TWI386528B - Yarn tensioning device - Google Patents

Description

Yarn stretching device Field of invention

The invention relates to a yarn drawing device with an introducer, an exporter (Auslaufführung) and a webmer between the two, the reel having a rotating shaft (Rotationsachse) And a working area (Arbeitsbereich) on which a yarn path (Fadenpfad) extends circumferentially between the introducer and the deflector.

Background of the invention

One such yarn stretching device is known, for example, from DE 43 42 412 A1. It provides a yarn drawn from a Spule placed in a creel by means of a force which is desirable for subsequent yarn re-machining. Here, the winder can be decelerated, for example, or driven at another speed different from the yarn. As a yarn passes through the yarn path, it then abuts the working area of the winder and is correspondingly slowed or accelerated so that the desired tension is adjusted in the yarn.

Different yarns usually also have different characteristics. This can result in a coiler working with a type of yarn that does not work with another type of yarn. Therefore, the winder can be set to be replaceable. The operator will then use a suitable winder depending on the type of yarn used.

Within a creel, a yarn tensioning device is typically necessary for each bobbin position. A creel can have absolutely hundreds of bobbin positions. Set up If it takes only 15 seconds to replace a winder, a creel with 800 bobbin positions takes 200 minutes, and obviously more than 3 hours.

Summary of invention

The object of the invention is to achieve a high degree of flexibility (Flexibilität) at low time costs.

This problem is solved in the case of a yarn drawing device of the art mentioned at the outset, through which the working area is axially divided into at least two sections having different characteristics.

Then you can use a winder to handle different yarn types. The operator only has to place the yarn guided by the yarn tensioning device on the correct cross section. There is no need to operate the yarn when the yarn is replaced, meaning that there is virtually no additional expense in placing the yarn in the correct cross section in the axial direction. It is also possible to use the same yarn tensioning device to handle different yarn types.

In a preferred embodiment, a first section has a smooth contact surface. The smooth contact surface is used in fine yarns, although the fine yarns have sufficient friction with the smoothing mask. In that case, the friction is enhanced because the yarn is guided several turns around the winder.

Preferably, the smooth contact surface and the rotating shaft form an acute angle. The contact surface is also formed in the shape of a tapered cross section. The yarn path can then be guided such that the individual coils of the yarn are not staggered.

Preferably, a second section has a V-shaped groove. The yarn is embedded in the V-groove so that the friction with the winder can be increased.

Preferably, the groove has at least one wall in which the wall alternates Set with teeth and backlash. One such setting is also known as "Criprad." Coppola has the advantage of achieving a good friction between the winder and the yarn. However, this also has fouling, such as the accumulation of residues of a spin finish, and the disadvantage that the fibers will be drawn in the case of fine yarns or strands.

Preferably, the groove is formed between the two plates, wherein a plate member facing the first section forms a boundary in the direction of the second section in the first section. Then no additional elements are needed to create a boundary between the two sections and thereby prevent the yarn from reaching the second section or reversing from the first section during operation. More specifically, the boundary between the first section and the second section is produced via the formation of the second section.

Preferably, the introducer and/or the deflector are adjustable relative to the winder between a first position disposed in the first section and a second position disposed in the second section. The adjustment consists in that the introducer and/or the deflector can be adjusted parallel to the spindle, and the position of the winder can be adjusted to be parallel to the spindle. This makes it possible for the yarns to be correctly distributed to the respective sections at the time of introduction and/or at the time of export. This makes the load of individual yarns small.

In a preferred embodiment, a yarn guiding device having at least one movable yarn guiding element is provided between the winder and the guide and/or the deflector. The yarn guiding element can for example be under the tension of a spring. By virtue of the yarn guiding element, the force by which the yarn is wound around the winder is changed.

Preferably, the yarn guiding member and the position of the winder are changed relative to each other in a direction parallel to the rotating shaft. Operating on the yarn guiding element There will be no insufficient tension applied to the yarn. In addition to the yarn guiding element alone, the entire yarn guiding device can also be adjusted relative to the winder, wherein the winder or the yarn guiding device or both can also be adjusted here.

Preferably, a stabilizing device is provided in the yarn path behind the introducer, the position of which is adjustable relative to the winder in a direction parallel to the axis of rotation. Then, especially when the yarn is withdrawn from the bobbin via the top end and a "Ballon" appears, a stabilizing device is adapted to achieve an average impact of the yarn when operating around the reel (Kraftbeaufschlagung) . By virtue of the adjustability parallel to the axis of rotation, the yarn can be traversed in the desired direction (preferably in a plane) through the yarn stretching device. When the yarn is guided via the tapered inclined smooth surface, the introduction and the withdrawal of the yarn parallel to the rotating shaft are slightly distant from each other.

Simple illustration

The invention will be described with reference to the following preferred embodiment in conjunction with the drawings. Here, a side view of the yarn drawing device of Fig. 1 is shown, a top view of the yarn stretching device of Fig. 2, and a perspective view of the winding machine of Fig. 3.

Detailed description of the preferred embodiment

Figure 1 shows a yarn drawing device 1 having a base 2 on which a rotatable winder 3 is provided. The winder 3 is coupled to an electric motor 4 which is also driven by a generator in a torque-resistant manner.

An introducer 5 and a deflector 6 are disposed on the base 2.

A yarn 7 is introduced via the introducer 5, wound around the winder 3 and then exported via the exporter 6. A stabilizing device 8 is disposed between the introducer 5 and the winder 3, the stabilizing device 8 being formed by two tapered plates 9, 10 stacked with their smaller diameters. The stabilizing device 8 reduces the vibration of the yarn 7 (e.g., possibly caused by the yarn 7 drawn from a bobbin that is not further detailed via the tip).

A yarn guiding device 11 is provided between the winder 3 and the deflector 6, the yarn guiding device 11 having a movement in the direction of a double arrow 13, which also substantially intersects the conveying direction of the yarn 7. Movable yarn guiding element 12. The yarn guiding element 12 can be placed under a specific initial tension via a spring that is not further detailed.

As can be seen from Figures 1 and 3, the winder has a working area 14 having a first section 15 and a second section 16.

The first section 15 has a smooth contact surface for the yarn 7. The first section 15 is slightly inclined to be tapered, that is, the contact surface forms an acute angle with a rotating shaft 22 of the winder 3. A cover plate 17 is provided on the end having a smaller diameter, the cover plate 17 projecting slightly beyond the first section 15 in a radial direction. Thereby, the yarn 7 is prevented from being withdrawn through the top end of the first section 15.

The second section 16 has a V-shaped groove 18. As can be seen from Fig. 3, the groove 18 has at least one wall 19 in which the teeth 20 and the backlash 21 are alternately arranged. The second section 16 is thus constructed such as "Criprad" and has a relatively good friction with the yarn 7 when the yarn 7 is guided via the second section 16.

This groove 18 is formed between the two plates 23, 24. The first section The plate 23 of the face 15 has a diameter which is slightly larger than the first section 15 in the region of the plate 23 such that the plate 23 forms a boundary for the first section 15 in the direction of the second section 16. The yarn 7 can be accidentally slid from the first section 15 to the second section 16 or vice versa.

The winder 3 has a projection 30 at its side facing the base 2, the projection 30 having an opening 25 that can be inserted into one of the spindles of the motor 4. This winder can be coupled to the motor 4 via insertion and cannot be rotated.

The individual components of the yarn tensioning device 1 can be adjusted parallel to the axis of rotation 22 as indicated by the double arrows 26-29. To simplify the following description, an adjustment in accordance with the direction of the double arrows 26-29 is simply referred to as "axial adjustment". In the case of one such axial adjustment, the position can also be changed to the other direction.

If the yarn 7 is not desired, as described in Figure 1, it is guided via the first section 15, but via the second section 16, which can be adjusted axially in the simplest case. . In the illustrated embodiment, the winder 3 will be slightly removed from the base 2. The remaining components will then remain in place, where it will be advantageous for the deflector 6 and the yarn guiding device 11 to be slightly closer to the base 2.

Alternatively, if the yarn 7 is to be guided via the second range 16, the introducer 5, the deflector 6 and the stabilizing device 8 can be moved to the base in the direction of the double arrow 26-28. 2 close. Of course, it is also possible to combine two axial adjustments.

Of course, the winder 3 can also have more than the two sections 15, 16 described. However, in many cases two different cross sections are sufficient.

1‧‧‧Yarn stretching device

2‧‧‧Base

3‧‧‧Winding machine

4‧‧‧Motor

5‧‧‧ Importer

6‧‧‧Exporter

7‧‧‧Yarn

8‧‧‧stabilizer

9‧‧‧ Tapered plate

10‧‧‧ Tapered plate

11‧‧‧ yarn guide

12‧‧‧Guide components

13‧‧‧Double arrow

14‧‧‧Workspace

15‧‧‧First section

16‧‧‧Second section

17‧‧‧ Cover

18‧‧‧V-groove

19‧‧‧ wall

20‧‧‧ teeth

21‧‧‧ Backlash

22‧‧‧ shaft

23‧‧‧ boards

24‧‧‧ board

25‧‧‧ openings

26‧‧‧Double arrow

27‧‧‧ double arrow

28‧‧‧Double arrow

29‧‧‧Double arrow

30‧‧‧ outstanding

Fig. 1 is a side view of the yarn stretching device, Fig. 2 is a plan view of the yarn stretching device, and Fig. 3 is a perspective view of the winding machine.

1‧‧‧Yarn stretching device

2‧‧‧Base

3‧‧‧Winding machine

4‧‧‧Motor

5‧‧‧ Importer

6‧‧‧Exporter

7‧‧‧Yarn

8‧‧‧stabilizer

9‧‧‧ Tapered plate

10‧‧‧ Tapered plate

14‧‧‧Workspace

15‧‧‧First section

16‧‧‧Second section

17‧‧‧ Cover

18‧‧‧V-groove

19‧‧‧ wall

22‧‧‧ shaft

23‧‧‧ boards

26‧‧‧Double arrow

27‧‧‧ double arrow

28‧‧‧Double arrow

29‧‧‧Double arrow

Claims (8)

A yarn stretching device having an introducer, a deflector and a winder interposed therebetween, the winder having a rotating shaft and a working area, a yarn path on the working area a circumferential direction extending between the introducer and the deflector, wherein the working area is axially divided into at least two sections having different characteristics, wherein a first section has a smooth contact surface, and a The two sections have a V-shaped groove. The yarn stretching device of claim 1, wherein the smooth contact surface and the rotating shaft have an acute angle. A yarn stretching device according to claim 1, wherein the groove has at least one wall in which teeth and a backlash are alternately disposed. The yarn stretching device of claim 1, wherein the groove is formed between the two plates, wherein a plate facing the first section is in the first section The direction of the two sections forms a boundary. The yarn stretching device of claim 1, wherein the introducer and/or the deflector are disposed at a first position of the first section with respect to the winder, and a configuration The second position of the second section is adjusted between. A yarn stretching device according to claim 1, characterized in that a yarn guiding device having at least one movable yarn guiding member is provided between the winder and the introducer and/or the deflector. A yarn drawing device according to claim 6 of the patent application, characterized in that The yarn guiding members and the position of the winder can be changed relative to each other in a direction parallel to the rotating shaft. A yarn drawing device according to claim 1, wherein the yarn path downstream of the introducer is provided with a stabilizing device which is movable in a direction parallel to the rotating shaft with respect to the winder Make adjustments.