EP1855974B1 - Winding machine - Google Patents

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

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 such as from WO2004 / 015173 and the WO2004 / 074155 known.

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

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 winding 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. At such deflections and deflections To obtain no significant changes in the physical properties of the threads, must be complied with in the transition areas certain deflection angle, in particular at the externally guided threads. In the winding of the threads is aggravating added that any friction on the thread deflection leads to increase the yarn tension and thus affects the winding tension when winding the thread on the coil.

In order to produce in each of the winding units qualitatively equivalent threads as well as same coils, is with the EP 0 845 550 A1 proposed an embodiment of such a winding 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.

The object is achieved by a winding machine characterized in that the head thread guides the winding units, which lead a deflection of the incoming thread substantially from a slightly above the level of the head thread guide arranged horizontal plane, each formed by a freely rotatable guide roller, whose roller axes are erected substantially orthogonal to the winding spindle.

The invention is also not according to the invention, the thread wraps around the guide rollers approximately 90 °. suggested that it is basically known in the prior art to supply the incoming yarn on a winding device with a winding unit via a guide roller, such as from DE 1 760 990 It is known, the leadership role of the winding unit is assigned such that the roller axis and the winding spindle are parallel to each other. However, such an arrangement has the disadvantage that the traversed within a traverse thread back and forth on the circumference of the guide roller is also reciprocated in a partial area, Thus, additional measures must be taken so that the thread does not fall from the scope of the guide roller, such as for example from the DE 42 25 690 A1 is known.

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.

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 is 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 yarn tension and thus an almost slip-free thread guide on the circumference of the guide roller.

According to the invention, the guide rollers each have on their circumference a groove-shaped guide track 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.

The design of the winding machine according to the invention is particularly advantageous, in which an even number of winding units is provided

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 and the technical environment will be explained in more detail with reference to the accompanying figures.

Fig. 1

schematisch eine Seitenansicht einer Aufspulmaschine

Fig. 2

schematisch eine Vorderansicht der Aufspulmaschine aus Fig. 1

Fig. 3

schematisch der Fadeneinlauf in einer der Spulstellen der Aufspulmaschine aus Fig. 1

Fig. 4

schematisch eine Querschnittsansicht eines Ausführungsbeispiels einer Führungsrolle

Fig. 5

schematisch eine Seitenansicht eines Ausführungsbeispiels der erfindungsgemäßen Aufspulmaschine

Show it:

Fig. 1

schematically a side view of a winding machine

Fig. 2

schematically a front view of the winding machine Fig. 1

Fig. 3

schematically the thread inlet in one of the winding units of the winding machine Fig. 1

Fig. 4

schematically a cross-sectional view of an embodiment of a guide roller

Fig. 5

schematically a side view of an embodiment of the winding machine according to the invention

In the Fig. 1 and 2 a winder is shown in several views. Unless an explicit reference is made to one of the figures, the following description applies to both figures.

The winding machine 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 is described on the basis of the first to a control side winding unit 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, for example, by a Kehrgewindechangierung, in which a traversing yarn guide back and forth within a traverse stroke, or a Flügelchangierung with several oppositely driven wingtips, 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.

For winding the yarn 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.

At the in Fig. 1 and 2 shown winding 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 centered 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 wrap around the guide rollers 11.3 and 11.4 of the winding stations 1.3 and 1.4 in the counterclockwise direction. 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 1 to 1.4 substantially slip-free.

By the downstream traversing means 4, the threads are moved back and forth in each of the winding units 1.1 to 1.4 and wound to a cross-wound bobbin on the winding spindle 6.1

The example of the winding unit 1.1 is below in the FIG. 3 the arrangement of the guide roller relative to the traversing means shown schematically. 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 embodiment, the guide rollers 11.1 is arranged with its roller axis 15 offset from the mid-perpendicular 19. The offset is in Fig. 3 marked with 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 substantially 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 a minimum 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 adjusts to the middle of the traverse stroke during the course of the thread 2.1 must comply with 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: a> 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.

At the in Fig. 1 Spooling machine shown the distances between the guide roller 11.1 to 11.4 and the traversing means 4 are kept the same, so that all the guide rollers 11.1 to 11.4 are in a plane which extends parallel to the traversing plane defined by the traversing reversal points. This is at identical stroke lengths the traverse strokes same coil widths wrapped in individual winding units 1.1 to 1.4. However, for the variation and adjustment of certain wrapping conditions, there is the possibility that in each of the winding units 1.1 to 1.4 the offset V is formed differently between a mid-perpendicular of the winding unit and the roller axis of the guide roller. 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 embodiment of a guide roller, as for example in the winding units of the embodiment according to Fig. 1 can be used is in a cross-sectional view in Fig. 4 shown schematically.

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.

In Fig. 5 an embodiment of a winding machine according to the invention with a total of five winding units is shown. Here, the winding units 1.1 to 1.5 are identical to the embodiment according to Fig. 1 Likewise, the arrangement and the attachment of the individual units within the winding machine identical to the previous embodiment according to Fig. 1 , so that reference can be made to the above description and only the differences are explained here.

At the in Fig. 5 illustrated embodiment, the winding units are 1.1 to 1.5 assigned to a guide means 14 at the front end of the winding machine. The guide means 14 is formed in this case by a simply looped godets 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 requires only one parent for the spinning device floor. Such a spinning device is for example from the WO 2004/015173 A1 known, so that at this point on the aforementioned document reference can be made.

This in Fig. 5 illustrated embodiment of the winding machine according to the invention is exemplary in construction and arrangement of the winding units.

In principle, the traversing means of all winding units can be driven together.

LIST OF REFERENCE NUMBERS

1.1 ... 1.5

winding station

2.1 ... 2.5

thread

3

Yarn guide

4

Traversing means

5

pressure roller

6.1,6.2

winding spindle

7

spindle turret

8.1 ... 8.5

Kitchen sink

9

winding tube

10

machine frame

11.1 ... 11.5

leadership

12

carrier

13

wing

14

guide means

15

roller axis

16

guide sheath

17

air bearing

18

air supply

19

Perpendicular bisector

20.1, 20.2

Traversing reversal points

21

guideway

22

collar

23

wear coating

24

Galette

25

Guide roll

26

Traversing thread guide

Claims (7)

1. A winding machine with a plurality of bobbin stations (1.1, 1.2) for winding a plurality of threads (2.1, 2.2) into bobbins (8.1, 8.2), the threads (2.1, 2.2) being supplied via a guide means (14), which is formed by a singly looped godet (24) on the end face of the winding machine, the bobbins (8.1, 8.2) being held next to one another on a rotatable winding spindle (6.1), and each bobbin station (1.1, 1.2) having a traversing means (4) for guiding the thread back and forth and a head thread guide (3) preceding the traversing means (4), characterized in that the head thread guides (3) of the bobbin stations (1.1, 1.2), which effect a deflection of the in-running thread essentially out of a horizontal plane arranged only insignificantly above the plane of the head thread guides (3), are formed in each case by a freely rotatable guide roller (11.1, 11.2), the roller axes (15) of which are oriented essentially orthogonally to the winding spindle (6.1), that the guide rollers (11.1, 11.2) have in each case on the circumference a groove-shaped guide track (21) in which the in-running thread is guided, and that at least the region of the guide track (21) on the circumference of the guide roller (11.1) has a wearing coating (23) and the thread entwines the guide rollers (11.1, 11.) for approximately 90°.
2. The winding machine as claimed in claim 1, characterized in that, within the bobbin station (2.1), the guide roller (11.1) is arranged with the roller axis (15) offset with respect to a mid-perpendicular (19) of the bobbin station (2.1).
3. The winding machine as claimed in claim 2, characterized in that the offset (V) between the mid-perpendicular (19) and the roller axis (15) is equal to half the diameter of the guide roller (11.1).
4. The winding machine as claimed in one of claims 1 to 3, characterized in that the guide rollers (11.1, 11.2) have in each case a guide casing (16) which is held on the roller shaft (15) by means of an air mounting (17).
5. The winding machine as claimed in one of the abovementioned claims, characterized in that an even number of bobbin stations (1.1 - 1.4) is provided.
6. The winding machine as claimed in one of the claims 1 to 4, characterized in that an even number or an odd number of bobbin stations (1.1 - 1.5) is provided, a guide means (14), arranged above the guide rollers (11.1 - 11.5), for supplying the thread group being held in the end regions of the bobbin stations (1.1 - 1.5).
7. The winding machine as claimed in one of claims 1 to 6, characterized in that the guide rollers (11.1 - 11.4) of the bobbin stations (1.1 - 1.4) are arranged in a plane which is parallel to a traversing plane including the traversing reversal points (20.1, 20.2).

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