EP3556918B1 - Agencement de levage de fil pour unité de rattachement et procédé associé - Google Patents

Agencement de levage de fil pour unité de rattachement et procédé associé Download PDF

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Publication number
EP3556918B1
EP3556918B1 EP19168570.0A EP19168570A EP3556918B1 EP 3556918 B1 EP3556918 B1 EP 3556918B1 EP 19168570 A EP19168570 A EP 19168570A EP 3556918 B1 EP3556918 B1 EP 3556918B1
Authority
EP
European Patent Office
Prior art keywords
yarn
jet
cop
air current
orifices
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
EP19168570.0A
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German (de)
English (en)
Other versions
EP3556918A1 (fr
Inventor
Srinivasan RAJASEKARAN
Jeganathan Pasupathy
Arulanandam Thilip Kumar
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.)
Lmw Ltd
Original Assignee
Lakshmi Machine Works Ltd
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Publication date
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Publication of EP3556918A1 publication Critical patent/EP3556918A1/fr
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Publication of EP3556918B1 publication Critical patent/EP3556918B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
    • B65H67/083—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement handling the yarn-end of the new supply package
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to textile machines, particularly the invention relates to broken yarn lifting arrangement to detach the broken yarn end from the spinning cop to enable automatic piecing operation in textile ring spinning machines.
  • Ring spinning machines are the most crucial machines in textile spinning mills.
  • the said ring spinning machines delivers the final stage of cotton in spinning line, so called yarn.
  • yarn breakage occurs frequently, and it is to be continuously monitored and pieced by the manual labours.
  • the yarn breakage occurs due to various parameters of yarn and machine and it is unavoidable.
  • the broken yarn thread normally tangles with the wound yarn in the cop at any portion from top to bottom of the cop which cannot be adjudged precisely.
  • manual labours continuously watch for yarn breakages and perform manual piecing of broken yarns. This has to be done for a machine frame normally consisting of more than 1600 spindles. Then, yarn spinning sequence has to be restarted then and there after yarn breakage in order to resume yarn spinning and to avoid wastage of yarn.
  • the automatic piecing unit is in the form of a movable vehicle with wheels/rails.
  • the said piecing vehicle stops at respective spindle units which require piecing attention.
  • the piecing unit in general moves longitudinally over the machine frame aisles. Before initiating piecing operation, the piecing vehicle stops in front of the spindle position of ring spinning machine. Then the broken yarn end which is available in the spinning cop has to be found and detached from the cop and lifted above to enable piecing operation.
  • the said detaching of yarn from spinning cop is not successfully done so far in any known type of automatic piecing units.
  • US 4 132 057 A discloses a yarn lifting arrangement for a yarn piecing unit in a textile ring spinning machine according to the preamble of claim 1.
  • DE 39 24 285 A1 and DE 10 2015 007 820 A1 each disclose a yarn lifting arrangement with a plurality of jet members to improve the separation of the yarn end from the cop.
  • the present invention provides an improved arrangement for detaching the broken yarn end from the spinning cop to enable automatic piecing in ring spinning machines.
  • the main object of the present invention is to provide a yarn lifting arrangement for a yarn piecing unit in a textile ring spinning machines.
  • the present invention provides a yarn lifting arrangement for a yarn piecing unit in a textile ring spinning machine according to claim 1.
  • the present invention provides a method for lifting a yarn by a piecing unit according to claim 6.
  • Automatic piecing unit is provided for textile ring spinning machines.
  • the automatic piecing unit moves longitudinally along the aisle of the ring spinning machine.
  • the ring spinning machine is capable of winding yarn onto a bobbin mounted to spinning spindle, so called cop.
  • the present invention is provided with a yarn lifting arrangement in the automatic piecing unit.
  • Figures 1 and 2 illustrates the schematic view of the yarn lifting arrangement, according to the present invention.
  • a yarn lifting arrangement (102) for an automatic yarn piecing unit (100) comprising of a base plate (104) having a first end and a second end.
  • the first end connected to an actuating means (106) provides the base plate (104) working position in the forward motion and home position in the backward motion.
  • the actuating means (106) is at least a pneumatic piston - cylinder actuator preferably or the like.
  • the second end is a free end having an opening near to the free end configured to encircle a cop (110) of a spindle (112) in the working position.
  • said opening is in semicircular shape.
  • Said yarn lifting arrangement (102) further comprises plurality of jet members (108) configured to position around the contour of the opening, supplying air current in the working position to detach the tangled yarn end from the spinning cop (110) and to lift the yarn upwars towards the drafting zone to enable effective automatic yarn piecing in the textile machine.
  • the corresponding figure 3A illustrates the side view of the yarn lifting arrangement in the automatic piecing unit and winding cop of ring spinning machine in which broken yarn is to be lifted
  • figure 3B illustrates broken yarn is lifted and sucked upwards into the top suction unit in front of the drafting zone of the ring spinning machine, according to the present invention.
  • the jet member (108) is a block having plurality of orifices (118B) on the tapered surface formed at an acute angle between the top face and the side facing said cop.
  • the air purging hole of the orifices (118B) of the jet members (108) forms an acute angle with respect to the vertical.
  • the acute angle between the orifice (118B) and the vertical is in the range of 15 degrees to 30 degrees, preferably 20 degrees.
  • the diameter of the orifice (118B) is preferably 2mm.
  • the block has a through hole (118A) along the horizontal axis parallel to line of position of the plurality of orifices (118B) such that air from a suction source is transferred to plurality of orifices (118B) through hole (118A).
  • the block can also be provided with hole along the horizontal axis perpendicular to line of position of the plurality of orifices (118B).
  • Figures 4 illustrates the schematic view of a jet member, and the corresponding figures 4A, 4B illustrates the top view and cross-sectional view the of a jet member.
  • the number of jet members (108) in a yarn lifting arrangement (102) is three.
  • the jet members can also be a common unit according to an embodiment.
  • the jet members are positioned on the contour of the opening at an included angle of 90 degrees between them.
  • the first jet member (108B) is placed in front of the spinning cop in substantially parallel manner to the length of the ring spinning frame.
  • the second and third jet members (108A, 108C) are placed in substantially perpendicular manner to the length of the ring spinning frame, one each at the sides of the spinning cop.
  • each of the jet members (108A, 108B, 108C) are provided with three orifices (118B).
  • the yarn lifting arrangement (102) is actuated to move forward to reach working position in which jet members (108) are positioned concentrically around the cop (110) of the spindle (112) in front of the ring rail of ring spinning machine (not shown) slightly below the ring rail position.
  • the cop (110) placed in the ring spinning spindle (112) is purged with air from the jet members (108).
  • the broken yarn (116) end is lifted from the cop (110) and caught into the suction unit (114) which is provided with controlled suction so as to not unwind the already wound cop (110).
  • the detached yarn end (112) is moved upwards into a controlled suction nozzle adjacent to the drafting unit to hold the yarn until piecing said yarn with the drafted roving material delivering from drafting zone.
  • the jet members are worked in the following sequence to achieve successful detaching and lifting of the broken yarn end from the spinning cop.
  • the jet members are positioned at a predetermined distance from spindle centre, along the contour of the opening.
  • spindle brake (not shown) is applied for a predetermined period in the range of 0.1 to 1 second, for example 0.7 seconds, spindle stops rotating.
  • the second and third jet members (side jets) are made to purge air jets through the plurality of orifices for a fraction of second in the range of 0.01 to 0.1 seconds, for example 0.05 seconds.
  • spindle brake is relieved for a predetermined period in the range of 0.1 to 0.5 seconds, for example 0.2 seconds, rotating the spindle.
  • the first jet member is made to purge air jet through the multiple / plurality of orifices for a fraction of second in the range of 0.01 to 0.1 seconds, for example 0.05 seconds.
  • the broken yarn end is detached from the spinning cop irrespective of its position anywhere from top to bottom and directed upwards towards the drafting zone successfully.
  • the yarn end detached and directed upwards by the action of the jet members are sucked by another controlled suction unit placed at the top of the automatic piecing unit in front of the drafting zone of the ring spinning machine (not shown). Thereby, the broken yarn is lifted to enable automatic piecing with the drafted material.
  • the jet members are worked in the following sequence to achieve successful detaching and lifting of the broken yarn end from the spinning cop. Initially, the jet members are placed at a predetermined distance from spindle centre along the contour of the opening. The first jet member purges air jet when the spindle is applied brake for a predetermined time interval. Then, the spindle brake is relieved for a predetermined time interval in fraction of second. During that time, the second and third jet members purges air jet. As a result of the above said action, the broken yarn end is detached from the spinning cop and directed upwards to enable automatic piecing with the drafted material. The above sequence takes place irrespective of the ring rail position. The above sequences are example embodiments only. The three jet members are worked in any different sequences and any different time intervals. The jet members are not defined to three in total, it may also be more than three.
  • the lifting arrangement is placed in front of the ring rail slightly below the ring rail position such that it purges air towards the cop from plurality of orifices for lifting the broken yarn end from the cop.
  • the lifting arrangement can be advantageously placed at any position in front of the cop from top to bottom as an embodiment.
  • the lifting arrangement is positioned at the bottom portion of the spinning cop.

Landscapes

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

Claims (12)

  1. Agencement de soulèvement de fil (102) pour une unité de rattachage du fil (100) dans un métier à filer à anneaux, comprenant :
    un module de commande pour la régulation du mode d'injection de l'air vers une cannette (110), un socle (104) possédant un premier bout et un deuxième bout,
    ledit premier bout étant raccordé à un dispositif d'actionnement (106) en dotant ainsi ledit socle (104) d'une position de travail dans le mouvement en avant et d'une position de départ dans le mouvement en arrière,
    ledit deuxième bout étant un bout libre possédant une ouverture à proximité du bout libre, configurée pour encercler la cannette (110) d'une broche (112) dans sa position de travail ;
    caractérisé en ce que
    le socle (104) comprend en outre un premier élément de jet (108A), un deuxième élément de jet (108B), et un troisième élément de jet (108C), chacun étant doté de trois orifices (118B), configurés pour se positionner autour du pourtour de l'ouverture, en distribuant un courant d'air auxdits premier, deuxième et troisième éléments de jet (108A, 108B, 108C) pour purger des jets d'air à travers la pluralité d'orifices (118B), le socle (104) se trouvant dans sa position de travail pour détacher l'extrémité de fil emmêlée (116) de la cannette (110) et soulever le fil afin de permettre le rattachage du fil dans le métier à filer à anneaux, et les trois éléments de jet (108A, 108B, 108C) se trouvant tous à une distance égale de la cannette (110), et les trois éléments de jet 108A, 108B, 108C) recevant tous un courant d'air dans différentes séquences et à différents intervalles de temps.
  2. Agencement de soulèvement de fil selon la revendication 1, chaque élément de jet (108A, 108B, 108C) étant un bloc dont les trois orifices (118B) se trouvent sur la surface conique, lesdits orifices (118B) formant un angle aigu avec la verticale, et le bloc possédant un trou de passage (118A) le long de l'axe horizontal parallèle et/ou perpendiculaire à la ligne d'emplacement des orifices (118B) de façon à ce que de l'air provenant d'une source d'aspiration soit transféré aux orifices (118B) par le trou (118A).
  3. Agencement de soulèvement de fil selon la revendication 2, ledit angle aigu mesurant de 15 degrés à 30 degrés.
  4. Agencement de soulèvement de fil selon la revendication 1, les éléments de jet (108A, 108B, 108C) étant positionnés sur le pourtour de l'ouverture du socle (104) avec un angle inclus de 90 degrés entre eux.
  5. Agencement de soulèvement de fil selon la revendication 1, ledit dispositif d'actionnement (106) étant un dispositif d'actionnement pneumatique à piston et cylindre.
  6. Procédé de soulèvement d'un fil par une unité de rattachage (100) selon une des revendications 1 à 5, le procédé comprenant :
    le positionnement des trois éléments de jet (108A, 108B, 108C) autour du pourtour de l'ouverture du socle (104), de sorte que les trois orifices (118B) de chacun des éléments de jet (108A, 108B, 108C) soit saillant vers la cannette (110) de la broche (112) ;
    l'actionnement et le relâchement du frein de la broche pendant une période prédéterminée ;
    la distribution d'un courant d'air à travers lesdits éléments de jet (108) par les orifices (118B) avec différentes séquences et différents intervalles de temps ; et
    le détachement, de la cannette (110), de l'extrémité de fil emmêlée (116) par le biais du courant d'air provenant desdits éléments de jet (108), et le soulèvement du fil afin de permettre le rattachage du fil dans le métier à filer à anneaux.
  7. Procédé de soulèvement de fil selon la revendication 6, au moins deux éléments de jet (108A, 108B) étant pourvus initialement d'un courant d'air, et le troisième jet (108C) étant pourvu d'un courant d'air au bout d'un intervalle de temps prédéterminé afin de soulever le fil.
  8. Procédé de soulèvement de fil selon la revendication 6, au moins un élément de jet (108A) étant pourvu initialement d'un courant d'air, et les autres éléments de jet (108B, 108C) étant pourvus d'un courant d'air au bout d'un intervalle de temps prédéterminé afin de soulever le fil.
  9. Procédé de soulèvement de fil selon la revendication 6, les éléments de jet (108) étant pourvus un à un, à des intervalles de temps prédéterminés, de courants d'air afin de soulever le fil.
  10. Procédé de soulèvement de fil selon la revendication 6, lesdits éléments de jet (108) étant pourvus d'un courant d'air, et arrêtés de façon intermittente afin de soulever le fil.
  11. Procédé de soulèvement de fil selon la revendication 6, lesdits éléments de jet (108) étant pourvus d'un courant d'air lors de l'actionnement du frein de la broche pendant une période prédéterminée.
  12. Procédé de soulèvement de fil selon la revendication 6, lesdits éléments de jet (108) étant pourvus d'un courant d'air lors du relâchement du frein de la broche pendant une période prédéterminée.
EP19168570.0A 2018-04-20 2019-04-11 Agencement de levage de fil pour unité de rattachement et procédé associé Active EP3556918B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN201841015061 2018-04-20

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EP3556918A1 EP3556918A1 (fr) 2019-10-23
EP3556918B1 true EP3556918B1 (fr) 2024-09-18

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3913121B1 (fr) * 2020-05-22 2025-09-17 Lmw Limited Appareil automatique de rattachement de fil et son procédé
EP3981898B1 (fr) * 2020-10-12 2024-10-09 Lakshmi Machine Works Ltd. Agencement de frein de broche pour une unité de rattache de fil de machine à filer à anneaux
EP4249655B1 (fr) * 2022-03-22 2026-04-29 Lmw Limited Métier à filer à anneaux avec un dispositif amélioré de levage de fil dans une unité de rattache automatique et une méthode pour détacher et soulever un fil cassé d'une bobine

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504488A (en) * 1968-12-13 1970-04-07 Burlington Industries Inc Splicing device for yarns or the like
DE2350840C3 (de) * 1973-10-10 1979-07-05 Fritz 7341 Bad Ueberkingen Stahlecker Offenendspinnmaschine mit einer Vielzahl nebeneinander angeordneter Spinnaggregate
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DE3744758A1 (de) * 1987-03-02 1988-12-29 Schubert & Salzer Maschinen Verfahren und vorrichtung zum anspinnen einer mit einem pneumatischen drallorgan arbeitenden spinnvorrichtung
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DE3734565A1 (de) * 1987-10-13 1989-05-03 Schubert & Salzer Maschinen Verfahren und vorrichtung zum anspinnen eines fadens an einer offenend-spinnvorrichtung
DE3924285A1 (de) * 1989-07-22 1991-01-31 Zinser Textilmaschinen Gmbh Vorrichtung zum pneumatischen abloesen eines gebrochenen fadenendes
IT1248002B (it) * 1991-06-06 1995-01-05 Savio Spa Metodo per l'infilaggio pneumatico in un fuso a doppio perno cavo di un ritorcitoio
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CN204224770U (zh) * 2012-03-28 2015-03-25 拉卡什米机械厂有限公司 梳理机的丝网牵伸组件
JP2015174764A (ja) * 2014-03-18 2015-10-05 村田機械株式会社 撚掛ノズル、糸継ノズル構造体、糸継装置、巻取ユニット及び繊維機械
JP2016155648A (ja) * 2015-02-24 2016-09-01 村田機械株式会社 糸継装置及び糸巻取装置
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EP3556918A1 (fr) 2019-10-23
CN110387615B (zh) 2022-08-05
CN110387615A (zh) 2019-10-29

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