COMPRESSOR DEVICE

Description

[0001] The invention relates to a compacting device for compacting a fiber sliver which is drawn in a drafting system of a textile machine.

[0002] In connection with textile machines, especially spinning machines, both drafting systems and associated compression devices have long been known and are described, in some cases in detail, in numerous patent applications. A compression device according to the preamble of claim 1 is known, for example, from document DE 29 46 722 A1.

[0003] The documents US 2 091 153 A1 and FR 853 923 A each disclose a compressor device with an inlet opening arranged radially on the outer edge of a first end face, an outlet opening arranged radially on the outer edge of the other end face and an open guide channel connecting the inlet opening and the outlet opening and having a helical shape radially on the outer circumference.

[0004] The familiar drafting systems are located upstream of the spinning units of textile machines and draw a supplied feed material, usually a fiber sliver or roving, to the desired fineness. Such drafting systems have several pairs of rollers arranged one behind the other in the direction of travel of the fiber sliver, which rotate at different circumferential speeds and transport the fiber sliver to the corresponding spinning units.

[0005] Since the peripheral speed of the roller pairs increases in the direction of travel of the fiber sliver, the fiber sliver is continuously accelerated within the drafting system and subjected to a so-called draw draft. In existing drafting systems, the total draw draft of the fiber sliver varies greatly depending on the textile machine in question.

[0006] In the drafting systems of air-jet spinning machines, for example, the total draft of the sliver can be 180 times higher, while the drafting systems of roving machines, for example of flyers, generally operate with significantly lower total drafts.

[0007] The compactness and hairiness of the drawn fiber sliver are among the decisive factors for the quality of the fiber material delivered by the drafting system.

[0008] This means that when entering the drafting system, the fiber sliver has a width that is initially reduced to a significantly smaller width during the drafting process. At the exit of the drafting system, in the area of ​​the so-called spinning triangle, the width should then be significantly less than the intermediate width of the incoming material.

[0009] During the drawing process, however, there is the problem that edge fibers are often either not integrated and cause increased fiber fly, or that the edge fibers are integrated in a disordered manner, which leads to increased hairiness and a larger width of the spinning triangle and thus to a reduction in the quality of the drawn fiber sliver.

[0010] In order to ensure reliable guidance and the best possible compaction of the fiber sliver during drafting of the feed material and thus the smallest possible width of the spinning triangle, the known drafting systems often also have so-called compaction units.

[0011] DE 10 2011 015 748 A1, for example, describes a drafting system for a roving machine which has a pre-drafting zone, a main drafting zone and a downstream compression zone.

[0012] A compression unit, referred to as a condenser component in DE 10 2011 015 748 A1, is positioned in the compression zone. The condenser component has an upwardly open guide slot for the fiber sliver, with the guide slot being significantly taller than it is wide. The condenser component is intended to even out the thickness of the fiber sliver and reduce its hairiness, thus improving the quality of the feed material.

[0013] Furthermore, DE 10 2013 017 636 A1 discloses drafting systems for the air-jet spinning units of air-jet spinning machines that are equipped with comparable compressor units.

[0014] One of the embodiments shown shows and describes a drafting system which is designed as a so-called four-roll drafting system and has a pre-drafting zone, a middle drafting zone and a main drafting zone.

[0015] In this well-known four-roller drafting system, a pre-compressor is located in front of the drafting system's input roller pair, and a second compressor is positioned in the pre-drafting section. Furthermore, the main drafting section of the drafting system is equipped with a third compressor.

[0016] In this well-known splicing system, the compression units are also intended to reduce the hairiness of the drawn fiber sliver or increase the number of wrapped fibers.

[0017] A four-roller drafting system for the air-jet spinning units of air-jet spinning machines is also described in DE 10 2015 110 980 A1.

[0018] This well-known drafting system is also equipped with a special device to improve the quality of the drawn fiber sliver. This four-roller drafting system features a false twist device located in the pre-drafting section of the drafting system, which twists the fiber sliver with alternating directions of rotation before it is drawn to the desired yarn count in the main drafting section and fed to an air-jet spinning unit.

[0019] The alternating direction of rotation of the fiber sliver is intended to minimize fiber deflections of the edge fibers, which occur particularly due to the air flow in the area of ​​the output rollers of the drafting system rotating at relatively high speed.

[0020] Although the drafting systems described above offer various possibilities for improving the quality of a hidden sliver, they cannot completely solve the problem that edge fibers are formed when the sliver is drawn or that the sliver has insufficient compactness, so that a relatively wide spinning triangle is often formed at the output side of the drafting system.

[0021] Based on the aforementioned prior art, the invention is based on the object of developing a compression unit for a drafting system arranged upstream of the spinning device of a textile machine, which is designed in such a way that it is ensured during the drafting process that the width of the fiber sliver to be drawn is reliably minimized both in the area of ​​the main draft and in the area of ​​the spinning triangle created on the output side of the drafting system.

[0022] This object is achieved according to the invention by a compressor device having the features of claim 1.

[0023] Advantageous embodiments of the invention are the subject of the subclaims.

[0024] The inventive design of the compacting device has the particular advantage that the supplied fiber sliver, which initially enters the inlet opening of the guide channel of the channel compactor in a flat horizontal orientation, is slightly rotated within the channel compactor and temporarily acquires a false twist. This means that upon exiting the guide channel of the channel compactor, the fiber sliver is rotated in such a way that the edge fibers are immediately compacted in the subsequent pair of draw rollers, thus resulting in an initial compaction of the fiber sliver.

[0025] This means that by compacting the twisted sliver, the edge fibers are incorporated to a high degree, which not only leads to a reduction in fiber fly, but also to a minimization of the width of the spinning triangle, with the result that there is an overall increase in the quality of the produced feedstock material.

[0026] According to the invention, the rotation between the inlet opening and the outlet opening of the guide channel of the channel compressor is between 30° and 160°, preferably 90°.

[0027] Due to such a twisted arrangement of the inlet and outlet openings of the guide channel, the fiber sliver not only receives a temporary so-called false twist, which leads to a positive stabilization of the feed material, but it is also prepared for further compaction by the downstream drafting rollers.

[0028] It has proven particularly advantageous if the sliver is rotated by 90°, i.e. if the sliver, which originally runs in a horizontal orientation, is rotated into a vertical orientation in the guide channel of the channel compressor and runs in this orientation into the subsequent pair of drafting rollers.

[0029] According to the invention, the guide channel further provides a clear cross-section formed by two ellipses that narrow on both sides toward the center. Numerous tests have shown that such a design of the guide channel cross-section can always ensure uniform and secure guidance of the fiber sliver in the helical guide channel under all conditions.

[0030] The channel compressor is preferably manufactured from an abrasion-resistant plastic using a 3D printing process. Polyamides have proven advantageous as plastics, as they can be three-dimensionally produced in virtually any shape using fused deposition modeling. This means that the production of the channel compressor according to the invention using a 3D printing process represents an advantageous, relatively simple manufacturing process.

[0031] The channel compressor according to the invention can of course also be manufactured using another 3D printing process.

[0032] Different locations are also possible with regard to the installation position of the channel compressor according to the invention.

[0033] In the case of drafting systems of textile machines that operate with relatively high draft values, such as the drafting systems of air-jet spinning machines, positioning the channel compressor according to the invention both in the area of ​​the pre-drafting zone of the drafting system and in the area of ​​the middle drafting zone of the drafting system of the air-jet spinning unit can be advantageous.

[0034] Such an arrangement keeps the distance between the channel compressor and the output roller pair of the drafting system relatively small, which has a very positive effect on the development of the width of the spinning triangle that is set on the output side of the output roller pair of the drafting system.

[0035] In connection with drafting systems for air spinning units, however, it has been found that arranging the channel compressor in front of the input roller pair of the drafting system or arranging several channel compressors simultaneously at different positions of a drafting system can be quite advantageous.

[0036] In particular, when several channel compactors are arranged simultaneously, the twisted sliver processed by the roller pairs of the drafting system is compacted several times, so that the width of the sliver in the area of ​​the drafting system and in the area of ​​the spinning triangle is minimized.

[0037] Even in textile machines whose drafting systems operate with relatively low draft values, for example in flyers, various arrangements of the channel compressor according to the invention can be advantageous.

[0038] For example, tests have shown that both an arrangement of the channel compressor in front of the draw-in roller pair of the drafting system and an arrangement of the channel compressor in the area of ​​the pre-drafting field of the drafting system are quite advantageous.

[0039] It has been shown, for example, that with such arrangements of the channel compressor with the drafting systems, flyer slivers can be produced that are significantly more compact and less hairy than the flyer slivers known to date.

[0040] This means that with the drafting systems of flyers, in which a channel compactor according to the invention is positioned in front of the draw-in roller pair of the drafting system or in the area of ​​the pre-drafting field of the drafting system, flyer rovings can be produced which have considerable advantages in their subsequent processing on ring spinning machines.

[0041] These improved flyer slivers, for example, resulted in spinning triangles being created during the spinning process on the drafting systems of the ring spinning machines, which are significantly wider than the previously usual spinning triangles, which is a good sign of excellent quality of the drawn sliver.

[0042] Different designs are also conceivable with regard to the exact design of the guide channel of the channel compressor.

[0043] In a first embodiment, the guide channel of the channel compressor can, for example, be designed such that it has its maximum width in the region of its horizontally arranged inlet opening. This maximum width then tapers along the guide channel and finally has its minimum width in the region of the outlet opening, which is arranged vertically rotated relative to the inlet opening.

[0044] In another advantageous embodiment, it is provided that the guide channel of the channel compressor has a width in the region of its horizontally arranged inlet opening, which changes in the sense of "growing" over the course of the guide channel and has a maximum width in the region of the outlet opening arranged rotated in the vertical direction with respect to the inlet opening.

[0045] Which of the two embodiments described above is more advantageous can depend on various factors, for example the material of the fiber sliver or the flyer sliver, the desired fineness of the drawn material, the degree of fiber sliver drawing, etc.

[0046] The invention is explained in more detail below with reference to the embodiments shown in the drawings.

[0047] It shows: Fig. 1 schematically shows in front view an air-jet spinning machine with a plurality of spinning stations, each having an air-jet spinning unit with an upstream drafting system, Fig. 2 in side view a drafting system arranged in front of an air-jet spinning unit, designed as a four-roller drafting system, with a channel compressor according to the invention in the area of ​​the central drafting zone, Fig. 3 in side view a four-roller drafting system according to Fig.2 , with a channel compressor according to the invention in the area of ​​the pre-drafting field of the drafting system, Fig. 4 the four-roller drafting system according to Fig.2in side view, with a channel compressor according to the invention in front of the input roller pair of the drafting system, Fig. 5 in side view a working station of a flyer, with a three-roller drafting system, which has a channel compressor according to the invention in the area of ​​the pre-drafting field of the drafting system, Fig. 6 a perspective view of a first embodiment of the channel compressor according to the invention, Fig. 7 the channel compressor according to Fig.6 , in front view, Fig. 8 a second embodiment of a channel compressor, Fig. 9 a further, third embodiment of a channel compressor.

[0048] The Figure 1 shows a front view, very schematically, of an air-jet spinning machine 1. As shown, such air-jet spinning machines 1 have, between their end frames 15, 16 arranged at their ends, a plurality of work stations 2 arranged next to one another in a row, which are often also referred to as spinning stations.

[0049] At these spinning stations 2, feedstock material, for example, fiber sliver 4 stored in a spinning can 3, is processed. This means that at these spinning stations 2, the fiber sliver 4 is spun into a yarn.

[0050] The spinning stations 2 are equipped with various devices for this purpose. For example, the spinning stations 2 each have a drafting system 5, an air-jet spinning unit 6, a yarn take-off device 7, a yarn clearer 8, and a winding device 11.

[0051] The drafting system 5, which can be designed, for example, as a four-roller drafting system or as a three-roller drafting system, also has a Fig. 1 For reasons of better clarity, the channel compressor according to the invention is not shown.

[0052] This channel compressor 40 according to the invention is described below with reference to Figures 2 to 9 be explained in detail.

[0053] As in Fig.1As indicated, the yarn produced from the fiber sliver 4 in the air spinning unit 6 is wound in intersecting layers onto a winding bobbin 17 by an associated thread traversing device 9, so that a cross-wound bobbin is produced.

[0054] The cross-wound bobbin 17 is held, as usual, in a bobbin frame (not shown) and is rotated during spinning by a bobbin drive (also not shown). As shown in Figure 1 As further shown, the work stations 2 of the air-jet spinning machine 1 are supplied by an automatically operating operating unit 12 which, guided on rails 13, 14, can be moved along the work stations designed as spinning stations 2.

[0055] The Figures 2 , 3 and 4 each show a positioning possibility of a channel compressor 40 according to the invention arranged in the area of ​​a drafting system 5.

[0056] In the embodiments, the drafting system 5, which draws a fiber sliver 4, is designed as a four-roller drafting system and is arranged in front of an air-jet spinning unit 6 of an air-jet spinning machine 1.

[0057] According to Fig.2 the channel compressor 40 according to the invention is positioned, for example, in the area of ​​the so-called central drafting field 33.

[0058] As can be seen, a fiber sliver 4 drawn off from a spinning can 3 (not shown) is drawn into the drafting device 5 by a pair of draw-in rollers 22, which is formed by an upper roller 18 and a lower roller 19, and is then transported to the air-jet spinning unit 6 by means of further pairs of rollers 24, 26, 28 and is thereby drawn.

[0059] The roller pairs 24, 26, 28 each consist of an upper roller 20 and a lower roller 25, an upper roller 21 and a lower roller 27 or of an upper roller 23 and a lower roller 29. The upper roller 21 and the lower roller 27 each interact with one of the aprons 30 and 31, respectively, which are arranged in the area of ​​the so-called main drafting zone 34. The upper roller 23 and the lower roller 29 represent the output roller pair 28 of the drafting system 5. This means that in the present four-roller drafting system 5, viewed in the running direction F of the fiber sliver 4, the first two roller pairs 22, 24 form a pre-drafting zone 32 for the fiber sliver 4. The subsequent drafting system section between the roller pair 24 and the roller pair 26 forms a so-called central drafting zone 33, in which the channel compactor 40 designed according to the invention is also arranged, while the roller pairs 26, 28, as already indicated above, form the main drafting zone 34 of the drafting system 5.

[0060] As can be seen, the fiber sliver 4 is transported by the roller pairs 22, 24, 26 and 28 to the air spinning unit 6.

[0061] Since the circumferential speeds of the roller pairs 22, 24, 26, 28 increase in the running direction F of the fiber sliver, the fiber sliver 4 is stretched during transport.

[0062] The stretching of the fiber band 4 can, for example, lead to 180 times its original length.

[0063] As in Fig. 2 Further shown, the air spinning unit 6 has a nozzle device 42 on the inlet side, whose nozzles 43, 44 are connected to a compressed air source 46 via a pneumatic line 45. Adjoining the nozzle device 42 is a hollow spinning cone 47, which is surrounded by an air chamber 48, which is connected to a vacuum source 50 via a further pneumatic line 49.

[0064] During spinning, the air flowing out of the nozzles 43, 44 generates a rotational flow that is applied to the drawn fiber sliver 4. This means that, in the interaction of the nozzle device 42 and the spinning cone 47, a yarn 10 is formed in the air-jet spinning unit 6, which is drawn out of the air-jet spinning unit 6 through the hollow spinning cone 47.

[0065] Further details on the spinning process using such air spinning units 6 can be found, for example, in DE 199 26 492 A1.

[0066] According to the embodiment of the Fig.2The channel compactor 40, designed according to the invention and arranged in the region of the central drafting zone 33, ensures, during the drawing process, by means of its helical guide channel 35, that the fiber sliver 4, which initially enters the drafting system 5 in a flat horizontal orientation, is rotated in the channel compactor 40 into a vertical orientation, for example. The fiber sliver 4 is thereby temporarily given a false twist, which leads to an all-round compaction of the fiber sliver 4.

[0067] This all-round compaction of the fiber sliver 4 is not only maintained during the passage of the fiber sliver 4 through the drafting system 5, but is further reinforced in the drafting system 5.

[0068] The Fig.3 The illustrated embodiment differs from the embodiment according to Fig. 2 merely by arranging the channel compressor 40 designed according to the invention in the area of ​​the drafting system 5.

[0069] As can be seen, the channel compressor 40 according to the invention is in the embodiment of the Fig.3 positioned in the area of ​​the pre-drafting field 32 of the drafting system 5.

[0070] Even with such an arrangement of the channel compressor 40, the fiber sliver 4 temporarily receives a false twist and is thereby compacted on all sides.

[0071] Also in Fig.4 The embodiment shown differs from the embodiments according to Figure 2 and 3 essentially by the arrangement of the channel compressor 40 designed according to the invention in the area of ​​the drafting system 5.

[0072] As can be seen, the channel compressor 40 according to the invention is positioned in front of the feed roller pair 22 of the drafting system 5 in this embodiment.

[0073] Such an arrangement of the channel compressor 40 results in the fiber sliver 4 being rotated from a flat horizontal orientation into, for example, a vertical orientation before entering the drafting system 5.

[0074] Even if the channel compactor 40 is arranged in front of the feed roller pair 22 of the drafting system 5, the fiber sliver 4 temporarily receives a false twist and is thereby compacted on all sides.

[0075] The further integration of edge fibers into the fiber sliver 4 associated with the compaction of the vertically aligned fiber sliver 4 not only leads to an improvement in the quality of the fiber sliver 4 entering the air spinning unit, but also to a significant reduction in the fiber fly generated during the spinning process.

[0076] The Fig.5shows a highly schematic side view of a working station of a roving machine, in the illustrated embodiment, the working station of a so-called flyer 51.

[0077] As is known, by means of such flyers 51, fiber slivers 4, which are twist-free, are drawn and processed into flyer slivers which already have some yarn twist.

[0078] These flyer rovings, which have a slight yarn twist, are then spun into fine yarns on textile machines downstream in the production process, such as ring spinning machines.

[0079] As shown, the working stations of such flyers 51 generally have two flyer wings 51 rotatably mounted in a wing bank 52, each of which is supplied by an upstream three-roller drafting system 5.

[0080] In the present embodiment, a channel compressor 40 designed according to the invention is also arranged in the area of ​​the pre-drafting field 32 of the drafting system 5.

[0081] As can be seen, a fiber sliver 4, preferably drawn off from a spinning can 3 (not shown), is drawn into the drafting device 5 by a pair of draw-in rollers 22, which is formed by an upper roller 18 and a lower roller 19, and is then drawn by means of the pairs of rollers 26, 28 of the drafting device 5.

[0082] As usual, the roller pairs 26, 28 each consist of an upper roller 21 or 23 and a lower roller 27 or 29, wherein, viewed in the running direction F of the fiber sliver 4, the first two roller pairs 22, 26 form a pre-drafting zone 32 in which a channel compressor 40 designed according to the invention is arranged.

[0083] The roller pairs 26, 28 form the subsequent main drafting field 34 of the drafting system 5, wherein the roller pair 28 also represents the output roller pair 28 of the drafting system 5.

[0084] The fiber sliver 4 is transported by the roller pairs 22, 26 and 28 to the flyer wing 51 rotatably mounted in a wing bank 52 and is thereby stretched as the circumferential speeds of the roller pairs 22, 26, 28 increase in the running direction F of the fiber sliver 4.

[0085] The rotating flyer wing 51 also ensures that the drawn fiber sliver receives a slight twist, i.e., becomes a so-called shaped flyer sliver.

[0086] As with the drafting systems for air-jet spinning units, the channel compactor 40, designed according to the invention and arranged in the area of ​​the pre-drafting zone 32, also ensures, by means of its helical guide channel 35, that the fiber sliver 4, which initially enters the drafting system 5 in a flat horizontal orientation, is twisted into a vertical orientation, for example, as it passes through the channel compactor 40. The fiber sliver 4 thus temporarily acquires a false twist, which leads to all-round compaction of the fiber sliver 4.

[0087] This all-round compaction of the fiber sliver 4 is not only maintained during the passage of the fiber sliver 4 through the drafting system 5, but in the area of ​​the roller pairs 26, 28 a compaction of the vertically aligned fiber sliver 4 takes place with the result that a further increased integration of the edge fibers into the fiber sliver 4 takes place.

[0088] The resulting flyer sliver is significantly more compact and less hairy than previously known, which makes it easier to process in the subsequent operation on a ring spinning machine. This means that when processing such compact and less hairy flyer slivers, spinning triangles with a reduced width are created at the spinning stations of the ring spinning machines, which represents a significant improvement in the quality of the flyer sliver.

[0089] The Figure 6 shows on a larger scale and in a perspective view an embodiment of a channel compressor 40 according to the invention, which is preferably manufactured from an abrasion-resistant plastic using a 3D printing process.

[0090] As can be seen, the channel compressor 40 has a guide channel 35 with an inlet opening 36 and an outlet opening 37, wherein the inlet opening 36 is arranged horizontally in the installed state of the channel compressor 40.

[0091] This means that the inlet opening 36 of the channel compressor 40 has its greatest width in the horizontal direction when the channel compressor 40 is fastened to the associated drafting system structure, for example by means of locking devices 41.

[0092] In this installed state, a fiber band 4, whose running direction is in the Fig.5 marked with F, in a flat, horizontal orientation through the inlet opening 36 into the guide channel 35 of the channel compressor 40.

[0093] Since the outlet opening 37 is arranged rotated by an angle α with respect to the inlet opening 36, in the embodiment of the Figures 6, 7 , 8 and 9by 90° each, the fiber band 4 is also rotated as it passes through the channel compressor 40 and has a vertical orientation after leaving the channel compressor 40.

[0094] According to the embodiment of the Figures 6 and 7 The guide channel 35 has a clear cross-section formed by two ellipses 38 that narrow toward the center. This means that web-like projections 39 are provided between the ellipses 38.

[0095] Such a design ensures a uniform, safe guidance of the fiber sliver 4 during its passage through the channel compressor 40.

[0096] The Fig. 7 shows the channel compressor 40 according to the invention according to Fig. 6 in front view.

[0097] As is clearly visible here, the outlet opening 37 is arranged at an angle α relative to the inlet opening 36. In the exemplary embodiment, the angle α is 90°, for example. However, other angles, for example, between 30° and 160°, are also conceivable.

[0098] The Figures 8 and 9 show possible embodiments of a channel compressor 40, which do not fall under the subject matter of the present invention, but contribute to the understanding of the channel compressor according to the invention.

[0099] The Fig.8 discloses a channel compressor 40, the guide channel 35 of which has a maximum width B in the region of its horizontally arranged inlet opening 36.

[0100] As can be seen, this maximum width B tapers in the course of the guide channel 35 and finally has a minimum width BX in the region of the outlet opening 37 which is arranged rotated in the vertical direction with respect to the inlet opening 36.

[0101] The Fig.9 shows a channel compressor 40 that is comparable in principle.

[0102] In this embodiment, the guide channel 35 of the channel compressor 40 has a minimum width B 1 in the region of its horizontally arranged inlet opening 36.

[0103] This minimum width B 1 changes in the course of the guide channel 35 and then has a maximum width B 1 +X in the area of ​​the outlet opening 37, which is also arranged rotated in the vertical direction with respect to the inlet opening 36. List of reference symbols

[0104] 1 Air-jet spinning machine 2 spinning station 3 spinning can 4 Sliver 5 drafting system 6 Air spinning unit 7 Thread take-off device 8 Yarn cleaner 9 Thread traversing device 10 yarn 11 winding device 12 Control unit 13 rail 14 rail 15 End frame 16 End frame 17 cross-wound bobbin 18 top roller 19 Lower roller 20 top roller 21 top roller 22 Feed roller pair 23 top roller 24 pair of rollers 25 Lower roller 26 pair of rollers 27 Lower roller 28 pair of rollers 29 Lower roller 30 Straps 31 Straps 32 Pre-drafting field 33 Central draft field 34 Main drafting zone 35 Guide channel 36 Entrance opening 37 Exit opening 38 ellipse 39 projection 40 Channel compressor41 locking device 42 Nozzle device 43 nozzle 44 nozzle 45 Pneumatic line 46 Compressed air source 47 spinning cone 48 air chamber 49 Pneumatic line 50 Negative pressure source 51 Flyer 52 grand piano bench 53 wing F Direction of travel

Claims

1. Compressor device (40) for compacting a sliver (4) which is drawn in a drafting system (5) of a textile machine (1, 51), wherein the compressor device (40) is designed as a channel compressor and has a guide channel (35) which is formed helically in the running direction (F) of the sliver (4), the inlet opening (36) of which guide channel, for introduction of the sliver (4) into the guide channel (35), has its greatest width in the horizontal direction, and the outlet opening (37) of which guide channel, for exit of the sliver (4) introduced via the inlet opening (36) and guided via the helical guide channel (35) from the channel compressor, is arranged so as to be rotated by at least 30° with respect to the inlet opening (36), wherein the rotation within the channel compressor between the inlet opening (36) and the outlet opening (37) of the guide channel (35) is between 30° and 160°, characterized in that the guide channel (35) has a clear cross section formed by two ellipses (38) which narrow on both sides toward the center.

2. Compressor device (40) according to claim 1, characterized in that the rotation between the inlet opening (36) and the outlet opening (37) of the guide channel (35) is 90°.

3. Compressor device (40) according to either claim 1 or claim 2, characterized in that the compressor device (40) designed as a channel compressor is manufactured from an abrasion-resistant plastics material in a 3D printing process.

4. Compressor device (40) according to any of the preceding claims, characterized in that the guide channel (35) of the channel compressor (40), in the region of its horizontally arranged inlet opening (36), has a maximum width (B) which tapers along the guide channel (35) and has a minimum width (BX) in the region of the outlet opening (37), which is arranged so as to be rotated in the vertical direction with respect to the inlet opening (36).

5. Compressor device (40) according to any of the preceding claims, characterized in that the guide channel (35) of the channel compressor (40), in the region of its horizontally arranged inlet opening (36), has a width (B1) which changes along the guide channel (35) and has a maximum width (B1+X) in the region of the outlet opening (37), which is arranged so as to be rotated in the vertical direction with respect to the inlet opening (36).

6. Drafting system (5) for an air spinning unit (6) or a flyer (51), wherein the drafting system (5) comprises a pre-drawing zone (32), characterized in that a compressor device (40) according to any of the preceding claims is arranged in the region of the pre-drawing zone (32).

7. Drafting system (5) for an air spinning unit (6), wherein the drafting system (5) comprises a mid-drawing zone (33), characterized in that a compressor device (40) according to any of claims 1 to 5 is arranged in the region of the mid-drawing zone (33).

8. Drafting system (5) for an air spinning unit (6) or a flyer (51), wherein the drafting system (5) comprises an intake roller pair (22), characterized in that a compressor device (40) according to any of claims 1 to 5 is arranged upstream of the input roller pair (22) of the drafting device (5) in the running direction of the sliver (4).