EP0499380B1 - Fadenverarbeitungsmaschine - Google Patents

Fadenverarbeitungsmaschine Download PDF

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Publication number
EP0499380B1
EP0499380B1 EP19920300679 EP92300679A EP0499380B1 EP 0499380 B1 EP0499380 B1 EP 0499380B1 EP 19920300679 EP19920300679 EP 19920300679 EP 92300679 A EP92300679 A EP 92300679A EP 0499380 B1 EP0499380 B1 EP 0499380B1
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EP
European Patent Office
Prior art keywords
yarn
elastomeric
supply
elastomeric yarn
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.)
Expired - Lifetime
Application number
EP19920300679
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English (en)
French (fr)
Other versions
EP0499380A1 (de
Inventor
David Graham Pickett
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.)
Jones Stroud and Co Ltd
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Jones Stroud and Co Ltd
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Filing date
Publication date
Application filed by Jones Stroud and Co Ltd filed Critical Jones Stroud and Co Ltd
Publication of EP0499380A1 publication Critical patent/EP0499380A1/de
Application granted granted Critical
Publication of EP0499380B1 publication Critical patent/EP0499380B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
    • 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
    • B65H2701/319—Elastic threads

Definitions

  • This invention relates to a yarn processing apparatus according to the preamble of claim 1.
  • Such an apparatus is known from EP-A-0 400 838.
  • An elastomeric yarn alone is difficult or impossible to use in conventional knitting or weaving machinery. However, when combined with a relatively inelastic yarn to form a composite yarn, it can be knitted or woven into a fabric having good elastic properties.
  • An elastomeric yarn may consist typically of a long chain polymer having a high percentage content of segmented polyurethane. Such yarns are variously known as Spandex, or Elastane or may be of the type known as LYCRA (registered trade mark).
  • the relatively inelastic reinforcing yarn may comprise a nylon (polyamide) or polyester yarn.
  • Elastomeric yarn in textile fabric produces a fabric with a wide range of total extension and resistance to stretch with complete recovery.
  • Elastomeric threads of the kind referred to are characterised by a total extension of around 700% with complete recovery. Such threads have to be anchored in the fabric in such a way that they are normally extended to about 50% of their maximum extension when the fabric is at rest. The elastomeric threads then exert a high level of resistance to stretching of the fabric, thus providing support and/or improved fit of a garment made from the fabric.
  • the elastomeric yarn has a very high total extension and a low modulus of elasticity (ratio of stress to strain during extension) making it difficult to combine with conventional, relatively inelastic textile yarns.
  • a method which has hitherto been widely used is to wrap the elastomeric yarn while extended to about 50-60% of its total extension with an inelastic yarn such as nylon, under accurately controlled conditions which maintain the extension of the elastomeric yarn within very narrow limits.
  • the composite yarn can then be fed into a knitting or weaving machine through conventional tensioning devices which maintain the inelastic yarn at full extension. This in turn maintains the extension of the elastomeric yarn within the narrow limits achieved in the wrapping process.
  • US-A-3281087 describes a tensioning arrangement for core spun elastomeric yarn which is drawn from a reel through powered draw off rollers, the speed of the draw off rollers being controlled so as to slightly exceed the take-up speed of a winding mandrel onto which the yarn is fed, the arrangement being that no tension can be detected in the core spun yarn between the powered draw off rollers and the mandrel.
  • Elastomeric yarn and an inelastic yarn such as nylon have very different extensometric properties as illustrated in the typical load/extension graph shown in Figure 1.
  • the low modulus of elasticity (stress/strain characteristic) of the elastomeric yarn indicates that very small changes in load cause large changes in extension.
  • the control of tension by the type of device used for nylon and similar inelastic yarns is therefore impossible with elastomeric yarns.
  • a supply package of elastomeric yarn is driven at a fixed speed at the peripheral surface of the yarn package.
  • the elastomeric yarn is unrolled off the side of the supply package so as to retain substantially constant extension.
  • a take-up or receiving package is similarly driven, but at a higher speed, at its peripheral surface. The extension of the yarn is thus governed by the difference in surface or peripheral speeds of the supply and take-up packages by this method.
  • an elastomeric yarn is tensioned using powered draw off rolls which are also used to twist the elastomeric yarn with a less elastic covering yarn.
  • a tensioning device comprising a braked friction roller is interposed between the elastomeric yarn supply package and the draw off rolls.
  • the braking of the braked feed roller is controlled by a spring loaded arm which detects the tension in the thus supplied elastomeric yarn and adjusts the braking force accordingly.
  • this method does not enable precise control of the tensioning because of the very high percentage elongation (up to 700%) to which elastomeric threads may be subjected.
  • the braking of the friction roller takes place in response to the tension of yarn which has already passed over the roller, and there is no intervention in the drive speed of the actual pull off feed rollers.
  • Figure 2 illustrates a known wrapping procedure in which the supply package 3 of elastomeric yarn 1 is peripherally driven at a first speed by contact with a driving roller 4 and is taken up by a take-up package 6 driven in the same manner by a driving roller 7, but at a higher peripheral speed than the supply package.
  • An inelastic nylon wrapping yarn is unrolled from a rotating package 8.
  • the number of turns per unit length of the nylon wrapping yarn 2 about the elastomeric yarn 1 is governed chiefly by the speed of rotation of the package 8 providing the inelastic nylon yarn 2 but is also governed by the speed of rotation of the take-up package 6.
  • speed of rotation of the package 8 providing the inelastic nylon yarn 2
  • speed of rotation of the take-up package 6 There is a clear practical limit to the speed at which a usefully sized package bobbin 8 of nylon 2 can be rotated in order to maintain an acceptable level of wrapping turns.
  • the production output speed of composite yarn 5 by this prior core wrapping method is very low, typically 20-25m per minute.
  • a continuous supply of elastomeric yarn may be made possible for high speed processing such as production of composite yarn.
  • Tensioning apparatus is known, for example from US-A-4953367 for use with circular knitting machines having a number of supply means for yarn.
  • the yarn tension is monitored at each of the supply stations and the tension is compared with a reference value dependent on measured signals from all the measuring circuits.
  • a feedback system controls the speed of a stepper motor driving each individual yarn tensioner in response to the control signal. This enables the yarn to be supplied to a multi-station knitting machine with consistent tension at each of the yarn supply stations.
  • the yarn involved is a normal knitting yarn which is being supplied to apparatus for its final utilisation.
  • the apparatus described in US-A-4953367 is not disclosed for use with elastomeric thread of very high total extension.
  • the present invention was developed to improve the supply rate of elastomeric yarn particularly but not exclusively for the manufacture of composite yarn in the way described in our prior European Patent Application EP-A-0400838.
  • the supply means of the invention can be used for supply of elastomeric yarn to other apparatus for composite yarn manufacture such as for example one in which two yarns are combined by air or other fluid jet intermingling, for example as set out in GB-A-1 487 674 (E. I. Du Pont De Nemours and Company).
  • a yarn processing apparatus for combining a relatively inelastic yarn with an elastomeric yarn having a high total extension and a low modulus of elasticity; the yarn processing apparatus including:-
  • Figure 3 illustrates the present invention applied to a machine for manufacturing composite yarn as set out in EP-A-0 400 838, by way of example only.
  • a supply means for the elastomeric yarn has been provided incorporating a tension device 90 having specific characteristics which make it possible to supply an elastomeric yarn at a very precisely regulated tension.
  • incoming yarn 10 is fed from a supply package 12 or 12' via input guides 94 and 95 onto a motor driven reel 91.
  • the yarn is passed a few times around the reel before passing through a guide eyelet 92 of a pivotally mounted tension control arm 93.
  • the arm 93 is pivoted at 96 against the action of an electric torque motor which acts on the arm 93 by means of a pivoted lever 97 connected at 98 to the torque motor.
  • the reel 91 may be driven by example by a stepper motor and the speed of the motor may be increased if the detected tension in the yarn 10 increases and may be decreased if the detected tension in the yarn 10 decreases.
  • the arm 93 and lever 97 act as a tension detector.
  • the tension desired can be set by means of a potentiometer 99 which adjusts the load of the torque motor acting on the arm 93 through the lever 97.
  • a predetermined tension 10 at the arm guide will give a known delivery rate of the elastomeric yarn 10 to other processing apparatus, in the example illustrated the yarn texturising machine employed to produce a composite yarn by the process described in EP-A-0 400 838.
  • the tension required can be calculated from the graph of Figure 6 based on data previously obtained.
  • the tensioning device 90 thus creates and controls tension in the elastomeric yarn 10 between the tension control arm 93 and for example the drafting rollers 68, 70.
  • the tension is effectively maintained within very narrow limits.
  • the yarn 10 Since the yarn 10 is not extended in the package 12, 12', it can be provided in a relaxed condition and the supply can be taken over end from the package. This enables a plurality of packages 12, 12' to be connected nose to tail.
  • the drawing shows a pair of adjacent packages thus connected.
  • the packages are mutually inclined so as to converge symmetrically towards the guide 94 on the tension device 90.
  • the distance between the packages 12, 12' and central guide 94 is such as to maintain a constant flow in the ballooning yarn as it is fed over end from the stationary package 12, such distance being typically 15cm.
  • the first or running package 12 of elastomeric yarn has a tail of yarn from the lower end tied or otherwise attached to the leading end of yarn 10' from the upper end of the second or reserve package 12'.
  • the yarn 10 is fully drawn off from the first package 12, over end drawing off of yarn 10' immediately and automatically follows from the second package 12'.
  • An operator can then replace the package 12 by a fresh loaded package and tie the leading end of its yarn to the trailing end or tail of the second package 12'.
  • continuous and uninterrupted supply of elastomeric yarn is able to take place with adequate time available for changing the packages. Apart from yarn breakage, no stoppage of the supply of yarn need occur and this has clear advantages where the processing of the elastomeric yarn is to be carried out at high speed. It will be appreciated that more than two packages may be employed using nose to tail connection.
  • a relatively inelastic nylon yarn is separately supplied and is twisted with the elastomeric yarn to form a composite yarn.
  • Incompletely drawn nylon yarn 22 (partially orientated yarn) is provided from a first yarn package 24 through a guide tube 60 and is fed alongside the elastomeric yarn 10 via drafting rollers 68, 70 to a guide 40 from which the two yarns are twisted together by a twisting head 42 during their passage in a downwardly inclined direction adjacent an electric heater 38 as described in EP-A-0 400 838.
  • the inelastic nylon yarn 22 is supplied from package 24 connected nose to tail with one or more further packages such as the second reserve package 24'.
  • the yarn combining apparatus is described in our prior European patent EP-A-0 400 838 to which reference may be made.
  • the guide 40 is a "twist-stop-pulley" acting as a guide to bring the yarns together and preventing migration of twist in an upstream direction towards the drafting rollers 68, 70.
  • the twisted composite yarn is fed into a nip provided by an "apron" feeder including an endless belt 84 about rollers 79, 81 and cooperating with a driven roll 77.
  • the twisted composite yarn 50 passes to a driven take-up package 54 after passing round a lubricating oil roller 78.
  • An additional plain friction roller type guide 76 guides the composite yarn between the heater 38 and twisting head 42.
  • the apron feeder 77, 84 can be replaced if desired by a pair of nip rollers.
  • the elastomeric yarn 10 is fed to the guide 40 at a relatively low speed such as 125m per minute and the relatively inelastic nylon yarn 22 is fed at a higher speed such as 385m per minute.
  • the speed is increased during passage of the yarns against the heater 38 so as fully to draw the partially orientated nylon yarn and the twisted yarn emerges from the apron feeder 77, 84 at about 500m per minute.
  • Higher output speeds up to 900m per minute may be envisaged to take advantage of the continuous supply of elastomeric yarn by the supply means of the invention.
  • detectors and cutters are provided in the supply of each of the yarns, so that a break in one yarn will be accompanied by cutting of the other yarn to avoid wastage.
  • the processing of the elastomeric and non-elastic yarns may take the form of a relatively conventional wrapping about the elastomeric yarn which becomes a core yarn or a twisting process in which the yarns 10, 22 are twisted approximately equally as shown in Figure 9.
  • Figures 6, 7 and 8 show test results obtained by measurement of tension under different conditions.
  • Figure 7 shows test traces made using the supply means of the present invention whereas
  • Figure 8 shows similar traces made without the device 90.
  • Figure 6 shows traces made when the supply of elastomeric yarn is made at constant extension, rather than using a relaxed supply.
  • Figure 6 shows a test tension trace in respect of an elastomeric yarn (22 d'tex Lycra T146) obtained by means of a tension measuring head responsive to the tension of the yarn 1 running between the supply package and take-up package and an operating extension of 200%.
  • the readings A were taken when the supply package spool was at half size.
  • readings B the supply package was almost finished.
  • the mean tension lies between 1.75gm and 2.00gm.
  • test C from the commencement of a new package, the mean tension remained between 1.60gm and 1.90gm throughout.
  • this shows the traces of a similar apparatus to that shown in Figure 9 but with the tensioning device 90 omitted.
  • the trace X' was of a low mean value, about 0.60gm.
  • tension had risen to 2.00gm mean value and after transfer to a new package 12', the tension dropped very substantially and was subject to considerable irregularities. This is particularly noticeable in trace Z'.
  • Such a range of tension and its irregular nature resulted in a composite yarn being produced which was quite unacceptable for knitting or weaving purposes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (2)

  1. Garnverarbeitungsvorrichtung zum Kombinieren eines relativ unelastischen Garns (22) mit einem elastomeren Garn (10) mit einer hohen Gesamtausdehnung und einem geringen Elastizitätsmodul;
    wobei die Garnverarbeitungsvorrichtung folgendes einschliesst:
    ein Lieferungsmittel, um das relativ unelastische Garn an ein Kombinierungsstation zu liefern;
    eine Lieferungspackung (12) für das elastomere Garn, in der das elastomere Garn in einer entspannten Gestalt geliefert ist;
    Spannmittel (90), die das elastomere Garn von der Lieferungspackung empfangen, und die angeordnet sind, um eine vorbestimmte Spannung abzugeben, die ausreicht, um das elastomere Garn auf 50-60% seiner maximalen gesamten Ausdehnung auszudehnen, und das so gespannte elastomere Garn zu der Kombinierungsstation (42) zu bringen;
    dadurch gekennzeichnet, dass
    die Garnverarbeitungsvorrichtung kontinuierlich betrieben werden kann;
    die Lieferungspackung (12) für das elastomere Garn (10) nicht angetrieben ist;
    eine weitere nicht angetriebene Lieferungspackung (12') für das elastomere Garn vorgesehen ist, wobei das führende Ende des Garns (10') an das hintere Ende des Garns (10) der Lieferungspackung (12) für kontinuierliche Lieferung des elastomeren Garns (10,10') zu den Spannmitteln angeschlossen ist;
    die Spannmittel (90) eine drehbar angetriebene Spannrolle (91) umfassen, die eine Vielzahl von Wicklungen des elastomeren Garns (10, 10') über das Kopfende von der nicht angetriebenen Lieferungspackung (12 oder 12') über einen Einlass (94) empfangen können;
    wobei jede Lieferungspackung (12,12') mit demselben Winkel mit Bezug auf den Einlass (94) des Spannmittels (90) geneigt ist;
    Spannauffindungsmittel (93,97) zwischen der Rolle (91) und der Kombinierungsstation (42) angeordnet sind, und ein Signal in Reaktion auf die tatsächliche sofortige Spannung zu liefern, die in dem elastomeren Garn (10,10') aufgefunden wird;
    Antriebssteuermittel (97,98) vorgesehen sind, um den Antrieb zu der Spannrolle (91) in Reaktion auf das sofortige Spannsignal zu steuern, um im wesentlichen konstante Spannung des elastomeren Garns durch den kontinuierlichen Betrieb der Garnverarbeitungsvorrichtung zu liefern, ungeachtet welche der Lieferungspackungen (12,12') an die Rolle (91) angeschlossen ist.
  2. Garnverarbeitungsvorrichtung nach Anspruch 1, weiterhin dadurch gekennzeichnet, dass das Spannauffindungsmittel einen Schwenkarm (93) umfasst, wobei der Schwenkbewegung des Arms durch ein Neigungsmittel (97,98) widerstanden wird, das einen Drehmoment-Motor (98) umfasst, und die Bewegung des Arms das sofortige Spannsignal an einen Schrittmotor liefert, der angeordnet ist, um die Spannrolle (91) anzutreiben.
EP19920300679 1991-02-12 1992-01-27 Fadenverarbeitungsmaschine Expired - Lifetime EP0499380B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919102956A GB9102956D0 (en) 1991-02-12 1991-02-12 Controlled yarn supply means
GB9102956 1991-02-12

Publications (2)

Publication Number Publication Date
EP0499380A1 EP0499380A1 (de) 1992-08-19
EP0499380B1 true EP0499380B1 (de) 1997-04-23

Family

ID=10689911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920300679 Expired - Lifetime EP0499380B1 (de) 1991-02-12 1992-01-27 Fadenverarbeitungsmaschine

Country Status (3)

Country Link
EP (1) EP0499380B1 (de)
DE (1) DE69219179D1 (de)
GB (1) GB9102956D0 (de)

Cited By (1)

* 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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013904A1 (en) * 1995-10-12 1997-04-17 E.I. Du Pont De Nemours And Company Process and apparatus for knitting fabric with non-elastic yarn and bare elastomeric yarn and sweater knit fabric construction
FR2749859B1 (fr) * 1996-06-18 1998-09-18 Icbt Valence Procede de realisation d'un fil mixte extensible et machine pour sa mise en oeuvre
FR2757496A1 (fr) * 1996-12-23 1998-06-26 Vinh Chek Hor Asservissement d'un derouleur d'elastique
ITMI20042293A1 (it) * 2004-11-26 2005-02-26 Tiziano Barea Metodo perfezionato per alimentare un filato ad una macchina tessile atto alla sua lavorazione e macchina attuante detto metodo
EP3771672B1 (de) * 2019-07-30 2024-04-17 TMT Machinery, Inc. Adapter und spulenaustauschvorrichtung
EP4310044A1 (de) * 2022-07-20 2024-01-24 Savio Macchine Tessili S.p.A. Mit einer fadenspannvorrichtung eines garns versehene wickeleinheit und zugehöriges steuerungsverfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281087A (en) * 1964-03-27 1966-10-25 Dixie Yarns Winding of yarns of high elasticity
US3657873A (en) * 1969-12-08 1972-04-25 Kirkland H Gibson Composite elastic core yarn
EP0225670B1 (de) * 1985-12-09 1989-05-17 Picanol N.V. Verfahren und Vorrichtung zum Abwickeln eines Fadens von einer Garnspule in Webmaschinen
DE3824034C1 (de) * 1988-07-15 1989-09-14 Gustav 7290 Freudenstadt De Memminger

Cited By (1)

* 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

Also Published As

Publication number Publication date
DE69219179D1 (de) 1997-05-28
GB9102956D0 (en) 1991-03-27
EP0499380A1 (de) 1992-08-19

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