EP0753613B1 - Vorrichtung zum fortlaufenden Einbringen eines Kernfadens in ein Faserband - Google Patents

Vorrichtung zum fortlaufenden Einbringen eines Kernfadens in ein Faserband Download PDF

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Publication number
EP0753613B1
EP0753613B1 EP19960440055 EP96440055A EP0753613B1 EP 0753613 B1 EP0753613 B1 EP 0753613B1 EP 19960440055 EP19960440055 EP 19960440055 EP 96440055 A EP96440055 A EP 96440055A EP 0753613 B1 EP0753613 B1 EP 0753613B1
Authority
EP
European Patent Office
Prior art keywords
draw
roll
drawing line
core thread
core
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
EP19960440055
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English (en)
French (fr)
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EP0753613A1 (de
Inventor
Jean-François Ferdinand
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.)
Nouvelle D'applications Mecaniques Et Optiques Snamo SA Ste
Original Assignee
Nouvelle D'applications Mecaniques Et Optiques Snamo SA Ste
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Publication date
Application filed by Nouvelle D'applications Mecaniques Et Optiques Snamo SA Ste filed Critical Nouvelle D'applications Mecaniques Et Optiques Snamo SA Ste
Publication of EP0753613A1 publication Critical patent/EP0753613A1/de
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Publication of EP0753613B1 publication Critical patent/EP0753613B1/de
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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
    • D02G3/324—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic using a drawing frame

Definitions

  • the present invention relates to a device for the continuous insertion of a elastic core thread in a wick of fibers for a spinning machine, so to make a wire commonly called “core spun”, comprising a cylinder deliverer bringing together the wick of fibers and the core thread, means for unwinding a coil of core wire resting on two support shafts parallel axes, driven in the same direction of rotation and supporting said coil, and a core wire return roller disposed between the means of unwinding and the delivery cylinder.
  • the manufacturing process relating to the insertion of an elastic core wire into a wick of fibers in a spinning machine is well known and allows the making a cotton thread or another material, commonly called "core spun", having elastic properties, in particular for the manufacture of knitted textiles such as t-shirts, underwear, etc, and textile articles in warp and weft.
  • Good quality means a thread product which exhibits, on the one hand, homogeneous elastic characteristics so a percentage of elongation equivalent to different points the along this wire and, on the other hand, a regular external appearance, without overshoot core wire at the outer periphery of said finished wire.
  • a product thread whose homogeneous elastic characteristics makes it possible to obtain a product knitted or woven with a regular appearance. Otherwise, the differences of elasticity create tighter stitches than others. What can cause chevrons in the woven or knitted product.
  • a product thread of which the external appearance is regular allows to obtain a knitted or woven product of uniform color.
  • the core thread appears at the periphery of the finished yarn, it gives rise to differences in coloring given that it does not have the same dye characteristics as those of the wick, being of a different nature. These color differences can generate darker or lighter spots or traces on the woven product or knitted.
  • the core wire deflection roller is located near the delivery cylinder on which the core thread is inserted into the fiber wick. It turns out that during the strand of fibers does not keep a constant position on the delivery cylinder. On the contrary, this position oscillates on both sides from a central point randomly. Therefore, the point of encounter between the core thread and the wick of fibers is not constant. If the return roller of the core wire is too close to the delivery cylinder, the wire soul does not have enough freedom to follow the movement of the wick on said delivery cylinder. This results in positioning faults in the core wire relative to the center of the wick of fibers.
  • the known devices generally only have one drawing train between the point of unwinding the reel of the core wire and the delivery cylinder.
  • the wire of soul is under maximum tension at the time of its insertion into the wick of fibers and we find the drawback mentioned above namely that he does not have enough freedom to follow the movement of the wick on said delivery cylinder.
  • the stretching that the core thread undergoes is not optimal for it to be stabilized. Therefore, at the time of its insertion in the wick of fibers, it still stretches randomly and causes differences in elongation in the finished wire.
  • French patent FR-A-1 398 558 describes a process for manufacturing a wire composite elastic of high apparent volume from one or more non-elastic filaments twisted with an elastic synthetic filament. he it is expected that the elastic filament will be stretched by a single stretching train provided in the area just before joining it with the other filaments non-elastic, between a pair of rollers and the delivery cylinder. This process does not allow the manufacture of a wire called "core spun". In addition, it presents all the disadvantages mentioned above.
  • French patent FR-A-1 430 763 describes a device for manufacturing wires highly swollen elastic bands, from one or more strands of fibers non-elastic twisted with an elastic synthetic filament. It is provided that the elastic filament is stretched by a single stretching train defined by the idler roller and the final stretching rollers between which it is simultaneously assembled with the wicks of fibers. We also find here same disadvantages as above.
  • the present invention is an improvement of the device described in the French Patent No. 2,668,174 and has the main purpose of overcoming the disadvantages mentioned above.
  • a device as defined in the preamble and characterized in that the deflection roller is distant from the delivery cylinder by a distance at least equal to 250 mm, in that the core wire is free over this whole distance, so that it can follow the variations of displacement small amplitude of the wick on the delivery cylinder, in that the device comprises means for drawing said core wire comprising a first drawing train defined by the support shaft and the idler roller and a second drawing train defined by the idler roller and the delivery cylinder and in that the total stretch coefficient obtained successively by the first stretching train and by the second stretching train is distributed at a rate of distribution which is much higher for the first drawing train compared to to the second drawing train in such a way that the core wire is present on the delivery cylinder with a very low differential tension, the distribution ratio of the stretch coefficient for the first stretch train being between 80 and 98% and that for the second stretch train being between 2 and 20%.
  • the distribution rate of the stretch coefficient for the first stretch train is close to 95% and that for the second stretching train is close to 5%.
  • the support shafts, the idler roller and the delivery cylinder are independently driven by motors individual powered by electronic speed controllers.
  • the device may include a programmable central control unit which controls said individual motors.
  • the distance between the idler roller and the delivery cylinder is preferably adjustable.
  • the idler roller has a V-shaped central groove, the bottom of said groove having a section in an arc, the radius of which depends on the diameter of the core wire.
  • the illustrated embodiment relates to a known type of machine, continuously manufacturing at least two similar threads 1 each of which is formed from a wick of cotton fibers 2, or a other material, and an elastic core wire 3, generally made of material synthetic LYCRA® type.
  • the two sons 1 are then returned or wound together in an unrepresented part of the machine.
  • Each wicks of fibers 2 is delivered, in the direction indicated by the arrows A, by a device not shown, crosses a drawing train 5, then passes on a delivery cylinder 6 against which it is applied by a roller presser 7.
  • Each core wire 3 is unwound from a spool 8 and passes over a deflection roller 9 before being introduced between the pressure roller 7 and the delivery cylinder 6 to join the wick 2 in the forming wire 1.
  • the idler roller 9 is positioned at an adjustable distance D from the cylinder deliverer 6 so that the core wire 3 is free to follow the displacement of the wick of fibers 2 on the delivery cylinder 6. From this way, the core wire 3 is automatically positioned inside the wick whatever the position of the insertion point on the delivery cylinder 6.
  • the distance D is adjustable, the idler roller being mounted on a mobile support at by means of a screw / nut system or by a jack (not shown). She can be variable from 250 to 400 mm but must not be less than 250 mm for the reasons mentioned above.
  • each coil 8 of core wire 3 rests freely on two similar horizontal rotary support shafts 20 and turning in the same direction, as indicated by the arrows. However, two coils 8 rotate in opposite directions in the example shown.
  • the two support shafts 20 of the same device are driven in synchronism at a speed V20 by means of an electric motor 21 powered by an electronic speed controller.
  • the cylinder deliverer 6 and the idler roller 9 are driven individually and respectively at a speed V6 and V9 by an electric motor 22, 23 powered by an electronic speed controller or any other device such as pulleys and toothed belts.
  • This type of drive allows precise adjustment of speeds V20 and V9 respectively as a function of the speed V6 which is generally defined by the technical characteristics of the fiber wick.
  • This insertion device is provided with means for stretching the elastic core wire 3 between the bearing shafts 20 and the cylinder deliverer 6.
  • These drawing means comprise two drawing trains, one first 24 defined by the support shafts 20 and the idler roller 9 and a second 25 defined by the idler roller 9 and the delivery cylinder 6.
  • the drawing coefficient of the first drawing train 24 which is obtained by the difference in speeds V9 -V20 is greater than the stretch coefficient of second drawing train 25 which is obtained by the difference in speeds V6-V9.
  • the first drawing train 24 will be adjusted to obtain a first coefficient of 3.25 and the second drawing train 25 for a second coefficient of 1.04.
  • the distribution rate of the total stretch coefficient for the first drawing train is between 80 and 98% and is preference close to 95% and that for the second drawing train is between 2 and 20% and is preferably close to 5%. It is obvious that a wide range of stretch coefficient and distribution ratio can be obtained without limitation.
  • This double drawing train allows on the one hand to stabilize the elasticity of the core wire 3 after a first stretch obtained thanks to the first drawing train 24 whose distribution rate of the drawing coefficient is much higher compared to the second drawing train 25.
  • a central control unit programmable 26 can advantageously complement this device so centralize the adjustment criteria and control parameters of the variable speed drives, and store adjustment programs defined by compared to a type of core wire 3 and a type of fiber wick 2.
  • FIG. 2 illustrates in detail the idler roller 9 of said device.
  • This pebble is preferably made of heat treated steel to present a condition surface with very low coefficient of friction and high resistance mechanical. It has a V-shaped groove 27 for guiding the core wire 3 perfectly.
  • the bottom 28 of the groove has an arcuate profile of circle whose radius depends on the diameter of said core wire 3. This profile rounded allows the core wire to be guided in good conditions without risking damage it, cut it or scratch it at a sharp angle.

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

Claims (6)

  1. Verfahren zum fortlaufenden Einbringen eines elastischen Seelenfadens (3) in ein Faserband (2) für eine Spinnmaschine, um einen sogenannten, "Core Spun"-Faden herzustellen, wobei diese Vorrichtung aus einer Abzugwalze (6) besteht, die gleichzeitig das Faserband (2) und den Seelenfaden (3) vorwärtszieht, sowie aus den Mitteln zum Abspulen einer den Seelenfaden (3) tragenden Spule (8), welche auf zwei in die selbe Drehrichtung angetriebene und die Spule (8) tragende Tragwellen (20) mit parallelen Achsen aufliegt, und aus einer zwischen den Abspul-Mitteln (8, 20) und der Abzugwalze (6) angeordneten Seelenfaden (3)-Umkehrrolle (9), dadurch gekennzeichnet, daß die Umkehrrolle (9) mit einem Abstand (D), der mindestens gleich 250 mm ist, von der Abzugwalze (6) entfernt angebracht ist, dadurch, daß der Seelenfaden (3) auf der Ganzheit dieses Abstandes (D) frei ist, damit er den Bewegungs-Variationen des Faserbands (2) auf der Abzugwalze (6) folgen kann, dadurch, daß die besagte Vorrichtung Streckmittel für den besagten Seelenfaden (3) aufweist, wobei diese Streckmittel aus einer durch die Tragwelle (20) und die Umkehrrolle (9) festgelegten ersten Streckstraße (24) und aus einer durch die Umkehrrolle (9) und die Abzugwalze (6) festgelegten zweiten Streckstraße (25) bestehen, und dadurch, daß der gesamte, nacheinander durch die erste Streckstraße (24) und die zweite Streckstraße (25) erhaltene Streck-Koeffizient gemäß einer Verteilungsrate aufgeteilt ist, die für die erste Streckstraße (24) in Bezug auf die zweite Streckstraße (25) viel größer ist, so daß der Seelenfaden (3) mit einer sehr schwachen Differenzial-Spannung die Abzugwalze (6) erreicht, wobei die Verteilungsrate des Streck-Koeffizientes der ersten Streckstraße (24) zwischen 80 und 98% liegt, und der der zweiten Streckstraße (25) zwischen 2 und 20% liegt.
  2. Vorrichtung gemäß Anforderung 1, gekennzeichnet dadurch, daß die Verteilungsrate des Streck-Koeffizientes der ersten Streckstraße (24) in der Nähe von 95% liegt, und das der zweiten Streckstraße (25) in der Nähe von 5% liegt.
  3. Vorrichtung gemäß Anforderung 1, gekennzeichnet dadurch, daß die Tragwellen (20), die Umkehrrolle (9) und die Abzugwalze (6) unabhängig voneinander durch Elektromotoren (21-23) angetrieben werden, die durch elektronische Regelantriebe gesteuert werden.
  4. Vorrichtung gemäß Anforderung 3, gekennzeichnet dadurch, daß sie eine zentrale programmierbare Steuereinheit (26) besitzt, die angeordnet ist um die besagten einzelnen Motore (21-23) zu steuern.
  5. Vorrichtung gemäß Anforderung 1, gekennzeichnet dadurch, daß der Abstand (D) zwischen der Umkehrrolle (9) und der Abzugwalze (6) verstellbar ist.
  6. Vorrichtung gemäß Anforderung 1, gekennzeichnet dadurch, daß die Umkehrrolle (9) eine V-förmige zentrale Rille (27) aufweist, wobei der Boden (28) der besagten Rille einen kreisbogenförmigen Querschnitt aufweist, dessen Radius vom Durchmesser des Seelenfadens (3) abhängig ist.
EP19960440055 1995-07-11 1996-07-11 Vorrichtung zum fortlaufenden Einbringen eines Kernfadens in ein Faserband Expired - Lifetime EP0753613B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9508585A FR2736658B1 (fr) 1995-07-11 1995-07-11 Dispositif pour l'insertion d'un fil d'ame dans une meche de fibres
FR9508585 1995-07-11

Publications (2)

Publication Number Publication Date
EP0753613A1 EP0753613A1 (de) 1997-01-15
EP0753613B1 true EP0753613B1 (de) 2000-06-21

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Application Number Title Priority Date Filing Date
EP19960440055 Expired - Lifetime EP0753613B1 (de) 1995-07-11 1996-07-11 Vorrichtung zum fortlaufenden Einbringen eines Kernfadens in ein Faserband

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EP (1) EP0753613B1 (de)
DE (1) DE69608929D1 (de)
FR (1) FR2736658B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ300483B6 (cs) * 2003-09-04 2009-05-27 Rieter Cz A.S. Zarízení k odvíjení lineárního textilního materiálu pri výrobe složkové príze
CN102471952B (zh) * 2009-07-09 2015-07-08 阿姆斯勒纺织公司 用于制造包芯纱的设备及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2076271A (en) * 1935-09-12 1937-04-06 Harris Textile Machinery Corp Covered elastic thread
NL75778C (de) * 1958-05-20
FR1398558A (fr) * 1964-06-12 1965-05-07 Monsanto Co Procédé de fabrication d'un fil élastique composite à volume apparent élevé
US3342028A (en) * 1965-04-21 1967-09-19 Kurashiki Rayon Co Method of producing an elastic core yarn
FR1430763A (fr) * 1965-04-21 1966-03-04 Chemstrand Ltd Procédé et appareil pour la filature de fils élastiques fortement gonflés
FR2668174A1 (fr) * 1990-10-17 1992-04-24 Meyer Michel Sa Entr Dispositif pour l'insertion d'un fil d'ame dans une meche de fibres.
DE69218565T2 (de) * 1991-12-11 1997-08-07 Nitto Boseki Co Ltd Schmelzfähiges adhäsives Garn und Verfahren zu dessen Herstellung

Also Published As

Publication number Publication date
FR2736658B1 (fr) 1997-09-05
DE69608929D1 (de) 2000-07-27
FR2736658A1 (fr) 1997-01-17
EP0753613A1 (de) 1997-01-15

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