JP7516473B2 - Method and apparatus for laying down multiple spun yarns - Patents.com - Google Patents

Description

The present invention relates to a method for setting up multiple yarns at multiple winding points of a winding machine, as described in the generic part of claim 1, and to an apparatus for setting up multiple yarns at multiple winding points of a winding machine, as described in the generic part of claim 5.

When producing synthetic yarns in a melt spinning process, it is common for several yarns to be spun in parallel alongside one another in one spinning station by a spinning nozzle. After individual processing of the yarns according to yarn type, the yarns are wound into packages by winding spindles at several winding points of a winding machine. Such melt spinning apparatus are disclosed, for example, in WO 1999/037835.

In case of a fault in the process, a suction device is provided below the spinning device, in which the threads produced by the spinning nozzle are continuously collected and discharged into a waste container. This ensures that the extrusion of the thread at the spinning nozzle does not have to be interrupted.

As soon as the process disturbance has been eliminated, the yarn needs to be re-wound at the winding point of the winding machine. For this purpose, the yarn flock is usually received by means of a manually guided suction gun and guided for re-wound by the operator. The operator must then disconnect the yarn flock from the stationary suction device and transfer it to the manually guided suction gun. The suction gun is then guided towards the winding machine, so that an auxiliary device arranged on the winding machine captures the yarn flock and delivers it to the winding point for re-wounding. In this respect, the usual method for re-wounding multiple yarns at multiple winding points is very cumbersome to operate.

The object of the present invention is therefore to provide a method and an apparatus for setting up multiple yarns at multiple winding points of a winding machine, which allows the yarn groups to be fed to the winding points as quickly and reproducibly as possible.

Another object of the present invention is to automate the method and apparatus for laying multiple spun yarns as much as possible.

To solve this problem, the method according to the present invention involves capturing the yarn group by a guide means at one yarn portion before it enters the suction device and feeding it as a yarn loop to a stationary suction device below the winding spindle.

In the device according to the invention, which accordingly solves this problem, the winding machine has a lower, stationary suction device below the winding spindle, and the lower suction device cooperates with a movable guide means by means of which the yarn bundle received by the upper suction device can be fed as a yarn loop to the lower suction device.

Preferred developments of the invention are defined by the features and feature combinations of the respective dependent claims.

The invention is based on the recognition that the yarns received by the stationary suction device are radially gathered into a focal point when withdrawn from the spinning nozzle. The individual yarns are therefore guided with a height-dependently varying yarn spacing. To utilize this effect, the invention now provides for a lower stationary suction device to be installed below the winding spindle, to which the yarn bundle is transferred by means of a guide means, which then captures the yarn bundle immediately before the entry point in the upper suction device in the portion of the yarn bundle where the yarns are guided in a substantially bundle-like shape. After the transfer of the yarn bundle to the lower stationary suction device, the radially fed yarns can be conveniently captured and set up in the area of the winding point.

The device according to the invention has for this purpose a lower stationary suction device, which is arranged below the winding spindle of the winding machine. The lower suction device then cooperates with a movable guide means, by means of which the yarn strand received by the upper suction device can be fed as a yarn loop to the lower suction device. Therefore, no manual handling steps are required to set up the yarn strand at the winding point of the winding machine.

In order to enable a defined take-up of the yarn bundle into the lower suction device and a defined capture by the lower suction device, according to a preferred variant of the invention, the yarn strand of the yarn loop is cut by a cutting means. The yarn strand that is generated between the upper suction device and the guide means is then fed to the cutting means. The cutting means is therefore arranged directly corresponding to the lower suction device.

In order to keep the yarn tension that occurs when loops are formed in the yarn bundle as small as possible, the guide means has a freely rotatable guide roller that is held by a movable roller holder. With this configuration, the yarn bundle can be guided along the guide means without slippage.

Since the yarn group usually requires a counter resistance to prevent the yarn group from escaping during cutting, in a preferred development of the invention, the guide roller can be guided between the collection position and the take-up position by the roller holder, and the guide roller cooperates with the lower suction device in the take-up position. In this way, the fixed environment can be directly utilized to improve the cutting and take-up of the yarn group by the lower suction device.

To allow engagement with the yarn bundle from outside the winding point, the roller holder is further formed by a pivot arm and a guide carriage, the pivot arm being arranged on a height-movable guide carriage, the pivot arm holding the guide roller at its free end, the guide carriage being guided along the guide rail by a carriage drive, and the pivot arm being controlled by the pivot drive.

To be able to complete the process for setting up the yarn at the winding point, the winding machine has an auxiliary device by means of which the yarn group can be captured at a yarn portion before it enters the lower suction device and can be fed to the winding point. Due to the height difference between the lower suction device and the auxiliary device, the yarn spacing occurring between the individual yarns of the yarn group can be advantageously utilized to allow the selection of the yarn to be set up at the winding point.

The method according to the invention and the device according to the invention for setting up multiple yarns at multiple winding points of a winding machine thus offer the great advantage that relatively short interruption times can be achieved after the occurrence of a fault in the melt spinning process. By means of predefined control algorithms, the setting up of the yarns at the winding points of the winding machine can be carried out in an automated manner. This allows manual intervention during the melt spinning process to be focused solely on removing the fault.

The method according to the present invention will now be described in detail with reference to the accompanying drawings, using an embodiment of the device according to the present invention for setting up multiple yarns at multiple winding points of a winding machine.

1A-1D are schematic side views of an embodiment of the device according to the invention in several operating situations; 1A-1D are schematic side views of an embodiment of the device according to the invention in several operating situations; 1.2-1.3 show schematic front views of the embodiment shown in FIG. 1.1 in different operating situations; 1.2-1.3 show schematic front views of the embodiment shown in FIG. 1.1 in different operating situations; FIG. 1.2 shows a schematic side view of the embodiment shown in FIG. 1.1 in operation.

1.1 and 2.1 show an embodiment of the device according to the invention in a schematic view in several views. In 1.1, the embodiment is shown in a side view, and in 2.1, the embodiment is shown in a front view. The following description refers to both figures, unless one of the figures is highlighted. The embodiment is incorporated in a melt spinning apparatus for producing a synthetic thread. The melt spinning apparatus has a spinning device 1, a cooling device 2, a godet device 5 and a winder 6 arranged one above the other. Here, basically, such a melt spinning apparatus may include further process assemblies, such as, for example, an oil supply device, an interlacing device, a texturing device and/or a crimping device. The configuration of the godet device 5 is also exemplary.

The spinning device 1 has a heated spinning beam 1.1, which holds several spinning nozzles 1.2 on its underside. In the present embodiment, the spinning nozzles 1.2 are configured as so-called double nozzles, so that two threads are extruded from each spinning nozzle 1.2. The spinning nozzles 1.2 are connected to a spinning pump 1.3. The spinning pump 1.3 is configured as a multi-pump and is connected via a melt supply 1.4 to a melt source, not shown here, for example an extruder.

Below the spinning device 1, a cooling device 2 is arranged, which has a blowing chamber 2.2 and a cooling duct 2.1. The cooling duct 2.1 can be formed, for example, by a cooling cylinder arranged inside the blowing chamber 2.2. The blowing chamber 2.2 is connected to an air conditioning device, not shown here. The cooling duct 2.1 has a gas-permeable wall, so that the extruded yarn is cooled by the air-conditioning air flowing from the blowing chamber 2.2 into the cooling duct 2.1. Below the cooling duct 2.1, a drop duct 2.3 is connected. Inside the drop duct 2.3, one collective yarn guide 3 is provided below the cooling duct 2.1 for each spinning nozzle 1.2. The collective yarn guide 3 separates the yarns extruded as multiple filaments from each other and brings them together into a filament bundle.

Below the drop duct 2.3 is a godet device 5, which has a number of protruding godets 5.1, 5.2 held in a holder 5.4. A godet drive 5.3 is respectively associated with each of the godets 5.1, 5.2 on the rear side of the holder 5.4.

The holder 5.4 of the godet device 5 is supported on the machine frame 6.10 of the winding machine 6.

The winding machine 6 has a rotatably supported winding turret 6.3, which holds two protrudingly supported winding spindles 6.2. The winding spindles 6.2 are connected to a spindle drive 6.4. The winding turret 6.3 is rotatable via a turret drive 6.5, so that the winding spindles 6.2 can be pivoted alternately between the working area and the exchange area.

In the operating area, the winding spindle 6.2 operates at a number of winding points 6.1. In the present embodiment, a total of four winding points 6.1 are formed in the winding machine 6. The winding points 6.1 are identically constructed and each have a deflection roller 6.9 and a traverse device 6.7. The deflection rollers 6.9 are arranged downstream of the godet device 5 for distributing the yarn to the winding points 6.1. The traverse devices 6.7 each have a traverse means for each yarn for guiding the yarn back and forth. To tack the yarn around the wound package, a pressure roller 6.6 is provided, which runs parallel to the winding spindle 6.2.

In order to be able to collect the extruded yarns in the event of a fault, a stationary suction device 4 is provided above the godet device 5. The device, shown here as the upper suction device 4, has a yarn collector 4.3, by means of which the yarn group 9 can be collected in the event of a fault and fed via the suction opening 4.1 and the waste line 4.2 to a waste container, not shown in detail here. For this purpose, a cutting blade 4.4 is assigned to the yarn collector 4.3, by means of which a yarn end is generated at the yarn group 9 for sucking into the suction opening 4.1.

To feed the yarns of the yarn group 9 at the winding point 6.1, a lower suction device 7 is assigned to the winding machine 6. The lower suction device 7 is arranged below the winding spindle 6.2. The lower suction device 7 has an suction opening 7.1 and a waste duct 7.2 which cooperate to receive the yarn group and to discharge it into a waste container. A cutting means 7.3 is assigned to the suction opening 7.1. The cutting means 7.3 is preferably formed by one or more blades, which are capable of cutting the yarn group with as little cutting resistance as possible.

The upper suction device 4 and the lower suction device 7 cooperate with a guide means 8, which allows the yarn group to be transferred from the upper suction device 4 to the lower suction device 7.

In the present embodiment, the guide means 8 is formed by a freely rotatable guide roller 8.1, which is held on a pivot arm 8.2. The pivot arm 8.2 is configured to be pivotable transversely to the yarn running direction via a pivot drive 8.3. The pivot arm 8.2 and the pivot drive 8.3 are arranged on a guide carriage 8.4. The guide carriage 8.4 can be guided back and forth along a vertically oriented guide rail 8.5 by a carriage drive 8.6. For this purpose, the guide rail 8.5 is arranged laterally with respect to the end face of the winding machine 6.

In Fig. 1.1 and Fig. 2.1, the melt spinning device is shown in an operating state, in which the yarn spool 9 is continuously discharged via the upper suction device 4 into a waste container. The godet arrangement 5 and the winding machine 6 are in a setup mode in order to be able to receive the yarn spool 9. For this purpose, the movably held godet 5.1 of the godet arrangement 5 has been moved into a setup position, as shown by the dashed lines in Fig. 1.1. The winding machine 6 has an auxiliary device 6.8, which in this case is formed as a movable roller holder 6.8 which holds a deflection roller 6.9. The roller holder 6.8 is held in the extended position (shown by the dashed lines). The guide means 8 is now guided into the collecting position. In the collecting position, the guide carriage 8.4 is held in an upper position on the guide rail 8.5. The pivot arm 8.2 with the guide roller 8.1 is pivoted inwardly via the pivot drive 8.3 into the yarn path of the yarn spool 9, whereupon the guide roller 8.1 captures the yarn spool 9 directly at the yarn section directly above the suction device 4. As soon as the yarn spool 9 has been guided around the guide roller 8.1, the guide carriage 8.4 is driven by the carriage drive 8.6. The guide carriage 8.4 is guided out of the collecting position and into the lower receiving position at the lower end of the guide rail 8.5. A yarn loop 9.1 is then formed at the guide roller 8.1. The yarn extruded from the spinning nozzle 1.2 is still received by the suction device 4 and winds around the guide roller 8.1. This situation is shown by dashed lines in Figs. 1.1 and 2.1.

In the melt spinning apparatus shown in Fig. 1.2 and Fig. 2.2, the yarn bundle 9 is received and guided by the lower suction device 7. For this purpose, the guide means 8 is in the lower take-up position, and the yarn bundle at the guide roller 8.1 is fed by the pivot arm 8.2 to the cutting means 7.3 and the suction opening 7.1 of the lower suction device 7. The cutting means 7.3 cuts the guided yarn strand of the yarn loop 9.1 between the suction device 4 and the guide roller 8.1. After the cutting of the yarn bundle 9, the formed end is then received by the suction opening 7.1 of the lower suction device 7. This state is shown in Fig. 1.2 and Fig. 2.2.

The pivoting arm 8.2 with the guide roller 8.1 is guided into a neutral position. The auxiliary device 6.8 is now started to operate in order to set up the yarn at the winding point 6.1. The deflection rollers 6.9 held on the movable roller holder 6.8 are held in the setting position offset from one another in accordance with the yarn spacing shown in FIG. 2.2, so that by a simple pushing movement the take-up of the guided yarn at a certain yarn spacing is selected and transferred to the winding point. The height distance between the auxiliary device 6.8 and the lower suction device 7 is adapted so that the predetermined yarn spacing shown in FIG. 2.2 between the yarns of the yarn group 9 occurs in the area of the auxiliary device 6.8.

Finally, the godet 5.1 of the godet device 5 is transferred from the setup position to its working position, whereby the melt spinning device is ready for the continuous production of synthetic yarns. In FIG. 3, the melt spinning device is shown in normal operating condition. The yarns of the yarn group 9 are wound into a package.

The auxiliary device for selecting the yarn group when feeding it into the winding point shown in the above-mentioned embodiment is an example. What is essential for the method according to the invention and the device according to the invention is the connection between the upper and lower stationary suction devices with suitable guide means for forming the yarn loop. Instead of guide rollers, it is also possible to use yarn guides or yarn rods as guide means.

Claims (6)

1. An apparatus for laying up a number of spun yarns at a number of winding points (6.1) of a winding machine (6), the winding points (6.1) being arranged next to one another along a projecting winding spindle (6.2), the apparatus being provided with a spinning device (1) having a number of spinning nozzles (1.2) for spinning the yarns, and with a stationary suction device (4) above the winding machine (6), by means of which the yarns are drawn off from the spinning nozzles (1.2) and guided as a yarn bundle (9) and discharged into a waste bin,
1. The winding machine (6) comprises a stationary lower suction device (7) below the winding spindle (6.2) and which cooperates with movable guide means (8) by means of which the yarn bundle (9) received by the upper suction device (4) can be fed as a yarn loop (9.1) to the lower suction device (7) , and each winding point (6.1) comprises a deflection roller (6.9) arranged above the lower suction device (7) . the lower suction device (7) has cutting means (7.3) by means of which the yarn strand of the yarn loop (9.1) guided by the guiding means (8) can be cut;
2. The apparatus of claim 1 . The guide means (8) is formed by a rotatable guide roller (8.1) which is held in a movable roller holder (8.2, 8.4).
3. The device according to claim 1 or 2 . the guide roller (8.1) can be guided between a collecting position and a receiving position by the roller holder (8.2, 8.4), and the guide roller (8.1) is adapted to cooperate with the lower suction device (7) in the receiving position,
4. The apparatus of claim 3 . the roller holder is formed by a pivot arm (8.2) and a guide carriage (8.4), the pivot arm (8.2) being arranged on the height-movable guide carriage (8.4), the pivot arm (8.2) holding the guide roller (8.1) at its free end, the guide carriage (8.4) being guided along a guide rail (8.5) by a carriage drive (8.6), and the pivot arm (8.2) being controllable by a pivot drive (8.3);
5. Apparatus according to claim 3 or 4 . the winding machine has an auxiliary device (6.8) by means of which the yarn bundle can be captured at a yarn portion before it enters the lower suction device (7) and can be fed to the winding point (6.1),
6. An apparatus according to any one of claims 1 to 5 .