WO2019101717A1

WO2019101717A1 - Method for monitoring a winding device, and winding device

Info

Publication number: WO2019101717A1
Application number: PCT/EP2018/081868
Authority: WO
Inventors: Arnulf Sauer; Stefan Faulstich
Original assignee: Oerlikon Textile Gmbh & Co. Kg
Priority date: 2017-11-25
Filing date: 2018-11-20
Publication date: 2019-05-31
Also published as: JP7216091B2; JP2021504591A; CN111406032A; DE112018005658A5; CN111406032B

Abstract

The invention relates to a method for monitoring a winding device for threads in a melt spinning process, and to a winding device. The winding device has a godet unit (1), a plurality of deflecting rollers (4.1-4.5), a plurality of winding stations (3.1-3.5), a control device (8) and a monitoring unit (9) for monitoring an operating parameter with at least one sensor means (10). Here, more than one group of created threads is guided through a godet unit (1) and separated to the winding stations (3.1-3.5) by means of the deflecting rollers (4.1-4.5). The threads are wound in the winding stations (3.1-3.5) to form packages, wherein at least one operating parameter is monitored. In order to be able to monitor the entire process from taking off the thread group to winding the individual threads, according to the invention, a motor torque of the godet motor (1.2, 1.2') of the godet unit (1) and/or at least one motor torque of a roller motor (5.1-5.5) of one of the driven deflecting rollers (4.1-4.5) is monitored as operating parameter. In this respect, the sensor means (10) is assigned to a controller (1.3, 1.3') of a godet motor (1.2, 1.2') of the godet unit (1) and/or to at least one control unit (6.1-6.5) of a roller motor (5.1-5.5) of one of the deflecting rollers (4.1-4.5) in order to sense the motor torque.

Description

Method for monitoring a winding device and

takeup

The invention relates to a method for monitoring a winding device for threads in a melt spinning process according to the preamble of claim 1 and a winding device for threads in a melt spinning process according to the preamble of claim 6.

Synthetic filaments are produced in a melt spinning process in which the filaments are formed from a polymer melt of bundles of bundled filaments which, after cooling, are drawn off and wound into bobbins. Here, the physical properties of the threads are determined essentially by the stripping and stretching with subsequent winding. In that regard, it is known that in the melt spinning process, a so-called take-up system is of great importance. As take-up system while the godet means and the winding means are referred to, which are arranged below a spinning device for removing the threads. Such take-up systems are today often used as a machine unit, which are named here as Aufwickeleinrichtungen.

Such a winding device is known for example from DE 10 2007 049 459 Al. The known take-up device thus comprises an industry-driven godet unit, a plurality of guide rollers, the plurality of winding points are arranged, and a control device. The godet unit carries all threads in common, which are usually removed from the spinning device as a group of threads. After leaving the godet unit, a separation of the threads takes place to each individual thread to a coil in one of the winding stations wrap. To monitor the windings, an operating parameter is monitored for at least one of the deflection rollers. Thus, a speed of the order directing roller or a bearing force of the guide roller can control the leadership of one of the threads visibly uniformity.

In the known method and the known winding device, however, the leadership of the yarn sheet remains completely uncontrolled. However, just pull the pulling and stretching of the threads in the godet units decisively influenced the physical properties, so that a uniform trigger and a trouble-free separation of the group of threads on the winding stations for the late re thread quality are of great importance.

It is therefore the object of the invention to improve the generic method for monitoring a take-up device and the generic take-up device in such a way that both the guidance of the group of threads and the separate guidance of the threads can be monitored.

Another object of the invention is to carry out the monitoring on the basis of a Be operating parameters, which is significantly influenced by the leadership of the yarn sheet as well as by the leadership of individual threads.

This object is achieved for the method for monitoring a winding device in that a motor torque of a Galet tenmotors the godet unit and / or at least one motor torque of a roller motor of the driven pulleys is monitored as operating parameters.

The solution for the take-up device is that the sensor means on the control unit of a godet motor of the godet unit and / or at least a control unit of a roller motor is associated with one of the deflection rollers for detecting a motor torque.

Advantageous developments of the invention are defined by the features and feature combinations of the respective subclaims.

The invention makes use of the knowledge that certain motor torques of a drive of a roller are required for guiding a thread or for guiding a yarn bundle, in order to produce the desired thread tensions during removal or during winding. In that regard, a motor torque of a Galet tenmotors the godet unit or a motor torque of a roller motor of the deflection roller is particularly suitable to control a uniformity of a thread guide. With the monitoring of the engine torque, therefore, both the removal of the yarn sheet, the guidance and stretching of the yarn sheet or the winding and separating the threads can be controlled. The erfindungsge Permitted method is thus particularly advantageous to produce threads in a melt spinning process with high uniformity.

At this point, however, it is expressly pointed out that the detection of the engine torque can basically be done by a direct measurement or by an indirect measurement of a motor current and a motor voltage.

Since the motor torques of the godet drives occurring in a melt spinning process are dependent on many parameters such as the number of filaments, filaments, draw rate, friction and last but not least wind losses, the development of the method according to the invention is particularly advantageous in which at least one process value of the Motor torque is detected, the process value is stored and detected at a later time Status value of the motor torque is compared with the process value. Thus, at the beginning of a melt spinning process, the process values of the engine torque occurring after the parameters have been set can be recorded. This process value is then used for monitoring in order to evaluate the subsequent status values. A specification of a previously empirically determined setpoint can thus be omitted.

In order to ensure the data transfer via conventional BUS systems, which essentially transmit the control signals, according to an advantageous development of the method according to the invention, the state value of the engine torque is recorded continuously at time intervals and compared with the process value. In this way, process monitoring can be realized with a relatively small amount of data. In principle, however, there is also the possibility of continuously determining the state values of the engine torque continuously.

Since, on removal of the group of yarns from a spinning device, the individual threads have different deflections and thus a different guide history due to a larger spinning pitch in relation to a treatment distance of the threads on the godet units Roller motors in the winkel sites the process variant preferably carried out, in which the process value of the engine torque per roller motor is detected and that a reference value is determined as an average of the process values of the engine torque. Thus, it is already possible to detect differences in the thread guide during the winding of the threads from the comparison of the process values with the reference value. To monitor the uniformity of the process, the state value of the motor torque per roller motor is then recorded and compared with the reference value. Thus, each of the winding positions can be monitored as to whether the yarns are wound into coils with the desired uniformity of a winding tension.

The winding device according to the invention is characterized in that both a pulling or stretching of the yarn sheet as well as a Einzelfüh tion of the threads are monitored. In addition, the operating parameters monitored during the guidance of the yarn sheet can be compared with the operating parameters occurring in the individual guidance of the yarns in relation to one another, so that possible deviations are also recognized early on. For this purpose, in the winding device according to the invention, the sensor means a control device of a godet motor of the godet unit and / or at least one control unit of a roller motor of the driven pulleys for detecting a

Motor torque assigned. Here, the sensor means may be adapted to detect a direct value of the engine torque or alternatively to measure a motor current and a motor voltage which are converted to the motor torque. In the motor torque of the godet motor or the roller motor, all parameters essential for the thread guidance are entered. Thus, the thread tension on one or more threads has a direct influence on the motor torque of the respective drive. Similarly, the number of threads and the thread titer affects the motor torque of the godet motor. In addition, the engine torque also contains the information about the condition of the respective godet unit and the respective deflection roller. Thus, the friction or even wind losses of the engine torque at high speeds of the godet motor or even the roller motor influences. In order to realize in addition to the monitoring of the yarn sheet a complete monitoring of a single yarns in the winding stations, a plurality of control units are provided for a plurality of roller motors, wherein the sensor means are connected to the moni monitoring unit.

According to an advantageous embodiment of the invention Aufwickelein device, the sensor means is gebil det by a current meter of a motor current, which is converted into the motor torque of the operating parameter. For this purpose, the monitoring unit has an evaluation electronics, so that at the beginning of a process, a process value of the engine torque and currency end of the process, the continuously determined state values of Motorordohmomen tes are detected. For further evaluation, the monitoring unit is designed with a memory and a comparator and integrated within the control device. Thus, the continuously determined state values of the torque can be continuously compared with stored process values of the engine torque.

Depending on the design of the godet motor and the roller motor, the control unit or the control unit are arranged separately. Particularly advantageous, however, is the embodiment in which the control unit as a Steuerelekt ronik in the godet motor and / or the control unit is integrated as a control electronics in the roller motor. For this purpose, the godet motor and / or the roller motor could be embodied for example by a brushless synchronous motor.

The inventive method for monitoring a winding device and the winding device according to the invention are flexible and suitable for the production of all known synthetic threads. Thus, depending on gigkeit of the formation of the godet unit by using multiple godets a fully drawn thread or a few godets a teilverstreckter thread can be produced. The winding device according to the invention with the inte grate th godet unit can be combined as a complete take-up system with all known spinning devices. Thus, in the spinning device he testified yarn sheet deducted directly by the godet unit of the Aufwickeleinrich device.

To further explain the method according to the invention, some embodiments of the winding device according to the invention are explained in more detail below with reference to the accompanying figures.

They show:

Fig. 1 shows a schematic side view of the embodiment of the inventive winding device

Fig. 2 schematically shows a front view of the embodiment of Fig. 1 Fig. 3 schematically shows a plan view of the individual guidance of the threads angetriebe NEN pulleys in the winding stations of the winding device Fig. 4 shows schematically the structure of a monitoring unit of the device Steuereinrich the take-up

Fig. 5 shows schematically a plan view of another embodiment of the driven pulleys in the winding positions of the Aufwickeleinrich device

In Figs. 1 and 2, an embodiment of the Aufwi ckeleinrichtung invention is shown in several views. In Fig. 1 is a side view and in Fig. 2 is a front view of the embodiment shown. The exemplary embodiment of the winding device according to the invention is shown in FIGS and 2 each shown in an operating situation in which a group of yarns 7 of several threads 7.1 are wound simultaneously to form coils 15. The yarn sheet 7 is extruded and cooled directly in one of the winder upstream Spinneinrich device. The spinning device and the winding device not shown here are used together to produce synthetic threads in a melt spinning process.

The following description of the embodiment of Fig. 1 and Fig. 2 refers to both figures, as far as no explicit reference is made to one of the figures.

The take-up device has in this embodiment, a Galettenein unit 1, which is held on a godet carrier 1.4. The godet carrier 1.4 is supported on a machine frame 2, which contains a total of 5 winding points 3.1 to 3.5.

The godet unit 1 is formed in this embodiment by two arranged to an S-shaped yarn path godets 1.1 and 1.G and the associated godet motors 1.2 and l.2 '. Each of the godet motors 1.2 and 1.2 'is assigned a control unit 1.3 and 1.3'.

The winding points 3.1 to 3.5 formed in the machine frame 2 extend along a projecting winding spindle 11.1. The number of winding positions is exemplary. Thus, 10, 12 or even more winding points can be formed parallel to one another in the machine frame 2.

The winding spindle 11.1 is held on a rotatably mounted turntable 12 which, offset by 180 °, carries a second winding spindle 11.2. The winding spindles 11.1 and 11.2 are each assigned two spindle drives 13.1 and 13.2. The revolving tion of the turntable 12 is controlled by a plate drive 14. As a result of the rotational movement of the turntable 12, the winding spindles 11.1 and 11.2 can be pivoted alternately into a change region and into an operating region. At the circumference of the winding spindles 11.1 and 11.2 a plurality of winding tubes 16 are arranged, so that per winding point 3.1 to 3.5, a coil 15 can be wound on one of the winding tubes 16.

In the operating situation shown in Fig. 1 and Fig. 2, a total of five coils 15 are wound on the Spulspin del 11.1 simultaneously.

For winding the threads 7.1 to coil 15, a traversing device 17 is provided, which has for each winding point 3.1 to 3.5 a yarn reciprocating means leading back and forth. As traversing means here oscillating thread leader or more translationally moving thread guide can be used. The traversing device 17 is driven by a traverse drive 17.1.

The filing of the threads on the circumference of the coil 15 is supported by a rotatable to pressing roller 18, which extends over all winding steles 3.1 to 3.5 and rests on the circumference of the coil 15 with contact.

In order to separate the withdrawn from the godet unit 1 yarn sheet 7 and supply the winding points 3.1 and 3.5, in a lead-in area of the winding Stel len 3.1 and 3.5 are each a pulley 4.1 to 4.5 arranged. The Umlenkrol len 4.1 to 4.5 are rotatably mounted and each driven by a roller motor 5.1 to 5.5. The pulleys 4.1 to 4.5 are held on a roller carrier 20, which is supported on the machine frame 2. Each of the roller motors 5.1 to 5.5 each have a control unit 6.1 to 6.5 assigned. For further explanation, in addition to Figs. 1 and 2 in addition to Fig. 3 reference is made. In Fig. 3 is a plan view of the godet unit 1 and the pulleys 4.1 to 4.5 is shown. The deflection rollers 4.1 to 4.5 are rotatably mounted on the roller carrier 20 and are connected to the oppositely arranged roller motors 5.1 to 5.5. The control units 6.1 to 6.5 associated with the roller motors 5.1 to 5.5 each have a sensor means 10, which in this case is formed by one current meter 10.1 to 10.5 each. The control units 6.1 to 6.5 and the ammeters 10.1 to 10.6 are connected for example via a bus system with a control device 8. The control device 8 contains a monitoring unit 9, in particular with the ammeters

10.1 to 10.5 is connected.

The control devices 1.3 of the two godet motors 1.2 and 1.2 'also each have an ammeter 10.6 and 10.7, which are coupled via the control devices 1.3 and 1.3' to the control device 8 and the monitoring unit 9.

As is apparent from the illustration in Fig. 1, the control device 8 is coupled to a drive control unit 19, which is associated with the spindle drives 13.1 and 13.2, the plate drive 14 and the traverse drive 17.1.

In the exemplary embodiment illustrated in FIGS. 1 and 2, at the beginning of the process in a melt spinning process, the yarn sheet 7 is first applied by means of a suction injector to the godets 1.1 and 11 'of the godet unit 1 and to the deflection rollers 4.1 to 4.5 of the winding stations 3.1 to 3.5 to wind the threads 7.1 of the yarn sheet 7 on one of the winding spindles 11.1 or 11.2. Once the winding is done, for example, in the control unit 1.3 of the godet

1.1 measured a motor current through the flowmeter 10.7 and transferred within the monitoring unit 9 to a motor torque. The determined at this time value of the torque of the godet motor 1.2 is called Process value and saved for later process monitoring. As the process progresses, the signals from the ammeter 10.7 in the monitoring unit are transferred continuously or at intervals of time to a respective state value of the motor torque. The state values of the engine torque recorded at a later time are then compared with the process value of the torque determined at the beginning. Thus, the deduction of the yarn sheet 7 can monitor continuously from a spinning device. With unexplainable deviations, process interventions are possible. To monitor the winding stations and in particular the separation of the thread sharp on the monofilaments 7.1 additionally or alternatively, the signals of the ammeters 10.1 to 10.5 in the control units 6.1 to 6.5 of the monitoring units 9 are supplied. In the monitoring unit 9 can be to each of the Rol lenmotoren 5.1 to 5.5 each determine a value of the instantaneous engine torque. In this case, the values of the

Motor torque stored as process values and stored in the system. The values of the engine torques determined later are recorded as state values and compared with the stored process values. This means that each individual winding point 3.1 to 3.5 can be continuously monitored in terms of its uniform thread guiding and winding.

In addition, it is also possible to extend the drawing of the yarn sheet 7 by a complete monitoring of the godet unit 1. Thus, the measuring signal of the ammeter 10.6 in the control unit l.3 'of the monitoring unit 9 is transmitted and from this to a value of the engine torque of the

Godet l.2 'transferred. Thus, the engine torques of the two Ga lettenmotoren 1.2 and 1 2 'can be used in their relation to monitor the stretching of the yarn sheet 7. Furthermore, at the pulleys 4.1 to 4.5 upstream engine torque of the godet 1.1 are compared as a sum signal in relation to the individual signals of the roller motors 5.1 to 5.5. In principle, it is also possible to control the pulleys 4.1 to 4.5 at different peripheral speeds in order to obtain identical relations in the engine torques of the roller motors 5.1 to 5.5 to the motor torque of the godet motor 1. 2 'of the godet 1.1. This can be compensated preferably unevenness in the leadership or in the thread tension in the separation of the yarn sheet 7 advantageous.

In principle, however, it is also possible to add up the process values of the engine torques determined at the beginning at the same circumferential speeds of the deflection pulleys 4.1 to 4.5 and to convert them to a reference value by averaging. This reference value could thus be used for monitoring and assessing the condition values of the engine torques of the roller motors 5.1 to 5.5.

To carry out the monitoring, a structure of the monitoring unit 9 is shown schematically in FIG. 4 by way of example. Thus, the monitoring unit 9 has an evaluation electronics 9.1 in order to evaluate the measurement signals I _t supplied by the sensor means 10 or the ammeters 10.1 to 10.7. The evaluation electronics 9.1 is associated with an electronic memory 9.2 and a comparator 9.3. The memory 9.2 serves to store the process values of the engine torques Mp. In the comparator 9.3, the process values of the engine torques Mp stored in the memory 9.2 are compared with the respective state values of the engine torques Mz. In this case, the determined difference of the engine torques AM is used in order to achieve as uniform a process as possible. tion and thus to obtain a high uniformity in the thread quality when removing and winding the threads.

It should be mentioned at this point, however, that the monitoring unit 9 could also be given directly predetermined setpoint values of the engine torques of the godet motors 1.2 and the roller motors 5.1 to 5.5 via an interface (not shown here). In that regard, the state values of the engine torques can be equal to the predefined setpoint values. In the aforementioned embodiment, the godet motors 1.2 and 1.2 'and the roller motors 5.1 to 5.5 are performed by synchronous or Asynchronma machines, in which the control units are 1.3 and the control unit 6.1 to 6.5 arranged separately. In principle, however, it is also possible to use such motors in which the control electronics are integrated within the motors. Thus, the roller motor 5.1 to 5.5 and the Galettenmo gates 1.2 and l.2 'can optionally be performed by brushless synchronous motors, in which the control electronics 6.1 to 6.5 in the roller motors 5.1 to 5.5 and the controllers 1.3 and l.3' in the Galtten engines 1.2 and l.2 'are integrated. Such an embodiment is shown schematically in FIG.

The embodiment of the winding device according to the invention shown in FIGS. 1 and 2 is exemplary in its construction. In particular, the Galet teneinheiten 1 is suitable in the illustrated embodiment to produce so-called POY game. However, the method according to the invention and the winding device according to the invention are not limited thereto. On the other hand, it is also possible to use godet units, in which the yarn is given a full draw in order to produce so-called FDY-Game. In addition, additional treatment facilities may also be integrated to produce, for example, crimped threads or technical threads. In that regard, the winding device according to the invention and the erfmdungsgemäße method can be used flexibly to be used in each of the known melt spinning processes for the production of synthetic threads.

Claims

claims

A method of monitoring a thread winding apparatus in a melt spinning process in which a plurality of yarns as one

The yarn sheet is guided by at least one driven godet unit, in which the threads are distributed after a separation of the yarn sheet by a plurality of deflection rollers on several winding points and wound into coils and in which at least one operating parameter is monitored.

characterized in that

a motor torque of a godet motor of the godet unit and / or at least a motor torque of a roller motor of one of the driven deflection rollers is monitored as operating parameter.

2. The method according to claim 1,

characterized in that

at least one process value of the engine torque is detected, that the process value is stored, and that a state value of the engine torque detected at a later time is compared with the process value.

3. V experienced according to claim 2,

characterized in that

the state value of the engine torque is continuously recorded in time intervals and compared with the process value.

Method according to claim 2 or 3,

characterized in that

the process value of the engine torque per roller motor is detected and that a reference value is determined as an average of the process values of the engine torque.

Method according to claim 4,

characterized in that

the state value of the engine torque per roller motor is detected and compared with the reference value.

Winding device for synthetic threads in a melt spinning process with at least one godet unit (1), with a plurality of deflection rollers (4.1 - 4.5), with a plurality of winding points (3.1 - 3.5), with a control device (8) and with a monitoring unit (9), the Monitoring an operating parameter is connected to at least one sensor means (10),

characterized in that

the sensor means (10) a control device (1.3, 1.3 ') of a godet motor (1.2, l.2') of the godet unit (1) and / or at least one control unit (6.1 - 6.5) of a roller motor (5.1 - 5.5) one of the driven Pulleys (4.1 - 4.5) is assigned to detect a motor torque.

Winding device according to claim 6,

characterized in that

a plurality of control units (6.1-6.5) are provided for a plurality of roller motors (5.1-5.5) and that a plurality of sensor means (10.1-10.5) distributed to the control units (6.1-6.5) are provided with the control unit. tion unit (9) are connected.

8. take-up device according to claim 6 or 7,

characterized in that

the sensor means (10) by an ammeter (10.1 - 10.7) of a

Motor current is formed, which is converted into the motor torque as an operating parameter.

9. Winding device according to one of claims 6 to 8,

characterized in that

the monitoring unit (9) with an evaluation electronics (9.1), a memory (9.2) and a comparator (9.3) is integrated within the control device (8).

10. Winding device according to one of claims 6 to 9,

characterized in that

the control unit (1.3, 1.3 ') as an electronic control unit in the Galet tenmotor (1.2, l.2') and / or the control unit (6.1 - 6.5) as an electronic control unit in the roller motor (5.1 - 5.5) is integrated.