EP3269857A1 - Verfahren zur steuerung des abspulens von garn von einer schussfadenzufuhrvorrichtung - Google Patents

Verfahren zur steuerung des abspulens von garn von einer schussfadenzufuhrvorrichtung Download PDF

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Publication number
EP3269857A1
EP3269857A1 EP17178574.4A EP17178574A EP3269857A1 EP 3269857 A1 EP3269857 A1 EP 3269857A1 EP 17178574 A EP17178574 A EP 17178574A EP 3269857 A1 EP3269857 A1 EP 3269857A1
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EP
European Patent Office
Prior art keywords
yarn
machine
npsd
operating position
unwinding
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.)
Granted
Application number
EP17178574.4A
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English (en)
French (fr)
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EP3269857B1 (de
Inventor
Luca Gotti
Pietro Zenoni
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.)
LGL Electronics SpA
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LGL Electronics SpA
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Publication date
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Publication of EP3269857A1 publication Critical patent/EP3269857A1/de
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Publication of EP3269857B1 publication Critical patent/EP3269857B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • D04B35/14—Indicating, warning, or safety devices, e.g. stop motions responsive to thread breakage
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed

Definitions

  • An "accumulator" yarn feeder can generically comprise a drum onto which winding means wind a plurality of yarn turns which form a reserve.
  • Such winding means can consist of a motorized flywheel that winds the yarn on the drum, or the drum itself can be rotated in order to wind the yarn onto it.
  • the yarn is taken from a distaff upstream and passed on to the textile machine downstream on request from the latter.
  • Accumulator weft feeders make it possible to maintain the amount of reserve wound on the drum substantially constant, independently of the yarn drawing rate by the downstream machine, while at the same time controlling the output yarn tension.
  • the feeder makes use of various sensors connected to a control unit.
  • One such sensor in particular, generates at least one pulse for each turn executed and can be optical, piezoelectric, or the like.
  • the control unit orders the machine to stop so as to prevent defects in the finished garment, or the complete separation of the hose of the garment being made.
  • such yarn breakage sensors can be mechanical or electronic.
  • Electronic sensors have the advantage that they perform better in terms of response time and in operation they do not interfere with the yarn tension during unwinding, in that they detect the movement of the weft by way of a photoelectric sensor.
  • Such electronic sensors are relatively expensive and require the installation and wiring of an additional power supply and communication circuit, with further increase of the costs and of the complexity of the detection assembly.
  • EP2270269B1 of this same Applicant describes a method of detecting the stoppage of the yarn unwinding from an accumulation weft feeder, which overcomes the drawbacks of the systems that use yarn breakage sensors like the ones mentioned above.
  • a threshold interval is continuously calculated which corresponds to the maximum time interval between two successive pulses beyond which it must be assumed that an accidental stoppage of the weft has occurred.
  • Such threshold interval is updated in real time as a function of the yarn pickup speed. Therefore, the delay since the last pulse received is measured continuously and is compared with the updated threshold interval, so as to stop the machine if the measured delay exceeds the updated threshold interval.
  • the main aim of the present invention is to provide a method for controlling the unwinding of yarn from a weft feeder that, while retaining the advantages of the known system described in EP2270269B1 , does not require an initial calibration step and does not require the presence of a speed signal of the downstream machine, and further is capable of adapting automatically to the actual consumption of yarn of the various feeder devices involved in the textile process.
  • an unwinding sensor 18 typically an optical sensor, generates an unwinding pulse UWP for each turn or fraction of a turn of yarn unwound from the drum.
  • a weft braking device 20 Downstream of the weft feeder 10 is a weft braking device 20, which is controlled by a control unit CU.
  • the control unit CU is programmed to stabilize the yarn tension during unwinding from the drum 12 by retroactively controlling the weft braking device 20 on the basis of the signal generated by a tension sensor 22 associated with the yarn being unwound.
  • the position pulses MPP can be generated by the controller of the machine 16 or obtained directly from the signals of an encoder which, usually, is associated with the machine.
  • the apparatus described above adopts a method that, according to the invention, comprises the following steps:
  • control unit CU On the basis of the impulse signals received from the unwinding sensor 18 and from the machine 16.
  • the programming of the control unit comes under the normal knowledge of the person skilled in the art and therefore will not be described further.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP17178574.4A 2016-07-15 2017-06-29 Verfahren zur steuerung des abspulens von garn von einer schussfadenzufuhrvorrichtung Active EP3269857B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000074062A IT201600074062A1 (it) 2016-07-15 2016-07-15 Metodo per il controllo dello svolgimento di filato da un alimentatore di trama

Publications (2)

Publication Number Publication Date
EP3269857A1 true EP3269857A1 (de) 2018-01-17
EP3269857B1 EP3269857B1 (de) 2019-03-20

Family

ID=57796826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17178574.4A Active EP3269857B1 (de) 2016-07-15 2017-06-29 Verfahren zur steuerung des abspulens von garn von einer schussfadenzufuhrvorrichtung

Country Status (4)

Country Link
EP (1) EP3269857B1 (de)
CN (1) CN107620154B (de)
IT (1) IT201600074062A1 (de)
TR (1) TR201908173T4 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019104681B3 (de) 2019-02-25 2020-04-23 Memminger-IRO Gesellschaft mit beschränkter Haftung Verfahren und System mit Fadenliefergeräten zur Überwachung der Produktion einer Strickmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0176987A1 (de) * 1984-09-27 1986-04-09 Aktiebolaget Iro Verfahren zum Steuern einer Garnspeicher-, Zuführ- und Messvorrichtung
JPH1181090A (ja) * 1997-06-16 1999-03-26 Tsudakoma Corp 緯糸処理装置
EP2270269B1 (de) 2009-07-03 2011-10-26 L.G.L. Electronics S.p.A. Verfahren zur Erkennung des Anhaltens der Garnabwicklung von einer Garnzufuhr mit stationärer Trommel
EP2415916A1 (de) * 2010-08-04 2012-02-08 L.G.L. Electronics S.p.A. Verfahren und Vorrichtung zur Erkennung unbeabsichtigten Anhaltens des Garns auf einer Strickzeile
EP2857567A1 (de) 2013-10-02 2015-04-08 Memminger-IRO GmbH Verfahren und Vorrichtung zur Überwachung der Produktion einer Strickmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202175799U (zh) * 2011-08-02 2012-03-28 宁波慈星股份有限公司 电脑针织横机操作杆打孔压销装置
JP2016050053A (ja) * 2014-08-28 2016-04-11 村田機械株式会社 糸巻取装置
JP2016108086A (ja) * 2014-12-05 2016-06-20 村田機械株式会社 糸巻取機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0176987A1 (de) * 1984-09-27 1986-04-09 Aktiebolaget Iro Verfahren zum Steuern einer Garnspeicher-, Zuführ- und Messvorrichtung
JPH1181090A (ja) * 1997-06-16 1999-03-26 Tsudakoma Corp 緯糸処理装置
EP2270269B1 (de) 2009-07-03 2011-10-26 L.G.L. Electronics S.p.A. Verfahren zur Erkennung des Anhaltens der Garnabwicklung von einer Garnzufuhr mit stationärer Trommel
EP2415916A1 (de) * 2010-08-04 2012-02-08 L.G.L. Electronics S.p.A. Verfahren und Vorrichtung zur Erkennung unbeabsichtigten Anhaltens des Garns auf einer Strickzeile
EP2857567A1 (de) 2013-10-02 2015-04-08 Memminger-IRO GmbH Verfahren und Vorrichtung zur Überwachung der Produktion einer Strickmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019104681B3 (de) 2019-02-25 2020-04-23 Memminger-IRO Gesellschaft mit beschränkter Haftung Verfahren und System mit Fadenliefergeräten zur Überwachung der Produktion einer Strickmaschine
EP3699343A1 (de) 2019-02-25 2020-08-26 Memminger-IRO GmbH Verfahren und system zur überwachung der produktion einer strickmaschine mit mehreren fadenliefergeräten

Also Published As

Publication number Publication date
CN107620154B (zh) 2020-07-14
EP3269857B1 (de) 2019-03-20
IT201600074062A1 (it) 2018-01-15
TR201908173T4 (tr) 2019-06-21
CN107620154A (zh) 2018-01-23

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