EP0121602B1 - False-twister - Google Patents

False-twister Download PDF

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Publication number
EP0121602B1
EP0121602B1 EP83112879A EP83112879A EP0121602B1 EP 0121602 B1 EP0121602 B1 EP 0121602B1 EP 83112879 A EP83112879 A EP 83112879A EP 83112879 A EP83112879 A EP 83112879A EP 0121602 B1 EP0121602 B1 EP 0121602B1
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EP
European Patent Office
Prior art keywords
false twist
air
expansion chamber
twist unit
yarn
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
Application number
EP83112879A
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German (de)
French (fr)
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EP0121602A1 (en
Inventor
Emil Briner
Richard Hieronymi
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Priority to AT83112879T priority Critical patent/ATE20253T1/en
Publication of EP0121602A1 publication Critical patent/EP0121602A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
    • 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
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means

Definitions

  • the disadvantage now is that the amount of air sucked in through the throttle point is insufficient to achieve an optimal air speed in the intake duct for the spinning process.
  • the air speed of the air which is required to suck in edge fibers which are wound around the yarn core in this spinning process should advantageously be at least higher than the feed speed of the yarn core.
  • Spinning should be understood to mean the introduction of the untwisted fiber sliver emitted by the pair of output rollers into the swirl device during the starting process.
  • the advantage of the invention can be seen in the fact that the expansion of the air volume after the narrowest point reduces the air speed essentially such that there is practically no disruption of the yarn or The fiber run is created by air currents transverse to the yarn run, so that the piecing is advantageously carried out with active suction.
  • This advantage has an impact on piecing as well as in operation by reducing fiber loss.
  • the false twist unit 1 comprises a suction part 4, a throttle point 5 and a swirl sensor 6.
  • the throttle point 5 and the swirl sensor 6 essentially correspond to the embodiment described in DE-B-2722319 (equivalent to GB-A-1578256).
  • the actual spinning process itself is known from the aforementioned exit document.
  • a belt B delivered by the pair of output rollers 2 is taken over by a tapered suction channel 7 belonging to the suction part 4 and sucked through the throttle point 5 due to the suction effect of the swirl sensor 6, and on the one hand set in rotation by the air flow of the swirl sensor and on the other hand conveyed in the thread running direction R '. Due to the rotation, a false twist builds up against the pair of output rollers 2 in the yarn core of the yarn 3. The wrapping fibers necessary for the finished yarn are drawn in with the air flow of the suction channel 7.
  • annular expansion space 9 is provided, with an air outlet 10, which is connected to a vacuum source 11.
  • the throttle point 5 connects directly to this expansion space 9.
  • the input diameter hopper 12 is advantageously larger than the diameter of the narrowest point 8 in order to make it easier for the sucked-in yarn 3 to thread into the hopper 12.
  • the purge air inlet 13 is advantageously radially opposite the air outlet 10, so that two substantially symmetrical, semicircular air flows are aimed at the air outlet 10, which prevent fiber parts from becoming stuck in the expansion space.
  • the amount of purge air required for this is selected continuously or in stages by means of the adjustable throttle valve 14.
  • annular bead The advantage of this annular bead is that the two aforementioned air flows strive towards the air outlet 10 in a semi-annular manner and thereby less disruptive air flows directed perpendicular to the thread run can arise, since the air emerging at the narrowest point 8 is essentially circular in the expansion space 9 through an annular air passage cross section 17 resulting between the annular bead 15 and the wall 16 bordering the narrowest point 8 'flows.
  • the false twist unit 1 1v of FIG. 5 corresponds to the variant of Fig. 3 with the difference that the bead 15 projects so far into the wall 16, that an intermediate formed air passage cross-section 21 has a smaller area than the narrowest point 8.
  • the difference may be very small, it suffices that the air resistance of the cross section 21 is greater than that of the narrowest point 8.
  • This measure has the advantage that it increasingly counteracts the tendency of fiber deposits in the expansion spaces 9 I , 9 II , 9 III and 9 IV shown in FIGS. 3-6.
  • FIGS. 8 and 9 Another measure for reducing or avoiding fiber deposits in the expansion space 9 to 9 IV is shown for the expansion space 9 with FIGS. 8 and 9.
  • the measure consists in that, as shown with the false twist unit 1 VI , the expansion space 9 is arranged eccentrically to the Garnachse (not shown) or to the Garniauf 3, that even at the point with the smallest amount of air according to the direction of flow, a sufficiently high air speed results to avoid fiber deposits.
  • FIGS. 10 to 13 are intended to show that non-annular expansion spaces can also be used.
  • FIG. 10 respectively. 11 shows a false twist unit 1 v "with a cylindrical expansion space 24 and an air outlet 25 connected to it.
  • the expansion space can also have a square, possibly rectangular or other-cornered cross section.
  • FIG. 13 Another variant is shown in FIG. 13 with the false twist unit 1 VIII , in which an expansion space 26 is provided which, as can be seen from FIG. 13, has an oval cross section. An air outlet 27 connected to it serves as a connection piece to a suction unit (not shown).
  • the cross-section can be shaped such that the air inlet cross-section (not shown), which is traversed by the air flowing from the narrowest point 8 into the expansion space 26, in a manner and function is designed, as shown and described with FIGS. 3 to 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Detergent Compositions (AREA)
  • Air Supply (AREA)

Abstract

A false twist unit comprises a suction portion with a suction channel and with an expansion space connected at the throat portion or narrowest position of the suction channel, which expansion space is connected by means of an air connector or exit to a source of negative pressure. A throttle location connects the expansion space with a pneumatic twist imparting means. In the pneumatic false twist spinning process known from the German published Pat. No. 2,722,319 a sliver delivered from an exit roller pair of a drafting mechanism is forwarded through the suction channel in a predetermined direction and thereafter through the throttle location into the twist imparting means. The twist imparting means produces in the core of the yarn or thread a false twist which builds up in such yarn or thread towards the exit roller pair. The wrapping fibers required for the finished yarn or thread are sucked in as edge fibers through the suction channel simultaneously with the yarn core. By means of the expansion space the advantage is obtained that the air flow can be sucked away without substantial disturbance to the yarn travel path in a direction substantially at right angles to such yarn travel path.

Description

Die Erfindung betrifft eine Falschdralleinheit, insbesondere zum Falschdrallspinnen, mit einem einen verjüngten Ansaugkanal umfassenden Ansaugteil und eine, in Fadenlaufrichtung gesehen, darauf folgende Drosselstelle sowie einen dem Ansaugteil anschliessenden Drallgeber.The invention relates to a false twist unit, in particular for false twist spinning, with an intake part comprising a tapered intake channel and a throttle point following it, viewed in the thread running direction, and a swirl sensor adjoining the intake part.

Aus der CH-A-617465 ist eine Falschdralleinheit der vorgenannten Art bekannt, mit der von einem Streckwerk zugelieferte Fasern zu einem Garn versponnen werden. Beim Drallgeber handelt es sich um eine pneumatische Falschdralldüse, mit welcher einerseits dem Garn ein Drall erteilt und anderseits Luft durch den Ansaugkanal gesaugt wird.From CH-A-617465 a false twist unit of the aforementioned type is known, with which fibers supplied by a drafting device are spun into a yarn. The twister is a pneumatic false twist nozzle, which on the one hand gives the yarn a twist and on the other hand draws air through the intake duct.

Der Nachteil besteht nun darin, dass die durch die Drosselstelle angesaugte Luftmenge ungenügend ist, um im Ansaugkanal eine für den Spinnvorgang optimale Luftgeschwindigkeit zu erreichen. Die Luftgeschwindigkeit derjenigen Luft, die benötigt wird, um Randfasern, die in diesem Spinnverfahren um den Garnkern gewunden werden, anzusaugen, sollte vorteilhafterweise im mindesten höher sein als die Vorschubgeschwindigkeit des Garnkerns.The disadvantage now is that the amount of air sucked in through the throttle point is insufficient to achieve an optimal air speed in the intake duct for the spinning process. The air speed of the air which is required to suck in edge fibers which are wound around the yarn core in this spinning process should advantageously be at least higher than the feed speed of the yarn core.

Im weiteren ist aus der CH-A-572113 eine Vorrichttung zum Falschdrallspinnen bekannt, bei welcher ein von einem Drallgeber, in Fadenlaufrichtung gesehen, angeordneter Ansaugteil mit einem Ansaugkanal und einem im rechten Winkel dazu angeordneten Absaugrohr von ca. gleichem Durchmesser vorgesehen ist.Furthermore, from CH-A-572113 a device for false twist spinning is known, in which a suction part arranged by a swirl device, viewed in the thread running direction, is provided with an suction channel and a suction pipe of approximately the same diameter arranged at right angles thereto.

Der Nachteil dieser Vorrichtung liegt bei genügender Ansaugluftmenge darin, dass infolge der starken Auslenkung der Luftströmung aus dem Fadenlauf das Ansaugen für das Anspinnen unterbrochen werden muss, was das Anspinnen entsprechend erschwert.The disadvantage of this device, with a sufficient amount of intake air, is that due to the strong deflection of the air flow from the thread path, the intake for piecing has to be interrupted, which makes piecing correspondingly difficult.

Unter Anspinnen soll das beim Startvorgang notwendige Einführen des vom Ausgangswalzenpaar abgegebenen unverdrehten Faserbandes in den Drallgeber verstanden werden.Spinning should be understood to mean the introduction of the untwisted fiber sliver emitted by the pair of output rollers into the swirl device during the starting process.

Es ist deshalb Aufgabe der Erfindung, eine Luftansaugung zu schaffen, welche eine genügend hohe Luftgeschwindigkeit im Ansaugkanal erzeugt und andererseits die Trennung des Luftstromes vom Garn problemlos ermöglicht.It is therefore an object of the invention to provide an air intake which generates a sufficiently high air speed in the intake duct and, on the other hand, enables the air flow to be separated from the yarn without problems.

Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass der Ansaugteil im weiteren einen ringförmigen Expansionsraum umfasst, der im Anschluss an den Ansaugkanal und vor der Drosselstelle vorgesehen ist, so dass der Ansaugkanal mit seiner engsten Stelle in den Expansionsraum mündet und dass der Expansionsraum mittels eines Luftauslasses an einer Unterdruckquelle angeschlossen ist. Die weiteren vorteilhaften Ausführungsformen sind in den weiteren Ansprüchen aufgeführt.According to the invention, the object is achieved in that the intake part further comprises an annular expansion space which is provided in connection with the intake duct and in front of the throttle point, so that the intake duct opens into the expansion space with its narrowest point and that the expansion space is connected by means of an air outlet a vacuum source is connected. The further advantageous embodiments are listed in the further claims.

Der Vorteil der Erfindung ist darin zu sehen, dass durch die Expansion des Luftvolumens nach der engsten Stelle die Luftgeschwindigkeit im wesentlichen derart abnimmt, dass dadurch praktisch keine Störung des Garn- resp. Faserlaufes durch Luftströmungen quer zum Garnlauf entsteht, so dass das Anspinnen vorteilhafterweise bei tätiger Absaugung durchgeführt wird. Dieser Vorteil wirkt sich beim Anspinnen wie auch im Betrieb aus, indem dadurch weniger Faserverlust entsteht.The advantage of the invention can be seen in the fact that the expansion of the air volume after the narrowest point reduces the air speed essentially such that there is practically no disruption of the yarn or The fiber run is created by air currents transverse to the yarn run, so that the piecing is advantageously carried out with active suction. This advantage has an impact on piecing as well as in operation by reducing fiber loss.

Die vorteilhafterweise exzentrische Anordnung der Ringkammer und/oder Verwendung zusätzlicher Spülluft bringen den Vorteil, dass weniger Gefahr von Faserablagerungen im Expansionsraum entsteht.The advantageously eccentric arrangement of the annular chamber and / or the use of additional purge air have the advantage that there is less risk of fiber deposits in the expansion space.

Im folgenden wird die Erfindung anhand von lediglich Ausführungswege darstellenden Zeichnungen näher erläutert. Es zeigt:

  • Fig. 1 einen Längsschnitt der erfindungsgemässen Falschdralleinheit im Anschluss an ein Streckwerk, halbschematisch dargestellt,
  • Fig. 2-6 je eine Variante der Falschdralleinheit von Fig. 1,
  • Fig. 7 einen Querschnitt der Falschdralleinheit von Fig. 6, gemäss I-I,
  • Fig. 8 eine Variante der Falschdralleinheit von Fig. 1 oder 2,
  • Fig.9 einen G rundriss der Falschdralleinheitvon Fig. 8 im Schnitt entlang II-II,
  • Fig. 10 eine Variante der Falschdralleinheiten von Fig. 1 bis 9,
  • Fig. 11 einen Schnitt der Falschdralleinheit von Fig. 10, entlang der Linie III-III,
  • Fig. 12 eine weitere Variante der Falschdralleinheiten von Fig. 1 bis 9, halbschematisch dargestellt,
  • Fig. 13 einen Schnitt der Falschdralleinheit von Fig. 12, entlang der Linie IV-IV.
In the following, the invention is explained in more detail with the aid of drawings which only show execution routes. It shows:
  • 1 shows a longitudinal section of the false twist unit according to the invention following a drafting system, shown semi-schematically,
  • 2-6 each a variant of the false twist unit of Fig. 1,
  • 7 shows a cross section of the false twist unit of FIG. 6, according to II,
  • 8 shows a variant of the false twist unit of FIG. 1 or 2,
  • Fig. 9 is a plan view of the false twist unit of Fig. 8 in section along II-II,
  • 10 shows a variant of the false twist units of FIGS. 1 to 9,
  • 11 shows a section of the false twist unit of FIG. 10, along the line III-III,
  • 12 shows a further variant of the false twist units from FIGS. 1 to 9, shown semi-schematically,
  • Fig. 13 is a section of the false twist unit of Fig. 12, along the line IV-IV.

Eine Falschdralleinheit 1 ist einem Ausgangswalzenpaar 2 eines Streckwerkes (nicht gezeigt} in Laufrichtung (R) des Garnes 3 gesehen, nachgeschaltet.A false twist unit 1 is connected downstream of an output roller pair 2 of a drafting arrangement (not shown} in the running direction (R) of the yarn 3.

Die Falschdralleinheit 1 umfasst einen Ansaugteil 4, eine Drosselstelle 5 und einen Drallgeber 6. Die Drosselstelle 5 und der Drallgeber 6 entsprechen im wesentlichen der in der DE-B-2722319 (aequivalent zu GB-A-1578256) beschriebenen Ausführung. Das eigentliche Spinnverfahren an sich ist aus der vorgenannten Ausiegechrift bekannt. Darin wird ein vom Ausgangswalzenpaar 2 abgeliefertes Band B von einem zum Ansaugteil 4 gehörenden verjüngten Ansaugkanal 7 übernommen und infolge der Saugwirkung des Drallgebers 6 durch die Drosselstelle 5 gesaugt, sowie vom Luftstrom des Drallgebers einerseits in Drehung versetzt und andererseits in Fadenlaufrichtung R' gefördert. Durch die Drehung entsteht ein sich gegen das Ausgangswalzenpaar 2 aufbauender Falschdrall im Garnkern des Garnes 3. Die für das fertige Garn notwendigen Umwindefasern werden mit dem Luftstrom des Ansaugkanals 7 angesaugt.The false twist unit 1 comprises a suction part 4, a throttle point 5 and a swirl sensor 6. The throttle point 5 and the swirl sensor 6 essentially correspond to the embodiment described in DE-B-2722319 (equivalent to GB-A-1578256). The actual spinning process itself is known from the aforementioned exit document. In it, a belt B delivered by the pair of output rollers 2 is taken over by a tapered suction channel 7 belonging to the suction part 4 and sucked through the throttle point 5 due to the suction effect of the swirl sensor 6, and on the one hand set in rotation by the air flow of the swirl sensor and on the other hand conveyed in the thread running direction R '. Due to the rotation, a false twist builds up against the pair of output rollers 2 in the yarn core of the yarn 3. The wrapping fibers necessary for the finished yarn are drawn in with the air flow of the suction channel 7.

Im Anschluss an die engste Stelle 8 des Ansaugkanals 7 ist ein ringförmiger Expansionsraum 9 vorgesehen, mit einem Luftauslass 10, der an eine Unterdruckquelle 11 angeschlossen ist. Die Drosselstelle 5 schliesst unmittelbar an diesen Expansionsraum 9 an.Following the narrowest point 8 of the intake duct 7, an annular expansion space 9 is provided, with an air outlet 10, which is connected to a vacuum source 11. The throttle point 5 connects directly to this expansion space 9.

Der Expansionsraum ist derart dimensioniert, dass die durch die engste Stelle 8 in diesen Expansionsraum 9 austretende Luft derart beruhigt und abgesaugt wird, dass keine wesentliche Störung resp. Abdrift des Garnes 3 und deren Umwindefasern in Richtung Luftauslass entsteht.The expansion space is dimensioned such that the air emerging through the narrowest point 8 into this expansion space 9 soothes and is suctioned off that no significant disruption or Drift of the yarn 3 and its wrapping fibers in the direction of the air outlet occurs.

In den mit den Figuren 2 bis 6 sowie 8, 10 und 12 gezeigten Varianten sind die mit der Figur 1 identischen Elemente mit gleichen Bezugszeichen gekennzeichnet.In the variants shown with FIGS. 2 to 6 and 8, 10 and 12, the elements that are identical to FIG. 1 are identified by the same reference numerals.

Fig. 2 zeigt eine Falschdralleinheit 1' entsprechend der Falschdralleinheit 1, jedoch zusätzlich mit einem der Drosselstelle 5 vorgeschalteten Trichter 12 und einem Spüllufteinlass 13, der mit einem einstellbaren Drosselventil 14 verbunden ist. Der Eingangsdurchmesser-Trichter 12 ist dabei vorteilhafterweise grösser als der Durchmesser der engsten Stelle 8, um dem angesaugten Garn 3 das Einfädeln in den Trichter 12 zu erleichtern.2 shows a false twist unit 1 'corresponding to the false twist unit 1, but additionally with a funnel 12 upstream of the throttle point 5 and a purge air inlet 13 which is connected to an adjustable throttle valve 14. The input diameter hopper 12 is advantageously larger than the diameter of the narrowest point 8 in order to make it easier for the sucked-in yarn 3 to thread into the hopper 12.

Der Spüllufteinlass 13 ist vorteilhafterweise dem Luftauslass 10 radial gegenübergesetzt, so dass zwei im wesentlichen symmetrische, halbkreisförmige, dem Luftauslass 10 zustrebende Luftströmungen entstehen, die ein Festsetzen von Faserteilen im Expansionsraum vermeiden. Die hierzu notwendige Spülluftmenge wird mittels dem einstellbaren Drosselventil 14 stufenlos oder in Stufen gewählt.The purge air inlet 13 is advantageously radially opposite the air outlet 10, so that two substantially symmetrical, semicircular air flows are aimed at the air outlet 10, which prevent fiber parts from becoming stuck in the expansion space. The amount of purge air required for this is selected continuously or in stages by means of the adjustable throttle valve 14.

Die Spülluft kann auch intermittierend dem Expansionsraum zugeführt werden. Im weiteren kann die Spülluft aus dem Spinnbereich angesaugt oder als Druckluft zugeführt und gegebenenfalls klimatisiert werden. Fig. 3 zeigt eine Falschdralleinheit 1" entsprechend der Falschdralleinheit 1', jedoch mit einem Expansionsraum 9', in welchen ein den Trichter 12 bildender Ringwulst 15 hineinragt. Der Vorteil dieses Ringwulstes liegt darin, dass die beiden vorgenannten Luftströmungen betonter halbringförmig dem Luftauslass 10 zustreben und dadurch weniger störende, zum Fadenlauf senkrecht gerichtete Luftströmungen entstehen können, da die an der engsten Stelle 8 austretende Luft im wesentlichen kreisförmig durch einen sich zwischen dem Ringwulst 15 und der an die engste Stelle 8 grenzende Wand 16 ergebenden ringförmigen Luftdurchtrittsquerschnitt 17 in den Expansionsraum 9' strömt.The purge air can also be supplied to the expansion space intermittently. Furthermore, the purge air can be drawn in from the spinning area or supplied as compressed air and, if necessary, air-conditioned. 3 shows a false twist unit 1 "corresponding to the false twist unit 1 ', but with an expansion space 9' into which an annular bead 15 forming the funnel 12 protrudes. The advantage of this annular bead is that the two aforementioned air flows strive towards the air outlet 10 in a semi-annular manner and thereby less disruptive air flows directed perpendicular to the thread run can arise, since the air emerging at the narrowest point 8 is essentially circular in the expansion space 9 through an annular air passage cross section 17 resulting between the annular bead 15 and the wall 16 bordering the narrowest point 8 'flows.

Fig. 4 zeigt eine weitere Variante einer Falschdralleinheit 1 "', bei welcher die aus der engsten Stelle 8 austretende Luft, im Vergleich zur Variante von Fig. 3, zusätzlich noch weiter umgelenkt wird, bevor sie in den Expansionsraum 9" gelangt. Diese Umlenkung ergibt sich durch einen die engste Stelle 8 ergebenden konischen Fortsatz 18, der in einen Trichter 12' hineinragt und dadurch einen konischen Ringspalt 19 bildet. Der Trichter wird mindestens teilweise durch einen in den Expansionsraum 9' ragenden Wulst 20 gebildet. Diese Umlenkung vermindert, im Vergleich zur Variante von Fig. 3 zusätzlich die schädlichen, den Fadenlauf durchquerenden Strömungen.FIG. 4 shows a further variant of a false twist unit 1 "', in which the air emerging from the narrowest point 8 is additionally deflected further, in comparison to the variant from FIG. 3, before it reaches the expansion space 9". This deflection results from a conical extension 18 which results in the narrowest point 8, which projects into a funnel 12 'and thereby forms a conical annular gap 19. The funnel is at least partially formed by a bead 20 projecting into the expansion space 9 '. This deflection also reduces, compared to the variant in FIG. 3, the harmful currents crossing the thread course.

Die Falschdralleinheit 11v von Fig. 5 entspricht der Variante von Fig. 3 mit dem Unterschied, dass der Wulst 15 so weit gegen die Wand 16 ragt, dass ein dazwischen gebildeter Luftdurchtrittsquerschnitt 21 eine kleinere Fläche aufweist als die engste Stelle 8. Die Differenz kann sehr klein sein, es genügt, dass der Luftwiderstand des Querschnittes 21 grösser ist als derjenige der engsten Stelle 8.The false twist unit 1 1v of FIG. 5 corresponds to the variant of Fig. 3 with the difference that the bead 15 projects so far into the wall 16, that an intermediate formed air passage cross-section 21 has a smaller area than the narrowest point 8. The difference may be very small, it suffices that the air resistance of the cross section 21 is greater than that of the narrowest point 8.

Ist die Fläche des Ringspaltes wesentlich kleiner als die engste Stelle 8, so werden störende Querströmungen zum Garnlauf vermieden.If the area of the annular gap is significantly smaller than the narrowest point 8, then disruptive cross flows to the yarn run are avoided.

Fig. 6 zeigt eine weitere Ausbildung der Variante von Fig. 4, mit einem gegenüber dem Expansionsraum 9" überhöhten Expansionsraum 91v, in dem ein tangentialer Lufteinlass 22 im Bereich des Wulstes 20 und ein tangentialer Luftauslass 23, in dem, in axialer Richtung der Flaschdralleinheit gesehen, dem Wulstbereich gegenüberliegenden Bereich des Expansionsraumes 9IV vorgesehen ist. Lufteinlass 22 und Luftauslass 23 sind dabei derart angeordnet, dass die am Lufteinlass 22 eintretende Spülluft auf spiralförmiger Bahn gegen den Luftauslass 23 strebt und dabei die durch den Ringspalt 19 eintretende Luft zusätzlich in derselben Richtung wie das Kerngarn in Rotation versetzt. Eine gewisse Rotation erfährt die Ansaugluft bereits durch die Rotation des Kerngarnes.Fig. 6 shows a further embodiment of the variant of FIG. 4, with an expansion space 9 1v which is excessive compared to the expansion space 9 ", in which a tangential air inlet 22 in the region of the bead 20 and a tangential air outlet 23, in which, in the axial direction As seen in the bottle swirl unit, the area of the expansion space 9 IV opposite the bead area is provided rotated in the same direction as the core yarn. The intake air already experiences a certain rotation through the rotation of the core yarn.

Diese Massnahme hat den Vorteil, dass sie der Tendenz von Faserablagerungen in den mit den Fig. 3-6 gezeigten Expansionsräumen 9I, 9II, 9III und 9IV vermehrt entgegenwirkt.This measure has the advantage that it increasingly counteracts the tendency of fiber deposits in the expansion spaces 9 I , 9 II , 9 III and 9 IV shown in FIGS. 3-6.

Eine weitere Massnahme zur Reduktion oder Vermeidung von Faserablagerungen im Expansionsraum 9 bis 9IV ist für den Expansionsraum 9 mit den Fig. 8 und 9 dargestellt.Another measure for reducing or avoiding fiber deposits in the expansion space 9 to 9 IV is shown for the expansion space 9 with FIGS. 8 and 9.

Die Massnahme besteht darin, dass, wie mit der Falschdralleinheit 1VI gezeigt, der Expansionsraum 9 derart exzentrisch zur Garnachse (nicht gezeigt) oder zum Garniauf 3 angeordnet ist, dass auch an der Stelle mit der entsprechend der Strömungsrichtung kleinsten Luftmenge noch eine genügend hohe Luftgeschwindigkeit resultiert, um Faserablagerungen zu vermeiden.The measure consists in that, as shown with the false twist unit 1 VI , the expansion space 9 is arranged eccentrically to the Garnachse (not shown) or to the Garniauf 3, that even at the point with the smallest amount of air according to the direction of flow, a sufficiently high air speed results to avoid fiber deposits.

Im weiteren soll mit den Fig. 10 bis 13 gezeigt werden, dass auch nicht-ringförmige Expansionsräume verwendet werden können.Furthermore, FIGS. 10 to 13 are intended to show that non-annular expansion spaces can also be used.

In diesen Figuren sind bisher gezeigte Elemente mit den bisherigen Kennzeichen bezeichnet.In these figures, elements previously shown are identified by the previous characteristics.

Fig. 10 resp. 11 zeigt eine Falschdralleinheit 1 v" mit einem zylindrischen Expansionsraum 24 und einem daran angeschlossenen Luftauslass 25.Fig. 10 respectively. 11 shows a false twist unit 1 v "with a cylindrical expansion space 24 and an air outlet 25 connected to it.

Der Expansionsraum kann jedoch auch, wie in Fig. 11 mit strichpunktierten Linien angedeutet, einen quadratischen, gegebenenfalls recht- oder anderseckigen Querschnitt aufweisen.However, as indicated in FIG. 11 with dash-dotted lines, the expansion space can also have a square, possibly rectangular or other-cornered cross section.

Eine weitere Variante zeigt Fig. 12 resp. 13 mit der Falschdralleinheit 1VIII, in welcher ein Expansionsraum 26 vorgesehen ist, der, wie aus Fig. 13 ersichtlich, einen ovalen Querschnitt aufweist. Ein daran angeschlossener Luftauslass 27 dient als Verbindungsstück zu einer Absaugeinheit (nicht gezeigt).Another variant is shown in FIG. 13 with the false twist unit 1 VIII , in which an expansion space 26 is provided which, as can be seen from FIG. 13, has an oval cross section. An air outlet 27 connected to it serves as a connection piece to a suction unit (not shown).

Anstelle eines ovalen Querschnittes kann, wie in Fig. 13 mit strichpunktierten Linien angedeutet, der Querschnitt so geformt sein, dass der Lufteintrittsquerschnitt (nicht gezeigt), welcher von der von der engsten Stelle 8 in den Expansionsraum 26 strömenden Luft durchquert wird, in einer Art und Funktion gestaltet wird, wie dies mit den Fig. 3 bis 6 gezeigt und beschrieben ist.Instead of an oval cross-section, as indicated in FIG. 13 with dash-dotted lines, the cross-section can be shaped such that the air inlet cross-section (not shown), which is traversed by the air flowing from the narrowest point 8 into the expansion space 26, in a manner and function is designed, as shown and described with FIGS. 3 to 6.

Der Vorteil der nicht-ringförmigen Querschnitte besteht darin, dass dadurch der Expansionsraum in die volle, d. h. nicht in zwei Teile getrennte Falschdralleinheit hinein bearbeitet werden kann.The advantage of the non-annular cross-sections is that it allows the expansion space in the full, ie. H. the false twist unit cannot be machined into two parts.

Claims (12)

1. False twist unit (1), especially for false twist spinning, with a suction portion (4) comprising a converging suction passage (7) and a throttle position (5) downstream therefrom considered in the thread movement direction (R), together with a twist imparting member (6) following the suction portion (4), characterised in that the suction portion (4) further comprises an expansion chamber (9), which is provided following the suction passage (7) and before the throttle position (5), so that the suction passage (7) opens at its narrowest position (8) into the expansion chamber and the expansion chamber (9) is connected by means of an air outlet (10) to a source of underpressure (11).
2. False twist unit according to claim 1 characterised in that the expansion chamber (9) is connected, as viewed in the thread movement direction (5), to a funnel (12) the outlet of which forms the throttle position (5) and the infeed opening of which corresponds at least to the narrowest position (8) of the suction passage (7).
3. False twist unit according to claim 1 characterised in that the expansion chamber (9) also has an air inlet opening (13).
4. False twist unit according to claim 1 characterised in that the expansion chamber (9) is ring-shaped.
5. False twist unit according to claim 2 and 4 characterised in that a ringprotusion (15), which forms the funnel (12), projects into the expansion chamber and thereby a cylindrical/ring-shaped air throughflow section (17) is formed.
6. False twist unit according to claim 2 and 4 characterised in that an extension (18) containing the narrowest position (8) projects into the funnel (121) and thereby a conical/ring-shaped air throughflow section (19) is formed.
7. False twist unit according to claim 5 and 6 characterised in that the narrowest position (8) and the air throughflow section (17, 19) are so formed that the air resistance of the narrowest position (8) is less than the air resistance of the air throughflow section (17, 19).
8. False twist unit according to claim 1,3 and 4 characterised in that the air inlet opening (13) and outlet (10) are so arranged that the air in the expansion chamber (9Iv) is set in rotation about the axis of the yarn (3).
9. False twist unit according to claim 1 and 3 characterised in that the air inlet opening (13) and the air connection (10) are arranged in two imaginary planes which are separate from each other and disposed at right angles to the yarn axis.
10. False twist unit to claim 3 characterised in that the air inlet opening (13) is combined with a throttle valve (14).
11. False twist unit according to claim 1-10 characterised in that the expansion chamber (9-9'v) is arranged excentrically to the yarn axis in such manner that the speed of the air flow in the expansion chamber, in the direction of the air outlet (10), remains substantially constant.
12. False twist unit according to claim 1 characterised in that the expansion chamber (24, 26) is not ring-shaped.
EP83112879A 1983-04-12 1983-12-21 False-twister Expired EP0121602B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112879T ATE20253T1 (en) 1983-04-12 1983-12-21 FALSE SPIN UNIT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH196183 1983-04-12
CH1961/83 1983-04-12

Publications (2)

Publication Number Publication Date
EP0121602A1 EP0121602A1 (en) 1984-10-17
EP0121602B1 true EP0121602B1 (en) 1986-06-04

Family

ID=4222649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112879A Expired EP0121602B1 (en) 1983-04-12 1983-12-21 False-twister

Country Status (7)

Country Link
US (1) US4509322A (en)
EP (1) EP0121602B1 (en)
JP (1) JPS59199825A (en)
KR (1) KR910006404B1 (en)
AT (1) ATE20253T1 (en)
DE (1) DE3363972D1 (en)
IN (1) IN162582B (en)

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US5392588A (en) * 1982-06-07 1995-02-28 Burlington Industries, Inc. Spinning with hollow rotatable shaft and air flow
US4719744A (en) * 1982-06-07 1988-01-19 Burlington Industries, Inc. Vacuum spinning method
GB8421020D0 (en) * 1984-08-17 1984-09-19 Carding Spec Canada Handling silver
US5103626A (en) * 1984-12-03 1992-04-14 Burlington Industries, Inc. Fasciated yarn structure made by vacuum spinning
BG41935A1 (en) * 1985-05-07 1987-09-15 Bakhov Air eddy nozzle for spinning of staple fibre yarn
DE3631400A1 (en) * 1986-09-16 1988-03-17 Fritz Stahlecker METHOD AND DEVICE FOR PNEUMATIC SPIRAL SPINNING
DE3634557A1 (en) * 1986-10-10 1988-04-14 Fritz Stahlecker DEVICE FOR PNEUMATIC SPIRAL SPINNING
DE3706728A1 (en) * 1987-03-02 1988-09-15 Schubert & Salzer Maschinen METHOD AND DEVICE FOR TENSIONING A SPINNING DEVICE WORKING WITH A PNEUMATIC TWIST ORGAN
IN171023B (en) * 1987-04-29 1992-07-04 Rieter Ag Maschf
CH676725A5 (en) * 1988-11-07 1991-02-28 Rieter Ag Maschf
CA2005018A1 (en) * 1988-12-12 1990-06-12 Elbert F. Morrison Vacuum spinning of roving
US5237810A (en) * 1989-09-01 1993-08-24 Maschinenfabrik Rieter Ag Method and apparatus for false twist spinning
US5775079A (en) * 1997-04-21 1998-07-07 American Linc Corporation Apparatus for imparting virtual twist to strand material and method of imparting same
US6449938B1 (en) 2000-05-24 2002-09-17 Goulston Technologies, Inc. Advanced finish nozzle system
CH712489A1 (en) 2016-05-26 2017-11-30 Rieter Ag Maschf Garnbildungselement for a roving and equipped therewith roving.

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DE1130339B (en) * 1958-12-12 1962-05-24 Konrad Goetzfried Method and device for the pneumatic spinning of a thread
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JPS51130334A (en) * 1975-05-06 1976-11-12 Murata Machinery Ltd Apparatus for making spun yarns
JPS52107349A (en) * 1976-03-04 1977-09-08 Murata Machinery Ltd Spun yarn and method of producing same
DE2722319B2 (en) * 1977-01-10 1981-01-15 Toyo Boseki K.K., Osaka (Japan) Device for pneumatic false twist spinning
GB1578256A (en) * 1977-05-10 1980-11-05 Toyo Boseki Method and apparatus for false twisting fibres using fluid
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JPS5860029A (en) * 1981-10-07 1983-04-09 Toyoda Autom Loom Works Ltd False-twisting air nozzle
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JPS58104231A (en) * 1981-12-15 1983-06-21 Toyoda Autom Loom Works Ltd False-twisting nozzle for bundle spinning
JPS58115130A (en) * 1981-12-25 1983-07-08 Toyoda Autom Loom Works Ltd False-twisting nozzle
JPS58115125A (en) * 1981-12-29 1983-07-08 Toyoda Autom Loom Works Ltd False twisting nozzle for wrap spinning
DE3301652A1 (en) * 1982-01-20 1983-07-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi FALSE WIRE AIR NOZZLE

Also Published As

Publication number Publication date
ATE20253T1 (en) 1986-06-15
EP0121602A1 (en) 1984-10-17
JPS59199825A (en) 1984-11-13
IN162582B (en) 1988-06-11
JPS618161B2 (en) 1986-03-12
KR910006404B1 (en) 1991-08-21
DE3363972D1 (en) 1986-07-10
KR840008393A (en) 1984-12-14
US4509322A (en) 1985-04-09

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