JP2018076182A - Method and winding device for operating a winding station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of setting, in particular, the yarn tension for operating a reeling station.SOLUTION: The yarn tension is set by yarn tension means (14), and unreeling acceleration means (45) descends over a cup (9) as the unreeling progresses. The yarn tension of a standard reeling station (2') is feedback-controlled by a yarn tension sensor (20), for which, the yarn tension means (14) is set according to the measured values of the yarn tension sensor (20). The setting of the yarn tension means (14) in the standard reeling station (2') is captured and stored depending on the position of the unreeling acceleration means (45), and at the reeling station, the setting of the yarn tension means (14) is performed at the values stored depending on the position of the unreeling acceleration means (45). This invention also relates to a reeling device (1).SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for operating a winding station, in particular for setting the yarn tension. The invention further relates to a winding device.

  In a known winding device, for example as described in EP 2 468 670 B1, the yarn tension or the yarn tension, ie the yarn tension relative to the yarn cross-sectional area, is controlled or feedback controlled. The yarn tension is set by the yarn tension means. When controlling the yarn tension, no sensor is required, and for example, a constant adjustment signal can be set in advance in the yarn tension means. The feedback control of the yarn tension requires a sensor that measures a value indicating the yarn tension. A so-called yarn tension sensor is common. The operator determines whether the yarn tension is feedback-controlled or controlled. It is reasonable to set such a setting for each lot. In that case, one lot is comprised from the several workstation which winds up the same thread | yarn which has the same characteristic to cheese. However, in principle, the operator can set the control even if a yarn tension sensor is present. In such a case, the yarn tension sensor is turned off, or at least its measured value is not used by the control unit.

In a further possible way, at the winding station with the yarn tension sensor, the yarn tension is feedback controlled and the set pattern of the yarn tensioning means is captured and recorded. This pattern can later be used without measuring the yarn tension for feeding out other cups in the same lot. The setting of the yarn tensioning means can be captured and stored depending on, for example, the length of the yarn delivered from the cup. The length of the fed yarn is a value indicating the amount of remaining yarn on the spinning cup. The pattern can be used when the yarn tension sensor is defective, as described in EP 2 468 670 B1, or it is possible to operate a winding station that is not comprehensively equipped with a yarn tension sensor. To. In the latter case, a reference winding station with a yarn tension sensor is required.
When pulling out from the spinning cup, the yarn tension increases unless appropriate measures are taken. Nevertheless, in order to keep the yarn tension constant, the yarn tension must be regressively controlled by the yarn tensioning means as described above. The tension means pressure is reduced in response to an increase in yarn tension due to unwinding. In addition to the yarn tensioning means, the yarn tension can be influenced by the winding speed. For this reason, for example, from DE 37 33 597 A1, it is known to control the winding speed in accordance with the amount of yarn remaining on the spinning cup. Such winding speed control can be implemented as an alternative to, or incidental to, feedback control of yarn tension. In the feedback control of the yarn tension, the winding speed can be changed only when the predetermined yarn tension cannot be maintained by the yarn tension means alone. As the amount of yarn remaining on the spinning cup decreases, the yarn tension will increase unless appropriate measures are taken. Thus, at the start of the cup campaign, the yarn tensioning means applies a strong pressure and gradually reduces the pressure as the cup campaign progresses. If the yarn tensioning means reaches a certain point, it may become impossible to reduce the pressure any more. That is, the yarn tension increases. In order to avoid this, the winding speed is reduced. Preferably, the speed is reduced in steps. In the first step, the speed is reduced by a pre-determined percentage and the yarn tension is lowered, so that the yarn tensioning means has to increase its pressure again in order to keep the yarn tension in one hand. Therefore, the thread tension can be feedback controlled again by the thread tension sensor and the thread tension means. When the pressure of the yarn pulling means has fallen again to the minimum value, in the second step, the winding speed is further reduced.

  Yarn tension has a great influence on the quality of the cheese being rolled. Therefore, when the quality requirement is high, the winding station includes a yarn tension sensor, and the yarn tension is feedback-controlled. When the quality requirement is low, the yarn tension sensor is not used from the viewpoint of cost, and a constant setting is made for the yarn tension means. The pattern described above is a compromise for setting the yarn tensioning means. With this measure, a full cup can be wound on high-quality cheese without a yarn tension sensor. However, the remaining or defective cups cannot be unwound properly.

  EP 2 671 983 A2 discloses a winding station of a winding device with so-called unwinding acceleration means. The unwinding acceleration means is a pipe-shaped part, and is lowered on the cup in the axial direction as the unwinding of the cup progresses. This can affect the yarn balloon. When the yarn tension decreases, the winding speed can be increased. The unwinding acceleration means has sensor means for capturing the cup cone, or in other words, the sensor means captures the end of the cup bobbin on the side to be withdrawn. Thereby, the unwinding acceleration means can be lowered as required. The unwinding acceleration means can be lowered by, for example, a stepping motor. From the number of steps of the stepping motor, the position of the unwinding acceleration means and the position of the cup cone associated therewith can be determined. In EP 2 671 983 A2, the unwinding acceleration means can also be used to determine the position of the irregularity in the cup when irregularities occur. By determining the position, for example, in the same lot of cups, the winding speed can be reduced at this position.

  The object of the present invention is therefore to adjust the yarn tension as needed in a simple manner at the winding station of the winding device.

  This problem is solved by a method for operating the winding station described below. The yarn is wound from a cup onto a take-up reel, in particular cheese. The yarn tension is set by the yarn tensioning means. The unwinding acceleration means is lowered on the cup as the unwinding progresses. The yarn tension is feedback-controlled by the yarn tension sensor at the reference winding station, and the yarn tension means is set according to the measured value of the yarn tension sensor. The setting of the yarn pulling means is captured and stored according to the position of the unwinding acceleration means at the reference winding station. In the winding station, the setting of the yarn pulling means is carried out with a value stored according to the position of the unwinding acceleration means.

  The problem is further solved by a winding device comprising a plurality of similar winding stations having the following characteristics: The winding station is configured such that the cup yarn is wound on a take-up reel, particularly preferably on cheese. The winding station has yarn tensioning means for setting the yarn tension, and unwinding acceleration means that is lowered as the unwinding progresses. One winding station is configured as a reference winding station and has a yarn tension sensor. Here, there is provided control means for performing feedback control of the yarn tension of the reference winding station using a yarn tension sensor and setting the yarn tension means according to the measured value of the yarn tension sensor. The control means further captures and stores the setting of the yarn tensioning means in the reference winding station in accordance with the position of the unwinding acceleration means, and further sets the setting of the yarn tensioning means in a certain winding station as the value unwinding. It is also configured to carry out based on a value stored according to the position of the acceleration means.

  In this case, any winding station of the winding device can be configured as the reference winding station. The correlation determined at the reference winding station can also be used at other winding stations.

  The method according to the present invention and the winding device according to the present invention provide a predetermined yarn tension at the beginning of a cup campaign, even though most winding stations of the winding device operate without a yarn tension sensor. Makes it possible to continue to maintain from end to end. Moreover, the remaining cups and defective cups can be unwound at a predetermined yarn tension with high reliability. The cup cone is recognized by the unwinding acceleration means, and the yarn tensioning means is set according to the cup cone position of the unwound cup. The change in the position of the cup cone as a result of the unwinding progress is recognized by the downward movement of the unwinding acceleration means, and the setting of the thread tension means is preserved between the position of the cup cone and the setting of the thread tension means. Implemented based on correlation.

  Besides operating the take-up station without the yarn tension sensor, the present invention also makes it possible to surpass the failure of the yarn tension sensor. In short, while the yarn tension sensor is not activated, the setting of the yarn tensioning means can be performed based on the stored correlation between the position of the cup cone and the setting of the yarn tensioning means.

  At the reference winding station, as described above, if the winding speed is adjusted in accordance with the measurement value of the yarn tension sensor and / or the setting of the yarn tensioning means, it is significant in addition to the setting of the yarn tensioning means. In addition, the winding speed can be stored according to the position of the unwinding acceleration means. Thus, when winding without using the yarn tension sensor, the winding speed can be adjusted in addition to the setting of the yarn tensioning means.

  Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

1 is a winding device according to the present invention comprising a number of winding stations. It is a reference | standard winding station of the winding apparatus which concerns on this invention.

  FIG. 1 shows a winding device 1 with a number of winding stations 2 and a reference winding station 2 ′ arranged between the end stations 55, 56 of the winding device 1. The winding device has a central control unit 50 that is connected to each winding station controller 40 via a bus system 60. The central control unit has a keyboard 52 and a display 51 for operation and display.

  In FIG. 2, the reference winding station 2 'during the winding process is schematically shown as a side view. Each winding station 2 has the same structure. The reference winding station 2 ′ only has an additional yarn tension sensor 20. At the take-up station 2, a known and therefore not described in detail feed reel, usually a spinning cup 9 with a small amount of yarn, produced on a ring spinning machine, is rewound into a cheese 11 with a larger volume. It is done. The completed cheese 11 is then handed over to the cheese transport means 21 having the entire length by a service unit 57 that is automatically operated, for example a cheese changer, and a reel delivery station arranged at the end of the device. Sent to a similar device.

  Such a winding device 1 is further equipped with a rotary magazine in which the spinning cup 9 can be stocked, or a cheese automatic manufacturing machine has a distribution means as a reel and sleeve transport system 3. Yes. The spinning cup 9 or the empty sleeve 34 is set in the vertical direction on the conveying plate 8 and is fed through the reel and sleeve conveying system 3. Of the sleeve transport system 3, only the head carry-in section 4, the temporary storage section 5 that can be driven in the reverse direction, the lateral transport section 6 connected to the winding station 2, and the sleeve return section 7 are shown. As suggested, the supplied spinning cup 9 is first set at the unwinding position 10 in the region of the transverse conveying section 6 of the winding station 2 and then rewinded.

  Each winding station 2 is only known and suggested to achieve the above purpose, but not only the spinning cup 9 is rewound into the larger volume of cheese 11, but also the yarn 30 Various yarn monitoring and yarn processing means are also provided for monitoring yarn errors during the rewinding process and ensuring that discovered yarn errors are cleared. Each take-up station 2 has a take-up station controller 40, which is connected to the yarn monitoring and yarn handling means via the control wiring only suggested, The central control unit 50 and the control means 58 of the service unit 57 are also connected via the system 60.

  For example, each of the winding stations 2 is provided with a winding means 24, which is movably supported around the rotation shaft 19, and takes up a winding drive means 26 and a yarn changer (traverse swing) means 28. A winding frame 18 equipped with

In the example shown here, the surface of the cheese 11 is on the drive shaft 26 during the winding process and is interlocked by frictional forces. In this case, the drive shaft 26 is driven via a reversible (not shown) drive device capable of controlling the rotation speed.
The traverse of the yarn 30 when it is sent to the cheese 11 is performed by the yarn changer means 28 having the finger type yarn guide 29 in this embodiment.

  The winding station 2 further includes a yarn treatment means, preferably a pneumatic piecing means 13 having a cutting means 43, a lower thread sensor 22, a yarn tensioning means 14, and a yarn purifying means 15 having a yarn cutting means 17. In addition, a paraffin coating means 16 is also provided. The reference winding station 2 ′ shown in FIG. 2 additionally has a yarn tension sensor 20.

  Further, the winding station 2 is also provided with a suction nozzle 12 and a suction pipe 25, and a constant negative pressure can be applied to them. At this time, the suction nozzle 12 and the suction pipe 25 are connected to a negative pressure duct 32 having the entire length of the apparatus, and are themselves connected to a negative pressure source 33.

In the embodiment shown, further, the yarn catch nozzle 23, which is arranged slightly behind the yarn path in the region of the paraffin application means 16, is arranged so that the yarn 30 is at its junction 42 during the winding process. Positioned to pass. The yarn catch nozzle 23 is also connected to the negative pressure duct 32 via the air branching means 27. The air branching means 27 has a relatively large capacity with the connecting portion 35 for the yarn catch nozzle 23, and its confluence is sealed by the suction nozzle 12 placed at the standby position P during normal winding operation. It also has a discharge support 36. That is, when the suction nozzle 12 is rotated upward, the discharge support 36 is released, so that the negative pressure applied to the yarn catch nozzle 23 is interrupted.
Above the unwinding position 10 of the cup 9, unwinding acceleration means 45 is arranged. Measuring means 46 is provided at the head-side end of the unwinding acceleration means 45. The measuring means 46 detects the cup cone 47 of the cup 9 at the unwinding position 10. In this way, the unwinding acceleration means 45 can be lowered on the cup 9 as the unwinding progresses. The unwinding acceleration means 45 is maintained at a constant distance from the cup cone 47 by the measuring means 46. The axial movement of the unwinding acceleration means 45 can be performed by a stepping motor (not shown), for example. By capturing the step of the stepping motor, the position of the unwinding acceleration means 45 can be easily determined.

  To maintain a constant yarn tension. At the start of the cup campaign, first, a higher tensioner pressure is required. However, as the remaining amount of yarn on the spinning cup 9 decreases, that is, the position of the unwinding acceleration means 45 moves downward. The higher the tensioner pressure, the lower the tension must be set to maintain a constant yarn tension. If the tensioner pressure is constant, the yarn tension increases with the progress of unwinding.

  The winding speed need not be constant from beginning to end of the cup campaign. If the yarn tensioning means 14 can no longer reduce the pressure, the winding speed can be lowered stepwise so that the yarn tensioning means 14 can act on the yarn 30 again.

  In the embodiment shown, the winding device 1 has one reference winding station 2 '. It may be meaningful to provide a plurality of reference winding stations 2 'in one winding device. This is particularly significant when the winding device 1 handles different lots in parallel. The reference winding station 2 'is closed-loop controlled by yarn tension. In short, the yarn tension is measured by the yarn tension sensor 20, and the yarn tensioning means 14 is set so that the yarn tension matches the set value. The setting of the yarn pulling means 14 is captured and stored according to the position of the unwinding acceleration means 45. In addition, the corresponding winding speed can also be saved. These values can be stored in the memory of the workstation controller 40 or in the memory of the central control unit 50 so that it is safe from a power failure. Note that the storage can be performed, for example, in a table format. According to this table, the setting value of the yarn tensioning unit 14 and the winding speed are associated with each position of the unwinding acceleration unit 45.

  The data thus determined is transferred to the workstation computer 40 of the winding station 2 that is not equipped with the yarn tension sensor 20. The yarn tensioning means 14 and, if necessary, the setting of the winding speed are carried out in relation to the position of the unwinding acceleration means 45 according to a stored table. In order to improve the operation of the winding station that is not equipped with the yarn tension sensor 20, an average value of a plurality of cups of one lot obtained at the reference winding station is determined for setting the yarn tension means from the table. It is also possible. This average value is used at each winding station 2.

Claims (2)

The thread (30) of the cup (9) is wound on a take-up reel, in particular cheese (11),
The yarn tension is set by the yarn tensioning means (14), and
The unwinding acceleration means (45) is lowered on the cup (9) as the unwinding progresses.
A method for operating a winding station (2),
The yarn tension at the reference winding station (2 ') is controlled by the yarn tension sensor (20), in which case the yarn tensioning means (14) is set in relation to the measured value of the yarn tension sensor (20). ,
The setting of the yarn tensioning means (14) at the reference winding station (2 ') is detected and stored in relation to the position of the unwinding acceleration means (45); and
In the winding station (2), the setting of the yarn tensioning means (14) is carried out according to a value stored in relation to the position of the unwinding acceleration means (45). A way to drive. A winding station (2) is configured to wind the yarn from the cup (9) onto a winding reel, in particular cheese (11),
The winding station (2) has yarn tensioning means (14) for setting the yarn tension;
The winding station (2) has unwinding acceleration means (45) that can be lowered as the unwinding progresses;
A winding device (1) equipped with a number of similar winding stations (2),
One winding station is configured as a reference winding station (2 ′) equipped with a yarn tension sensor (20),
The yarn tension at the reference winding station (2 ') is controlled using the yarn tension sensor (20), and the yarn tension means can be set according to the measured value of the yarn tension sensor (20). Control means (40, 50) are provided,
The control means (40, 50) further detects and stores the setting of the yarn tensioning means (14) related to the position of the unwinding acceleration means (45) at the reference winding station (2 '), and other The winding station (2) is configured to perform the setting of the yarn tensioning means (14) using a value stored in relation to the position of the unwinding acceleration means (45). Winding device.