EP1794076A1

EP1794076A1 - Winding device

Info

Publication number: EP1794076A1
Application number: EP05774943A
Authority: EP
Inventors: Hermann Westrich
Original assignee: Saurer GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2004-07-28
Filing date: 2005-07-20
Publication date: 2007-06-13
Also published as: JP2008508157A; KR20070048209A; CN101018724A; WO2006013005A1; JP4469893B2

Abstract

The invention relates to a winding device for winding continuously supplied threads (1, 1') onto reels (8.2, 8.2'). Said winding device comprises two symmetrically arranged rotary plates (9, 9') respectively comprising at least one winding spindle (7, 7'), onto which respectively part of the threads is wound. A pressure roll (6, 6') is associated with each rotary plate, said pressure roll being used to press the threads onto the reels. The pressure rolls are mounted on a common holder (12) by means of mobile carriers (14, 14'), said holder being vertically displaceable by means of a drive (19) in order to compensate the growing reel diameter. According to the invention, in order to homogeneously wind the thread onto both winding spindles, a sensor means (5, 5') for detecting the increase in diameter of at least one of the reels is coupled to a control device (17). Said control device evaluates the sensor signals, forms a combined value, and emits a regulating value to the drive of the common holder.

Description

spooling

The invention relates to a winding device according to the preamble of An ₇ claim 1 and a method for operating the winding device.

Such winding devices are used to rewind continuously tapering threads, preferably chemical threads, and are known, for example, from WO 03/068648 A1. For this purpose, one or more bobbin tubes are clamped on two simultaneously operated, rotatably mounted winding spindles, which represent two winding stations. The yarn feed takes place for both winding units in a common plane arranged between the winding units. As a result of the rotation of the winding spindles, the tapered threads on the spool sleeves form spools. By means of a common traversing device, the threads are periodically moved back and forth in the direction of the coil axis, so that the coils receive a cylindric shape. Pressure rollers mounted above the winding spindles contact the bobbins and transfer the yarn from the traversing device to the bobbins. In addition, a contact pressure of the pressure rollers ensures a fixed coil structure. With regard to the drive of the spool and the pressure roller several variants are known in the art, namely drive of the spool by the pressure roller by means of friction or drive of the spool by the winding spindle at drive-less or low torque driven pressure roller. In the case of the winding device described in WO 03/068648 A1, the two winding spindles are each mounted on two turntables arranged in mirror image juxtaposition. At the beginning of the winding cycle, the turntables are initially stationary. As the diameter of the bobbin increases, the turntables are then rotated in opposite directions so as to increase the distance between the winding spindle and the pressure roller. In addition, the pressure rollers are mounted in rockers, which in turn are mounted in a vertically freely movable common carriage. The wings are also able to compensate within certain limits an increase in diameter of both coils. The sledge allows one additional degree of freedom of evasive movement to increase the Abstan¬ between the winding spindle and pressure roller. By coordinating these two evasive movements, a uniform contact angle between the spool and the pressure roller is achieved over a large spool area.

When reaching the final diameter of the coils, replacement of the full bobbins by empty bobbins is required. In WO 03/068648 A1, this takes place by two winding spindles arranged on each turntable, which are exchanged alternately between a rest position and a winding position.

However, the teaching shown by WO 03/068648 A1 has the disadvantage that the two rockers which carry the pressure rollers can indeed compensate for differences in diameter between the two coils within certain limits. However, this balancing takes place uncoordinated. In addition, it is not possible to react to large diameter differences. This can have negative consequences on the quality of the coil structure.

It is therefore an object of the invention to further develop the Aufspulvorrichtung known from the prior art with two winding units to the effect that the coils are wound safely and reliably even with large differences in diameter and also with optimal pressure forces.

This object is achieved according to the invention by a winding device according to claim 1 An¬.

For this purpose, the holder is connected to a drive, which moves it away in a guide be¬ movable with increasing bobbin diameter of the winding spindles. A sensor means senses the increase in diameter of at least one coil or both coils. A control device is provided which evaluates the measured values of the sensor means to a control value and controls the drive of the holder accordingly. This has the advantage that the holder always remains in spite of increasing coil diameter has the required distance from the coils. In addition, the pressure rollers can be kept in an optimal position for winding up the threads Positi ^¬ on.

In a variant of the winding device according to the invention, the sensor means is formed by sensors which sense the position of the pressure roller or of the carrier relative to the holder. This variant makes use of the fact that with increasing coil diameter, first the pressure roller is raised in the movable carrier relative to the holder. For this purpose, the pressure rollers mounted in the carriers or the carriers themselves are in operative connection with sensors. The position of the pressure roller or of the carrier can be determined, for example, with a rotary encoder, proximity sensor or distance sensor. The coils are loaded with the weight of the Andrück¬ rollers. To regulate the contact pressure can also be changed advantageously by, for example, an attacking on the carrier pneumatic cylinders.

In another variant of the winding device according to the invention, the contact pressure between the pressure roller and the coil is detected by the sensor means. However, this presupposes that the contact pressure increases with increasing coil diameter. This can be achieved, for example, by designing the kinematics of the carriers or by using a spring. The person skilled in the corresponding solutions are known. As a rule, the measurement of the contact pressure will be direct or indirect, for example with strain gauges. However, other possibilities of indirect force measurement are conceivable, such as the sound measurement at the bearings of the pressure rollers.

In a further development of the winding device according to the invention, yarn bobbin sensors are provided which detect the yarn breakage of one of the tapered yarns. These thread breakage sensors are connected to the control device. Thus, the controller has knowledge of a disturbance in the formation of one of the two coils and can take this into account. The connection between Fa¬ denbruchsensoren and control can either be done directly or indirectly via a higher-level control device, which is usually provided for the control of the drives of the winding device.

Since both the movement of the carrier and the rotation of the turntable have an influence on the distance between the winding spindle and pressure roller, in a preferred embodiment there is an operative connection between the control device and a control device which controls the rotary drives of the turntable.

The inventive method for operating the Auf¬ spulvorrichtung invention provides that in the control device from the determined value of the diameter increase of one of the coils, a control value is determined, which is output to the drive of the carriage and causes movement of the carriage. The advantage of this method is that only one sensor is required and that the processing of the measurement signal in the control device is simple. However, it assumes that the diameter increase of both coils is approximately identical, as possible, for example, when winding the threads of a spinning position.

The alternative method according to the invention for operating the winding device according to the invention provides that the diameter increase of both coils is determined by the sensor means. In the control device, a link value is first determined from the measured values of the respective sensors. Depending on this link value, a manipulated variable is output to the drive of the carriage, which causes the carriage to move. This alternative method has the advantage that even different increases in diameter can be taken into account. In one embodiment variant of the method according to the invention, this linking value is formed by an average value of the two measured values. This has the advantage that the two carrier fibers are always located in a location close to the mean value even at different Spulendurchmes ^¬.

In another embodiment variant of the method, the maximum value of the two measured values 2x1 of the determination of the connected value is used. In this case, the respective larger coil than the Spul¬ relevant for the process is used. The smaller coil follows the larger coil with a different position of the holder.

A preferred further embodiment variant of the method weights measured values of the sensors. This combines the advantages of the two aforementioned methods. Thus, for example, for smaller differences in diameter, the larger measured value, which corresponds to the larger coil, can be weighed very heavily. With increasing deviation of the diameter differences, the holder of the smaller coil would be too far away from the middle layer. Therefore, such extremely deviating measured values are considered more strongly. In one example, this concept of the invention is explained. The example uses a high weighting for the measured value of the holder, which is to be assigned to the larger coil, and takes the deviation from the central position linearly into account. By contrast, the measured value of the other holder is taken into account with a lower weighting. However, in order to be able to react with the other holder to large deviations from the central position, this measured value is taken into account exponentially.

In a further development of the method, the signals of thread breakage sensors which detect the thread breakage of the tapered threads are processed in the control device and taken into account in the formation of the linkage value. So it makes sense, when interrupting the winding process of one of the two Faden¬ scarves only to take into account the measured value of the other yarn sheet is to be assigned. As a result, the winding operation of the other group of threads can be continued without disturbance.

From the logic value of the measured variables, a manipulated variable is determined and output to the drive of the holder. In a variant of the method, the manipulated variable is formed continuously from the logic value and output to the drive. This results in a particularly uniform sequence of the process.

In another variant of the method, a manipulated variable is only output if the logic value has reached a limit value. For example, the holder may initially stand still. As soon as the carriers with the pressure rollers have reached an upper limit due to the growing coils, the controller intervenes and moves away from the axes of the winding spindles into the carrier. This is done until the carrier with the pressure rollers have reached a lower limit, in which the drive is switched off again.

In the preferred method, the rotors on which the winding spindles are mounted, are not further rotated during the winding cycle. In this case, the increase in the number of spools is compensated for solely by the method of the holder. However, this should not exclude that the rotors are rotated during the winding cycle in a few stages, for example, to avoid a collision of the coils. However, this rotation is not primarily intended for the compensation of the growing Spulen¬ diameter.

In a variant of the method, the rotors are further rotated in many small steps or continuously, wherein the rotational speed can be either constant or, in a root function, follows the diameter increase of the coils. In contrast to the method variant described above, the method of the holder has a compensating function, while the rotation of the rotary plate compensates for the increasing coil diameter. In a particularly preferred form of the process of forming the actuator is ^¬ value from the logical value coordinated with the actuation of the Drehtel ^¬ ler. So it makes sense, for example, to prevent the procedure of the holder when anyway at the same time the turntable is rotated further, since both actions affect the distance between the winding spindle and pressure roller and, so ge interfere with each other.

An embodiment will be described in more detail below with reference to the accompanying drawings.

It shows:

Fig. 1 shows schematically an embodiment of the inventive dishwasher.

FIG. 1 schematically shows an exemplary embodiment of the winding machine according to the invention.

The winding machine is constructed of two mirror-image arranged turntable 9 and 9 ', each with two winding spindle 7, 7' and 10, 10 ', which are synchronously operable in operation.

An example of a spinning unit, not shown here continuously tapering yarn bundle is first with the yarn guides 2 and T, which are arranged by means of the yarn guide holder 3 above the winding machine, divided into two sub-yarn sheets 1 and 1 '. In this case, each sub-thread group may comprise one or more threads which are arranged one behind the other. The individual threads are alternated in the further course of traversing thread guides 5 and 5 ', which are periodically moved back and forth by and the traversing 4. Subsequently, the threads are placed on the rotating pressure rollers 6 and 6 ' and conveyed by the nip rollers 6 and 6 'to which the rotating speed of the same Umfangsge ^¬ coils 8.2 and 8.2, ^1, to be of this aufgewi ^¬ oped.

The coils 8.2 and 8.2 'are wound on bobbin tubes 8.1 and 8.1', which are mounted on the winding spindles 7 and T. In accordance with the number of single filaments wound on each of the halves, a plurality of bobbin sleeves 8.1 and 8.1 'are arranged one behind the other on each of the winding spindles 7 and 7'. With regard to their driving of the coils, it is possible and intended to drive the winding spindles 7 and T directly by motor. Alternatively, it is possible and preferred to drive the pressure rollers 6 and 10 in such a way that the coils 8.2 and 8.2 'are driven via friction by peripheral contact with the pressure rollers 6 and 6'.

With increasing diameter of the coils 8.2 and 8.2 'must be in the distance between the axes of the winding spindles 7 and 7' of the axes of the pressure rollers 6 and 6 'increase accordingly. For this purpose, the pressure rollers 6 and 6 'supported in movable carriers 14, 14' are arranged on a common holder 12 together with the traversing device 4 and the guides 2 and 2 '. This holder 12 is connected via vertically arranged guides 13 with a housing 11 verbun¬. These guides 13 allow the holder 12 to be driven upwards by a drive with increasing coil diameter. In the example shown in FIG. 1, the drive is formed by a holder drive 19, for example an electric motor, which linearly drives the holder 12 via a threaded spindle 20. Other drive variants are possible.

In this case, the weight of the carrier 14 and 14 'and the associated parts as well as the weight of the pressure rollers 6 and 6' on the coils 8.2 and 8.2 '. In order to reduce the associated contact force, a relief, not shown here, is provided on the carriers 14 and 14 '. This relief can bei¬ example by spring force or by an applied with compressed air Pneu- matic cylinder done. The relief is supported relative to the holder 12. At this point, the carrier 14 and 14 'should again be discussed. Depending on the desired characteristic of the coil structure and the kinematics of the carriers 14 and 14 ', the winding device according to the invention can have different relationships between the way in which the carrier 14 or 14' is raised relative to the holder 12 and between the pressure roller 6 or 6 '. and coil 8.2 or 8.2 'acting Anpress¬ force. The required relationship also depends not least on the type of sensor means or of the sensor 15 or 15 ', which is used for the recording of the measured value 16 or 16'.

In this embodiment, two sensors 15 and 15 'are used as the sensor means, which detect the path that the carrier 14 or 14' is lifted relative to the holder 12. This takes place either on the holder 12 directly or on the pressure rollers 6 or 6 '. As a sensor, any type of Wegaufhehmer can be used here.

Alternatively, it is also possible for the contact force acting between the pressure roller 6 or 6 'and the coil 8.2 or 8.2' to be detected by the two sensors 15 and 15 ', for example via strain gauges or via a body sound measurement.

Another alternative embodiment of the sensor means could be that the rotational speed of a winding spindle or the rotational speeds of both winding spindle are detected. Since the threads wound at a constant winding speed wer¬, it is necessary with increasing diameter of the coils and thus changing peripheral speed of the coils to control the drives of the winding spindles such that despite increasing coils, the peripheral speeds of the coils remain constant. Thus, the corresponding diameter of the coil can be determined directly from the speed of the winding spindle. As sensors speed sensors could be used, which would be assigned to the winding spindles. The The control device zxigefuhrten measured values could be converted directly or indirectly into a control value.

The measured values 16 and 16 'recorded by the sensors 15 and 15' are fed to the control direction 17. The control device 17 forms from the two measured values 16 and 16 'a logic value which is converted into a control value 18. This control value 18 is then output to the holder drive 19, which moves the holder 12 by means of a threaded spindle 20. In the Steuereinrich¬ device 17 thus a controller is realized. These regulators can be used as a continuous regulator which reacts continuously to changes in the measured values 16 and 16 'with a change in the manipulated value 18, or as a two-point controller which only exceeds or falls below one of the measured values 16 and 16' or one From this derived connection value reacts with a change of the control value 18, be ausge¬ leads.

The threads of the tapering yarn sheets 1 and 1 'are monitored by yarn break sensors 21 and 21'. An occurring thread breakage is signaled to the control device 17.

The control device 17 is connected to a control unit 20, which is connected to rotary drives (not shown here) of the turntable 9 and 9 'and a rotational movement of the turntable 9 and 9' controls. For this purpose, the turntables 9 and 9 'are rotatably mounted in the housing 11. This allows coordination between the turntable rotation and the method of the holder 12.

In the following, 2 burst scenarios are described.

First, assume that both the diameter and the rate of increase in diameter of the coils 8.2 and 8.2 'are identical. The holder 12 is in the position shown in Figure 1. The holders 14 and 14 'are located in the illustrated central position. The tapering yarn bundles 1 and 1 ' are wound as described above on the coils 8.2 and 8.2 ', wherein the diameter of the coils 8.2 and 8.2' increases steadily. Due to the kinematics of the holders 14 and 14 ', the pressure rollers 6 and 6' fastened to the holders 14 and 14 'are perpendicular to the plane defined by the contact line and the contact tangent between coil 8.2 or 8.2' and pressure roller 6 or 6 'is tensioned, freely movable. With increasing coil diameter, the holders 14 and 14 'soft upwards. This is sensed by the sensors 15 and 15 'and passed to the control device 17. The control device 17 forms an average of the two measured values 16 and 16 ', for example, and increases the control value 18, which is output to the holder drive 19. The holder 12 now moves upward until the carriers 14 and 14 'have again taken their middle position. It is possible for a person skilled in the art to design the controller formed by the control device 17 such that on the one hand the holder 12 is moved in time, on the other hand instabilities or overshooting is avoided. In particular, it makes little sense for the holder to be driven downwards again after swinging over. Ideally, the holder 12 is moved ge exactly with the diameter increase rate of the coils 8.2 and 8.2 'upwards.

The second Aufspulszenario is characterized by a different diameter of the coils 8.2 and 8.2 '. It is now important that the method according to which the connection value between the two measured values 16 and 16 'is formed, on the one hand prevents one of the carriers 14 or 14' from being extended until its stop. If it is assumed that the quality of the bobbins decreases in extreme positions of the carriers 14 or 14 ', it can also be sensible to position one of the two carriers 14 or 14', for example the larger bobbin, in one position as far as possible in the vicinity of the central position of the carrier 14 or 14 'to operate, while in the other carrier deliberately an extreme position of the carrier is accepted. Another Aufspulszenario that can occur is that in one of the two Fa¬ denscharen 1 or 1 'a thread break occurs. This is detected by a yarn break sensor 18 or 18 'whose signal is fed into the control device 17. The control device 17 then fades out the measured value associated with the broken group of yarns during the determination of the linking value between the measured values 16 and 16 ', so that the coil associated with the intact yarn bundle can continue to be wound up.

The exemplary embodiment of the winding device according to the invention shown in FIG. 1 could have only one of the sensors 15 or 15 'as a sensor means in order to detect the increase in diameter of the coil 8.2 or 8.2'. The construction and the function of such an exemplary embodiment would be identical to the aforementioned exemplary embodiment, with the exception that in the control device 17 a control value for controlling the holder drive 19 would be generated from a measured value. In order not to obtain any impermissible positions of the non-sensed pressure roller in this case at different winding growth rates on the bobbins 8.2 and 8.2 ', the non-sensed pressure roller could in each case be assigned two contact switches having a maximum allowable stroke of the pressure roller or support limit and allow intervention in the control of the holder drive.

LIST OF REFERENCE NUMBERS

1.1 '. yarn sheet

2.2 '. thread guides

3. Thread tube holder

4. oscillation

5.5 '. Traversing thread guide

6.6 '. pressure roller

7,7 '. spindles

8.1,8.1 'Coil sleeve

8.2, 8.2 'coil

9.9 '. turntable

10, 10 'winding spindles in rest position

11. Housing

12. Holder

13 leadership

14, 14 '. carrier

15.15 'sensor

16, 16 'reading

17. Control device

18th control value

19. Holder drive

20. Threaded spindle

21.21 'Yarn breakage sensor

22 control unit

Claims

claims

1. winding device for winding continuously tapered threads (1, V) on coils (8.2, 8.2 '), with two rotatable Spulspindem (7, T) on which the aufzuspulenden coils (8.2, 8.2') are held, with two rotatable turntables (9, 9 ') on which the winding spindles are held, wherein each winding spindle (7, T) is associated with a pressure roller (6, 6'), the winding spindles (7, T) and pressure rollers (6, 6 ') are arranged so that the winding on both winding spindles (7, T) can take place simultaneously, wherein the pressure rollers (6, 6') by means of movable support (14, 14 ') are arranged on a common holder (12) and in that the supports (14, 14 ') allow a relative movement of the pressure rollers relative to the holder (12), wherein the holder (12) is designed to be movable by means of a guide (13) in the form that an evasive movement of the holder (12) with the pressure rollers (6, 6 ') as a result of an increasing diameter of the

Coils (8.2, 8.2 ') is possible, characterized in that the holder (12) is connected to a drive (19, 20) which moves the holder (12) in the guide (13), that a sensor means (12) 5, 5 ') is provided, which detects a diameter increase of at least one of the wound coils (8.2, 8.2'), and that a control device (17) connected to the sensor means (5, 5 ') is provided, which in Dependence on the measured diameter increase of the coil (8.2, 8.2 ') the drive (19) with a control value (18) controls.

2. Winding device according to claim 1, characterized in that the sensor means by one or two sensors (15, 15 ') is formed, the pressing position of one or both carriers (14, 14') or one or both An¬ (6 , 6 ') against the holder (12) detect.

3. Winding device according to claim 1, characterized in that the sensor means by one or two sensors (15, 15 ') is formed, the contact pressure between the pressure rollers (6, 6') and the coils (8.2, 8.2 ') or a record the measured variable dependent on the contact force.

4. Winding device according to one of claims 1 to 3, characterized gekenn¬ characterized in that yarn breakage sensors (21, 21 ') for detecting a Faden¬ break the threads (1, 1') are provided, and that the yarn breakage sensors directly or indirectly with the Control device (17) are connected.

5. Winding device according to one of claims 1 to 4, characterized gekenn¬ characterized in that the control device (17) ver¬ with a control device (22) is connected, which controls the rotary drives of the turntable (9, 9 ').

6. A method for operating a winding device according to one of Ansprü¬ che 1 to 5, characterized in that the steps

- Measuring the diameter growth of one of the coils (8.2, 8.2 '), forming a control value (18) from the measured value (16) and

- Outputting the control value (18) to the holder drive (19) are performed.

7. A method for operating a winding device according to one of Ansprü¬ che 1 to 5, characterized in that the steps

Measuring the diameter growth of both coils (8.2, 8.2 '), forming a connection value from the measured values (16, 16'),

- Forming a control value (18) from the link value

- Output of the control value to the holder drive (19) are performed.

8. The method according to claim 7, characterized in that the association value is formed from the mean value of the two measured values (16) and (16 ').

9. The method according to claim 1, characterized in that the linkage value is formed from the maximum value of the two measured values (16) and (16 ').

10. The method according to claim 7, characterized in that depending on the difference of the measured values (16, 16 ') of their mean value, the measured values

(16, 16 ') are subjected to a weighting in each case when the associated value is formed.

11. The method according to any one of claims 7 to 10, characterized in that the control device (17) at one by thread breakage sensors (21,

21 ') signalized thread break the measured value (16, 16') of the Fadenschar affected by the Faden¬ break yarn bundle (1, 1 ') fades in the formation of the linkage value.

12. The method according to any one of claims 7 to 11, characterized in that the control value (18) is output continuously.

13. The method according to any one of claims 7 to 11, characterized in that the control value (18) is output as soon as the logic value has exceeded an upper limit and that the output of the Stellwer¬ tes (18) is set as soon as the logic value has exceeded a lower limit.

14. The method according to any one of claims 7 to 13, characterized in that the turntables (9, 9 ') are not rotated during the whole Aufwickeins or at least during the predominant Aufwickelzeit.

15. The method according to any one of claims 7 to 13, characterized in that the turntables (9, 9 ') during the winding permanently or zu¬ at least during the predominant Aufwickelzeit be rotated continuously or in steps with increasing coil diameter.

16. The method according to any one of claims 7 to 15, characterized in that the formation of a control value (18) from the connection value is coordinated kordi¬ with the formation of control signals from a control unit (22) to the drives of the turntable (9, 9 ') are output.