WO2001056909A1 - Structure de cylindre - Google Patents

Structure de cylindre Download PDF

Info

Publication number
WO2001056909A1
WO2001056909A1 PCT/FI2001/000102 FI0100102W WO0156909A1 WO 2001056909 A1 WO2001056909 A1 WO 2001056909A1 FI 0100102 W FI0100102 W FI 0100102W WO 0156909 A1 WO0156909 A1 WO 0156909A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder structure
reeling
cylinder
coating layer
interface
Prior art date
Application number
PCT/FI2001/000102
Other languages
English (en)
Inventor
Petri Tonteri
Original Assignee
Metso Paper, Inc.
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, Inc. filed Critical Metso Paper, Inc.
Priority to AU2001235508A priority Critical patent/AU2001235508A1/en
Publication of WO2001056909A1 publication Critical patent/WO2001056909A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
    • B65G39/02—Adaptations of individual rollers and supports therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/11—Details of cross-section or profile
    • B65H2404/112—Means for varying cross-section
    • B65H2404/1122—Means for varying cross-section for rendering elastically deformable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1313—Details of longitudinal profile shape concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1314—Details of longitudinal profile shape convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/18—Rollers composed of several layers
    • B65H2404/182—Rollers composed of several layers with emery paper like coating (gripping, anti-slip)

Definitions

  • the invention relates to a cylinder structure, to be used especially in processes related to papermaking and/or further processing of paper, preferably to a reeling cylinder containing a cylindrical core part and on the surface of the same a coating composed of at least two coating layers.
  • a smaller nip force is effective between the reeling core and the central part of the reeling cylinder, which results in that at the location of the central part the air accompanying the paper web more easily gains access to the paper reel that is being formed.
  • the higher nip force at the ends of the reel- ing core and the reeling cylinder prevents the exit of the air that has pervaded the paper reel that is being formed from said paper reel via the sides of the reeling core, or at least complicates the exit of air considerably.
  • air does, however, flow out of the reel that is being formed to some extent, and especially during storage air slowly flows out of the full paper reel.
  • one fact relates to this problem field is that the tighter the paper grade, and the higher the web speed of the paper web, the more air pervades the paper reel that is being formed.
  • the increase in nip force naturally reduces the amount of air entering the paper reel that is being formed, but on the other hand, the fact that some coated and calendered paper grades have to be reeled up with a small nip load because of their the properties, is an impediment for increasing the nip force.
  • high nip force causes so-called edge cracks on the edges of the paper reel.
  • the air transferred in the paper reel that is being formed causes several reeling defects degrading the quality of the paper reel.
  • the hard outer surface of the reeling core is insensitive to the changes in the thickness profile occurring in the paper web.
  • a thicker point in the cross-profile of the paper web has such an effect that said thicker point carries the most of the nip load and, correspondingly, near said thicker point the nip load is reduced. This also causes problems of the above-described kind in the reeling up process.
  • Another drawback of the convex reeling cylinder is that the paper web is forced to travel a path of different length at different speed when seen in the cross direction. This causes shear forces in the paper web and in the worst case reeling defects.
  • the aim of the reeling cylinder with a convex surface, i.e. crowned reeling cylinder, is to attain an even linear load at a certain linear load level, but the drawback still remains that the surface speed of the paper web is higher in the middle of the reeling cylinder.
  • the purpose of the present invention is to eliminate the above-presented drawbacks to a large degree, thus improving the state of art in the field.
  • the cylinder structure according to the invention to be used especially in processes related to paper- making and/or further processing of paper, preferably as a reeling cylinder, is primarily characterized in that the interface between the coating layers changes at least partly in the radial direction, being preferably mainly curved in the longitudinal cross-section of the cylinder structure.
  • the cylinder structure according to this definition can be designed in such a manner that when a nip contact is formed, the structure yields most in the edge areas of the reeling cylinder and least in the middle.
  • this structural solution compensates the deflection of the reeling core and effectively levels off the nip load profile. It is possible to affect the nip load profile and its distribution by selecting the coating layers so that they are suitable for each purpose of use according to the knowledge of anyone skilled in the art, for example by using materials or combinations of materials the behaviour of which under the effect of compression stress is well known (e.g. rubber and/or cork).
  • the purpose of the cylinder structure according to the invention is that on one hand the nip pressure and on the other hand the surface speed of the paper web that form the nip load profile are the same on the entire width of the nip, irrespective of the loadings applied to the cylinder structure, which typically cause de- flections in the cylinder structure.
  • the cylinder structure according to the invention is designed in such a manner that the outer coating layer is at its thickest at the ends of the cylinder structure, wherein the interface is preferably substantially convex on the side of the inner coating layer and substantially concave on the side of the outer coating layer.
  • this structure makes it possible that in the normal situation of forming the nip load profile, when a cylinder structure according to the invention is used, the nip load is even on the entire width of the paper web during the reeling up, also with small nip forces, because by means of a suitable selection of materials, the reeling cylinder yields most at the ends of the reeling cylinder and least in the middle. In particular, this functional situation compensates the deflection of the reeling core and levels off the nip load profile.
  • Fig. 1 shows a first embodiment of the cylinder structure according to the invention in a longitudinal cross-section of the cylinder structure
  • Fig. 2 correspondingly shows a second embodiment of the cylinder structure according to the invention in a longitudinal cross-section of the cylinder structure
  • Fig. 3 shows a preferred embodiment of the cylinder structure, related to its use.
  • the cylinder structure according to the drawing is intended to be used especially in processes related to papermaking and/or further processing of paper.
  • One preferred application target is the reeling cylinder.
  • the main parts of the cylinder structure are a first cylindrical core part 1 and a coating 2 located on the surface of the core part 1 , said coating being composed of at least two coating layers 2a, 2b.
  • the cylinder structure comprises a cylindrical core part 1 the diameter of which is constant and defined on the basis of the diameter size H at the location of the end of the cylinder structure.
  • the structure and material of the core part 1 is selected according to the requirements set by the target of use.
  • the continuous interface 3 between the coating layers 2a, 2b, at the location of which the coating layers 2a, 2b are in close contact with each other is at least partly, preferably mainly curved in the longitudinal cross-section of the cylinder structure according to Figs. 1 and 2.
  • the interface 3 is convex on the side of the inner coating layer 2a in said curved area and, correspondingly, concave on the side of the outer coating layer 2b in said curved area.
  • the outer surface 2'b of the outer coating layer 2b is straight (i.e. an arbitrary straight line connecting the outer parts of the outer surface 2'b and extending in the direction of the central line of the cylinder structure is parallel to the central line of the cylinder structure) when the cylinder structure is unloaded in the radial direction.
  • the outer surface 2'b is an even, continuous surface, or the outer surface 2'b is provided with grooves especially to control the air flows.
  • the straight line connecting the peaks of the ridges of the grooved structure and extending in the direction of the central line of the cylinder structure is parallel to the central line of the cylinder structure.
  • the shape of the interface 3 attained by the definition of the equation preferably at least partly equals the shape of the deflection line of the reeling core.
  • the shape of the interface 3 is also selected in such a manner that the interface 3, as seen in the longitudinal cross-section of the cylinder structure, is symmetrical with respect to the plane which is perpendicular to the longitudinal axis of the cylinder structure and bisects the length of the cylinder structure, wherein, due to the convex shape of the inner coating layer 2a, the outer coating layer 2b is at its thinnest in the central part of the cylinder structure and at its thickest at the ends of the cylinder structure.
  • the inner coating layer 2a is made of the same material as the core layer 1 and the outer coating layer 2b is made of a different material than the inner coating layer 2a and the core layer 1.
  • the interface 4 between the core layer 1 and the inner coating layer 2a is marked with a broken line in Fig. 1 , wherein the core part 1 thus forms a cylinder shape with a fixed diameter, from the outer surface of which the inner coating layer 2a protrudes in the radial direction thus forming a shape with a convex surface.
  • all layers i.e. the core layer 1 and the inner and the outer coating layers 2a, 2b are made of different materials.
  • the core part 1 forms a cylinder shape with a fixed diameter, from the outer surface of which, i.e. from the interface 4 between the core layer 1 and the inner coating layer 2a, the inner coating layer 2a protrudes in the radial direction thus forming a shape with a convex surface.
  • the elastic modulus of the outer coating layer 2b is smaller than the elastic modulus of the inner coating layer 2a.
  • this functional situation in particular compensates the deflection of the reeling core and levels off the nip load profile, wherein the nip load is even on the entire width of the paper web during the reeling up process.
  • Fig. 3 shows a side view of a reel-up of paper-web, in which reel up a continuous paper web coming from a paper machine or a finishing apparatus for paper is reeled around a reeling core 5 by passing it through a nip N formed between the reeling core 5 or paper layers wound thereon and a reeling cylinder, which is constituted of the cylinder structure according to the invention.
  • the reeling core is mounted for rotation in the reel-up and the nip force is largely determined by the load applied to the ends of the reeling core.
  • the paper web W entering the nip N travels over the reeling cylinder, likewise mounted for rotation, within a certain sector before the nip N.
  • the reel-up is preferably a continuously operating reel-up that is arranged to form machine reels around the reeling cores from a full width web issuing form the paper machine or finishing apparatus for paper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

L'invention concerne une structure de cylindre destinée en particulier aux opérations associées à la fabrication du papier. Cette invention convient particulièrement pour un cylindre d'enroulement comprenant un élément (1) central cylindrique, recouvert d'un revêtement (2) composé d'au moins deux couches (2a, 2b) de revêtement. L'interface entre les couches (2a, 2b) de revêtement est au moins partiellement, de préférence sensiblement courbe dans la section longitudinale de la structure de cylindre.
PCT/FI2001/000102 2000-02-07 2001-02-06 Structure de cylindre WO2001056909A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001235508A AU2001235508A1 (en) 2000-02-07 2001-02-06 Cylinder structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20000245 2000-02-07
FI20000245A FI20000245A0 (fi) 2000-02-07 2000-02-07 Lieriörakenne

Publications (1)

Publication Number Publication Date
WO2001056909A1 true WO2001056909A1 (fr) 2001-08-09

Family

ID=8557359

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2001/000102 WO2001056909A1 (fr) 2000-02-07 2001-02-06 Structure de cylindre

Country Status (3)

Country Link
AU (1) AU2001235508A1 (fr)
FI (1) FI20000245A0 (fr)
WO (1) WO2001056909A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010105868A1 (fr) * 2009-03-16 2010-09-23 Voith Patent Gmbh Cylindre
US20130043620A1 (en) * 2011-08-19 2013-02-21 Fuji Xerox Co., Ltd. Cylindrical core member and method of manufacturing tubular member

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3729448A1 (de) * 1987-09-03 1989-03-16 Hoechst Ag Verfahren und vorrichtung zum lageweisen aufwickeln einer flachen materialbahn
US4864926A (en) * 1987-06-19 1989-09-12 Saueressig & Co. Intaglio printing cylinder having a core and a sleeve releasably fastened thereto
EP0500515A1 (fr) * 1991-02-20 1992-08-26 Valmet Paper Machinery Inc. Mandrin d'enroulement
US5175053A (en) * 1991-03-20 1992-12-29 American Roller Company Pelletizer feed roller
DE4321112A1 (de) * 1992-07-06 1994-01-13 Tela Papierfabrik Ag Balsthal Speicherrolle und Verfahren zu deren Herstellung
US5335871A (en) * 1992-03-26 1994-08-09 J. M. Voith Gmbh Winder for rewinding a web, especially a paper web
EP0613849A1 (fr) * 1993-03-02 1994-09-07 Eastman Kodak Company Noyau avec une garniture pour l'enroulage des bandes
EP0960841A1 (fr) * 1998-05-27 1999-12-01 Tsubakimoto Chain Co. Rouleau de retour pour un transporteur à lattes

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4864926A (en) * 1987-06-19 1989-09-12 Saueressig & Co. Intaglio printing cylinder having a core and a sleeve releasably fastened thereto
DE3729448A1 (de) * 1987-09-03 1989-03-16 Hoechst Ag Verfahren und vorrichtung zum lageweisen aufwickeln einer flachen materialbahn
EP0500515A1 (fr) * 1991-02-20 1992-08-26 Valmet Paper Machinery Inc. Mandrin d'enroulement
US5175053A (en) * 1991-03-20 1992-12-29 American Roller Company Pelletizer feed roller
US5335871A (en) * 1992-03-26 1994-08-09 J. M. Voith Gmbh Winder for rewinding a web, especially a paper web
DE4321112A1 (de) * 1992-07-06 1994-01-13 Tela Papierfabrik Ag Balsthal Speicherrolle und Verfahren zu deren Herstellung
EP0613849A1 (fr) * 1993-03-02 1994-09-07 Eastman Kodak Company Noyau avec une garniture pour l'enroulage des bandes
EP0960841A1 (fr) * 1998-05-27 1999-12-01 Tsubakimoto Chain Co. Rouleau de retour pour un transporteur à lattes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010105868A1 (fr) * 2009-03-16 2010-09-23 Voith Patent Gmbh Cylindre
US20130043620A1 (en) * 2011-08-19 2013-02-21 Fuji Xerox Co., Ltd. Cylindrical core member and method of manufacturing tubular member

Also Published As

Publication number Publication date
AU2001235508A1 (en) 2001-08-14
FI20000245A0 (fi) 2000-02-07

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