EP2205791A1 - Toile de formation - Google Patents

Toile de formation

Info

Publication number
EP2205791A1
EP2205791A1 EP08804346A EP08804346A EP2205791A1 EP 2205791 A1 EP2205791 A1 EP 2205791A1 EP 08804346 A EP08804346 A EP 08804346A EP 08804346 A EP08804346 A EP 08804346A EP 2205791 A1 EP2205791 A1 EP 2205791A1
Authority
EP
European Patent Office
Prior art keywords
machine direction
yarns
binding
cross
machine
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
EP08804346A
Other languages
German (de)
English (en)
Other versions
EP2205791B1 (fr
Inventor
Petra Hack-Ueberall
H. Arved Westerkamp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40342354&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2205791(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2205791A1 publication Critical patent/EP2205791A1/fr
Application granted granted Critical
Publication of EP2205791B1 publication Critical patent/EP2205791B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths
    • D21F1/0045—Triple layer fabrics

Definitions

  • the invention relates to a paper machine wire, in particular forming wire, according to the preamble of patent claim 1.
  • the two fabric layers are held together either by binding machine direction or machine transverse direction threads.
  • a papermaker's fabric in particular a forming fabric, having an upper fabric layer and a lower fabric layer joined together by binding threads arranged in pairs, and at least one of the binder yarn pairs by machine direction yarns (binding machine direction yarns) and at least one other of the binder yarn pairs by machines - Querraumsfäden (binding machine transverse direction yarns) is formed.
  • connection between the fabric layers can be adapted to the stress states of the paper machine wire in the paper machine.
  • the connection of the fabric layer through the binding machine transverse direction yarns is not guaranteed to the required extent.
  • the binding machine direction threads take the firm connection between the fabric layers.
  • a particularly preferred embodiment of the invention provides that each of the pairs of binder yarns when weaving the upper fabric layer provides an upper weaving path, wherein the two binding threads of the pair of binder yarns during the weaving of the upper and lower fabric layers alternate, so that - during the first binding thread of the binder yarn pair the upper fabric layer weaves the second binder yarn of the binder yarn pair weaves the lower fabric layer and - while the second binding thread weaves the upper fabric layer weaves the first binding thread weaves the lower fabric layer and cross the two binding threads of the binder yarn pair to form exchange points when the first binding thread from Interweaving the upper fabric layer to weave the lower fabric layer and the second binder thread from interweaving the lower fabric layer to weave the upper fabric layer or vice versa.
  • each binder thread of the binder thread pair weaves during weaving of the upper fabric layer with a plurality of threads before this binder thread changes to weave the lower fabric layer.
  • the upper fabric layer provides the paper side and the lower fabric layer the running side of the papermaking fabric.
  • the upper fabric layer is formed only by interweaving binding machine direction yarns with binding CMD yarns.
  • Cross-machine direction yarns interwoven with binding machine straightening threads and lower machine direction threads.
  • the lower fabric layer comprises lower MD yarns interwoven with binding CMD yarns and lower CMD yarns.
  • the lower fabric layer includes both lower cross machine direction yarns and lower machine direction yarns
  • the lower fabric layer is formed by interweaving the lower machine direction yarns, the lower machine direction yarns, the binding cross machine direction yarns and the machine direction binding yarns.
  • the top fabric layer further comprises upper machine direction yarns and upper cross machine direction yarns interwoven with each other and with the binding cross machine direction yarns and with the binding machine direction yarns.
  • interweaving of the binder yarns continues the weave pattern formed by interweaving the upper MD yarns with the upper CMD yarns.
  • Such binding threads are called "structure-forming binding threads.” In this case, therefore, the weave pattern formed by the upper threads is not interrupted by the binding threads but is continued by the binding threads.
  • a further embodiment of the invention provides that the lower fabric layer comprises lower machine direction yarns and lower cross machine direction yarns, wherein the lower machine direction yarns are interwoven with bottom cross machine direction yarns and with binding cross machine direction yarns, and wherein the bottom CMD yarns are interlaced with lower machine direction yarns and binding machine direction yarns.
  • the binding machine direction yarns are interwoven with upper CMD yarns, lower CMD yarns and binding CMD yarns and / or that the binding CMD yarns are interwoven with upper machine direction yarns, lower machine direction yarns and binding machine direction yarns.
  • At least one upper machine direction thread is arranged between successive machine direction binding thread pairs.
  • no more than three upper machine direction threads are arranged between successive machine direction binding thread pairs.
  • an upper fabric layer with a regular structure is provided. Furthermore, the machine direction tensile stress need not only be absorbed by the machine direction binding thread pairs, but is also partially absorbed by the upper machine direction yarns. Furthermore, this provides a not too great distance between the machine direction binding thread pairs, whereby a firm connection between the fabric layers remains.
  • a further embodiment of the invention provides that at least one lower machine direction thread is arranged between successive machine direction binding thread pairs.
  • a further embodiment of the invention provides that at least one, in particular two, lower transverse machine direction yarns are arranged between successive cross-machine direction yarn binder pairs. Since the lower fabric layer generally provides the running side of the papermachine fabric, thereby the wear volume and thus the life of the paper machine fabric according to the invention is significantly increased.
  • the upper fabric layer forms a plain weave.
  • a paper machine screen is provided with a particularly mark-free paper page.
  • Replacement points often represent disruptions in the structure of the tissue, which is why at these points of replacement, the drainage behavior of the mesh often differs from the drainage behavior of the fabric adjacent to the replacement sites.
  • the different dewatering behavior leads to markings in the paper formed on the screen, which are particularly visible when they are regularly arranged, for example, in diagonals.
  • the weave pattern of the papermaking fabric repeats in rapports, wherein a Repeat 50 or more, in particular 72 or more cross-machine direction yarns and 30 or more, in particular 48 or more machine direction yarns.
  • the bottom CMD yarns have a larger diameter than the top CMD yarns and than the cross-machine direction binding yarns.
  • the wear volume of the non-load-receiving side CMD yarns is increased, whereby the wear resistance of the paper machine wire according to the invention is increased.
  • a specific development of the invention provides, in particular, for replacement points of consecutive machine direction binding thread pairs to be offset relative to one another within a repeat, with successive machine direction binding thread pairs whose relative positions are relatively are offset from one another by a first number of upper cross-machine direction web paths, there being successive machine direction thread pairs whose interchange points are offset relative to each other by a second number of upper web directional web paths and wherein the second number is different from the first number.
  • an embodiment of the invention provides, for example, that the offset within the repeat repeats as follows: between a first and a second machine direction binding thread pair, the offset of the exchange points is the first number,
  • the offset of the exchange points is the second number
  • - between a third and a fourth machine direction binding thread pair, the offset of the exchange points is the second number
  • the offset of the exchange points is the second number.
  • a concrete embodiment of the invention based thereon provides that the first number is six or more and the second number is eight or more.
  • a further development of the invention provides that, within a repeat, interchangeable locations of successive machine cross-directional binder thread pairs are offset relative to each other, there being successive cross-machine-fabric binder pairs whose interchange points are offset relative to each other by a third number of upper machine direction web paths wherein there are successive tie-shot pairs whose replacement locations are offset relative to each other by a fourth number of upper machine-direction extending web paths, and wherein the fourth number is different from the third number.
  • this may mean, for example, that the offset within the repeat repeats as follows,
  • the offset of the exchange points is the third number, - between the second and a third cross-machine tying yarn pair, the offset of the exchange points is the fourth number. More specifically, the third number is three or more and the fourth number is five or more.
  • the machine direction threads are preferably warp threads and the machine direction threads are weft threads.
  • Figure 1 shows the warp of a papermaker's fabric according to the invention
  • FIG. 2 shows the weft course of the paper machine wire according to the invention
  • FIG. 1 A first figure.
  • FIG 3 shows the arrangement of the exchange points of the paper machine wire of Figures 1 and 2 according to the invention.
  • Figure 4 shows a second embodiment of an inventive
  • Paper machine screen with a view of the paper side Paper machine screen with a view of the paper side.
  • FIG. 1 shows the course of the warp of a paper machine wire formed according to the invention as a forming fabric 100. Furthermore, FIG. 2 shows the weft thread course of the forming fabric 100.
  • the various weft threads are represented by circles.
  • the numbering of the weft threads corresponds to the numbering of the weft threads in FIG. 2.
  • the various warp threads are represented by circles.
  • the numbering of the warp threads corresponds to the numbering of the warp threads in FIG. 1.
  • Forming screen 100 comprises machine direction threads formed as warp threads 1-48 in a repeat and machine transverse direction threads formed as weft threads 1-72.
  • the warp threads 2, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42 and 46 lower warp threads "UK", - the warp threads 3 and 4, 7 and 8, 11 and 12, 15 and 16 , 19 and 20, 23 and 24, 27 and
  • the forming fabric 100 has an upper fabric layer 101 providing the paper side of the fabric 100, which is formed by interweaving the upper warp yarns OK, the upper weft yarns OS, the binding weft yarns sBS, and the binding warp yarns sBK.
  • the upper fabric layer 101 forms a plain weave.
  • the forming fabric 100 further has a lower fabric layer 102 providing the running side of the fabric 100 formed thereby by interweaving the lower warp yarns UK, the lower weft yarns US, the binding weft yarns sBS, and the binding warp yarns sBK.
  • the two fabric layers 101 and 102 are in this case according to the invention by the paired binding warp sBK and the paired binding weft sBS interconnected, wherein the binding threads of a pair of binder yarn (sBS pair and sBK pair) when weaving the upper fabric layer 101 together an upper weaving path in that each binder thread sBK or sBS of the binder thread pair alternately weaves the top 101 and bottom fabric layers 102, while the first binder thread of the binder thread pair weaves the top fabric layer 101, the second binder thread of the binder thread pair weaves the bottom fabric layer 102 and while the second binder thread the upper fabric layer weaves the first binder yarn weaves the lower fabric layer 102 and wherein the two binder yarns sBS, sBK of the binder yarn pair intersect to form exchange sites A when the first binder yarn interweaves the upper fabric layer 101 to weave the lower fabric layer 102 and the second binder yarn v om weaving the lower fabric layer 102 for weaving the upper fabric layer 101 and
  • each of the binding warp threads sBK weaves during the weaving of the upper fabric layer 101 with a plurality of upper weft threads OS and with several binding weft threads sBS before it changes at an exchange point for weaving the lower fabric layer 102.
  • each of the binding weft threads sBS interweaves with several during weaving of the upper fabric layer 101 upper warp yarns OK and with a plurality of binding warp yarns sBK before it changes at an exchange point for weaving the lower fabric layer 102.
  • binding threads sBK and sBS are also structure-forming binding threads, since they continue the weaving pattern formed by interweaving the upper warp threads with the upper wefts.
  • the binding warp sBK are woven with upper weft threads OS, with lower weft threads US and with binding weft threads sBS. Furthermore, the binding weft threads sBS are woven with upper warp yarns OK, with lower warp yarns UK and with binding warp yarns sBK.
  • an upper warp yarn OK is arranged between successive warp binder yarn pairs 1.sBK pair - 12.sBK pair.
  • a lower warp thread UK is arranged between successive warp binder thread pairs 1.sBK pair - 12.sBK pair.
  • two upper weft threads OS are arranged between successive weft binder thread pairs 1.sBS-pair - 12.sBS-pair, as between successive weft-thread-thread pairs 1.sBS-pair - 12.sBS-pair two lower weft threads are arranged US.
  • the order of arrangement here is as an example as follows: between a first pair of weft binder yarns, for example, 1.sBS pair and a subsequent second pair of weft binder yarns, for example, 2.sBS pair, the weft yarns are arranged in the following order,
  • the lower weft threads US have a larger diameter than the upper weft threads OS and the binding weft threads sBS.
  • FIG. 3 shows the arrangement of the exchange points of the forming fabric 100 according to the invention of FIGS. 1 and 2.
  • KettLitespar eg. 1.sBK pair and a second Kettbindefadenplo eg. 2.sBK pair is the offset of the exchange points X six upper extending in the weft weaving paths, for example.
  • Kettbindefadenschreib bspw. 2.sBK pair is the offset of the exchange points X eight upper extending in the weft weaving paths, for example.
  • Kettbindefadengorge bspw. 4.sBK pair is the offset of the exchange points X eight upper weft extending in the weft paths, for example. OS 12, 4.sBS pair, OS10, OS9 , 3.sBS pair, OS7, OS6, 2.sBS pair.
  • the exchange points O of successive weft thread pairs "sBS pairs" are offset relative to one another, the offset repeating in a 3-5 sequence, as can be seen from the following example:
  • the offset of exchange points O is three upper weaving paths extending in the warp direction, for example 2.sBK pair, OK5, 3.sBK- Pair,
  • FIG. 4 shows a second embodiment of a paper machine screen according to the invention, designed as a forming fabric 110, with a view of the upper fabric layer 111 providing the paper side.
  • the upper fabric layer 111 of the forming fabric 110 forms a plain weave.
  • the connection between the upper fabric layer 111 and the lower fabric layer of the forming fabric 110, not shown, is provided by binding warp threads sBK arranged in pairs and by pairwise binding weft threads sBS, wherein the binding threads sBK or sBS of a binder thread pair together weave the upper fabric layer 111 provide upper weave path by weaving each binder thread sBK or sBS of the binder thread pair alternately the upper and the lower fabric layer.
  • the upper fabric layer 111 is formed by upper warp yarns OK, upper weft yarns OS, the binding warp yarns sBK and the binding weft yarns interwoven with each other.
  • the interweaving of the binding threads sBS and sBK, respectively, continues the weaving pattern formed by interweaving the upper warp yarns OK with the upper weft yarns OS.
  • the binding threads sBS and sBK are therefore "structure-forming binding threads.”
  • the replacement points of each pair of binder threads having the first binding thread sBS and sBK of the pair, interweaving the upper fabric layer 111 for interweaving the lower fabric layer and the second binder thread sBS or sBK of the pair from weaving the lower fabric layer for weaving the upper fabric layer 1 11 and vice versa are hereby characterized by circles.
  • the exchange points of the binding weft threads sBS of a pair are represented by light circles and the exchange points of the binding warp threads sBK of a pair by dark circles.
  • the number of running-side bonding points formed per unit area by cross-machine direction yarn pairs is less than the number of running-side bonding dots formed per unit area by machine-direction yarn pairs.
  • Forming wire 110 formed papermaking machine has a very high stiffness in the cross-machine direction, but in the machine direction has the flexibility required for wrapping of at least one roller at high speeds.
  • the respective thread pair can of course also be a thread triplet, etc.
  • the binding threads are arranged symmetrically, that is, that the binding point on the
  • Paper page is running. However, other binding sequences can be used in which other courses are realized. This can then be expressed in different binder thread weft ratios or binder thread warp ratios.

Landscapes

  • Woven Fabrics (AREA)
  • Paper (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Medicinal Preparation (AREA)

Abstract

L'invention concerne une toile de machine à papier, notamment une toile de formation, présentant une face supérieure et une face inférieure de tissu, ces faces étant reliées entre elles par des fils de liaison disposés par paires. L'invention est caractérisée en ce qu'au moins une des paires de fils de liaison est formée par des fils de sens machine (fils de liaison sens machine) et au moins une autre paire de fils de liaison est formée par des fils transversaux au sens machine (fils de liaison sens travers).
EP08804346A 2007-09-21 2008-09-18 Toile de formation Revoked EP2205791B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007046113A DE102007046113A1 (de) 2007-09-21 2007-09-21 Formiersieb
PCT/EP2008/062402 WO2009040284A1 (fr) 2007-09-21 2008-09-18 Toile de formation

Publications (2)

Publication Number Publication Date
EP2205791A1 true EP2205791A1 (fr) 2010-07-14
EP2205791B1 EP2205791B1 (fr) 2011-02-16

Family

ID=40342354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08804346A Revoked EP2205791B1 (fr) 2007-09-21 2008-09-18 Toile de formation

Country Status (7)

Country Link
US (1) US8312900B2 (fr)
EP (1) EP2205791B1 (fr)
CN (1) CN101868577A (fr)
AT (1) ATE498737T1 (fr)
DE (2) DE102007046113A1 (fr)
ES (1) ES2359480T3 (fr)
WO (1) WO2009040284A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9528223B2 (en) 2013-06-18 2016-12-27 Andritz Technology & Asset Management Gmbh Paper machine wire

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007046113A1 (de) * 2007-09-21 2009-04-02 Voith Patent Gmbh Formiersieb
EA036317B1 (ru) 2013-11-14 2020-10-26 Джиписипи Айпи Холдингз Элэлси Способ изготовления бумажного изделия и бумагоделательная машина
CN106460332A (zh) * 2016-03-23 2017-02-22 许长云 一种经线自绑定成形网
JP7515443B2 (ja) * 2021-07-21 2024-07-12 日本フイルコン株式会社 工業用織物

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See references of WO2009040284A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9528223B2 (en) 2013-06-18 2016-12-27 Andritz Technology & Asset Management Gmbh Paper machine wire

Also Published As

Publication number Publication date
ES2359480T3 (es) 2011-05-24
DE102007046113A1 (de) 2009-04-02
WO2009040284A1 (fr) 2009-04-02
US8312900B2 (en) 2012-11-20
DE502008002645D1 (de) 2011-03-31
ATE498737T1 (de) 2011-03-15
CN101868577A (zh) 2010-10-20
US20100236741A1 (en) 2010-09-23
EP2205791B1 (fr) 2011-02-16

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