strahlen, wie bspw. Sandstrahlen, aufgerauten Oberfläche zur Ausbildung der Oberflächenstruktur versehen werden. Beim dargestellten Ausführungsbeispiel handelt es sich im Fall der Einrichtung 6 zur Aufbringung einer Oberflächenstruktur um ein Rändelrad 16 mit Hilfe dessen auf die Oberfläche des Profilbandes 1 eine Oberflächenstruktur aufgerändelt und oder aufgeriffelt wird. Bei der Beschichtungseinrichtung kann es sich bspw. um eine Sprühvorrichtung handeln, mit der das Profilband 1 mit geeignetem Material, beispielsweise einer Chrom-Nickel-Legierung, Wolframcarbid, Zink, Zinn, Lack oder einer Schutzfarbe wie Mennige besprüht werden kann. Alternativ zu der Sprühvorrichtung kann auch ein Tauchbad vorgesehen sein, insbesondere ein galvanisches Bad, ein Bad aus einer Dichtungsmasse oder aus aushärtbarem Kunststoff, durch das Profilband 1 vor dem Aufwickeln auf den Walzenkern 3 hindurchgeführt wird.Between the steel profile roll 2 and the roll core 3, a device 6 for applying a surface structure on the profile strip 1 and a device not shown here for coating the profile strip 1 with a corrosion-inhibiting and / or friction-increasing layer is arranged. By the means 6 for applying a surface structure, the profile band 1, for example, with a by example. Sanding or blasting, such as. Sandblasting, roughened surface to form the surface structure can be provided. In the exemplary embodiment shown, in the case of the device 6 for applying a surface structure, a knurling wheel 16 with the aid of which a surface structure is knurled and / or ruffled on the surface of the profile strip 1. The coating device can be, for example, a spray device with which the profile strip 1 can be sprayed with suitable material, for example a chromium-nickel alloy, tungsten carbide, zinc, tin, lacquer or a protective color such as red lead. As an alternative to the spraying device, it is also possible to provide an immersion bath, in particular a galvanic bath, a bath of a sealing compound or of curable plastic, through which the profiled strip 1 is passed onto the roll core 3 before being wound up.

Es können insbesondere auch Mittel zum Aufbringen einer die Oberflächenstruktur bildenden Schicht auf das Strukturband 1 oder neben den Mitteln zum Beschichten des Strukturbandes 1 zusätzlich Mittel zum Einbringen einer Oberflächenstruktur in die erhaltene Schicht vorgesehen sein.In particular, it is also possible to use means for applying a layer forming the surface structure to the structural band 1 or next to the means for coating of the structural band 1 additionally be provided for introducing a surface structure into the layer obtained.

Die betreffende Einrichtung 6 zum Aufbringen der Oberflächenstruktur kann insbesondere auch Mittel zum Aufbringen einer die Oberflächenstruktur bildenden Folienschicht auf das Strukturband 1 umfassen.The relevant device 6 for applying the surface structure may in particular also comprise means for applying a film layer forming the surface structure to the structural band 1.

Mittels der genannten Einrichtung 6 zum Aufbringen der Oberflächenstruktur auf das Profilband 1 kann das vorzugsweise aus Edelstahl bestehende Profilband 1 auf den beiden Seiten, an denen sich die axial aufeinanderfolgenden spiralförmigen Bandwindungen berühren, und/oder auf seiner den Walzenkern 3 berührenden Seite mit einer Oberflächenstruktur versehen werden. Mittels der betreffenden Einrichtung wird das Profilband 1 während des Wickelvorgangs vor dem Auflaufen auf den Walzenkern 3 mit der Oberflächenstruktur versehen. Die betreffende Einrichtung kann insbesondere eine Vorrichtungsstrecke umfassen, durch die das Profilband 1 geführt wird und die das Profilband 1 mit der Oberflächenstruktur versieht.By means of said device 6 for applying the surface structure to the profile strip 1, the preferably made of stainless steel profile strip 1 on the two sides, where the axially successive spiral band turns touch, and / or provided on its side touching the roller core 3 with a surface structure become. By means of the device concerned, the profiled strip 1 is provided during the winding process before emergence onto the roll core 3 with the surface structure. The device in question may in particular comprise a device section through which the profiled strip 1 is guided and which provides the profiled strip 1 with the surface structure.

Die mittels der betreffenden Einrichtung aufgebrachte Oberflächenstruktur kann insbesondere so gewählt sein, dass sich gegenüber einer nicht strukturierten glatten Bandoberfläche eine Erhöhung des Reibungskoeffizienten um den Faktor 3 bis 4 ergibt.The surface structure applied by means of the device in question may, in particular, be selected such that an increase in the coefficient of friction by a factor of 3 to 4 results compared to a non-structured smooth strip surface.

Alternativ oder zusätzlich kann auch mit einer auf das Profilband 1 aufgebrachten korrosionshemmenden und/oder reibungserhöhenden Schicht der Reibungskoeffizient gegenüber einer unbeschichteten glatten Bandoberfläche beispielsweise um den Faktor 3 bis 4 erhöht werden. So wird mit der Ummantelung des Profilbandes 1 beispielsweise eine Erhöhung des Reibungskoeffizienten µ von einem Wert im Bereich von 0,16 bis 0,19 auf einem Wert von etwa 0,53 bis etwa 0,7 erreicht werden.Alternatively or additionally, with a corrosion-inhibiting and / or friction-enhancing layer applied to the profiled strip 1, the coefficient of friction compared to an uncoated smooth strip surface can be increased, for example, by a factor of 3 to 4. Thus, for example, an increase in the coefficient of friction μ from a value in the range of 0.16 to 0.19 to a value of about 0.53 to about 0.7 can be achieved with the sheath of the profiled strip 1.

Mit der Beschichtung wird die Oberflächenrauhigkeit von einem Wert von beispielsweise etwa 0,4 µm auf einen Wert von beispielsweise etwa 0,8 µm erhöht.With the coating, the surface roughness is increased from a value of, for example, about 0.4 μm to a value of, for example, about 0.8 μm.

Mit der Vergrößerung der Oberflächenrauhigkeit durch die Oberflächenstruktur bzw. die korrosionshemmende und/oder reibungserhöhende Schicht werden Bewegungen der Bandwindungen relativ zueinander sowie des Profilbandes 1 relativ zum Walzenkern 3 verhindert oder zumindest reduziert.With the increase of the surface roughness by the surface structure or the corrosion-inhibiting and / or friction-increasing layer, movements of the band windings relative to each other and of the profiled strip 1 relative to the roll core 3 are prevented or at least reduced.

Der Stahlprofilwickel 2 kann außerdem um seine Drehachse beschleunigt oder verzögert werden. Hierdurch kann im Profilband 1 eine Eigenspannung eingestellt werden, indem beim Abziehen des Profilbandes 1 vom Wickel 2 durch den rotierenden Walzenkern 3 der Wickel 2 beschleunigt oder verzögert wird. Dabei kann die Eigenspannung an den beiden Enden des Walzenkerns 3 höher oder niedriger eingestellt werden als in der Mitte des Walzenkerns 3. Zudem wird die Eigenspannung bevorzugt so eingestellt, dass sich in der fertigen Walze möglichst keine Relativbewegung zwischen Walzenkern 3 und aufgewickeltem Profilband 1 ergibt.The steel profile wrap 2 can also be accelerated or decelerated about its axis of rotation. As a result, in the profile band 1, a residual stress can be set by the winding 2 is accelerated or decelerated when removing the profile strip 1 from the winding 2 by the rotating roller core 3. In this case, the internal stress at the two ends of the roll core 3 can be set higher or lower than in the middle of the roll core 3. In addition, the residual stress is preferably set so that in the finished roll as possible no relative movement between the roll core 3 and wound profile strip 1 results.

Des Weiteren sind zur Regelung der Eigenspannung des Profilbandes 1 Messrollen 15 vorgesehen, die direkt oder indirekt die Eigenspannung des Profilbandes messen und die Messwerte an eine nicht dargestellte Regelungseinrichtung übergeben.Furthermore, to control the residual stress of the profiled strip 1, measuring rollers 15 are provided which directly or indirectly measure the residual stress of the profiled strip and transfer the measured values to a control device (not shown).

Außerdem ist gemäß Figur 1 eine Antriebs- und Bremseinrichtung 4 zwischen dem Stahlprofilwickel 2 und dem Walzenkern 3 angeordnet. Die Antriebs- und Bremseinrichtung 4 umfasst zwei Walzenpaare 5, zwischen denen das Profilband 1 unter Reibung hindurchgeführt ist. Durch Abbremsen oder Beschleunigen der Walzenpaare 5 kann die Eigenspannung oder innere Spannung des Profilbandes 1 in gewünschter Weise eingestellt werden, was über eine Messrolle 15 und geeignete Regelungsmittel einer Regelung der Eigen- bzw. Innenspannung ermöglicht.In addition, according to FIG. 1 a drive and braking device 4 between the steel profile coil 2 and the roller core 3 is arranged. The drive and braking device 4 comprises two pairs of rollers 5, between which the profile band 1 is passed under friction. By braking or accelerating the pairs of rollers 5, the residual stress or internal stress of the profile strip 1 can be adjusted in a desired manner, which allows a control roller 15 and suitable control means a regulation of the intrinsic or internal stress.

Die Eigenspannung des Bandes 1 wird dabei auf Werte von über 600 MPa eingestellt. Eine derart hohe Spannung übersteigt die Elastizitätsgrenze des Walzenkerns 3 an der Manteloberfläche, so dass das Band 1 in die Manteloberfläche eindringt und dort ein plastische Verformung hervorruft. Dies führt zur Bildung von Rillen in der Manteloberfläche, die einen Teil des Profilbandes 1 umschließen und so durch den Formschluss zwischen Band 1 und Walzenkern 3 die Lage der Bandwindungen stabilisieren.The residual stress of the belt 1 is set to values of more than 600 MPa. Such a high tension exceeds the elastic limit of the roller core 3 on the mantle surface, so that the tape 1 penetrates into the mantle surface and causes a plastic deformation there. This leads to the formation of grooves in the mantle surface which surround part of the profile strip 1 and so on stabilize the position of the tape turns by the positive connection between the belt 1 and the roll core 3.

Das radiale Anpressen des Bandes 1 über die Anpressrollen 10 kann das Eindringen des Profilbandes 1 in den Walzenkern 3 noch in erheblichem Umfang unterstützen.The radial pressing of the band 1 on the pressure rollers 10 can support the penetration of the profile strip 1 in the roll core 3 to a considerable extent.

Vor der Antriebs- und Bremseinrichtung 4 befindet sich noch eine Richtvorrichtung 17, welche das Profilband 1 während des Durchlaufens gerade Ausrichten soll.Before the drive and braking device 4 is still a straightening device 17, which is to align the profile band 1 while passing straight.

Bei der erfindungsgemäßen Vorrichtung bzw. der erfindungsgemäßen Walze ergeben sich außerdem eine verringerte Korrosionsgefahr sowie verringerte Relativbewegung zwischen den einzelnen Windungen des Profilbandes 1 bzw. zwischen dem Profilband 1 und dem Walzenkern 3. Die Haltbarkeit der erfindungsgemäßen Walze ist dadurch gegenüber bekannten Walzen erhöht.In the apparatus according to the invention or the roller according to the invention also results in a reduced risk of corrosion and reduced relative movement between the individual turns of the profile strip 1 and between the profile band 1 and the roller core 3. The durability of the roller according to the invention is increased over known rollers.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
StahlprofilbandSteel profile band
22
Bandwickeltape roll
33
Walzenkernroll core
44
Antriebs- und BremseinrichtungDrive and braking device
55
Walzenpaarroller pair
66
EinrichtungFacility
7,87.8
Ständerstand
99
Längsachselongitudinal axis
1010
AnpressrollenPinch Rollers
1111
Vorsprunghead Start
1212
Nutgroove
1313
Außenkanteouter edge
1414
Einschnittincision
1515
Messrollenmeasuring rollers
1616
Rändelradknurl
1717
Richtvorrichtungstraightener

Claims (20)

  1. Method for manufacturing a roll for a machine for producing and/or finishing a paper, board, tissue or other fibrous web, in which a profiled strip (1) is wound spirally around a shell-like roll core (3), characterized in that
    during the winding of the strip (1), its inherent tension is set or regulated to such a level that the elastic limit of the circumferential surface of the roll core (3) is exceeded.
  2. Method according to Claim 1, characterized in that the inherent tension of the strip (1) is set to values of more than 600 MPa.
  3. Method according to one of the preceding claims, characterized in that
    a higher or lower inherent tension of the strip (1) is set in the region of the ends of the roll than in the region of the centre of the roll.
  4. Method according to one of the preceding claims, characterized in that
    the inherent tension is set by accelerating or decelerating the strip (1) during winding.
  5. Method according to Claim 4, characterized in that the strip (1) is wound on by rotating the roll core (3), and in that the acceleration or deceleration of the strip (1) is effected by drive and braking means additionally acting on the strip (1).
  6. Method according to Claim 4 or 5, characterized in that
    in order to accelerate or decelerate the strip (1), two mutually opposite driven acceleration/deceleration sections (4) are used and the strip (1) is led through between these.
  7. Method according to one of Claims 4 to 6, characterized in that
    the acceleration or deceleration of the strip (1) is carried out by accelerating or decelerating at least one pair of rolls (5) through which the strip (1) is led under friction.
  8. Method according to one of Claims 4 to 7, characterized in that
    the acceleration or deceleration of the strip (1) is carried out by accelerating or decelerating a coil (2) from which the strip (1) is drawn off.
  9. Method according to Claim 8, characterized in that the coil (2) from which the strip (1) is drawn off is accelerated or decelerated appropriately by means of a regulated motor, in order to apply an in particular constant, regulated tensile stress to the strip (1).
  10. Method according to one of the preceding claims, characterized in that
    the inherent tension of the strip (1) is measured during the winding and the value established is used to regulate the inherent tension.
  11. Method according to one of the preceding claims, characterized in that
    during winding, the strip (1) is pressed radially onto the roll core (3) at at least one point.
  12. Method according to one of the preceding claims, characterized in that
    the strip (1) used is a steel strip, in particular a stainless steel strip.
  13. Method according to one of the preceding claims, characterized in that
    before being wound on, the strip (1) is provided with a corrosion-inhibiting and/or friction-increasing layer.
  14. Method according to Claim 13, characterized in that
    during the winding operation and before running onto the roll core (3), the strip is led through a device (6) which provides the strip (1) with the layer.
  15. Method according to Claim 13 or 14, characterized in that
    the strip (1) is provided with a layer such that a smooth strip surface with a coefficient of friction increased by a factor 3 to 4 as compared with an uncoated one is established.
  16. Method according to one of Claims 13 to 15, characterized in that
    a chromium-nickel alloy, tungsten carbide, zinc, tin, lacquer and/or a protective paint such as red lead is used for the corrosion-inhibiting layer.
  17. Roll for a machine for producing and/or finishing a paper, board, tissue or other fibrous web, having a shell-like roll core (3) and a profiled strip (1) wound spirally around the roll core (3), in particular manufactured in accordance with a method according to one of the preceding claims, the strip (1) being partly embedded in the roll core (3), characterized in that
    during the winding of the strip (1), the circumferential surface of the roll core (3) has been deformed plastically to form a permanent groove, which accommodates and thus stabilizes part of the strip (1).
  18. Roll according to Claim 17, characterized in that the roll core (3) or its cover consists of cast iron or steel.
  19. Roll according to Claim 17 or 18, characterized in that
    the strip (1) consists of steel, in particular stainless steel.
  20. Roll according to one of Claims 17 to 19, characterized in that
    the strip (1) is pressed into the roll core (3) by up to 0.5 mm.
EP07105069A 2006-07-14 2007-03-28 Roller and method for its manufacture Not-in-force EP1878828B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006032866A DE102006032866A1 (en) 2006-07-14 2006-07-14 roll cover

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Publication Number Publication Date
EP1878828A1 EP1878828A1 (en) 2008-01-16
EP1878828B1 true EP1878828B1 (en) 2011-02-23

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EP (1) EP1878828B1 (en)
AT (1) ATE499484T1 (en)
DE (2) DE102006032866A1 (en)

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Publication number Priority date Publication date Assignee Title
CN110924218B (en) * 2019-12-31 2021-08-10 贵州金马包装材料有限公司 Calendering device for color card paper

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI54953C (en) 1974-10-09 1979-04-10 Valmet Oy FOERFARANDE VID TILLVERKNING AV EN RAEFFLAD BELAEGGNING PAO EN VALS I EN PAPPERSMASKIN GENOM ATT LINDA ETT PROFILBAND
AT355401B (en) 1978-04-03 1980-03-10 Stroemungsmasch Anst METHOD FOR THE PRODUCTION OF ROLLER ROLLERS FOR THE DRAINAGE OF MATERIAL RAILS
JPS6411373B2 (en) * 1980-12-24 1989-02-23 Enberu Rakumatorobitsuchi Kisumatorin

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DE502007006531D1 (en) 2011-04-07
ATE499484T1 (en) 2011-03-15
DE102006032866A1 (en) 2008-01-17

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