EP1158091A1 - Section de pressage pour une machine à papier - Google Patents

Section de pressage pour une machine à papier Download PDF

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Publication number
EP1158091A1
EP1158091A1 EP01103181A EP01103181A EP1158091A1 EP 1158091 A1 EP1158091 A1 EP 1158091A1 EP 01103181 A EP01103181 A EP 01103181A EP 01103181 A EP01103181 A EP 01103181A EP 1158091 A1 EP1158091 A1 EP 1158091A1
Authority
EP
European Patent Office
Prior art keywords
press
felt
section according
water
press section
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Withdrawn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
EP01103181A
Other languages
German (de)
English (en)
Inventor
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.)
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 EP1158091A1 publication Critical patent/EP1158091A1/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Withdrawn legal-status Critical Current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
    • D21F3/0209—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
    • 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

Definitions

  • the invention relates to a press section for pressing water out a paper web.
  • Press sections are in a variety of configurations known.
  • the invention relates to such press sections, at which there are at least two pressing points, of which at least the second press point from a so-called shoe press is formed and in which the paper web between two felts is pressed.
  • Such press sections have been in production for a long time thicker packaging paper applied. Such papers are at medium paper machine speeds. Here have the press sections mentioned have proven themselves. See weekly paper for Paper Manufacturing, No. 6, 1999; Pp. 380-385, especially Fig. 19. One can use relatively coarse felts for these packaging papers Mark paper web, but have high air permeability.
  • Dry contents are produced with press sections of the type mentioned, that are not enough.
  • the paper web is thus after leaving the Press section still relatively damp. Furthermore, the dry content of the Paper web not uniform across the web width.
  • the invention has for its object a press section according to the To design the preamble of claim 1 in such a way that it also applies to thinner Papers can be used more efficiently at higher machine speeds, especially for printing papers.
  • a press section should therefore be yours own advantages with regard to the same printability properties both sides of the web. It should also be free from disadvantages mentioned and in any case a longer felt life enable. It also addresses the problem of tearing the edges of the paper web avoid the number of suction felt guide rollers and their energy requirements, as well as lower their noise level.
  • the features 1.5 and 1.7 allow a perfect separation of the web from the upper felt as it runs out of the press point; the train follows reliably the bottom felt, what is desired.
  • Feature 1.6 is the Uniformity of drainage of the paper web according to their two Areas ensured, which is essential for printability.
  • Feature 1.8 helps to avoid rewetting the paper web through the top felt when running out of a press point.
  • the jacket of the first upper Press roll grooved or blind drilled. This creates a storage capacity created so that it depends on the storage capacity of the top felt of the first Press no longer arrives so much. This upper felt is thus in a certain Way relieved. The result is that he has other requirements can be optimized. It can now be designed so that it leaves less marks in the paper web. He can also lighter and smoother. This enables one faster and less complex installation when changing the felt.
  • top felt of the first press also applies to the same way the bottom felt, which is common to both presses, and for the top felt second press.
  • Each felt can be assigned to a specific task specialize.
  • An interesting development of the invention is the bottom felt to build from at least two layers.
  • the outer, position in contact with paper relatively little or hardly air-permeable, therefore relative dense, smooth and less compressible.
  • the inner layer is very permeable and has a high water storage capacity. This variant comes into consideration especially if of the mentioned possibility the blind hole or the grooving of the upper press roller is not used is made.
  • the press section shown in FIG. 1 has two presses with the rolls 1 and 2 and the rollers 3 and 4. Rollers 1 and 2 form one Press point N1 with each other and the rollers 3 and 4 a press point N2.
  • the Both rollers 2 and 3 are shoe press rollers.
  • a first upper felt 7 runs through the first press point N1 in the direction of the arrow from the forming wire 8 coming paper web 9, the bottom felt 10 and the Press jacket 11 of the lower press roll 2.
  • the bottom felt 10 with the paper web 9 continues to the second press point N2 and together with the second Upper felt 12 and the press jacket 13 through them.
  • the paper web 9 follows the bottom felt to the take-off roller 14 and is from this to the first dryer fabric 15 transferred to the paper web in the dryer section continues.
  • the first top felt 7 runs after the press point N1 over a suction felt guide roller 16, an external guide roller 17, a tension roller 18 and one Regulating roller 19 back to the take-off roller 20, which the paper web from Forming wire 8 decreases.
  • Take-off roller 20 is of a water collecting channel 21 with a lateral one Spout 22 surrounded. Rolls 1 and 16 spin out of paper web 9 and felt 7 coming water into a gutter 23 with lateral Outlet 27.
  • the gutter 23 is stiffened by two cross members 24 and 25. At the Cross member 25 is attached to a water scraper 26, the free water from scrapes the surface of the roller 1.
  • the water scraper 26 can also on a small distance to the surface of the roller 1 can be set, so that he is not in contact with it.
  • the outer surface of the roller 17 is cleaned by a scraper 28.
  • the Dirt accumulates in pan 29.
  • the outer surface of the felt 7 can be used for further cleaning and drainage via a pipe suction device 30 be performed. Usual for moistening and further cleaning the felt Spray pipes are not shown.
  • the bottom felt 10 runs after the press point N2 over the guide rollers 31 and 32 to the tension roller 33 and via regulating roller 34 and guide roller 35 back in the first press point N1
  • the lower press roll 2 is of a drip pan 36 with a lateral outlet 37 surrounded and press roll 4 with a drip pan 38 with lateral Outlet 39.
  • a water collecting channel 40 provided with side outlet 41. Is located above the guide roller 32 a blow pipe 42 with the air jets distributed over the width onto the The inside of the felt is blown, causing water to be thrown off is favored in the channel 40.
  • the outer surface of the roller 32 is through cleaned a scraper 43.
  • the paper web 9 can pass between the two press points N1 and N2 a steam box 44 are warmed.
  • a steam box 44 For additional Drainage of the bottom felt 10 can rinsers 45, 46 according to DGM 289 10 486.5 can be used. Loose dirt is from the outside Surface of the felt 10 removed by a scraper 47. Alternatively, you can a pipe suction device can also be used. The usual spray pipes for Humidification and cleaning of the felt are not shown.
  • the second upper felt 12 runs after the press point N2 over guide rolls 50, 51, Tensioning roller 52, regulating roller 53 and guide rollers 54, 55 back again.
  • centrifuged water is collected in the collecting pan 56 and derived laterally via processes 57 and 58.
  • a scraper 59 can additionally wipe off water from the roller jacket 13.
  • the guide roller 51 is cleaned by scraper 60.
  • the outer surface of the felt 12 can through Pipe suction 61 can be cleaned. For additional drainage of the felt 12 can serve a dishwasher 62.
  • the pressing plane P1 of the first press is around the vertical S1 inclined at an angle ⁇ of at least 20 °.
  • the press level P2 can with the Vertical S2 essentially coincide (as shown in Fig. 1), or be inclined in the running direction by a small angle ⁇ up to approximately 20 °. In In this case, the center of the roller 3 moves by the angle ⁇ right.
  • Fig. 2 is an enlarged section of the area of the press point N1.
  • the press rolls 1 and 2 the felts 7 and 10, and the Press jacket 11, which is pressed by the press shoe 5 in the direction of the roll 1.
  • blind holes 70 can be seen and in the Surface of the press casing 11 blind holes 71.
  • the one Has radius of curvature that is slightly larger than the radius R of Upper roller with axis O, followed first by a convex cylindrically curved one Area with a radius of curvature r1 with the center point O1.
  • the size r1 is in the range of 40 to 80 mm.
  • This cylindrically curved The area extends over an angle B of 2.5 to 5 °, at which an further convex cylindrical curved area of larger radius r2 connects and spans an angular range C. At the end of this Area there is a rounding r3.
  • the angle A between the connecting straight line between the Center points O and O1 and the running out felt 7 is greater than 90 °, preferably 92 to 96 °
  • the opening angle D between the two leaking felts 7 and 10 should be greater than 8 °, preferably between 10 and 20 °, so that the gusset 73 between the felt 7 and 10 of against the direction of the incoming air can be easily reached and the build-up of too high a vacuum, which leads to the flapping of the felts could be prevented.
  • the dashed circle 72 is the outline of one which can be used if necessary Edge retainer for the felt 7.
  • the edge retainer 72 is the The edge of the felt 7 is deflected into the web 7 ', so that in the gusset 73, immediately behind the separation point of the two felts 7 and 10 from the side no air can flow in here.
  • Fig. 3 is an enlarged section of the press point N2, the between Top roller 3 and bottom roller 4 is formed.
  • the two felts 10 and 12 pass through the press point N2 together with the press jacket 11 and flat on the felt 10 due to insufficient thickness overlying paper web.
  • the press shoe 6 is down against the roller 4 pressable. Both in the surface of the roller 4 and in that of Press jacket 13 blind holes 74 and 75 are incorporated, of which only a few are shown as examples.
  • An edge hold-down 76 presses the edge of the upper felt 12 behind it Separation from the bottom felt 10 against this, so that no air laterally in the gusset 77 can flow in immediately after the felt separation.
  • the Opening angle E between the running felts 10 and 12 is over 8 °, preferably between 10 and 20 °.
  • the wrap angle F between the end of the press zone and the tangential direction of the felt 12 is between 2 and 8 °.
  • Fig. 4 is a partial section through an edge region after the separation of Upper felt 7 or 12 from the lower felt 10 along the section lines IV-IV in the Figures 2 and 3.
  • Edge hold-downs 72 and 76 press the upper felts 7 and 12 on the edge down to the bottom felt, so that from the edges R the Felt forth no air can flow into the gusset 73 or 77.

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  • Paper (AREA)
EP01103181A 2000-05-08 2001-02-10 Section de pressage pour une machine à papier Withdrawn EP1158091A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10022087A DE10022087A1 (de) 2000-05-08 2000-05-08 Pressenpartie für eine Papiermaschine
DE10022087 2000-05-08

Publications (1)

Publication Number Publication Date
EP1158091A1 true EP1158091A1 (fr) 2001-11-28

Family

ID=7641000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01103181A Withdrawn EP1158091A1 (fr) 2000-05-08 2001-02-10 Section de pressage pour une machine à papier

Country Status (3)

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US (1) US6527916B2 (fr)
EP (1) EP1158091A1 (fr)
DE (1) DE10022087A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI116401B (fi) * 2000-02-22 2005-11-15 Metso Paper Inc Paperi- tai kartonkikone, jossa on muodostusosa ja puristinosa
DE10252841A1 (de) * 2002-11-13 2004-06-03 Voith Paper Patent Gmbh Pressenanordnung und Verfahren zur Entwässerung einer Faserstoffbahn, insbesondere Papierbahn
DE10330966A1 (de) * 2003-07-08 2005-01-27 Voith Paper Patent Gmbh Pressvorrichtung in einer Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn
DE10333138A1 (de) * 2003-07-22 2005-02-17 Voith Paper Patent Gmbh Pressanordnung
DE10347587A1 (de) * 2003-10-14 2005-05-19 Voith Paper Patent Gmbh Vorrichtung zur Entwässerung einer Faserstoffbahn
DE10348842A1 (de) * 2003-10-21 2005-05-25 Voith Paper Patent Gmbh Vorrichtung zur Entwässerung einer Faserstoffbahn
DE10350159A1 (de) * 2003-10-28 2005-06-02 Voith Paper Patent Gmbh Vorrichtung zur Entwässerung einer Faserstoffbahn
DE10355686A1 (de) * 2003-11-28 2005-06-23 Voith Paper Patent Gmbh Papiermaschine
US7871496B2 (en) 2003-11-28 2011-01-18 Voith Paper Patent Gmbh Paper machine
US7351307B2 (en) * 2004-01-30 2008-04-01 Voith Paper Patent Gmbh Method of dewatering a fibrous web with a press belt
DE102009047470A1 (de) * 2009-12-03 2011-06-09 Voith Patent Gmbh Vorrichtung zur Behandlung einer laufenden Papier-, Karton- oder anderen Faserstoffbahn

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3515576A1 (de) * 1984-05-25 1985-11-28 Valmet Oy, Helsinki Papiermaschinenpressenpartie mit separaten pressstellen
DE4224730C1 (en) * 1992-07-27 1993-09-02 J.M. Voith Gmbh, 89522 Heidenheim, De Tissue paper mfg. machine preventing moisture return - comprises shoe press for press unit(s) for drying tissue web, for min. press units

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1180237B (de) * 1961-01-16 1964-10-22 Karlstad Mekaniska Ab Papiermaschine
FI64959C (fi) * 1982-10-08 1984-02-10 Tamfelt Oy Ab Pressfilt foer transport av en fiberbana genom presspartiet i n pappersmaskin och foerfarande foer pressfiltens tillver knng
FI64960C (fi) * 1982-10-08 1984-02-10 Tamfelt Oy Ab Transportfilt foer papperstillverkning och foerfarande foer des tillverkning
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
US5298124A (en) * 1992-06-11 1994-03-29 Albany International Corp. Transfer belt in a press nip closed draw transfer
EP0803604B1 (fr) * 1996-04-25 2001-04-11 Voith Paper Patent GmbH Presse humide
DE29810486U1 (de) 1998-06-12 1998-08-20 Schiel, Christian, 82418 Murnau Einrichtung zur Entwässerung von Papiermaschinenfilzen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3515576A1 (de) * 1984-05-25 1985-11-28 Valmet Oy, Helsinki Papiermaschinenpressenpartie mit separaten pressstellen
DE4224730C1 (en) * 1992-07-27 1993-09-02 J.M. Voith Gmbh, 89522 Heidenheim, De Tissue paper mfg. machine preventing moisture return - comprises shoe press for press unit(s) for drying tissue web, for min. press units

Also Published As

Publication number Publication date
DE10022087A1 (de) 2001-11-22
US6527916B2 (en) 2003-03-04
US20020060050A1 (en) 2002-05-23

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