EP0469338B1 - Pressmantel für eine Presseinrichtung - Google Patents

Pressmantel für eine Presseinrichtung Download PDF

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Publication number
EP0469338B1
EP0469338B1 EP91111293A EP91111293A EP0469338B1 EP 0469338 B1 EP0469338 B1 EP 0469338B1 EP 91111293 A EP91111293 A EP 91111293A EP 91111293 A EP91111293 A EP 91111293A EP 0469338 B1 EP0469338 B1 EP 0469338B1
Authority
EP
European Patent Office
Prior art keywords
threads
press
peripheral
pouring
shell
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.)
Expired - Lifetime
Application number
EP91111293A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0469338A1 (de
Inventor
Uwe Matuschczyk
Karl Dr. Steiner
Harald Aufrecht
Christian Schiel
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.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
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 JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0469338A1 publication Critical patent/EP0469338A1/de
Application granted granted Critical
Publication of EP0469338B1 publication Critical patent/EP0469338B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • D21F3/0236—Belts or sleeves therefor manufacturing methods
    • 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
    • D21F3/0245—Means for fixing the sleeve to the roller end
    • 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
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/901—Impermeable belts for extended nip press

Definitions

  • the invention relates to a press jacket for a press device, in particular for dewatering or smoothing a material web, e.g. Paper web, serves.
  • a press jacket with the features specified in the preamble of claim 1 is known from WO 88/08897.
  • the peculiarity of this known press jacket is that the reinforcing threads are not in the form of a fabric (such as the subject of U.S. Patent 4,552,620), but are all fairly exactly parallel to the outer surfaces of the press jacket within the elastomeric jacket material; because the reinforcing threads are arranged in two layers (or "layers"), longitudinal threads forming an inner layer and circumferential threads forming an outer layer.
  • the circumferential threads are wrapped in the press jacket in the manner of a single or multi-start screw line.
  • Another essential feature of the known, as well as the press casing according to the invention is that the elastomeric material layer is produced from a single casting and is therefore completely homogeneous, although it encases the reinforcing threads on all sides.
  • the reinforcing threads are nowhere directly on an outer surface of the press jacket and therefore do not protrude anywhere from the outer surface, e.g. the subject of Figures 2 and 3 of the aforementioned U.S. Patent 4,552,620.
  • Press jackets of this type are exposed to high stresses during operation.
  • a press jacket is subjected to high pressure and flexing stress when it passes through the press zone of the press device.
  • the press jacket In the case of the formation of the press jacket as a tubular roller jacket attached to his is closed at both ends (by attachment to sheave support disks), there is a tensile stress due to the internal pressure.
  • the fastening of the press jacket ends to the jacket support disks mentioned also has the consequence that the press jacket ends are not able to follow any expansion of the press jacket in the circumferential direction. From this follows the requirement that the press jacket must have an extremely high tensile strength in the circumferential direction so that the extensibility in the circumferential direction is as small as possible.
  • the invention is therefore based on the object of providing a press jacket which has an increased service life in comparison with the known designs.
  • the invention enables two opposing requirements to be met at the same time, namely on the one hand to achieve the highest possible tensile strength in the circumferential direction (and thus very little extensibility) and on the other hand to give the press jacket in the circumferential direction a substantially improved "bending softness" compared to previously. In this way, it is possible in particular to significantly reduce the stresses on the press jacket due to the relatively sharp deflections in the press nip inlet and outlet.
  • Press sleeves with the above-mentioned small thickness have already been used in papermaking machines. However, these are press sleeves with woven (i.e. stiffening) reinforcement inserts, in which the outer fabric threads protrude from the elastomeric sheath material and are therefore at risk of wear.
  • a press jacket is known from EP 0 354 743 A1, with ribs running in the circumferential direction (and grooves in between), in which one circumferential thread or two circumferential threads, for example 0.5 mm in diameter, lies in each rib. Because of the generally very small width of the ribs (order of magnitude 2 mm), however, it appears doubtful whether the circumferential threads - during the manufacture of the press cover - can be placed in the ribs with the required accuracy without (at least in places) protruding into the grooves.
  • the tensile strength of all circumferential threads - based on a unit area of the press jacket - is higher (preferably by at least 40% higher) than the tensile strength of all longitudinal threads.
  • the circumferential threads can be formed from a material of higher tensile strength (e.g. from carbon fibers) than the longitudinal threads, which e.g. can consist of a polyamide as before.
  • the thread diameter of the circumferential threads according to the invention should only be approximately 1/4000 to 1/1000 (in special cases up to 1/500) of the outer diameter of the press jacket. If, on the other hand, the press jacket is to be used as a laterally open press belt loop (according to FIG. 5 of US Pat. No. 4,552,620), the thread diameter of the peripheral threads should be approximately between 1/8000 to 1/2000 of an imaginary belt diameter, e.g. the outer diameter of the casting cylinder required to produce the press jacket.
  • the press casing according to the invention is predominantly produced in accordance with the information in WO 88/08897.
  • the devices for clamping the longitudinal threads on a casting cylinder are described there in detail; this description is therefore not repeated here.
  • FIG. 1 shows a partial cross section through a long-gap press device with a press jacket according to the invention.
  • FIG. 2 shows an enlarged detail A from FIG. 1.
  • Figure 3 is a schematic view of a portion of a press jacket with the reinforcing threads therein.
  • FIG. 4 schematically shows a cross section through a device for producing a press jacket.
  • FIG. 5 is an enlarged partial longitudinal section along line V of FIG. 4.
  • Figure 6 is a partial longitudinal section through another press jacket design.
  • the essential elements of the (and largely known) pressing device shown in Fig. 1 are a stationary support body 11 (of which only a small part is visible), a multi-part press shoe 13 which is displaceable parallel to a press plane E and a counter roll 15. Der Press shoe 13 is divided into a lower part 14 and an upper part 16.
  • the lower part 14 is arranged as a piston in a pressure chamber 12 (formed as a recess in the supporting body 11 and delimited by sealing strips which rest in sealing strip carriers 18 and 19).
  • the upper part 16 has a predominantly concave sliding surface adapted to the shape of the counter-roller 15, over which a press jacket 10 slides.
  • the press shoe upper part 16 forms, together with the counter roll 15, a so-called “extended” press nip which has the length b in the running direction (indicated by an arrow).
  • a felt belt 21 runs through the press nip, and between these two a paper web 20, which is indicated by a dotted line.
  • the press jacket 10 runs in an essentially circular orbit, the center of which is designated 9a and the radius of which is R (the axis of rotation 9a of the press jacket 10 is offset from the central axis 7a of the stationary support body 11).
  • the press shoe upper part 16 has an extension 17 which forms a rounded transition from the circular orbit to the concave part of the sliding surface. A similar rounded transition is provided at the outlet from the press nip.
  • the thickness d of the press jacket 10 is approximately (order of magnitude) 3 to 5 mm.
  • the outer diameter of the press jacket ie twice the sum of radius R and thickness d
  • the outer diameter of the press jacket is, for example, in the order of 1.5 m. In a special case it can also be smaller than 1.0 m.
  • Sheath support disks, to which the two ends of the press jacket 10 are fastened and which are rotatably mounted about the axis of rotation 9a, are not shown in FIG. 1.
  • Fig. 2 shows a greatly enlarged section of the press jacket 10 (detail A of FIG. 1).
  • the elastomeric sheath material 22 e.g. polyurethane
  • the reinforcing threads 23 and 24 completely embedded therein.
  • the number of circumferential threads 24, based on a unit area piece, is significantly larger than the number of longitudinal threads 23.
  • the number of circumferential threads 24 can be three times greater than the number of longitudinal threads 23.
  • the diameter e of the longitudinal threads 23 is of the same order of magnitude as the diameter f of the peripheral threads 24, and that the same or similar materials are used for the longitudinal and peripheral threads.
  • the apparatus for producing a press jacket 10 shown in FIG. 4 includes a stationary machine table 25, a support 26 which can be moved longitudinally thereon and a casting cylinder 28 rotatably mounted in end shields 27.
  • a drive (not shown) is provided, which is coupled to a rotatable spindle 29, which is used to move the support 26 (in guide rails 30).
  • the speed of the casting cylinder 28 and the running speed of the support 26 are coordinated.
  • the support 26 there are storage containers 33 for the components of the elastomeric jacket material, as well as a mixer 34, a feed line 35 and a pouring nozzle 36. The mouth of the latter is located directly near the surface of the casting cylinder 28.
  • an unwinding device 32 attached for the circumferential threads 24. This unwinding device 32 is arranged behind the casting nozzle 36 with respect to the direction of rotation of the casting cylinder 28 (indicated by an arrow).
  • FIG. 4 schematically shows numerous longitudinal threads 23 stretched approximately parallel to the axis of rotation of the casting cylinder 28 and at a short distance from the cylinder jacket surface.
  • the elastomeric jacket material 22 is poured onto the casting cylinder 28 through the spaces between the longitudinal threads 23 in the form of a helical bead.
  • the circumferential threads 24 run over a deflection roller 31 into the jacket material 22 which has just been poured on.
  • circumferential threads 24 can be wound up simultaneously.
  • the circumferential threads 24 initially dip only a little into the jacket material. Therefore, after one revolution of the casting cylinder 28 (as indicated by dashed lines), further jacket material is poured onto the peripheral threads.
  • the width of the pouring nozzle 36 - seen in a view according to FIG. 5 - is approximately twice as large as the feed of the support 26 5, the arrangement is as follows:
  • the casting nozzle 36 covers both the area (I) of that (for example four threads) circumferential thread winding which is wrapped immediately behind the casting nozzle as well as the area (II) of the preceding (also comprising four threads) circumferential thread turn.
  • the width of the pouring nozzle can be increased further so that it covers, for example, the areas of three or four circumferential thread turns. The result is that relatively thin layers of material overlap each other. If, on the other hand, relatively thick "beads" were simply poured on side by side, there would be the danger that liquid material would still drip off the casting cylinder 28.
  • a press jacket with a greater thickness d can be produced by pouring on a larger amount of elastomer jacket material.
  • circumferential grooves and / or blind bores can be incorporated into the outer surface of the press jacket if necessary (for the purpose of temporarily storing press water in the press nip).
  • a particular advantage of the press jacket 10 according to the invention is its "flexural softness", which is increased compared with that previously used.
  • two layers of circumferential threads for example, can be wrapped in the elastomeric jacket material when the press jacket is manufactured. The thickness of the finished press jacket increases accordingly.
  • FIG. 6 Another possibility is shown in FIG. 6.
  • a certain distance is deliberately provided between the circumferential threads 24 and the longitudinal threads 23, for example in the order of the thread diameter.
  • the circumferential threads 24 are - in the case of only a slight increase in the thickness of the press jacket 10 '- displaced in the vicinity of the outer surface. In this way, especially in the outer layer of the press jacket, the elongation when passing through the press nip can be reduced even further.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)
  • Press Drives And Press Lines (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • External Artificial Organs (AREA)
  • Reciprocating Pumps (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
EP91111293A 1990-07-18 1991-07-06 Pressmantel für eine Presseinrichtung Expired - Lifetime EP0469338B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4022800A DE4022800C1 (enrdf_load_stackoverflow) 1990-07-18 1990-07-18
DE4022800 1990-07-18

Publications (2)

Publication Number Publication Date
EP0469338A1 EP0469338A1 (de) 1992-02-05
EP0469338B1 true EP0469338B1 (de) 1994-09-28

Family

ID=6410496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111293A Expired - Lifetime EP0469338B1 (de) 1990-07-18 1991-07-06 Pressmantel für eine Presseinrichtung

Country Status (7)

Country Link
US (2) US5118391A (enrdf_load_stackoverflow)
EP (1) EP0469338B1 (enrdf_load_stackoverflow)
JP (1) JP2864302B2 (enrdf_load_stackoverflow)
AT (1) ATE112342T1 (enrdf_load_stackoverflow)
CA (1) CA2046800C (enrdf_load_stackoverflow)
DE (2) DE4022800C1 (enrdf_load_stackoverflow)
FI (1) FI109478B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4446308A1 (de) * 1994-12-23 1996-06-27 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125470C2 (de) * 1991-08-01 1995-10-12 Voith Gmbh J M Schuhpresse zum Entwässern einer Faserstoff-Bahn
US5196092A (en) * 1991-09-25 1993-03-23 Albany International Corp. Reinforcement of coated surfaces of lnp belts
DE4202731C2 (de) * 1992-01-31 1997-04-17 Voith Gmbh J M Preßmantel für eine Schuhpresse
DE4411620C2 (de) * 1994-04-02 2001-05-31 Voith Sulzer Papiermasch Gmbh Preßmantel und Verfahren zur Herstellung eines Preßmantels
US5525194A (en) * 1994-04-22 1996-06-11 Tamfelt Corp. Extended nip press belt
US5543015A (en) † 1994-10-18 1996-08-06 Tamfelt Corp. Groove configuration for a press belt in an extended nip press
DE4438354A1 (de) * 1994-10-27 1996-05-02 Voith Sulzer Papiermasch Gmbh Preßmantel und Verfahren zur Herstellung eines Preßmantels
DE4443598C2 (de) * 1994-12-07 2000-05-25 Voith Sulzer Papiermasch Gmbh Verfahren zur Herstellung eines Preßmantels
EP0728691B1 (de) 1995-02-21 2003-09-24 Voith Sulzer Papiermaschinen Gesellschaft mbH Vorrichtung zum Auf bzw. Abwickeln von bahnförmigem Gut, insbesondere von Faserstoffbahnen
DE19706097A1 (de) * 1997-02-17 1998-08-20 Voith Sulzer Papiermasch Gmbh Preßband, insbesondere Preßmantel
US6174825B1 (en) * 1997-12-09 2001-01-16 Albany International Corp. Resin-impregnated belt for application on papermaking machines and in similar industrial application
DE19754631C1 (de) * 1997-12-09 1998-12-10 Scapa Forming Gmbh Verfahren und Vorrichtung zur Herstellung von dehnungsstabilen, flüssigkeitsundurchlässigen, biegsamen Preßmänteln, insbesondere für Schuhpressen von Papiermaschinen
DE19860099A1 (de) 1998-12-23 2000-07-06 Voith Sulzer Papiertech Patent Preßmantel und Verfahren zur Herstellung
US6179945B1 (en) 1998-12-30 2001-01-30 Owens Corning Fiberglas Technology, Inc. Process for filament winding composite workpieces
US6908532B2 (en) 1999-06-01 2005-06-21 Voith Sulzer Papiermaschinen Gmbh Press belt
US6465074B1 (en) 1999-08-25 2002-10-15 Albany International Corp. Base substrates for coated belts
US6752908B2 (en) 2001-06-01 2004-06-22 Stowe Woodward, Llc Shoe press belt with system for detecting operational parameters
DE10139629A1 (de) * 2001-08-11 2003-02-20 Voith Paper Patent Gmbh Pressfilz
DE10156146A1 (de) * 2001-11-15 2003-05-28 Voith Paper Patent Gmbh Walzenmantel
US7014733B2 (en) * 2002-05-14 2006-03-21 Stowe Woodward L.L.C. Belt for shoe press and shoe calender and method for forming same
US20040234716A1 (en) * 2003-05-21 2004-11-25 Madden Michael D. Method for forming endless belt
US6989080B2 (en) * 2003-06-19 2006-01-24 Albany International Corp. Nonwoven neutral line dryer fabric
FI122410B (fi) * 2004-02-03 2012-01-13 Tamfelt Pmc Oy Puristinhihna
DE102009045414A1 (de) 2009-10-07 2011-04-14 Voith Patent Gmbh Presswalze
FI125825B (fi) * 2014-10-24 2016-02-29 Valmet Technologies Inc Kuiturainakoneen hihnatela
US10597817B2 (en) * 2017-09-12 2020-03-24 Cotton, Inc. Balance of durable press properties of cotton fabrics using non-formaldehyde technology
DE102018122778A1 (de) * 2018-09-18 2020-03-19 Voith Patent Gmbh Verfahren zur Herstellung eines Mantels für eine Breitstreckwalze, Breitstreckwalze sowie Verwendung einer solchen
DE102019125908A1 (de) * 2019-09-26 2021-04-01 Voith Patent Gmbh Pressmantel, dessen Verwendung sowie Schuhpresse und Maschine
EP3913132B1 (en) * 2020-05-20 2025-07-09 Valmet Technologies Oy Belt for a sleeve roll and use thereof

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GB643666A (en) * 1947-02-28 1950-09-27 Dayton Rubber Mfg Co Improvements in and relating to aprons for textile machinery
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US4174984A (en) * 1978-10-02 1979-11-20 Dayco Corporation Machine for and method of making tubular conduit of indefinite length
US4229253A (en) * 1979-04-26 1980-10-21 Beloit Corporation Extended nip press with special belt reinforcement
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DE3421364A1 (de) * 1984-06-08 1985-12-12 Bayer Ag, 5090 Leverkusen Verfahren und vorrichtung zum kontinuierlichen herstellen von laenglichen hohlkoerpern, insbesondere von schlaeuchen, rohren oder innenlinern fuer solche, aus einem fluessigen material, wie reaktionsgemisch oder schmelze
DE3715153A1 (de) * 1987-05-07 1988-12-01 Voith Gmbh J M Verstaerkter pressmantel fuer eine presseinrichtung zur behandlung bahnfoermigen gutes, wie z. b. von papierbahnen, sowie verfahren und vorrichtung zu seiner herstellung
DE3727563C1 (de) * 1987-08-19 1989-02-09 Voith Gmbh J M Pressmantel einer Entwaesserungspresse fuer Papierherstellungsmaschinen od.dgl.
DE3808293C2 (de) * 1988-03-12 1994-08-18 Voith Gmbh J M Langspalt-Preßwalze
US5062924A (en) * 1988-04-08 1991-11-05 Beloit Corporation Blanket for an extended nip press with anisotropic woven base layers
GB8818992D0 (en) * 1988-08-10 1988-09-14 Scapa Group Plc Improvements relating to extended nip dewatering presses
DE4016902A1 (de) * 1990-05-25 1991-11-28 Balatros Gmbh Verfahren und vorrichtung zum herstellen eines endlosen, flachen und flexiblen bandes aus giessbarem kunststoff

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4446308A1 (de) * 1994-12-23 1996-06-27 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn
DE4446308C2 (de) * 1994-12-23 2000-10-26 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn

Also Published As

Publication number Publication date
DE59103095D1 (de) 1994-11-03
JPH05125687A (ja) 1993-05-21
FI109478B (fi) 2002-08-15
US5320702A (en) 1994-06-14
CA2046800C (en) 1995-02-21
CA2046800A1 (en) 1992-01-19
FI912812L (fi) 1992-01-19
ATE112342T1 (de) 1994-10-15
EP0469338A1 (de) 1992-02-05
FI912812A0 (fi) 1991-06-11
DE4022800C1 (enrdf_load_stackoverflow) 1991-09-19
JP2864302B2 (ja) 1999-03-03
US5118391A (en) 1992-06-02

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