EP1284312A2 - Apparatus for producing spun yarn - Google Patents
Apparatus for producing spun yarn Download PDFInfo
- Publication number
- EP1284312A2 EP1284312A2 EP02014499A EP02014499A EP1284312A2 EP 1284312 A2 EP1284312 A2 EP 1284312A2 EP 02014499 A EP02014499 A EP 02014499A EP 02014499 A EP02014499 A EP 02014499A EP 1284312 A2 EP1284312 A2 EP 1284312A2
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- European Patent Office
- Prior art keywords
- channel
- vortex chamber
- downstream
- wall
- vortex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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 a loose fiber structure fed to the device, the fiber structure being passed through a vortex chamber is drawn in which the fibers of a vortex flow of a fluid exposed and thereby spun into a yarn.
- Spinning devices of the type mentioned above are known for example from the Publications US-5528895 or US-5647197 (both Murata). These devices have a fiber feed channel and a yarn take-off channel, the Output area of the fiber feed channel essentially against the Input area of the yarn take-off channel is directed and the exit opening of the Fiber feed channel at a distance from the inlet opening of the yarn take-off channel is arranged. The vortex flow is generated in the area of this distance. in the Areas of the exit opening of the fiber feed channel is also a Twist stopper (e.g. eccentric edge over which the fibers are drawn, or in the essentially concentric pin around which the fibers are guided).
- Twist stopper e.g. eccentric edge over which the fibers are drawn, or in the essentially concentric pin around which the fibers are guided.
- the entrance area of the yarn discharge channel usually has the shape of a slim one Spindle, around which a drain channel with a substantially annular Cross section runs.
- the drain channel leads from the one equipped as a swirl chamber Cavity between the fiber feed channel and yarn take-off channel and runs in essentially parallel to the yarn take-off channel.
- the swirl chamber has an im is essentially the same diameter as the inlet area of the drain channel and with nozzles directed tangentially into the chamber for blowing in a fluid (e.g. air) equipped.
- the fluid blown into the swirl chamber passes through the drain channel aspirated, the vortex flow generated in the vortex chamber around the Thread take-off channel (spindle) continues into the drain channel.
- the vortex chamber and an inlet area of the drainage duct essentially represents one is a functional unit that is used to grant rotation.
- the yarn take-off channel too optionally arranged rotating, can contribute to the rotation, whereby then using various means to ensure that the fibers against the Pressed outside of the yarn take-off channel and thus better carried become.
- the cross sections of the fiber feed channel, yarn take-off channel and drain channel are small compared to the average length of the fibers to be processed.
- the length of the Fiber feed channel is designed such that at least some of the fibers, the leading end has already reached the area of the yarn take-off channel, in the Entrance area of the fiber feed channel is still kept (e.g. between Delivery rolls of a drafting system upstream of the fiber feed channel).
- Fibers which are fed to a device as briefly described above are held on the one hand in the fiber structure and from the exit opening of the Fiber feed channel substantially without giving rotation in the Thread take-off duct led.
- the fibers are in the area between Fiber feed channel and yarn take-off channel of the centrifugal effect of the Eddy flow exposed through which it from the entrance opening of the Thread take-off channel are driven radially away.
- the one with the described procedure produced yarns show a core of essentially in Yarn longitudinal fibers or fiber areas without essential Rotation and an outer area in which the fibers or fiber areas around the Core turned around.
- this yarn structure comes about through the fact that leading ends of fibers, especially fibers, the trailing ends Areas still held upstream from the fiber feed channel essentially directly into the yarn take-off channel, but that trailing Fiber areas, especially if they are in the entrance area of the Fiber feed channel can no longer be held by the vortex effect from the The fiber dressing is pulled and then twisted around the resulting yarn. It can also occur that leading ends of fibers are characterized by the vortex effect the fiber structure can be spread while the trailing end in the central The area of the fiber structure remains, resulting in the corresponding yarns observed loops leads.
- fibers are in the emerging yarn at the same time involved, whereby they are pulled into the yarn take-off channel, as well as the Eddy flow exposed to it centrifugally, i.e. from the entrance opening of the Accelerated yarn take-off channel away and pulls into the drain channel.
- the through the Vortex flow of fiber areas drawn from the fiber structure form one into the Inlet opening of the yarn take-off channel opening fiber swirl, the longer one Shares spiral outwards around the spindle-shaped entrance area of the Thread take-off channel wind and in this spiral against the force of the current in the
- the drain channel is pulled against the inlet opening of the yarn take-off channel. Fibers, of which neither the leading nor the trailing end in the emerging yarn is drawn in with a probability that with smaller fiber length becomes larger, led away through the drainage channel and placed thereby undesirable fiber loss.
- the known spinning process described is characterized in that it is very high spinning speeds allowed (up to ten times higher spinning speeds than for ring spinning processes). On the other hand, it turns out to be difficult with the procedure to avoid a high fiber loss and one for a high yarn quality to obtain a sufficiently high proportion of fibers in the twisted outer area of the yarn.
- the invention therefore has as its object a device for spinning To create vortex flow with which device it should be possible
- the yarn quality should be at least the same height.
- the invention is based on the idea that the swirl chamber and the drainage channel are functional to separate in such a way that the fiber swirl does not freely flow downstream into the Discharge channel can continue, but on the swirl chamber, that is, on one of the Drainage duct remains functionally separate.
- This idea is realized in that the vortex chamber is delimited downstream by a wall and that the fluid is completely drained through this wall into the drain channel becomes.
- the Arranged opening of the yarn take-off channel At the center of this wall that delimits the vortex chamber downstream is the Arranged opening of the yarn take-off channel.
- the the swirl chamber downstream wall has no rotation-imparting function, that is, it does not rotate.
- Inlet opening of the yarn take-off channel distributed in the drain channel or in Drainage openings opening provided that also form an annular Opening can be summarized.
- FIG. 1 shows the swirl chamber area of a device according to the prior art, with which a loose fiber structure 2 fed through a fiber feed channel 1 is given a rotation in a swirl chamber 3, so that a spun yarn 4 is produced, which is drawn off through a yarn withdrawal channel 5 ,
- the vortex flow is generated in the vortex chamber 3 by blowing in a fluid, for example air, through nozzles 6 opening tangentially into the chamber.
- the fluid is discharged through a drain channel 7, the drain channel 7 having an annular cross section arranged around the yarn take-off channel 5 and its entrance area having essentially the same diameter as the vortex chamber 3, so that the vortex flow generated in the vortex chamber continues into the drain channel and Fiber areas 8 detached from the fiber structure by the centrifugal effect of the vortex flow lie in the discharge channel in a spiral shape around the spindle-shaped entry area of the yarn take-off channel 5.
- the vortex chamber 3 and the inlet area of the drain channel 7 represent a functional unit, so that fibers that are not incorporated into the yarn being created are highly likely to be flushed into the drain channel by the fluid and are therefore lost to the yarn produced.
- FIG. Embodiment arranged as a twist stop means an edge 10 which is eccentric to Garnabzugkanal 5 is arranged. It is also known as a swirl stopper Needle (pin) arranged concentrically to the yarn take-off channel, which needle represents a temporary yarn core.
- a swirl stopper Needle pin
- FIG. 2 shows a first exemplary embodiment of the device according to the invention.
- the swirl chamber area is shown in section, i.e. the exit area of the fiber feed channel 1 with exit opening 9 and twist stop means 10 and the entrance area of the yarn take-off channel 5 with entry opening 11, as well as swirl chamber 3 and discharge channel 7, which, as in FIG has an essentially annular cross section.
- a circular disk-shaped wall plate 20 arranged, which carries the input opening 11 of the yarn withdrawal channel 5 and around this inlet opening 11 distributes a plurality of openings 21 through which the fluid reaches the drainage channel 7 from the swirl chamber 3.
- the Drain channel 7 with an annular cross section can also be replaced by a plurality of discharge channels aligned with the openings 21.
- the fiber swirl is therefore limited to Vortex chamber 3 and the bound fibers are not able to bind fibers better to keep in the swirling fiber structure.
- FIG. 3 shows a top view (viewing direction A in FIG. 2) of the wall plate 20, which closes the vortex chamber 3 of FIG. 2 downstream against the discharge channel 7.
- the direction of the vortex is indicated by the arrows F.
- the openings 21 penetrate the wall plate 20 obliquely in such a way that the swirling fluid can flow into the discharge channel without a large change in direction and turbulence generated thereby.
- the wall plate 20 shown plane-parallel in FIGS. 2 and 3 can also have the shape of a preferably blunt cone, the input opening 11 the Garnabzugkanal is arranged on the log of the cone.
- FIGS. 4 and 5 show in the same way as Figures 2 and 3 a further exemplary embodiment of the device according to the invention. The same parts are designated with the same reference numerals as in FIGS. 2 and 3.
- FIG. 4 and 5 differs in the design the wall plate 20, the openings 21 of which are slots arranged on the circumference.
- the Drain channel 7 is again shown with an annular cross section, but could also have another shape that suitably adjoins the slot-shaped openings.
- FIGS. 6 and 7 show, in the same manner of illustration as FIGS. 2 and 4, two further exemplary embodiments of the device according to the invention.
- a central part of the wall delimiting the swirl chamber downstream is formed by the end face 30 of the yarn take-off channel 5 on the input side.
- 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).
- FIG. 6 shows an embodiment in which the swirl chamber 3 does not extend essentially flat and perpendicular to the axis of the yarn take-off channel 5, as shown in FIGS. 2 and 4, but is conical.
- the central part of the wall delimiting the vortex chamber 3 downstream forms the wall input-side end face 30 of the yarn take-off channel 5.
- One at the central part adjoining, peripheral part of this wall forms a perforated ring 31
- the drain channel 7 can function, for example, through the device surrounding airspace.
- FIG. 7 shows an embodiment in which the wall delimiting the swirl chamber 3 downstream is again formed by the front face 30 of the yarn take-off channel 5 and a peripheral ring.
- the openings 21 to the drain 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 at the inlet opening 11 of the yarn withdrawal channel 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
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 a loose fiber structure fed to the device, the fiber structure being passed through a vortex chamber is drawn 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 Garnabzugkanals 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 type mentioned above are known for example from the Publications US-5528895 or US-5647197 (both Murata). These devices have a fiber feed channel and a yarn take-off channel, the Output area of the fiber feed channel essentially against the Input area of the yarn take-off channel is directed and the exit opening of the Fiber feed channel at a distance from the inlet opening of the yarn take-off channel is arranged. The vortex flow is generated in the area of this distance. in the Areas of the exit opening of the fiber feed channel is also a Twist stopper (e.g. eccentric edge over which the fibers are drawn, or in the 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 Garnabzugkanal 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 area of the yarn discharge channel usually has the shape of a slim one Spindle, around which a drain channel with a substantially annular Cross section runs. The drain channel leads from the one equipped as a swirl chamber Cavity between the fiber feed channel and yarn take-off channel and runs in essentially parallel to the yarn take-off channel. The swirl chamber has an im is essentially the same diameter as the inlet area of the drain channel and with nozzles directed tangentially into the chamber for blowing in a fluid (e.g. air) equipped. The fluid blown into the swirl chamber passes through the drain channel aspirated, the vortex flow generated in the vortex chamber around the Thread take-off channel (spindle) continues into the drain channel. The vortex chamber and an inlet area of the drainage duct essentially represents one is a functional unit that is used to grant rotation. The yarn take-off channel, too optionally arranged rotating, can contribute to the rotation, whereby then using various means to ensure that the fibers against the Pressed outside of the yarn take-off channel and thus better carried 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, yarn take-off channel and drain channel are small compared to the average length of the fibers to be processed. The length of the Fiber feed channel is designed such that at least some of the fibers, the leading end has already reached the area of the yarn take-off channel, in the Entrance area of the fiber feed channel is still kept (e.g. between Delivery rolls of a drafting system upstream of the fiber feed channel).
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 which are fed to a device as briefly described above, are held on the one hand in the fiber structure and from the exit opening of the Fiber feed channel substantially without giving rotation in the Thread take-off duct led. On the other hand, the fibers are in the area between Fiber feed channel and yarn take-off channel of the centrifugal effect of the Eddy flow exposed through which it from the entrance opening of the Thread take-off channel are driven radially away. The one with the described procedure produced yarns show a core of essentially in Yarn longitudinal fibers or fiber areas without essential Rotation and an outer area in which the fibers or fiber areas around the Core 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.According to a model explanation, this yarn structure comes about through the fact that leading ends of fibers, especially fibers, the trailing ends Areas still held upstream from the fiber feed channel essentially directly into the yarn take-off channel, but that trailing Fiber areas, especially if they are in the entrance area of the Fiber feed channel can no longer be held by the vortex effect from the The fiber dressing is pulled and then twisted around the resulting yarn. It can also occur that leading ends of fibers are characterized by the vortex effect the fiber structure can be spread while the trailing end in the central The area of the 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 in the emerging yarn at the same time involved, whereby they are pulled into the yarn take-off channel, as well as the Eddy flow exposed to it centrifugally, i.e. from the entrance opening of the Accelerated yarn take-off channel away and pulls into the drain channel. The through the Vortex flow of fiber areas drawn from the fiber structure form one into the Inlet opening of the yarn take-off channel opening fiber swirl, the longer one Shares spiral outwards around the spindle-shaped entrance area of the Thread take-off channel wind and in this spiral against the force of the current in the The drain channel is pulled against the inlet opening of the yarn take-off channel. Fibers, of which neither the leading nor the trailing end in the emerging yarn is drawn in with a probability that with smaller fiber length becomes larger, led away through the drainage channel and placed thereby undesirable fiber loss.
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 known spinning process described is characterized in that it is very high spinning speeds allowed (up to ten times higher spinning speeds than for ring spinning processes). On the other hand, it turns out to be difficult with the procedure to avoid a high fiber loss and one for a high yarn quality to obtain a sufficiently high proportion of fibers 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-related changes with which the spinning process described above can be improved. The The invention therefore has as its object a device for spinning To create vortex flow with which device it should be possible To reduce fiber loss compared to the prior art, the yarn quality should be at least the same height.
Diese Aufgabe wird gelöst durch die Vorrichtung, wie sie in den Patentansprüchen definiert ist. This object is achieved by the device as described 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 that the swirl chamber and the drainage channel are functional to separate in such a way that the fiber swirl does not freely flow downstream into the Discharge channel can continue, but on the swirl chamber, that is, on one of the Drainage duct remains functionally separate. This idea is realized in that the vortex chamber is delimited downstream by a wall and that the fluid is completely drained through this wall into the drain channel becomes. At the center of this wall that delimits the vortex chamber downstream is the Arranged opening of the yarn take-off channel. The the swirl chamber downstream wall has no rotation-imparting function, that is, it does not rotate. For the routing of the fluid in this wall are around Inlet opening of the yarn take-off channel, distributed in the drain channel or in Drainage openings opening provided that also form 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.Due to the functional separation of vortex chamber and Drain channel becomes the probability of fiber exiting through the drain channel reduced. Fibers in the fiber swirl, none of which end in the resulting yarn is involved, stay longer in the swirl chamber and the Probability of being involved by the swirling end areas of Fibers taken away and returned to the resulting yarn increases. This effect reduces the undesirably high level 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:
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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);
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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);
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Figuren 6 und 7 - den geschnittenen Wirbelkammerbereich von zwei weiteren Ausführungsformen der erfindungsgemässen Vorrichtung.
- Figure 1
- the exit area of the fiber feed channel and the entrance area of the yarn withdrawal channel (swirl chamber area) of a known device for producing a spun yarn from a loose fiber structure by means of a vortex flow (section);
- Figure 2
- the swirl chamber region, likewise shown in section, of an exemplary embodiment of the device according to the invention;
- Figure 3
- the wall plate delimiting the vortex chamber according to FIG. 2 as a top view (AA in FIG. 2);
- Figure 4
- a further embodiment of the device according to the invention (representation as in FIG. 2);
- Figure 5
- the wall plate delimiting the vortex chamber according to FIG. 4 as a top view (BB in FIG. 4);
- Figures 6 and 7
- the cut swirl chamber region of two further embodiments of the device according to the invention.
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 swirl chamber area of a device according to the prior art, with which a
The
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
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. Figure 2 shows a first exemplary embodiment of the device according to the invention. As in FIG. 1, the swirl chamber area is shown in section, i.e. the exit area of the
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 the
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
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). So that the fiber density in the
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
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 a top view (viewing direction A in FIG. 2) of the
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
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 device according to the invention. The same parts are designated with 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 in the design
the
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). FIGS. 6 and 7 show, in the same manner of illustration as FIGS. 2 and 4, two further exemplary embodiments of the device according to the invention. In these devices, a central part of the wall delimiting the swirl chamber downstream is formed by the
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. FIG. 6 shows an embodiment in which the
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 wall delimiting the
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 delimiting the
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
Claims (11)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH15192001 | 2001-08-17 | ||
| CH15192001 | 2001-08-17 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1284312A2 true EP1284312A2 (en) | 2003-02-19 |
| EP1284312A3 EP1284312A3 (en) | 2003-07-16 |
| EP1284312B1 EP1284312B1 (en) | 2005-09-14 |
Family
ID=4565535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02014499A Expired - Lifetime EP1284312B1 (en) | 2001-08-17 | 2002-06-29 | Apparatus for producing spun yarn |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6789382B2 (en) |
| EP (1) | EP1284312B1 (en) |
| JP (1) | JP2003082537A (en) |
| CN (1) | CN100335694C (en) |
| AT (1) | ATE304620T1 (en) |
| DE (1) | DE50204235D1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2369043A3 (en) * | 2010-03-25 | 2015-03-25 | Murata Machinery, Ltd. | Pneumatic spinning device and spinning machine |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004537659A (en) * | 2001-08-08 | 2004-12-16 | 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 | Equipment for producing spun yarn |
| CN102471950B (en) * | 2009-07-16 | 2015-02-11 | 里特机械公司 | Air-jet spinning apparatus |
| 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 |
| EP4012083A1 (en) * | 2020-12-09 | 2022-06-15 | Saurer Intelligent Technology AG | Spinning element of an air spinning nozzle for an air spinning machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4073129A (en) * | 1976-03-10 | 1978-02-14 | Centralny Osrodek Badawczo-Rozwojowy Maszyn Wlokienniczych | Method and apparatus for manufacture of yarn |
| US5159806A (en) * | 1989-11-14 | 1992-11-03 | Murata Kikai Kabushiki Kaisha | Apparatus for producing spun yarns |
| US5528895A (en) * | 1993-09-08 | 1996-06-25 | Murata Kikai Kabushiki Kaisha | Spinning apparatus with twisting guide surface |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH679587A5 (en) * | 1989-08-25 | 1992-03-13 | Rieter Ag Maschf | |
| 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 |
| 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 |
-
2002
- 2002-06-29 DE DE50204235T patent/DE50204235D1/en not_active Expired - Fee Related
- 2002-06-29 AT AT02014499T patent/ATE304620T1/en not_active IP Right Cessation
- 2002-06-29 EP EP02014499A patent/EP1284312B1/en not_active Expired - Lifetime
- 2002-07-24 US US10/201,611 patent/US6789382B2/en not_active Expired - Fee Related
- 2002-08-16 CN CNB02130338XA patent/CN100335694C/en not_active Expired - Fee Related
- 2002-08-19 JP JP2002238582A patent/JP2003082537A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4073129A (en) * | 1976-03-10 | 1978-02-14 | Centralny Osrodek Badawczo-Rozwojowy Maszyn Wlokienniczych | Method and apparatus for manufacture of yarn |
| US5159806A (en) * | 1989-11-14 | 1992-11-03 | Murata Kikai Kabushiki Kaisha | Apparatus for producing spun yarns |
| US5528895A (en) * | 1993-09-08 | 1996-06-25 | Murata Kikai Kabushiki Kaisha | Spinning apparatus with twisting guide surface |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2369043A3 (en) * | 2010-03-25 | 2015-03-25 | Murata Machinery, Ltd. | Pneumatic spinning device and spinning machine |
| CN104532418A (en) * | 2010-03-25 | 2015-04-22 | 村田机械株式会社 | Pneumatic spinning device and spinning machine |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE304620T1 (en) | 2005-09-15 |
| CN1407152A (en) | 2003-04-02 |
| US6789382B2 (en) | 2004-09-14 |
| CN100335694C (en) | 2007-09-05 |
| EP1284312B1 (en) | 2005-09-14 |
| EP1284312A3 (en) | 2003-07-16 |
| JP2003082537A (en) | 2003-03-19 |
| DE50204235D1 (en) | 2005-10-20 |
| US20030115850A1 (en) | 2003-06-26 |
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