EP1284312B1 - Apparatus for producing spun yarn - Google Patents

Apparatus for producing spun yarn Download PDF

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Publication number
EP1284312B1
EP1284312B1 EP02014499A EP02014499A EP1284312B1 EP 1284312 B1 EP1284312 B1 EP 1284312B1 EP 02014499 A EP02014499 A EP 02014499A EP 02014499 A EP02014499 A EP 02014499A EP 1284312 B1 EP1284312 B1 EP 1284312B1
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EP
European Patent Office
Prior art keywords
wall
turbulence chamber
channel
downstream
chamber
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EP02014499A
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German (de)
French (fr)
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EP1284312A3 (en
EP1284312A2 (en
Inventor
Herbert Dr. Stalder
Peter Anderegg
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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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 a device according to the preamble of the independent Claim.
  • the device is used to produce a spun yarn one of the device fed, loose fiber strand, the fiber strand through a vortex chamber is pulled, in which the fibers of a vortex flow of a fluid exposed and thereby spun into a yarn.
  • Spinning devices of the above type are known, for example from the Publications US-5528895 or US-5647197 (both Murata). These devices have a fiber feed channel and a Garnabzugkanal, wherein the Output region of the fiber feed channel substantially against the Entrance of the Garnabzugkanals is directed and the exit opening of the Fiber feed channel with a distance to the input opening of Garnzugkanals is arranged. In the range of this distance, the vortex flow is generated.
  • a Spin stop means e.g., eccentric edge over which the fibers are pulled, or im essentially concentric pin around which the fibers are guided).
  • the entrance of the Garnabzugkanals usually has the shape of a slender Spindle, around which a drainage channel with a substantially annular Cross section runs.
  • the discharge channel leads from the equipped as a vortex chamber Cavity between fiber feed channel and Garnzugkanal and runs in essentially parallel to the yarn withdrawal channel
  • the vortex chamber has an im is substantially the same diameter as the entrance area of the discharge channel and with nozzles directed tangentially into the chamber for the injection of a fluid (for example air) equipped.
  • the fluid injected into the vortex chamber passes through the bleed passage aspirated, with the vortex flow generated in the vortex chamber around the Continue the yarn removal channel (spindle) into the drainage channel.
  • the vortex chamber and an input region of the discharge channel thus provide a substantially functional unit serving the rotation distribution.
  • the Garnabzugkanal the optionally arranged rotating, can contribute to the rotation, wherein then by various means it is ensured that the fibers against the Outside of the Garnabzugkanals pressed and thereby taken better become.
  • the cross sections of the fiber feed channel, Garnabzugkanal and discharge channel are small compared to the mean length of the fibers to be processed.
  • the length of the Fiber feed channel is designed such that at least a portion of the fibers whose Leading end has already reached the areas of Garnabzugkanals, in Input range of the fiber feed channel is still held (for example, between Delivery rollers of the fiber feed duct upstream drafting).
  • the with the described method produced yarns show because even a core of essentially in Garnvorlindsraum extending fibers or fiber regions without significant Rotation and an outer area in which the fibers or fiber areas around the Core are turned around.
  • This yarn construction comes about after a model explanation by the fact that leading ends of fibers, in particular fibers whose trailing Areas are still held upstream of the fiber feed channel, in the essentially pass directly into the Garnabzugkanal, but that trailing Fiber areas, especially if they are in the entrance area of the Fiber supply channels are no longer held by the vortex effect of the Pulled fiber strand and then rotated around the resulting yarn. It can also occur that leading ends of fibers due to the vortex effect the fiber structure are spread while the trailing end in the central Area of fiber structure remains, resulting in the corresponding yarns observed loops leads.
  • fibers are at the same time both in the resulting yarn integrated, whereby they are pulled into the Garnabzugkanal, as well as the Vortex flow exposed to them centrifugally, ie from the inlet opening of the Thread take-off channel accelerates away and pulls into the drainage channel.
  • the by the Vortex flow from the fiber structure drawn fiber areas form one in the Entrance opening of Garnabzugkanals opening fiber vortex whose longer Sharp spirally outward around the spindle - shaped entrance area of the Garnabzugkanals wind and in this spiral against the force of flow in the Discharge channel to be pulled against the entrance opening of the Garnabzugkanals.
  • the described, known spinning process is characterized in that it is very high spinning speeds allowed (up to ten times higher spinning speeds than for ring spinning process). On the other hand, it turns out to be difficult with the method to avoid a high fiber output and one for a high yarn quality To obtain enough high fiber content in the twisted outer area of the yarn.
  • the Invention is therefore the task of a device for spinning means To create vortex flow, with which device it should be possible, the To reduce fiber disposal over the prior art, the yarn quality should be at least the same.
  • the invention is based on the idea of the vortex chamber and the discharge channel functional in such a way that the fiber vortex does not move downstream into the Drain channel can continue, but on the vortex chamber, that is to one of the Drain channel functionally separated space remains limited.
  • This idea is realized in that the vortex chamber is bounded downstream by a wall and that the fluid is completely discharged through this wall into the discharge channel becomes.
  • In the center of the vortex chamber downstream bounding wall is the Input opening of Garnabzugkanals arranged.
  • the the vortex chamber The downstream wall has no rotation-dividing function, that is to say does not rotate.
  • For the routing of the fluid are in this wall around the Inlet opening of Garnabzugkanals distributed, in the discharge channel or in Discharge channels opening openings provided, which is also an annular Opening can be summarized.
  • FIG. 1 shows the vortex chamber region of a device according to the state of the art, with which a loose fiber structure 2 fed through a fiber feed channel 1 is given a rotation in a vortex chamber 3, resulting in a spun yarn 4 which is drawn off through a yarn withdrawal channel 5 ,
  • the vortex flow is generated in the vortex chamber 3 by injecting a fluid, for example air, through nozzles 6 opening tangentially into the chamber.
  • the fluid is discharged through a bleed passage 7, the bleed passage 7 having an annular cross section around the yarn withdrawal passage 5 and its entrance portion having substantially the same diameter as the swirl chamber 3, so that the swirl flow generated in the swirl chamber continues into the bleed passage and from the fiber structure by the centrifugal effect of the vortex flow leached out fiber regions 8 in the discharge channel sprialförmig outside the spindle-shaped entrance area of Garnabzugkanals 5 put.
  • Swirl chamber 3 and inlet area of the discharge channel 7 constitute a functional unit, so that fibers that are not incorporated into the resulting yarn are likely to be flushed by the fluid into the discharge channel and thereby lost for the resulting yarn.
  • the eccentric to Garnabzugkanal 5 is arranged at the outlet opening 9 of the fiber feed channel 1 at the outlet opening 9 of the fiber feed channel 1 arranged as an anti-rotation means. It is also known as a spin stop agent Insert needle (pin) arranged concentrically to the yarn withdrawal channel, which needle represents a temporary yarn core.
  • FIG. 2 shows a first, exemplary embodiment of the device according to the invention.
  • the swirl chamber region is shown in section, that is to say the exit region of the fiber supply channel 1 with outlet opening 9 and swirl stop means 10 and the entrance region of the yarn withdrawal channel 5 with inlet opening 11, and swirl chamber 3 and outlet channel 7 which, as in FIG having a substantial annular cross-section.
  • Discharge channel 7 Between swirl chamber 3 and discharge channel 7 is a circular disk-shaped wall plate 20 arranged, which carries the input opening 11 of Garnabzugkanals 5 and around this inlet opening 11 distributes a plurality of openings 21 through which the fluid from the vortex chamber 3 enters the discharge channel 7.
  • the Discharge channel 7 with annular cross section also be replaced by a plurality of aligned on the openings 21 discharge channels.
  • the fiber vortex is therefore limited to the Vortex chamber 3 and the entrapped fibers are unable to integrate fibers to keep better in the swirling fiber structure.
  • the fiber density in the vortex chamber 3 is not too large and at the radial Walls of the vortex chamber 3 does not arise too much fiber friction, it is advantageous To increase the radius of the vortex chamber 3 over the prior art to at least one-tenth (advantageously more than one-sixth) of the effective staple length of the fibers to be processed (effective staple length calculated after the formula published in Japanese Utility Model 2,513,582).
  • Friction reducing surface structure e.g., orange peel
  • FIG. 3 shows, as a plan view (viewing direction A in FIG. 2), the wall plate 20 which closes off the vortex chamber 3 of FIG. 2 downstream against the discharge channel 7.
  • the vortex direction is indicated by the arrows F.
  • the openings 21 penetrate the wall plate 20 so skewed that the fluid swirling can flow into the discharge channel without great change in direction and thus generated turbulence.
  • the wall plate 20 shown in plan-parallel in FIGS. 2 and 3 may also have the shape a preferably blunt cone, wherein the input opening 11, the Garnabzugkanals is arranged on the log of the cone.
  • Figures 4 and 5 show in the same way as Figures 2 and 3, a further exemplary embodiment of the inventive device. Identical parts are designated by the same reference numerals as in FIGS. 2 and 3.
  • Figures 4 and 5 differs by the embodiment the wall plate 20, the openings 21 are circumferentially arranged slots.
  • the Discharge channel 7 is again shown with annular cross section, but could also another, suitably connected to the slot-shaped openings subsequent shape.
  • Figures 6 and 7 show, in the same manner of representation as Figures 2 and 4, two further exemplary embodiments of the inventive device.
  • a central part of the wall defining the vortex chamber downstream is formed by the input end face 30 of the Garnabzugkanals 5.
  • a peripheral part adjoins this central part, the openings being arranged in the peripheral part (FIG. 6) or between the central and peripheral part (FIG. 7).
  • Figure 6 shows an embodiment in which the vortex chamber 3 does not extend substantially plane and perpendicular to the axis of the Garnabzugkanals 5, as shown in Figures 2 and 4, but is conical.
  • the central part of the vortex chamber 3 downstream bounding wall forms the Entrance-side end face 30 of Garnabzugkanals 5.
  • One to the central part The peripheral part of this wall forms a perforated ring 31 Function of the discharge channel 7, for example, by the device surrounding airspace.
  • FIG. 7 shows an embodiment in which the wall defining the vortex chamber 3 downstream is again formed by the input end face 30 of the yarn withdrawal channel 5 and a peripheral ring.
  • the openings 21 to the discharge channel 7 together form a single, annular opening which is arranged between the central and peripheral wall part.
  • the annular opening is as narrow as possible and as close as possible possible arranged at the inlet opening 11 of the Garnrabzugkanals 5.

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

Abstract

The spinner, to produce a spun yarn (4) from a loose sliver (2), has an eddy flow, with an eddy chamber (3) between the fiber feed channel (1) and the yarn take-off channel (5). A fluid is delivered by tangential jets (6), which is taken off through an escape channel (7). A downstream wall plate (20) defines the eddy chamber, and separates it from the escape channel but is fitted with a number of openings (21) as passages into the escape channel.

Description

Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des unabhängigen Patentanspruchs. Die Vorrichtung dient zur Herstellung eines gesponnenen Garnes aus einem der Vorrichtung zugeführten, losen Faserverband, wobei der Faserverband durch eine Wirbelkammer gezogen wird, in der die Fasern einer Wirbelströmung eines Fluids ausgesetzt und dadurch zu einem Garn gesponnen werden.The invention relates to a device according to the preamble of the independent Claim. The device is used to produce a spun yarn one of the device fed, loose fiber strand, the fiber strand through a vortex chamber is pulled, in which the fibers of a vortex flow of a fluid exposed and thereby spun into a yarn.

Spinnvorrichtungen der oben genannten Art sind beispielsweise bekannt aus den Publikationen US-5528895 oder US-5647197 (beide Murata). Diese Vorrichtungen weisen einen Faserzuführungskanal und einen Garnabzugkanal auf, wobei der Ausgangsbereich des Faserzuführungskanals im wesentlichen gegen den Eingangsbereich des Garnabzugkanals gerichtet ist und die Ausgangsöffnung des Faserzuführungskanals mit einem Abstand zur Eingangsöffnung des Garnzugkanals angeordnet ist. Im Bereiche dieses Abstandes wird die Wirbelströmung erzeugt. Im Bereiche der Ausgangsöffnung des Faserzuführungskanals ist ferner ein Drallstoppmittel (z.B. exzentrische Kante, über die die Fasern gezogen werden, oder im wesentlichen konzentrischer Pin, um den die Fasern geführt werden) vorgesehen.Spinning devices of the above type are known, for example from the Publications US-5528895 or US-5647197 (both Murata). These devices have a fiber feed channel and a Garnabzugkanal, wherein the Output region of the fiber feed channel substantially against the Entrance of the Garnabzugkanals is directed and the exit opening of the Fiber feed channel with a distance to the input opening of Garnzugkanals is arranged. In the range of this distance, the vortex flow is generated. in the Areas of the exit opening of the fiber feed channel is also a Spin stop means (e.g., eccentric edge over which the fibers are pulled, or im essentially concentric pin around which the fibers are guided).

Der Eingangsbereich des Garnabzugkanals hat üblicherweise die Form einer schlanken Spindel, um die herum ein Ablasskanal mit einem im wesentlichen ringförmigen Querschnitt verläuft. Der Ablasskanal führt aus dem als Wirbelkammer ausgerüsteten Hohlraum zwischen Faserzuführungskanal und Garnzugkanal und verläuft im wesentlichen parallel zum Garnabzugkanal Die Wirbelkammer hat dabei einen im wesentlichen gleichen Durchmesser wie der Eingangsbereich des Ablasskanals und ist mit tangential in die Kammer gerichteten Düsen zum Einblasen eines Fluids (z.B. Luft) ausgerüstet. Das in die Wirbelkammer eingeblasene Fluid wird durch den Ablasskanal abgesaugt, wobei sich die in der Wirbelkammer erzeugte Wirbelströmung um den Garnabzugkanal (Spindel) herum in den Ablasskanal hinein fortsetzt. Die Wirbelkammer und ein Eingangsbereich des Ablasskanals stellen also im wesentlichen eine funktionelle Einheit dar, die der Drehungserteilung dient. Auch der Garnabzugkanal, der gegebenenfalls rotierend angeordnet ist, kann zur Drehungserteilung beitragen, wobei dann mit verschiedenen Mitteln dafür gesorgt wird, dass die Fasern gegen die Aussenseite des Garnabzugkanals gepresst und dadurch besser mitgenommen werden.The entrance of the Garnabzugkanals usually has the shape of a slender Spindle, around which a drainage channel with a substantially annular Cross section runs. The discharge channel leads from the equipped as a vortex chamber Cavity between fiber feed channel and Garnzugkanal and runs in essentially parallel to the yarn withdrawal channel The vortex chamber has an im is substantially the same diameter as the entrance area of the discharge channel and with nozzles directed tangentially into the chamber for the injection of a fluid (for example air) equipped. The fluid injected into the vortex chamber passes through the bleed passage aspirated, with the vortex flow generated in the vortex chamber around the Continue the yarn removal channel (spindle) into the drainage channel. The vortex chamber and an input region of the discharge channel thus provide a substantially functional unit serving the rotation distribution. Also the Garnabzugkanal, the optionally arranged rotating, can contribute to the rotation, wherein then by various means it is ensured that the fibers against the Outside of the Garnabzugkanals pressed and thereby taken better become.

Die Querschnitte von Faserzuführungskanal, Garnabzugkanal und Ablasskanal sind verglichen mit der mittleren Länge der zu verarbeitenden Fasern klein. Die Länge des Faserzuführungskanals ist derart ausgelegt, dass mindestens ein Teil der Fasern, deren vorlaufendes Ende bereits im Bereiche des Garnabzugkanals angelangt ist, im Eingangsbereich des Faserzuführungskanals noch gehalten wird (z.B. zwischen Lieferwalzen eines dem Faserzuführungskanal vorgeschalteten Streckwerkes).The cross sections of the fiber feed channel, Garnabzugkanal and discharge channel are small compared to the mean length of the fibers to be processed. The length of the Fiber feed channel is designed such that at least a portion of the fibers whose Leading end has already reached the areas of Garnabzugkanals, in Input range of the fiber feed channel is still held (for example, between Delivery rollers of the fiber feed duct upstream drafting).

Fasern, die einer Vorrichtung, wie sie oben kurz beschrieben ist, zugeführt werden, werden einerseits im Faserverband gehalten und von der Ausgangsöffnung des Faserzuführungskanals im wesentlichen ohne Drehungserteilung in den Garnabzugkanal geführt. Andererseits sind die Fasern aber im Bereich zwischen Faserzuführungskanal und Garnabzugkanal der zentrifugalen Wirkung der Wirbelströmung ausgesetzt, durch die sie von der Eingangsöffnung des Garnabzugkanals radial weggetrieben werden. Die mit dem beschriebenen Verfahren hergestellten Garne zeigen denn auch einen Kern von im wesentlichen in Garnlängsrichtung verlaufenden Fasern oder Faserbereichen ohne wesentliche Drehung und einen äusseren Bereich, in dem die Fasern oder Faserbereiche um den Kern herum gedreht sind.Fibers supplied to a device as briefly described above; On the one hand held in the fiber structure and from the output opening of the Fiber feed channels substantially without rotation distribution in the Garnabzugkanal out. On the other hand, the fibers are in the range between Fiber feed channel and Garnabzugkanal the centrifugal effect of Vortex flow through which they pass from the inlet opening of the Garnabzugkanals be driven away radially. The with the described method produced yarns show because even a core of essentially in Garnvorängsrichtung extending fibers or fiber regions without significant Rotation and an outer area in which the fibers or fiber areas around the Core are turned around.

Dieser Garnaufbau kommt nach einer modellhaften Erklärung dadurch zustande, dass vorlaufende Enden von Fasern, insbesondere von Fasern, deren nachlaufende Bereiche noch stromaufwärts vom Faserzuführungskanal gehalten werden, im wesentlichen direkt in den Garnabzugkanal gelangen, dass aber nachlaufende Faserbereiche, insbesondere, wenn sie im Eingangsbereich des Faserzuführungskanals nicht mehr gehalten werden, durch die Wirbelwirkung aus dem Faserverband gezogen und dann um das entstehende Garn gedreht werden. Es kann auch vorkommen, dass vorlaufende Enden von Fasern durch die Wirbelwirkung aus dem Faserverband abgespreizt werden, während das nachlaufende Ende im zentralen Bereich des Faserverbandes verbleibt, was zu den in entsprechenden Garnen beobachteten Schlaufen führt.This yarn construction comes about after a model explanation by the fact that leading ends of fibers, in particular fibers whose trailing Areas are still held upstream of the fiber feed channel, in the essentially pass directly into the Garnabzugkanal, but that trailing Fiber areas, especially if they are in the entrance area of the Fiber supply channels are no longer held by the vortex effect of the Pulled fiber strand and then rotated around the resulting yarn. It can also occur that leading ends of fibers due to the vortex effect the fiber structure are spread while the trailing end in the central Area of fiber structure remains, resulting in the corresponding yarns observed loops leads.

Jedenfalls sind Fasern zu einem gleichen Zeitpunkt sowohl im entstehenden Garn eingebunden, wodurch sie in den Garnabzugkanal gezogen werden, als auch der Wirbelströmung ausgesetzt, die sie zentrifugal, also von der Eingangsöffnung des Garnabzugkanals weg beschleunigt und in den Ablasskanal zieht. Die durch die Wirbelströmung aus dem Faserverband gezogenen Faserbereiche bilden einen in die Eingangsöffnung des Garnabzugkanals mündenden Faserwirbel, dessen längere Anteile sich spiralartig aussen um den spindelförmigen Eingangsbereich des Garnabzugkanals winden und in dieser Spirale entgegen der Kraft der Strömung im Ablasskanal gegen die Eingangsöffnung des Garnabzugkanals gezogen werden. Fasern, von denen weder das vorlaufendes noch das nachlaufendes Ende in das entstehende Garn eingezogen wird, werden mit einer Wahrscheinlichkeit, die mit kleinerer Faserlänge grösser wird, durch den Ablasskanal weggeführt und stellen dadurch unerwünschten Faserabgang dar.In any case, fibers are at the same time both in the resulting yarn integrated, whereby they are pulled into the Garnabzugkanal, as well as the Vortex flow exposed to them centrifugally, ie from the inlet opening of the Thread take-off channel accelerates away and pulls into the drainage channel. The by the Vortex flow from the fiber structure drawn fiber areas form one in the Entrance opening of Garnabzugkanals opening fiber vortex whose longer Sharp spirally outward around the spindle - shaped entrance area of the Garnabzugkanals wind and in this spiral against the force of flow in the Discharge channel to be pulled against the entrance opening of the Garnabzugkanals. Fibers, of which neither the leading nor the trailing end in the resulting yarn is fed with a probability that with smaller fiber length is larger, led away and put through the discharge channel This is undesirable fiber exit.

Das beschriebene, bekannte Spinnverfahren zeichnet sich dadurch aus, dass es sehr hohe Spinngeschwindigkeiten erlaubt (bis zehn Mal höhere Spinngeschwindigkeiten als für Ringspinnverfahren). Andererseits erweist es sich als schwierig, mit dem Verfahren einen hohen Faserabgang zu vermeiden und einen für eine hohe Garnqualität genügend hohen Faseranteil im gedrehten Aussenbereich des Garnes zu erhalten.The described, known spinning process is characterized in that it is very high spinning speeds allowed (up to ten times higher spinning speeds than for ring spinning process). On the other hand, it turns out to be difficult with the method to avoid a high fiber output and one for a high yarn quality To obtain enough high fiber content in the twisted outer area of the yarn.

Es ist nun die Aufgabe der Erfindung, vorrichtungsmässige Änderungen vorzuschlagen mit denen das oben beschriebene Spinnverfahren verbessert werden kann. Die Erfindung stellt sich also die Aufgabe, eine Vorrichtung zum Spinnen mittels Wirbelströmung zu schaffen, mit welcher Vorrichtung es möglich werden soll, den Faserabgang gegenüber dem Stande der Technik zu reduzieren, wobei die Garnqualität mindestens gleich hoch sein soll.It is now the object of the invention to propose device-moderate changes with which the spinning process described above can be improved. The Invention is therefore the task of a device for spinning means To create vortex flow, with which device it should be possible, the To reduce fiber disposal over the prior art, the yarn quality should be at least the same.

Diese Aufgabe wird gelöst durch die Vorrichtung, wie sie in den Patentansprüchen definiert ist. This object is achieved by the device as defined in the claims is defined.

Die Erfindung basiert auf der Idee, die Wirbelkammer und den Ablasskanal funktionell zu trennen, derart, dass der Faserwirbel sich nicht nach Belieben stromabwärts in den Ablasskanal fortsetzen kann, sondern auf die Wirbelkammer, das heisst auf einen vom Ablasskanal funktionell abgetrennten Raum beschränkt bleibt. Diese Idee wird realisiert, dadurch, dass die Wirbelkammer stromabwärts durch eine Wand begrenzt wird und dass das Fluid vollständig durch diese Wand hindurch in den Ablasskanal abgeführt wird. Im Zentrum dieser die Wirbelkammer stromabwärts begrenzenden Wand ist die Eingangsöffnung des Garnabzugkanals angeordnet. Die die Wirbelkammer stromabwärts begrenzende Wand hat keine drehungserteilende Funktion, das heisst sie rotiert nicht. Für die Wegführung des Fluids sind in dieser Wand um die Eingangsöffnung des Garnabzugkanals verteilte, in den Ablasskanal oder in Ablasskanäle mündende Öffnungen vorgesehen, die auch zu einer ringförmigen Öffnung zusammengefasst sein können.The invention is based on the idea of the vortex chamber and the discharge channel functional in such a way that the fiber vortex does not move downstream into the Drain channel can continue, but on the vortex chamber, that is to one of the Drain channel functionally separated space remains limited. This idea is realized in that the vortex chamber is bounded downstream by a wall and that the fluid is completely discharged through this wall into the discharge channel becomes. In the center of the vortex chamber downstream bounding wall is the Input opening of Garnabzugkanals arranged. The the vortex chamber The downstream wall has no rotation-dividing function, that is to say does not rotate. For the routing of the fluid are in this wall around the Inlet opening of Garnabzugkanals distributed, in the discharge channel or in Discharge channels opening openings provided, which is also an annular Opening can be summarized.

Durch die oben kurz beschriebene, funktionelle Trennung von Wirbelkammer und Ablasskanal wird die Wahrscheinlichkeit eines Faserabganges durch den Ablasskanal reduziert. Fasern im Faserwirbel, von denen kein Ende in das entstehende Garn eingebunden ist, verbleiben dadurch länger in der Wirbelkammer und die Wahrscheinlichkeit, dass sie von den wirbelnden Endbereichen von eingebundenen Fasern mitgenommen und in das entstehende Garn zurückgeführt werden, steigt. Dieser Effekt reduziert den gemäss dem Stand der Technik unerwünscht hohen Faserabgang.By the briefly described above, functional separation of vortex chamber and Discharge channel is the likelihood of fiber exit through the drainage channel reduced. Fibers in the fiber vortex, of which no end in the resulting yarn is involved, thus remain longer in the vortex chamber and the Probability that they are bound by the swirling end regions of Fibers are taken and returned to the resulting yarn increases. This effect reduces the undesirably high according to the prior art Fiber finish.

Beispielhafte Ausführungsformen der erfindungsgemässen Vorrichtung zur Herstellung eines gesponnenen Garnes aus einem losen Faserverband mit Hilfe einer Wirbelströmung werden anhand der folgenden Figuren im Detail beschrieben. Dabei zeigen:

Figur 1
den Ausgangsbereich des Faserzuführungskanals und den Eingangsbereich des Garnabzugkanals (Wirbelkammerbereich) einer bekannten Vorrichtung zur Herstellung eines gesponnenen Garnes aus einem losen Faserverband mittels Wirbelströmung (Schnitt);
Figur 2
den ebenfalls geschnitten dargestellten Wirbelkammerbereich einer beispielhaften Ausführungsform der erfindungsgemässen Vorrichtung;
Figur 3
die die Wirbelkammer gemäss Figur 2 stromabwärts begrenzende Wandplatte als Draufsicht (A-A in Figur 2);
Figur 4
eine weitere Ausführungsform der erfindungsgemässen Vorrichtung (Darstellungsweise wie Figur 2);
Figur 5
die die Wirbelkammer gemäss Figur 4 stromabwärts begrenzende Wandplatte als Draufsicht (B-B in Figur 4);
Figuren 6 und 7
den geschnittenen Wirbelkammerbereich von zwei weiteren Ausführungsformen der erfindungsgemässen Vorrichtung.
Exemplary embodiments of the device according to the invention for producing a spun yarn from a loose fiber structure by means of a turbulent flow will be described in detail with reference to the following figures. Showing:
FIG. 1
the exit area of the fiber feed channel and the entrance area of the Garnabzugkanals (swirl chamber area) of a known device for producing a spun yarn from a loose fiber structure by means of turbulence (section);
FIG. 2
the vortex chamber portion of an exemplary embodiment of the inventive device also shown cut;
FIG. 3
the wall plate limiting the vortex chamber downstream according to FIG. 2 as plan view (AA in FIG. 2);
FIG. 4
a further embodiment of the inventive device (representation as Figure 2);
FIG. 5
the wall plate limiting the vortex chamber downstream according to FIG. 4 as a plan view (BB in FIG. 4);
FIGS. 6 and 7
the cut vortex chamber area of two further embodiments of the inventive device.

Figur 1 zeigt den Wirbelkammerbereich einer Vorrichtung gemäss dem Stande der Technik, mit der einem durch einen Faserzuführungskanal 1 zugeführten, losen Faserverband 2 in einer Wirbelkammer 3 eine Drehung erteilt wird, so dass daraus ein gesponnenes Garn 4 entsteht, das durch einen Garnabzugkanal 5 abgezogen wird. Die Wirbelströmung wird in der Wirbelkammer 3 durch Einblasen eines Fluids, beispielsweise Luft, durch tangential in die Kammer mündende Düsen 6 erzeugt. Das Fluid wird durch einen Ablasskanal 7 abgeführt, wobei der Ablasskanal 7 einen um den Garnabzugkanal 5 angeordneten, ringförmigen Querschnitt aufweist und sein Eingangsbereich im wesentlichen denselben Durchmesser hat wie die Wirbelkammer 3, so dass die in der Wirbelkammer erzeugte Wirbelströmung sich in den Ablasskanal fortsetzt und aus dem Faserverband durch die zentrifugale Wirkung der Wirbelströmung herausgelöste Faserbereiche 8 sich im Ablasskanal sprialförmig aussen um den spindelförmigen Eingangsbereich des Garnabzugkanals 5 legen.
Wirbelkammer 3 und Eingangsbereich des Ablasskanals 7 stellen eine funktionsmässige Einheit dar, so dass Fasern, die nicht in das entstehende Garn eingebunden werden, mit hoher Wahrscheinlichkeit durch das Fluid in den Ablasskanal gespült werden und dadurch für das entstehende Garn verloren gehen. FIG. 1 shows the vortex chamber region of a device according to the state of the art, with which a loose fiber structure 2 fed through a fiber feed channel 1 is given a rotation in a vortex chamber 3, resulting in a spun yarn 4 which is drawn off through a yarn withdrawal channel 5 , The vortex flow is generated in the vortex chamber 3 by injecting a fluid, for example air, through nozzles 6 opening tangentially into the chamber. The fluid is discharged through a bleed passage 7, the bleed passage 7 having an annular cross section around the yarn withdrawal passage 5 and its entrance portion having substantially the same diameter as the swirl chamber 3, so that the swirl flow generated in the swirl chamber continues into the bleed passage and from the fiber structure by the centrifugal effect of the vortex flow leached out fiber regions 8 in the discharge channel sprialförmig outside the spindle-shaped entrance area of Garnabzugkanals 5 put.
Swirl chamber 3 and inlet area of the discharge channel 7 constitute a functional unit, so that fibers that are not incorporated into the resulting yarn are likely to be flushed by the fluid into the discharge channel and thereby lost for the resulting yarn.

An der Ausgangsöffnung 9 des Faserzuführungskanals 1 ist in der dargestellten Ausführungsform als Drallstoppmittel eine Kante 10 angeordnet, die exzentrisch zum Garnabzugkanal 5 angeordnet ist. Es ist auch bekannt, als Drallstoppmittel einen konzentrisch zum Garnabzugkanal angeordnete Nadel (Pin) einzusetzen, welche Nadel einen temporären Garnkern darstellt.At the outlet opening 9 of the fiber feed channel 1 is shown in the Embodiment arranged as an anti-rotation means an edge 10, the eccentric to Garnabzugkanal 5 is arranged. It is also known as a spin stop agent Insert needle (pin) arranged concentrically to the yarn withdrawal channel, which needle represents a temporary yarn core.

Figur 2 zeigt eine erste, beispielhafte Ausführungsform der erfindungsgemässen Vorrichtung. Wie in der Figur 1 ist der Wirbelkammerbereich im Schnitt dargestellt, also der Ausgangsbereich des Faserzuführungskanals 1 mit Ausgangsöffnung 9 und Drallstoppmittel 10 und der Eingangsbereich des Garnabzugkanals 5 mit Eingangsöffnung 11, sowie Wirbelkammer 3 und Ablasskanal 7, der wie in der Figur 1 beispielsweise einen im wesentlichen ringförmigen Querschnitt aufweist. FIG. 2 shows a first, exemplary embodiment of the device according to the invention. As in FIG. 1, the swirl chamber region is shown in section, that is to say the exit region of the fiber supply channel 1 with outlet opening 9 and swirl stop means 10 and the entrance region of the yarn withdrawal channel 5 with inlet opening 11, and swirl chamber 3 and outlet channel 7 which, as in FIG having a substantial annular cross-section.

Zwischen Wirbelkammer 3 und Ablasskanal 7 ist eine kreisscheibenförmige Wandplatte 20 angeordnet, die die Eingangsöffnung 11 des Garnabzugkanals 5 trägt und rund um diese Eingangsöffnung 11 verteilt eine Mehrzahl von Öffnungen 21, durch die das Fluid aus der Wirbelkammer 3 in den Ablasskanal 7 gelangt. Offensichtlich kann der Ablasskanal 7 mit ringförmigem Querschnitt auch ersetzt werden durch eine Mehrzahl von auf die Öffnungen 21 ausgerichteten Ablasskanälen.Between swirl chamber 3 and discharge channel 7 is a circular disk-shaped wall plate 20 arranged, which carries the input opening 11 of Garnabzugkanals 5 and around this inlet opening 11 distributes a plurality of openings 21 through which the fluid from the vortex chamber 3 enters the discharge channel 7. Obviously, the Discharge channel 7 with annular cross section also be replaced by a plurality of aligned on the openings 21 discharge channels.

Die über der Wandplatte 20 wirbelnden Faserbereiche 8, die im entstehenden Garn eingebunden sind, können nicht durch die Öffnungen 21 hindurch treten und werden über diese Öffnungen hinweg bewegt. Der Faserwirbel beschränkt sich also auf die Wirbelkammer 3 und die eingebundenen Fasern vermögen nicht eingebundene Fasern besser im wirbelnden Faserverband zu halten.The over the wall plate 20 swirling fiber areas 8, the resulting yarn are involved, can not pass through the openings 21 and be moved across these openings. The fiber vortex is therefore limited to the Vortex chamber 3 and the entrapped fibers are unable to integrate fibers to keep better in the swirling fiber structure.

Damit die Faserdichte in der Wirbelkammer 3 nicht zu gross wird und an den radialen Wandungen der Wirbelkammer 3 nicht allzu viel Faserreibung entsteht, ist es vorteilhaft, den Radius der Wirbelkammer 3 gegenüber dem Stande der Technik zu vergrössern auf mindestens einen Zehntel (vorteilhafterweise mehr als einen Sechstel) der effektiven Stapellänge der zu verarbeitenden Fasern (effektive Stapellänge berechnet nach der im japanischen Gebrauchsmuster 2.513.582 publizierten Formel). Thus, the fiber density in the vortex chamber 3 is not too large and at the radial Walls of the vortex chamber 3 does not arise too much fiber friction, it is advantageous To increase the radius of the vortex chamber 3 over the prior art to at least one-tenth (advantageously more than one-sixth) of the effective staple length of the fibers to be processed (effective staple length calculated after the formula published in Japanese Utility Model 2,513,582).

Um Faserreibung an der Wandplatte 20 zu reduzieren ist es vorteilhaft, diese mit einer Reibungs-reduzierenden Oberflächenstruktur zu versehen (z.B. Orangenhaut).In order to reduce fiber friction on the wall plate 20, it is advantageous to this with a Friction reducing surface structure (e.g., orange peel).

Figur 3 zeigt als Draufsicht (Blickrichtung A in Figur 2) die Wandplatte 20, die die Wirbelkammer 3 der Figur 2 stromabwärts gegen den Ablasskanal 7 abschliesst. Die Wirbelrichtung ist mit den Pfeilen F angedeutet. Die Öffnungen 21 durchdringen die Wandplatte 20 derart schief, dass das wirbelnde Fluid ohne grosse Richtungsänderung und dadurch generierte Turbulenzen in den Ablasskanal abfliessen kann. FIG. 3 shows, as a plan view (viewing direction A in FIG. 2), the wall plate 20 which closes off the vortex chamber 3 of FIG. 2 downstream against the discharge channel 7. The vortex direction is indicated by the arrows F. The openings 21 penetrate the wall plate 20 so skewed that the fluid swirling can flow into the discharge channel without great change in direction and thus generated turbulence.

Die in den Figuren 2 und 3 planparallel dargestellt Wandplatte 20 kann auch die Form eines vorzugsweise stumpfen Kegels aufweisen, wobei die Eingangsöffnung 11 das Garnabzugkanals auf dem Scheites des Kegels angeordnet ist.The wall plate 20 shown in plan-parallel in FIGS. 2 and 3 may also have the shape a preferably blunt cone, wherein the input opening 11, the Garnabzugkanals is arranged on the log of the cone.

Figuren 4 und 5 zeigen in derselben Art wie Figuren 2 und 3 eine weitere, beispielhafte Ausführungsform der erfindungsgemässen Vorrichtung. Gleiche Teile sind mit gleichen Bezugsziffern bezeichnet wie in den Figuren 2 und 3. Figures 4 and 5 show in the same way as Figures 2 and 3, a further exemplary embodiment of the inventive device. Identical parts are designated by the same reference numerals as in FIGS. 2 and 3.

Die Ausführungsform der Figuren 4 und 5 unterscheidet sich durch die Ausgestaltung der Wandplatte 20, deren Öffnungen 21 am Umfang angeordnete Schlitze sind. Der Ablasskanal 7 ist wiederum mit ringförmigem Querschnitt dargestellt, könnte aber auch eine andere, an die schlitzförmigen Öffnungen geeignet anschliessende Form haben.The embodiment of Figures 4 and 5 differs by the embodiment the wall plate 20, the openings 21 are circumferentially arranged slots. Of the Discharge channel 7 is again shown with annular cross section, but could also another, suitably connected to the slot-shaped openings subsequent shape.

Figuren 6 und 7 zeigen, in derselben Darstellungsart wie Figuren 2 und 4 zwei weitere, beispielhafte Ausführungsformen der erfindungsgemässen Vorrichtung. In diesen Vorrichtungen wird ein zentraler Teil der die Wirbelkammer stromabwärts begrenzenden Wand durch die eingangsseitige Stirnfläche 30 des Garnabzugkanals 5 gebildet. An diesen zentralen Teil schliesst ein peripherer Teil an, wobei die Öffnungen im peripheren Teil angeordnet sind (Figur 6) oder zwischen zentralem und peripherem Teil (Figur 7). Figures 6 and 7 show, in the same manner of representation as Figures 2 and 4, two further exemplary embodiments of the inventive device. In these devices, a central part of the wall defining the vortex chamber downstream is formed by the input end face 30 of the Garnabzugkanals 5. A peripheral part adjoins this central part, the openings being arranged in the peripheral part (FIG. 6) or between the central and peripheral part (FIG. 7).

Figur 6 zeigt eine Ausführungsform, in der sich die Wirbelkammer 3 nicht im wesentlichen eben und senkrecht zur Achse des Garnabzugkanals 5 erstreckt, wie dies in den Figuren 2 und 4 gezeigt ist, sondern kegelförmig ist. Figure 6 shows an embodiment in which the vortex chamber 3 does not extend substantially plane and perpendicular to the axis of the Garnabzugkanals 5, as shown in Figures 2 and 4, but is conical.

Der zentrale Teil der die Wirbelkammer 3 stromabwärts begrenzenden Wand bildet die eingansseitige Stirnfläche 30 des Garnabzugkanals 5. Einen an den zentralen Teil anschliessenden, peripheren Teil dieser Wand bildet ein perforierter Ring 31. Die Funktion des Ablasskanals 7 kann beispielsweise durch den die Vorrichtung umgebenden Luftraum übernommen werden.The central part of the vortex chamber 3 downstream bounding wall forms the Entrance-side end face 30 of Garnabzugkanals 5. One to the central part The peripheral part of this wall forms a perforated ring 31 Function of the discharge channel 7, for example, by the device surrounding airspace.

Figur 7 zeigt eine Ausführungsform, in der die die Wirbelkammer 3 stromabwärts begrenzende Wand wiederum durch die eingangsseitige Stirnfläche 30 des Garnabzugkanals 5 und einen peripheren Ring gebildet wird. Die Öffnungen 21 zum Ablasskanal 7 bilden zusammen eine einzige, ringförmigen Öffnung, die zwischen zentralem und peripherem Wandteil angeordnet ist. FIG. 7 shows an embodiment in which the wall defining the vortex chamber 3 downstream is again formed by the input end face 30 of the yarn withdrawal channel 5 and a peripheral ring. The openings 21 to the discharge channel 7 together form a single, annular opening which is arranged between the central and peripheral wall part.

Damit die im Faserwirbel wirbelnden Faserbereiche 8 nicht oder so wenig wie möglich in den Ablasskanal 7, der hier wiederum einen ringförmigen Querschnitt aufweist, gelangen können, ist die ringförmige Öffnung so schmal wie möglich und so nahe wie möglich an der Eingangsöffnung 11 des Garnrabzugkanals 5 angeordnet.So that the swirling in the fiber vortex fiber areas 8 or not as little as possible in the discharge channel 7, which again has an annular cross-section here, the annular opening is as narrow as possible and as close as possible possible arranged at the inlet opening 11 of the Garnrabzugkanals 5.

Claims (11)

  1. Device for the manufacture of a spun yarn (4) from a loose fibre structure (2) with the aid of a turbulent flow, which functions as a single means imparting a rotation, whereby the device exhibits a fibre delivery channel (1) with an outlet aperture (9) and a yarn extraction channel (5) with an inlet aperture (11) located at a distance from said outlet aperture (9), as well as means for creating the turbulent flow in a turbulent chamber (3) which is essentially arranged between said outlet aperture (9) and said inlet aperture (11), said means exhibiting nozzles (6) for blowing a fluid into the turbulence chamber (3) and for creating the turbulent flow in the turbulence chamber (3) and a drain channel (7) for conducting the fluid out of the turbulence chamber (3), characterised in that the device exhibits a wall downstream of the turbulence chamber (3), said wall separating the turbulence chamber (3) from the drain channel (7), in the centre of which the said inlet aperture (11) is arranged and exhibits a plurality of apertures (21) into the drain channel (7) for the complete removal of the fluid.
  2. Device according to Claim 1, characterised in that the wall delimiting the turbulence chamber (3) downstream is aligned perpendicular to the axis of the yarn extraction channel.
  3. Device according to Claim 1, characterised in that the wall delimiting the turbulence chamber (3) downstream has the shape of a truncated cone, at the tip of which is arranged said inlet aperture (11).
  4. Device according to one of Claims 1 to 3, characterised in that the wall delimiting the turbulence chamber (3) downstream exhibits a surface structure which reduces friction.
  5. Device according to one of Claims 1 to 4, characterised in that the wall delimiting the turbulence chamber (3) downstream is formed by a wall plate (20).
  6. Device according to Claim 5, characterised in that the wall plate (20) for guiding the fluid away exhibits a plurality of apertures (21) to conduct the fluid away, which run obliquely through the wall plate (20) in the direction of the turbulent flow.
  7. Device according to Claim 5, characterised in that the wall plate (20) for guiding the fluid away exhibits a plurality of slot-shaped apertures (21) at its circumference.
  8. Device according to Claim 7, characterised in that the slot-shaped apertures (21) run obliquely through the wall plate (20) in the direction of the turbulent flow.
  9. Device according to one of Claims 1 to 4, characterised in that a central part of the wall delimiting the turbulence chamber (3) downstream is formed by a face side (30) of the yarn extraction channel (5) on the intake side.
  10. Device according to Claim 9, characterised in that a peripheral part of the wall delimiting the turbulence chamber (3) downstream is formed by a perforated ring (31).
  11. Device according to Claim 9, characterised in that a ring-shaped aperture into the outlet channel is provided between the central part of the wall delimiting the turbulence chamber (3) downstream and a peripheral part of this wall.
EP02014499A 2001-08-17 2002-06-29 Apparatus for producing spun yarn Expired - Lifetime EP1284312B1 (en)

Applications Claiming Priority (2)

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CH15192001 2001-08-17
CH15192001 2001-08-17

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EP1284312A3 EP1284312A3 (en) 2003-07-16
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US (1) US6789382B2 (en)
EP (1) EP1284312B1 (en)
JP (1) JP2003082537A (en)
CN (1) CN100335694C (en)
AT (1) ATE304620T1 (en)
DE (1) DE50204235D1 (en)

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Publication number Priority date Publication date Assignee Title
EP1415027B1 (en) * 2001-08-08 2006-12-06 Maschinenfabrik Rieter Ag Device for producing a spun yarn
JP5698232B2 (en) * 2009-07-16 2015-04-08 マシーネンファブリク リーター アクチェンゲゼルシャフトＭａｓｃｈｉｎｅｎｆａｂｒｉｋ Ｒｉｅｔｅｒ ＡＧ Pneumatic spinning equipment
JP5526915B2 (en) * 2010-03-25 2014-06-18 村田機械株式会社 Pneumatic spinning device and spinning machine
DE102012108613A1 (en) * 2012-09-14 2014-03-20 Maschinenfabrik Rieter Ag Spinning station of a roving machine
CN103103642A (en) * 2013-02-22 2013-05-15 东华大学 Device and method for orientation electrostatic spinning nanometer fiber vortex spun yarn
TWI602961B (en) * 2015-12-14 2017-10-21 財團法人紡織產業綜合研究所 Fiber fabricating method and spinning instrument for fabricating the fiber
ITUA20163011A1 (en) * 2016-04-29 2017-10-29 Savio Macch Tessili Spa AIR-JET TYPE SPINNING DEVICE
DE102020108257A1 (en) * 2020-03-25 2021-09-30 Saurer Spinning Solutions Gmbh & Co. Kg Apparatus for separating fibers and spinning equipment comprising such a device

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Publication number Priority date Publication date Assignee Title
PL102222B1 (en) * 1976-03-10 1979-03-31 Centralny Osrodek Badawczo Rozwo METHOD AND APPARATUS FOR MANUFACTURING YARN
CH679587A5 (en) * 1989-08-25 1992-03-13 Rieter Ag Maschf
US5159806A (en) * 1989-11-14 1992-11-03 Murata Kikai Kabushiki Kaisha Apparatus for producing spun yarns
US5330338A (en) * 1992-02-17 1994-07-19 Toyo Boseki Kabushiki Kaisha Apparatus for spinning of polyurethane elastic filaments
JPH07122167B2 (en) * 1992-03-16 1995-12-25 村田機械株式会社 Yarn splicing method for spinning device
JP2697575B2 (en) * 1993-09-08 1998-01-14 村田機械株式会社 Spinning equipment
JP2708000B2 (en) * 1995-02-10 1998-02-04 村田機械株式会社 Spinning equipment
EP0990719B1 (en) * 1998-10-02 2003-05-28 W. SCHLAFHORST AG & CO. Spinning device

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EP1284312A3 (en) 2003-07-16
US20030115850A1 (en) 2003-06-26
EP1284312A2 (en) 2003-02-19
CN1407152A (en) 2003-04-02
DE50204235D1 (en) 2005-10-20
JP2003082537A (en) 2003-03-19
US6789382B2 (en) 2004-09-14
ATE304620T1 (en) 2005-09-15
CN100335694C (en) 2007-09-05

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