EP1205599A2 - Machine pour la fabrication d'une bande fibreuse - Google Patents

Machine pour la fabrication d'une bande fibreuse Download PDF

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Publication number
EP1205599A2
EP1205599A2 EP02002779A EP02002779A EP1205599A2 EP 1205599 A2 EP1205599 A2 EP 1205599A2 EP 02002779 A EP02002779 A EP 02002779A EP 02002779 A EP02002779 A EP 02002779A EP 1205599 A2 EP1205599 A2 EP 1205599A2
Authority
EP
European Patent Office
Prior art keywords
press
shoe
shoe press
web
nip
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Withdrawn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
EP02002779A
Other languages
German (de)
English (en)
Other versions
EP1205599A3 (fr
Inventor
Joachim Henssler
Hans Loser
Karl Dr. Steiner
Albrecht Bauder
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 EP1205599A2 publication Critical patent/EP1205599A2/fr
Publication of EP1205599A3 publication Critical patent/EP1205599A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/04Arrangements thereof
    • D21F3/045Arrangements thereof including at least one extended press nip
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/04Arrangements thereof
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00Complete machines for making continuous webs of paper
    • D21F9/003Complete machines for making continuous webs of paper of the twin-wire type

Definitions

  • the invention relates to a machine for producing a fibrous web, especially paper and / or cardboard web.
  • the aim of the invention is to a machine of the type mentioned create, in particular with regard to achieving a possible high dryness and the most gentle treatment possible Fibrous web is further optimized.
  • the object is achieved according to the invention in that it at least two successive drainage zones in the direction of web travel includes, in which the fibrous web each with in the web running direction of a pressure that rises on one side from an initial pressure to an end pressure is that the dewatering of the fibrous web in the direction of web travel considers the first of the two drainage zones as one Web side and in the second drainage zone to the other Web side is done and that the initial pressure in the second drainage zone is lower than the final pressure in the first drainage zone.
  • each one-sided Drainage causing drainage zone can be another drainage zone be provided in the fibrous web at the same time is drained on both sides of the track.
  • the fibrous web is in the two-sided drainage zone preferably between two sieve belts, between two felt belts and / or dewatered between a wire and a felt belt.
  • the one acting on the fibrous web Pressure in at least one drainage zone by the web train at least a sieve and / or felt belt is generated. You can go to Increasing the web tension several sieve or felt belts can be provided.
  • a sieve belt is preferably guided over a suction device.
  • the drainage takes place through the fibrous web in at least one dewatering zone an applied differential pressure.
  • the pressure increase in the second drainage zone is expedient somewhat steeper or equal to the pressure increase in the first drainage zone.
  • the fibrous web is preferably in at least one dewatering zone passed through at least one press nip of a mechanical press.
  • At least one press nip is advantageously one in the web running direction extended press nip formed by a shoe press.
  • At least one simply felted press nip is expediently provided, the fibrous web preferably between the felt and one in particular by a roller, the jacket of a shoe press unit and / or a band formed smooth surface through this press nip is led.
  • the final pressure in a web running direction before a first drainage zone arranged, causing double-sided drainage further drainage zone is preferably lower than or equal to that Initial pressure in the first drainage zone.
  • the machine according to the invention is the initial pressure in a first or second one-sided drainage Drainage zone at least substantially the same size as that Final pressure in the previous one, one-sided drainage too the same side of the drainage zone.
  • the final pressure in the last one-sided drainage to one side of the web dewatering zone is expedient at least essentially equal to the final pressure in the last one-sided Drainage to the other side of the web causing drainage zone.
  • the machine can be used to produce a multilayer fibrous web comprise a multi-layer headbox. It is therefore especially a different material input possible.
  • the sheet-forming material can be h-free or also h-containing.
  • the maximum pressure in the nip is in the web direction considered first shoe press is less than or equal to about 15 bar.
  • the maximum pressure is advantageously in a range of about 2 up to about 15 bar and expediently in a range from about 2 to about 8 bar, preferably 8 bar.
  • nip line force generated by the first shoe press was less than 300 kN / m and preferably less than or equal to 150 kN / m.
  • the length of the first shoe press considered in the direction of web travel assigned press shoe is advantageously in a range of about 200 to about 350 mm.
  • the counter roll assigned to the shoe press unit of the first shoe press can be, for example, a suction roll. This can also be done with Provide blind holes and / or be grooved. Instead of a suction roller can also be a simple roller with blind holes be provided. However, the counter roller can also be a Act profile roll.
  • a second shoe press is provided behind the first shoe press, the maximum pressure in the nip of this second shoe press is about three times as large as that in the press nip of the first shoe press and is preferably in a range from about 15 bar to about 30 bar.
  • the maximum line force generated in the press nip of the second shoe press is preferably about 450 kN / m.
  • a roller press with an intermediate two rigid roll jackets are provided, with the maximum pressure in this nip in a range of about 8 to about 20 bar, especially in a range of about 8 to is about 15 bar and is preferably 10 bar.
  • the one generated during operation in the nip of the roller press Line force is advantageously in a range from about 10 to about 30 kN / m, preferably being about 20 kN / m.
  • the in the extended press nip maximum shoe press generated maximum line force especially in range from about 600 to 1200 kN / m, and preferably about Can be 800 kN / m.
  • an additional one can Press provided in the direction of web travel behind the other shoe press.
  • the press nips the further shoe press and the additional press on different Web pages are felted and that the maximum pressure in the Press nip of the additional press approximately equal to that in the press nip of the another shoe press is.
  • the additional press for example a shoe press or a simple roller press act.
  • the press nip of the first shoe press is preferably double felted.
  • a particularly advantageous embodiment variant which is preferred in practice include the machine with at least one shoe press an extended press nip in the web running direction, in which the maximum Line force is less than 150 kN / m, preferably less than 100 kN / m.
  • Such a shoe press can therefore replace a roller press be used.
  • Such a shoe press unit is for quality improvement especially in cardboard machines, but also for the production of graphic papers and for other qualities can be used.
  • Figure 1 shows a schematic representation of a through a nip guided fibrous web 10.
  • the nip is felted twice, the Fibrous web 10 is dewatered on both sides by the two felts 13. At higher drainage speeds, it can be at the Web surface to form a dense layer 12 which the further passage of water through the web surface hindered.
  • FIG. 2 schematically shows a screen belt supporting a fibrous web 10 14 shown, on one side of which the stock suspension 16 is applied and on the other side of which a differential pressure - ⁇ p is applied.
  • a differential pressure - ⁇ p is applied.
  • Formation of a dense layer 12 come.
  • the surface compaction is among others of the respective fabric, the respective basis weight and the depending on the respective dry content.
  • a machine according to the invention for producing a fibrous web which can in particular be a paper and / or cardboard web, at least two drainage zones I, II () see, for example, FIGS. 3, 4 and 8), in which the fibrous web 10 in each case increases in pressure p in the web running direction L from an initial to an end pressure p 1 , p 3 or p 2 , p 4 (see, for example, FIG.
  • Figure 3 shows a schematic representation of the pressure curve in three in Direction of web running L one behind the other drainage zones Embodiment of an inventive, for producing a fibrous web 10 serving machine.
  • L in the direction of web travel the first and the second one-sided drainage Drainage zone I or II, a further drainage zone Z is provided, in which the fibrous web 10 simultaneously to both web sides is drained.
  • the initial pressure p 3 in the second drainage zone II is significantly lower than the final pressure p 2 in the first drainage zone I.
  • the drainage takes place in the first drainage zone I upwards while in the second drainage zone II done down.
  • the initial pressure p 1 or p 3 is lower than the final pressure p2 or p 4 .
  • FIG. 3 can also be seen that the final pressure in the zone Z causing double-sided drainage is substantially equal to the initial pressure p 1 in the first zone I causing one-sided drainage.
  • the final pressure of a previous two-sided drainage can also be slightly lower than the initial pressure of the following one-sided drainage.
  • the double-sided dewatering of the fibrous web can e.g. between two Sieve belts, two felt belts and / or between a sieve and one Felt tape.
  • the fibrous web 10 acting pressure by the web train two over a curved Surface of guided bands 18, 20, which are each one Screen and / or felt belt can act.
  • the tape is 18 led directly over a roller 22 with a rigid roller shell.
  • the roller 22 or the shoe press unit can be grooved or vacuumed.
  • a sieve can run over one or more suction cups.
  • Dewatering can also be done by applying a differential pressure take place, as indicated for example in Figure 2.
  • the fibrous web 10 can pass through in at least one dewatering zone be guided at least one press nip of a mechanical press.
  • So 6 is a schematic illustration of a simple example in FIG felted gap of a shoe press shown.
  • FIG. 7 shows a schematic side view of a further exemplary embodiment one used to produce a fibrous web Machine according to the invention with several in a row in the direction of web travel lying drainage zones Z, I, II, I 'and II', the pressure curve is shown schematically in FIG.
  • the initial pressure in the one-sided drainage downward Drainage zone I ' is at least essentially the same size like the final pressure of the previous one, one-sided drainage drainage zone I which leads to the same side of the track
  • the initial pressure is one-sided drainage upwards effecting drainage zone II 'at least substantially the same great as the final pressure in the previous one, one-sided drainage to the same side of the drainage zone II.
  • the embodiment shown in FIG. 7 comprises a multilayer fibrous web a multilayer headbox 30.
  • the two screen belts 40, 34 are around a suction roller 42 led in the area of the one-sided drainage down effecting drainage zone I is formed.
  • Differential pressure is relatively high. For example, it can be around 0.6 bar lie.
  • Sucker 44 in turn has a relatively low differential pressure, which in the present case Embodiment is between about 0.1 and about 0.5 bar.
  • This suction cup 44 at the top causes one-sided drainage upwards, which, as can be seen in FIG. 8, is less than that subsequent one-sided drainage in the Area of a further suction roller 46, around which in turn both screen belts 34, 40 are performed.
  • the area of the second sucker 44 and the other Suction roller 46 is thus a correspondingly stepped pressure curve showing drainage zone II (see also Figure 8). After Suction roller 46, the two screen belts 34, 40 are separated from each other.
  • these include the press section adjoining the screen section two shoe presses 48, 50, through the two drainage zones also shown in Figure 8 I 'and II' are formed.
  • the web surface can be replaced by a high final pressure are deliberately compressed.
  • FIGS. 9 to 11 each have a schematic side view Press arrangement of a further embodiment for manufacturing a fibrous web serving machine according to the invention.
  • Each of these press assemblies include multiple shoe presses. there is the maximum pressure in the press nip in the web running direction L considers the first shoe press 52 to be less than or equal to approximately 15 bar.
  • the maximum pressure in the present case is in a range of approximately 2 to about 15 bar, where it is expedient in a range of about 2 to about 8 bar and can preferably be 8 bar.
  • the during Line force generated in the press nip of the first shoe press 52 less than 300 kN / m and preferably less than or equal to 150 kN / m.
  • the length of this shoe press considered in the web running direction L. 52 associated press shoe 54 is, for example, in a Range from about 200 to about 350 mm.
  • the shoe press comprises 52 a shoe press unit 56 and a suction roller 58
  • Shoe press 52 formed press nip A is double felted.
  • a second shoe press 60 is provided, with between the two shoe presses 52 and 60 a roller press 62 is formed, the a roller 64 and the central suction roller 58 to interpose to form the press nip B.
  • the roller 64 simultaneously forms the counter roller to a shoe press unit 66 assigned to the second shoe press 60, to form the third press nip C.
  • the suction roller 58 can additionally be provided with blind bores and / or be grooved, as shown in the embodiment of Figure 10 is.
  • the suction roll is 58 also assigned a further shoe press unit 56 'in order to work with it Suction roller 58 a further press nip extended in the web running direction to build.
  • the second shoe press 60 designed so that in the formed by this press Press gap C gives a maximum pressure which is about three times as large as the one in the first shoe press.
  • This maximum pressure in the press nip C can range, for example, from about 15 bar to about 30 bar lie.
  • the maximum line pressure can be about 450, for example kN / m.
  • first shoe press 52 following roller press 62 can be designed so that there is a lower pressure in the relevant press nip B, the maximum pressure in this press nip B in one area, for example can be from about 8 to about 15 bar.
  • the line force is, for example in a range from about 10 to about 30 kN / m, with preference is about 20 kN / m.
  • a further shoe press may be provided, wherein generated in the extended press nip of this further shoe press maximum line force e.g. in a range from about 600 to 1200 kN / m can be and is preferably about 800 kN / m.
  • the shoe press 60 having the press nip C in FIG. 9 shown embodiment may be designed accordingly.
  • the maximum pressure in the press nip A in one area is from 2 to 15 bar and is, for example, 8 bar
  • the maximum Pressure in the press nip B is in a range from 8 to 20 bar and is, for example, 10 bar
  • the maximum pressure in the press nip C is in a range from 30 to 100 bar.
  • FIG 11 differs from that of Figure 9 essentially in that in the web running direction L behind the second shoe press 60 an additional press 70, in the present case Case again a shoe press, is provided.
  • an additional press 70 in the present case Case again a shoe press.
  • the maximum pressure in that Press nip D of the additional press 70 is preferably approximately equal to that in the press nip C of the second shoe press 60.
  • the press nip A of the first shoe press 52 is double felted.
  • At least one shoe press maximum line force which is less than 150 kN / m and preferably less than 100 kN / m is to be used as a replacement for roller presses.
  • shoe press units of smaller diameter for example 600 mm can be produced, which can then also be easily used in the current Presses can be installed.
  • An appropriate shoe press can be used to improve quality especially in advance machines, but also for graphic papers and other qualities are used.

Landscapes

  • Paper (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Nonwoven Fabrics (AREA)
EP02002779A 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse Withdrawn EP1205599A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19702575 1997-01-24
DE19702575A DE19702575A1 (de) 1997-01-24 1997-01-24 Maschine zur Herstellung einer Faserstoffbahn
EP97119412A EP0857818B1 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP97119412A Division EP0857818B1 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse

Publications (2)

Publication Number Publication Date
EP1205599A2 true EP1205599A2 (fr) 2002-05-15
EP1205599A3 EP1205599A3 (fr) 2003-07-23

Family

ID=7818287

Family Applications (2)

Application Number Title Priority Date Filing Date
EP97119412A Expired - Lifetime EP0857818B1 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse
EP02002779A Withdrawn EP1205599A3 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP97119412A Expired - Lifetime EP0857818B1 (fr) 1997-01-24 1997-11-06 Machine pour la fabrication d'une bande fibreuse

Country Status (3)

Country Link
US (2) US6254728B1 (fr)
EP (2) EP0857818B1 (fr)
DE (2) DE19702575A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1739228A1 (fr) * 2005-07-01 2007-01-03 Voith Patent GmbH Machine pour fabriquer une bande fibreuse
DE102018119381A1 (de) * 2018-08-09 2020-02-13 Voith Patent Gmbh Pressanordnung
DE102018119383A1 (de) * 2018-08-09 2020-02-13 Voith Patent Gmbh Maschine und Verfahren zur Herstellung einer Wellpappenrohpapierbahn

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001036742A2 (fr) * 1999-11-17 2001-05-25 Andritz Ag Dispositif d'assechement pour bande de matiere fibreuse
AT408461B (de) * 1999-11-17 2001-12-27 Andritz Ag Maschf Vorrichtung zur entwässerung einer faserstoffbahn
DE10021320A1 (de) * 2000-05-02 2001-11-08 Voith Paper Patent Gmbh Doppelsiebformer
CZ2005617A3 (cs) * 2003-03-31 2006-02-15 Pmt Italia S. P. A. Lisovací zarízení pro odstranení vody z pásu a zpusob pro odstranení vody z pásu
DE102005020220A1 (de) * 2005-04-30 2006-11-09 Voith Patent Gmbh Langspaltpresse
DE102005020218A1 (de) * 2005-04-30 2006-11-09 Voith Patent Gmbh Langspaltpresse
DE102005020219A1 (de) * 2005-04-30 2006-11-09 Voith Patent Gmbh Langspaltpresse
US9523173B1 (en) * 2013-04-09 2016-12-20 Pmt Italia S.L.A. Press apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0289477A2 (fr) * 1987-04-28 1988-11-02 Valmet Paper Machinery Inc. Procédé pour le pressage à chaud d'une bande de papier et dispositif de séchage pour l'application du procédé
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
EP0718434A2 (fr) * 1991-12-23 1996-06-26 Valmet Corporation Section de presse d'une machine à papier, en particulier pour papier à imprimer
EP0854229A2 (fr) * 1996-12-23 1998-07-22 Voith Sulzer Papiermaschinen GmbH Machine pour la fabrication d'une bande fibreuse

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI72761C (fi) * 1981-05-15 1987-07-10 Valmet Oy Formningsparti med dubbel vira i pappersmaskin.
FI842114A (fi) * 1984-05-25 1985-11-26 Valmet Oy Pressparti med separata presszon i en pappersmaskin.
JPS61119795A (ja) * 1984-11-15 1986-06-06 三菱重工業株式会社 ツインワイヤフオ−マ
US5389205A (en) * 1990-11-23 1995-02-14 Valmet Paper Machinery, Inc. Method for dewatering of a paper web by pressing using an extended nip shoe pre-press zone on the forming wire
DE9113500U1 (de) * 1991-10-30 1991-12-19 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Vorrichtung zur mechanisch-thermischen Entwässerung einer Faserstoffbahn
US5639351A (en) * 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities
FI114227B (fi) * 1995-04-24 2004-09-15 Metso Paper Inc Paperikone, jossa on puristinosa ja kuivatusosa
DE19522462A1 (de) * 1995-06-21 1997-01-02 Voith Sulzer Papiermasch Gmbh Vorrichtung zur Entwässerung einer Faserstoffbahn
US5908536A (en) * 1995-10-03 1999-06-01 Valmet Corporation Method and machine for removing water from a paper or board web by pressing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0289477A2 (fr) * 1987-04-28 1988-11-02 Valmet Paper Machinery Inc. Procédé pour le pressage à chaud d'une bande de papier et dispositif de séchage pour l'application du procédé
EP0718434A2 (fr) * 1991-12-23 1996-06-26 Valmet Corporation Section de presse d'une machine à papier, en particulier pour papier à imprimer
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
EP0854229A2 (fr) * 1996-12-23 1998-07-22 Voith Sulzer Papiermaschinen GmbH Machine pour la fabrication d'une bande fibreuse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1739228A1 (fr) * 2005-07-01 2007-01-03 Voith Patent GmbH Machine pour fabriquer une bande fibreuse
DE102018119381A1 (de) * 2018-08-09 2020-02-13 Voith Patent Gmbh Pressanordnung
DE102018119383A1 (de) * 2018-08-09 2020-02-13 Voith Patent Gmbh Maschine und Verfahren zur Herstellung einer Wellpappenrohpapierbahn

Also Published As

Publication number Publication date
US20020124981A1 (en) 2002-09-12
US6254728B1 (en) 2001-07-03
EP0857818A3 (fr) 1999-06-09
DE19702575A1 (de) 1998-07-30
EP1205599A3 (fr) 2003-07-23
DE59710037D1 (de) 2003-06-12
EP0857818B1 (fr) 2003-05-07
EP0857818A2 (fr) 1998-08-12

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