EP2470716A1 - Toile de formation de feuille - Google Patents

Toile de formation de feuille

Info

Publication number
EP2470716A1
EP2470716A1 EP11725359A EP11725359A EP2470716A1 EP 2470716 A1 EP2470716 A1 EP 2470716A1 EP 11725359 A EP11725359 A EP 11725359A EP 11725359 A EP11725359 A EP 11725359A EP 2470716 A1 EP2470716 A1 EP 2470716A1
Authority
EP
European Patent Office
Prior art keywords
threads
longitudinal
fabric layer
thread
fabric
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
EP11725359A
Other languages
German (de)
English (en)
Other versions
EP2470716B1 (fr
Inventor
Wolfgang Heger
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.)
Andritz Technology and Asset Management GmbH
Original Assignee
Andritz Technology and Asset Management 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
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Application filed by Andritz Technology and Asset Management GmbH filed Critical Andritz Technology and Asset Management GmbH
Priority to PL11725359T priority Critical patent/PL2470716T3/pl
Publication of EP2470716A1 publication Critical patent/EP2470716A1/fr
Application granted granted Critical
Publication of EP2470716B1 publication Critical patent/EP2470716B1/fr
Active legal-status Critical Current
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Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D25/00—Woven fabrics not otherwise provided for
    • 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
    • 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

Definitions

  • the invention relates to a multi-ply web forming screen as used in the papermaking process in the sheet forming zone of a wet end of a paper machine for dewatering a pulp suspension.
  • Paper machine screen takes place. Under pulp suspension is one in water
  • the water content is reduced by the above-mentioned filtration process to about 80%.
  • the paper fibers as well as the filling and auxiliary materials remain
  • strainers have different trained sides, which are adapted to the particular purpose.
  • Such strainers have a paper side from the top of a
  • Sieboberseite The paper page is commonly referred to as Sieboberseite and is responsible for the formation of the paper sheet.
  • these sieves have a running side, from the bottom of a Lower tissue is formed.
  • the running side which can also be referred to as Siebunterseite, comes with the
  • the respective screen side has a machine direction and a transverse direction, wherein under the machine direction (in English MD for "machine direction"), the direction of the paper web and thus also the direction of the paper machine screen
  • Paper machine wire is 90 ° rotated direction, i. the arranged transversely to the direction of the paper and the screen direction. Due to the very special construction modern
  • paper machine screens can not be interchanged paper and running side, nor machine and transverse direction, otherwise the functioning of the screen is not or not sufficiently guaranteed.
  • the threads are connected in a particularly intimate and uniform manner to a tissue.
  • the plain weave is for the formation of a paper sheet and thus for the paper side, so little is it usually suitable for the running side. If a paper machine screen is equipped with a canvas paper side, it may therefore be advisable to provide a second, the running side of the screen forming fabric layer below the plain weave, which is sufficient for the screen
  • a particular challenge is the connection of the two layers (i.e., the paper side forming
  • Plain weave has unfavorable conditions for such a layer connection.
  • different approaches for the connection of two fabric layers are described, of which one approach provides for the use of additional, separate binding threads, which extend in the longitudinal or transverse direction. According to this approach, two finished, fully formed fabric plies over separate, non-woven binding threads
  • the two fabric layers consist of longitudinal threads and transverse threads, which run exclusively in the respective fabric layer and thereby the respective fabric layer pattern or the e election
  • Bindeschussfäden be used, which with warp threads of the Tie upper and warp threads of the lower fabric, and DE 39 28 484 AI, are used in the separate warp threads as connecting threads. Further examples can be found in DE 42 29 828 A1, WO 93/00472 and EP 0 136 284 A2.
  • the separate binding threads are usually made thinner than the respective fabric layer forming threads (see, for example, CA 1 115 177 AI), since the binding threads must be entered in addition to the fabric-forming threads in the fabric structure, especially in the plain weave little space for such separate Binding threads is provided.
  • the originally homogeneous structure of the binding would be disturbed by the binding threads, so that in particular in the provided on the paper side plain weave defects would be created that cause marks in the paper.
  • the thin binding threads are mainly used for
  • transverse threads which interact as a so-called functional transverse thread pair.
  • the two transverse threads of a functional pair can form a virtually uninterrupted transverse thread of a paper-like plain weave, ie an upper composite transverse thread.
  • Those thread sections of the functional pair that are not needed for the formation of the paper-side virtually uninterrupted cross-thread, run inside the tissue and can be used to attach the lower tissue to the upper tissue.
  • the lower part of the weave adjoining thread section for example
  • Upper fabric forming transverse threads may have the same diameter, whereby the uniformity of the paper side can be increased. Furthermore, the material use in
  • cross-oriented binding threads are slightly moved in the tissue, which also creates friction between them and the threads integrated in one layer and thus wear.
  • Another alternative is the connection of the layers by so-called. Functional longitudinal thread pairs. Be the two
  • Machine direction threads push these fabrics with regard to marking in the paper, water content in the fabric and
  • Fiber support to its limits and can hardly be used for light weight, graphic papers.
  • EP 0 069 101 and EP 093 096 also show a
  • EP 1 767 692 A2 discloses a multi-ply fabric in which a paper-side plain weave is tied to a running side four-shaft weave. In the upper fabric are alternately a running upper fabric exclusively in the upper fabric
  • Longitudinal thread which is located below the upper composite longitudinal thread and runs exclusively in the lower fabric.
  • the lower fabric is made entirely of lower transverse threads and formed lower longitudinal threads and is by the
  • the fabric has a longitudinal thread repeat of eighteen longitudinal threads, three of which are formed as upper longitudinal threads and nine as lower longitudinal threads, with the remaining six longitudinal threads forming three functional pairs.
  • a longitudinal thread ratio of 2: 3 (6: 9) or 1: 2 (6:12) (if you consider the paired juxtaposed lower longitudinal threads as each exactly one lower longitudinal thread so there is a ratio of 1: 1 (6: 6) or 2: 3 (6: 9)).
  • WO 2004/085740 A2 shows a fabric with a longitudinal thread repeat of 20 threads, which are distributed over four upper longitudinal threads, four functional pairs and eight lower longitudinal threads.
  • the fabric shown in WO 2004/085741 AI has a longitudinal thread repeat of 16 threads, which are distributed over four upper longitudinal threads, four functional pairs and four lower longitudinal threads, so that a
  • Longitudinal thread repeat consists of four upper longitudinal threads, twelve lower longitudinal threads and four functional pairs (ie a longitudinal thread repeat of 24 threads).
  • the upper chains and the Functional pairs form a paper-side canvas, which, with the help of functional pairs, forms a canvas
  • EP 1 527 229 B1 and EP 1 220 964 B1 each disclose a triplet warp thread composed of three warp threads, the warp threads of which run in each case in the upper fabric and in the lower fabric.
  • Object of the present invention is a
  • Sheet forming screen made of a multi-layered fabric
  • Stability has a low Markierne Inc. and a stable layer connection.
  • the invention a
  • the sheet forming screen is made of a
  • formed multi-layer fabric which has a longitudinal thread repeat of sixteen longitudinal threads, of which four longitudinal threads as upper longitudinal threads and eight longitudinal threads as lower longitudinal threads
  • the remaining four longitudinal threads form two functional longitudinal thread pairs of two longitudinal threads arranged side by side.
  • each of the four longitudinal threads which are the two functional
  • Fabric layer is securely connected to the lower fabric layer.
  • the upper longitudinal threads together with transverse threads running in the upper fabric layer partially form the binding of the upper ones
  • Fabric layer (this is, for example, the paper-side binding), the eight lower longitudinal threads, together with extending in the lower fabric layer transverse threads partially form the binding of the lower fabric layer (this is, for example, the running side
  • Functional pairs form two upper composite longitudinal threads and two lower composite longitudinal threads, which fit into the respective weave pattern.
  • at least one of the four longitudinal threads, which form the two functional longitudinal thread pairs extends both in the upper fabric layer and in the lower fabric layer, whereby the upper fabric layer is connected to the lower fabric layer.
  • Those longitudinal threads of the two longitudinal thread pairs which do not run in both fabric layers, run alternately in the upper layer and between the two layers, ie alternately in the upper layer and in the fabric interior.
  • all four longitudinal threads which form the two functional longitudinal thread pairs, both in the upper fabric layer and in the lower fabric layer so that a reliable connection of the fabric layers is ensured.
  • the upper longitudinal threads together with transverse threads running in the upper fabric layer partially form the binding of the upper ones
  • Fabric layer (this is, for example, the paper-side binding), and the eight lower longitudinal threads together with transverse threads running in the lower fabric layer already fully form the binding of the lower fabric layer (this is, for example, the side binding).
  • Longitudinal thread pairs complete the binding of the upper fabric layer alternately.
  • the longitudinal threads of the two functional pairs thus form two upper composite longitudinal threads, which complete the binding of the upper fabric layer.
  • the at least one longitudinal thread which extends in both the lower and in the upper fabric layer binds, the lower fully formed by the lower longitudinal threads
  • Binding thread acting to thereby the lower fabric layer to connect with the upper fabric layer This has the advantage of an increased number of binding points and thus a stronger layer connection.
  • the two threads of a functional pair in the latter case, the same thread length, resulting in a uniform interweaving.
  • connection of the upper layer with the lower layer thus takes place (at least in part) via functional longitudinal thread pairs, which is the advantages described above with respect to a layer connection by means of separate
  • the forming of the invention can be produced with a weaving machine, which is equipped with a shaft package of sixteen shafts and two warp beams (when the longitudinal threads are formed by warp threads).
  • the sixteen longitudinal threads can be divided into two warp beam units of eight threads each, wherein the first unit comprises the eight lower longitudinal threads of the respective rapport, and wherein the second unit comprises the remaining eight longitudinal threads of the respective repeat.
  • Kettbäumen equipped loom is needed for the production of a variety of other tissues / sieves, so that the inventive sieve can be easily produced with an existing loom. Ie, for the production of the Siebes invention, it is not necessary to turn off a separate loom or existing
  • Longitudinal threads results in a ratio of upper longitudinal threads to lower longitudinal threads of 4: 8 or 1: 2.
  • Each of the four longitudinal threads of the two functional pairs of the lower or the upper fabric layer can be attributed to each of the four longitudinal threads of the fabric, since these four longitudinal threads contribute to fabric formation in both layers and form two composite longitudinal threads in each case, so that a total of a Leksfadenverphasel nis of 6: 10 or 3: 5 results.
  • Fiber support assets A more cross-oriented paper side of the screen thus offers a better
  • Fiber support The comparatively large number of lower longitudinal threads is similar to one with the formation of the
  • Machine direction i. the reduction of the paper-side longitudinal threads caused reduction of
  • exactly two upper longitudinal threads and / or exactly four lower longitudinal threads are always arranged in the fabric between two functional longitudinal thread pairs, resulting in a particularly uniform
  • the upper longitudinal threads and the longitudinal threads of the functional pairs have substantially the same diameter. If the longitudinal threads are formed by warp threads, the upper longitudinal threads and the longitudinal threads of the functional pairs can therefore be wound onto a common warp beam.
  • the diameter of the lower longitudinal threads may be e.g. be equal to the diameter of the upper longitudinal threads and the longitudinal threads of the functional pairs (in particular in the first embodiment of the
  • the diameter of the lower Longitudinal threads are larger than the diameter of the upper ones
  • Transverse threads formed which are arranged exclusively in the upper fabric, and / or all in the lower fabric
  • transverse threads are formed as lower transverse threads, which are arranged exclusively in the lower fabric.
  • the transverse threads running in the lower fabric layer may e.g. have a larger diameter than the transverse threads running in the upper fabric layer.
  • the ratio of transverse threads running in the upper fabric to transverse threads running in the lower fabric may be e.g. greater than 1, e.g. at least or exactly 2: 1 or e.g. at least or exactly 3: 2.
  • the four longitudinal threads of the two functional pairs form two lower composite longitudinal threads, which are considered as two lower longitudinal threads for the designation / assessment of the second binding) or a 4-shaft bond ⁇ in particular in the second embodiment / alternative of Invention)
  • 4-shaft binding or 5-shaft binding means that the binding can be produced with 4 or 5 shafts, in other words, the repeat of such a binding has 4 or 5 warp threads or longitudinal threads.
  • the invention is not limited to a particular binding of the upper tissue or a specific binding of the lower tissue.
  • upper fabric and lower fabric may also have the same binding, eg a plain weave. Further variations of the inventive sieve will become apparent from the following description of exemplary
  • longitudinal yarns threads of the screen / fabric are referred to, which are arranged in the running direction of the paper machine.
  • the longitudinal threads are formed by the warp threads of the loom.
  • Round fabrics realize the longitudinal threads with the shots.
  • transverse threads threads of the screen / fabric are referred to, which are arranged transversely to the direction of the paper machine.
  • the transverse threads are formed by the shots.
  • Round fabrics realize the transverse threads with the chains of the loom.
  • the fabric layer is understood to mean a single-layer fabric consisting of transverse threads and longitudinal thread (or chains and wefts).
  • Paper fiber layer is formed.
  • the upper fabric is on the "logical top” of the screen.
  • Upper longitudinal threads are such threads, which are exclusively in the upper fabric and there with in the upper fabric
  • Upper transverse threads are those threads which are exclusively in the upper fabric and are interwoven there with the upper longitudinal threads (as well as the longitudinal threads of the functional pairs). Upper transverse threads never leave the upper fabric, i. they do not change into the lower tissue.
  • Lower longitudinal threads are those threads that are exclusively in the lower tissue and there with in the lower tissue
  • Lower longitudinal threads never leave the lower tissue, ie they do not change into the upper tissue.
  • Lower transverse threads are those threads which are located exclusively in the lower fabric and there are interwoven with the lower longitudinal threads (in the first embodiment of the invention also with the longitudinal threads of the functional pairs). Lower transverse threads never leave the lower tissue, ie they do not change into the upper tissue.
  • a functional longitudinal thread pair consists of two directly adjacent longitudinal threads whose position in
  • Sieve / tissue is not limited to a fabric layer, i.
  • the longitudinal threads of a functional pair do not run exclusively in a fabric layer.
  • both longitudinal threads of a functional longitudinal thread pair extend in both the lower and upper tissues, i. the longitudinal threads of a longitudinal thread pair change between upper and lower fabric layer (in the first embodiment of the invention and in an alternative of the second embodiment of
  • one or both longitudinal threads of a functional pair can also change between one of the two layers and the tissue interior (according to a second alternative of the second embodiment).
  • the two threads of a functional pair jointly perform both the function of an upper longitudinal thread (e.g., a top chain) and a lower longitudinal thread (e.g., a lower chain) and additionally join the different layers of fabric through their course.
  • An upper longitudinal thread thus formed and a lower longitudinal thread formed in this way can also be referred to as "upper or lower
  • Ausges tion of the invention meet the two threads of a functional pair together the task of an upper tissue-owned longitudinal thread ("upper composite longitudinal thread") and possibly a lower non-woven binding thread.
  • a longitudinal thread repeat is the smallest repeating unit of longitudinal threads in the fabric. If the longitudinal threads are formed by warp threads, then the number of threads of the longitudinal thread repeat corresponds to the number of shafts needed to manufacture the fabric.
  • FIG. 1 shows a schematically illustrated, complete repeat of a fabric according to the present invention in a perspective view, wherein the upper fabric layer with (A) and the lower fabric layer with (B) is designated,
  • FIG. 3 shows an end view of the fabric from FIG. 1 (the cross-sectional area of the longitudinal threads and the transverse thread course can be seen)
  • FIG. 4 shows a perspective view of the fabric from FIG.
  • Fig. 5 is a schematic plan view of the paper side of the fabric of Fig. 1, wherein the underlying
  • Running side is omitted, 5a shows the weave pattern of the upper fabric, wherein the binding points at which an upper transverse thread is bound by an upper longitudinal thread or an upper composite longitudinal thread are marked with an "x",
  • FIG. 6 is a schematic plan view of the lower fabric layer of the fabric of FIG. 1 (without paper side thereover), FIG.
  • 6a shows the weave pattern of the lower weave, wherein the binding points at which a lower transverse thread is bound by a lower longitudinal thread or a lower composite longitudinal thread are marked with an "x",
  • Fig. 7 is a schematic plan view of the entire fabric of Fig. 1, i. a view from above of both the paper side (upper fabric) and the underlying running side (lower fabric), including the change points of the functional pairs,
  • Fig. 8 is a schematic view concerning the
  • Fig. 9 is a schematic plan view of the upper
  • Fig. 9a the weave pattern of the upper fabric, wherein the binding points, where an upper transverse thread of a upper longitudinal thread or an upper composite longitudinal thread
  • Fig. 10 is a schematic plan view of the lower fabric layer of the multi-layer fabric according to the second
  • Fig. 10a the weave pattern of the lower fabric, wherein the binding points at which a lower transverse thread is bound by a lower longitudinal thread, marked with an "x”, and wherein the attachment parts, where the
  • Sub-tissue is connected to the upper tissue by means of a longitudinal thread of a functional longitudinal thread pair, marked with a, and
  • Fig. 11 is a schematic end view of the fabric according to the second embodiment of the invention.
  • Figures 1 to 7 show a fabric according to a first embodiment of the invention.
  • the fabric is a multi-ply fabric and may be e.g. be used as a sieve, e.g. as a forming screen as needed in the papermaking process.
  • the upper fabric layer is identified by the reference numeral (A), whereas the lower fabric layer is indicated by the reference symbol (B).
  • the top layer may e.g. forming the paper side of a screen, and the bottom layer may e.g. forming the running side of the sieve.
  • the longitudinal threads can be formed, for example, by warp threads, and the transverse threads can be formed, for example, by weft threads.
  • the fabric shown can thus be provided with a number of sixteen shafts (corresponding to the number of shafts)
  • the eight longitudinal threads 11, 12, 13 and 14 run exclusively in the upper fabric layer (see for example Fig. 5) and are therefore referred to as upper longitudinal threads in the following.
  • the four longitudinal threads 21, 22, 23 and 24, which form the two functional pairs, run both in the lower fabric layer and in the upper fabric layer, respectively. These four longitudinal threads 21, 22, 23 and 24 alternate between the upper and lower fabric layers.
  • precisely one of the two longitudinal threads of a functional one is always located Couple on the paper side. That is, when a first of the two longitudinal threads of a pair is on the paper side, the other of the two longitudinal threads of the
  • the two functional pairs 21, 22 and 23, 24 thus form two "upper composite longitudinal threads."
  • the upper fabric layer thus has four upper longitudinal threads and two upper ones per repeat
  • Embodiment exactly two upper longitudinal threads 12, 13 are arranged between the two functional pairs 21, 22 and 23, 24 or between the two composite longitudinal threads.
  • the change between the longitudinal threads of a longitudinal thread pair takes place below an upper transverse thread (and above the lower transverse threads, as can be seen in FIG. 6, ie between lower and upper layer or inside the fabric).
  • Change points are indicated in Figures 5 and 6 with AI, A2, Bl and B2.
  • the change points of one functional pair are offset relative to the change points of the other functional pair by three upper transverse threads.
  • FIG. 5a shows the weave pattern of the upper fabric, it being easy to see how the two longitudinal threads 21, 22 together form an upper composite longitudinal thread that fits into the binding pattern of the paper side, ie the upper one
  • Composite longitudinal thread 21, 22 replaces an upper longitudinal thread that would otherwise be required to form the paper-side plain weave.
  • the same applies to the longitudinal threads 23, 24th Such as. 6 can be seen according to this embodiment is always exactly one of the two longitudinal threads of a functional pair on the running side. That is, when a first one of the two longitudinal threads of a pair is on the running side, the other of the two longitudinal threads is on the paper side. As soon as one of the pair's longitudinal threads leaves the running side, the other one steps
  • the lower fabric layer has eight lower longitudinal yarns per repeat and two lower composite longitudinal yarns (see FIG. 6). According to this
  • the twenty transverse threads 101 to 120 of the upper layer have a smaller diameter than the ten transverse threads 201 to 210 of the lower layer.
  • the twenty transverse threads 101 to 120 run exclusively in the upper fabric layer, and the ten transverse threads 201 to 210 run exclusively in the lower fabric layer. That is, none of the transverse threads 101 to 120 changes to the running side, and none of the transverse threads 201 to 210 changes to the paper side.
  • the transverse threads 101 to 120 therefore as upper transverse threads and the
  • lower transverse threads Querfäden 201 to 210 referred to as lower transverse threads. It should be noted, however, that the invention is not restricted either to the number of upper and lower transverse threads shown or to the ratio of upper transverse threads to lower transverse threads shown (in this case 2: 1). Also, the diameter of the upper transverse threads may be e.g. equal to or greater than the diameter of the lower transverse threads.
  • the four upper longitudinal threads 11-14 and the two upper composite longitudinal threads formed by the two functional pairs 21, 22 and 23, 24 together with the twenty upper transverse threads 101-120 form the paper side and the upper one, respectively Fabric layer made a plain weave.
  • Longitudinal thread 11 is offset by an upper transverse thread. That is, while the upper longitudinal thread 11 extends over the upper transverse thread 101 and under the upper transverse thread 102, the upper composite longitudinal thread 21, 22 extends below the upper
  • the upper longitudinal thread 12 and the upper composite longitudinal thread 23, 24 have the same course as the upper longitudinal thread 11, and the course of the upper longitudinal threads 13 and 14 with respect.
  • the upper transverse threads 101-120 corresponds to that of the upper one
  • Running side or in the lower fabric of a 5-shaft binding is only one of several possible
  • Embodiments i. it may also be provided other run-side bindings, although the shown
  • each of the lower longitudinal yarns 31-38 and lower composite longitudinal yarns 21, 22 and 23, 24 binds exactly two lower transverse yarns and floats over them
  • the Sequence / sequence is "over four lower transverse threads, below a lower transverse thread.” For example, binds the lower
  • the pitch of the 5-bar weave shown in FIG. 6 is two or two lower transverse threads. That , the next longitudinal thread 32 (i.e., to the lower longitudinal thread 31
  • Composite longitudinal thread 21, 22 binds the lower transverse threads 205 and 210, and so on.
  • the 5-shaft bond formed by the lower longitudinal threads 31, 32, 33, 34 and the lower composite longitudinal thread 21, 22 is defined by the lower longitudinal threads 35, 36, 37 , 38 and the lower composite longitudinal thread 23, 24 repeated.
  • both the binding of the upper fabric layer and the binding of the lower fabric layer by the two functional pairs 21, 22 and 23, 24 are completed. That is, the longitudinal threads 21, 22, 23, 24 (e.g., warp threads) are associated with both the upper transverse threads (e.g., topsheets) and the lower ones
  • Cross threads e.g., shots interlaced to complete the respective fabric or bond.
  • the two functional pairs 21, 22 and 23, 24 contribute to the formation of the respective binding, in the embodiment shown to the paper side
  • the paper side and the running side are connected to each other by the two functional pairs 21, 22 and 23, 24.
  • the longitudinal threads of the two functional pairs 21, 22 and 23, 24 serve as textile threads in the lower fabric and in the upper fabric and at the same time act as binding threads.
  • the filaments of the functional pairs according to this embodiment become more essential both in the lower fabric and on the running side and in the upper fabric and on the paper side, respectively
  • Component of the respective tissue used. Their integration into the respective tissue not only serves to connect the lower tissue to the upper tissue but also to form functional binding points within the respective tissue.
  • the thread 21 changes up to engage the upper transverse threads 114, 116, 118 and 120, thereby completing the paper-side plain weave.
  • the two longitudinal threads 21 and 22 alternately complete the paper-side weave (in this embodiment a plain weave) and the back-side weave (a 5-shank weave in this embodiment).
  • 5 shows the two layers shown separately in FIG. 5 and FIG. 6 in an "assembly" drawing, both layers being seen from above, the upper layer representing the paper side of a sheet forming screen.
  • Tissue is essentially always an upper longitudinal thread between two lower longitudinal threads.
  • the upper longitudinal thread 11 is in plan view substantially between the two lower longitudinal threads 31, 32, the upper longitudinal thread 12 is located in
  • the upper longitudinal thread 13 lies substantially between the lower longitudinal threads 35, 36, and the upper longitudinal thread 14 is located substantially between the lower longitudinal threads 37, 38.
  • Machine direction / longitudinal direction is smaller than in
  • Composite longitudinal threads (resulting from the longitudinal thread ratio of 6: 10 or 3: 5) favors.
  • Such transverse meshes allow a convenient support / support in the
  • Fiber suspension contained fibers.
  • Machine direction are compensated.
  • an upper transverse thread is arranged in plan view over each lower transverse thread.
  • an upper transverse thread is always arranged between two lower transverse threads. This results in a ratio of upper to lower transverse threads of 20:10 or 2: 1. However, as explained above, this ratio can be varied.
  • the diameter of the upper longitudinal threads 11-14 is equal to the diameter of the threads 21-24 of the functional pairs.
  • the uniformity of the paper side is only slightly affected by the four change points AI, A2, Bl and B2 of the two functional pairs.
  • the diameter of the lower longitudinal threads 31-38 may be, for example, equal to the diameter of the upper longitudinal threads 11-14 and the threads 21-24 of the functional pairs according to the embodiment shown in FIGS. 1-7, whereby a smooth running side can be obtained which only is interrupted by the four change points AI, A2, Bl and B2.
  • Figures 1, 3 and 4 show three-dimensional views of the described fabric or sheet forming screen.
  • Figure 8 shows a schematic representation of a loom for the production of the fabric of Figures 1 to 7. Shown are two warp beams XI and X2. The first warp beam XI carries the lower longitudinal yarns, and the second warp beam X2 carries the upper longitudinal yarns and the longitudinal yarns of the functional pairs. Of course, only a small portion of the two warp beams shown in Figure 8 (corresponding to a
  • the 16 longitudinal yarns are divided into two units of 8 yarns each, with each unit associated with its own warp beam XI and X2 respectively, and with the yarns individually ranked in the shafts X3 of the loom according to their function. This results in a logical assignment of the warp threads according to their function, which was explained above.
  • Shaft packet X3 in conjunction with two XI and X2 warp beams can be made of a variety of different tissues, especially those tissues in which the connection of upper and lower tissue via functional
  • FIG. 9 show a multi-ply fabric according to a second embodiment of the invention, which can be used, for example, as a sieve, for example as a forming fabric as needed in the papermaking process.
  • the upper fabric layer is in plan view
  • Figure 10 shows the lower fabric layer in plan view.
  • Figure 11 shows an end view of the multi-ply fabric.
  • Longitudinal threads can e.g. be formed by warp threads, and the transverse threads may e.g. be formed by weft threads.
  • the fabric according to the second embodiment can thus be made, like the fabric according to the first embodiment, with a number of sixteen shafts, i. e.g. with the arrangement shown in FIG.
  • the sixteen longitudinal threads are on the lower one as follows
  • the four longitudinal threads 11, 12, 13 and 14 are formed as upper longitudinal threads and extend exclusively in the upper
  • Paper side or in the upper fabric layer is the other of the two longitudinal thread of the functional pair in the interior of the fabric ⁇ ie between the upper and lower layer) or in the lower fabric layer. As soon as the one longitudinal thread of the functional pair leaves the paper side, the other longitudinal thread comes in its place and runs on the
  • each longitudinal thread of a functional pair extends over a distance of five upper transverse threads on the paper side, thereby incorporating three transverse threads.
  • the two functional pairs 21, 22 and 23, 24 thus form two "upper composite longitudinal threads", so that the upper fabric layer per longitudinal thread repeat of the fabric has four upper longitudinal threads and two upper longitudinal threads
  • Composite longitudinal threads has. According to this embodiment, exactly two upper longitudinal threads 12, 13 are arranged between the two functional pairs 21, 22 and 23, 24 or between the two composite longitudinal threads.
  • the longitudinal thread change of the first longitudinal thread pair 21, 22 takes place below the upper transverse threads 101 and 107, that of the second longitudinal thread pair
  • Reference numerals AI, A2, Bl and B2 denotes.
  • the Changing points of one functional pair are offset from the change points of the other functional pair by three upper transverse threads. As can be seen from FIGS. 10 and 10a, that longitudinal thread section of a functional thread binds
  • Fabric layer is located, the lower fabric layer to the upper
  • Fabric layer by by at least one (in the example shown exactly below) underneath a lower transverse thread (in the plan view of the lower fabric layer) and thereby binds.
  • the longitudinal thread of the functional longitudinal thread pair which binds the lower fabric acts as a separate, "fabric-foreign" bonding thread with respect to the lower fabric, that is to say that
  • Sub-fabric tying thread does not contribute to the formation of the running side binding or to the formation of the lower tissue. That is, according to this embodiment, the two functional pairs 21, 22 and 23, 24 do not constitute "lower" ones
  • each Cross thread per running side rapport (Figure 10 shows four repeats of the running side binding, see below) involved exactly twice, with the connected by the functional pair 21, 22 lower transverse threads 203, 207 are already involved by the lower longitudinal threads 32, 33 twice Fabric layer thus has per longitudinal thread repeat of Tissue exactly eight lower longitudinal thread.
  • exactly four lower longitudinal threads 33, 34, 35, 36 are arranged between the two functional pairs 21, 22 and 23, 24.
  • transverse threads 101 to 112 are assigned to the upper fabric layer and eight transverse threads 201 to 208 to the lower fabric layer.
  • the twelve transverse threads 101 to 112 of the upper layer have a smaller diameter than the eight transverse threads 201 to 208 of the lower layer.
  • the twelve transverse threads 101 to 112 of the upper layer have a smaller diameter than the eight transverse threads 201 to 208 of the lower layer.
  • Cross threads 101 to 112 are formed as upper transverse threads and extend exclusively in the upper fabric layer, and the eight transverse threads 201 to 208 are formed as lower transverse threads, which extend exclusively in the lower fabric layer. That is, none of the transverse threads 101 to 112 change to the running side and the lower fabric layer, respectively, and none of the transverse threads 201 to 208 change to the paper side and the upper fabric layer, respectively. It is noted that the
  • Transverse threads e.g. equal to or greater than the diameter of the lower transverse threads.
  • Course of the upper composite longitudinal thread 21, 22 is opposite the course of the upper longitudinal thread 11 offset by exactly one upper transverse thread.
  • the upper longitudinal thread 12 and the upper composite longitudinal thread 23, 24 have the same course as the upper longitudinal thread 11, and the course of the upper longitudinal threads 13 and 14 corresponds to the course of the upper composite longitudinal thread 21, 22nd
  • each of the upper longitudinal thread and upper composite longitudinal thread binds every other upper transverse thread in the
  • each of the eight lower longitudinal threads 31 - 38 runs alternately above and below a lower transverse thread and thereby binds exactly four lower transverse threads.
  • the lower longitudinal threads 31 - 38 runs alternately above and below a lower transverse thread and thereby binds exactly four lower transverse threads.
  • Transverse threads 201, 203, 205 and 207 i. the course of the longitudinal thread 32 arranged adjacent to the longitudinal thread 31 is offset by a transverse thread.
  • the course of the longitudinal thread 33 arranged adjacent to the longitudinal thread 32 corresponds to the course of the longitudinal thread 32, and the course of the
  • longitudinal thread 34 corresponds to the course of the longitudinal thread 31st
  • the formed by the lower longitudinal threads 31, 32, 33 and 34 4-shaft binding is through the lower longitudinal threads 35, 36, 37 and 38th repeated.
  • the running side 4-shaft binding repeats after four lower transverse threads. In other words, in FIGS. 10 and 10a, four repeats of the running side four-shaft binding are shown. Each running cross weave repeat binds each lower cross thread twice.
  • an upper longitudinal thread is always arranged between two lower longitudinal threads in the plan view of the fabric.
  • the upper longitudinal thread 11 lies in the plan view substantially between the two lower longitudinal threads 31, 32 (see Figure 11)
  • the upper longitudinal thread 12 is substantially between the lower longitudinal threads 33, 34
  • the upper longitudinal thread 13 is substantially between the lower longitudinal threads 35, 36
  • the upper longitudinal thread 14 is substantially between the lower longitudinal threads 37, 38th
  • the diameter of the upper longitudinal threads 11-14 may be equal to the diameter of the threads 21-24 of the functional pairs. This can be a
  • the upper longitudinal threads 11-14 and the threads 21-24 of the functional pairs can be easily arranged on a common warp beam (e.g., warp beam X2 in Fig. 8).
  • the diameter of the lower longitudinal threads 31-38 may be e.g. like that
  • the fabric according to the second embodiment can be produced like the fabric according to the first embodiment with the loom or warp thread arrangement shown in FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Woven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)

Abstract

L'invention concerne une toile de formation de feuille se présentant sous la forme d'un tissu multicouche. Ce tissu présente un rapport de seize fils longitudinaux, parmi lesquels quatre fils longitudinaux (11- 14) constituent des fils longitudinaux supérieurs, huit fils longitudinaux (31-38) constituent des fils longitudinaux inférieurs, et les quatre fils longitudinaux (21-24) restants forment deux paires de fils longitudinaux fonctionnelles qui sont composées chacune de deux fils longitudinaux juxtaposés et complètent alternativement la première armure, au moins un des quatre fils longitudinaux qui composent les deux paires de fils longitudinaux fonctionnelles s'étendant aussi bien dans la couche supérieure que dans la couche inférieure du tissu et reliant ainsi la couche supérieure du tissu à la couche inférieure du tissu.
EP11725359.1A 2010-05-21 2011-05-17 Toile de formation de feuille Active EP2470716B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11725359T PL2470716T3 (pl) 2010-05-21 2011-05-17 Sito formera

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010017055A DE102010017055A1 (de) 2010-05-21 2010-05-21 Blattbildungssieb
PCT/EP2011/057978 WO2011144616A1 (fr) 2010-05-21 2011-05-17 Toile de formation de feuille

Publications (2)

Publication Number Publication Date
EP2470716A1 true EP2470716A1 (fr) 2012-07-04
EP2470716B1 EP2470716B1 (fr) 2014-05-14

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ID=44627049

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EP11725359.1A Active EP2470716B1 (fr) 2010-05-21 2011-05-17 Toile de formation de feuille

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US (1) US8631832B2 (fr)
EP (1) EP2470716B1 (fr)
JP (1) JP5607757B2 (fr)
KR (1) KR101425421B1 (fr)
CN (1) CN102741474B (fr)
BR (1) BR112012028079B1 (fr)
DE (1) DE102010017055A1 (fr)
ES (1) ES2485385T3 (fr)
PL (1) PL2470716T3 (fr)
RU (1) RU2527375C2 (fr)
WO (1) WO2011144616A1 (fr)

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DE102013218465A1 (de) * 2013-09-16 2015-03-19 Voith Patent Gmbh Formiersieb
JPWO2018047219A1 (ja) * 2016-09-06 2019-06-27 日本フイルコン株式会社 工業用二層織物
JPWO2018047217A1 (ja) * 2016-09-06 2019-06-24 日本フイルコン株式会社 工業用二層織物
DE102017010756A1 (de) * 2017-07-10 2019-01-10 Gkd - Gebr. Kufferath Ag Gewebe, Filterelement, Filter und Verwendung davon
IT202000000637A1 (it) * 2020-01-15 2021-07-15 Feltri Marone S P A Tessuto triplo di fabbricazione della carta
DE102022117304B3 (de) 2022-07-12 2023-10-12 Voith Patent Gmbh Gewebeband

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Also Published As

Publication number Publication date
RU2012126053A (ru) 2014-06-27
JP5607757B2 (ja) 2014-10-15
JP2013517388A (ja) 2013-05-16
RU2527375C2 (ru) 2014-08-27
US20130105030A1 (en) 2013-05-02
ES2485385T3 (es) 2014-08-13
EP2470716B1 (fr) 2014-05-14
CN102741474A (zh) 2012-10-17
BR112012028079A2 (pt) 2016-08-02
DE102010017055A1 (de) 2011-11-24
CN102741474B (zh) 2015-01-14
WO2011144616A1 (fr) 2011-11-24
PL2470716T3 (pl) 2014-10-31
KR20120139734A (ko) 2012-12-27
BR112012028079B1 (pt) 2020-02-11
US8631832B2 (en) 2014-01-21
KR101425421B1 (ko) 2014-07-31

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