CN104126036A - Yarn forming element for a spinning station of an air spinning machine with helical guide elements and method for producing yarn - Google Patents

Abstract

The invention relates to a yarn forming element for a spinning position (2) of an air-jet spinning machine, said yarn forming element (1) having an inlet opening (3) on a frontal face and a draw-off conduit (4), which originates in the region of the inlet opening (3) and extends within the yarn forming element (1), for a yarn (5) produced with the aid of the spinning position (2). According to the invention, a helical guide (8) is arranged within the draw-off conduit (4), said guide (8) aiding a false twist which can be imparted to a yarn (5) passing through the draw-off conduit (4). The invention also relates to an air-jet spinning machine which is characterised in that a helical guide (8) is arranged within the draw-off conduit (4) and/or after an outlet opening (6) of the draw-off conduit (4), said helical guide (8) enabling a false twist to be imparted to the yarn (5). According to the method for producing a yarn (5), the yarn (5) is finally exposed to torque after entering the draw-off conduit (4), said torque causing the yarn (5) to rotate about its longitudinal axis in a second direction of rotation, the second direction of rotation being opposed to the first direction of rotation in the plan view in question, wherein a false twist is produced from the rotation of the yarn (5) about its longitudinal axis.

Description

Yarn forming element for a spinning station of an air spinning machine with helical guide elements and method for producing yarn

The invention relates to a yarn forming element for a spinning station of an air spinning machine, wherein the yarn forming element has an inlet opening on the front side and a discharge channel for the yarn produced by means of the spinning station, said The discharge channel starts in the region of the entry hole and extends inside the yarn forming element. Furthermore, an air spinning machine with at least one spinning station is described, wherein the spinning station has the required inlet for the fiber material to be spun and a vortex chamber arranged downstream of the inlet in the spinning direction and also has a protruding vortex chamber and has an inlet hole and a yarn forming element for the discharge channel of the yarn produced by means of the spinning station, and at least one spinning nozzle leading to the vortex chamber, by means of which the inlet hole can be placed in the vortex chamber A vortex-shaped airflow is generated in the area. Finally, a method for producing yarn by means of a spinning station of an air spinning machine has also been proposed, in which a yarn consisting of individual fibers is fed in the vortex chamber of the spinning station in the region of the inlet opening of the spindle-shaped The fiber material provides a swirling air flow by which a portion of the fiber is wound around the fiber core in a first rotational direction viewed from above to generate a yarn, and wherein the yarn forming element is passed adjacent to the swirl chamber The discharge channel discharges the generated yarn.

Yarn forming elements with an inlet hole at the front side and a discharge channel thereafter are known in the prior art and are used to guide the incoming fiber material to be spun inside the vortex chamber of an air spinning machine. Fibers and yarns made of fibers are guided in the region of the entry holes. During yarn production, the stretched or homogeneous fiber material is usually introduced into the vortex chamber by means of the feed rollers against the warp thread guide elements and encounters a tangential vortex there. Finally, this air flow causes the outer fiber ends of the fiber material to wrap around and wrap around the untwisted core fibers in the region of the entry hole of the yarn forming element. The yarn produced in this way is finally discharged from the spinning station via a discharge channel and can be wound, for example, onto a bobbin.

Although this method has been proven to work for a long time, the correspondingly produced yarns generally do not have an optimum strength. The object of the present invention is therefore to improve the yarn forming elements known from the prior art and the air spinning machines equipped with said yarn forming elements, as well as to improve the method for producing yarn by means of an air spinning machine so that The open-end spinning machine produces yarns with particularly high yarn tenacity.

The thread forming element which now solves this task is characterized in that a helical guide element is arranged in the discharge channel, by means of which false twisting of the yarn passing through the discharge channel is permitted. The yarn forming elements known from the prior art always have a discharge channel with a cylindrical or frustoconical wall in order to remove as little friction as possible in the area of the entry hole from the wrap caught by the air flow. The entangled untwisted fiber core of the fibers (outer fiber ends of the fiber material leading to the vortex chamber) is discharged. In contrast to this, the core of the invention is to at least partially modify the known shape of the discharge channel in order to force the yarn - contrary to known rules - to false twist. This refers to the rotation of the yarn about its longitudinal axis, where the guide element passes and the rotation re-slackens. Unlike the permanent twist that the wrapping fibers acquire during spinning in the region of the entry hole of the discharge channel, the guide element according to the invention generates only a temporary twist, which loosens itself before the yarn is wound.

This temporary false twist in the region behind the discharge channel inlet hole has the following advantages:

The yarn ends protruding laterally from the fiber material introduced into the vortex chamber during spinning are caught by the tangentially acting air flow and surround the almost untwisted core fiber (i.e. the fibers surrounding the fiber material, so The fibers are mainly or all located inside the same fiber material, and therefore the air flow cannot enter), resulting in a yarn with true twist. In the process, the wrapping fiber exerts a torque on the core fiber (another name: fiber core) in the region of the entry hole, so that without the guide element according to the invention there is the danger that the fiber core is in the sun gear-shaped fiber (Fasersonne) region also rotates in the direction of the airflow. However, the rotation is released again after passing through the inlet opening (this is therefore also a false twist), since the so-called torque only acts outside the outlet channel. However, it is also possible for the wrapping fibers of the finished yarn to be rotated back (that is to say against the direction of the air flow) by a large distance by a corresponding counter-rotation of the core fiber associated with the release of the false twist. As a result, there is a possibility of loosening of the fiber bundles, resulting in a loss of yarn strength.

Undesirable effects can now be easily counteracted in the outlet channel by means of the helical guide element according to the invention. At the same time the invention is based on the fact that the passage of the (helical) vortex also produces a torque on the filamentary material (such as a yarn produced by means of an air spinning machine), causing said filamentary material to rotate around its longitudinal direction. Axis rotation. The reason for this is the friction between the filamentary material and the surface of the guide element. If a corresponding guide element is placed in the discharge channel, the finished yarn will rotate which in turn generates a torque on the fibers in the region of the entry hole upstream of the discharge channel. If the helical guide element has a direction of rotation that is opposite to the direction of rotation of the air flow generated by the spinning nozzles in the vortex chamber, the following effects are observed:

Due to the vortex generated by the spinning nozzle, the wrapping fibers generate a torque towards the core fiber in the region of the inlet opening of the discharge channel, which torque acts in the direction of the air flow. However, the part of the yarn in the region of the helical guide element generates a torque on the core fiber which acts in the opposite direction (provided, of course, that the direction of rotation of the helical guide element is opposite to the direction of rotation of the gas flow). As a result the core fiber in the region of the entry hole rotates in the opposite direction to the direction of rotation of the wrap fiber, so that the wrap fiber does not wrap around the untwisted fiber core but around the pre-twisted fiber core.

If the yarn produced in this way leaves the area of the helical guide element, the rotation of the core fiber caused by the guide element is loosened again, ie the core rotates in the direction in which the wrapping fibers encircle the core. But the fiber core cannot rotate without the wrapping fibers surrounding the fiber core rotating together, so the wrapping fibers now also rotate (additionally) in the wrapping direction. This way the wrapping fibers wrap around the fiber core more tightly and firmly (which at this stage is the same as if it were not twisted), resulting in a particularly strong yarn.

Before the structural details of the helical guide element according to the present invention are described in detail below, it should be explained in advance here that the yarn forming element can be a hollow spindle protruding into the vortex chamber, or it can only refer to the spinning tip, Together with the spindle body supporting the spinning tip, it forms the corresponding hollow spindle.

However, it is particularly advantageous if the yarn forming element comprises a spinning tip with an inlet opening and a spindle supporting the spinning tip, wherein the discharge channel extends inside the spinning tip and inside the spindle body and wherein the helical guide element is arranged in the spinning Tip inside. Thus, by suitable selection of the spinning point it is also possible to use helical guide elements whose geometry (number of turns, pitch, pitch, etc.) can be adapted to the respective material to be spun. Guidance can also be achieved by means of a corresponding insert with a helical guide element, which will be described in more detail below, provided that a multi-part hollow spindle is particularly simple, since the spinning tip can be detachably connected to the spindle body connected. Finally, it is also conceivable to arrange the guide element exclusively or additionally within the spindle body, ie connected to the spinning tip.

It is particularly advantageous if the discharge channel has a helically extending section which forms a helical guide element for the yarn. In this case, the discharge channel itself acts as a helical guide element without the need for additional elements. In this case, for example, the lower discharge channel first runs straight (ie without a corresponding winding) for a distance from the inlet opening and then transitions into a bend. The discharge channels eventually run helically in this region, with a pitch that is approximately uniform, but can also be increasing or decreasing. The resulting thread-forming element has an internally extending discharge channel which in turn has a partial segment which extends tubularly and which extends through the thread-forming element according to the assumed helix. Finally, a rectilinearly extending discharge channel section is provided directly behind the spiral section. The helical portion can also directly adjoin the access hole, so that the aforementioned linear initial portion can be omitted.

In addition to the helical shape of the discharge channel, however, it is also advantageous when the helical guide element is formed by a single helically extending guide element. In this case, the discharge channel itself can also be rectilinear, eg in the form of a hole, in which one or more guide elements can additionally be arranged, which ensure the generation of the false twist. In other words, the helical guide element can be formed by an insert arranged inside the discharge channel, which can be fixedly (by gluing, welding, soldering, etc.) connected to the yarn forming element, or detachably (for example by screw connection) to the yarn forming element. Since the insert and the discharge channel are manufactured separately, the overall manufacture of the yarn forming element is greatly simplified from a structural point of view.

It is also advantageous if the insert has, on the surface facing the inner wall of the discharge channel, a helical, preferably groove-shaped, recess which, together with the adjacent part of the inner wall, forms a helical guide element in the form of a helical channel. In this case, the insert does not have a corresponding helical hole, which is considered as an introduction channel for the yarn. In fact, the aforementioned channels are produced by the interaction of the surface portion of the insert (in the form of the boundary surface of the recess) and the corresponding mating surface abutting against the inner wall of the yarn forming element of the insert. Said recesses can be introduced in a simple manner by material grinding into, for example, a cylindrical base body, however, taking into account the formation of the helical channel, there is no need to rework the recesses of the yarn forming elements for receiving the finished inserts ( For example hole shape).

Furthermore, it may also be advantageous to configure the guide element as a wire wrap. The winding element can likewise be made as an insert and preferably has a small diameter of not more than 1 mm in order to ensure a corresponding deflection which produces a false twist in the yarn. In this case, like all other guide elements according to the invention, the pitch of the windings can be constant over the longitudinal extension of the winding part, but can also be varied over the longitudinal extension, for example (uniformly) increased or decreased.

Furthermore, it can be advantageous when the number of turns of the helical guide element is between 0.2 and 5, preferably between 1 and 3. A high number of winding turns leads to a particularly strong rotation of the core fiber in the region of the entry hole, while a low number of winding turns results in low friction between the yarn and the guide element, so that the outer fibers of the yarn are subjected to only minimal mechanical stress . Even if, for example, the guide element can have only half windings, it has a helical contact surface for the yarn, that is to say the contact surface has a curvature and extends in the longitudinal direction of the remaining discharge channel, so that a helix is produced. or a spiral curve.

It is advantageous when the distance between the access opening and the helical guide element is between 1 mm and 10 mm, preferably between 1 mm and 5 mm. It is advantageous if the distance is as small as possible, since the torque generated by the guide element should act on the core fiber which is exposed in the region of the inlet opening, so that the core fiber rotates in the opposite direction of the gas flow in the exposed fiber end. However, a certain distance is advantageous in order to form a front stop of the insert with the guide element.

It is also very advantageous that the helical guide element viewed from above presents an arc having a central angle α with respect to the longitudinal axis of the yarn forming element, the degree of which is at least 60°, preferably at least 120° °, particularly preferably at least 180°. Thus, as already mentioned, the guide element does not have a complete turn of the wire, but a corresponding false twist can be produced therein due to the curved shape.

Finally, it may be advantageous if the insert is formed from a plurality of, preferably similar, individual elements, wherein the individual elements are connected to one another in a force-fit and/or form-fit manner. In other words, it is also possible to use “basic windings” which are designed in such a way that they can be connected to one or more other basic windings in a form-fitting and/or force-fitting manner. As a result, there arises the possibility that the length of the insert or the number of turns of the discharge channel varies due to the number of individual elements connected to one another. At the same time, the individual elements have, for example, one or more depressions on their front side and one or more extensions on the opposite front side. If two individual elements are joined together, one or more extensions of one of the individual elements engage into recesses of an adjacent individual element. The one or more extensions or depressions preferably have a non-circular cross-section in at least one area, so that the individual elements connected together cannot be twisted relative to each other. This means that individual elements connected to one another can form a stepless discharge channel which extends along the entirety of the individual elements. Furthermore, it is also possible for the insert part to consist of a starting part, an end part and one or more identical intermediate parts, wherein the starting part has an inlet bevel and the end part has an outlet bevel. The number of middle pieces ultimately determines the overall length of the insert (it is also possible to use no middle pieces). Finally, the insert can also consist of a plurality of identical individual elements which each have an inlet bevel and an outlet bevel. At the same time, the contours of the inlet bevel and outlet bevel are preferably adapted in such a way that they form a form fit and ensure the described torsion resistance when connecting the individual elements.

Finally, the air spinning machine according to the invention is characterized in that a helical guide element is arranged in the discharge channel and/or after the outlet of the discharge channel, by means of which the yarn is falsely twisted. With regard to possible embodiments and advantages, reference is made to the above description, in which all individual features can be used in any desired combination, as long as no apparent contradiction arises. Furthermore, it may also be advantageous to arrange a helical guide element downstream of the discharge channel outlet in addition to or instead of the guide element.

It is particularly advantageous if at least one spinning nozzle is oriented tangentially with respect to the inlet opening, so that an air flow can be generated by means of the spinning nozzle (the air flow has a first direction of rotation when viewed from above), and also that the helical The guide element has a winding (rotating in a second direction opposite to the first in a top view). This results in two torques, wherein the torque produced by the air flow ensures that the bare fiber end of the fiber material introduced into the vortex chamber is wound around the core fiber in the first direction of rotation, while the torque produced by the guide element Torque rotates in the opposite direction. The core fibers are thus pre-tensioned to some extent before the bare fibers are placed around the fiber core as wrap fibers. Finally, after passing through the guide channel, the entire yarn is rotated in the invention mainly in the direction of the wrapping fibers around the fiber core, so that the winding of the wrapping fibers is strengthened and the rotation of the fiber core is loosened.

Finally, according to the invention there is provided a method for producing yarn by means of a spinning station of an air spinning machine, in which method the yarn, after entering the discharge channel, is subjected to a torque which causes the yarn to wind around its longitudinal The shaft rotates in a second direction of rotation, wherein the second direction of rotation is opposite to the first direction of rotation as seen from a top view, and wherein false twist occurs due to the rotation of the yarn about its longitudinal axis. Torque can be applied to the yarn in the discharge channel and/or after the discharge channel. Furthermore, the torque can also be generated pneumatically, but also by means of mechanical elements.

It is therefore advantageous, for example, to generate the torque by means of a helical guide element which is arranged in the outlet channel and/or downstream of the outlet of the outlet channel. With regard to the structural features of the guide element, reference can again be made to the above description, while all features here can be realized individually or in any combination, as long as there is no apparent contradiction.

Further advantages of the invention are described in the following examples. The figure shows:

Fig. 1 is a partial sectional side view of a section of an air spinning machine according to the prior art.

Figure 2 is a cross-section of each yarn when passing through a known yarn forming element (a)) and through a yarn forming element (b)) according to the invention,

Figure 3 is a partial sectional side view of a yarn forming element according to the invention,

Figure 4 is a partial side view of another yarn forming element according to the invention, and

Figure 5 is a side view and a top view of an intermediate piece of a multi-part insert for a yarn forming element according to the invention, and

Figure 6 is a side view of a helical guide element according to the invention.

Figure 1 shows a partial cutaway side view of a spinning station 2 of a known air spinning machine. The spinning station 2 comprises a fiber guide element 21 with an inlet 19 and a guide channel 15 through which the fiber material 20 to be spun and generally present in the form of drawn fiber bundles enters the so-called eddy chamber of the spinning station 2 18. The actual spinning process takes place here again. The stretching is usually carried out by a draw frame connected upstream of the fiber guide element 21 , from which the stretched fiber bundle is drawn out by means of a pair of take-off rollers. Finally, the fiber bundle is preferably gripped by the pair of feed rollers 16 which should be arranged as directly as possible behind the fiber guide element 21 in order to avoid incorrect bending.

After the fiber material 20 has passed through the fiber guide element 21 via the guide channel 15 of the fiber guide element 21 , it enters the active area of the spinning nozzles 7 of the plurality, usually tangentially, of the swirl chamber 18 . If an overpressure is applied to the spinning nozzles via the corresponding supply pipe 14 during spinning, a vortex flow is generated which flows around the upper part of the hollow spindle protruding into the vortex chamber 18 . If the outwardly protruding fiber ends are caught by said air flow, the fiber material 20 produces the required rotation in the region of the entry hole 3, resulting in the desired yarn 5, which can finally pass through the entry hole 3 and subsequently The discharge channel 4 is discharged from the swirl chamber 18.

In addition to one-piece hollow spindles, multipart hollow spindles are also known for a long time, which, as shown in FIG. 1 , consist of a spindle body 10 and a spindle tip connected thereto. The connection takes place, for example, in the schematically indicated connection region, wherein a form-fit and/or non-positive connection is possible. After the area around the access hole 3 has been deformed by wear, the spinning tip 9 can eventually be replaced independently of the spindle body 10 . This also applies if it is assumed that the fiber material 20 to be spun is to be replaced.

During spinning, the outer fiber ends, which form the so-called sun gear fibers 22 , are influenced by the air flow generated by the spinning nozzle 7 , which exerts a corresponding torque on the fiber ends through its tangent. This torque ultimately also acts on the untwisted fiber core 23 , which therefore also tries to rotate in the direction of the airflow. Such rotation of the fiber core 23 is however to be avoided. The reason for this is the fact that a potential rotation of the fiber core 23 is loosened again in the discharge channel 4 since there is no rotationally stabilizing torque to act here. It is thus possible to counter-rotate the entire yarn 5, i.e. the fiber core 23, in the discharge channel 4, so that the wrapping fibers 24 also rotate in the opposite direction to the direction of rotation of the wrapping fibers 24 (=fiber ends surrounding the fiber core) . In this case, the wrapping fiber 24 will loosen a large section again, so that the strength of the yarn 5 will decrease.

In order to eliminate this effect and to cause additional twisting of the wrapping fibers 24 in the direction of their existing rotation caused by the air flow, it is proposed according to the invention that in the discharge channel 4 (or also in the discharge channel 4 if required) After the outlet 6 of the channel) a helical guide element 8 is arranged, by means of which the yarn 5 passing through the discharge channel 4 is false twisted (ie rotated, and the rotation is loosened again after being not fixed in the guide). At the same time, the direction of rotation of the helical guide element 8 is opposite to the direction of rotation of the air flow, so that the guide element 8 exerts a torque on the core fiber in the region of the entry hole 3 to counteract the force exerted by the air flow on the fiber ends constituting the sun gear 22. torque. In other words, the inner fiber core 23 rotates in the opposite direction to the direction of rotation of the fiber ends caught by the gas flow.

This effect is illustrated in Figure 2, where the orientation of the individual fibers is indicated by correspondingly oriented hatching.

As can be seen from FIG. 2 a) and from the drawings describing the prior art, the fibers constituting the fiber core 23 are parallel in the area in front of the inlet hole 3 (area "I"), i.e. not themselves Rotation (the bare fiber end which moves in this region as the sun-gear fiber 22 around the fiber core 23 is not shown and is also not important for understanding). When the fiber core 23 is drawn through the inlet hole 3 into the interior of the discharge channel 4, the bare fiber ends end up surrounding the fiber core 23, so that in principle an image as shown in area "II" in Fig. 2a is produced. Since the discharge channel 4 is configured in the known spinning station 2 as a hollow cylinder shape or a frustoconical shape, the yarn 5 in the other zone ("III") is not further ahead of the outlet of the discharge channel 4. rotation without any change in the orientation of the fibers constituting the fiber core 23 and the corresponding wrapping fibers 24 .

In contrast to this, the fibers constituting the fiber core 23 are rotated after passing through the inlet hole 3 (region "II") (see FIG. 2 b )). The reason for this is the torque already described, which transmits the thread 5 twisted by means of the guide element 8 according to the invention to the fiber core 23 in the region of the entry hole 3 . The rotation of the fiber core 23 present in region "II" is opposite to the rotation of the wrapping fiber 24 because said torque counteracts the torque exerted by the gas flow on the bare outer fiber end.

Finally, the yarn 5 reaches the zone “III” behind the guide element 8 . The fiber core rotation is finally released here because the yarn 5 behind the spinning station 2 is fixed by means of a corresponding drawing device (for example in the form of a drawing roller pair) in such a way that it cannot pass through the drawing device. Keep spinning. In this way, the closer the yarn portion with false twist is to the drawing device, the opposite torque acts, which finally ensures the counter-rotation of the fiber core 23 . But at the same time, the wrapping fibers 24 also rotate in the same direction, so that the rotation in the same direction is strengthened. The end result of the spinning process carried out by means of the air spinning machine according to the invention is a particularly strong yarn 5 .

FIG. 3 shows a structural possibility of realizing the guide element 8 according to the invention. In the exemplary embodiment shown, the thread forming element 1 has an approximately cylindrical insert 12 , on the surface of which a helical recess 13 configured as a groove extends. Together with the adjacent part of the wall of the central hole, this recess forms a helical channel which, at the two end faces of the insert 12 , merges, for example, into a bevel, through which the yarn 5 enters the channel and can leave it again. The helical guide element through the yarn 5 finally produces false twist inside the helically extending part 11 of the discharge channel 4 (which is defined inwardly by the recess 13), but it loosens again behind the guide element 8 and thus The wrapping fibers 24 are made stronger, as shown in FIG. 2 (region "III").

Purely for the avoidance of doubt, it should also be pointed out here that the spinning nozzle 7 shown in FIG. 1 should enter the swirl chamber 18 tangentially in the yarn forming element 1 according to FIG. This air flow (into the hole 3 in top view) turns counterclockwise in order to ensure that the core fiber entering the region of the hole 3 and the fiber ends constituting the sun gear 22 rotate in the desired direction opposite to each other.

Furthermore, it may be advantageous to configure the insert 12 in multiple parts. For example, FIGS. 4 and 5 show corresponding embodiments.

As can be seen from these figures, the illustrated insert 12 comprises a start piece 16 having an inlet bevel 25, an end piece 28 having an outlet bevel 27, and an intermediate piece 29 disposed therebetween. In the snap-fitted state, the start part 26 , the intermediate part 29 and the end part 28 each have contact surfaces 30 which abut against one another and rotationally fastened positively engaging one another.

As can be seen from FIG. 5 , the rotation resistance can be achieved, for example, by the interaction of the corresponding extension 31 and the corresponding depression 32 . For example, the intermediate piece 29 has an extension 31 in the region of one of its two end faces and a corresponding recess 32 in the region of its opposite end face. If, in the embodiment shown in FIG. 4 , the starting part 26 also has a corresponding recess 32 on its downward facing end face, then the intermediate part 29 can be connected together with the starting part 26 via its extension 31 in a form-fitting manner. . A corresponding connection to the end piece 28 is also possible, provided that the end piece has an extension 31 on its contact surface 30 facing the middle part 29 which corresponds to the depression 32 of the middle part 29 .

Finally, the multi-part insert 12 has the advantage that the number of intermediate parts 29 used can be varied depending on the respective process parameters (fibrous material 20 to be spun, spinning speed, etc.). If the end piece 28 is coupled directly to the start piece 26 , a particularly short outlet channel 4 results, but this can be lengthened by correspondingly inserting one or more intermediate pieces 29 .

It is of course also possible to design the start part 26 , the end part 28 and the middle part 29 identically, so that the corresponding insert part 12 can again consist of the same basic elements. It is particularly conceivable in this respect that each base element has an inlet bevel 25 and an outlet bevel 27 (similar to the insert 12 in FIG. 3 ), wherein the inlet bevels of two adjacent base elements in the installed state 25 and the outlet bevel 27 abut each other so that they cannot be twisted against each other and a continuous discharge channel 4 results.

Finally, FIG. 6 shows another possibility of realizing the guide element 8 according to the invention.

Instead of using the insert 12 shown in FIG. 3 , it is also possible to deflect the yarn 5 by means of a wire winding 17 (in addition to windings made of metal, of course other materials can also be used). The diameter of the wire winding member 17 should be smaller than that of the yarn 5 to be produced to prevent the yarn 5 from passing through the wire winding member 17 without generating false twist.

Finally, the winding can enter the spinning tip 9 in the form of an insert 12, into the spindle body 10 supporting the spinning tip 9, into a one-piece hollow spindle, or else (viewed in the spinning direction) be arranged Downstream of the yarn forming element 1 . At the same time the number of turns, pitch or thickness of the winding is to be selected according to the judgment of a professional, so that the description in FIG. 6 is only considered as an example. In any case, however, the yarn is rotated by the helical guide element, which is released again behind the guide element.

The invention is not restricted to the shown and described embodiment. Modifications such as combinations of features are possible within the framework of the patent claims, even if these are illustrated and described in different embodiments.

List of Reference Marks

1 Yarn forming element

2 spinning station

3 access hole

4 discharge channels

5 yarn

6 exit

7 spinning nozzle

8 helical guide elements

9 spinning tip

10 spindle

11 Helically extending part of the discharge channel

12 inserts

13 Notches

14 supply pipe

15 guide channel

16 Feed to Lola

17 wire winding parts

18 Vortex chamber

19 Entrance

20 fiber material

21 Fiber guiding element

22 sun gear fibers

23 fiber core

24 wrapped fiber

25 Entrance bevel

26 starting piece

27 exit slope

28 end pieces

29 Middleware

30 contact surface

31 extension

32 depression

Claims (16)

1. A yarn forming element for a spinning station (2) of an air spinning machine, wherein the yarn forming element (1) has an access hole (3) on the front side and a (2) a discharge channel (4) of the produced yarn (5), which starts in the region of the entry hole (3) and extends inside the yarn forming element (1), characterized in that , a helical guide element (8) is arranged in the discharge channel (4), by means of which helical guide element (8) allows false twisting of the yarn (5) passing through the discharge channel (4). 2. The yarn forming element according to the preceding claim, characterized in that said yarn forming element (1) comprises a spinning tip (9) with said entry hole (3) and a spinning tip (9) supporting said spinning the spindle body (10) of the tip (9), wherein the discharge channel (4) extends inside the spinning tip (9) and inside the spindle body (10), and wherein the helical guide element (8) is arranged inside said spinning tip (9). 3. The yarn forming element as claimed in one or more of the preceding claims, characterized in that said discharge channel (4) has a helically extending portion (11 ), said helically extending portion (11) constitutes the helical guide element (8) for the yarn (5). 4. The thread forming element according to the preceding claim, characterized in that the helical guide element (8) is formed by an insert (12) arranged inside the discharge channel (4). 5. The yarn forming element according to the preceding claim, characterized in that the insert (12) has a helical and preferably groove-shaped surface on the surface facing the inner wall of the discharge channel (4). A recess (13) which, together with an adjacent part of the inner wall, constitutes a helical guide element (8) in the form of a helical channel. 6. The thread forming element as claimed in one or more of the preceding claims 4 to 6, characterized in that the insert (12) is configured as a thread winding (17). 7. The thread forming element according to one or more of the preceding claims, characterized in that said helical guide element (8) is wound with a number of turns between 0.2 and 5, preferably between Between 1 and 3. 8. The thread forming element as claimed in one or more of the preceding claims, characterized in that the distance between said entry hole (3) and said helical guide element (8) is 1 mm and 10mm, preferably between 1mm and 5mm. 9. The yarn forming element as claimed in one or more of the preceding claims, characterized in that said helical guide element (8) presents an arc of a circle seen from above, said circle The arc has a central angle α with respect to the longitudinal axis of the thread forming element (1), which measures at least 60°, preferably at least 120°, particularly preferably at least 180°. 10. The yarn forming element as claimed in one or more of the preceding claims 4 to 9, characterized in that said insert (12) is made of a plurality of individual elements, in particular of starting elements (26 ), an end piece (28) and one or more identical intermediate pieces (29), or a plurality of identical individual elements together, wherein the individual elements are connected to each other in a non-positive manner and/or in a shape connected in a coordinated manner. 11. An air spinning machine having at least one spinning station (2), wherein the spinning station (2) has a required inlet (19) for the fiber material (20) to be spun and A vortex chamber (18) arranged downstream of the inlet (19) in the spinning direction and also having a vortex chamber (18) protruding into the vortex chamber (18) and having an access hole (3) and for producing by means of a spinning station (2) The yarn forming element (1) of the discharge channel (4) of the yarn (5) and at least one spinning nozzle (7) leading to said swirl chamber (18), by means of which the spinning nozzle can A vortex flow is generated in the region of the inlet hole (3) in the vortex chamber (18), characterized in that it is arranged in the discharge channel (4) and/or behind the outlet (6) of the discharge channel (4) A helical guide element (8) is provided, by means of which helical guide element (8) allows false twisting of the yarn (5). 12. Air spinning machine according to the preceding claim, characterized in that the yarn forming element (1) is constructed according to one or more of the preceding claims. 13. Air spinning machine as claimed in one or more of claims 11 and 12, characterized in that said at least one spinning nozzle (7) is tangentially oriented with respect to said inlet hole (3) so that by means of the spinning nozzle (7) it is possible to generate an airflow having a first direction of rotation in a top view, and the helical guide element (8) has a winding whose direction of rotation is in the The top view viewing angle is seen in a second direction opposite to said first rotational direction. 14. A method for producing a yarn (5) by means of a spinning station (2) of an air spinning machine, wherein in the region of the entry hole (3) of the spindle-shaped yarn forming element (1) The fibrous material (20) consisting of individual fibers is provided in the vortex chamber (18) of the spinning station (2) with a vortex air flow through which a part of the fibers is rotated in a first rotation as seen from a top view direction around the fiber core (23), thereby producing a yarn (5), and wherein the yarn is discharged through the discharge channel (4) of the yarn forming element (1) adjacent to the swirl chamber (18) (5) discharged, characterized in that the yarn (5) is subjected to torque after entering the discharge channel (4), and the torque makes the yarn (5) rotate around its longitudinal axis rotates in a second direction of rotation, wherein said second direction of rotation is opposite to said first direction of rotation as seen in said top view, and wherein false twist is produced due to rotation of said yarn (5) about its longitudinal axis . 15. The method according to the preceding claim, characterized in that torque is applied to the yarn (5) in and/or after the discharge channel (4). 16. The method as claimed in one or more of claims 14 and 15, characterized in that the torque is generated by means of a helical guide element (8) arranged in the discharge within the channel (4) and/or after the outlet (6) of said discharge channel (4).