EP0735182B1 - Section de presse - Google Patents

Section de presse Download PDF

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Publication number
EP0735182B1
EP0735182B1 EP96102391A EP96102391A EP0735182B1 EP 0735182 B1 EP0735182 B1 EP 0735182B1 EP 96102391 A EP96102391 A EP 96102391A EP 96102391 A EP96102391 A EP 96102391A EP 0735182 B1 EP0735182 B1 EP 0735182B1
Authority
EP
European Patent Office
Prior art keywords
press
belt
suction
web
downstream
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.)
Expired - Lifetime
Application number
EP96102391A
Other languages
German (de)
English (en)
Other versions
EP0735182A2 (fr
EP0735182A3 (fr
Inventor
Herbert Kotitschke
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 EP0735182A2 publication Critical patent/EP0735182A2/fr
Publication of EP0735182A3 publication Critical patent/EP0735182A3/fr
Application granted granted Critical
Publication of EP0735182B1 publication Critical patent/EP0735182B1/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
    • D21F3/04—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
    • D21F3/04—Arrangements thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine

Definitions

  • the invention relates to a press section for a machine for Production of a fibrous web, in particular paper or Cardboard web, in particular with those in the preamble of claim 1 specified features.
  • the transfer area between the press unit (which is the can be a single press unit or one of several press units) and the downstream unit with problems.
  • the transfer area should be designed in such a way that the paper web in the press unit is optimally dewatered becomes. Of course, this is the most important function of a Press section.
  • the paper machine after the transfer strip has come to a standstill or the Paper web in full width
  • these two demands could not be met simultaneously be satisfactorily fulfilled.
  • With a double-felted Press unit runs the paper web together with the top felt and the bottom felt through the press nip of the press unit.
  • the two felt belts take water from the paper web in the press nip on.
  • the press pressure naturally hears on.
  • the two Felt tapes flow back to the paper web, so that this is rewetted.
  • the two should Felt tapes as soon as possible after passing through the press nip be separated from the paper web.
  • a common uncertainty factor when changing the paper web from the transfer belt to the acceptance belt is the quality and the the time-changing state of the endless tapes, especially when it is are felts.
  • felts whose Structure is chosen so that it is primarily for transporting the train own. It often happens that the web at the bottom the felt must hang, supported by the adhesive forces of the relatively wet web on the moistened outside of the felt. In this case, this is designed such that it is in its pores contains a relatively large amount of water.
  • felts that are primary are designed to ensure that the dewatering performance of the press is increased. Such felts are constructed in such a way that they are made of absorb a lot of water from the paper web and inside (i.e.
  • the invention is therefore based on the object Press section, which the features of the preamble of the claim 1 has to be designed such that not only the highest possible Drainage capacity of the press unit is present, but that in particular, a high running efficiency is ensured. In particular, the transfer of the paper web from the Press unit to the downstream unit as far as possible take place without interference.
  • the machine operator can - by swiveling the above movable deflection roller - ensure that the transfer belt such is performed that it behind the non-suctionable guide remains in contact with the take-off belt to form a suction element.
  • This will - regardless of the quality and / or current condition of the tapes - a reliable transfer of the Paper web guaranteed on the take-off belt.
  • Mode of operation II i.e. jointly passing the transfer belt and Take-off belt up to the suction element
  • Mode of operation I i.e. jointly passing the transfer belt and Take-off belt up to the suction element
  • the transfer belt has the primary function of a conveyor belt, ie only serves as a drainage belt in a second line. This is the case, for example, when the transfer belt must first remove the paper web from the wire section and then pass it through the press unit.
  • mode II from the outset, namely to achieve the highest possible running efficiency of the paper machine.
  • a third mode of operation can also be used, in which the movable deflecting roller is adjusted into a position such that the transfer belt is permanently out of contact with the removal belt. In this case, the paper web must run over a free paper draw from the transfer belt to the take-off belt during normal continuous operation.
  • FIGS. 1 to 5 shows a press section according to the invention, or part of it, in a schematic side view.
  • Fig. 1 Shown in Fig. 1 is a press unit, formed by a normal press roll 1 and by a shoe press roll with press shoe 2 and press belt 3. Both rollers form a press nip with one another, through the one invisible paper web together with two Felt ribbons 4 and 5 runs through.
  • the upper felt belt 4 transports the paper web in a known manner Way from a wire section into the press section; here comes the Paper web in the area of a guide roller 6 with the lower felt belt 5 in contact. Separates immediately at the exit from the press nip the upper felt belt 4 from the paper web and runs over a Guide roller 7 and over other invisible guide rollers back to Wire section.
  • the paper web runs together with the lower felt belt or "transfer belt” 5 to a transfer point, which in as possible short distance from the outlet from the press nip is arranged.
  • the transfer point is formed by a take-off roller 8a at which a take-off belt 14 comes into contact with the paper web.
  • Fig. 1 (and in Fig. 2) is one with dash-dotted lines further position 10 "of the deflection roller 10 is shown, in which the both bands 5 and 14 remain without contact. That position is advantageous e.g. when the press section is idling, or when one the two press units stand still or with another Working speed than the other press unit is running. This However, as explained above, position is also in special cases applicable in normal continuous operation, e.g. in the manufacture of wet strength paper webs. The invention is in the same way realized in the second press unit 11-20 or FIG. 1.
  • the transfer belt 5 is not the lower one but that upper felt belt of the first press unit 1, 2, 3.
  • the transfer belt 5 serves as a take-off belt; because it takes the paper web in a known manner by means of a take-off suction roller 5A from the wire section; of this is only a small piece of the Sieve belt S shown.
  • the paper web hangs on the underside of the transfer belt 5; the same applies when the paper web runs out together with the Transfer belt from the press unit 1-3.
  • FIG. 2 press belts 3 'and 13' respectively circulate over several guide rollers.
  • FIG. 2 Schuzpreßwalzen arrangement according to Fig. 1 possible.
  • the paper web runs in a short free paper draw from the press roller 11 to one Transfer sieve or transfer felt 24, which, inter alia, has a Guide roller 25 and runs over a first drying cylinder 28.
  • the paper web is transferred to a dryer fabric 27 which runs over a guide roller 26 to the drying cylinder 28 and then the Paper web in a known manner over the other, not shown Drying cylinder leads.
  • the guide roller 25 can by a roller arrangement similar to 8a / 8b / 10 (10 '/ 10 ").
  • the drying cylinder 28 can be replaced by a normal guide roller.
  • the Transfer point of the web to the dryer fabric 27 can also behind the Cylinder 28 or be arranged behind the normal guide roller.
  • FIG. 3 shows a modification to FIG. 1 or FIG. 2.
  • a stationary suction pad 30 provided with a convex curved guide surface for the take-off belt 14.
  • This Guide surface comprises a non-absorbable portion 30a, which in the smallest possible distance from the press unit 1-3 and a subsequent suction zone 30b.
  • FIG. 5 is, as in FIG. 1 or FIG. 2, a non-suctionable Guide roller 8a provided and instead of the suction roller 8b of FIG. 1st 2 shows a stationary suction shoe 38. Not shown a further possibility, namely the roller 8a of FIG. 1 or FIG. 2 to be replaced by a stationary shoe and the suction guide roller 8b to maintain.

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  • Paper (AREA)

Claims (8)

  1. Section de presses pour une machine de fabrication d'une nappe de matière fibreuse (par exemple une nappe de papier ou de carton), comprenant au moins une unité de presse, ainsi qu'un ensemble placé après l'unité de presse, par exemple une deuxième unité de presse ou une section sèche, comprenant les caractéristiques suivantes :
    1.1 l'unité de presse comprend deux organes de presse, par exemple deux cylindres, ou un cylindre (1) et un sabot de presse (2) avec une bande de presse (3 ou 3'), qui forment chacune une ligne de contact ;
    1.2 les deux organes de presse (1; 2, 3 ou 3') sont chacun entourés par une bande (tamis à bande ou bande de feutre) (par exemple la bande de feutre supérieure 4 et la bande de feutre inférieure 5) ;
    1.3 un cylindre déflecteur (10), sur lequel passe l'une des bandes ("bande de transfert" 5) derrière la ligne de contact, est mobile, c'est-à-dire que sa position peut être modifiée, par exemple qu'il est monté pivotant.
    1.4 la bande de transfert (5) transporte la nappe depuis la ligne de contact jusqu'à une "bande d'enlèvement" (par exemple le tamis à bande ou la bande de feutre 14) de l'ensemble monté après, la bande d'enlèvement passant au niveau du point de transfert par-dessus un dispositif d'enlèvement (8) ;
    caractérisée par les caractéristiques supplémentaires suivantes :
    1.5 le dispositif d'enlèvement (8) comprend un élément conducteur (8a) non aspirable et un élément d'aspiration (8b) monté derrière celui-ci ;
    1.6 la position du cylindre déflecteur (10) est modifiable de telle sorte que la bande de transfert
       (5) vienne en contact avec la bande d'enlèvement (14) soit seulement contre l'élément conducteur (8a) non aspirable soit successivement contre l'élément conducteur (8a) non aspirable et l'élément d'aspiration (8b).
  2. Section de presses selon la revendication 1, caractérisée en ce que l'élément conducteur non aspirable est disposé à une distance aussi courte que possible après la ligne de contact, de sorte que la bande d'enlèvement (14) vienne en contact avec la nappe aussi tôt que possible du point de vue physique derrière la ligne de contact.
  3. Section de presses selon la revendication 1 ou 2, caractérisée en ce que la position du cylindre déflecteur (10) est modifiable de telle sorte que la bande de transfert vienne en contact avec la bande d'enlèvement (14)
    (a) seulement contre l'élément conducteur non aspirable (8a) pendant le fonctionnement durable normal,
    (b) au contraire pendant le chargement de la nappe dans la section de presses, aussi bien contre l'élément conducteur non aspirable (8a) que contre l'élément d'aspiration (8b).
  4. Section de presses selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le cylindre déflecteur mobile (10) peut être déplacé dans une position supplémentaire (10''), de sorte que la bande de transfert (5) ne soit pas en contact avec la bande d'enlèvement (14).
  5. Section de presses selon l'une quelconque des revendications 1 à 4, caractérisée par les caractéristiques suivantes :
    5.1 l'élément conducteur non aspirable (8a) est un cylindre conducteur ou un sabot conducteur stationnaire,
    5.2 l'élément d'aspiration (8b) est un cylindre d'aspiration ou un sabot d'aspiration stationnaire (38).
  6. Section de presses selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'élément conducteur non aspirable (30a) et l'élément d'aspiration (30b) forment un sabot conducteur d'aspiration unitaire (30).
  7. Section de presses selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'élément conducteur non aspirable (40a) et l'élément d'aspiration (40b) sont assemblés pour former un cylindre d'aspiration conducteur (40).
  8. Section de presses selon l'une quelconque des revendications 1 à 7, caractérisée en ce que derrière l'unité de presse (1 à 10) est prévue une deuxième unité de presse (11-20) qui présente les caractéristiques de l'une quelconque des revendications 1 à 7.
EP96102391A 1995-03-31 1996-03-01 Section de presse Expired - Lifetime EP0735182B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511988 1995-03-31
DE19511988A DE19511988C1 (de) 1995-03-31 1995-03-31 Pressenpartie für eine Papiermaschine

Publications (3)

Publication Number Publication Date
EP0735182A2 EP0735182A2 (fr) 1996-10-02
EP0735182A3 EP0735182A3 (fr) 1998-01-21
EP0735182B1 true EP0735182B1 (fr) 2001-05-09

Family

ID=7758355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96102391A Expired - Lifetime EP0735182B1 (fr) 1995-03-31 1996-03-01 Section de presse

Country Status (2)

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EP (1) EP0735182B1 (fr)
DE (2) DE19511988C1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19815994A1 (de) * 1998-04-09 1999-10-14 Voith Sulzer Papiertech Patent Übergabe einer Faserstoffbahn
US6261415B1 (en) 1998-08-28 2001-07-17 Valmet Karlstad Ab Paper machine
WO2000071812A1 (fr) * 1999-05-21 2000-11-30 Valmet-Karlstad Ab Section de presse dotée d'un dispositif stabilisateur de bande
WO2000071813A1 (fr) * 1999-05-21 2000-11-30 Valmet-Karlstad Ab Section de presse dotée d'un dispositif stabilisateur de bande
EP1101864B1 (fr) * 1999-11-16 2005-03-02 Voith Paper Patent GmbH Procédé pour transferer une bande fibreuse
DE10015357A1 (de) * 2000-03-28 2001-10-04 Voith Paper Patent Gmbh Bahnabnahmeanordnung
DE10022605A1 (de) * 2000-05-09 2001-11-15 Voith Paper Patent Gmbh Pressenpartie
DE10116364A1 (de) * 2001-04-02 2002-10-10 Voith Paper Patent Gmbh Saugelement
DE102016201333A1 (de) * 2016-01-29 2017-08-03 Voith Patent Gmbh Pressenpartie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4026021C2 (de) * 1990-08-17 1995-10-12 Voith Gmbh J M Pressenpartie einer Papiermaschine
EP0598991B1 (fr) * 1992-11-24 1996-01-17 J.M. Voith GmbH Section de presse pour une machine à papier

Also Published As

Publication number Publication date
EP0735182A2 (fr) 1996-10-02
EP0735182A3 (fr) 1998-01-21
DE59606858D1 (de) 2001-06-13
DE19511988C1 (de) 1996-08-01

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