EP1845180B1 - Spindle shaped component for an air jet spinning device with an injection channel - Google Patents

Spindle shaped component for an air jet spinning device with an injection channel Download PDF

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Publication number
EP1845180B1
EP1845180B1 EP07003847A EP07003847A EP1845180B1 EP 1845180 B1 EP1845180 B1 EP 1845180B1 EP 07003847 A EP07003847 A EP 07003847A EP 07003847 A EP07003847 A EP 07003847A EP 1845180 B1 EP1845180 B1 EP 1845180B1
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EP
European Patent Office
Prior art keywords
tip
spindle
injection channel
shaped component
channel
Prior art date
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Not-in-force
Application number
EP07003847A
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German (de)
French (fr)
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EP1845180A3 (en
EP1845180A2 (en
Inventor
Gerd Stahlecker
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP1845180A2 publication Critical patent/EP1845180A2/en
Publication of EP1845180A3 publication Critical patent/EP1845180A3/en
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    • 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 spindle-shaped component for an air jet spinning device having a base body and an attached tip and extending through the base body and tip Garnabzugskanal having an inlet disposed in the tip inlet, wherein the spindle-shaped member has at least one opening into the Garnabzugskanal injection channel in Direction of the inlet opening of the Garnabzugskanals is directed.
  • the invention further relates to a tip and a base body for such a spindle-shaped component.
  • a spindle-shaped component of this type is characterized by the DE 10 2004 044 345 A1 State of the art.
  • a fiber ribbon of staple fibers is fed to an air jet spinning device and there gives the spin rotation.
  • the fiber ribbon is first passed through a Faserzu Glasskanal the air jet spinning device in a vortex chamber, which is associated with a fluid means for generating a vortex flow around an inlet opening of a Garnabzugskanals around.
  • an injection channel is arranged in the spindle-shaped component, which opens into the Garnabzugskanal and directed against the inlet opening of Garnabzugskanals.
  • This injection channel is acted upon in a piecing process with compressed air, so that arises in the air jet spinning device running counter to the spinning direction air flow.
  • the yarn end passed through the air jet spinning device can then be deflected in a manner known per se and prepared accordingly, so that it can be connected to a newly supplied fiber ribbon. After attaching the fiber ribbon to this yarn end of the spinning process is restored.
  • the known spindle-shaped component has the disadvantage that the opening into the Garnabzugskanal injection channel is formed by a very thin bore.
  • the bore for the injection channel is arranged in a patch on a base body of the spindle-shaped component tip.
  • the bore of the injection channel is drilled at an acute angle to the Garnabzugskanal and usually has a diameter of a few tenths of a millimeter.
  • the preparation of this injection channel is very complex, especially since often the tip of the spindle-shaped component consists of a hard and wear-resistant material.
  • the invention is based on the object to simplify the manufacturability of a spindle-shaped component of the type mentioned.
  • the at least one injection channel is formed by a surface region of the base body and by a surface region of the tip.
  • an injection channel is seen in its cross section not only surrounded by one of the components body or tip, but of both simultaneously.
  • a part of the peripheral wall of the injection channel is formed by the main body and another part of the peripheral wall of the injection channel through the tip.
  • an injection channel is formed by a cone-shaped surface area of the base body and / or by a cone-shaped surface area of the tip.
  • a cone-shaped surface area can be particularly well-established that the opening into the Garnabzugskanal injection channel is directed towards the inlet opening of the Garnabzugskanals, and that the required during piecing, directed against the spin direction air flow in the air jet spinning device, especially in Garnabzugskanal, reliably formed when the injection channel is pressurized with compressed air.
  • a cone-shaped surface area of the body or tip is achieved that the injection channel extends at an acute angle to the Garnabzugskanal, at least in a region shortly before the injection channel opens into the Garnabzugskanal.
  • the injection channel is formed on the finished spindle-shaped component by a cone-shaped surface portion of the tip, which has a defined distance from a cone-shaped surface portion of the base body.
  • a groove-shaped surface area in the respective other component is assigned to a cone-shaped surface area in the tip or base body.
  • air jet spinning device 1 is used to produce a spun yarn 2 from a fiber ribbon 3 of staple fibers.
  • the air jet spinning device 1 is preceded by a drafting unit 4 that produces the thin fiber ribbon 3 from a staple fiber strand 5 and delivers it to the air jet spinning device 1.
  • the staple fiber strand 5 to be spun is fed in drafting device 4 in the direction of delay A and warped in a known manner to a desired fineness.
  • the drafting unit 4 only partially shown is preferably a four-cylinder drafting system and thus contains a total of four pairs of rollers, each having a driven lower roller and a trained as a pressure roller upper roller. Shown is only the delay zone of the drafting 4 limiting delivery roller pair 6, 7. Following the drafting 4 then there is a thin fiber ribbon 3, which is stretched and still untwisted.
  • the air jet spinning device 1 is fed to the fiber ribbon 3 via a fiber feed channel 8. It follows a so-called vortex chamber 9, in which the fiber ribbon 3, the spinning rotation is given, so that the spun yarn 2 is formed, which is deducted by a Garnabzugskanal 10 in withdrawal direction B and fed to a winding device, not shown.
  • the Garnabzugskanal 10 is arranged in a spindle-shaped, stationary during operation component 11, which consists of a base body 12 and a tip 13. Der GrundMech 12 und die Spitze 13 Sind in den Figuren skilled.
  • the Garnabzugskanal 10 has an arranged in the tip 13 inlet opening 14 for the resulting yarn 2.
  • a fluid device generates during the spinning process in the vortex chamber 9 by blowing compressed air through tangentially into the vortex chamber 9 opening compressed air nozzles 15 a Vortex flow.
  • the emerging from the compressed air nozzles 15 compressed air is discharged through an exhaust duct 16, which has an annular cross-section around the spindle-shaped member 11 around which contains the Garnabzugskanal 10.
  • the exhaust duct 16 is for this purpose connected in a manner not shown with a vacuum source.
  • an edge of a fiber guide surface 17 is arranged as a swirl barrier, which is arranged slightly eccentrically to the yarn withdrawal channel 10 in the region of its inlet opening 14.
  • the fibers to be spun are held on the one hand in the fiber ribbon 3 and thus guided by the Faserzu Foodkanal 8 substantially without rotation in the Garnabzugskanal 10, on the other hand, the fibers in the area between the Faserzu Georgiakanal 8 and the Garnabzugskanal 10 are exposed to the effect of vortex flow. By this, the fibers or at least their end portions are driven away radially from the inlet opening 14 of the Garnabzugskanals 10.
  • the yarns 2 made with the described air jet spinning apparatus 1 therefore exhibit a core of substantially longitudinally extending fibers or fiber portions without substantial rotation and an outer portion in which the fibers or fiber portions are rotated about the core.
  • An air jet spinning device 1 of this type allows very high spinning speeds, which are on the order of between 300 and 600 m per minute.
  • the compressed air emerging from the compressed air nozzles 15 in the vortex chamber 9 compressed air is supplied to the air jet spinning device 1 during operation via a compressed air channel 18 and the annular chamber 19 surrounding the vortex chamber 9. If, for some reason, the fiber ribbon 3 or the yarn 2 breaks, this compressed air nozzles 15 supplying compressed air is first turned off. At the same time, the drives of the drafting system 4 and the Garnabzugswalzen not shown, and the winding device can be switched off.
  • the spindle-shaped component 11 may for this purpose contain a piston-like component 20, so that the movement away of the spindle-shaped component 11 can be carried out with very simple means.
  • An annular channel 21 is arranged around the spindle-shaped component 11, which can be acted upon with compressed air.
  • the compressed air in the annular channel 21 presses the piston-like component 20 fixedly attached to the main body 12 of the spindle-shaped component 11 against the force of a spring 22 in the view of FIG FIG. 1 up.
  • the tip 13 of the spindle-shaped component 11 with the inlet opening 14 of the Garnabzugskanals 10 is thereby moved away from the fiber feed channel 8 and the fiber guide surface 17, so that more space is created in the vortex chamber 9.
  • possibly present in the vortex chamber fiber residues can be sucked through the exhaust duct 16.
  • the spring 22 pushes the spindle-shaped member 11 back into its operating position.
  • the injection channel 23 is acted upon during the piecing process with compressed air and generates an air flow in Garnabzugskanal 10 and in the fiber feed channel 8, which runs counter to the spinning direction to the drafting unit 4 out. It is important that the injection channel 23 is at an acute angle to the Garnabzugskanal 10 before it opens into this, so that the injection effect in Garnabzugskanal 10 is sufficiently large to ensure a safe suction of the traversed end of the yarn 2. It may be advantageous to pressurize the injection channel 23 with compressed air even during the described cleaning process in order to facilitate the cleaning of the vortex chamber 9.
  • the injection channel 23 is formed by a surface region 24 of the main body 12 and by a surface region 25 of the tip 13.
  • the spindle-shaped component 11 is composed of the components base body 12 and tip 13. This is advantageous since the tip 13 is subject to high wear, in particular in the region of the inlet opening 14 of the yarn withdrawal channel 10, and is therefore expediently made of a wear-resistant material.
  • the attachment of the tip 13 may, for example via a press fit or via a thread on the receiving part 26.
  • a sealing ring 27 may be provided, which may for example consist of copper.
  • the inventive design of the injection channel 23 ensures particularly easy manufacturability of the spindle-shaped component 11, since the surface region 24 is machined during the production of the base body 12, while the surface region 25 is processed during the production of the tip 13.
  • the surface regions 24 and 25 of the injection channel 23 are thus processed separately from one another prior to assembly of the spindle-shaped component 11 and yield the injection channel 23 only when the tip 13 and main body 12 are joined together.
  • the injection channel 23 with its small cross-section is therefore not produced as a whole, but arises only when the surface areas 24 and 25 are assigned to each other during assembly of the spindle-shaped member 11.
  • a part of its peripheral wall is formed by the surface region 24 of the base body 12 and another part of its peripheral wall by the surface region 25 of the tip 13.
  • the surface region 24 of the main body 12 is designed in the shape of a cone shell, so that the injection channel 23 extends at an acute angle to the yarn withdrawal channel 10 and is directed in the direction of the inlet opening 14.
  • the surface region 25 may be groove-shaped in the tip 13.
  • the groove-shaped surface area 25 is associated with the cone-shaped surface area 24, whereby the injection channel 23 is formed.
  • the surface region 25 may also have a cone-shaped shape and surround the cone-shaped surface region 24 at a small distance. This is indicated by the reference numeral 25 'by dashed lines.
  • a groove 28 extending parallel to the yarn withdrawal channel 10 is provided in the tip 13 in the region of the receiving part 26, which groove is connected to an annular channel 29 and an intermediate channel 30.
  • the intermediate channel 30 is in turn connected to a base body 12 of the spindle-shaped member 11 surrounding annular channel 31 in connection, which can be supplied via a supply line 32 with the necessary compressed air.
  • a groove-shaped surface region 25 at the tip 13 it may be advantageous to arrange a plurality of groove-shaped surface regions 25 and correspondingly, of course, grooves 28 around the yarn withdrawal channel 10.
  • four groove-shaped surface regions 25 may be uniformly arranged around the yarn withdrawal channel 10.
  • the groove-shaped surface regions 25 on the tip 13 and the groove 28 can be produced particularly advantageously without cutting on the tip 13. This is possible for example by an embossing process or a direct production of the tip 13 in a mold.
  • the preparation of the tip 13 is characterized in contrast to the above-mentioned prior art very easily possible.
  • FIG. 2 another embodiment of the spindle-shaped member 11 and the injection channel 23 is shown.
  • the same components have the same reference numerals as in FIG. 1 on. To avoid repetition, reference is therefore made to the description there.
  • a groove 33 is provided in the base body 12 in the region of the receiving part 26 in order to supply the injection channel 23 with compressed air from the annular channel 29.
  • the injection channel 23 is formed by a cone-shaped surface region 35 of the tip 13 and by a groove-shaped surface region 34 of the base body 12.
  • the attachment of the groove 33 and the groove-shaped surface region 34 in the base body 12 may be advantageous if the tip 13 consists of a material which is difficult to form, for example ceramic.
  • the groove-shaped surface region 34 is assigned to the base body 12 during assembly of the tip 13 to the cone-shaped surface area 35, so that the injection channel 23 is formed.
  • the surface region 34 of the base body 12 is also formed cone-shaped, and is arranged at a small distance from the cone-shaped surface portion 35. This in turn results in an annular injection channel 23 which is indicated by the reference numeral 34 'by dashed lines.
  • the groove 33 or the groove-shaped surface region 34 on the base body 12 can advantageously be produced by milling. As in FIG. 1 Of course, here too, a plurality of grooves 33 or groove-shaped surface regions 34 can be arranged around the yarn withdrawal channel 10.

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

Abstract

The spindle-shaped component (11) comprises a yarn withdrawal channel (10) extending through a base and a tip (13) attached to the base. An injection channel formed in the surface of the base and the tip, which runs into the yarn withdrawal channel, is directed in the direction of the entry opening (14) of the yarn withdrawal channel. An independent claim is included for tip of spindle-shaped component.

Description

Die Erfindung betrifft ein spindelförmiges Bauteil für eine Luftdüsenspinnvorrichtung mit einem Grundkörper und einer aufgesetzten Spitze sowie mit einem durch Grundkörper und Spitze verlaufenden Garnabzugskanal, der eine in der Spitze angeordnete Eintrittsöffnung aufweist, wobei das spindelförmige Bauteil wenigstens einen in den Garnabzugskanal mündenden Injektionskanal aufweist, der in Richtung der Eintrittsöffnung des Garnabzugskanals gerichtet ist.The invention relates to a spindle-shaped component for an air jet spinning device having a base body and an attached tip and extending through the base body and tip Garnabzugskanal having an inlet disposed in the tip inlet, wherein the spindle-shaped member has at least one opening into the Garnabzugskanal injection channel in Direction of the inlet opening of the Garnabzugskanals is directed.

Die Erfindung betrifft ferner eine Spitze und einen Grundkörper für ein derartiges spindelförmiges Bauteil.The invention further relates to a tip and a base body for such a spindle-shaped component.

Ein spindelförmiges Bauteil dieser Art ist durch die DE 10 2004 044 345 A1 Stand der Technik. Während des Spinnvorganges wird ein Faserbändchen aus Stapelfasern einer Luftdüsenspinnvorrichtung zugeführt und dort die Spinndrehung erteilt. Hierzu wird das Faserbändchen durch einen Faserzuführkanal der Luftdüsenspinnvorrichtung zunächst in eine Wirbelkammer geführt, der eine Fluideinrichtung zum Erzeugen einer Wirbelströmung um eine Eintrittsöffnung eines Garnabzugskanals herum zugeordnet ist. Dabei werden zunächst die vorderen Enden der im Faserbändchen gehaltenen Fasern in den Garnabzugskanal geführt, während hintere freie Faserenden abgespreizt, von der Wirbelströmung erfasst und um die sich bereits in der Eintrittsöffnung des Garnabzugskanals befindlichen, also eingebundenen vorderen Enden herumgedreht werden, wodurch ein Garn mit weitgehend echter Drehung erzeugt wird.A spindle-shaped component of this type is characterized by the DE 10 2004 044 345 A1 State of the art. During the spinning process, a fiber ribbon of staple fibers is fed to an air jet spinning device and there gives the spin rotation. For this purpose, the fiber ribbon is first passed through a Faserzuführkanal the air jet spinning device in a vortex chamber, which is associated with a fluid means for generating a vortex flow around an inlet opening of a Garnabzugskanals around. In this case, first the front ends of the fibers held in the fiber ribbon are guided into the Garnabzugskanal while splayed rear free fiber ends, detected by the vortex flow and are already turned around the already located in the inlet opening of the Garnabzugskanals, thus integrated front ends, whereby a yarn with largely true rotation is generated.

Wenn aus irgendeinem Grund das noch sehr schwache ungedrehte Faserbändchen oder das ersponnene Garn bricht, muss ein Ansetzvorgang stattfinden, bei welchem das Ende des bereits ersponnenen Garnes durch die Luftdüsenspinnvorrichtung zurückgeführt wird. Hierzu ist in dem spindelförmigen Bauteil ein Injektionskanal angeordnet, der in den Garnabzugskanal mündet und gegen die Eintrittsöffnung des Garnabzugskanals gerichtet ist. Dieser Injektionskanal wird bei einem Ansetzvorgang mit Druckluft beaufschlagt, so dass in der Luftdüsenspinnvorrichtung eine entgegen der Spinnrichtung verlaufende Luftströmung entsteht. Durch die Injektionswirkung kann ein bereits gesponnener Faden in den Garnabzugskanal eingesaugt und entgegen der normalen Spinnrichtung durch die Luftdüsenspinnvorrichtung transportiert werden. Das durch die Luftdüsenspinnvorrichtung hindurchgeführte Fadenende kann dann in an sich bekannter Weise abgelenkt und entsprechend vorbereitet werden, so dass es mit einem neu zugeführten Faserbändchen verbunden werden kann. Nach dem Ansetzen des Faserbändchens an dieses Fadenende ist der Spinnvorgang wieder hergestellt.If, for some reason, the still very weak untwisted fiber ribbon or spun yarn breaks, a piecing operation must take place in which the end of the already spun yarn is returned by the air jet spinner. For this purpose, an injection channel is arranged in the spindle-shaped component, which opens into the Garnabzugskanal and directed against the inlet opening of Garnabzugskanals. This injection channel is acted upon in a piecing process with compressed air, so that arises in the air jet spinning device running counter to the spinning direction air flow. By the injection effect, an already spun yarn can be sucked into the Garnabzugskanal and transported against the normal spinning direction by the air jet spinning device. The yarn end passed through the air jet spinning device can then be deflected in a manner known per se and prepared accordingly, so that it can be connected to a newly supplied fiber ribbon. After attaching the fiber ribbon to this yarn end of the spinning process is restored.

Das bekannte spindelförmige Bauteil hat dabei den Nachteil, dass der in den Garnabzugskanal mündenden Injektionskanal durch eine sehr dünne Bohrung gebildet wird. Die Bohrung für den Injektionskanal ist in einer auf einen Grundkörper des spindelförmigen Bauteiles aufgesetzten Spitze angeordnet. Die Bohrung des Injektionskanals ist in einem spitzen Winkel zum Garnabzugskanal gebohrt und weist üblicherweise einen Durchmesser von einigen Zehntel Millimetern auf. Die Herstellung dieses Injektionskanals ist sehr aufwändig, zumal oftmals die Spitze des spindelförmigen Bauteils aus einem harten und verschleißfesten Material besteht.The known spindle-shaped component has the disadvantage that the opening into the Garnabzugskanal injection channel is formed by a very thin bore. The bore for the injection channel is arranged in a patch on a base body of the spindle-shaped component tip. The bore of the injection channel is drilled at an acute angle to the Garnabzugskanal and usually has a diameter of a few tenths of a millimeter. The preparation of this injection channel is very complex, especially since often the tip of the spindle-shaped component consists of a hard and wear-resistant material.

Aus der DE 103 49 651 A1 ist eine andere Art eines spindelförmigen Bauteils für eine Luftdüsenspinnvorrichtung bekannt, bei der ein anders verlaufender Injektionskanal vorgesehen ist. Der Injektionskanal mündet rechtwinklig in einen Garnabzugskanal und ist somit nicht in Richtung der Eintrittsöffnung des Garnabzugskanals gerichtet. Diese Anordnung des Injektionskanals hat den Nachteil, dass die Injektionswirkung der Druckluftströmung im Garnabzugskanal schlechter ist, so dass ein für einen Ansetzvorgang benötigtes Fadenende nicht immer sicher entgegen der Spinnrichtung in den Garnabzugskanal eingesaugt und durch die Luftdüsenspinnvorrichtung transportiert werden kann. Durch den senkrecht in den Garnabzugskanal mündenden Injektionskanal kann es nämlich passieren, dass die einströmende Druckluft auch in Spinnrichtung durch den Garnabzugskanal strömt, und somit keine durchgängig entgegen der Spinnrichtung verlaufende Luftströmung in der Luftdüsenspinnvorrichtung entsteht.From the DE 103 49 651 A1 Another type of spindle-shaped component for an air jet spinning device is known in which a differently extending injection channel is provided. The injection channel opens at right angles into a Garnabzugskanal and is thus not directed in the direction of the inlet opening of the Garnabzugskanals. This arrangement of the injection channel has the disadvantage that the injection effect of the compressed air flow in the Garnabzugskanal is worse, so that a required for a piecing yarn end can not always be safely sucked against the spinning direction in the Garnabzugskanal and transported through the air jet spinning device. By virtue of the injection channel opening perpendicularly into the yarn withdrawal channel, it can happen that the incoming compressed air also flows through the yarn withdrawal channel in the direction of spinning, and thus no air flow running continuously in the direction of the spinning direction occurs in the air jet spinning device.

Der Erfindung liegt die Aufgabe zu Grunde, die Herstellbarkeit eines spindelförmigen Bauteiles der eingangs genannten Art zu vereinfachen.The invention is based on the object to simplify the manufacturability of a spindle-shaped component of the type mentioned.

Die Aufgabe wird dadurch gelöst, dass der wenigstens eine Injektionskanal durch einen Oberflächenbereich des Grundkörpers und durch einen Oberflächenbereich der Spitze gebildet wird.The object is achieved in that the at least one injection channel is formed by a surface region of the base body and by a surface region of the tip.

Durch diese Ausführung wird ein Injektionskanal in seinem Querschnitt gesehen nicht nur von einer der Komponenten Grundkörper oder Spitze umgeben, sondern von beiden gleichzeitig. Ein Teil der Umfangswand des Injektionskanals wird durch den Grundkörper und ein anderer Teil der Umfangswand des Injektionskanals durch die Spitze gebildet. Das hat den Vorteil, dass der Injektionskanal weder im Grundkörper noch in der Spitze komplett vorhanden ist. Der Injektionskanal entsteht erst beim Zusammenfügen der Spitze mit dem Grundkörper bei der Montage des spindelförmigen Bauteils. Es lassen sich somit die Oberflächenbereiche des Grundkörpers und diejenigen Oberflächenbereiche der Spitze, die später im montierten Zustand den Injektionskanal bilden jeweils an Grundkörper und an der Spitze getrennt herstellen und bearbeiten. Die Herstellung wird dadurch vereinfacht, da die sehr dünne Bohrung nicht mehr erforderlich ist.By this embodiment, an injection channel is seen in its cross section not only surrounded by one of the components body or tip, but of both simultaneously. A part of the peripheral wall of the injection channel is formed by the main body and another part of the peripheral wall of the injection channel through the tip. This has the advantage that the injection channel is completely absent neither in the main body nor in the tip. The injection channel is formed only when assembling the tip with the main body during assembly of the spindle-shaped component. It can thus be the surface areas of the body and those surface areas of the tip, which later in the assembled state, the injection channel form each separate base body and at the top and edit. The production is simplified because the very thin bore is no longer required.

Es ist vorteilhaft, wenn ein Injektionskanal durch einen kegelmantelförmige ausgebildeten Oberflächenbereich des Grundkörpers und/oder durch einen kegelmantelförmig ausgebildeten Oberflächenbereich der Spitze gebildet wird. Durch einen kegelmantelförmig ausgebildeten Oberflächenbereich kann besonders gut gewährleistet werden, dass der in den Garnabzugskanal mündende Injektionskanal in Richtung der Eintrittsöffnung des Garnabzugskanals gerichtet ist, und dass die beim Ansetzvorgang benötigte, entgegen der Spinnrichtung gerichtete Luftströmung in der Luftdüsenspinnvorrichtung, insbesondere im Garnabzugskanal, zuverlässig gebildet wird, wenn der Injektionskanal mit Druckluft beaufschlagt wird. Durch einen kegelmantelförmig ausgebildeten Oberflächenbereich an Grundkörper oder Spitze wird erreicht, dass der Injektionskanal in einem spitzen Winkel zum Garnabzugskanal verläuft, und zwar wenigstens in einem Bereich kurz bevor der Injektionskanal in den Garnabzugskanal mündet.It is advantageous if an injection channel is formed by a cone-shaped surface area of the base body and / or by a cone-shaped surface area of the tip. By a cone-shaped surface area can be particularly well-established that the opening into the Garnabzugskanal injection channel is directed towards the inlet opening of the Garnabzugskanals, and that the required during piecing, directed against the spin direction air flow in the air jet spinning device, especially in Garnabzugskanal, reliably formed when the injection channel is pressurized with compressed air. By a cone-shaped surface area of the body or tip is achieved that the injection channel extends at an acute angle to the Garnabzugskanal, at least in a region shortly before the injection channel opens into the Garnabzugskanal.

Es kann dabei vorgesehen sein, dass der Injektionskanal am fertigen spindelförmigen Bauteil durch einen kegelmantelförmig ausgebildeten Oberflächenbereich der Spitze gebildet wird, der einen definierten Abstand zu einem kegelmantelförmig ausgebildeten Oberflächenbereich des Grundkörpers aufweist. In Ausgestaltung der Erfindung kann auch vorgesehen sein, dass einem kegelmantelförmig ausgebildeten Oberflächenbereich in Spitze oder Grundkörper ein nutförmiger Oberflächenbereich in der jeweiligen anderen Komponente zugeordnet ist.It may be provided that the injection channel is formed on the finished spindle-shaped component by a cone-shaped surface portion of the tip, which has a defined distance from a cone-shaped surface portion of the base body. In an embodiment of the invention, it can also be provided that a groove-shaped surface area in the respective other component is assigned to a cone-shaped surface area in the tip or base body.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung einiger Ausführungsbeispiele.Further advantages and features of the invention will become apparent from the following description of some embodiments.

Es zeigen:

  • Figur 1 in stark vergrößerter Darstellung einen Axialschnitt durch ein spindelförmiges Bauteil und eine zugehörige Luftdüsenspinnvorrichtung bei Betrieb,
  • Figur 2 eine Ansicht ähnlich Figur 1 auf eine andere Ausgestaltung eines spindelförmigen Bauteils.
Show it:
  • FIG. 1 in greatly enlarged view an axial section through a spindle-shaped component and an associated air jet spinning device during operation,
  • FIG. 2 a view similar FIG. 1 to another embodiment of a spindle-shaped component.

Die in Figur 1 dargestellte Luftdüsenspinnvorrichtung 1 dient dem Herstellen eines gesponnenen Garnes 2 aus einem Faserbändchen 3 aus Stapelfasern. Der Luftdüsenspinnvorrichtung 1 ist ein Streckwerk 4 vorgeordnet, dass das dünne Faserbändchen 3 aus einem Stapelfaserverband 5 erzeugt und an die Luftdüsenspinnvorrichtung 1 liefert.In the FIG. 1 shown air jet spinning device 1 is used to produce a spun yarn 2 from a fiber ribbon 3 of staple fibers. The air jet spinning device 1 is preceded by a drafting unit 4 that produces the thin fiber ribbon 3 from a staple fiber strand 5 and delivers it to the air jet spinning device 1.

Der zu verspinnende Stapelfaserverband 5 wird im Streckwerk 4 in Verzugsrichtung A zugeführt und in bekannter Weise bis zu einer gewünschten Feinheit verzogen. Das nur teilweise dargestellte Streckwerk 4 ist vorzugsweise ein Vier-Zylinder-Streckwerk und enthält somit insgesamt vier Walzenpaare, die jeweils eine angetriebene Unterwalze und eine als Druckwalze ausgebildete Oberwalze aufweisen. Dargestellt ist lediglich das die Verzugszone des Streckwerks 4 begrenzende Lieferwalzenpaar 6, 7. Im Anschluss an das Streckwerk 4 liegt dann ein dünnes Faserbändchen 3 vor, welches verstreckt und noch ungedreht ist.The staple fiber strand 5 to be spun is fed in drafting device 4 in the direction of delay A and warped in a known manner to a desired fineness. The drafting unit 4 only partially shown is preferably a four-cylinder drafting system and thus contains a total of four pairs of rollers, each having a driven lower roller and a trained as a pressure roller upper roller. Shown is only the delay zone of the drafting 4 limiting delivery roller pair 6, 7. Following the drafting 4 then there is a thin fiber ribbon 3, which is stretched and still untwisted.

Der Luftdüsenspinnvorrichtung 1 wird das Faserbändchen 3 über einen Faserzuführkanal 8 zugeführt. Es folgt eine so genannte Wirbelkammer 9, in der dem Faserbändchen 3 die Spinndrehung erteilt wird, so dass das gesponnene Garn 2 entsteht, das durch ein Garnabzugskanal 10 in Abzugsrichtung B abgezogen und einer nicht dargestellten Aufspuleinrichtung zugeführt wird.The air jet spinning device 1 is fed to the fiber ribbon 3 via a fiber feed channel 8. It follows a so-called vortex chamber 9, in which the fiber ribbon 3, the spinning rotation is given, so that the spun yarn 2 is formed, which is deducted by a Garnabzugskanal 10 in withdrawal direction B and fed to a winding device, not shown.

Der Garnabzugskanal 10 ist in einem spindelförmigen, bei Betrieb stationären Bauteil 11 angeordnet, das aus einem Grundkörper 12 und einer Spitze 13 besteht. Der Garnabzugskanal 10 weist eine in der Spitze 13 angeordnete Eintrittsöffnung 14 für das entstehende Garn 2 auf.The Garnabzugskanal 10 is arranged in a spindle-shaped, stationary during operation component 11, which consists of a base body 12 and a tip 13. Der Grundkörper 12 und die Spitze 13 sind in den Figuren dargestellt. The Garnabzugskanal 10 has an arranged in the tip 13 inlet opening 14 for the resulting yarn 2.

Eine Fluideinrichtung erzeugt während des Spinnvorganges in der Wirbelkammer 9 durch Einblasen von Druckluft durch tangential in die Wirbelkammer 9 mündende Druckluftdüsen 15 eine Wirbelströmung. Die aus den Druckluftdüsen 15 austretende Druckluft wird durch einen Abluftkanal 16 abgeführt, wobei dieser einen ringförmigen Querschnitt um das spindelförmige Bauteil 11 herum aufweist, das den Garnabzugskanal 10 enthält. Der Abluftkanal 16 ist hierzu in nicht dargestellter Weise mit einer Unterdruckquelle verbunden.A fluid device generates during the spinning process in the vortex chamber 9 by blowing compressed air through tangentially into the vortex chamber 9 opening compressed air nozzles 15 a Vortex flow. The emerging from the compressed air nozzles 15 compressed air is discharged through an exhaust duct 16, which has an annular cross-section around the spindle-shaped member 11 around which contains the Garnabzugskanal 10. The exhaust duct 16 is for this purpose connected in a manner not shown with a vacuum source.

Im Bereich der Wirbelkammer 9 ist als Drallsperre eine Kante einer Faserführungsfläche 17 angeordnet, die leicht exzentrisch zum Garnabzugskanal 10 im Bereich von dessen Eintrittsöffnung 14 angeordnet ist.In the area of the vortex chamber 9, an edge of a fiber guide surface 17 is arranged as a swirl barrier, which is arranged slightly eccentrically to the yarn withdrawal channel 10 in the region of its inlet opening 14.

In der Luftdüsenspinnvorrichtung 1 werden die zu verspinnenden Fasern einerseits im Faserbändchen 3 gehalten und so vom Faserzuführkanal 8 im Wesentlichen ohne Drehungserteilung in den Garnabzugskanal 10 geführt, andererseits sind die Fasern in dem Bereich zwischen dem Faserzuführkanal 8 und dem Garnabzugskanal 10 der Wirkung der Wirbelströmung ausgesetzt. Durch diese werden die Fasern oder mindestens ihre Endbereiche von der Eintrittsöffnung 14 des Garnabzugskanals 10 radial weggetrieben. Die mit der beschriebenen Luftdüsenspinnvorrichtung 1 hergestellten Garne 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 1 dieser Art erlaubt sehr hohe Spinngeschwindigkeiten, die in der Größenordnung zwischen 300 und 600 m pro Minute liegen.In the air jet spinning apparatus 1, the fibers to be spun are held on the one hand in the fiber ribbon 3 and thus guided by the Faserzuführkanal 8 substantially without rotation in the Garnabzugskanal 10, on the other hand, the fibers in the area between the Faserzuführkanal 8 and the Garnabzugskanal 10 are exposed to the effect of vortex flow. By this, the fibers or at least their end portions are driven away radially from the inlet opening 14 of the Garnabzugskanals 10. The yarns 2 made with the described air jet spinning apparatus 1 therefore exhibit a core of substantially longitudinally extending fibers or fiber portions without substantial rotation and an outer portion in which the fibers or fiber portions are rotated about the core. An air jet spinning device 1 of this type allows very high spinning speeds, which are on the order of between 300 and 600 m per minute.

Die aus den Druckluftdüsen 15 in die Wirbelkammer 9 austretende Druckluft wird der Luftdüsenspinnvorrichtung 1 bei Betrieb über einen Druckluftkanal 18 und einen die Wirbelkammer 9 umgebenden Ringkanal 19 zugeführt. Wenn nun aus irgendeinem Grund das Faserbändchen 3 oder das Garn 2 bricht, wird zunächst diese die Druckluftdüsen 15 speisende Druckluft abgeschaltet. Gleichzeitig können die Antriebe des Streckwerks 4 und der nicht dargestellten Garnabzugswalzen und der Aufspuleinrichtung abgeschaltet werden.The compressed air emerging from the compressed air nozzles 15 in the vortex chamber 9 compressed air is supplied to the air jet spinning device 1 during operation via a compressed air channel 18 and the annular chamber 19 surrounding the vortex chamber 9. If, for some reason, the fiber ribbon 3 or the yarn 2 breaks, this compressed air nozzles 15 supplying compressed air is first turned off. At the same time, the drives of the drafting system 4 and the Garnabzugswalzen not shown, and the winding device can be switched off.

Bevor nun der notwendige Ansetzvorgang durchgeführt wird, kann es vorteilhaft sein, das spindelförmige Bauteil 11 kurzzeitig zu Reinigungszwecken von dem Faserzuführkanal 8 wegzubewegen. Im Betriebszustand besteht ein sehr kleiner Abstand zwischen der Eintrittsöffnung 14 des Garnabzugskanals 10 und der Faserführungsfläche 17, der beispielsweise 0,5 mm betragen kann. Das spindelförmige Bauteil 11 kann hierzu eine kolbenartige Komponente 20 enthalten, so dass das Wegbewegen des spindelförmigen Bauteils 11 mit sehr einfachen Mitteln durchführbar ist. Um das spindelförmige Bauteil 11 herum ist ein Ringkanal 21 angeordnet, der mit Druckluft beaufschlagt werden kann. Die Druckluft im Ringkanal 21 drückt die fest am Grundkörper 12 des spindelförmigen Bauteils 11 befestigte kolbenartige Komponente 20 gegen die Kraft einer Feder 22 in der Ansicht der Figur 1 nach oben. Die Spitze 13 des spindelförmigen Bauteils 11 mit der Eintrittsöffnung 14 des Garnabzugskanals 10 wird dadurch vom Faserzuführkanal 8 und der Faserführungsfläche 17 wegbewegt, so dass in der Wirbelkammer 9 mehr Raum entsteht. Hierdurch können eventuell in der Wirbelkammer vorhandene Faserreste über den Abluftkanal 16 abgesaugt werden. Nach Abschalten der Druckluft im Ringkanal 21 drückt die Feder 22 das spindelförmige Bauteil 11 wieder in seine Betriebsposition zurück.Before now the necessary piecing process is carried out, it may be advantageous to temporarily move the spindle-shaped component 11 away from the fiber feed channel 8 for cleaning purposes. In operation, there is a very small distance between the inlet opening 14 of the Garnabzugskanals 10 and the fiber guide surface 17, which may be for example 0.5 mm. The spindle-shaped component 11 may for this purpose contain a piston-like component 20, so that the movement away of the spindle-shaped component 11 can be carried out with very simple means. An annular channel 21 is arranged around the spindle-shaped component 11, which can be acted upon with compressed air. The compressed air in the annular channel 21 presses the piston-like component 20 fixedly attached to the main body 12 of the spindle-shaped component 11 against the force of a spring 22 in the view of FIG FIG. 1 up. The tip 13 of the spindle-shaped component 11 with the inlet opening 14 of the Garnabzugskanals 10 is thereby moved away from the fiber feed channel 8 and the fiber guide surface 17, so that more space is created in the vortex chamber 9. As a result, possibly present in the vortex chamber fiber residues can be sucked through the exhaust duct 16. After switching off the compressed air in the annular channel 21, the spring 22 pushes the spindle-shaped member 11 back into its operating position.

Zum Wiederherstellen des Spinnvorgangs ist nun ein Ansetzvorgang notwenig, bei dem ein Ende eines bereits gesponnenen Garnes 2 entgegen der Abzugsrichtung B durch den Garnabzugskanal 10 und dann weiter entgegen der Spinnrichtung durch die gesamte Luftdüsenspinnvorrichtung 1 bis zu dem Streckwerk 4 zurückgeführt wird. Das durch die Luftdüsenspinnvorrichtung 1 zurückgeführte Ende des Garnes 2 kann dann im Streckwerk 4 mit dem Faserbändchen 3 verbunden und der Spinnvorgang wieder gestartet werden. Zum Zurückführen des Garnes 2 bei dem Ansetzvorgang ist ein Injektionskanal 23 in dem spindelförmigen Bauteil 11 vorgesehen, der in den Garnabzugskanal 10 mündet und der gegen die Eintrittsöffnung 14 gerichtet ist. Der Injektionskanal 23 wird während des Ansetzvorganges mit Druckluft beaufschlagt und erzeugt eine Luftströmung im Garnabzugskanal 10 und im Faserzuführkanal 8, die entgegen der Spinnrichtung zum Streckwerk 4 hin verläuft. Es ist dabei wichtig, dass der Injektionskanal 23 in einem spitzen Winkel zu dem Garnabzugskanal 10 verläuft, bevor er in diesen einmündet, damit die Injektionswirkung im Garnabzugskanal 10 ausreichend groß ist, um ein sicheres Einsaugen des zurückzuführenden Endes des Garnes 2 zu gewährleisten. Es kann vorteilhaft sein, den Injektionskanal 23 auch während des beschriebenen Reinigungsvorganges schon mit Druckluft zu beaufschlagen, um die Reinigung der Wirbelkammer 9 zu erleichtern.To restore the spinning process, a piecing operation is now necessary, in which one end of an already spun yarn 2 is fed back against the withdrawal direction B through the yarn withdrawal channel 10 and then further counter to the spinning direction through the entire air jet spinning device 1 up to the drafting device 4. The returned by the air jet spinning device 1 end of the yarn 2 can then be connected in the drafting 4 with the fiber ribbon 3 and the spinning process can be restarted. For returning the yarn 2 in the piecing process, an injection channel 23 is provided in the spindle-shaped component 11, which opens into the Garnabzugskanal 10 and which is directed against the inlet opening 14. The injection channel 23 is acted upon during the piecing process with compressed air and generates an air flow in Garnabzugskanal 10 and in the fiber feed channel 8, which runs counter to the spinning direction to the drafting unit 4 out. It is important that the injection channel 23 is at an acute angle to the Garnabzugskanal 10 before it opens into this, so that the injection effect in Garnabzugskanal 10 is sufficiently large to ensure a safe suction of the traversed end of the yarn 2. It may be advantageous to pressurize the injection channel 23 with compressed air even during the described cleaning process in order to facilitate the cleaning of the vortex chamber 9.

Erfindungsgemäß ist nun vorgesehen, dass der Injektionskanal 23 durch einen Oberflächenbereich 24 des Grundkörpers 12 und durch einen Oberflächenbereich 25 der Spitze 13 gebildet wird. Das spindelförmige Bauteil 11 ist aus den Komponenten Grundkörper 12 und Spitze 13 zusammengesetzt. Dies ist vorteilhaft, da die Spitze 13 insbesondere im Bereich der Eintrittsöffnung 14 des Garnabzugskanals 10 einem hohen Verschleiß unterliegt und deshalb zweckmäßig aus einem verschleißfesten Werkstoff hergestellt ist. Es ist ein im Wesentlichen zylindrischer Aufnahmeteil 26 vorgesehen, über den die Spitze 13 mit dem Grundkörper 12 verbunden ist. Die Befestigung der Spitze 13 kann dabei beispielsweise über einen Presssitz oder über ein Gewinde am Aufnahmeteil 26 erfolgen. Zur Abdichtung zwischen Grundkörper 12 und Spitze 13 kann ein Dichtring 27 vorgesehen sein, der beispielsweise aus Kupfer bestehen kann.According to the invention, it is now provided that the injection channel 23 is formed by a surface region 24 of the main body 12 and by a surface region 25 of the tip 13. The spindle-shaped component 11 is composed of the components base body 12 and tip 13. This is advantageous since the tip 13 is subject to high wear, in particular in the region of the inlet opening 14 of the yarn withdrawal channel 10, and is therefore expediently made of a wear-resistant material. It is provided a substantially cylindrical receiving part 26, via which the tip 13 is connected to the base body 12. The attachment of the tip 13 may, for example via a press fit or via a thread on the receiving part 26. For sealing between base body 12 and tip 13, a sealing ring 27 may be provided, which may for example consist of copper.

Durch die erfindungsgemäße Ausgestaltung des Injektionskanals 23 wird eine besonders einfache Herstellbarkeit des spindelförmigen Bauteils 11 gewährleistet, da der Oberflächenbereich 24 bei der Herstellung des Grundkörpers 12 bearbeitet wird, während der Oberflächenbereich 25 bei der Herstellung der Spitze 13 bearbeitet wird. Die Oberflächenbereiche 24 und 25 des Injektionskanals 23 werden also vor der Montage des spindelförmigen Bauteils 11 getrennt voneinander bearbeitet und ergeben erst bei der Zusammenfügung von Spitze 13 und Grundkörper 12 den Injektionskanal 23. Der Injektionskanal 23 mit seinem geringen Querschnitt wird also nicht als Ganzes hergestellt, sondern entsteht erst wenn die Oberflächenbereiche 24 und 25 bei der Montage des spindelförmigen Bauteils 11 einander zugeordnet werden. Betrachtet man den Injektionskanals 23 in seinem Querschnitt, so wird ein Teil seiner Umfangswand durch den Oberflächenbereich 24 des Grundkörpers 12 und ein anderer Teil seiner Umfangswand durch den Oberflächenbereich 25 der Spitze 13 gebildet.The inventive design of the injection channel 23 ensures particularly easy manufacturability of the spindle-shaped component 11, since the surface region 24 is machined during the production of the base body 12, while the surface region 25 is processed during the production of the tip 13. The surface regions 24 and 25 of the injection channel 23 are thus processed separately from one another prior to assembly of the spindle-shaped component 11 and yield the injection channel 23 only when the tip 13 and main body 12 are joined together. The injection channel 23 with its small cross-section is therefore not produced as a whole, but arises only when the surface areas 24 and 25 are assigned to each other during assembly of the spindle-shaped member 11. Considering the injection channel 23 in its cross section, a part of its peripheral wall is formed by the surface region 24 of the base body 12 and another part of its peripheral wall by the surface region 25 of the tip 13.

Der Oberflächenbereich 24 des Grundkörpers 12 ist kegelmantelförmig ausgebildet, so dass der Injektionskanal 23 in einem spitzen Winkel zum Garnabzugskanal 10 verläuft und in Richtung der Eintrittsöffnung 14 gerichtet ist. Der Oberflächenbereich 25 kann nutförmig in der Spitze 13 ausgebildet sein. Der nutförmige Oberflächenbereich 25 ist dem kegelmantelförmigen Oberflächenbereich 24 zugeordnet, wodurch der Injektionskanal 23 entsteht. Alternativ kann der Oberflächenbereich 25 ebenfalls kegelmantelförmig ausgebildet und in einem geringen Abstand den kegelmantelförmigen Oberflächenbereich 24 umgeben. Dies ist mit dem Bezugszeichen 25' gestrichelt angedeutet. Hierdurch würde statt eines einzelnen Injektionskanals 23 ein ringförmig um den Garnabzugskanal 10 verlaufender Injektionskanal 23 entstehen.The surface region 24 of the main body 12 is designed in the shape of a cone shell, so that the injection channel 23 extends at an acute angle to the yarn withdrawal channel 10 and is directed in the direction of the inlet opening 14. The surface region 25 may be groove-shaped in the tip 13. The groove-shaped surface area 25 is associated with the cone-shaped surface area 24, whereby the injection channel 23 is formed. Alternatively, the surface region 25 may also have a cone-shaped shape and surround the cone-shaped surface region 24 at a small distance. This is indicated by the reference numeral 25 'by dashed lines. As a result, instead of a single injection channel 23, an injection channel 23 extending annularly around the yarn withdrawal channel 10 would be created.

Zur Zuführung der Druckluft zum Injektionskanal 23 ist in der Spitze 13 im Bereich des Aufnahmeteils 26 eine parallel zum Garnabzugskanal 10 verlaufende Nut 28 vorgesehen, die mit einem Ringkanal 29 und einem Zwischenkanal 30 verbunden ist. Der Zwischenkanal 30 steht wiederum mit einem den Grundkörper 12 des spindelförmigen Bauteils 11 umgebenden Ringkanal 31 in Verbindung, der über eine Zuleitung 32 mit der notwendigen Druckluft versorgt werden kann. Im Falle eines nutförmigen Oberflächenbereiches 25 an der Spitze 13 kann es vorteilhaft sein, rund um den Garnabzugskanal 10 mehrere nutförmige Oberflächenbereiche 25 und entsprechend natürlich Nuten 28 anzuordnen. Beispielsweise können vier nutförmige Oberflächenbereiche 25 gleichmäßig um den Garnabzugskanals 10 herum angeordnet sein.For supplying the compressed air to the injection channel 23, a groove 28 extending parallel to the yarn withdrawal channel 10 is provided in the tip 13 in the region of the receiving part 26, which groove is connected to an annular channel 29 and an intermediate channel 30. The intermediate channel 30 is in turn connected to a base body 12 of the spindle-shaped member 11 surrounding annular channel 31 in connection, which can be supplied via a supply line 32 with the necessary compressed air. In the case of a groove-shaped surface region 25 at the tip 13, it may be advantageous to arrange a plurality of groove-shaped surface regions 25 and correspondingly, of course, grooves 28 around the yarn withdrawal channel 10. For example, four groove-shaped surface regions 25 may be uniformly arranged around the yarn withdrawal channel 10.

Die nutförmigen Oberflächenbereiche 25 an der Spitze 13 sowie die Nut 28 können besonders vorteilhaft spanlos an der Spitze 13 erzeugt werden. Dies ist beispielsweise durch einen Prägevorgang oder eine direkte Herstellung der Spitze 13 in einem Formwerkzeug möglich. Die Herstellung der Spitze 13 ist dadurch im Gegensatz zu dem eingangs genannten Stand der Technik sehr einfach möglich.The groove-shaped surface regions 25 on the tip 13 and the groove 28 can be produced particularly advantageously without cutting on the tip 13. This is possible for example by an embossing process or a direct production of the tip 13 in a mold. The preparation of the tip 13 is characterized in contrast to the above-mentioned prior art very easily possible.

In Figur 2 ist eine andere Ausgestaltung des spindelförmigen Bauteils 11 und des Injektionskanals 23 dargestellt. Gleiche Bauteile weisen dabei dieselben Bezugszeichen wie in Figur 1 auf. Zur Vermeidung von Wiederholungen wird deshalb auf die dortige Beschreibung verwiesen.In FIG. 2 another embodiment of the spindle-shaped member 11 and the injection channel 23 is shown. The same components have the same reference numerals as in FIG. 1 on. To avoid repetition, reference is therefore made to the description there.

In dem in Figur 2 dargestellten Fall ist eine Nut 33 in dem Grundkörper 12 im Bereich des Aufnahmeteils 26 vorgesehen, um den Injektionskanal 23 vom Ringkanal 29 aus mit Druckluft zu versorgen. Der Injektionskanal 23 wird durch einen kegelmantelförmigen Oberflächenbereich 35 der Spitze 13 und durch einen nutförmigen Oberflächenbereich 34 des Grundkörpers 12 gebildet. Die Anbringung der Nut 33 und des nutförmigen Oberflächenbereiches 34 im Grundkörper 12 kann vorteilhaft sein, wenn die Spitze 13 aus einem schwer formbaren Werkstoff, beispielsweise Keramik, besteht. Der nutförmige Oberflächenbereich 34 wird bei der Montage der Spitze 13 auf den Grundkörper 12 dem kegelmantelförmig ausgebildeten Oberflächenbereich 35 zugeordnet, so dass der Injektionskanal 23 entsteht.In the in FIG. 2 In the case shown, a groove 33 is provided in the base body 12 in the region of the receiving part 26 in order to supply the injection channel 23 with compressed air from the annular channel 29. The injection channel 23 is formed by a cone-shaped surface region 35 of the tip 13 and by a groove-shaped surface region 34 of the base body 12. The attachment of the groove 33 and the groove-shaped surface region 34 in the base body 12 may be advantageous if the tip 13 consists of a material which is difficult to form, for example ceramic. The groove-shaped surface region 34 is assigned to the base body 12 during assembly of the tip 13 to the cone-shaped surface area 35, so that the injection channel 23 is formed.

Alternativ kann auch bei der Ausführung nach Figur 2 wiederum vorgesehen sein, dass der Oberflächenbereich 34 des Grundkörpers 12 ebenfalls kegelmantelförmig ausgebildet ist, und in einem geringen Abstand zu dem kegelmantelförmigen Oberflächenbereich 35 angeordnet ist. Hierdurch ergibt sich wiederum ein ringförmiger Injektionskanal 23 der gestrichelt durch das Bezugszeichen 34' angedeutet ist. Die Nut 33 bzw. der nutförmige Oberflächenbereich 34 am Grundkörper 12 können vorteilhafterweise durch Fräsen hergestellt werden. Wie bei Figur 1 erwähnt, können selbstverständlich auch hier mehrere Nuten 33 bzw. nutförmige Oberflächenbereiche 34 um den Garnabzugskanal 10 herum angeordnet werden.Alternatively, also in the execution after FIG. 2 be provided again that the surface region 34 of the base body 12 is also formed cone-shaped, and is arranged at a small distance from the cone-shaped surface portion 35. This in turn results in an annular injection channel 23 which is indicated by the reference numeral 34 'by dashed lines. The groove 33 or the groove-shaped surface region 34 on the base body 12 can advantageously be produced by milling. As in FIG. 1 Of course, here too, a plurality of grooves 33 or groove-shaped surface regions 34 can be arranged around the yarn withdrawal channel 10.

Claims (7)

  1. Spindle-shaped component (11) for an air jet spinning device (1) with a basic element (12) and an attached tip (13) and with a yarn withdrawal channel (10) passing through the basic element (12) and tip (13) and having an entry opening (14) arranged in the tip (13), the spindle-shaped component (11) having at least one injection channel (23) opening into the yarn withdrawal channel (10) and aligned in the direction of the entry opening (14) of the yarn withdrawal channel (10), wherein the at least one injection channel (23) is formed between the basic element (12) and the tip (13) by a surface area (24; 34) of the basic element (12) and by a surface area (25; 35) of the tip (13).
  2. Spindle-shaped component according to Claim 1, wherein an injection channel (23) is formed by a surface area (24; 34) designed in cone shape of the basic element (12).
  3. Spindle-shaped component according to Claim 1 or Claim 2, wherein an injection channel (23) is formed by a surface area (25; 35) designed in cone shape of the tip (13).
  4. Spindle-shaped component according to one of Claims 1 to 3, wherein an injection channel (23) is formed by a groove-like surface area (25) or the tip (13).
  5. Spindle-shaped component according to one of Claims 1 to 4, wherein an injection channel (23) is formed by a groove-like surface area (24) of the basic element (12).
  6. Tip (13) for a spindle-shaped component (11) of an air jet spinning device (1) with a yarn withdrawal channel (10) having an entry opening (14), wherein a surface area (25; 35) is provided on the tip (13) that forms when joined with a surface area (24; 34) of a basic element (12) for a spindle-shaped component (11) at least one injection channel (23) aligned with the entry opening (14).
  7. Basic element (12) for a spindle-shaped component (11) according to Claim 1 or Claim 2, wherein a surface area (24; 34) is provided on the basic element (12) forms when joined together with a surface area (25; 35) of a tip (13) for a spindle-shaped component (11) at least one injection channel (23).
EP07003847A 2006-04-13 2007-02-26 Spindle shaped component for an air jet spinning device with an injection channel Not-in-force EP1845180B1 (en)

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DE102004044345A1 (en) * 2004-09-09 2006-03-16 Wilhelm Stahlecker Gmbh Air-jet spinning device
DE102005045703A1 (en) * 2005-09-19 2007-03-22 Wilhelm Stahlecker Gmbh Air jet unit for an air jet spinning device
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DE102011053837A1 (en) * 2011-09-21 2013-03-21 Maschinenfabrik Rieter Ag Spinning tip for a hollow spindle of an air-jet spinning machine
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JP6031847B2 (en) * 2012-06-22 2016-11-24 村田機械株式会社 Hollow guide shaft body, pneumatic spinning device, and yarn winding machine including the same
ITUA20163011A1 (en) * 2016-04-29 2017-10-29 Savio Macch Tessili Spa AIR-JET TYPE SPINNING DEVICE

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Also Published As

Publication number Publication date
EP1845180A3 (en) 2008-05-28
US20070227116A1 (en) 2007-10-04
EP1845180A2 (en) 2007-10-17
DE102006018249A1 (en) 2007-10-18
CN101054744A (en) 2007-10-17
DE502007000760D1 (en) 2009-07-09
CN101054744B (en) 2011-11-23
JP2007284861A (en) 2007-11-01
ATE432381T1 (en) 2009-06-15

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