EP4306710A2 - Ruban tissé - Google Patents

Ruban tissé Download PDF

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Publication number
EP4306710A2
EP4306710A2 EP23179716.8A EP23179716A EP4306710A2 EP 4306710 A2 EP4306710 A2 EP 4306710A2 EP 23179716 A EP23179716 A EP 23179716A EP 4306710 A2 EP4306710 A2 EP 4306710A2
Authority
EP
European Patent Office
Prior art keywords
threads
binding
thread
longitudinal
longitudinal threads
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.)
Pending
Application number
EP23179716.8A
Other languages
German (de)
English (en)
Other versions
EP4306710A3 (fr
Inventor
Johann BÖCK
Jan Galik
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 EP4306710A2 publication Critical patent/EP4306710A2/fr
Publication of EP4306710A3 publication Critical patent/EP4306710A3/fr
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D11/00—Double or multi-ply fabrics not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D03D1/0094—Belts
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
    • D03D13/004—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft with weave pattern being non-standard or providing special effects
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D3/00—Woven fabrics characterised by their shape
    • D03D3/005—Tapes or ribbons 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
    • 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
    • D21F1/10—Wire-cloths
    • D21F1/105—Multi-layer wire-cloths
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/04—Filters

Definitions

  • the invention relates to a fabric tape, in particular forming fabric, for a machine for producing and/or processing a fibrous web, comprising an upper fabric layer with upper longitudinal threads and upper transverse threads interwoven with them, and a lower fabric layer with lower longitudinal threads and lower transverse threads interwoven with them, wherein the two fabric layers are arranged one above the other in such a way that when the fabric tape is used as intended, the upper fabric layer faces the fibrous web and the lower fabric layer faces away from the fibrous web, the upper fabric layer being connected to the lower fabric layer by binding threads running in the transverse direction of the fabric tape, whereby the weaving pattern of the fabric tape is repeated in repeats, the repeat being formed from a plurality of upper longitudinal thread groups with respect to the upper longitudinal threads and the lower longitudinal threads, each upper longitudinal thread group consisting of two first groups and a second group, each first group being formed from an upper longitudinal thread and one lower longitudinal thread arranged below this and every second group is formed from an upper longitudinal thread and two lower longitudinal threads arranged below this.
  • Such a fabric tape is already published DE 10 2013 218 465 A1 known. With satisfactory fiber support from the upper fabric layer and at the same time satisfactory dimensional stability from the lower fabric layer, it is particularly characterized by the fact that through the use of the first groups and the second groups in the repeat, the upper longitudinal threads are better supported by the lower longitudinal threads This was the case with previously known fabric tapes, which also had more lower longitudinal threads than upper longitudinal threads. The better support of the upper longitudinal threads results in the formation of fewer "dips" in the upper fabric layer, which reduces the tendency for unwanted, visible hydraulic marking in the fibrous web.
  • each binding thread in the repeat forms a multiple tie with the upper transverse threads in the repeat at least once, the repeat with respect to the upper longitudinal threads and the lower longitudinal threads consists of at least six longitudinal thread upper groups.
  • multiple binding means that a binding thread changing from the lower fabric layer to the upper fabric layer is at least over a first upper longitudinal thread, under a second upper longitudinal thread, which is immediately adjacent to the first upper longitudinal thread, and over a third upper longitudinal thread , which is immediately adjacent to the second upper longitudinal thread, is guided before it changes again from the upper fabric layer to the lower fabric layer.
  • the binding thread in question which changes from the lower fabric layer to the upper fabric layer, is guided over at least two upper longitudinal threads that are not directly adjacent to one another before changing back to the lower fabric layer.
  • the inventors have recognized that it is detrimental to the planarity of the upper fabric layer if only single ties are present in the repeat, ie that every binding thread that changes from the lower fabric layer to the upper fabric layer is always only guided over an upper longitudinal thread before it changes back to the lower fabric layer. This leads to the upper longitudinal thread, over which the binding thread is guided, being pulled downwards relatively strongly, and thus an undesirable "dip" is formed in the upper fabric layer at this point. With multiple binding, the effect of sink formation is reduced compared to single binding.
  • the repeat consists of at least six longitudinal thread upper groups, which in turn consist of a second and two first groups, as is the case here.
  • the at least six upper longitudinal thread groups each of which has 3 upper longitudinal threads and 4 lower longitudinal threads, make it possible, even if each binding thread in the repeat forms a multiple tie with the upper transverse threads in the repeat at least once according to the invention, to form the binding threads in such a fabric as pairs of binding threads use which, together with the upper longitudinal threads and the upper transverse threads, continue a plain weave of the upper fabric layer.
  • Such a plain weave of the upper fabric layer can provide particularly good fiber support, which also has an advantageous effect on the marking tendency of the fabric tape.
  • such fabric tapes have the disadvantage in practice that they are relatively thick. This is probably due to the fact that a 16-shaft binding is usually used for the 16 lower longitudinal threads, which then leads to a relatively long floating of the lower transverse threads, namely usually to a floating under at least 12 lower longitudinal threads.
  • the longer the flotation, the thicker the fabric belt and the thicker the fabric belt the larger the free volume of the sieve and thus the unwanted drag water, the required drive power, etc.
  • the repeat with regard to the upper longitudinal threads and the lower longitudinal threads consists of exactly six upper groups of longitudinal threads.
  • the repeat comprises 18 upper longitudinal threads and 24 lower longitudinal threads, for a total of 42 longitudinal threads. Since such fabric tapes, especially forming fabrics, are usually woven flat, the longitudinal threads correspond to the warp threads, whereas the transverse threads correspond to the weft threads in the weaving process. A repeat with 42 warp threads offers great design freedom.
  • the 24 lower longitudinal threads would also enable a 24-shaft weave, but this is not preferable, as this usually leads to very long flotations of the lower transverse threads under at least 12 lower longitudinal threads, and thus to an undesirable thickness of the fabric tape.
  • the upper fabric layer is connected to the lower fabric layer in the repeat exclusively by multiple ties of the binding threads with the upper longitudinal threads.
  • the upper fabric layer becomes particularly flat if one binding thread of a pair of binding threads forms a quadruple binding and the other binding thread of the pair of binding threads forms a five-fold binding with the upper transverse threads.
  • the undesirable effect can occur that, due to the resulting small number of connection points between the upper fabric layer and the lower fabric layer, these fabric layers are not sufficiently firmly connected to one another, which, among other things, can lead to increased internal abrasion of the binding threads at the connection points. In extreme cases, the two layers of fabric can separate from each other.
  • the repeat with regard to the upper longitudinal threads and the lower longitudinal threads consists of exactly six upper groups of longitudinal threads and the binding threads as a pair of binding threads continue a plain weave of the upper fabric layer, that in the repeat a first binding thread of a pair of binding threads forms two double ties with the upper longitudinal threads, whereas a second binding thread of the pair of binding threads forms a double binding and a triple binding with the upper longitudinal threads.
  • both an acceptable planarity of the upper fabric layer and a generally completely sufficient stability of the connection of the upper fabric layer to the lower fabric layer are obtained.
  • the binding threads are always arranged in pairs as pairs of binding threads, with preferably the two binding threads of the respective pair of binding threads being interwoven with the upper and lower longitudinal threads in a mutually interchangeable manner and when changing from interweaving with upper longitudinal threads to interweaving with lower ones Cross longitudinal threads and vice versa to form crossing points.
  • the two binding threads of a pair of binding threads preferably correspond to an upper transverse thread.
  • the upper and lower longitudinal threads in each group are not arranged or are only so slightly offset from one another that there is a maximum free space of half a diameter between them an upper longitudinal thread is formed, but preferably there is no free space.
  • the upper longitudinal threads can be sufficiently well supported by the upper longitudinal threads.
  • the diameter of the lower longitudinal threads is larger than the diameter of the upper longitudinal threads.
  • the diameter of the lower longitudinal threads can be in the range from 0.13 mm to 0.35 mm, with the upper longitudinal threads in particular having a diameter of 50% to 90%, preferably 60% to 80%, of the diameter of the lower longitudinal threads.
  • a fabric tape can be created with a particularly fine upper fabric layer, but whose lower fabric layer is sufficiently stable to provide a high wear volume and/or high dimensional stability.
  • the fabric tape In order to achieve a sufficiently dense upper fabric layer, even if the fabric tape has fewer upper longitudinal threads than lower longitudinal threads, it is advantageous if the fabric tape also has a relatively large number of upper transverse threads, in particular more upper transverse threads than lower transverse threads, particularly preferably 1.5 times or twice as many upper transverse threads as lower transverse threads.
  • pairs of binding threads that together complete the weaving pattern of the upper fabric layer with the upper transverse threads and the upper longitudinal threads, in particular to complete a plain weave, should also be counted among the upper transverse threads. In this case, a pair of binding threads would correspond in quantity to an upper longitudinal thread.
  • Figure 1 shows schematically, as a section of a fabric tape according to the invention, an upper longitudinal thread group WE, which can also be referred to as a repeating unit WE, consisting of three upper longitudinal threads O1 - O3 and four lower longitudinal threads U1 - U4. These longitudinal threads are arranged in three groups, namely two first groups I, which are each formed from an upper longitudinal thread O2, O3 and a lower longitudinal thread U3, U4 arranged below this, and a second group II, which consists of an upper longitudinal thread O1 and two Lower longitudinal threads U1, U2 arranged below this are formed.
  • first groups I which are each formed from an upper longitudinal thread O2, O3 and a lower longitudinal thread U3, U4 arranged below this
  • a second group II which consists of an upper longitudinal thread O1 and two Lower longitudinal threads U1, U2 arranged below this are formed.
  • the upper fabric layer includes the upper longitudinal threads O1 - O3 and interwoven with them Figure 1 upper transverse threads, not shown, and when the fabric tape is used as intended, serves to transport and/or drain the fibrous web.
  • the fabric band has a weaving pattern that is repeated in repeats R.
  • the repeat R is formed from at least six of these upper longitudinal thread groups WE with respect to the upper longitudinal threads and the lower longitudinal threads of the fabric tape.
  • it can be formed from exactly six of these longitudinal thread upper groups WE, as in Figure 2 shown schematically.
  • each binding thread B1, B2 in the repeat forms a multiple tie with the upper longitudinal threads in the repeat R at least once and at the same time the binding threads B1, B2 continue a plain weave of the upper fabric layer in pairs without making the fabric tape too thick.
  • Corresponding exemplary embodiments for the course of the binding threads B1, B2 are shown schematically in the Figures 3-5 shown.
  • Figure 3 shows a first embodiment of the present invention with regard to the twine threads B1, B2.
  • an upper transverse thread OQF from the repeat R is shown, which is alternately guided under and over adjacent upper longitudinal threads in order to form a plain weave in the upper fabric layer.
  • the course of a first binding thread B1 and a second binding thread B2 is shown in sections, namely if it is part of the upper fabric layer.
  • the two binding threads B1, B2 form a pair of binding threads immediately adjacent to the upper transverse thread OQF, which also contributes to the plain weave of the upper fabric layer by tying off every second upper longitudinal thread from one of the two binding threads B1, B2, ie the binding thread B1, B2 in question overflows the upper longitudinal thread, whereas this does not apply to the other upper longitudinal threads in between.
  • the first binding thread B1 forms a quadruple binding with the upper longitudinal threads of the repeat R, ie the first binding thread B1, which changes from the bottom from the bottom of the lower fabric layer into the upper fabric layer, is guided over a total of four upper longitudinal threads before it goes back down to the right the lower layer of fabric changes.
  • the second binding thread B2 shown in dash-dotted lines, forms a five-fold binding with the upper longitudinal threads of the repeat R, ie the second binding thread B2, which changes from the bottom from the bottom of the lower fabric layer into the upper fabric layer, is guided over a total of five upper longitudinal threads before it returns to the right changes downwards to the lower fabric layer.
  • This embodiment is particularly characterized by the fact that upper longitudinal threads are hardly pulled downwards by the binding threads B1, B2 and therefore very good planarity of the upper fabric layer can be achieved.
  • this embodiment is not necessarily optimal when it comes to the strength with which the upper fabric layer is connected to the lower fabric layer by the binding threads B1, B2. This is because in this exemplary embodiment there are only very few changes of the binding threads B1, B2 from the upper fabric layer to the lower fabric layer in the repeat R.
  • the binding threads B1, B2 change from the upper fabric layer to the lower fabric layer more often in a repeat pattern.
  • An example with a relatively large number of such changes is in the second exemplary embodiment Figure 4 shown.
  • the following will only focus on the differences from the first embodiment Figure 3 discussed and otherwise referred to the description of the first embodiment. The same applies mutatis mutandis to the other embodiments.
  • the first binding thread B1 and the second binding thread B2 change not only once from the lower fabric layer to the upper fabric layer, but three times each. The connection between these two tissue layers is correspondingly stronger. However, the number of ties is decreasing.
  • the first binding thread B1 forms a single binding with the second upper longitudinal thread - counted from the left, a first double binding with the sixth and eighth upper longitudinal threads and a second double binding with the twelfth and fourteenth upper longitudinal threads
  • the second Binding thread B2 forms a first single tie with the fourth upper longitudinal thread, a second single tie with the tenth upper longitudinal thread and a double tie with the sixteenth and eighteenth upper longitudinal thread.
  • the upper longitudinal threads of the single binding i.e. the second, fourth and tenth upper longitudinal threads, are pulled downwards relatively strongly by the binding threads B1, B2, since they change from the lower fabric layer to the upper fabric layer directly beforehand and immediately afterwards again to the lower one Change fabric layer. This is not optimal in terms of the planarity of the upper fabric layer.
  • a good middle ground between sufficient strength of the connection of the upper fabric layer to the lower fabric layer on the one hand and the avoidance of depressions in the upper fabric layer through single ties on the other hand is in the exemplary embodiment Figure 5 shown.
  • the two binding threads B1, B2 change from the lower fabric layer to the upper fabric layer twice per repeat R. Single binding is completely avoided. So In the repeat R, the first binding thread B1 forms a first double binding with the second and fourth upper longitudinal threads and a second double binding with the tenth and twelfth upper longitudinal threads, whereas the second binding thread B2 forms a double binding with the sixth and eighth upper longitudinal threads and a triple binding with the fourteenth , sixteenth and eighteenth upper longitudinal threads.
  • the third embodiment shown is shown schematically in the Figures 6-8 shown.
  • the three variants differed from each other in terms of the shankiness of the lower longitudinal threads.
  • the lower fabric layer has a 6-shaft repeat weave with regard to the lower longitudinal threads. This means that the weaving pattern of the lower fabric layer, which is defined by the lower longitudinal threads and the lower transverse threads, is always repeated after six lower longitudinal threads based on a respective lower transverse thread UQF.
  • the lower transverse thread UQF runs over the first, seventh, thirteenth and nineteenth lower longitudinal threads in repeat R and otherwise floats under the remaining lower longitudinal threads.
  • the lower fabric layer has an 8-shaft repeat weave with regard to the lower longitudinal threads.
  • the lower transverse thread UQF runs over the first, ninth and seventeenth lower longitudinal threads in repeat R and otherwise floats under the remaining lower longitudinal threads.
  • These flotations of the lower transverse thread UQF provide a wear volume for the machine side of the fabric tape facing away from the fibrous web when the machine is used as intended Fabric bands ready.
  • the floats are longer overall, so that more wear volume can be provided.
  • the lower fabric layer has a 12-shaft repeat weave with regard to the lower longitudinal threads. This means that the weaving pattern of the lower fabric layer, which is defined by the lower longitudinal threads and the lower transverse threads, is always repeated after twelve lower longitudinal threads based on a respective lower transverse thread UQF.
  • the lower transverse thread UQF runs over the first and second, as well as over the thirteenth and fourteenth lower longitudinal threads in repeat R and otherwise floats under the remaining lower longitudinal threads.
  • These flotations of the lower transverse thread UQF provide a wear volume for the machine side of the fabric tape facing away from the fibrous web when the fabric tape is used as intended.
  • the floats are longer overall, so that more wear volume can be provided.
  • Figure 9 shows schematically the complete weaving pattern of a repeat of the in Figure 7 shown second variant with the 8-shaft repeat weave with regard to the lower longitudinal threads.
  • the eight pairs of one upper transverse thread and one lower transverse thread can be seen alternating one above the other, as well as the eight pairs of two binding threads, one of which is always shown in dashed lines, and how these run above and below the upper and lower longitudinal threads. Since each pair of two binding threads completes the weaving pattern of the upper fabric layer, together with the upper transverse threads and the lower longitudinal threads, to form a plain weave, the respective pair of binding threads can be counted as an upper transverse thread. Such a counting method results in the fabric tape having twice as many upper transverse threads as lower transverse threads.
  • Figure 10 shows schematically the complete weaving pattern of a repeat of the in Figure 8 shown third variant with the 12-shaft repeat weave with regard to the lower longitudinal threads.
  • the twelve pairs of one upper transverse thread and one lower transverse thread, as well as the twelve pairs of two binding threads, one of which is always shown in dashed lines, can be seen alternating one above the other, and how these run above and below the upper and lower longitudinal threads.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Paper (AREA)
EP23179716.8A 2022-07-12 2023-06-16 Ruban tissé Pending EP4306710A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022117304.6A DE102022117304B3 (de) 2022-07-12 2022-07-12 Gewebeband

Publications (2)

Publication Number Publication Date
EP4306710A2 true EP4306710A2 (fr) 2024-01-17
EP4306710A3 EP4306710A3 (fr) 2024-10-16

Family

ID=86862061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23179716.8A Pending EP4306710A3 (fr) 2022-07-12 2023-06-16 Ruban tissé

Country Status (4)

Country Link
US (1) US20240018700A1 (fr)
EP (1) EP4306710A3 (fr)
CN (1) CN117385664A (fr)
DE (1) DE102022117304B3 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013218465A1 (de) 2013-09-16 2015-03-19 Voith Patent Gmbh Formiersieb

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010017055A1 (de) 2010-05-21 2011-11-24 Andritz Technology And Asset Management Gmbh Blattbildungssieb
DE102012207044A1 (de) 2012-04-27 2013-10-31 Voith Patent Gmbh Formiersieb

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013218465A1 (de) 2013-09-16 2015-03-19 Voith Patent Gmbh Formiersieb

Also Published As

Publication number Publication date
CN117385664A (zh) 2024-01-12
US20240018700A1 (en) 2024-01-18
EP4306710A3 (fr) 2024-10-16
DE102022117304B3 (de) 2023-10-12

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