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EP3556918B1 - Garnhebevorrichtung für eine anspinnvorrichtung und verfahren dafür - Google Patents

Garnhebevorrichtung für eine anspinnvorrichtung und verfahren dafür 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
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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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English (en)
French (fr)
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EP3556918A1 (de
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.)
Lakshmi Machine Works Ltd
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Lakshmi Machine Works Ltd
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Publication date
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Publication of EP3556918A1 publication Critical patent/EP3556918A1/de
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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. Garnhebevorrichtung (102) für eine Garnanspinneinheit (100) in einer Textilringspinnmaschine, umfassend:
    eine Steuereinheit zum Steuern der Art, wie Luft in Richtung eines Kops (110) injiziert wird, eine Grundplatte (104) mit einem ersten Ende und einem zweiten Ende, wobei das erste Ende mit einem Betätigungsmittel (106) verbunden ist, das der Grundplatte (104) eine Arbeitsposition in der Vorwärtsbewegung und eine Ausgangsposition in der Rückwärtsbewegung bereitstellt,
    wobei das zweite Ende ein freies Ende mit einer Öffnung nahe dem freien Ende ist, die konfiguriert ist, um den Kop (110) einer Spindel (112) in Arbeitsposition zu umgeben;
    dadurch gekennzeichnet, dass
    die Plattenbasis (104) ferner umfasst
    ein erstes Strahlelement (108A), ein zweites Strahlelement (108B) und ein drittes Strahlelement (108C), die jeweils mit drei Öffnungen (118B) versehen sind, die konfiguriert sind, um um die Kontur der Öffnung positioniert zu werden, wobei dem ersten, zweiten und dritten Strahlelement (108A, 108B, 108C) Luftstrom zugeführt wird, um Luftstrahlen durch die Vielzahl von Öffnungen (118B) zu spülen, wenn sich die Grundplatte (104) in Arbeitsposition befindet, um das verwirrte Garnende (116) von dem Spinnkop (110) zu lösen und das Garn nach oben zu heben, um das Anspinnen von Garn in der Textilringspinnmaschine zu ermöglichen, und
    wobei sich alle der drei Strahlelemente (108A, 108B, 108C) in gleichem Abstand von dem Kop (110) befinden und alle der drei Strahlelemente (108A, 108B, 108C) mit Luftstrom in unterschiedlichen Sequenzen und unterschiedlichen Zeitintervallen versehen sind.
  2. Garnhebevorrichtung nach Anspruch 1, wobei jedes Strahlelement (108A, 108B, 108C) ein Block ist, der die drei Öffnungen (118B) auf der sich verjüngenden Oberfläche aufweist, wobei die Öffnungen (118B) einen spitzen Winkel in Bezug auf die Vertikale bilden und der Block ein Durchgangsloch (118A) entlang der horizontalen Achse parallel und/oder senkrecht zur Positionslinie der Öffnungen (118B) aufweist, sodass Luft von einer Saugquelle zu dem Durchgangsloch (118A) der Öffnungen (118B) übertragen wird.
  3. Garnhebevorrichtung nach Anspruch 2, wobei der spitze Winkel im Bereich von 15 Grad bis 30 Grad liegt.
  4. Garnhebevorrichtung nach Anspruch 1, wobei die Strahlelemente (108A, 108B, 108C) auf der Kontur der Öffnung der Basisplatte (104) mit einem eingeschlossenen Winkel von 90 Grad zwischen ihnen positioniert sind.
  5. Garnhebevorrichtung nach Anspruch 1, wobei das Betätigungsmittel (106) ein pneumatischer Kolben-Zylinder-Aktuator ist.
  6. Verfahren zum Anheben eines Garns durch eine Anspinneinheit (100) nach einem der Ansprüche 1 bis 5, wobei das Verfahren umfasst:
    Platzieren der drei Strahlelemente (108A, 108B, 108C) um die Kontur der Öffnung der Basisplatte (104), so dass die drei Öffnungen (118B) jedes Strahlelements (108A, 108B, 108C) zu dem Kop (110) der Spindel (112) vorstehen;
    Anlegen und Entlasten der Spindelbremse für eine vorbestimmte Zeit;
    Zuführen von Luftstrom durch die Strahlelemente (108) durch die Öffnungen (118B) in unterschiedlichen Sequenzen und unterschiedlichen Zeitintervallen für eine vorbestimmte Zeit; und
    Lösen des verwirrten Garnendes (116) von dem Kop (110) durch den Luftstrom von den Strahlelementen (108) und Anheben des Garns nach oben, um das Anspinnen des Garns in der Textilringspinnmaschine zu ermöglichen.
  7. Verfahren zum Anheben eines Garns nach Anspruch 6, wobei mindestens zwei Strahlelemente (108A, 108B) anfänglich mit Luftstrom versehen werden und das dritte Strahlelement (108C) nach einem vorbestimmten Zeitintervall mit Luftstrom versehen wird, um das Garn nach oben anzuheben.
  8. Verfahren zum Anheben eines Garns nach Anspruch 6, wobei mindestens ein Strahlelement (108A) anfänglich mit Luftstrom versehen wird und die anderen Strahlelemente (108B, 108C) nach einem vorbestimmten Zeitintervall mit Luftstrom versehen werden, um das Garn nach oben anzuheben.
  9. Verfahren zum Anheben eines Garns nach Anspruch 6, wobei die Strahlelemente (108) in vorbestimmten Zeitintervallen einzeln mit Luftströmen versehen werden, um das Garn nach oben anzuheben.
  10. Verfahren zum Anheben eines Garns nach Anspruch 6, wobei die Strahlelemente (108) mit Luftstrom versehen werden und intermittierend angehalten werden, um das Garn nach oben anzuheben.
  11. Verfahren zum Anheben eines Garns nach Anspruch 6, wobei die Strahlelemente (108) mit Luftstrom versehen werden, wenn die Spindelbremse für eine vorbestimmte Zeit angelegt wird.
  12. Verfahren zum Anheben eines Garns nach Anspruch 6, wobei die Strahlelemente (108) mit Luftstrom versehen werden, wenn die Spindelbremse für eine vorbestimmte Zeit entlastet wird.
EP19168570.0A 2018-04-20 2019-04-11 Garnhebevorrichtung für eine anspinnvorrichtung und verfahren dafür Active EP3556918B1 (de)

Applications Claiming Priority (1)

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IN201841015061 2018-04-20

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EP3556918B1 true EP3556918B1 (de) 2024-09-18

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3981898B1 (de) * 2020-10-12 2024-10-09 Lakshmi Machine Works Ltd. Spindelbremsanordnung für eine anspinneinheit einer ringspinnmaschine
EP4249655A1 (de) * 2022-03-22 2023-09-27 Lakshmi Machine Works Ltd. Verbesserte garnhebeanordnung in einer automatischen anspinneinheit einer ringspinnmaschine

Family Cites Families (17)

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US3504488A (en) * 1968-12-13 1970-04-07 Burlington Industries Inc Splicing device for yarns or the like
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CN110387615B (zh) 2022-08-05
CN110387615A (zh) 2019-10-29
EP3556918A1 (de) 2019-10-23

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