EP2865792B1 - Banc d'étirage pour un dispositif de filage pneumatique - Google Patents

Banc d'étirage pour un dispositif de filage pneumatique Download PDF

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Publication number
EP2865792B1
EP2865792B1 EP14003172.5A EP14003172A EP2865792B1 EP 2865792 B1 EP2865792 B1 EP 2865792B1 EP 14003172 A EP14003172 A EP 14003172A EP 2865792 B1 EP2865792 B1 EP 2865792B1
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EP
European Patent Office
Prior art keywords
sliver
compressor
spinning
fibers
drafting
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.)
Active
Application number
EP14003172.5A
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German (de)
English (en)
Other versions
EP2865792A1 (fr
Inventor
Thomas Gerhard Gries
Ansgar Paschen
Eric Schulte Südhoff
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.)
Saurer Spinning Solutions GmbH and Co KG
Original Assignee
Saurer Germany GmbH and Co KG
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Publication date
Application filed by Saurer Germany GmbH and Co KG filed Critical Saurer Germany GmbH and Co KG
Publication of EP2865792A1 publication Critical patent/EP2865792A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides

Definitions

  • the invention relates to a drafting system for an air spinning device for warping and compacting a sliver, with a drafting upstream of the supercharger and the drafting subsequent air spinning device, wherein in the main drafting zone upstream drafting zone of the drafting a second compressor is arranged.
  • the yarn is solidified by true rotation of all the fibers about the longitudinal axis of the yarn.
  • the sliver is often compacted in the individual drafting fields to integrate protruding fibers or fiber ends at the edge of the sliver in the sliver and to ultimately obtain a smooth, closed and uniform yarn with high strength and parallel fibers. By compacting the sliver, a higher strength and a lower hairiness of the ring yarn are achieved.
  • the yarn-forming process largely depends on how well it is possible to wind binder fibers in sufficient numbers and as regularly as possible around the core fibers.
  • the emerging between the exit rollers of the drafting sliver passes through a nozzle block to the inlet opening of a hollow spinning spindle.
  • the free fiber ends are looped around the conically shaped spindle head of the spinning spindle by means of a circulating air flow and wrap themselves spirally around the screw during the drawing of the thread into the spindle mentioned core fibers.
  • the core fibers form together with the so-called Umwindefasern a new thread, which is subtracted, monitored by a yarn cleaner, optionally cleaned and wound up.
  • the warping of slivers in air spinning machines takes place at high overall distortions and high speeds.
  • the total distortion is, for example, in excess of 180.
  • air-spinning requires a drafting system for warping the sliver, which can handle a multiple of the fiber throughput of a conventional spinning process.
  • roller pairs In a drafting system usually several consecutive pairs of rollers are arranged. Each of these roller pairs consists of a lower roller and an upper pressure roller. The sliver is transported through the pairs of rollers to the air spinning unit. Since the peripheral speeds of the roller pairs increase in the direction of fiber travel, also creates the so-called default.
  • the drafting system designation shows how many pairs of rollers the drafting system consists of. So there are three-roll, four-roll or five-roll drafting. For example, in a four-roller drafting system, as seen in the direction of fiber travel, the first two pairs of rollers form the biasing field; the section thereafter the intermediate drafting field and the last two pairs of rollers the main drafting zone.
  • the drafting system arranged directly in front of the air-spinning unit is of particular importance.
  • the aim is to produce as uniform a sliver as possible in order to be able to spin a yarn that is as uniform as possible.
  • the DE 30 39 149 A1 discloses a high-distortion device in a spinning machine, with which stretching at high distortion ratio is feasible and in which a disturbance of the fiber assembly, such as the formation of flying fibers is prevented by air streams occurring and an abnormal expansion of the sliver width in the drafting zone.
  • the device has a clamping and pressing device which presses at the front end of the Riemchenstrecktechnikes running on both sides of the sliver stretch of the straps against each other and an offset terminal point at the front end of the Riemchenstreckwerks, so that the action of air currents in the Near the nip of the front rollers arise, is prevented.
  • the guided fibers produce deformations of the surface of the apron, which in turn means that insufficient pressure can be applied to the fibers of the sliver.
  • a disadvantage of the device is that the use of a compressor in the main draft zone compacts the fibers in the arresting point and reduces the proportion of edge fibers. Free fiber ends, which are actually needed after the delay at the entrance of the sliver in the spinning spindle for winding the core fibers are instead introduced into the compact sliver. In addition, the friction of the fibers on the wall of the third compressor adversely affects, which in turn impairs the yarn uniformity.
  • the present invention seeks to further develop a drafting system for an air-spinning device so that the proportion of Umwindemaschinen can be improved.
  • a third compressor is additionally arranged in a main drafting zone according to claim 1, the width of the passage cross-section greater, but not more than 10 mm larger than the width of the passage cross-section of the second compressor.
  • the fibers of the fiber sliver are compacted in the default drafting zone upstream default field and then fed to the main drafting zone.
  • the fibers are adequately guided by means of the third compressor, without the fiber sliver being further compressed, so that the edge fibers are still present when the sliver enters the spinning spindle and consequently can wind around the core fibers as binder fibers, so that the yarn In air spinning, the required strength is maintained and the substance utilization of the fibers is improved.
  • the third compressor is selected depending on the second compressor and the desired proportion of the binder fibers in the finished spun yarn.
  • the passage cross-section indicates the width of the passage of the compressor, the height of the passage is technologically less important.
  • the passage cross-section of the third compressor is chosen to be substantially larger than the passage cross-section of the second compressor, but at most 10 mm larger, the sliver can run somewhat wider due to the larger passage cross-section and the proportion of edge fibers increases.
  • the fiber output during spinning also increases slightly, but the spun yarn has a high proportion of binder fibers and has a high strength.
  • the passage cross-section of the third compressor is at least 1 mm larger than the passage cross-section of the second compressor.
  • FIG. 1 schematically shows a front view of an air-spinning machine 1.
  • These textile machines have a plurality of in series juxtaposed work or spinning stations 2, which are positioned between the end arranged so-called end racks 15, 16.
  • each of the jobs 2 with a template material for example, a stored in a sliver can 3 sliver 4, equipped.
  • each of the jobs 2 has a drafting 5, an air-spinning device 6, a thread take-off device 7, a yarn cleaner 8 and a take-up device.
  • the associated thread-changing device 9 ensures that the yarn 10 produced in the air-spinning unit 6 from the sliver 4 is wound in intersecting layers onto a package 11.
  • This package reel or cross-wound bobbin 11 is, as usual, held in a coil frame, not shown, and is driven by a coil drive, also not shown rotates.
  • the jobs 2 of the textile machine 1 are preferably supplied by an automatically operating control unit 12, which, guided on rails 13, 14, along the work stations 2 is movable.
  • FIG. 2 shows a four-roller drafting 5 with downstream shipsspinnaggregat 6 and the passage of the sliver 4th
  • the withdrawn from the sliver can 3 sliver 4 is fed by a pre-compressor 17, which is upstream of the drafting 5, arranged by the set of feed rollers pair of top and bottom rollers 18, 19 and by means of the top and bottom rollers 20, 21; 23, 24; 28, 29 stretched.
  • the upper and lower rollers 23, 24 cooperate with the straps 25, 26 together.
  • the upper and lower rollers 28, 29 are arranged as output rollers.
  • the first two pairs of rollers form the Vorverzugsfeld 30; the section thereafter, the intermediate drafting zone 31, in which the second compressor 22 is arranged, and the last two pairs of rollers, the main drafting zone 32 with a third compressor 27, whose passage cross section is greater than the passage cross section of the second compressor 22nd
  • the sliver 4 is through the pairs of rollers 18, 19; 20, 21; 23, 24; 28, 29 transported to the air spinning unit 6, wherein the peripheral speeds of the roller pairs increase in the direction of fiber travel.
  • the sliver is warped 3 to 6 times.
  • the sliver 4 is compacted by means of the second compressor 22 and further warped.
  • the sliver 4 is guided by means of the third compressor 27, but not further compacted and moreover warped to its final fineness, which corresponds to the yarn count.
  • a nozzle device 42 On the input side of the spinning unit 6, a nozzle device 42 is arranged.
  • the nozzles 43, 44 are connected via the line 45 to a compressed air source 46.
  • the air flowing out of the nozzles 43, 44 generates a rotational flow, with which the stretched sliver 4 is acted upon. This is followed by a hollow spinning cone 47 connects.
  • the yarn 10 formed in the interaction of the nozzle device 42 and spinning cone 47 is withdrawn from the spinning unit 6 through the hollow spinning cone 47.
  • the air chamber 48 surrounding the spinning cone 47 is connected to a vacuum source 50 by means of a further line 49. Further details of the spinning process by means of such spinning devices are for example the DE 199 26 492 A1 removable.
  • FIG. 3 shows a three-roller drafting system.
  • the sliver 4 passes through the pre-compressor 17 and enters the drafting system 5.
  • the feed roller pair 33 forms, with the middle roller pair 34, the pre-delay zone 36, in which the second compressor 22 is arranged.
  • the following main drafting zone 37 is formed by the two, viewed in the fiber direction, rear roller pairs, the belt acting with intermediate roller pair 34 and the output roller pair 35.
  • the third compressor 27 is arranged.
  • FIG. 4 is a five-roller drafting system shown. Since a drafting system has already been described in detail, only the differences to the already made statements will be discussed here.
  • the first bias field 56 is formed by the input roller pair 51 and the second roller pair 52. This is followed by a second pre-delay field 57, which is delimited by the second roller pair 52 and the third roller pair 53. Between the third roller pair 53 and the fourth roller pair 54 is the intermediate drafting zone 58 including the second compressor 22.
  • the last draft zone is followed by the main drafting zone 59, which is formed by the fourth roller pair 54 acting with aprons and the pair of output rollers 55. In this main drafting zone 59, the third compressor 27 is arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (2)

  1. Banc d'étirage (5) destiné à un dispositif de filage pneumatique (6), en vue de l'étirage et du compactage d'un ruban de fibres (4), comprenant un compresseur préalable (17) implanté en amont du banc d'étirage (5) et un dispositif de filage pneumatique (6) succédant audit banc d'étirage (5), un deuxième compresseur (22) étant installé dans la zone d'étirage dudit banc d'étirage (5) qui est située en amont de la zone d'étirage principal,
    caractérisé par le fait
    qu'un troisième compresseur (27) est additionnellement installé dans une zone d'étirage principal (32, 37, 59), la largeur de la section transversale de passage dudit compresseur étant supérieure, toutefois supérieure de 10 mm au maximum, à la largeur de la section transversale de passage du deuxième compresseur (22).
  2. Banc d'étirage (5) destiné à un dispositif de filage pneumatique (6), selon la revendication 1, caractérisé par le fait que la section transversale de passage du troisième compresseur (27) est supérieure, d'au moins 1 mm, à la section transversale de passage du deuxième compresseur (22).
EP14003172.5A 2013-10-23 2014-09-13 Banc d'étirage pour un dispositif de filage pneumatique Active EP2865792B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310017636 DE102013017636A1 (de) 2013-10-23 2013-10-23 Streckwerk für eine Luftspinnvorrichtung

Publications (2)

Publication Number Publication Date
EP2865792A1 EP2865792A1 (fr) 2015-04-29
EP2865792B1 true EP2865792B1 (fr) 2016-08-24

Family

ID=51584915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14003172.5A Active EP2865792B1 (fr) 2013-10-23 2014-09-13 Banc d'étirage pour un dispositif de filage pneumatique

Country Status (4)

Country Link
EP (1) EP2865792B1 (fr)
CN (1) CN104562317B (fr)
DE (1) DE102013017636A1 (fr)
IN (1) IN2014MU02965A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017122318A1 (de) * 2017-09-26 2019-03-28 Saurer Spinning Solutions Gmbh & Co. Kg Verdichtereinrichtung
DE102018006100A1 (de) 2018-08-03 2020-02-06 Saurer Spinning Solutions Gmbh & Co. Kg Streckwerkeinheit und Streckwerk für eine Spinnmaschine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727391A (en) * 1971-11-04 1973-04-17 Du Pont Apparatus for drafting and twisting fibers
US4387487A (en) * 1979-10-16 1983-06-14 Murata Kikai Kabushiki Kaisha High draft apparatus in spinning machine
JPH01118628A (ja) 1987-10-29 1989-05-11 Murata Mach Ltd 紡績糸の製造装置
DD282930A5 (de) * 1989-05-03 1990-09-26 Karl Marx Stadt Tech Hochschul Streckwerk fuer spinnereimaschinen
DE4032940A1 (de) * 1990-10-17 1992-04-23 Fritz Stahlecker Vorrichtung zum pneumatischen falschdrallspinnen
DE4132919A1 (de) 1991-10-04 1993-04-08 Univ Chemnitz Tech Vorrichtung zur beeinflussung von luftstroemungen an streckwerkswalzen von spinnereimaschinen
DE4323472C2 (de) * 1993-07-14 1997-08-07 Inst F Textil Und Verfahrenste Doppelriemchen-Streckwerk
DE19926492A1 (de) 1998-10-02 2000-04-06 Schlafhorst & Co W Spinnvorrichtung
JP2012107363A (ja) * 2010-11-18 2012-06-07 Murata Mach Ltd ドラフトローラ、ドラフト装置、及び紡績機
CN102704074B (zh) * 2012-06-26 2014-10-15 东华大学 一种长丝螺旋展开的下托式复合纺纱机构、方法与应用

Also Published As

Publication number Publication date
EP2865792A1 (fr) 2015-04-29
DE102013017636A1 (de) 2015-04-23
IN2014MU02965A (fr) 2015-10-09
CN104562317B (zh) 2017-04-26
CN104562317A (zh) 2015-04-29

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