+

WO1998038382A1 - Procede et dispositif pour engager le papier dans une calandre - Google Patents

Procede et dispositif pour engager le papier dans une calandre Download PDF

Info

Publication number
WO1998038382A1
WO1998038382A1 PCT/FI1998/000163 FI9800163W WO9838382A1 WO 1998038382 A1 WO1998038382 A1 WO 1998038382A1 FI 9800163 W FI9800163 W FI 9800163W WO 9838382 A1 WO9838382 A1 WO 9838382A1
Authority
WO
WIPO (PCT)
Prior art keywords
tail
guide surface
calender
nip
roll
Prior art date
Application number
PCT/FI1998/000163
Other languages
English (en)
Finnish (fi)
Inventor
Hannu Hanhikoski
Original Assignee
Valmet Corporation
Vuorimies, Timo
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 Valmet Corporation, Vuorimies, Timo filed Critical Valmet Corporation
Priority to DE19882133T priority Critical patent/DE19882133T1/de
Priority to AU61015/98A priority patent/AU6101598A/en
Publication of WO1998038382A1 publication Critical patent/WO1998038382A1/fr

Links

Classifications

    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/0073—Accessories for calenders
    • D21G1/0086—Web feeding or guiding devices

Definitions

  • the invention relates to a method in a calender in threading of paper which is presented in the preamble of the appended claim 1.
  • the in- vention also relates to a device for implementing the threading, which is of the type according to the preamble of the appended claim 6.
  • the invention relates particularly to threading in connection with a calender having the supercalender type geometry, wherein the tail is passed between the calender rolls superimposed in a stack and through take-out leader rolls outside the stack.
  • rope transfer systems In threading of paper web through calenders of this type, rope transfer systems are generally used, in which the tail is guided between threading ropes arranged at the ends of the rolls. At the same time, the tail has to be pulled aside from the primary path of the paper web.
  • the object of the invention is to present a method and a device, whereby it is possible for the tail to be passed between mantle surfaces of the rolls in the stack of calender rolls without rope systems.
  • the method according to the invention is primarily characterized in what is presented in the characterizing part of the appended claim 1.
  • the device for implementing the invention is, for its part, characterized in what will be presented in the characterizing part of the appended claim 6.
  • the device comprises air guide surfaces, blow nozzles ar- ranged in connection with them, a suction area arranged inside the take-out leader roll, and means for moving the calender rolls apart from each other during their drive.
  • the air guide surfaces of the device are structures separate from calender rolls and take-out leader rolls, and they can easily be e.g. pulled out from the calender after threading has been completed and a full-width paper web is run through the calender.
  • the calender presented in the drawing is an on-machine calender, in which, according to principles known as such, a paper web running from a drying section in the direction of arrow A is calendered by leading it through nips N between the superimposed calender rolls 1 along a winding path.
  • the paper web is first guided to the upper end of the stack of calender rolls into the nip N between the two uppermost rolls 1. Between two successive nips N, which are on the opposite sides of the same calender roll 1 , the paper web is passed through a take-out leader roll 2 adjacent to the said roll 1.
  • the drawing presents a calender structure comprising four calender rolls 1 , three nips N, and correspondingly two take-out leader rolls 2, but it is obvious that the invention is applicable for use in all calenders of similar type, regardless of the number of calender rolls/nips/take-out leader rolls.
  • the surface structure of the calender rolls 1 is also unimportant, and it can consist of materials generally known in the art.
  • the paper web runs onwards toward the reel-up (arrow B).
  • the path of the tail T separated from the edge of the paper web before calendering and having typically a width of 15-50 cm is illustrated with a broken line in the drawing. This approximates the future path of the paper web -after the web has been cut into full width with a diagonal cutter.
  • the calender rolls are separated from each other, i.e. they are vertically moved in the calender frame with respect to each other.
  • the nips N are opened to form a few millimeters wide slots between the mantle surfaces of the calender rolls 1.
  • the rolls 1 are apart from each other, they can all be driven, as well as the take-out leader rolls 2 can be driven, i.e. rotated as shown by arrows.
  • the speed of the rolls is thus preferably in accordance with the threading speed.
  • an air guide surface 3 is arranged before the nip and directed approximately in parallel direction with the path of travel of the paper web toward the nip N, and as close to it as possible .
  • a blow nozzle 3a is arranged, an extension to which is at least part of the air guide surface 3 as far as to the nip N.
  • the blow nozzle can be a wide nozzle slot or it can be composed of a series of adjacent narrower nozzles, and common to all of these alternatives is, that the nozzle brings about a Coanda effect, wherein the thin, wide air jet discharged from the nozzle starts to follow the subsequent guide surface 3, and produces a reduced pressure air cushion, which, between the guide surface 3 and the tail T, directs the latter toward the nip N.
  • this air guide surface 3 can be seen as an extension to the air guide surface before the nip N, and to stabilize the travel of the tail T after the nip, a separate blow nozzle 3a is also arranged in connection with this surface in order to bring about a corresponding effect.
  • a suction zone 2a is arranged in a sector of suitable size.
  • the sector is located on the side of the take-out leader roll ' 2 away from the adjacent calender roll 1 , in other words in the area, where the paper web is intented to wind around the mantle of the take-out leader roll 2 by changing its direction.
  • the tail T travels by means of the suction against the mantle of the roll 2, past this area in which a turn of almost 180°, typically 160-170°, occurs in its travel.
  • the suction is effective in the sector of the suction zone 2a on the mantle of the take-out leader roll at a suitable width through orifices made in the vicinity of its end in order to pull the tail T against the mantle.
  • the suction zone 2a ends at the point where the tail T is desired to dis- engage from the take-out leader roll 2. This point is located before the area of the roll in which the joint tangent of the take-out leader roll 2 and the adjacent calender roll 1 touches the take-out leader roll.
  • the suction zone is immediately followed by a pressure zone 2b which has the size of a certain sector, is arranged inside the roll and produces a blow through the aforementioned orifices extending through the mantle of the roll. The blow detaches the tail from the mantle of the roll.
  • the tail T is directed toward the next nip N by means of the air guide surface 3 located after the suction zone 2b.
  • the air guide surface is directed from the vicinity of the mantle of the take-out leader roll toward the nip N and starts from a similar air nozzle 3a, the function of which is already described above.
  • the principles for guiding the tail T via the take-out leader roll 2 located on the other side of the stack of calender rolls are the same, in other words the location of the parts is symmetrical with respect to the vertical center line of the stack of calender rolls.
  • blow nozzle 3a is required for leading through one open nip N, in this case advantageously one located before the nip N, especially if the air guide surface 3 after the nip N and the air guide surface 3 before the nip N are arrange ' d as so direct extensions to each other as possible, and they are brought as close to the nip as possible.
  • a blow nozzle 3 after the nip N is, however, advantageous.
  • a pressure zone 2b is not necessary, if the air guide surface 3 after the suction zone 2a has enough capacity to carry along the tail T. Replacing the nozzles with mere air guide surfaces depends on the stiffness of the paper web and corresponding properties of the tail.
  • the travel of the tail T can be primarily mechanically secured by means of the guide surface 4 which is located opposite to the primary air guide surface 3, and which, together with the air guide surface 3, forms a narrow passage, along which the tail T travels.
  • the first guide surface 4 is arranged before the first nip N, and, at the same time, the guide surface 4 following the nip constitutes a curved protective surface at the take-out leader roll 2 at the location of the suction zone 2a.
  • This surface ends in the blow nozzle 3a, from which the primary air guide surface 3 begins, opposite of which is the guide surface 4 forming the passage between the takeout leader roll 2 and the calender roll 1.
  • the corresponding structures are at the location of the next take-out leader roll 2 which is situated on the opposite side.
  • the aforementioned guide surfaces can be implemented with laminar guide plates, located on one edge in cross machine direction and having a particular width, for example the width of the tail T or somewhat wider than that, i.e. in practice on the other side of the longitudinal center line of the machine, in that area in the transverse direction in which the threading takes place.
  • the suction zones and pressure zones inside the take-out leader rolls 2 can, in the direction of the axis of the roll, correspondingly extend over a section of the machine width in the edge on the tail side. It is, however, possible to use the aforementioned structures and the nozzles connected with them, as well as the zones of the take-out leader roll in a wider area, wherein they would also function during diagonal cutting.
  • the operation can be applied to a full-width web, wherein all the threading means have the width of the whole web.
  • Guide plates or corresponding air guide surfaces and the nozzles con- nected with them can be placed in a stationary manner in connection with the calender, or they can be arranged movable with respect to it either to a longer distance from the web or, in the cross machine direction, completely outside the web.
  • the plates and nozzles can thus be assembled also in the same structure which can be moved as a unit, wherein for example at the location of the take-out leader roll 2, at least the guide surface 4 located after the nip N and curvedly covering in its end the mantle of the take-out leader roll 2, the blow nozzle 3a and the following air guide surface 3 directed from the roll to the nip N can form such a structure, which in the drawing is marked with the ref- erence number 5.
  • the structures required by the guide surfaces 3,4 and the blow nozzles 3a can be arranged, for example, in the calender frame which supports the calender rolls 1 , in a suitable way to be movable between the threading position and the position located further from the rolls by means of normal actuator solutions, which bring about the transfer of the aforementioned structures to desired directions.
  • blow nozzles 3a and the guide surfaces 3 are situated below the path of the tail T, they can also be located above the same, and thus the locations of the guide surfaces 3 and 4 can be reversed.
  • a suction zone 2a and a pressure zone 2b can be arranged by means known as such, for example with the help of arrangements used in drying sections in connection with the wire guide rolls.
  • two conduits are brought from the air blower, one of which, leading to the suction zone 2a, is connected to the suction side of the blower, and the other, leading to the pressure zone 2b, is connected to its pressure side.
  • the width of the suction and pressure zone can vary at the end of the roll, and, in a specific case, it can also extend over the full width f-the roll.
  • the mantles of the calender rolls 1 are separated from each other and the rolls are driven, the guiding means of the threading are transferred into working positions, and the guiding blows from the nozzles as well as the pressures in the suction and blow zones of the rolls are set on. After this, the tail is directed to the calender and threading is implemented as described above.
  • the paper web is widened into a full web width by means of the diagonal cutter located before the calender, suctions and blows are set off, the guide surfaces 3 and 4 are transferred, if necessary, further away from nips N and the nips N are closed.
  • the nips can be closed in an optimal order with respect to the travel of the paper web.
  • the means for separating calender rolls 1 from each other and transferring them into connection with each other can be actuators typically used in calenders.

Landscapes

  • Paper (AREA)

Abstract

Selon un procédé permettant d'engager le papier dans une calandre, une pointe étroite (T) séparée d'une bande de papier large passe entre des rouleaux de calandrage superposés (1) de la calandre. Durant l'engagement, les espaces (N) entre les cylindres (1) sont maintenus ouverts, et la pointe (T) est guidée, de façon à passer dans lesdits espaces (N) entre les surfaces de manteau opposées des cylindres (1), par de l'air soufflé dans une direction parallèle aux surfaces de guidage de l'air (3) suivant le trajet de la bande. La pointe (T) est aspirée contre le manteau du cylindre meneur de sortie (2) séparant les espaces (N) par une zone d'aspiration (2b) située à l'intérieur du cylindre.
PCT/FI1998/000163 1997-02-28 1998-02-25 Procede et dispositif pour engager le papier dans une calandre WO1998038382A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19882133T DE19882133T1 (de) 1997-02-28 1998-02-25 Verfahren und Vorrichtung für den Papiereinzug in Kalandern
AU61015/98A AU6101598A (en) 1997-02-28 1998-02-25 Method and device in calender in threading of paper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI970854 1997-02-28
FI970854A FI101634B1 (fi) 1997-02-28 1997-02-28 Menetelmä ja laite kalanterissa paperin päänviennissä

Publications (1)

Publication Number Publication Date
WO1998038382A1 true WO1998038382A1 (fr) 1998-09-03

Family

ID=8548301

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1998/000163 WO1998038382A1 (fr) 1997-02-28 1998-02-25 Procede et dispositif pour engager le papier dans une calandre

Country Status (4)

Country Link
AU (1) AU6101598A (fr)
DE (1) DE19882133T1 (fr)
FI (1) FI101634B1 (fr)
WO (1) WO1998038382A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6235156B1 (en) 1999-06-03 2001-05-22 Valmet Corporation Method for paper web transfer and transfer apparatus for paper web
WO2001042118A3 (fr) * 1999-12-09 2001-11-22 Metso Paper Inc Procede d'engagement d'une bande de papier
EP1225264A1 (fr) * 2001-01-19 2002-07-24 F.O.R. ING. GRAZIANO S.p.A. Appareil de production de nontissé lié thermiquement par calandrage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI121079B (fi) 2002-05-28 2010-06-30 Metso Paper Inc Menetelmä ja laitteisto köydettömässä päänviennissä jälkikäsittelylaitteella
DE10322525A1 (de) * 2003-05-19 2004-12-09 Voith Paper Patent Gmbh Bahnführungseinrichtung
DE10322518A1 (de) * 2003-05-19 2004-12-09 Voith Paper Patent Gmbh Bahnführungseinrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775777A2 (fr) * 1995-11-21 1997-05-28 Voith Sulzer Finishing GmbH Calandre pour machine à papier ou machine de couchage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775777A2 (fr) * 1995-11-21 1997-05-28 Voith Sulzer Finishing GmbH Calandre pour machine à papier ou machine de couchage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6235156B1 (en) 1999-06-03 2001-05-22 Valmet Corporation Method for paper web transfer and transfer apparatus for paper web
WO2001042118A3 (fr) * 1999-12-09 2001-11-22 Metso Paper Inc Procede d'engagement d'une bande de papier
EP1225264A1 (fr) * 2001-01-19 2002-07-24 F.O.R. ING. GRAZIANO S.p.A. Appareil de production de nontissé lié thermiquement par calandrage

Also Published As

Publication number Publication date
FI101634B (fi) 1998-07-31
DE19882133T1 (de) 2000-03-30
FI101634B1 (fi) 1998-07-31
AU6101598A (en) 1998-09-18
FI970854A0 (fi) 1997-02-28

Similar Documents

Publication Publication Date Title
KR100291961B1 (ko) 웹 건조 장치
EP1194641B1 (fr) Procede et appareil concernant la section sechage d'une machine a papier ou equivalent
KR960012521B1 (ko) 웹 건조 장치
US4551203A (en) Method and arrangement for guiding a paper web from the press section to the drying section
US5784955A (en) Calender in a paper-making or a coating machine
JPH07173788A (ja) 乾燥セクション
US6474589B1 (en) Change device of a reel-up and method for changing a roll
EP1012387B1 (fr) Section de sechage d'une machine a papier et procede d'etancheification d'une zone de sous-pression dans une poche dans une section de sechage d'une machine a papier
US6972073B2 (en) Method for conveying and guiding a lead-in strip of a web in a paper machine
US5438765A (en) Method and apparatus for eliminating the flutter of a paper web in the dryer section of a papermaking machine between two single felt configurations therein
JP2851369B2 (ja) 抄紙機の乾燥部において使用するウエブの通紙を補強するための方法および装置
EP1012385B1 (fr) Machine a papier ou carton avec au moins une unite de sechage pour secher une bande de papier ou de carton
WO1998038382A1 (fr) Procede et dispositif pour engager le papier dans une calandre
CA2040507A1 (fr) Dispositif permettant la separation de la bande de papier et de la courroie transporteuse dans la partie seche d'une machine a papier
JP3518867B2 (ja) 紙ウェブコーティングライン用組立体
US6413374B1 (en) Threading device and method for threading the tail of the web
US5475934A (en) Method and device for ensuring the run of the web in the multi-cylinder dryer of a papermachine
US6662468B2 (en) Dryer section of a paper or board machine
US5832626A (en) Single felt dryer group
US6918996B2 (en) Method and apparatus in ropeless tail threading in a multi-roll calender
EP1070169B1 (fr) Procede d'engagement de pointe et dispositif de finissage pour papier
CA2427591C (fr) Dispositif d'entrainement et de guidage de l'amorce de bande dans une machine a papier
US20080178487A1 (en) Arrangement in connection with the press and dryer section of a web forming machine

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AT AU AZ BA BB BG BR BY CA CH CN CU CZ CZ DE DE DK DK EE EE ES FI FI GB GE GH GM GW HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT UA UG US UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref document number: 1998537343

Country of ref document: JP

RET De translation (de og part 6b)

Ref document number: 19882133

Country of ref document: DE

Date of ref document: 20000330

WWE Wipo information: entry into national phase

Ref document number: 19882133

Country of ref document: DE

122 Ep: pct application non-entry in european phase
REG Reference to national code

Ref country code: DE

Ref legal event code: 8607

REG Reference to national code

Ref country code: DE

Ref legal event code: 8607

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载