EP1673496A1 - Procede pour preparer la reprise d'un processus de filature - Google Patents

Procede pour preparer la reprise d'un processus de filature

Info

Publication number
EP1673496A1
EP1673496A1 EP04765802A EP04765802A EP1673496A1 EP 1673496 A1 EP1673496 A1 EP 1673496A1 EP 04765802 A EP04765802 A EP 04765802A EP 04765802 A EP04765802 A EP 04765802A EP 1673496 A1 EP1673496 A1 EP 1673496A1
Authority
EP
European Patent Office
Prior art keywords
thread
spinning
air nozzle
spinning process
compressed 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Withdrawn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
EP04765802A
Other languages
German (de)
English (en)
Inventor
Gernot SCHÄFFLER
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 EP1673496A1 publication Critical patent/EP1673496A1/fr
Withdrawn legal-status Critical Current

Links

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
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/002—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for false-twisting spinning machines
    • 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

Definitions

  • the invention relates to a method for preparing the restoration of a spinning process after an interruption of the spinning process on a spinning device having an air nozzle unit, wherein one end of an already spun thread against its operational spinning direction through the air nozzle unit back into a thread store, temporarily positioned there and then the Thread is transported again in the spinning direction.
  • the invention further relates to a device for carrying out the method, with an air nozzle unit, with an upstream drafting system and with a thread storage device, likewise upstream of the air nozzle unit, designed as a suction tube for temporarily receiving one end of a thread already threaded in the air nozzle unit.
  • a method and a device of this type are known from EP 0 807 699 B1.
  • the thread accumulator designed as a suction tube is located here between the drafting system and the air nozzle unit and receives both the end of the thread that is threaded through the air nozzle unit in the opposite direction to its spinning direction as well as a staple fiber bond to be connected to this thread. There is an overlap between the thread and the staple fiber structure in the suction tube.
  • the thread is not prepared for the restoration of the spinning process, it can connect more or less randomly to the fiber structure as soon as it is transported together with the fiber structure in the spinning direction.
  • the object of the invention is to prepare the thread to be attached to the staple fiber dressing in preparation for the restoration of a spinning process in such a way that a good quality connection point can be produced.
  • the object of the method is achieved in that the end of the thread is separated as waste in the thread store and a new thread end is created, which is prepared for the restoration of the spinning process.
  • the invention is based on the knowledge that the old end of the thread usually looks very arbitrary when the spinning process is interrupted, and thus precludes the fact that exactly reproducible conditions are present when the spinning process is restored. It is therefore provided that the torn end of the thread to be newly attached to the staple fiber dressing should be discharged as waste, the length of the thread should be such that the new thread end is in any case on a perfectly spun area of the thread.
  • the new thread end is then to be prepared for the restoration of the spinning process, for example on the one hand to produce a taper according to EP 1 219 737 A1 mentioned and on the other hand with regard to its length, so that reproducible conditions are always present.
  • the separation point for generating a new thread end is first prepared by blowing on it with compressed air. If the old end to be removed is then separated by pulling the thread apart, a brush-like tapering of the new thread end inevitably results, by means of which material thickening when connecting to the staple fiber bandage is reduced. This prepared new thread end has not been affected by the previous interruption of the spinning process, because. yes the old end is discharged as waste. By blowing with compressed air, the location of the separation point is fixed, so that there are always reproducible conditions with regard to the length of the new thread end. The waste piece can be discharged into the vacuum source connected to the suction pipe.
  • the end to be discharged as waste is advantageously clamped and the thread to be connected to the staple fiber dressing is then transported in its operational spinning direction and thereby pulled apart and separated from the piece of waste. It can therefore be used here to prepare the new thread end an already occurring transport of the thread. This transport is then expediently carried out by a pair of delivery rollers involved in the spinning process.
  • the thread storage device designed as a suction tube, has a clamping point for temporarily holding the thread and a compressed air nozzle for blowing on the thread.
  • the delivery roller pair mentioned is expediently the output roller pair of the drafting system arranged upstream of the air nozzle unit.
  • the reproducible length of the new thread end can be achieved in that the compressed air nozzle is at a predeterminable distance from the pair of output rollers of the drafting system or from the air nozzle unit.
  • the thread store containing the suction tube is part of a maintenance device assigned to a plurality of spinning devices. As a result, the effort required to prepare a new thread end can be kept particularly low.
  • FIG. 1 shows a schematic illustration of a spinning device containing an air nozzle unit with a thread store according to the invention
  • the spinning device shown only partially and schematically in FIG. 1 is used for spinning a thread 1 from a staple fiber dressing 2.
  • the spinning device contains as essential components an air nozzle unit 3, which for example corresponds to the one mentioned EP 1 219 737 A1 can be formed, furthermore a drafting device 4, preferably designed as a three-cylinder drafting device, furthermore a pair of draw-off rollers 5 and a winding device (not shown).
  • the staple fiber structure 2 is stretched in the draft direction A to the desired fineness in a known manner.
  • the draft zone ends at a pair of delivery rollers 6 which contains a lower roller 7 which can be driven and a pressure roller 8 which can be swiveled into position 8 '.
  • This pair of delivery rollers 6 forms the pair of output rollers of the drafting device 4.
  • the air nozzle unit 3 contains a feed channel 9, to which the stretched, still rotation-free staple fiber bandage 2 is fed to give its spinning twist, and a thread take-off channel 10 for the spun thread 1.
  • a swirl chamber not shown, in which the the actual twist distribution takes place, as described, for example, in EP 1 219 737 A1 mentioned.
  • the direction of spinning is designated B.
  • the take-off roller pair 5 which also contains a swiveling pressure roller, is followed in the take-off direction C by the winding device (not shown), which receives a package on which the spun thread 1 is wound.
  • the normal spinning process is sometimes interrupted by any circumstances, for example after a thread break. In such a case, the spinning process must be restored. It is advisable to temporarily stop the drives if the spinning process is interrupted.
  • a few preparatory steps are required to restore the spinning process.
  • a piece of the thread 1 already spun here provided with the reference number 11, must be conveyed manually or automatically through the air nozzle unit 3 against the normal spinning direction B, so that this thread 11 with the beginning of the staple fiber assembly 2 still located in the drafting device 4 again can be connected.
  • the old end 12 of the thread 11 to be connected to the staple fiber dressing 2 is generally not suitable. It is therefore separated in the thread storage 13 as waste 16 from the thread 11 and discharged in direction D into the vacuum source. At a separation point 20, a new suitable thread end 15 is instead created in the thread store 13, see also the later description of FIGS. 2 to 4.
  • the thread storage device 13 which is designed as a suction tube 14, has on the one hand a clamping point 17 for temporarily holding the thread 11 and a compressed air nozzle 18 for blowing on the thread 11.
  • the clamping point 17 can be actuated in the directions of the double arrow with the assistance of a compression spring, and the actuating valve 19 is assigned to the compressed air nozzle 18.
  • the separating needle 20 on the thread 11 is first prepared by blowing on it with compressed air.
  • the new thread end 15 can then be separated from the waste piece 16 by pulling the thread 11 apart. Due to the pneumatic preparation, the new thread end 15 is always created at the separation point 20, that is to say at a predetermined position.
  • the thread piece to be discharged as waste 16 is clamped at the clamping point 17.
  • the thread 11 with the new thread end 15 can be transported in the spinning direction B by the pair of delivery rollers 6 that have been closed again in conjunction with the pair of draw-off rollers 5 that are also closed again.
  • the transport of the staple fiber association 2 is also switched on, so that a connection point is created between the thread 11 and the staple fiber association 2 with a predetermined overlap length.
  • an exhaust air opening 21 can optionally be provided in the region of the separation point 20.
  • the thread store 13 is advantageously a component of a movable maintenance device 22 and is positioned exactly in a predetermined position in relation to the spinning device requiring maintenance.
  • the separation point 20 then always has a predeterminable distance x from the delivery roller pair 6.
  • the separation point 20 is determined by the position of the compressed air nozzle 18. Whether the distance x is now up to the pressure roller 8 of the delivery roller pair 6 or also up to the entrance opening of the Feed channel 9 or otherwise dimensioned is ultimately unimportant. It is only essential that the new thread end 15 is at a predeterminable point during its transport in the spinning direction B when it is reconnected to the staple fiber structure 2.
  • FIG. 2 first shows the thread 11 threaded through the air nozzle unit 3 against its spinning direction B with its old, unusable end 12.
  • the thread 11 is spun perfectly at a sufficient distance from this end 12. Because of the special spinning method used here, which uses an air nozzle unit 3, the thread 11 is not rotated uniformly, but rather has a special rotational character.
  • the thread 11 largely has a core of fibers or fiber regions running essentially in the longitudinal direction of the thread without substantial rotation, as well as an outer region in which the fibers or fiber regions are twisted around the core like a thread.
  • the core fibers 23 and the outer wrapping fibers 24 can thus be seen in the schematic illustration in FIG. 2.
  • the area of the separation point 20 is identified by a dash-dotted circle.
  • the thread 11 in the intake manifold 14 is blown transversely through the compressed air nozzle 18.
  • the thread 11 can already be clamped in the clamping point 17 at this time, but this is not absolutely necessary. Blowing with compressed air causes the wrapping fibers 24 to be dissolved by being partially rotated in the opposite direction, so that the binding effecting the strength of the thread 11 at the separation point 20 is disturbed and the thread 11 thereby receives a weak point at which he.
  • the waste piece 16 containing the old end 12 is clamped at the clamping point 17 and the thread 11 is transported in its spinning direction B, then the thread 11 is severed at the separating point 20, specifically at a predetermined point, with its new thread end 15 runs out to a tapering thread tip.
  • This new thread end 15 is suitable to be connected to the staple fiber dressing 2 without major thread thickening.
  • the waste piece 16 containing an uncontrolled end 12, the appearance of which depends on randomness, can be removed.

Landscapes

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

Abstract

L'invention concerne un procédé et un dispositif destinés à un dispositif de filature comprenant un ensemble de buses d'air et servant à préparer la reprise du processus de filature après une interruption. Selon l'invention, une extrémité d'un fil déjà filé est ramenée, à l'encontre de son sens de filature conforme au fonctionnement, à travers l'ensemble de buses d'air jusque dans un réservoir de fil. L'extrémité du fil est séparée en tant que rebut dans le réservoir de fil, ce qui crée une nouvelle extrémité de fil qui est préparée pour la reprise du processus de filature. Le point de sectionnement est préparé par soufflage d'air comprimé, puis l'extrémité à évacuer comme rebut est séparée par étirement du fil. Le réservoir de fil est de préférence réalisé sous forme de tube d'aspiration auquel sont affectés un emplacement de serrage pour l'immobilisation provisoire du fil, ainsi qu'une buse d'air comprimé servant à souffler sur le fil.
EP04765802A 2003-10-15 2004-10-05 Procede pour preparer la reprise d'un processus de filature Withdrawn EP1673496A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10348895A DE10348895A1 (de) 2003-10-15 2003-10-15 Verfahren zum Vorbereiten des Wiederherstellens eines Spinnvorganges
PCT/EP2004/011070 WO2005038103A1 (fr) 2003-10-15 2004-10-05 Procede pour preparer la reprise d'un processus de filature

Publications (1)

Publication Number Publication Date
EP1673496A1 true EP1673496A1 (fr) 2006-06-28

Family

ID=34442150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04765802A Withdrawn EP1673496A1 (fr) 2003-10-15 2004-10-05 Procede pour preparer la reprise d'un processus de filature

Country Status (6)

Country Link
US (1) US20070125061A1 (fr)
EP (1) EP1673496A1 (fr)
JP (1) JP2007508471A (fr)
CN (1) CN1867709A (fr)
DE (1) DE10348895A1 (fr)
WO (1) WO2005038103A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ303614B6 (cs) * 2011-11-28 2013-01-09 Maschinenfabrik Rieter Ag Zpusob a zarízení k brzdení príze, zejména pri obnovování predení na pracovním míste tryskových doprádacích stroju
DE102012108380A1 (de) 2012-06-19 2013-12-19 Maschinenfabrik Rieter Ag Luftspinnmaschine und Verfahren zum Betrieb derselben
DE102013102770A1 (de) * 2013-03-19 2014-09-25 Maschinenfabrik Rieter Ag Spinnstelle einer Spinnmaschine sowie Verfahren zum Betrieb derselben
DE102014107846A1 (de) * 2014-06-04 2015-12-17 Maschinenfabrik Rieter Ag Verfahren und eine Fadentrennvorrichtung zum Klemmen und Trennen eines Fadens
JP2017075438A (ja) * 2015-10-13 2017-04-20 マスチネンファブリック ライター アーゲーＭａｓｃｈｉｎｅｎｆａｂｒｉｋ Ｒｉｅｔｅｒ Ａｇ エアジェット紡糸機
JP2019064804A (ja) * 2017-10-03 2019-04-25 村田機械株式会社 糸継ノズル、糸継装置、糸巻取装置及び糸巻取方法
JP2021038476A (ja) * 2019-08-30 2021-03-11 村田機械株式会社 紡績機の管理装置及び管理装置付き紡績機
DE102021105058A1 (de) 2021-03-03 2022-09-08 Maschinenfabrik Rieter Ag Spinnstelle einer Luftspinnmaschine sowie Garnbremse für eine Spinnstelle einer Luftspinnmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3425349A1 (de) * 1984-07-10 1986-01-16 Schlafhorst & Co W Verfahren und vorrichtung zum herstellen einer fadenverbindung durch spleissen
JPH0791707B2 (ja) * 1987-07-21 1995-10-04 村田機械株式会社 紡績装置における糸継方法および装置
CH684836A5 (de) * 1991-07-25 1995-01-13 Rieter Ag Maschf Verfahren zur Steuerung der Arbeitsabläufe zwischen einem Bedienungsautomaten und einer Spinnstelle einer Textilmaschine.
JP2930010B2 (ja) * 1996-05-16 1999-08-03 村田機械株式会社 紡績機のピーシング方法及びその装置
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
DE10150565B4 (de) * 2001-10-15 2011-10-06 Rieter Ingolstadt Gmbh Verfahren und Vorrichtung zur Vorbereitung eines abgelängten Fadenendes für das Wiederanspinnen einer Offenend-Spinnvorrichtung
DE10160455A1 (de) * 2001-12-04 2003-06-18 Schurr Stahlecker & Grill Verfahren zum Vorbereiten eines Anspinnvorganges an einem Offenend-Rotorspinnaggregat

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005038103A1 *

Also Published As

Publication number Publication date
DE10348895A1 (de) 2005-05-19
JP2007508471A (ja) 2007-04-05
WO2005038103A1 (fr) 2005-04-28
US20070125061A1 (en) 2007-06-07
CN1867709A (zh) 2006-11-22

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