EP0775777A2 - Calandre pour machine à papier ou machine de couchage - Google Patents

Calandre pour machine à papier ou machine de couchage Download PDF

Info

Publication number
EP0775777A2
EP0775777A2 EP96117572A EP96117572A EP0775777A2 EP 0775777 A2 EP0775777 A2 EP 0775777A2 EP 96117572 A EP96117572 A EP 96117572A EP 96117572 A EP96117572 A EP 96117572A EP 0775777 A2 EP0775777 A2 EP 0775777A2
Authority
EP
European Patent Office
Prior art keywords
calender
paper
rollers
insertion strip
elastic
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
EP96117572A
Other languages
German (de)
English (en)
Other versions
EP0775777B1 (fr
EP0775777A3 (fr
Inventor
Hans-Rolf Conrad
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 Paper GmbH and Co KG
Original Assignee
Voith Sulzer Finishing 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 Sulzer Finishing GmbH filed Critical Voith Sulzer Finishing GmbH
Publication of EP0775777A2 publication Critical patent/EP0775777A2/fr
Publication of EP0775777A3 publication Critical patent/EP0775777A3/fr
Application granted granted Critical
Publication of EP0775777B1 publication Critical patent/EP0775777B1/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

Definitions

  • the invention relates to a calender for treating a paper web, which is arranged within the paper or coating machine, ie in-line.
  • Soft calenders are known to numerous paper production specialists from numerous publications.
  • the calenders which consist of a hard, heated cast iron or steel roll and one or two elastic rolls, which form one or two nips with the hard roll, can stand inside the paper or coating machine.
  • these calenders can only be used with papers that are easy to satin, such as newsprint.
  • the paper produced in the paper machine is therefore satinized before the first winding.
  • super calenders are used for calendering. These stand outside the paper machine and consist of a larger stack of rollers arranged one above the other.
  • This type of calender which also has hard, heated rolls and elastically covered rolls, precedes a roll unwind, one of which is wound up after the paper machine unsatized paper web is guided through the 8 to 13 nips of the supercalender until it is rewound.
  • at least 40% of the rolls have an elastic cover or covering. Because the supercalender has a lot more nips than a soft calender, a greater amount of deformation work can be applied to the paper web, which, for example, ensures high gloss and smoothness values of the paper web.
  • the object of the invention is to make a calender suitable for producing high quality paper for operation within a paper or coating machine.
  • One or two nips are not enough to satin high-quality papers. It was recognized that at least four nips are also required within the paper or coating machine for a satisfactory satin finish. This means that at least five rollers must be used one above the other.
  • At least the middle roller bearings should be connected to the calender frame via levers.
  • the middle roller bearings are understood to mean all calender roller bearings with the exception of those of the top or bottom roller.
  • the paper web is inserted with the nips open. These are opened by a separation device known from the supercalender. This is often done by lowering the lower roller and pushing the levers of the middle rollers against an underlying stop. The travel of the levers is adjusted in such a way that roll gaps of 5 to 10 mm are set.
  • a hydraulic cylinder is usually used which lifts the lower roller and subsequently the other middle rollers until all the gaps are closed.
  • a separate drive is used for each roller, which brings the peripheral speed of the respective roller to web speed. This prevents the paper web from tearing when the nips are closed.
  • the heated rollers must be designed so that good heat transfer from a heating medium to the paper web can take place. Because uniform heating of the paper web is essential for the calendering process. The best and most uniform heat transfer across the roller width by convection from a heat transfer medium water vapor is available on the inside of the roll, which is also available in sufficient quantities in every paper mill.
  • the heating rollers can also be provided with peripheral bores through which the steam is passed. In order to achieve sufficient calendering results for high-quality papers, it is advantageous if at least two heatable rollers are installed in the calender.
  • the nature of the elastic roller coverings is important for the calender according to the invention.
  • they have to be resistant to abrasion, like the coverings of soft calenders, in order to have a sufficient service life, since otherwise the entire paper production process would have to be interrupted when changing the rolls.
  • they must be highly resistant to marking, since damage to the roller coverings is immediately noticeable in the paper.
  • the covering must be such that it is not destroyed by the use of a doctor blade to clean the rollers. Only a plastic covering is suitable for realizing these three requirements.
  • an additional device for pulling in an insertion strip is required, since, similar to the super calender, the paper web is guided after a nip around a deflecting roller into the next nip, and - unlike the super calender - with paper machine speed specifications.
  • a device for pulling in an insertion strip can be, for example, two ropes running parallel to the desired paper path, between which an insertion strip cut by the paper web is clamped. This is done by bringing the two ropes together in front of the calender, forming a so-called rope shear, together using rope pulleys according to the desired Paper run through the calender and open again after the calender to release the insertion strip again.
  • the lead-in strip which can have a width of 300 to 500 mm, is cut laterally in front of the calender by the web coming out of the paper machine. While this lead-in strip is then passed through the calender up to a take-up, for example, most of the paper web is fed into a pulper. Only after the insertion process has ended is the insertion strip cut ever wider by moving the knife until the full width of the paper web is finally passed through the calender.
  • pull-in devices can be used which operate according to the following principle.
  • the lead-in strip is passed onto an endless perforated carrier tape, which runs approximately at paper or coating machine speed around two rollers, at least one of which is driven.
  • a suction box below the conveyor belt causes the paper web to adhere to the conveyor belt and to be carried along with the running belt.
  • Additional insertion aids can also be air nozzles or air baffles of a known type.
  • the calender (1) has eight rollers (2 to 9), four of which (2, 4, 7, 9) have a hard metallic surface and four rollers (3, 5, 6, 8) have an elastic plastic covering (13) . All rollers are mounted with their roller journals in bearing housings (23, 23 '). The bearing housings (23 ') of the middle rollers (3, 4, 5, 6, 7, 8) are attached to levers (24) whose pivot point (25) is located on the calender frame (26). A hydraulic cylinder (27) is provided which, on the one hand, applies the forces required for calendering in the closed nip and, on the other hand, can lower the lower roller (9).
  • the drawing shows the condition of the calender after the rollers have been closed again, which is done by extending the hydraulic cylinder (27).
  • heating steam for heating can be fed to the two middle hard rollers (4, 7) in a manner not shown.
  • the heating steam is passed through peripheral bores (22) so that it can give off its heat to the roller.
  • the preceding part of the paper machine (10) and after the calender (1) the following part of the paper machine (11), for example a winder, are only symbolically shown as a box in front of the calender (1).
  • Each of the rolls (2 to 9) in the calender has its own drive (12).
  • a commercially available scraper (14) is installed on an elastic roller (3). In practice, such a scraper (14) would have to be installed on the majority of the elastic rollers (3, 5, 6, 8).
  • Two endless traveling ropes (15, 16) are guided over rope pulleys (17) in such a way that they form rope shears (29) in front of the calender, which can clamp an insertion strip (21) coming from the preceding part of the paper machine (10) between them .
  • the ropes (15, 16) guide the insertion strip through the calender and release it after the calender (1) for the subsequent part of the paper machine (11).
  • a support band (18) is drawn in at an exemplary location. It is perforated and runs around two idlers (19), one of which is driven in a manner not shown.
  • a suction box (20) in which a vacuum is generated in a manner not shown, is located under the part of the carrier tape (18) which carries the insertion strip (21). In the direction of the carrier tape (18), the suction box (20) is open, so that the insertion strip (21) is sucked in through the perforation of the carrier tape (18) and adheres to the carrier tape.

Landscapes

  • Paper (AREA)
EP96117572A 1995-11-21 1996-11-02 Calandre dans une machine à papier ou une machine de couchage Expired - Lifetime EP0775777B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29518424U DE29518424U1 (de) 1995-11-21 1995-11-21 Kalander in einer Papier- oder Streichmaschine
DE29518424U 1995-11-21

Publications (3)

Publication Number Publication Date
EP0775777A2 true EP0775777A2 (fr) 1997-05-28
EP0775777A3 EP0775777A3 (fr) 1998-04-29
EP0775777B1 EP0775777B1 (fr) 2003-06-18

Family

ID=8015702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117572A Expired - Lifetime EP0775777B1 (fr) 1995-11-21 1996-11-02 Calandre dans une machine à papier ou une machine de couchage

Country Status (5)

Country Link
US (1) US5784955A (fr)
EP (1) EP0775777B1 (fr)
JP (1) JP3036585B2 (fr)
CA (1) CA2188607C (fr)
DE (2) DE29518424U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998038382A1 (fr) * 1997-02-28 1998-09-03 Valmet Corporation Procede et dispositif pour engager le papier dans une calandre

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29518424U1 (de) * 1995-11-21 1996-03-14 Voith Sulzer Finishing GmbH, 47803 Krefeld Kalander in einer Papier- oder Streichmaschine
DE19650576C2 (de) 1996-12-06 2001-02-15 Kuesters Eduard Maschf Kalander
US7357072B2 (en) 1996-12-06 2008-04-15 Eduard Kusters Maschinefabrik Gmbh & Co. Kg Calender
US20040134361A1 (en) * 1996-12-06 2004-07-15 Eduard Kusters Maschinenfabrik Gmbh & Co. Kg Calender
FI108056B (fi) 1997-11-04 2001-11-15 Metso Paper Inc Kalanterin päänvientijärjestely
CA2309656C (fr) * 1997-11-14 2008-04-29 Valmet Corporation Procede de production de papier calandre
DE19757472C2 (de) * 1997-12-23 2000-09-07 Voith Sulzer Papiermasch Gmbh Kalander für eine Bahn, insbesondere Papierbahn
DE19757474A1 (de) * 1997-12-23 1999-06-24 Voith Sulzer Papiertech Patent Papierkalander
DE19803323C2 (de) 1998-01-29 2003-06-05 Voith Paper Patent Gmbh Verfahren zur Beeinflussung eines Bahnmaterials, wie Papier, und Kalander zur Durchführung des Verfahrens
US7096779B2 (en) 1998-03-17 2006-08-29 Eduard Küsters Maschinenfabrik GmbH & Co. KG Calender arrangement
US20030126998A1 (en) * 1998-03-17 2003-07-10 Eduard Kusters Maschinenfabrik Gmbh & Co. Kg Calender arrangement
DE19813640A1 (de) 1998-03-27 1999-09-30 Voith Sulzer Papiertech Patent Kalander, insbesondere zur Behandlung einer Papierbahn
DE19815339A1 (de) 1998-04-06 1999-10-14 Voith Sulzer Papiermasch Gmbh Walzenmaschine und Verfahren zu ihrem Betrieb
DE19824542B4 (de) * 1998-06-03 2005-07-14 Voith Paper Patent Gmbh Walze, Kalander und Verfahren zum Betrieb einer Walze
DE19828722C2 (de) * 1998-06-29 2001-06-21 Schwaebische Huettenwerke Gmbh Walzengruppe
DE19841565C1 (de) * 1998-09-11 1999-12-02 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Einführen einer Bahn aus Papier o. dgl. in einen Kalander
US6332953B1 (en) 1998-10-02 2001-12-25 International Paper Company Paper product having enhanced printing properties and related method of manufacture
SE9804346D0 (sv) * 1998-12-16 1998-12-16 Valmet Corp Method and apparatus for calendering paper
US6352022B1 (en) 1999-08-12 2002-03-05 Stora Enso North America Web calendering method and apparatus
FI108057B (fi) * 2000-09-06 2001-11-15 Metso Paper Inc Järjestely paperi-/kartonki- tai jälkikäsittelykoneen monitelakalanterin ratavienniksi
FI121079B (fi) * 2002-05-28 2010-06-30 Metso Paper Inc Menetelmä ja laitteisto köydettömässä päänviennissä jälkikäsittelylaitteella
US6946186B2 (en) * 2002-08-24 2005-09-20 International Paper Co. Uncoated facestock for adhesive-backed labels
FI112876B (fi) * 2002-10-16 2004-01-30 Metso Paper Inc Järjestely päänviennissä paperikoneen monitelakalanterilla
DE10346004A1 (de) * 2003-10-02 2005-04-28 Voith Paper Patent Gmbh Vakuumtransportvorrichtung, insbesondere als Materialbahneinfädeleinrichtung in einer Maschine zur Herstellung oder/und Veredelung einer Materialbahn

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
US454322A (en) * 1891-06-16 Paper-calendering rolls
US2300994A (en) * 1938-08-09 1942-11-03 Cons Water Power & Paper Co Calender for paper
GB753958A (en) * 1953-10-29 1956-08-01 Lukens Steel Co Improvements in rope transfer means for webs of paper or the like
US3044392A (en) * 1959-07-10 1962-07-17 Kimberly Clark Co Papermaking machine
GB969912A (en) * 1960-07-07 1964-09-16 Bruderhaus Maschinen Gmbh Improvements in calenders for strip-material
US3451331A (en) * 1967-03-01 1969-06-24 Westvaco Corp Hot roll supercalender
US3576912A (en) * 1968-09-26 1971-04-27 Shell Oil Co Halogenated and quaternized block polymers
US3756912A (en) * 1970-12-31 1973-09-04 Durand Machine Co Ltd Conveyor mechanism for transferring paper web
US4022366A (en) * 1976-03-22 1977-05-10 Durad Machine Company Ltd. Sheet handling apparatus
FI62874C (fi) * 1979-10-15 1983-03-10 Valmet Oy Pappers kalander
JPS56159393A (en) * 1980-05-06 1981-12-08 Mitsubishi Heavy Ind Ltd Roll heating method
GB8919936D0 (en) * 1989-09-04 1989-10-18 Davy Mckee Poole Improvements in the manufacture of web materials
JPH02300396A (ja) * 1989-05-16 1990-12-12 Minamisenjiyu Seisakusho:Kk カレンダーのキャリャー装置
DE3924897A1 (de) * 1989-07-27 1991-02-07 Escher Wyss Gmbh Vorrichtung zum ueberfuehren und trennen eines ueberfuehrstreifens einer papierbahn
JPH04185790A (ja) * 1990-11-10 1992-07-02 Taiyo Yuden Co Ltd カレンダー処理方法及び装置
DE9306176U1 (de) * 1993-04-23 1993-07-01 Schwäbische Hüttenwerke GmbH, 7080 Aalen Heizwalze
DE29504034U1 (de) * 1995-03-09 1995-05-04 Voith Sulzer Finishing GmbH, 47803 Krefeld Kalander für die zweiseitige Behandlung einer Papierbahn
DE29518424U1 (de) * 1995-11-21 1996-03-14 Voith Sulzer Finishing GmbH, 47803 Krefeld Kalander in einer Papier- oder Streichmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998038382A1 (fr) * 1997-02-28 1998-09-03 Valmet Corporation Procede et dispositif pour engager le papier dans une calandre

Also Published As

Publication number Publication date
DE59610537D1 (de) 2003-07-24
JPH09170189A (ja) 1997-06-30
DE29518424U1 (de) 1996-03-14
US5784955A (en) 1998-07-28
JP3036585B2 (ja) 2000-04-24
EP0775777B1 (fr) 2003-06-18
EP0775777A3 (fr) 1998-04-29
CA2188607A1 (fr) 1997-05-22
CA2188607C (fr) 1999-05-11

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