EP2997189A1 - Rouleau pour machine de fabrication, finition et/ou façonnage d'une bande de matière fibreuse - Google Patents

Rouleau pour machine de fabrication, finition et/ou façonnage d'une bande de matière fibreuse

Info

Publication number
EP2997189A1
EP2997189A1 EP14725040.1A EP14725040A EP2997189A1 EP 2997189 A1 EP2997189 A1 EP 2997189A1 EP 14725040 A EP14725040 A EP 14725040A EP 2997189 A1 EP2997189 A1 EP 2997189A1
Authority
EP
European Patent Office
Prior art keywords
roller
layer
conductive
intermediate layer
cover
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Withdrawn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
EP14725040.1A
Other languages
German (de)
English (en)
Inventor
Friedrich KNOLL
Stefan Pollaschek
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 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2997189A1 publication Critical patent/EP2997189A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings

Definitions

  • the invention relates to a roller, in particular for use in a machine for producing and / or finishing a fibrous web, such as a paper, board or tissue web, and preferably in a calender for smoothing a paper web according to the preamble of claim 1.
  • Such rolls usually have a roll core of a metallic or a composite material, which is provided with a roll cover, which usually has at least one bonding layer and a functional layer contacting the fiber web.
  • the protection against electrostatic charge can essentially be achieved by avoiding charging, for example by grounding the components and dissipating the charge by using materials that dissipate electrostatically.
  • a roll for a paper machine which is designed to be electrically conductive by electrically conductive fillers in the form of fibers and particles are introduced into the material of the roll cover.
  • the disadvantage of this known roll is, above all, that the entire roll cover must be designed to be electrically conductive in terms of structure and / or radial extent, which entails a considerable outlay in terms of raw materials and costs.
  • the roll cover at least one device for discharging electrical charges is provided, which is in conductive connection with a ground located outside of the roll.
  • the at least one device is formed in the form of at least one conductive wire or a grating or fleece provided at least partially with conductive material.
  • the conductive wire may be in the form of a copper wire or a fiber at least partially coated with a conductive coating.
  • the at least one device can be arranged spirally or formed flat in the form of a grid or a fleece.
  • the roll cover can advantageously have at least one adhesion-promoting layer, an intermediate layer and a functional layer contacting the fiber web.
  • Other variants with more or fewer layers are possible and conceivable.
  • the at least one device can preferably be formed between the adhesion-promoting layer and the intermediate layer and / or between the intermediate layer and the functional layer.
  • the at least one device may be conductively connected by a connection to the roll core or to a ground outside the roll.
  • connection can run within the functional layer and / or within the intermediate layer and / or emerge from the functional layer and / or from the intermediate layer at the front side.
  • An electrical resistance of the roller cover (3) must be below 10 11 ohms to avoid electrostatic charging.
  • Fig. 1 is a highly schematic sectional view of an embodiment of an inventively designed roller
  • FIG. 2 is a highly schematic perspective view of a roller with an inventively designed electrically conductive measure.
  • FIG. 1 shows a roller 1 in a highly schematized partial sectional view a roll core 2, which may preferably be made of metal such as steel or of a composite material with a fiber reinforcement such as glass or carbon fiber and a resin matrix, and a roll cover 3.
  • the roll cover 3 has in the illustrated embodiment, a multi-layered structure on the roll core 2, first an adhesion-promoting layer 4, on this an intermediate layer 5 and a functional layer 6, which is designed for contact with a fibrous web, not shown, such as a paper or board web.
  • the roll cover 3 further comprises at least one device 7 which is suitable for discharging electrostatic charges from the functional layer 6 via the intermediate layer 5 or also derived directly into the roll core 2. Since the roll core 2 is in a machine chair on earth, so that the charging of the roller 1 can be prevented or a possibly build-up charge can be derived. In the entire volume of the roll cover 3, although electrically insulating regions or layers may be included, which would cause an electrical separation of the reference surface, where the charge build-up takes place, from the grounded roll core 2.
  • the electrically insulating regions or layers are always conductively connected to the roller core 2 by the measures described in more detail below, in order to thus ensure the electrostatic discharge without interfering with the structure of the roller cover 3 and in particular without adversely affecting the adhesion to the roller core 2 .
  • the known constructions of the roll covers 3 can be maintained.
  • the at least one Device 7, which serves to dissipate the charge connected via a conductive connection 8 with the roller core 2.
  • connection 8 can be connected directly to the roll core without passing through the intermediate layer 5, for example, by a sanding takes place at one end of the roll cover 3. This is indicated very schematically in FIG. 2.
  • the device 7 for discharging charge is formed in the embodiment in the form of a spiral arranged in the roll cover 3 wire-like structure. Due to the spiral arrangement of the at least one device 7, the derivative over the entire reference surface is ensured.
  • the device 7 can be arranged both between the functional layer 6 and the intermediate layer 5 as well as in any other positions. There are known a multiplicity of layer sequences in rolls 1, which may also have a functional layer 6 arranged directly on the roll core 2, which is underlaid only by a bonding agent layer 4. Then the device 7 is correspondingly formed on the adhesion promoter layer 4 below the functional layer 6. In any case, the at least one device 7 is in conductive connection with the functional layer 6.
  • the functional layer 6 is rendered electrically conductive in a known manner by means of conductive fillers or conductive nonwovens.
  • a wire material e.g. Copper, aluminum or silver are used.
  • the at least one intermediate layer 5 can be carried out in the usual way and functionality, which avoids problems with insulating intermediate layers.
  • the adhesion of the intermediate layer 5 to the roll core 2 is not impaired.
  • the electrical resistance of the roller cover 3 must be below 10 11 ohms to avoid electrostatic charge.
  • the device 7 may be formed in a plurality of variants.
  • an aluminum, silver or copper wire may be embedded in the roll cover 3, but it may also be a plastic thread provided with a suitably conductive coating, e.g. Made of polyester with silver coating, to derive the charge can be selected.
  • a single or multiple devices 7 are possible, which may be coupled together or formed individually to ground.
  • the electrical conductivity is lowered by alternative reinforcement in the functional layer 6, an intermediate layer 5 electrically connected to the roll core 2 and a known bonding layer 4.
  • Epoxy resin filled with inorganic fillers (-44%)

Landscapes

  • Rolls And Other Rotary Bodies (AREA)
  • Elimination Of Static Electricity (AREA)

Abstract

La présente invention concerne un rouleau (1) destiné à une machine de fabrication, de finition et/ou de façonnage d'une bande de matière fibreuse telle qu'une bande de papier, de carton ou de tissu. Le rouleau comprend un noyau de rouleau (2) et un revêtement de rouleau (3), formé sur le noyau (2), qui comprend au moins une couche. Le revêtement de rouleau (3) comporte au moins un dispositif (7), servant à évacuer des charges électriques, qui est en liaison de conduction avec un élément de mise à la terre qui se trouve à l'extérieur du rouleau (1).
EP14725040.1A 2013-05-17 2014-05-07 Rouleau pour machine de fabrication, finition et/ou façonnage d'une bande de matière fibreuse Withdrawn EP2997189A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013209172 2013-05-17
PCT/EP2014/059300 WO2014184064A1 (fr) 2013-05-17 2014-05-07 Rouleau pour machine de fabrication, finition et/ou façonnage d'une bande de matière fibreuse

Publications (1)

Publication Number Publication Date
EP2997189A1 true EP2997189A1 (fr) 2016-03-23

Family

ID=50736059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14725040.1A Withdrawn EP2997189A1 (fr) 2013-05-17 2014-05-07 Rouleau pour machine de fabrication, finition et/ou façonnage d'une bande de matière fibreuse

Country Status (3)

Country Link
EP (1) EP2997189A1 (fr)
CN (1) CN105209683A (fr)
WO (1) WO2014184064A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI716332B (zh) * 2020-08-10 2021-01-11 光群雷射科技股份有限公司 去除轉印滾輪的拆版線的方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3228607A1 (de) * 1982-07-30 1984-02-02 Rudolf Dipl.-Ing. 8036 Herrsching Dietl Walze, insbesondere papiermaschinenwalze
US5142759A (en) 1991-08-27 1992-09-01 Beloit Corporation Roll cover apparatus
DE19807712C2 (de) * 1998-02-24 2002-04-18 Freudenberg Carl Kg Verfahren zur Herstellung einer Oberflächenpanzerung auf einer Walze und Vorrichtung hierfür
DE102009029695A1 (de) * 2009-09-23 2011-03-31 Voith Patent Gmbh Walzenbezug
DE102010011401A1 (de) * 2010-03-15 2011-09-15 Oerlikon Textile Components Gmbh Umlenkrolle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014184064A1 *

Also Published As

Publication number Publication date
CN105209683A (zh) 2015-12-30
WO2014184064A1 (fr) 2014-11-20

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