CN111411428A - Stretching device for spinning machine - Google Patents

Abstract

A stretching device (1) for a spinning machine, comprising a pair of rollers (2, 3, 4) capable of stretching at least one composite fiber material (5) in the middle, and an oscillating device (6), the oscillating device further comprising Oscillating element (7) and at least one thread guide (8), wherein the oscillating element can oscillate in its axial direction (X) relative to the roller pair, the at least one thread guide passing at least one composite fiber material through the thread guide The tensioning device further comprises a pressing device (9) and at least one bracket (23, 24). In the present 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 relative to the oscillating element in the axial direction (X) by an oscillating movement on the at least one support, so that the at least one thread guide is The device (8) is aligned in the axial direction (X) with respect to the hold-down device (9).

Description

Stretching device for spinning machine

technical field

The invention relates to a stretching device (Streckwerk) of a spinning machine, which is equipped with a roller pair (Walzenpaare), the middle of which can pass at least one composite fiber material (Faserverbund) and stretch; the stretching device There is also an oscillation device (Changiervorrichtung) comprising an oscillation element (Changierelement) and at least one thread guide (Faserführer), wherein the at least one thread guide can guide the composite fiber material assigned to the thread guide, the oscillation element is opposite. For the roller pair, which can oscillate in its axial direction, at least one yarn guide is arranged on the oscillating element, so that the at least one composite fiber material is oscillated by the oscillatory movement of the yarn guide to which the composite fiber material is distributed; the The stretching device is also equipped with a pressing device, which compacts the composite fiber material after stretching from the roller pair; the stretching device is also equipped with at least one support, at least for holding the roller pair, the oscillation device and/or the 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 the composite fiber material. In addition, the stretching device includes a compression device for compressing the stretched composite fiber material. In addition, through an oscillation device (Changiervorrichtung), the composite fiber material and the roller pair are moved relative to each other. The disadvantage of this stretching device is that the positioning of the yarn guide of the oscillating device relative to the pressing device may be troublesome.

SUMMARY OF THE INVENTION

The object of the present invention is to improve the prior art. This object of the invention can be achieved by the stretching device in the technical solution of the independent claim.

Preferably, the stretching device for a spinning machine of the present invention includes a pair of rollers, and at least one composite fiber material can be drawn out and stretched in the middle of the pair of rollers. With the aid of the roller pair, 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, which includes 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 multiple yarn guides and composite fiber material, one yarn guide distributes one composite fiber material.

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

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

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

According to the invention, the oscillating device is arranged on a support on which the at least one thread guide moves axially relative to the oscillating element with 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 urged to move on the support, and when the oscillating movement is not stopped, it is possible to move on the support. The thread 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 mounted on the support at an axial distance so that at least a part of the oscillating device can be urged to move on the support by the oscillating movement.

Since the stent itself is immovable or fixed, the stent is preferably used as a spatial reference point in the stretching device, especially in the axial direction. For the stent, the yarn guides are axially aligned, and thus the composite fiber material is also axially aligned, so that the stretching device can process the composite fiber material in an advantageous manner. Thus, the at least one thread guide is axially aligned with respect to the hold-down device, thereby also aligning the composite fiber material with the hold-down device.

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

Such a design is advantageous in that at least one thread guide is mounted on the oscillating element, which transmits an oscillating movement to the distributed composite fiber material, which, when it rests on the at least one support, can Axial movement to calibrate. Therefore, the 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, the at least one thread guide is not loosely connected to the oscillating element, so that the at least one thread guide moves the composite fiber material towards the oscillating element through it; When it rests on the support, the composite fiber material cannot be moved towards the oscillating element by the oscillating motion.

It is advantageous if the pressing device is provided with a suction tube (Saugrohr) with at least one suction groove (Saugschlitz). There is a vacuum inside the pipette. If the composite fiber material passes through the suction slot, the composite fiber material is sucked in 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 oscillates, the composite fiber material is also sucked into the suction groove. Of course, the composite fiber material must be aligned with the suction groove, since the composite fiber material will at least occasionally be next to the suction groove during oscillation. It is also advantageous that at least one thread guide is aligned with the suction groove.

Such a design is advantageous in that the drinking straw is at least axially fastened to the holder. In this way, the suction tube remains fixed to the at least one support, so that when the at least one thread guide is aligned with the support, the yarn guide is also automatically aligned with the suction tube and at least one of the suction grooves. Thus, at least one thread guide can be aligned with its assigned suction slot.

Such a design is advantageous in that the stretching device has several, in particular eight thread guides, wherein each thread guide is assigned a composite fiber material, and the suction tube is preferably one for each composite fiber material. A suction slot is assigned. The number of yarn guides, the number of composite fiber materials and the number of suction slots are always the same. Each thread guide leads out a composite fiber material, which is passed through the suction groove. The suction trough can also be replaced with other pressing elements, such as a pressing funnel. With several yarn guides, several composite fiber materials can be processed simultaneously. The advantages of such a stretching device were also generally described earlier. 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 spacing between them corresponds to the spacing between the suction grooves and/or other pressing elements.

It is advantageous if the at least one thread guide is arranged on the guide rail, which in turn is arranged on the oscillating element. At least one thread guide can also be arranged on the guide rail. The guide rail and the at least one yarn guide (ie a plurality of yarn guides) can be mounted on the oscillating element as a whole and disassembled as a whole. 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 in that, by means of the adjustment device, the fastening strength of the 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 Tightening strength of the oscillating element on the oscillating element. The adjustment 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 may increase the strength of the fastening 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 have to be too strong, as long as the guide rail does not displace with the bracket on the oscillating element, so as to calibrate the yarn guide. However, the above-mentioned tightening strength must not be too weak, otherwise the yarn guide will not be able to transfer the oscillating motion to the composite fiber material. However, during the operation of the stretching device or during the adjustment phase, with the aid of the adjustment device, it is easy to find a suitable tightening strength.

Such a design is advantageous in that the at least one thread guide is fixedly arranged on the guide rail, which is axially displaceable relative to the oscillating element. The spatial relationship between the at least one thread guide and the guide rail remains fixed, so that the guide rail only needs to be moved on the bracket to align the at least one thread guide. This method has the special advantage that a plurality of 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 slip clutch. The slip clutch is designed such that, during oscillation, the composite fiber material in at least one of the yarn guides is not displaced relative to the oscillating element. However, at least one yarn guide is displaced relative to the oscillating element by means of the support.

Such a design is advantageous in that the connecting element is arranged on the oscillating element and/or 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 when oscillating, the composite fiber material of the yarn guides is not displaced in the axial direction.

Such a design is advantageous in that the oscillating element is axially movable relative to the at least one support. For example, the oscillating element is mounted with at least one bracket in its radial direction, but the oscillating element is freely movable in the axial direction relative to the bracket. 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 support and a second support axially spaced therefrom. In this way, the parts of the stretching device are positioned at two points so that they cannot rotate. Preferably, a roller pair, an oscillating device and/or a pressing device, in particular a straw, is mounted between the two supports. Thereby, the two brackets confine the stretching device between the two faces in the axial direction. The space formed by the opposite sides of the two brackets is the mounting area or punching area of the stretching device.

Such a design is advantageous in that the sum of the length of the guide rail and the length of the oscillating stroke of the oscillating movement corresponds to the center-to-center distance of the bearings of the two opposite inner surfaces of the two brackets. The oscillatory stroke corresponds to the motion of the oscillatory motion between two reversal points. The length of the oscillating stroke is the distance between the two turning points of the oscillating motion. When the at least one thread guide is aligned with the hold-down device, the guide rails alternately strike the inner sides of the two brackets by means of an oscillating motion. Conversely, when at least one of the thread guides is not aligned with the hold-down device, the guide rails are shifted from the positions of the two brackets to the oscillating element until the thread guides are re-aligned.

Such a design is advantageous, in the middle position of the suction groove to which 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. Additionally or alternatively, the second distance between the second end point of the guide rail and its corresponding second bracket is also half the oscillation stroke at the middle position of the suction groove to which the composite fiber material is distributed. The middle position of the composite fiber material is exactly the middle position of the axial travel of the suction groove.

Such a design is advantageous in that a fork element with an axial groove is mounted on at least one of the brackets, and at the end of the guide rail facing the fork element a plug is mounted, which element projects into the groove and can be recessed during oscillating operation. move in the slot. In this way, the at least one thread guide can be precisely aligned with the hold-down device.

Advantageously, the width of the axial groove corresponds to the sum of the oscillation stroke length of the oscillatory movement and the plug width of the plug. Thus, the two turning points of the oscillatory motion are the two inner sides of the groove. The emboli alternately strike the two medial reentry points.

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

Description of drawings

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

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

Figure 3 is a partial top view of a stretching device with two composite fiber materials and two stents;

Figure 4 is a schematic diagram of the stretching device, the bracket is provided with a fork element, and a plug is installed on the guide rail;

Figure 5a is a cross-sectional view showing the oscillating element and the connected guide rail;

Figure 5b is a cross-sectional view showing the oscillatory element with the guide rail connected.

Detailed ways

Figure 1 shows a side view of a stretching device 1 of a spinning machine. The stretching device 1 includes pairs of rollers 2, 3, and 4. The composite fiber material 5 passes through the middle of the roller pair. The stretching device stretches and processes the composite fiber material 5. After the running of the roller pairs 2, 3, 4, the composite fiber material 5 is stretched out by the stretching device 1 in 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. Therefore, the working contact surface of the roller pairs 2 , 3 , 4 is widened, thereby preventing the composite fiber material 5 from cutting into the roller pairs 2 , 3 , 4 .

The oscillating device 6 is provided with an oscillating element 7 not shown here (see the figure below) and at least one thread guide 8 . The yarn feeder 8 feeds the composite fiber material 5 into the drawing device 1 , making it run between the roller pairs 2 , 3 , 4 . By means of the 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 in the cross-sectional direction (transverse direction) of the composite fiber material 5 .

In this specific embodiment, in the running direction LR of the composite fiber material 5, a pressing device 9 is mounted behind the roller pairs 2, 3, 4. By means of the compacting device 9, the composite fiber material 5 is compacted to have a higher strength.

In addition, in this specific embodiment, the pressing device 9 has a suction pipe 10 , and the suction pipe 10 has at least one suction groove 11 . The inside of the suction pipe 10 is vacuumed, 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 mounted downstream of the hold-down device 9 , which winds the yarn emerging from the composite fiber material 5 onto a bobbin 13 . In this particular embodiment, the spinning unit 12 is a rotating body, but it may also be other types of spinning units.

According to the present embodiment, the stretching device 1 is provided with a pair of belts, including an upper belt 14 and a lower belt 15 . In addition, the upper belt 14 is redirected by the steering unit 16 . The lower belt 15 is turned in direction by the turning table 17 and the turning rod 18 . According to this specific embodiment, a belt set is installed between the first roller pair 2 and the second roller pair 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 2b, 3b, 4b of the roller pairs 2, 3, 4 that are driven so that the composite fiber material 5 is stretched by the stretching device 1 . The upper rollers 2a, 3a, 4a of the roller pairs 2, 3, 4 are not driven, they are located above the lower rollers 2b, 3b, 4b, rotate with them and are compressed.

The stretching device 1 is also equipped with a gripping roller 19 which, in the present embodiment, presses the composite fiber material 5 against the drinking straw 10 as shown.

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

The stretching device 1 also contains a pressure arm 20 on which, in the present embodiment, the upper rollers 2a, 3a, 4a and the clamping roller 19 are mounted. The pressure arm 20 can be swung upwards relative to the lower rollers 2 b , 3 b , 4 b to be taken out in order to exchange parts or to insert the composite fiber material 5 into the stretching device 1 . If a component is replaced or a fiber composite material 5 is inserted, the pressure arm 20 can be swung downwards again, so that the upper rollers 2a, 3a, 4a are fastened to the lower rollers 2b, 3b, 4b.

In the following presentation of the figures, parts of the same type and/or the same function, even those of comparable type and function, are given the same designation as compared to the figures presented above. If it is not specifically described again in the following specific implementation examples or drawings, it means that its design and/or function are consistent with the design and function features that have been introduced in other specific implementation examples before.

Figure 2 shows a plan view of a portion of the stretching device 1, which as shown can stretch at least two composite fiber materials 5a, 5b. However, the stretching device 1 can also twist only 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 rocked off the lower rollers 2b, 3b, 4b. Thus, Figure 2 presents a view on the lower rollers 2b, 3b, 4b, with the composite fiber material 5a, 5b just above the lower rollers.

The lower rollers 2b, 3b, 4b and preferably also the upper rollers 2a, 3a, 4a described here and the clamping rollers 19 can cover the entire stretching device 1 axially. Therefore, the stretching device 1 has only one lower roller 2b, 3b, 4b, upper rollers 2a, 3a, 4a and clamping roller 19. The stretching device 1 can also stretch a plurality of composite fiber materials 5 at the same time. The design advantage of this stretching device 1 is that it means that the length in the axial direction X is so long that 8 composite fiber materials 5 can be stretched. Of course, 8 yarn guides 8, 8 lower belts 15, 8 upper belts 14, 8 suction grooves 11 and 8 spinning drums 12 are also required.

In the present embodiment, the oscillatory device 6 is provided with an oscillatory element 7 on which thread 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, the advantage of which is that this movement is parallel to the axial direction 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 composite fiber materials 5a, 5b distributed by the yarn guides 8a, 8b 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 material. 5a, 5b are cut into the rollers 2a, 2b, 3a, 3b, 4a, 4b of the roller pairs 2, 3, 4.

The oscillating movement CB additionally has a first turning point 21 and a second turning point 22 . The distance between the two turning 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 5a, 5b oscillates back and forth between the two turning points 21, 22.

Each of the suction grooves 11a, 11b has an intermediate point M, which passes through the center of the axial direction X of the suction grooves 11a, 11b. When the turning points 21 and 22 have the same distance from the middle position M of the suction grooves 11a and 11b in the axial direction X, the composite fiber materials 5a and 5b and their assigned suction grooves 11a and 11b can achieve the best alignment effect. The composite fiber material 5a, 5b then oscillates uniformly, ie around the middle position M at the same distance from both sides. Thereby, optimal alignment of the composite fiber materials 5a, 5b with their assigned suction grooves 11a, 11b is achieved, that is, if the composite fiber materials 5a, 5b oscillate around the middle position M of the suction grooves 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 thermal expansion of the oscillating element 7, the yarn guides 8a, 8b may move axially, so that these elements are no longer optimally aligned with the hold-down device 9, especially the suction grooves 11a, 11b. The composite fiber materials 5a, 5b no longer oscillate uniformly in the middle of the suction grooves 11a, 11b. In particular, one of the two turning points 21, 22 may be located next to the suction grooves 11a, 11b in the axial direction X, with the disadvantage that the composite fiber material 5a, 5b is no longer compressed.

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

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

In the following presentation of the figures, parts of the same type and/or the same function, even those of comparable type and function, are given the same designation as compared to the figures presented above. If it is not specifically described again in the following specific implementation examples or drawings, it means that its design and/or function are consistent with the design and function features that have been introduced in other specific implementation examples before. Furthermore, for simplicity, only the 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 thread guide 8a, 8b is movable relative to the oscillating element 7 on the at least one support 23, 24 in the axial direction X by the oscillating movement 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. As shown in FIG. According to the present embodiment, at least one thread guide 8a, 8b is aligned with the assigned suction slots 11a, 11b. This has the advantage that the composite fiber material 5a, 5b oscillates uniformly all the time around the midpoint M of the suction grooves 11a, 11b. If the composite fiber materials 5a, 5b oscillate uniformly around the middle position M of the suction grooves 11a, 11b, the distances from the two turning points 21, 22 to the middle point M are equal.

The lower rollers 2b, 3b, 4b on the two brackets 23, 24 in this specific embodiment are rotatable. Additionally or alternatively, the suction tubes 10 of the hold-down device 6 are mounted on the brackets 23 , 24 . The suction grooves 11a, 11b of the suction tube 10 therefore maintain a certain distance from the brackets 23, 24. Thereby, the supports 23 , 24 can serve as reference points for the stretching device 1 .

Both brackets 23 , 24 each have a floating bearing 32 , 33 , so that the oscillating element 7 can move freely in the axial direction X, but radially the oscillating element 7 is guided into the floating bearing 32 , 33 . For example, the two floating bearings 32 , 33 can 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 great, so that the oscillating element 7 can oscillate with a slight force, especially a tensile force.

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 and 31 of the two brackets 23 and 24 . Therefore, the bracket distance A is the distance between the two brackets 23 , 24 .

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

Additionally, the guide rail 25 has a first end point 28 and a second end point 29 . The first end 28 faces the first bracket 23 and the second end 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 oscillating element 7 by means of two connecting pieces 26 , 27 . As a result, the guide rail 25 does not rotate unnecessarily against the oscillating element 7 .

According to the present embodiment, the yarn guides 8a, 8b are aligned with the suction grooves 11a, 11b. The yarn guides 8a, 8b oscillate at equal distances to both sides around the middle position M of the suction grooves 11a, 11b. This means that the two turning points 21, 22 of the oscillatory motion CB are at the same distance from the central position M. Therefore, the distance from the turning points 21, 22 to the intermediate position M is the oscillation stroke CH or half the length thereof.

The length of the guide rail 25 in the axial direction X is L. Preferably, there is a certain relationship between the bracket distance A of the brackets 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 bracket distance A of the brackets 23 , 24 .

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

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

If the thread guides 8a, 8b oscillate exactly about 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 bracket 24 is the distance A2. The second distance A2 is half of the oscillation stroke CH or half the distance of the oscillation stroke CH.

If the thread guides 8a, 8b are aligned with the hold-down device 9, in particular the suction grooves 11a, 11b, 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 bracket 23 or the direction of the second bracket 24. A turning point 21, 22 will leave the central position M. In the worst case, one of the two turning points 21, 22 is displaced to the side of the suction grooves 11a, 11b.

For example, if the first distance A1 is smaller than the second distance A2, the guide rail 25 is displaced toward the first bracket 23 due to thermal expansion, and the first end 28 of the guide rail 25 strikes the first inner side 30 of the first bracket 23 through the oscillating motion CB, The oscillating movement CB has not yet reached the first turning point 21 . The oscillatory motion CB continues to travel in the corresponding direction after the impact. However, a creative idea of the present invention is that, in this specific embodiment, when the guide rail 25 is waiting on the first inner side 30 of the first bracket 23, the guide rail 25 moves toward the oscillating element 7 in the axial direction X, and this movement will This occurs until the oscillatory movement CB reaches the first turning point 21 and moves away from the first bracket 23 again. By the oscillating movement CB, the guide rail 25 is moved towards the second bracket 24 until the oscillating movement CB reaches the second turning point 22 . At this time, the second end 29 of the guide rail 25 hits the second inner side 31 of the second bracket 24 . Furthermore, the guide rail 25 can be aligned with the second inner side 31 if the second end point 29 has not reached the second turning point 22 of the oscillating movement CB after hitting the second inner side 31 .

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

The 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 bounded 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 groove 35 and is arranged in particular between the two detent points 37 , 38 . The plug 36 is mounted on the second end 29 of the guide rail 25 in this embodiment.

This has the advantage 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 plug 36 hits the braking points 37, 38 at the turning points 21, 22 of the oscillating movement CB. On the other hand, if the thread guide 8 is not aligned with the suction groove 11, neither the respective turning points 21, 22 are reached when the plunger 36 hits the braking points 37, 38. After hitting the braking points 37 , 38 , the guide rail 25 continues to move towards the oscillating element 7 until the thread guide 8 is aligned with the suction groove 11 again.

FIG. 5 a shows a cross section of the oscillatory element 7 with the coupled guide rails 25 . The guide rail 25 is connected to the oscillating element 7 by means of connections 26, 27 (see Figures 3, 4). The connecting pieces 26 , 27 in the present embodiment comprise a handle 39 , the backhand being mounted on the oscillating element 7 by means of screws 41 . Thus, the connection between the handle 39 and the oscillating element 7 is firm. The connecting pieces 26, 27 also comprise 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 toward the handle 39 and thus displace toward the oscillating element 7 . On the other hand, a suitable strength of the spring member 40 should be such that the guide rail 25 can move on at least one of the brackets 23 , 24 to align the yarn guide 8 with the hold-down device 9 . The spring element 40 in this embodiment presses the guide rail 25 onto the handle 39 from the inside. The configuration of the spring element 40 allows the guide rail 25 to be pressed 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 is preferably made of wear resistant plastic and the rail 25 is attached to the surface of the handle 39 so that the handle 39 does not wear out when the rail 25 is moved.

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

The present invention is not limited to the above-mentioned specific embodiments and examples, and the changes and combinations within the scope of the patent claims are related to the present invention. individual marks.

reference number

1 stretching device

2 first roller set

2a Roller up

2b Roller down

3 Second roller set

3a Up Wheel

3b Roller down

4 Third roller set

4a Upper scroll wheel

4b Roller down

5 Composite fiber materials

6 Oscillation device

7 Oscillating element

8 Yarn guide

9 Pressing device

10 straws

11 Suction slot

12 Spinning Units

13 Spinning drum

14 upper belt

15 lower belt

16 Steering unit

17 Steering table

18 Steering lever

19 Clamping rollers

20 pressure arm

21 The first turning point

22 Second turning point

23 First bracket

24 Second bracket

25 Rails

26 First connector

27 Second connector

28 First endpoint

29 Second endpoint

30 First inside

31 Second inner side

32 The first floating bearing

33 Second floating bearing

34 fork elements

35 grooves

36 Embolism

37 First braking point

38 Second braking point

39 handle

40 Spring element

41 screw

42 stops

LR running direction

CB oscillatory motion

X-axis

CH radial

M midpoint

A bracket distance

A1 first distance

A2 Second distance

L length

B width

Z plug width

Claims (16)

1. Stretching device (1) for spinning machines comprising:

a pair of rollers (2,3,4) between which at least one composite fibre material (5) can be passed and stretched;

oscillation means (6) further comprising an oscillation element (7) and at least one yarn guide (8), wherein said at least one yarn guide (8) is capable of guiding the composite fiber material (5) assigned to the yarn guide (8), said oscillation element (7) being capable of oscillating in its axial direction (X) with respect to said pair of rollers (2,3,4) upon an oscillating movement; wherein the at least one yarn guide (8) is arranged on the oscillating element (7) such that the at least one composite fibre material (5) is oscillated by an oscillating movement of the yarn guide (8) to which the composite fibre material (5) is assigned;

a compacting device (9) by means of which the composite fibre material (5) drawn off from the roller pairs (2,3,4) is compacted; and

at least one support (23,24) on which at least the roller pairs (2,3,4), the oscillating element (6) and/or the pressing device (9) are mounted;

it is characterized in that the preparation method is characterized in that,

the oscillating element (6) is arranged on the at least one support (23,24) in such a way that the at least one thread guide (8) is moved in the axial direction (X) relative to the oscillating element (7) by an oscillating movement on the at least one support (23,24) in such a way that the at least one thread guide (8) is aligned in the axial direction (X) relative to the pressing device (9).

2. Drawing device as in claim 1, characterized in that said at least one yarn guide (8) is arranged on said oscillating element (7) in such a way that said at least one yarn guide (8) is able to transfer an oscillating movement to the composite fibrous material (5) it dispenses and to move axially on said at least one carriage (23,24) for alignment when at rest.

3. Drawing device according to one of the preceding claims, characterised in that the pressing device (9) comprises a suction pipe (10) with at least one suction slot (11), wherein the at least one suction slot (11) is assigned a composite fibre material (5) by means of which the drawn composite fibre material (5) is pressed, and/or that the suction pipe (10) is fixed to a holder (23,24) at least in the axial direction (X) and that the at least one thread guide (8) can be aligned with the assigned suction slot (11).

4. Drawing device as in one of the previous claims, characterized in that the drawing device (1) has a plurality of yarn guides (8), in particular 8, wherein each yarn guide (8) is assigned a composite fiber material (5); preferably, the suction pipe (10) is provided with a suction groove (11) for each composite fiber material (5).

5. Stretching apparatus as in any claim hereinbefore, wherein said at least one yarn guide (8) is arranged on a guide (25) in turn arranged on the oscillating element (7); preferably, said oscillating element (7) and said guide rail (25) are parallel to each other.

6. Stretching apparatus as in any claim hereinbefore, wherein said at least one yarn guide (8) and/or said guide (25) are arranged on the oscillating element (7) by means of at least one connection (26, 27).

7. Stretching apparatus as in any claim hereinbefore, wherein the fastening strength of said at least one yarn guide (8) on said guide rail (25), and/or the fastening strength of said guide rail (25) on said oscillating element (7), and/or the fastening strength of said at least one yarn guide (8) on said oscillating element (7) is adjusted by means of a mounting device.

8. Stretching apparatus as in any claim hereinbefore, wherein said at least one yarn guide (8) is fixedly arranged on said guide (25), said guide (25) being movable in the axial direction (X) with respect to said oscillating element (7).

9. Stretching apparatus as in any claim hereinbefore, wherein the connection between said connecting elements (26,27) and said oscillating element (7) and/or said guide rail (25) and/or said yarn guide (8) is achieved by means of a slip clutch.

10. Stretching apparatus as in any claim hereinbefore, wherein said connecting means (26,27) are provided on said oscillating element (7) and/or on said guide rail (25) by means of at least one spring element (40).

11. Stretching apparatus as in any claim hereinbefore, wherein said oscillating element (7) is itself movable in an axial direction (X) with respect to said at least one support (23, 24).

12. Stretching apparatus as in any claim hereinbefore, wherein said stretching apparatus (1) comprises a first support (23) and a second support (24) spaced apart in the axial direction (X); preferably, the roller pair (2,3,4), the oscillation device (6) and/or the pressing device (9), in particular the suction tube (10), are/is arranged between the two supports (23, 24).

13. Stretching apparatus as in any claim hereinbefore, wherein the sum of the length (L) of said guide (25) and the oscillation stroke length (CH) of the oscillating movement corresponds to the bearing centre distance (A) between the opposite inner sides of the two supports (23, 24).

14. Stretching apparatus as in any claim hereinbefore, wherein at the midpoint position (M) of the suction slot (11) to which the composite-fibre material (5) is assigned, the first distance (A1) between the first end point (28) of the guide (25) and its corresponding first support (23) is half of the oscillation stroke (CH) and/or the second distance (A2) between the second end point (29) of the guide (25) and its corresponding second support (24) is half of the oscillation stroke (CH).

15. Stretching apparatus as in any claim hereinbefore, wherein a fork element (34) with an axial (X) recess (35) is provided on said at least one support (23, 24); at the ends (28,29) of the guide rail (25) which the fork element (34) faces, a plug (36) is provided which projects into the recess (35) and can be displaced in the recess (35) during an oscillating movement.

16. Stretching apparatus as in any claim hereinbefore, wherein said groove (35) has an axial (X) width (B) corresponding to the sum of the length of the oscillation stroke (CH) of the oscillating movement and the axial (X) plug width (Z) of said plug (36).

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