EP4389948B1 - Préparation de ruban de fibres - Google Patents

Préparation de ruban de fibres

Info

Publication number
EP4389948B1
EP4389948B1 EP23217638.8A EP23217638A EP4389948B1 EP 4389948 B1 EP4389948 B1 EP 4389948B1 EP 23217638 A EP23217638 A EP 23217638A EP 4389948 B1 EP4389948 B1 EP 4389948B1
Authority
EP
European Patent Office
Prior art keywords
roller pair
spinning
drafting system
combing
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.)
Active
Application number
EP23217638.8A
Other languages
German (de)
English (en)
Other versions
EP4389948A1 (fr
Inventor
Heinz-Josef Peuker
Chandrassekaran Seshayer
Dirk Schiffers
Sarah MEISSNER
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 Intelligent Technology AG
Original Assignee
Saurer Intelligent Technology 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 Saurer Intelligent Technology AG filed Critical Saurer Intelligent Technology AG
Publication of EP4389948A1 publication Critical patent/EP4389948A1/fr
Application granted granted Critical
Publication of EP4389948B1 publication Critical patent/EP4389948B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • 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
    • 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
    • D01H5/74—Rollers or roller bearings
    • 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
    • D01H4/02—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 imparting twist by a fluid, e.g. air vortex
    • 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
    • D01H5/32—Regulating or varying draft
    • 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
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing

Definitions

  • the invention relates to a drafting unit for conveying a fiber strip towards an inlet opening of a vortex chamber of an air spinning device and to a method for operating a drafting unit comprising an output roller pair and at least one further drafting roller pair and/or belt roller pair, by means of which a fiber strip for the production of a thread is fed to a vortex chamber of the air spinning device at a spinning station of an air spinning machine, wherein the output roller pair can be driven decoupled from the at least one further drafting roller and/or belt roller pair.
  • Drafting devices of the type and methods for operating them at a spinning station of an air spinning machine are known in various forms from the prior art, as the printed publication EP 1 219 737 A1 , known.
  • the drafting devices serve to feed a fiber ribbon to a vortex chamber of an air spinning device at the spinning station, whereby this ribbon is first drafted.
  • a yarn preparation device located in the vortex chamber, serves this purpose.
  • the end of the thread is located downstream of the thread path and serves to cut the thread end to a predefined length and to unravel the thread end, i.e., to free it from its existing twist so that it can be joined to the fed fiber tape. After the thread end is unraveled, it is transported into the vortex chamber, for example by means of blown air, by releasing a clamp that positions the thread end in the thread preparation device, and held there.
  • the fiber strip is fed into the vortex chamber via the drawing unit and the output roller pair, forming a thread which is connected to the free thread end placed in the vortex chamber and then drawn off from the vortex chamber via the take-off device.
  • the drafting unit is first raised, which conveys the fiber sliver towards the vortex chamber. Only after the drafting unit has started raising is the take-up unit started, resulting in a dwell time of the yarn end in the vortex chamber at the beginning of the spinning process. During this time, the fiber sliver fed via the drafting unit is bonded to the yarn end in the vortex chamber. After this dwell time has elapsed, both the take-up unit and the output roller pair are accelerated to a predetermined take-up speed, at which the spinning process then continues.
  • the invention aims to provide a method for operating a drawing unit comprising a pair of output rollers and at least one further pair of drawing unit rollers and/or belt rollers, as well as a drawing unit which enables reliable preparation of the fiber strip end before the spinning process.
  • the invention solves the problem by means of a method with the features of claim 1 and by means of a drawing device with the features of claim 3.
  • Advantageous further developments of the Methods are specified in dependent claim 2.
  • Further embodiments of the drawing device according to the invention are found in dependent claims 4 and 5.
  • a characteristic feature of the method according to the invention is that the output roller pair for combing out the fiber strip after a spinning interruption is driven at a predetermined combing speed, and the at least one drafting roller and/or belt roller pair upstream of the output roller pair in the fiber strip direction is stopped or operated at a holding speed corresponding to the combing speed, which is max. 10% of the combing speed.
  • the output roller pair of the drafting unit and the take-up device have a matching production speed, referred to as the take-up speed, whereby the at least one drafting unit roller and/or belt roller pair upstream of the output roller pair, viewed in the yarn direction, has a lower production speed due to system requirements in order to achieve the desired distortion of the fiber strip within the drafting unit.
  • the output roller pair which can be driven independently of at least one further drafting roller and/or belt roller pair, is driven at a predetermined combing speed, while the at least one further upstream drafting roller and/or belt roller pair remains stationary or is operated at a low holding speed, which is a maximum of 10% of the combing speed.
  • a combing operation of the drafting unit results in no or only a very small feed of the fiber sliver towards the vortex chamber of the air spinning device.
  • the fiber sliver end is conditioned by this combing process so that it can be optimally prepared for the spinning process onto the free yarn end arranged in the vortex chamber.
  • the output roller pair is positioned before the at least one [unclear text] during the startup of the drawing unit during the spinning process. Further drafting roller pairs and/or belt roller pairs are driven.
  • This embodiment of the invention makes it possible to avoid fluctuations during the start-up of the output roller pair, which would prevent fibers from being conveyed at the speed specified by the rest of the drafting unit and which could lead to additional distortion of the fiber strip or a build-up of fibers.
  • the output roller pair is decoupled from the at least one further drafting roller and/or belt roller pair (which is stationary or operated only at a specific holding speed), to raise the prepared fiber strip and convey it into the vortex chamber of the air spinning device.
  • the drafting unit is stopped after combing and then raised for spinning. This embodiment of the invention ensures with particular reliability that the free fiber strip end is positioned in the vortex chamber at the beginning of the spinning process in the desired manner for connection with the free yarn end.
  • Characteristic of the drafting unit for conveying a fiber ribbon towards an inlet opening of a vortex chamber of an air-jet spinning device, wherein the drafting unit has an output roller pair that can be driven independently of at least one further drafting unit roller pair and/or belt roller pair, is a control unit for carrying out the method described above, according to the invention or further developed, for operating a drafting unit after a spinning interruption.
  • the control unit can be arranged directly at the spinning station or, according to an advantageous embodiment of the invention, be integrated into a central control unit for more than one spinning station or the air-jet spinning machine.
  • the central control unit can preferably be a mobile or stationary device outside the spinning station and/or air-jet spinning machine.
  • the control unit is designed to variably adjust the combing speed and/or the holding speed, thus enabling optimal adaptation to the fibers.
  • the Fig. 1 Figure 1 schematically shows a front view of a textile machine, usually referred to as a cross-coil 9, which produces coils; in this case, it is an air-jet spinning machine 1.
  • Such textile machines 1 have a plurality of spinning stations 2 between machine frames 13a, 13b arranged at the machine ends.
  • a spinning can 3 is positioned at each of the spinning stations 2, which is equipped with a supply of feed material, for example, fiber ribbon 25.
  • the spinning stations 2 each also have a drafting unit 4, an air spinning device 5, a take-up device 6, a yarn cleaner 7, and a yarn changing device 8, which ensures that the yarn 36 spun or produced from the fiber sliver 25 in the air spinning device 5 is wound onto a winding bobbin 9 in intersecting layers.
  • the resulting cross-wound bobbin 9 is held, as usual, in a bobbin frame (not shown) and is rotated by a bobbin drive (also not shown).
  • Each of the spinning stations 2 is also equipped with a thread receiving device 39, which makes it possible to receive a thread end 37 of a manufactured thread 36 that has run up onto the cross bobbin 9 after a spinning interruption and to transfer it to a so-called thread preparation device 40 located in the area of the take-off device 6.
  • FIG. 2 Figure 5 shows, in side view and on a larger scale, an air spinning device 5 suitable for carrying out the method according to a preferred embodiment during the spinning process.
  • the air-jet spinning device 5 shown in the cross-section is preceded by the drawing unit 4 for drawing the fiber strip 25.
  • a take-off device 6 Downstream of the air-jet spinning device 5, in the fiber strip direction R, is a take-off device 6, which can be driven by a single motor and is reversible. installed, which ensures that the manufactured thread 36 can be conveyed in the direction of the feed spool 9 and in the opposite direction.
  • the thread preparation device 40 which is not shown in detail here, is also arranged, which prepares the thread end 37 of the finished thread 36, which has been retrieved by the thread take-up device 39, for the subsequent spinning process.
  • the air spinning device 5 essentially consists of a two-part outer housing 14, 15, an expansion housing 16, a nozzle block 17, a fiber belt guide 18 and a hollow spinning cone 19.
  • the expansion housing 16 in conjunction with the front housing part 14 of the outer housing, forms a front annular space 20, which is connected to a pressure source 22 via a pneumatic line 21 and is connected to the expansion space 28 located in the rear housing part 15 of the outer housing.
  • the annular space 20 is pneumatically connected throughout to at least one blowing air nozzle 23, which is arranged in the nozzle block 17.
  • the blowing air nozzle 23 opens into a vortex chamber 33 in the area in front of the inlet opening 35 of the spinning cone 19 and is directed towards the head 24 of the spinning cone 19 in such a way that a rotating airflow is established at the head.
  • the spinning cone 19 is preferably made of a highly wear-resistant material, for example, a technical ceramic material.
  • the pneumatic line 21 is equipped with a valve 32, the actuation of which is preferably carried out by a spinning station-specific control unit 38, which is connected to the valve via appropriate control lines.
  • the fiber strip 25, stored in a spinning can 3 first passes through the drafting unit 4 on its way to the cross-wound bobbin 9, where it is strongly stretched.
  • the stretched fiber strip 25 is then fed via the output roller pair 26 of the drafting unit 4 into the area of the inlet opening 27.
  • the fiber sliver 25 is transferred to the air spinning device 5 and, under the influence of a negative pressure flow present there, is drawn into the vortex chamber 33 of the air spinning device 5.
  • the stretched fiber sliver 25 passes via the fiber sliver guide 18 and the nozzle block 17 to the inlet opening 35 of the hollow spinning cone 19 and is drawn into the spinning cone 19 by the thread 36 forming within the spinning cone 19.
  • the fiber sliver 25 is thereby exposed to the influence of a rotational flow in the region of the head 24 of the spinning cone 19, which is generated by the airflow exiting the nozzle block 17.
  • valve 32 To direct this airflow, initiated by the overpressure source 22, to the nozzle block 17, the valve 32 is open. To allow the airflow entering via the nozzle block 17 to escape through the exhaust duct 29 to the ambient atmosphere or to a machine-integrated extraction system during the spinning process, a valve 34, connected to the control unit 38 via a corresponding control line, is open.
  • the continuous movement of the fiber strip 25 in the fiber strip direction R continuously draws the fiber strip 25 into the hollow spinning cone 19, whereby the outer fibers are helically wound around the core fibers of the fiber strip 25.
  • the resulting yarn 36 is drawn from the air spinning device 5 by means of the yarn take-up device 6 and then wound onto a cross-wound bobbin 9.
  • the spinning process is interrupted, for example due to a break in the fiber band 25 or due to a controlled cut of the already spun thread 36 by the thread cleaner 7, a start-up process must first be carried out before restarting the spinning process.
  • the yarn end 37 of the already completed yarn 36 is first retrieved from the cross-wound bobbin 9 by the yarn receiving device 39 of the affected spinning station 2 and placed in one of the air spinning devices 5 in The fiber tape is transferred downstream to the thread preparation device 40 in the direction of travel R. There, the thread end 37 is largely freed from twisting and loose fibers and then transferred to the vortex chamber 33 for spinning and positioned there.
  • the drafting unit 4 is operated by the control unit in a combing operation, in which the first drafting unit roller pair 42, the second drafting unit roller pair 43 and the belt roller pair 41 are stationary, whereas the output roller pair 26 is operated at a combing speed and thereby optimally prepares the free end of the fiber strip 25 for the spinning process.

Landscapes

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

Claims (5)

  1. Procédé pour faire fonctionner un système d'étirage (4) ayant une paire de cylindres de sortie (26) et au moins une paire de cylindres de système d'étirage supplémentaire (42, 43) et/ou une paire de cylindres à manchon (41), au moyen desquels un ruban de fibres (25) est amené à un poste de filage (2) d'une machine à filer à jet d'air (1) pour la production d'un fil (36) vers une chambre à vortex (33) du dispositif de filage à jet d'air (5) du poste de filage (2), dans lequel la paire de cylindres de sortie (26) peut être entraînée de manière découplée de l'au moins une paire de cylindres de système d'étirage supplémentaire (42, 43) et/ou de cylindres à manchon (41),
    caractérisé en ce que
    la paire de cylindres de sortie (26) pour le peignage de l'extrémité du ruban après une interruption du filage est entraînée à une vitesse de peignage prédéterminée, l'extrémité du ruban étant conditionnée par la paire de cylindres de sortie (26) pendant le peignage, l'au moins une paire de cylindres de système d'étirage (42, 43) et/ou de cylindres à manchon (41) située en amont de la paire de cylindres de sortie (26) dans la direction de défilement (R) du ruban est actionnée à une vitesse de retenue qui est associée à la vitesse de peignage et qui s'élève à un maximum de 10 % de la vitesse de peignage, et le système d'étirage (4) est arrêté après le peignage, puis démarré pour le rattachage.
  2. Procédé selon la revendication 1, caractérisé en ce que la paire de cylindres de sortie (26) est entraînée avant l'au moins une paire de cylindres de système d'étirage supplémentaire (42, 43) et/ou la paire de cylindres à manchon (41) lorsque le système d'étirage (4) est démarré pendant le rattachage.
  3. Système d'étirage pour transporter un ruban de fibres (25) en direction d'une ouverture d'entrée (35) d'une chambre à vortex (33) d'un dispositif de filage à jet d'air (5), dans lequel le système d'étirage (4) a une paire de cylindres de sortie (26) qui peut être entraînée de manière découplée de l'au moins une paire de cylindres de système d'étirage supplémentaire (42, 43) et/ou d'une paire de cylindres à manchon (41),
    caractérisé par
    une unité de commande (38) pour mettre en oeuvre le procédé de fonctionnement d'un système d'étirage (4) après une interruption du filage selon une ou plusieurs des revendications 1 et 2.
  4. Système d'étirage selon la revendication 3, caractérisé en ce que l'unité de commande (38) est intégrée dans une unité de commande centrale de la machine à filer à jet d'air (1).
  5. Système d'étirage selon la revendication 3 ou 4, caractérisé en ce que l'unité de commande (38) est conçue pour régler de manière variable la vitesse de peignage et/ou la vitesse de retenue.
EP23217638.8A 2022-12-22 2023-12-18 Préparation de ruban de fibres Active EP4389948B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU503240A LU503240B1 (de) 2022-12-22 2022-12-22 Faserbandvorbereitung

Publications (2)

Publication Number Publication Date
EP4389948A1 EP4389948A1 (fr) 2024-06-26
EP4389948B1 true EP4389948B1 (fr) 2025-11-19

Family

ID=84923206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23217638.8A Active EP4389948B1 (fr) 2022-12-22 2023-12-18 Préparation de ruban de fibres

Country Status (6)

Country Link
US (1) US12258685B2 (fr)
EP (1) EP4389948B1 (fr)
JP (1) JP2024091492A (fr)
CN (1) CN118241345B (fr)
LU (1) LU503240B1 (fr)
MX (1) MX2023014009A (fr)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413894A1 (de) * 1983-04-15 1984-10-25 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Verfahren zum ansetzen eines garnendes
JP2708001B2 (ja) * 1995-02-10 1998-02-04 村田機械株式会社 紡績機の糸継ぎ装置
KR100296977B1 (ko) * 1996-01-30 2001-11-22 무라타 기카이 가부시키가이샤 방적기의피이싱방법
DE50104822D1 (de) * 2000-11-08 2005-01-20 Rieter Ag Maschf Steuerung von Spinnstellen in einer Spinnmaschine
EP1219737B2 (fr) * 2000-12-22 2012-01-18 Maschinenfabrik Rieter Ag Procédé pour rabouter ou mettre en place un fil crée dans une unité de filature, ladite unité étant equipée pour la mise en oeuvre du procédé
DE10102379A1 (de) 2001-01-19 2002-07-25 Rieter Ag Maschf Antriebssteuerung für Spinnmaschine
DE10201577A1 (de) 2002-01-17 2003-07-31 Schlafhorst & Co W Spinnvorrichtung zur Herstellung eines gesponnenen Fadens mittels eines umlaufenden Luftstroms
JP3575470B2 (ja) * 2002-03-18 2004-10-13 村田機械株式会社 紡績方法及びその装置
EP1375709B1 (fr) * 2002-06-21 2014-08-06 Maschinenfabrik Rieter Ag Procédé de rattache pour, ou rattachement dans, des postes de filature des métiers à filer à vortex d'air
DE10353317B4 (de) * 2003-11-10 2013-06-27 Wilhelm Stahlecker Gmbh Verfahren und Vorrichtung zum Wiederherstellen eines zuvor unterbrochenen Spinnvorganges
EP1564317A1 (fr) * 2004-02-10 2005-08-17 Maschinenfabrik Rieter Ag Méthode pour obtenir une partie de fil rattachée de masse constante dans un procédé de filage à vortex
DE102004050968A1 (de) 2004-10-15 2006-04-20 Wilhelm Stahlecker Gmbh Verfahren zum Vorbereiten eines Ansetzvorganges an einer Luftdüsenspinnvorrichtung
CH709953A1 (de) * 2014-07-30 2016-02-15 Rieter Ag Maschf Verfahren zum Betrieb einer Luftspinnmaschine.
JP2018090923A (ja) * 2016-12-01 2018-06-14 村田機械株式会社 紡績機及び紡績方法
DE102017115939A1 (de) * 2017-07-14 2019-01-17 Saurer Spinning Solutions Gmbh & Co. Kg Verfahren zum Betreiben einer Luftspinnvorrichtung, Fadenleitkanal und Luftspinnmaschine umfassend einen solchen Fadenleitkanal

Also Published As

Publication number Publication date
CN118241345A (zh) 2024-06-25
CN118241345B (zh) 2026-04-28
JP2024091492A (ja) 2024-07-04
LU503240B1 (de) 2024-06-24
US12258685B2 (en) 2025-03-25
EP4389948A1 (fr) 2024-06-26
MX2023014009A (es) 2024-06-24
US20240209551A1 (en) 2024-06-27

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