EP1398414A2 - Aménagement de calandre à pinçage prolongé et procédé de satinage d'une bande de papier ou de carton - Google Patents

Aménagement de calandre à pinçage prolongé et procédé de satinage d'une bande de papier ou de carton Download PDF

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Publication number
EP1398414A2
EP1398414A2 EP03017365A EP03017365A EP1398414A2 EP 1398414 A2 EP1398414 A2 EP 1398414A2 EP 03017365 A EP03017365 A EP 03017365A EP 03017365 A EP03017365 A EP 03017365A EP 1398414 A2 EP1398414 A2 EP 1398414A2
Authority
EP
European Patent Office
Prior art keywords
wide nip
web
calender
nip calender
paper
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.)
Withdrawn
Application number
EP03017365A
Other languages
German (de)
English (en)
Other versions
EP1398414A3 (fr
Inventor
Reinhard Leigraf
Alexander Wassermann
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 EP1398414A2 publication Critical patent/EP1398414A2/fr
Publication of EP1398414A3 publication Critical patent/EP1398414A3/fr
Withdrawn legal-status Critical Current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 arrangement a production plant for paper or board with one Wide nip calender, one by a revolving Jacket and a counter pressure element against which the jacket is pressed, has formed wide nip. Furthermore concerns the invention a method for satinizing a Paper or cardboard web in a wide nip calender Production plant for paper or cardboard, the one by a surrounding jacket and a counter pressure element, against which the coat is pressed Has Breitnip.
  • Paper or cardboard webs usually have to be in the course of your manufacturing process, i.e. they must be pressurized become. If necessary, this pressurization also with heat supply at an elevated temperature connected. At higher speeds, such as in particular occur in newer paper machines wide nip calenders in online mode, i.e. the Paper or cardboard web is satinized when it is out the paper machine comes. So you avoid winding up the paper or cardboard web between the paper machine and the wide nip calender.
  • the invention is based, the application, the task to expand as a wide nip calender.
  • This task is done with a wide nip calender arrangement solved in that in the web running direction before the Breitnip an unwinder is arranged.
  • the unwinding device assigned a storage facility. This is particularly advantageous for those with Wet strength agents are provided, for example with a Glue. There are wet strength agents between the fibers a track will only mature over time and for example only develop their maximum effect after a week. If you only after the satinage in the wide nip this period of maturity, you get a qualitative higher quality train. For example, a curl can be prevented become.
  • the wide nip calender is preferably different Operable speeds.
  • the wide nip calender So has ways to speed up his work to change. This has several advantages achieve. You can use the wide nip calender, for example run faster than production, i.e. the Paper machine. The remaining time can then be used to keep the web safe at slower speeds perform. You can reverse the satin also run slower than production. at there are advantages to slower satin finishes. For example the processing time can be increased and thus more energy, preferably thermal energy, in the Bru are entered. There are these options if the Breitnipkalander is operated online, because here by the speed of the paper machine is set.
  • the wide nip calender is preferably a moisture application device assigned. Also shows here an advantage of using the Breitnipkalander offline. When the web is unwound from a roll is usually colder than a web that comes out of the paper machine. A colder runway is essential more receptive to moisture from a Moisture application device, for example a steam or nozzle humidifier.
  • the wide nip calender is preferably another Downstream treatment facility. If the web is treated offline, i.e. unwind from a roll then you can basically do all offline treatments carry out, which are necessary for the railway. So you can satinize in the wide nip calender with a combine further offline treatment.
  • an offline treatment facility through an offline calender in particular an offline Janus calender is formed.
  • the Breitnipkalander serves the web vorzuglätten. This has a particular advantage in that the risk of barring in the Janus calender is reduced. Barrings are horizontal stripes, after a certain period of operation on the train form. It is assumed that these horizontal stripes or Barrings due to a vibration phenomenon are. A web entering the calender is in front of the Treatment never completely free of basis weight or thickness fluctuations. There is a risk that these irregularities to excite vibrations lead, which ultimately causes the formation of barring.
  • an offline treatment facility is formed by a slitter.
  • the slitter cuts the web into longitudinal strips and wobbles then on. If you have a wide nip calender here upstream, you can still get a good leveling certain properties across the width the train. For example, you can use the wide nip calender for moisture balance or to one Use further volume-smoothing the surface.
  • the wide nip calender is preferably behind or in front arranged a coating machine.
  • the coating machine too is arranged offline in this case.
  • the compressive stress in the wide nip is preferably on different values adjustable.
  • the compressive stress in the wide nip calender is therefore changeable.
  • the railway treatment after production, i.e. offline, can ever be very different according to requirements.
  • matte varieties that are only slightly satin and shiny varieties that have a high satin finish is required. Whichever result you get want to achieve with the satin, the compressive stress set. This is one used online Wide nip calenders not so easy.
  • the task is in a method of the aforementioned Art solved in that the web before Satin coating unwound from a roll.
  • the web is preferably left on before unwinding cool a predetermined temperature.
  • a cooled one For example, web is much more receptive to Moisture from a steam or nozzle humidifier is donated. If you take the train on a lower one Temperature, then you can target energy in the Breitnip feed in the way you want it, for example through a combination of pressure and temperature. you is no longer dependent on the one contained in the train Energy content in the form of heat from the Take the dryer section of the paper machine into account to have to.
  • the web is stored for a predetermined one Time before unwinding on the roll between, where the time is measured so that there are differences in humidity, that were created during the manufacture of the web are balanced.
  • the satin are Differences in humidity, for example in Moisture strips that appear during the manufacture of the Train have arisen, express, already balanced again.
  • the satin finish of the web can be much more even take place, so that there is a better quality web results.
  • Roles with the same processing requirements are preferred to groups together and satined Paths of a group's roles in succession while to temporarily store roles from other groups. How specified above is the web treatment after production very different depending on the requirement. mat Varieties are only slightly satinized, while shiny Varieties need to be more satinized. You can now summarize the individual varieties in campaigns or groups and the roles of a group in a row satin finishing. Only when all roles in a group have been processed you change the settings of the wide nip calender and then move on to another group, i.e. frosted sheets of rolls that have other requirements exhibit. This is a very economical one Operation because of the wide nip calender comparatively rare must be shut down to adjust its settings to change. Nevertheless, there is high productivity.
  • the working speed of the Breitnipkalanders different than the working speed a paper machine that makes the web.
  • the Breitnipkalander run slower than the paper machine and thus quality advantages achieve.
  • the satin is related with a stroke application also carried out offline performs. If you also do the stroke offline, then you have other options not with an online line application given are.
  • the satin in the Wide nip calender combined with another offline process, for example another satin finish in a calender, preferably in a Janus calender, or cut and wind in a slitter, then the step of additional unwinding in Basically meaningless.
  • a wide nip calender arrangement 1 is used for treatment a web 2 of paper or cardboard.
  • Lane 2 is in an unwinder 3 unwound from a roll 4.
  • the roll 4 becomes a schematic and therefore Magazine 5 not shown to scale where it has been stored for a predetermined one.
  • the wide nip calender 6 is formed by a roller 7 with heating channels 8, into which a heat transfer fluid, for example hot water or hot Oil can be fed.
  • a heat transfer fluid for example hot water or hot Oil
  • a circumferential jacket acts together with the roller 7 10 of a shoe roller 11.
  • the shoe roller 11 forms together with the roller 7 a broad nip 12.
  • the jacket 10 is under the action of a pressure shoe 13 against the Roller 7 pressed.
  • the roller 7 is therefore also "Counter pressure element" called.
  • the jacket 10 lies in the area of the wide nip 12 Intermediate layer of the web 2 on the roller 7.
  • the coat 10 is so compliant that it is the curvature the roller 7 can adjust and accordingly via a predetermined circumferential length abuts the circumference of the roller 7. Otherwise, the jacket 10 runs, as shown, like a roller. It is shown schematically by shown support rollers 14 supported. alternative for this purpose, the jacket 10 can also be made much thinner, so that it revolves like a ribbon. In each Fall is the coat 10 but by the pressure shoe 13, which has a contact surface 15 against which Roller 7 pressed.
  • a moistening device 16 In front of the wide nip calender 6 is a moistening device 16 arranged.
  • the humidifier 16 can for example be designed as a steam or nozzle humidifier his.
  • An embodiment is shown in which the humidifier 16 on both sides Lane 2 works. In many cases it will sufficient, moisture only on one side of the web 2 to be applied, in particular to the page on the Roller 7 abuts. This applies in particular if the Roller 7 is designed as a hard, smooth roller, preferably with a polished surface. But also that Coat 10 can, if it has a sufficiently smooth Surface has to contribute to smoothing the web 2.
  • the web After passing through the wide nip 12, the web is in a winding device 17 on a winding roll 18 wound. Before winding onto the reel 18 the web 2 passes through a slitter 19, in which the web 2 to a manageable width in Range from 0.8 to about 3.8 m is cut.
  • the winding device 17 is in the present exemplary embodiment designed as a double winder, i.e. the winding roller 18 lies on two support rollers 20, 21, each having a drive 22, 23. additionally is a rider roll 24, which is also used as a pressure roller can be designated, provided with a drive 25.
  • the drives accordingly 22, 23, 25, it is possible for the winding roller 18 To convey the winding hardness curve of the desired specifications equivalent. For example, the winding hardness Remove from the inside out.
  • a Janus calender 26 can be arranged between the wide nip 12 and the winding device 17, a Janus calender 26 can be arranged. This one Arrangement is optional, the calender 26 is dashed located.
  • the Janus calender 26 is designed as in EP 0 732 447 B1, EP 0 732 444 B1, EP 0 732 446 B1, EP 0 735 185 B1 and / or 0 732 445, i.e. it has eight rollers 27-34, which have a power sensor 35 are pressed against each other.
  • the Rolls 27, 29, 30, 32, 34 designed as "soft” rolls, i.e. they have an elastic surface covering on, preferably made of a plastic.
  • the remaining Rollers 28, 31, 33 are so-called "hard” rollers trained, i.e. the surface of these rollers 28, 31, 33 consists of a largely unyielding metal, like steel or cast iron. In a manner known per se the intermediate or middle rollers 28-33 cannot levers shown in detail. If the lower one Roller 34 is lowered, then the rollers can separate from each other.
  • the rollers 27-34 form a stack that under one An angle of about 45 ° to the vertical can be arranged.
  • the roller 7 and optionally the jacket 6 also have a speed adjustable drive so that they each have a peripheral speed that of the speed corresponds to lane 2.
  • the contact between the web 2 and the roller 7 or the jacket 10 i.e. non-slip, i.e. the contact zone has no sliding area, but forms a detention area.
  • Pre-smoothing in the Breitnip 12 reduces excitement entered in the calender 26.
  • the web 2 is first in the usual way on a Paper machine manufactured and then wound up to roll 4.
  • the roller 4 is then for a predetermined Time stored in magazine 5.
  • Wet strength agents for example glue, ripen between the fibers of the web only with time.
  • the roll 4 can cool down in the magazine 5, i.e. the train 2 has a much lower temperature when the Humidification device 16 passes. It is with it much more absorbent for the moisture that is released by the humidifier.
  • the web treatment after production can be done according to the requirement be different. For example, there is matt varieties that are only slightly satinized, and shiny varieties that require a high degree of satin is.
  • the different types are summarized in Campaigns together, i.e. you satinize several roles of a variety in a row and only then changes the necessary settings in the wide nip calender 6 or Calender 26
  • the compressive stresses in the Breitnip 12 are adjustable.
  • the pressure shoe 13 is shown schematically by a shown pressure transmitter 36 supports the force effect is very sensitive adjustable. So you can the compressive stresses prevailing in the Breitnip 12 are very high adapt exactly to the requirements.
  • the roller 7 has a drive 37 and the jacket 10 has a drive 38.
  • the path as shown in dashed lines, be guided by a coating machine 39.
  • the Coating machine 39 can also be arranged in front of the wide nip 12 his.
  • the coating machine 39 can also still be arranged in series with the calender 26.

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  • Paper (AREA)
EP03017365A 2002-08-30 2003-07-31 Aménagement de calandre à pinçage prolongé et procédé de satinage d'une bande de papier ou de carton Withdrawn EP1398414A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10239907 2002-08-30
DE2002139907 DE10239907A1 (de) 2002-08-30 2002-08-30 Breitnipkalanderanordnung und Verfahren zum Satinieren einer Papier- oder Kartonbahn

Publications (2)

Publication Number Publication Date
EP1398414A2 true EP1398414A2 (fr) 2004-03-17
EP1398414A3 EP1398414A3 (fr) 2005-02-09

Family

ID=31724189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03017365A Withdrawn EP1398414A3 (fr) 2002-08-30 2003-07-31 Aménagement de calandre à pinçage prolongé et procédé de satinage d'une bande de papier ou de carton

Country Status (2)

Country Link
EP (1) EP1398414A3 (fr)
DE (1) DE10239907A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2278068A1 (fr) * 2009-07-14 2011-01-26 Voith Patent GmbH Procédé et arrangement pour fabriquer du papier ou carton couché

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004010894A1 (de) 2004-03-06 2005-09-22 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Behandeln einer Bahn aus Papier oder Karton

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4412625C2 (de) * 1994-04-13 1999-05-06 Kleinewefers Gmbh Vorrichtung und Verfahren zum Behandeln einer Materialbahn
FI991108L (fi) * 1999-05-14 2000-11-15 Valmet Corp Menetelmä ja sovitelma kalanteroidun paperin tai kartongin valmistamis eksi
FI107554B (fi) * 2000-02-25 2001-08-31 Metso Paper Inc Menetelmä paperi- tai kartonkirainan valmistuksessa ja paperi- tai kartonkikone
AU2001289975A1 (en) * 2000-10-02 2002-04-15 Metso Paper Inc. Method and arrangement for calendering a web comprising a long-nip calender

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2278068A1 (fr) * 2009-07-14 2011-01-26 Voith Patent GmbH Procédé et arrangement pour fabriquer du papier ou carton couché

Also Published As

Publication number Publication date
DE10239907A1 (de) 2004-03-18
EP1398414A3 (fr) 2005-02-09

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