EP0488939B1 - Méthode et dispositif pour le désentrelacement d'un tampon de fil après la texturation - Google Patents

Méthode et dispositif pour le désentrelacement d'un tampon de fil après la texturation Download PDF

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Publication number
EP0488939B1
EP0488939B1 EP91810691A EP91810691A EP0488939B1 EP 0488939 B1 EP0488939 B1 EP 0488939B1 EP 91810691 A EP91810691 A EP 91810691A EP 91810691 A EP91810691 A EP 91810691A EP 0488939 B1 EP0488939 B1 EP 0488939B1
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EP
European Patent Office
Prior art keywords
yarn
plug
deflection
cooling
drum
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
EP91810691A
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German (de)
English (en)
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EP0488939A1 (fr
Inventor
Peter Grossenbacher
Werner Nabulon
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.)
Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0488939A1 publication Critical patent/EP0488939A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/12—Modifying stretch/bulk properties of textured yarns or the like by after-treatment
    • 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
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes

Definitions

  • the invention is in the field of textile technology and relates to a method and a device according to the preambles of the independent process and the independent device claim known from CH-A-618 561, with which the plug formed from thermoplastic yarns during texturing is dissolved and a spoolable therefrom Yarn is produced.
  • Thermoplastic yarns which usually consist of several fibrils, are subjected to heat treatment using known texturing methods and are driven through texturing nozzles or pressed in stuffer boxes. At the exit of the texturing nozzle or stuffer box there is a still warm but mechanically but relatively stable plug, which in the next process step usually has to be cooled and, above all, dissolved before the textured (crimped) yarn can be wound up.
  • the yarn plug obtained from the texturing is cooled while it is, for example, in a vertical position Pipe moved up.
  • the yarn is accelerated by a draw-off device, so that the plug dissolves into a more or less crimped yarn.
  • This yarn is passed over a mechanical brake, for example an arrangement of brake rods, and then wound up.
  • the take-off and winding device is operated at a constant speed (take-off speed), the mechanical brake brings about a constant thread tension during winding and prevents an increase in the thread tension in the cooling tube, which would lead to an early and uncontrolled plug release.
  • Measuring the height of the plug in the cooling tube or measuring its speed, both of which depend on the texturing conditions, can be used as measuring elements for regulating the texturing conditions.
  • Such a method and a corresponding device are described, for example, in European Patent No. 0 021 573.
  • a further method of dissolving the plug after texturing thermoplastic yarns is that the plug is guided from the texturing nozzle onto a sieve drum or perforated roller rotating at a constant speed, on which it is held by air sucked into the drum or roller and cooled at the same time. The yarn is accelerated on the drum and the plug is released. The yarn is also drawn off and wound up by a mechanical brake from the screening drum. Fluctuations in plug length caused by fluctuations in texturing conditions are prevented by the constant speed of the drum. Fluctuations in the length of the plugs due to the pulling-off process are automatically regulated by automatically changing the friction of the drawn-off yarn on the drum.
  • a corresponding method and a corresponding device are described, for example, in Swiss Patent No. 618,561.
  • the plug is converted into a spoolable yarn in two steps. First, the plug is released into a more or less crimped but oriented in a main direction. This happens between the end of the graft and the mechanical brake. The yarn is then brought to the desired thread tension between the mechanical brake and the take-off spool, so that it has the desired, effective or possibly only latent crimp in the wound state.
  • the same force in the first part of the process (dissolving the plug) is the weight and the resistance of the plug in the tube for the first described process, and the braking force for the second described process is caused by the friction of the plug and the drawn-off yarn on the sieve drum. It is necessary to split the process in two by using the mechanical brake, since the plug dissolution only takes place in an orderly and controlled manner when only minimal tension forces act, but on the other hand are far from sufficient to stretch the yarn in the desired mass.
  • the process is said to provide a spoolable yarn with intact fibrils. It is intended to allow the yarn tension between the end of the graft and the take-off spool to be increased successively, so that in one process step the graft can be released with low yarn tension and wound up with increased yarn tension.
  • the method is intended to be self-regulating in that it not only compensates for fluctuations in the plug properties due to fluctuations in the texturing conditions, but also, if possible, for fluctuations in the yarn entering the texturing by appropriate stretching of the crimped yarn.
  • the basic principle of the method according to the invention is based on the fact that instead of the mechanical friction which is used in the methods according to the prior art as a tension force against the direction of yarn movement, the yarn is accelerated and freely deflected. This creates forces that are opposite to the yarn movement, that is, the thread brake. According to the invention, these forces can be increased by appropriate use of gravity, aerodynamic or hydrodynamic frictional forces. Both the deflection forces and the dynamic frictional forces can be successively increased between the end of the plug and the take-off spool, so that there is no need to divide the process into stopper and yarn stretching.
  • FIG. 1 illustrates the forces that act when a yarn 1 is deflected.
  • each piece of yarn for example the piece of yarn between points A and B, must be included the mass m and the length l, a corresponding centripetal force K Z are applied.
  • This centripetal force can be broken down into the two force components K SV and K SR , which act in opposite directions in the yarn movement direction and the yarn movement direction, which act from the adjacent yarn pieces on the yarn piece under consideration and tension the yarn piece. From the physical conditions for the centripetal force it follows:
  • (m / l) x v2 where m / l is the mass of the yarn per unit length, v is the yarn speed.
  • Figure 2 shows the inventive method schematically.
  • the yarn plug 1.1 is pushed at the constant speed v 1 in the direction indicated by the arrow v 1, the yarn 1.2 is drawn off in a different direction at the constant speed v 2, which is greater than v 1.
  • the change in direction necessitates a deflection which is stable under the conditions specified in connection with FIG. 1 without mechanical guidance.
  • Forces 1.2 acting forces also have a dissolving and stretching effect.
  • the speeds v1 and v2 must be set so that the deflection is stable and that the forces are sufficient to dissolve the plug and stretch the yarn to the desired extent.
  • the deflection radius will be set depending on the selected speeds, the available free yarn length and the arrangement of the system components.
  • the balance is mainly dependent on the elastic and plastic properties of plug 1.1 and yarn 1.2, the two speeds v1 and v2 and the system-related deflection angle ⁇ .
  • a certain curve shape of the plug-yarn loop will correspond to each balance. In the state of equilibrium, the plug-yarn loop is so stable that it does not require any mechanical backdrop to support it.
  • the braking force on the yarn can be increased rsp. are weakened by any forces which additionally act on the yarn in such a way that they can be broken down into components in such a way that a component counteracts the direction of the yarn movement, that is to say acts as a braking force, rsp. acts in the direction of yarn movement, thus weakening the braking effect.
  • forces which additionally act on the yarn in such a way that they can be broken down into components in such a way that a component counteracts the direction of the yarn movement, that is to say acts as a braking force, rsp. acts in the direction of yarn movement, thus weakening the braking effect.
  • gravity or the frictional force on a flowing or standing medium can be used in this way.
  • FIG. 3a shows an embodiment of the device according to the invention.
  • the plug 1.1 which emerges from any texturing device 4, be it a texturing nozzle or a stuffer box, is applied in points C to a sieve drum or perforated roller 2 rotating at a constant surface speed v 1. Air is sucked into the screening drum 2, which simultaneously holds and cools the plug 1.1 on the drum surface.
  • the plug 1.1 moves with the surface of the drum and, when it reaches the point D 1 rsp. D2 has reached, by a corresponding chicane or by closing the perforation so that it is no longer held by the negative pressure in the drum, detached from the drum surface.
  • the yarn 1.2 is drawn off from the take-off spool 3 at the speed v 2.
  • the cooling angle ⁇ ( ⁇ 1 rsp. ⁇ 2) changes. This changes above all the deflection angle ⁇ ( ⁇ 1 rsp. ⁇ 2), which affects the braking effect of the arrangement and thus the yarn tension in front of the take-off spool. In addition, such a change also changes the cooling time of the plug, which will have an impact due to the changed elastic and plastic properties of the plug and the yarn.
  • the cooling angle ⁇ is well suited as a variation parameter for the stretching process.
  • the cooling angle ⁇ can be varied by displacing the baffle which releases the plug from the drum or by displacing the means which are provided for closing the perforation in the interior of the drum.
  • the arrangement shown in FIG. 3a for the plug release according to the invention can be changed by changing the relative positions of the screening drum 2 of the take-off spool 3 are changed in such a way that gravity is increasingly included in the braking process during the deflection.
  • Such an arrangement is shown in FIG. 3b.
  • the plug 1.1 is pushed upward by appropriate arrangement of the detachment point D3 by its kinetic energy and changes its direction towards the bottom in a point E, which is dependent on the plug speed, the plug weight and the weight of the downward hanging plug piece. From this movement, it is deflected upwards again by the correspondingly arranged take-off spool in the area of point F.
  • the upward deflection as described in connection with the method according to the invention, has a braking effect on the stopper.
  • the gravity at the deflection point F also has a braking effect and increases the braking effect, which results in a higher yarn tension.
  • Variants of the two devices according to the invention shown in FIGS. 3a and 3b consist in that additional means are attached with which, for example, air is blown against the deflection point, specifically from its concave side in order to increase the braking force, from the convex side to reduce the braking effect.
  • additional means are attached with which, for example, air is blown against the deflection point, specifically from its concave side in order to increase the braking force, from the convex side to reduce the braking effect.
  • FIGS. 4a and 4b show exemplary embodiments of the device according to the invention, in which no rotating sieve drum is used to cool the yarn plug.
  • the plug 1.1 is conveyed in both cases through an inlet opening 40 into a channel-shaped, ventilated housing 41, in which it is driven downward by gravity emotional. In this housing, it is deflected by the force and withdrawal direction of the take-off spool 3 and is withdrawn accelerated through the outlet opening 42.
  • FIG. 4a shows a corresponding housing 41a into which the plug 1.1 is inserted via the inclined guide groove 43a provided with holes.
  • the guide groove 43a is followed by a deflection space 44a with a horizontal bottom, also provided with holes, in which the plug 1.1 is pulled off towards the top and against the direction of its insertion and is simultaneously released.
  • the exit opening 42a is located just above the entry opening 40a.
  • An exhaust air duct 45a adjoins the deflection space 44a on the side opposite the inlet and outlet opening and is connected to the deflection space 44a by holes.
  • Air is actively sucked out of the housing 41a through the exhaust air duct 44a and outside air is sucked in through the holes in the guide trough 43a and the deflection space 44a and through the inlet and outlet openings (40a / 42a).
  • the resulting air flow in the housing 41a (indicated by arrows in the figure) runs in the inlet opening 40a in the yarn transport direction, in the outlet opening 42a against the yarn movement direction, so that it acts as a brake on the yarn 1.2.
  • the air flow has a more or less braking effect on the plug and yarn.
  • Figure 4b shows a device similar to Figure 4a.
  • the housing 41b has a much steeper guide groove 43b, so that the deflection loop has a hanging position.
  • gravity acts as a brake, but the exhaust air duct 45b is arranged between the inlet opening 40b and the outlet opening 42b in such a way that the air flow through the housing 41b counteracts the braking.
  • FIG. 5 shows how any of the embodiments of the device for plug dissolution according to the invention can be integrated into a complete arrangement for producing textured yarns.
  • the arrangement is shown in FIG. 5a, while FIG. 5b shows a corresponding arrangement according to the prior art and is used for comparison.
  • the arrangement comprises an entry zone between points P and Q, in which the fibrils emerging from the spinnerets are combined to form a yarn and the yarn is pre-stretched.
  • the texturing zone follows between points Q and R, in which the yarn is textured and the plug formed during texturing is dissolved. This is followed by the draw-off zone between points R and T, in which the yarn is stretched, swirled and wound up.
  • the point R between the texturing zone and the draw-off zone is not shown in FIG.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Claims (10)

  1. Procédé pour délier un bouchon et pour l'étirage d'un fil frisé, après texturation,
    caractérisé par le fait que,
    après le refroidissement du bouchon, le fil est dévié librement sans frottement mécanique, dans le but de délier le bouchon, et est extrait et étiré avec une vitesse qui est plus importante que la vitesse du bouchon, et que, dans ce processus, il se forme une boucle de fil en bouchons qui ne nécessite aucune coulisse mécanique pour son soutien.
  2. Procédé selon revendication 1,
    caractérisé par le fait que,
    en plus des forces produites par la déviation, des composantes correspondantes de la force de pesanteur, et/ou de forces de frottement dynamiques, sont exploitées pour le déliement du bouchon et l'étirage du fil faisant suite.
  3. Procédé selon l'une des revendications 1 ou 2,
    caractérisé par le fait que
    la matière spécifique est variée par la variation de l'angle de refroidissement τ changeant le temps de refroidissement du bouchon, et ou de l'angle de déviation β agissant sur la tension de fil avant la bobine d'extraction.
  4. Dispositif servant à texturer un fil thermoplastique (1.2) en mouvement, avec un dispositif de texturation (4) pour la formation d'un bouchon (1.1), une partie de refroidissement (2, 43a, 43b) pour refroidir le bouchon, et une partie d'extraction (3) pour extraire le bouchon de la partie de refroidissement et étirer le fil,
    caractérisé par le fait que
    la partie d'extraction (3) est disposée de telle sorte par rapport à la partie de refroidissement (2, 43a, 43b) que, depuis une première direction de mouvement, résulte une déviation libre, non dirigée mécaniquement du bouchon et du fil, dans une deuxième direction de mouvement, et que la partie d'extraction est formée de telle manière que le fil est accéléré depuis une vitesse de bouchon (v1) à une vitesse de fil (v2) qui suffit au déliement du bouchon.
  5. Dispositif selon revendication 4,
    caractérisé par le fait que
    la partie de refroidissement comprend un tambour perforé (2) ou un rouleau perforé, dans lequel une dépression est produite par des moyens correspondants, et des moyens de décollage, variables dans leurs positions relatives au point central du tambour, à l'aide desquels le bouchon est décollé du tambour.
  6. Dispositif selon revendication 5,
    caractérisé par le fait que
    les moyens de décollage sont constitués par une chicane mécanique, positionnée à l'endroit de décollage désiré (D₁, D₂, D₃), au-dessus de la surface de tambour, ou par un moyen de fermeture disposé à l'intérieur du tambour, avec lequel les trous d'air dans la surface de tambour sont fermés à l'endroit de décollage désiré.
  7. Dispositif selon l'une des revendications 4 à 6,
    caractérisé par le fait
    qu'un carter aéré (41a, 41b) est disposé entre la sortie de la partie de refroidissement (2, 43a, 43b) et la partie d'extraction (3), dans lequel se déplace la boucle de déviation.
  8. Dispositif selon revendication 7,
    caractérisé par le fait que
    la partie de refroidissement (43a, 43b) est intégrée dans le Carter (41a, 41b), et est constituée par une gouttière de guidage inclinée (43a, 43b), possédant des trous d'air.
  9. Dispositif selon revendication 8,
    caractérisé par le fait que
    l'angle d'inclinaison de la gouttière de guidage possède une grandeur telle que la boucle de déviation pend dans le carter, et que, par une disposition adéquate de l'aération, on évite, à l'aide d'une chambre de déviation (44a, 44b), que le bouchon ne soit délié par sa propre force de pesanteur.
  10. Dispositif selon l'une des revendications 4 à 9,
    caractérisé par le fait
    qu'une buse pneumatique (46) est disposée dans le sens de mouvement du fil, avant la partie d'extraction, dans laquelle un courant d'air est produit avec des moyens d'aération, qui simultanément freine le fil et le tourbillonne.
EP91810691A 1990-11-29 1991-08-30 Méthode et dispositif pour le désentrelacement d'un tampon de fil après la texturation Expired - Lifetime EP0488939B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH377590 1990-11-29
CH3775/90 1990-11-29

Publications (2)

Publication Number Publication Date
EP0488939A1 EP0488939A1 (fr) 1992-06-03
EP0488939B1 true EP0488939B1 (fr) 1995-02-22

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US (1) US5339502A (fr)
EP (1) EP0488939B1 (fr)
JP (1) JPH04263635A (fr)
DE (1) DE59104693D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH689040B5 (de) * 1992-11-19 1999-02-26 Rieter Ag Maschf Verfahren und Vorrichtung zum Texturieren von thermoplastischen Fäden.
DE59908662D1 (de) * 1998-09-10 2004-04-01 Barmag Barmer Maschf Texturiermaschine zum texturieren und aufwickeln eines fadens
US6528950B2 (en) * 2000-04-06 2003-03-04 Semiconductor Energy Laboratory Co., Ltd. Electronic device and driving method
DE10202788A1 (de) * 2002-01-25 2003-07-31 Rieter Ag Maschf Texturieranlage und Texturierdüse hierfür
DE102004029219A1 (de) 2004-06-16 2006-01-05 Maschinenfabrik Rieter Ag Texturiereinrichtung mit Entwirrstreckenbremse
WO2006048035A1 (fr) * 2004-11-05 2006-05-11 Saurer Gmbh & Co. Kg Procédé et un dispositif pour filer et texturer un fil synthétique
US20090246896A1 (en) * 2007-07-19 2009-10-01 Melissa Kreger Method and apparatus for improved printed cathodes for organic electronic devices

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
GB1132984A (en) * 1965-04-01 1968-11-06 Courtaulds Ltd Process and apparatus for opening tow
US4019228A (en) * 1970-03-05 1977-04-26 Mitsubishi Rayon Co., Ltd. Crimping apparatus
US3861133A (en) * 1971-12-22 1975-01-21 Du Pont Production of highly crimped polyester yarn
US3885278A (en) * 1973-05-11 1975-05-27 Whitaker Co Fred Apparatus for texturing yarn
US4027466A (en) * 1975-06-17 1977-06-07 Heberlein Maschinenfabrik Ag Process for continuously treating thermoplastic yarns
DE2709680C2 (de) * 1977-03-05 1985-07-18 Basf Farben + Fasern Ag, 2000 Hamburg Verfahren zum Abtransport texturierter Garne
JPS54151653A (en) * 1978-05-16 1979-11-29 Teijin Ltd Crimping method and apparatus of yarn
US4309801A (en) * 1979-06-28 1982-01-12 Chevron Research Texturizing process
US4319388A (en) * 1980-06-11 1982-03-16 E. I. Du Pont De Nemours And Company Treatment for bulked continuous filament yarns
JPS607049A (ja) * 1983-06-24 1985-01-14 Hitachi Ltd 電位測定装置
GB8701046D0 (en) * 1987-01-16 1987-02-18 Mackie & Sons Ltd J Production of textured yarn
US5054173A (en) * 1989-05-18 1991-10-08 Barmag Ag Method and apparatus for the enhanced crimping of multifilament yarn
RU2041981C1 (ru) * 1989-11-11 1995-08-20 Бармаг АГ Фильера для текстурирования синтетической нити

Also Published As

Publication number Publication date
DE59104693D1 (de) 1995-03-30
EP0488939A1 (fr) 1992-06-03
US5339502A (en) 1994-08-23
JPH04263635A (ja) 1992-09-18

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