EP3763650A1 - Verfahren zum zuführen mehrerer fäden zu einer textilmaschine über jeweils positive fadenzufürvorrichtungen - Google Patents

Verfahren zum zuführen mehrerer fäden zu einer textilmaschine über jeweils positive fadenzufürvorrichtungen Download PDF

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Publication number
EP3763650A1
EP3763650A1 EP20180924.1A EP20180924A EP3763650A1 EP 3763650 A1 EP3763650 A1 EP 3763650A1 EP 20180924 A EP20180924 A EP 20180924A EP 3763650 A1 EP3763650 A1 EP 3763650A1
Authority
EP
European Patent Office
Prior art keywords
textile machine
yarn
tension
signal
position signal
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
EP20180924.1A
Other languages
English (en)
French (fr)
Other versions
EP3763650B1 (de
Inventor
Mirko Ruggeri
Giovanni Pedrini
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 of EP3763650A1 publication Critical patent/EP3763650A1/de
Application granted granted Critical
Publication of EP3763650B1 publication Critical patent/EP3763650B1/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
    • B65H51/00—Forwarding filamentary material
    • B65H51/30—Devices controlling the forwarding speed to synchronise with supply, treatment, or take-up apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40—Applications of tension indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/385—Regulating winding speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/388—Regulating forwarding speed
    • 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 a method for feeding a plurality of yarns to a textile machine by way of respective positive yarn feeders.
  • This type of feeder is provided with a motorized reel, on which the yarn is repeatedly wound (e.g., 3 or 4 windings).
  • the yarn is unwound from a spool and is fed to a textile machine downstream, e.g., a knitting machine or a warping machine.
  • the yarn tension in output from the feeder is monitored continuously by a tension sensor which is connected to a control unit.
  • This control unit modulates the speed of the reel on the basis of the signal received from the tension sensor, so as to maintain the tension of the yarn fed to the textile machine substantially constant at a desired level, to the advantage of the quality of the garment.
  • the feeder might start too early, or start rotating too rapidly, faster than required, thus leading to the above mentioned instabilities.
  • EP 1901984 B1 proposes using two tension sensors for each yarn, one of which is arranged at the exit of the feeder while the other is arranged at the entry of the textile machine.
  • the control unit based on an adapted algorithm, controls the feeder by taking account of the tension values measured by both sensors, so as to limit the risk of instabilities arising.
  • a drawback of the system described in EP 1901984 B1 is its high cost, in that it envisages using two tension sensors for each yarn.
  • the aim of the present invention is to provide a method for feeding a plurality of yarns to a textile machine by way of respective positive yarn feeders, which makes it possible to control the tension with precision, keeping it constant even in the event of variations in the operating conditions deriving from factors like the ones cited above, but using a single tension sensor which is positioned proximate to the textile machine, so as to reduce costs.
  • Figure 1 is a schematic diagram of a feeding apparatus that uses the method according to the invention.
  • a yarn feeding apparatus 10 comprises a yarn feeder 12 of the "positive" type.
  • the feeder 12 is provided with a motorized reel 14, on which the yarn F is repeatedly wound (e.g., 3 or 4 windings).
  • the yarn F is unwound from a spool 16 and is fed to a textile machine downstream, e.g., a warping machine (not shown in full) which is provided with a yarn winding drum 18.
  • a control unit CU modulates the speed of the reel 14 by way of a first control loop CL1 on the basis of a reference position signal PS_ref.
  • an encoder 22 which is connected to the motor 24 of the feeder 12, generates a real position signal PS_real.
  • the real position signal PS_real is compared with the reference position signal PS_ref in a first subtracter node N1.
  • the position error PS_err deriving from the comparison is sent to a position controller PC which, by way of an inverter I, drives the motor 24 in feedback.
  • the feeder 12 is programmed to actuate the reel 14 with the warping machine 18 according to a given transmission ratio (known as "operation according to an electrical axis").
  • the reference position signal PS_ref is generated by a second control loop CL2 which uses a position signal of the textile machine MP to maintain the aforementioned transmission ratio between the reel 14 and the warping machine 18.
  • the position signal of the textile machine MP is generated by a synchronization device, e.g., an encoder 26, which is keyed on the yarn winding drum 18.
  • a synchronization device e.g., an encoder 26, which is keyed on the yarn winding drum 18.
  • the position signal of the textile machine MP is sent to a module TRM, which generates the reference position signal PS_ref.
  • the module TRM is integrated in the control unit CU.
  • the transmission ratio is automatically corrected by a third control loop CL3 on the basis of a measured tension signal T_meas generated by a tension sensor 28 which is associated with the yarn F, so as to compensate the slow variations in tension deriving from factors such as:
  • the tension sensor 28 is advantageously arranged directly upstream of the warping machine 18, downstream of any transmission elements such as pulleys and yarn guide rings, which are schematically indicated by the rectangle 30 in Figure 1 , which can alter the real value of the tension with which the yarn enters the warping machine.
  • a reference tension signal T_ref which is configurable by the user, is compared with the measured tension signal T_meas in a second subtracter node N2, and the tension error T_err deriving from the comparison is sent to a tension controller TC.
  • the tension controller TC generates as a consequence a signal for correcting the transmission ratio TRC and sends it to the module TRM, which is programmed to generate the reference position signal PS_ref on the basis of the transmission ratio that was set which, as mentioned, is progressively corrected automatically.
  • the third control loop CL3 can operate at a relatively low sampling frequency, e.g., a few Hz, so as to be insensitive to sudden variations in tension deriving from accidental factors.
  • the method according to the invention fully achieves the set aim and objects in that, although it uses a single tension sensor which is positioned proximate to the textile machine, makes it possible to control the tension with precision, keeping it constant even in the event of any variations in the operating conditions deriving from factors like the ones cited previously.
  • a different synchronization device can be used, e.g., a proximity sensor.
  • the transmission ratio is set in the control unit, it may also be set directly on the feeder.

Landscapes

  • Tension Adjustment In Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP20180924.1A 2019-07-11 2020-06-18 Verfahren zum zuführen mehrerer fäden zu einer textilmaschine über jeweils positive fadenzufürvorrichtungen Active EP3763650B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000011448A IT201900011448A1 (it) 2019-07-11 2019-07-11 Metodo per l'alimentazione di una pluralita' di filati ad una macchina tessile mediante rispettivi alimentatori di filato positivi

Publications (2)

Publication Number Publication Date
EP3763650A1 true EP3763650A1 (de) 2021-01-13
EP3763650B1 EP3763650B1 (de) 2022-03-09

Family

ID=68582144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20180924.1A Active EP3763650B1 (de) 2019-07-11 2020-06-18 Verfahren zum zuführen mehrerer fäden zu einer textilmaschine über jeweils positive fadenzufürvorrichtungen

Country Status (4)

Country Link
EP (1) EP3763650B1 (de)
CN (1) CN112209180B (de)
ES (1) ES2912727T3 (de)
IT (1) IT201900011448A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100017966A1 (it) * 2021-07-08 2023-01-08 Lgl Electronics Spa Alimentatore di filato positivo motorizzato con modalità operativa selezionabile, ed apparato di alimentazione di filato utilizzante lo stesso.
IT202200007784A1 (it) * 2022-04-20 2023-10-20 Lgl Electronics Spa Metodo per l'alimentazione di una pluralità di filati ad un orditoio ed apparato per l'esecuzione di tale metodo

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6328081B1 (en) * 1999-11-30 2001-12-11 L.G.L. Electronics S.P.A. Weft tension brake control
EP1901984B1 (de) 2005-07-12 2010-09-22 B.T.S.R. International S.p.A. Doppelregelschleifenverfahren und -vorrichtung zur gewährleistung einer fadenzuführung unter konstanter spannung zu einer textilmaschine
EP2754742A1 (de) * 2013-01-10 2014-07-16 L.G.L. Electronics S.p.A. Garnzufuhranordnung für Textilmaschinen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20020945A1 (it) * 2002-05-03 2003-11-03 Tiziano Barea Metodo e dispositivo per l'alimentazione ed il recupero a tensione costante di un filato alimentato ad una macchina tessile
DE50305700D1 (de) * 2003-10-04 2006-12-28 Ssm Ag Verfahren und Vorrichtung zur Regelung der Fadenspannung auf einer Textilmaschine, sowie Anwendung des Verfahrens
ES2402743T3 (es) * 2008-01-17 2013-05-08 B.T.S.R. International S.P.A. Sistema para controlar la alimentación de una máquina con un hilo o alambre y procedimiento correspondiente
EP2186932B1 (de) * 2008-11-13 2012-09-19 L.G.L. Electronics S.p.A. Fadenliefervorrichtung für Textilmaschinen mit Steuerung der Zuführungsparameter
ITTO20110840A1 (it) * 2011-09-20 2013-03-21 Lgl Electronics Spa Metodo di taratura di alimentatori di filato a tensione controllata su linee di tessitura.
EP3103749B1 (de) * 2015-06-12 2019-12-04 L.G.L. Electronics S.p.A. Verfahren zur steuerung der abnutzungsrate eines garns, der von einem anhäufungszuführer an eine textilmaschine abgewickelt wird, und vorrichtung zur ausführung eines solchen verfahrens
BE1023220B1 (nl) * 2015-07-03 2017-01-03 Nv Michel Van De Wiele Aanvoerinrichting voor aanvoeren van garens, werkwijze voor het bepalen van de spanning van garens en gebruik van controlemiddelen voor het aansturen van actuatoren voor het aanvoeren van garens
ITUA20163183A1 (it) * 2016-05-05 2017-11-05 Btsr Int Spa Metodo per il monitoraggio e controllo dell’alimentazione di un filo ad un macchina tessile e relativo dispositivo di alimentazione.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6328081B1 (en) * 1999-11-30 2001-12-11 L.G.L. Electronics S.P.A. Weft tension brake control
EP1901984B1 (de) 2005-07-12 2010-09-22 B.T.S.R. International S.p.A. Doppelregelschleifenverfahren und -vorrichtung zur gewährleistung einer fadenzuführung unter konstanter spannung zu einer textilmaschine
EP2754742A1 (de) * 2013-01-10 2014-07-16 L.G.L. Electronics S.p.A. Garnzufuhranordnung für Textilmaschinen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100017966A1 (it) * 2021-07-08 2023-01-08 Lgl Electronics Spa Alimentatore di filato positivo motorizzato con modalità operativa selezionabile, ed apparato di alimentazione di filato utilizzante lo stesso.
EP4116476A1 (de) * 2021-07-08 2023-01-11 L.G.L. Electronics S.p.A. Motorisierter positiver fadenzuführer mit wählbarem betriebsmodus und fadenzuführungsvorrichtung damit
IT202200007784A1 (it) * 2022-04-20 2023-10-20 Lgl Electronics Spa Metodo per l'alimentazione di una pluralità di filati ad un orditoio ed apparato per l'esecuzione di tale metodo
EP4265831A1 (de) * 2022-04-20 2023-10-25 L.G.L. Electronics S.p.A. Verfahren zum zuführen einer vielzahl von fäden zu einer schärmaschine und vorrichtung zur durchführung des verfahrens

Also Published As

Publication number Publication date
EP3763650B1 (de) 2022-03-09
ES2912727T3 (es) 2022-05-27
IT201900011448A1 (it) 2021-01-11
CN112209180A (zh) 2021-01-12
CN112209180B (zh) 2023-08-22

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