TW201536973A - Pre-spun spinning machine equipped with yarn drawing device - Google Patents

Abstract

This invention is a pre-spun spinning machine, specifically referring to a section of the pre-spun spinning machine which is equipped with at least one yarn drawing device (2) for fiber bundle drawing (3). The yarn drawing device (2) comprises multiple rollers (4) each rotating around multiple rotation shafts (6). The pre-spun spinning machine (1) comprises at least one extraction equipment (5) which is setup at the rear portion of the yarn drawing device (2) along a conveying direction (T). The extraction equipment (5) has at least one extraction component (8) which rotates around the rotation shafts (6) and is supported by a driving device (7) to perform rotation.

Description

Spinning machine with drafting device

The present invention relates to a spinning pre-spinning machine, in particular a spinning pre-spinning machine (for example a section) having at least one drafting device for drawing a fiber bundle, wherein the drafting device comprises a plurality of a drafting device roll that rotates about a rotational axis, respectively, and wherein the spinning pre-spinning machine comprises at least one extraction device arranged in the direction of its transport behind the drafting device, the extraction device having at least one supported pivotable about the axis of rotation And can be placed in the rotational movement of the extraction element by means of the drive device.

In the prior art, in particular in the case of drafting, it is known to guide the fiber material, which is mostly drawn as a fiber woven material after the drafting device, by the drafting device, through the compactor (for example in the form of a woven hopper). And then transporting the fibrous material in the direction of the spinning can by means of one or more rotatable extraction elements, for example a pair of extraction discs, wherein the further between the drafting device and the extraction element can be carried out as follows Pulling (so-called tensioning): The circumferential speed of the extraction element is chosen to be higher than the circumferential speed of the drafting device roll which is connected before the compactor in the transport direction.

Furthermore, it has always been set in the prior art that the axis of rotation of the extraction element (or the plurality of extraction elements) and the axis of rotation of the associated drive are oriented parallel to the axis of rotation of the drafting device roll. Even though this solution has proven to be viable, there are still disadvantages associated with it, which are to be ruled out by the present invention.

According to the invention, the pre-spinning machine is characterized in that the extraction element and/or its drive has a rotational axis which is oriented at least oblique with respect to the axis of rotation of at least one of the drafting device rolls. In other words, unlike the prior art, at least one of the rotating shafts does not extend parallel to the rotating shaft of the at least one drafting device roll (wherein the rotating axes of the plurality or all of the drafting device rolls can be parallel to each other) Extended). Although the solution known in the prior art is always provided with a drive unit (individual drive or drive belt) projecting from the extraction device on the side, the solution according to the invention now allows the installation of the following extraction device: In the case of the extraction device, the axis of rotation of one of the respective extraction elements is for example oriented perpendicular to the axis of rotation of the drafting device roll, so that the space requirement on the side can be reduced. The same situation is established for the drive device of the extraction device. If the axis of rotation is oriented oblique to the axis of rotation of at least one or more of the drafting device rolls, it is conceivable to allow installation of the spinning machine as far as possible in the narrowest possible configuration, since it originally protrudes from the extraction device on the side The component (for example in the form of a drive shaft) can now be oriented, for example, in the longitudinal direction of the spinning machine before spinning. Furthermore, it has been shown that the quality of the fiber woven fabric can be improved when the extraction element is not in contact with the fiber woven material from above and/or below, but from the side, wherein this orientation can now be achieved by rotating the shaft or withdrawing the element This is also achieved by the orientation of the axis of rotation of the drive device of the extraction device, if desired.

In this context, it is advantageous for the pivoting axis of the extraction element and/or the rotational axis of the drive device to be preferably in the top view of the spinning machine and in the plane of rotation of at least one of the drafting device rollers. At an angle, the angle is between 70 and 110, preferably between 80 and 100, more preferably between 85 and 95. The axis of rotation of the extraction elements, which can be configured, for example, to each other, or the axis of rotation of the drive device, is therefore preferably oriented in a top view on the spinning machine before spinning In the longitudinal direction, the drive means of the extraction device can be placed, for example in the side view of the spinning machine, in the plane of the spinning shaft of at least a part of the drafting device roll.

Advantageously, in particular, the axis of rotation of the extraction element and/or the axis of rotation of the drive unit of the extraction element preferably extends perpendicularly to the axis of rotation of at least one of the drafting device rolls in a top view of the spinning machine. In other words, although the axes of rotation of all of the drafting device rolls preferably extend in the transverse direction of the spinning machine, for example from the direction of transport of the fiber bundles, the axis of rotation of the extraction element and/or its drive can be, for example, It is oriented in the length direction of the spinning machine before spinning.

In general, it should be pointed out that the extraction device of the spinning pre-spinning machine, which can be, for example, a section, in particular a double-end section with a separate drafting device, can of course also have more than one extraction. element. Preferably, two mutually adjacent, for example in the form of two withdrawal discs, wherein the axes of rotation of the respective extraction elements preferably extend in parallel, and wherein only one or more of the existing extraction elements can The respective drive unit is in operative connection.

It is particularly advantageous if the drive device is a separate drive device. In other words, that is to say that there can be a drive device, for example in the form of an electric motor, which is only connected to the extraction element of the extraction device. The advantage of the separate drive unit is the fact that the rotational speed of the extraction element can be changed independently of the rotational speed of the drafting device roll, wherein this change can be effected by means of the control unit of the pre-spinning textile machine or manually. It is thus finally possible to change the above-mentioned tensioning tension before, during or after the drafting of the fiber bundle or to match it continuously or stepwise to a certain rating. In this case, the drive device can be placed under the extraction device or on the side, for example, in the side view of the spinning machine. In addition, it is conceivable that the axis of rotation of the extraction element and/or the axis of rotation of its drive device are at an angle to the horizontal plane in the side view of the spinning machine before spinning, the angle being between 0 and 90°, preferably It is from 20 to 70, more preferably from 30 to 60.

Furthermore, it is advantageous if the rotational axis of the extraction element and/or the rotational axis of its drive device extend in the transport direction or at an angle to the transport direction in the top view of the spinning machine before spinning, the absolute value of which is at zero. ° to 20 °, the school is preferably 0 ° to 15 °, more preferably 0 ° to 10 °. In this case, the drive device can be placed, for example, in the top view of the spinning machine before the spinning between the input roller of the drafting device and the output roller of the drafting device which is arranged in the transport direction before the extraction device or at least partially Extend in this area. In addition, it is conceivable for the extraction element to be placed in the top view in the direction of the transport direction after the respective drive device, so that a relatively short design can also be achieved in the longitudinal direction of the textile machine before spinning.

It is also advantageous if the rotational axis of the drive device and the rotational axis of the extraction element extend parallel or collinearly to one another. It is also conceivable for the rotational axes to extend obliquely to one another or to intersect in a common plane (in which case a corresponding (conical) transmission or steering belt must be present between the drive shaft and the rotary shaft of the extraction element). However, parallel or collinear orientation has the advantage that the drive and the extraction elements can be coupled directly to one another. For example, it is conceivable in this context to attach the extraction element, which can be present, for example, as one of a plurality of extraction discs, directly to the drive shaft or the drive shaft of the drive. Of course, the connection of the drive and the extraction element can also take place via an intermediately connected transmission or one or more belts or chains.

As already mentioned, it is advantageous if the extraction element is one or two extraction discs of the extraction device. The two withdrawal discs, for example, form a common clamping line or a fine slit, wherein the fiber woven fabric arriving from the drafting device passes between the two extraction rolls as it passes through the extraction device, and is guided by the extraction roller and actively Pull out and may still be pulled here. The extraction disc is preferably oriented such that its axis of rotation is parallel to (individual) drive connected to at least one of the extraction discs The rotating shaft of the moving device extends.

It is particularly advantageous for a pressure device to be arranged between the drafting device and the extraction device for pressing the fiber web which is removed from the drafting device in the transport direction and which is drawn by means of the drafting device, wherein the extraction element is Constructed as part of the compactor. The compactor, which may be the weaving hopper of the fiber woven material, causes the fiber woven fabric to be pressed from the side and the fiber woven fabric is compressed there. At the same time, since the individual fibers of the fiber woven fabric collide with the bottom of the compactor surrounding the output end, a vortex of the outer fiber is caused, and thus the desired so-called sliver sticking force (=stretching ability) of the fiber woven fabric is caused. Improvement. It is now preferably provided that the extraction element forms part of the compactor. In other words, it can be provided that the fiber woven fabric is also in contact with the at least one extraction element when passing through the compactor. If the respective withdrawal element is now placed in a rotational movement during the operation of the drafting device, there is a moving surface that can support the transport of the fibers through the compactor. That is to say, it may be advantageous for the extraction element to be placed relative to the compactor such that the surface of the respective extraction element in the region of the compactor of the compactor through which the fiber woven material passes can be in the direction of transport of the fiber woven material. On the movement. In this case, the outwardly projecting fiber ends of the fiber woven fabric can be guided by the extraction elements and actively affixed to the remaining fiber woven fabric so that the passage of the compactor can be positively affected.

In particular, it is advantageous to configure the extraction element to extract the disk; the extraction device comprises a further extraction disk in addition to the extraction disk; and the two extraction disks form a common gap which forms the compactor. Through the opening. That is to say, the fiber woven fabric is in this case not in contact with, or only under certain conditions, the output wall of the compactor. More precisely, the extraction disc forms the actual output of the compactor such that the extraction disc and the compactor form the construction unit of the pre-spinning machine to a certain extent.

It is also advantageous for the through-opening to form an output of the press which is preferably arranged in the transport direction after the input. In this case, the fiber woven material reaches the compactor, for example via a funnel-shaped input, where it is, for example, folded and pressed, and then pulled out of the disc and finally pulled out of the compactor. In particular, the extraction disk or its pivoting axis is oriented here such that it contacts the fiber web on the side in the plan view of the drafting device.

It is also advantageous if the two extraction discs each have a region facing the respective adjacent extraction disc and a region facing away from the adjacent extraction disc, wherein the regions facing away from the respective adjacent extraction discs respectively transition to the pressure. In the surface segment of the tensioner. That is, although the segments of the extracted discs facing each other may form the output or output slit of the compactor, it is contemplated that the segments facing away from the respective opposing extraction discs are directly adjacent to the respective surface segments of the compactor. Of course, there should be a certain or even small gap between the surface of the correspondingly ejected disc that moves during operation and the compactor in order to avoid grinding between the extraction disc and the surface of the compactor.

In this context, it is advantageous if the extraction disk forms the bottom region and/or the side wall region of the pressure device, wherein the pressure device is preferably and at least partially configured in the shape of a funnel. That is, the compactor can have an inwardly directed surface that tapers in the direction of transport, the surface being formed in part by the corresponding surface segments of the extracted disc. The surface in contact with the same fiber web of the compactor is always constructed differently from the prior art. According to the invention, the individual surface segments are constructed to be movable by extracting the surface of the disc from the surface of the disc. Fragments are implemented.

Advantageously, the pre-spinning machine has a sensor arranged in the transport direction in the region behind the drafting device for determining the speed of the fiber web passing through the region during the operation of the spinning machine before spinning. This measurement can take place, for example, by means of mechanical elements which can, for example, also be in contact with the fiber web. However, it is preferred to use a non-contact sensor, for example by Optical methods to determine this speed. The advantage of the corresponding speed determination lies in the fact that it is possible to check and, if necessary, match the actual tensioning pull.

Furthermore, it is advantageous if the pre-spinning machine comprises a control unit which is designed to change the rotational speed of the drive according to the signal of the sensor such that the matching of the tensioning pull can finally be carried out. If the determined speed is less than the threshold stored in the control unit, the rotational speed of the drive should be increased in order to thereby increase the tensioning pull. Conversely, when the speed of the fiber woven fabric is determined by means of the sensor and thus the tensioning is too high, the suppression of the rotational speed should be carried out.

1‧‧‧Spinning pre-spinning machine

2‧‧‧Drawing device

3‧‧‧Fiber bundle

4‧‧‧Drawing device roll

5‧‧‧Extracting equipment

6‧‧‧Rotary axis

7‧‧‧ drive

8‧‧‧Extracting components

9‧‧‧ Pull out the disc

10‧‧‧Compressor

11‧‧‧ Sensor

12‧‧‧Control unit

13‧‧‧ sidewall area

14‧‧‧ bottom area

15‧‧‧Fiber wovens

16‧‧‧Steering device

17‧‧‧Spinning cans

18‧‧‧ Turntable

19‧‧‧through opening

20‧‧‧ input

21‧‧‧ Output

22‧‧‧Land

T‧‧‧Transportation direction

1 is a schematic side view of a section as is known from the prior art; FIG. 2 is a schematic cut-away portion of a section known from the prior art; FIG. 3 is a schematic illustration of a spinning pre-spinning machine according to the present invention. Fig. 4 is a schematic cut-away portion of another spinning pre-spinning machine according to the present invention; Figure 5 is an alternative embodiment of the solution shown in Figure 4; Figure 6 is a weaving from the prior art. Figure 7 is a partial cross-sectional side view of a woven hopper in accordance with the present invention; and Figure 8 is a partial cross-sectional side view of the woven hopper shown in Figure 7.

FIG. 1 shows, in a side view, schematically and as an example of a pre-spinning machine 1 according to the invention, a section for drawing (homogenizing) a bundle of bundles of fibers 3 . During the operation of the section, the fiber bundles 3 (for example in the form of fiber strips) are removed from one or more so-called spinning cans 17 by means of an extraction device and are fed to the segments by the respective deflection device 16 . corresponding The drafting device 2 (or a plurality of drafting devices 2 that are fed to the section in the case of a multi-end section).

The drafting device 2 is generally constituted by three or more roller pairs, which may respectively include at least one lower roller and upper roller. The desired pulling of the fiber bundles 3 is ultimately produced by the fact that the individual lower rolls, and thus the respective upper rolls which are in contact therewith, have an increasingly higher circumferential speed in the indicated conveying direction T of the fiber bundles 3.

Immediately after the drafting device roll 4 of the drafting device 2, the drawn fibrous material (=Faservlies 15) is finally guided through the compactor 10, preferably the compactor 10 It is constructed as a woven hopper and causes compression of the fiber woven fabric 15. Immediately thereafter, the fiber woven material 15 reaches the region of the extraction device 5 after passing through the compactor 10, which typically comprises a plurality of rotatably or at least partially driven extraction elements 8, for example in two The extraction element 8 in the form of a withdrawal disc 9 of the side contact fiber web 15 is contacted. The extraction device 5 ultimately leads to further pulling of the fiber web 15 and at the same time its tensile strength due to the corresponding high conveying speed. Finally, the fiber web 15 usually reaches the area of the rotating turntable 18 and is annularly stored by the turntable 18 into the provided spinning can 17 .

Furthermore, as is apparent from FIG. 1 in conjunction with FIG. 2, which discloses a possible drive scheme of the conventional section, it has hitherto been common in the prior art to rotate the shaft 6 of each drafting device roll 4 and The axes of rotation 6 of the extraction elements 8 are oriented parallel to each other so that in the absence of a steering device, the individual components can be driven by means of a central drive or two separate drives 7 as shown in FIG. 2, wherein the drive shaft It also extends parallel to the axis of rotation 6 .

On the other hand, if the drive unit 7 and/or the extraction element 8 , that is to say in this case the rotary shaft 6 of the two extraction discs 9 , are inclined to the rotational axis 6 of the at least one drafting device roller 4 , preferably inclined to all, usually parallel to one another The rotating shaft 6 of the drafting device roll 4 is arranged, and the corresponding spinning machine 1 is obtained. Multiple advantages or possibilities for improvement.

For example, it is conceivable to connect one of the extraction element 8 or the extraction element 8 directly to the drive shaft of the individual drive device, in which case the rotational axis 6 of the drive device 7 and the rotational axis of the respective extraction element 8 6 is about the axis of rotation of the drafting device roll 4 being inclined.

Although it is advantageous to rotate the rotational axis 6 of the individual drive device and the rotational axis 6 of the two extraction discs 9 by 90° with respect to the rotational axis 6 of the drafting device roller 4, it is of course also conceivable to differ from 90°. angle. In any case, the different orientations of the rotational axis 6 of the drive device 7 and/or the extraction element 8 allow for a particularly space-saving arrangement of the respective component.

For example, it will be conceivable to place the separate drive device below the drafting device roll 4. FIG. 3 also shows that the individual drive can be fixed in a skewed manner, wherein the vertical or horizontal orientation is of course not excluded (furthermore, FIG. 4 only reveals a possible possible mutual arrangement of the individual components, wherein the extraction disk 9 and its individual drive are extracted. The circular representation of the device does not necessarily mean that its axis of rotation 6 is necessarily oriented vertically, but preferably in the orientation shown in Figure 3.

Figure 3 also reveals another advantage of the proposed separate drive. Since the individual drive unit achieves a separate rotational speed adjustment of the extraction element 8, it is also possible to change the tensioning tension of the spinning machine 1 before the spinning drive by matching the respective drive rotational speeds of the individual drive devices before, during or after the drafting operation. The tensioning pull is understood to mean the withdrawal of the disc 9 and the drafting device roll 4 placed directly before the extraction disc, ie the ratio of the circumferential speed of the drafting device roll 4 placed in the region of the output of the drafting device). Although the matching of the drive speeds can be carried out manually, it can also be matched continuously or stepwise by means of the control unit 12 indicated in FIG. Finally, the control unit 12 can be coupled to the sensor 11 schematically disclosed in FIG. 3, which preferably detects the speed of the fiber web 15, Over this speed, the tensioning pull can finally be determined with the speed of the fiber strip at the output of the known drafting device 2.

In addition to the separate drive of the extraction element 8, it is finally advantageous if the individual drafting device rollers 4 are driven by respective individual drive devices. Thus, for example, FIG. 4 discloses a conceivable embodiment in which the lower rolls (input rolls and intermediate rolls) placed at the beginning of the drafting device 2 in the transport direction T are preferably constructed, for example, by a belt 22 The first individual drive of the twin-shaft motor is connected and the lower roller (delivery roller) arranged at the end of the drafting device 2 is connected to another separate drive.

The difference between FIG. 5 and FIG. 4 ultimately consists in that the driven extraction roller is not connected directly, but is connected via a belt 22 to the associated drive unit 7.

Finally, FIG. 6 discloses a weaving hopper which is known in principle from the prior art and which can be used, for example, as a compactor 10. The woven hopper has in principle an opening acting as an input 20 and a through opening 19 for compressing the fiber woven material 15, which can simultaneously serve as the output end 21 of the fiber woven material 15.

Although it is customary in the prior art to arrange the compactor 10 as a separate component between the drafting device 2 and the extraction disc 9, the mounting of the extraction element 8 according to the invention achieves the examples in Figures 7 and 8. The solution shown (wherein the axis of rotation 6 of the extraction disc 9 is oriented perpendicular to the axis of rotation 6 of the drafting device roll 4).

As can be seen from the figures, the two extraction discs 9 can be part of the compactor 10, which is preferably present as a woven hopper. For example, it is conceivable for the bottom region 14 and/or the side wall region 13 to have a corresponding recess, in which the individual extraction discs 9 can project into the recess and thus form part of the inner surface of the compactor 10. Two extraction discs 9 The rotation (the direction of rotation is indicated by the quarter-circle arrow in Fig. 7) finally causes the fiber web 15 to be actively gathered in the region of the gap formed by the extraction disc 9, so as to ensure a particularly advantageous fiber weave guide. .

The invention is not limited to the disclosed and described embodiments. Modifications within the scope of the patent application are also possible, such as combinations of features, even if they are shown and described in different embodiments.

2‧‧‧Drawing device

3‧‧‧Fiber bundle

4‧‧‧Drawing device roll

5‧‧‧Extracting equipment

6‧‧‧Rotary axis

7‧‧‧ drive

8‧‧‧Extracting components

9‧‧‧ Pull out the disc

10‧‧‧Compressor

11‧‧‧ Sensor

15‧‧‧Fiber wovens

T‧‧‧Transportation direction

Claims (18)

A spinning pre-spinning machine (1), in particular a section, having at least one drafting device (2) for drawing a fiber bundle (3), wherein the drafting device (2) comprises a plurality of a drafting device roll (4) capable of rotating about a rotating shaft (6), respectively, wherein the spinning pre-spinning machine (1) comprises at least one disposed in the conveying direction (T) behind the drafting device (2) The extraction device (5), wherein the extraction device (5) has at least one extraction element (8) that is rotatable about a rotational axis (6) and can be placed in rotational movement by means of a drive device (7), wherein The extraction element (8) and/or its drive device (7) has a rotational axis (6), wherein the rotational axis (6) is oriented at least with respect to the rotational axis (6) of at least one of the drafting device rollers (4) For the tilt. A spinning pre-spinning machine according to the first aspect of the invention, wherein the rotating shaft (6) of the extracting member (8) and/or the rotating shaft (6) of the driving device (7) and the drafting device roller (4) The axis of rotation (6) of at least one of them is sandwiched at an angle wherein the angle is between 70° and 110°. A spinning pre-spinning machine as described in claim 2, wherein the angle is between 80° and 100°. A spinning pre-spinning machine as described in claim 2, wherein the angle is between 85° and 95°. A spinning pre-spinning machine according to the first aspect of the invention, wherein the rotating shaft (6) of the extracting member (8) and/or the rotating shaft (6) of the driving device (7) and the drafting device roller (4) The rotation axis (6) of at least one of them extends vertically. A spinning pre-spinning machine according to claim 1, wherein the driving device (7) is a separate driving device. The spinning pre-spinning machine according to claim 1, wherein the rotating shaft (6) of the extracting member (8) and/or the rotating shaft (6) of the driving device (7) are in the spinning machine (1) In the top view, it extends in the transport direction (T) or at an angle to the transport direction (T), wherein the absolute value of the angle is between 0° and 20°. A spinning pre-spinning machine as described in claim 7 wherein the absolute value of the angle is between 0° and 15°. A spinning pre-spinning machine as described in claim 7 wherein the absolute value of the angle is between 0° and 10°. A spinning pre-spinning machine according to the first aspect of the invention, wherein the rotating shaft (6) of the driving device (7) and the rotating shaft (6) of the extracting member (8) extend parallel or collinearly with each other. A spinning pre-spinning machine according to the first aspect of the invention, wherein the extracting element (8) is one of two extraction discs (9) of the extracting device (5). A spinning pre-spinning machine according to claim 1, wherein a compactor (10) is arranged between the drafting device (2) and the extraction device (5) for pressing in the conveying direction (T) A fiber woven material (15) which is withdrawn from the drafting device (2) and which is drawn by means of the drafting device (2), wherein the extraction element (8) is constructed as a component of the compactor (10). A spinning pre-spinning machine according to claim 1, wherein the withdrawing member (8) is configured to extract a disc (9), and the extracting device (5) includes another one in addition to the extracting disc (9) The disc (9) is withdrawn and the two withdrawal discs (9) preferably form a common slit which forms a through opening (19) of the compactor (10). A spinning pre-spinning machine according to claim 13 wherein the through opening (19) forms an output of the compactor (10), preferably arranged in the transport direction (T) after the input end (20) ( twenty one). A spinning pre-spinning machine according to claim 13 or 14, wherein the two extraction discs (9) have respective regions that are facing toward the respective adjacent extraction discs (9) and each one is pulled back adjacent to each other. The area of the disc (9), wherein the areas facing away from the respective adjacent extraction discs (9) respectively transition into the surface segments of the compactor (10). A spinning pre-spinning machine as claimed in claim 13 or 14, wherein the extraction disc (9) forms a bottom region (14) and/or a side wall region (13) of the compactor (10), wherein the compression is performed The device (10) is preferably and at least partially configured in a funnel shape. A spinning pre-spinning machine according to claim 1, wherein the pre-spinning spinning machine (1) has a sensor (11) disposed in a conveying direction (T) in a region behind the drafting device (2) For determining the speed of the fiber web (15) passing through the region during operation of the spinning machine (1) prior to spinning. The spinning pre-spinning machine according to claim 1, further comprising a control unit (12), The control unit (12) is configured to vary the rotational speed of the drive (7) according to the signal of the sensor (11).