EP1992736A1 - Agencement de presse - Google Patents

Agencement de presse Download PDF

Info

Publication number: EP1992736A1
Authority: EP; European Patent Office
Prior art keywords: roll; press; fibrous web; spreader; press nip
Prior art date: 2007-05-18
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.): Granted

Application number

EP08150993A

Other languages

German (de)

English (en)

Other versions

EP1992736B1 (fr

Inventor

Thomas Gnann

Wolfgang Mayer

Franz Schuster

Roland Kurz

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 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.)

2007-05-18

Filing date

2008-02-04

Publication date

2008-11-19

2008-02-04 Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH

2008-11-19 Publication of EP1992736A1 publication Critical patent/EP1992736A1/fr

2010-04-21 Application granted granted Critical

2010-04-21 Publication of EP1992736B1 publication Critical patent/EP1992736B1/fr

Status Not-in-force legal-status Critical Current

2028-02-04 Anticipated expiration legal-status Critical

Links

239000004033 plastic Substances 0.000 claims abstract description 8
229920003023 plastic Polymers 0.000 claims abstract description 8
239000002250 absorbent Substances 0.000 abstract 1
239000002657 fibrous material Substances 0.000 abstract 1
230000000694 effects Effects 0.000 description 8
229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
238000005452 bending Methods 0.000 description 2
239000011151 fibre-reinforced plastic Substances 0.000 description 2
230000015572 biosynthetic process Effects 0.000 description 1
230000006835 compression Effects 0.000 description 1
238000007906 compression Methods 0.000 description 1
238000006073 displacement reaction Methods 0.000 description 1
239000002184 metal Substances 0.000 description 1
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
230000037303 wrinkles Effects 0.000 description 1

Images

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
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/36—Guiding mechanisms
- D21F1/40—Rolls

Definitions

the invention relates to a press arrangement for dewatering a paper, board, tissue or another fibrous web in a machine for producing and / or finishing the same, with at least one press nip through which the fibrous web is guided together with at least one water-absorbing dewatering belt.
the dewatering belts in the form of press felts are currently fed over guide rolls and a spreader roll.
Spreader rollers can compensate for the belt advance of the respective lateral edges and prevent the formation of wrinkles after a band change.
the object of the invention is therefore to improve the management of the dewatering belt with the least possible effort.
this object is achieved in that the dewatering belt before or after the press nip wraps around a spreader roll with a plastic roll jacket whose diameter is between 130 and 800 cm, with no further roll between the press nip and the spreader roll.
Spreader rolls with a roll shell made of plastic are made of DE 197 29 907 as well as the EP 1 239 169 known. It is essential that the roll shell is supported only in an axially central region on a continuous roll carrier at least in the radial direction. Outside this central region, the roll shell has a, a bending of the roll shell relative to the roll carrier permitting distance to the roll carrier.
Such spreader rolls can also be designed, in particular, in conjunction with a roll shell made of fiber-reinforced plastic with substantially small roll diameters. This in turn allows the arrangement of spreader rollers relatively close to the respective press nip, so that compared to conventional spreader rollers reduced spreading effect of these spreader rolls is compensated with plastic jacket. In addition, as often a guide roller can be omitted, since the spreader roller takes its place.
the dewatering belt should wrap around the spreader roll in a circumferential range between 90 and 180 °. This large wrap additionally improves the spreading effect of this spreader roll.
press arrangements in which the press nip is formed between a press roll wrapped by the dewatering belt and a central roll, the central roll being involved in a plurality of press nips.
the spreader roll should be arranged in front of the corresponding press nip and the dewatering belt only come into contact with the fibrous web after the spreader roll.
the spreader roller is arranged in front of the press nip and the dewatering belt comes into contact with the fibrous web only after the spreader roll.
the spreader roller is arranged after the press nip.
the dewatering belts should lead the fibrous web after the press nip to the spreader roll together and run the fibrous web after the spreader roll only with the arranged on the, the spreader roll side of the fibrous web dewatering belt.
the pulp web after the spreader roll alone leading dewatering belt should wrap around a suctioned guide roller during the routing of the other dewatering belt.
the dewatering belt leading the fibrous web after the spreader roll alone can transfer the fibrous web to an endlessly circulating belt of a following unit, for example a further press nip or a dryer group.
a spreader roll 3 looped around by a water-absorbing, endlessly circulating dewatering belt 2 is used directly before or after a press nip, with no further roll between the press nip and the spreader roll.
the spreader roll 3 has a roll shell made of a fiber-reinforced plastic, which is mounted exclusively in the axially central region on a continuous roll carrier. Outside this central region, the roll shell can bend relative to the roll carrier.
the degree of jacket bending as well as the direction thereof depends on the belt tension and the direction of action and the weight of the roll shell.
the type of effect depends on the type of deflection (convex or concave) of the looped area of this roller. In all examples, however, a spreading effect is desired.
the ends of the roll shell as in the EP 1 239 169 described, be designed with a higher weight.
the weight can but according to the DE 197 29 907 also be reduced continuously to the roll ends.
an axial displacement of the roll shell on the roll carrier according to the WO 2005/115894 can be an advantage.
the spreader roll 3 Due to the low weight, the spreader roll 3, however, remain limited in any case, even with large machine widths to diameter between 130 and 800 cm. This makes it possible to arrange the spreader roll 3 relatively close to the press nip of the dewatering belt 2, thereby replacing a guide roll.
the effect of the spreader roller 3 is substantially increased, which their use in many cases because of compared to conventional spreader rolls with metal sheath low spreading effect only makes sense.
the spreading effect is further increased by a relatively large wrap of the spreader roll 3 by the dewatering belt 2 in a circumferential range between 90 and 180 °.
the fibrous web 1 runs together with both sides of a dewatering belt 2,4 by a, formed by an upper press roller 5 and a lower counter roller 6 press nip.
the upper dewatering belt 2 of the press roll 5 wraps around the press nip a spreader roll 3 with a roll shell made of plastic. Between the press nip and the spreader roll 3, the fibrous web 1 is guided by two dewatering belts 2,4.
the fibrous web 1 only runs with the lower dewatering belt 4.
the lower dewatering belt 4 wraps around an evacuated guide roll arranged opposite the spreader roll 3 7th
the lower dewatering belt 4 transfers the fibrous web 1 to an air-permeable belt 8 of a following machine unit, which wraps around an evacuated guide roller 10 during the transfer.
Aspirated guide rollers 7,10 usually have a perforated roll shell whose interior is connected to a vacuum source.
the spreader roll is in such pressing arrangements in front of the press nip, and then between this spreader roll and the press nip nor an evacuated guide roller to support the acquisition of the fibrous web 1 is arranged.
the small dimensions and the improved stretching effect allow the use of the plastic roller spreader roll after the press nip instead of a normal guide roll.
pulp web 1 passes through only one of two press rolls 16,18 formed first press nip together with both sides each a water-absorbing drainage tape 15,17. After this first press nip, the fibrous web 1 runs together with the upper dewatering belt 15 through a second press nip formed by the upper press roll 16 and a central roll 11.
the fibrous web 1 on the roll shell of the central roll 11 adheres alone up to a third press nip, which is formed by the central roll 11 and a press roll 5 arranged above.
a third press nip which is formed by the central roll 11 and a press roll 5 arranged above.
the fibrous web 1 runs together with a dewatering belt 2 of the press roll. 5
the fibrous web 1 again adheres alone to the roll shell of the central roll 11 until it is taken over by a roll 12 which subsequently guides the fibrous web 1 through a press nip formed by this roll 12 and a further press roll 13 with lower dewatering belt 14.
press assembly passes through the fibrous web 1 together with a respective dewatering belt 2,4 a first, formed by a lower press roll 5 and an upper counter roll 6 press nip.
the upper dewatering belt 4 guides the fibrous web 1 through a second press nip which is formed between the counter-roller 16 and a press roller 19.
the roll shell of this press roll 19 then guides the fibrous web 1 through a third press nip, which is formed by the press roll 19 and an upper press roll 20 looped around by a dewatering belt 21.
the fibrous web 1 is transferred from the press roller 19 to an air-permeable belt 23 of a following in the web running direction 9 machine unit, the acquisition of one, the belt 23 looped and evacuated guide roller 22 supports.
All dewatering belts 2,4,14,15,17,21 are here designed as air-permeable and water-absorbing press felts.

Landscapes

Paper (AREA)
Treatment Of Fiber Materials (AREA)
Absorbent Articles And Supports Therefor (AREA)
Auxiliary Devices For And Details Of Packaging Control (AREA)
Press Drives And Press Lines (AREA)
Glass Compositions (AREA)

EP08150993A 2007-05-18 2008-02-04 Agencement de presse Not-in-force EP1992736B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102007023393A DE102007023393A1 (de)	2007-05-18	2007-05-18	Pressanordnung

Publications (2)

Publication Number	Publication Date
EP1992736A1 true EP1992736A1 (fr)	2008-11-19
EP1992736B1 EP1992736B1 (fr)	2010-04-21

Family

ID=39156381

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP08150993A Not-in-force EP1992736B1 (fr)	2007-05-18	2008-02-04	Agencement de presse

Country Status (3)

Country	Link
EP (1)	EP1992736B1 (fr)
AT (1)	ATE465294T1 (fr)
DE (2)	DE102007023393A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102010018272A1 (de)	2010-04-26	2011-10-27	Airbus Operations Gmbh	Schienensystem und Verfahren zur Montage einer Komponente in einem Flugzeug

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3703563A1 (de) *	1986-02-13	1987-08-20	Valmet Oy	Streckwalze oder aehnliche walze fuer papiermaschinentuecher sowie ein verfahren zur herstellung der walze
DE3729723A1 (de) *	1986-09-12	1988-03-17	Valmet Oy	Geschlossene und kompakte pressenpartie einer papiermaschine
EP0515339A1 (fr) *	1991-05-21	1992-11-25	Valmet Corporation	Système dans une section de presses d'une machine à papier pour la surveillance et le réglage de la marche des feutres pour la section de presses
DE19729907A1 (de)	1997-07-12	1999-01-14	Voith Sulzer Papiermasch Gmbh	Walze
EP1239169A1 (fr)	2001-03-09	2002-09-11	Voith Paper Patent GmbH	Cylindre muni d'une enveloppe à densité non homogène
WO2005115894A1 (fr)	2004-05-29	2005-12-08	Voith Patent Gmbh	Piece rotative

2007
- 2007-05-18 DE DE102007023393A patent/DE102007023393A1/de not_active Withdrawn
2008
- 2008-02-04 DE DE502008000546T patent/DE502008000546D1/de active Active
- 2008-02-04 AT AT08150993T patent/ATE465294T1/de active
- 2008-02-04 EP EP08150993A patent/EP1992736B1/fr not_active Not-in-force

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3703563A1 (de) *	1986-02-13	1987-08-20	Valmet Oy	Streckwalze oder aehnliche walze fuer papiermaschinentuecher sowie ein verfahren zur herstellung der walze
DE3729723A1 (de) *	1986-09-12	1988-03-17	Valmet Oy	Geschlossene und kompakte pressenpartie einer papiermaschine
EP0515339A1 (fr) *	1991-05-21	1992-11-25	Valmet Corporation	Système dans une section de presses d'une machine à papier pour la surveillance et le réglage de la marche des feutres pour la section de presses
DE19729907A1 (de)	1997-07-12	1999-01-14	Voith Sulzer Papiermasch Gmbh	Walze
EP1239169A1 (fr)	2001-03-09	2002-09-11	Voith Paper Patent GmbH	Cylindre muni d'une enveloppe à densité non homogène
WO2005115894A1 (fr)	2004-05-29	2005-12-08	Voith Patent Gmbh	Piece rotative

Also Published As

Publication number	Publication date
EP1992736B1 (fr)	2010-04-21
ATE465294T1 (de)	2010-05-15
DE502008000546D1 (de)	2010-06-02
DE102007023393A1 (de)	2008-11-20

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