EP0161618A1 - Winding machine - Google Patents

Abstract

A winding machine for continuously running threads is equipped with a bobbin turret with 2 bobbins. To ensure a constant surface speed, 2 contact rollers are provided which rest on the circumference of the spool. The arrangement is such that the winding spindle with the full bobbins leaves the 1st contact roller and comes into engagement with the 2nd contact roller when the thread change is initiated. Both contact rollers (10 and 11) are driven by a single drive motor (17).

Description

The invention relates to a bobbin winder for continuously occurring threads for lossless bobbin change, as e.g. is shown in DE-PS 23 64 284. In such a winding machine, two chucks (referred to as winding spindles in the context of this application) are rotatably mounted and alternately in the winding operation. For this purpose, the winding spindles are mounted on a carrier device that can be moved in translation or rotation. In the known winding machine, a so-called coil turret is used as the carrying device, which is rotatable about an axis and on which the two winding spindles are mounted opposite one another.

DE-PS 23 64 284 describes the problem of "starting" the winding spindle with the empty tubes when changing the bobbin. It is provided that - in the direction of rotation of the bobbin turret - a second contact roller connected to independent drive devices is arranged in front of the first contact roller, which takes over the drive of the winding spindle, so that in the phase of the bobbin change the bobbin spindle with the empty tubes by the second Contact roller started and the winding spindle with the full bobbins continues to be driven by the first contact roller. This solution has the disadvantage that the second contact roller, which in itself serves only as an "aid" for the short period of time when the empty tube is started, must have the high torque required for starting the winding spindle with high acceleration. This causes an unreasonable effort in view of the short-term stress.

Furthermore, in the embodiment according to DE-PS 23 64 284, the second contact roller also serves as a traversing roller. This has turned out to be disadvantageous since the functions of the traversing can only be brought into agreement with the technical effort involved with the function of applying the high starting torque for the empty spindle in a very short period of time.

The object of the invention is to avoid these disadvantages. In particular, an auxiliary drive is to be created which has only a low torque to apply. On the one hand, the solution according to the invention maintains that two contact rollers are provided. However, by means of the contact roller, which is only in operation temporarily, the winding spindle with the full bobbins clamped thereon is driven. No acceleration torque is required for this. Likewise, it does not matter if the speed of the full bobbin drops slightly as a result of slippage or an insufficient torque, since the resulting thread entanglement has no adverse effects during the thread change that takes place in a matter of seconds. On the other hand, the first contact roller intended for continuous operation is also suitable without disadvantages to apply the torque required for starting the winding spindle with the empty tubes and to transmit it by means of frictional engagement with the empty tubes.

An advantageous embodiment of this invention, which is characterized by a very small amount of construction, small space and safe function, is characterized in that the first contact roller is driven by its drive motor via gear and that the second contact roller is located directly on the drive shaft of the drive motor,. wherein the diameter of the first contact roller corresponds to the diameter of the second contact roller multiplied by the gear ratio of the transmission. At this Execution, the motor is preferably arranged parallel to and next to the first contact roller such that its first shaft end, on which the gear, in particular a toothed belt pulley is located, lies in the same normal plane as the gear end of the first contact roller, while the other end of the drive shaft of the motor is approximately ends in the longitudinal center region of the first contact roller and the second contact roller seated on this end extends only over this longitudinal center region.

It is very often required that two coils are produced on one winding spindle. In this case, the second contact roller arranged in the longitudinal center region of the first contact roller or winding spindles is arranged in such a way that it abuts the adjacent end regions of the coil.

Both contact rollers and so-called measuring rollers are referred to as contact rollers in the context of this invention.

The concept of this invention is particularly applicable in winding machines in which the winding spindles or coils are driven by means of the contact rollers. For this purpose, the contact rollers are equipped with drives which can apply the torque required to drive the coils. For this purpose, such friction rollers are in circumferential contact on the spool. When using the contact roller as a friction roller, the advantage of claims 3 to 7 lies in particular in the fact that only a single drive motor is required.

However, the invention can also be applied to winding machines in which each winding spindle is driven by a motor (axle drive motor) acting directly on the coil. In this case, the contact rollers serve to measure the coil peripheral speeds and to control the speed of the final drive motors at such a speed that the coil peripheral speeds are adjusted to a substantially constant value.

For this purpose, the speed of the measuring roller is recorded. The measurement signal is then given to the control system, in particular the frequency converter of an axle drive motor. The final drive motor drives the spindle directly. A synchronous or asynchronous motor is preferably used as the final drive motor. The speed measurement is possible with greater accuracy in the phase of the bobbin change if - as furthermore preferably proposed - the contact rollers are constantly driven by an auxiliary drive motor with a power consumption which essentially corresponds to the idling power of the contact rollers. This drive is operated at a frequency such that the peripheral speed of the contact rollers at the nominal frequency is equal to the target peripheral speed of the coil. The current consumption or power or torque output of the one drive motor for the contact rollers is preferably used as the measurement signal for the surface speed of the measuring roller or coils. The constant drive of both contact rollers with only one drive motor makes it possible to change operation from one to the other winding spindle without switching over the measuring device and without significant changes in the measuring signal. There is therefore no danger that the measured variable leaves the control range and the drive motors of the winding spindles controlled by the measured variable fall out of step.

The winding spindle with the empty tubes is only brought into a rotationally fixed connection with the first contact roller at a later point in time, since this winding spindle is driven with a special starter motor with a fixed predetermined starting frequency, which likewise gives the nominal peripheral speed of the winding spindle. For this, e.g. referred to DE-PS 26 55 544.

Exemplary embodiments of the invention are described below with reference to the drawing.

• Fig. 1A, 1B eine Spulmaschine in einer Phase des Spulenwechsels und in der Betriebsstellung;
• Fig. 2 die Spulmaschine in einer Aufsicht;
• Fig. 3 die schematische Ansicht einer Spulmaschine mit Meßwalzen und Achsantriebsmotoren.

Show it

• 1A, 1B a winding machine in a phase of changing the bobbin and in the operating position;
• 2 shows the winding machine in a top view;
• Fig. 3 is a schematic view of a winding machine with measuring rollers and final drive motors.

In the winding machine, two threads 3 are fed to the winding spindle 2. 1 or 2. 2 in the operating position and the empty tubes stretched thereon via traversing 1. The traversing consists for each thread of a two-, three- or four-armed wing star 7, which is driven in a first plane of rotation I by rotor 12, and an opposing wing star 8 driven by shaft 13 with the same number of arms, which in the Rotary level II rotates. Each thread 3 is fed back through the wings of one wing star 7 and through the arms of the other wing star 8 along a guideline 9. 5 with a fender is designated, which has a longitudinal slot 6, which extends as a thread passage in front of each spool.

The circumference of the winding spindles with the spools stretched thereon is driven by the contact roller 11 in its operating position and by the contact roller 10 in a transition position. The winding spindles are rotatably mounted on a turret 24, which is rotatable about the center 14 with the direction of rotation 15. The traverse 1 with the contact rollers 10 and 11 are mounted in a carriage 16 and can be moved up and down with the carriage. For this purpose, guides 21 are provided, on which bushes 22 slide. One or more pneumatic cylinders 25, which are fed via throttle 27 from pressure source 26 and a valve (not shown), partially absorb the carriage weight during operation and the carriage 16 can be moved up and down. Due to the mobility of the sled 16 the contact roller 11 can avoid the growing spool diameter during operation without the turret 24 being rotated.

Details of the drive result from FIG. 2, which corresponds to the coil change phase according to FIG. 1A. In this phase, the winding spindle 2.1 rests on the contact roller 11 with the two empty tubes spanned thereon. The winding spindle 2.2 with the two spools 4.1 and 4.2 clamped thereon lies against the contact roller 10. The electric drive motor, a synchronous machine 17, is arranged on the carriage 16 axially parallel to the first contact roller 11, in such a way that one end of its drive shaft 18 with the toothed belt pulley 19 and one end of the contact roller 11 with the toothed belt pulley 20 on a common one Normal plane. The drive motor 17 and its drive shaft 18 extend over approximately half the length of the contact roller 11 or the winding spindles. The contact roller 10 is attached to the other end of the drive shaft 18. The contact roller 10 has a larger diameter than the housing of the motor 17 and, depending on the length of the motor 17, at least partially encompasses the housing. The contact roller 10 extends only over a partial length of the winding spindles, in such a way that it only engages the two coils 4.1 and 4.2 in their end regions.

• Die in Fig. 1B dargestellte Drehstellung des Revolvers 24 ist die Betriebsstellung. In dieser Betriebsstellung liegt die Spulspindel 2.1 mit den darauf aufgespannten Leerhülsen in Umfangskontakt an der Kontaktwalze 11 und wird durch diese angetrieben. Hierdurch werden aus den anlaufenden Fäden 3 zwei Spulen 4.1 und 4.2 auf den Hülsen gebildet. Zum Ende der Spulreise, d.h. wenn die Spulen ihren gewünschten Durchmesser erreicht haben, oder - im Falle der Betriebsstörung - auch schon früher, wird der Spulenrevolver 24 mit Drehrichtung 15 verschwenkt und dabei der Schlitten 16 so weit abgesenkt, daß die Kontaktwalze 11 in Kontakt mit der Spulspindel 2.2 und die Kontaktwalze 10 in Kontakt mit den Spulen 4.1, 4.2 gerät, wie dies in den Fig. 1A und 2 dargestellt ist. Hierdurch übernimmt die Kontaktwalze 10 zeitweilig den Antrieb der Spulen, so daß der Faden 3 weiter aufgespult werden kann. Zuvor ist die Spulspindel 2.2 mit den darauf aufgespannten Leerhülsen in Drehung versetzt worden, so daß die Oberflächengeschwindigkeit im wesentlichen derjenigen der Kontaktwalze 11 und der Fadengeschwindigkeit entspricht. Zum Anlassen der Spulspindel 2.2 kann die Kontaktwalze 11 dienen. Bevorzugt ist ein Anlaßmotor z.B. nach DE-PS 26 55 544 vorgesehen. Die Spulspindeln 2.1 und 2.2 können jedoch auch jeweils einen Achsantriebsmotor als Anlaßmotor aufweisen, mit dem sie in direkter Verbindung stehen. Der Anlaßmotor wird bei Einleitung des Spulenwechsels derart in Betrieb gesetzt, daß die Spulspindel 2.2 zumindest einen wesentlichen Teil der erforderlichen Umfangsgeschwindigkeit schon erreicht hat, bevor sie in Kontakt mit der Kontaktwalze 11 gerät. Hierdurch kann die Zeit des Spulenwechsels, insbesondere die Zeit, in der der Revolver 24 verschwenkt wird, schon zum Hochfahren der Drehzahl der Spulspindel 2.2 benutzt werden.

When changing the bobbin, proceed as follows:

• The rotational position of the turret 24 shown in FIG. 1B is the operating position. In this operating position, the winding spindle 2.1 with the empty sleeves clamped thereon is in circumferential contact on the contact roller 11 and is driven by it. As a result, two bobbins 4.1 and 4.2 are formed on the sleeves from the threads 3 approaching. At the end of the winding cycle, ie when the bobbins have reached their desired diameter, or - in the case of operation disturbance - even earlier, the coil turret 24 is pivoted with the direction of rotation 15 and the carriage 16 is lowered so far that the contact roller 11 comes into contact with the winding spindle 2.2 and the contact roller 10 comes into contact with the coils 4.1, 4.2, as in 1A and 2 is shown. As a result, the contact roller 10 temporarily takes over the drive of the bobbins, so that the thread 3 can be wound up further. Previously, the winding spindle 2.2 with the empty tubes stretched thereon was set in rotation, so that the surface speed essentially corresponds to that of the contact roller 11 and the thread speed. The contact roller 11 can be used to start the winding spindle 2.2. A starter motor is preferably provided, for example according to DE-PS 26 55 544. However, the winding spindles 2.1 and 2.2 can also each have an axle drive motor as a starter motor, with which they are in direct connection. When the bobbin change is initiated, the starter motor is put into operation in such a way that the winding spindle 2.2 has already reached at least a substantial part of the required peripheral speed before it comes into contact with the contact roller 11. As a result, the time of the bobbin change, in particular the time in which the turret 24 is pivoted, can already be used to ramp up the speed of the bobbin spindle 2.2.

Now thread changing devices, as e.g. in DE-PS 23 64 284 and 24 61 223 are shown and described, set in motion, and the thread is applied to the sleeves on winding spindle 2.2. Now the turret 24 with the direction of rotation 15 is again pivoted into the position which is opposite to the position shown in FIG. 1B by 180 °. Two coils are now formed on the winding spindle 2.2. During the operating phase according to FIG. 1B, the contact roller 10 runs empty and has no function.

The contact roller 11, which is responsible for the exact thread placement on the bobbin according to the traversing law given by the traversing, has the smallest possible diameter. On the other hand, the contact roller 10 has a diameter that is larger than the housing of the drive motor 17. In order to ensure that the peripheral speeds of the two contact rollers 10 and 11 are essentially the same, the diameter ratio D (contact roller 11) to D (contact roller 10) is equal to the transmission ratio, which is predetermined by the size of the toothed belt pulleys 19 and 20.

For the sake of clarity, the traversing device is not drawn in the schematic view of the winding machine according to FIG. 3. In this respect, reference should be made to FIGS. 1A and 1B. An essential part of the traversing is also the contact roller 11 shown in FIG. 3, which at the same time serves to guide the thread between the traversing and the bobbin and thus to shorten the drag length.

Also not shown in FIG. 3 is the frame of the winding machine and in particular a coil turret on which the winding spindles 2.1 and 2.2 are mounted. In this respect, too, reference is made to FIGS. 1A and 1B.

In Fig. 3 it is shown that the winding spindle 2.1 with the inserted empty tubes 30.1 and 30.2 has moved close to its operating position. The winding spindle 2.2 with the full bobbins 4.1 and 4.2 formed on the other hand is in the last phase of the winding operation, in which the folding of the threads 3.1 and 3.2 from the full bobbins 4.1, 4.2 and the empty tubes 30.1, 30.2 is imminent. In this phase of the winding process, the winding spindle 2.2 is still driven by its final drive motor 28. The final drive motor 28 is a three-phase motor which is fed by the controllable frequency converter 31. The The frequency converter 31 is controlled in such a way that the surface speed of the coils 4.1 and 4.2 remains constant despite the increasing coil diameter. For this purpose, the surface is scanned with the contact roller 10. As shown in FIG. 2, the contact roller 10 extends only over a partial length, specifically over the adjacent end regions of the two coils 4.1 and 4.2. The contact roller 10 lies frictionally on the coil circumferences. The contact roller 10 is driven by the drive motor 17. The drive motor 17 is fed by frequency converter 33. However, the power consumed by the motor 17 is essentially equal to the idle power of the contact roller 10. The idle power is the power of the contact roller 10 that is required to move the contact roller 10 at the required speed, but without contact with the coils 4.1, 4.2 to drive. This idle power also contains the power component that is required for the idle drive of the contact roller 11. It is essential that no torque is transmitted to the coils 4.1, 4.2 and the winding spindle 2.2 by the contact roller 10.

With 33 a measuring device is designated. In this measuring device 33, the current consumed by the drive motor 17 of the contact roller 10 or the power absorbed is measured. Suitable devices for measuring current or power are e.g. through DE-PS 25 35 457 (Bag. 956) and 26 06 093 (Bag. 970) (= US-PS 4,069,985) known. Switch 34 connects measuring device 33 to frequency converter 31 in a closed control loop.

In this phase of the winding process, the winding spindle 2.1 with the empty tubes 30.1 and 30.2 by means of the switch 38, frequency converter 32 and final drive motor 29 with the maximum speed predetermined by the frequency converter 32 driven. This maximum speed is adjusted so that the peripheral speed of the empty tubes 30.1 and 30.2 essentially correspond to the peripheral speed of the coils 4.1 and 4.2 and the contact rollers 10 and 11. It is advantageous if the peripheral speed of the empty tubes is slightly higher, since this makes it easier to remove the threads from the full bobbins 4.1 and to apply the threads to the empty tubes 30.1 and 30.2. This change of the threads takes place in the drawn position of the winding spindles 2.1 and 2.2. When the threads are applied to the empty tubes 30.1 and 30.2 and are torn from the full bobbins 4.1 and 4.2, new bobbins are formed on the empty tubes 30.1 and 30.2. Now the (not shown) turret is rotated further, so that the circumference of the empty sleeves 30.1 and 30.2 or the bobbin formed thereon come into circumferential contact with the contact roller 11. At the same time, the full coils 4.1 and 4.2 lose peripheral contact with the contact roller 10. The drive motor 28 is switched off from the control circuit by actuating the switch 34 and switched off by actuating the switch 37. Now the winding spindle 2.2 is braked by a brake, not shown. It is also possible to electrically brake the winding spindle 2.2 using a suitable final drive motor 28. As soon as the peripheral contact between the empty tubes 30.1 and 30.2 or the bobbins formed thereon and the contact roller 11 is established, the switch 35 and thus the control circuit is closed, by means of which the peripheral speed of the coils to be newly formed is kept constant. When the bobbins formed on the winding spindle 2.1 have approximately reached their final diameter, the bobbin turret (not shown) is rotated so far that the winding spindle 2.1 assumes the position in which the winding spindle 2.2 is shown in FIG. 3. In this position are those shown on the winding spindle 2.1 So in turn coils on the contact roller 10 while they have lost contact with the contact roller 11. The threading described above now takes place.

Suitable devices for changing the threads between the full bobbins and the empty tubes are e.g. in U.S. Patent 3,913,852.

Due to the arrangement of the contact rollers 10 and 11 shown, the drives 28, 29 of the bobbin spindle can be adjusted to the required bobbin peripheral speed continuously and also in the phase of changing the thread.

REFERENCE SIGN LISTING

• 1 traversing
• 2.1 winding spindle
• 2.2 winding spindle
• 3 threads
• 4.1 Coils
• 4.2 Coils
• 5 mudguard
• 6 longitudinal slot
• 7 wing star, wing, driving arm
• 8 wing star, wing, driving arm
• 9 guidelines
• 10 contact roller
• 11 contact roller
• 12 rotor
• 13 wave
• 14 center point
• 15 direction of rotation
• 16 sledges
• 17 drive motor
• 18 drive shaft
• 19 toothed belt pulley
• 20 toothed belt pulley
• 21 leadership
• 22 socket
• 24 revolvers
• 25 cylinders
• 26 pressure source
• 27 Orossel
• 28 final drive motor, three-phase motor
• 29 final drive motor, three-phase motor
• 30.1 empty tube
• 30.2 Empty pod
• 31 frequency converter
• 32 frequency converters
• 33 measuring device
• 34 switches
• 35 switches
• 36 frequency converters
• 37 switches
• 38 switches

Claims (11)

1. winding machine for continuously starting threads, consisting of
a traversing device,
two rotatably mounted winding spindles, which are to be brought alternately into an operating position in the case of frictional contact with a first contact roller and when changing the bobbin in frictional contact with a second contact roller and in the rest position,
characterized in that
the second contact roller lies in the movement path of the winding spindle with the coils wound thereon between the operating position and the bobbin changing position. 2. winding machine according to claim 1,
characterized in that
both contact rollers are constantly driven at a peripheral speed which corresponds essentially to the peripheral speed of the bobbins at a predetermined thread speed. 3. winding machine according to claim 2,
characterized in that
both contact rollers are driven by a single motor with the same surface speed. 4. winding machine according to claim 3,
characterized in that
the first contact roller is driven by an axially parallel motor via a gear, eg a toothed belt, that the second contact roller sits on the drive shaft of the motor, and that the gear ratio I = speed of the motor / speed of the first contact roller is equal to the diameter ratio D2 / D1 of the second to the first contact roller. 5. winding machine according to one of claims 1 to 3,
characterized in that
the motor is axially parallel to the first contact roller in such a way that one end of its drive shaft lies in the same normal plane as one end of the first contact roller,
and that the toothed belt drive is in this normal plane, and that at the other end of the drive shaft is the second contact roller, the diameter of which is larger than the housing diameter of the motor. 6. winding machine according to claim 4,
characterized in that
the second contact roller is arranged approximately in the longitudinal center region of the first contact roller. 7. winding machine according to one of claims 1 to 6,
characterized in that
two coils are formed on each winding spindle, and that the second contact roller extends over the adjacent end regions of the two coils. 8. Winding machine according to one of the preceding claims, characterized in that
the winding spindles are freely rotatable,
and that a starter motor is provided which is brought into drive connection with the winding spindle with empty tubes before the empty tubes come into circumferential contact with the first contact roller. 9. winding machine according to one of claims 2 to 7,
characterized in that
each of the winding spindles is driven by a three-phase motor with frequency converter,
and that the frequency converter, which feeds the three-phase motor of the winding spindle with the full coils, can be controlled as a function of the current or power consumption of the second contact roller. 10. Winding machine according to one of the preceding claims, characterized in that
the winding spindles are rotatably mounted on a rotatable or swiveling turret. 11. Winding machine according to one of the preceding claims, characterized by
wing winging.

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