EP0953678B1 - Press blanket - Google Patents

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Publication number
EP0953678B1
EP0953678B1 EP99104438A EP99104438A EP0953678B1 EP 0953678 B1 EP0953678 B1 EP 0953678B1 EP 99104438 A EP99104438 A EP 99104438A EP 99104438 A EP99104438 A EP 99104438A EP 0953678 B1 EP0953678 B1 EP 0953678B1
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EP
European Patent Office
Prior art keywords
groove
edge
measured
edge length
chamfer
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EP99104438A
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German (de)
French (fr)
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EP0953678A2 (en
EP0953678B2 (en
EP0953678A3 (en
Inventor
Uwe Matuschczyk
Endters Andreas
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Voith Patent GmbH
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Voith Paper Patent GmbH
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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/0209Wet presses with extended press nip
    • D21F3/0218Shoe presses
    • D21F3/0227Belts or sleeves therefor
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/08Pressure rolls
    • D21F3/083Pressure rolls perforated
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/08Pressure rolls
    • D21F3/086Pressure rolls having a grooved surface
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S462/00Books, strips, and leaves for manifolding
    • Y10S462/90Adhesive
    • Y10S462/901Pressure sensitive
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628Nonplanar uniform thickness material
    • Y10T428/24669Aligned or parallel nonplanarities
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628Nonplanar uniform thickness material
    • Y10T428/24669Aligned or parallel nonplanarities
    • Y10T428/24694Parallel corrugations

Definitions

  • the invention relates to a press cover for a pressing device for treatment a material web such as in particular a paper or board web in a press nip, according to the preamble of claim 1.
  • a press cover is made for example Document EP-A-0241389.
  • Such jackets are used, for example, for pressing devices, in which a rotating around a rigid support more flexible Preßmantel is pressed against a particular rigid counter-surface.
  • a web By the formed between the flexible press cover and the counter surface Press nip is guided a web, which in particular to act as a paper or board web. Because of the flexibility the Preßmantels this can in particular also in an extended nip press be used as a coat of a shoe press unit.
  • compression jackets are partially with grooves or blind holes, with which an additional, during the runtime as constant as possible water storage volume can be achieved should.
  • the groove width is usually in a range of 0.5 to 1.5 mm, wherein the preferred groove width is 1.0 mm.
  • the depth of the parallel Side walls of such grooves are usually in one area from 0.5 to 2.0 mm, the preferred depth being 1.0 mm.
  • Partially the grooves are also conical at an angle of 5 to 15 °.
  • Such a press cover is known, for example, from US Pat. No. 5,543,015.
  • the blind holes usually have a diameter in the Range from 1.6 to 2.8mm, with the preferred diameter being 2.2mm is.
  • Such blind holes usually have a depth in the range 1.5 to 2.5 mm, the preferred depth being 2.0 mm. there These blind holes are usually cylindrical.
  • the aim of the invention is to provide a press cover of the type mentioned create, despite the relatively high pressing loads and despite the Flow properties of the commonly used elastomeric materials the maintenance of the largest possible storage volume guaranteed.
  • Edge length of the chamfer preferably about 1 to 3 times and preferably about 2 times the lengthwise cross machine direction measured edge length.
  • the measured edge length in the longitudinal direction in particular, the chamfer can range from about 0.1 mm to 0.3 mm and preferably be about 0.2 mm.
  • Corresponding dimensions are also in a corresponding a curve line extending rounding provided. In this case, these dimensions are on one of the rounding section applied tangent.
  • the in Direction of the groove or bore depth preferably with respect to a the rounding section applied tangent measured edge length of Rounding about about 1 to 3 times and preferably 2 times in the longitudinal direction, preferably measured with respect to the tangent Edge length.
  • the rounding portion in the longitudinal direction, preferably with respect to the edge length measured at the rounding section the rounding portion in a range of about 0.1 mm to about 0.3 mm and preferably about 0.2 mm.
  • the edge length measured in the direction of the groove or bore depth can also be dimensioned in this way be that between the bottom of a respective groove or blind hole and the chamfer or the rounding section a cylindrical Wall section remains.
  • the rounding section can run according to a curved line, the at least substantially, for example, a circular arc or a Involute corresponds.
  • Preßmantels is the chamfer or the rounding section directly formed on the outer edge of a respective groove or blind bore.
  • the chamfer or the rounding section with respect to the outer edge of a respective groove or Blind hole in the direction of the groove or bore depth offset inwards and be formed at a distance from this.
  • a groove are preferably at least in the circumferential direction the Preßmantels extending side walls of the groove each with a Bevel or a rounding section provided.
  • the side wall of a respective blind bore is preferably with a extending over the entire inner circumference extending annular bevel or rounding section provided.
  • FIG. 1 to 4 is a schematic, partial sectional view in each case a press cover 10 is shown, which is for a pressing device for treatment a web in a press nip is usable.
  • a press cover 10 is shown, which is for a pressing device for treatment a web in a press nip is usable.
  • Material web may be in particular a paper or board web act.
  • the side walls 18 of these grooves 14 are each provided with a chamfer 20, to counteract a volume reduction occurring during pressing load.
  • chamfers 20 shown in solid lines respectively also a rounding section corresponding to a curved line 20 'may be provided.
  • the edge length y measured in the direction of the groove or bore depth (see Figures 1 to 3) of a respective chamfer 20 is in the illustrated Embodiments about 1 to 3 times and preferably approximately twice the edge length x measured in the longitudinal direction (cf. FIGS. 1 to 3).
  • the edge length x measured in the longitudinal direction of a respective one Chamfer is suitably in a range of about 0.1 mm to about 0.3 mm, preferably about 0.2 mm.
  • the rounding sections 20 ' which are optionally provided instead of the chamfers 20 may conveniently have comparable edge lengths x and y, these preferably with respect to one of the respective Rounding portion 20 'applied tangent be measured in the Level of each replaced chamfer 20 can run (see Figures 1 and 2).
  • a Preßmantels 10 is in the direction of the groove or bore depth measured edge length y (see Figures 1 to 3) of a respective chamfer 20th or a respective rounding section 20 'so dimensioned that between the bottom 22 of a respective groove 14 and a respective blind bore 16 and the chamfer 20 and the rounding portion 20 'is a cylindrical Wall section 24 remains.
  • the dashed lines in Figures 1 and 2 indicated rounding 20 ' may in particular be corresponding to a curved line, the For example, at least approximately a circular arc or at least in essentially corresponds to an involute.
  • FIG. 1 and 2 are the Chamfers 20 and the rounding sections 20 'directly at the opening area limiting outer edge of the respective groove 14 (see FIG 1) or blind bore 16 (see FIG. In the present case is the measured in the direction of the groove or hole depth edge length y a respective bevel 20 and a respective rounding portion 20 'something greater than the depth of the adjoining the bottom 22 cylindrical Wall section 24.
  • each of the two is in the circumferential direction the press jacket extending side walls 18 of the respective groove 14 respectively provided with a chamfer 20 and a rounding portion 20 '.

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  • Paper (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Finger-Pressure Massage (AREA)

Abstract

A new press mantle of a roller for water extraction from a wet fiber web, of paper or cardboard, has grooves (14) or blind drillings at the roller mantle surface (12). The side walls (18) are chamfered (20) and/or rounded (20') on a curved line at the opening, to prevent compression of the opening when the mantle is under pressure. The chamfer (20) edge length (y), towards the depth of the groove/drilling, is 1-3 times and preferably twice the edge length (x) along the longitudinal direction. The chamfer edge length on the longitudinal line (x) is 0.1-0.3 mm, especially 0.2 mm. With a rounded opening edge (20'), the length (y) of the edge in relation to a tangent is 1-3 times, preferably twice the edge length (x) along the longitudinal line which is 0.1-0.3 mm and preferably 0.2 mm. The chamfered/rounded edge (20,20') length (y) towards the depth of the groove/drilling is set to give a cylindrical wall section (24) between the base (22) of the groove (14) or drilling and the start of the chamfered/rounded edge. The curvature of the rounded edge (20') follows a circular arc or an involute. The chamfered/rounded edge (20,20') is at the outer edge of each groove (14) or blind drilling, or it is offset inwards towards the depth by a given gap from the mantle surface as a ring step.

Description

Die Erfindung betrifft einen Preßmantel für eine Preßvorrichtung zur Behandlung einer Materialbahn wie insbesondere einer Papier- oder Kartonbahn in einem Preßspalt, gemäß dem Oberbegriff des Anspruchs 1. Ein solcher Preßmantel ist beispielsweise aus Dokument EP-A-0241389 bekannt.The invention relates to a press cover for a pressing device for treatment a material web such as in particular a paper or board web in a press nip, according to the preamble of claim 1. Such a press cover is made for example Document EP-A-0241389.

Derartige Preßmäntel werden beispielsweise für Preßvorrichtungen verwendet, in denen ein um einen starren Träger umlaufender flexibler Preßmantel gegen eine insbesondere starre Gegenfläche gepreßt wird. Durch den zwischen dem flexiblen Preßmantel und der Gegenfläche gebildeten Preßspalt wird eine Materialbahn geführt, bei der es sich insbesondere um eine Papier- oder Kartonbahn handeln kann. Aufgrund der Flexibilität des Preßmantels kann dieser insbesondere auch in einer Langspaltpresse als Mantel einer Schuhpreßeinheit verwendet werden.Such jackets are used, for example, for pressing devices, in which a rotating around a rigid support more flexible Preßmantel is pressed against a particular rigid counter-surface. By the formed between the flexible press cover and the counter surface Press nip is guided a web, which in particular to act as a paper or board web. Because of the flexibility the Preßmantels this can in particular also in an extended nip press be used as a coat of a shoe press unit.

Zur Reduzierung des hydraulischen Drucks im Preßspalt sowie zur Verbesserung der Entwässerungsarbeit werden Preßmäntel teilweise mit Rillen oder Blindbohrungen versehen, mit denen ein zusätzliches, während der Laufzeit möglichst konstantes Wasserspeichervolumen erreicht werden soll. Die Rillenbreite liegt üblicherweise in einem Bereich von 0,5 bis 1,5 mm, wobei die bevorzugte Rillenbreite 1,0 mm beträgt. Die Tiefe der parallelen Seitenwände solcher Rillen liegt üblicherweise in einem Bereich von 0,5 bis 2,0 mm, wobei die bevorzugte Tiefe 1,0 mm beträgt. Teilweise sind die Rillen auch in einem Winkel von 5 bis 15° konisch ausgebildet. Ein solcher Preßmantel ist beispielsweise aus der US-A 5 543 015 bekannt. Die Blindbohrungen besitzen üblicherweise einen Durchmesser im Bereich von 1,6 bis 2,8 mm, wobei der bevorzugte Durchmesser 2,2 mm beträgt. Solche Blindbohrungen besitzen üblicherweise eine Tiefe im Bereich 1,5 bis 2,5 mm, wobei die bevorzugte Tiefe 2,0 mm beträgt. Dabei sind diese Blindbohrungen in der Regel zylindrisch ausgeführt.To reduce the hydraulic pressure in the nip and to improve The dehydration work, compression jackets are partially with grooves or blind holes, with which an additional, during the runtime as constant as possible water storage volume can be achieved should. The groove width is usually in a range of 0.5 to 1.5 mm, wherein the preferred groove width is 1.0 mm. The depth of the parallel Side walls of such grooves are usually in one area from 0.5 to 2.0 mm, the preferred depth being 1.0 mm. Partially the grooves are also conical at an angle of 5 to 15 °. Such a press cover is known, for example, from US Pat. No. 5,543,015. The blind holes usually have a diameter in the Range from 1.6 to 2.8mm, with the preferred diameter being 2.2mm is. Such blind holes usually have a depth in the range 1.5 to 2.5 mm, the preferred depth being 2.0 mm. there These blind holes are usually cylindrical.

Aufgrund der hohen Beanspruchung im Preßspalt sowie infolge der . Fließeigenschaften der für solche Preßmäntel in der Regel verwendeten elastomeren Materialien werden die Rillen bzw. Blindbohrungen während des Betriebs "zugedrückt", wobei insbesondere im Öffnungsbereich eine Querschnittsverengung auftritt. Dadurch wird nun aber das sich im Betrieb ergebende Speichervolumen gegenüber dem ursprünglichen, im Neuzustand sowie bei fehlender Belastung gegebenen Speichervolumen teilweise erheblich reduziert. Der mit den Rillen bzw. Blindbohrungen angestrebte eigentliche Vorteil einer erhöhten Entwässerungsleistung im Preßspalt durch das zusätzliche Speichervolumen wird demzufolge zumindest teilweise wieder zunichte gemacht. In der Praxis hat sich insbesondere auch gezeigt, daß die in einem Winkel von 5 bis 15° konisch verlaufenden Rillen des aus der US-A-5 543 015 bekannten Preßmantels zumindest insoweit praktisch keine Verbesserungen mit sich bringen.Due to the high stress in the press nip and as a result of , Flow properties of those used for such press jackets in the rule elastomeric materials, the grooves or blind holes during the operation "pressed", in particular in the opening area a Cross-sectional narrowing occurs. As a result, but now that is in operation resulting storage volume compared to the original, when new as well as given given lack of load storage volume partially considerably reduced. The goal with the grooves or blind holes actual advantage of increased drainage performance in the nip as a result of the additional storage volume, at least partly nullified. In practice, in particular also shown that at an angle of 5 to 15 ° tapered Grooving of the press cover known from US Pat. No. 5,543,015 at least insofar bring practically no improvements.

Ziel der Erfindung ist es, einen Preßmantel der eingangs genannten Art zu schaffen, der trotz der relativ hohen Preßbelastungen sowie trotz der Fließeigenschaften der üblicherweise verwendeten elastomeren Materialien die Aufrechterhaltung eines möglichst großen Speichervolumens gewährleistet. The aim of the invention is to provide a press cover of the type mentioned create, despite the relatively high pressing loads and despite the Flow properties of the commonly used elastomeric materials the maintenance of the largest possible storage volume guaranteed.

Die Aufgabe wird nach der Erfindung durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst.The object is achieved according to the invention by the features of the characterizing part of claim 1.

Demzufolge wird einer bei einer jeweiligen Preßbelastung auftretenden Volumenverringerung dadurch entgegengewirkt, daß im kritischen Öffnungsbereich einer jeweiligen Rille bzw. Bohrung eine Fase bzw. ein entsprechend einer Kurvenlinie verlaufender Rundungsabschnitt vorgesehen ist, die bzw. der das "Zudrücken" der Rillen bzw. Blindbohrungen ganz oder zumindest teilweise kompensiert. Die hierzu in den Ansprüchen angegebene Form und Gestaltung der Rillen ist auf den Neuzustand eines betreffenden Preßmantels bezogen.Accordingly, one occurring at a respective pressing load Volume reduction counteracted by that in the critical opening area a respective groove or bore a chamfer or a corresponding a curve line extending rounding provided is, the or the "squeezing" of the grooves or blind holes completely or at least partially compensated. The purpose specified in the claims Shape and design of the grooves is on the new condition of a related Preßmantels.

Dabei beträgt die in Richtung der Rillen- bzw. Bohrungstiefe gemessene Kantenlänge der Fase vorzugsweise etwa das 1 - bis 3-fache und vorzugsweise etwa das 2-fache der in Längsrichtung quer zur Maschinenrichtung gemessenen Kantenlänge. Die in Längsrichtung gemessene Kantenlänge der Fase kann insbesondere in einem Bereich von etwa 0,1 mm bis 0,3 mm liegen und vorzugsweise etwa 0,2 mm betragen.In this case, the measured in the direction of the groove or bore depth Edge length of the chamfer preferably about 1 to 3 times and preferably about 2 times the lengthwise cross machine direction measured edge length. The measured edge length in the longitudinal direction in particular, the chamfer can range from about 0.1 mm to 0.3 mm and preferably be about 0.2 mm.

Entsprechende Abmessungen sind auch bei einem entsprechend einer Kurvenlinie verlaufenden Rundungsabschnitt vorgesehen. In diesem Fall sind diese Abmessungen auf eine an den Rundungsabschnitt angelegte Tangente bezogen. Corresponding dimensions are also in a corresponding a curve line extending rounding provided. In In this case, these dimensions are on one of the rounding section applied tangent.

Entsprechend beträgt bei einer zweckmäßigen Ausführungsform die in Richtung der Rillen- bzw. Bohrungstiefe vorzugsweise in bezug auf eine an den Rundungsabschnitt angelegte Tangente gemessene Kantenlänge des Rundungsabschnitts etwa das 1- bis 3-fache und vorzugsweise das 2-fach der in Längsrichtung vorzugsweise in bezug auf die Tangente gemessenen Kantenlänge. Zudem kann die in Längsrichtung vorzugsweise in bezug auf die an den Rundungsabschnitt angelegte Tangente gemessene Kantenlänge des Rundungsabschnitts in einem Bereich von etwa 0,1 mm bis etwa 0,3 mm liegen und vorzugsweise etwa 0,2 mm betragen.Accordingly, in an expedient embodiment, the in Direction of the groove or bore depth, preferably with respect to a the rounding section applied tangent measured edge length of Rounding about about 1 to 3 times and preferably 2 times in the longitudinal direction, preferably measured with respect to the tangent Edge length. In addition, in the longitudinal direction, preferably with respect to the edge length measured at the rounding section the rounding portion in a range of about 0.1 mm to about 0.3 mm and preferably about 0.2 mm.

Die in Richtung der Rillen- bzw. Bohrungstiefe gemessene Kantenlänge der Fase bzw. des Rundungsabschnitts kann insbesondere auch so bemessen sein, daß zwischen dem Boden einer jeweiligen Rille bzw. Blindbohrung und der Fase bzw. dem Rundungsabschnitt ein zylindrischer Wandabschnitt verbleibt.The edge length measured in the direction of the groove or bore depth The chamfer or the rounding section can also be dimensioned in this way be that between the bottom of a respective groove or blind hole and the chamfer or the rounding section a cylindrical Wall section remains.

Der Rundungsabschnitt kann entsprechend einer Kurvenlinie verlaufen, die zumindest im wesentlichen beispielsweise einem Kreisbogen oder einer Evolvente entspricht.The rounding section can run according to a curved line, the at least substantially, for example, a circular arc or a Involute corresponds.

Bei einer zweckmäßigen praktischen Ausführungsform des erfindungsgemäßen Preßmantels ist die Fase bzw. der Rundungsabschnitt unmittelbar am äußeren Rand einer jeweiligen Rille bzw. Blindbohrung ausgebildet.In a convenient practical embodiment of the invention Preßmantels is the chamfer or the rounding section directly formed on the outer edge of a respective groove or blind bore.

Gemäß einer alternativen Ausführungsform kann die Fase bzw. der Rundungsabschnitt bezüglich des äußeren Randes einer jeweiligen Rille bzw. Blindbohrung in Richtung der Rillen- bzw. Bohrungstiefe nach innen versetzt und im Abstand von diesem ausgebildet sein. According to an alternative embodiment, the chamfer or the rounding section with respect to the outer edge of a respective groove or Blind hole in the direction of the groove or bore depth offset inwards and be formed at a distance from this.

Im Fall einer Rille sind vorzugsweise zumindest die sich in Umfangsrichtung des Preßmantels erstreckenden Seitenwände der Rille jeweils mit einer Fase bzw. einem Rundungsabschnitt versehen.In the case of a groove are preferably at least in the circumferential direction the Preßmantels extending side walls of the groove each with a Bevel or a rounding section provided.

Die Seitenwand einer jeweiligen Blindbohrung ist vorzugsweise mit einer sich über deren gesamten Innenumfang erstreckenden ringartigen Fase bzw. Rundungsabschnitt versehen.The side wall of a respective blind bore is preferably with a extending over the entire inner circumference extending annular bevel or rounding section provided.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung näher erläutert; in dieser zeigen:

Figur 1
eine schematische, geschnittene Teildarstellung einer ersten Ausführungsform eines Preßmantels, in der eine Rille zu erkennen ist, die am äußeren Rand mit zwei einander gegenüberliegenden Fasen versehen ist,
Figur 2
eine schematische, geschnittene Teildarstellung einer weiteren Ausführungsform eines Preßmantels, in der eine Blindbohrung zu erkennen ist, die am äußeren Rand mit einer umlaufenden Fase versehen ist,
Figur 3
eine schematische, geschnittene Teildarstellung einer weiteren Ausführungsform eines Preßmantels, in der eine Rille zu erkennen ist, deren Fasen bezüglich des äußeren Randes nach innen versetzt sind, und
Figur 4
eine schematische, geschnittene Teildarstellung einer weiteren Ausführungsform eines Preßmantels, in der eine Blindbohrung zu erkennen ist, deren Fase bezüglich des äußeren Randes nach innen versetzt ist.
The invention is explained in more detail below with reference to embodiments with reference to the drawing; in this show:
FIG. 1
a schematic, partial sectional view of a first embodiment of a press cover, in which a groove can be seen, which is provided at the outer edge with two opposite chamfers,
FIG. 2
a schematic, partial sectional view of another embodiment of a press cover, in which a blind bore can be seen, which is provided at the outer edge with a circumferential chamfer,
FIG. 3
a schematic, partial sectional view of another embodiment of a press cover, in which a groove is to be seen, the chamfers are offset with respect to the outer edge inwardly, and
FIG. 4
a schematic, partial sectional view of another embodiment of a press cover, in which a blind bore can be seen, the bevel is offset inwardly with respect to the outer edge.

In den Figuren 1 bis 4 ist in schematischer, geschnittener Teildarstellung jeweils ein Preßmantel 10 gezeigt, der für eine Preßvorrichtung zur Behandlung einer Materialbahn in einem Preßspalt verwendbar ist. Bei der Materialbahn kann es sich insbesondere um eine Papier- oder Kartonbahn handeln.In the figures 1 to 4 is a schematic, partial sectional view in each case a press cover 10 is shown, which is for a pressing device for treatment a web in a press nip is usable. In the Material web may be in particular a paper or board web act.

In der äußeren Mantelfläche 12 ist jeweils eine Vielzahl von Rillen 14 und/oder Blindbohrungen 16 vorgesehen.In the outer circumferential surface 12 each have a plurality of grooves 14th and / or blind holes 16 are provided.

Die Seitenwände 18 dieser Rillen 14 (vgl. Figuren 1 und 3) und Blindbohrungen 16 (vgl. Figuren 2 und 4) sind jeweils mit einer Fase 20 versehen, um einer bei Preßbelastung auftretenden Volumenverringerung entgegenzuwirken.The side walls 18 of these grooves 14 (see Figures 1 and 3) and blind holes 16 (see Figures 2 and 4) are each provided with a chamfer 20, to counteract a volume reduction occurring during pressing load.

Anstelle der in durchgezogenen Linien dargestellten Fasen 20 kann jeweils auch ein entsprechend einer Kurvenlinie verlaufender Rundungsabschnitt 20' vorgesehen sein. Solche Rundungsabschnitte 20' sind in den Figuren lund 2 gestrichelt dargestellt.Instead of the chamfers 20 shown in solid lines, respectively also a rounding section corresponding to a curved line 20 'may be provided. Such rounding sections 20 'are in the figures Lund 2 shown in broken lines.

Die in Richtung der Rillen- bzw. Bohrungstiefe gemessene Kantenlänge y (vgl. die Figuren 1 bis 3) einer jeweiligen Fase 20 beträgt bei den dargestellten Ausführungsbeispielen etwa das 1- bis-3-fache und vorzugsweise etwa das 2-fache der in Längsrichtung gemessenen Kantenlänge x (vgl. die Figuren 1 bis 3). Die in Längsrichtung gemessene Kantenlänge x einer jeweiligen Fase liegt zweckmäßigerweise in einem Bereich von etwa 0,1 mm bis etwa 0,3 mm, wobei sie vorzugsweise etwa 0,2 mm beträgt.The edge length y measured in the direction of the groove or bore depth (see Figures 1 to 3) of a respective chamfer 20 is in the illustrated Embodiments about 1 to 3 times and preferably approximately twice the edge length x measured in the longitudinal direction (cf. FIGS. 1 to 3). The edge length x measured in the longitudinal direction of a respective one Chamfer is suitably in a range of about 0.1 mm to about 0.3 mm, preferably about 0.2 mm.

Die Rundungsabschnitte 20', die wahlweise anstelle der Fasen 20 vorgesehen sein können, besitzen zweckmäßigerweise vergleichbare Kantenlängen x und y, wobei diese vorzugsweise in bezug auf eine an den jeweiligen Rundungsabschnitt 20' angelegte Tangente gemessen werden, die in der Ebene der jeweils ersetzten Fase 20 verlaufen kann (vgl. die Figuren 1 und 2).The rounding sections 20 ', which are optionally provided instead of the chamfers 20 may conveniently have comparable edge lengths x and y, these preferably with respect to one of the respective Rounding portion 20 'applied tangent be measured in the Level of each replaced chamfer 20 can run (see Figures 1 and 2).

Bei sämtlichen in den Figuren 1 bis 4 dargestellten Ausführungsbeispielen eines Preßmantels 10 ist die in Richtung der Rillen- bzw. Bohrungstiefe gemessene Kantenlänge y (vgl. die Figuren 1 bis 3) einer jeweiligen Fase 20 bzw. eines jeweiligen Rundungsabschnitts 20' so bemessen, daß zwischen dem Boden 22 einer jeweiligen Rille 14 bzw. einer jeweiligen Blindbohrung 16 und der Fase 20 bzw. dem Rundungsabschnitt 20' ein zylindrischer Wandabschnitt 24 verbleibt.In all embodiments shown in Figures 1 to 4 a Preßmantels 10 is in the direction of the groove or bore depth measured edge length y (see Figures 1 to 3) of a respective chamfer 20th or a respective rounding section 20 'so dimensioned that between the bottom 22 of a respective groove 14 and a respective blind bore 16 and the chamfer 20 and the rounding portion 20 'is a cylindrical Wall section 24 remains.

Die in den Figuren 1 und 2 gestrichelt angedeuteten Rundungsabschnitte 20' können insbesondere entsprechend einer Kurvenlinie verlaufen, die beispielsweise zumindest angenähert einem Kreisbogen oder zumindest im wesentlichen einer Evolvente entspricht.The dashed lines in Figures 1 and 2 indicated rounding 20 'may in particular be corresponding to a curved line, the For example, at least approximately a circular arc or at least in essentially corresponds to an involute.

Bei den in den Figuren 1 und 2 dargestellten Ausführungsformen sind die Fasen 20 bzw. die Rundungsabschnitte 20' unmittelbar am den Öffnungbereich begrenzenden äußeren Rand der betreffenden Rille 14 (vgl. Figur 1) bzw. Blindbohrung 16 (vgl. Figur 2) ausgebildet. Im vorliegenden Fall ist die in Richtung der Rillen- bzw. Bohrungstiefe gemessene Kantenlänge y einer jeweiligen Fase 20 bzw. eines jeweiligen Rundungsabschnitts 20' etwas größer als die Tiefe des sich an den Boden 22 anschließenden zylindrischen Wandabschnitts 24.In the embodiments shown in Figures 1 and 2 are the Chamfers 20 and the rounding sections 20 'directly at the opening area limiting outer edge of the respective groove 14 (see FIG 1) or blind bore 16 (see FIG. In the present case is the measured in the direction of the groove or hole depth edge length y a respective bevel 20 and a respective rounding portion 20 'something greater than the depth of the adjoining the bottom 22 cylindrical Wall section 24.

Dagegen sind bei den in den Figuren 3 und 4 gezeigten Ausführungsbeispielen die Fasen 20 bzw. die Rundungsabschnitte 20' bezüglich des den Öffnungsbereich begrenzenden äußeren Randes der Rille 14 (vgl. Figur 3) bzw. der Blindbohrung 16 (vgl. Figur 4) in Richtung der Rillen- bzw. Bohrungstiefe nach innen versetzt und in einem Abstand a von diesem äußeren Rand ausgebildet.In contrast, in the embodiments shown in Figures 3 and 4 the chamfers 20 and the rounding sections 20 'with respect to the Opening area bounding outer edge of the groove 14 (see Figure 3) or the blind bore 16 (see Figure 4) in the direction of the groove or bore depth offset inwards and at a distance a from this outer Edge formed.

Wie anhand der Figuren 1 und 3 zu erkennen ist, ist der Boden 22 der Rille 14 im Querschnitt teilkreisförmig ausgebildet.As can be seen from Figures 1 and 3, the bottom 22 of the Groove 14 of part-circular cross-section.

Gemäß den Figuren 1 und 3 ist jede der beiden sich in Umfangsrichtung des Preßmantels erstreckenden Seitenwände 18 der jeweiligen Rille 14 jeweils mit einer Fase 20 bzw. einem Rundungsabschnitt 20' versehen.According to Figures 1 and 3, each of the two is in the circumferential direction the press jacket extending side walls 18 of the respective groove 14 respectively provided with a chamfer 20 and a rounding portion 20 '.

Bei den beiden in den Figuren 2 und 4 dargestellten Blindbohrungen 16 ist die Seitenwand 18 mit einer sich über deren gesamten Innenumfang erstreckenden ringartigen Fase 20 bzw. Rundungsabschnitt 20' versehen.In the two blind holes 16 shown in FIGS. 2 and 4 is the side wall 18 with a over the entire inner circumference extending annular bevel 20 and rounding portion 20 'provided.

Wie anhand der Figuren 3 und 4 zu erkennen ist, ist die in Richtung der Rillen- bzw. Bohrungstiefe gemessene Kantenlänge y der Fase 20 sowohl größer als der Abstand a dieser Fase vom äußeren Rand als auch größer als die Tiefe des zwischen dem Boden 22 und der Fase 20 vorgesehenen zylindrischen Wandabschnitts 24. As can be seen from Figures 3 and 4, which is in the direction of Groove or hole depth measured edge length y of the chamfer 20 both greater than the distance a of this bevel from the outer edge and larger as the depth of the provided between the bottom 22 and the chamfer 20 cylindrical wall section 24.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Preßmantelpress jacket
1212
äußere Mantelflächeouter jacket surface
1414
Rillengrooves
1616
Blindbohrungblind hole
1818
Seitenwändeside walls
2020
Fasechamfer
20'20 '
Rundungsabschnittrounding section
2222
Bodenground
- 24- 24
zylindrischer Wandabschnittcylindrical wall section
aa
Abstanddistance

Claims (9)

  1. Press cover (10) for a pressing apparatus for treating a material web, such as in particular a paper or board web, in a press nip, having grooves (14) which are provided in the outer circumferential surface (12) and the side walls (18) of which, extending at least in the circumferential direction of the press cover, are provided in the opening region with a chamfer (20), of which the edge length (y) measured in the direction of the depth of the groove is about 1 to 3 times the edge length (x) measured in the longitudinal direction and/or has a rounded section (20') extending in accordance with a curved line, the edge length (y) of the rounded section measured in the direction of the depth of the groove, preferably in relation to a tangent to the rounded section (20'), being about 1 to 3 times the edge length (x) measured in the longitudinal direction, preferably in relation to the tangent, in order to counteract a reduction in volume which occurs under press loading, the edge length (y) of the chamfer (20) or of the rounded section (20') measured in the direction of the depth of the groove being dimensioned such that a cylindrical wall section (24) remains between the base (22) of a respective groove (14) and the chamfer (20) or the rounded section (20'), characterized in that the base (22) of the groove (14) is formed with a cross section in the shape of a part circle or tapering to a point.
  2. Press cover according to Claim 1, characterized in that the edge length (y) of the chamfer (20) measured in the direction of the depth of the groove is about 2 times the edge length (x) measured in the longitudinal direction.
  3. Press cover according to Claim 1 or 2, characterized in that the edge length (x) of the chamfer (20) measured in the longitudinal direction lies in a range from about 0.1 mm to about 0.3 mm and is preferably about 0.2 mm.
  4. Press cover according to one of the preceding claims, characterized in that the edge length (y) of the rounded section measured in the direction of the depth of the groove, preferably in relation to a tangent to the rounded section (20'), is about 2 times the edge length (x) measured in the longitudinal direction, preferably in relation to the tangent.
  5. Press cover according to one of the preceding claims, characterized in that the edge length (x) of the rounded section measured in the longitudinal direction, preferably in relation to a tangent to the rounded section (20'), lies in a range from about 0.1 mm to about 0.3 mm and is preferably about 0.2 mm.
  6. Press cover according to one of the preceding claims, characterized in that the rounded section (20') extends in accordance with a curved line which at least approximately corresponds to a circular arc.
  7. Press cover according to one of the preceding claims, characterized in that the rounded section (20') extends in accordance with a curved line which at least substantially corresponds to an involute.
  8. Press cover according to one of the preceding claims, characterized in that the chamfer (20) or the rounded section (20') is formed at the outer edge of a respective groove (14).
  9. Press cover according to one of Claims 1 to 7, characterized in that the chamfer (20) or the rounded section (20') is offset inwards in the direction of the depth of the groove with respect to the outer edge of a respective groove (14) and is formed at a distance (a) from the said edge.
EP99104438A 1998-04-30 1999-03-05 Press blanket Expired - Lifetime EP0953678B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19819526 1998-04-30
DE19819526A DE19819526A1 (en) 1998-04-30 1998-04-30 Press jacket

Publications (4)

Publication Number Publication Date
EP0953678A2 EP0953678A2 (en) 1999-11-03
EP0953678A3 EP0953678A3 (en) 2001-02-07
EP0953678B1 true EP0953678B1 (en) 2005-06-08
EP0953678B2 EP0953678B2 (en) 2011-05-04

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EP99104438A Expired - Lifetime EP0953678B2 (en) 1998-04-30 1999-03-05 Press blanket

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US (1) US6416630B1 (en)
EP (1) EP0953678B2 (en)
JP (1) JP4331315B2 (en)
AT (1) ATE297484T1 (en)
DE (2) DE19819526A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7144480B2 (en) * 2003-04-17 2006-12-05 Albany International Corp. Grooved belt with rebates
JP3958730B2 (en) 2003-09-24 2007-08-15 ヤマウチ株式会社 Press belt and shoe press roll
JP4916133B2 (en) 2005-05-31 2012-04-11 イチカワ株式会社 Shoe press belt
JP4659891B2 (en) 2009-04-10 2011-03-30 イチカワ株式会社 Shoe press belt
AU2014323586B2 (en) * 2013-09-20 2017-01-19 Stowe Woodward Licensco Llc Soft rubber roll cover with wide grooves

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Publication number Priority date Publication date Assignee Title
GB1050823A (en) * 1900-01-01
DE276833C (en) *
FI761030A (en) * 1976-04-14 1977-10-15 Valmet Oy
JPS617598U (en) * 1984-06-20 1986-01-17 市川毛織株式会社 Pressure belt for surface pressure nip press of paper machine
FR2596433B1 (en) * 1986-04-01 1989-04-28 Gerland Stowe Woodward Ind Bv PRESS CYLINDER IN PARTICULAR FOR REMOVING LIQUID FROM SHEET MATERIAL, SUCH AS PAPER PULP, CONTINUOUSLY PRODUCED, AND PRESS COMPRISING SUCH A CYLINDER
DE3708605A1 (en) 1987-03-17 1988-09-29 Boettcher Gmbh & Co Felix PRESS ROLLER FOR THE DRAINAGE OF FABRIC RAILS
JPS6436960U (en) * 1987-08-28 1989-03-06
DE4340724A1 (en) * 1993-11-30 1995-06-01 Sigri Great Lakes Carbon Gmbh Fiber-reinforced plastic roller with diamond pattern
US5543015A (en) * 1994-10-18 1996-08-06 Tamfelt Corp. Groove configuration for a press belt in an extended nip press
DE4438354A1 (en) * 1994-10-27 1996-05-02 Voith Sulzer Papiermasch Gmbh Paper web pressure roller mantle
DE19654198A1 (en) 1996-12-23 1998-06-25 Voith Sulzer Papiermasch Gmbh Machine for the production of a fibrous web
AU749247B2 (en) * 1998-04-22 2002-06-20 Albany International Corp. Resin-impregnated belt having a texturized outer surface for application on papermaking machines

Also Published As

Publication number Publication date
DE19819526A1 (en) 1999-11-04
JPH11335992A (en) 1999-12-07
JP4331315B2 (en) 2009-09-16
DE59912133D1 (en) 2005-07-14
EP0953678A2 (en) 1999-11-03
EP0953678B2 (en) 2011-05-04
ATE297484T1 (en) 2005-06-15
US6416630B1 (en) 2002-07-09
EP0953678A3 (en) 2001-02-07

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