US20140191074A1 - Yarn-feeding assembly for textile machines - Google Patents

Yarn-feeding assembly for textile machines Download PDF

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Publication number
US20140191074A1
US20140191074A1 US14/152,059 US201414152059A US2014191074A1 US 20140191074 A1 US20140191074 A1 US 20140191074A1 US 201414152059 A US201414152059 A US 201414152059A US 2014191074 A1 US2014191074 A1 US 2014191074A1
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US
United States
Prior art keywords
yarn
feeder
drum
feeding assembly
tension
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.)
Abandoned
Application number
US14/152,059
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English (en)
Inventor
Pietro Zenoni
Rosario Castelli
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
Original Assignee
LGL Electronics SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LGL Electronics SpA filed Critical LGL Electronics SpA
Assigned to L.G.L. ELECTRONICS S.P.A. reassignment L.G.L. ELECTRONICS S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CASTELLI, ROSARIO, ZENONI, PIETRO
Publication of US20140191074A1 publication Critical patent/US20140191074A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to a yarn-feeding assembly for textile machine, particularly for circular knitting machines.
  • a general circular knitting machine is designed to receive a plurality of yarns unwinding from respective feeders arranged about it, which feeders draw the yarns from respective reels.
  • the yarn is wound on a rotary drum which is driven by the motor of the textile machine via a belt drive, with a gear ratio which is mechanically determined on the basis of the diameters of the pulleys which form the belt drive (connection in axis).
  • a more sophisticated version of this type of feeder is also known, as shown, e.g., in U.S. Pat. No. 6,145,347, which allows a selection of the yarns to be fed in order to create striped patterns, by so-called “striper” circular knitting machines.
  • the feeder is provided with a plurality of drums, e.g., four drums keyed to the same shaft which, similarly to the previous case, is driven to rotate by the textile machine via a belt drive.
  • Each drum has one of the yarns under processing coupled thereto, and also in this case the drums always rotate along with the machine; however, the yarns are not entirely wound on their respective drums but, with the feeder at rest, they engage their drums only partially, whereby they do not adhere to them.
  • each drum has a lever associated thereto, which may be operated to deviate the yarn in such a way as to engage a larger portion of the respective drum and to adhere to it, so that it is fed to the machine.
  • yarn feeders are provided with respective motors, which drive the drum at a speed proportional to the speed of the downstream textile machine on the basis of a programmable constant of proportionality, thereby replicating the operation in axis electronically.
  • the above feeders operating in axis have the advantage that they always deliver the exact amount of yarn required by the textile machine, but they also have the drawback that the tension of the yarn delivered by the feeder to the textile machine is very variable, because of the fluctuations of tension to which the yarn is subject upstream of the feeder, which circumstance causes anomalies and flaws in the finished garment.
  • the fluctuations of tension to which the yarn is subject upstream of the feeder may be determined by various factors, e.g., the change in diameter of the reel while it progressively empties, deviations in the path of the yarn upstream of the feeder, etc.
  • FIG. 1 diagrammatically shows a yarn-feeding assembly according to the invention
  • FIG. 2 is a perspective view of the yarn-feeding assembly, in a first specific embodiment of the invention
  • FIG. 3 is a front view of the yarn-feeding assembly, in a second specific embodiment of the invention.
  • FIG. 4 is a view in side elevation of the yarn-feeding assembly, in a third embodiment of the invention.
  • FIG. 1 diagrammatically illustrates a yarn-feeding apparatus 10 according to the invention for a textile machine, for instance, a circular knitting machine 12 . All the specific embodiments shown in FIGS. 2 to 4 and disclosed in more detail below are covered by the embodiment of FIG. 1 which, therefore, finds general application.
  • Yarn-feeding assembly 10 comprises a first feeder 14 , which is provided with a rotary drum 16 having a plurality of yarn Y loops coming from a reel 18 wound thereon.
  • Drum 16 of first feeder 14 is driven to rotate by a motor 20 , which is electronically connected, e.g., via a CAN-bus line 21 , to the motor of the downstream textile machine, for rotating at a speed proportional to the yarn-drawing speed of the textile machine, according to a programmable constant of proportionality, thereby replicating an operation in axis by electronic means.
  • a second feeder 22 is arranged upstream of first feeder 14 , which draws yarn Y from reel 18 and delivers it to first feeder 14 with a delivery action which is modulated by a control loop 24 which is programmed to stabilize the tension of the yarn unwinding from the second feeder on a predetermined level, on the basis of a signal received from a tension sensor 26 which is operatively coupled to the yarn. Since, as known, the tension of the yarn upstream of first feeder 14 reflects the tension of the yarn downstream of it, the tension of the yarn delivered by first feeder 14 to machine 12 will be substantially stable and equal to the desired value, although first feeder 14 operates in axis with machine 12 and, therefore, it does not provide any control on the yarn tension.
  • Tension sensor 26 is preferably arranged between first feeder 14 and second feeder 22 .
  • the yarn-feeding assembly allows both the amount of yarn fed to the textile machine (which is proportional to the number of revolutions of first feeder 14 ) and the yarn-feeding tension, which is stabilized by second feeder 22 before the yarn is delivered to first feeder 14 , to be controlled.
  • the two feeders 114 and 122 of the yarn-feeding assembly are provided with respective rotary drums 116 , 128 , which are supported side-by-side and with parallel axes by a single housing 130 and are driven to rotate by respective motors (not shown) housed within housing 130 .
  • Tension sensor 126 is mounted to housing 130 between drums 116 , 128 .
  • the feeders both have the yarn wound between their drums 116 , 128 and respective rods 117 , 129 slanting towards the axis of the drums, in order to maintain the yarn loops separated from each other in the axial direction.
  • the motor of first feeder 114 is electronically connected in axis to the motor of the textile machine, as shown in FIG. 1 , in such a way as to rotate at a speed proportional to the yarn-drawing speed of the textile machine.
  • control loop modulates the speed of rotation of drum 128 on the basis of the signal received by tension sensor 126 , in such a way as to maintain the tension of the delivered yarn (which depends on the difference between the speed at which the yarn is drawn by first feeder 114 and the speed at which the yarn is delivered by second feeder 122 ) substantially constant on the desired level.
  • the electronics which controls feeders 114 , 122 can be integrated in a single circuit (not shown) received within housing 130 .
  • FIG. 3 illustrates another specific embodiment of the invention, which differs from the previous one in that the two feeders 214 , 222 do not form a single body and do not share the same control circuit, but they are separated and provided with respective control circuits (not shown).
  • tension sensor 226 is mounted to second feeder 222 .
  • first feeder 314 is similar to the first feeder of the previous embodiment, i.e., it is provided with a rotary drum 314 driven by a motor (not shown) which is electronically connected in axis to the motor of the downstream textile machine.
  • the second feeder is a so-called storage feeder 322 of a conventional type.
  • Storage feeder 322 comprises a stationary drum 328 on which a motorized, swivel flywheel 322 winds a plurality of yarn loops forming a stock S.
  • Feeder 322 is provided with braking means 334 (which are only diagrammatically shown in FIG. 4 ) which apply a controlled braking action upon the delivered yarn.
  • braking means 334 conventionally comprise a hollow, frustoconical braking member 336 , which is biased by driving means 340 to abut with its inner surface against the delivery edge 328 a of drum 328 .
  • the control loop (not shown in FIG.
  • the braking means acting upon the yarn may differ from those illustrated, and they could also be separated from the feeder; e.g., a plate-based brake, in which the yarn is pressed between a stationary plate and a movable plate connected to an actuator, may be used, as well as other conventional brakes.
  • the tension sensor could also be separated from the second feeder, rather than incorporated in it.
  • the constant of proportionality which links the speed of rotation of the drum of the first feeder to the yarn-drawing speed of the textile machine could also be adjusted during processing, e.g., by signals sent from the textile machine to the feeder, which change the constant of proportionality, e.g., as a function of the pattern to be obtained.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Knitting Machines (AREA)
  • Looms (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US14/152,059 2013-01-10 2014-01-10 Yarn-feeding assembly for textile machines Abandoned US20140191074A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000017A ITTO20130017A1 (it) 2013-01-10 2013-01-10 Gruppo di alimentazione di filato per macchine tessili.
ITTO2013A000017 2013-01-10

Publications (1)

Publication Number Publication Date
US20140191074A1 true US20140191074A1 (en) 2014-07-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US14/152,059 Abandoned US20140191074A1 (en) 2013-01-10 2014-01-10 Yarn-feeding assembly for textile machines

Country Status (4)

Country Link
US (1) US20140191074A1 (zh)
EP (1) EP2754742B1 (zh)
CN (1) CN103924371B (zh)
IT (1) ITTO20130017A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112209180A (zh) * 2019-07-11 2021-01-12 爱吉尔电子股份公司 将多根纱线通过积极式纱线馈送器馈送到纺织机的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106350930B (zh) * 2016-11-30 2018-02-02 广西大学 一种针织机恒张力输纱装置
IT201700086095A1 (it) * 2017-07-27 2019-01-27 Btsr Int Spa Metodo e sistema per alimentare un cavo metallico ritorto ed intrecciato o un filo piatto da un relativo supporto senza modificare struttura o conformazione del filo
IT201900011451A1 (it) * 2019-07-11 2021-01-11 Lgl Electronics Spa Metodo per l'alimentazione a tensione controllata di una pluralita' di filati ad una macchina tessile

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6105398A (en) * 1998-03-26 2000-08-22 Memminger-Iro Gmbh Positive feed mechanism for elastic yarns
US6322016B1 (en) * 1997-02-24 2001-11-27 Iro Ab Thread delivery device and thread brake
US7218988B2 (en) * 2003-10-17 2007-05-15 Shima Seiki Manufacturing Limited Yarn feeding apparatus of weft knitting machine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3567142A (en) * 1966-05-17 1971-03-02 Inst Textile De France Device for adjusting the tension of yarn fed to a yarn comsuming machine
DE2245869A1 (de) * 1972-09-19 1974-03-28 Karl Bous Verfahren und vorrichtung zum liefern und spannen von garnen mit einstellbarer, konstant bleibender fadenspannung
DE3437251A1 (de) * 1984-10-11 1986-04-24 Gustav 7290 Freudenstadt Memminger Fadenbremse, insbesondere fuer textilmaschinen
DE19546404A1 (de) * 1995-12-12 1997-06-19 Terrot Strickmaschinen Gmbh Fadenliefervorrichtung
DE19712739A1 (de) 1997-03-26 1998-10-01 Sipra Patent Beteiligung Fadenliefereinrichtung für intermittierenden Fadenverbrauch
ITMI20020770A1 (it) * 2002-04-10 2003-10-10 Tiziano Barea Dispositivo e metodo per alimentare un filo elastomerico ad una macchina tessile al fine di avere un manufatto di qualita' costante in ogni
ITMI20060311A1 (it) * 2006-02-21 2007-08-22 Btsr Int Spa Dispositivo perfezionato di alimentazione di filo o filatio ad una macchina tessile e metodo per attuare tale alimentazione
EP2169099A1 (en) * 2008-09-25 2010-03-31 L.G.L. Electronics S.p.A. Negative yarn feeder with weft-braking device
EP2186932B1 (en) * 2008-11-13 2012-09-19 L.G.L. Electronics S.p.A. Yarn-feeding apparatus for textile machines, with control of the feeding parameters
ITMI20100887A1 (it) * 2010-05-18 2011-11-19 Btsr Int Spa Metodo e dispositivo perfezionato per alimentare un filo ad una macchina operatrice con tensione e velocita' costante

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6322016B1 (en) * 1997-02-24 2001-11-27 Iro Ab Thread delivery device and thread brake
US6105398A (en) * 1998-03-26 2000-08-22 Memminger-Iro Gmbh Positive feed mechanism for elastic yarns
US7218988B2 (en) * 2003-10-17 2007-05-15 Shima Seiki Manufacturing Limited Yarn feeding apparatus of weft knitting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112209180A (zh) * 2019-07-11 2021-01-12 爱吉尔电子股份公司 将多根纱线通过积极式纱线馈送器馈送到纺织机的方法

Also Published As

Publication number Publication date
EP2754742A1 (en) 2014-07-16
CN103924371B (zh) 2017-04-26
ITTO20130017A1 (it) 2014-07-11
EP2754742B1 (en) 2015-12-09
CN103924371A (zh) 2014-07-16

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AS Assignment

Owner name: L.G.L. ELECTRONICS S.P.A., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZENONI, PIETRO;CASTELLI, ROSARIO;REEL/FRAME:031937/0666

Effective date: 20131120

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION