EP1673494A1

EP1673494A1 - Device for guiding, conveying, or treating a fiber cable

Info

Publication number: EP1673494A1
Application number: EP04765047A
Authority: EP
Inventors: Hans-Joachim Heidel; Arnd Grimm
Original assignee: Saurer GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2003-09-12
Filing date: 2004-09-10
Publication date: 2006-06-28
Also published as: US20060186164A1; WO2005026417A1; JP2007505019A; KR20060119974A; CN1849419A

Abstract

Disclosed is a device for guiding, conveying, or treating a fiber cable (7), comprising several driven rollers (2, 3, 4.1, 4.2, 4.3, 4.3, 4.4), the fiber cable being guided along the circumference of the rollers so as to partly wrap therearound. The rollers encompass a roller (2) for feeding the fiber cable and a roller (3) for discharging the fiber cable. The remaining rollers (4.1, 4.2, 4.3, 4.4) are disposed relative to the feeding roller and the discharging roller in such a way that the fiber cable can be guided on the rollers at a respective angle of contact of >180 DEG . In order to involve all rollers to the same extent for guiding, conveying, and treating the fiber cable, the feeding roller and the inlet of the fiber cable as well as the discharging roller and the outlet of the fiber cable are arranged relative to each other such that the fiber cable can be guided along the circumference of the feeding roller and the circumference of the discharging roller so as to partly wrap therearound at a respective angle of contact of >180 DEG .

Description

Device for guiding, conveying or treating a fiber cable

The invention relates to a device for guiding, conveying or treating a fiber cable according to the preamble of claim 1.

In the production of synthetic fibers, it is known that the individual spun fiber bundles are brought together to form a fiber cable and are withdrawn from the spinning mill by a device with a plurality of driven rollers. Sufficient thread tension must be generated by the rollers to pull all the fiber strands forming the fiber cable evenly out of the spinning mill. So that a defined spiruititer can be established during the routing of the fiber cable, there must be no slippage between the fiber cable and the rollers, particularly in the run-off area. The rollers can all be driven at the same peripheral speed or for the purpose of drawing at a differential speed. Both to build up the tensile forces and to avoid slippage. the fiber cable must be guided on the rollers with certain minimum wrap angles. The sum of all swing angles on the rollers is a measure of the maximum tractive force that can be generated. Six, eight or even more rollers are used to pull fiber cables. Such Vorrichtαng is known for example from DE 24 55 117 AI. The known device is formed from an inlet roller for the inlet of the fiber cable and an outlet roller for the outlet of the fiber cable. Between the inlet roller and the outlet roller, a total of five additional rollers are arranged offset from one another in such a way that the fiber cable can be guided on the intermediate rollers with the greatest possible wrap angles.

With such a large number of rollers, however, the problem arises that the physical Ziαsarrimeri slopes (Eytelwein rope friction) to one leads to different loads on the rollers. Additional fluctuations in the coefficient of friction between the individual pairings of the fiber cable and the rollers, for example due to irregularities in the preparation or in the preparation application of the fiber cable, reinforce such irregularities.

It is therefore an object of the invention to develop a device for guiding, conveying or treating a fiber cable of the type mentioned at the outset in such a way that the aforementioned disadvantages do not occur. Another object of the invention is to provide a generic device with which the greatest possible tensile forces can be generated with relatively few rollers for guiding the fiber cables.

The object of the invention is achieved in that the inlet roller and the inlet of the fiber cable and outlet roller and the outlet of the fiber cable are arranged in such a way that the fiber cable can be guided in partial wrap with a wrap angle of> 180 ° on the circumference of the inlet roller and the outlet roller.

Advantageous developments of the invention are defined by the features and combinations of features of the subclaims.

The invention is based on the knowledge that, in accordance with the Eytelwein relationship, the rollers are subjected to low loads, particularly in the run-out area, provided uniform circumferential speeds are required. The device according to the invention avoids this in that the fiber cable is also guided on the discharge roller with the greatest possible wrap. This means that the required total wrap can be achieved with fewer rollers and, on the other hand, the discharge roller can be used and loaded due to the larger wrap angle to build up the tensile forces. The invention further provides that the inlet roller and the inlet of the fiber cable are arranged to implement a large wrap angle of> 180 °. This means that each of the rollers can be used with a high degree of utilization, so that with a few rollers it is possible to generate relatively large total loops and thus relatively large tensile forces for pulling or stretching the fiber cable.

This effect can be improved further by the fiber cable being able to be guided on all rollers in partial loops, each with a wrap angle of> 10 °, preferably of> 200 °.

The rollers can be arranged such that the fiber cable is guided on each of the rollers with an equally large wrap angle.

However, it is also possible to make the wrap angles on the inlet roller and the outlet roller different in relation to the wrap angles on the other rollers.

In the case of an advantageous arrangement of a total of four rollers, the additional rollers can be arranged between the inlet roller and the outlet roller, so that the fiber cable can be guided with uniform transitions between the rollers.

However, it is also possible to arrange the inlet roller and the outlet roller between the additional rollers. This creates a longer free guide path for the fiber cable between the additional rollers on the outside. By appropriately selecting the wrap angle, total wrap of> 900 ° can be achieved using four rollers. In order to be able to build up higher total wraps of> 1,000 ° as well as higher take-off forces or stretching forces, three rollers or more than three rollers can advantageously be arranged between the inlet roller and the outlet roller. In those cases where differential speeds between the individual rollers are required, the drive motors of the rollers are advantageously controlled by individual converters. In the event that the circumferential speed of the rollers is of the same size, each of the drive motors can be controlled via a common group converter. A mechanical connection of the rollers in connection with a drive motor is also possible.

The device according to the invention is thus particularly suitable for pulling and stretching fiber cables with the smallest possible number of rollers. This ensures easy handling by reducing the number of thread transfers between the individual rolls. The saving of each additional thread transfer means at the same time a reduction in the risk of winding. The device according to the invention thus represents an inexpensive technical solution for guiding, conveying and treating a fiber cable.

Some embodiments of the device according to the invention are described below with reference to the accompanying drawings.

They represent:

Fig. 1 shows schematically a first embodiment of the device according to the invention in plan view;

Figure 2 shows the first embodiment in a side view. Fig. 3 shows schematically a second embodiment of the device according to the invention with four rollers;

Fig. 4 shows schematically a third embodiment with four rollers;

Fig. 5 shows schematically a fourth embodiment with four rollers;

Fig. 6 schematically shows another embodiment of the device according to the invention with five rollers;

Fig. 7 sc ematic an embodiment of the device according to the invention with six rollers; and

Fig. 8 schematically shows another embodiment with six rollers.

1 and 2, a first embodiment of the device according to the invention is shown schematically. Fig. 1 shows the embodiment in a plan view without guiding a fiber cable and in Fig. 2 the embodiment is shown in a side view with guidance of a fiber cable. The following description applies to both figures, insofar as no express reference is made to one of the figures.

An inlet roller 2, an outlet roller 3 and the rollers 4.1 and 4.2 are arranged next to one another on a carrier wall 1. The rollers 2, 3, 4.1 and 4.2 are constructed identically and are rotatably held on the carrier wall 1 with one drive end. The rollers 2, 3, 4.1 and 4.2 are each coupled to a drive motor 8 by their drive ends. Each of the drive motors 8 is assigned a converter 9, by means of which the drive motors 8 can be controlled. The arrangement of the inlet roller 2, the outlet roller 3 and the rollers 4.1 and 4.2 is selected such that the rollers 4.1 and 4.2 are each held on the outside, with a large distance from one another, on the carrier wall 1. The rollers 4.1 and 4.2 face each other at a distance in a horizontal plane.

Between the rollers 4.1 and 4.2, the inlet roller 2 and the outlet roller 3 are arranged at a short distance from one another in a second horizontal plane. The second horizontal plane extends below the first horizontal plane in which the rollers 4.1 and 4.2 are arranged. Here, the distance between the two horizontal planes is selected such that a fiber cable 7, which is fed horizontally via an inlet 5, can run freely from the outside to the inlet roller 2 without contact with the upstream roller 4.1. The fiber cable 7 can thus be led away horizontally via a drain 6 from the outlet roller 3 without contact to the downstream roller 4.2. The symmetrical arrangement of the rollers 2 and 3 and 4.1 and 4.2 means that a fiber cable 7 can be guided on the rollers 2, 3, 4.1 and 4.2 with the same wrap angle α. The wrap angle α achievable in this way could, for example, have a value of 227.5 °, so that a total wrap of 910 ° would be achieved. The fiber transition from the inlet roller 2 to the roller 4.1 and the fiber transmission from the roller 4.2 to the outlet roller 3 are identical.

The embodiment shown in FIGS. 1 and 2 of the device according to the invention could be used for guiding and conveying a fiber cable in which all the rollers are driven at the same circumferential speed. In such a case, the drive motors 8 of the rollers 2, 3, 4.1 and 4.2 could be controlled together by a group converter 10, as shown in broken lines in FIG. 1.1. 3, 4 and 5 schematically show further exemplary embodiments of the device according to the invention, each with four rollers. FIGS. 3, 4 and 5 each show different arrangements of the rollers in a side view, the additional rollers 4.1 and 4.2 each being arranged between the inlet roller 2 and the outlet roller 3. The structure of the device is essentially identical to the previous exemplary embodiment, so that reference is made to the description of FIGS. 1 and 2. Only the differences are explained in more detail below. In Fig. 3, the inlet roller 2 and the outlet roller 3 are arranged one above the other at a distance in a vertical plane. The two further rollers 4.1 and 4.2 are arranged in a horizontal plane centrally between the inlet roller 2 and the outlet roller 3. The distances between the rollers are designed in such a way that a fiber cable 7 guided on the circumference of the rollers 2, 4.1, 4.2 and 4.3 is in each case guided with a partial loop. Here, the fiber cable 7 is guided with a wrap angle α at the inlet valze 2 and the outlet roller 3. In contrast, a somewhat larger wrap angle β is achieved in the middle rollers 4.1 and 4.2. The wrap angle on the inlet roller 2 and on the outlet roller 3 is> 200 °. For this purpose, the inlet 5 of the fiber cable 7 is formed obliquely above the inlet roller 2. Accordingly, the outlet 6 of the fiber cable 7 is formed obliquely below the outlet roller 3.

4 shows a further possible arrangement of the four rollers. Here, the inlet roller 2 and the roller 4.2 are arranged one above the other in a first vertical plane and the roller 4.1 and the outlet roller 3 are arranged one above the other in a second vertical plane. The rollers 2, 4.1, 4.2 and 3 are arranged offset to one another in the two vertical planes lying next to one another. The inlet 5 and the outlet 6 of the fiber cable 7 is identical to the previous exemplary embodiment according to FIG. 3. Here, too, the fiber cable 7 is wrapped with a wrap angle α at the inlet roller and guided on the outlet roller 3. The fiber cable 7 is guided with a wrap angle β on the additional rollers 4.1 and 4.2. Here, the wrap angle β is slightly larger than the wrap angle α. Due to the oblique arrangement of the inlet 5 and the outlet 6, a wrap angle of> 200 ° can advantageously be achieved.

An arrangement of the four rollers is shown in FIG. 5, in which a wrap angle α> 200 ° is also realized on the inlet roller 2 and the outlet roller 3. Here, however, the fiber cable 7 is fed horizontally via the inlet 5 and discharged horizontally via the outlet 6. The rollers 2, 4.1, 4.2 and 3 are held one above the other in an offset arrangement. Here larger wrap angles β are achieved on the middle rollers 4.1 and 4.2. The arrangements of the rollers shown in FIGS. 3 to 5 enable the implementation of individual wrap angles up to ax. 230 °. An increase or the order of magnitude of the wrap angle is essentially limited by predetermined minimum distances between the rollers, which are required for the laying of a fiber cable. With a roll diameter of 800 mm, for example, minimum distances between the rolls of approx. 150 mm are required to lay the fiber cables.

In Fig. 6, another Ausiunrungsbeispiel the device according to the invention is shown schematically in a side view. A top view was also omitted here, since the structure is essentially identical to the exemplary embodiment according to FIGS. 1 and 2. In this respect, reference is made to the description of FIGS. 1 and 2 and only the differences are explained below.

6, a total of three further rollers 4.1, 4.2 and 4.3 are arranged between an inlet roller 2 and an outlet roller 3.

The arrangement is chosen such that the inlet roller 2, the roller 4.2 and the outlet roller 3 are arranged at a distance from one another in a first vertical plane. The rollers 4.1 and 4.3 are arranged in a second adjacent vertical plane. In this case, a minimum distance between the rollers is maintained, so that the roller 4.1 is arranged centrally to the inlet roller 2 and the roller 4.2 arranged above it. Accordingly, the roller 4.3 is held in the center next to the roller 4.2 and the outlet roller 3. The inlet 5 is formed obliquely above the inlet roller 2. The outlet 6 is formed obliquely below the outlet roller 3, so that the fiber cable 7 is guided with a wrap angle of> 180 ° at the inlet roller 2 and the outlet roller 3. The distance between the inlet roller 2 and the roller 4.2 arranged directly above it in the vertical plane is smaller than the roller diameter of the roller 4.1, so that when the fiber cable 7 is guided from the inlet roller 2 to the middle rollers 4.1 and 4.2, large looping angles of> 200 ° are possible. With the exemplary embodiment shown in FIG. 6, the total wrap angle of> 1,000 ° can thus be achieved. The transition between the individual rollers is carried out essentially the same.

To build up even greater take-off forces or stretching forces, six rollers can advantageously also be integrated in a device according to the invention. Possible examples of the arrangement of the rollers are shown in FIGS. 7 and 8. In this case, a horizontal inlet and outlet of the fiber cable to the inlet rollers 2 and the outlet rollers 3 are realized. For the rest, reference is made to the structure of the device according to FIGS. 1 and 2.

7, four further rollers 4.1, 4.2, 4.3 and 4.4 are arranged offset to one another between the inlet roller 2 and the outlet roller 3. The roller distances between the individual rollers are identical, so that the individual wrap angles for guiding a fiber cable lead to a total wrap of> 1,200 °. In the exemplary embodiment shown in FIG. 8, the six rollers are arranged in two groups, the first group being formed by the inlet roller 2 and the two downstream rollers 4.1 and 4.2 arranged offset with respect to one another. The second group of rollers comprises the outlet roller 3 and the rollers 4.3 and 4.4 arranged offset therefrom. Here, too, the fiber cable is guided on the individual rollers with wrap angles in the range between 180 ° and 230 °. The exemplary embodiments of the device according to the invention shown in FIGS. 1 to 8 can be used to pull off one or more fiber cables in a spinning system. The inlet 5 could be formed, for example, by a deflecting roller which is arranged directly after a spinning device and which brings the individual freshly spun fiber bundles together to form a fiber cable. The drain 6 could be formed, for example, by a guide roller arranged directly upstream of a reel device.

Furthermore, all of the exemplary embodiments of the device according to the invention shown in FIGS. 1 to 8 can be used for stretching one or more fiber cables or for thermal treatment of one or more fiber cables. For this purpose, the rollers can have additional heating means or coolants.

To stretch one or more fiber cables, several devices according to the invention are used regularly, which cause the fiber cables to stretch between the individual devices due to different speeds. LIST OF REFERENCE NUMBERS

1 support wall

2 infeed roller

3 outlet roller

4.1 to 4.4 roller

5 inflow

6 process

7 fiber cables

8 drive motor

9 inverters

10 group inverters

Claims

claims

1. Device for guiding, conveying or treating a fiber cable (7) with a plurality of driven rollers (2, 3, 4), on the circumference of which the fiber cable is guided with a partial wrap, the rollers being an inlet roller (2) for the inlet of the Have fiber cables (7) and an outlet roller (3) for the outlet of the fiber cable (7) and the remaining rollers (4.1, 4.2) are arranged in relation to the inlet roller (2) and the inlet roller (3) such that the fiber cable (7 ) with a wrap angle of> 180 ° each on the rollers (2, 3, 4), characterized in that the inlet roller (2) and the inlet (5) of the fiber cable (7) as well as the outlet roller (3) and the The drain (6) of the fiber cable (7) is arranged in such a way that the fiber cable (7) can be guided in partial wrap with a wrap angle of> 180 ° on the circumference of the inlet roller (2) and the outlet roller (3).

2. Device according to claim 1, characterized in that the fiber cable (7) on all rollers (2, 3, 4) in partial wrap with a wrap angle of> 190 °, preferably of> 200 ° can be guided.

3. Device according to claim 1 or 2, characterized in that the wrap angle on the rollers (2, 3, 4) are the same size.

4. The device according to claim 1 or 2, characterized in that the Umschlingungswinlcel on the inlet roller (7) and the outlet roller (3) and / or the wrap angle on the other rollers (4) are the same size.

5. Device according to one of the preceding claims, characterized in that a total of two additional rollers (4.1, 4.2) of the inlet roller (2) and the outlet roller (3) are assigned.

6. The device according to claim 5, characterized in that the additional rollers (4.1, 4.2) between the inlet roller (2) and the outlet roller (3) are arranged.

7. The device according to claim 5, characterized in that the inlet roller (2) and the outlet roller (3) between the additional rollers (4.1, 4.2) are arranged.

8. Device according to one of claims 1 to 5, characterized in that a total of three rollers (4.1, 4.2, 4.3) are arranged between the inlet roller (2) and the outlet roller (3).

9. Device according to one of claims 1 to 5, characterized in that a total of more than three rollers (4.1, 4.2, 4.3, 4.4) are arranged between the inlet roller (2) and the outlet roller (3).

10. Device according to one of the preceding claims, characterized in that the drive motors (8) of the rollers (2, 3, 4) by a plurality of individual converters (9) or by a G ppenu judge (10) are controllable.

11. Device according to one of the preceding claims, characterized in that the rollers (2, 3, 4) are mechanically coupled by gears or chains and are driven by a drive motor (8) with converter (9).