Device for a textile machine comprising a drawing unit, and method for operating a textile machine comprising the drawing unit

Abstract

The invention relates to a device for a textile machine, to a method for operating a textile machine, and to a textile machine. The device has a drawing unit (1) for drawing at least one sliver (2), a nonwoven nozzle (3) which is arranged at the outlet of the drawing unit (1) for combining the drawn slivers (4), and a base frame (5), wherein the nonwoven nozzle (3) is held on the base frame (5) in a stationary manner. The drawing unit (1) has at least one inlet roller pair (14) and an outlet roller pair (18). The inlet roller pair (14) has a lower roller (16) and a pressure roller (17), and the outlet roller pair (18) has a lower roller (20), a pressure roller (21), and a deflecting roller (22). A clamping point (42) is formed between the deflecting roller (22) and the lower roller (20) of the outlet roller pair (18), and an adjustment function is provided for a path (41) between the clamping point (42) and the nonwoven nozzle (3).

Description

[0001] DEVICE FOR A TEXTILE MACHINE WITH A DRAWING SYSTEM AND METHOD FOR OPERATING A TEXTILE MACHINE WITH THE DRAWING SYSTEM

[0002] The present invention relates to a device for a textile machine with a drafting system for drawing at least one fiber sliver and with a nonwoven nozzle arranged at the output of the drafting system for gathering the drawn fiber sliver, as well as to a textile machine and a method for operating a textile machine.

[0003] Such drafting systems are used in a wide variety of textile machines. For example, they are used in combing machines to draw the combed fiber slivers from the individual combing stations together, thereby forming a single fiber sliver. Drafting systems are also used in draw frames for doubling and blending multiple fiber slivers. Another example of the use of drafting systems is in carding machines, where drafting systems are used to even out the fiber slivers formed in the carding machines. The drafting system has, for example, a drafting zone in which the fiber sliver is drawn or drawn. The drafting zone also has, for example, at least two pairs of rollers. The fiber sliver is guided between the rollers of the pairs of rollers.By rotating the two pairs of rollers at different speeds, the fiber sliver is drawn onto a spread fiber sliver located at the exit of the drafting system. Furthermore, the drafting system can be used to combine and draw several individual fiber slivers, thus increasing the homogeneity of the fiber sliver. The fiber sliver leaves the drafting system as a spread fiber sliver, meaning it has a thinner thickness compared to its width.

[0004] A fleece nozzle is located at the exit of the drafting system to gather the fiber sliver. The fleece nozzle is arranged downstream of the drafting system to gather the spread fiber sliver so that a strand-like fiber sliver exits the fleece nozzle. The fleece nozzle has an inlet side at which the spread fiber sliver enters the fleece nozzle. The fleece nozzle also has an outlet side at which the gathered fiber sliver exits the fleece nozzle. When the fiber sliver exits the fleece nozzle, it has a substantially circular cross-section. This allows the fiber sliver to be deposited, for example, in a can.

[0005] In order to achieve trouble-free gathering of the spread fiber sliver in the web nozzle, it is of great importance that the spread fiber sliver hits the inlet side of the web nozzle. The position of the drafting system in relation to the web nozzle is crucial here, apart from the design of the web nozzle itself. The position of the drafting system determines a path between a last clamping point of the last roller pair of the drafting system and the web nozzle. The clamping point is a point between two opposite rollers of a roller pair at which the rollers are closest to each other and thus clamps the fiber sliver. The ideal position of the drafting system in relation to the web nozzle depends, among other things, on the delivery speed of the drafting system and the materials of the fiber sliver(s) passing through the drafting system.Crucial for optimal fiber sliver uniformity and optimal runnability is a fiber impingement zone in the web nozzle. Ideally, the fibers of the spread fiber sliver impinge on the web nozzle in such a way that the lateral web sections fold inward toward the center in a controlled manner, without preventing central web streams from flowing through the web nozzle.

[0006] Improvements have been achieved through geometric adjustments in the drafting system, as disclosed, for example, in DE 10 2015 101 704 A1 or DE 10 2015 106 808 A1. However, the distance between the drafting system and the web nozzle represents a compromise, which can be improved through various structural designs or the arrangement of guide elements in the web nozzle. If the fibers land too close to a nozzle front wall or directly against a wall, controlled fiber flow is disrupted, resulting in blockages in the web nozzle and an interrupted production process. If the fibers land too far in front of the front wall, folding is also disrupted. The uniformity values ​​in the fiber sliver deteriorate significantly, or the sliver breaks.

[0007] DE 10 2018 118 923 A1 discloses a drafting system in which an attempt is made to select the nonwoven nozzle from a multitude of different nonwoven nozzles depending on at least one sliver property of the spread-out fiber sliver. Thus, several different nonwoven nozzles are available, from which the most suitable is chosen so that the quality of the fiber sliver emerging from the nonwoven nozzle is the best or most advantageous. Different geometries, shapes, designs, and / or materials of the nonwoven nozzle can lead to different qualities of the fiber sliver emerging from the nonwoven nozzle, whereby it is advantageous to select the nonwoven nozzle that results in the best quality of the fiber sliver emerging from the nonwoven nozzle. Tuning the nonwoven nozzle can thus involve selecting the nonwoven nozzle from the multitude of different nonwoven nozzles, in particular the one that best matches a fiber sliver with the fiber sliver property.However, since the sliver properties include not only a sliver weight, a sliver width, a sliver thickness and a sliver density but also the material of the sliver and the speed of the sliver entering the nonwoven nozzle, a specific nonwoven nozzle is only suitable for processing a specific material or material mix at a specific production speed.

[0008] The object of the present invention is therefore to propose a device and a method that allow the path between the clamping point and the nonwoven nozzle to be variably configured, so that the optimal position can be set for each material and each production speed. This object is achieved by a device and a method having the features of independent patent claims 1 and 12.

[0009] To achieve this object, a device for a textile machine with a drafting system for drawing at least one fiber sliver and with a nonwoven nozzle arranged at the output of the drafting system for gathering the drawn fiber sliver and with a base frame is proposed, wherein the nonwoven nozzle is held stationary on the base frame. The drafting system has at least one input roller pair and one output roller pair. The input roller pair has a bottom roller and a pressure roller. The output roller pair has a bottom roller, a pressure roller, and a deflection roller. A clamping point is formed between the deflection roller and the bottom roller of the output roller pair. Furthermore, an adjustment of a travel path for the fiber sliver between the clamping point and the nonwoven nozzle is provided.

[0010] The drafting system, consisting of a plurality of roller pairs, is attached to the drafting system support by supports for the individual roller pairs. The support attachments can be designed to be movable relative to one another on the drafting system support, so that the distance between the individual roller pairs can be varied. The first roller pair of the drafting system, into which the fiber sliver(s) to be covered feeds, is referred to as the input roller pair. The last roller pair, from which the drawn fiber sliver reaches the downstream nonwoven nozzle, is referred to as the output roller pair. Depending on the design of the drafting system, additional roller pairs can be arranged between the input roller pair and the output roller pair. In addition, the output roller pair, consisting of a bottom roller and a pressure roller, is supplemented by a deflection roller that follows the pressure roller in a running direction of the fiber sliver and is attached to the bottom roller.The nip point is formed between the bottom roller and the deflection roller of the output roller pair. The arrangement of the deflection roller specifies a direction for the drawn fiber sliver towards the web nozzle and defines an angle of impact in the web nozzle. The web nozzle is arranged at a specific distance from the drafting system. The reference point for determining this distance can be any element of the drafting system or the drafting system support on one side of the drafting system, and any point on the web nozzle or the base frame in which the web nozzle is anchored on one side of the web nozzle. It has been shown that the nip point between the deflection roller and the bottom roller of the output roller pair is ideal for determining the distance on the drafting system side, which subsequently defines the travel path between the nip point and the web nozzle.

[0011] Advantageously, the drafting system is attached to a drafting system support held on the base frame, wherein the travel path is adjusted by setting a distance between the drafting system and the web nozzle by adjusting the drafting system support relative to the base frame. The distance is adjusted, for example, by moving the drafting system support on the base frame. Preferably, the drafting system support is adjusted parallel to the base frame. In one possible embodiment, a side of the drafting system support assigned to the base frame can be provided with a series of grooves which engage correspondingly in matching counter-grooves in the base frame. The distance can thus be changed by one groove at a time. In an exemplary embodiment with a rack and gears as counterparts, continuous adjustment is possible.In an alternative embodiment, a sliding guide is arranged on the base frame, along which the drafting system support is moved. To prevent lateral movement of the drafting system support relative to the running direction of the fiber sliver, the sliding guide is designed accordingly, for example, as a rectangular or dovetail guide. A further conceivable embodiment is in which the drafting system support is equipped with a carriage, via which the drafting system can be moved on the base frame.

[0012] In an alternative embodiment, the drafting system is attached to the base frame, with the deflection roller of the output roller pair being held by a bearing arm. The travel path is adjusted by a rotational movement of the bearing arm about a rotational axis of the lower roller of the output roller pair. The deflection roller opposite the lower roller of the output roller pair is rotatably mounted on the bearing arm, and the bearing arm, in turn, is rotatably mounted about the rotational axis of the lower roller. When the bearing arm rotates about the rotational axis of the lower roller, the clamping point on a surface of the lower roller shifts, and the travel path between the clamping point and the web nozzle is reduced or increased.

[0013] In another alternative embodiment, the drafting system is mounted on a drafting system support mounted on the base frame by a pivot axis. The travel path is adjusted by pivoting the drafting system support around the pivot axis. This pivoting movement moves the entire drafting system around the pivot axis, ensuring that the draft ratios between the roller pairs of the drafting system are maintained.

[0014] Advantageously, the drafting system support or the base frame or the rotational axis of the lower roller of the output roller pair or the pivot axis is provided with a scale to indicate the position of the drafting system. This has the advantage of enabling repeatability of the settings. Different settings can be specified with a value for different production processes and materials, and precise adjustment is possible using the scale. Particularly preferably, the drafting system support to the base frame or the bearing arm of the deflection roller to the rotational axis of the lower roller or the drafting system support in the pivot axis has a locking device. To prevent adjustment of the distance during operation due to vibrations and other operational influences, the drafting system support is secured to the base frame with a locking device.Locking devices in many different designs are known from the state of the art and can be implemented, for example, using clamping levers or clamping screws.

[0015] Preferably, manual adjustment of the drafting system support or the bearing arm is provided. Manual adjustment allows presetting of the device independently of a power supply. In a design of the drafting system support with a sliding guide, the manual adjustment can be implemented, for example, as a handwheel, which, when rotated via a spindle, changes the position of the drafting system relative to the nonwoven nozzle. Designs with handwheels directly on the rotation axis or the pivot axis are also possible in alternative device designs. However, designs with levers or adjusting screws are also conceivable.

[0016] Advantageously, as an alternative to manual adjustment of the drafting system support or the bearing arm, a drive for adjusting the drafting system support or the bearing arm is provided. The drive can be electric, hydraulic, or electro-pneumatic. Adjusting the travel path or distance with a drive has the advantage that the same setting can be easily repeated. It is also possible to adjust the travel path or distance during operation, eliminating the need to manually intervene in a running system and ensuring a high level of safety with automated adjustment. It is also advantageous if the web nozzle is mounted rotatably on the base frame. By rotating the web nozzle, the angle of impact of the drawn fiber sliver on the web nozzle can be further adjusted.In a further development of the device, a coupling of the displacement of the clamping point and an inclination of the fleece nozzle is also conceivable.

[0017] Furthermore, a textile machine with a device according to the above description is proposed. Installing the device with the option of adjusting the travel path between the clamping point and the nonwoven nozzle offers the advantage that the textile machine can be operated with an optimal setting in a variety of production processes, depending on the production volume and the materials to be processed.

[0018] Advantageously, a control system is provided for automatically adjusting the path between the clamping point and the nonwoven nozzle when the operating mode or fiber sliver properties change. In this case, the device is equipped with a drive for adjusting the path between the clamping point and the nonwoven nozzle, and the textile machine's control system accesses this drive directly. If, for example, the textile machine is ramped up to a higher production level, the path between the clamping point and the nonwoven nozzle is automatically adjusted accordingly. Even when the textile machine is readjusted to a change in material, the path between the clamping point and the nonwoven nozzle can be adjusted automatically.

[0019] Tests have shown that the position of a fiber impact zone in the nonwoven nozzle is important for the quality of the fiber sliver gathered after the nonwoven nozzle. This position depends on various factors, the main ones being material, fiber properties (fiber length, fiber weight, degree of parallelism of the fibers), production speed and angle of impact of the fibers. To counteract this circumstance, the control system preferably provides for the input of at least one of the following factors: fiber material, fiber length, fiber weight, degree of parallelism of the fibers, production speed. The control system stores travel paths between the clamping point and the nonwoven nozzle that can be set according to the various factors. Based on the data known to the control system, automatic adjustment of the travel path between the clamping point and the nonwoven nozzle is possible.

[0020] It is also advantageous if the control system is connected to a drafting system monitor and if operating data can be transmitted to the control system. Based on the operating data, such as production volume or sliver weight, the control system can react to changes by correcting the path between the nip point and the web nozzle during operation in order to guarantee high quality at all times. It is also advantageous if the textile machine is connected to a central control system and if the path can be specified by the central control system. The specific data for a manufacturing process and the materials to be processed are stored in the central control system, which eliminates the need for individual input in the textile machine control system.

[0021] Furthermore, a method for operating a textile machine is proposed. The textile machine comprises a drafting system for drawing at least one fiber sliver and a nonwoven nozzle arranged at the output of the drafting system for gathering the drawn fiber sliver, as well as a base frame, wherein the nonwoven nozzle is fixedly mounted on the base frame. The drafting system comprises at least one input roller pair and one output roller pair. The input roller pair comprises a bottom roller and a pressure roller. The output roller pair comprises a bottom roller, a pressure roller, and a deflection roller. A nip point is formed between the deflection roller and the bottom roller of the output roller pair.

[0022] Advantageously, the drafting system is mounted on a drafting system support held on the base frame, with the travel path being adjusted by positioning the drafting system support relative to the base frame. In an alternative method, the drafting system is mounted on the base frame, with the deflection roller of the output roller pair being held by a bearing arm. To adjust the travel path, the bearing arm is rotated about the rotation axis of the bottom roller of the output roller pair. In a further alternative method, the drafting system is mounted on a drafting system support held on the base frame by a pivot axis, with the drafting system support being pivoted about the pivot axis to adjust the travel path. This method achieves a consistently high quality of the end product of the textile machine.

[0023] It is also advantageous if the textile machine has a control system that automatically adjusts the travel path when the production speed of the textile machine changes. This ensures that the conditions in the textile machine are adapted over a specified production period.

[0024] Preferably, the distance is measured using a sensor, compared with a specified value in the control system, and adjusted accordingly. If there is a persistent deviation between the specified value and the measured distance, an alarm is triggered. This alarm can indicate manual intervention in production and prevent quality losses due to production with suboptimal settings.

[0025] Further advantages of the invention are described in the following exemplary embodiments. They show, in schematic representation: Figure 1 shows a side view of a first embodiment of the device;

[0026] Figures 2 to 5 show a side view of further embodiments of the adjustment between the drafting system support and the base frame;

[0027] Figure 6 is a side view of a second embodiment of a

[0028] Textile machine with the device;

[0029] Figures 7 and 8 show a side view of a third embodiment of the device and

[0030] Figures 9 and 10 show a side view of a fourth embodiment of the device.

[0031] Figure 1 shows a schematic representation of a first embodiment of the device for a textile machine with a drafting system 1 for drawing at least one fiber sliver 2 and with a nonwoven nozzle 3 arranged at the output of the drafting system 1 for gathering a drawn fiber sliver 4. The device has a base frame 5 in which the nonwoven nozzle 3 is held in a stationary manner. The drafting system 1 consists in the representation shown of at least one input roller pair 14 and one output roller pair 18. Between the input roller pair 14 and the output roller pair 18, a middle roller pair 23 is indicated, which corresponds to a further embodiment of a drafting system 1. The input roller pair 14 has a bottom roller 16 and a pressure roller 17 and is fastened to a drafting system support 6 by a support 15. Also attached to the drafting system support 6 are the output roller pair 18 via a support 19 and the middle roller pair 23 via a support 24.The center roller pair 23 has a bottom roller 25 and a pressure roller 26. The output roller pair 18 has a bottom roller 20 and a pressure roller 21. In addition, a deflection roller 22 is attached to the bottom roller 20 of the output roller pair 18. The at least one fiber sliver 2 to be drawn is introduced into the input roller pair 14 in a running direction 13 and subsequently passes through the center roller pair 23 and the output roller pair 18. Due to the different rotational speeds of the roller pairs 14, 23, and 18, the fiber sliver 2 is drawn. The drawn fiber sliver 4 leaves the drafting system 1 from a clamping point 42 formed by the bottom roller 20 of the output roller pair 18 and the deflection roller 22 attached thereto in the direction of the nonwoven nozzle 3. The fiber sliver 28 gathered in the nonwoven nozzle 3 is subsequently fed to further processing or deposition in the transport direction 27 shown.

[0032] The drafting system support 6 is held on the base frame 5 in such a way that a movement 29 of the drafting system support 6 relative to the base frame 5 is possible. The movement 29 of the drafting system support 6 displaces the drafting system 1 mounted on the drafting system support 6 relative to the nonwoven nozzle 3 mounted on the base frame 5. This allows a distance 7 to be adjusted between the drafting system support 6 or the output roller pair 18 of the drafting system 1 and the nonwoven nozzle 3. Adjusting the distance 7 also results in a change in the travel path 41.

[0033] In the following description of the alternative embodiments of the adjustment between the drafting system support 6 and the base frame 5 shown in Figures 2 to 5, the same reference numerals are used for features which are identical in their design and / or mode of operation compared to the first embodiment shown in Figure 1. Unless otherwise stated, their design and / or mode of operation corresponds to the design and / or mode of operation of the features already described above. Furthermore, an illustration of the entire drafting system 1 is omitted in Figures 2 to 5, as this is not essential for explaining the adjustment. Only the support 15 and the support 19 are shown for orientation. In Figure 2, the mutually facing sides of the base frame 5 and the drafting system support 6 are at least partially provided with a series of recesses which form a grid 30.The drafting system support 6 can thus be displaced relative to the base frame 5 in the direction of movement 29 by one pitch of the grid 30. In this way, the distance 7 between the drafting system support 6 and the nonwoven nozzle 3, which is fixedly held on the base frame 5, can be adjusted. To prevent unintentional adjustment of the distance 7 due to operational influences, a locking device 9 is provided between the drafting system support 6 and the base frame 5.

[0034] In Figure 3, the base frame 5 is provided with a sliding guide 31 in which the drafting system support 6 is held. In the sliding guide 31, the drafting system support 6 can be adjusted relative to the base frame 5 by the movement 29. In this way, the distance 7 between the drafting system support 6 and the nonwoven nozzle 3 held stationary on the base frame 5 can be adjusted. To prevent unwanted adjustment of the distance 7 due to operational influences, a locking device 9 is provided between the drafting system support 6 and the base frame 5. To enable exact repeatability of the adjustment of the distance 7, a scale 8 is provided on the base frame 5.

[0035] In Figure 4, in contrast to the embodiment according to Figure 3, the drafting system support 6 is equipped with a drive 32. The drive 32 enables a movement 29 of the drafting system support 6 relative to the base frame 5 and thus an adjustment of the distance 7.

[0036] Figure 5 shows a further development of the embodiment according to Figure 3. The drafting system support 6 is provided with a spindle 34. The spindle 34 is rotatably held in a bearing 33 which is fastened to the base frame 5. A handwheel 35 is fastened to an end of the spindle 34 facing away from the drafting system support 6. Rotation of the handwheel 35 and thus of the spindle 34 causes a movement 29 of the drafting system support 6 in the sliding guide 31 relative to the base frame 5, thus enabling adjustment of the distance 7. In an alternative embodiment shown in dashed lines, the spindle 34 is connected to an electric drive 37 via a belt drive 36, thereby enabling motorized adjustment of the distance 7.

[0037] Figure 6 shows a schematic representation of a further embodiment of the device for a textile machine with a drafting system 1 for drawing at least one fiber sliver 2 and with a

[0038] 1 arranged nonwoven nozzle 3 for gathering a drawn fiber sliver 4. The device has a base frame 5, to which the nonwoven nozzle 3 is held stationary. The drafting system 1 consists, in the illustration shown, of an input roller pair 14 and an output roller pair 18. A center roller pair 23 is arranged between the input roller pair 14 and the output roller pair 18. The input roller pair 14 is attached to the drafting system support 6 by the support 15. Also attached to the drafting system support 6 are the output roller pair 18 via the support 19 and the center roller pair 23 via the support 24.

[0039] The at least one fiber sliver 2 to be drawn is introduced into the input roller pair 14 in a running direction 13 and subsequently passes through the middle roller pair 23 and the output roller pair 18. Due to the different speeds of the roller pairs 14, 23 and 18, the fiber sliver

[0040] 2 is drawn. The drawn fiber sliver 4 leaves the drafting system 1 in the direction of the web nozzle 3. The fiber sliver 28 gathered in the web nozzle 3 then passes through a sliver measurement 39 and is fed for further processing or deposition in the transport direction 27 shown. The sliver measurement 39 is used, for example, to measure the fiber sliver thickness, uniformity or speed. The drafting system carrier 6 is held on the base frame 5 in a sliding guide 31 in such a way that a movement 29 of the drafting system carrier 6 relative to the base frame 5 is possible. The drafting system carrier 6 is provided with a spindle 34. The spindle 34 is rotatably held in a bearing 33 which is fastened to the base frame 5. A belt drive 36 with an electric drive 37 is arranged at an end of the spindle 34 facing away from the drafting system carrier 6.By rotating the spindle 34, the movement 29 of the drafting system support 6 in the sliding guide 31 relative to the base frame 5 is caused and thus an adjustment of the distance 7 is made possible.

[0041] The movement 29 of the drafting system support 6 displaces the drafting system 1 mounted on the drafting system support 6 relative to the nonwoven nozzle 3 mounted on the base frame 5. This allows the distance 7 between the drafting system support 6 or the output roller pair 18 of the drafting system 1 and the nonwoven nozzle 3 to be adjusted via the drive 37. A sensor 12 measures the current position of the drafting system support 6 and thus the size of the distance 7. The device also has a controller 38. The signals from the sliver measurement 39 and the sensor 12 are processed in the controller 38, and corresponding control signals are forwarded to the drive 37.

[0042] Furthermore, a pivot point 40 is shown in the area of ​​the fleece nozzle 3. The fleece nozzle 3 can be rotated relative to the base frame 5 around the pivot point 40.

[0043] Figures 7 and 8 show a schematic representation of a third embodiment of the device, with Figure 8 showing an enlargement of part of the representation in Figure 7. The device has a drafting system 1 for drawing at least one fiber sliver 2 and with a fleece nozzle 3 arranged at the output of the drafting system 1 for gathering a drawn fiber sliver 4. Furthermore, a base frame 5 is provided, in which the fleece nozzle 3 is held in a stationary manner. In the representation shown, the drafting system 1 consists of at least one input roller pair 14 and one output roller pair 18. Between the input roller pair 14 and the output roller pair 18, a middle roller pair 23 is indicated, which corresponds to a further embodiment of a drafting system 1. The input roller pair 14 has a bottom roller 16 and a pressure roller 17 and is fastened to the base frame 5 by a support 15.Also mounted on the base frame 5 are the output roller pair 18 via a support 19, and the center roller pair 23 via a support 24. The center roller pair 23 includes a bottom roller 25 and a pressure roller 26. The output roller pair 18 includes a bottom roller 20 and a pressure roller 21. Additionally, a deflection roller 22 is attached to the bottom roller 20 of the output roller pair 18, which deflection roller is held in a rotational axis 44 of the bottom roller 20 via a bearing arm 43.

[0044] The at least one fiber sliver 2 to be drawn is introduced into the input roller pair 14 in a running direction 13 and subsequently passes through the middle roller pair 23 and the output roller pair 18. Due to the different speeds of the roller pairs 14, 23 and 18, the fiber sliver 2 is drawn. The drawn fiber sliver 4 leaves the drafting system 1 from a clamping point 42, formed by the bottom roller 20 of the output roller pair 18 and the deflection roller 22 attached thereto, in the direction of the nonwoven nozzle 3. The fiber sliver 28 gathered in the nonwoven nozzle 3 is subsequently fed to further processing or deposition in the transport direction 27 shown.

[0045] The deflection roller 22 is held by the bearing arm 43 in the rotational axis 44 of the lower roller 20 of the output roller pair 18 in such a way that a rotation 45 of the bearing arm 43 about the rotational axis 44 is possible. The rotation 45 of the bearing arm 43 displaces the deflection roller 22 held on the bearing arm 43 along a surface of the lower roller 20. This allows a position of the clamping point 42 to be changed and a travel path 41 between the clamping point 42 and the fleece nozzle 3 to be set. In Figure 8, an exemplary rotated position of the bearing arm 43 is shown in dash-dotted lines for the embodiment according to Figure 7. Furthermore, a scale 8 attached to the rotational axis 44 for reading the setting of the bearing arm 43 and thus the travel path 41 is also shown. A locking device 9 is also provided to secure a made setting, shown here as an example as a clamping screw.

[0046] Figures 9 and 10 show a schematic representation of a fourth embodiment of the device, with Figure 10 showing an enlargement of part of the representation according to Figure 9. The device has a drafting system 1 for drawing at least one fiber sliver 2 and with a fleece nozzle 3 arranged at the output of the drafting system 1 for gathering a drawn fiber sliver 4. The device has a base frame 5 in which the fleece nozzle 3 is held stationary. In the representation shown, the drafting system 1 consists of at least one input roller pair 14 and one output roller pair 18. Between the input roller pair 14 and the output roller pair 18, a middle roller pair 23 is indicated, which corresponds to a further embodiment of a drafting system 1. The input roller pair 14 has a bottom roller 16 and a pressure roller 17 and is fastened to a drafting system carrier 6 by a support 15.Also mounted on the drafting system support 6 are the output roller pair 18 via a support 19, and the center roller pair 23 via a support 24. The center roller pair 23 includes a bottom roller 25 and a pressure roller 26. The output roller pair 18 includes a bottom roller 20 and a pressure roller 21. Additionally, a deflection roller 22 is attached to the bottom roller 20 of the output roller pair 18.

[0047] The at least one fiber sliver 2 to be drawn is introduced into the input roller pair 14 in a running direction 13 and subsequently passes through the middle roller pair 23 and the output roller pair 18. Due to the different speeds of the roller pairs 14, 23 and 18, the fiber sliver 2 is drawn. The drawn fiber sliver 4 leaves the drafting system 1 from a clamping point 42, formed by the bottom roller 20 of the output roller pair 18 and the deflection roller 22 attached thereto, in the direction of the nonwoven nozzle 3. The fiber sliver 28 gathered in the nonwoven nozzle 3 is subsequently fed to further processing or deposition in the transport direction 27 shown.

[0048] The drafting system support 6 is held on the base frame 5 in a pivot axis 46, so that a pivoting movement 47 of the drafting system support 6 relative to the base frame 5 is possible. The pivoting movement 47 of the drafting system support 6 pivots the drafting system 1 fastened to the drafting system support 6 relative to the fleece nozzle 3 fastened to the base frame 5. This allows a travel path 41 between the clamping point 42 and the fleece nozzle 3 to be set. Figure 10 shows an exemplary position of the drafting system support 6 in dash-dotted lines for the embodiment according to Figure 9. Furthermore, a scale 8 attached to the pivot axis 46 is shown for reading the setting of the drafting system support 6 and thus the travel path 41. Also provided is a locking device 9 for securing a made setting, shown here as an example as a clamping screw.

[0049] List of reference symbols

[0050] 1 drafting system

[0051] 2 fiber band

[0052] 3 fleece nozzle

[0053] 4 Drawn sliver

[0054] 5 base frames

[0055] 6 drafting system supports

[0056] 7 Distance

[0057] 8 scale

[0058] 9 Locking mechanism

[0059] 12 Sensor

[0060] 13 Running direction of sliver

[0061] 14 input roller pairs

[0062] 15 Support input roller pair

[0063] 16 Lower roller input roller pair

[0064] 17 Pressure roller input roller pair

[0065] 18 pair of output rollers

[0066] 19 Support output roller pair

[0067] 20 Lower roller output roller pair

[0068] 21 Pressure roller output roller pair

[0069] 22 Um steering roller output roller pair

[0070] 23 middle roller pair

[0071] 24 Support middle roller pair

[0072] 25 Lower roller middle roller pair

[0073] 26 Pressure roller middle roller pair

[0074] 27 Transport direction

[0075] 28 Aggregated fiber band

[0076] 29 Movement of drafting system carrier

[0077] 30 grids

[0078] 31 sliding guide

[0079] 32 Drive 33 Bearing

[0080] 34 spindle

[0081] 35 Handwheel

[0082] 36 Belt drive 37 Drive

[0083] 38 Control

[0084] 39 Tape measurement

[0085] 40 pivot point

[0086] 41 Running path 42 Clamping point

[0087] 43 Bearing arm

[0088] 44 axis of rotation

[0089] 45 rotational movement

[0090] 46 Swivel axis 47 Swivel movement

Claims

Patent claims 1 . Device for a textile machine, wherein the device comprises a drafting device (1) for drawing at least one fiber sliver (2), a nonwoven nozzle (3) arranged at the output of the drafting device (1) for gathering the drawn fiber sliver (4), and a base frame (5), wherein the nonwoven nozzle (3) is held stationary on the base frame (5), wherein the drafting device (1) comprises at least one input roller pair (14) and one output roller pair (18), wherein the input roller pair (14) comprises a lower roller (16) and a pressure roller (17), and wherein the output roller pair (18) comprises a lower roller (20), a pressure roller (21) and a deflection roller (22), and wherein a clamping point (42) is formed between the deflection roller (22) and the lower roller (20) of the output roller pair (18), characterized in that an adjustment of a travel path (41) for the fiber band (2) is provided between the clamping point (42) and the fleece nozzle (3).

2. Device according to claim 1, characterized in that the drafting device (1) is fastened to a drafting device support (6) held on the base frame (5), wherein the adjustment of the travel path (41) is provided by adjusting a distance (7) between the drafting device support (6) and the nonwoven nozzle (3) by adjusting the drafting device support (6) relative to the base frame (5), or that the drafting device (1) is fastened to the base frame (5), wherein the deflection roller (22) of the output roller pair (18) is held via a bearing arm (43), and wherein the adjustment of the travel path (41) is provided by a rotational movement (45) of the bearing arm (43) about a rotational axis (44) of the lower roller (20) of the output roller pair (18), or that the drafting system (1) is fastened to a drafting system support (6) held on the base frame (5) by a pivot axis (46), wherein an adjustment of the travel path (41) is provided by a pivoting movement (47) of the drafting system support (6) about the pivot axis (46).

3. Device according to claim 2, characterized in that the drafting device support (6) or the base frame (5) or the rotation axis (44) of the lower roller (20) of the output roller pair (18) or the pivot axis (46) is provided with a scale (8) for indicating the position of the drafting device (1).

4. Device according to claim 2 or 3, characterized in that the drafting system support (6) to the base frame (5) or the bearing arm (43) of the deflection roller (22) to the axis of rotation (44) of the lower roller (20) or the drafting system support (6) in the pivot axis (46) have a locking device (9).

5. Device according to one or more of the preceding claims, characterized in that a manual adjustment of the travel path (41) is provided.

6. Device according to one or more of the preceding claims, characterized in that a drive (37) is provided for adjusting the travel path (41).

7. Device according to one or more of the preceding claims, characterized in that the fleece nozzle (3) is rotatably held on the base frame (5).

8. Textile machine with a device according to one or more of the preceding claims, characterized in that a control (38) is provided for automatically adjusting the travel path (41) between the clamping point (42) and the fleece nozzle (3) when changing the operating mode of the drafting device (1) or the properties of the fiber sliver (2).

9. Textile machine according to claim 8, characterized in that an input of at least one of the following factors is provided in the control (38): fiber material, fiber length, fiber weight, degree of parallelization of the fibers, production speed.

10. Textile machine according to claim 8 or 9, characterized in that the control (38) is connected to a monitoring system of the drafting system (1) and a transmission of operating data to the control (38) is provided.

11. Textile machine according to one or more of claims 8 to 10, characterized in that the textile machine is connected to a central control and a specification of the travel path (41) is provided by the central control.

12. Method for operating a textile machine with a drafting device (1) for drawing at least one fiber sliver (2) and with a nonwoven nozzle (3) arranged at the output of the drafting device (1) for gathering the drawn fiber sliver (4), and with a base frame (5), wherein the nonwoven nozzle (3) is held stationary on the base frame (5), wherein the drafting device (1) has at least one input roller pair (14) and one output roller pair (18), wherein the input roller pair (14) has a bottom roller (16) and a pressure roller (17), and wherein the output roller pair (18) has a bottom roller (20) and a pressure roller (21) and a deflection roller (22), and wherein between the deflection roller (22) and the bottom- roller (20) of the output roller pair (18) a clamping point (42) is formed, characterized in that a travel path (41) between the clamping point (42) and the fleece nozzle (3) is adjusted.

13. Method according to claim 12, characterized in that the drafting system (1) is fastened to a drafting system support (6) held on the base frame (5), wherein the adjustment of the travel path (41) is effected by setting the drafting system support (6) relative to the base frame (5), or that the drafting system (1) is fastened to the base frame (5), wherein the deflection roller (22) of the output roller pair (18) is held via a bearing arm (43), and wherein for adjusting the travel path (41), the bearing arm (43) is rotated about the rotation axis (44) of the lower roller (20) of the output roller pair (18), or that the drafting system (1) is fastened to a drafting system support (6) held on the base frame (5) with a pivot axis (46), wherein for adjusting the travel path (41), the drafting system support (1) is rotated about the pivot axis (46) is pivoted.

14. Method according to claim 12 or 13, characterized in that the textile machine has a control (38) and when the production speed of the textile machine changes, the travel path (41) is automatically adjusted by the control (38).

15. Method according to one or more of claims 12 to 14, characterized in that the travel path (41) is measured with a sensor (12), compared with a specification in the control (38) and adjusted according to the specification and that in the case of a If there is a remaining deviation between the specified distance and the measured distance (41), an alarm is issued.

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