EP0928843A2 - Dispositif de pressage - Google Patents

Dispositif de pressage Download PDF

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Publication number
EP0928843A2
EP0928843A2 EP98121252A EP98121252A EP0928843A2 EP 0928843 A2 EP0928843 A2 EP 0928843A2 EP 98121252 A EP98121252 A EP 98121252A EP 98121252 A EP98121252 A EP 98121252A EP 0928843 A2 EP0928843 A2 EP 0928843A2
Authority
EP
European Patent Office
Prior art keywords
pressure
roller
press
arrangement according
counter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98121252A
Other languages
German (de)
English (en)
Other versions
EP0928843B1 (fr
EP0928843A3 (fr
Inventor
Hans Prinzing
Rainer Bentele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Voith Sulzer Papiertechnik Patent 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 Voith Paper Patent GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0928843A2 publication Critical patent/EP0928843A2/fr
Publication of EP0928843A3 publication Critical patent/EP0928843A3/fr
Application granted granted Critical
Publication of EP0928843B1 publication Critical patent/EP0928843B1/fr
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
    • 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
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • 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
    • D21F3/06—Means for regulating the pressure
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0206—Controlled deflection rolls
    • D21G1/0213—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member
    • D21G1/022—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member the means using fluid pressure

Definitions

  • the invention relates to a press arrangement for treating a fibrous web, in particular paper and / or cardboard web, with a between a shoe press unit and a counter roll formed in the web running direction extended press nip and one between the counter roll and a further roll formed nip, the shoe press unit a rotating around a non-rotatable carrier, in the area of the extended Press nip by at least one support element on the carrier supported flexible press belt and the counter roll as a deflection compensation roll with a circumferential around a non-rotatable carrier Roll jacket is formed in the region of the extended press nip again supported by at least one support element on the carrier in question , and wherein the preferably pressurized fluid-operated support elements are designed and acted upon so that the generated by the support elements on the flexible press belt Shoe press unit or the roller jacket of the inner roller acting inner Contact pressure sets a differential pressure.
  • nip controlled nip line force that is as flat as possible can be generated by a corresponding Differential pressure or a corresponding line force difference between the shoe press unit and the counter roller is reached.
  • the differential pressure causes the in the extended nip between the Shoe press unit and the counter-acting line force not in full
  • the circumference is balanced by the inner support elements of the counter roller becomes.
  • the remaining force causes the counter roll to deform both in the extended nip formed with the shoe press unit, the be easily balanced by the flexible support element of the shoe press unit can, as well as in between the counter roller and the other roller formed nip.
  • a known central roller has an additional row of support elements, provided in the direction of the nip towards the previous roller is and regulates the deflection compensation in this nip.
  • Such an additional row of support elements is now significant additional effort and correspondingly expensive.
  • the aim of the invention is to provide a simple, inexpensive construction To create press arrangement of the type mentioned, in which the Line force in the nip can be set in a relatively wide range and the resultant in this nip transverse to the web running direction Pressing pressure profile can be varied without an additional support element rows the counter roller is required.
  • differential pressure is changeable. It is preferable with the differential pressure also the line force difference between the shoe press unit and the counter roller changeable.
  • the exchange the further roll forming the nip with the counter roll simplified another roller with a different stiffness, being different Rigidity for example on the material, the wall thickness or, in the case of a suction roll, can be traced back to the drilling pattern.
  • there is also an easier adaptation to another Size of the deformation in the nip for example by a changed vacuum in the further roller can be caused.
  • a changed vacuum in the further roller can be caused.
  • differential pressure or the line force difference is continuously changeable at least in some areas.
  • To change the differential pressure can, for example, by Support elements of the shoe press unit produced on their flexible press belt acting internal contact pressure or, for example, by generated the support elements of the counter roll, acting on the roll shell internal contact pressure can be changed. Basically, however, it is also possible that to change the differential pressure both by generated the support elements of the shoe press unit, on their flexible Press band acting internal contact pressure as well as that through the support elements the counter roll generated, acting on the roll shell inner Contact pressure is changeable.
  • the support elements of the shoe press unit and / or the support elements of the Counter roll can be sent individually, in groups or in total to the common Pressurized fluid line must be connected.
  • Support elements can be between at least one, preferably each of these Groups of support elements and the common pressure fluid line adjustable pressure reducing means can be provided.
  • To reduce the Pressure individually enclosed on the common pressure fluid line Support elements can be between at least one, preferably each of these individual support elements and the common pressure fluid line adjustable pressure reducing means can be provided.
  • the Pressure reducing means at least one variably adjustable valve.
  • the differential pressure is medium Predefinable characteristics depending on the line force in the nip adjustable.
  • the differential pressure can also depend on the line force correction specifications be adjustable for the nip, the Line force correction specifications preferably via an electronic control can be entered and / or via corresponding signals of a process control system to be provided.
  • the differential pressure can in particular also via a control system comprising at least one closed control loop be adjustable.
  • the line force can be changed in a further nip, the is formed between the further roller and an additional roller.
  • the additional roller can be, for example, a suction roller act.
  • At least the counter roller and / or the one with it is expedient the further roll forming the nip is cambered.
  • Such a crowning can due to the changeable differential pressure or the changeable Line force difference will be less than usual. In particular Such cases can also be dispensed with entirely become.
  • the press arrangement according to the invention is the shoe press unit by a shoe press roll with a flexible press jacket formed as a press belt.
  • the shoe press unit is expediently above the counter roller arranged.
  • the level of action of the at least one support element of the counter roller with respect to the plane of action of the at least one support element of the shoe press unit is slightly inclined. In principle, however, it is also possible that the Plane of action of the at least one support element of the counter roll the plane of action of the at least one support element of the shoe press unit at least essentially coincides.
  • Figures 1 and 2 is a first in a purely schematic representation Embodiment of a treatment of a fibrous web 10 as in particular a press arrangement serving paper and / or cardboard web shown.
  • the shoe press roll 12 arranged directly above the counter roll 14 has a rotating around a rotationally fixed carrier 22, in the area of extended press nip 16 by a support element 24 on the carrier 22nd supported, flexible press jacket 26 serving as a press belt.
  • the counter roller 14 is in the present case as a deflection compensation roller educated. It has a rotating around a non-rotatable carrier 28 Roller jacket 30, in the area of the extended press nip 16 by a row extending transversely to the web running direction L. Support elements 32 is supported on the carrier 28 in question. As with 1 can be seen, the suction roller 18 is obliquely below the counter roller 14 is arranged. The rollers 12, 14 and 18 are in one chair not shown stored. Through the press nips 16 and 20 run next to the fibrous web 10 drainage felts 34 for inclusion of water squeezed out of the fibrous web 10.
  • roller jacket 30 of the counter-roller 14 Since the roller jacket 30 of the counter-roller 14 has bearings 42 at the ends is fixed on the carrier 28, the effect of the inclination of the support elements 32 (cf. in particular FIG. 1) resulting deformation of the roll shell 30 of the counter roller 14 particularly strong in the middle area so that the roller jacket 30 there more strongly towards the suction roller 18 deformed.
  • the support element 24 is the Shoe press roll 12 and the support elements 32 of the counter roll 14 to one common pressure fluid line 44 connected.
  • the support members 32 of the counter roller 14 in present case in groups with this common pressure fluid line 44 connected.
  • the pressure fluid-actuated support elements 24 and 32 can be acted upon in such a way that that with respect to those generated by these support members 24, 32 the flexible press jacket 26 of the shoe press roll 12 or the roll jacket 30 of the counter roller 14 acting internal contact pressures a differential pressure sets, partly due to a different size the contact surfaces of the support elements 24, 32 can be determined.
  • this differential pressure can be changed.
  • this differential pressure is in particular the line force difference between the Shoe press roll 12 and the counter roll 14 changeable.
  • the transverse profile of the differential pressure resulting transversely to the web running direction L. between the shoe press roll 12 and the counter roll 14 changeable, so that in particular different differential pressures the width are adjustable.
  • variable differential pressure between the shoe press unit 12 and the counter roller 14 are thus corresponding the line force in the nip 20 can also be changed, in this nip 20 adjustable at least substantially flat line forces are.
  • the differential pressure or the line force difference can at least be continuously changeable in some areas.
  • the differential pressure or the line force difference is adjustable from the outside in the present case.
  • the setting can be, for example, mechanical, hydraulic, pneumatic, manual, remote controlled, on site, starting from a control room and / or process-controlled.
  • the differential pressure can, for example by means of predefinable characteristics depending on the line force in the Roll gap 20 to be adjustable. In particular, it can also be dependent line force correction specifications for the nip 20 adjustable be.
  • the setting is made via an electronic Control 62.
  • the respective line force correction specifications and / or the like via corresponding Process control system signals are provided.
  • the differential pressure over at least one closed control loop comprehensive control system to be adjustable.
  • variable pressure reducing means 46 can be used.
  • the line forces in the nip 20 can then be adjusted in an even larger line force range, wherein in the nip 20 always creates a flat pressing force cross profile can be.
  • edge corrections can be made via correction specifications the line force in the nip 20 in the positive direction (Edge overpressure) and in the negative direction (edge relief).
  • FIG. 3 is a schematic cross-sectional representation of another one Embodiment of a press arrangement with four press rolls shown.
  • a differential pressure or a line pressure difference 60 where the differential pressure or the line pressure difference 60 can be changed again and are preferably variable and infinitely adjustable.
  • the line force in the further nip 48 can also be changed.
  • This differential pressure or this line pressure difference 60 can between the shoe press roll 12 and the counter roll 14 in particular be variable and infinitely adjustable. This changes again the deflection of the central or counter roll 14 in the nip 20 and thus the pressure distribution in this nip 20.
  • the setting of the line pressure difference 60 or the differential pressure also takes place in the present exemplary embodiment again via an electronic control 62.
  • the setting can be mechanical, hydraulic, pneumatic, manually operated, remote controlled, on site, starting from a control room and / or process-controlled.
  • the variable line force difference can be used in particular to influence the pressure distribution be drawn into the nip 20 without the respective desired line forces in the press nips 20, 16 and 48 changed become.
  • Via the variable differential pressure or the variable line pressure difference can also in particular the line force in the nip 20 adjusted in a relatively large area in the desired manner become. In addition, there is a targeted influence on the conditions in the another nip 48 possible.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Paper (AREA)
EP98121252A 1998-01-12 1998-11-07 Dispositif de pressage Expired - Lifetime EP0928843B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19800807A DE19800807A1 (de) 1998-01-12 1998-01-12 Pressenanordnung
DE19800807 1998-01-12

Publications (3)

Publication Number Publication Date
EP0928843A2 true EP0928843A2 (fr) 1999-07-14
EP0928843A3 EP0928843A3 (fr) 2000-11-22
EP0928843B1 EP0928843B1 (fr) 2003-10-15

Family

ID=7854376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98121252A Expired - Lifetime EP0928843B1 (fr) 1998-01-12 1998-11-07 Dispositif de pressage

Country Status (5)

Country Link
US (1) US6942761B1 (fr)
EP (1) EP0928843B1 (fr)
JP (1) JP4316709B2 (fr)
CA (1) CA2258342A1 (fr)
DE (2) DE19800807A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1156153A1 (fr) * 2000-05-18 2001-11-21 Valmet-Karlstad AB Machine à papier crêpé souple et sa section de presses
WO2001088259A1 (fr) * 2000-05-18 2001-11-22 Metso Paper Karlstad Ab Machine a papier crepe et sa section presse

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7717847B2 (en) * 2004-04-05 2010-05-18 Tyco Healthcare Group Lp Surgical hand access apparatus
AU2005231485B2 (en) 2004-04-05 2010-08-05 Covidien Lp Surgical hand access apparatus
JP5283409B2 (ja) * 2008-03-25 2013-09-04 大王製紙株式会社 段ボール用ライナーの製造方法
JP2009293138A (ja) * 2008-06-03 2009-12-17 Daio Paper Corp 段ボール用中芯原紙の製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745725A2 (fr) * 1995-06-03 1996-12-04 Voith Sulzer Papiermaschinen GmbH Presse à rouleaux
DE29706432U1 (de) * 1996-09-20 1997-06-12 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Preßvorrichtung zur Behandlung einer Materialbahn

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19522761C2 (de) * 1995-06-27 2000-11-16 Voith Sulzer Papiermasch Gmbh Schuh-Preßeinrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745725A2 (fr) * 1995-06-03 1996-12-04 Voith Sulzer Papiermaschinen GmbH Presse à rouleaux
US5788817A (en) * 1995-06-03 1998-08-04 Voith Sulzer Papiermaschinen Gmbh Three roll press
DE29706432U1 (de) * 1996-09-20 1997-06-12 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Preßvorrichtung zur Behandlung einer Materialbahn

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1156153A1 (fr) * 2000-05-18 2001-11-21 Valmet-Karlstad AB Machine à papier crêpé souple et sa section de presses
WO2001088259A1 (fr) * 2000-05-18 2001-11-22 Metso Paper Karlstad Ab Machine a papier crepe et sa section presse
US6998022B2 (en) 2000-05-18 2006-02-14 Metso Paper Karlstad Aktiebolag Paper machine and press section thereof
US7153389B2 (en) 2000-05-18 2006-12-26 Metso Paper Karlstad Aktiebolag Method of manufacturing a soft crepe paper web

Also Published As

Publication number Publication date
EP0928843B1 (fr) 2003-10-15
CA2258342A1 (fr) 1999-07-12
US6942761B1 (en) 2005-09-13
DE19800807A1 (de) 1999-07-15
EP0928843A3 (fr) 2000-11-22
JPH11247085A (ja) 1999-09-14
JP4316709B2 (ja) 2009-08-19
DE59809921D1 (de) 2003-11-20

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