EP1654407B1 - Nonwoven guiding device for a textile machine, and associated textile machine - Google Patents

Description

The invention relates to a nonwoven guide device for a textile machine with a drafting system for compressing a fiber web leaving the drafting system in expanded form with an inlet section and a subsequent outlet section, which has a cross section narrowed with respect to the inlet section. Likewise, the invention relates to a textile machine with such a nonwoven guide device.

Guiding devices of the type mentioned above are known in particular from cards, tracks and combers ago. In the known route RSB-D 35 from Rieter, for example, the drafting system is followed by a non-woven width extending nonwoven funnel which has a concavely curved baffle at its lowest point a funnel mouth with a funnel channel is arranged. This fleece funnel is sometimes called a fleece guide nozzle. In the nonwoven funnel, a nonwoven nozzle insert designed to be elongated in the nonwoven transport direction can be inserted, wherein the nonwoven leaves the fleece funnel through its exit section and passes through the nonwoven nozzle insert to form a sliver funnel. The sliver funnels on the output side into a gap formed by downstream calender rolls, wherein the nonwoven fabric or the sliver formed from the nonwoven fabric sliver is pressed between the calender rolls and withdrawn from the sliver funnel.

A disadvantage of the known construction that fibers lying further out in the fleece do not enter the fleece guide nozzle directly after leaving the drafting system, but collide with the impact surface of the fleece guide at high speed, are folded therein and deflected to the fleece nozzle insert. This abrupt impact on the one hand disturbs the previously highly precisely distorted fiber fleece, on the other hand, the fibers lying on the outside in the fleece travel a greater distance than the inner ones, which are transported directly to the fleece nozzle insert. As a result, the fibers of the nonwoven fabric again, but this time undesirable, shifted against each other. A consequence is also that the parallelization of the fibers is deteriorated, especially in combed slivers.

It is an object of the present invention, a nonwoven guide device of the type mentioned in such a way that a gentle fleece transport from the output of the drafting to the trigger devices (for example, calender rolls) possible without generating band disturbances within the web is possible. Hereby disclosed GB 660,371 A a device according to the preamble of claim 1.

This object is achieved by a nonwoven guide device according to claim 1. A textile machine according to the invention with a drafting system is characterized by a corresponding nonwoven guiding device.

In the nonwoven guide device according to the invention, outer fibers are guided more directly or with fewer detours to the exit section than further inward ones. In this case, all fibers of the nonwoven fabric are preferably conducted from at least one guide surface to the outlet section, so that the fibers lying inside are also guided, and not directly. The inner fibers are thus not transported by the shortest route from the output rollers of the drafting system or a Umlenkoberwalze to the outlet section and further into a fleece nozzle section or a belt hopper.

Overall, therefore, the distance covered by the fibers lying further inside the fleece is artificially prolonged, so that an offset of the fibers of the fiber fleece between drafting equipment outlet and the calender rolls is kept low or even completely avoided. Accordingly, it is expedient to guide the outermost fibers almost directly or in a slight arc to the exit section, while the central fibers located in the center advantageously cover an arcuate path.

In a horizontal or inclined drafting the fleece running direction is inclined when leaving the drafting system with respect to the axis of the downstream belt hopper, while the belt hopper is oriented vertically. The at least one guide surface is formed according to the invention with a concave profile between the inlet section and outlet section, so that it realizes the corresponding path deflection of the web and also completely avoids the fiber offset over the web width at least partially and in a particularly preferred case.

By means of the invention, the high distortion quality of the nonwoven at the exit of the drafting system and possibly also the parallelization of the fibers of the nonwoven leaving the drafting system are preserved. Overall, a sliver of higher uniformity results than in the prior art.

According to a preferred embodiment, the at least one guide surface is formed such that the paths of all fibers from the outlet of the drafting to the exit section are substantially equal in length, so that no displacement of the fibers occurs after leaving the drafting system. To achieve this state, mathematical modeling has been performed. As a suitable shape has been found that the guide surface may be formed similar to the inner surface of a shell or a baseball glove to meet the requirement of equally long distances. The guide surface extends advantageously following the output roller of the drafting system over the entire web width. After an optional deflection section of the guide surface in order to deflect the web from the exit of the drafting system in the direction of the calender rolls, the lateral sections of the guide surface lead essentially straight to the exit section. In contrast, the corresponding surface section for the inner fibers is concave or bulbous, with the largest curvature being provided for the central or central fibers.

Advantageously, the nonwoven guide device is arranged or arranged immediately behind the last drafting roller or the last drafting roller pair, so that an immediate guidance of the fibers after leaving the drafting system can be achieved.

If the at least one guide surface is formed substantially continuously or completely over the area between the inlet section and the outlet section, further, a continuous guidance of the fibers can be realized.

A gentle fiber guide is also beneficial if the fibers are guided substantially tangentially to the guide surface in the region of the inlet section and then - depending on their position with respect to the fleece width - are directed to the outlet section. Abrupt deflections of the fibers and thus a disturbance of the sensitive, precisely warped nonwoven fabric are avoided.

Preferably, the fibers can be guided between at least two guide surfaces, which can be arranged opposite to one another or offset in the nonwoven running direction. In a related embodiment, at least a portion of the web is first on one guide surface and then on the other guide surface along feasible. In a vertically oriented drafting system, for example, in particular the inner fibers of the nonwoven are passed over a curved guide surface and thus deflected out of the way to the belt hopper until they are guided by a further downstream guide surface on its original path to the belt hopper.

In a comparison with the usually vertical belt funnel axis inclined, for example, horizontal drafting, guide surfaces are preferably such formed and arranged so that at least the inner fibers are guided at faster delivery speeds substantially along a concave guide surface and at lower delivery speeds substantially along a convex guide surface. At high delivery speeds, for example above 300 m / min, the inner fibers leaving the drafting system are thus guided along the concave surface. By contrast, at lower delivery speeds, for example up to 300 m / min, the inner fibers are not conveyed against this concave guide surface but would move more directly to the nonwoven nozzle. Therefore, it is advantageous to deflect these fibers at the mentioned low delivery speeds from the other side. For this case, the inner fibers are preferably guided along the convex guide surface and, in this way, are likewise deflected in accordance with the invention to the exit section.

The inlet section and the outlet section as well as the at least one guide surface are integrally formed as a whole according to an advantageous embodiment. A multi-part design may be useful if more than one guide surface is provided. In this case, for example, the individual parts of the nonwoven guide device can be separated from one another such that e.g. the Einfädelprozeß for a fleece end is facilitated.

According to an advantageous embodiment, it is provided that the at least one guide surface can be changed in its position. Thus, for example, at a low delivery speed, the fleece can run over said convex guide surface, which can then, for example, be swiveled away at higher speeds. This measure can help prevent the formation of air vortices or clogging of the device with fiber material. Also, a simple threading of the web end can be realized when the Einfädelungsquerschnitt is briefly increased by changing the position of the at least one guide surface.

Preferably, such a position change is realized by a pivot mechanism. Also, advantageously, a control device be provided, which outputs an actuating instruction for the respective positioning of the guide surface depending on the delivery speed.

Alternatively or additionally, the nonwoven guide device is designed such that all or part of it in a belt jam and / or winding formation on one of the output rollers and / or for easier access to the nonwoven guide device downstream elements, such as a nonwoven or a belt hopper, for Purpose of easier threading of an operating position in a maintenance position is pivoted. Here, if necessary, further elements for web formation or band formation can be given away, for example nonwoven nozzle elements or a band funnel.

Furthermore, openings may be provided, which can be used in particular for the discharge and / or supply of air. For example, these openings may be made very small and sucked in order to realize a uniform contact of the fibers along the guide surface. On the other hand, openings can be used to impart a component of movement to the fibers in the direction of the exit section. It may also be provided that openings for air supply or in another section openings for air discharge are realized in one section. Openings can still be used to prevent the formation of air vortices within the web guiding device.

Advantageously, the nonwoven guiding device encloses the fibers at least in regions more than 180 ° and in a further advantageous embodiment at least partially completely. Especially in the transition region from the outlet section to a subsequent nonwoven nozzle or a subsequent belt hopper, it is advisable that the nonwoven guide device is arranged on all sides around the compacted fiber fleece.

The nonwoven guide device according to the invention is advantageously designed as a funnel or comprises such. A funnel is in accordance with the above-stated responsible for compressing the emerging from the drafting fiber web and usually supply a downstream nonwoven nozzle and / or a belt hopper.

Such a fleece nozzle, which is optionally also designed as an insert, and / or a downstream band hopper are summarized according to a further advantageous embodiment in the nonwoven guide device according to the invention.

Preferably, the at least one guide surface is formed fiber-free or slidable in order to avoid fiber deposits and to ensure undisturbed, uniform operation. It is therefore preferred low-friction materials, such as an enamel coating or polished stainless steel, used for the guide surface (s). Also, the corresponding material is preferably formed abrasion resistant or wear-free.

The invention also includes a textile machine with a drafting system comprising a nonwoven guide device according to the foregoing. Due to the leadership of the fibers according to the invention can also be dispensed with a Umlenkoberwalze, as found in most common routes use. The deflection can be completely taken over by the at least one guide surface according to the invention.

Advantageous developments of the invention are characterized the features of the subclaims.

Figur 1

eine schematische, teilweise geschnittene Seitenansicht eines Streckwerks mit nachfolgender Vliesführungsvorrichtung;

Figur 2

eine perspektivische Ansicht auf die Vliesführungsvorrichtung gemäß der Figur 1;

Figur 3-5

ein Teil der erfindungsgemäßen Vliesführungsvorrichtung gemäß der Figuren 1 und 2 in perspektivischer Ansicht, Vorder- und Seitenansicht;

Figur 6

eine schematische Seitenansicht eines Streckwerks mit nachfolgender Vliesführungsvorrichtung gemäß einer zweiten Ausführungsform;

Figur 7

eine perspektivische Ansicht auf einen Teil der Vliesführungsvorrichtung gemäß der Figur 6;

Figur 8

eine Vorderansicht eines Teils einer Vliesführungsvorrichtung gemäß einer dritten Ausführungsform mit Öffnungen in der Führungsfläche;

Figur 9

eine perspektivische Ansicht einer vierten Ausführungsform einer Vliesführungsvorrichtung mit vorgeschaltetem vertikalen Streckwerk;

Figur 10

eine mittig geschnittene Seitenansicht der Vliesführungsvorrichtung gemäß der Figur 9;

Figur 11

eine mittig geschnittene Seitenansicht einer Vliesführungsvorrichtung gemäß einer fünften Ausführungsform;

Figur 12

eine Aufsicht auf die Vliesführungsvorrichtung gemäß der Figur 11;

Figur 13

eine perspektivische Ansicht einer sechsten Ausführungsform einer Vliesführungsvorrichtung in Betriebsstellung, und

Figur 14

die Vliesführungsvorrichtung gemäß der Figur 13 in verschwenkter Stellung.

In the following the invention will be explained in more detail with reference to FIGS. Show it:

FIG. 1

a schematic, partially sectioned side view of a drafting system with subsequent web guiding device;

FIG. 2

a perspective view of the nonwoven guide device according to the FIG. 1 ;

Figure 3-5

a part of the nonwoven guide device according to the invention according to the Figures 1 and 2 in perspective view, front and side view;

FIG. 6

a schematic side view of a drafting system with subsequent nonwoven guide device according to a second embodiment;

FIG. 7

a perspective view of a part of the nonwoven guide device according to the FIG. 6 ;

FIG. 8

a front view of a portion of a nonwoven guide device according to a third embodiment with openings in the guide surface;

FIG. 9

a perspective view of a fourth embodiment of a nonwoven guide device with upstream vertical drafting;

FIG. 10

a centrally sectioned side view of the nonwoven guide device according to the FIG. 9 ;

FIG. 11

a centrally sectioned side view of a nonwoven guide device according to a fifth embodiment;

FIG. 12

a plan view of the nonwoven guide device according to the FIG. 11 ;

FIG. 13

a perspective view of a sixth embodiment of a nonwoven guide device in the operating position, and

FIG. 14

the nonwoven guide device according to the FIG. 13 in a pivoted position.

In the FIG. 1 is shown in a schematic, sectional side view of a horizontal drafting 1 with successive pairs of rollers. An input roller pair with an input lower roller 2 and an upper input roller 5 is followed by a middle roller pair with a middle lower roller 3 and middle upper roller 6. These two pairs of rollers form the so-called Vorverzugsfeld, which adjoins the main drafting zone, which consists of said middle roller pair and a pair of output rollers with an output lower roller 4th and an output top roll 7 consists. In the main drafting field, a pressure rod 8 is arranged, which serves to guide unclamped, so-called floating fibers in the main drafting field. The in the drafting 1 to be forgiven nonwoven fabric is marked with the reference symbol V. The drafting system 1, one or more slivers B can be supplied in spread out form. The drafting system 1 may be part of a card, a track or a combing machine. It is irrelevant for the invention, whether the drafting system 1 is adjustable.

Downstream of the drafting system 1 is a nonwoven guide device 20 according to the invention according to a first embodiment, which in a perspective view in FIG. 2 is shown. This web guide device 20 is formed in two parts and consists on the one hand of a funnel 21 and a bale-shaped body 31, wherein the body 31 projects centrally into the hopper 21. The funnel 21, in the FIGS. 3 to 5 is shown in more detail, is designed to be drafting towards 1 open and has on both sides ascending edges 27a, which are connected to a substantially straight, upper edge portion 27b. At the lower edge, the funnel 21 has a recess 27c, through which a doubly curved holder 35 extends for the body 31. Overall results in a squat appearance of the funnel 21, which therefore has a wide inlet portion 22 for receiving the exiting from the drafting 1 nonwoven fabric V. At the other end of the funnel 21 is an outlet section 24, which is formed circumferentially closed in the illustrated embodiment and has a circular cross-section. It is also possible to choose a different cross-sectional shape, for example an elliptical one.

In particular, the side view of FIG. 5 It can be seen that the rear wall of the funnel 21 is formed to the outlet portion 24 inwardly (concave) extending. In an alternative, the rear wall may also run out perpendicularly or outwardly (convexly), as a result of which turbulence in the outlet section 24 may possibly be reduced, which could produce a twist in the fiber fleece.

The inlet section 22 is connected to the outlet section 24 via a continuous guide surface 23 of the funnel 21. The guide surface 23 is such formed so that over the width of the inlet portion 22 into the hopper 21 reaching fibers on their way to the exit section 24 cover substantially equal distances. The fibers of the nonwoven fabric V are - provided sufficiently high delivery speeds - along the inner surface and the guide surface 23 of the hopper 21 to the outlet section 24 out (s., Dashed line in FIG. 1 ). The formation of the guide surface 23 is therefore such that the fibers of the non-woven fabric V lying further inwards are deflected or deflected more strongly than the fibers lying further outside. While the outermost fibers pass almost directly from the inlet section 22 from the outside inwards to the outlet section 24, a curved path is imposed on the central or internal fibers. As a result, those fibers that pass the entrance section 22 over the width of the web at the same time ideally also enter the exit section 24 at the same times.

The preceding statements apply to the case that the web V at a relatively high speed leaves the drafting system 1 and is therefore conveyed to the guide surface 23, wherein it first enters the hopper 21 substantially parallel to this guide surface in the region of the inlet portion 22 and then is deflected gently to the outlet section 24. At lower delivery speeds, the velocity impulse given to the nonwoven V is not sufficient to convey it to the guide surface 23. Rather, in this case, the nonwoven V slides along the convex guide surface 33 of the body 31 opposite the guide surface 23 (see dotted line in FIG FIG. 1 ) to the exit section 24.

The holder 35 for the crowned body 31 has at its foot a slot 36 for receiving a screw, not shown, by means of which the relative position of the body 31 to the hopper 21 is adjustable (see double arrow f ₁ in FIG. 1 ). The thus adjustable penetration depth of the body 31 into the hopper 21 determines when the fleece V is supported by the guide surface 33.

The hopper 21 has the outlet portion 24 below a widened foot 25 which is mounted on the underside of a plate 9, wherein the screw o. The like. Are not shown in detail. On both sides of the plate 9 are side flanges 10th attached to the undersides recesses 11 are provided. These recesses 11 may each receive a non-illustrated, fixed axis of a carrier unit arranged thereunder, so that the plate 9 is pivotable, in particular in a belt jam in the web guiding device 20. The pivoting direction is by the double arrows f ₂ in the Figures 1 and 2 indicated.

At the bottom of the foot 25 of the funnel 21, four exhaust ducts 26 are provided which extend horizontally outwards on all four sides and which dissipate the air emerging from the fleece during the fiber compression (indicated by the arrows f ₃ in FIG FIGS. 1, 2 . 3 ). Air can continue to escape via an opening 26a between the recess 27c and the holder 35 from the continuously compressed nonwoven fabric V (see arrow f ₄ in FIGS FIGS. 1, 2 ).

Below the plate 9, a fleece nozzle 12 is arranged in alignment with the outlet section 24, which leads the compacted nonwoven V to a belt hopper, not shown. Alternatively, a discharge funnel directly adjoins the outlet section 24.

In FIG. 6 is a comparison with the horizontal in fleece running direction downwardly inclined drafting 1 shown, which otherwise the drafting 1 of FIG. 1 like. This construction implies that the nonwoven guide device 120 has a different geometry than that according to the FIGS. 1 to 5 , The funnel 121 as part of the nonwoven guide device 120, which in a perspective view in FIG. 7 is shown in more detail, is curved to a lesser extent than the funnel 21 in the FIGS. 1 to 5 , otherwise very similar to the basic structure. The inlet section 122, which extends over the width of the fleece, tapers almost linearly toward the outlet section 124 on both sides, while towards the center the guide surface 123 is increasingly curved. In the FIG. 6 In addition, a body convexly curved convexly toward the fleece V and curved in cross-section and flat, which projects into the funnel 121 and serves to guide the fibers at low delivery speeds (for example below 300 m / min) is optionally provided. If the body 131 is absent, the funnel 121 is the only element of the nonwoven guide device 120.

Downstream of the nonwoven guide device 120 is a nonwoven nozzle 12 with a subsequent belt funnel 14. Furthermore, openings 13 are provided laterally, obliquely downward toward the center of the belt web, through which air can escape from the compressed web V. Other possibilities for air escape - at the entrance of the fleece nozzle 12 and already upstream in the web guiding device 120 - are indicated by arrows. In the belt hopper 14 (and upstream of this) may continue to be present in a known manner, not shown, which can be acted upon with compressed air to give the web V a pulse in the downstream direction. This measure supports in a known manner the threading process of a Vliesendes. In the FIG. 6 a pair of calender rolls 15, 16 are connected downstream of the sliver funnel 14, which are known to be used to strip the web V by the web guiding device 120 and to transport the resulting strip to a band channel and finally to a sliver can.

In the more detailed in FIG. 7 shown, in the outlet region circumferentially closed funnel 121 are on the guide surface 123 in fleece running horizontally spaced fictitious lines 128 shown. These lines 128 are all substantially the same length and symbolize the distance covered by the fibers, regardless of their position over the width of the fleece, which is essentially the same length.

In the slightly modified embodiment of the funnel 121 which is open at the circumference in the exit region according to FIG FIG. 8 (Third embodiment), openings 129 are provided in the guide surface 123, which - similar to the exhaust air ducts 26 according to the first embodiment - are formed for the discharge of air from the nonwoven fabric V. Alternatively or - as needed - in addition compressed air can be introduced through these openings, which support the Einfädelprozeß a Vliesendes.

In the FIGS. 9 and 10 is a non-inventive embodiment of the nonwoven guide device is shown. This finds particular application in vertically oriented drafting, wherein in the FIG. 9 only the output roller pair 4, 7 is shown. This roll pair 4, 7 is directly downstream of the - non-woven web guiding device 220, which is formed here in one piece and a has an elongated, slightly tapered shape in the fleece running direction. Opposite the rolls 4, 7 the fleece guiding device 220 has a widened entry section 222 in order to be able to receive the fleece V in its entire width. At the other end a round in cross-section outlet portion 224 is provided, the - similar to the construction according to the FIG. 6 - A nonwoven nozzle 12, a belt hopper 14 and calender rollers 15, 16 are arranged downstream.

The perspective view of FIG. 9 as well as the longitudinal and central cut side view of FIG. 10 It can be seen that the nonwoven guide device 220 has on a longitudinal wall an inwardly curved guide surface 233 against which inwardly located fibers of the nonwoven fabric V soft start to be deflected from its vertical direction (see dotted line in FIG FIG. 10 ). The farther the fibers are on the outside, the less they are deflected transversely to the web level. The outer fibers do not undergo deflection in the direction of the opposite wall, but are guided almost linearly to the outlet section 224 (see dotted line in FIG FIG. 10 ). The area which is available to the fleece in the interior of the fleece guiding device 220 is in the FIGS. 9 and 10 shown dotted (as well as in the FIGS. 11 and 12 ).

In the sectional view according to the FIG. 10 It can be seen that the fibers of the nonwoven lying further inside are first guided on the guide surface 233, which rises directly below the gap of the rollers 4, 7. Subsequently, these fibers reach the opposite wall, which is also formed as a guide surface 223, to then reach the outlet portion 224. Also in this embodiment, the distances traveled by the various fibers of the web V distributed over the fiber width are preferably of the same length from the inlet section 222 to the outlet section 224.

The funnel-shaped nonwoven guide device 220 may be slit longitudinally at one location to facilitate easy threading of a nonwoven end. It must be ensured hereby that the fleece does not get into this slot during operation. Another alternative for assisting threading is a wall section of the nonwoven guide device 220 is foldable or removable.

The fifth embodiment, the nonwoven guide device 320 according to the FIGS. 11 and 12 is formed in two parts. The central fiber deflecting guide surface 333 is part of a body 331 which projects into a funnel 321 and is advantageously adjustable in position. Preferably, the body is designed to be pivotable, in this case about an axis 339 (see double arrow f ₅ ). For threading a nonwoven end of the body 331 is first pivoted outward, pushed the fleece end deep in the hopper 321 and started the machine in slow motion. With successful threading the body 331 can then be pivoted from the maintenance position to its operating position.

The hopper 321 also has a guide surface 323 which directs the center fibers on their last path to the exit section 324 after being previously deflected from the guide surface 333 from their direct path from the entrance section 322 to the exit section 324. The FIG. 12 shows the nonwoven guide device 320 for better understanding in a plan view.

According to the sixth, in the FIGS. 13 and 14 In the embodiment shown, a non-woven guiding device 420 is provided which is similar to that according to FIG Figures 1-5 is trained. However, the following differences exist: The upper edge or the upper edge 427b of the funnel 421, which in the present case is the only element of the web guiding device 420, runs in a straight line. The inlet section 422 defined thereby is bent in the form of a partial cylinder with a small radius, which merges in the fleece running direction into a guide surface 423 with a lower curvature. This curvature is stronger towards the middle of the fleece than at the edge in order to achieve the effect according to the invention. The exit portion 424 is substantially semicircular and therefore open, also to provide easy access to the subsequent elements. The lateral edge portions 427 a run substantially linearly from the curved inlet section 422 to the outlet section 424.

In the region of the outlet section 424, a flange 428 is provided in each case on its two outer sides, on each of which a pivot foot 429 is attached. The two pivoting feet 428 are pivotally mounted on a block 409 about an axis 411, so that funnel 421 from an operating position ( FIG. 13 ) into a maintenance position ( FIG. 14 ) can be brought to thread the free web end, s. Arrows around the axis 411. Even with belt jamming or winding on the output rollers of the funnel 421 pivots from the operating position to its maintenance position, so that easy access to eliminate the fault is present.

How to continue the FIGS. 13 and 14 can be removed, lies the lower edge 427a of the funnel 421 on the block 409 and partially encloses a crater-like opening 430, in which (not shown) a funnel insert and then in the nonwoven running direction then a sliver funnel can be used.

The difference in the pivotability compared to the embodiment according to the Figures 1-5 is that only the funnel 421 is pivoted and not the subsequent elements (eg fleece nozzle insert, sliver funnel).

The embodiments shown in the figures have in common that the fibers of the web V are each guided without abrupt deflections and thus in a gentle manner to the respective outlet section. This also applies to the impact of the fibers on the guide surfaces in the inlet section of the respective nonwoven guide device; In this case, the fibers preferably strike the guide surface almost tangentially or at a very small angle.

In the figures, the respective inlet sections, guide surfaces and outlet sections are each formed in one piece. However, it is also readily possible that, for example, the guide surface forms a single element for itself and can be introduced into the space between the inlet and outlet sections, either fixed there or movably arranged, for example by means of a pivot mechanism.

Claims (30)

1. A web guiding device for a textile machine with a drafting system (1) for the consolidation of a fibre web (V) leaving the said drafting system (1) in an expanded condition, said device having an inlet section (22; 122; 222; 322; 422) and a subsequent outlet section (24; 124; 224; 324; 424), which said outlet section possesses a reduced cross-section as compared to that of the said inlet section (22; 122; 222; 322; 422), wherein at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) is provided between the inlet section (22; 122; 222; 322; 422) and the outlet section (24; 124; 224; 324; 424), which is so designed, that, relative to the transverse direction of the web, the inner fibres, when compared to the outer fibres, are conducted in a path less direct to the outlet section (24; 124; 224; 324; 424) than are the said outer fibres, characterized in that the at least one guide surface (23, 33; 123, 133; 423) is so designed, that the moving direction of the web at the inlet section (22; 122; 422) forms an angle with the moving direction of the web at the outlet section (24; 124; 424) whereas the guide surface (23, 33; 123, 133; 423) shows a concave design between the inlet section (22; 122; 422) and at the outlet section (24; 124; 424) and the web is not only condensed by means of the web guiding device but is also deflected to a following band funnel.
2. A web guiding device according to claim 1, characterized in that the guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) is designed in such a manner, that the entirely outward lying fibres are guided essentially linearly or slightly bowed to the outlet section (24; 124; 224; 324; 424).
3. A web guiding device according to one of the foregoing claims, characterized in that the at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) is so constructed, that the length of the paths of all fibres from the outlet of the drafting system (1) up to the outlet section (24; 124; 224; 324; 424) essentially, are of the same length.
4. A web guiding device according to one of the foregoing claims, characterized in that it can be located directly behind the last draft roller, or respectively behind the last roll-pair (4, 7) of the said drafting system.
5. A web guiding device according to one of the foregoing claims, characterized in that the at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) is located essentially continuously between the inlet section (22; 122; 222; 322; 422) and the outlet section (24; 124; 224; 324; 424).
6. A web guiding device according to one of the foregoing claims, characterized in that the at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) in the area of the inlet section (22; 122; 222; 322; 422) is designed and arranged in a way, that the fibres coming from the drafting system (1) impact nearly tangentially against the guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423).
7. A web guiding device according to one of the foregoing claims, characterized in that the at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) is so designed, that the fibres can be guided without an abrupt deflection to the outlet section (24; 124; 224; 324; 424).
8. A web guiding device according to one of the foregoing claims, characterized in that the fibres can be directed between at least two guide surfaces (23, 33; 123, 133; 223, 233; 323, 333) which are opposite to one another, or are installed offset in the direction of the web flow.
9. A web guiding device according to claim 8, characterized in that at least a portion of the web, preferably the more inward lying fibres, are at first guided along one guide surface (233; 333) and then, along another guide surface (223; 323).
10. A web guiding device according to one of the foregoing claims, characterized in that the guide surfaces (23, 33; 123, 133; 223, 233; 323, 333) are so designed and placed, that the fibres, in a case of more rapid delivery speed are directed essentially along a concave guide surface (23; 123) and in a case of less rapid delivery speed, fibres are directed essentially along a convex guide surface (33; 133).
11. A web guiding device according to one of the foregoing claims, characterized in that the inlet section (22; 122; 222; 322; 422) and the outlet section (24; 124; 224; 324; 424) as well as the at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) are all constructed as one piece.
12. A web guiding device according to one of the foregoing claims, characterized in that the inlet section (22; 122; 222; 322; 422) and the outlet section (24; 124; 224; 324; 424) as well as the at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) are constructed as multicomponents.
13. A web guiding device according to one of the foregoing claims, characterized in that the at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) can be changed in its position.
14. A web guiding device according to one of the foregoing claims, characterized in that at least a portion of the web guiding device (20; 120; 420) is pivotal in a case of a band stoppage or windup and/or for the threading up of the fibre web.
15. A web guiding device according to one of the foregoing claims, characterized in that the said device possesses openings (26, 26a, 129), especially for the release or introduction of air.
16. A web guiding device according to claim 15, characterized in that at least one air release channel (26) is provided in the area of, or proximal to the outlet section (24).
17. A web guiding device according to claim 16, characterized in that at least one air release channel (26) is placed immediately following the outlet section (24).
18. A web guiding device according to one of the claims 15 to 17, characterized in that openings (129) are provided in the at least one guide surface (123).
19. A web guiding device according to one of the foregoing claims, characterized in that the said guide device encompasses the fibres at least area-wise more than 180°, preferably at least at the outlet section (24; 124; 224; 324).
20. A web guiding device according to one of the foregoing claims, characterized in that the said guide device, at least area-wise, completely encompasses the fibres.
21. A web guiding device according to one of the foregoing claims, characterized in that the said guide device encompasses the fibres at least in the area of the outlet section (24; 124; 224; 324).
22. A web guiding device according to one of the foregoing claims, characterized in that the at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) is designed to be free of fibre cohesion.
23. A web guiding device according to one of the foregoing claims, characterized in that the at least one guide surface (23, 33; 123, 133; 223, 233; 323, 333; 423) is designed to be essentially wear resistant.
24. A textile machine with a drafting system, characterized by a web guiding device (20; 120; 220; 320; 420) according to one of the foregoing claims.
25. A textile machine according to claim 24, characterized in that the drafting system (1) is aligned to be horizontal, and in that the outlet section (24; 124; 224; 324; 424) conducts the web (V) vertically downward.
26. A textile machine according to claim 24 or 25, characterized in that the drafting system (1) possesses no deflection roller, especially no upper deflection roller.
27. A textile machine according to one of the claims 24 to 26, characterized in that a band funnel (14) is set behind the web guide device (20; 120; 220; 320; 420).
28. A textile machine according to one of the claims 24 to 27, characterized in that the web guiding device (20; 120; 220; 320; 420) can be pivoted from an operational position into a maintenance position.
29. A textile machine according to claim 28, characterized in that additional elements (12, 14) for web compaction and/or band shaping can be pivoted with the web guiding device (20; 120; 220; 320; 420).
30. A textile machine according to claim 28 or 29, characterized in that the web guiding device (20; 120; 220; 320; 420) connects to the following compaction element (12; 409) essentially in full closure in the operational position.

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