EP4067543A1 - Method and device for producing a textile fibre composite - Google Patents

Abstract

In a method for producing a textile fiber composite, a fiber mass (3) is separated into individual fibers (2) by means of an opening roller (5) integrated in a housing (6). The fibers leave the housing through a fiber outlet opening (10) by being detached from the opening roller at the latest at a knock-off edge (20) of the fiber outlet opening (10) and entering a fiber feed channel (11). The fiber feed channel is oriented towards a fiber collection surface (23) and has an orifice (12). The fibers are then fed to the circumferential, perforated, vacuumed fiber collection surface (23), deposited there, compacted and transported away. No negative pressure is applied to the mouth (12) of the fiber feed channel (11) and the fibers are thereby detached from the opening roller without negative pressure and reach a fiber guide surface (19) of the fiber feed channel (11). In a corresponding device, the end of the cover surface (22) facing away from the opening roller (5) is at a distance (A) from the fiber collection surface (23), so that the mouth (12) of the fiber feed channel (11) is free of negative pressure.

Description

The present invention relates to a method for producing a textile fiber composite, in which a fiber mass is separated into individual fibers by means of an opening roller integrated in a housing and the fibers leave the housing through a fiber outlet opening by being detached from the opening roller at the latest at a knock-off edge of the fiber outlet opening and enter a fiber feed channel, wherein the fiber feed channel is aligned to a fiber collection surface and has an opening and the fibers are then fed to the surrounding, perforated, vacuumed fiber collection surface, deposited there, compacted and transported away. The invention further relates to a device for producing a textile fiber composite, with an opening roller that separates a fiber mass into individual fibers and with a peripheral, perforated, suckable fiber collection surface that is arranged above a suction channel and where the opening roller is arranged in a housing and that housing has a fiber feed opening and a fiber outlet opening, a knock-off edge and a fiber feed channel are arranged on the fiber outlet opening of the opening roller housing, with the fiber feed channel being aligned towards the fiber collection surface and having an opening and a fiber guide surface of the fiber feed channel adjoining the knock-off edge and the suctioned fiber guide surface following the fiber guide surface Fiber collecting surface is arranged and opposite the fiber guiding surface a top surface of the fiber feed channel is arranged and facing away from the opening roller ends of the fiber guiding surface and de r top surface form the mouth of the fiber feed channel.

The dissolving of a fiber mass into individual fibers by means of a dissolving roller is widely used in staple fiber processing. through the When the fiber mass is dissolved, it is freed from shell particles and other dirt and the fibers are parallelized. The parallel fibers are then fed to a tape or yarn formation. The fibers are removed from the opening roller by means of negative pressure in a shielded fiber guide channel or by means of slowly rotating removal rollers. Both methods lead to a certain degree of disorientation of the fibers both in the air flow and due to compression during mechanical removal.

From the EP 887 448 B1 It is known that for the production of a textile yarn, in which fibers separated from a sliver are sucked onto a circumferential fiber collecting surface by means of an opening roller, forming a fiber structure. The fiber collection surface has a perforation connected to a suction source. A twist-tightened and drawn-off yarn is continuously formed from fibers lying parallel and stretched. The fibers are deposited on the fiber collection surface in a compacted manner by suction on a perforation track guided via a suction opening, and the fiber bundle that is compacted on the fiber collection surface and discharged from the deposition area as a fiber sliver without rotation is fed directly to a rotation device that imparts a real rotation, which solidifies it into a yarn. The disadvantage here is that the fibers collide with the evacuated fiber collection surface and the previously parallel fibers are disoriented again.

It is therefore the object of the present invention to eliminate the disadvantages known from the prior art and to enable fiber deposition which maintains the parallelism of the fibers on the fiber collection surface and the fibers can be correspondingly compacted and transported away.

The object is achieved by a method and a device having the features of the independent patent claims.

A method for producing a textile fiber composite is proposed, in which a fiber mass is separated into individual fibers by means of an opening roller integrated in a housing and the fibers leave the housing through a fiber outlet opening by being detached from the opening roller at a knock-off edge of the fiber outlet opening and into a fiber feed channel enter. The fiber feed channel is oriented toward a fiber collection surface and has an orifice. The fibers are then fed to the circumferential, perforated, vacuumed fiber collection surface, deposited there, compacted and transported away.

According to the invention, the mouth of the fiber feed channel is free of negative pressure. Accordingly, no negative pressure is applied to the mouth of the fiber feed channel. The suction of the fiber collecting surface thus does not have such an effect on the fiber feed channel that it makes a significant contribution to the detachment of the fibers from the opening roller. As a result, the fibers are detached from the opening roller without vacuum and then reach a fiber guide surface of the fiber feed channel and the suctioned fiber collection surface, where they are stretched and oriented. The fibers form a fiber composite on the fiber collection surface. The stretching of the fibers is maintained or further enhanced on the fiber collection surface. This fiber orientation can be used on the evacuated fiber collection surface to generate a very even compression of the fiber composite. A very uniform and strong yarn is produced from this compacted fiber composite by the subsequent spinning device.

For example, an air spinning device, a ring spinning device, a friction spinning device or a pot spinning device can be used as the spinning device. The method according to the invention can thus be used in spinning devices which usually have a drafting system use for feeding the fibers to the actual spinning device. Instead of the drafting system, the opening roller is now used with a fiber feed channel on which no negative pressure is applied in order to detach the fibers from the opening roller.

It is also advantageous if the fibers are detached from the opening roller by the centrifugal force acting on the fibers. The fibers are released solely by the centrifugal force generated by the acceleration of the fibers by the opening roller. Since the additional suction forces are absent, the fibers are oriented particularly well in parallel.

There are advantages if at least some of the fibers roll over at the knock-off edge. Fibers that have not yet been completely detached from the opening roller due to the centrifugal force are slowed down at the knock-off edge and by the overturning and move with their residual energy along the fiber guide surface of the fiber feed channel in the direction of the suctioned fiber collection surface. The knock-off edge thus has a mechanical effect on the fibers hitting there, causing the fibers to turn by approximately 180°.

There are also advantages if an air speed in the fiber feed channel increases towards the mouth. Due to the narrowing of the fiber feed channel in the direction of the flight path of the fibers, the fibers are transported through the channel by the air flow generated by the opening roller and then reach the zone of the suctioned fiber collection surface. This increase in air velocity advantageously contributes to the stretching of the fibers.

In a particularly preferred embodiment of the invention, the fibers are twisted together during and/or after being deposited on the fiber collection surface. This results in a fiber composite in the form of a fuse, the one has small twist and allows spinning on the subsequent spinning device. This rotation is created by the fiber movement, the movement of the fiber collecting surface and the air flow of the suction of the fiber collecting surface. The fiber collection surface is preferably a screen apron or a screen roller that is moved over a suction channel. The suction channel includes suction openings that can have different shapes. For example, the suction openings can be aligned transversely and, for example, in the form of slots to the transport direction of the fibers. In this case, the fibers lie against the edge of the slit and are compressed. This also causes the fibers to twist. Further suction openings can then be present in the course of the suction channel in order to maintain the orientation of the fibers and to complete the compression. These additional suction openings can be designed, for example, round or transverse to the direction of transport. Overall, the stationary suction openings in conjunction with the moving perforated fiber collection surface and the movement of the fibers coming from the fiber feed channel cause the fibers to be twisted and compressed as a fiber composite and delivered to a take-off device, for example a pair of take-off rollers, which transport the fibers away from the fiber collection surface.

Advantageously, the fibers are spun into a thread after being transported away from the fiber collection surface. The fibers are twisted with one another in a rotational movement directed along the longitudinal axis of the fiber assembly.

A device according to the invention for producing a textile fiber composite has an opening roller separating the fiber mass into individual fibers and a peripheral, perforated, vacuumed fiber collection surface which is arranged above a suction channel with at least one suction opening. The opening roller is arranged in a housing and the housing has a fiber feed port and a fiber exit port. A knock-off edge and a fiber feed channel are arranged at the fiber outlet opening of the opening roller housing, the fiber feed channel being aligned with the fiber collecting surface and having an opening. A fiber guiding surface of the fiber feed channel adjoins the knock-off edge and the fiber collecting surface which is sucked off is arranged following the fiber guiding surface. A cover surface of the fiber feed channel is arranged opposite the fiber guide surface and the ends of the fiber guide surface and the cover surface facing away from the opening roller form the mouth of the fiber feed channel.

According to the invention, the end of the cover surface facing away from the opening roller is at a distance from the fiber collection surface, so that the mouth of the fiber feed channel is free of negative pressure. The orifice is therefore not directed directly at the fiber collection surface that is sucked off, so that the suction on the fiber collection surface has no or at least no significant influence on the detachment of the fibers from the opening roller. The end of the top surface of the fiber feed channel is accordingly aligned in such a way that air can flow out of the housing of the opening roller to the environment. As a result, the fibers are largely stretched and fed parallel to one another to the fiber-guiding surface.

It is advantageous if the fiber guiding surface and the fiber collecting surface form an angle of between +/-30°. Depending on the speed of the opening roller and the fiber properties, it can be advantageous if the transition from the fiber guiding surface to the fiber collecting surface does not take place in a straight line, but rather at an acute angle. This can improve the straight and parallel handover from the fiber guiding surface to the fiber collecting surface.

There are advantages if the fiber guide surface has a kink angle of between +/- 30°. The kink angle forms two sections on the fiber guiding surface, with a first section towards the knock-off edge and a second portion is inclined towards the fiber collection surface. This kink angle can improve the transfer of the fibers from the knock-off edge to the fiber-guiding surface. It supports a rollover of the fibers when they are stopped at the knock-off edge and reach the fiber guide surface.

There are also advantages if the mouth of the fiber feed channel is delimited by at least one side surface between the fiber guide surface and the top surface. The side surfaces ensure that the fibers detached from the opening roller reach the fiber guiding surface and the fiber collection surface. It has turned out to be advantageous if the two side surfaces run largely parallel to one another. A narrowing of the fiber feed channel to increase the flow speed in the fiber feed channel is thus preferably brought about exclusively by the inclination of the fiber guide surface and the top surface to one another. If there is only one side surface, the transported air can escape laterally, as a result of which the transport and placement of the fibers can be further improved.

It is also advantageous if the fiber outlet opening has a larger cross section than the mouth of the fiber feed channel. As a result, the fibers detached from the opening roller are gradually guided onto the fiber-guiding surface with increasing flow speed, even if they are not detached directly at the knock-off edge. The stretching of the fibers and the parallelism of the fibers to one another is maintained or even improved.

It is also advantageous if the distance between the end of the top surface facing away from the opening roller and the fiber collecting surface is more than 3 mm, preferably more than 5 mm. The mouth thus has a height of more than 3 mm. Due to this height of the mouth and the feature that the mouth is not aimed directly at the suctioned fiber collection surface is ensured that the suction of the fiber collection surface does not affect the detachment of the fibers from the opening roller. This prevents the fibers from being compressed.

Furthermore, it is advantageous if the suctioned fiber collection surface is a sieve apron or a sieve roller. A screen apron can be used to create a fiber collection surface of almost any length. The fibers thus have sufficient opportunity to be calmed down and, if necessary, compressed. In contrast, the screen roller has the advantage that it takes up less space.

There are also advantages if the fiber collecting surface which is sucked off has a fiber compacting device, in particular a row of suction slots arranged in a stationary manner. The fibers are compressed at the edge of the suction slot by at least one suction slot positioned at an angle to the transport direction of the fibers. The superimposition of the transport speed of the fiber collection surface, the movement of the fibers emerging from the feed channel and the suction effect of the suction channel imparts a rotation to the fibers and the fiber composite thus produced. Before the fiber assembly is removed from the fiber collecting surface, the fiber composite deposited on the fiber collecting surface thus forms a kind of roving, with a twist and a smaller cross section.

In an advantageous embodiment of the invention, the suction opening, preferably several suction openings, of the suction channel extends obliquely and/or transversely to the direction of rotation of the sieve apron. The suction opening or openings can have a circular, oval, elliptical or rectangular shape. In particular, by arranging different shapes of the suction openings, for example first an inclined suction slit, followed by a sequence of one transverse and two circular suction slits, a very good compression and twisting of the fiber composite can be generated.

It also has advantages if the suction channel is connected to a suction source. The suction source ensures that the suction channel is sufficiently aspirated to keep the fibers on the fiber collection surface and also to allow the fibers to move transversely to their longitudinal axis in order to allow the fiber assembly to be compressed. In addition, the suction must not be so strong that it affects the detachment of the fibers from the opening roller.

Furthermore, it is advantageous if a dirt separation opening is arranged in the housing of the opening roller between the fiber feed opening and the fiber outlet opening. This achieves a cleaning of the supplied fiber mass from, for example, shell particles and dirt.

There are also advantages if a spinning device, in particular a ring spinning device, an air spinning device, a friction spinning device or a pot spinning device, is arranged downstream of the fiber collection surface. The device according to the invention can be used in all spinning devices which produce a yarn starting from a coherent fiber composite.

In the present invention, the fiber detachment does not take place through active suction of the opening roller, but through the attached knock-off edge, including the cover through the fiber feed channel. The fibers are detached by the centrifugal force of the fast-rotating opening roller acting on the fibers, by a back pressure of air caused by the knock-off edge and by which the fibers are detached from the opening roller, as well as by the direct mechanical contact at the knock-off edge, by which the fibers turn over and reach the fiber collection surface.

It was found that active suction of the fiber feed channel leads to fiber compression. According to the invention, the fiber feed channel is not actively suctioned, as a result of which the fibers are deposited parallel and in a stretched form on the lower surface, namely the fiber collection surface. As a result, the fibers are deposited in a particularly advantageous manner for further processing by a yarn-forming device. By narrowing the fiber feed channel, the fibers are transported through the fiber feed channel by the air flow generated by the opening roller and then reach the zone of the suctioned sieve apron of the fiber collection surface. However, this vacuumed sieve apron has no influence on the fiber detachment from the opening roller. It serves to tie in the fibers so that the resulting roving is suitable for the subsequent spinning process.

By depositing the fibers with high orientation and the possibility of further processing the compacted fiber strand, new yarn qualities can be achieved when processing materials with a high proportion of short fibers. Spinning principles, such as ring or air jet or roving spinning, which use drafting equipment to prepare the fiber material for consolidation, can now be combined with the advantages of a pulping process, for example the removal of dirt from the supplied fiber mass, as in rotor spinning.

The entire production chain can be shortened and there is the possibility of using inferior material for processing. Furthermore, any common spinning process can be used after fiber separation, which guarantees a high level of flexibility and allows cost savings.

The method and the device are designed according to the above description, it being possible for the features mentioned to be present individually or in any combination.

Figur 1

eine Seitenansicht einer erfindungsgemäßen Vorrichtung mit einer Luftspinnvorrichtung,

Figur 2

eine Draufsicht auf die Vorrichtung gemäß Figur 1,

Figur 3

eine Seitenansicht der erfindungsgemäßen Vorrichtung im Bereich eines Faserspeisekanals und

Figur 4

eine Seitenansicht einer erfindungsgemäßen Vorrichtung mit einer Ringspinnvorrichtung.

Further advantages of the invention are described in the following exemplary embodiments. It shows:

figure 1

a side view of a device according to the invention with an air spinning device,

figure 2

a plan view of the device according to FIG figure 1 ,

figure 3

a side view of the device according to the invention in the area of a fiber feed channel and

figure 4

a side view of a device according to the invention with a ring spinning device.

In the following description of the alternative exemplary embodiments illustrated in the figures, the same reference symbols are used for features which are identical and/or at least comparable in their design and/or mode of operation to the exemplary embodiments described above. If these are not explained again in detail, their design and/or mode of action corresponds to the design and mode of action of the features already described above. For reasons of clarity, it may be the case that not all of the same parts are provided with reference symbols, but are drawn in the same way.

figure 1 shows a side view of a device according to the invention with an air spinning device 1. In order to be able to spin fibers 2 in the air spinning device 1, they must be parallelized and compressed. For this purpose, the fibers 2 in a fiber mass 3, for example a so-called draw frame sliver or card sliver, are fed to a faster rotating opening roller 5 by means of a rotating feed roller 4. The opening roller 5 is arranged in an opening roller housing 6 . The fiber mass 3 is introduced into the region of the opening roller 5 by the rotation of the feed roller 4 and the opening roller 5 and the fibers 2 of the fiber mass 3 are separated by teeth which are arranged on the circumference of the opening roller 5 . Dirt particles 7 which are in the fiber mass 3 are separated at a dirt separation opening 8 . The fibers 2 themselves stick to the circumference of the rotating opening roller 5 and are accelerated. The feed roller 4 is arranged at a fiber feed opening 9 of the opening roller housing 6 .

After the fibers 2 have reached a certain speed, they become detached from the rotating opening roller 5 in the area of a fiber outlet opening 10 of the opening roller housing 6 due to the acting centrifugal force. The fibers 2 enter a fiber feed channel 11 and emerge from the fiber feed channel 11 in an opening 12 of the fiber feed channel 11 . The fibers 2 then meet a perforated and air-permeable screen apron 13, which is moved from the mouth 12 to a take-off roller 14. The sieve apron 13 is driven, is deflected by means of deflection rollers 15 and thus leads to a continuous transport of the fibers 2 on the sieve apron 13. The fibers 2 accumulated on the sieve apron 13 to form a fiber composite 29 are removed by means of the take-off roller 14, which is pressed against one of the deflection rollers 15 presses, as a roving 28 deducted from the Sieveriemchen 13 and the air spinning device 1 supplied. There, the fibers 2 are spun into a thread 16 and drawn off from the air spinning device 1 by means of a pair of delivery rollers 17 . The thread 16 is finally wound onto a cross-wound bobbin 18 .

Most of the fibers 2 which leave the opening roller 5 from the opening roller 5 by means of centrifugal force in the fiber outlet opening 10 are deposited on a fiber guide surface 19 before they reach the screen apron 13 . As a result of the fibers 2 being deposited on the fiber guide surface 19, the fibers 2 are stretched and aligned largely parallel to one another.

Fibers 2 which could not be completely detached from the opening roller 5 in the fiber outlet opening 10 are prevented from further circulation with the opening roller 5 at a knock-off edge 20 . The fibers 2 remain hanging on the knock-off edge 20 and are then laid onto the fiber guide surface 19 and tightened, possibly with a rollover of about 180° in the manner of a somersault. Finally they are released from the opening roller 5 with their residual energy and moved to the sieve belt 13 .

A fiber collection surface 23 is provided on the sieve apron 13, on which the fibers 2 come to lie and are transported from the mouth 12 of the fiber feed channel 11 in the direction of the draw-off roller 14. On the fiber collection surface 20, the fibers 2 are ordered, i. H. stored parallel and stretched and, if necessary, also compressed. In order for the fibers 2 to remain securely on the sieve strap 13, which has a perforation and is therefore air-permeable, underneath the sieve strap 13, d. H. on the opposite side of the screen apron 13, on which the fibers 2 rest, a suction channel 21 is arranged, which is connected to a suction source, not shown. The sieve apron 13 is designed to be air-permeable, so that the suction channel 21 provided with suction openings generates negative pressure on the surface of the sieve apron 13 according to the indicated arrows and the fibers 2 thus adhere to the surface of the sieve apron 13 .

So that the fibers 2, which leave the opening roller 5 in the area of the fiber outlet opening 10, are not adversely affected by the suction of the sieve apron 13 through the suction channel 21, the mouth 12 is designed in such a way that it is not suctioned. The orifice 12 is therefore not in the immediate vicinity and effect of the suction through the suction channel 21. The fibers 2 located in the fiber feed channel 11 are thus detached from the opening roller 5 without the effect of negative pressure. The orifice 12 is therefore sized and positioned so that no vacuum is created on the fiber collection surface 12 is present until it can act into the fiber feed channel 11 . This ensures that the fibers 2 can be detached from the opening roller 5 in a stretched and largely parallel manner and reach the fiber collection surface 20 .

So that the flow speed of the air, which is transported through the opening roller 5 and also leaves the opening roller 5 or the opening roller housing 6 at the fiber outlet opening 10, increases along the fiber feed channel 11, the feed channel 11 is designed to converge. According to the present exemplary embodiment, opposite the fiber guide surface 19 is a cover surface 22 which is inclined in relation to the fiber guide surface 19 and thus reduces the cross section of the fiber feed channel 11 . The opening 12 accordingly has a smaller opening cross section than the fiber outlet opening 10. The fibers 2 are additionally tightened and parallelized by the increased flow rate.

figure 2 shows a plan view of the device according to FIG figure 1 . Here, too, the opening roller housing 6 is shown in section. The opening roller 5 is arranged in the opening roller housing 6 . The opening roller 5 has a sawtooth wire 25 running spirally on the circumference of the opening roller 5 . The sawtooth wire 25 ensures that the fibers 2 are caught and accelerated in the area of the fiber feed opening 9 . As soon as the fibers 2 have a speed that allows them to leave the opening roller 5 due to the centrifugal force, the fibers 2 enter the fiber feed channel 11. Fibers 2 that have not yet separated in the fiber feed channel 11 are braked at the knock-off edge 20 and roll over in the area of the fiber guide surface 19. From there they are fed to the moving sieve apron 13 and deposited there.

The fiber feed channel 11 has laterally arranged side surfaces 26 which are parallel to one another in the present exemplary embodiment. In other exemplary embodiments, however, they can also converge conically and additionally reduce the cross section of the fiber feed channel 11 . Depending on the embodiment of the invention, one or both side surfaces 26 can also be dispensed with, as a result of which the fiber feed channel 11 is open at the side.

Suction slots 27a, 27b and 27c of the suction channel 21 are arranged below the fiber collecting surface 23 of the sieve apron 13 . The suction slit 27a is slit-shaped and designed obliquely to the transport direction of the sieve apron 21, so that the fibers 2 collected at the suction slit 27a are compressed and moved towards the end of the suction slit 27a. As a result, the fibers 2, which lie on the sieve apron 13 in the area of the suction slot 27a, are laid ever closer together. A row of further suction slots 27b and 27c follows at the end of the suction slot 27a in the transport direction of the sieve apron 13 . The suction slots 27b are rectangular with rounded end faces. You have an elongated extension transverse to the direction of transport. In this way, fibers 2 or fiber ends that are located at the edge of the fiber assembly are caught and further compressed in the following. Two round suction slots 27c are arranged between the elongated suction slots 27b. The fibers 2 are held close together with these round suction slots 27c, so that they form a roving 28 in the area of the draw-off roller 14. The roving 28 has a slight twist and can finally enter the air spinning device 1 and is spun into a thread 16 there. The thread 16 is fed to the cross-wound bobbin 18 via the pair of delivery rollers 17 . The suction slots 27a, 27b and 27c can extend obliquely and/or transversely to the transport direction and/or have a circular, oval, elliptical or rectangular shape.

In figure 3 a side view of the device according to the invention in the area of the fiber feed channel 11 is shown in section. It can be seen from this that the top surface 22 is designed to be inclined in relation to the fiber guide surface 19 . As a result, the cross section of the fiber feed channel 11 is reduced from the fiber outlet opening 10 to the mouth 12 . The mouth 12 has a distance A of at least 3 mm, preferably at least 5 mm.

In order to enable the transition of the fibers 2 from the fiber guide surface 19 to the fiber collection surface 23 as well as possible, i. H. Without destroying the parallel and stretched position of the fibers 2, an angle α is provided between the fiber guiding surface 19 and the fiber collecting surface 23. The angle α is between +/-30°. The size of the angle α essentially depends on the properties of the fibers 2 to be spun and the speed of the opening roller 5 .

A kink angle β is arranged on the fiber guide surface 19 . The fiber guide surface 19 is bent accordingly. The kink angle β is between +/-30°. This means that the fibers that are stopped at the knock-off edge 20 and roll over to the fiber-guiding surface 19 can be deposited more evenly and stretched out on the fiber-guiding surface 19 .

In figure 4 a side view of a further device according to the invention with a ring spinning device 30 is shown. Instead of a sieve apron 13, a sieve roller 13' is designed as a fiber collection surface 23'. The screen roller 13' is vacuumed on part of its circumference by means of the suction channel 21'. The fibers 2 are compressed in the same way as in the previous exemplary embodiment and leave the fiber collection surface 23' as a roving 28 in the area of the draw-off roller 14. The thread 16 is then spun from this roving 28 in the ring spinning device 30 and wound onto a cop 31 . As an alternative to this ring spinning device 30, there are others Spinning devices such as a pot spinning device or a friction spinning device are possible.

The present invention is not limited to the illustrated and described embodiments. Modifications within the scope of the patent claims are just as possible as a combination of the features, even if they are shown and described in different exemplary embodiments.

Reference List

1

air spinning device

2

fibers

3

fiber mass

4

food roller

5

opening roller

6

opening roller housing

7

dirt particles

8th

dirt evacuation opening

9

fiber feed port

10

fiber exit port

11

fiber feeding channel

12

mouth

13

sieve straps

14

pull-off roller

15

deflection roller

16

thread

17

pair of delivery rollers

18

cone

19

fiber guide surface

20

tee edge

21

suction channel

22

top surface

23

fiber collection surface

25

sawtooth wire

26

side faces

27

suction slot

28

fuse

29

fiber composite

30

ring spinning device

31

cop

A

Distance

a

angle

β

kink angle

Claims (15)

Process for producing a textile fiber composite (29), wherein a fiber mass (3) is separated into individual fibers (2) by means of an opening roller (5) integrated in a housing (6) and the fibers (2) leave the housing (6) through a fiber outlet opening (10) by be detached from the opening roller (5) at a knock-off edge (20) of the fiber outlet opening (10) and enter a fiber feed channel (11), wherein the fiber feed channel (11) is oriented towards a fiber collection surface (23) and has an orifice (12), and the fibers (2) are then fed to the circumferential, perforated, vacuumed fiber collection surface (23), deposited there, compacted and transported away, characterized in that no negative pressure is applied to the mouth (12) of the fiber feed channel (11) and the fibers (2) are thereby detached from the opening roller (5) without negative pressure and then onto a fiber guide surface (19) of the fiber feed channel (11) and onto the fiber collecting surface (23 ) and get stretched and oriented. Method according to the preceding claim, characterized in that the fibers (2) are detached from the opening roller (5) by the centrifugal force acting on the fibers (2). Method according to one or more of the preceding claims, characterized in that at least some of the fibers (2) roll over at the knock-off edge (20). Method according to one or more of the preceding claims, characterized in that an air speed in the fiber feed channel (11) increases towards the mouth (12). Method according to one or more of the preceding claims, characterized in that the fibers (2) are twisted together during and/or after being deposited on the fiber collecting surface (23). Method according to one or more of the preceding claims, characterized in that the fibers (2) are spun into a thread (16) after being transported away from the fiber collecting surface (23). Device for producing a textile fiber composite (29), with an opening roller (5) separating a fiber mass (3) into individual fibers (2) and with a circumferential, perforated, suctioned fiber collection surface (23) which is arranged above a suction channel (21) with at least one suction opening and wherein the opening roller (5) is arranged in a housing (6) and the housing (6) has a fiber feed opening (9) and a fiber outlet opening (10), A knock-off edge (20) and a fiber feed channel (11) are arranged on the fiber outlet opening (10) of the opening roller housing (6), the fiber feed channel (11) being aligned towards the fiber collecting surface (23) and having an orifice (12) and a fiber guide surface (19) of the fiber feed channel (11) adjoins the knock-off edge (20) and the suctioned fiber collection surface (23) is arranged following the fiber guide surface (19) and opposite the fiber guide surface (19) a cover surface (22) of the fiber feed channel (11 ) is arranged and the ends of the fiber guide surface (19) and the top surface (22) facing away from the opening roller (5) form the mouth (12) of the fiber feed channel (11), characterized in that the end of the cover surface (22) facing away from the opening roller (5) from the fiber collection surface (23) at a distance (A), so that the mouth (12) of the fiber feed channel (11) is free of negative pressure. Device according to the preceding claim, characterized in that the fiber guiding surface (19) and the fiber collecting surface (23) form an angle (a) of between +/- 30° and/or that the fiber guiding surface (19) has a kink angle (β) of between +/- - 30°. Device according to one or more of the preceding claims, characterized in that the mouth (12) of the fiber feed channel (11) is delimited by at least one side surface (26) between the fiber guide surface (19) and the top surface (22) and/or that the fiber outlet opening (10) has a larger cross section than the mouth (12) of the fiber feed channel (11). Device according to one or more of the preceding claims, characterized in that the distance (A) of the end of the cover surface (22) facing away from the opening roller (5) from the fiber collection surface (23) is more than 3 mm, preferably more than 5 mm. Device according to one or more of the preceding claims, characterized in that the fiber collecting surface (23) which is sucked off is a sieve apron (13) or a sieve roller (13'). Device according to one or more of the preceding claims, characterized in that the suctioned fiber collection surface (23) has a fiber compression device, in particular with a row of suction slots (27a, 27b, 27c). Device according to one or more of the preceding claims, characterized in that the suction opening, preferably several suction openings, of the suction channel (21) extends to the direction of circulation of the Sieve apron (13) or the sieve roller (13') extend obliquely and/or transversely and/or have a circular, oval, elliptical or rectangular shape. Device according to one or more of the preceding claims, characterized in that a dirt separation opening (8) is arranged in the housing (6) of the opening roller (5) between the fiber feed opening (9) and the fiber outlet opening (10). Device according to one or more of the preceding claims, characterized in that a spinning device, in particular a ring spinning device (30), an air spinning device, a friction spinning device or a pot spinning device is arranged following the fiber collecting surface (23).

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