EP1268887B1 - Parallel spinning process involving the intermingling of threads between galettes and a corresponding spinning installation therefor - Google Patents

Description

The invention relates to a parallel spinning device for producing threads to be wound on winders from combined filaments produced by spinning polymer melt, consisting of lower and upper godets with rotatable thread-guiding jacket surfaces, one speed-controllable drive connected to lower and upper godets, and between lower and upper godet attached thread swirling devices, the number of which corresponds to that of the threads.

Spinning plants for conventional P (patially) O (oriented) Y (yarn) spinning processes are usually with two separately driven and speed-controllable godets, over which several threads - depending on the winder four, six or eight threads - are guided in an S-shaped thread run , equipped for regulating the thread tension between the thread oiling and the thread winding. In this course of the thread, the freshly spun filament coulters are first guided parallel to one another to the corresponding thread oilers, closed there to form a thread, and the threads, closely combined, are stirred over the godets. Then the group of threads is rotated by 90 ° according to the desired bobbin width and fanned out again to the winder. In order to achieve a better thread closure, pneumatically operated thread interlacing devices, so-called tenon nozzles or interlacers, are often used. This takes place in an advantageous manner between the godets, since on the one hand the thread tension is still adjustable and on the other hand the thread insertion is made easier by the narrow thread stand.

In contrast to the crossed yarn path described above, in which the spinning axis is rotated by 90 ° to the winder axis, is the parallel spinning process according to US-A-3902853, the arrangement of yarn swirling devices and the handling between the godets has not yet been solved.

Up to now, modern parallel spinning processes have mainly been designed as S (super) H (high) S (speed) S (spinning) spinning processes (Zimmer Aktiengesellschaft) or as H (high) O (oriented) Y (yarn) spinning processes, where directly, ie without regulation of the thread tension by godets, parallel and perpendicular from the spinnerets to the winder. Although such a construction is inexpensive and compact, in addition to the disadvantages with regard to thread uniformity, bobbin build-up and limited titer range, threading and applying the thread at the start of the spinning process is very time-consuming and extremely uncomfortable.

For POY spinning processes, parallel spinning devices according to WO-A-96/09425 are usually equipped with two long godets, between which the thread interlacing devices are attached. Apart from the fact that langalettes are comparatively very expensive, threading and putting on the threads is lengthy and uncomfortable; in addition, the laying of the threads requires a certain amount of space for safety reasons alone.

Another POY spinning process, in which a small pair of godets is provided for each thread, was presented by the Barmag company at ITMA in June 1999. With this spinning device, thread swirling devices cannot be accommodated between the small godets. The use of. Small pairs of godets compared to long pairs of godets much cheaper but since the function of regulating the thread tension is not sufficiently guaranteed at the low wrap angle of <90 °, separate drives and their speed control for the godets have consequently been dispensed with.

Starting from the prior art described at the outset, the present invention is based on the object of making the parallel spinning device more user-friendly and functional with regard to the regulation of the thread tension and thread interlacing.

This object is achieved by the features of the parallel spinning process according to claim 1 or the parallel spinning system according to claim 2.

In the arrangement of godets and interlacers according to the invention, the task is solved with surprisingly user-friendly handling and full fulfillment of the desired functions. The new concept achieves serious process and handling advantages that quickly amortize the higher investment over the operating time: a very large wrap angle of over 180 ° is feasible, as is thread swirling between the godets and the use of speed-controlled drives to control the thread tension , Furthermore, the automatic threading in the tenon nozzle and via the godets, which, as a surprising handling solution, improves the effectiveness of the systems through shorter application times

In the proposed arrangement according to the invention, two godets (2; 3) are used per thread (1) in such a way that, in the operating state of the system, the thread (1) wraps around the thread (1) from at least 85 ° to a maximum -200 °; but preferably from 115 ° to 185 °. In the further description, the godets (2) are referred to here as "lower" godets, the godets (3) as "upper" godets.

During the lay-up phase, all of the upper godets (3), which are combined on a movable godet unit (4) and are also driven together, are moved downward, so that each individual thread (1) first arrives from the upper thread guide (5) the lower godet (2) can be inserted with a slight kink in the associated thread guide of the traversing triangle (6) (cf. FIG. 1). After this has been done for all threads (1), the godet unit (4) with the upper godets (3), in order to avoid collisions with the lower godets (2), on a curved or preferably circular section path (7), upwards driven and each individual thread (1) in each case threaded into the associated interface (8) (cf. FIG. 3).

In the end position for the operating state (cf. FIG. 3), an S-shaped thread guide is then obtained for each thread, each with a 180 ° loop around the godets (2; 3) and with the interlacers (8) arranged between the godets (2 ; 3), which allows easy adjustment of the thread tension. The lower (2) and upper (3) godets are each grouped together in terms of drive technology. This group configuration of the godets (2; 3) enables inexpensive drives Toothed belt (9; 12) and control options via electronic speed control. The overall arrangement is housed in a housing (10) with a sliding door (11), which is only opened for application, so that the excess preparation that is blown off the thread (1) during suction can be easily extracted.

In a further embodiment of the invention, it is intended to simplify the threading process even further by moving the traversing thread guides (6) - combined in a horizontally movable thread guide unit (not shown) - in such a way that each individual thread (1) is initially straight is threaded and then all threads (1) are warped together so that the first contact with the lower godets (2) for all threads (1) takes place simultaneously. The further process is then as described above: the upper godets (3) are guided upwards and the threading into the respective interlacer (8) takes place automatically. This happens because the upper individual godets (3), which are grouped together in the godet unit (14), by means of a parallel swivel gear (14), preferably consisting of at least two swivel levers (15) and a pneumatic drive on a cam track ( 7) can be pivoted, this curved path (7) preferably corresponding to a segment of a circle (cf. FIGS. 1 to 4).

• Die Fig. 1 zeigt den Fadenlauf in Aufsicht auf die Galetten im Anlegemodus,
• die Fig. 2 zeigt die Aufsicht auf Riementriebe im Anlegemodus mit Fadenlauf,
• die Fig. 3 zeigt den Fadenlauf in Aufsicht auf die Galetten im Betriebsmodus,
• die Fig. 4 zeigt die Aufsicht auch auf die Galetten und Riementriebe im Betriebsmodus
• und die Fig. 5 einen Schnitt durch einen beispielhaften Parallel-Spinnbetrieb in Back-to-Back-Anordnung.

The further description is based on exemplary drawings:

• 1 shows the thread running in supervision of the godets in the lay-on mode,
• 2 shows the top view of belt drives in lay-on mode with thread running,
• 3 shows the thread running in supervision of the godets in the operating mode,
• 4 shows the top view of the godets and belt drives in the operating mode
• and FIG. 5 shows a section through an exemplary parallel spinning operation in a back-to-back arrangement.

Fig. 1 shows the upper godets (3) after inexperienced in the lay-on mode below the lower godets (2), which are fixed on the spinning wall (13). The overall arrangement of the godets (2; 3) is accommodated in a housing (10) with a sliding door (11) which is open for application. In the lay-on mode shown here, each individual thread (1), which initially comes from the upper thread guide (5), past the lower godet (2) with a slight bend and is inserted into the associated thread guide of the traversing triangle (6) without the upper godet (3 ) or to touch the swirling device (8).

In Fig. 2 , the top view of the belt drives is shown in the lay-on mode, with the thread running indicated. The upper godets (3), here only indicated by dashed lines, are all combined on a swiveling godet unit (4), which by means of a parallel swivel gear (14) consisting of two swivel levers (15) and a pneumatic drive (not shown here) on a curved path (7), which corresponds to a circular section, has been pivoted downwards. The upper godets (3) and the lower godets (2) are each grouped together and are each driven together via a toothed belt (9, top) or (12, bottom). The comb-shaped belt guides over the numerous deflection rollers (17) are necessary to avoid collisions between the drives.

3 then shows the top view of the godets and the thread run in the operating mode with the wraps of more than 180 °. After all the threads (1) have been threaded as described in FIG. 1, the godet unit (4), not shown here, is on a curve with the upper godets (3) in order to avoid collisions with the lower godets (2) - Or circular section path (7), moved upwards and each individual thread (1) threaded into the associated interlacer (8), as shown in the end position shown. The sliding door (11) can then be pushed in front of the housing (10).

4 shows a top view of the belt drives, now in the operating mode. The representation is with the indicated thread course. The upper godets (3) have all been pivoted upward on their pivotable godet unit (4) by means of the parallel pivoting gear (14), consisting of two pivoting levers (15) and a pneumatic drive (not shown) on a cam track (7). The two toothed belts (9, top) or (12, bottom) for the two groups of godets and the belt guidance over the deflection rollers (17) can be seen more clearly here.

For a general overview, FIG. 5 shows a section through an exemplary parallel spinning operation in a back-to-back arrangement with two winders (16):

The threading situation is shown on the left in the illustration: the thread (1) coming from the upper thread guide (5) is inserted into the thread guide of the traversing triangle (6) using a threading gun (18). The godet unit (4) with the upper godets (3) has previously been pivoted downwards by means of the parallel swivel gear (14) consisting of two swivel levers (15). The arrangement of the godet unit (4) with respect to the spinning wall (13), which is offset in terms of the depth of the room, is clearly visible, while the godets (2; 3) themselves all lie in the thread plane.

The operating mode is shown on the right: The thread (1) runs in one plane from the upper thread guide (5) via the godets (2; 3) into the thread guide of the traversing triangle (6) to the winder (16). The godet unit (4) has been pivoted upwards.

LIST OF REFERENCE NUMBERS

1.

thread

Second

lower godet

3:

upper godet

4th

movable godet unit

5th

upper thread guide

6th

Thread guide of the traversing triangle

7th

Curve or circular section path

8th.

interlacer; Fadenverwirbelungsvorrichtung; Tengeldüse

9th

Timing belt, top

10th

casing

11th

sliding door

12th

Timing belt, below

13th

Spin wall; Assembly unit for the lower godets

14th

Parallel swinging gear

15th

pivoting lever

16th

winders

17th

guide rollers

18th

mooring gun

Claims (5)

1. A parallel spinning process for the production of filaments and threads from polymer melts, whereby the threads are formed from merged filaments and are drawn over pairs of galettes, and each individual thread (1) in the operating state runs through a thread intermingling device (8), which for each individual thread (1) is located between a pair of galettes assigned to it, whereby the pair of galettes consists of a lower galette (2) and an upper galette (3), which in each case can be regulated in their speed of rotation for the adjustment of the tension of the thread, and in the laying mode, i.e. before the operating state, all the upper galettes (3), which are assembled in a movable galette unit (4), are still located in a position beneath the lower galettes (2), and thereafter all the upper galettes (3) are moved into their position for the operating state above the galettes (2), so that then each individual thread (1) lies on the galette (2) and (3) assigned to it, in each case with a wrapping or looping angle from 85° to 200°, for preference 175° to 185°, characterised in that, in the laying mode, at the displacement of the upper galettes (3) into their position for the operating state above the lower galettes (2) along a curved path, each individual thread (1) is threaded automatically into a thread intermingling device (8) pertaining to it and is guided through it, and the lower galettes (2) and the upper galettes (3) are in each case assembled in groups and are driven and speed-regulated in common, whereby, however, both groups can in each case be regulated in their revolution speeds separately and independently of one another.
2. The parallel spinning device for the production of filaments and threads from polymer melts, whereby the threads are formed from merged filaments and are drawn over pairs of galettes, whereby each individual thread (1) in the operating state initially runs by at a first lower galette (2), then at a thread intermingling device (8) assigned to it, and then via a second upper galette (3), whereby the second upper galette (3) in the laying mode, i.e. before the operating state, is mounted so as to be capable of displacement out of a position beneath the first lower galette (2) into a position above the first lower galette (2), whereby each thread then lies on a lower (2) and an upper (3) galette, allocated to it, in each case at a wrapping or looping angle from 85° to 200°, for preference 175° to 185°, characterised in that the lower galettes (2) and the upper galettes (3) are in each case assembled in groups and are driven and speed-regulated in common, whereby the upper galettes (3) in the laying mode can be displaced on a movable galette unit (4) by means of a pivot drive on a curved path, so that each individual thread is threaded into and guided through a thread intermingling device allocated to it.
3. The parallel spinning device according to Claim 2, characterised in that the bearings and drive units for the upper galettes (3), which are assembled in groups on a galette unit (4) and driven in common, and the bearings and drive units for the lower galettes (2), which are likewise assembled on a mounting unit, the spinning wall (13), and are driven in common, are arranged offset to one another in spatial depth, while the galettes (2, 3) themselves all lie in the plane of the thread.
4. The parallel spinning device according to one of the foregoing Claims 2 or 3, characterised in that the thread guides of the traversing jig triangle (6) are assembled in a common mounting unit, and are designed to be movable.
5. The parallel spinning device according to one of the foregoing Claims 2 to 4, characterised in that for every two winders (18) in each case, one galette unit (4) and one spinning wall (13), as well as the parallel pivot drives (14) allocated to them, are designed to be in a mirror image, one in left-hand format and one in right-hand format, so that a back-to-back arrangement of the spinning walls (13) can be effected, together with the galettes (2,3) pertaining to them, the galette units (4), and the parallel pivot drives (14), for winders (16) of the same structural design.