EP2895646B1 - Spinning station of an air jet spinning machine - Google Patents
Spinning station of an air jet spinning machine Download PDFInfo
- Publication number
- EP2895646B1 EP2895646B1 EP13783660.7A EP13783660A EP2895646B1 EP 2895646 B1 EP2895646 B1 EP 2895646B1 EP 13783660 A EP13783660 A EP 13783660A EP 2895646 B1 EP2895646 B1 EP 2895646B1
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- EP
- European Patent Office
- Prior art keywords
- guiding
- channel
- draw
- vortex chamber
- spinning position
- 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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- 238000009987 spinning Methods 0.000 title claims description 55
- 238000010042 air jet spinning Methods 0.000 title description 2
- 239000000835 fiber Substances 0.000 claims description 121
- 230000000694 effects Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000002131 composite material Substances 0.000 description 32
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007378 ring spinning Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/11—Spinning by false-twisting
- D01H1/115—Spinning by false-twisting using pneumatic means
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
- D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
Definitions
- the present invention relates to a spinning station of an air spinning machine, which serves to produce a yarn from a fibrous fiber structure consisting of fiber, wherein the spinning station a vortex chamber with an inlet opening for the operating during the air spinning machine in a transport direction in the vortex chamber incoming fiber structure and at least partially in comprising the vortex chamber extending Garnticianselement, wherein the spinning station has directed into the vortex chamber air nozzles which open in the region of a vortex chamber surrounding the wall in the vortex chamber and the air in a predetermined direction of rotation in the vortex chamber can be introduced to the fiber structure in the region of an inlet mouth of Yarning element to impart a rotation in said direction of rotation, wherein the Garn Strukturselement has a discharge channel through which the yarn from the vortex chamber is removable, wherein in the region of the inlet opening of the vortex chamber a Guidance arrangement for guiding the fiber composite is arranged, and wherein the guide arrangement comprises at least two guide sections spaced apart from each other, whose mutual
- Air spinning machines with appropriately equipped spinning stations are known in the art (see for example EP 0 990 719 B1 . DE 40 36 119 C2 ) and serve to produce a yarn from an elongated fiber structure.
- the outer fibers of the fiber composite are wound around the inner core fibers by means of a vortex air flow generated by the air nozzles within the vortex chamber in the area of the aforementioned inlet mouth of the yarn formation element and finally form the binder fibers which determine the desired strength of the yarn.
- This creates a yarn with a true rotation, which finally dissipated via the discharge channel from the vortex chamber and z. B. can be wound on a spool.
- the term yarn is generally understood to mean a fiber structure in which at least some of the fibers are wound around an inner core are.
- a yarn is included in the traditional sense, which can be processed into a fabric, for example with the aid of a weaving machine.
- the invention relates to air spinning machines, with the help of so-called roving (other name: Lunte) can be produced.
- roving other name: Lunte
- This type of yarn is characterized by the fact that, despite a certain strength, which is sufficient to transport the yarn to a subsequent textile machine, it is still delayable.
- the roving can thus with the help of a defaulting device, z.
- a roving processing textile machine such as a ring spinning machine, are warped before it is finally spun.
- the rotation generated in the region of the yarn formation element does not extend beyond the inlet opening in the direction of transport of the yarn or of the fiber structure. In other words, it should therefore be ensured that the fibers of the fiber composite retain their original orientation prior to contact with the vortex air flow and only receive the corresponding rotation within the vortex chamber. If the rotation were to propagate counter to the transport direction, the associated reverse rotation of the fiber composite would inevitably lead to a reduction in the desired binder fibers or to a reduced resilience of the fiber composite in the region of a distortion device arranged upstream of the vortex chamber.
- the object of the present invention is therefore to propose a spinning station of an air-spinning machine which effectively counteracts the return of the rotation of the fiber composite generated in the area of the swirling chamber against the transport direction thereof, without causing an excessive reduction in the number of binding fibers.
- DE19926492 relates to a device for producing spun threads by means of an air flow.
- the air flow acts in the area between a sliver guide and the spindle on the fibers of an untwisted, stretched by a drafting and supplied sliver to rotate it.
- the sliver is then passed through the spindle.
- the sliver guide is arranged outside an imaginary center line of the running sliver so that the fibers are guided along the inwardly facing surface of the sliver guide.
- the sliver guide consists of spaced-apart fiber guide elements that allow the free passage of a core fiber bundle.
- DE4036119 discloses a method and an apparatus for producing yarns which correspond to a yarn with true rotation, wherein a sliver guide is provided within a nozzle block, which acts on the sliver of a drafting sliver with a rotating air flow, the tip of which is directed to an insertion opening of a rotating spindle is.
- JPH607360 shows a spinning device which consists of a rotating or fixed hollow spindle with a conical head part and a guide element.
- the vortex chamber is formed with groove-like walls.
- WO2005026421 relates to a roving machine, the use of a twisting device and a method for producing a roving.
- the roving is made according to the invention of a fiber structure, which undergoes a true twist distribution by means of one or more air currents.
- JPH0489567U discloses an air-jet nozzle.
- the spinning station is characterized in that, in addition to the guide sections acting on the fiber structure from outside, the guide arrangement comprises at least one middle guide element which extends at least partially between the guide sections in a section running perpendicular to the longitudinal axis of the trigger channel.
- the middle guide element is thus located in an area which has to be passed by the fiber bundle entering through the inlet opening of the vortex chamber. This leads to a direct contact between the fiber structure and the middle guide element, which finally a lateral, d. H. directed perpendicular to a longitudinal axis of the discharge channel, deflecting the fibers of the fiber composite causes.
- the middle guide member ensures that a portion of the fibers of the fiber composite are forced outwards and thus particularly effectively detected by the air vortex flow generated by the air nozzles and the middle, untwisted Fiber band core can be looped.
- the guide assembly thus consists of a central guide element, which is located in the transport path of the fiber composite, and a plurality of guide sections, which in turn should also be placed in the region of the inlet opening of the vortex chamber and contact the passing fiber structure mainly from the outside.
- the central guide element extends at least in sections on the longitudinal axis of the discharge channel or a central axis of the inlet opening of the vortex chamber. Since the fiber structure is usually guided such that its imaginary central axis extends on the longitudinal axis of the discharge channel or a central axis of the inlet opening, it is ensured in this way that the central guide element at least partially within the passing fiber structure located. This, in turn, ensures that at least a portion of the fibers of the fiber composite are forced outward and can be detected by the air flow within the vortex chamber. In contrast, it should be ensured that the guide portions extend outside of said axes in order to allow a guidance of the fiber composite from the outside and thus to prevent the re-planting of the rotation.
- the inlet opening or the wall surrounding the inlet opening can extend at least partially concentrically with the inlet mouth of the outlet channel.
- the fiber composite undergoes no deflection in this case as a whole. Rather, at least the end of the central guide element facing the withdrawal channel lies on a line which corresponds to the imaginary longitudinal axis of the incoming fiber composite.
- the fiber structure is basically rectilinearly guided into the region of the withdrawal channel (even if the described deflection of the fibers takes place in the region of the middle guide element, in which case the fibers are due to the presence of the middle guide element and starting from this preferably uniformly distributed around the circumference of the fiber composite are pushed outwards).
- the guide sections are formed by guide pins or guide plates which, starting from a wall surrounding the inlet opening of the vortex chamber, extend in the direction of the inlet mouth of the yarn formation element. While it has been proven in the case of thorns to provide them with a pointed end, the plates may be rounded off to one or more sides in order to avoid damage to the passing fibers.
- the plates also preferably extend radially inwardly and may, like the guide pins, connected to a wall of the spinning station or be formed integrally therewith. In any case, it has been proven to place the guide sections at equal distances from each other.
- an end of the middle guide element sent to an outlet opening of the withdrawal channel is placed between the inlet mouth of the yarn formation element and the inlet opening of the vortex chamber.
- the said end is located in this case in the area in which the fiber structure passes into the area of the vortex air flow. This ensures that the fibers of the fiber composite are pressed outwards by the guide element running in its interior and are thus increasingly wound around the remaining fibers as wraparound fibers.
- the guide sections can either extend as far as into the mentioned area of the spinning station. However, it is also conceivable that these are placed completely in the inlet opening of the vortex chamber and thus do not reach directly into the flow area of the vortex air flow.
- the middle guide element extends further in the direction of an outlet opening of the draw-off channel than the guide sections. This ensures that the air flow, which surrounds the fiber structure in the region of the end of the central guide element pointing in the direction of the outlet opening, does not hit the outer guide sections of the guide arrangement according to the invention.
- the distance between the middle guide element and the adjacent guide sections may be between one and a few millimeters.
- the guide sections and / or the middle guide element extends into the trigger channel.
- Such an arrangement ensures that the desired effect of the respective component is maintained until the fibers are within the exhaust duct and the swirling air flow is no longer or only slightly exposed.
- the protruding into the flue duct elements should have in this area a cross-sectional area which is less than half (preferably one third) of the cross-sectional area of the inlet mouth of the flue to avoid clogging of the flue.
- the minimum distance between two guide sections is greater than the minimum distance between each guide section and one of an outlet opening of the discharge channel facing the end of the central guide element.
- the end sections of the guide sections facing the outlet opening of the withdrawal channel are placed relatively close to the corresponding end section of the central guide element.
- the fiber structure is inflated at this point by the central guide element from the inside (the individual fibers are in the radial direction - relative to the longitudinal axis of the discharge channel - pushed outward), so that at least the outer fiber ends of the fiber composite come into contact with the guide sections. A reverse rotation of the fiber composite is thereby particularly effectively avoided.
- the guide sections each have an end facing away from an outlet opening of the discharge channel and an end facing away from the outlet opening, wherein one of the outlet opening of the discharge channel end facing the middle guide element in a direction parallel to the longitudinal axis of the discharge channel section between the respective ends the guide sections is placed.
- the fiber composite must pass through an area in which it is in contact simultaneously with the guide portions acting on it from the outside and the middle guide member extending substantially inside. A re-planting of the yarn twist can be particularly effectively prevented in this way with sufficient number of Umwindemaschinen.
- both the middle guide element and the guide sections each have an end facing the outlet opening of the draw-off channel, said ends of the guide sections being placed concentrically around said end of the middle guide element in a section perpendicular to the longitudinal axis of the draw-off channel.
- the central guide element should be placed centrally in said section, it is advantageous to place the guide sections on a circular path around the centrally arranged central guide element.
- the middle guide element (or its central axis in the region of the outlet opening of the discharge channel facing end portion) forms in this case, so to speak, the center of a circle to which the corresponding End portions of the guide portions are arranged.
- the minimum distance between two guide sections is smaller than the diameter of the discharge channel in the region of the inlet mouth of the yarn formation element.
- a rotation of the fiber composite in the region of the guide arrangement is hereby particularly effectively avoided, in particular if the distance between the guide sections is smaller than the diameter of the yarn produced.
- At least one guide section with the longitudinal axis of the discharge channel forms an angle ⁇ , the amount of a value between 10 ° and 50 °, preferably a value between 20 ° and 40 °, particularly preferably a value between 25 ° and 35 °, occupies.
- the guide sections or the mandrels forming the guide sections should therefore form an acute angle with the longitudinal axis of the withdrawal channel in the transport direction of the fiber composite, in order to allow the guide sections to slide along the fiber structure without mutual entanglement.
- the guide sections should be made flexible in order to be able to preclude cutting of the fiber structure in the longitudinal direction.
- the guide sections and / or the middle guide element are part of an insert which is mounted stationary or movable with respect to the vortex chamber.
- Guide sections and middle guide element are in this case interchangeable with the insert, so that the spinning position quickly adapted to different types of fiber composite and / or dimensions can be.
- the insert is preferably sleeve-shaped.
- the guide sections and / or the middle guide element can also be part of the insert or connected to it.
- the FIG. 1 shows a schematic view of a section of an air-spinning machine.
- the air-spinning machine can comprise a drafting system 25, which is supplied with a fiber structure 2, for example in the form of a relined conveyor belt.
- the air spinning machine shown comprises a plurality of mutually adjacent spinning stations 22, each with an internal swirl chamber 3, in which the fiber structure 2 or at least a portion of the fibers of the fiber composite 2 is provided with a rotation (the exact operation of the spinning station 22 is hereinafter described in more detail).
- the air-spinning machine, a pair of delivery rollers 26 and a the Take-off roller pair 26 downstream winding device 27 (also shown schematically) with a coil 28 for winding up the spinning unit 22 leaving and the desired rotation having yarn 1 include.
- the device according to the invention need not necessarily have a drafting device 25, as shown in FIG FIG. 1 is shown. Also, the take-off roller pair 26 is not mandatory.
- the spinning machine shown operates on an air spinning process.
- the fiber structure 2 is guided via a fiber guide element 24 provided with an inlet opening into the swirl chamber 3 of the spinning station 22 (see also FIG. 2 ).
- a rotation ie at least part of the free fiber ends 23 of the fiber composite 2 is detected by an air flow, which is generated by correspondingly arranged in a surrounding the vortex chamber 3 wall 21 air nozzles 6.
- a portion of the fibers is thereby pulled out of the fiber structure 2 at least a little bit and wound around the tip of a protruding into the vortex chamber 3 Garn Strukturselements 5.
- the yarn 1 produced can basically be any fiber composite which is characterized in that an outer part of the fibers (so-called binding fibers) is wrapped around an inner, preferably untwisted part of the fibers to give the yarn 1 the desired strength.
- an air-spinning machine with the aid of which so-called roving can be produced.
- Roving is a yarn 1 with a relatively small proportion of wraparound fibers, or a yarn 1, in which the wraparound fibers are wound relatively loosely around the inner core, so that the yarn 1 remains deformable. This is crucial if the produced yarn 1 on a subsequent textile machine (For example, a ring spinning machine) is to be distorted again with the help of a drafting system 25 or must, in order to be further processed accordingly.
- the air nozzles 6 it should also be mentioned as a precautionary measure at this point that they should as a rule be aligned so that the exiting air jets are rectified in order to jointly produce a rectified air flow with a direction of rotation.
- the individual air nozzles 6 are arranged in this case rotationally symmetrical to one another.
- the spinning stations 22 known in the prior art preferably also have a swirl-blocking element 29, for example inserted into the fiber-guiding element 24.
- This can, as in FIG. 2 shown as formed by the fibers partially entwined pin and prevents rotation in the fiber structure 2 against the transport direction of the fiber composite 2 and thus propagates in the direction of the inlet opening 4 of the fiber guide element 24.
- the spinning unit 22 according to the invention now has a novel guide assembly 9, which causes a reverse planting of the rotation opposite to the transport direction of the fiber composite 2, without excessively reducing the number of desired Umwindemaschinen.
- the guide assembly 9 now has at least two spaced-apart guide portions 10 (in FIG. 3 there are four) whose mutual distance decreases in the transport direction of the fiber composite 2 (at least in sections).
- the spinning unit 22 has several, from the outside on the Fiber structure 2 acting elements which converge in the transport direction of the fiber composite 2.
- the fiber structure 2 therefore inevitably comes into contact with the guide sections 10 and is, so to speak, gripped from the outside, so that a rotation thereof in the region of the guide sections 10 is prevented.
- the guide assembly 9 further comprises at least one central guide member 11 which is in a perpendicular to the longitudinal axis 12 of the discharge channel 8 extending section (see FIG. 3 , lower illustration) extends at least partially between the guide sections 10. While now the outer guide portions 10 cause a guiding of the fiber composite 2 "from the outside", the middle guide member 11 is during the yarn production, so to speak, "inside” the fiber composite 2 and thus causes it to be pushed apart.
- the middle guide member 11 takes place by the middle guide member 11, a deflection of the fibers to the outside, or geometrically expressed, perpendicular to a longitudinal axis 12 of the discharge channel 8.
- the free fiber ends 23 are increasingly pressed outward, so that it is ensured that the fibers despite the outer guide portions 10 reach into the region of the air flow generated by the air nozzles 6 and can be wound around the fiber core.
- FIG. 3 mainly serves to explain the principle of the invention, show the FIGS. 4 to 9 different examples of the orientation, design and mutual arrangement of the guide portions 10 and the middle guide member 11th
- the central guide element 11 does not necessarily have to be present as a pointed guide pin 15, as for example FIG. 3 can be seen. Rather, other designs are conceivable.
- the central guide element 11 could have a drop or spherical end, as shown in FIG FIG. 7 is shown. This would result in a particularly strong lateral deflection of the fibers and thus an increased number of binder fibers.
- the shape and orientation of the guide portions 10 is not limited to an embodiment in principle. So it would be conceivable, for example, instead of z.
- rod-shaped guide portions 10 in FIG. 8 indicated guide plates 14, which also prevent reverse rotation of the fiber composite 2 against the transport direction.
- the end 18 of the middle guide element 11 facing the outlet opening 17 of the discharge channel 8 is in a section running parallel to the longitudinal axis 12 of the discharge channel 8 (corresponds to the illustrations according to FIGS FIGS. 4 to 9 ) between the outlet opening 17 of the discharge channel 8 facing ends 19 of the guide portions 10 and the outlet opening 17 of the discharge channel 8 facing away from the ends 20 thereof.
- the fiber structure 2 is in contact with the outer guide sections 10 and the middle guide element 11 at least in one section of the guide arrangement 9.
- the central guide element 11 (or its outlet opening 17 of the discharge channel 8 facing end 18) should run on the longitudinal axis 12 of the discharge channel 8, which may be arranged again co-linear with the central axis 13 of the inlet opening 4 ,
- the fiber structure 2 thus meets centrally on the middle guide element 11 and is deflected accordingly laterally, since it must pass through the middle guide element 11.
- the guide portions 10 and the middle guide member 11 z. B. from the inlet opening 4 surrounding wall 16 may be directed in the direction of Garn Strukturselements 5.
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- Spinning Or Twisting Of Yarns (AREA)
Description
Die vorliegende Erfindung betrifft eine Spinnstelle einer Luftspinnmaschine, die der Herstellung eines Garns aus einem aus Fasern bestehenden Faserverband dient, wobei die Spinnstelle eine Wirbelkammer mit einer Eintrittsöffnung für den im Betrieb der Luftspinnmaschine in einer Transportrichtung in die Wirbelkammer einlaufenden Faserverband und ein sich zumindest teilweise in die Wirbelkammer erstreckendes Garnbildungselement aufweist, wobei die Spinnstelle in die Wirbelkammer gerichtete Luftdüsen aufweist, die im Bereich einer die Wirbelkammer umgebenden Wandung in die Wirbelkammer münden und über die Luft in einer vorgegebenen Drehrichtung in die Wirbelkammer einbringbar ist, um dem Faserverband im Bereich einer Einlassmündung des Garnbildungselements eine Drehung in der genannten Drehrichtung zu erteilen, wobei das Garnbildungselement einen Abzugskanal aufweist, über den das Garn aus der Wirbelkammer abziehbar ist, wobei im Bereich der Eintrittsöffnung der Wirbelkammer eine Führungsanordnung zur Führung des Faserverbands angeordnet ist, und wobei die Führungsanordnung wenigstens zwei voneinander beabstandete Führungsabschnitte umfasst, deren gegenseitiger Abstand in der genannten Transportrichtung zumindest abschnittsweise abnimmt.The present invention relates to a spinning station of an air spinning machine, which serves to produce a yarn from a fibrous fiber structure consisting of fiber, wherein the spinning station a vortex chamber with an inlet opening for the operating during the air spinning machine in a transport direction in the vortex chamber incoming fiber structure and at least partially in comprising the vortex chamber extending Garnbildungselement, wherein the spinning station has directed into the vortex chamber air nozzles which open in the region of a vortex chamber surrounding the wall in the vortex chamber and the air in a predetermined direction of rotation in the vortex chamber can be introduced to the fiber structure in the region of an inlet mouth of Yarning element to impart a rotation in said direction of rotation, wherein the Garnbildungselement has a discharge channel through which the yarn from the vortex chamber is removable, wherein in the region of the inlet opening of the vortex chamber a Guidance arrangement for guiding the fiber composite is arranged, and wherein the guide arrangement comprises at least two guide sections spaced apart from each other, whose mutual distance in the transport direction decreases at least in sections.
Luftspinnmaschinen mit entsprechend ausgestatteten Spinnstellen sind im Stand der Technik bekannt (siehe beispielsweise
Generell ist im Sinne der Erfindung unter dem Begriff Garn also ein Faserverband zu verstehen, bei dem zumindest ein Teil der Fasern um einen innenliegenden Kern gegewunden sind. Umfasst ist somit ein Garn im herkömmlichen Sinne, das beispielsweise mit Hilfe einer Webmaschine zu einem Stoff verarbeitet werden kann. Ebenso betrifft die Erfindung Luftspinnmaschinen, mit deren Hilfe sogenanntes Vorgarn (andere Bezeichnung: Lunte) hergestellt werden kann. Diese Art Garn zeichnet sich dadurch aus, dass sie trotz einer gewissen Festigkeit, die ausreicht, um das Garn zu einer nachfolgenden Textilmaschine zu transportieren, noch immer verzugsfähig ist. Das Vorgarn kann also mit Hilfe einer Verzugseinrichtung, z. B. dem Streckwerk, einer das Vorgarn verarbeitenden Textilmaschine, beispielsweise einer Ringspinnmaschine, verzogen werden, bevor es endgültig versponnen wird.For the purposes of the invention, the term yarn is generally understood to mean a fiber structure in which at least some of the fibers are wound around an inner core are. Thus, a yarn is included in the traditional sense, which can be processed into a fabric, for example with the aid of a weaving machine. Likewise, the invention relates to air spinning machines, with the help of so-called roving (other name: Lunte) can be produced. This type of yarn is characterized by the fact that, despite a certain strength, which is sufficient to transport the yarn to a subsequent textile machine, it is still delayable. The roving can thus with the help of a defaulting device, z. As the drafting system, a roving processing textile machine, such as a ring spinning machine, are warped before it is finally spun.
Unabhängig von der Festigkeit des Garns ist es jedoch stets wünschenswert, dass sich die Drehung, die im Bereich des Garnbildungselements erzeugt wird, nicht über die Eintrittsöffnung entgegen der Transportrichtung des Garns bzw. des Faserverbands erstreckt. Mit anderen Worten soll also sichergestellt werden, dass die Fasern des Faserverbands vor dem Kontakt mit der Wirbelluftströmung ihre ursprüngliche Ausrichtung behalten und erst innerhalb der Wirbelkammer die entsprechende Drehung erhalten. Würde sich nämlich die Drehung entgegen der Transportrichtung fortpflanzen, so würde die damit verbundene Rückwärtsdrehung des Faserverbands zwangsläufig zu einer Verminderung der gewünschten Umwindefasern bzw. zu einer verminderten Verzugsfähigkeit des Faserverbands im Bereich einer der Wirbelkammer vorgeschalteten Verzugseinrichtung führen.Regardless of the strength of the yarn, however, it is always desirable that the rotation generated in the region of the yarn formation element does not extend beyond the inlet opening in the direction of transport of the yarn or of the fiber structure. In other words, it should therefore be ensured that the fibers of the fiber composite retain their original orientation prior to contact with the vortex air flow and only receive the corresponding rotation within the vortex chamber. If the rotation were to propagate counter to the transport direction, the associated reverse rotation of the fiber composite would inevitably lead to a reduction in the desired binder fibers or to a reduced resilience of the fiber composite in the region of a distortion device arranged upstream of the vortex chamber.
Während die im Stand der Technik bekannten und von außen auf den Faserverband einwirkenden Drallstauelemente zwar eine entsprechende Drehungsfortpflanzung einschränken, ist im Gegenzug meist eine Verringerung der Umwindefasern in Kauf zu nehmen (siehe insbesondere die oben genannte
Aufgabe der vorliegenden Erfindung ist es daher, eine Spinnstelle einer Luftspinnmaschine vorzuschlagen, die einer Rückpflanzung der im Bereich der Wirbelkammer erzeugten Drehung des Faserverbands entgegen der Transportrichtung desselben wirksam entgegenwirkt, ohne eine übermäßige Verringerung der Anzahl der Umwindefasern zu bewirken.The object of the present invention is therefore to propose a spinning station of an air-spinning machine which effectively counteracts the return of the rotation of the fiber composite generated in the area of the swirling chamber against the transport direction thereof, without causing an excessive reduction in the number of binding fibers.
JPH607360 zeigt eine Spinnvorrichtung, die aus einer rotierenden oder feststehenden Hohlspindel mit konischen Kopfteil und einem Führungselement besteht. Die Wirbelkammer wird mit rillenähnlichen Wänden gebildet.JPH607360 shows a spinning device which consists of a rotating or fixed hollow spindle with a conical head part and a guide element. The vortex chamber is formed with groove-like walls.
JPH0489567U offenbart eine Luftspinndüse.JPH0489567U discloses an air-jet nozzle.
Die Aufgabe wird gelöst durch eine Spinnstelle mit den Merkmalen des Patentanspruchs 1.The object is achieved by a spinning station with the features of patent claim 1.
Erfindungsgemäß zeichnet sich die Spinnstelle dadurch aus, dass die Führungsanordnung neben den von außen auf den Faserverband einwirkenden Führungsabschnitten zumindest ein mittleres Führungselement umfasst, das sich in einem senkrecht zur Längsachse des Abzugskanals verlaufenden Schnitt wenigstens teilweise zwischen die Führungsabschnitte erstreckt. Das mittlere Führungselement befindet sich also in einem Bereich, der von dem durch die Eintrittsöffnung der Wirbelkammer einlaufenden Faserverband passiert werden muss. Hierdurch kommt es zu einem direkten Kontakt zwischen dem Faserverband und dem mittleren Führungselement, das schließlich eine seitliche, d. h. senkrecht zu einer Längsachse des Abzugskanals gerichtete, Ablenkung der Fasern des Faserverbands bewirkt. Während nun die äußeren Führungsabschnitte eine Rückpflanzung der im Bereich des Garnbildungselements erzeugten Drehung verhindern, stellt das mittlere Führungselement sicher, dass ein Teil der Fasern des Faserverbands nach außen gedrängt werden und damit besonders wirksam vom durch die Luftdüsen erzeugten Luftwirbelstrom erfasst und um den mittleren, ungedrehten Faserverbandskern geschlungen werden können.According to the invention, the spinning station is characterized in that, in addition to the guide sections acting on the fiber structure from outside, the guide arrangement comprises at least one middle guide element which extends at least partially between the guide sections in a section running perpendicular to the longitudinal axis of the trigger channel. The middle guide element is thus located in an area which has to be passed by the fiber bundle entering through the inlet opening of the vortex chamber. This leads to a direct contact between the fiber structure and the middle guide element, which finally a lateral, d. H. directed perpendicular to a longitudinal axis of the discharge channel, deflecting the fibers of the fiber composite causes. Now, while the outer guide portions prevent a re-propagation of the rotation generated in the Garnbildungselements region, the middle guide member ensures that a portion of the fibers of the fiber composite are forced outwards and thus particularly effectively detected by the air vortex flow generated by the air nozzles and the middle, untwisted Fiber band core can be looped.
Zusammengefasst setzt sich die erfindungsgemäße Führungsanordnung also aus einem mittleren Führungselement, das sich im Transportweg des Faserverbands befindet, und mehreren Führungsabschnitten zusammen, die wiederum ebenfalls im Bereich der Eintrittsöffnung der Wirbelkammer platziert sein sollten und die den passierenden Faserverband hauptsächlich von außen kontaktieren.In summary, the guide assembly according to the invention thus consists of a central guide element, which is located in the transport path of the fiber composite, and a plurality of guide sections, which in turn should also be placed in the region of the inlet opening of the vortex chamber and contact the passing fiber structure mainly from the outside.
Hierbei ist es vorteilhaft, wenn das mittlere Führungselement zumindest abschnittsweise auf der Längsachse des Abzugskanals bzw. einer Mittelachse der Eintrittsöffnung der Wirbelkammer verläuft. Da auch der Faserverband in der Regel derart geführt wird, dass seine gedachte Mittelachse auf der Längsachse des Abzugskanals bzw. einer Mittelachse der Eintrittsöffnung verläuft, wird auf diese Weise sichergestellt, dass sich das mittlere Führungselement zumindest teilweise innerhalb des passierenden Faserverbands befindet. Dies stellt wiederum sicher, dass wenigstens ein Teil der Fasern des Faserverbands nach außen gedrückt werden und von der Luftströmung innerhalb der Wirbelkammer erfasst werden können. Im Gegensatz hierzu sollte sichergestellt sein, dass die Führungsabschnitte außerhalb der genannten Achsen verlaufen, um eine Führung des Faserverbands von außen zu ermöglichen und damit die Rückpflanzung der Drehung zu verhindern.It is advantageous if the central guide element extends at least in sections on the longitudinal axis of the discharge channel or a central axis of the inlet opening of the vortex chamber. Since the fiber structure is usually guided such that its imaginary central axis extends on the longitudinal axis of the discharge channel or a central axis of the inlet opening, it is ensured in this way that the central guide element at least partially within the passing fiber structure located. This, in turn, ensures that at least a portion of the fibers of the fiber composite are forced outward and can be detected by the air flow within the vortex chamber. In contrast, it should be ensured that the guide portions extend outside of said axes in order to allow a guidance of the fiber composite from the outside and thus to prevent the re-planting of the rotation.
Vorteile bringt es zudem mit sich, wenn die Längsachse des Abzugskanals parallel zu und insbesondere kolinear mit der Mittelachse der Eintrittsöffnung verläuft. Mit anderen Worten kann also die Eintrittsöffnung bzw. die die Eintrittsöffnung umgebende Wandung zumindest teilweise konzentrisch zur Einlassmündung des Abzugskanals verlaufen. Der Faserverband erfährt in diesem Fall keine Umlenkung als Ganzes. Vielmehr liegt zumindest das dem Abzugskanal zugewandte Ende des mittleren Führungselements auf einer Linie, die der gedachten Längsachse des einlaufenden Faserverbands entspricht. Der Faserverband wird also ausgehend von der Eintrittsöffnung der Wirbelkammer bis in den Bereich des Abzugskanals prinzipiell geradlinig geführt (auch wenn es im Bereich des mittleren Führungselements zu der beschriebenen Ablenkung der Fasern kommt, bei der die Fasern bedingt durch das Vorhandensein des mittleren Führungselements und ausgehend von diesem vorzugsweise gleichmäßig um den Umfang des Faserverbands verteilt nach außen gedrückt werden).It also brings advantages when the longitudinal axis of the discharge channel runs parallel to and in particular co-linear with the central axis of the inlet opening. In other words, therefore, the inlet opening or the wall surrounding the inlet opening can extend at least partially concentrically with the inlet mouth of the outlet channel. The fiber composite undergoes no deflection in this case as a whole. Rather, at least the end of the central guide element facing the withdrawal channel lies on a line which corresponds to the imaginary longitudinal axis of the incoming fiber composite. Thus, starting from the inlet opening of the vortex chamber, the fiber structure is basically rectilinearly guided into the region of the withdrawal channel (even if the described deflection of the fibers takes place in the region of the middle guide element, in which case the fibers are due to the presence of the middle guide element and starting from this preferably uniformly distributed around the circumference of the fiber composite are pushed outwards).
Besonders vorteilhaft ist es, wenn die Führungsabschnitte durch Führungsdorne oder Führungsplatten gebildet werden, die sich ausgehend von einer die Eintrittsöffnung der Wirbelkammer umgebenden Wandung in Richtung der Einlassmündung des Garnbildungselements erstrecken. Während es sich im Fall von Dornen bewährt hat, diese mit einem zugespitzten Ende zu versehen, können die Platten zu einer oder mehreren Seiten hin abgerundet sein, um eine Beschädigung der vorbeistreichenden Fasern zu vermeiden. Die Platten erstrecken sich zudem vorzugsweise radial nach innen und können, wie auch die Führungsdorne, mit einer Wandung der Spinnstelle verbunden oder einteilig mit dieser ausgebildet sein. In jedem Fall hat es sich bewährt, die Führungsabschnitte in gleichen Abständen zueinander zu platzieren.It is particularly advantageous if the guide sections are formed by guide pins or guide plates which, starting from a wall surrounding the inlet opening of the vortex chamber, extend in the direction of the inlet mouth of the yarn formation element. While it has been proven in the case of thorns to provide them with a pointed end, the plates may be rounded off to one or more sides in order to avoid damage to the passing fibers. The plates also preferably extend radially inwardly and may, like the guide pins, connected to a wall of the spinning station or be formed integrally therewith. In any case, it has been proven to place the guide sections at equal distances from each other.
Vorteilhaft ist es, wenn ein einer Austrittsöffnung des Abzugskanals zugesandtes Ende des mittleren Führungselements zwischen der Einlassmündung des Garnbildungselements und der Eintrittsöffnung der Wirbelkammer platziert ist. Das besagte Ende befindet sich in diesem Fall in dem Bereich, in dem der Faserverband in den Bereich der Wirbelluftströmung gelangt. Somit ist sichergestellt, dass die Fasern des Faserverbands durch das in dessen Inneren verlaufende Führungselement nach außen gedrückt werden und somit vermehrt als Umwindefasern um die restlichen Fasern geschlungen werden. Die Führungsabschnitte können sich in diesem Fall entweder ebenfalls bis in den genannten Bereich der Spinnstelle erstrecken. Denkbar ist jedoch auch, dass diese vollständig in der Eintrittsöffnung der Wirbelkammer platziert sind und somit nicht direkt in den Strömungsbereich der Wirbelluftströmung gelangen.It is advantageous if an end of the middle guide element sent to an outlet opening of the withdrawal channel is placed between the inlet mouth of the yarn formation element and the inlet opening of the vortex chamber. The said end is located in this case in the area in which the fiber structure passes into the area of the vortex air flow. This ensures that the fibers of the fiber composite are pressed outwards by the guide element running in its interior and are thus increasingly wound around the remaining fibers as wraparound fibers. In this case, the guide sections can either extend as far as into the mentioned area of the spinning station. However, it is also conceivable that these are placed completely in the inlet opening of the vortex chamber and thus do not reach directly into the flow area of the vortex air flow.
Ebenso ist es vorteilhaft, wenn sich das mittlere Führungselement weiter in Richtung einer Austrittsöffnung des Abzugskanals erstreckt als die Führungsabschnitte. Dies stellt sicher, dass die Luftströmung, die den Faserverband im Bereich des in Richtung der Austrittsöffnung weisenden Endes des mittleren Führungselements umgibt, nicht auf die äußeren Führungsabschnitte der erfindungsgemäßen Führungsanordnung trifft. Der Abstand zwischen dem mittleren Führungselement und den benachbarten Führungsabschnitten kann hierbei zwischen einem und wenigen Millimetern betragen.It is likewise advantageous if the middle guide element extends further in the direction of an outlet opening of the draw-off channel than the guide sections. This ensures that the air flow, which surrounds the fiber structure in the region of the end of the central guide element pointing in the direction of the outlet opening, does not hit the outer guide sections of the guide arrangement according to the invention. The distance between the middle guide element and the adjacent guide sections may be between one and a few millimeters.
Des Weiteren ist es vorteilhaft, wenn sich zumindest ein Teil der Führungsabschnitte und/oder das mittlere Führungselement bis in den Abzugskanal erstreckt. Eine derartig Anordnung stellt sicher, dass die gewünschte Wirkung des jeweiligen Bauteils solange aufrechterhalten bleibt, bis sich die Fasern innerhalb des Abzugskanals befinden und der Wirbelluftströmung nicht mehr oder nur noch geringfügig ausgesetzt sind. Die in den Abzugskanal ragenden Elemente sollten dabei in diesem Bereich eine Querschnittsfläche aufweisen, die geringer ist als die Hälfte (vorzugsweise ein Drittel) der Querschnittsfläche der Einlassmündung des Abzugskanals, um ein Verstopfen des Abzugskanals zu vermeiden.Furthermore, it is advantageous if at least part of the guide sections and / or the middle guide element extends into the trigger channel. Such an arrangement ensures that the desired effect of the respective component is maintained until the fibers are within the exhaust duct and the swirling air flow is no longer or only slightly exposed. The protruding into the flue duct elements should have in this area a cross-sectional area which is less than half (preferably one third) of the cross-sectional area of the inlet mouth of the flue to avoid clogging of the flue.
Auch ist es von Vorteil, wenn der minimale Abstand zwischen zwei Führungsabschnitten größer ist als der minimale Abstand zwischen jeweils einem Führungsabschnitt und einem einer Austrittsöffnung des Abzugskanals zugewandten Ende des mittleren Führungselements. Mit anderen Worten kann es von Vorteil sein, wenn die der Austrittsöffnung des Abzugskanals zugewandten Endabschnitte der Führungsabschnitte relativ nahe am entsprechenden Endabschnitt des mittleren Führungselements platziert sind. Der Faserverband wird an dieser Stelle durch das mittlere Führungselement von Innen aufgebläht (die einzelnen Fasern werden in radialer Richtung - bezogen auf die Längsachse des Abzugskanals - nach außen gedrückt), so dass zumindest die außen liegenden Faserenden des Faserverbands mit den Führungsabschnitten in Kontakt gelangen. Ein Rückdrehen des Faserverbands wird hierdurch besonders wirksam vermieden.It is also advantageous if the minimum distance between two guide sections is greater than the minimum distance between each guide section and one of an outlet opening of the discharge channel facing the end of the central guide element. In other words, it can be advantageous if the end sections of the guide sections facing the outlet opening of the withdrawal channel are placed relatively close to the corresponding end section of the central guide element. The fiber structure is inflated at this point by the central guide element from the inside (the individual fibers are in the radial direction - relative to the longitudinal axis of the discharge channel - pushed outward), so that at least the outer fiber ends of the fiber composite come into contact with the guide sections. A reverse rotation of the fiber composite is thereby particularly effectively avoided.
Ebenso bringt es Vorteile mit sich, wenn die Führungsabschnitte jeweils ein einer Austrittsöffnung des Abzugskanals zugewandtes Ende und ein der Austrittsöffnung abgewandtes Ende aufweisen, wobei ein der Austrittsöffnung des Abzugskanals zugewandtes Ende des mittleren Führungselements in einem parallel zur Längsachse des Abzugskanals verlaufenden Schnitt zwischen den jeweiligen Enden der Führungsabschnitte platziert ist. Mit anderen Worten ist es bevorzugt, dass der Faserverband einen Bereich durchlaufen muss, in dem er gleichzeitig mit den von außen auf ihn einwirkenden Führungsabschnitten und dem größtenteils im Inneren verlaufenden mittleren Führungselement in Kontakt steht. Eine Rückpflanzung der Garndrehung kann auf diese Weise bei ausreichender Anzahl an Umwindefasern besonders effektiv verhindert werden.Likewise, there are advantages when the guide sections each have an end facing away from an outlet opening of the discharge channel and an end facing away from the outlet opening, wherein one of the outlet opening of the discharge channel end facing the middle guide element in a direction parallel to the longitudinal axis of the discharge channel section between the respective ends the guide sections is placed. In other words, it is preferable that the fiber composite must pass through an area in which it is in contact simultaneously with the guide portions acting on it from the outside and the middle guide member extending substantially inside. A re-planting of the yarn twist can be particularly effectively prevented in this way with sufficient number of Umwindefasern.
Besonders vorteilhaft ist es, wenn sowohl das mittlere Führungselement als auch die Führungsabschnitte jeweils ein einer Austrittsöffnung des Abzugskanals zugewandtes Ende aufweisen, wobei die genannten Enden der Führungsabschnitte in einer senkrecht zur Längsachse des Abzugskanals verlaufenden Schnitt konzentrisch um das genannte Ende des mittleren Führungselements platziert sind. Während das mittlere Führungselement also in dem genannten Schnitt mittig platziert sein sollte, ist es von Vorteil, die Führungsabschnitte auf einer Kreisbahn um das zentral angeordnete mittlere Führungselement zu platzieren. Das mittlere Führungselement (bzw. dessen Mittelachse im Bereich des der Austrittsöffnung des Abzugskanals zugewandten Endabschnitts) bildet in diesem Fall gewissermaßen den Mittelpunkt eines Kreises, auf den die entsprechenden Endabschnitte der Führungsabschnitte angeordnet sind.It is particularly advantageous when both the middle guide element and the guide sections each have an end facing the outlet opening of the draw-off channel, said ends of the guide sections being placed concentrically around said end of the middle guide element in a section perpendicular to the longitudinal axis of the draw-off channel. Thus, while the central guide element should be placed centrally in said section, it is advantageous to place the guide sections on a circular path around the centrally arranged central guide element. The middle guide element (or its central axis in the region of the outlet opening of the discharge channel facing end portion) forms in this case, so to speak, the center of a circle to which the corresponding End portions of the guide portions are arranged.
Ebenso ist es vorteilhaft, wenn der minimale Abstand zweier Führungsabschnitte geringer ist als der Durchmesser des Abzugskanals im Bereich der Einlassmündung des Garnbildungselements. Ein Drehen des Faserverbands im Bereich der Führungsanordnung wird hierdurch besonders effektiv vermieden, insbesondere, wenn der Abstand der Führungsabschnitte kleiner ist als der Durchmesser des produzierten Garns.It is also advantageous if the minimum distance between two guide sections is smaller than the diameter of the discharge channel in the region of the inlet mouth of the yarn formation element. A rotation of the fiber composite in the region of the guide arrangement is hereby particularly effectively avoided, in particular if the distance between the guide sections is smaller than the diameter of the yarn produced.
Ebenso bringt es Vorteile mit sich, wenn zumindest ein Führungsabschnitt mit der Längsachse des Abzugskanals einen Winkel α einschließt, dessen Betrag einen Wert zwischen 10° und 50°, vorzugsweise einen Wert zwischen 20° und 40°, besonders bevorzugt einen Wert zwischen 25° und 35°, einnimmt. Die Führungsabschnitte bzw. die die Führungsabschnitte bildenden Dorne sollten also in Transportrichtung des Faserverbands gesehen mit der Längsachse des Abzugskanals einen spitzen Winkel einschließen, um ein Entlanggleiten der Führungsabschnitte am Faserverband ohne gegenseitiges Verhaken zu ermöglichen.Likewise, it brings advantages when at least one guide section with the longitudinal axis of the discharge channel forms an angle α, the amount of a value between 10 ° and 50 °, preferably a value between 20 ° and 40 °, particularly preferably a value between 25 ° and 35 °, occupies. The guide sections or the mandrels forming the guide sections should therefore form an acute angle with the longitudinal axis of the withdrawal channel in the transport direction of the fiber composite, in order to allow the guide sections to slide along the fiber structure without mutual entanglement.
Vorteile bringt es zudem mit sich, wenn sich bei Abwesenheit des Faserverbands wenigstens zwei Führungsabschnitte gegenseitig und/oder zumindest ein Führungsabschnitt und das mittlere Führungselement berühren. Der vom Faserverband zu passierende Zwischenraum ist in diesem Fall minimal. Unabhängig von dem verwendeten Faserverband bzw. dessen Querschnittsfläche wird somit sichergestellt, dass beim Passieren desselben ein direkter Kontakt mit den Führungsabschnitten bzw. dem mittleren Führungsabschnitt herrscht. Die Führungsabschnitte sollten in diesem Fall jedoch biegsam ausgebildet sein, um ein Zerteilen des Faserverbands in Längsrichtung ausschließen zu können.It also brings advantages if, in the absence of the fiber composite, at least two guide sections contact one another and / or at least one guide section and the middle guide element. The space to be passed by the fiber strand is minimal in this case. Regardless of the fiber structure used or its cross-sectional area is thus ensured that when passing a direct contact with the guide sections and the middle guide section prevails. However, in this case, the guide sections should be made flexible in order to be able to preclude cutting of the fiber structure in the longitudinal direction.
Schließlich kann es von Vorteil sein, wenn die Führungsabschnitte und/oder das mittlere Führungselement Bestandteil eines Einsatzes sind, der bezüglich der Wirbelkammer ortsfest oder beweglich gelagert ist. Führungsabschnitte und mittleres Führungselement sind in diesem Fall gemeinsam mit dem Einsatz austauschbar, so dass die Spinnstelle schnell auf unterschiedliche Faserverbandsarten und/oder -abmessungen angepasst werden kann. Der Einsatz ist vorzugsweise hülsenförmig ausgebildet. Die Führungsabschnitte und/oder das mittlere Führungselement können zudem Bestandteil des Einsatzes oder aber mit diesem verbunden sein.Finally, it may be advantageous if the guide sections and / or the middle guide element are part of an insert which is mounted stationary or movable with respect to the vortex chamber. Guide sections and middle guide element are in this case interchangeable with the insert, so that the spinning position quickly adapted to different types of fiber composite and / or dimensions can be. The insert is preferably sleeve-shaped. The guide sections and / or the middle guide element can also be part of the insert or connected to it.
Weitere Vorteile der Erfindung sind in den nachfolgenden Ausführungsbeispielen beschrieben. Es zeigen:
- Figur 1
- einen Ausschnitt einer teilweise geschnittenen Spinnstelle einer Luftspinnmaschine,
-
Figur 2 - eine Schnittdarstellung eines Ausschnitts einer bekannten Spinnstelle einer Luftspinnmaschine,
-
Figur 3 - einen Ausschnitt einer Schnittdarstellung einer erfindungsgemäßen Luftspinnmaschine (oben) sowie eine Schnittdarstellung entlang der Schnittfläche A-A' (unten),
-
Figur 4 - den Bereich der Eintrittsöffnung der Wirbelkammer einer erfindungsgemäßen Spinnstelle, und
-
Figuren 5bis 9 - alternative Ausführungsformen des in
gezeigten Bereichs.Figur 4
- FIG. 1
- a detail of a partially cut spinning position of an air-spinning machine,
- FIG. 2
- a sectional view of a section of a known spinning position of an air-spinning machine,
- FIG. 3
- a detail of a sectional view of an air-jet spinning machine according to the invention (top) and a sectional view along the sectional surface AA '(bottom),
- FIG. 4
- the region of the inlet opening of the vortex chamber of a spinning station according to the invention, and
- FIGS. 5 to 9
- alternative embodiments of the in
FIG. 4 shown area.
Die
Darüber hinaus kann die Luftspinnmaschine ein Abzugswalzenpaar 26 sowie eine dem Abzugswalzenpaar 26 nachgeschaltete Aufwindevorrichtung 27 (ebenfalls schematisch dargestellt) mit einer Spule 28 zum Aufwinden des die Spinnstelle 22 verlassenden und die gewünschte Drehung aufweisenden Garns 1 umfassen. Die erfindungsgemäße Vorrichtung muss nicht zwangsweise ein Streckwerk 25 aufweisen, wie dies in
Die gezeigte Spinnmaschine arbeitet nach einem Luftspinnverfahren. Zur Bildung des Garns 1 wird der Faserverband 2 über ein mit einer Eintrittsöffnung versehenes Faserführungselement 24 in die Wirbelkammer 3 der Spinnstelle 22 geführt (siehe auch
Generell sei an dieser Stelle klargestellt, dass es sich bei dem hergestellten Garn 1 grundsätzlich um einen beliebigen Faserverbund handeln kann, der sich dadurch auszeichnet, dass ein außenliegender Teil der Fasern (sogenannte Umwindefasern) um einen inneren, vorzugsweise ungedrehten Teil der Fasern, herumgeschlungen ist, um dem Garn 1 die gewünschte Festigkeit zu verleihen. Umfasst ist von der Erfindung also auch eine Luftspinnmaschine, mit deren Hilfe sich sogenanntes Vorgarn herstellen lässt. Bei Vorgarn handelt es sich um ein Garn 1 mit einem relativ geringen Anteil an Umwindefasern, bzw. um ein Garn 1, bei dem die Umwindefasern relativ locker um den inneren Kern geschlungen sind, so dass das Garn 1 verzugsfähig bleibt. Dies ist dann entscheidend, wenn das hergestellte Garn 1 an einer nachfolgenden Textilmaschine (beispielsweise einer Ringspinnmaschine) nochmals mit Hilfe eines Streckwerks 25 verzogen werden soll bzw. muss, um entsprechend weiterverarbeitet werden zu können.In general, it should be made clear at this point that the yarn 1 produced can basically be any fiber composite which is characterized in that an outer part of the fibers (so-called binding fibers) is wrapped around an inner, preferably untwisted part of the fibers to give the yarn 1 the desired strength. Also included in the invention is an air-spinning machine with the aid of which so-called roving can be produced. Roving is a yarn 1 with a relatively small proportion of wraparound fibers, or a yarn 1, in which the wraparound fibers are wound relatively loosely around the inner core, so that the yarn 1 remains deformable. This is crucial if the produced yarn 1 on a subsequent textile machine (For example, a ring spinning machine) is to be distorted again with the help of a
Im Hinblick auf die Luftdüsen 6 sei an dieser Stelle zudem rein vorsorglich erwähnt, dass diese in der Regel so ausgerichtet sein sollten, dass die austretenden Luftstrahlen gleichgerichtet sind, um gemeinsam eine gleichgerichtete Luftströmung mit einem Drehsinn zu erzeugen. Vorzugsweise sind die einzelnen Luftdüsen 6 hierbei rotationssymmetrisch zueinander angeordnet.With regard to the
Bevorzugt weisen die im Stand der Technik bekannten Spinnstellen 22 zudem ein, beispielsweise in das Faserführungselement 24 eingesetztes, Drallstauelement 29 auf. Dieses kann, wie in
Da der gezeigte Pin oder vergleichbare zentral angeordnete Elemente jedoch immer nur von innen auf den das Drallstauelement 29 umgebenden Faserverband 2 einwirken kann, ist die Wirkung desselben begrenzt. Zudem kommt es zu einer mechanischen Belastung der Fasern, die im Bereich des Drallstauelements 29 eine nicht zu vernachlässigende seitliche Umlenkung erfahren.However, since the pin shown or comparable centrally arranged elements can always act only on the inside of the
Im Gegensatz hierzu verfügt die erfindungsgemäße Spinnstelle 22 nun über eine neuartige Führungsanordnung 9, die eine Rückpflanzung der Drehung entgegen der Transportrichtung des Faserverbands 2 bewirkt, ohne hierbei die Anzahl der gewünschten Umwindefasern übermäßig zu verringern.In contrast, the spinning
Wie aus
Um jedoch sicherzustellen, dass trotz der von außen wirkenden Faserführung ein teilweises Herauslösen der äußeren Faserenden 23 möglich ist, um die gewünschten Umwindefasern zu bilden, ist ferner vorgesehen, dass die Führungsanordnung 9 darüber hinaus zumindest ein mittleres Führungselement 11 umfasst, das sich in einem senkrecht zur Längsachse 12 des Abzugskanals 8 verlaufenden Schnitt (siehe
Während
Während sowohl die Führungsabschnitte 10, die vorzugsweise in der in
Ferner muss das mittlere Führungselement 11 nicht zwangsläufig als mit einer Spitze versehener Führungsdorn 15 vorliegen, wie dies beispielsweise
Auch die Form und Ausrichtung der Führungsabschnitte 10 ist prinzipiell nicht auf eine Ausführungsform beschränkt. So wäre es beispielsweise denkbar, anstelle der z. B. in
Hinsichtlich der gezeigten Führungsdorne 15 sei ferner darauf hingewiesen, dass diese mit der Längsachse 12 des Abzugskanals 8 vorzugsweise einen Winkel α einschließen sollten (der aus Übersichtsgründen nur in
Generell ist ferner von Vorteil, wenn sich das der Austrittsöffnung 17 des Abzugskanals 8 zugewandte Ende 18 des mittleren Führungselements 11 in einer parallel zur Längsachse 12 des Abzugskanals 8 verlaufenden Schnitt (entspricht den Darstellungen gemäß der
Zudem sei an dieser Stelle darauf hingewiesen, dass das mittlere Führungselement 11 (bzw. dessen der Austrittsöffnung 17 des Abzugskanals 8 zugewandtes Ende 18) auf der Längsachse 12 des Abzugskanals 8 verlaufen sollte, die wieder kolinear mit der Mittelachse 13 der Eintrittsöffnung 4 angeordnet sein kann. Der Faserverband 2 trifft somit mittig auf das mittlere Führungselement 11 und wird entsprechend seitlich abgelenkt, da es das mittlere Führungselement 11 passieren muss.In addition, it should be noted at this point that the central guide element 11 (or its
Wie schließlich ein Vergleich der
Die vorliegende Erfindung ist nicht auf das dargestellte und beschriebene Ausführungsbeispiel beschränkt. Abwandlungen im Rahmen der Patentansprüche sind ebenso möglich wie eine Kombination der Merkmale, auch wenn sie in unterschiedlichen Ausführungsbeispielen dargestellt und beschrieben sind.The present invention is not limited to the illustrated and described embodiment. Variations within the scope of the claims are just as possible as a combination of features, even if they are shown and described in different embodiments.
- 11
- Garnyarn
- 22
- Faserverbandfiber structure
- 33
- Wirbelkammerswirl chamber
- 44
- Eintrittsöffnung der WirbelkammerInlet opening of the vortex chamber
- 55
- GarnbildungselementGarnbildungselement
- 66
- Luftdüseair nozzle
- 77
- Einlassmündunginlet mouth
- 88th
- Abzugskanalculvert
- 99
- Führungsanordnungguide assembly
- 1010
- Führungsabschnittguide section
- 1111
- mittleres Führungselementmiddle guide element
- 1212
- Längsachse des AbzugskanalsLongitudinal axis of the exhaust duct
- 1313
- Mittelachse der EintrittsöffnungCentral axis of the inlet opening
- 1414
- Führungsplatteguide plate
- 1515
- Führungsdornguide pin
- 1616
- die Eintrittsöffnung umgebende Wandungthe wall surrounding the inlet opening
- 1717
- Austrittsöffnung des AbzugskanalsOutlet opening of the exhaust duct
- 1818
- der Austrittsöffnung des Abzugskanals zugewandtes Ende des mittleren Führungselementsthe outlet opening of the discharge channel facing the end of the central guide element
- 1919
- der Austrittsöffnung des Abzugskanals zugewandtes Ende des Führungsabschnittsthe outlet opening of the discharge channel facing the end of the guide section
- 2020
- der Austrittsöffnung des Abzugskanals abgewandtes Ende des Führungsabschnittsthe outlet opening of the discharge channel end facing away from the guide section
- 2121
- die Wirbelkammer umgebende Wandungthe vortex chamber surrounding wall
- 2222
- Spinnstellespinning unit
- 2323
- freies Faserendefree fiber end
- 2424
- FaserführungselementFiber guide element
- 2525
- Streckwerkdrafting system
- 2626
- AbzugswalzenpaarOff rollers
- 2727
- Aufwindevorrichtungwind-up
- 2828
- SpuleKitchen sink
- 2929
- DrallstauelementTwist retaining element
- 3030
- Einsatzcommitment
- αα
- Winkel zwischen einem Führungsabschnitt und der Längsachse des AbzugskanalsAngle between a guide section and the longitudinal axis of the exhaust duct
Claims (14)
- Spinning position of an air spinning machine for producing a yarn (1) from a fibre assembly (2) consisting of fibres,- wherein the spinning position (22) comprises a vortex chamber (3) with an inlet opening (4) for the fibre assembly (2) being fed in a transporting direction into the vortex chamber (3) during operation of the air spinning machine and further comprises a yarn forming element (5) extending at least partially into the vortex chamber (3),- wherein the spinning position (22) comprises air nozzles (6) directing into the vortex chamber (3) and ending in the vortex chamber (3) in the area of a wall (21) surrounding the vortex chamber (3), by means of which nozzles air can be introduced into the vortex chamber (3) in a preset rotating direction, to give the fibre assembly (2) a rotation in the said direction in the area of an inlet opening (7) of the yarn forming element (5),- wherein the yarn forming element (5) comprises a draw-off channel (8), through which the yarn (1) can be drawn off out of the vortex chamber (3),- wherein a guiding device (9) is arranged in the area of the inlet opening (4) of the vortex chamber (3) for guiding the fibre assembly (2), and- wherein the guiding device (9) comprises at least two guiding sections (10) spaced of each other, the distance between them decreasing at least in parts in the said transporting direction,characterized in that the guiding device (9) further comprises at least one central guiding element (11), that in a sectional view perpendicular to the longitudinal axis (12) of the draw-off channel (8) extends at least partially between the guiding sections (10) and effects a deflection of the fibres of the fibre assembly (2) perpendicularly to the longitudinal axis (12) of the draw-off channel (8).
- Spinning position according to the preceding claim, characterized in that the central guiding element (11), is running at least in sections on the longitudinal axis (12) of the draw-off channel (8) and/or a centre axis (13) of the inlet opening (4) of the vortex chamber (3).
- Spinning position according to the preceding claim, characterized in that the longitudinal axis (12) of the draw-off channel (8) is running parallel to and particularly collinear with to the centre axis (13) of the inlet opening (4).
- Spinning position according to one or several of the preceding claims, characterized in that the guiding sections (10) are formed by guiding pins (15) or guiding plates (14) extending from a wall (16) surrounding the inlet opening (4) of the vortex chamber (3) in direction to the inlet opening (7) of the yarn forming element (5).
- Spinning position according to one or several of the preceding claims, characterized in that one end (18) of the central guiding element (11) facing an outlet opening (17) of the draw-off channel (8) is arranged between the inlet opening (7) of the yarn forming element (5) and the inlet opening (4) of the vortex chamber (3).
- Spinning position according to one or several of the preceding claims, characterized in that the central guiding element (11) is extending beyond the guiding sections (10) in direction of an outlet opening (17) of the draw-off channel (8).
- Spinning position according to one or several of the preceding claims, characterized in that at least a part of the guiding sections (10) and/or the central guiding element (11) is extending into the draw-off channel (8).
- Spinning position according to one or several of the preceding claims, characterized in that the minimum distance between two guiding sections (10) is greater than the minimum distance between one guiding section (10) respectively and one end (18) of the central guiding element (11) facing an outlet opening (17) of the draw-off channel (8).
- Spinning position according to one or several of the preceding claims, characterized in that each guiding section (10) comprises one end (19) facing an outlet opening (17) of the draw-off channel (8) and one end (20) facing away from the outlet opening (17), and that one end (18) of the central guiding element (11) facing the outlet opening (17) of the draw-off channel (8) is placed between the respective ends (19; 20) of the guiding sections (10), in a sectional view parallel the longitudinal axis (12) of the draw-off channel (8).
- Spinning position according to one or several of the preceding claims, characterized in that the central guiding element (11) as well as the guiding sections (10) comprises one end respectively (18; 19) facing the outlet opening (17) of the draw-off channel (8) wherein said ends (19) of the guiding sections (10) are placed in concentric arrangement round the said end (18) of the central guiding element (11) in a sectional view perpendicular to the longitudinal axis (12) of the draw-off channel (8).
- Spinning position according to one or several of the preceding claims, characterized in that the minimum distance between two guiding sections (10) is smaller than the diameter of the draw-off channel (8) in the area of the inlet opening (7) of the yarn forming element (5).
- Spinning position according to one or several of the preceding claims, characterized in that at least one guiding section (10) and the longitudinal axis (12) of the draw-off channel (8) are including an angle α with an absolute value between 10° and 50°, preferably between 20° and 40°, particularly preferably between 25° and 35°.
- Spinning position according to one or several of the preceding claims, characterized in that in case of the absence of the fibre assembly (2) at least two guiding sections (10) contact each other and/or at least one guiding section (10) contacts the central guiding element (11).
- Spinning position according to one or several of the preceding claims, characterized in that the guiding sections (10) and/or the central guiding element (11) are part of an insert (30) which is supported stationarily or movably with respect to the vortex chamber (3).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01634/12A CH706923A1 (en) | 2012-09-07 | 2012-09-07 | Spinning unit of an air spinning machine. |
PCT/IB2013/001799 WO2014037775A1 (en) | 2012-09-07 | 2013-08-16 | Spinning station of an air jet spinning machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2895646A1 EP2895646A1 (en) | 2015-07-22 |
EP2895646B1 true EP2895646B1 (en) | 2017-04-19 |
Family
ID=49510443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13783660.7A Active EP2895646B1 (en) | 2012-09-07 | 2013-08-16 | Spinning station of an air jet spinning machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US9670599B2 (en) |
EP (1) | EP2895646B1 (en) |
CN (1) | CN104583478B (en) |
CH (1) | CH706923A1 (en) |
WO (1) | WO2014037775A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH709466A1 (en) * | 2014-04-03 | 2015-10-15 | Rieter Ag Maschf | Spinning position of an air spinning machine and method for operating an air spinning machine. |
CH709953A1 (en) * | 2014-07-30 | 2016-02-15 | Rieter Ag Maschf | Method for operating an air spinning machine. |
IT201600070676A1 (en) * | 2016-07-07 | 2018-01-07 | Savio Macch Tessili Spa | Air-jet spinning device |
CH712663A1 (en) * | 2016-07-14 | 2018-01-15 | Rieter Ag Maschf | Process for processing a strand-like fiber composite and roving machine. |
DE102017113257A1 (en) * | 2017-06-16 | 2018-12-20 | Maschinenfabrik Rieter Ag | Working point of an air-jet spinning machine and method for opening a spinneret |
CN108532041A (en) * | 2018-06-16 | 2018-09-14 | 苏州市星京泽纤维科技有限公司 | A kind of air vortex spinning machine nozzle for ultra-fine high-strength yarn |
DE102019103271A1 (en) * | 2019-02-11 | 2020-08-13 | Maschinenfabrik Rieter Ag | Spinneret for an air-jet spinning machine and method for opening such a machine |
DE102019120592A1 (en) * | 2019-07-30 | 2021-02-04 | Maschinenfabrik Rieter Ag | Method for piecing a spinning nozzle of an air-jet spinning machine and air-jet spinning machine |
EP3859061A1 (en) * | 2020-01-30 | 2021-08-04 | Saurer Intelligent Technology AG | Fibre bundle receiving 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 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4036119C2 (en) * | 1989-11-14 | 1994-07-07 | Murata Machinery Ltd | Device for producing spun threads |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0489567U (en) * | 1990-12-12 | 1992-08-05 | ||
JPH0674530B2 (en) * | 1991-07-30 | 1994-09-21 | 村田機械株式会社 | Spinning equipment |
JPH07122167B2 (en) * | 1992-03-16 | 1995-12-25 | 村田機械株式会社 | Yarn splicing method for spinning device |
JPH0673618A (en) * | 1992-08-24 | 1994-03-15 | Murata Mach Ltd | Spinning apparatus |
DE4303515A1 (en) * | 1993-02-06 | 1994-08-11 | Thueringisches Inst Textil | Method and device for increasing the nappiness of fibre yarns |
EP0990719B1 (en) * | 1998-10-02 | 2003-05-28 | W. SCHLAFHORST AG & CO. | Spinning device |
DE19926492A1 (en) * | 1998-10-02 | 2000-04-06 | Schlafhorst & Co W | Spinning device |
DE10201577A1 (en) * | 2002-01-17 | 2003-07-31 | Schlafhorst & Co W | Spinning device for producing a spun thread by means of a circulating air stream |
DE50304912D1 (en) * | 2002-03-20 | 2006-10-19 | Rieter Ag Maschf | Air spinning device with channel lining |
DE10261011A1 (en) * | 2002-12-17 | 2004-07-08 | Wilhelm Stahlecker Gmbh | Device for producing a spun thread |
CN1882728B (en) * | 2003-09-12 | 2010-09-01 | 里特机械公司 | Drawing frame-roving frame combination for the production of rove and method for producing rove from the fiber group |
DE102005045703A1 (en) * | 2005-09-19 | 2007-03-22 | Wilhelm Stahlecker Gmbh | Air jet unit for an air jet spinning device |
DE102007009074A1 (en) * | 2007-02-24 | 2008-08-28 | Oerlikon Textile Gmbh & Co. Kg | spinning device |
-
2012
- 2012-09-07 CH CH01634/12A patent/CH706923A1/en not_active Application Discontinuation
-
2013
- 2013-08-16 EP EP13783660.7A patent/EP2895646B1/en active Active
- 2013-08-16 CN CN201380046647.1A patent/CN104583478B/en active Active
- 2013-08-16 US US14/426,570 patent/US9670599B2/en active Active
- 2013-08-16 WO PCT/IB2013/001799 patent/WO2014037775A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4036119C2 (en) * | 1989-11-14 | 1994-07-07 | Murata Machinery Ltd | Device for producing spun threads |
Also Published As
Publication number | Publication date |
---|---|
US9670599B2 (en) | 2017-06-06 |
EP2895646A1 (en) | 2015-07-22 |
WO2014037775A1 (en) | 2014-03-13 |
CH706923A1 (en) | 2014-03-14 |
US20150240393A1 (en) | 2015-08-27 |
CN104583478A (en) | 2015-04-29 |
CN104583478B (en) | 2017-07-11 |
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