EP2895646B1 - Spinning station of an air jet spinning machine - Google Patents

Description

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.

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. In this case, 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.

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.

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.

While the known in the prior art and acting on the outside of the fiber structure twist accumulation elements restrict a corresponding rotation propagation, in return usually a reduction of Umwindefasern is to be accepted (see in particular the above EP 0 990 719 B1 ).

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 object is achieved by a spinning station with the features of patent claim 1.

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.

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.

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.

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).

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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 5 bis 9

alternative Ausführungsformen des in Figur 4 gezeigten Bereichs.

Further advantages of the invention are described in the following exemplary embodiments. Show it:

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.

The FIG. 1 shows a schematic view of a section of an air-spinning machine. If required, 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. Furthermore, 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).

In addition, 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. To form the yarn 1, 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 FIG. 2 ). There it receives 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 Garnbildungselements 5. Because the fiber structure 2 is drawn off from the vortex chamber 3 through an inlet mouth 7 of the yarn formation element 5 via a discharge channel 8 arranged inside the yarn formation element 5, the free fiber ends 23 (see FIG FIG. 1 ) are pulled in the direction of the inlet mouth 7 and loop as so-called Umwindefasern to the centrally extending core fibers - resulting in the desired rotation having yarn. 1

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 drafting system 25 or must, in order to be further processed accordingly.

With regard to 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. Preferably, 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.

However, since the pin shown or comparable centrally arranged elements can always act only on the inside of the fiber structure 2 surrounding the spiral dam element 29, the effect of the same is limited. In addition, there is a mechanical load on the fibers, which undergo a non-negligible lateral deflection in the region of the twist dam element 29.

In contrast, 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 Umwindefasern.

How out FIG. 3 can be seen, 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). In other words, 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.

However, in order to ensure that partial removal of the outer fiber ends 23 is possible despite the externally acting fiber guide to form the desired Umwindefasern, it is further provided that 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. In other words, 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. In this way, 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.

While 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

While both the guide portions 10, preferably in the in FIG. 3 shown below sectional view concentrically about the middle guide member 11 are arranged, and the middle guide member 11 may be placed outside the Garnbildungselements 5 ( FIG. 4 ), it is also conceivable that either the Guide sections 10 ( FIG. 5 ) or the middle guide element 11 (FIG. FIG. 6 ) extend into the discharge channel 8 of the Garnbildungselements 5.

Furthermore, 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. For example, 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. In FIG. 4 shown 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.

With regard to the guide pins 15 shown, it should also be pointed out that these should preferably enclose an angle α with the longitudinal axis 12 of the discharge channel 8 (which, for reasons of clarity, should only be included in FIG FIG. 5 The amount is a value between 10 ° and 50 °, preferably a value between 20 ° and 40 °, particularly preferably a value between 25 ° and 35 ° , occupies.

In general, it is furthermore advantageous if 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. In this way, it is ensured that 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.

In addition, it should be noted at this point that 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.

How finally a comparison of FIG. 9 with, for example, the FIG. 6 shows, 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 Garnbildungselements 5. Alternatively, however, it is also possible to fix the guide sections 10 and / or the middle guide element 11 elsewhere. For example, an in FIG. 9 indicated use (eg sleeve-shaped trained) use 30, which comprises the guide portions 10 and / or the middle guide member 11 or to which the said components are attached.

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.

Legend

1

yarn

2

fiber structure

3

swirl chamber

4

Inlet opening of the vortex chamber

5

Garnbildungselement

6

air nozzle

7

inlet mouth

8th

culvert

9

guide assembly

10

guide section

11

middle guide element

12

Longitudinal axis of the exhaust duct

13

Central axis of the inlet opening

14

guide plate

15

guide pin

16

the wall surrounding the inlet opening

17

Outlet opening of the exhaust duct

18

the outlet opening of the discharge channel facing the end of the central guide element

19

the outlet opening of the discharge channel facing the end of the guide section

20

the outlet opening of the discharge channel end facing away from the guide section

21

the vortex chamber surrounding wall

22

spinning unit

23

free fiber end

24

Fiber guide element

25

drafting system

26

Off rollers

27

wind-up

28

Kitchen sink

29

Twist retaining element

30

commitment

α

Angle between a guide section and the longitudinal axis of the exhaust duct

Claims (14)

1. 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).
2. 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).
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).
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).
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).
6. 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).
7. 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).
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).
9. 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).
10. 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).
11. 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).
12. 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°.
13. 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).
14. 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).

Images