JP2021527175A - Methods and equipment for setting yarn groups - Google Patents

Abstract

The present invention is at least one take-up device (2) comprising a plurality of godets (11.1, 11.2) and a plurality of take-up points (3.1-3.4) postfixed to the godets. ) Is provided, and a method and an apparatus for setting a yarn group in a melt spinning process are described. In this case, the thread group (21) is sucked into the tube piece (14) of the suction device (1) by a suction flow and continuously led out. The thread group (21) is superposed and guided by the movement of the tube piece (14), and the suction flow in the tube piece is controlled by the operating pressure of the compressed air supplied to the suction device (1). In order to obtain a reliable yarn guide at each stage of the gimmick process, the operating pressure of the compressed air is changed to change the suction flow depending on the drawing speed of the yarn group. For this purpose, the pull-out speed of the yarn group or the pull-out speed of one of the plurality of yarns in the yarn group is measured during the setting process.

Description

The present invention relates to a method for setting a yarn group in a melt spinning process equipped with at least one take-up device in the form described in the premise part of claim 1 and the form described in the premise part of claim 9. The present invention relates to an apparatus for setting a yarn group in a melt spinning process, which comprises at least one take-up apparatus.

The method of the form described at the beginning and the device of the form described at the beginning for setting the yarn group in the melt spinning process, which comprises at least one take-up device, are known, for example, from European Patent Application Publication No. 3312121. There is.

During the production or processing of yarn in a melt spinning apparatus, it is usual that the yarn group is first accommodated by a suction apparatus at the start of the process and continuously guided to a waste container. Since the suction device is preferably formed as a suction gun that is manually or automatically guided, the superimposed motion of the suction device allows the thread group to be guided. As a result, the yarn group is set in the godet and the winding point of the winding device according to the process procedure. To this end, the operator or robot needs to consider the thread guides specified in the process in order to obtain an unobtrusive process start. In particular, it is necessary to continuously pull out and suck the yarn group at each point in the gimmick process.

In known methods and devices for setting yarn groups, the suction device is operated by a robot. For this purpose, it is necessary to accommodate the thread group by the suction device and set it on the godet and the winding point of the winding device according to the predetermined movement course of the robot. Depending on the movement progress of the robot, the suction flow of the suction device is adapted to each device situation, so that a reliable thread guide is realized, and various different device situations occur. Therefore, the suction force of the suction device is increased or decreased via the control unit of the robot.

Known methods and devices have the major drawback that the robot's motion course must be maintained at the time of thread swarming so that the suction device can use the adjusted suction flow each time. .. When the operator operates the suction device, there arises a problem that individual gimmick steps require different lengths of time depending on the operator. To that extent, thread slack or individual thread breakage can occur due to erroneously adjusted suction flow.

Therefore, the subject of the present invention is to improve the method of the form described at the beginning and the device of the form described at the beginning for setting the yarn group in the melt spinning process equipped with at least one take-up device, and to set the yarn group. In each of these situations, ensure that the suction device is pulled out and guided into the waste container independently of the manual or automated guide.

Another object of the present invention is to configure the method described at the beginning and the device described at the beginning for setting the yarn group so as to be reliably repeatable and reproducible during manual operation.

According to the present invention, this problem is solved by a method having the characteristics according to claim 1 and an apparatus having the characteristics according to claim 9.

The advantageous variant is defined by the features and combinations of features described in each dependent claim.

The present invention is based on the knowledge that yarn groups have different withdrawal velocities during the rigging process, and the different withdrawal velocities in particular require different suction outputs of the suction device. For example, the yarn group is withdrawn from the spinning machine at a relatively low withdrawal rate. However, a higher pull-out speed is desired in the yarn group when gimming the rotating godette, which can prevent sudden hyperextension during gimming. According to the present invention, the operating pressure of the compressed air is the drawing speed of the yarn group and / or of the plurality of yarns of the yarn group so that the desired withdrawal speed can be obtained for the yarn guide in each gimmick situation. It is changed to change the suction flow depending on the pulling speed of one thread. The operating pressure of the compressed air can directly control the suction flow in the suction device for accommodating and deriving the yarn group. This creates the possibility of guiding the yarn group at the corresponding pull-out speed in each gimmick situation.

For this purpose, the apparatus according to the present invention includes a measuring device for detecting the withdrawal speed of the yarn group or a measuring device for detecting the withdrawal speed of one of a plurality of yarns of the yarn group. The measuring device is connected to the control unit, which is connected to the control valve, and the control valve changes the operating pressure of the compressed air to change the suction flow depending on the extraction speed. .. The current state of the yarn guide at the time of tacking is known by detecting the withdrawal speed of the yarn group, or alternatively by detecting the withdrawal speed of one of the plurality of yarns in the yarn group. To that extent, the intentional change when the device status is changed can be carried out by the operator or automatically.

The pull-out speed of the yarn group or the pull-out speed of one of the yarns of the yarn group is measured by direct contact with the yarn group or yarn, or alternative, non-contact. Depending on the type of thread and the type of process, a thread-friendly measuring device can be used.

The measurement of the pull-out speed of the yarn group by contact is preferably a measurement of the pull-out speed of the yarn group or the pull-out speed of the yarn, and the rotation speed of the freely rotatable yarn guide roller in which the yarn group or the yarn is partially wound. It is carried out according to the method variation obtained by. This raises the possibility of using a yarn guide roller already provided in the take-up device or an additionally installed yarn guide roller to measure the pull-out speed in the yarn group.

In particular, since it is a problem to set the yarn group on the godette that pulls out the yarn group from the spinning device, the drawing speed of the yarn group is set to the rotation speed of one of the godets in which the yarn group or the yarn is partially wound. The method variation determined by the measurement of is also particularly advantageous. In this case, each godet provided in the godet system is suitable for specifying the withdrawal speed.

In a driven roller or godet, the withdrawal speed or the number of rotations of the roller or godet may be determined by monitoring and measuring the torque of the godet or roller drive.

Non-contact detection of the pull-out speed of the yarn group is preferably carried out by a capacitive sensor device. To that extent, variations in the method for detecting the withdrawal speed by the capacitive sensor device are particularly thread friendly.

The withdrawal speed of the yarn group is shortly spaced from the suction opening of the tube piece of the suction device, i.e. Method variations measured in the vicinity are favorably implemented. Therefore, in some cases, the thread guide element that causes the deviation of the withdrawal speed is not arranged between the measurement point of the withdrawal speed and the suction device.

When the target withdrawal speed of the yarn group is preset to adjust the operating pressure so that each gimmick step can be carried out with the correct adjustment of the operating pressure, and the measured actual withdrawal speed is the same as the target withdrawal speed. In addition, a method form in which the operating pressure is achieved is used. This allows for extremely precise adjustment of the operating pressure in the suction device in order to obtain the suction action required to form the required withdrawal speed.

Preferably, a plurality of target withdrawal velocities of the yarn group for the plurality of gimmick steps are preset.

In the device according to the present invention, the measuring device for detecting the withdrawal speed is arranged directly on the suction device or, instead, on the winding device. The arrangement in the area of the suction opening of the drawer, i.e. in the vicinity, forms a particularly advantageous embodiment in which extremely precise adjustment is possible.

In order to determine the pull-out speed of a yarn group or one yarn, the measuring device is preferably composed of a rotation speed sensor. The rotation speed sensor is arranged corresponding to the thread guide roller or the godet. Therefore, the pull-out speed of the yarn group wound around the freely rotatable yarn guide roller can be obtained from the rotation speed of the yarn guide roller in a simple form. The yarn guide roller is configured such that the yarn group is guided around the yarn guide roller with virtually no slip. However, as an alternative, a rotation speed sensor may be placed with respect to the driven godet, and the rotation speed of the godet may infer the pull-out speed that enables slip-free yarn guidance when the yarn group is set. Occurs.

In order to measure the withdrawal speed in a non-contact manner, the measuring device preferably has a capacitive sensor device. The capacitive sensor device is arranged at intervals in one of a group of threads or a plurality of threads in the group of threads. As a result, the current pull-out speed of the thread group can be obtained without contact. During the automated operation of the suction device, the device is preferably configured such that the control unit has a processor for storing and executing the control program, and the control program allows multiple gimmick steps. The target withdrawal speed of is preset to change the operating pressure. Therefore, the order of changing the operating pressure is controlled through the control program.

A plurality of winding devices are arranged in the melt spinning device. These take-up devices are operated by suction devices as needed. To that extent, a variant of the device according to the invention in which the control valve, control unit and measuring device are disposed together in the suction device is particularly advantageous. As a result, it is possible to detect the withdrawal speed and adjust the operating pressure in the suction device based on the detection of the withdrawal speed regardless of the respective spinning positions.

The suction device is preferably configured as a movable suction gun that is manually or automated and guided.

However, as an alternative, the suction device may be implemented as a fixed suction unit disposed on the take-up device.

The method according to the present invention will be described in detail below with reference to the accompanying drawings with respect to a plurality of examples of the apparatus according to the present invention for setting a yarn group in a melt spinning process.

It is the schematic which shows the 1st Example of the apparatus which concerns on this invention for setting a yarn group in a melt spinning process. It is the schematic which shows another Example of the apparatus which concerns on this invention for setting a yarn group in a melt spinning process. It is the schematic which shows one Example of the suction apparatus for the apparatus shown in FIG. FIG. 5 is a schematic diagram showing another embodiment of a suction device for the device shown in FIG.

FIG. 1 schematically shows a first embodiment of an apparatus according to the present invention for setting a yarn group in a melt spinning process. In this case, simply one take-up device is shown with multiple godets. The take-up device is usually located below the spinning position of the spinning device for extruding a group of yarns.

In such a spinning apparatus, it is usual that a freshly spun yarn is pulled out by a godette and, after drawing, is wound in parallel at a plurality of winding points to form a package. To that extent, FIG. 1 shows a take-up device 2 having a plurality of take-up points 3.1-3.4 and a plurality of godets 11 arranged on the take-up points 3.1-3.4. .1 to 11.3 are shown schematically.

The godets 11.1 to 11.3 are held so as to project on the godet support 12. The godet support 12 is supported by the mechanical frame 13 of the take-up device 2. Godets 11.1-11.3 are connected to a drive (not shown).

In this embodiment, the take-up device 2 has four take-up points 3.1 to 3.4, whereby the yarn group 21 formed from the four yarns is wound to form a package. be able to. The number of threads and the number of winding points are exemplary. Therefore, in one yarn group, 10, 12 or 16 yarns can be wound side by side in parallel to form a package. For this purpose, two take-up spindles 4.1 and 4.2 are held so as to project in a rotatably bearing winding tube revolver 6. The take-up spindles 4.1 and 4.2 are driven via separate spindle drives 5.1 and 5.2. Since the winding tube revolver 6 is connected to the revolver drive device 6.1, the winding spindles 4.1 and 4.2 can be alternately guided to the operating region and the replacement region. In the operating area, the take-up spindles 4.1 and 4.2 cooperate with the pressing roller 7.

A twill swing device 8 is provided for laying the thread. The twill swing device 8 has one twill swing unit for each winding location 3.1 to 3.4.

The twill swing device 8 is preliminarily provided with one separate thread guide roller 9.1 to 9.4 for each winding location 3.1 to 3.4. The thread guide rollers 9.1 to 9.4 are freely rotatably held by the movable roller support 10. The yarn guide rollers 9.1 to 9.4 work to separate the yarn group 21. The thread group 21 is guided by a single winding in Godet 11.1-11.3 during operation.

A movable suction device 1 is provided for setting and threading the threads of the thread group 21. With this suction device 1, the operator (not shown) guides the running thread to set and thread the godet 11.1-11.3 and the take-up points 3.1-3.4. In this embodiment, the suction device 1 is configured as a suction gun 15 and has a tube piece 14. The tube piece 14 forms a suction opening 18 at the free end. The pipe piece 14 is held by the connecting member 30 and is connected to the waste pipe line 19. In order to form a suction flow in the pipe piece 14, the compressed air pipe line 16 is connected to the connecting member 30. The compressed air pipeline 16 opens into the suction passage of the pipe piece 14 through an injector hole (not shown). In this embodiment, the control valve 17 is attached to the connecting member 30. The control valve 17 is connected to the compressed air pipeline 16, whereby the operating pressure of the supplied compressed air and thus the suction output of the pipe piece 14 can be changed.

The control valve 17 of the suction device 1 is wirelessly connected to the control unit 25 in this embodiment. For this purpose, the control unit 25 has a transmitter 26 and the control valve 17 has a receiver 27.

The suction device 1 is connected to the waste container 20 via the waste pipe line 19. The compressed air pipeline 16 connects the suction device 1 to the compressed air source 22.

In the embodiment shown in FIG. 1, a measuring device 23 for detecting the withdrawal speed of the yarn group 21 is correspondingly arranged in the winding device 2. The measuring device 23 has a rotation speed sensor 24.1. The rotation speed sensor 24.1 is arranged so as to face the Godet 11.1. The rotation speed sensor 24.1 is connected to the control unit 25. Here, the pull-out speed of the thread guided in Godet 11.1 of the thread group 21 is obtained from the rotation speed of Godet 11.1.

Alternatively or additionally, a second rotational speed sensor 24.2 is provided. The second rotation speed sensor 24.2 is assigned to one of the thread guide rollers 9.1 to 9.4. The rotation speed sensor 24.2 is illustrated by a broken line in FIG. The rotation speed sensor 24.2 is also connected to the control unit 25.

In the situation illustrated in FIG. 1, the suction device 1 is in one step for setting the thread group 21 on the take-up device 2. For this purpose, the suction device 1 is configured as a movable suction gun 15. The suction gun 15 is operated by an operator in this embodiment. Therefore, it is usual that the yarn group 21 is continuously pulled out from the spinning apparatus by the suction apparatus 1. From the rotation speed of Godet 11.1 via the rotation speed sensor 24.1, the control unit 25 so that the desired withdrawal speed can be caused when the thread group 21 is set on Godet 11.1 to 11.3. The pull-out speed of the thread group 21 is obtained within. The withdrawal speed is now used in the suction device 1 to regulate the suction flow required for this. When the operating pressure in the suction device 1 is increased by the control valve 17, a higher suction action is generated in the tube piece 14 in order to pull in and lead out the yarn group. Since this increases the pull-out speed of the yarn group, the yarn group can be set in Godette 11.1-11.3 with substantially no slip.

In another process, or as an alternative, the rotation speed of one of the plurality of yarn guide rollers 9.1 to 9.4 is detected by the rotation speed sensor 24.2, and the yarn group is detected in the control unit 25. There is also the possibility of specifying the withdrawal speed of one of the 21 plurality of threads. Again, the thread withdrawal speed is used in the suction device 1 to obtain the desired suction output for the corresponding operating pressure adjustment and thus for the specified withdrawal speed.

Therefore, different withdrawal velocities within the individual gimmick steps are set by adjusting the operating pressure in the suction device.

In particular, in order to be able to accurately detect the current actual state of the withdrawal speed, FIG. 2 illustrates another embodiment of a device for setting a thread group. Since the embodiment shown in FIG. 2 is almost the same as the embodiment shown in FIG. 1, only the difference will be described here, and the above description will be referred to for other points.

In the embodiment shown in FIG. 2, the measuring device 23 for detecting the withdrawal speed of the thread group 21 is directly arranged on the suction device 1. For the description of the suction device 1, FIG. 3 can be additionally referred to.

As can be seen from the drawing of FIG. 3, the measuring device 23 is formed by a thread guide roller 28 which is supported so as to be freely rotatable. The thread guide rollers 28 are arranged in front of the suction opening 18 of the tube piece 14 at short intervals. The thread guide roller 28 is held by the holding portion 29 in the connecting member 30. A rotation speed sensor 24.2 is correspondingly arranged on the thread guide roller 28. The rotation speed sensor 24.2 is connected to the control unit 25. The control unit 25 is similarly held by the connecting member 30 of the suction device 1. The control unit 25 is directly connected to the control valve 17.

The suction device 1 is also configured as a suction gun in this embodiment. The suction gun can be guided manually or automatically. Therefore, the pipe piece 14 is connected to the waste pipe line 19 via the connecting member 30. Since the compressed air pipeline 16 is correspondingly arranged in the control valve 17, the operating pressure in the connecting member 30 can be controlled in order to form the suction flow.

A processor (not shown) for storing and executing a control program is provided in the control unit. The control program presets a plurality of target withdrawal velocities of a plurality of gimmick steps for changing the operating pressure. Therefore, the control program adjusts the pull-out speed of the yarn group to a predetermined target pull-out speed of the yarn group, for example, at the start of the tacking process, based on an actual-target value comparison of the pull-out speed. The actual pull-out speed is continuously detected via the rotation speed of the thread guide roller 28 and evaluated in the control unit 25 to match the target pull-out speed. To that extent, the suction action of the suction device 1 is adjusted very accurately to the desired withdrawal speed.

In the situation shown in FIG. 2, the yarn group is separated into yarn guide rollers 9.1 to 9.4. In this case, the pull-out speed of the yarn group 21 is directly detected by the yarn guide roller 28 and the rotation speed sensor 24.2 in the suction device 1. To that extent, the control unit 25 and the control valve 17 adjust the desired pull-out speed of the thread group 21 each time. The separation is performed by the guide of the suction gun 15 in cooperation with the movement of the roller support 10. This situation is illustrated by a broken line in FIG.

After the separation is performed, the roller support 10 is fixed in the operating position. Now, the suction gun 15 is positioned at the delivery position. At this delivery position, an auxiliary device (not shown) sets the yarn at the take-up points 3.1-3.4. In this case, the withdrawal speed of the yarn group is continuously measured, whereby the desired target withdrawal speed of the yarn group can be maintained each time. The pressure setting in the suction device changes accordingly.

In the embodiment illustrated in FIG. 2, the measuring device 23 is configured to be able to measure the pull-out speed of the yarn group 21 in a non-contact manner. For this purpose, another embodiment is illustrated in FIG.

In the embodiment of the suction device 1 illustrated in FIG. 4, the measuring device 23, the control unit 25, and the control valve 17 are integrated into the suction device 1 to form one unit. The suction device is also configured as the suction gun 15 in this embodiment. In order to detect the withdrawal speed of the thread group running into the suction opening 18 of the tube piece 14, the capacitive sensor device 31 approaches the suction opening 18 of the tube piece 14 at short intervals, that is, by the holding portion 29. It is being held. The sensor devices 31 are spaced apart from the thread group 21 so that the pull-out speeds in the thread group can be detected without contact.

The mode of action of the suction device 1 shown in FIG. 4 is the same as that of the suction device shown in FIG. To that extent, the above description is referred to to avoid repetition.

The suction device 1 illustrated in FIGS. 3 and 4 is exemplary. Therefore, such a suction gun 15 is also advantageously automated and guided by, for example, a robot arm. In this case, the control valve 17 and the measuring device 23 may be connected to the robot control device.

Similarly, there is a possibility that such a suction device is fixedly configured and integrated into a take-up device. In this case, the control valve 17 may be assigned to the compressed air source 22 as shown by the broken line in FIG.

The method according to the present invention and the apparatus according to the present invention can be used both at the start of the process of the melt spinning process and after the process is interrupted in the melt spinning process. Therefore, the yarn group is picked up by the suction device immediately after the start of spinning. Similarly, there is the possibility that the yarn group will be picked up by a fixed suction device after the process is interrupted. What is important in this case is that the pull-out rate of the yarn group is measured to regulate the suction action.

Claims (16)

A method for setting a yarn group in a melt spinning process, comprising at least one take-up device with a plurality of godets and a plurality of take-up points postfixed to the godet, in which the yarn group is sucked by a suction flow. The suction flow in the tube piece is sucked into the suction opening of the tube piece of the device and continuously led out, and the thread group is superposed and guided by the movement of the tube piece and / or the thread guide. In the method of controlling by the controllable operating pressure of the compressed air supplied to the suction device,
The operating pressure of the compressed air may be changed in order to change the suction flow depending on the withdrawal speed of the yarn group and / or the withdrawal speed of one of the plurality of yarns of the yarn group. A characteristic method for setting a yarn group in a melt spinning process. The method according to claim 1, wherein the withdrawal speed of the yarn group or the withdrawal speed of the yarn is measured by direct contact with the yarn group or the yarn, or non-contactly. The second aspect of the present invention, wherein the withdrawal speed of the yarn group or the withdrawal speed of the yarn is determined by measuring the number of rotations of a freely rotatable yarn guide roller around which the yarn group or the yarn is partially wound. Method. The method according to claim 2, wherein the withdrawal speed of the yarn group is determined by measuring the rotation speed of one of the godets in which the yarn group or the yarn is partially wound. The method according to claim 2, wherein the withdrawal speed of the yarn group or the withdrawal speed of the yarn is detected non-contactly by a capacitive sensor device. The method according to claim 1 or 2, wherein the withdrawal speed of the thread group is measured at a short interval with respect to the suction opening of the tube piece of the suction device. In order to adjust the operating pressure, the target drawing speed of the yarn group is set in advance, and when the measured actual drawing speed is the same as the target drawing speed, the operating pressure is achieved. , The method according to any one of claims 1 to 6. The method according to claim 7, wherein a plurality of target drawing speeds of the yarn group for a plurality of gimmick steps are preset. A device for setting a group of yarns in a melt spinning process, which is a plurality of godets (11.1, 11.2) and a plurality of winding points (3) postfixed to the godets (11.1, 11.2). A suction device (1) having at least one take-up device (2) with 1 to 3.4) and a tube piece (14) with a suction opening (18) to form a suction flow. It is possible to adjust the operating pressure of the compressed air with the suction device (1) which is connected to the compressed air pipeline (16) and is connected to the waste container (20) by the waste pipeline (19). In a device equipped with a capable control valve (17)
A measuring device (23) for detecting the withdrawal speed of the thread group (21) or a measuring device (23) for detecting the withdrawal speed of one of the plurality of threads of the thread group (21) is provided. The measuring device (23) is connected to the control unit (25), the control unit (25) is connected to the control valve (17), and the control valve (17) is used. An apparatus for setting a yarn group in a melt spinning process, wherein the operating pressure of the compressed air is changed to change the suction flow depending on the drawing speed. The measuring device (23) is arranged in the suction device (1) in order to detect the pulling speed of the thread group before the tube piece (14) enters the suction opening (18). The device according to claim 9. In order to detect the pulling speed of one of the yarn group (21) or the plurality of yarns of the yarn group (21), the measuring device (23) is arranged in the winding device (2). The device according to claim 9. The measuring device (23) has at least one rotation speed sensor (24, 1, 4.2), and the rotation speed sensor (24, 1, 4.2) is a freely rotatable thread. The device according to any one of claims 9 to 11, which is disposed on a guide roller (9.1, 28) or a driven godette (11.1). The measuring device (23) has at least one capacitive sensor device (31), and the sensor device (31) is one of the yarn group (21) or a plurality of yarns of the yarn group. The device according to any one of claims 9 to 11, which is arranged at intervals with respect to the yarn. Because the control unit (25) has a processor for storing and executing a control program, the control program allows a plurality of target withdrawal speeds for a plurality of gimmick steps to change the operating pressure. The apparatus according to any one of claims 9 to 13, which is preset in. The one according to any one of claims 9 to 14, wherein the control valve (17), the control unit (25), and the measuring device (23) are arranged together in the suction device (1). Device. The device according to any one of claims 9 to 15, wherein the suction device (1) is configured as a movable suction gun (15) that is manually or automatically guided.

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