EP1225275A2 - Procédé pour le fonctionnement d' un calandre et calendre - Google Patents

Procédé pour le fonctionnement d' un calandre et calendre Download PDF

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Publication number
EP1225275A2
EP1225275A2 EP01130368A EP01130368A EP1225275A2 EP 1225275 A2 EP1225275 A2 EP 1225275A2 EP 01130368 A EP01130368 A EP 01130368A EP 01130368 A EP01130368 A EP 01130368A EP 1225275 A2 EP1225275 A2 EP 1225275A2
Authority
EP
European Patent Office
Prior art keywords
soft
rollers
nips
rolls
roller
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
EP01130368A
Other languages
German (de)
English (en)
Other versions
EP1225275B1 (fr
EP1225275A3 (fr
Inventor
Dirk Cramer
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 EP1225275A2 publication Critical patent/EP1225275A2/fr
Publication of EP1225275A3 publication Critical patent/EP1225275A3/fr
Application granted granted Critical
Publication of EP1225275B1 publication Critical patent/EP1225275B1/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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure

Definitions

  • the invention relates to a method for operating a Calenders with a roll stack of several in Press direction rollers arranged one above the other, from which at least one as a heated roller and at least two designed as soft rollers with a plastic covering are where you have a material web through closed Nips between neighboring ones Rollers are formed, leads and one in predetermined Situations when opening the nips in the direction of the press each created a distance between adjacent rollers.
  • the invention also relates to a calender a stack of rolls, several in the press direction has superposed rollers, of which at least one as a heated roller and at least two designed as soft rollers with a plastic covering are, each soft roller with the adjacent one heated roller forms a soft nip and at least an intermediate roller has an ejection device.
  • Such calenders are used to make a material web, especially a paper web, to satinize.
  • the paper web is covered by the nips of the Roll stack guided.
  • the nips When the nips are closed what is the case after a performance process becomes the Paper web pressurized and at elevated temperature. On the one hand, the paper web is compressed.
  • the surface quality of the Paper web On the other hand, the surface quality of the Paper web to be improved.
  • soft nips are used, i.e. Nips or Nip by a hard roller and a soft one Roller, i.e. a roller with an elastic or compliant surface. This can the hard roller to be heated.
  • the invention has for its object the formation of barring to reduce.
  • This task is carried out in a method of the aforementioned Kind of resolved by giving way in all Nips between a soft and a heated roller a thermal coupling between the two rollers reduced more than by generating the distance in Press direction.
  • the thermal coupling is preferably reduced only if the calender stops for more is to be expected as a predetermined period of time.
  • a thermal Influencing the soft by the heated roller only is harmful if it has a predetermined Period continues.
  • you can save the reduction of the thermal coupling. You can create a list of typical situations where you should reduce the thermal coupling, for example changing a roller. If on the other hand only the paper web has to be re-listed is that Do not usually reduce the thermal coupling required.
  • the thermal coupling is preferably reduced after opening the nips. So you can look at the operation limit to only one action at a time Time to perform. This simplifies it Control.
  • rollers are preferably moved perpendicular to theirs Axes out of the roll stack. This keeps the Short distances over which the rollers are moved.
  • the soft rollers usually have a lighter weight than the heated hard rollers.
  • this configuration has the advantage that the soft rollers leave a place through which heated rollers has already been heated.
  • each a heat shield insert into the soft nips. Because most of the Heat from the heated to the soft rollers Radiation is transmitted, the thermal shield be relatively simple. As a rule, it is enough that the heat shield weakens the heat radiation or prevents. For example, the heat shield one side facing the heated roller have, which reflects the heat radiation.
  • the task is with a calender of the above Art solved in that in every soft nip a roller has an ejection device and one Control device is provided with which in all soft Nips one of the rollers in the export position at the same time is durable.
  • the soft rollers are preferably in the export position durable.
  • the soft rollers have, as stated above, usually a lower weight, so that you can Hold the soft rollers in the export position accordingly less power needed.
  • the direction of the press is preferably vertical inclined. This has the advantage that it is also out rollers moved the movement out of the roll stack does not interfere with the roller to be replaced.
  • a calender 1 has a roll stack of several Rolls, in the present case seven rolls, namely three heated intermediate rolls 2, 3, 4, two soft Intermediate rolls 5, 6 and two soft end rolls, namely an upper roller 7 and a lower roller 8.
  • the entire Roll stack with rolls 2-8 is opposite to that Vertical inclined at an angle of approximately 45 °.
  • the soft rollers 5-8 have, as this is only schematic is shown, a covering 9 made of a plastic on.
  • the heating of the hard rolls 2, 3, 4 is schematically represented by peripheral bores 10.
  • rollers 2-8 can move together in a press direction 11 and then form nips 12-17 a material web, not shown, for example a paper web can be run to with increased pressure and temperature become.
  • rollers exchange From time to time it is necessary to use one of the rollers exchange, i.e. a roller from the roller stack remove and use a different roller.
  • the rollers 2-8 in the press direction 11 moved apart so that the nips 12-17 open and a gap height of about 10 mm arises.
  • the result distance formed between adjacent rollers is necessary so that the roller to be removed when removing has a certain freedom of movement.
  • the soft rollers 5-8 perpendicular to the press direction 11 from the roll stack drives out, so that the soft rollers 5-8 their dashed shown rest positions 5 ', 6', 7 ', 8'. In these rest positions they are so far from the heated rollers 2, 3, 4 removed that heat transfer, that lead to harmful effects could be avoided.
  • Heat shield 18 is arranged as schematically can be seen between the rollers 4, 8.
  • Heat shield should mainly be the radiation between the heated roller and the soft roller interrupt.

Landscapes

  • Treatment Of Fiber Materials (AREA)
  • Paper (AREA)
EP20010130368 2001-01-18 2001-12-20 Procédé pour le fonctionnement d' un calandre et calendre Expired - Lifetime EP1225275B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001102094 DE10102094C1 (de) 2001-01-18 2001-01-18 Verfahren zum Betreiben eines Kalanders und Kalander
DE10102094 2001-01-18

Publications (3)

Publication Number Publication Date
EP1225275A2 true EP1225275A2 (fr) 2002-07-24
EP1225275A3 EP1225275A3 (fr) 2003-12-03
EP1225275B1 EP1225275B1 (fr) 2006-12-13

Family

ID=7670948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010130368 Expired - Lifetime EP1225275B1 (fr) 2001-01-18 2001-12-20 Procédé pour le fonctionnement d' un calandre et calendre

Country Status (2)

Country Link
EP (1) EP1225275B1 (fr)
DE (2) DE10102094C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013200326A1 (de) 2013-01-11 2014-07-17 Valmet Technologies, Inc. Vorrichtung zur Bearbeitung einer Faserbahn, Verfahren zum Bewegen eines Elements und Verfahren zum Austauschen einer Walze
CN112281536B (zh) * 2020-09-11 2023-04-25 广东维敏特科技有限公司 一种热敏纸的压光设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4133768A1 (de) * 1990-10-11 1992-04-16 Valmet Paper Machinery Inc Kalander einer papier- oder kartonmaschine
DE19904451A1 (de) * 1999-02-04 2000-08-17 Voith Sulzer Papiertech Patent Kalander für bahnförmige Materialien wie Papier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4133768A1 (de) * 1990-10-11 1992-04-16 Valmet Paper Machinery Inc Kalander einer papier- oder kartonmaschine
DE19904451A1 (de) * 1999-02-04 2000-08-17 Voith Sulzer Papiertech Patent Kalander für bahnförmige Materialien wie Papier

Also Published As

Publication number Publication date
EP1225275B1 (fr) 2006-12-13
DE10102094C1 (de) 2002-03-07
EP1225275A3 (fr) 2003-12-03
DE50111633D1 (de) 2007-01-25

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