EP1445377A1 - Calandre à pinçage allongé - Google Patents

Calandre à pinçage allongé Download PDF

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Publication number
EP1445377A1
EP1445377A1 EP03027128A EP03027128A EP1445377A1 EP 1445377 A1 EP1445377 A1 EP 1445377A1 EP 03027128 A EP03027128 A EP 03027128A EP 03027128 A EP03027128 A EP 03027128A EP 1445377 A1 EP1445377 A1 EP 1445377A1
Authority
EP
European Patent Office
Prior art keywords
fibrous web
dust
dust removal
jacket
removal device
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.)
Granted
Application number
EP03027128A
Other languages
German (de)
English (en)
Other versions
EP1445377B1 (fr
Inventor
Rüdiger Dr.-Ing. Kurtz
Josef Schneid
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 EP1445377A1 publication Critical patent/EP1445377A1/fr
Application granted granted Critical
Publication of EP1445377B1 publication Critical patent/EP1445377B1/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
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/006—Calenders; Smoothing apparatus with extended nips

Definitions

  • the invention relates to a wide nip calender with a a surrounding jacket and a pressure shoe having a shoe roller and a counter pressure element, which together form a wide nip, through which a web running path a fibrous web runs.
  • a wide nip calender is used to make a fibrous web, for example a paper or cardboard web, with increased pressure and usually also with an increased Temperature.
  • the Breitnip calender compared to a calender by two against each other acting rollers is formed, the advantage that the treatment time of the fibrous web is longer, the Compressive stresses in the wide nip are kept smaller can than in a nip between two rollers.
  • the thickness of the fibrous web is not reduced as much in the wide nip as in one Nip between two rollers.
  • the invention has for its object the quality maintain the fibrous web over a longer period of time.
  • This task is the beginning of a wide nip calender mentioned type in that at the exit of the Breitnips arranged a dust removal device is.
  • the deterioration in the quality of the fibrous web is carried out due to the fact that the relative movement or shear forces in the Breitnip particles from the surface remove the fibrous web. These particles result corresponding dust deposits on the jacket. Dust deposits on the coat lead to a change the surface of the mantle, which negatively affects the quality of the fibrous web, especially on the Quality of the surface, can impact. Furthermore there will certainly be some dust particles on the Surface of the fibrous web remain, which then deposit in downstream facilities and close there lead to increasing pollution. Pollution in downstream facilities can also cause the quality of the surface of the fibrous web decreases. With these facilities it can are, in the simplest case, deflection rollers, via which the fibrous web is guided.
  • the dust removal device is preferably between the fibrous web and the jacket arranged. you assumes that most of the dust comes from the relative movement between the fibrous web and the jacket arises. This may be because the back pressure element, usually as a roller, especially is designed as a heating roller, a smoother surface with less particles from the surface the fibrous web are detached. The most Dust therefore arises between the jacket and the fibrous web. If you look at the dust removal device Arranged here, then most of the dust will be removed become.
  • the dust removal device preferably has a Suction device on.
  • the dust removal device works according to the classic principle of one "Vacuum cleaner", in which a part of the dust that is on Output of the wide nip is present, can be suctioned off can.
  • the suction device is a a gusset between the fibrous web and the jacket has directed suction nozzle element. So you can start sucking shortly after the fibrous web detached from the coat. In this case the distance between the jacket and the fibrous web still relatively small. Accordingly, it can be assumed that the "dust density" in this area is still relative is great. By separating the fibrous web and Dust is whirled up, i.e. at least one Part of the dust is in the air where it is can be easily vacuumed.
  • the suction nozzle element preferably has one of the First wall facing the fibrous web and one facing the jacket facing second wall, with at least one Wall several suction openings are provided. This Suction openings are then directed onto a surface of where the dust can be extracted with increased intensity can.
  • a surface cleaning arrangement on the fibrous web and / or on the jacket is arranged.
  • a surface cleaning arrangement is able to remove dust, that sticks to a surface.
  • the surface cleaning arrangement has a mechanical dust removal device.
  • the mechanical dust removal device is able to loosen the dust from the surface to be cleaned. As soon as the dust is detached from the surface to be cleaned has been, for example, via the suction device be removed. Of course it is also possible to provide additional dust removal agents.
  • the dust removal device has a compressed air jet.
  • a jet of compressed air that hits the surface of the Fibrous web or is directed to the jacket able to peel off a dust deposit, so to speak. The stress on the fibrous web or the jacket stays small.
  • the dust removal device is a relative to the cleaning surface has a movable brush.
  • the brush then really brushes the fibrous web or the jacket from.
  • a brush of course, another one Element that can be used on the surface the fibrous web or the jacket is present, for example a wiping element made of a textile material.
  • the dust removal device has a suction device.
  • a suction device can together with the compressed air jet or the brush can be used. With the suction device the dust detached from other elements is removed. Under certain circumstances, however, the suction device also capable of being alone on the surface of the fibrous web or adhering to the surface of the jacket To remove dust.
  • the surface cleaning arrangement preferably has a Ionization device on. With the help of the ionization device you can get an electrostatic discharge reach the fibrous web or the roll surface, so that the holding forces of the dust on the respective Surface can be reduced.
  • the ionization device arranged in the web running direction in front of the dust removal device is. So the holding forces are first reduced between the dust and the surface to be cleaned and then removes the dust using mechanical Means.
  • a wide nip calender 1 has a shoe roller 2 a circumferential jacket 3 and a pressure shoe 4.
  • the Sheath 3 works together with a counter pressure element 5, in the present case as a roller, namely as a thermal roller, is trained.
  • the counter pressure element 5 is with a heating device, not shown, heated.
  • the shoe roller 2 is here with a relatively thick jacket 3, which rotates in the manner of a roller and usually with face washers on its faces is completed. But it is also possible to use the coat 3 run thinner and like a tape over to run several support rollers.
  • the pressure shoe 4 has a pressure surface 6, the essentially adapted to the curvature of the counter-pressure element is, of course, the thickness of the jacket 3 is taken into account must become.
  • An exact match between the curvature of the pressure surface 6 and the curvature of the counter-pressure element 5 is usually not mandatory.
  • the pressure surface 6 can devices for reducing in a manner known per se a friction between the jacket 3 and the pressure shoe 4 may be provided, for example outlet nozzles hydrostatic lubrication.
  • the jacket 3 forms together with the counter pressure element 5 a wide nip 7 through which a fibrous web 8, for example, a paper or cardboard web becomes.
  • a fibrous web 8 for example, a paper or cardboard web becomes.
  • the fibrous web 8 is increased Pressure and also at elevated temperature.
  • the treatment time of the fibrous web 8 in Breitnip 7 depends on the length of the Breitnips 7 in the direction of travel of the web, represented by an arrow 9 is.
  • exit 10 is the Wide nips 7 a dust removal device 11 arranged.
  • the dust removal device is in the opening gusset between the fibrous web 8 and the jacket 3 arranged. It is believed that Counter pressure element 5, the surface of which is much smoother than the surface of the shell 3 is less dust arises.
  • the dust removal device 11 initially has one Suction device 12, which in the opening Gusset between the fibrous web 8 and the jacket 3 is directed at the exit of the wide nip 7.
  • the suction device has a wedge-shaped suction nozzle element 13 on.
  • the suction nozzle element 13 has one of the fibrous web 8 facing first wall 14 and a jacket 3 facing wall 15.
  • There are suction openings in the first wall 16 provided.
  • the suction openings 16 suck Dust from the surface of the fibrous web 8 is "whirled up", so after leaving the Breitnips 7 is in the air at the exit of the Breitnips 10.
  • the suction openings 17 suck in a similar manner in the second wall 15 the dust coming from the surface of the jacket 3 is whirled up.
  • the surface cleaning device 18 has an ionization device 20 with which the surface of the jacket 3 is electrical can be discharged. This creates holding forces between Dust and coat 3 reduced.
  • the ionization device 20 is a mechanical dust removal device 21.
  • the dust removal device 21 is shown enlarged in Fig. 2. She assigns one circumferential brush 22. Instead of a rotating one Brush 22 you can also use a rotating roller, which is covered with a textile material, and that wipes the surface of the jacket. Behind brush 23, a suction device 23 is provided, which with Using the brush 23 from the surface of the jacket 3 loosened dust.
  • the surface cleaning device 19 also has one Ionization electrode 20, with the help of the fibrous web 8 can be discharged electrically to holding forces between the dust and the fibrous web 8 decrease.
  • the ionization device 20 is the ionization device 20 but optional, i.e. it is only used when required is.
  • the surface cleaning device 19 for the fibrous web 8 also has a mechanical removal device 24, which is shown enlarged in FIG. 3.
  • the removal device 24 has an air nozzle 25, against a sharp jet of air 26 from compressed air aligns the surface of the fibrous web 8 and thereby Dust, which lies on the surface of the fibrous web 8, peels off, in particular peels off.
  • Suction device 27 available, with the help of detached dust can be extracted.
  • the two removal devices 21, 24 are thus as Surface cleaning arrangements formed, which over extend the entire width of the fibrous web 8. The the same also applies to the suction device 12.
  • the surface will also suffice of the jacket 3 and / or the surface of the fibrous web 8 only suction, with a vacuum is built in the immediate vicinity of the surface.
  • Such a vacuum is also capable of dust mechanically detach from the respective surface. This is especially true if the surface is previously has been electrically discharged.

Landscapes

  • Paper (AREA)
  • Cleaning In General (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Prostheses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP03027128A 2003-01-22 2003-11-26 Calandre à pinçage allongé Expired - Lifetime EP1445377B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20300919U DE20300919U1 (de) 2003-01-22 2003-01-22 Breitnip-Kalander
DE20300919U 2003-01-22

Publications (2)

Publication Number Publication Date
EP1445377A1 true EP1445377A1 (fr) 2004-08-11
EP1445377B1 EP1445377B1 (fr) 2007-11-14

Family

ID=7979290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03027128A Expired - Lifetime EP1445377B1 (fr) 2003-01-22 2003-11-26 Calandre à pinçage allongé

Country Status (3)

Country Link
EP (1) EP1445377B1 (fr)
AT (1) ATE378467T1 (fr)
DE (2) DE20300919U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1772889A2 (fr) 2005-10-06 2007-04-11 LG Electronics Inc. Appareil d'affichage à plasma
CN108951264A (zh) * 2018-07-12 2018-12-07 太仓怡泰霖智能科技有限公司 一种造纸软压光机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20300919U1 (de) * 2003-01-22 2003-04-03 Voith Paper Patent GmbH, 89522 Heidenheim Breitnip-Kalander
DE102007022810A1 (de) * 2007-05-15 2008-11-20 Voith Patent Gmbh Reinigungsverfahren
FR2946501B1 (fr) * 2009-06-11 2011-08-12 Boulangerie Patisserie Felix Fabrice Dispositif de nettoyage d'une toile a couche

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1127897A (en) * 1965-03-10 1968-09-18 Kuesters Eduard Improvements in or relating to calenders
WO1997031151A1 (fr) * 1996-02-22 1997-08-28 Valmet Corporation Procede et dispositif pour une machine a papier ou equivalent, ou encore pour un dispositif de finissage du papier, permettant de recueillir et evacuer les poussieres provenant de la bande
US6148831A (en) * 1996-10-25 2000-11-21 Valmet Corporation Method for cleaning a web
US6164198A (en) * 1998-12-16 2000-12-26 Valmet Corporation Apparatus for calendering paper
DE20300919U1 (de) * 2003-01-22 2003-04-03 Voith Paper Patent GmbH, 89522 Heidenheim Breitnip-Kalander

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1127897A (en) * 1965-03-10 1968-09-18 Kuesters Eduard Improvements in or relating to calenders
WO1997031151A1 (fr) * 1996-02-22 1997-08-28 Valmet Corporation Procede et dispositif pour une machine a papier ou equivalent, ou encore pour un dispositif de finissage du papier, permettant de recueillir et evacuer les poussieres provenant de la bande
US6148831A (en) * 1996-10-25 2000-11-21 Valmet Corporation Method for cleaning a web
US6164198A (en) * 1998-12-16 2000-12-26 Valmet Corporation Apparatus for calendering paper
DE20300919U1 (de) * 2003-01-22 2003-04-03 Voith Paper Patent GmbH, 89522 Heidenheim Breitnip-Kalander

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1772889A2 (fr) 2005-10-06 2007-04-11 LG Electronics Inc. Appareil d'affichage à plasma
CN108951264A (zh) * 2018-07-12 2018-12-07 太仓怡泰霖智能科技有限公司 一种造纸软压光机

Also Published As

Publication number Publication date
EP1445377B1 (fr) 2007-11-14
DE50308594D1 (de) 2007-12-27
DE20300919U1 (de) 2003-04-03
ATE378467T1 (de) 2007-11-15

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