CN111411428B - Stretching device of spinning machine - Google Patents

Abstract

A drawing device (1) for spinning machines, comprising a pair of rollers (2, 3, 4) intermediate to which at least one composite fibre material (5) can be drawn, and an oscillating device (6) comprising an oscillating element (7) able to oscillate in its axial direction (X) with respect to the pair of rollers, and at least one yarn guide (8) which allows the oscillation of at least one composite fibre material by the oscillation of the yarn guide; the stretching device also comprises a pressing device (9) and at least one bracket (23, 24). In the invention, the oscillating element is arranged on the at least one support in such a way that the at least one thread guide is moved in the axial direction (X) relative to the oscillating element by an oscillating movement on the at least one support, so that the at least one thread guide (8) is aligned in the axial direction (X) relative to the pressing device (9).

Description

Drawing device for spinning machine

technical field

The invention relates to a stretching device (Streckwerk) for a spinning machine, which is equipped with a pair of rollers (Walzenpaare), between which at least one composite fiber material (Faserverbund) can pass and stretch; the stretching device Also equipped with an oscillating device (Changiervorrichtung), which contains an oscillating element (Changierelement) and at least one thread guide (Faserführer), wherein at least one thread guide can guide the composite fiber material assigned to the thread guide, the oscillating element is opposite For the roller pair, oscillating in its axial direction, at least one thread guide is arranged on the oscillating element, so that at least one composite fiber material is oscillated by the oscillating movement of the thread guide to which the composite fiber material is assigned; the The stretching device is also equipped with a compacting device, which compacts the composite fiber material stretched from the roller pair; the stretching device is also equipped with at least one bracket, at least used to place the roller pair, the oscillating device and/or Compression device.

Background technique

DE 10 2015 117 938 A1 discloses a stretching device for a textile machine comprising a pair of rollers for stretching a composite fiber material. In addition, the stretching device includes a compression device for compressing the stretched composite fiber material. In addition, an oscillating device (Changiervorrichtung) is used to make the composite fiber material and the pair of rollers move relative to each other. The disadvantage of this stretching device is that it may be troublesome to position the yarn guide of the oscillating device relative to the pressing device.

Contents of the invention

The object of the invention is to improve the prior art. The purpose of this invention can be achieved by the stretching device in the following technical scheme.

Preferably, the stretching device for a spinning machine of the present invention includes a pair of rollers, at least one composite fiber material can be led out and stretched in the middle of the pair of rollers. With the aid of a pair of rollers, the composite fiber material is drawn and homogenized. The roller pair has an axial direction around which it can rotate. The axial direction of the roller pair is preferably the pull-out direction of the stretching device.

In addition, the above-mentioned stretching device is also provided with an oscillating device comprising an oscillating element and at least one yarn guide. The at least one thread guide can guide the composite fiber material assigned to the thread guide. When there are a plurality of yarn carriers and composite fiber materials, one yarn carrier dispenses one composite fiber material.

In order to prevent the composite fiber material from cutting into the pair of rollers, thereby prolonging the service life of the pair of rollers, the oscillating element performs an oscillating motion relative to the pair of rollers along its axial direction. At least one yarn guide is mounted on the oscillating element, so that, by means of the yarn guide, the composite fiber material also oscillates in its axial direction relative to the pair of rollers. Thus, what the roller pair loses in this process is not a concentrated small area, but a relatively large area associated with the oscillatory motion.

Likewise, the stretching device of the present invention is also provided with a compression device, by which the composite fiber material stretched from the rollers can be compressed. The composite fiber material is compacted, making it stronger.

In addition, the stretching device of the present invention is also provided with at least one bracket on which at least a pair of rollers is installed. Additionally or alternatively, an oscillating device can also be mounted on at least one support. Additionally or alternatively, a hold-down device can also be mounted on at least one support. It is also possible to mount parts of the above units on a single stand.

According to the invention, the oscillating device is arranged on a support, on which at least one thread guide moves axially relative to the oscillating element following the oscillating movement. In this way, the at least one thread guide can be axially aligned with respect to the hold-down device. For example, by means of an oscillating movement, at least one thread guide can be pushed against the support and moved on the support while the oscillating movement is not stopped. The yarn guide itself may simply move relative to the oscillating element. The support pushes the yarn guide towards the oscillating element until the direction of the oscillating movement changes and the yarn guide moves away from the support again. For example, the oscillating device and/or the oscillating element are installed on the support at intervals in the axial direction, so that at least a part of the oscillating device can be pushed to move on the support through the oscillating motion.

Since the stent itself is immobile or fixed, the stent is best used as a spatial reference point in the tensile setup, especially in the axial direction. For the support, the yarn guides and thus the composite fiber material are also axially aligned so that the stretching device can process the composite fiber material in an advantageous manner. Thus, at least one thread guide is axially aligned relative to the compacting device, thereby also aligning the composite fiber material with the compacting device.

If the yarn guide is misaligned, eg with the hold-down, the position of the yarn guide and thus the composite fiber material must be corrected. For example, thermal expansion and contraction of the oscillating element may cause at least one thread guide mounted on the oscillating element to move axially such that it is no longer aligned with the hold-down device. However, if thermal expansion causes at least one yarn guide to move axially, this runs through the entire oscillating movement of the at least one support and will also move relative to the oscillating element during the subsequent oscillating movement. In this case, the yarn guide is not aligned with the hold-down, and the displacement is wrong and needs to be calibrated.

Such a design is advantageous in that at least one thread guide is mounted on the oscillating element, which transmits the oscillating motion to the distributed composite fiber material, which, when resting on at least one support, can Axial movement for calibration. Thus, at least one thread guide is arranged on the oscillating element in such a way that an axial oscillating movement can be transmitted to the at least one composite fiber material. On the one hand, at least one yarn guide is not loosely connected to the oscillating element, so that the at least one yarn guide moves the composite fiber material towards the oscillating element; on the other hand, at least one yarn guide is not firmly connected to the oscillating element, otherwise When it is stranded on the support, the composite fiber material cannot be moved towards the oscillating element by an oscillating motion.

It is advantageous if the hold-down device is provided with a suction tube (Saugrohr) with at least one suction groove (Saugschlitz). There is a vacuum inside the straw. If the composite fiber material passes through the suction groove, the composite fiber material is sucked and compacted. In addition, the suction groove is inclined to the running direction of the composite fiber material, so that the composite fiber material can be sucked into the suction groove in a wide area. In this way, when the composite fiber material vibrates, the composite fiber material will also be sucked into the suction groove. Of course, the composite fiber material must be aligned with the suction slot, since the composite fiber material will be next to the suction slot at least occasionally during oscillation. It is also advantageous that at least one yarn guide is aligned with the suction slot.

It is advantageous if the suction tube is fixed at least axially on the support. In this way, the suction tube remains fixed to the at least one support so that when the at least one yarn guide is aligned with the support, the yarn guide is also automatically aligned with the suction tube and with at least one of the suction slots. Thus, at least one yarn guide can be aligned with its assigned suction slot.

Such a design is advantageous in that the stretching device has a plurality, in particular eight, of yarn guides, wherein each yarn guide is assigned a composite fiber material, and preferably the suction tube is provided for each composite fiber material. A suction slot is allocated. The number of yarn guides, the number of composite fiber materials and the number of suction slots is always the same. Each yarn guide leads out a composite fiber material, which passes through the suction groove. The suction groove can also be replaced by other compression elements, such as a compression funnel. With the aid of several yarn guides, several composite fiber materials can be processed simultaneously. The advantages of such a stretching device were also generally described above. For example, the length of the roller pair is designed so that eight composite fiber materials can be stretched simultaneously. In this way, the length of the straw is also determined by design.

If the stretching device is equipped with several thread guides, the distance between them corresponds to the distance between the suction slots and/or other pressing elements.

It is advantageous if at least one yarn guide is arranged on a guide rail which in turn is arranged on the oscillating element. At least one yarn guide can also be arranged on the guide rail. The guide rail and at least one yarn guide (ie a plurality of yarn guides) can be mounted on the oscillating element as a unit and detached as a unit. The guide rail and the oscillating element may be parallel to each other.

Preferably, at least one thread guide and/or guide rail is arranged on the oscillating element via at least one connecting element. The at least one thread guide and/or guide rail can also be spaced apart from the oscillating element by means of the connecting piece.

Such a design is advantageous, by means of the adjusting device, the fastening strength of at least one thread guide on the guide rail can be adjusted, and/or the fastening strength of the guide rail on the oscillating element can be adjusted, and/or the at least one thread guide can be adjusted The fastening strength of the device on the oscillating element. The adjusting device can be arranged on the thread guide, on the connecting piece, on the guide rail and/or on the oscillating element. For example, the adjustment means may comprise threaded screws, the tightening of which increases the fastening strength between the guide rail and the oscillating element. In this way, the guide rail provided with at least one thread guide is difficult to move relative to the oscillating element. Here, the fastening strength between the guide rail and the oscillating element does not need to be too strong, as long as the guide rail does not displace with the support on the oscillating element, so as to calibrate the yarn guide. However, the aforementioned fastening strength must not be too weak, otherwise the thread guide cannot transfer the oscillating motion to the composite fiber material. However, during operation or during the adjustment phase of the tensioning device, the correct fastening strength can be easily found by means of the adjustment device.

It is advantageous if at least one yarn guide is fixedly arranged on a guide rail which is axially movable relative to the oscillating element. The spatial relationship between the at least one yarn guide and the guide rail remains fixed such that the guide rail only needs to move on the support to bring the at least one yarn guide into alignment. This way has special advantages, multiple yarn guides are arranged on the guide rail, and all the yarn guides can be aligned at the same time.

It is advantageous if the connection between the connecting piece and the oscillating element and/or the guide rail and/or the thread guide is realized by a sliding clutch. The slip clutch is designed such that the composite fiber material in at least one thread guide cannot be displaced relative to the oscillating element during oscillation. However, at least one thread guide is displaced relative to the oscillating element by the support.

It is advantageous if the connecting part is arranged on the oscillating element and/or on the guide rail by means of at least one spring element. By means of at least one spring element, the connecting element can be pressed against the oscillating element and/or the guide rail. Preferably, the spring strength is selected such that the yarn guides on the support are aligned, but the composite fiber material of the yarn guides is not axially displaced during oscillation.

It is advantageous that the oscillating element is axially displaceable relative to the at least one support. For example, the oscillating element is mounted with at least one support in its radial direction, but the oscillating element can move freely in the axial direction relative to the support. For example, the support has a floating bearing (Loslager) for mounting the oscillating element, so that the oscillating element can move in the axial direction, but cannot move in the radial direction.

Preferably, the stretching device is provided with a first bracket and a second bracket axially spaced therefrom. In this way, the parts of the stretching device are placed at two points so that they cannot rotate. Preferably, a pair of rollers, an oscillating device and/or a pressing device, in particular a straw, are mounted between the two supports. Thus, the two brackets confine the stretching device between two axial faces. The space formed by the opposing sides of the two supports is the mounting area or punching area (Stanzenfeld) for the tensioning device.

Such a design is advantageous, the sum of the length of the guide rail and the oscillating stroke length of the oscillating motion corresponds to the bearing center distance (Lagerabstand) of the two opposite inner surfaces of the two supports. An oscillatory stroke corresponds to the movement of the oscillatory motion between two reentry points. The length of the oscillatory stroke is simply the distance between the two turning points of the oscillatory motion. When at least one thread guide is aligned with the hold-down device, the guide rail alternately strikes the inner sides of the two supports by means of an oscillating movement. Conversely, when at least one thread guide is not aligned with the hold-down device, the guide rail is displaced by the position of the two supports relative to the oscillating element until the thread guides are re-aligned.

Such a design is advantageous. At the middle position of the suction groove where the composite fiber material is distributed, the first distance between the first end point of the guide rail and the corresponding first bracket is half of the oscillation stroke. It may be supplemented or replaced that, at the middle position of the suction slot where the composite fiber material is distributed, the second distance between the second end point of the guide rail and its corresponding second bracket is also half of the oscillation stroke. The middle position of the composite fiber material is exactly the middle position of the axial going of the suction groove.

It is advantageous to have a fork element with an axial groove mounted on at least one of the brackets, at the end of the guide rail facing the fork element a plug is installed, which protrudes into the groove and can be moved in the groove during oscillating operation. Move in the slot. In this way, at least one thread guide can be accurately aligned with the hold-down device.

It is advantageous if the width of the axial groove corresponds to the sum of the oscillating stroke length of the oscillating movement and the plug width of the plug. The two return points of the oscillating movement are thus the two inner sides of the groove. The emboli hit alternately at the two medial reentry points.

Next, the advantages of the present invention will be further introduced through specific embodiments.

Description of drawings

Fig. 1 is the side view of spinning machine stretching device;

Figure 2 is a top view of a stretching device with two composite fiber materials;

Fig. 3 is a partial top view of a stretching device with two composite fiber materials and two supports;

Fig. 4 is a schematic diagram of the stretching device, a fork element is arranged on the support, and a plug is installed on the guide rail;

Figure 5a is a cross-sectional view showing an oscillatory element with associated rails;

Figure 5b is a cross-sectional view of the oscillatory element showing its connection to the guide rail.

Detailed ways

Figure 1 shows a side view of a stretching device 1 of a spinning machine. The stretching device 1 includes a pair of rollers 2, 3, 4, and a composite fiber material 5 passes through the middle of the pair of rollers, and the stretching device stretches and processes the composite fiber material 5. After the roller pairs 2, 3, 4 run, the composite fiber material 5 is stretched out by the stretching device 1 along the running direction LR. Due to the speed difference of the roller pairs 2 , 3 , 4 in the running direction LR, the composite fiber material 5 is stretched and deformed so that the composite fiber material 5 is homogenized.

The stretching device 1 is equipped with an oscillating device 6 which oscillates the composite fiber material 5 in the axial direction X of the roller pairs 2 , 3 , 4 not shown here. As a result, the working contact surfaces of the roller pairs 2 , 3 , 4 are widened so that cutting of the composite fiber material 5 into the roller pairs 2 , 3 , 4 is avoided.

The oscillating device 6 is equipped with an oscillating element 7 not shown here (see the figure below) and at least one thread guide 8 . The yarn guide 8 feeds the composite fiber material 5 into the stretching device 1 so that it runs between the roller pairs 2, 3, 4. By means of at least one thread guide 8, the composite fiber material 5 also starts an oscillating movement. For example, the yarn guide 8 can be a funnel, and the yarn guide 8 can guide the composite fiber material 5 along the cross-sectional direction (transverse direction) of the composite fiber material 5 .

In this specific embodiment, along the running direction LR of the composite fiber material 5 , a pressing device 9 is installed behind the pair of rollers 2 , 3 , 4 . By means of the compacting device 9, the composite fiber material 5 is compacted to give it a higher strength.

In addition, in this specific embodiment, the pressing device 9 has a suction pipe 10, and at least one suction groove 11 is formed on the suction pipe 10. There is a vacuum in the suction pipe 10, and when the composite fiber material 5 passes through the suction groove 11, it is sucked into the suction groove and compacted.

In the running direction LR of the composite fiber material 5 , a spinning unit 12 is arranged behind the hold-down device 9 , which winds the yarn emerging from the composite fiber material 5 onto a bobbin 13 . In this specific embodiment, the spinning unit 12 is a rotating body, but it can also be other types of spinning units.

According to this embodiment, the stretching device 1 is equipped with a pair of belts, comprising an upper belt 14 and a lower belt 15 . In addition, the upper belt 14 is reversed by a diverting unit 16 . The lower belt 15 is turned by a turn table 17 and a turn bar 18. According to this specific embodiment, a belt set is installed between the first pair of rollers 2 and the second pair of rollers 3 . In addition or as an alternative, the belt set can also be mounted behind the third roller set 4 in the running direction LR of the composite fiber material 5 .

Furthermore, generally speaking, it is the lower rollers 2 b , 3 b , 4 b of the roller pairs 2 , 3 , 4 that are driven such that the composite fiber material 5 is stretched by the stretching device 1 . The upper roller 2a, 3a, 4a of the roller pair 2, 3, 4 is not driven, it is located above the lower roller 2b, 3b, 4b, rotates with them and is compressed.

The stretching device 1 is also provided with a clamping roller 19 which in this particular embodiment presses the composite fiber material 5 onto the straw 10 as shown.

In this specific embodiment, the upper belt 14 is installed around the upper roller 3 a of the second pair of rollers 3 , and the lower belt 15 is installed around the lower roller 3 b of the second pair of rollers 3 .

The stretching device 1 also includes a pressure arm 20 on which, in this specific embodiment, the upper rollers 2a, 3a, 4a and the pinch rollers 19 are mounted. The pressure arm 20 can be taken out by swinging upward relative to the lower rollers 2b, 3b, 4b, so as to replace parts or put the composite fiber material 5 into the stretching device 1 . If parts are replaced or fiber composite material 5 is inserted, the pressure arm 20 can be swung downward again so that the upper rollers 2a, 3a, 4a are fixed on the lower rollers 2b, 3b, 4b.

In the illustrations that follow, parts of the same type and/or function, or even parts of comparable type and function, are identified with the same designation as compared to the diagrams presented above. If it is not specifically introduced again in the subsequent specific implementation examples or illustrations, it means that its design and/or function are consistent with the design and functional features previously described in other specific implementation examples.

Fig. 2 shows a partial plan view of the stretching device 1, as shown in the figure, this part can stretch at least two composite fiber materials 5a, 5b. However, the stretching device 1 can only twist one composite fiber material 5 .

In addition, the stretching device 1 of the present embodiment is opened. This means that the pressure arm 20 is swung off the lower rollers 2b, 3b, 4b. Thus, Figure 2 presents a view on the lower rollers 2b, 3b, 4b on which the composite fiber material 5a, 5b is located.

The lower rollers 2b, 3b, 4b, preferably also the upper rollers 2a, 3a, 4a described here and the clamping rollers 19 can axially cover the entire stretching device 1 . Thus, the stretching device 1 has only one lower roller 2 b , 3 b , 4 b , upper roller 2 a , 3 a , 4 a and clamping roller 19 . The stretching device 1 can also expand a plurality of composite fiber materials 5 simultaneously. The design advantage of this stretching device 1 is that it means that the length of the axial direction X is so long that eight composite fiber materials 5 can be stretched. Certainly also need 8 yarn guides 8, 8 lower belts 15, 8 upper belts 14, 8 suction slots 11 and 8 spinning bobbins 12.

In this particular embodiment, the oscillating device 6 is provided with an oscillating element 7 on which wire guides 8a, 8b are mounted. The oscillatory element 7 can be driven by a driver not described here. The oscillating element 7 performs an oscillating movement CB, which has the advantage that this movement is parallel to the axis X of the roller pair 2 , 3 , 4 . The oscillatory motion CB is a back and forth motion. Through the oscillating motion CB of the yarn guides 8a, 8b, the distributed composite fiber materials 5a, 5b oscillate together, so that the composite fiber materials 5a, 5b run in the middle of the roller pair in a relatively wide range, thereby avoiding the composite fiber materials. 5a, 5b cut into rollers 2a, 2b, 3a, 3b, 4a, 4b of roller pairs 2, 3, 4.

The oscillating movement CB additionally has a first return point 21 and a second return point 22 . The distance between the two return points 21 , 22 is the oscillation stroke CH or the oscillation stroke length CH. For the sake of clarity, only the turning points 21, 22 and the oscillation stroke CH on the composite fiber material 5a are shown. The composite fiber material 5 a , 5 b oscillates back and forth between the two return points 21 , 22 .

The suction grooves 11a, 11b each have a middle point M which passes through the center of the axial direction X of the suction grooves 11a, 11b. When the turning points 21, 22 are at the same distance from the middle position M of the suction grooves 11a, 11b in the axial direction X, the composite fiber material 5a, 5b and its associated suction grooves 11a, 11b are optimally aligned. The composite fiber material 5a, 5b then oscillates uniformly, ie about the middle position M at the same distance from both sides. As a result, an optimal alignment of the composite fiber material 5a, 5b with its assigned suction groove 11a, 11b is achieved, that is to say, if the composite fiber material 5a, 5b oscillates around the middle position M of the suction groove 11a, 11b, it is ensured that the During the oscillation of the composite fiber materials 5a, 5b, they are always in the suction grooves 11a, 11b. In particular, the composite fiber material 5a, 5b does not oscillate in the area next to the suction grooves 11a, 11b.

However, due to the thermal expansion of the oscillating element 7, the thread guides 8a, 8b may move axially, so that these elements are no longer optimally aligned with the hold-down device 9, especially the suction slots 11a, 11b. The composite fiber material 5a, 5b no longer oscillates uniformly in the middle of the suction slots 11a, 11b. In particular, one of the two reentry points 21 , 22 may be located next to the suction groove 11 a , 11 b in the axial direction X, with the disadvantage that the composite fiber material 5 a , 5 b is no longer compacted.

Another disadvantage is that the yarn guides 8a, 8b must be installed relatively precisely in the axial direction X, which increases the difficulty in assembly.

Figure 3 shows a part of a stretching device 1 with two composite fiber materials 5a, 5b and in this embodiment also two supports 23, 24. The stretching device 1 can also only be equipped with one of the supports 23,24.

In the illustrations that follow, parts of the same type and/or function, or even parts of comparable type and function, are identified with the same designation as compared to the diagrams presented above. If it is not specifically introduced again in the subsequent specific implementation examples or illustrations, it means that its design and/or function are consistent with the design and functional features previously described in other specific implementation examples. Furthermore, for simplicity, only notations that are important for understanding are given.

The oscillating device 6 is mounted on at least one support 23, 24, and at least one yarn guide 8a, 8b is movable relative to the oscillating element 7 in the axial direction X on the at least one support 23, 24 by an oscillating motion CB, so that at least one guide The yarn holders 8a, 8b can be aligned with the pressing device 9 in the axial direction X. According to this particular embodiment, at least one thread guide 8a, 8b is aligned with the assigned suction slot 11a, 11b. This has the advantage that the composite fiber material 5a, 5b always oscillates uniformly around the midpoint M of the suction groove 11a, 11b. If the composite fiber material 5a, 5b oscillates uniformly around the midpoint M of the suction groove 11a, 11b, the distances from the midpoint M to the two return points 21, 22 are equal.

The lower rollers 2b, 3b, 4b on the two supports 23, 24 in this specific embodiment are rotatable. In addition or as an alternative, the suction tube 10 of the pressing device 6 is mounted on supports 23 , 24 . The suction grooves 11 a , 11 b of the suction pipe 10 are thus kept at a certain distance from the brackets 23 , 24 . The supports 23 , 24 thus serve as reference points for the stretching device 1 .

Both supports 23 , 24 each have a floating bearing 32 , 33 , so that the oscillating element 7 is free to move in the axial direction X, but radially the oscillating element 7 is guided into the floating bearing 32 , 33 . For example, two floating bearings 32 , 33 may serve as holes in the brackets 23 , 24 . The frictional resistance between the oscillating element 7 and the two floating bearings 32, 33 should not be too high, so that the oscillating element 7 can oscillate with slight forces, especially tensile forces.

In addition, the inner sides 30, 31 of the two brackets 23, 24 are opposite. In addition, a certain distance A is maintained between the inner sides 30 , 31 of the two brackets 23 , 24 . Thus, the bracket distance A is the distance between the two brackets 23 , 24 .

According to this particular embodiment, the oscillating device 6 is provided with a guide rail 25 on which at least one thread guide 5a, 5b is mounted.

Additionally, the rail 25 has a first end point 28 and a second end point 29 . The first end point 28 faces the first bracket 23 and the second end point 29 faces the second bracket 24 .

The guide rail 25 is mounted on the oscillating element 7 via at least one connecting piece 26 , 27 . In this specific embodiment, the guide rail 25 is mounted on the vibrating element 7 via two connecting pieces 26 , 27 . As a result, the guide rail 25 does not rotate unnecessarily against the oscillating element 7 .

According to this particular embodiment, the yarn guides 8a, 8b are aligned with the suction grooves 11a, 11b. The yarn guides 8a, 8b oscillate at equal distances around the middle position M of the suction grooves 11a, 11b to both sides. This means that both return points 21 , 22 of the oscillating movement CB are at the same distance from the central position M. Thus, the distance between the return points 21 , 22 and the intermediate position M is half the oscillation stroke CH or its length.

The length of the guide rail 25 in the axial direction X is L. There is preferably a certain relationship between the distance A between the supports 23 and 24 , the distance of the oscillation stroke CH and the length L of the guide rail 25 . This has the advantage that the sum of the length L of the guide rail 25 and the oscillation stroke length CH is equal to the support distance A of the supports 23 , 24 .

If the above relationship applies, the first end point 28 of the guide rail 25 hits the first inner side 30 of the first bracket 23 during the oscillatory motion CB and when the composite fiber material 5a, 5b is located at the first turning point 21 . On the contrary, during the oscillating motion CB, and when the composite fiber material 5 a , 5 b is at the second turning point 22 , the second end point 29 of the guide rail 25 hits the second inner side 31 of the second bracket 24 .

If the thread guides 8a, 8b oscillate precisely around the midpoint M, there is a first distance A1 between the first end point 28 of the guide rail 25 and the first inner side 30 of the first support 23 . The first distance A1 is half the oscillation stroke CH or half the distance of the oscillation stroke CH.

If the yarn guides 8a, 8b oscillate precisely around the midpoint M, the distance between the second end point 29 of the guide rail 25 and the second inner side 31 of the second support 24 is the distance A2. The second distance A2 is half the oscillation stroke CH or half the distance of the oscillation stroke CH.

If the yarn guide 8a, 8b is aligned with the pressing device 9, particularly the suction groove 11a, 11b, then the two distances A1 and A2 is the same.

For example, if the oscillating elements 7 are now expanded or pulled together due to thermal expansion, the thread guides 8a, 8b are displaced in the axial direction X relative to the hold-down device 9 . The yarn guides 8a, 8b can be moved in the direction of the first support 23 or the direction of the second support 24 . A return point 21, 22 will leave the central position M. In the worst case, one of the two return points 21, 22 is displaced beside the suction groove 11a, 11b.

For example, if the first distance A1 is less than the second distance A2, due to thermal expansion, the guide rail 25 is displaced towards the first bracket 23, the first end point 28 of the guide rail 25 hits the first inner side 30 of the first bracket 23 through an oscillating motion CB, However, the oscillating movement CB has not yet reached the first reentry point 21 . After the impact, the oscillatory motion CB continues in the corresponding direction. However, an inventive idea of the invention is that, in this particular embodiment, when the guide rail 25 is waiting on the first inner side 30 of the first bracket 23, the guide rail 25 moves towards the oscillating element 7 in the axial direction X, this movement will This takes place until the oscillatory movement CB reaches the first turning point 21 and moves away from the first bracket 23 again. With the oscillating movement CB, the guide rail 25 is moved towards the second support 24 until the oscillating movement CB reaches the second return point 22 . At this time, the second end point 29 of the guide rail 25 hits the second inner side 31 of the second bracket 24 . Furthermore, the rail 25 can be aligned with the second inner side 31 if the second end point 29 has not yet reached the second return point 22 of the oscillatory motion CB after impinging on the second inner side 31 .

FIG. 4 shows yet another specific embodiment of the stretching device 1 , the fork element 34 of which is mounted on a support 24 , here the second support 24 , and the plug 36 mounted on the guide rail 25 .

A fork element 34 is mounted on the inner side 31 of the second bracket 24 and extends axially X therefrom. In addition, the fork element 34 also has an axial groove 35 limited in the axial direction X by two detent points 37 , 38 .

In addition, the guide rail 25 is provided with a plug 36 which protrudes into the recess 35 and is arranged in particular between the two detent points 37 , 38 . The plug 36 is mounted at the second end point 29 of the guide rail 25 in this embodiment.

The advantage is that the width B of the groove 35 in the axial direction X corresponds to the sum of the plug width 36 of the plug 36 in the axial direction X and the length of the oscillation stroke CH. Thus, if the thread guide 8 is aligned with the suction groove 11, the stopper 36 hits the braking points 37, 38 at the return points 21, 22 of the oscillating movement CB. On the other hand, if the yarn guide 8 is not aligned with the suction groove 11, the stopper 36 hits the detent points 37, 38 without reaching the respective return points 21, 22. After hitting the braking points 37, 38, the guide rail 25 continues to move towards the oscillating element 7 until the yarn guide 8 is aligned with the suction groove 11 again.

FIG. 5 a shows a cross-section of the oscillatory element 7 with coupled guide rails 25 . The guide rail 25 is connected to the oscillatory element 7 by means of connections 26, 27 (see Figs. 3, 4). The connection pieces 26 , 27 comprise in this particular embodiment a handle 39 mounted to the oscillatory element 7 by means of screws 41 . Therefore, the connection between the handle 39 and the oscillating element 7 is firm. The link 26 , 27 also includes a spring element 40 which allows the guide rail 25 to move in the axial direction X towards the handle 39 .

However, the strength requirement of the spring element 40 is that when the composite fiber material 5 in the yarn guide 8 oscillates, the guide rail 25 does not displace towards the handle 39 and thus towards the oscillating element 7 . On the other hand, the suitable strength of the spring element 40 should be such that the guide rail 25 can move on at least one support 23 , 24 to bring the yarn guide 8 into alignment with the hold-down device 9 . The spring element 40 in this specific embodiment presses the guide rail 25 onto the handle 39 from the inside. The configuration of the spring element 40 presses the guide rail 25 away from the oscillating element 7 .

For example, the spring element 40 may be a leaf spring or a helical spring. The spring element 40 can also be an elastomer.

The handle 39 or at least the surface to which the guide rail 25 is attached is preferably made of wear-resistant plastic, so that when the guide rail 25 is moved, the handle 39 does not wear out.

FIG. 5 b shows another specific embodiment of the connection of the guide rail 25 on the oscillating element 7 . In this specific embodiment, the spring element 40 is a leaf spring, and is fixedly mounted on the oscillating element 7 through a screw rod 41 . The spring element 40 presses the guide rail 25 against the oscillating element 7 . A stop 42 is installed between the guide rail 25 and the oscillating element 7 .

The present invention is not limited to the examples of the above-mentioned several specific embodiments. Changes and combinations within the scope of the patent requirements are the relevant contents of the present invention, and the present invention is also included in the above-mentioned examples of specific embodiments that are not mentioned or in specific embodiments. Individually marked.

reference sign

1 stretching device

2 The first roller group

2a upper roller

2b lower roller

3 The second roller group

3a upper roller

3b lower roller

4 The third roller group

4a upper roller

4b lower roller

5 Composite fiber materials

6 Oscillating device

7 Oscillating elements

8 yarn guide

9 pressing device

10 straws

11 suction slot

12 spinning unit

13 spinning bobbin

14 upper belt

15 lower belt

16 steering unit

17 Steering table

18 steering rod

19 clamping roller

20 pressure arm

21 The first turning point

22 Second turning point

23 The first bracket

24 Second bracket

25 guide rail

26 The first connecting piece

27 The second connecting piece

28 first endpoint

29 second endpoint

30 first medial

31 second medial

32 The first floating bearing

33 Second floating bearing

34 fork element

35 Groove

36 embolism

37 The first braking point

38 Second braking point

39 handle

40 spring element

41 screw

42 block

LR running direction

CB Oscillating motion

X axis

CH Radial

M Midpoint

A Bracket distance

A1 first distance

A2 Second distance

L length

B width

Z embolism width

Claims (16)

1. A stretching device (1) for a spinning machine comprising: A pair of rollers (2,3,4), wherein at least one composite fiber material (5) can pass through and stretch it; Oscillating device (6), which further comprises an oscillating element (7) and at least one yarn guide (8), wherein said at least one yarn guide (8) is capable of guiding the composite fiber assigned to the yarn guide (8) material (5), the oscillating element (7) can oscillate in its axial direction (X) relative to the pair of rollers (2, 3, 4) during the oscillating motion; wherein, at least one of the the yarn guide (8) is arranged on the oscillating element (7) such that said at least one composite fiber material (5) is oscillated by the oscillatory movement of the yarn guide (8) to which the composite fiber material (5) is distributed; A compacting device (9), by which the composite fiber material (5) stretched from the pair of rollers (2,3,4) is compacted; and At least one support (23, 24), on which at least the pair of rollers (2, 3, 4), the oscillating device (6) and/or the pressing device (9) are placed; It is characterized in that, The oscillating device (6) is arranged on the at least one support (23, 24) in such a way that the at least one yarn guide (8) collides with the at least one support (23, 24) through an oscillating motion. ) so as to move in the axial direction (X) relative to the oscillating element (7), so that the at least one yarn guide (8) moves in the axial direction (X) relative to the pressing device (9) Align top. 2. The stretching device according to claim 1, characterized in that said at least one thread guide (8) is arranged on said oscillating element (7) in such a way that said at least one thread guide (8) ) is capable of transferring an oscillating motion to the composite fiber material (5) to which it is assigned, and is capable of moving axially on said at least one support (23, 24) for alignment when stranded. 3. The stretching device according to claim 1, characterized in that, said pressing device (9) comprises a straw (10), which has at least one suction groove (11), wherein said at least one A suction slot (11) is assigned the composite fiber material (5), through which the stretched composite fiber material (5) is compacted, and/or said suction tube (10) is at least axially (X ) is fixed on the brackets (23, 24), and said at least one yarn guide (8) can be aligned with the assigned suction groove (11). 4. The stretching device according to claim 3, characterized in that, the stretching device (1) has a plurality of yarn guides (8), wherein each yarn guide (8) is assigned a Composite fiber material (5); said suction pipe (10) configures a suction groove (11) for each composite fiber material (5). 5. The stretching device according to any one of claims 1-4, characterized in that, said at least one yarn guide (8) is arranged on a guide rail (25), which in turn is arranged on said oscillating element ( 7) above; the oscillating element (7) and the guide rail (25) are parallel to each other. 6. The stretching device according to claim 5, characterized in that, said at least one yarn guide (8) and/or said guide rail (25) is arranged on the on the oscillating element (7). 7. The stretching device according to claim 5, characterized in that the fastening strength of said at least one yarn guide (8) on said guide rail (25), and/or said guide rail (25) in The fastening strength of said oscillating element (7), and/or the fastening strength of said at least one thread guide (8) on said oscillating element (7), is adjusted by means of a mounting device. 8. The stretching device according to claim 5, characterized in that, said at least one yarn guide (8) is fixedly arranged on said guide rail (25), and said guide rail (25) is relatively Said oscillating element (7) is movable in the axial direction (X). 9. The stretching device as claimed in claim 6, characterized in that the connecting elements (26, 27) and the oscillating element (7) and/or the guide rail (25) and/or the thread guide The connection between the device (8) is realized by a slip clutch. 10. The stretching device according to claim 6, characterized in that, said connecting element (26, 27) is arranged on said oscillating element (7) and/or said on the guide rail (25). 11. The stretching device according to any one of claims 1-4, characterized in that, the oscillating element (7) itself can move relative to the at least one bracket (23, 24) in the axial direction (X). move. 12. The stretching device according to any one of claims 1-4, characterized in that, the stretching device (1) comprises a first bracket (23) and a first bracket (23) spaced apart in the axial direction (X). Two supports (24); between the two supports (23,24), the pair of rollers (2,3,4), the oscillation device (6) and/or the pressing device ( 9). 13. Stretching device according to claim 5, characterized in that the sum of the length (L) of the guide rail (25) and the oscillating stroke length (CH) of the oscillating motion is the same as that of the two supports (23, 24) Corresponding to the bearing center distance (A) between the opposite inner sides of the bearing. 14. The stretching device according to claim 5, characterized in that, at the middle point position (M) of the suction groove (11) assigned by the composite fiber material (5), the first of the guide rails (25) The first distance (A1) between the end point (28) and its corresponding first bracket (23) is half the oscillation stroke length (CH), and/or the second end point (29) of the guide rail (25) ) and the second distance (A2) between the corresponding second support (24) is half of the oscillation stroke length (CH). 15. Stretching device according to claim 5, characterized in that a fork element (34) with an axial (X) groove (35) is provided on said at least one support (23, 24) ; at the end (28, 29) of the guide rail (25) facing the fork element (34) a plug (36) is provided which protrudes into the groove (35) and during an oscillating movement Can move in said groove (35). 16. Stretching device according to claim 15, characterized in that said groove (35) has an axial (X) width (B) corresponding to the oscillation stroke length (CH) of the oscillation movement and the The sum of the axial (X) plug width (Z) of the plug (36).

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