EP0176610A1 - Roll for machines for the paper industry or the like - Google Patents

Roll for machines for the paper industry or the like Download PDF

Info

Publication number
EP0176610A1
EP0176610A1 EP84111680A EP84111680A EP0176610A1 EP 0176610 A1 EP0176610 A1 EP 0176610A1 EP 84111680 A EP84111680 A EP 84111680A EP 84111680 A EP84111680 A EP 84111680A EP 0176610 A1 EP0176610 A1 EP 0176610A1
Authority
EP
European Patent Office
Prior art keywords
corrugated
sections
straight
roller
radially outer
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
EP84111680A
Other languages
German (de)
French (fr)
Other versions
EP0176610B1 (en
Inventor
Emil Holz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Finckh Fiber Systems GmbH and Co KG
Original Assignee
Hermann Finckh Maschinenfabrik GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hermann Finckh Maschinenfabrik GmbH and Co filed Critical Hermann Finckh Maschinenfabrik GmbH and Co
Priority to AT84111680T priority Critical patent/ATE36363T1/en
Priority to DE8484111680T priority patent/DE3473312D1/en
Priority to EP84111680A priority patent/EP0176610B1/en
Priority to US06/773,361 priority patent/US4619737A/en
Priority to CA000491354A priority patent/CA1251081A/en
Priority to JP60212708A priority patent/JPS6184411A/en
Publication of EP0176610A1 publication Critical patent/EP0176610A1/en
Application granted granted Critical
Publication of EP0176610B1 publication Critical patent/EP0176610B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/60—Cylinder moulds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/44—Watermarking devices
    • D21F1/46—Dandy rolls

Definitions

  • the invention relates to a roller for machines of the paper industry or the like, in particular a sheet forming roller such as e.g. a circular screen cylinder, a forming roller or a Aufgautschwalze, with a support tube on which several, at least approximately in the circumferential direction and upright in the radial direction upright tapes are fastened, straight and corrugated band sections in the axial direction and the straight band sections at connection points through the corrugated band sections are connected to one another, the latter having recesses on their radially outer edge, and with a covering fabric forming the roller circumference and being supported at least on the corrugated belt sections, between which and the belts a flow in at their connection points in the region of the radially outer edge of the corrugated belt sections Passages permitting circumferential direction are provided.
  • a sheet forming roller such as e.g. a circular screen cylinder, a forming roller or a Aufgautschwalze
  • a support tube on which several, at least approximately in the circumferential direction
  • Such a roller, but without a support tube, is known from DE-AS 21 48 361.
  • the straight and wavy bands are of equal height in the radial direction, and
  • the corrugated band sections have recesses on their radially outer edge at the connection points, which allow flow in the circumferential direction - without these recesses, acute-angled pockets would form at the connection points between the straight and the corrugated band sections, in which because of the Paper-water accumulations occur on the outer edges of the covering fabric when the rotating roller plunges into the wet paper web.
  • the covering fabric lay directly on the outside edges of the strip, the recesses in the corrugated strips would not be sufficient to prevent disadvantageous water accumulation on the outside edges of the corrugated strips; therefore, a backing fabric is arranged in the known roller between the belts and the cover fabric.
  • This not only increases the cost of roll production, it also brings with it a whole series of additional disadvantages: it reduces the free passage area of the roll circumference, increases the risk of contamination for the covering fabric and impairs the concentricity of the roll.
  • the invention was therefore based on the object to improve the known roller so that the underlay fabric can be dispensed with, which can be achieved according to the invention in that the corrugated strip sections are provided approximately in the middle of the connection points on their radially outer edge with additional recesses and the covering fabric immediately at least on the corrugated band sections.
  • the additional recesses in the corrugated belt sections not only enable additional flow in the circumferential direction between the covering fabric and the belt sections supporting it, but also reduce the total support area for the covering fabric and thus, like the omission of the underlay fabric, contribute to increasing the free passage area of the roll circumference, without impairing the quality of the support of the covering fabric.
  • the covering fabric is also subject to a lower risk of contamination, and finally the roller has a better concentricity than the known roller described due to the lack of a base fabric.
  • the corrugated band sections project beyond the straight band sections in the radial direction, so that passages are left at the junctures between the corrugated band sections and the covering fabric, which allow a flow in the circumferential direction.
  • the straight belts can be made thicker, since this does not increase the effective support surface for the covering fabric and consequently does not reduce the free passage area of the roll circumference. Thicker straight band sections also lead to wider passages for flow in the circumferential direction.
  • the straight bands form closed rings which are shrunk onto the support tube. It is then advisable to arrange the corrugated strips at a radial distance from the support tube so that the straight strip sections protrude inward over the corrugated strip sections in the radial direction and sit on the support tube, with pressure compensation between the individual strips lying between the straight strips being brought about Ring channels, the straight band sections are provided with recesses on their radially inner edge.
  • FIGS. 1 to 4 show a roller 10 with a circular cylindrical support tube 12, preferably made of stainless steel, on the ends of which end rings 14 are fastened. Furthermore, the support tube 12 holds annular straight strips 18 which are arranged at an axial distance from one another and are shrunk onto the support tube and between which annular corrugated strips 18 are welded. In the embodiment 1 to 4, the corrugated strips 18 protrude beyond the straight strips 16, and their radially outer edges are aligned with one another and with the outer circumferential surface of the end rings 14. On the other hand, the corrugated strips 18 end at a radial distance from the support tube 12. The welding connection points at which the Straps 16 and 18 attached to each other have been designated 20.
  • a covering fabric 22 lies directly on the radially outer edges of the corrugated bands 18 and on the end rings 14 and forms a self-contained circular cylinder.
  • passages 26 are formed directly within the covering fabric 22 between the latter and the edges 16a of the straight strips and between the corrugated strips 18, which allow a flow in the circumferential direction. These passages have a particularly advantageous effect when adjacent corrugated bands are offset from one another in the circumferential direction by half a wavelength, as is the case with the corrugated bands 18 'of the embodiment shown in FIG. 5.
  • the free passage area of the covering fabric 22, which has already been increased by the resetting of the straight strips 16, can be further increased by means of central recesses 18b in the region of the radially outer edges 18a of the corrugated strips 18 and 18 ', respectively between the covering fabric 22 and the belts supporting it, further passages are generated which allow flow in the circumferential direction of the roller, as was represented by arrows A in FIGS. 2 and 5.
  • these recesses 18b further reduce the risk of water accumulation on the radially outer edges of the belts supporting the covering fabric, which can impair the sheet formation process during paper production.
  • the straight belts 16 are provided with openings 16c, which in particular adjoin the support tube 12 and serve the following purpose: Since the support tube 12 forms a roller body which is closed on its circumference and onto which the honeycomb structure carrying the cover fabric 22 is shrunk, pressure compensation is necessary between the ring channels lying between the straight belts 16 - if the fiber suspension flows towards the outside in the radial direction during the sheet formation, air must be able to escape from the ring channels mentioned in the circumferential direction of the roller; without the openings 16c, pressure differences could form between the ring channels, which would prevent uniform sheet formation.
  • the third embodiment according to FIGS. 6 to 8 differs from the embodiment according to FIGS. 1 to 4 only in that the radially outer edges of the straight bands 16 "are aligned with the radially outer edges of the corrugated bands 18" and the outer peripheral surface of the end rings 14 and that in place of the passages 26, recesses 18c have been provided in the corrugated bands 18 "in the region of the connection points 20.
  • the embodiment according to FIGS. 6 to 8 is particularly suitable for rollers in which the covering fabric is exposed to a high pressure load.
  • the straight and corrugated belt sections which follow one another in the axial direction could also be formed by one or more straight or corrugated belt, which extends helically around the support tube 12.

Landscapes

  • Paper (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

Roller for machines in the paper-making industry or similar, with a honeycomb-shaped roller element formed by upright straight and corrugated bands, extending approximately in the circumferential direction and alternating with each other in the axial direction, said bands being connected by welded joints. To make passages, which allow a throughflow in the circumferential direction, between the roller element and a fabric cover supported by the latter, openings adjoining the fabric cover are provided in the roller element between the fabric cover and the radially outer edges of the corrugated bands in the area of the connecting points and in the center between the connecting points, and in order to increase the open-passage area of the fabric cover, the latter rests directly on the roller element.

Description

Die Erfindung betrifft eine Walze für Maschinen der Papierindustrie oder dergleichen, insbesondere eine Blattbildungswalze wie z.B. einen Rundsiebzylinder, eine Formierwalze oder eine Aufgautschwalze, mit einem Tragrohr, auf dem mehrere, mindestens ungefähr in Umfangsrichtung verlaufende und in radialer Richtung hochkantstehende Bänder befestigt sind, wobei in axialer Richtung gerade und gewellte Bandabschnitte aufeinanderfolgen und die geraden Bandabschnitte an Verbindungsstellen durch die gewellten Bandabschnitte miteinander verbunden sind, welch letztere an ihrer radial äusseren Kante Ausnehmungen aufweisen, sowie mit einem den Walzenumfang bildenden und sich mindestens auf den gewellten Bandabschnitten abstützenden Überzugsgewebe, zwischen dem und den Bändern an deren Verbindungsstellen im Bereich der radial äusseren Kante der gewellten Bandabschnitte einen Durchfluss in Umfangsrichtung zulassende Durchlässe vorgesehen sind.The invention relates to a roller for machines of the paper industry or the like, in particular a sheet forming roller such as e.g. a circular screen cylinder, a forming roller or a Aufgautschwalze, with a support tube on which several, at least approximately in the circumferential direction and upright in the radial direction upright tapes are fastened, straight and corrugated band sections in the axial direction and the straight band sections at connection points through the corrugated band sections are connected to one another, the latter having recesses on their radially outer edge, and with a covering fabric forming the roller circumference and being supported at least on the corrugated belt sections, between which and the belts a flow in at their connection points in the region of the radially outer edge of the corrugated belt sections Passages permitting circumferential direction are provided.

Eine derartige Walze, jedoch ohne Tragrohr, ist aus der DE-AS 21 48 361 bekannt. Bei ihr sind die geraden und gewellten Bänder in radialer Richtung gleich hoch, und zur Vermeidung eines schöpfartigen Vorgangs besitzen an den Verbindungsstellen die gewellten Bandabschnitte an ihrer radial äusseren Kante Ausnehmungen, welche einen Durchfluss in Umfangsrichtung zulassen - ohne diese Ausnehmungen würden sich an den Verbindungsstellen zwischen den geraden und den gewellten Bandabschnitten spitzwinklige Taschen bilden, in denen wegen des sich auf den Bandaussenkanten abstützenden Uberzugsgewebes Papierstoff-Wasser-Ansammlungen entstünden, wenn die sich drehende Walze in die nasse Papierbahn eintaucht. Würde bei der bekannten Walze das Uberzugsgewebe unmittelbar auf den Bandaussenkanten aufliegen, würden die Ausnehmungen in den gewellten Bändern jedoch noch nicht ausreichen, um nachteilige Wasseransammlungen an den Bandaussenkanten der gewellten Bänder zu verhindern; deshalb ist bei der bekannten Walze zwischen den Bändern und dem Uberzugsgewebe noch ein Unterlagsgewebe angeordnet. Dieses verteuert aber nicht nur die Walzenherstellung, sondern es bringt noch eine ganze Reihe zusätzlicher Nachteile mit sich: Es verkleinert die freie Durchgangsfläche des Walzenumfangs, vergrössert die Verschmutzungsgefahr für das Überzugsgewebe und beeinträchtigt die Rundlaufgenauigkeit der Walze.Such a roller, but without a support tube, is known from DE-AS 21 48 361. With her, the straight and wavy bands are of equal height in the radial direction, and To avoid a scoop-like process, the corrugated band sections have recesses on their radially outer edge at the connection points, which allow flow in the circumferential direction - without these recesses, acute-angled pockets would form at the connection points between the straight and the corrugated band sections, in which because of the Paper-water accumulations occur on the outer edges of the covering fabric when the rotating roller plunges into the wet paper web. If, in the known roller, the covering fabric lay directly on the outside edges of the strip, the recesses in the corrugated strips would not be sufficient to prevent disadvantageous water accumulation on the outside edges of the corrugated strips; therefore, a backing fabric is arranged in the known roller between the belts and the cover fabric. This not only increases the cost of roll production, it also brings with it a whole series of additional disadvantages: it reduces the free passage area of the roll circumference, increases the risk of contamination for the covering fabric and impairs the concentricity of the roll.

Der Erfindung lag deshalb die Aufgabe zugrunde, die bekannte Walze so zu verbessern, daß auf das Unterlagsgewebe verzichtet werden kann, was sich erfindungsgemäss dadurch erreichen lässt, daß man die gewellten Bandabschnitte ungefähr in der Mitte der Verbindungsstellen an ihrer radial äusseren Kante mit zusätzlichen Ausnehmungen versieht und das überzugsgewebe unmittelbar zumindest auf die gewellten Bandabschnitte auflegt. Die zusätzlichen Ausnehmungen in den gewellten Bandabschnitten ermöglichen nicht nur einen zusätzlichen Durchfluss in Umfangsrichtung zwischen dem Uberzugsgewebe und den dieses stützenden Bandabschnitten, sondern sie verkleinern die Gesamtstützfläche für das Uberzugsgewebe und tragen so ebenso wie das Weglassen des Unterlagsgewebes zur Vergrösserung der freien Durchgangsfläche des Walzenumfangs bei, ohne daß dadurch die Güte der Abstützung des Uberzugsgewebes beeinträchtigt würde. Bei der erfindungsgemässen Walze unterliegt das Überzugsgewebe auch einer geringeren Verschmutzungsgefahr, und schliesslich weist die Walze dank des fehlenden Unterlagsgewebes eine bessere Rundlaufgenauigkeit als die geschilderte bekannte Walze auf.The invention was therefore based on the object to improve the known roller so that the underlay fabric can be dispensed with, which can be achieved according to the invention in that the corrugated strip sections are provided approximately in the middle of the connection points on their radially outer edge with additional recesses and the covering fabric immediately at least on the corrugated band sections. The additional recesses in the corrugated belt sections not only enable additional flow in the circumferential direction between the covering fabric and the belt sections supporting it, but also reduce the total support area for the covering fabric and thus, like the omission of the underlay fabric, contribute to increasing the free passage area of the roll circumference, without impairing the quality of the support of the covering fabric. In the roller according to the invention, the covering fabric is also subject to a lower risk of contamination, and finally the roller has a better concentricity than the known roller described due to the lack of a base fabric.

Bei einer bevorzugten Ausführungsform überragen die gewellten Bandabschnitte die geraden Bandabschnitte in radialer Richtung, so daß an den Verbindungsstellen zwischen den gewellten Bandabschnitten und dem Uberzugsgewebe Durchlässe freigelassen werden, die einen Durchfluss in Umfangsrichtung zulassen. Bei einer solchen Konstruktion können die geraden Bänder dicker ausgeführt werden, da sich dadurch die wirksame Stützfläche für das Überzugsgewebe nicht vergrössert und infolgedessen die freie Durchgangsfläche des Walzenumfangs nicht vermindert. Dickere gerade Bandabschnitte führen ausserdem zu breiteren Durchlässen für einen Durchfluss in Umfangsrichtung. Bei Walzen für besonders hohe Druckbelastungen empfiehlt es sich jedoch, die gewelllten und die geraden Bandabschnitte so anzuordnen, daß sie denselben Aussendurchmesser aufweisen, wobei die gewellten und/oder die geraden Bandabschnitte an den Verbindungsstellen an ihrer radial äusseren Kante mit Ausnehmungen versehen werden, um an den Verbindungsstellen Durchlässe zu schaffen, die einen Durchfluss in Umfangsrichtung zulassen.In a preferred embodiment, the corrugated band sections project beyond the straight band sections in the radial direction, so that passages are left at the junctures between the corrugated band sections and the covering fabric, which allow a flow in the circumferential direction. With such a construction, the straight belts can be made thicker, since this does not increase the effective support surface for the covering fabric and consequently does not reduce the free passage area of the roll circumference. Thicker straight band sections also lead to wider passages for flow in the circumferential direction. In the case of rollers for particularly high pressure loads, however, it is advisable to arrange the corrugated and the straight belt sections in such a way that they have the same outside diameter, the corrugated and / or the straight belt sections being provided with recesses at their connection points on their radially outer edge, to create passages at the connection points that allow flow in the circumferential direction.

Bei einer bevorzugten Ausführungsform der erfindungsgemässen Walze bilden die geraden Bänder geschlossene Ringe, die auf das Tragrohr aufgeschrumpft sind. Es empfiehlt sich dann, die gewellten Bänder in radialem Abstand vom Tragrohr anzuordnen, so daß die geraden Bandabschnitte über die gewellten Bandabschnitte in radialer Richtung nach innen überstehen und auf dem Tragrohr aufsitzen, wobei zur Herbeiführung eines Druckausgleichs zwischen den einzelnen, zwischen den geraden Bändern liegenden Ringkanälen die geraden Bandabschnitte an ihrer radial inneren Kante mit Ausnehmungen versehen werden.In a preferred embodiment of the roller according to the invention, the straight bands form closed rings which are shrunk onto the support tube. It is then advisable to arrange the corrugated strips at a radial distance from the support tube so that the straight strip sections protrude inward over the corrugated strip sections in the radial direction and sit on the support tube, with pressure compensation between the individual strips lying between the straight strips being brought about Ring channels, the straight band sections are provided with recesses on their radially inner edge.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus den beigefügten Ansprüchen und/oder aus der nachfolgenden Beschreibung sowie der beigefügten zeichneriscnen Darstellung zweier bevorzugter Ausführungsformen der erfindungsgemässen Walze; in der Zeichnung zeigen:

  • Figur 1 eine schaubildliche Darstellung der Walze mit teilweise entferntem Überzugsgewebe;
  • Figur 2 den Ausschnitt "A" aus Figur 1 in grösserem Maßstab;
  • Figur 3 einen Schnitt nach der Linie 3-3 in Figur 2 durch den gemäss Figur 1 linken Endbereich der Walze;
  • Figur 4 einen Schnitt nach der Linie 4-4 in Figur 3;
  • Figur 5 eine der Figur 2 entsprechende Darstellung der zweiten Ausführungsform;
  • Figur 6 eine den Figuren 2 und 5 entsprechende Darstellung einer dritten Ausführungsform;
  • Figur 7 einen der Figur 3 entsprechenden Schnitt durch die dritte Ausführungsform entsprechend der Linie 7-7 in Figur 6, und
  • Figur 8 einen Schnitt nach der Linie 8-8 in Figur 7.
Further features, advantages and details of the invention emerge from the appended claims and / or from the following description and the attached drawing of two preferred embodiments of the roller according to the invention; show in the drawing:
  • Figure 1 is a diagrammatic representation of the roller with a partially removed cover fabric;
  • Figure 2 shows the detail "A" from Figure 1 on a larger scale;
  • 3 shows a section along the line 3-3 in Figure 2 through the left end portion of the roller according to Figure 1;
  • Figure 4 is a section along the line 4-4 in Figure 3;
  • 5 shows a representation of the second embodiment corresponding to FIG. 2;
  • FIG. 6 shows an illustration corresponding to FIGS. 2 and 5 of a third embodiment;
  • 7 shows a section corresponding to FIG. 3 through the third embodiment along the line 7-7 in FIG. 6, and
  • 8 shows a section along the line 8-8 in Figure 7.

Die Figuren 1 bis 4 zeigen eine Walze 10 mit einem vorzugsweise aus rostfreiem Stahl bestehenden, kreiszylindrischen Tragrohr 12, auf dessen Enden Stirnringe 14 befestigt sind. Ferner hält das Tragrohr 12 in axialem Abstand voneinander angeordnete, auf das Tragrohr aufgeschrumpfte, kreisringförmige gerade Bänder 18, zwischen die ringförmige gewellte Bänder 18 eingeschweisst sind. Bei der Ausführungsform nach den Figuren 1 bis 4 überragen die gewellten Bänder 18 die geraden Bänder 16, und ihre radial äusseren Kanten fluchten miteinander sowie mit der Aussenumfangsfläche der Stirnringe 14. Hingegen enden die gewellten Bänder 18 in radialem Abstand vom Tragrohr 12. Die Schweissverbindungsstellen, an denen die Bänder 16 und 18 aneinander befestigt sind, wurden mit 20 bezeichnet. Ein Überzugsgewebe 22 liegt unmittelbar auf den radial äusseren Kanten der gewellten Bänder 18 sowie auf den Stirnringen 14 auf und bildet einen in sich geschlossenen Kreiszylinder.FIGS. 1 to 4 show a roller 10 with a circular cylindrical support tube 12, preferably made of stainless steel, on the ends of which end rings 14 are fastened. Furthermore, the support tube 12 holds annular straight strips 18 which are arranged at an axial distance from one another and are shrunk onto the support tube and between which annular corrugated strips 18 are welded. In the embodiment 1 to 4, the corrugated strips 18 protrude beyond the straight strips 16, and their radially outer edges are aligned with one another and with the outer circumferential surface of the end rings 14. On the other hand, the corrugated strips 18 end at a radial distance from the support tube 12. The welding connection points at which the Straps 16 and 18 attached to each other have been designated 20. A covering fabric 22 lies directly on the radially outer edges of the corrugated bands 18 and on the end rings 14 and forms a self-contained circular cylinder.

Durch die gegenüber den radial äusseren Kanten 18a der gewellten Bänder zurückgesetzten radial äusseren Kanten 16a der geraden Bänder entstehen unmittelbar innerhalb des Überzugsgewebes 22 zwischen diesem und den Kanten 16a der geraden Bänder sowie zwischen den gewellten Bändern 18 Durchlässe 26, welche einen Durchfluss in Umfangsrichtung zulassen. Diese Durchlässe wirken sich besonders vorteilhaft dann aus, wenn einander benachbarte gewellte Bänder in Umfangsrichtung um eine halbe Wellenlänge gegeneinander versetzt angeordnet werden, wie dies bei den gewellten Bändern 18' der in Figur 5 gezeigten Ausführungsform der Fall ist.Due to the radially outer edges 16a of the straight strips, which are set back from the radially outer edges 18a of the corrugated strips, passages 26 are formed directly within the covering fabric 22 between the latter and the edges 16a of the straight strips and between the corrugated strips 18, which allow a flow in the circumferential direction. These passages have a particularly advantageous effect when adjacent corrugated bands are offset from one another in the circumferential direction by half a wavelength, as is the case with the corrugated bands 18 'of the embodiment shown in FIG. 5.

Die freie Durchgangsfläche des überzugsgewebes 22, die schon durch das Zurücksetzen der geraden Bänder 16 vergrössert wurde, lässt sich durch mittlere Ausnehmungen 18b im Bereich der radial äusseren Kanten 18a der gewellten Bänder 18 bzw. 18' noch weiter vergrössern, wodurch zwischen dem Überzugsgewebe 22 und den dieses abstützenden Bändern weitere Durchlässe erzeugt werden, die einen Durchfluss in Umfangsrichtung der Walze gestatten,wie dies in den Figuren 2 und 5 durch Pfeile A dargestellt wurde. Gleichzeitig wird durch diese Ausnehmungen 18b die Gefahr noch weiter vermindert, daß an den radial äusseren Kanten der das Überzugsgewebe abstützenden Bänder Wasseransammlungen entstehen können, die bei der Papierherstellung den Blattbildungsprozess beeinträchtigen.The free passage area of the covering fabric 22, which has already been increased by the resetting of the straight strips 16, can be further increased by means of central recesses 18b in the region of the radially outer edges 18a of the corrugated strips 18 and 18 ', respectively between the covering fabric 22 and the belts supporting it, further passages are generated which allow flow in the circumferential direction of the roller, as was represented by arrows A in FIGS. 2 and 5. At the same time, these recesses 18b further reduce the risk of water accumulation on the radially outer edges of the belts supporting the covering fabric, which can impair the sheet formation process during paper production.

Schliesslich sind die geraden Bänder 16 mit öffnungen 16c versehen, welche insbesondere an das Tragrohr 12 angrenzen und folgendem Zweck dienen: Da das Tragrohr 12 einen an seinem Umfang geschlossenen Walzenkörper bildet, auf den die das Überzugsgewebe 22 tragende Wabenkonstruktion aufgeschrumpft ist, muss für einen Druckausgleich zwischen den zwischen den geraden Bändern 16 liegenden Ringkanälen gesorgt werden - strömt bei der Blattbildung die Fasersuspension die Blattbildungswalze in radialer Richtung von aussen an, muss Luft aus den erwähnten Ringkanälen in Umfangsrichtung der Walze entweichen können; dabei könnten sich ohne die öffnungen 16c Druckunterschiede zwischen den Ringkanälen ausbilden, welche eine gleichmässige Blattbildung verhindern würden.Finally, the straight belts 16 are provided with openings 16c, which in particular adjoin the support tube 12 and serve the following purpose: Since the support tube 12 forms a roller body which is closed on its circumference and onto which the honeycomb structure carrying the cover fabric 22 is shrunk, pressure compensation is necessary between the ring channels lying between the straight belts 16 - if the fiber suspension flows towards the outside in the radial direction during the sheet formation, air must be able to escape from the ring channels mentioned in the circumferential direction of the roller; without the openings 16c, pressure differences could form between the ring channels, which would prevent uniform sheet formation.

Da bei den Ausführungsformen nach den Figuren 1 bis 5 die geraden Bänder 16 das Uberzugsgewebe 22 nicht unmittelbar abstützen, kann für diese Bänder eine grössere Blechstärke gewählt werden. Ausserdem lassen sich mit den Ausführungsformen nach den Figuren 1 bis 5 freie Durchgangsflächen des Uberzugsgewebes 22. schaffen, die bis 93 % der gesamten überzugsgewebefläche betragen können.Since in the embodiments according to FIGS. 1 to 5 the straight strips 16 do not directly support the cover fabric 22, a larger sheet thickness can be selected for these strips. You can also use the embodiments according to FIGS. 1 to 5 create free passage areas of the cover fabric 22, which can amount to 93% of the total cover fabric area.

Die dritte Ausführungsform nach den Figuren 6 bis 8 unterscheidet sich von der Ausführungsform nach den Figuren 1 bis 4 lediglich dadurch, daß die radial äusseren Kanten der geraden Bänder 16" mit den radial äusseren Kanten der gewellten Bänder 18" und der Aussenumfangsfläche der Stirnringe 14 fluchten und daß an die Stelle der Durchlässe 26 Ausnehmungen 18c in den gewellten Bändem 18" im Bereich der Verbindungsstellen 20 vorgesehen worden sind. Die Ausführungsform nach den Figuren 6 bis 8 eignet sich besonders für solche Walzen, bei denen das Überzugsgewebe einer hohen Druckbelastung ausgesetzt ist. Um dennoch die freie Durchgangsfläche des Überzugsgewebes möglichst gross zu machen (sie kann bei dieser Ausführungsform bis zu 90 % der Gesamtfläche des Überzugsgewebes betragen), empfiehlt es sich, die Blechstärke für die geraden Bänder 16" kleiner oder höchstens gleich gross als die Blechstärke der gewellten Bänder 18" zu wählen.The third embodiment according to FIGS. 6 to 8 differs from the embodiment according to FIGS. 1 to 4 only in that the radially outer edges of the straight bands 16 "are aligned with the radially outer edges of the corrugated bands 18" and the outer peripheral surface of the end rings 14 and that in place of the passages 26, recesses 18c have been provided in the corrugated bands 18 "in the region of the connection points 20. The embodiment according to FIGS. 6 to 8 is particularly suitable for rollers in which the covering fabric is exposed to a high pressure load. In order to make the free passage area of the covering fabric as large as possible (in this embodiment it can be up to 90% of the total area of the covering fabric), it is advisable to make the sheet thickness for the straight strips 16 "smaller or at most the same as the sheet thickness of the corrugated Tapes 18 "to choose.

Ebenso wie bei der Walze nach der DE-AS 21 48 361 könnten die in axialer Richtung aufeinanderfolgenden geraden und gewellten Bandabschnitte aber auch von jeweils einem oder mehreren geraden bzw. gewellten Band gebildet werden, welches schraubenlinienförmig um das Tragrohr 12 herumverläuft.Just as with the roller according to DE-AS 21 48 361, the straight and corrugated belt sections which follow one another in the axial direction could also be formed by one or more straight or corrugated belt, which extends helically around the support tube 12.

Claims (5)

1. Walze (10) für Maschinen der Papierindustrie oder dergleichen mit einem Tragrohr (12), auf dem mehrere, mindestens ungefähr in Umfangsrichtung verlaufende und in radialer Richtung hochkantstehende Bänder (16, 18) befestigt sind, wobei in axialer Richtung gerade und gewellte Bandabschnitte (16 bzw. 18) aufeinanderfolgen und die geraden Bandabschnitte (16) an Verbindungsstellen (20) durch die gewellten Bandabschnitte (18) miteinander verbunden sind, welch letztere an ihrer radial äusseren Kante (18a) Ausnehmungen (18b, 18c) aufweisen, sowie mit einem den Walzenumfang bildenden und sich mindestens auf den gewellten Bandabschnitten (18) abstützenden Uberzugsgewebe (22), zwischen dem und den Bändern (16, 18) an deren Verbindungsstellen (20) im Bereich der radial äusseren Kante (18a) der gewellten Bandabschnitte (18) einen Durchfluss in Umfangsrichtung zulassende Durchlässe (26) vorgesehen sind, dadurch gekennzeichnet, daß die gewellten Bandabschnitte (18) ungefähr in der Mitte zwischen den Verbindungsstellen (20) an ihrer radial äusseren Kante (18a) zusätzliche Ausnehmungen (18b) aufweisen, und daß das Überzugsgewebe (22) unmittelbar zumindest auf den gewellten Bandabschnitten (18) aufliegt.1. roller (10) for machines of the paper industry or the like with a support tube (12) on which several, at least approximately in the circumferential direction and in the radial direction upright tapes (16, 18) are fastened, with straight and corrugated tape sections in the axial direction (16 or 18) follow one another and the straight band sections (16) are connected to one another at connecting points (20) by the corrugated band sections (18), the latter having recesses (18b, 18c) on their radially outer edge (18a), and also with a covering fabric (22) forming the circumference of the roller and supported at least on the corrugated belt sections (18), between the and the belts (16, 18) at their connection points (20) in the region of the radially outer edge (18a) of the corrugated belt sections (18 ) passages (26) allowing a flow in the circumferential direction are provided, characterized in that the corrugated band sections (18) approximately in the middle between d Connection points (20) have additional recesses (18b) on their radially outer edge (18a), and that the covering fabric (22) lies directly at least on the corrugated band sections (18). 2. Walze nach Anspruch 1, dadurch gekennzeichnet, daß die gewellten Bandabschnitte (18) die geraden Bandabschnitte (16) in radialer Richtung überragen.2. Roller according to claim 1, characterized in that the corrugated belt sections (18) project beyond the straight belt sections (16) in the radial direction. 3. Walze nach Anspruch 1, dadurch gekennzeichnet, daß die gewellten und die geraden Bandabschnitte (18" bzw. 16") denselben Aussendurchmesser aufweisen und die gewellten und/oder die geraden Bandabschnitte an den Verbindungsstellen (20) an ihrer radial äusseren Kante Ausnehmungen (18c) aufweisen.3. Roller according to claim 1, characterized in that the corrugated and the straight belt sections (18 "or 16") have the same outside diameter and the corrugated and / or the straight belt sections at the connection points (20) on their radially outer edge recesses ( 18c). 4. Walze nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die geraden Bandabschnitte (16) über die gewellten Bandabschnitte (18) in radialer Richtung nach innen überstehen und auf dem Tragrohr (12) aufsitzen sowie an ihrer radial inneren Kante Ausnehmungen (16c) aufweisen.4. Roller according to one or more of the preceding claims, characterized in that the straight band sections (16) project beyond the corrugated band sections (18) in the radial direction inwards and sit on the support tube (12) and have recesses (on their radially inner edge) 16c). 5. Walze nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß einander benachbarte gewellte Bandabschnitte (18') in .Umfangsrichtung um eine halbe Wellenlänge gegeneinander versetzt sind.5. Roller according to one or more of the preceding claims, characterized in that mutually adjacent corrugated belt sections (18 ') are offset in the circumferential direction by half a wavelength.
EP84111680A 1984-09-29 1984-09-29 Roll for machines for the paper industry or the like Expired EP0176610B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT84111680T ATE36363T1 (en) 1984-09-29 1984-09-29 ROLLER FOR MACHINERY IN THE PAPER INDUSTRY OR SIMILAR.
DE8484111680T DE3473312D1 (en) 1984-09-29 1984-09-29 Roll for machines for the paper industry or the like
EP84111680A EP0176610B1 (en) 1984-09-29 1984-09-29 Roll for machines for the paper industry or the like
US06/773,361 US4619737A (en) 1984-09-29 1985-09-06 Roller for machines in the paper-making industry
CA000491354A CA1251081A (en) 1984-09-29 1985-09-23 Roller for machines in the paper-making industry or similar
JP60212708A JPS6184411A (en) 1984-09-29 1985-09-27 Roller for machine of paper industry, etc.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84111680A EP0176610B1 (en) 1984-09-29 1984-09-29 Roll for machines for the paper industry or the like

Publications (2)

Publication Number Publication Date
EP0176610A1 true EP0176610A1 (en) 1986-04-09
EP0176610B1 EP0176610B1 (en) 1988-08-10

Family

ID=8192188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111680A Expired EP0176610B1 (en) 1984-09-29 1984-09-29 Roll for machines for the paper industry or the like

Country Status (6)

Country Link
US (1) US4619737A (en)
EP (1) EP0176610B1 (en)
JP (1) JPS6184411A (en)
AT (1) ATE36363T1 (en)
CA (1) CA1251081A (en)
DE (1) DE3473312D1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0674927B2 (en) * 1985-04-08 1994-09-21 大阪瓦斯株式会社 Ceiling-hung far infrared heater
JP2583042B2 (en) * 1986-12-27 1997-02-19 日立マクセル株式会社 Elastic roll for calendar processing
US4957630A (en) * 1988-12-27 1990-09-18 Bratten Jack R Drum filter with divergent hole perforated filter media
DE4018890A1 (en) * 1990-06-13 1991-12-19 Emil Holz ROLLER FOR PAPER MACHINES
JP3160397B2 (en) * 1991-11-08 2001-04-25 ヨット・エム・フォイト・ゲーエムベーハー Roll with separate skin and roll core
FI105934B (en) 1994-06-17 2000-10-31 Valmet Paper Machinery Inc Entrance to a double-wire zone in a hybrid machine of a paper machine
US5480545A (en) * 1994-08-03 1996-01-02 Ingersoll-Rand Company Cross braced vacuum washer
US6105788A (en) * 1997-11-12 2000-08-22 Thermo Black Clawson Inc. Composite screen
DE10106731A1 (en) * 2001-02-14 2002-08-22 Voith Paper Patent Gmbh Twin-wire former for the production of a fibrous web from a fibrous suspension
SE532437C2 (en) * 2007-09-19 2010-01-19 Andritz Oy Drainage drum for dewatering cellulose pulp
WO2010018120A2 (en) * 2008-08-11 2010-02-18 Voith Patent Gmbh Fractionating arrangement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2240869A (en) * 1939-04-17 1941-05-06 Encor Corp Wire faced roll for papermaking machines
FR2155344A5 (en) * 1971-09-28 1973-05-18 Finckh Metalltuch Maschf
FR2399504A1 (en) * 1977-08-02 1979-03-02 Ingersoll Rand Co PAPER DRYER CYLINDER
DE3210320A1 (en) * 1982-03-20 1983-09-29 J.M. Voith Gmbh, 7920 Heidenheim Suction roll, in particular for twin-wire paper machines
GB2123862A (en) * 1982-07-21 1984-02-08 Finckh Maschf Machine for making paper or board
GB2123863A (en) * 1982-07-21 1984-02-08 Finckh Maschf Dandy-roll assembly for top- draining a wet web on a fourdrinier machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564686A (en) * 1968-03-01 1971-02-23 Metal Tech Inc Helical pattern,bent node honeycomb roll
US3590453A (en) * 1968-06-19 1971-07-06 Metal Tech Inc Honeycomb roll
DE2646116C3 (en) * 1976-10-13 1979-10-18 Hermann Finckh, Maschinenfabrik, 7417 Pfullingen Suction roll for paper machines
US4050131A (en) * 1976-12-06 1977-09-27 Honeycomb Systems, Inc. Roll with inner and outer, spaced axially extending triangular mesh strips

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2240869A (en) * 1939-04-17 1941-05-06 Encor Corp Wire faced roll for papermaking machines
FR2155344A5 (en) * 1971-09-28 1973-05-18 Finckh Metalltuch Maschf
FR2399504A1 (en) * 1977-08-02 1979-03-02 Ingersoll Rand Co PAPER DRYER CYLINDER
DE3210320A1 (en) * 1982-03-20 1983-09-29 J.M. Voith Gmbh, 7920 Heidenheim Suction roll, in particular for twin-wire paper machines
GB2123862A (en) * 1982-07-21 1984-02-08 Finckh Maschf Machine for making paper or board
GB2123863A (en) * 1982-07-21 1984-02-08 Finckh Maschf Dandy-roll assembly for top- draining a wet web on a fourdrinier machine

Also Published As

Publication number Publication date
DE3473312D1 (en) 1988-09-15
ATE36363T1 (en) 1988-08-15
JPS6184411A (en) 1986-04-30
EP0176610B1 (en) 1988-08-10
JPH034675B2 (en) 1991-01-23
CA1251081A (en) 1989-03-14
US4619737A (en) 1986-10-28

Similar Documents

Publication Publication Date Title
DE1510359C3 (en) Roller for dewatering fiber suspensions
EP0176610B1 (en) Roll for machines for the paper industry or the like
DE2253947A1 (en) DRUM
DE2342422A1 (en) GRID CONSTRUCTION WITH CORRUGATED STRIPES
DE3217579A1 (en) ROLLER
DE2904858C2 (en) Filter insert for liquids
DE2126080A1 (en) Separation element for filter and separation devices
EP0141141B2 (en) Adjustable bending roll
DE4411620C2 (en) Press jacket and method for producing a press jacket
DE4431648C1 (en) Roller pressing start and end of two rolls of material together
DE2905548A1 (en) Ribbing roller - has elastic rings with axial ribs prestressed into annular grooves between plain metal surfaces
DE3210320C2 (en) Suction roll for paper machines
DE3545270C1 (en) Spreader
DE3311822C2 (en) Device for damping pressure pulsations for paper machines
DE1118758B (en) Liquid filter with cylindrical filter insert
EP0385208B1 (en) Apparatus for forcing a treating material through a textile material
DE2108464C2 (en) Device for separating or separating solid particles from a liquid
DE10206568A1 (en) Roller for guiding sheet material
EP0059837A1 (en) Scraping or squeezing rollers for removing liquids from textile webs
EP0218194A2 (en) Press roller apparatus, in particular for the high-pressure area in band filter presses
DE3311853A1 (en) AIR SPRING
EP0462434A1 (en) Roll for paper machines
DE2115156A1 (en) Rollers, in particular suction rolls for paper machines
DE2300553C3 (en) Screen cylinder
DE3338965A1 (en) Device for stretching and/or stroking a moving web

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

RBV Designated contracting states (corrected)

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

17P Request for examination filed

Effective date: 19860516

17Q First examination report despatched

Effective date: 19870915

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 36363

Country of ref document: AT

Date of ref document: 19880815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3473312

Country of ref document: DE

Date of ref document: 19880915

ITF It: translation for a ep patent filed
ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed
ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 84111680.9

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: SE

Payment date: 20020909

Year of fee payment: 19

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

Ref country code: AT

Payment date: 20020912

Year of fee payment: 19

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

Ref country code: GB

Payment date: 20020925

Year of fee payment: 19

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

Ref country code: FR

Payment date: 20020927

Year of fee payment: 19

Ref country code: DE

Payment date: 20020927

Year of fee payment: 19

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

Ref country code: GB

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

Effective date: 20030929

Ref country code: AT

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

Effective date: 20030929

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

Ref country code: SE

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

Effective date: 20030930

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

Ref country code: DE

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

Effective date: 20040401

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030929

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

Ref country code: FR

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

Effective date: 20040528

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST