EP2329066B1 - Air jet spinning unit having spindle-shaped component - Google Patents

Air jet spinning unit having spindle-shaped component Download PDF

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Publication number
EP2329066B1
EP2329066B1 EP09778486.2A EP09778486A EP2329066B1 EP 2329066 B1 EP2329066 B1 EP 2329066B1 EP 09778486 A EP09778486 A EP 09778486A EP 2329066 B1 EP2329066 B1 EP 2329066B1
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EP
European Patent Office
Prior art keywords
spindle
shaped component
spinning unit
component
channel
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EP09778486.2A
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German (de)
French (fr)
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EP2329066A1 (en
Inventor
Peter Schweier
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP2329066A1 publication Critical patent/EP2329066A1/en
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    • 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
    • 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

Definitions

  • the invention relates to an air jet spinning unit with a spindle-shaped component, which has a thread withdrawal channel with an inlet opening and which is located in a vortex chamber, starting from an operating position in which a tapered spindle tip of the spindle-shaped component, which contains the inlet opening of the thread withdrawal channel
  • a rotating air flow spinning spin can be dispensed, along the yarn withdrawal channel and in the yarn withdrawal direction is displaceable, wherein by moving the spindle-shaped component in the direction mentioned the spindle fungus is movable out of the vortex chamber.
  • the invention further relates to a spindle-shaped component for an air jet spinning unit with a yarn withdrawal channel, with a cylindrical sliding surface for receiving the air jet spinning unit and with a tapered spindle tip containing the inlet opening of the yarn withdrawal channel, wherein the spindle-shaped member has a magnetic bearing surface for fixing the spindle-shaped component in contains its operating position in the air jet spinning unit.
  • An air jet spinning unit of the type mentioned is from the DE 10 2004 044 345 A1 known.
  • a spring and a pneumatic cylinder are integrated in the known air jet spinning unit.
  • the complicated structure of the air jet spinning unit makes the production consuming.
  • An air jet spinning unit is known in which the movement and holding devices for the spindle-shaped component are not integrated in the air jet spinning unit.
  • the spindle-shaped component is connected to a cylinder arranged outside the air jet spinning unit and can thereby be moved along the yarn withdrawal channel.
  • the air jet spinning unit is completely opened.
  • the external pneumatic cylinder requires a lot of space in the air jet spinning device.
  • the shows EP 1 748 094 A1 a spinning device for producing a thread by means of a circulating air flow
  • the air spinning device comprises a arranged in a spinning housing, rotatably mounted about its central longitudinal axis, hollow spinning cone and for generating the circulating air flow is acted upon with compressed air nozzle block.
  • the spinning cone is mounted on a magnetic bearing assembly in the rear housing part so that the installation angle position of the spinning cone within the air spinning device is selectively adjustable.
  • the invention has for its object to provide an air jet spinning unit with a simplified structure.
  • the air jet spinning unit has at least one magnet for holding the spindle-shaped component in its operating position, a bearing surface of magnetic material cooperating with the magnet and with the aid of which the spindle-shaped component is movable starting from its operating position in the yarn withdrawal direction, to thereby move the spindle tip out of the vortex chamber.
  • the object is achieved in that the spindle-shaped component has a groove into which projections of a lever fastened to a base body of the air nozzle spinning unit can be clipped in order to move the spindle-shaped component.
  • the only holding means for the spindle-shaped component in the air jet spinning unit is a magnet. Of course, several magnets can be provided. Other fasteners and retaining means are on the air jet spinning unit or not required on the spinning device. The manufacturing and assembly costs for the air jet spinning unit is thereby greatly simplified.
  • the spindle-shaped component is held in its operating position in the air jet spinning unit, that a tapered spindle tip of the spindle-shaped component, which contains the inlet opening of the yarn withdrawal channel, is located in a swirl chamber, in which the spin-fiber structure by a rotating air flow spinning spin is granted. It is known that in the air jet spinning unit malfunctions can occur and the vortex chamber must be cleaned. To rectify malfunctions, the spindle-shaped component is moved parallel to the thread withdrawal channel in the thread withdrawal direction, so that the spindle tip moves out of the vortex chamber. Fiber accumulations in the vortex chamber can thus be eliminated.
  • the invention has the advantage that for the movement of the spindle-shaped component no complicated and / or very much space-claiming structures are required.
  • the spindle-shaped component can be accommodated in a simple cylindrical receptacle in a base body of the air jet spinning unit and can be moved along the cylindrical receptacle.
  • at least one magnet can be arranged in the base body. The magnet cooperates with the magnetic abutment surface on the spindle-shaped component and holds the spindle-shaped component in its operating position.
  • at least one magnet can be arranged on the spindle-shaped component or a holding element connected thereto.
  • the magnet cooperates in this embodiment with a magnetic contact surface on the base body of the air jet spinning unit.
  • the spindle-shaped component can be moved counter to the magnetic force in the yarn withdrawal direction along the yarn withdrawal channel to eliminate malfunction so that the spindle tip moves out of the vortex chamber.
  • the movement of the spindle-shaped component can be done manually by maintenance personnel. Due to the simple attachment of the spindle-shaped component, it is also possible to very easily remove the spindle-shaped component from the air jet spinning unit and replace it with another spindle-shaped component.
  • the movement of the spindle-shaped component takes place by means of a maintenance device which can be moved along the air-spinning machine, a so-called service robot.
  • a lever in particular a pivot lever, is provided for moving the spindle-shaped component.
  • the lever is attached to the base body and only clipped on the spindle-shaped component, so that the spindle-shaped component is still very easily replaceable.
  • the magnetic contact surface for fixing the spindle-shaped component in its operating position is preferably annular and may be arranged concentrically to the cylindrical sliding surface.
  • the spindle-shaped component consists of several components, preferably of three components.
  • a first component contains the cylindrical sliding surface.
  • the first component preferably consists of a material which has good sliding properties in relation to the material of the main body.
  • Advantageous for the first component is a plastic or a brass or bronze material.
  • the cylindrical sliding surface may also have a coating.
  • the second component of the spindle-shaped component contains the tapered spindle tip with the inlet opening of the thread withdrawal channel.
  • the conical outer contour of the second component is preferably divided into areas with different conicity, wherein the cone angle decreases towards the spindle tip.
  • a third component of the spindle-shaped component may include the magnetic bearing surface for fixing the spindle-shaped component in its operating position.
  • the third component is preferably formed by a steel ring attached to the first component.
  • the spindle-shaped component consists of two components.
  • the first component consists of a magnetic material, for example of steel.
  • the magnetic contact surface for fixing the spindle-shaped component in its operating position can then be integrated into the first component, so that it is possible to dispense with the third component.
  • the spindle-shaped component thus consists of a first component containing the cylindrical sliding surface and the magnetic bearing surface, and of a second component containing the spindle tip.
  • the spindle-shaped component has an injection channel opening into the thread withdrawal channel and a compressed air connection for supplying the injection channel.
  • the compressed air connection is suitable for attaching a compressed air hose.
  • the injection channel can be acted upon for a piecing process with compressed air, so that in the yarn withdrawal channel creates a defined air flow.
  • Through the injection channel directed to the spindle tip air flow can be generated in the thread withdrawal channel, which serves for returning a thread end counter to the thread take-off direction by the air jet spinning unit.
  • a rotating air flow in the yarn withdrawal channel can be generated by the injection channel.
  • a rotating air flow in the thread withdrawal channel is particularly advantageous if a piecing without auxiliary thread is to be performed.
  • the invention has the advantage that the length of the thread withdrawal channel in the spindle-shaped component can be relatively small.
  • the shortest possible thread withdrawal channel in the spindle-shaped component can reduce a deterioration of the thread quality, which can be caused by excessive contact of the spun thread with the wall of the thread withdrawal channel.
  • the length of the yarn withdrawal channel in the spindle-shaped component is less than 80 mm, and in particular less than 40 mm.
  • FIG. 1 illustrated air jet spinning unit 1 is used to produce a spun yarn 2 from a staple fiber 3.
  • the air jet spinning unit 1 is a drafting 4 upstream.
  • the staple fiber staple 3 is fed in drafting 4 in the direction of delay A and withdrawn as spun yarn 2 in the yarn withdrawal direction B and forwarded to a winding device, not shown.
  • the drafting unit 4 which is only partially shown, is preferably a three-cylinder drafting unit and thus comprises a total of three pairs of rollers, each having a driven lower roller and an upper roller designed as a pressure roller. Shown is only the delay zone of the drafting 4 limiting delivery roller pair 5, 6. In such a drafting 4 is warped in a known manner, the staple Elaband 3 to a desired fineness. Following the nip line of the delivery roller pair 5, 6 of the drafting system 4 is then a thin fiber ribbon 7, which is finished stretched and still untwisted.
  • the air jet spinning unit 1, the fiber ribbon 7 is fed via a Faserzu 1500kanal 8. It follows a so-called vortex chamber 9, in which the fiber ribbon 7, the spinning rotation is granted, so that the spun yarn 2, which is withdrawn through a yarn withdrawal channel 10, is formed.
  • a fluid device generates during the spinning process in the vortex chamber 9 by blowing compressed air through tangentially opening into the vortex chamber 9 Drurkluftdüsen 11 a rotating vortex flow.
  • the compressed air is supplied in the air jet spinning unit 1 during operation via a compressed air channel 12. From the compressed air channel 12, the compressed air passes first into a surrounding the vortex chamber 9 annular channel 13, to which said compressed-air nozzles 11 are connected directly. The emerging from the compressed air nozzles 11 compressed air is discharged through an exhaust duct 14.
  • the exhaust duct 14 is annularly arranged around a spindle-shaped component 15 which contains the yarn withdrawal channel 10.
  • the spindle-shaped component 15 is stationary during operation.
  • an edge of a fiber guide surface 16 is arranged as a swirl barrier, which is arranged slightly eccentrically to the yarn withdrawal channel 10 in the region of its inlet opening 17.
  • the inlet opening 17 of the thread withdrawal channel 10 is arranged at a conically tapering end of the spindle-shaped component 15.
  • the tapered end is referred to as a spindle tip 18.
  • the fibers to be spun are held on the one hand in the fiber ribbon 7 and thus guided by the Faserzu slaughter 18 substantially without rotation division in the inlet opening 17 of the yarn withdrawal channel 10.
  • the fibers are in the range between the fiber feed channel 8 and the thread withdrawal channel 10 the effect of the vortex flow in the vortex chamber 9 exposed.
  • the fibers or at least their end regions are driven radially away from the inlet opening 17 and wrapped around the fibers already entering the yarn withdrawal channel 10.
  • the yarns 2 made with the described air jet spinning units 1 therefore exhibit a core of fibers or fiber portions extending substantially in the yarn longitudinal direction without substantial rotation and an outer portion in which the fibers or fiber portions are rotated around the core.
  • An air jet spinning device of this type allows very high spinning speeds, which are on the order of between 300 and 600 meters per minute.
  • the drafting unit 4 is first stopped and the supply of the staple fiber strand 3 is interrupted.
  • the unwinding device not shown, is turned off.
  • the spindle-shaped component 15 is displaced along the yarn withdrawal channel 10 in the yarn withdrawal direction B, so that the spindle tip 18 moves out of the swirl chamber 9.
  • the vortex chamber 9 clogging fiber accumulations can then be sucked off via the connected to a vacuum source, not shown exhaust air duct 14.
  • a main body 19 of the air jet spinning unit 1 has a cylindrical receptacle 20, in which the spindle-shaped component 15 is movably inserted with a cylindrical sliding surface 21.
  • the spindle-shaped component 15 In the main body 20, one or more magnets 22, in the illustrated case two magnets 22, are arranged.
  • the spindle-shaped component 15 has a bearing surface 23, which cooperates with the magnet 22, of a magnetic material.
  • the magnets 22 hold the spindle-shaped component 15 in its operating position.
  • the magnetic Contact surface 23 is annular.
  • the contact surface 23 and the cylindrical sliding surface 21 are arranged concentrically around the yarn withdrawal channel 10.
  • the spindle-shaped component 15 can be moved counter to the magnetic force in the yarn withdrawal direction B along the cylindrical sliding surface 21.
  • the movement of the spindle-shaped component 15 can be carried out manually by an operator or by a maintenance trolley movable along the air-spinning machine.
  • a lever 24 for moving the spindle-shaped component 15 is provided.
  • the lever 24 is in FIG. 2 recognizable.
  • the lever 24 is designed as a pivot lever and fixed by means of a pivot axis 25 on the base body 19 of the air jet spinning unit 1.
  • the lever 24 has projections 26 which are clipped in a groove 27 of the spindle-shaped component.
  • the lever 24 can be operated manually or automatically in its gripping area 28 and thereby moves the spindle-shaped component 15 parallel to the thread withdrawal channel 10.
  • the lever 24 prevents at the same time that after moving away the contact surface 23 from the sphere of action of the magnets 22, the spindle-shaped member 15 by itself the cylindrical receptacle 20 of the main body 19 falls out. If it is necessary to remove the spindle-shaped component completely from the air jet spinning unit 1, the spindle-shaped component 15 can be easily clipped out of the lever 24 with its groove 27 and removed from the air jet spinning unit 1.
  • the spindle-shaped component 15 is again moved counter to the yarn withdrawal direction B and the spindle tip 18 returns to its operating position in the swirl chamber 9.
  • the magnets 22 fix the spindle-shaped component 15 on the contact surface 23rd
  • an opening into the thread withdrawal channel 10 injection channel 29 is provided. Furthermore, a compressed air connection 30 is present on the spindle-shaped component 15, which is used to supply the injection channel 29 can be acted upon temporarily compressed air.
  • the compressed air connection 30 is formed by a connecting piece 37 for a compressed air hose, not shown.
  • the injection channel 29 serves to support a piecing process of the air jet spinning unit 1 and can in the in FIG. 1 illustrated manner in the yarn withdrawal channel 10 open, so that the air flowing through the injection channel 29 compressed air in the yarn withdrawal channel 10 generates a counter to the yarn withdrawal direction B directed air flow.
  • the injection channel 29 may also open into the thread withdrawal channel 10 in such a way that a rotating air flow is created in the thread withdrawal channel 10.
  • the spindle-shaped component 15 consists of three components 31, 32, 33.
  • a first component 31 of the spindle-shaped component 15 contains the cylindrical sliding surface 21, a part of the thread withdrawal channel 10 and the compressed air connection 30. If a lever 24 is provided, the first component 31 contains also the groove 27.
  • a second component 32 forms the tapered end of the spindle-shaped member 15 and includes the spindle tip 18 and the inlet opening 17 of the thread withdrawal channel 10.
  • the injection channel 29 extends from the compressed air port 30 through the first component 31 and the second component 32 and opens within the second component 32 in the thread withdrawal channel 10.
  • the first component 31 of the spindle-shaped member 15 is made of a plastic.
  • the cylindrical sliding surface 21 thus has good sliding properties relative to the receptacle 20 in the base body 19.
  • the sliding surface 21 has a diameter of 15 to 20 mm.
  • a third component 33 of the spindle-shaped component 15 is provided, which contains the magnetic contact surface 23.
  • the third component 33 consists of a steel ring attached to the first component 31. Of the Steel ring 33 may, for example, be pressed onto the cylindrical sliding surface 21 or secured by threaded pins, not shown.
  • the distance between the contact surface 23 and the spindle tip 18 in the region of the inlet opening 17 is important for the properties of the spun yarn 2. By changing the distance from the spindle tip 18 to the contact surface 23 can be varied, how far the spindle tip 18 in the vortex chamber 9 protrudes. Different mass can be achieved, for example, if otherwise the same dimensions only the height of the steel ring 33 is changed.
  • steel rings 33 can be used with different height dimensions or it can be adjusted by a use of washers between the first component 31 and the steel ring 33, the position of the contact surface 23. This also tolerances on the spindle-shaped member 15 can be compensated. It is also possible to machine an otherwise finished spindle-shaped component 15 in a final operation on the abutment surface 23 in order to ensure an exact spacing of the spindle tip 18 from the abutment surface 23.
  • the spindle component 18 containing the second component 32 is inserted via cylindrical receiving surfaces 34 in the first component 31 and fixed by a threaded pin 35.
  • the receiving surfaces 34 may be associated with sealing rings 36.
  • the second component 32 can also be pressed into the first component 31 in an embodiment not shown, then the threaded pin 35 and the sealing rings 36 could be dispensed with.
  • the second component 32 has on its outer contour a double cone, which adjacent to the spindle tip 18 has a small cone angle and, subsequently, a large cone angle.
  • a wear-resistant insert 39 can be inserted into the spindle-shaped component.
  • the insert 39 may be made of ceramic and is in the first component 31st used.
  • the thread withdrawal channel 10 is made as short as possible.
  • the length of the yarn withdrawal channel 10 from the inlet opening 17 to the outlet opening 38 is about 40 to 60 mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Looms (AREA)

Description

Die Erfindung betrifft ein Luftdüsenspinnaggregat mit einem spindelförmigen Bauteil, das einen Fadenabzugskanal mit einer Eintrittsöffnung aufweist und das ausgehend von einer Betriebsposition, in der sich eine konisch zulaufende Spindelspitze des spindelförmigen Bauteils, die die Eintrittsöffnung des Fadenabzugskanals enthält, in einer Wirbelkammer befindet, in der einem zu verspinnenden Faserverband durch eine rotierende Luftströmung ein Spinndrall erteilbar ist, längs des Fadenabzugskanals und in Fadenabzugsrichtung verschiebbar ist, wobei durch Verschieben des spindelförmigen Bauteils in die genannte Richtung die Spindelspilze aus der Wirbelkammer bewegbar ist.The invention relates to an air jet spinning unit with a spindle-shaped component, which has a thread withdrawal channel with an inlet opening and which is located in a vortex chamber, starting from an operating position in which a tapered spindle tip of the spindle-shaped component, which contains the inlet opening of the thread withdrawal channel To spin fiber structure by a rotating air flow spinning spin can be dispensed, along the yarn withdrawal channel and in the yarn withdrawal direction is displaceable, wherein by moving the spindle-shaped component in the direction mentioned the spindle fungus is movable out of the vortex chamber.

Die Erfindung betrifft ferner ein spindelförmiges Bauteil für ein Luftdüsenspinnaggregat mit einem Fadenabzugskanal, mit einer zylindrischen Gleitfläche für die Aufnahme im Luftdüsenspinnaggregat und mit einer konisch zulaufenden Spindelspitze, die die Eintrittsöffnung des Fadenabzugskanals enthält, wobei das spindelförmige Bauteil eine magnetische Anlagefläche zur Festlegung des spindelförmigen Bauteils in seiner Betriebsposition im Luftdüsenspinnaggregat enthält.The invention further relates to a spindle-shaped component for an air jet spinning unit with a yarn withdrawal channel, with a cylindrical sliding surface for receiving the air jet spinning unit and with a tapered spindle tip containing the inlet opening of the yarn withdrawal channel, wherein the spindle-shaped member has a magnetic bearing surface for fixing the spindle-shaped component in contains its operating position in the air jet spinning unit.

Ein Luftdüsenspinnaggregat der eingangs genannten Art ist aus der DE 10 2004 044 345 A1 bekannt. Zur Bewegung des spindelförmigen Bauteils ist in dem bekannten Luftdüsenspinnaggregat eine Feder und ein Pneumatik-Zylinder integriert. Der komplizierte Aufbau des Luftdüsenspinnaggregats macht die Herstellung aufwendig.An air jet spinning unit of the type mentioned is from the DE 10 2004 044 345 A1 known. To move the spindle-shaped component, a spring and a pneumatic cylinder are integrated in the known air jet spinning unit. The complicated structure of the air jet spinning unit makes the production consuming.

Aus der DE 195 01 545 A1 ist ein Luftdüsenspinnaggregat bekannt, bei der die Bewegungs- und Halteeinrichtungen für das spindelförmige Bauteil nicht im Luftdüsenspinnaggregat integriert sind. Das spindelförmige Bauteil ist mit einem außerhalb des Luftdüsenspinnaggregates angeordneten Zylinder verbunden und kann dadurch längs des Fadenabzugskanals bewegt werden. Beim Bewegen des spindelförmigen Bauteils wird das Luftdüsenspinnaggregat komplett geöffnet. Der externe Pneumatik-Zylinder benötigt sehr viel Bauraum in der Luftdüsenspinnvorrichtung.From the DE 195 01 545 A1 An air jet spinning unit is known in which the movement and holding devices for the spindle-shaped component are not integrated in the air jet spinning unit. The spindle-shaped component is connected to a cylinder arranged outside the air jet spinning unit and can thereby be moved along the yarn withdrawal channel. When moving the spindle-shaped component, the air jet spinning unit is completely opened. The external pneumatic cylinder requires a lot of space in the air jet spinning device.

Schließlich zeigt die EP 1 748 094 A1 eine Spinnvorrichtung zur Herstellung eines Fadens mittels eines umlaufenden Luftstroms, wobei die Luftspinnvorrichtung einen in einem Spinngehäuse angeordneten, um seine Mittellängsachse drehbar gelagerten, hohlen Spinnkonus sowie zur Erzeugung des umlaufenden Luftstromes einen mit Druckluft beaufschlagbaren Düsenblock aufweist. Zudem ist vorgesehen, dass der Spinnkonus über eine magnetische Lageranordnung im hinteren Gehäuseteil so gelagert ist, dass die Einbauwinkellage des Spinnkonus innerhalb der Luftspinnvorrichtung wahlweise einstellbar ist.Finally, the shows EP 1 748 094 A1 a spinning device for producing a thread by means of a circulating air flow, wherein the air spinning device comprises a arranged in a spinning housing, rotatably mounted about its central longitudinal axis, hollow spinning cone and for generating the circulating air flow is acted upon with compressed air nozzle block. In addition, it is provided that the spinning cone is mounted on a magnetic bearing assembly in the rear housing part so that the installation angle position of the spinning cone within the air spinning device is selectively adjustable.

Der Erfindung liegt die Aufgabe zugrunde, ein Luftdüsenspinnaggregat mit vereinfachtem Aufbau zu schaffen.The invention has for its object to provide an air jet spinning unit with a simplified structure.

Die Aufgabe wird dadurch gelöst, dass das Luftdüsenspinnaggregat wenigstens einen Magnet zum Halten des spindelförmigen Bauteils in seiner Betriebsposition, eine mit dem Magnet zusammenwirkende Anlagefläche aus magnetischem Material und einen Hebel aufweist, mit dessen Hilfe das spindelförmige Bauteil ausgehend von seiner Betriebsposition in Fadenabzugsrichtung bewegbar ist, um hierdurch die Spindelspitze aus der Wirbelkammer zu bewegen. Bei dem spindelförmigen Bauteil wird die Aufgabe dadurch gelöst, dass das spindelförmige Bauteil eine Nut aufweist, in die Vorsprünge eines an einem Grundkörper des Luftdüsenspinnaggregats befestigten Hebels zur Bewegung des spindelförmigen Bauteils einklipsbar sind.The object is achieved in that the air jet spinning unit has at least one magnet for holding the spindle-shaped component in its operating position, a bearing surface of magnetic material cooperating with the magnet and with the aid of which the spindle-shaped component is movable starting from its operating position in the yarn withdrawal direction, to thereby move the spindle tip out of the vortex chamber. In the case of the spindle-shaped component, the object is achieved in that the spindle-shaped component has a groove into which projections of a lever fastened to a base body of the air nozzle spinning unit can be clipped in order to move the spindle-shaped component.

Einziges Haltemittel für das spindelförmige Bauteil im Luftdüsenspinnaggregat ist ein Magnet. Selbstverständlich können auch mehrere Magnete vorgesehen sein. Weitere Befestigungsmittel und Haltemittel sind am Luftdüsenspinnaggregat oder an der Spinnvorrichtung nicht erforderlich. Der Herstellungs- und Montageaufwand für das Luftdüsenspinnaggregat wird dadurch sehr stark vereinfacht.The only holding means for the spindle-shaped component in the air jet spinning unit is a magnet. Of course, several magnets can be provided. Other fasteners and retaining means are on the air jet spinning unit or not required on the spinning device. The manufacturing and assembly costs for the air jet spinning unit is thereby greatly simplified.

Das spindelförmige Bauteil wird in seiner Betriebsposition so im Luftdüsenspinnaggregat gehalten, dass sich eine konisch zulaufende Spindelspitze des spindelförmigen Bauteils, die die Eintrittsöffnung des Fadenabzugskanals enthält, in einer Wirbelkammer befindet, In der dem zu verspinnenden Faserverband durch eine rotierende Luftströmung ein Spinndrall erteilt wird. Es ist bekannt, dass im Luftdüsenspinnaggregat Betriebsstörungen auftreten können und die Wirbelkammer gereinigt werden muss. Zur Behebung von Betriebsstörungen wird das spindelförmige Bauteil parallel zum Fadenabzugskanal in Fadenabzugsrichtung verschoben, so dass sich die Spindelspitze aus der Wirbelkammer hinausbewegt. Faseransammlungen in der Wirbelkammer können so beseitigt werden.The spindle-shaped component is held in its operating position in the air jet spinning unit, that a tapered spindle tip of the spindle-shaped component, which contains the inlet opening of the yarn withdrawal channel, is located in a swirl chamber, in which the spin-fiber structure by a rotating air flow spinning spin is granted. It is known that in the air jet spinning unit malfunctions can occur and the vortex chamber must be cleaned. To rectify malfunctions, the spindle-shaped component is moved parallel to the thread withdrawal channel in the thread withdrawal direction, so that the spindle tip moves out of the vortex chamber. Fiber accumulations in the vortex chamber can thus be eliminated.

Die Erfindung hat den Vorteil, dass zur Bewegung des spindelförmigen Bauteils keine komplizierten und/oder sehr viel Platz beanspruchenden Konstruktionen mehr erforderlich sind. Das spindelförmige Bauteil kann in einer einfachen zylindrischen Aufnahme in einem Grundkörper des Luftdüsenspinnaggregats aufgenommen sein und kann entlang der zylindrischen Aufnahme bewegt werden. Zum Halten des spindelförmigen Bauteils in seiner Betriebsposition kann wenigstens ein Magnet in dem Grundkörper angeordnet sein. Der Magnet wirkt mit der magnetischen Anlagefläche am spindelförmigen Bauteil zusammen und hält das spindelförmige Bauteil in seiner Betriebsposition. Gemäß einer anderen vorteilhaften Ausführungsform kann wenigstens ein Magnet an dem spindelförmigen Bauteil oder einem mit diesem verbundenen Halteelement angeordnet sein. Der Magnet wirkt bei diesem Ausführungsbeispiel mit einer magnetischen Anlagefläche am Grundkörper des Luftdüsenspinnaggregats zusammen. Bei beiden Ausführungsformen kann das spindelförmige Bauteil zur Behebung von Betriebsstörungen entgegen der Magnetkraft in Fadenabzugsrichtung längs des Fadenabzugskanals bewegt werden, so dass sich die Spindelspitze aus der Wirbelkammer hinausbewegt.The invention has the advantage that for the movement of the spindle-shaped component no complicated and / or very much space-claiming structures are required. The spindle-shaped component can be accommodated in a simple cylindrical receptacle in a base body of the air jet spinning unit and can be moved along the cylindrical receptacle. For holding the spindle-shaped component in its operating position, at least one magnet can be arranged in the base body. The magnet cooperates with the magnetic abutment surface on the spindle-shaped component and holds the spindle-shaped component in its operating position. According to another advantageous embodiment, at least one magnet can be arranged on the spindle-shaped component or a holding element connected thereto. The magnet cooperates in this embodiment with a magnetic contact surface on the base body of the air jet spinning unit. In both embodiments, the spindle-shaped component can be moved counter to the magnetic force in the yarn withdrawal direction along the yarn withdrawal channel to eliminate malfunction so that the spindle tip moves out of the vortex chamber.

Im einfachsten Fall kann die Bewegung des spindelförmigen Bauteils manuell durch Wartungspersonal erfolgen. Durch die einfachen Befestigung des spindelförmigen Bauteils ist es außerdem möglich, das spindelförmige Bauteil sehr einfach aus dem Luftdüsenspinnaggregat herauszunehmen und gegen ein anderes spindelförmiges Bauteil auszutauschen.In the simplest case, the movement of the spindle-shaped component can be done manually by maintenance personnel. Due to the simple attachment of the spindle-shaped component, it is also possible to very easily remove the spindle-shaped component from the air jet spinning unit and replace it with another spindle-shaped component.

Es kann auch vorteilhaft sein, dass die Bewegung des spindelförmigen Bauteils durch eine entlang der Luftspinnmaschine verfahrbare Wartungseinrichtung, einen sogenannten Serviceroboter, erfolgt.It can also be advantageous that the movement of the spindle-shaped component takes place by means of a maintenance device which can be moved along the air-spinning machine, a so-called service robot.

Erfindungsgemäß ist ein Hebel, insbesondere ein Schwenkhebel, zum Bewegen des spindelförmigen Bauteils vorgesehen. Der Hebel ist am Grundkörper befestigt und am spindelförmigen Bauteil lediglich eingeklipst, so dass das spindelförmige Bauteil immer noch sehr einfach austauschbar ist.According to the invention, a lever, in particular a pivot lever, is provided for moving the spindle-shaped component. The lever is attached to the base body and only clipped on the spindle-shaped component, so that the spindle-shaped component is still very easily replaceable.

Die magnetische Anlagefläche zur Festlegung des spindelförmigen Bauteils in seiner Betriebsposition ist bevorzugt kreisringförmig ausgebildet und kann konzentrisch zur zylindrischen Gleitfläche angeordnet sein. In vorteilhafter Ausgestaltung besteht das spindelförmige Bauteil aus mehreren Komponenten, vorzugsweise aus drei Komponenten. Eine erste Komponente enthält die zylindrische Gleitfläche. Die erste Komponente besteht vorzugsweise aus einem Material, das gute Gleiteigenschaften gegenüber dem Material des Grundkörpers aufweist. Vorteilhaft ist für die erste Komponente ein Kunststoff oder ein Messing- oder Bronzewerkstoff. Die zylindrische Gleitfläche kann auch eine Beschichtung aufweisen. Die zweite Komponente des spindelförmigen Bauteils enthält die konisch zulaufende Spindelspitze mit der Eintrittsöffnung des Fadenabzugskanals. Die konische Außenkontur der zweiten Komponente ist bevorzugt in Bereiche mit unterschiedlicher Konizität unterteilt, wobei der Konuswinkel zur Spindelspitze hin abnimmt. Eine dritte Komponente des spindelförmigen Bauteils kann die magnetische Anlagefläche zur Festlegung des spindelförmigen Bauteils in seiner Betriebsposition enthalten. Die dritte Komponente ist bevorzugt durch einen Stahlring gebildet, der an der ersten Komponente befestigt ist.The magnetic contact surface for fixing the spindle-shaped component in its operating position is preferably annular and may be arranged concentrically to the cylindrical sliding surface. In an advantageous embodiment, the spindle-shaped component consists of several components, preferably of three components. A first component contains the cylindrical sliding surface. The first component preferably consists of a material which has good sliding properties in relation to the material of the main body. Advantageous for the first component is a plastic or a brass or bronze material. The cylindrical sliding surface may also have a coating. The second component of the spindle-shaped component contains the tapered spindle tip with the inlet opening of the thread withdrawal channel. The conical outer contour of the second component is preferably divided into areas with different conicity, wherein the cone angle decreases towards the spindle tip. A third component of the spindle-shaped component may include the magnetic bearing surface for fixing the spindle-shaped component in its operating position. The third component is preferably formed by a steel ring attached to the first component.

Bei einer andere vorteilhaften Ausführungsform ist vorgesehen, dass das spindelförmige Bauteil aus zwei Komponenten besteht. Diese Ausführungsform ist vorteilhaft, wenn die erste Komponente aus einem magnetischen Material, beispielsweise aus Stahl, besteht. Die magnetische Anlagefläche zur Festlegung des spindelförmigen Bauteils in seiner Betriebsposition kann dann in die erste Komponente integriert werden, so dass auf die dritte Komponente verzichtet werden kann. Das spindelförmige Bauteil besteht also aus einer ersten Komponente, die die zylindrische Gleitfläche und die magnetische Anlagefläche enthält, und aus einer zweiten Komponente, die die Spindelspitze enthält.In another advantageous embodiment, it is provided that the spindle-shaped component consists of two components. This embodiment is advantageous if the first component consists of a magnetic material, for example of steel. The magnetic contact surface for fixing the spindle-shaped component in its operating position can then be integrated into the first component, so that it is possible to dispense with the third component. The spindle-shaped component thus consists of a first component containing the cylindrical sliding surface and the magnetic bearing surface, and of a second component containing the spindle tip.

In weiterer vorteilhafter Ausgestaltung kann vorgesehen sein, dass das spindelförmige Bauteil einen in den Fadenabzugskanal mündenden Injektionskanal und einen Druckluftanschluss zur Versorgung des Injektionskanals aufweist. Der Druckluftanschluss ist zur Anbringung eines Druckluftschlauches geeignet. Der Injektionskanal kann für einen Anspinnvorgang mit Druckluft beaufschlagt werden, so dass im Fadenabzugskanal eine definierte Luftströmung entsteht. Durch den Injektionskanal kann eine zur Spindelspitze gerichtete Luftströmung im Fadenabzugskanal erzeugt werden, die zum Zurückführen eines Fadenendes entgegen der Fadenabzugsrichtung durch das Luftdüsenspinnaggregat dient. Es kann auch vorgesehen sein, dass durch den Injektionskanal eine rotierende Luftströmung in dem Fadenabzugskanal erzeugbar ist. Eine rotierende Luftströmung im Fadenabzugskanal ist insbesondere dann vorteilhaft, wenn ein Anspinnvorgang ohne Hilfsfaden durchgeführt werden soll.In a further advantageous embodiment, it can be provided that the spindle-shaped component has an injection channel opening into the thread withdrawal channel and a compressed air connection for supplying the injection channel. The compressed air connection is suitable for attaching a compressed air hose. The injection channel can be acted upon for a piecing process with compressed air, so that in the yarn withdrawal channel creates a defined air flow. Through the injection channel directed to the spindle tip air flow can be generated in the thread withdrawal channel, which serves for returning a thread end counter to the thread take-off direction by the air jet spinning unit. It can also be provided that a rotating air flow in the yarn withdrawal channel can be generated by the injection channel. A rotating air flow in the thread withdrawal channel is particularly advantageous if a piecing without auxiliary thread is to be performed.

Die Erfindung hat den Vorteil, dass die Länge des Fadenabzugskanals im spindelförmigen Bauteil relativ klein sein kann. Ein möglichst kurzer Fadenabzugskanal im spindelförmige Bauteil kann eine Beeinträchtigung der Fadenqualität vermindern, die durch einen übermäßigen Kontakt des ersponnenen Fadens mit der Wandung des Fadenabzugskanals entstehen kann. Vorteilhafterweise beträgt die Länge des Fadenabzugskanals im spindelförmigen Bauteil weniger als 80 mm, und insbesondere weniger als 40 mm.The invention has the advantage that the length of the thread withdrawal channel in the spindle-shaped component can be relatively small. The shortest possible thread withdrawal channel in the spindle-shaped component can reduce a deterioration of the thread quality, which can be caused by excessive contact of the spun thread with the wall of the thread withdrawal channel. Advantageously, the length of the yarn withdrawal channel in the spindle-shaped component is less than 80 mm, and in particular less than 40 mm.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels.Further advantages and features of the invention will become apparent from the following description of an embodiment.

Es zeigen:

  • Figur 1 eine vergrößerte Darstellung eines erfindungsgemäßen Luftdüsenspinnaggregates im Längsschnitt,
  • Figur 2 eine Draufsicht in Richtung des Pfeiles II der Figur 1.
Show it:
  • FIG. 1 an enlarged view of an air jet spinning unit according to the invention in longitudinal section,
  • FIG. 2 a plan view in the direction of arrow II of FIG. 1 ,

Das in Figur 1 dargestellte Luftdüsenspinnaggregat 1 dient dem Herstellen eines gesponnenen Fadens 2 aus einem Stapelfaserverband 3. Dem Luftdüsenspinnaggregat 1 ist ein Streckwerk 4 vorgeordnet.This in FIG. 1 illustrated air jet spinning unit 1 is used to produce a spun yarn 2 from a staple fiber 3. The air jet spinning unit 1 is a drafting 4 upstream.

Der zu verspinnende Stapelfaserverband 3 wird im Streckwerk 4 in Verzugsrichtung A zugeführt und als ersponnener Faden 2 in Fadenabzugsrichtung B abgezogen und an eine nicht dargestellte Aufspuleinrichtung weitergeleitet. Das nur teilweise dargestellte Streckwerk 4 ist vorzugsweise ein Drei-Zylinderstreckwerk und enthält somit insgesamt drei Walzenpaare, die jeweils eine angetriebene Unterwalze und eine als Druckwalze ausgebildete Oberwalze aufweisen. Dargestellt ist lediglich das die Verzugszone des Streckwerks 4 begrenzende Lieferwalzenpaar 5, 6. In einem solchen Streckwerk 4 wird in bekannter Weise der Stapelfasenrerband 3 bis zu einer gewünschten Feinheit verzogen. Im Anschluss an die Klemmlinie des Lieferwalzenpaares 5, 6 des Streckwerks 4 liegt dann ein dünnes Faserbändchen 7 vor, welches fertig verstreckt und noch ungedreht ist.The staple fiber staple 3 is fed in drafting 4 in the direction of delay A and withdrawn as spun yarn 2 in the yarn withdrawal direction B and forwarded to a winding device, not shown. The drafting unit 4, which is only partially shown, is preferably a three-cylinder drafting unit and thus comprises a total of three pairs of rollers, each having a driven lower roller and an upper roller designed as a pressure roller. Shown is only the delay zone of the drafting 4 limiting delivery roller pair 5, 6. In such a drafting 4 is warped in a known manner, the staple Elaband 3 to a desired fineness. Following the nip line of the delivery roller pair 5, 6 of the drafting system 4 is then a thin fiber ribbon 7, which is finished stretched and still untwisted.

Dem Luftdüsenspinnaggregat 1 wird das Faserbändchen 7 über einen Faserzuführkanal 8 zugeführt. Es folgt eine so genannte Wirbelkammer 9, in der dem Faserbändchen 7 die Spinndrehung erteilt wird, so dass der gesponnene Faden 2, der durch einen Fadenabzugskanal 10 abgezogen wird, entsteht.The air jet spinning unit 1, the fiber ribbon 7 is fed via a Faserzuführkanal 8. It follows a so-called vortex chamber 9, in which the fiber ribbon 7, the spinning rotation is granted, so that the spun yarn 2, which is withdrawn through a yarn withdrawal channel 10, is formed.

Eine Fluideinrichtung erzeugt während des Spinnvorganges in der Wirbelkammer 9 durch Einblasen von Druckluft durch tangential in die Wirbelkammer 9 mündende Drurkluftdüsen 11 eine rotierende Wirbelströmung. Die Druckluft wird im Luftdüsenspinnaggregat 1 bei Betrieb über einen Druckluftkanal 12 zugeführt. Vom Druckluftkanal 12 gelangt die Druckluft zunächst in einen die Wirbelkammer 9 umgebenden Ringkanal 13, an welchen die genannten Druckluftdüsen 11 direkt angeschlossen sind. Die aus den Druckluftdüsen 11 austretende Druckluft wird durch einen Abluftkanal 14 abgeführt. Der Abluftkanal 14 ist ringförmig um ein spindelförmiges Bauteil 15 herum angeordnet, das den Fadenabzugskanal 10 enthält. Das spindelförmige Bauteil 15 ist bei Betrieb stationär.A fluid device generates during the spinning process in the vortex chamber 9 by blowing compressed air through tangentially opening into the vortex chamber 9 Drurkluftdüsen 11 a rotating vortex flow. The compressed air is supplied in the air jet spinning unit 1 during operation via a compressed air channel 12. From the compressed air channel 12, the compressed air passes first into a surrounding the vortex chamber 9 annular channel 13, to which said compressed-air nozzles 11 are connected directly. The emerging from the compressed air nozzles 11 compressed air is discharged through an exhaust duct 14. The exhaust duct 14 is annularly arranged around a spindle-shaped component 15 which contains the yarn withdrawal channel 10. The spindle-shaped component 15 is stationary during operation.

Im Bereich der Wirbelkammer 9 ist als Drallsperre eine Kante einer Faserführungsfläche 16 angeordnet, die leicht exzentrisch zum Fadenabzugskanal 10 im Bereich von dessen Eintrittsöffnung 17 angeordnet ist. Die Eintrittsöffnung 17 des Fadenabzugskanals 10 ist an einem konisch zulaufenden Ende des spindelförmigen Bauteils 15 angeordnet. Das konisch zulaufende Ende wird als Spindelspitze 18 bezeichnet.In the area of the swirl chamber 9, an edge of a fiber guide surface 16 is arranged as a swirl barrier, which is arranged slightly eccentrically to the yarn withdrawal channel 10 in the region of its inlet opening 17. The inlet opening 17 of the thread withdrawal channel 10 is arranged at a conically tapering end of the spindle-shaped component 15. The tapered end is referred to as a spindle tip 18.

In dem Luftdüsenspinnaggregat 1 werden die zu verspinnenden Fasern einerseits im Faserbändchen 7 gehalten und so vom Faserzuführkanal 8 im Wesentlichen ohne Drehungsenteilung in die Eintrittsöffnung 17 des Fadenabzugskanals 10 geführt. Andererseits sind die Fasern im Bereich zwischen dem Faserzuführkanal 8 und dem Fadenabzugskanal 10 der Wirkung der Wirbelströmung in der Wirbelkammer 9 ausgesetzt. Durch die Wirbelströmung werden die Fasern oder mindestens ihre Endbereiche von der Eintrittsöffnung 17 radial weggetrieben und um die bereits in den Fadenabzugskanal 10 eintretenden Fasern herumgeschlungen. Die mit dem beschriebenen Luftdüsenspinnaggregate 1 hergestellten Fäden 2 zeigen daher 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 Luftdüsenspinnvorrichtung dieser Art erlaubt sehr hohe Spinngeschwindigkeiten, die in der Größenordnung zwischen 300 und 600 Meter pro Minute liegen.In the air jet spinning unit 1, the fibers to be spun are held on the one hand in the fiber ribbon 7 and thus guided by the Faserzuführkanal 8 substantially without rotation division in the inlet opening 17 of the yarn withdrawal channel 10. On the other hand, the fibers are in the range between the fiber feed channel 8 and the thread withdrawal channel 10 the effect of the vortex flow in the vortex chamber 9 exposed. As a result of the turbulent flow, the fibers or at least their end regions are driven radially away from the inlet opening 17 and wrapped around the fibers already entering the yarn withdrawal channel 10. The yarns 2 made with the described air jet spinning units 1 therefore exhibit a core of fibers or fiber portions extending substantially in the yarn longitudinal direction without substantial rotation and an outer portion in which the fibers or fiber portions are rotated around the core. An air jet spinning device of this type allows very high spinning speeds, which are on the order of between 300 and 600 meters per minute.

Wenn aus irgendeinem Grunde das Faserbändchen 7 oder der Faden 2 bricht, wird zunächst das Streckwerk 4 stillgesetzt und die Zufuhr des Stapelfaserverbandes 3 unterbrochen. Auch die nicht dargestellte Aufspuleinrichtung wird abgeschaltet. Vor einer Wiederinbetriebnahme des Spinnvorgangs kann es erforderlich sein, die Wirbelkammer 9 von dort festhängenden Faserresten zu befreien. Das spindelförmige Bauteil 15 wird hierzu längs des Fadenabzugskanals 10 in Fadenabzugsrichtung B verschoben, so dass sich die Spindelspitze 18 aus der Wirbelkammer 9 herausbewegt. Die Wirbelkammer 9 verstopfende Faseransammlungen können dann über den mit einer nicht dargestellten Unterdruckquelle verbundenen Abluftkanal 14 abgesaugt werden.If, for some reason, the fiber ribbon 7 or the thread 2 breaks, the drafting unit 4 is first stopped and the supply of the staple fiber strand 3 is interrupted. The unwinding device, not shown, is turned off. Before restarting the spinning process, it may be necessary to free the vortex chamber 9 of fiber residues hanging there. For this purpose, the spindle-shaped component 15 is displaced along the yarn withdrawal channel 10 in the yarn withdrawal direction B, so that the spindle tip 18 moves out of the swirl chamber 9. The vortex chamber 9 clogging fiber accumulations can then be sucked off via the connected to a vacuum source, not shown exhaust air duct 14.

Ein Grundkörper 19 des Luftdüsenspinnaggregats 1 weist eine zylindrische Aufnahme 20 auf, in der das spindelförmige Bauteil 15 mit einer zylindrischen Gleitfläche 21 bewegbar eingesetzt ist. Im Grundkörper 20 sind ein oder mehrere Magnete 22, im dargestellten Fall zwei Magnete 22, angeordnet. Das spindelförmige Bauteil 15 weist eine mit dem Magnet 22 zusammenwirkende Anlagefläche 23 aus einem magnetischen Material auf. Die Magnete 22 halten das spindelförmige Bauteil 15 in seiner Betriebsposition. Die magnetische Anlagefläche 23 ist kreisringförmig ausgebildet. Die Anlagefläche 23 und die zylindrische Gleitfläche 21 sind konzentrisch um den Fadenabzugskanal 10 angeordnet.A main body 19 of the air jet spinning unit 1 has a cylindrical receptacle 20, in which the spindle-shaped component 15 is movably inserted with a cylindrical sliding surface 21. In the main body 20, one or more magnets 22, in the illustrated case two magnets 22, are arranged. The spindle-shaped component 15 has a bearing surface 23, which cooperates with the magnet 22, of a magnetic material. The magnets 22 hold the spindle-shaped component 15 in its operating position. The magnetic Contact surface 23 is annular. The contact surface 23 and the cylindrical sliding surface 21 are arranged concentrically around the yarn withdrawal channel 10.

Zum Reinigen der Wirbelkammer 9 kann das spindelförmige Bauteil 15 entgegen der Magnetkraft in Fadenabzugsrichtung B entlang der zylindrischen Gleitfläche 21 bewegt werden. Die Bewegung des spindelförmigen Bauteils 15 kann manuell durch eine Bedienperson oder durch einen entlang der Luftspinnmaschine verfahrbaren Wartungswagen automatisiert erfolgen. Damit das spindelförmige Bauteil 15 leicht ergreifbar ist, ist ein Hebel 24 zum Bewegen des spindelförmigen Bauteils 15 vorgesehen. Der Hebel 24 ist in Figur 2 erkennbar. Der Hebel 24 ist als Schwenkhebel ausgebildet und mittels einer Schwenkachse 25 am Grundkörper 19 des Luftdüsenspinnaggregats 1 befestigt. Der Hebel 24 weist Vorsprünge 26 auf, die in einer Nut 27 des spindelförmigen Bauteils eingeklipst sind. Der Hebel 24 kann manuell oder automatisiert in seinem Griffbereich 28 betätigt werden und bewegt dadurch das spindelförmige Bauteil 15 parallel zum Fadenabzugskanal 10. Der Hebel 24 verhindert gleichzeitig, dass nach Wegbewegen der Anlagefläche 23 aus dem Wirkungsbereich der Magnete 22 das spindelförmige Bauteil 15 von selbst aus der zylindrischen Aufnahme 20 des Grundkörpers 19 herausfällt. Wenn es erforderlich ist, das spindelförmige Bauteil komplett aus dem Luftdüsenspinnaggregat 1 zu entnehmen, kann das spindelförmige Bauteil 15 mit seiner Nut 27 sehr leicht aus dem Hebel 24 ausgeklipst und aus dem Luftdüsenspinnaggregat 1 entnommen werden. Durch ein Zurückschwenken des Hebels 24 wird das spindelförmige Bauteil 15 wieder entgegen der Fadenabzugsrichtung B bewegt und die Spindelspitze 18 gelangt wieder in ihre Betriebsposition in der Wirbelkammer 9. Die Magnete 22 fixieren das spindelförmige Bauteil 15 über die Anlagefläche 23.To clean the vortex chamber 9, the spindle-shaped component 15 can be moved counter to the magnetic force in the yarn withdrawal direction B along the cylindrical sliding surface 21. The movement of the spindle-shaped component 15 can be carried out manually by an operator or by a maintenance trolley movable along the air-spinning machine. In order for the spindle-shaped component 15 to be easily gripped, a lever 24 for moving the spindle-shaped component 15 is provided. The lever 24 is in FIG. 2 recognizable. The lever 24 is designed as a pivot lever and fixed by means of a pivot axis 25 on the base body 19 of the air jet spinning unit 1. The lever 24 has projections 26 which are clipped in a groove 27 of the spindle-shaped component. The lever 24 can be operated manually or automatically in its gripping area 28 and thereby moves the spindle-shaped component 15 parallel to the thread withdrawal channel 10. The lever 24 prevents at the same time that after moving away the contact surface 23 from the sphere of action of the magnets 22, the spindle-shaped member 15 by itself the cylindrical receptacle 20 of the main body 19 falls out. If it is necessary to remove the spindle-shaped component completely from the air jet spinning unit 1, the spindle-shaped component 15 can be easily clipped out of the lever 24 with its groove 27 and removed from the air jet spinning unit 1. By pivoting back the lever 24, the spindle-shaped component 15 is again moved counter to the yarn withdrawal direction B and the spindle tip 18 returns to its operating position in the swirl chamber 9. The magnets 22 fix the spindle-shaped component 15 on the contact surface 23rd

Im spindelförmigen Bauteil 15 ist ein in den Fadenabzugskanal 10 mündender Injektionskanal 29 vorgesehen. Des Weiteren ist ein Druckluftanschluss 30 am spindelförmigen Bauteil 15 vorhanden, der zur Versorgung des Injektionskanals 29 zeitweise mit Druckluft beaufschlagt werden kann. Der Druckluftanschluss 30 wird durch ein Anschlussstück 37 für einen nicht dargestellten Druckluftschlauch gebildet. Der Injektionskanal 29 dient zur Unterstützung eines Anspinnvorganges des Luftdüsenspinnaggregates 1 und kann in der in Figur 1 dargestellten Weise in den Fadenabzugskanal 10 münden, so dass die durch den Injektionskanal 29 einströmende Druckluft im Fadenabzugskanal 10 eine entgegen der Fadenabzugsrichtung B gerichtete Luftströmung erzeugt. Hierdurch kann ein Ende eines fertig gesponnen Fadens 2 entgegen der Fadenabzugsrichtung B durch das Luftdüsenspinnaggregat 1 bis in das Streckwerk 4 zurückgeführt und dort mit dem Stapelfaserverband 3 verbunden werden. In nicht dargestellter Ausgestaltung kann der Injektionskanal 29 auch derart in den Fadenabzugskanal 10 münden, dass im Fadenabzugskanal 10 eine rotierende Luftströmung entsteht.In the spindle-shaped component 15 an opening into the thread withdrawal channel 10 injection channel 29 is provided. Furthermore, a compressed air connection 30 is present on the spindle-shaped component 15, which is used to supply the injection channel 29 can be acted upon temporarily compressed air. The compressed air connection 30 is formed by a connecting piece 37 for a compressed air hose, not shown. The injection channel 29 serves to support a piecing process of the air jet spinning unit 1 and can in the in FIG. 1 illustrated manner in the yarn withdrawal channel 10 open, so that the air flowing through the injection channel 29 compressed air in the yarn withdrawal channel 10 generates a counter to the yarn withdrawal direction B directed air flow. In this way, one end of a finished spun yarn 2 against the yarn withdrawal direction B through the air jet spinning unit 1 is returned to the drafting unit 4 and connected there with the staple fiber strand 3. In an embodiment not shown, the injection channel 29 may also open into the thread withdrawal channel 10 in such a way that a rotating air flow is created in the thread withdrawal channel 10.

Das spindelförmige Bauteil 15 besteht aus drei Komponenten 31, 32, 33. Eine erste Komponente 31 des spindelförmigen Bauteils 15 enthält die zylindrische Gleitfläche 21, einen Teil des Fadenabzugskanals 10 und den Druckluftanschluss 30. Wenn ein Hebel 24 vorgesehen ist, enthält die erste Komponente 31 auch die Nut 27. Eine zweite Komponente 32 bildet das konisch zulaufende Ende des spindelförmigen Bauteils 15 und enthält die Spindelspitze 18 und die Eintrittsöffnung 17 des Fadenabzugkanals 10. Der Injektionskanal 29 erstreckt sich vom Druckluftanschluss 30 durch die erste Komponente 31 und die zweite Komponente 32 und mündet innerhalb der zweiten Komponente 32 in den Fadenabzugskanal 10. Die erste Komponente 31 des spindelförmigen Bauteils 15 besteht aus einem Kunststoff. Die zylindrische Gleitfläche 21 hat dadurch gute Gleiteigenschaften gegenüber der Aufnahme 20 im Grundkörper 19. Bevorzugt hat die Gleitfläche 21 einen Durchmesser von 15 bis 20 mm.The spindle-shaped component 15 consists of three components 31, 32, 33. A first component 31 of the spindle-shaped component 15 contains the cylindrical sliding surface 21, a part of the thread withdrawal channel 10 and the compressed air connection 30. If a lever 24 is provided, the first component 31 contains also the groove 27. A second component 32 forms the tapered end of the spindle-shaped member 15 and includes the spindle tip 18 and the inlet opening 17 of the thread withdrawal channel 10. The injection channel 29 extends from the compressed air port 30 through the first component 31 and the second component 32 and opens within the second component 32 in the thread withdrawal channel 10. The first component 31 of the spindle-shaped member 15 is made of a plastic. The cylindrical sliding surface 21 thus has good sliding properties relative to the receptacle 20 in the base body 19. Preferably, the sliding surface 21 has a diameter of 15 to 20 mm.

Es ist eine dritte Komponente 33 des spindelförmigen Bauteils 15 vorgesehen, die die magnetische Anlagefläche 23 enthält. Die dritte Komponente 33 besteht aus einem an der ersten Komponente 31 befestigten Stahlring. Der Stahlring 33 kann beispielsweise auf die zylindrische Gleitfläche 21 aufgepresst oder über nicht dargestellte Gewindestifte befestigt sein. Der Abstand zwischen der Anlagefläche 23 und der Spindelspitze 18 im Bereich der Eintrittsöffnung 17 ist von Bedeutung für die Eigenschaften des ersponnenen Fadens 2. Durch eine Veränderung des Abstandes von der Spindelspitze 18 zur Anlagefläche 23 kann variiert werden, wie weit die Spindelspitze 18 in die Wirbelkammer 9 hineinragt. Unterschiedliche Masse lassen sich beispielsweise erreichen, wenn bei ansonsten gleichbleibenden Abmessungen lediglich die Höhe des Stahlringes 33 verändert wird. Dabei können Stahlringe 33 mit unterschiedlichen Höhenabmessungen verwendet werden oder es kann durch eine Verwendung von Unterlegscheiben zwischen der ersten Komponente 31 und dem Stahlring 33 die Position der Anlagefläche 23 angepasst werden Hierdurch lassen sich auch Toleranzen an dem spindelförmigen Bauteil 15 ausgleichen. Es kann auch ein ansonsten fertiges spindelförmige Bauteil 15 In einem abschließenden Arbeitsgang an der Anlagefläche 23 bearbeitet werden, um einen exakten Abstand der Spindelspitze 18 von der Anlagefläche 23 zu gewährleisten.A third component 33 of the spindle-shaped component 15 is provided, which contains the magnetic contact surface 23. The third component 33 consists of a steel ring attached to the first component 31. Of the Steel ring 33 may, for example, be pressed onto the cylindrical sliding surface 21 or secured by threaded pins, not shown. The distance between the contact surface 23 and the spindle tip 18 in the region of the inlet opening 17 is important for the properties of the spun yarn 2. By changing the distance from the spindle tip 18 to the contact surface 23 can be varied, how far the spindle tip 18 in the vortex chamber 9 protrudes. Different mass can be achieved, for example, if otherwise the same dimensions only the height of the steel ring 33 is changed. In this case, steel rings 33 can be used with different height dimensions or it can be adjusted by a use of washers between the first component 31 and the steel ring 33, the position of the contact surface 23. This also tolerances on the spindle-shaped member 15 can be compensated. It is also possible to machine an otherwise finished spindle-shaped component 15 in a final operation on the abutment surface 23 in order to ensure an exact spacing of the spindle tip 18 from the abutment surface 23.

Die die Spindelspitze 18 enthaltende zweite Komponente 32 ist über zylindrische Aufnahmeflächen 34 in die erste Komponente 31 eingesetzt und durch einen Gewindestift 35 fixiert. Um den Übergang des Injektionskanals 29 von der ersten Komponente 31 in die zweite Komponente 32 abzudichten, können den Aufnahmeflächen 34 Dichtringe 36 zugeordnet sein. Die zweite Komponente 32 kann in nicht dargestellter Ausgestaltung auch in die erste Komponente 31 eingepresst sein, dann könnte der Gewindestift 35 und die Dichtringe 36 entfallen. Die zweite Komponente 32 weist an Ihrer Außenkontur einen doppelten Konus auf, der benachbart zur Spindelspitze 18 einen kleinen Konuswinkel und daran anschließend einen großen Konuswinkel aufweist.The spindle component 18 containing the second component 32 is inserted via cylindrical receiving surfaces 34 in the first component 31 and fixed by a threaded pin 35. In order to seal the transition of the injection channel 29 from the first component 31 into the second component 32, the receiving surfaces 34 may be associated with sealing rings 36. The second component 32 can also be pressed into the first component 31 in an embodiment not shown, then the threaded pin 35 and the sealing rings 36 could be dispensed with. The second component 32 has on its outer contour a double cone, which adjacent to the spindle tip 18 has a small cone angle and, subsequently, a large cone angle.

Im Bereich der Austrittsöffnung 38 des Fadenabzugskanals 10 kann ein verschleißfester Einsatz 39 in das spindelförmige Bauteil eingesetzt sein. Der Einsatz 39 kann aus Keramik bestehen und ist in die erste Komponente 31 eingesetzt. Zur Vermeidung negativer Einflüsse auf den Faden 2 ist der Fadenabzugskanal 10 möglichst kurz ausgestaltet. Die Länge des Fadenabzugskanals 10 von der Eintrittsöffnung 17 zur Austrittsöffnung 38 beträgt etwa 40 bis 60 mm.In the region of the outlet opening 38 of the thread withdrawal channel 10, a wear-resistant insert 39 can be inserted into the spindle-shaped component. The insert 39 may be made of ceramic and is in the first component 31st used. To avoid negative influences on the thread 2, the thread withdrawal channel 10 is made as short as possible. The length of the yarn withdrawal channel 10 from the inlet opening 17 to the outlet opening 38 is about 40 to 60 mm.

Claims (12)

  1. An airjet spinning unit (1) with a spindle-shaped component (15) comprising a yarn withdrawal channel (10) with an entry opening (17) and being movable along the yarn withdrawal channel (10) and in the direction of the yarn draw-off starting from an operating position in which a conically tapering spindle tip (18) of the spindle-shaped component (15), which spindle tip (18) is containing the entry opening (17) of the yarn withdrawal channel (10), is located in a vortex chamber (9), where a fibre strand (7) to be spun receives a spinning twist by a rotating air flow, wherein by moving the spindle-shaped component (15) in the said direction the spindle tip (18) can be moved out of the vortex chamber (9), characterized in that the airjet spinning unit (1) comprises at least one magnet (22) for holding the spindle-shaped component (15) in its operating position, a contact surface (23) made from a magnetic material which interacts with the magnet (22), and a lever (24) for moving the spindle-shaped component (15) starting from its operating position in the yarn draw-off direction (B) to move the spindle tip (18) out of the vortex chamber (9).
  2. An airjet spinning unit according to claim 1, characterized in that the magnet (22) is arranged in a base body (19) of the airjet spinning unit (1).
  3. An airjet spinning unit according to claim 1, characterized in that a magnet (22) is arranged on the spindle-shaped component (15).
  4. An airjet spinning unit according to any one of the claims 1 to 3, characterized in that the airjet spinning unit (1) comprises a cylindrical holding fixture (20) for the spindle-shaped component (15), said spindie-shaped component (15) being movable along said holding fixture (20).
  5. An airjet spinning unit according to any one of the claims 1, 2 or 4, characterized in that the spindle-shaped component (15) comprises the contact surface (23) made from a magnetic material which interacts with the magnet (22).
  6. A spindle-shaped component for an airjet spinning unit (1) comprising a yarn withdrawal channel (10) with a cylindrical sliding surface (21) for mounting in the airjet spinning unit (1) and with a conically tapering spindle tip (18) which comprises an entry opening (17) of the yarn withdrawal channel (10), wherein the spindle-shaped component (15) comprises a magnetic contact surface (23) for fixing the spindle-shaped component (15) in its operating position in the airjet spinning unit (1), characterized in that the spindle-shaped component (15) comprises a groove (27) where projecting elements (26) of a lever (24) can be clipped in, which lever (24) for moving the spindle-shaped component (15) is fixed on the base body of the airjet spinning unit (1).
  7. A spindle-shaped component according to claim 6, characterized in that the magnetic contact surface (23) is annular in shape.
  8. A spindle-shaped component according to claim 6 or 7, characterized in that the magnetic contact surface (23) is arranged concentrically to the cylindrical sliding surface (21).
  9. A spindle-shaped component according to any one of the claims 6 to 8, characterized in that the spindle-shaped component (15) comprises an injector channel (29) which runs into the yarn withdrawal channel (10), and also comprises a compressed air supply (30) for supplying the injection channel (29).
  10. A spindle-shaped component according to any one of the claims 6 to 9, characterized in that the spindle-shaped component (15) consists of three components (31, 32, 33), wherein a first component (31) comprises the cylindrical sliding surface (21), wherein a second component (32) comprises the spindle tip (18), and wherein a third component (33) comprises the magnetic contact surface (23).
  11. A spindle-shaped component according to claim 10, characterized in that the first component (31) is made from a synthetic material.
  12. A spindle-shaped component according to claim 10 or 11, characterized in that the third component (33) is a steel ring fixed to the first component (31).
EP09778486.2A 2008-09-29 2009-09-11 Air jet spinning unit having spindle-shaped component Active EP2329066B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008050874A DE102008050874A1 (en) 2008-09-29 2008-09-29 Air jet spinning unit with spindle-shaped component
PCT/EP2009/006611 WO2010034416A1 (en) 2008-09-29 2009-09-11 Air jet spinning unit having spindle-shaped component

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EP2329066A1 EP2329066A1 (en) 2011-06-08
EP2329066B1 true EP2329066B1 (en) 2014-08-13

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US (1) US20110173945A1 (en)
EP (1) EP2329066B1 (en)
JP (1) JP2012504194A (en)
KR (1) KR20110060961A (en)
CN (1) CN102165111B (en)
DE (1) DE102008050874A1 (en)
WO (1) WO2010034416A1 (en)

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Publication number Publication date
CN102165111B (en) 2016-01-27
EP2329066A1 (en) 2011-06-08
KR20110060961A (en) 2011-06-08
JP2012504194A (en) 2012-02-16
WO2010034416A1 (en) 2010-04-01
US20110173945A1 (en) 2011-07-21
DE102008050874A1 (en) 2010-04-01
CN102165111A (en) 2011-08-24

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