EP3854917A1 - Unité de guidage de fil, métier à filer à rotor à bout libre et procédé de fonctionnement d'un poste de filage - Google Patents

Unité de guidage de fil, métier à filer à rotor à bout libre et procédé de fonctionnement d'un poste de filage Download PDF

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Publication number
EP3854917A1
EP3854917A1 EP21151969.9A EP21151969A EP3854917A1 EP 3854917 A1 EP3854917 A1 EP 3854917A1 EP 21151969 A EP21151969 A EP 21151969A EP 3854917 A1 EP3854917 A1 EP 3854917A1
Authority
EP
European Patent Office
Prior art keywords
thread guide
thread
unit
spinning
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21151969.9A
Other languages
German (de)
English (en)
Inventor
Markus Kübler
Matthias Lauer
Romeo Pohn
Constantin RIEGER
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP3854917A1 publication Critical patent/EP3854917A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/40—Removing running yarn from the yarn forming region, e.g. using tubes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning

Definitions

  • the present invention relates to a thread guide unit for a spinning station of an open-end rotor spinning machine, with a thread guide tube, a thread guide channel formed in the thread guide tube for guiding a thread along a thread course, and a compressed air nozzle for introducing a first air stream into the thread guide channel.
  • the invention also relates to an open-end rotor spinning machine with a plurality of spinning stations, each spinning station having a spinning unit and a thread guiding unit, and a method for operating a spinning station of an open-end rotor spinning machine, a spinning unit of the spinning station producing a thread, the thread being drawn off by a thread guiding unit and is wound onto a cheese and then, when the thread has to be attached, a thread end is moved to the thread guide unit, where the thread end is sucked into the thread guide unit by a first air stream, which is introduced into a thread guide channel of the thread guide unit in particular from a compressed air nozzle , and then by a second air stream that is drawn into the spinning unit by the negative pressure prevailing in the spinning unit.
  • Corresponding thread guide units for a spinning station of an open-end rotor spinning machine are known in various designs in the prior art.
  • the thread guide units serve to guide the thread when it is pulled out of a rotor and when the thread end is attached to repair a thread break.
  • the object of the present invention is therefore to create a thread guide unit, an open-end rotor spinning machine and a method for operating a spinning station which simplifies the attachment of the thread end and ensures an undisturbed air flow in the thread guide unit without the risk of air jams.
  • the object is achieved by a thread guide unit, an open-end rotor spinning machine and a method for operating a spinning station with the features of the independent claims.
  • a thread guide unit is proposed for a spinning station of an open-end rotor spinning machine, with a thread guide tube, a thread guide channel formed in the thread guide tube for guiding a thread along a thread course, and a compressed air nozzle for introducing a first air stream into the thread guide channel.
  • the thread coming from a spinning unit of the spinning station is drawn off through the thread guide channel along a thread course, the spinning unit having a rotor for producing the thread.
  • a thread end has to be repeated at intervals be applied, for example after a thread break or a cleaner cut.
  • a cleaner cut is the deliberate separation of the thread because it does not have the desired properties, such as thickness or purity.
  • the thread end is introduced back into the spinning unit through the thread guide channel of the thread guide tube.
  • the movement of the thread end along the course of the thread is supported by the first air stream introduced by the compressed air nozzle.
  • the thread is then sucked into the spinning unit by means of a second air stream, which is created by the negative pressure prevailing in the spinning unit.
  • the thread guide channel is interrupted on one side by an air outlet opening formed on the thread guide tube.
  • the air outlet opening is advantageously a recess in the thread guide tube.
  • the first air stream is deflected out of the thread guide channel at least partially on one side and in a targeted manner.
  • the thread is picked up by the second air stream and then sucked into the spinning unit along the course of the thread.
  • a build-up of air in the thread guide channel can be avoided.
  • a one-sided and targeted deflection of the first air flow and the subsequent gripping of the thread by the second air flow causes the thread to follow the course of the thread.
  • the thread guide channel has at least one thread guide contour that is formed continuously along the thread course for continuous guiding of the thread in the thread guide channel.
  • This can be a wall of the thread guide tube that is designed continuously along the thread course. In this way, the continuous guidance of the thread in the thread guide channel can be guaranteed. Furthermore, due to the continuous guidance, a deflection of the thread outside of the thread course due to environmental influences can be avoided.
  • the air outlet opening is at least partially tangential to the thread guide channel. This ensures a simplified deflection of the first and / or second air stream while at the same time guiding the thread constantly.
  • the thread guide tube has a change in direction, in particular in the form of a curvature.
  • the thread guide tube has a thread exit end and a fastening end. At the thread exit end, the thread emerges from the thread guide unit in an exit direction during the spinning operation and the thread guide unit is fastened to the spinning unit at the fastening end. The fastening end thus establishes the connection to the spinning unit.
  • the thread is fed in one feed direction to the rotor for attachment.
  • the change in direction is used in particular when the exit direction and the feed direction span a deflection angle. In this case, the change in direction of the thread guide tube is determined in such a way that this deflection angle is taken into account in the course of the thread. In this way, the thread course can be influenced and controlled.
  • the air outlet opening is arranged in the area of the change in direction, in particular in an extended area of the change in direction.
  • the stretched area of the change of direction is here the convex area of the change of direction.
  • the first air stream is introduced into the thread guide channel by the compressed air nozzle in the area of the thread exit end.
  • the thread guide tube has at least one twist stop means and / or an air guide element.
  • the twist stop means By means of the twist stop means, the twist generated by the rotor in the thread is stopped, so that the thread only receives a certain amount of twist and consequently has predetermined properties. The twist in the thread is thus only introduced from the rotor to the twist stop means.
  • the air guide element directs the first air flow introduced by the compressed air nozzle and / or the second air flow produced by the spinning unit in an even more targeted manner out of the air outlet opening formed on the thread guide tube.
  • the swirl stop means can also take over the functions of the air guiding element here.
  • the swirl stop means and / or the air guide element is arranged in the area of the change in direction, in particular in a compressed area of the change in direction.
  • the targeted and one-sided deflection of the first air flow by the change in direction is additionally supported by the swirl stop means and / or the air guiding element.
  • twist stop means and / or the air guide element is detachably connected to the thread guide tube, in particular by a form fit and / or force fit. As a result, the swirl stop means and / or the air guide element can be exchanged.
  • twist stop means and / or the air guide element is pushed into the thread guide tube in a push-in direction, in particular through the air outlet opening.
  • a simple exchange of the swirl stop means and / or the air guide element through the air outlet opening can thus be implemented.
  • the thread guide unit can be fastened quickly and easily to the spinning unit by the fastening means.
  • the thread guide unit can be supplied with compressed air through the compressed air connection.
  • the thread guide unit has a compressed air line which leads from the compressed air nozzle to the compressed air connection.
  • the compressed air present at the compressed air connection can thus be passed on to the compressed air nozzle, with which the first air stream is then introduced into the thread guide channel.
  • the thread guide tube has at least one thread sensor. In this way, possible thread breaks can be detected at an early stage. Furthermore, the position of the thread end can be determined by the thread sensor during the piecing process and the first air flow can thus be introduced into the thread guide channel as required. In this way it can be avoided that the compressed air nozzle is switched off too early or too late.
  • each spinning station having a spinning unit and a thread guide unit.
  • the thread comes out of the spinning unit and is drawn off via the thread guide unit.
  • the thread is then wound onto a cheese by the thread guide unit.
  • the thread guide unit is designed according to the preceding and / or following description, it being possible for the features mentioned to be present individually or in any combination.
  • a rotor rotating about an axis of rotation is arranged in the spinning unit and the thread guide unit has an air outlet opening formed on a thread guide tube, in particular in the area of a change in direction of the thread guide tube.
  • a thread guide channel of the thread guide tube and / or the air outlet opening is arranged in the direction of the axis of rotation of the rotor.
  • a spinning unit of the spinning station produces a thread.
  • the thread is drawn off by a thread guide unit and wound onto a cheese.
  • a thread end is moved to the thread guide unit.
  • the thread end is sucked into the thread guide unit by a first air stream which is introduced into a thread guide channel of the thread guide unit in particular from a compressed air nozzle.
  • the thread end is then sucked into the spinning unit by a second air stream that is created by the negative pressure prevailing in the spinning unit.
  • the first air flow is at least partially deflected on one side and in a targeted manner out of the thread guide channel of the thread guide unit.
  • the unilateral and targeted deflection of the first air flow can prevent air from being blocked in the thread guide channel.
  • the one-sided and targeted deflection of the first air flow and the subsequent gripping of the thread by the second air flow causes the thread to follow the course of the thread.
  • the thread guide unit is designed in accordance with the preceding and / or following description, it being possible for the features mentioned to be present individually or in any combination.
  • the thread end is guided by the first air stream until the thread guide tube changes direction. Then, when the thread end is detected by the second air flow, the first air flow is stopped. In this way, the thread end is guided to the spinning unit by the second air stream.
  • the first air flow is stopped in particular by switching off the compressed air nozzle. This ensures that the compressed air nozzle is switched off neither too early nor too late. By switching off the compressed air nozzle, unnecessary energy consumption can be avoided. Furthermore, by stopping the first air flow after the thread end has been detected by the second air flow, the following of the thread along the thread course can be additionally supported.
  • Figure 1a shows a schematic side view of a spinning station 1 of an open-end spinning machine in the spinning mode.
  • Fiber material is introduced into a rotor 2 of a spinning unit 3 of the spinning station 1 and spun into a thread 4.
  • the rotor 2 rotates here about an axis of rotation RA.
  • the thread 4 is guided out of the rotor 2 through a thread guide channel 5 of a thread guide unit 6 and drawn off by a pair of draw-off rollers 7.
  • the thread guide unit 6 has a fastening means 8 into which a retaining spring 9 of the spinning unit 3 engages and thus connects a thread guide tube 10 of the thread guide unit 6 to the spinning unit 3.
  • the thread 4 is wound onto a cross-wound bobbin 12 by a traversing unit 11.
  • the cross-wound bobbin 12 is held by a bobbin holder 13 and driven by a drive roller 14.
  • the course of the thread 4 in the spinning operation from the rotor 2 to the cheese 12 is referred to as the thread course 15.
  • the thread guide tube 10 has a change in direction in the form of a curvature.
  • the thread 4 emerges from the thread guide tube 10 in an exit direction to the pair of take-off rollers 7.
  • the thread 4 is fed to the rotor 2 of the spinning unit 3 in a feed direction which is essentially parallel to the axis of rotation RA of the rotor 2.
  • the exit direction and the feed direction span a deflection angle.
  • the change in direction of the thread guide tube 10 is determined in such a way that this deflection angle in the thread course 15 is taken into account.
  • a compressed air stream is blown through a compressed air nozzle 16 of the thread guide unit 6 at time intervals. Dirt and fluff are thereby loosened and at least in part sucked off by a vacuum device, not shown here, of the spinning unit 3. Another part of the dirt and fiber fly, in particular from the thread guide channel 5, can be guided out of the thread guide unit 6 through an air outlet opening 17 in the thread guide tube 10.
  • a suction nozzle 19 displaceable by a motor 18 and a thread catcher 20 are not required in the spinning operation.
  • FIG Figure 1b shows a schematic side view of a spinning station 1 of an open-end spinning machine similar to FIG Figure 1a , after a thread break or a cleaner cut.
  • a thread end 21 that has run onto the cheese 12 must first be found and then attached to the spinning unit 3.
  • the suction nozzle 19 is displaced by the motor 18 in such a way that the opening of the suction nozzle 19 is located just above the surface of the cheese 12.
  • the cheese 12 is then slowly rotated by the drive roller 14 against the direction of rotation during the spinning operation until the thread end 21 is sucked into the suction nozzle 19.
  • the thread 4 is then inserted by the thread catcher 20 into the traversing unit 11 and the pair of take-off rollers 7 and moved as far as the thread guide unit 6.
  • the thread end 21 is fed into the thread guide unit 6 by a first air stream 22, which is introduced into the thread guide channel 5 in particular by the compressed air nozzle 16 sucked in.
  • the thread end 21 is now located in the thread guide channel 5 of the thread guide unit 6, as in FIG Figure 1c shown.
  • the air jam would prevent the thread 4 from being guided smoothly along the thread course 15.
  • the first air flow 22 can be stopped when the thread end 21 has been caught by the second air flow 23. In this way, on the one hand, a possible accumulation of air can be reduced and / or prevented and, on the other hand, energy for operating the compressed air nozzle 16 can be saved.
  • the thread guide channel 5 extends, as in FIG Figure 1b shown, at least partially in the direction of the axis of rotation RA of the rotor 2.
  • the air outlet opening 17 is also arranged in the direction of the axis of rotation RA.
  • the axis of rotation RA is shown in FIG Figure 1c not shown.
  • the air outlet opening 17 adjoins the thread guide channel 5 at least in part tangentially.
  • the thread end 21 is captured by the second air stream 23 and moved further along the thread course 15 into the thread guide unit 6 until the thread end 21 has arrived in the spinning unit 3.
  • this movement can be supported by the pair of take-off rollers 7, which rotate backwards.
  • the thread end 21 is then cut off and prepared in the spinning unit 3.
  • Figure 2 shows a longitudinal section of a thread guide unit 6 according to an embodiment.
  • the thread guide unit 6 has the thread guide tube 10 with the thread guide channel 5 and a thread exit element 24.
  • the thread exit element 24 enables a gentle exit of the thread 4 from the thread guide unit 6.
  • the thread exit element 24 is arranged on the thread guide tube 10 in such a way that an opening 25 is formed between the thread exit element 24 and the thread guide channel 5.
  • the compressed air introduced transversely into the thread guide channel 5 by the compressed air nozzle 16 is deflected in the direction of the thread course 15 through the opening 25 and the first air flow 22 is thereby formed.
  • This first air flow 22 is similar to that in the preceding Figures 1a - 1c at least partially steered out of the air outlet opening 17.
  • the air outlet opening 17 is here as Recess formed in the extended area of the change in direction of the thread guide tube 10.
  • the air outlet opening 17 adjoins the thread guide channel 5 at least partially tangentially.
  • the deflection of the first air flow 22 takes place automatically when the air jam occurs in the thread guide channel 5.
  • a twist stop means 26 is arranged in the compressed area of the change in direction of the thread guide tube 10. As a result, the twist generated and / or introduced by the rotation of the rotor 2 in the thread 4 is stopped or reduced, which results in a defined twist in the thread 4 and thus constant thread properties. The twist in the thread 4 is thus only introduced from the rotor 2 to the twist stop means 26.
  • the twist stop means 26 In order to be able to easily exchange the twist stop means 26, it is detachably connected to the thread guide tube 10.
  • the twist stop means 26 can be pushed in and out of the thread guide tube 10 for changing via an insertion direction 27. In the exemplary embodiment shown, this push-in direction 27 runs through the air outlet opening 17.
  • the air outlet opening 17 serves both to deflect the first air flow 22 and to push the twist stop means 26 in and out.
  • the thread guide unit 6 additionally has at least one thread sensor 28.
  • the thread sensor 28 registers that a thread 4 is located in the thread guide channel 5.
  • the thread 4 is registered and thus the compressed air nozzle 16 can be regulated as required. This serves to prevent the compressed air nozzle 16 from being switched off too early or too late.
  • the thread sensor 28, as shown here is arranged in the area of the second air flow 23, it can be registered when the thread end 21 is detected by the second air flow 23 during the piecing process. The compressed air nozzle 16 can then be switched off, since the thread then enters the spinning unit 3 through the second air stream 23 is sucked in.
  • the thread guide unit 6 has at least one fastening means 8, for fastening in particular to the spinning unit 3, as in FIG Figures 1a - 1c shown.
  • FIG 3 a longitudinal section of a thread guide unit 6 according to an alternative embodiment is shown.
  • the thread guide tube 10 has an air guide element 29.
  • the air guide element 29 is arranged in the compressed area of the change in direction of the thread guide tube 10.
  • the air guide element 29 like the swirl stop means 26 in Figure 2 be releasably connected to the thread guide tube 10.
  • the air guide element 29 also takes on the tasks of the swirl stop means 26.
  • Figure 4 shows a longitudinal section of a thread guide unit 6 according to a further embodiment.
  • the fastening means 8 has a compressed air connection 30 in the exemplary embodiment shown here.
  • the compressed air connection 30 provides the compressed air for the compressed air nozzle 16.
  • the compressed air nozzle 16 is connected to the compressed air connection 30 via a compressed air line 31.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP21151969.9A 2020-01-27 2021-01-18 Unité de guidage de fil, métier à filer à rotor à bout libre et procédé de fonctionnement d'un poste de filage Withdrawn EP3854917A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020101840.1A DE102020101840A1 (de) 2020-01-27 2020-01-27 Fadenführungseinheit, Offenend-Rotorspinnmaschine und Verfahren zum Betreiben einer Spinnstelle

Publications (1)

Publication Number Publication Date
EP3854917A1 true EP3854917A1 (fr) 2021-07-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21151969.9A Withdrawn EP3854917A1 (fr) 2020-01-27 2021-01-18 Unité de guidage de fil, métier à filer à rotor à bout libre et procédé de fonctionnement d'un poste de filage

Country Status (3)

Country Link
EP (1) EP3854917A1 (fr)
CN (1) CN113174665A (fr)
DE (1) DE102020101840A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534816A1 (de) * 1975-08-05 1977-02-17 Zinser Textilmaschinen Gmbh Oe-spinnvorrichtung mit ejektorduese
EP0296412A1 (fr) * 1987-06-25 1988-12-28 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Tube de sortie de fil pour enlever un fil d'un dispositif à filer à bout libre
DE19624537A1 (de) * 1996-06-20 1998-01-02 Schlafhorst & Co W Verfahren und Vorrichtung zum Anspinnen eines Fadenendes in einer Offenend-Spinnvorrichtung
DE10201533A1 (de) * 2001-08-09 2003-02-20 Schlafhorst & Co W Offenend-Rotorspinnmaschine
DE102017116893A1 (de) 2016-07-28 2018-02-01 Rieter Ingolstadt Gmbh Fadenführungseinheit, Offenend-Spinnmaschine und Verfahren zum Betreiben einer Spinnstelle

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH672800A5 (fr) * 1986-03-19 1989-12-29 Schlafhorst & Co W
DE3723504A1 (de) * 1987-07-16 1989-01-26 Schlafhorst & Co W Drallstauelement fuer eine offenend-rotorspinnvorrichtung
DE3811739A1 (de) * 1988-04-08 1989-10-19 Schlafhorst & Co W Verfahren und vorrichtung zum verbessern eines in dem rotor einer offenend-spinnvorrichtung erzeugten garns
DE4039755A1 (de) * 1990-12-13 1992-06-17 Schlafhorst & Co W Garnabzugseinrichtung einer oe-rotorspinnvorrichtung
JP3355704B2 (ja) * 1992-08-27 2002-12-09 株式会社豊田自動織機 ロータ式オープンエンド精紡機及びその糸継ぎ方法
JP3132343B2 (ja) * 1995-07-11 2001-02-05 株式会社豊田自動織機製作所 ロータ式オープンエンド精紡機の糸継ぎ方法及び装置
DE10217243B4 (de) * 2002-04-15 2012-05-03 Rieter Ingolstadt Gmbh Verfahren zum Anspinnen eines Fadens an einer Offenend-Spinnvorrichtung
DE102004053507A1 (de) * 2004-11-02 2006-05-04 Wilhelm Stahlecker Gmbh Offenend-Rotorspinnvorrichtung
CZ303613B6 (cs) * 2011-11-28 2013-01-09 Rieter Cz S.R.O. Zpusob prípravy konce príze pro zaprádání na rotorových doprádacích strojích a sprádací rotor
DE102014008748A1 (de) * 2014-06-12 2015-12-17 Saurer Germany Gmbh & Co. Kg Offenend-Spinnvorrichtung
CN107338522A (zh) * 2016-08-26 2017-11-10 桐乡守敬应用技术研究院有限公司 一种转杯纺纱纱线引导装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534816A1 (de) * 1975-08-05 1977-02-17 Zinser Textilmaschinen Gmbh Oe-spinnvorrichtung mit ejektorduese
EP0296412A1 (fr) * 1987-06-25 1988-12-28 Schubert & Salzer Maschinenfabrik Aktiengesellschaft Tube de sortie de fil pour enlever un fil d'un dispositif à filer à bout libre
DE19624537A1 (de) * 1996-06-20 1998-01-02 Schlafhorst & Co W Verfahren und Vorrichtung zum Anspinnen eines Fadenendes in einer Offenend-Spinnvorrichtung
DE10201533A1 (de) * 2001-08-09 2003-02-20 Schlafhorst & Co W Offenend-Rotorspinnmaschine
DE102017116893A1 (de) 2016-07-28 2018-02-01 Rieter Ingolstadt Gmbh Fadenführungseinheit, Offenend-Spinnmaschine und Verfahren zum Betreiben einer Spinnstelle

Also Published As

Publication number Publication date
DE102020101840A1 (de) 2021-07-29
CN113174665A (zh) 2021-07-27

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