EP1824769B1 - Winding machine - Google Patents

Abstract

The invention relates to a winding machine which is used to wind continuously supplied threads. The winding machine winds a plurality of threads (1) onto spools (6) which are secured to the spool spindle (7.1, 7.2). The threads (1) are displaced back-and-forth by a changing device (4.1) in a changing thread feeder (4.2). The spool spindle (7.1, 7.2) is supported by a rotating plate (8) which is also rotated when the spool diameter increases. The increase in the diameter of the spool diameter is detected by a press roll (5) which is mounted in a displaceable manner such that an alternative displacement can take place when the diameter increases. Said alternative displacement is detected and the rotating plate (8) is rotated again by means of a control device (18).The alternative displacement of the press roll (5) takes place by means of a slot (15) or a link (10). The displacement vectors (13.1) of the alternative displacement and the thread path form a small angle. As a result of the alternative displacement, the thread (1) does not undergo any lateral displacement. The friction-ratio remains constant in the back-and-forth changing thread feeder (4.2).

Description

The invention relates to a winding machine according to the preamble of claim 1.

A generic winding machine and a method for operating such a winding machine is from the published patent application DE 103 03 641 A1 known. Winding machines serve to wind several continuous filaments into coils. For this purpose, the threads are first changed by a traversing device transversely to the thread running direction. For this purpose, the traversing device has a number of thread guides corresponding to the number of threads running, which change the threads in the traversing direction. Subsequently, the threads are guided over a rotating pressure roller. The pressure roller sets the threads on each of the wound coils to be wound. Several coils are arranged in alignment one behind the other on a common winding spindle. This makes it possible to wind several threads at the same time.

With increasing coil diameter, the distance between the winding spindle and the pressure roller must be increased continuously. This is done in that the winding spindle is arranged on a turntable whose axis of rotation is parallel to the axis of rotation of the winding spindle. In addition, the turntable provides a second winding spindle available, which is filled with full bobbins with empty bobbin tubes and replaced by a rotation of the turret against the winding spindle with the full bobbins.

In order to recognize the increase of the coils during winding, the pressure roller is mounted on a holder, which is designed to be movable in the direction of the coil growth. In this case, the rotation of the revolver is controlled by a control device, that an evasive movement of the holder is compensated by the revolver rotation.

In the published patent application DE 103 03 641 A1 For this purpose, the holder in the form of a rocker rotatably connected to the housing of the winding machine. The swing-shaped holders are widely known from the prior art. All known solutions have in common that the rocker arm seen in the direction of yarn running obliquely downwards. This embodiment is based on the objective to achieve a contact angle of the pressure roller over the coil over a wide diameter range of the coil and thus over a wide rotational angle range of the rotor, which is as orthogonal as possible to Berührungsangente. However, this has the consequence that even small evasive movements of the rocker deflect the yarn transversely to the thread running direction and the traversing direction. It has been recognized that this deflection movement leads to variable and thus unfavorable friction and guidance conditions in the traversing yarn guides guided by the traversing device; in extreme cases also to a jumping out of the thread from the traversing yarn guide.

Furthermore, from the DE 39 09 106 A1 a winding machine with a bobbin revolver, are stored on the two winding spindles. Furthermore, from this document contact rollers are known, which touch on the winding spindles located coils and are attached to a movable rocker.

It is therefore an object of the invention to develop a winding machine of the aforementioned type such that a deflection movement of the pressure roller is possible without causing a change in the yarn guide direction in the traversing yarn guide.

This object is achieved by a winding machine according to claim 1, wherein the vector of the deflection movement of the pressure roller from its middle working position parallel or only at a small angle to the direction of the thread, which it has in the region between the traversing and the pressure roller occurs. This ensures that the threads also in different positions of the pressure roller under the same inlet and outlet conditions in the traversing yarn guide and run out.

It has surprisingly been found that the angle at which the pressure roller is pressed onto the coil circumference, for the quality of the coil and the wound yarn is less crucial than the entry and exit angle of the thread in the yarn guide of traversing. This knowledge has finally made it possible to optimize the geometry according to the now changed viewpoints. The contact angle between the coil and pressure roller remains as a subordinate optimization criterion. Thus, with the geometry according to the invention, angles are still possible under which the pressure roller is pressed onto the circumference of the coil, which only change in the course of winding in a small area.

Due to the flat course of the cosine function in the range of 0 ° are embodiments of the invention with small inlet angles of up to 10 ° in the context of the invention.

For example, if the rocker arm according to the prior art in its center position inclined by 30 ° relative to the thread running direction, so an evasive movement of the pressure roller causes the thread is deflected by 13% of the evasive movement. An evasive movement of the pressure roller results in only 10% deflection at 10 ° inlet angle. This represents a considerable improvement over the above-mentioned 13% deflection. Smaller angles of incidence of less than 5 ° or better of less than 2 ° better meet the idea of the invention with a deflection close to 0% and are therefore preferred.

By varying the Aufspulmaschinengeometrie, in particular the distance between the turntable and rocker, it can be achieved that the Berührangente between pinch roller and coil deviates in the course of Aufspulvorganges only a small amount from the horizontal. These are plus or minus 20 °, in a preferred embodiment plus or minus 10 °.

According to the invention, the pressure roller is guided in a rocker, the fulcrum is arranged in the height of the feed point of the yarn on the pressure roller and thus the axis of rotation of the pressure roller. Small changes in the deflection angle of the rocker lead to negligible deflections of the yarn path transverse to the traverse, since the arc of the swing motion is very large compared to the amount of evasive movement, so that the trajectory of the evasive movement can be considered in good approximation as a straight-line movement. The arrangement of the pivot point of the rocker in the amount of the casserole point of the thread on the pressure roller is not suggested by the prior art, since according to the prior art, the traverse is attached to a cantilevered support directly to the housing. Thus, it is obvious for a skilled in the construction of a winding machine to connect the rocker with the cantilever and arranged above the coil carrier of the traversing or with a second own carrier on the pressure roller. This results according to the prior art in a logical consequence that the rocker arm viewed in the direction of yarn running obliquely downwards.

The lever arm of the rocker according to the invention is defined by the connecting line between the pivot point of the pressure roller and the pivot point of the rocker. The motion vector of the deflection movement of the pressure roller is perpendicular to the lever arm. Since now the thread running plane is approximately parallel to the deflection movement of the pressure roller, it follows that the point of emergence of the thread on the pressure roller is located approximately on the above-described line of the lever arm. It follows that the inventive requirement that the angle α should be close to 0 °, is satisfied by an arrangement in which the axis of rotation of the rocker and the axis of rotation of the pressure roller are arranged in the yarn running direction approximately at the same height. This means that in a vertical yarn path, the axes of rotation are arranged horizontally in a plane. It follows from the geometrical contexts that a rocker with the longest possible lifting alarm to an evasive movement with less Changing the inlet angle leads and thus is preferable not to leave the range of the inlet angle according to the invention.
An embodiment will be described in more detail below with reference to the accompanying drawings.

Fig. 1

die Vorderansicht einer erfindungsgemäßen Aufspulmaschine,

Fig. 2

zur Erläuterung des Umfeldes der Erfindung die Vorderansicht einer alternativen nicht zur Erfindung gehörigen Ausführungsform einer Aufspulmaschine.

They show:

Fig. 1

the front view of a winding machine according to the invention,

Fig. 2

to illustrate the environment of the invention, the front view of an alternative not belonging to the invention embodiment of a winding machine.

In FIG. 1 a winding machine according to the invention is shown in front view. From a not shown here above the winding machine arranged thread-generating system is a group of yarn 1, which is shown in this view as a thread 1, fed continuously. If in this description of a thread 1 is spoken, this applies mutatis mutandis to several, in the plane of the drawing successively arranged threads 1. The tapered thread 1 is first of a traversing yarn 4.2, from a traversing device 4.1 in the direction of the plane back and forth is changed, led. The traversing device 4.1 is connected to a traversing housing 3, which is mounted cantilevered on the housing 2 of the winding machine. Subsequently, the oscillated thread is guided over a pressure roller 5. The peripheral speed of the pressure roller 5 corresponds to the yarn speed. The surface of the pressure roller 5 is such that the thread on the pressure roller 5 is applied without slipping on and after about a quarter turn on the coil 6 is placed. The coil 6 is clamped on a rotating winding spindle 7.1. Through the tapered thread 1, the coil 6 grows in diameter. This increase in diameter is now compensated as described below.

The pressure roller 5 is rotatably mounted by means of a rocker 10 on a projecting, connected to the housing 2 carrier 9. In order to achieve the best possible approximation to a rectilinear deflection movement of the rocker, the swing length is chosen as large as possible. An increasing diameter of the spool 6 initially leads to a deflection of the pressure roller 5. However, even slight deflection movement of the pressure rollers 5 are detected by a sensor 11 and fed to a control unit 18. This control unit 18 controls the turntable 8, which continues to rotate the winding spindle 7.1 in the illustrated direction of rotation. As a result, the pressure roller 5 can be returned to its original position. The control unit 18 is operated so that the deviations of the pressure roller 5 from its initial position are as low as possible. This requirement arises from the need to keep the distance between the traversing yarn guide 4.2 and the casserole thread 1 on the pressure roller 5 as constant as possible.

The turntable 8 is gradually further rotated during the further winding process by the control direction 18 until the final diameter of the coil 6 is reached. Then the turntable 8 is rotated until the completion of half a turn, so that the tapered thread 1 is guided over a spanned on the spindle spindle 7.2 sleeve, taken away from in this and wound up. The full bobbin on the now located winding spindle 7.1 below can now be removed and replaced by an empty tube. Notwithstanding the in FIG. 1 shown direction, the turntable 8 can in principle be further rotated and changed in the opposite direction.

The axis of rotation 12 of the rocker 10 and the axis of the pressure roller 5 are arranged here seen in the direction of yarn travel in approximately the same height. Due to the geometric conditions it follows that the point of curvature of the thread 1 on the pressure roller 5 is at the same height. This has the consequence that in a movement of the pressure roller described above, the thread, which is guided over the pressure roller, is deflected only by a very small amount transversely to its direction. The direction of movement of the pressure roller 5 in the region of the feed point of the thread 1 on the pressure roller 5 is represented by the vector 13.1, wherein the vector 13.1 is perpendicular to the connecting line between the axis of rotation 12 of the rocker 10 and the axis of the pressure roller 5. The angle α between the parallels 13.2 to the vector 13.1 and the thread 1 is very small, preferably 0 ° (for illustrative reasons, α is shown here somewhat larger than in the preferred range according to the invention). As a result, the thread is not or only very slightly deflected laterally during a movement of the rocker 10. If the amount of the angle α were significantly greater, for example, as known from the prior art 30 degrees, even slight movements of the rocker 10 would lead to a lateral deflection of the thread 1. In this case, the conditions under which the thread 1 is guided by the traversing yarn guide 4.2 would change.

In FIG. 2 is an alternative, not part of the invention embodiment of a winding machine shown. The description too FIG. 2 is limited only to the elements of the FIG. 1 differ.

In this alternative embodiment, the pressure roller 5 is rotatably mounted on a carriage 15 which is movably mounted on a support 14 in the vertical direction. Again, a sensor 16 detects the deviation of the carriage 15 from its middle positions. The carriage axis 17.1 shows the direction of movement of the carriage 15. The parallel 17.2 to the carriage axis 17.1 passes through in the casserole point of the thread 1 on the pressure rollers 5 and includes the angle α with the tapered thread 1 a. Again, this is the Angle α very small, preferably around 0 °, in order to minimize sideways migration of the thread during movement of the carriage 15.

LIST OF REFERENCE NUMBERS

1

thread

2

casing

3

Traversing housing

4.1

Traversing device

4.2

Traversing thread guide

5

pressure roller

6

Kitchen sink

7.1

winding spindle

7.2

Wechselspulspindel

8th

turntable

9

carrier

10

wing

11

sensor

12

pivot point

13.1

vector

13.2

parallel

14

carrier

15

carriage

16

sensor

17.1

Vector of sled motor axis

17.2

parallel

18

control device

19

contact tangent

α.

angle

Claims (5)

1. Winding machine for winding continuously a plurality of threads (1) to spools (6), with a rotatably mounted rotating plate (8), with at least one spool spindle (7.1), which is supported rotatably in a projecting manner on the rotating plate (8) for receiving the spools (6), with a traversing device (4.1), which is connected in a stationary manner to the housing (2) of the winding machine for traversing the threads (1) to be spooled in the direction of the spool axis, and with a press roll (5) for applying the traversed threads (1) onto the spools (6), wherein the traversing thread (1) forms a thread path plane between the traversing device (4.1) and the arriving line on the press roll (5), wherein in order to compensate the growing of the spool diameter, the axis spacing between the spool spindle and the press roll can be changed by turning the rotating plate (8) and wherein the press roll (5) is mounted rotatably in a receiving means (10, 15), which is mounted movably relative to the axis of the spool spindle, so that the press roll (5) can perform an evasive movement in direction of its vector (13.1, 17.1), from a centre working position, while the diameter of the spool is growing, characterized in that the vector (13.1, 17.1) of the evasive movement of the press roll (5) can, departing from its central working position and the rotational axis of the press roll (5), form an evasive plane, in that the evasive plane and the thread path plane intersect at an angle α and in that the angle α has a value below 10°, wherein the receiving means is a swinging lever (10), and seen in the direction of the thread path, the rotational axis of the swinging lever (10) and the rotational axis of the press roll (5) are disposed approximately at the same height.
2. Winding machine according to claim 1, characterized in that the angle α has a value below 5°.
3. Winding machine according to claim 1, characterized in that the angle α has a value below 2°.
4. Winding machine according to one of claims 1 to 3, characterized in that the press roll and the spool have a contact tangent and that during the winding the contact tangent differs about maximally 20° from the horizontal.
5. Winding machine according to claim 4, characterized in that during the winding the contact tangent differs about maximally 10° from the horizontal.

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