EP1281805A2 - Dispositif de pressage - Google Patents

Dispositif de pressage Download PDF

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Publication number
EP1281805A2
EP1281805A2 EP02007875A EP02007875A EP1281805A2 EP 1281805 A2 EP1281805 A2 EP 1281805A2 EP 02007875 A EP02007875 A EP 02007875A EP 02007875 A EP02007875 A EP 02007875A EP 1281805 A2 EP1281805 A2 EP 1281805A2
Authority
EP
European Patent Office
Prior art keywords
press
arrangement according
shoe
belt
press arrangement
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.)
Withdrawn
Application number
EP02007875A
Other languages
German (de)
English (en)
Other versions
EP1281805A3 (fr
Inventor
Andreas Meschenmoser
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
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 filed Critical Voith Paper Patent GmbH
Publication of EP1281805A2 publication Critical patent/EP1281805A2/fr
Publication of EP1281805A3 publication Critical patent/EP1281805A3/fr
Withdrawn legal-status Critical Current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
    • D21F3/04—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
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/02—Mechanical driving arrangements

Definitions

  • the invention relates to a press arrangement for treating a fibrous web, especially paper or cardboard web.
  • tandem NipcoFlex presses were the rule two successive double felted shoe presses are provided.
  • tandem NipcoFlex presses are just like the so-called Ultra-NipcoFlex presses only drive one roller at a time.
  • These known presses have the disadvantage, among other things, that in Machine direction relatively high transverse and / or shear forces in the press nip occur.
  • the aim of the invention is to provide an improved press arrangement at the beginning to create the type mentioned, in which, inter alia, the aforementioned Problems are eliminated.
  • a press arrangement with only one shoe press, which is double felted and one elongated in the web running direction between two shoe press units, has at least essentially flat press nip, by the two sides the fibrous web each has at least one driven endless Tape is performed.
  • the length of the press nip of the shoe press for example are in the range of about 500 mm.
  • the belt drive speeds are on the two Sides of the fibrous web are at least substantially the same.
  • the shoe press is preferably designed so that it is in the Z direction considered a symmetrical drainage of the fibrous web results.
  • Press arrangement is the one running through the press nip of the shoe press Press plane inclined to the vertical.
  • the two shoe press units can each have a revolving area of the press nip guided over a press shoe flexible endless Include tape, in particular as a sealing tape of the hydraulic Shoe press rollers is executed.
  • a flexible press belt is guided around each shot press unit, the blind drilled and / or grooved or as a water-permeable screen fabric is executed.
  • the two flexible press belts are advantageously each driven.
  • an endless felt belt passed through the press nip of the shoe press be driven.
  • the sealing tapes can be used in particular in combination with water-permeable Press belts (sieve belts) are also blind drilled and / or grooved his.
  • the press arrangement can in particular be modular. In order to can easily be used to cover a large basis weight range corresponding press concepts, each with a single, one Flat press nip extended in the direction of web travel Realize shoe press.
  • the fibrous web becomes the press arrangement according to the invention through a felt belt led through the press nip of the shoe press taken from a wire belt or forming wire.
  • the relevant one can Felt belt in the area of the transfer point around a suction guide roller be led.
  • the fibrous web is, for example, by the top felt taken from the screen belt.
  • Embodiment of the press arrangement according to the invention is the Shoe press upstream a preferably leverless pre-press, which preferably a particularly self-pressing deflection compensation roller and includes a counter roll cooperating therewith.
  • the pre-dewatering takes place accordingly the amount of water in the shoe press.
  • the backing roll of the pre-press can in particular be a press suction roll be educated.
  • the fibrous web is preferably in the region of one height-adjustable pickup roller through a through the press nip
  • the pre-roll felt belt is taken over by a wire belt.
  • the pickup roller is preferably adjustable accordingly, is one universal adaptation of this pickup roller to the screen height possible. there the fibrous web can hang freely on the pick-up felt up to the pre-press.
  • the pre-press expediently embodied without crowning comprises preferably a single-zone deflection compensation roller with freely movable Jacket, i.e. a so-called single-zone Nipco-F roller, whereby an optimal felt and web run is achieved.
  • the shoe press is preceded by a preferably leverless pre-press, which a deflection compensating roller and one cooperating with it Counter roller includes, which also serves as a pickup roller, in the Area the fibrous web is taken over by a screen belt. You get a NipcoCombi pre-press and a subsequent one Flachnip shoe press.
  • NipcoCombi pre-press is preferred the so-called screen drive roller (compare, for example, roller 98 in Fig. 2) pivotally arranged.
  • the NipcoCombi pre-press can be used for Adaptation to the existing sieve height can be arranged at any height.
  • the fibrous web can, in particular, reach the transfer point in the sandwich be arranged.
  • the backing roll of the pre-press is preferably by a press suction roll formed, which can also fulfill a pickup function.
  • the pre-press has a steam blow box assigned.
  • the last-mentioned pre-press is again preferably without crowning executed and with a single-zone deflection compensation roller provided with a freely movable jacket, which results in an optimal Felt and web run results.
  • an offset press may be provided, which is preferably free-standing is.
  • the web preheating on the first drying cylinder is expected to better smoothness can be achieved with low line force.
  • the preferably leverless offset press can in particular be without Crowning carried out and with a single-zone deflection compensation be provided with a freely movable jacket.
  • a single-zone Nipco-F roller results in an inexpensive, leverless offset press with variable line force for optimal offset operation and Web travel.
  • the driven flexible press belts can in particular be water-storing or have water permeability, i.e. e.g. be blind drilled and / or grooved or designed as screen mesh.
  • sealing tapes can be used to seal the shot press units be provided on the surface e.g. smooth or blind drilled and / or can be grooved.
  • nip shoe press with a single, in particular large flat nip shoe press can be a straight, long nip up for example, about 500 mm can be realized. Because of the straight Press nips with belt drive on both sides do not generate shear forces in the machine direction and no slip in the sandwich passed through the nip on. The alternating bending stress of the sealing tapes or the press or Sieve belts of the shoe press units are reduced, which results in result in longer terms. The sealing tape or press tape stress or dent at the end of the roll is reduced: there is a higher nip dewatering capacity through the additional drainage function reached due to the driven press belts or fabric belts, whereby there is a large application window for a mono shoe press.
  • FIG. 1 to 3 show different, purely exemplary variants of a Press arrangement 10 for treating a fibrous web 12, in which it can in particular be a paper or cardboard web.
  • the respective press arrangement 10 comprises only a single double felted shoe press with a between two shoe press units 16, 18th formed in the web running direction L extended, at least substantially flat press nip or nip 20. This is extended, flat Press nip 20 on both sides of the fibrous web 12 at least one driven endless belt 22 to 26 guided.
  • the length of the press nip 20 of the shoe press 14 can, for example, in Range of about 500 mm.
  • the belt drive speeds on both sides of the fibrous web are preferably at least substantially the same.
  • the shoe press 14 can in particular be designed in this way be considered symmetrical drainage in the Z direction the fibrous web 12 results.
  • the press nip 20 of the respective shoe press 14 running press plane 30 against the Vertical 32 be inclined.
  • the angle of inclination is ⁇ for example in the range of about 25 °.
  • the two shoe press units 16, 18 each comprise a rotating, guided in the area of the press nip 20 via a press shoe 34 or 36 Band 94, 96 and a flexible endless belt 22 and 24, in particular designed as a water-storing or water-permeable press belt can be.
  • these flexible bands 22, 24 each have a non-circular cylindrical course, with them over guide rollers 38 and 40 are guided and the relevant shoe press units 16, 18 can be open at the side.
  • the shoe press units but also by shoe press rolls with a respective sealing jacket 94, 96 may be formed, which are sealed at their ends.
  • the two are flexible Belts 22, 24 each driven, for which purpose at least one guide roller, for example 38 or 40, can be driven accordingly.
  • the press assembly 10 is modular, so that each the desired variant can be easily implemented.
  • the web discharge following the shoe press 14 can, for example, in each case via a drying sieve assigned to the first drying cylinder 46 48 take place in the area of a suction roll 50, via which the dryer fabric 48 is guided to the fibrous web 12, for example from the lower Take over felt belt 26 and feed it to the drying cylinder 46.
  • Variant of the press arrangement 10 is the fibrous web 12 by a felt belt guided by the press nip 20 of the shoe press 14, in the present case If the upper felt belt 28 is taken over by a sieve belt 52. This felt strip 28 is in the area of the takeover point by one Suction guide roller 54 guided, which is driven in the present case.
  • a suitable variant of the press arrangement 10 is the shoe press 14 preferably upstream leverless press 56.
  • This pre-press 56 in the present case comprises a deflection compensation roller 58 and a counter roller 60 cooperating with the counter roller 60 can be formed in particular by a press suction roll.
  • the pre-press 56 can, in particular, be designed without crowning and with a single-zone deflection compensation roller 58 with freely movable Coat.
  • the lower felt belt 26 of the shoe press 14 is above the counter roller 60 guided.
  • the deflection compensation roller 58 is inside the loop another felt belt 62 is arranged. Through the press nip of this pre-press 56 are thus the lower one with the fibrous web 12 in between Felt belt 26 of the shoe press 14 and the further felt belt 62 guided.
  • the fibrous web 12 is preferably adjustable Pick-up roller 64 through the guided by the press nip of the roughing roller 56 Felt belt 62 taken from the wire belt 52.
  • the result of the preliminary dewatering in the leverless Nipco pre-press 56 a corresponding reduction in the amount of water in the shoe press 14.
  • the pre-press 56 is a short remoistening distance in which the paper on the bottom felt 26 is fed to the press nip 20 becomes. It is a universal adaptation of the pickup roller 64 to the Height of the sieve belt 52 possible.
  • the fibrous web 12 hangs freely on Pick-up felt belt 62 up to the pre-press 56.
  • the result is an optimal one Felt and web run, the pre-press 56, as already mentioned, without Crowning and be provided with a single-zone Nipco-F roller 58 can.
  • the shoe press 14 is preferably a variant of the press arrangement 10 upstream leverless press 66, which has a deflection compensation roller 68 and a counter roller cooperating with this 70 includes, which also serves as a pickup roller, in the area of which Fibrous web 12 is taken over by the wire belt 52.
  • the deflection adjustment roller 68 within the loop of the lower screen belt 26 of the shoe press 14 and the counter roller 70 within the loop of another felt band 74 is arranged.
  • the counter roll 70 of the pre-press 66 can in particular be a combi press suction roll be educated.
  • the pre-press 66 is preferably again executed without crowning and with a single-zone deflection compensation roller 68 provided with a freely movable jacket.
  • the counter roller 70 is preferably adjustable again.
  • the pre-press 66 can be a steam blow box 76 can be assigned.
  • the two felt belts 26, 74 are one Piece widely led vertically upward to within an area the suction guide roller 78 arranged in the loop of the felt belt 26 to be separated from each other.
  • the fibrous web 12 is then subsequently through the lower felt belt 26 the extended flat press nip the shoe press 14 fed.
  • NipcoCombi pre-press 66 and one following flat-nip shoe press 14.
  • Pre-drain through the leverless pre-press 66 brings a corresponding reduction in Amount of water in the shoe press.
  • the rewetting at heavy varieties is relatively small.
  • the height-adjustable pickup roller 70 or NipcoCombi pre-press 66 is a universal adaptation to the height of the sieve belt 52 possible.
  • the fibrous web 12 is up to Transfer point in the area of the suction guide roller 78 with the felt belts 26 and 74 sandwich formed. Also with those in question here heavy papers, there is no web waste.
  • the order steam box 76 is purely optional. With the NipcoCombi pre-press 66 without crowning and with single-zone Nipco-F roller 68 results an optimal felt and web run.
  • the fibrous web 12 can before and after the offset press 80 each be guided with a short free train.
  • the preferably leverless offset press 80 can in particular be without Crowning carried out and with a single-zone deflection compensation roller 82 be provided with a freely movable jacket.
  • a single-zone deflection compensation roller 82 be provided with a freely movable jacket.
  • the drying cylinder 46 assigned at least one scraper 84.
  • the fibrous web 12 is in the area of a Screen guide roller 90 taken over by a further dryer screen 92 that the web 12 is fed to the subsequent drying group 72, which is, for example, a so-called "DuoRun" can.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
EP02007875A 2001-07-05 2002-04-09 Dispositif de pressage Withdrawn EP1281805A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10132652 2001-07-05
DE2001132652 DE10132652A1 (de) 2001-07-05 2001-07-05 Pressenanordnung

Publications (2)

Publication Number Publication Date
EP1281805A2 true EP1281805A2 (fr) 2003-02-05
EP1281805A3 EP1281805A3 (fr) 2005-02-09

Family

ID=7690741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02007875A Withdrawn EP1281805A3 (fr) 2001-07-05 2002-04-09 Dispositif de pressage

Country Status (2)

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EP (1) EP1281805A3 (fr)
DE (1) DE10132652A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133465A1 (fr) * 2008-06-11 2009-12-16 Voith Patent GmbH Agencement de presse
WO2011151201A1 (fr) * 2010-06-01 2011-12-08 Voith Patent Gmbh Partie humide d'une machine destinée à fabriquer des bandes de matière fibreuse et utilisation d'une telle partie humide

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4906724B2 (ja) 2004-08-16 2012-03-28 ボイス パテント ゲーエムベーハー 単一のニッププレスを備える製紙機械

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI820642L (fi) * 1981-04-30 1982-10-31 Beloit Corp Press med foerlaengt nyp
US4483745A (en) * 1982-09-29 1984-11-20 Beloit Corporation Method and apparatus of sheet transfer using a nonporous smooth surfaced belt
US5868904A (en) * 1993-12-08 1999-02-09 Valmet Corporation Press section employing an extended nip press with suction counter roll
DE19642733A1 (de) * 1996-10-16 1998-04-23 Voith Sulzer Papiermasch Gmbh Preßvorrichtung
DE19644108A1 (de) * 1996-10-31 1998-05-07 Voith Sulzer Papiermasch Gmbh Schuhpresse
DE10054674A1 (de) * 2000-11-03 2002-05-08 Voith Paper Patent Gmbh Schuhpresse

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133465A1 (fr) * 2008-06-11 2009-12-16 Voith Patent GmbH Agencement de presse
WO2011151201A1 (fr) * 2010-06-01 2011-12-08 Voith Patent Gmbh Partie humide d'une machine destinée à fabriquer des bandes de matière fibreuse et utilisation d'une telle partie humide

Also Published As

Publication number Publication date
DE10132652A1 (de) 2003-01-16
EP1281805A3 (fr) 2005-02-09

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