EP1855974A1

EP1855974A1 - Winding machine

Info

Publication number: EP1855974A1
Application number: EP06723092A
Authority: EP
Inventors: Helmut Weigend; Michael SCHRÖTER
Original assignee: Oerlikon Textile GmbH and Co KG; Saurer GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2005-03-01
Filing date: 2006-02-23
Publication date: 2007-11-21
Anticipated expiration: 2026-02-23
Also published as: CN101128377A; JP5156401B2; CN101128377B; EP1855974B1; WO2006092237A1; DE102005009342A1; JP2008531438A

Abstract

The invention relates to a winding machine comprising a plurality of winding heads (1.1, 1.2, 1.3, 1.4) for winding a plurality of threads into coils. Said coils are adjacently held on rotatable winding spindles (6.1). In order to wind the coils, each winding head comprises a traversing means (4) for guiding the thread back and forth, and a top thread guide (3) arranged upstream of the traversing means. The aim of the invention is to obtain a homogenisation of the thread tensions despite various deviations during the supply of the thread to the winding heads. To this end, the top thread guides of the winding heads, which guide a deviation of the thread to be supplied, are respectively formed by a freely rotatable guiding roll (11.1, 11.2, 11.3, 11.4). The axles of the guide rolls are oriented essentially orthogonally in relation to the winding spindles.

Description

winding machine

The invention relates to a winding machine with a plurality of winding units for winding a plurality of threads into coils according to the preamble of claim 1.

A generic winding machine is known, for example, from EP 0 845 550 A1.

Such winding machines are used for winding freshly spun synthetic threads. The synthetic threads are previously extruded in a spinning device in parallel side by side from a polymer melt to a plurality of filament strands, cooled and bundled. Subsequently, the threads are guided parallel in a treatment device preferably via godet systems to be wound in the end in the winding machine parallel to coils. The threads are guided from melt spinning to winding at different distances from each other. Thus, in each case a spinning distance is held in the spinning device between the threads, which is essentially due to the nozzle divisions of the spinneret packets. After cooling, the threads are brought together to be passed through the treatment device together at a much smaller treatment distance. The treatment distance is maintained substantially until before entering the winding machine between the threads. In the tracking machine, a winding spacing between the threads is to be observed, which is essentially due to the winding widths of the coils of the individual winding units. The group of threads is thus spread apart from the treatment distance to the winding spacing. In the transition region between the spinning device and the treatment device and between the treatment device and the winding machine thus yarn guide means are provided which allows a deflection or deflection of the individual threads. In order to avoid such deflections and deflections In order not to obtain any significant changes in the physical properties of the threads, certain deflection angles, in particular at the outer threads, must be maintained in the transition regions. When the threads are wound up, it is aggravated that any deflection bearing on the thread causes the thread tension to increase and thus influences the winding tension when the thread is wound on the spool.

In order to produce qualitatively equivalent threads as well as identical coils in each of the winding units, EP 0 845 550 A1 proposes a design of such a dishwashing machine in which each of the threads is assigned a delivery mechanism for influencing the thread tension. In this case, the delivery mechanisms are formed by driven rollers in order to be able to set a specific thread tension on each of the threads, which each have an individual position-dependent history. Such systems are preferably used in spinning device without additional godet guides. In the event that the threads are previously performed in the treatment facility via a godet system, the delivery plants represent an additional expenditure on equipment.

It is an object of the invention to develop a winding machine of the generic type such that a supplied from a treatment device and spread yarn sheet as possible can be supplied to the winding units without significant differences in thread tension.

Another object of the invention is to provide a winding machine which can be associated with a treatment device without substantial distance.

According to the invention, the object is achieved by a winding machine in that the head thread guides of the winding stations, which guide a deflection of the tapered thread, are each formed by a freely rotatable guide roller, whose roller axes are aligned substantially orthogonal to the winding spindle.

The invention is also not suggested by the fact that it is generally known in the prior art to supply the incoming thread via a guide roller on a winding device with a winding station, as is known from DE 1 760 990, for example. The guide roller of the winding unit is assigned such that the roller axle and the winding spindle are parallel to each other. However, such an arrangement has the disadvantage that the yarn guided back and forth within a traversing stroke is likewise guided back and forth in a partial region on the circumference of the guide roller. Thus, additional measures must be taken so that the thread does not fall off the circumference of the guide roller, as is known for example from DE 42 25 690 Al.

In the winding machine according to the invention, the traversing plane in which the thread is guided back and forth, represents a radial plane of the guide roller, so that in each of the winding units a secure thread guide on the guide roller is possible. The traversing movement of the thread only leads to a change in the wrap angle at the freely rotatably guided guide roller.

The winding machine according to the invention has the particular advantage that in each of the winding units of the supplied yarn is supplied to the winding units substantially frictionless. In this case, caused by the bearing friction of the guide rollers thread tension structure is essentially the same at each of the winding units.

Advantageous developments of the winding machine according to the invention are defined by the features and feature combinations of the subclaims.

In particular, the design of the winding machine is advantageous in which the guide rollers are arranged within the winding unit such that the deflection of the running to the middle of the traverse stroke thread a Mindestum- loop at the circumference of the guide roller with an angle α> arctan H / 2A, where H defines the length of the traverse stroke and A the distance between the guide roller and a traversing plane spanned by the traversing reversal points. This ensures that even with long traverse strokes the thread receives sufficient guidance of the thread on the guide roller. The Mindestumschlingung on the circumference of the guide roller is preferably selected such that substantially no speed drop occurs at the conveyor roller, so that the incoming thread is guided without significant slippage on the circumference of the guide roller.

In order to be able to influence the degree of wrap around the guide roller, the guide roller is preferably arranged with its roller axis offset to a mid-perpendicular of the winding station. Depending on the position of the winding unit and the degree of deflection of the supplied yarn, different arrangements of the guide rollers relative to the respective central axes of the winding units can be selected. Thus, it is also possible with advantage to realize minimum circumferential loops on the circumference of the guide roller in the case of threads with little deflection.

Preferably, the offset between the mid-perpendicular and the roller axis is selected equal to half the diameter of the guide roller, so that there is a thread discharge point on the guide roller, which lies on the mid-perpendicular.

The preferred embodiment of the winding machine, in which the guide rollers each have a guide shell, which is held by an air bearing on the roller axis, is characterized in that the threads can be wound with the lowest possible winding voltages to coils. The air bearing in the guide rollers leads to a relatively low bearing friction, which allows a very low thread tension and thus an almost slip-free Fadenfüh- rang on the circumference of the guide roller. For the stability of the yarn path in the winding units particularly the development of the winding machine is used, in which the guide rollers each have on the circumference a groove-shaped guide rail in which the tapered thread is guided. In this case, at least the region of the guideway is protected by a wear coating on the circumference of the guide roller, so that premature signs of wear on the circumference of the guide rollers are avoided.

In the event that the group of threads is fed by a guide means associated with the treatment center of the winding machine, the training düng the winding machine according to the invention is particularly advantageous, in which an even number of winding units is provided, and wherein the guide means is held centrally to the winding units , Thus, the feeding of the threads to the individual winding stations requires in each case a spreading and thus a deflection of the thread in the winding stations, so that each of the winding stations is formed with a guide roller.

In order to comply with the smallest possible distances between the winding unit and a treatment device, the development of the winding machine according to the invention is particularly advantageous, in which an even number or an odd number of winding units is provided, and in which an above the guide rollers mounted guide means for guiding the yarn sheet is held in the end regions of the winding units.

In order to obtain a coil width as constant as possible on the bobbins in each of the winding units, the guide rollers of the winding units are preferably arranged in a plane which extends parallel to the oscillating plane.

The winding machine according to the invention will be explained in more detail below with reference to some embodiments with reference to the accompanying figures. Show it:

1 is a schematic side view of a first embodiment of a winding machine according to the invention; FIG. 2 is a schematic front view of the embodiment of FIG. 1; FIG

Fig. 3 shows schematically the thread inlet in one of the winding units of the embodiment of Fig. 1 Fig. 4 shows schematically a cross-sectional view of an embodiment of a

Guide roller Fig. 5 shows schematically a side view of another embodiment of the winding machine according to the invention

In Figs. 1 and 2, a first embodiment of the winding machine according to the invention is shown in several views. Unless an explicit reference is made to one of the figures, the following description applies to both figures.

The embodiment of the winding machine according to the invention has a total of four winding units 1.1, 1.2, 1.3 and 1.4, which are formed side by side in the winding machine (Fig. 1). In each of the winding units 1.1 to 1.4, a thread is fed in each case and wound into a coil. The structure of the winding units 1.1 to 1.4 is identical, so that the basic structure will be described on the basis of the winding side to a first operating side 1.1.

The winding unit 1.1 has a traversing means 4, through which a supplied thread 2.1 is guided back and forth within a traverse stroke. The traversing means could zen, for example, by a Kehrgewindechangierung in which a traversing yarn guide within a traverse stroke and forth, or a Flügelchangierung with several oppositely driven Flügelspit- zen, the thread leading back and forth. The traversing means 4 is a Head thread guide 3 upstream, which forms the tip of a so-called traversing triangle. The head thread guide 3 form the inlet into the winding unit 1.1.

To wind the thread 2.1 in the winding unit 1.1, a winding tube 9 is clamped on the circumference of a driven winding spindle 6.1. The winding spindle 6.1 extends over all adjacent winding units 1.2, 1.3 and 1.4, so that in each winding unit 1.1 to 1.4, the supplied yarns 2.1 to 2.4 are wound simultaneously.

For depositing the thread 2.1 on the surface of the spool 8.1 in the winding unit 1.1, a pressure roller 5 is arranged between the traversing means 4 and the winding spindle 6.1. The pressure roller 5 also extends over the entire length of the winding units 1.1 to 1.4. The thread 2.1 is placed after Teilumschlingung on the circumference of the pressure roller 5 on the surface of the coil 8.1.

In the winding units 1.1 to 1.4, the head thread guides are each formed by freely rotatably mounted guide rollers 11.1 to 11.4. The guide rollers 11.1 to 11.4 are aligned in the winding units 1.1 to 1.4 respectively with their roller axes orthogonal to the winding spindle 6.1. The guide rollers 11.1 to 11.4 are held on a support 12, which is connected to a machine frame 10.

The machine frame 10 serves to receive and fix the traversing means 4, the pressure roller 5 and the winding spindle 6.1. In this embodiment, the pressure roller 5 is held by a rocker 13 pivotally mounted on the machine frame 10. The winding spindle 6.1 is cantilevered in a winding turret 7, which is rotatably held in the machine frame 10. The Spulrevolver 7 holds offset by 180 ° to the winding spindle 6.1 a second winding spindle 6.2 in order to perform a continuous winding of the threads in the winding units 1.1 to 1.4 can. The winding turret 7 and the winding spindles 6.1 and 6.2 each drives (not shown here) are assigned. In the embodiment of the winding machine according to the invention shown in Fig. 1 and 2, a yarn sheet consisting of the four threads 2.1 to 2.4 is fed via a guide means 14 of the winding machine. The guide means 14, which belongs to a treatment device (not shown here), is in this case formed by a godet unit with a driven godet 24 and an overflow roller 25. At the godet unit, the threads 2.1 to 2.4 with a small distance from each other, the so-called treatment distance, out. The guide means 14 is arranged centrally to the winding units 1.1 to 1.4, so that the spreading of the threads 2.1 to 2.4 takes place centrally to the winding units 1.1 to 1.4, so that the threads 2.1 and 2.4, the associated guide rollers 11.1 and 11.2 of the winding units 1.1 and 1.2 wrap around in a clockwise direction and the threads 2.3 and 2.4, the guide rollers 11.3 and 11.4 of the winding units

Loop around 1.3 and 1.4 counterclockwise. The guide rollers 11.1 and 11.2 are thus driven in a clockwise direction and the guide rollers 11.3 and 11.4 in the counterclockwise direction by the looping friction of the threads. The guide rollers reach a peripheral speed which is substantially equal to the thread speed, so that the threads are supplied to the winding units 1.1 to 1.4 substantially slip-free.

By the downstream traversing means 4 is in each of the winding units 1.1 to

1.4 moved the threads back and forth and wound to a cross-wound bobbin on the winding spindle 6.1.

The arrangement of the guide roller relative to the traversing means is schematically illustrated below in the example of the winding unit 1.1 in FIG. The guide roller 11.1 is arranged at a distance A above the traversing means 4. The traversing means 4, which could be, for example, an oscillatingly driven traversing yarn guide 26 or a plurality of oppositely driven wing tips of a Flügelchangierung leads the running of the guide roller 11.1 thread 2.1 within a traverse stroke with the length H back and forth. The traversing reversal points 20.1 and 20.2 indicate the thread reversal at the ends of the traverse stroke. The center of the traverse stroke is characterized by a perpendicular bisector 19, which essentially defines the center of the winding unit 1.1. In this exemplary embodiment, the guide roller 11.1 is arranged with its roller axis 15 offset from the mid-perpendicular 19. The offset is indicated in Fig. 3 by the letter V. The offset V is in this case equal to half the diameter of the guide roller 11.1, so that the thread 2.1 leaves the guide roller 11.1 on the perpendicular bisector 19.

From the dashed thread positions at the stroke ends it can be seen that the Fadenumschlingung changed on the guide roller 11.1. The yarn 2.1 moves essentially in a radial plane to the guide roller 11.1, wherein the feed to the traversing point 20.1 causes a maximum looping and the inlet to the traversing point 20.2 causes a minimal wrap around the guide roller 11.1. In order to prevent lifting of the thread from the circumference of the guide roller 11.1, in particular at the infeed to the traversing reversal point 20.2, a minimum wrap angle is maintained during the deflection of the thread 2.1 at the circumference of the guide roller 11.1. The Mindestumschlingungswinkel α, which is set at the end of the thread 2.1 to the middle of the traverse stroke, must respect a minimum value in relation to the length of the traverse stroke H and the distance A between the guide roller 11.1 and the traversing means 4. The following applies: α> arctan H / 2A

It has been found that a minimum wrap of α = 10 ° + arctan H / 2A has been found to be sufficient to ensure safe guidance.

In the embodiment of the winding machine according to the invention shown in Fig. 1, the distances between the guide rollers 11.1 to 11.4 and the traversing means 4 are kept equal, so that all guide rollers 11.1 to 11.4 are in a plane which is parallel to the points defined by the traversing Traversing plane extends. With identical stroke length gene the traverse strokes same coil widths wound in individual winding units 1.1 to 1.4. For the variation and adjustment of certain wrap conditions, however, there is the possibility that in each of the winding units 1.1 to 1.4 the offset V between a mid-perpendicular of the winding unit and the roller axis of the guide roller is designed differently. For example, the offset of the guide roller 11.3 and 11.4 mirror-offset to the offset of the guide roller 11.1 and 11.2 is formed.

An exemplary embodiment of a guide roller, as would be used, for example, in the winding stations of the exemplary embodiment according to FIG. 1, is shown schematically in a cross-sectional view in FIG. 4.

The guide roller is formed by a guide casing 16 and a roller axle 15. The guide casing 16 is mounted on the roller axle 15 via an air bearing 17. For this purpose, the roller axle 15 an air supply 18, through which a compressed air in the bearing gap between the guide casing 16 and the roller shaft 15 is passed. The roller axle 15 is fixed to a support 12.

The guide casing 16 has on the circumference a groove-shaped guide track 21, which is limited to one end by a collar 22. The guide track 21 on the circumference of the guide casing 16 has a wear coating 23. Within the guide track 21, the thread is guided.

FIG. 5 shows a further exemplary embodiment of a winding machine according to the invention with a total of five winding stations. Here, the winding units 1.1 to 1.5 are identical to the embodiment of FIG. 1 is formed. Likewise, the arrangement and attachment of the individual units within the winding machine is identical to the previous embodiment of FIG. 1, so that reference may be made to the above description and at this point only the differences will be explained. In the embodiment shown in FIG. 5, the winding units 1.1 to 1.5 are assigned a guide means 14 at the front end of the winding machine. The guide means 14 is in this case formed by a simply looped godet 24, on which the threads are guided. The distribution of the threads takes place here essentially from a horizontal plane, which are arranged only slightly above the plane of the guide rollers 11.1 to 11.5. At each of the guide rollers 11.1 to 11.5 thus approximately an encircling of about 90 ° is achieved. Such an arrangement has the particular advantage that very compact spinning devices can be produced, which essentially only requires a higher-level floor for the spinning device. Such a spinning device is known, for example, from WO 2004/015173 A1, so that reference may be made at this point to the aforementioned publication.

The embodiments of the winding machine according to the invention shown in FIGS. 1 and 5 are exemplary in the construction and arrangement of the winding units. ^"

In principle, the traversing means of all winding units can be driven together. In addition, depending on the upstream supply means of the treatment device, a combination between different head thread guides is also possible. Thus, for example, the head thread guides on which the tapered threads are guided only with very little deflection by conventional guide means such as a Sauschwanzfaden- leader and adjacent head thread guide form by leadership. It is essential here that the same properties and the same yarn tensile forces act on each of the yarns supplied to the winding units. Reference list

1.1 ... 1.5 winding unit

2.1 ... 2.5 threads

3 head thread guides

4 traversing means

5 pressure roller

6.1, 6.2 Winding spindle

7 spool turrets

8.1 ... 8.5 coil

9 winding tube

10 machine frame

11.1 ... 11.5 Leadership

12 carriers

13 swingarm

14 guiding means

15 roller axle

16 guide sheath

17 air storage

18 air supply

19 perpendicular

20.1, 20.2 traversing reversal points

21 guideway

22 collar

23 wear coating

24 galette

25 Overflow roller

26 traversing thread guide

Claims

claims

1. Aufspulniaschine with several winding units (1.1, 1.2) for winding a plurality of threads (2.1, 2.2) to coils (8.1, 8.2), wherein the coils (8.1, 8.2) on a rotatable winding spindle (6.1) are kept side by side and wherein each winding unit (1.1, 1.2) has a traversing means (4) for reciprocating the thread and a head threading guide (3) preceding the traversing means (4), characterized in that the head thread guides (3) of the winding heads (1.1, 1.2), which guide a deflection of the tapered thread, each by a freely rotatable guide roller (11.1, 11.2) are formed, the roller axes (15) are aligned substantially orthogonal to the winding spindle (6.1).

2. Winding machine according to one of claims 1, characterized in that the guide rollers (11.1, 11.1) within the winding units (1.1, 1.2) are arranged such that the deflection of the converging to the center of the traverse thread a minimum wrap around the circumference of the guide roller (11.1, 11.2) with an angle α> arctan H / 2A, where H defines the length of the traverse stroke and A the distance between the guide roller (11.1, 11.2) and a traversing plane spanned by the traversing reversal points (20.1, 20.2).

3. Winding machine according to claim 1 or 2, characterized in that within the winding unit (2.1) the guide roller (11.1) with the roller axis (15) offset from a bisector (19) of the winding unit (2.1) is arranged.

4. Winding machine according to claim 3, characterized in that $ * the offset (V) between the perpendicular bisector (19) and the Ro 6 001663

lenachse (15) is equal to half the diameter of the guide roller (11.1).

5. Winding machine according to one of claims 1 to 4, character- ized in that the guide rollers (11.1, 11.2) each one

Guide shell (16) which is held by an air bearing (17) on the roller axis (15).

6. Winding machine according to one of claims 1 to 5, character- ized in that the guide rollers (11.1, 11.2) each have on the circumference a groove-shaped guide track (21), in which the tapered thread is guided.

7. Winding machine according to claim 6, characterized in that at least the region of the guide track (21) on the circumference of the guide roller (11.1) has a wear coating (23).

8. Winding machine according to one of the preceding claims, characterized in that an even number of winding units (1.1 - 1.4) is provided, one above the guide rollers

(11.1 - 11.4) arranged guide means (14) for feeding the yarn sheet is held centrally to the winding units (1.1 - 1.4).

9. Winding machine according to one of claims 1 to 7, character- ized in that an even number or an odd number of winding units (1.1 - 1.5) is provided, wherein a above the guide rollers (11.1 - 11.5) arranged guide means (14) for Feeding the yarn sheet in the end of the winding units (1.1 - 1.5) is held. 6 001663

10. Winding machine according to one of claims 1 to 9, characterized in that the guide rollers (11.1 - 11.4) of the winding units (1.1 - 1.4) are arranged in a plane parallel to a traverse the traversing points (20.1, 20.2) traversing plane is.