WO2006114343A1 - Machine pour produire une bande de matiere fibreuse - Google Patents

Machine pour produire une bande de matiere fibreuse Download PDF

Info

Publication number
WO2006114343A1
WO2006114343A1 PCT/EP2006/060135 EP2006060135W WO2006114343A1 WO 2006114343 A1 WO2006114343 A1 WO 2006114343A1 EP 2006060135 W EP2006060135 W EP 2006060135W WO 2006114343 A1 WO2006114343 A1 WO 2006114343A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
machine according
fibrous web
press nip
paper
Prior art date
Application number
PCT/EP2006/060135
Other languages
German (de)
English (en)
Inventor
Ingolf Cedra
Original Assignee
Voith 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 Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2006114343A1 publication Critical patent/WO2006114343A1/fr

Links

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
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/0073—Accessories for calenders
    • D21G1/0093—Web conditioning devices

Definitions

  • the invention relates to a machine for producing a paper or another fibrous web having a press section, in which the fibrous web can be guided via a central roll forming two press nips with first and a second press roll
  • a press section for a paper machine has two pressing points, which are each formed by a press roller cooperating with a shoe press roll.
  • a first upper felt, the paper web coming from a forming wire, an underfelt and a press jacket of a first shoe press roll pass through the first press point.
  • the underfelt continues with the paper web to the second press site. Together with a second top felt and a press jacket of a second press site, the paper web then passes through the second press site.
  • the paper web follows the underfelt further up to a take-off roll, through which it is transferred to a first dryer wire which transfers the paper web to the dryer section.
  • Guide rollers and suction rollers are provided for deflecting the upper felt and the lower felt.
  • a press section for a paper machine in which a central roll (Fig. 1) is used, which cooperates in two press nips with a press roll and a shoe press roll.
  • the fibrous web is guided on both sides: in the first press nip by a felt and a transfer belt, in the second press nip by the transfer belt and another band.
  • SC-A paper super calendered
  • the press nips can also be formed by shoe press rolls. Subsequently, a free-standing press unit is preferably arranged for a fourth press nip.
  • the fibrous web is smoothed by at least two calenders with a plurality of nips (multinip calenders). The calenders follow the speed of calendering paper machine production.
  • the fibrous web is usually dried in the dryer section to a residual moisture content of 2 to 3% and moistened before the reeling station still within the paper machine with the help of a water applicator, such as a nozzle moistener.
  • the residence time of the wound with the paper web of the after winding in the paper machine to the calendering of the paper web in the calenders is between 0.5 and 2 hours. Thanks to the drying out and the long dwell time, a very good moisture distribution in all directions within the paper web can be assumed.
  • a roll-blade former with or without flexible strips in the twin-wire area and a conventional three-nip press with or without Schuhnip used in conjunction with a multi-pin calender.
  • the productivity in an online process can be significantly higher due to the loss of rewinding losses caused by winding, unwinding and rewinding the paper web after calendering.
  • a conventional press section which is designed as a three-nip press without an additional free-standing fourth press generally shows a very strong structure two-sidedness of the paper due to asymmetric dewatering conditions in the press, as in the second and third press nip the dewatering takes place only to the top.
  • the dry content may indeed be increased significantly, which generally leads to a higher speed and consequently also to a higher productivity.
  • the heavier dewatering to the top further increases paper two-sidedness. Therefore, for high quality papers a free-standing fourth press with drainage reversal to the bottom is absolutely necessary.
  • the disadvantage of this concept is that the paper web must be conveyed over two areas in the open draw. It runs freely between the central roll after the third press and from the fourth press. This has a negative impact on the runnability of the paper web. The paper web overstretches. It can tears and transverse contractions occur, which significantly reduce the maximum speed potential.
  • this object is achieved in a machine of the type mentioned in that the fibrous web can be passed together with a transfer belt through the press nips formed between the central roller and the press rollers.
  • the paper web For further mechanical dewatering after the wire section, the paper web, supported and guided by press felts or impermeable or permeable transfer belts, passes through several press nips formed by pairs of rolls. Due to the intensive contact of the paper web with the felt surface in the press nip, it is necessary for high quality papers to allow each paper side to be in final contact with a smooth roller or a smooth transfer belt. This smoothing takes place in a conventional press section with or without Schuhnip on the central roll and for the upper side in a subsequent press in which the paper web passes through a fourth press nip.
  • SC papers high-quality uncoated magazine papers
  • a fourth press nip is essential, with the paper web being led through the press nip together with an underfelt for smoothing.
  • This nip can also be used as a Schuhnip with extended residence time to enhance the smoothness effect.
  • Pressnips which is arranged in a free-standing press, removed using an evacuated transfer roller and transferred to another suction roller with the underfelt or a permeable, absorbable transfer belt.
  • the transfer suction roll advantageously has a rubberized one Sheath surface on. It can also be equipped with a drilling pattern in its roll shell. For safe removal of the paper web, the roller can be variably adjusted in its immersion depth with respect to the paper web and the transfer belt. For this purpose, an adjusting device is provided, by means of which the roller is movable.
  • novel press felts can be used in all positions.
  • An extremely fine surface of the press felts is due to the use of a certain amount of molten fiber material. By this measure, the negative appearing felt marks are drastically reduced.
  • the advantages of the invention are that highest production speeds due to the achievement of maximum dry contents after passing through the wire section and the press section and as a result of minimizing the free draws in the press section by the use of the transfer belt are possible. Due to the wet smoothness effect in the press section on both sides of the paper web also a gentle calendering is possible. By means of the press section constructed according to the invention, best printability properties, especially for gravure printing, are achieved on account of improved topography properties of the base paper.
  • the fibrous web is formed in a vertical gap former, in particular twin-wire former.
  • the gap former has flexible formation strips. As a result, the formation and the pressure balance in half and full tones is improved. Experiments have shown that through the use of flexible formation strips in one Drainage range between 2% and 8% dry content, preferably between 3% and 6% dry content, the formation index according to Ambertec can be significantly reduced.
  • the formation strips are advantageously pressed against the sandwich, consisting of the two forming fabrics with interposed fibrous web, with a contact pressure in the range between 5kPA and 3OkPa, preferably between 8kPa and 25kPa.
  • the flexible formation strips cause additional drainage in the twin-wire area.
  • the wrap angle of the forming roll through the two forming fabrics is between 30 ° and 60 °, preferably between 40 ° and 55 °.
  • the forming fabrics used should ensure a sufficiently high dewatering rate, have a low water storage volume and have a fine paper-side surface.
  • Forming fabrics with a sieve thickness of less than 0.7 mm, preferably less than 0.65 mm and with a number of fiber support points of more than 1400 / cm 2 , preferably more than 1500 / cm 2 , more preferably more than 1600 / cm 2 are for this purpose particularly suitable.
  • the fibrous web passes through a drying section and is dried in this.
  • a drying section There are different ways to dry the fibrous web, for example by drying on heated cylinders or by Impallströmtrocknung with hot air.
  • the multi-pin calendering device can have between 6 and 12 rollers.
  • the multinip calendering device is an on-line calendering device, since, for example, offline calenders permit significantly lower web speeds and a repeated rewinding of the paper web is necessary.
  • an offline calendering device can also make sense.
  • Offest horrin- applications has been found, for example, in experiments with fibers with a high fines content that over-drying of the fibrous web and subsequent humidifying between dryer section and online Multinip -Kalander is advantageous, whereby disturbances in dimensional stability such as cockling and fluting significantly reduced or be prevented.
  • a preferred embodiment of the method according to the invention therefore provides that the moisture content of the fibrous web when leaving the dryer section is below the equilibrium moisture content at standard conditions.
  • a further preferred embodiment of the method according to the invention further provides that the fibrous web before entering the
  • Calendering device is preferably selectively moistened in the cross machine direction. By selective moistening in the cross-machine direction, moisture transverse profile fluctuations can be compensated.
  • a preferred embodiment of the invention therefore provides that one of the two sides of the fibrous web is brought into contact in each case with a heated roller in a first sequence of Kariemips and that the other of the two sides of the fibrous web in the following in a second sequence of Kariemips each with a heated roller is brought into contact.
  • each side of the fibrous web is moistened, which is brought into contact with the heated rollers.
  • another embodiment provides that the fibrous web is moistened on both sides prior to entry into the calendering device. Furthermore, it is possible to provide additional humidifying devices between the above-mentioned locations in order to apply the required amount of moisture to the fibrous web.
  • Fibrous web is moistened to a moisture content of 7% to 9%, preferably to a moisture content of 8%.
  • the fibrous web has a moisture content of 7% to 9%, preferably 8%, before each succession of Kalander dips.
  • the fibrous web is moistened by means of steam humidifier and / or nozzle moistener.
  • intaglio paper or SC paper which preferably has a filler content of 25% or more, more preferably a filler content of 30% or more.
  • the invention will be explained in more detail in an embodiment.
  • the single figure shows a schematic view of a press section.
  • a fibrous web 1 (figure), coming from a wire section, passed through a press section. In this, it is supported by a lower felt 2 and a top felt 3, passed through a first press nip 4, which is formed by a Presssaugwalze 5 with a press roll 6. After the press nip 4, the underfelt 2 is again separated from the fibrous web 1, so that these, on the top felt 3rd lying, between the Presssaugwalze 5 and a central roller 6 is passed through a second press nip 7.
  • a transfer belt 8 is passed together with the fibrous web 1 through the press nip 7. Subsequently, the top felt 3 is led away from the press suction roll 5.
  • the fibrous web 1 is now passed together with the transfer belt 8 and another upper felt 9 through a press nip 10, which is of the
  • Shoe press roll 12 is formed. Here is the one side 19 of the
  • Fiber web 1 in contact with the smooth transfer belt 8 and the other side
  • the fibrous web 1 is sucked off by a transfer suction roll 13 from the transfer belt 8 and transferred by means of another transfer suction roll 14 onto a lower felt 15. Thereafter, the fibrous web 1 together with the lower felt 15 by belonging to a free-standing press unit
  • Press rollers 16, 17 passed, which together form a fourth press nip 18.
  • the one side 19 of the fibrous web 1 is guided in contact with the lower felt 15 and the other side 20 of the fibrous web 1 in contact with the lateral surface of the press roll 17 through the last press nip 18 of the press section. Due to the two-sided treatment of the fibrous web with a smooth surface when passing through a press nip a two-sidedness of the fibrous web 1 is almost completely prevented.

Abstract

La présente invention concerne une machine conçue pour produire une bande de papier ou d'une autre matière fibreuse (1) comprenant une section des presses dans laquelle la bande de matière fibreuse (1) peut être guidée par l'intermédiaire d'un rouleau central (6) formant deux lignes de contact (7, 10) avec un premier rouleau de presse (5) et un second rouleau de presse (11). Cette invention est caractérisée en ce que la bande de matière fibreuse (1) peut passer avec une bande de transfert (8) à travers les lignes de contact (7, 10) formées entre le rouleau central (6) et les rouleaux de presse (5, 12)
PCT/EP2006/060135 2005-04-28 2006-02-21 Machine pour produire une bande de matiere fibreuse WO2006114343A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005000046.0 2005-04-28
DE200510000046 DE102005000046A1 (de) 2005-04-28 2005-04-28 Maschine zur Herstellung einer Faserstoffbahn

Publications (1)

Publication Number Publication Date
WO2006114343A1 true WO2006114343A1 (fr) 2006-11-02

Family

ID=36218256

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/060135 WO2006114343A1 (fr) 2005-04-28 2006-02-21 Machine pour produire une bande de matiere fibreuse

Country Status (2)

Country Link
DE (1) DE102005000046A1 (fr)
WO (1) WO2006114343A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100273744A1 (en) * 2009-04-24 2010-10-28 Paul Martin Gore Compounds
US8765746B2 (en) 2010-10-13 2014-07-01 Millennium Pharmaceuticals, Inc. Heteroaryls and uses thereof
US8796314B2 (en) 2009-01-30 2014-08-05 Millennium Pharmaceuticals, Inc. Heteroaryls and uses thereof
US8796268B2 (en) 2010-08-11 2014-08-05 Millennium Pharmaceuticals, Inc. Heteroaryls and uses thereof
CN112585318A (zh) * 2018-08-14 2021-03-30 福伊特专利有限公司 用于制造纸幅或纸板幅的造纸机和方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007002514A1 (de) * 2007-01-17 2008-07-24 Voith Patent Gmbh Verfahren zum Herstellen von hochwertigen Papieren
FI122398B (fi) * 2008-06-19 2011-12-30 Metso Paper Inc Menetelmä paperikoneen yhteydessä ja paperikone

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0496965A1 (fr) * 1991-01-26 1992-08-05 J.M. Voith GmbH Section de presse
EP0504123A1 (fr) * 1991-03-15 1992-09-16 Valmet Paper Machinery Inc. Section de formage à double toile d'une machine à papier
EP0657579A1 (fr) * 1993-12-08 1995-06-14 Valmet Paper Machinery Inc. Section de pressage d'une machine à papier utilisant une presse à zone de pressage prolongée
US5759353A (en) * 1995-08-24 1998-06-02 Valmet Corporation Web former in a paper machine
WO2000055423A1 (fr) * 1999-03-12 2000-09-21 Metso Paper, Inc. Procede et dispositif permettant de manipuler une bande de papier ou de carton
US6197159B1 (en) * 1997-10-07 2001-03-06 Voith Sulzer Papiertechnik Patent Gmbh Paper making machine and method for web transfer
US20040083910A1 (en) * 1999-09-29 2004-05-06 Antti Heikkinen Multi-roll calender
WO2004101885A1 (fr) * 2003-05-13 2004-11-25 Mitsubishi Heavy Industries, Ltd. Presse a lisser de presse a papier, presse de machine a papier a presse a lisser, et procede de fabrication de papier
WO2005010275A2 (fr) * 2003-07-23 2005-02-03 Voith Paper Patent Gmbh Procede et dispositif de production d'une bande de matiere fibreuse, notamment d'une bande papier sc-a- ou sc-b
DE10342733A1 (de) * 2003-09-16 2005-04-21 Voith Paper Patent Gmbh Pressanordnung

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0496965A1 (fr) * 1991-01-26 1992-08-05 J.M. Voith GmbH Section de presse
EP0504123A1 (fr) * 1991-03-15 1992-09-16 Valmet Paper Machinery Inc. Section de formage à double toile d'une machine à papier
EP0657579A1 (fr) * 1993-12-08 1995-06-14 Valmet Paper Machinery Inc. Section de pressage d'une machine à papier utilisant une presse à zone de pressage prolongée
US5759353A (en) * 1995-08-24 1998-06-02 Valmet Corporation Web former in a paper machine
US6197159B1 (en) * 1997-10-07 2001-03-06 Voith Sulzer Papiertechnik Patent Gmbh Paper making machine and method for web transfer
WO2000055423A1 (fr) * 1999-03-12 2000-09-21 Metso Paper, Inc. Procede et dispositif permettant de manipuler une bande de papier ou de carton
US20040083910A1 (en) * 1999-09-29 2004-05-06 Antti Heikkinen Multi-roll calender
WO2004101885A1 (fr) * 2003-05-13 2004-11-25 Mitsubishi Heavy Industries, Ltd. Presse a lisser de presse a papier, presse de machine a papier a presse a lisser, et procede de fabrication de papier
EP1662042A1 (fr) * 2003-05-13 2006-05-31 Mitsubishi Heavy Industries, Ltd. Presse a lisser de presse a papier, presse de machine a papier a presse a lisser, et procede de fabrication de papier
WO2005010275A2 (fr) * 2003-07-23 2005-02-03 Voith Paper Patent Gmbh Procede et dispositif de production d'une bande de matiere fibreuse, notamment d'une bande papier sc-a- ou sc-b
DE10342733A1 (de) * 2003-09-16 2005-04-21 Voith Paper Patent Gmbh Pressanordnung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8796314B2 (en) 2009-01-30 2014-08-05 Millennium Pharmaceuticals, Inc. Heteroaryls and uses thereof
US20100273744A1 (en) * 2009-04-24 2010-10-28 Paul Martin Gore Compounds
US8796268B2 (en) 2010-08-11 2014-08-05 Millennium Pharmaceuticals, Inc. Heteroaryls and uses thereof
US8765746B2 (en) 2010-10-13 2014-07-01 Millennium Pharmaceuticals, Inc. Heteroaryls and uses thereof
CN112585318A (zh) * 2018-08-14 2021-03-30 福伊特专利有限公司 用于制造纸幅或纸板幅的造纸机和方法

Also Published As

Publication number Publication date
DE102005000046A1 (de) 2006-11-02

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