WO2005040466A1 - Device for the production of a spun thread from a staple fibre composite - Google Patents

Device for the production of a spun thread from a staple fibre composite Download PDF

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Publication number
WO2005040466A1
WO2005040466A1 PCT/EP2004/008966 EP2004008966W WO2005040466A1 WO 2005040466 A1 WO2005040466 A1 WO 2005040466A1 EP 2004008966 W EP2004008966 W EP 2004008966W WO 2005040466 A1 WO2005040466 A1 WO 2005040466A1
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WIPO (PCT)
Prior art keywords
compressed air
channel
inlet opening
thread
guide surface
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Application number
PCT/EP2004/008966
Other languages
German (de)
French (fr)
Inventor
Gerd Stahlecker
Original Assignee
Maschinenfabrik Rieter Ag
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Filing date
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Application filed by Maschinenfabrik Rieter Ag filed Critical Maschinenfabrik Rieter Ag
Publication of WO2005040466A1 publication Critical patent/WO2005040466A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/002—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing for false-twisting spinning machines

Definitions

  • the invention relates to a device for producing a spun thread from a staple fiber band, with a feed channel for feeding the staple fiber bandage, with a thread take-off channel having an inlet opening, which is arranged in a spindle-shaped component, with a swirl chamber connected to compressed air nozzles for generating a vortex flow around the inlet opening of the thread take-off duct, with an exhaust air duct surrounding the spindle-shaped component and with a fiber guide surface which acts as a twist lock and is arranged in the region of the inlet opening of the thread take-off duct, the compressed air emerging from the compressed air nozzles being switched off after an interruption of the spinning process and the spindle-shaped component being moved away from the fiber guide surface in the axial direction becomes.
  • a device of this type is state of the art through DE 195 01 545 C2.
  • a staple fiber dressing is drawn into a fiber ribbon in the drafting system, which is then given the spinning twist in an air nozzle unit.
  • the fiber ribbon is first passed through a feed channel of the air nozzle unit into a swirl chamber, which is assigned a fluid device for generating a swirl flow around an inlet opening of a thread take-off channel.
  • a swirl chamber which is assigned a fluid device for generating a swirl flow around an inlet opening of a thread take-off channel.
  • the front ends of the fibers held in the fiber ribbon are guided into the thread take-off channel, while the rear ends are free
  • the fiber ends are spread apart, caught by the vortex flow and rotated around the front ends that are already in the inlet opening of the thread take-off channel, that is to say incorporated, so that a thread with largely real rotation is produced.
  • the known device provides that after an interruption of the spinning process, the compressed air emerging from the compressed air nozzles is switched off and the spindle-shaped component is moved away from the fiber guide surface.
  • the area between the fiber guide surface and the inlet opening of the thread take-off channel because with the small distance that the inlet opening is in operation from the fiber guide surface, it often happens that a fiber or thread ball occurs when the thread breaks stuck in the narrow gap.
  • the removal of the thread take-off channel from the fiber guiding surface is very complex since the components mentioned are located in different housings which must be completely separated from one another if the spinning process is interrupted. The control for the separation of these housings takes place via an external mechanism.
  • the invention is based on the object of being able to clean the very narrow gap between the fiber guide surface and the inlet opening of the thread take-off channel when the spinning process is interrupted, without having to separate different housings from one another in a complex manner by external mechanisms.
  • the spindle-shaped component is partially designed as a piston of a piston-cylinder unit, which, when the compressed air is switched on, is pressed into an operating position in which the fiber guide surface lies in the region of the inlet opening of the thread take-off channel, and when the compressed air is switched off into a Is moved out of operation position, in which the inlet opening of the thread take-off channel is at an increased distance from the fiber guide surface.
  • a compression spring acts on the piston, which is tensioned when the compressed air is switched on and presses the piston into its non-operating position when the compressed air is switched off.
  • the compressed air supply for the compressed air nozzles is provided with a branch which is assigned to the piston-cylinder unit.
  • the spindle-shaped component is designed like a pneumatic piston, an overpressure can be applied to the spindle-shaped component during the spinning process and pressed into the spinning position and, in the event of thread breakage and a lack of excess pressure, being pressed away from the fiber guide element by means of a spring. Any fiber or thread balls in the area of the fiber guide surface can then easily, for example by blowing compressed air into the feed channel, because of the significantly increased distance from the inlet opening of the thread take-off channel removed and disposed of by the negative pressure of the exhaust air duct. No housings can be separated from each other for this, but the piston-cylinder unit is located completely inside the air nozzle unit. Furthermore, no external mechanism for operating these non-existent separable housings is required.
  • FIG. 1 shows a greatly enlarged illustration of a device according to the invention in axial section during operation
  • Figure 2 shows the same device in the same view in the non-operating state.
  • the device shown in FIG. 1 is used to produce a spun thread 1 from a staple fiber dressing 2.
  • the essential components include a drafting device 3 and an air nozzle unit 4.
  • the staple fiber structure 2 to be spun is fed to the drafting device 3 in the direction of delivery A and drawn off as spun thread 1 in the direction of take-off B and passed on to a winding device (not shown).
  • the drafting system 3 which is only partially shown, is preferably a three-cylinder drafting system and thus contains a total of three pairs of rollers, each of which contains a driven lower roller and an upper roller designed as a pressure roller. Only the delivery roller pair 5, 6 is shown.
  • a staple fiber structure 2 is warped in a known manner to a desired fineness. Following the drafting unit 3, there is then a thin fiber ribbon 7, which is stretched and still untwisted.
  • the fiber ribbon 7 is fed to the air nozzle unit 4 via a feed channel 8.
  • a so-called swirl chamber 9 follows, in which the fiber ribbon 7 is given the spinning twist, so that the spun thread 1 is produced, which is drawn off through a thread take-off channel 10.
  • a fluid device generates a vortex flow in the vortex chamber 9 by blowing compressed air through tangential air nozzles 11 opening tangentially into the vortex chamber 9.
  • the compressed air emerging from the nozzle openings is discharged through an exhaust air duct 12 has an annular cross section around a spindle-shaped component 13 which is stationary during operation and which contains the thread take-off channel 10.
  • an edge of a fiber guide surface 14 is arranged as a twist lock, which is arranged slightly eccentrically to the thread take-off channel 10 in the area of its inlet opening 15.
  • the fibers to be spun are held on the one hand in the fiber ribbon 7 and thus guided from the feed channel 8 into the thread take-off channel 10 essentially without giving rotation, but on the other hand the fibers in the area between the feed channel 8 and the thread take-off channel 10 are exposed to the effect of the vortex flow.
  • the fibers or at least their end regions are driven radially away from the inlet opening 15 of the thread take-off channel 10.
  • the threads 1 produced with the described device thereby show a core of fibers or fiber regions running essentially in the longitudinal direction of the thread without substantial rotation and an outer region in which the fibers or fiber regions are rotated around the core.
  • a device of this type allows very high spinning speeds, which can be in the order of 600 m / min.
  • the compressed air emerging from the compressed air nozzles 11 into the swirl chamber 9 is passed to the air nozzle assembly 4 via a compressed air duct 16 in the feed direction C. From the compressed air duct 16, the compressed air first arrives in an annular duct 17 surrounding the swirl chamber 9, to which said compressed air nozzles 11 are directly connected.
  • the spindle-shaped component 13 is arranged to be displaceable in the axial direction.
  • the spindle-shaped component 13 is partially designed as a piston 18 of a piston-cylinder unit 19.
  • the latter works with compressed air, for which purpose the compressed air duct 16 is provided with a branch 20, which opens into a pressure chamber 22 via a connecting duct 21.
  • This pressure chamber 22 is provided with a plus sign in FIG. 1 and is located on that side of the piston 18 which faces away from the inlet opening 15 of the thread take-off channel 10.
  • the exhaust air duct 12 is provided with a minus sign in order to make it clear that there is a negative pressure area here.
  • the overpressure in the overpressure chamber 22 presses the piston 18 and the component 13 firmly connected to it against a stop 23 during operation. As a result, under the effect of the overpressure, the small distance xi between the fiber guide surface 14 and the inlet opening 15 of the thread take-off channel 10 is fixed during operation.
  • the spindle-shaped component 13 is thus moved away from the fiber guide surface 14 in the axial direction when the spinning process is interrupted.
  • the piston 18 reaches the stop 25
  • the inlet opening 15 of the thread take-off channel 10 is at an increased distance x 2 from the fiber guide surface 14.
  • This increased distance x 2 is large enough that any air or fiber balls can be blown away from the area between the fiber guide surface 14 and the inlet opening 15 of the thread take-off channel 10 from the outside by pressurized air. You get into the exhaust air duct 12, which is still connected to a vacuum source, not shown, and are disposed of in this simple manner.

Abstract

The invention relates to a device for the production of a spun thread from a staple fibre composite, comprising an introduction channel, for introduction of the staple fibre composite and a thread draw-off channel, comprising an inlet opening. The above is arranged in an spindle-shaped component surrounded by an exhaust channel. An eddy chamber, connected to compressed air nozzles, generates an eddy current around the inlet opening of the thread draw-off channel. A fibre guide surface acting as a twist lock is arranged in the region of the inlet opening. As the separation between the fibre guide surface and the inlet opening of the thread draw-off channel is very small, on a thread breakage, a fibre or thread balling often occurs. The spindle shaped component can thus be removed in an axial direction, away from the fibre guide surface, in the case of an interruption in the spinning process. The spindle-shaped component is hence partly embodied as a piston, pushed into an operating position on pressurisation with compressed air and removed into an idle position by the action of a pressure spring, with the compressed air switched off, in which position the inlet opening of the thread draw-off channel has an increased separation from the fibre guide surface.

Description

Vorrichtung zum Herstellen eines gesponnenen Fadens aus einem Stapelfaserverband Device for producing a spun thread from a staple fiber bandage
Die Erfindung betrifft eine Vorrichtung zum Herstellen eines gesponnenen Fadens aus einem Stapelfaseiverband, mit einem Zuführkanal zum Zuführen des Stapelfaserverbandes, mit einem eine Einlassöffnung aufweisenden Fadenabzugskanal, der in einem spindelförmigen Bauteil angeordnet ist, mit einer an Druckluftdüsen angeschlossenen Wirbelkammer zum Erzeugen einer Wirbelströmung um die Einlassöffnung des Fadenabzugskanals, mit einem das spindelförmige Bauteil umgebenden Abluftkanal sowie mit einer im Bereich der Einlassöffnugg des Fadenabzugskanals angeordneten, als Drallsperre wirkenden Faserführungsfläche, wobei nach einer Unterbrechung des Spinnvorganges die aus den Druckluftdüsen austretende Druckluft abgeschaltet und das spindelförmige Bauteil von der Faserführungsfläche in axialer Richtung wegbewegt wird.The invention relates to a device for producing a spun thread from a staple fiber band, with a feed channel for feeding the staple fiber bandage, with a thread take-off channel having an inlet opening, which is arranged in a spindle-shaped component, with a swirl chamber connected to compressed air nozzles for generating a vortex flow around the inlet opening of the thread take-off duct, with an exhaust air duct surrounding the spindle-shaped component and with a fiber guide surface which acts as a twist lock and is arranged in the region of the inlet opening of the thread take-off duct, the compressed air emerging from the compressed air nozzles being switched off after an interruption of the spinning process and the spindle-shaped component being moved away from the fiber guide surface in the axial direction becomes.
Eine Vorrichtung dieser Art ist durch die DE 195 01 545 C2 Stand der Technik. Bei dieser Vorrichtung wird ein Stapelfaserverband im Streckwerk zu einem Faserbändchόn verzogen, dem in einem Luftdüsenaggregat dann die Spinndrehung erteilt wird. Hierzu wird das Faserbändchen durch einen Zuführkanal des Luftdüsenaggregates zunächst in eine Wirbelkammer geführt, der eine Fluideinrichtung zum Erzeugen einer Wirbelströmung um eine Einlassöffnung eines Fadenabzugskanals herum zugeordnet ist. Dabei werden zunächst die vorderen Enden der im Faserbändchen gehaltenen Fasern in den Fadenabzugskanal geführt, während hintere freieA device of this type is state of the art through DE 195 01 545 C2. In this device, a staple fiber dressing is drawn into a fiber ribbon in the drafting system, which is then given the spinning twist in an air nozzle unit. For this purpose, the fiber ribbon is first passed through a feed channel of the air nozzle unit into a swirl chamber, which is assigned a fluid device for generating a swirl flow around an inlet opening of a thread take-off channel. First, the front ends of the fibers held in the fiber ribbon are guided into the thread take-off channel, while the rear ends are free
Faserenden abgespreizt, von der Wirbelströmung erfasst und um die sich bereits in der Einlassöffnung des Fadenabzugskanals befindlichen, also eingebundenen vorderen Enden herumgedreht werden, wodurch ein Faden mit weitgehend echter Drehung erzeugt wird.The fiber ends are spread apart, caught by the vortex flow and rotated around the front ends that are already in the inlet opening of the thread take-off channel, that is to say incorporated, so that a thread with largely real rotation is produced.
Wenn aus irgendeinem Grund das noch sehr schwache ungedrehte Faserbändchen oder der ersponnene Faden bricht, muss ein Anspinnvorgang stattfinden, bei welchem das Ende des bereits ersponnenen Fadens zum Streckwerk zurückgeführt wird. Hierzu ist bei der bekannten Vorrichtung vorgesehen, dass nach einer Unterbrechung des Spinnvorganges die aus den Druckluftdüsen austretende Druckluft abgeschaltet und das spindelförmige Bauteil von der Faserführungsfläche wegbewegt wird. Bei dieser Gelegenheit ist es auch möglich, den Bereich zwischen der Faserführungsfläche und der Einlassöffnung des Fadenabzugskanals zu reinigen, denn bei dem geringen Abstand, den die Einlassöffnung bei Betrieb zur Faserführungsfläche aufweist, kommt es häufig vor, dass sich bei Fadenbruch ein Faser- oder Fadenknäuel in dem engen Spalt festsetzt. Das Entfernen des Fadenabzugskanals von der Faserführungsfläche ist jedoch sehr aufwändig, da die genannten Bauteile sich in unterschiedlichen Gehäusen befinden, die bei einer Unterbrechung des Spinnvorganges vollständig voneinander getrennt werden müssen. Die Ansteuerung für das Trennen dieser Gehäuse geschieht dabei über einen externen Mechanismus.If for any reason the still very weak untwisted fiber ribbon or the spun thread breaks, a piecing process must take place in which the end of the already spun thread is returned to the drafting system. For this purpose, the known device provides that after an interruption of the spinning process, the compressed air emerging from the compressed air nozzles is switched off and the spindle-shaped component is moved away from the fiber guide surface. On this occasion, it is also possible to clean the area between the fiber guide surface and the inlet opening of the thread take-off channel, because with the small distance that the inlet opening is in operation from the fiber guide surface, it often happens that a fiber or thread ball occurs when the thread breaks stuck in the narrow gap. However, the removal of the thread take-off channel from the fiber guiding surface is very complex since the components mentioned are located in different housings which must be completely separated from one another if the spinning process is interrupted. The control for the separation of these housings takes place via an external mechanism.
Der Erfindung liegt die Aufgabe zu Grunde, bei einer Unterbrechung des Spinnvorganges den sehr engen Spalt zwischen der Faserführungsfläche und der Einlassöffnung des Fadenabzugskanals säubern zu können, ohne dass in aufwändiger Weise unterschiedliche Gehäuse durch externe Mechanismen voneinander getrennt werden müssen.The invention is based on the object of being able to clean the very narrow gap between the fiber guide surface and the inlet opening of the thread take-off channel when the spinning process is interrupted, without having to separate different housings from one another in a complex manner by external mechanisms.
Die Aufgabe wird dadurch gelöst, dass das spindelförmige Bauteil teilweise als Kolben einer Kolben-Zyiinder-Einheit ausgebildet ist, der bei eingeschalteter Druckluft in eine Betriebsposition gedrückt wird, in welcher die Faserführungsfläche im Bereich der Einlassoffnung des Fadenabzugskanals liegt, und bei abgeschalteter Druckluft in eine Außerbetriebsposition bewegt wird, in welcher die Einlassöffnung des Fadenabzugskanals gegenüber der Faserführungsfläche einen vergrößerten Abstand aufweist. Insbesondere greift am Kolben eine Druckfeder an, die bei eingeschalteter Druckluft gespannt wird und bei abgeschalteter Druckluft den Kolben in seine Außerbetriebsposition drückt. Hierfür ist die Druckluftzufuhr für die Druckluftdüsen mit einer Abzweigung versehen, die der Kolben-Zylinder-Einheit zugeordnet ist.The object is achieved in that the spindle-shaped component is partially designed as a piston of a piston-cylinder unit, which, when the compressed air is switched on, is pressed into an operating position in which the fiber guide surface lies in the region of the inlet opening of the thread take-off channel, and when the compressed air is switched off into a Is moved out of operation position, in which the inlet opening of the thread take-off channel is at an increased distance from the fiber guide surface. In particular, a compression spring acts on the piston, which is tensioned when the compressed air is switched on and presses the piston into its non-operating position when the compressed air is switched off. For this purpose, the compressed air supply for the compressed air nozzles is provided with a branch which is assigned to the piston-cylinder unit.
Man macht sich erfindungsgemäß somit den Umstand zunutze, dass im Falle einer Unterbrechung I des Spinnvorganges die Druckluft der Druckluftdüsen abgeschaltet wird. Wenn, das spindelförmige Bauteil wie ein Pneumatikkolben ausgebildet ist, kann während des Spinnvorganges das spindelförmige Bauteil mit einem Überdruck beaufschlagt und in die Spinnposition gedrückt und bei Fadenbruch und fehlendem Überdruck über eine Feder vom Faserführungselement weggedrückt werden. Etwaige Faser- oder Fadenknäuel im Bereich der Faserführungsfläche können dann, wegen des deutlich vergrößerten Abstandes zur Einlassöffnung des Fadenabzugskanals, beispielsweise durch Einbiasen von Pressluft in den Zuführkanal leicht entfernt und vom Unterdruck des Abluftkanals entsorgt werden. Hierfür sind keine Gehäuse voneinander zu trennen, sondern die Kolben-Zylinder-Einheit befindet sich komplett im Innern des Luftdüsenaggregates. Ferner ist kein externer Mechanismus zum Betätigen dieser nicht vorhandenen trennbaren Gehäuse vonnöten.According to the invention, use is therefore made of the fact that in the event of an interruption I in the spinning process, the compressed air of the compressed air nozzles is switched off. If, the spindle-shaped component is designed like a pneumatic piston, an overpressure can be applied to the spindle-shaped component during the spinning process and pressed into the spinning position and, in the event of thread breakage and a lack of excess pressure, being pressed away from the fiber guide element by means of a spring. Any fiber or thread balls in the area of the fiber guide surface can then easily, for example by blowing compressed air into the feed channel, because of the significantly increased distance from the inlet opening of the thread take-off channel removed and disposed of by the negative pressure of the exhaust air duct. No housings can be separated from each other for this, but the piston-cylinder unit is located completely inside the air nozzle unit. Furthermore, no external mechanism for operating these non-existent separable housings is required.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels.Further advantages and features of the invention result from the following description of an exemplary embodiment.
Es zeigen:Show it:
Figur 1 in stark vergrößerter Darstellung eine erfindungsgemäße Vorrichtung im Axialschnitt bei Betrieb,1 shows a greatly enlarged illustration of a device according to the invention in axial section during operation,
Figur 2 die gleiche Vorrichtung in gleicher Ansicht im Außerbetriebszustand.Figure 2 shows the same device in the same view in the non-operating state.
Die in Figur 1 dargestellte Vorrichtung dient dem Herstellen eines gesponnenen Fadens 1 aus einem Stapelfaserverband 2. Die Vorrichtung enthält als wesentliche Bestandteile ein Streckwerk 3 sowie ein Luftdüsenaggregat 4.The device shown in FIG. 1 is used to produce a spun thread 1 from a staple fiber dressing 2. The essential components include a drafting device 3 and an air nozzle unit 4.
Der zu verspinnende Stapelfaserverband 2 wird dem Streckwerk 3 in Zulieferrrichtung A zugeführt und als ersponnener Faden 1 in Abzugsrichtung B abgezogen und an eine nicht dargestellte Aufspuleinrichtung weitergeleitet. Das nur teilweise dargestellte Streckwerk 3 ist vorzugsweise ein Drei-Zylinder-Streckwerk und enthält somit insgesamt drei Walzenpaare, die jeweils eine angetriebene Unterwaize und eine als Druckwalze ausgebildete Oberwalze enthalten. Dargestellt ist lediglich das Lieferwalzenpaar 5, 6. In einem solchen Streckwerk 3 wird in bekannter Weise ein Stapelfaserverband 2 bis zu einer gewünschten Feinheit verzogen. Im Anschluss an das Streckwerk 3 liegt dann ein dünnes Faserbändchen 7 vor, welches verstreckt Und noch ungedreht ist.The staple fiber structure 2 to be spun is fed to the drafting device 3 in the direction of delivery A and drawn off as spun thread 1 in the direction of take-off B and passed on to a winding device (not shown). The drafting system 3, which is only partially shown, is preferably a three-cylinder drafting system and thus contains a total of three pairs of rollers, each of which contains a driven lower roller and an upper roller designed as a pressure roller. Only the delivery roller pair 5, 6 is shown. In such a drafting system 3, a staple fiber structure 2 is warped in a known manner to a desired fineness. Following the drafting unit 3, there is then a thin fiber ribbon 7, which is stretched and still untwisted.
Dem Luftdüsenaggregat 4 wird das Faserbändchen 7 über einen ZuführkanaJ 8 zugeführt. Es folgt eine so genannte Wirbelkammer 9, in welcher dem Faserbändchen 7 die Spinndrehung erteilt wird, so dass der gesponnene Faden 1 entsteht, der durch einen Fadenabzugskanal 10 abgezogen wird. Eine Fluideinrichtung erzeugt in der Wirbelkammer 9 durch Einblasen von Druckluft durch tangential in die Wirbelkammer 9 mündende Druckluftdüsen 11 eine Wirbelströmung. Die aus den Düsenöffnungen austretende Druckluft wird durch einen Abluftkanal 12 abgeführt, wobei dieser einen ringförmigen Querschnitt um ein spindelförmiges, bei Betrieb stationäres Bauteil 13 herum aufweist, welches den Fadenabzugskanal 10 enthält.The fiber ribbon 7 is fed to the air nozzle unit 4 via a feed channel 8. A so-called swirl chamber 9 follows, in which the fiber ribbon 7 is given the spinning twist, so that the spun thread 1 is produced, which is drawn off through a thread take-off channel 10. A fluid device generates a vortex flow in the vortex chamber 9 by blowing compressed air through tangential air nozzles 11 opening tangentially into the vortex chamber 9. The compressed air emerging from the nozzle openings is discharged through an exhaust air duct 12 has an annular cross section around a spindle-shaped component 13 which is stationary during operation and which contains the thread take-off channel 10.
Im Bereich der Wirbelkammer 9 ist als Drallsperre eine Kante einer Faserführungsfläche 14 angeordnet, die leicht exzentrisch zum Fadenabzugskanal 10 im Bereich von dessen Einlassöffnung 15 angeordnet ist.In the area of the swirl chamber 9, an edge of a fiber guide surface 14 is arranged as a twist lock, which is arranged slightly eccentrically to the thread take-off channel 10 in the area of its inlet opening 15.
In der Vorrichtung werden die zu verspinnenden Fasern einerseits im Faserbändchen 7 gehalten und so vom Zuführkanal 8 im Wesentlichen ohne Drehungserteilung in den Fadenabzugskanal 10 geführt, andererseits sind die Fasern aber in dem Bereich zwischen dem Zuführkanal 8 und dem Fadenabzugskanal 10 der Wirkung der Wirbelströmung ausgesetzt. Durch diese werden die Fasern oder mindestens ihre Endbereiche von der Einlassöffnung 15 des Fadenabzugskanals 10 radial weggetrieben. Die mit der beschriebenen Vorrichtung hergestellten Fäden 1 zeigen dadurch einen Kern von im Wesentlichen in Fadenlängsrichtung verlaufenden Fasern oder Faserbereichen ohne wesentliche Drehung und einen äußeren Bereich, in welchem die Fasern oder Faserbereiche um den Kern herum gedreht sind. Eine Vorrichtung dieser Art erlaubt sehr hohe Spinngeschwindigkeiten, die in der Größenordnung von 600 m/min liegen können.In the device, the fibers to be spun are held on the one hand in the fiber ribbon 7 and thus guided from the feed channel 8 into the thread take-off channel 10 essentially without giving rotation, but on the other hand the fibers in the area between the feed channel 8 and the thread take-off channel 10 are exposed to the effect of the vortex flow. Through this, the fibers or at least their end regions are driven radially away from the inlet opening 15 of the thread take-off channel 10. The threads 1 produced with the described device thereby show a core of fibers or fiber regions running essentially in the longitudinal direction of the thread without substantial rotation and an outer region in which the fibers or fiber regions are rotated around the core. A device of this type allows very high spinning speeds, which can be in the order of 600 m / min.
Die aus den Druckluftdüsen 11 in die Wirbelkammer 9 austretende Druckluft wird dem Luftdüsenaggregat 4 über einen Druckluftkanal 16 in Zuführrichtung C durchgeführt. Vom Druckluftkanal 16 gelangt die Druckluft zunächst in einen die Wirbelkammer 9 umgebenden Ringkanal 17, an welchen die genannten Druckluftdüsen 11 direkt angeschlossen sind.The compressed air emerging from the compressed air nozzles 11 into the swirl chamber 9 is passed to the air nozzle assembly 4 via a compressed air duct 16 in the feed direction C. From the compressed air duct 16, the compressed air first arrives in an annular duct 17 surrounding the swirl chamber 9, to which said compressed air nozzles 11 are directly connected.
Zwischen der Einlassöffnung 15 des Fadenabzugskanals 10 und der Faserführungsfläche 14 besteht während des betriebsmäßigen Spinnvorganges ein sehr kleiner Abstand x, , der beispielsweise 0,5 mm beträgt. Dieser kleine Abstand x^ wird dadurch hergestellt, dass das spindelförmige Bauteil 13 in axialer Richtung verschiebbar angeordnet ist. Hierfür ist das spindelförmige Bauteil 13 teilweise als Kolben 18 einer Kolben-Zylinder-Einheit 19 ausgebildet. Letztere arbeitet mit Druckluft, wozu der Druckluftkanal 16 mit einer Abzweigung ,20 versehen ist, die über einen Verbindungskanal 21 in eine Überdruckkammer 22 mündet. Diese Überdruckkammer 22 ist in Figur 1 mit einem Pluszeichen versehen und liegt auf derjenigen Seite des Kolbens 18, der der Einlassöffnung 15 des Fadenabzugskanals 10 abgewandt ist. Der Abluftkanal 12 hingegen ist mit einem Minuszeichen versehen, um deutlich zu machen, dass sich hierein Unterdruckbereich befindet. Der Überdruck in der Überdruckkammer 22 drückt bei Betrieb den Kolben 18 und das damit fest verbundene Bauteil 13 gegen einen Anschlag 23. Dadurch wird unter der Wirkung des Überdruckes der kleine Abstand xi zwischen der Faserführungsfläche 14 und der Einlassöffnung 15 des Fadenabzugskanals 10 bei Betrieb festgelegt.During the operational spinning process, there is a very small distance x, between the inlet opening 15 of the thread take-off channel 10 and the fiber guide surface 14, which is, for example, 0.5 mm. This small distance x ^ is produced in that the spindle-shaped component 13 is arranged to be displaceable in the axial direction. For this purpose, the spindle-shaped component 13 is partially designed as a piston 18 of a piston-cylinder unit 19. The latter works with compressed air, for which purpose the compressed air duct 16 is provided with a branch 20, which opens into a pressure chamber 22 via a connecting duct 21. This pressure chamber 22 is provided with a plus sign in FIG. 1 and is located on that side of the piston 18 which faces away from the inlet opening 15 of the thread take-off channel 10. The exhaust air duct 12, on the other hand, is provided with a minus sign in order to make it clear that there is a negative pressure area here. The overpressure in the overpressure chamber 22 presses the piston 18 and the component 13 firmly connected to it against a stop 23 during operation. As a result, under the effect of the overpressure, the small distance xi between the fiber guide surface 14 and the inlet opening 15 of the thread take-off channel 10 is fixed during operation.
Wenn aus irgendeinem Grund das Faserbändchen 7 oder der Faden 1 bricht, wird zunächst der Überdruck abgeschaltet. Dadurch kommt eine Druckfeder 24 zur Wirkung, welche am Kolben 18 angreift und bei eingeschalteter Druckluft gespannt gehalten war. Bei abgeschalteter Druckluft jedoch kann die Druckfeder 24 den Kolben 18 in eine Außerbetriebsposition drücken, bis der Kolben 18 an einen Anschlag 25 gelangt, siehe die den Außerbetriebszustand darstellende Figur 2.If for some reason the fiber ribbon 7 or the thread 1 breaks, the excess pressure is first switched off. As a result, a compression spring 24 comes into effect, which acts on the piston 18 and was kept under tension when the compressed air was switched on. When the compressed air is switched off, however, the compression spring 24 can push the piston 18 into an inoperative position until the piston 18 reaches a stop 25, see FIG. 2 depicting the inoperative state.
Unter der Wirkung der Druckfeder 24 wird somit bei einer Unterbrechung des Spinnvorganges das spindelförmige Bauteil 13 von der Faserführungsfläche 14 in axialer Richtung wegbewegt. Bei Erreichen des Kolbens 18 am Anschlag 25 weist dann die Einlassöffnung 15 des Fadenabzugskanals 10 gegenüber der Faserführungsfläche 14 einen vergrößerten Abstand x2 auf. Dieser vergrößerte Abstand x2 ist groß genug, dass durch Pressluftbeaufschlagung des Zuluftkanals 8 von außen etwaige Faser- oder Fadenknäuel aus dem Bereich zwischen der Faserführungsfläche 14 und der Einlassoffnung 15 des Fadenabzugskanals 10 weggeblasen werden können. Sie gelangen dabei in den Abluftkanal 12, der weiterhin an eine nicht dargestellte Unterdruckquelle angeschlossen ist, und werden auf diese einfache Art entsorgt. Under the action of the compression spring 24, the spindle-shaped component 13 is thus moved away from the fiber guide surface 14 in the axial direction when the spinning process is interrupted. When the piston 18 reaches the stop 25, the inlet opening 15 of the thread take-off channel 10 is at an increased distance x 2 from the fiber guide surface 14. This increased distance x 2 is large enough that any air or fiber balls can be blown away from the area between the fiber guide surface 14 and the inlet opening 15 of the thread take-off channel 10 from the outside by pressurized air. You get into the exhaust air duct 12, which is still connected to a vacuum source, not shown, and are disposed of in this simple manner.

Claims

P at e n ta n s p r ü c h e P a t a n ts
1. Vorrichtung zum Herstellen eines gesponnenen Fadens aus einem Stapelfaserverband, mit einem Zuführkanal zum Zuführen des Stapelfaserverbandes, mit einem eine Einlassöffnung aufweisenden Fadenabzugskanal, der in einem spindelförmigen Bauteil angeordnet ist, mit einer an Druckluftdüsen angeschlossenen Wirbelkammer zum Erzeugen einer Wirbelströmung um die Einlassöffnung des Fadenabzugskanals, mit einem das spindelförmige Bauteil umgebenden Abluftkanal sowie mit einer im Bereich der Einlassöffnung des Fadenabzugskanals angeordneten, als Drallsperre wirkenden Faserführungsfläche, wobei nach einer Unterbrechung des Spinnvorganges die aus den Druckluftdüsen austretende Druckluft abgeschaltet und das spindelförmige Bauteil von der Faserführungsfläche in axialer Richtung wegbewegt wird, dadurch gekennzeichnet, dass das spindelförmige Bauteil (13) teilweise als Kolben (18) einer Kolben-Zylinder-Einheit (19) ausgebildet ist, der bei eingeschalteter Druckluft in eine Betriebsposition gedrückt wird, in welcher die Faserführungsfläche (14) im Bereich der Einlassöffnung (15) des Fadenabzugskanals (10) liegt, und bei abgeschalteter Druckluft in eine Außerbetriebsposition bewegt wird, in welcher die Einlassöffnung (15) des Fadenabzugskanals (10) gegenüber der Faserführungsfläche (14) einen vergrößerten Abstand (x2 ) aufweist.1. Device for producing a spun thread from a staple fiber dressing, with a feed channel for feeding the staple fiber dressing, with a thread take-off channel having an inlet opening, which is arranged in a spindle-shaped component, with a swirl chamber connected to compressed air nozzles for generating a vortex flow around the inlet opening of the thread take-off channel , with an exhaust air duct surrounding the spindle-shaped component and with a fiber guide surface arranged in the region of the inlet opening of the thread take-off channel, which acts as a twist lock, the compressed air emerging from the compressed air nozzles being switched off after an interruption of the spinning process and the spindle-shaped component being moved away from the fiber guide surface in the axial direction, characterized in that the spindle-shaped component (13) is partially designed as a piston (18) of a piston-cylinder unit (19) which, when the compressed air is switched on, into an operating position ition is pressed, in which the fiber guide surface (14) lies in the region of the inlet opening (15) of the thread take-off channel (10), and when the compressed air is switched off, it is moved into a non-operating position in which the inlet opening (15) of the thread take-off channel (10) is opposite the fiber guide surface (14) has an increased distance (x 2 ).
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass am Kolben (18) eine Druckfeder (24) angreift, die bei eingeschalteter Druckluft gespannt wird und bei abgeschalteter Druckluft den Kolben (18) in seine Außerbetriebsposition drückt.2. Device according to claim 1, characterized in that a pressure spring (24) acts on the piston (18), which is tensioned when the compressed air is switched on and presses the piston (18) into its inoperative position when the compressed air is switched off.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Druckluftzufuhr für die Druckluftdüsen (11 ) mit einer Abzweigung (20) versehen ist, die der Kolben-Zylinder-Einheit (19) zugeordnet ist, 3. Device according to claim 1 or 2, characterized in that the compressed air supply for the compressed air nozzles (11) is provided with a branch (20) which is assigned to the piston-cylinder unit (19),
PCT/EP2004/008966 2003-09-23 2004-08-11 Device for the production of a spun thread from a staple fibre composite WO2005040466A1 (en)

Applications Claiming Priority (2)

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DE2003146226 DE10346226A1 (en) 2003-09-23 2003-09-23 Yarn-forming spindle for air vortex spinner is mounted on compressed air cylinder to allow it to retract to give better access for cleaning
DE10346226.0 2003-09-23

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JP2013002023A (en) * 2011-06-20 2013-01-07 Murata Mach Ltd Hollow guide shaft unit, air spinning device and spinning machine
ITUA20163011A1 (en) * 2016-04-29 2017-10-29 Savio Macch Tessili Spa AIR-JET TYPE SPINNING DEVICE

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501545A1 (en) * 1994-01-25 1995-07-27 Murata Machinery Ltd Yarn splicing
DE19532619A1 (en) * 1994-09-05 1996-03-07 Murata Machinery Ltd Spun yarn to sliver joining

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501545A1 (en) * 1994-01-25 1995-07-27 Murata Machinery Ltd Yarn splicing
DE19532619A1 (en) * 1994-09-05 1996-03-07 Murata Machinery Ltd Spun yarn to sliver joining

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