EP2584093A1 - Système relatif à une chaîne de production d'une bande de fibres - Google Patents

Système relatif à une chaîne de production d'une bande de fibres Download PDF

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Publication number
EP2584093A1
EP2584093A1 EP11185920.3A EP11185920A EP2584093A1 EP 2584093 A1 EP2584093 A1 EP 2584093A1 EP 11185920 A EP11185920 A EP 11185920A EP 2584093 A1 EP2584093 A1 EP 2584093A1
Authority
EP
European Patent Office
Prior art keywords
belt
arrangement
roll
fiber web
arrangement according
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Withdrawn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
EP11185920.3A
Other languages
German (de)
English (en)
Inventor
Teemu Saarikoski
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.)
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
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 Metso Paper Oy filed Critical Metso Paper Oy
Priority to EP11185920.3A priority Critical patent/EP2584093A1/fr
Publication of EP2584093A1 publication Critical patent/EP2584093A1/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Withdrawn legal-status Critical Current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
    • D21G1/0066—Calenders; Smoothing apparatus using a special calendering belt

Definitions

  • the invention relates to an arrangement in connection with a fiber web production line according to the preamble of claim 1.
  • fiber web such as paper and board webs are manufactured in machines which together constitute a paper/board-manufacturing line which can be hundreds of meters long.
  • Modern fiber web machines can produce more than 450 000 tons of paper a year.
  • the speed of the machine can exceed 2000 m/min and the width of the fiber web can be more than 11 meters.
  • a fiber web completing in a machine is wound with a reel-up around a reeling shaft i.e. reel spool into a machine roll (a parent roll) the diameter of which can be more than 3,5 m and the weight more than 100 tons.
  • the purpose of reeling is to modify the web manufactured as planar into a more easily processable form.
  • the machine roll web produced in paper/board-making is full-width and even more than 100 km long so it must be slit into partial webs with suitable width and the partial webs are wound to partial rolls (customer rolls) with suitable length for the customers of the paper/board mill.
  • the slitting and winding take place as known from prior art in an appropriate separate machine i.e. in a slitter-winder.
  • a typical production and treatment line comprises a head box, a wire section and a press section as well as a subsequent drying section and a reel-up.
  • the production and treatment line can further comprise finishing devices, for example a calender and/ or a coater.
  • the production and treatment line also comprises typically at least one slitter-winder for forming customer rolls as well as a roll packaging apparatus.
  • a calender device for calendering a coated or uncoated fibrous web, said device comprising an endless belt adapted to extend around at least one guiding element, one counter-element begin disposed outside the belt loop to provide a contact area with the belt, such that the belt and the counter-element establish there between a web processing zone for passing a web to be calendered there through, wherein inside the belt loop is mounted one press element for squeezing the belt against the counter-element, and wherein the processing zone length is defined by means of the disposition/adjustment of the belt's guiding element and/or by means of the design of the counter-element, the contact pressure adapted to be applied to a web within the processing zone is adapted to be adjustable within the range of about 0.01 MPa to about 70 MPa at a temperature of -70 to 400 degrees Celsius and the calender device is allowing a dwell or residence time in the processing zone of 0.01 to 10 s, wherein the belt comprises a metal belt
  • a calender that has a web treating device that includes two contact surfaces for forming a treatment gap and where one of the surfaces is formed by a band with elastic surface and revolving around guide rolls and where the other surface is an outer wall of a heatable roll and further a counter element is provided for the heatable roll.
  • EP 2270280 is disclosed a calender where the nip has been formed between a heatable roll and a counter element, which calender further comprises a band with elastic surface and rotating around guide rolls and the band presses a fiber web against the heatable roll.
  • EP 2317008 is disclosed a method and a device for opening a belt calender nip and belt calender comprising a belt and guide rolls and a counter roll.
  • An object of the present invention is to provide for an improved arrangement to eliminate or at least minimize the above problems and disadvantages.
  • the arrangement in connection with a fiber web production line in particular in connection with a finishing device of a fiber web production line the arrangement comprises at least one roll and a belt, which belt is arranged to pass on surface of the at least one roll and in the arrangement belt has thickness profile that compensates at least partly the tension variation due to deflection of the at least one roll.
  • metal belt has thickness profile that compensates at least partly the tension variation due to deflection of rolls.
  • the thickness profile variation evens out / compensates the cross direction tension distribution but the tensile stress distribution in cross-direction does not change significantly.
  • edge areas of the belt are thinner than the middle area of the belt such that the thickness profile of the belt corresponds to the deflection profile of the rolls.
  • edge areas are meant areas located in longitudinal direction of the belt beginning from the edge and extending to the middle of the belt in each edge correspondingly. According to an advantageous feature about 20% of the width of the belt from each edge is considered as edge area and thus about 60% of the width of the belt in the middle is considered to be middle area. Thickness ratio of edge areas and middle area of the belt, i.e. the ration of minimum and maximum thickness of the belt is 0,3 -0,9.
  • Advantageously thickness profile of the belt substantially follows cos(70) curve, which is a continuous curve. Also other configuration profiles are possible.
  • the belt is arranged as an endless belt loop extending around at least one roll.
  • rolls with smaller diameters than in prior art devices can be used and simultaneously desired tension distribution of the belt and contact pressure distribution between the roll and the belt is achieved.
  • rolls with uniform diameter and/or rolls with changing diameter can be used.
  • the rolls can also be with or without crown.
  • the belt can be made of metal or plastic material, for example of polymer material, or of support layer material with one or more coating layers.
  • the support layer material can be metal or plastic material and the coating layers can be of elastic material.
  • the properties of the belt are determined by the requirements of the intended use in connection with the production of fiber webs.
  • Rolls used in connection with the invention can be provided with coating and also rolls without coating can be used.
  • Belt used in connection with the invention can be provided with coating on outer and/or inner side of the belt and also belts without coating can be used.
  • FIG 2 longitudinal tension stress of the belt is shown, when the belt thickness is even and width of the belt is 4 m. Roll are not shown for the sake of clarity.
  • FIG 3 is shown contact pressure distribution between the belt and a roll in a case of figure 2 .
  • Figure 4 shows longitudinal tension stress, when belt thickness is even and width of the belt is 5, 4 m i.e. 1,35 multiple of the original width. In this case the tension stress variation increases due to increased roll deflection. In this case due to the uniform thickness of the belt also tension variation increases due to increased roll deflection.
  • contact pressure distribution between the belt and a roll is shown in case of figure 4 and corresponding to the increased tension stress variation also the variation of contact pressure has increased.
  • FIG 6 longitudinal tension stress when the belt is provided with 55% thickness variation ("crown") in relation to the middle thickness and the width of the belt is 5.4 m 1.e. 1,35 multiple of the original.
  • the tension stress variation is very similar to that of figure 4 .
  • FIG 7 is shown the contact pressure distribution between the belt and the roll in case of figure 6 and the contact pressure variation is very similar to that of figure 3 .
  • figure 8 is shown relative average contact pressure distribution in CD-direction between the belt and the roll in different cases and numerical error is filtered.
  • Figure 9 corresponds to figure 8 but in case of 5,4 m belt width and even thickness belt removed.
  • Figure 10 corresponds to figures 8 and 9 but in the example with 55% thickness variation the rolls are with crown.
  • FIGS 11A to 11D some advantageous examples crown forms of the belt 10 according to the inventions are shown. As can be seen from the figures many different forms of the crown of the belt are possible. It should also be understood that the crown form can also be on one side of the belt only. Above the invention has been described with reference to some preferred exemplifying embodiments of the same only, and the invention is, however, by no means to be strictly confined to the details of said embodiments and many modifications and variations are possible.

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  • Paper (AREA)
EP11185920.3A 2011-10-20 2011-10-20 Système relatif à une chaîne de production d'une bande de fibres Withdrawn EP2584093A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11185920.3A EP2584093A1 (fr) 2011-10-20 2011-10-20 Système relatif à une chaîne de production d'une bande de fibres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11185920.3A EP2584093A1 (fr) 2011-10-20 2011-10-20 Système relatif à une chaîne de production d'une bande de fibres

Publications (1)

Publication Number Publication Date
EP2584093A1 true EP2584093A1 (fr) 2013-04-24

Family

ID=45044321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11185920.3A Withdrawn EP2584093A1 (fr) 2011-10-20 2011-10-20 Système relatif à une chaîne de production d'une bande de fibres

Country Status (1)

Country Link
EP (1) EP2584093A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110596192A (zh) * 2019-09-22 2019-12-20 安徽上造智能设备科技有限公司 一种电缆老化红外检测装置及其使用方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1470289A1 (fr) 2002-01-29 2004-10-27 Metso Paper, Inc. Dispositif de traitement et procede d'utilisation de ce dispositif pour traiter une nappe fibreuse enduite ou non enduite
EP1502990A1 (fr) * 2002-04-11 2005-02-02 Yamauchi Corporation Courroies de pressage et dispositif de pressage a sabot utilisant ces courroies
WO2009112071A1 (fr) * 2008-03-12 2009-09-17 Metso Paper, Inc. Courroie en métal avec revêtement précontraint
EP2270280A1 (fr) 2009-06-30 2011-01-05 Andritz Küsters GmbH Calandre destinée au traitement d'une bande de matériau
EP2317008A1 (fr) 2009-10-27 2011-05-04 Voith Patent GmbH Procédé et dispositif d'ouverture d'un interstice de pressage
EP2392729A1 (fr) * 2010-06-01 2011-12-07 Voith Patent GmbH Agencement de bande et procédé de traitement d'une bande de papier dans un agencement de satinage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1470289A1 (fr) 2002-01-29 2004-10-27 Metso Paper, Inc. Dispositif de traitement et procede d'utilisation de ce dispositif pour traiter une nappe fibreuse enduite ou non enduite
EP1502990A1 (fr) * 2002-04-11 2005-02-02 Yamauchi Corporation Courroies de pressage et dispositif de pressage a sabot utilisant ces courroies
WO2009112071A1 (fr) * 2008-03-12 2009-09-17 Metso Paper, Inc. Courroie en métal avec revêtement précontraint
EP2270280A1 (fr) 2009-06-30 2011-01-05 Andritz Küsters GmbH Calandre destinée au traitement d'une bande de matériau
EP2278067A1 (fr) 2009-06-30 2011-01-26 Andritz Küsters GmbH Calandre destinée au traitement d'une bande de matériau
EP2317008A1 (fr) 2009-10-27 2011-05-04 Voith Patent GmbH Procédé et dispositif d'ouverture d'un interstice de pressage
EP2392729A1 (fr) * 2010-06-01 2011-12-07 Voith Patent GmbH Agencement de bande et procédé de traitement d'une bande de papier dans un agencement de satinage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110596192A (zh) * 2019-09-22 2019-12-20 安徽上造智能设备科技有限公司 一种电缆老化红外检测装置及其使用方法
CN110596192B (zh) * 2019-09-22 2021-11-23 安徽上造智能设备科技有限公司 一种电缆老化红外检测装置及其使用方法

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