EP3748054B1 - Métier à filer à anneau comprenant un ensemble de rattachage automatique de fil et un appareil d'inclinaison de guide-fil - Google Patents

Métier à filer à anneau comprenant un ensemble de rattachage automatique de fil et un appareil d'inclinaison de guide-fil Download PDF

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Publication number
EP3748054B1
EP3748054B1 EP20177969.1A EP20177969A EP3748054B1 EP 3748054 B1 EP3748054 B1 EP 3748054B1 EP 20177969 A EP20177969 A EP 20177969A EP 3748054 B1 EP3748054 B1 EP 3748054B1
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EP
European Patent Office
Prior art keywords
yarn
lappet
automatic
piecing
tubular arrangement
Prior art date
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Active
Application number
EP20177969.1A
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German (de)
English (en)
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EP3748054A1 (fr
Inventor
Jeganathan Pasupathy
Masthigoundenpathy Giriraj Deepan Marudachalam
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.)
Lakshmi Machine Works Ltd
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Lakshmi Machine Works Ltd
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Classifications

    • 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 present invention relates to textile spinning machines. Particularly, the present invention relates to a ring spinning machine according to the preamble of claim 1.
  • ring spinning machines are generally employed for spinning of fibres, such as cotton, flax or wool, to produce a yarn.
  • Fiber material may be supplied to the ring spinning machines in the form of rovings.
  • the ring spinning machine draws the rovings to the desired degree of fineness and imparts sufficient twist, and finally forms a continuous yarn, which is then wound onto the bobbins for storage.
  • Yarn breakage is an unavoidable plight in the ring spinning machines during the spinning operation.
  • the piecing of the broken yarns is required for efficient and continuous operation of the ring spinning machine, and the process is called as yarn piecing.
  • Yarn piecing is a manual process in which the broken yarns are joined/ assembled. Hence, this process aids in restarting the yarn spinning sequence at a swift rate.
  • Yarn piecing process may be crucial in yarn spinning operation that determines the rate of productivity.
  • automatic piecing assembly With the advent of modern technology, automatic piecing assembly have been employed in the spinning mills over the manual piecing operation.
  • automatic piecing assemblies are mounted on guide rails provided in vicinity of frame of the ring spinning machines.
  • the automatic piecing assemblies may employ automatic piecing equipment like robotic arms or may be configured to accommodate an operator for piecing.
  • Said automatic piecing assemblies may traverse over the guide rails throughout the length of a frame of the ring spinning machine and carryout piecing operation at required spinning stations.
  • the piecing assemblies may be mounted on a platform, which traverse on the mill floor for carrying the piecing assembly throughout the length of the ring spinning machine for performing piecing operations.
  • automatic piecing assembly comprises plurality of modules for yarn pickup from bobbin, yarn insertion into the traveller and yarn piecing at drafting and the like.
  • Each spinning stations of a ring spinning machine comprises roving supply package, drafting unit, broken yarn collection tube, yarn breakage detection arrangement, yarn guide hook or lappet, balloon controller ring, ring-traveller assembly, yarn bobbin fitted on the rotating spindle, spindle driving assembly etc.
  • the delivered yarn from the drafting unit travels through lappet hook, balloon controller ring and then through ring traveller before winding on to the rotating bobbin.
  • the broken end of yarn from the bobbin has to be taken off up to the drafting unit for piecing it with delivery fibre federation.
  • Plurality of lappet hooks are serially mounted on a lappet rod of a spinning machine in such a way that one lappet hook for each spinning station.
  • Said lappet hook is a small convolute shaped steel pin with an eyelet located at the center thereof. The yarn passes through said eyelet of the lappet hook and guided properly to maintain a fixed path. Before piecing operation takes place, inserting the yarn into the lappet hook eyelet is a tricky process for an Automatic piecing unit because of the convolute hook construction in the lappet.
  • EP 0 518 029 A1 discloses a procedure and device for searching for a yarn end or for laying an auxiliary yarn at a cops respectively around a cops or empty tube.
  • EP 2 105 401 A2 is directed to a yarn end retrieving apparatus.
  • Said apparatus includes a yarn releasing device that sucks and releases a yarn end from a surface of a bobbin, a cutter device that cuts the yarn sucked out by the yarn releasing device and a cylinder elevating and lowering device that elevates and lowers a suction cylinder.
  • the cylinder elevating and lowering device is composed of a guide member, a slider that slidably elevates and lowers along the guide member, and a driving structure that uses a stepping motor as a driving source.
  • the suction cylinder is fixed to the slider so as to be moveable together with a slider. Power of the stepping motor is used to elevate and lower the suction cylinder.
  • An object of the present invention is to provide a lappet tilting apparatus in the yarn pickup module of an automatic yarn piecing assembly of textile ring spinning machines.
  • Another object of the present invention is to provide a lappet tilting apparatus that offers hassle-free yarn insertion into the lappet hook eyelet after tail yarn pickup from the bobbin.
  • the present invention provides a ring spinning machine according to claim 1.
  • the present invention provides a method of piecing a tail yarn by an automatic yarn piecing assembly in a textile ring spinning machine according to claim 9.
  • a ring spinning frame 1 the supply fibre federation or roving 2 is spun into yarn 3 by way of linear stretching using a drafting unit 4.
  • the produced yarn 3 is guided through a lappet hook 5, a balloon controller ring 6, a ring-traveller assembly (not shown) and subsequently wound on to a ring yarn bobbin 7 before further processing.
  • a ring spinning frame 1 during yarn breakage, there is a need for automatic yarn piecing to continue the ring spinning operation that is provided by an automatic yarn piecing assembly 8 for textile ring spinning machines to facilitate automatic piecing operation.
  • the automatic yarn piecing assembly 8 in a ring spinning frame 1 comprises a yarn pickup module 9 mounted on a vertical column.
  • the yarn pickup module 9 is configured to slide in both horizontal and vertical directions.
  • the yarn pickup module 9 has a suction bell unit mounted therein.
  • the suction bell unit has an elbow tubular arrangement 10 that has a first end and a second end. The first end is connected to a vacuum source (not shown), whereas the second end hangs freely. This free end forms a suction bell 11.
  • the suction bell 11 is an open mouth configuration defined at the second end of the elbow tubular arrangement 10. Accordingly, the first end and the second end are also defined as fixed end and free end respectively.
  • the elbow tubular arrangement 10 is flexible enough to move up and down in vertical direction.
  • said free end of elbow tubular arrangement 10 is provided with a lappet tilting apparatus 12 such that said lappet tilting apparatus 12 encircles the suction bell 11 and can slide over the elbow tubular arrangement 10 and makes impermanent slippery contact with a lappet hook 5 of ring spinning machine 1 during tail yarn pickup in a piecing operation. That is, lappet tilting apparatus 12 can be freely slidable in up and down direction over the suction bell 11 on the elbow tubular arrangement 10 as shown by arrow in the Figure 2 of the present invention.
  • the lappet tilting apparatus 12 has an upper portion and a lower portion that are connected and positioned along the common axis.
  • the upper portion has a tubular structure.
  • the lower portion has a configuration showing frustum of a hollow solid having a slant external surface.
  • the hollow solid can be a hollow cone or a pyramid.
  • the automatic yarn piecing assembly 8 further comprises a driving means coupled to the yarn pickup module 9 for moving the yarn pickup module 9 vertically up and down and horizontally far and away.
  • the driving means can be a pneumatic driving unit, or a hydraulic driving unit having piston and cylinder arrangement with actuators.
  • the drive means can also comprise of screw rod, cylinder and all types of actuating means.
  • the yarn piecing assembly 8 includes a control apparatus functionally connected with driving means comprising a control unit coupled with a plurality of sensors and stoppers for precisely controlling the movement of moving yarn pickup module 9 so as to move the suction bell 11 vertically up and down.
  • a negative pressure is created in elbow tubular arrangement 10 using vacuum source (not shown).
  • the automatic yarn piecing assembly 8 is positioned away from the lappet hook 5.
  • the yarn pickup module 9 of the suction bell unit is moved towards the yarn path by providing horizontal and vertical movement to the yarn pickup module 9 and vertical movement to the elbow tubular arrangement 10 such that the lappet tilting apparatus 12 hits a lappet hook 5 and makes it to swivel away from its home position wherein the swivelling action is supported by the lappet rod 13 mounted in the ring spinning machine 1.
  • the suction bell 11 accesses the yarn axis to suck the tail yarn 3 from bobbin 7.
  • the tail yarn 3 is picked on the bobbin 7 anywhere in the chase length from bottom to top.
  • Figure 4 illustrates the yarn 3 pickup for another chase length position at the top of the yarn bobbin 7. While the yarn 3 breaks at top chase wound length of the bobbin 7, it is difficult for the suction bell 11 to enter near the bobbin 7 because of the size of the tilting apparatus 12 which cannot penetrate through the balloon controller ring 6.
  • the bottom face of lappet tilting apparatus 12 seats over above the balloon controller ring 6 while the suction bell 11 moves down and penetrates further to reach the position above the yarn bobbin 7.
  • the lappet tilting apparatus 12 freely slides over the suction bell 11 on the elbow tubular arrangement 10. Meanwhile the lifted lappet hook 5 swivels out of yarn path because of the the support of tapered conical surface in tilting apparatus 12.
  • the suction bell 11 moves up from the yarn bobbin 7 after sucking the yarn 3 and engages with the tilting apparatus 12 that is resting over the balloon controller ring 6 and then the yarn pickup module 9 along with the suction bell 11 and lappet tilting apparatus 12 moves up further as a whole and carry the yarn 3 upwards further for piecing operation.
  • the lappet tilting apparatus 12 as described herein above provides a hassle-free yarn insertion into the lappet hook 5 eyelet and smooth functioning of automatic yarn piecing assembly 8 without any hindrance.
  • the suction bell 11 can be positioned above the bobbin 7 at a distance normally in the range of 5mm to 15mm for picking the tail yarn 3.
  • the lappet tilting apparatus 12 is capable of sliding over the suction bell 11 on the tubular arrangement 10 for a distance of approximately 60mm for allowing the suction bell 11 to efficiently pick the tail yarn 3 from the top chase length position of the bobbin 7 irrespective of the hindrance caused by the balloon controller ring 6.
  • the above described automatic piecing assembly for ring spinning machine provides a reliable solution for picking the broken yarn end from the bobbin and enables automatic piecing operation.
  • the elbow tubular arrangement with the suction bell and the lappet tilting apparatus is able to pick the broken yarn from the bobbin anywhere from bottom to top based on the broken yarn position.

Landscapes

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

Claims (9)

  1. Métier à filer à anneau (1) comprenant un crochet pivotant de guide-fil (5) et un ensemble de rattachage automatique du fil (8) pour le métier à filer à anneau, ledit ensemble de rattachage automatique du fil comprenant :
    un module de prélèvement du fil (9) monté sur une colonne verticale, ledit module de prélèvement du fil (9) étant capable de coulisser sur la colonne verticale dans une direction verticale et une direction horizontale ;
    un module de cloche d'aspiration monté sur le module de prélèvement du fil (9), ledit module de cloche d'aspiration possédant un agencement tubulaire coudé (10), l'agencement tubulaire coudé (10) possédant un premier bout et un deuxième bout, le premier bout étant raccordé à une source de vide créant une pression négative pour aspirer une queue de fil (3) d'une bobine de fil (7), le deuxième bout définissant une cloche d'aspiration (11), ledit agencement tubulaire coudé (10) étant flexible de façon à pouvoir se déplacer verticalement en haut et en bas ; caractérisé par
    un appareil d'inclinaison de guide-fil (12) agencé sur le deuxième bout de l'agencement tubulaire coudé (10), ledit appareil d'inclinaison de guide-fil (12) encerclant la cloche d'aspiration (11), ledit appareil d'inclinaison de guide-fil (12) étant capable de coulisser sur l'agencement tubulaire coudé (10) et d'établir un contact glissant transitoire avec le crochet de guide-fil (5) du métier à filer à anneau (1) au cours du prélèvement de la queue du fil (3) lors d'une opération de rattachage, en donnant lieu ainsi au déplacement pivotant dudit crochet de guide-fil (5) dans le sens opposé à une position de départ,
    ledit agencement tubulaire coudé (10) et ledit appareil d'inclinaison de guide-fil (12) connexe pouvant être déplacés verticalement en haut dans le chemin du fil de sorte que le crochet de guide-fil (5) retombe dans la position de départ en insérant ce faisant le fil (3) dans l'oeillet de la boucle du crochet de guide-fil ; et ledit agencement tubulaire coudé (10) portant le fil étant capable de se déplacer davantage vers le haut en permettant ainsi l'opération de rattachage automatique.
  2. Ensemble de rattachage automatique du fil selon la revendication 1, ledit appareil d'inclinaison du guide-fil (12) possédant une partie supérieure et une partie inférieure, la partie supérieure et la partie inférieure étant connectées et positionnées le long d'un axe commun.
  3. Ensemble de rattachage automatique du fil selon la revendication 2, ladite partie supérieure ayant une structure tubulaire.
  4. Ensemble de rattachage automatique du fil selon la revendication 2, la configuration de ladite partie inférieure présentant un tronc solide creux présentant une surface externe inclinée.
  5. Ensemble de rattachage automatique du fil selon la revendication 1, comprenant en outre un module de commande accouplé à une pluralité de capteurs et de butées pour assurer la régulation précise du mouvement du module de prélèvement du fil (9).
  6. Ensemble de rattachage automatique du fil selon la revendication 1, la cloche d'aspiration (11) étant positionnée autour de la bobine (7) à une distance comprise dans la plage allant de 5 mm à 15 mm pour prélever la queue de fil (3).
  7. Ensemble de rattachage automatique du fil selon la revendication 1, ledit appareil d'inclinaison du guide-fil (12) étant capable de coulisser au-dessus de la cloche d'aspiration (11) sur l'agencement tubulaire (10) jusqu'à 60 mm pour permettre à la cloche d'aspiration (11) de prélever la queue de fil (3) depuis la position de longueur de course supérieure de la bobine (7).
  8. Ensemble de rattachage automatique du fil selon la revendication 1, la cloche d'aspiration (11) étant configurée pour prélever la queue de fil (3) de la bobine (7) au bas de la longueur de course.
  9. Procédé de rattachage d'une queue de fil (3) par un ensemble de rattachage automatique du fil (8) dans un métier à filer à anneau (1) selon une quelconque des revendications 1 à 8, le procédé comprenant les étapes suivantes :
    déplacement d'une cloche d'aspiration (11) d'un agencement tubulaire coudé (10) et du module connexe de prélèvement du fil (9) vers le chemin du fil en transmettant un mouvement horizontal et vertical au module de prélèvement du fil (9) et un mouvement vertical à l'agencement tubulaire coudé (10) de sorte qu'un appareil d'inclinaison du guide-fil (12) vienne heurter un crochet de guide-fil pivotant (5) du métier à filer à anneau, en donnant lieu à l'éloignement pivotant dudit crochet de guide-fil (5) d'une position de départ, ledit appareil d'inclinaison du guide-fil (12) étant en mesure de coulisser au-dessus de l'agencement tubulaire coudé (10) ;
    prélèvement de la queue de fil (3) dans une bobine (7) par une traction d'aspiration dans un pavillon ouvert de la cloche d'aspiration (11) dans l'agencement tubulaire coudé (10), la queue de fil (3) étant prélevée sur la bobine (7) en un point quelconque de la longueur de course du bas en haut ;
    déplacement dudit agencement tubulaire coudé (10) et de l'appareil d'inclinaison de guide-fil (12) connexe verticalement dans le chemin du fil de sorte que le crochet de guide-fil (5) retombe dans la position de départ, en insérant ainsi le fil (3) dans l'oeillet de la boucle du crochet de guide-fil ; et
    déplacement encore plus haut de l'agencement tubulaire coudé (10) portant le fil (3) afin de permettre l'opération de rattachage automatique dans le métier à filer à anneau (1).
EP20177969.1A 2019-06-06 2020-06-03 Métier à filer à anneau comprenant un ensemble de rattachage automatique de fil et un appareil d'inclinaison de guide-fil Active EP3748054B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN201941022424 2019-06-06

Publications (2)

Publication Number Publication Date
EP3748054A1 EP3748054A1 (fr) 2020-12-09
EP3748054B1 true EP3748054B1 (fr) 2023-02-22

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EP20177969.1A Active EP3748054B1 (fr) 2019-06-06 2020-06-03 Métier à filer à anneau comprenant un ensemble de rattachage automatique de fil et un appareil d'inclinaison de guide-fil

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EP (1) EP3748054B1 (fr)
CN (1) CN112048793B (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728852A (en) * 1971-06-03 1973-04-24 Maremont Corp Servicing assembly for automatic yarn piecing apparatus
US3868813A (en) * 1973-02-01 1975-03-04 Heberlein Hispano Sa Device for winding-off yarn ends
DE3013174A1 (de) * 1980-04-03 1981-10-15 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Vorrichtung zum pneumatischen abloesen und ansaugen des gebrochenen fadenendes
IT1227728B (it) * 1988-12-23 1991-05-06 Savio Spa Procedimento e dispositivo per unire e per riattaccare il filo allo stoppino in un filatoio ad anello
DE4119382A1 (de) * 1991-06-12 1992-12-17 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum suchen eines fadenendes oder aufwerfen eines hilfsfadens an einem kops bzw. an einen kops oder eine leere huelse
JPH07166440A (ja) * 1993-10-20 1995-06-27 Howa Mach Ltd 糸継装置の糸継成功検知装置
IT1299799B1 (it) * 1998-05-27 2000-04-04 Gaudino Spa Off Procedimento di riattacco automatico del filo in formazione in un filatoio e relativo dispositivo.
DE10124270A1 (de) * 2001-05-18 2002-12-05 Volkmann Gmbh Verfahren zum "Wiederinbetriebsetzen einer Zwirneinrichtung nach einem Fadenbruch"
JP4001052B2 (ja) * 2003-05-13 2007-10-31 株式会社豊田自動織機 紡機における玉揚げ時の糸切断方法
JP2009242027A (ja) * 2008-03-28 2009-10-22 Murata Mach Ltd ボビンの口出し装置
ITMI20110978A1 (it) * 2011-05-30 2012-12-01 Savio Macchine Tessili Spa Dispositivo di aspirazione per carrelli di servizio per filatoi open-end
EP3556919B1 (fr) * 2018-04-19 2024-08-21 Lakshmi Machine Works Ltd. Ensemble de rattache avec bras pour systèmes de rattache automatique et procédé associé

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EP3748054A1 (fr) 2020-12-09
CN112048793A (zh) 2020-12-08
CN112048793B (zh) 2023-05-12

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