EP0953678B2 - Press blanket - Google Patents

Press blanket Download PDF

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Publication number
EP0953678B2
EP0953678B2 EP99104438A EP99104438A EP0953678B2 EP 0953678 B2 EP0953678 B2 EP 0953678B2 EP 99104438 A EP99104438 A EP 99104438A EP 99104438 A EP99104438 A EP 99104438A EP 0953678 B2 EP0953678 B2 EP 0953678B2
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EP
European Patent Office
Prior art keywords
groove
edge
measured
chamfer
edge length
Prior art date
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Expired - Lifetime
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EP99104438A
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German (de)
French (fr)
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EP0953678A3 (en
EP0953678B1 (en
EP0953678A2 (en
Inventor
Uwe Matuschczyk
Endters Andreas
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Voith Patent GmbH
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Voith Patent GmbH
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Classifications

    • 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
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • 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
    • D21F3/083—Pressure rolls perforated
    • 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
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S462/00—Books, strips, and leaves for manifolding
    • Y10S462/90—Adhesive
    • Y10S462/901—Pressure sensitive
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24669—Aligned or parallel nonplanarities
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24669—Aligned or parallel nonplanarities
    • Y10T428/24694—Parallel corrugations

Definitions

  • the invention relates to a press cover according to the preamble of claim 1.
  • Such jackets are used for pressing devices in which a rotating around a rigid support flexible press jacket is pressed against a particular rigid counter surface.
  • a web is guided, which may be in particular a paper or board web. Due to the flexibility of the press jacket this can be used in a long nip press as a jacket of a Schuhpreßtechnik.
  • the groove width is usually in a range of 0.5 to 1.5 mm, with the preferred groove width being 1.0 mm.
  • the depth of the parallel side walls of such grooves is usually in a range of 0.5 to 2.0 mm, the preferred depth being 1.0 mm.
  • Some of the grooves are also conical at an angle of 5 to 15 °.
  • Such a press cover is for example from the US Pat. No. 5,543,015 known.
  • the blind bores usually have a diameter in the range of 1.6 to 2.8 mm, the preferred diameter being 2.2 mm.
  • Such blind bores typically have a depth in the range of 1.5 to 2.5 mm, with the preferred depth being 2.0 mm.
  • These blind holes are usually cylindrical.
  • a press roll of a roll press is off EP 0 241 389 A1 known.
  • the aim of the invention is to provide a press cover of the type mentioned, which ensures the maintenance of the largest possible storage volume despite the relatively high pressing loads and despite the flow properties of the elastomeric materials überally used.
  • a volume reduction occurring at a respective press load is counteracted by providing a chamfer or a rounding section corresponding to a curved line in the critical opening region of a respective groove, which completely or at least partially compensates for the "depression" of the grooves.
  • the purpose specified in the claims form and design of the grooves is based on the new state of a respective press jacket.
  • the edge length of the chamfer measured in the direction of the groove depth is preferably approximately 1 to 3 times and preferably approximately 2 times the edge length measured in the longitudinal direction transversely to the machine direction.
  • the edge length of the chamfer measured in the longitudinal direction may, in particular, be in a range of approximately 0.1 mm to 0.3 mm and preferably approximately 0.2 mm.
  • Corresponding dimensions are also provided in a corresponding to a curved line extending rounding section. In this case, these dimensions are related to a tangent applied to the rounding section.
  • the edge length of the rounding portion measured in the direction of the groove depth, preferably with respect to a tangent to the rounding portion is about 1-3 times, and preferably twice, the edge length measured longitudinally, preferably with respect to the tangent .
  • the edge length of the rounding portion measured longitudinally, preferably with respect to the tangent applied to the rounding portion may be in a range of about 0.1 mm to about 0.3 mm, and preferably about 0.2 mm.
  • the edge length of the chamfer or of the rounding section measured in the direction of the groove depth can in particular also be dimensioned such that a cylindrical wall section remains between the bottom of a respective groove and the chamfer or the rounding section.
  • the rounding section can run in accordance with a curved line, which at least essentially corresponds, for example, to a circular arc or an involute.
  • press cover according to the invention is Chamfer or the rounding section formed directly on the outer edge of a respective groove.
  • the chamfer or the rounding section can be offset inwardly with respect to the outer edge of a respective groove in the direction of the groove depth and be formed at a distance therefrom.
  • At least the side walls of the groove extending in the circumferential direction of the press jacket are preferably each provided with a chamfer or a rounding section.
  • FIGS. 1 to 4 is shown in a schematic, sectioned partial representation in each case a press jacket 10, which is suitable for a pressing device for the treatment of a material web in a press nip.
  • the material web may in particular be a paper or board web.
  • the press coats after the Fig. 2 and 4 are merely illustrative and are not covered by the claims.
  • a rounding section 20 'extending in accordance with a curved line can also be provided in each case.
  • the edge length y measured in the direction of the groove or bore depth (cf. FIGS. 1 to 3 ) of a respective chamfer 20 in the illustrated exemplary embodiments is approximately 1 to 3 times and preferably approximately 2 times the edge length x measured in the longitudinal direction (compare FIGS FIGS. 1 to 3 ).
  • the longitudinally measured edge length x of a respective chamfer is suitably in a range of about 0.1 mm to about 0.3 mm, wherein it is preferably about 0.2 mm.
  • the rounding sections 20 ' which may alternatively be provided instead of the chamfers 20, expediently have comparable edge lengths x and y, these preferably being measured with respect to a tangent applied to the respective rounding section 20', which is in the plane of the respectively replaced chamfer 20 can run (see the Figures 1 and 2 ).
  • a respective chamfer 20 or a respective rounding section 20 ' is dimensioned such that a cylindrical wall section 24 remains between the bottom 22 of a respective groove 14 or a respective blind bore 16 and the chamfer 20 or the rounding section 20'.
  • the chamfers 20 and the Rundungsabête 20 ' directly on the opening region limiting outer edge of the respective groove 14 (see. FIG. 1 ) or blind bore 16 (see. FIG. 2 ) educated.
  • the present case in the direction of the groove or. Hole depth measured edge length y of a respective chamfer 20 and a respective rounding portion 20 'slightly larger than the depth of the adjoining the bottom 22 cylindrical wall portion 24th
  • the bottom 22 of the groove 14 is formed partially circular in cross section.
  • each of the two extending in the circumferential direction of the press jacket side walls 18 of the respective groove 14 is provided in each case with a chamfer 20 and a rounding portion 20 '.
  • the side wall 18 is provided with a extending over the entire inner circumference ring-like chamfer 20 and rounding portion 20 '.
  • the edge length y of the chamfer 20 measured in the direction of the groove or bore depth is both greater than the distance a of this chamfer from the outer edge and greater than the depth of the cylindrical wall section 24 provided between the base 22 and the chamfer 20 ,

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 gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a press cover according to the preamble of claim 1.

Derartige Preßmäntel werden 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 in einer Langspaltpresse als Mantel einer Schuhpreßeinheit verwendet werden.Such jackets are used for pressing devices in which a rotating around a rigid support flexible press jacket is pressed against a particular rigid counter surface. By the press nip formed between the flexible press cover and the counter surface, a web is guided, which may be in particular a paper or board web. Due to the flexibility of the press jacket this can be used in a long nip press as a jacket of a Schuhpreßeinheit.

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 üblicher welse 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 dewatering work press jackets are partially provided with grooves or blind holes, with which an additional, as constant as possible water storage volume is to be achieved during the term. The groove width is usually in a range of 0.5 to 1.5 mm, with the preferred groove width being 1.0 mm. The depth of the parallel side walls of such grooves is usually in a range of 0.5 to 2.0 mm, the preferred depth being 1.0 mm. Some of the grooves are also conical at an angle of 5 to 15 °. Such a press cover is for example from the US Pat. No. 5,543,015 known. The blind bores usually have a diameter in the range of 1.6 to 2.8 mm, the preferred diameter being 2.2 mm. Such blind bores typically have a depth in the range of 1.5 to 2.5 mm, with the preferred depth being 2.0 mm. These blind holes are usually cylindrical.

Eine Preßwalze einer Walzenpresse ist aus EP 0 241 389 A1 bekannt.A press roll of a roll press is off EP 0 241 389 A1 known.

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 the elastomeric materials usually used for such press jackets, the grooves or blind holes are "pressed" during operation, with a cross-sectional constriction occurs in particular in the opening area. As a result, however, the storage volume resulting during operation is in some cases considerably reduced compared to the original storage volume given in the new state and in the absence of load. The desired with the grooves or blind holes actual advantage of increased drainage performance in the nip by the additional storage volume is therefore at least partially nullified. In practice, in particular, it has also been shown that the at an angle of 5 to 15 ° conically extending grooves of the US-A-5 543 015 known press jacket 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 üblichervveise 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, which ensures the maintenance of the largest possible storage volume despite the relatively high pressing loads and despite the flow properties of the elastomeric materials überally used.

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 eine Fase bzw. ein entsprechend einer Kurvenlinie verlaufender Rundungsabschnitt vorgesehen ist, die bzw. der das "Zudrücken" der Rillen 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, a volume reduction occurring at a respective press load is counteracted by providing a chamfer or a rounding section corresponding to a curved line in the critical opening region of a respective groove, which completely or at least partially compensates for the "depression" of the grooves. The purpose specified in the claims form and design of the grooves is based on the new state of a respective press jacket.

Dabei beträgt die in Richtung der Rillentiefe 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 edge length of the chamfer measured in the direction of the groove depth is preferably approximately 1 to 3 times and preferably approximately 2 times the edge length measured in the longitudinal direction transversely to the machine direction. The edge length of the chamfer measured in the longitudinal direction may, in particular, be in a range of approximately 0.1 mm to 0.3 mm and preferably approximately 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 provided in a corresponding to a curved line extending rounding section. In this case, these dimensions are related to a tangent applied to the rounding section.

Entsprechend beträgt bei einer zweckmäßigen Ausführungsform die in Richtung der Rillentiefe 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 edge length of the rounding portion measured in the direction of the groove depth, preferably with respect to a tangent to the rounding portion, is about 1-3 times, and preferably twice, the edge length measured longitudinally, preferably with respect to the tangent , In addition, the edge length of the rounding portion measured longitudinally, preferably with respect to the tangent applied to the rounding portion, may be in a range of about 0.1 mm to about 0.3 mm, and preferably about 0.2 mm.

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

Der Rundungsabschnitt kann entsprechend einer Kurvenlinie verlaufen, die zumindest im wesentlichen beispielsweise einem Kreisbogen oder einer Evolvente entspricht.The rounding section can run in accordance with a curved line, which at least essentially corresponds, for example, to a circular arc or an involute.

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

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

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, at least the side walls of the groove extending in the circumferential direction of the press jacket are preferably each provided with a chamfer or a rounding section.

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

Figur 1
eine schematische, geschnittene Teildarstel- lung 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 Teildarstel- lung einer weiteren Ausführungsform eines Preßmantels, in der eine Blindbohrung zu er- kennen ist, die am äußeren Rand mit einer umlaufenden Fase versehen ist,
Figur 3
eine schematische, geschnittene Teildarstel- lung einer weiteren Ausführungsform eines Preßmantels, in der eine Rille zu erkennen ist, deren Fasen bezüglich des äußeren Ran- des nach innen versetzt sind, und
Figur 4
eine schematische, geschnittene Teildarstel- lung einer weiteren Ausführungsform eines Preßmantels, in der eine Blindbohrung zu er- kennen ist, deren Fase bezüglich des äuße- ren 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
1 is a schematic, partial sectional view of a first embodiment of a press jacket, in which a groove can be seen, which is provided at the outer edge with two mutually opposite chamfers,
FIG. 2
1 is a schematic, partially sectioned sectional view of a further embodiment of a press jacket, in which a blind bore can be seen, which is provided with a circumferential chamfer on the outer edge;
FIG. 3
a schematic, partial sectional view of a further embodiment of a press jacket, in which a groove is to be seen, the chamfers are offset inwardly with respect to the outer edge, and
FIG. 4
a schematic, partial sectional view of a further embodiment of a press jacket, in which a blind bore is to be recognized, 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. Die Preßmäntel nach den Fig. 2 und 4 dienen lediglich der Erläuterung und fallen nicht unter den Shutz der Ansprüche.In the FIGS. 1 to 4 is shown in a schematic, sectioned partial representation in each case a press jacket 10, which is suitable for a pressing device for the treatment of a material web in a press nip. The material web may in particular be a paper or board web. The press coats after the Fig. 2 and 4 are merely illustrative and are not covered by the claims.

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 14 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 a occurring during pressing load volume reduction counteract.

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 1 und 2 gestrichelt dargestellt.Instead of the chamfers 20 shown in solid lines, a rounding section 20 'extending in accordance with a curved line can also be provided in each case. Such rounding sections 20 'are in the Figures 1 and 2 shown in dashed 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 (cf. FIGS. 1 to 3 ) of a respective chamfer 20 in the illustrated exemplary embodiments is approximately 1 to 3 times and preferably approximately 2 times the edge length x measured in the longitudinal direction (compare FIGS FIGS. 1 to 3 ). The longitudinally measured edge length x of a respective chamfer is suitably in a range of about 0.1 mm to about 0.3 mm, wherein it is 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 may alternatively be provided instead of the chamfers 20, expediently have comparable edge lengths x and y, these preferably being measured with respect to a tangent applied to the respective rounding section 20', which is in the plane of the respectively replaced chamfer 20 can run (see the 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 in the FIGS. 1 to 4 illustrated embodiments of a press jacket 10 is measured in the direction of the groove or bore depth edge length y (see FIGS. 1 to 3 a respective chamfer 20 or a respective rounding section 20 'is dimensioned such that a cylindrical wall section 24 remains between the bottom 22 of a respective groove 14 or a respective blind bore 16 and the chamfer 20 or the rounding section 20'.

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 in the Figures 1 and 2 Dashed lines indicated rounding 20 'may in particular be corresponding to a curved line, for example, at least approximately corresponds to a circular arc or at least substantially 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 in the Figures 1 and 2 illustrated embodiments, the chamfers 20 and the Rundungsabschnitte 20 'directly on the opening region limiting outer edge of the respective groove 14 (see. FIG. 1 ) or blind bore 16 (see. FIG. 2 ) educated. In the present case, in the direction of the groove or. Hole depth measured edge length y of a respective chamfer 20 and a respective rounding portion 20 'slightly larger than the depth of the adjoining the bottom 22 cylindrical wall portion 24th

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 in the FIGS. 3 and 4 shown embodiments, the chamfers 20 and the rounding sections 20 'with respect to the opening area limiting outer edge of the groove 14 (see. FIG. 3 ) or the blind bore 16 (see. FIG. 4 ) offset in the direction of the groove or bore depth inwards and formed at a distance a from this outer edge.

Wie anhand der Figuren 1 und 3 zu erkennen ist, ist der Boden 22 der Rille 14 im Querschnitt teilkreisförmig ausgebildet.As based on the FIGS. 1 and 3 can be seen, the bottom 22 of the groove 14 is formed partially circular in 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 the FIGS. 1 and 3 each of the two extending in the circumferential direction of the press jacket side walls 18 of the respective groove 14 is provided in each case 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 in the Figures 2 and 4 shown blind bores 16, the side wall 18 is provided with a extending over the entire inner circumference ring-like chamfer 20 and rounding portion 20 '.

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 based on the FIGS. 3 and 4 1, the edge length y of the chamfer 20 measured in the direction of the groove or bore depth is both greater than the distance a of this chamfer from the outer edge and greater than the depth of the cylindrical wall section 24 provided between the base 22 and the chamfer 20 ,

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 shoe press unit of a pressing apparatus designed as an extended nip press 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 base of which is formed with a cross section in the shape of a part circle and which have side walls (18), extending at least in the circumferential direction of the press cover, characterized in that the side walls (18) 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 have 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, and 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').
  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 EP0953678B1 (en) 2005-06-08
EP0953678B2 true EP0953678B2 (en) 2011-05-04

Family

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Application Number Title Priority Date Filing Date
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
EP3047067B1 (en) * 2013-09-20 2017-06-28 Stowe Woodward Licensco LLC Industrial roll with a soft rubber cover comprising wide grooves

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DE276833C (en) †
GB1050823A (en) † 1900-01-01
FR2348316A1 (en) † 1976-04-14 1977-11-10 Valmet Oy ENDLESS DOUBLE WHEEL FORMING SECTION OF PAPER MACHINE
EP0241389A1 (en) † 1986-04-01 1987-10-14 GERLAND STOWE WOODWARD INDUSTRIES BV Société en nom collectif dite : Pressure roll, particularly for extracting liquid from a sheet material, such as a continuous web of paperstock, and press comprising such a roll
DE3708605A1 (en) † 1987-03-17 1988-09-29 Boettcher Gmbh & Co Felix PRESS ROLLER FOR THE DRAINAGE OF FABRIC RAILS
US5543015A (en) † 1994-10-18 1996-08-06 Tamfelt Corp. Groove configuration for a press belt in an extended nip press

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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
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
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
BR9810262A (en) * 1998-04-22 2000-09-12 Albany Int Corp Belt impregnated with resin having a textured outer surface for application in papermaking machines

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DE276833C (en) †
GB1050823A (en) † 1900-01-01
FR2348316A1 (en) † 1976-04-14 1977-11-10 Valmet Oy ENDLESS DOUBLE WHEEL FORMING SECTION OF PAPER MACHINE
EP0241389A1 (en) † 1986-04-01 1987-10-14 GERLAND STOWE WOODWARD INDUSTRIES BV Société en nom collectif dite : Pressure roll, particularly for extracting liquid from a sheet material, such as a continuous web of paperstock, and press comprising such a roll
DE3708605A1 (en) † 1987-03-17 1988-09-29 Boettcher Gmbh & Co Felix PRESS ROLLER FOR THE DRAINAGE OF FABRIC RAILS
US5543015A (en) † 1994-10-18 1996-08-06 Tamfelt Corp. Groove configuration for a press belt in an extended nip press

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JP4331315B2 (en) 2009-09-16
DE59912133D1 (en) 2005-07-14
US6416630B1 (en) 2002-07-09
JPH11335992A (en) 1999-12-07
EP0953678A3 (en) 2001-02-07
EP0953678B1 (en) 2005-06-08
EP0953678A2 (en) 1999-11-03
DE19819526A1 (en) 1999-11-04
ATE297484T1 (en) 2005-06-15

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