DE102022003902A1 - Method for starting a melt spinning, stretching and winding process - Google Patents

Abstract

The present disclosure relates to a method for starting a melt spinning, stretching and winding process of at least one thread (1) with little operating and/or material expenditure with the following steps, which are preferably carried out in the order given. Taking up the thread (1) from a melt spinning mill (2), preferably by means of a thread gun (3). Applying the thread (1) to a stretching device (4) with preferably at least one godet (4.1 to 4.9). Applying the thread (1) to a sleeve (5) in order to subsequently wind the thread (1) on the sleeve (5) to form a coil (6), wherein the sleeve (5) is rotated at a applying speed by means of a winding machine (7) during the applying. Accelerating the sleeve (5) from the applying speed to a winding speed. Changing at least one parameter of the melt spinning mill (2), the stretching device (4) and/or the winding machine (7) in order to indicate the beginning of a winding phase by a corresponding change in the thread and/or bobbin properties.

Description

The present invention relates to a method for starting a melt spinning, stretching and winding process, in particular a method for starting a melt spinning, stretching and winding process of at least one thread with the following steps, which are preferably carried out in the order given. Taking up the thread from a melt spinning mill, preferably by means of a thread gun. Applying the thread to a stretching device, preferably with at least one godet. Applying the thread to a sleeve in order to subsequently wind the thread on the sleeve into a spool, the sleeve being rotated at a applying speed by means of a winding machine during application. Accelerating the sleeve from the applying speed to a winding speed.

In processes for starting a melt spinning, stretching and winding process of the type mentioned above, an inferior thread is produced before the tube has reached the winding speed. An inferior thread is a thread that does not meet the desired specifications, for example, of a customer and which can therefore lead to problems in further processing. These can be problems of many kinds depending on the further processing process, such as the production of inferior end products such as textiles. However, it can also be the case that machines in further processing cannot be operated at all due to such inferior threads. In any case, it must be prevented that such inferior threads end up in machines for further processing. To avoid this, a so-called bobbin change is usually carried out after the tube has been accelerated to the winding speed. A new tube is brought into engagement with the thread and the thread is then wound onto this new tube, whereby this new tube is rotated directly at the winding speed by means of the winding machine and thus a thread of the desired quality is wound onto the new tube right from the start.

The tube, on which a thread of inferior quality is already wound, is removed by hand from the winding machine and this thread is removed from the tube by hand and subsequently disposed of. The tube can then be reused. These manual processes are complex and still prone to errors. For example, spools show a loss of quality if there are still remnants of thread that has not been completely removed on a corresponding tube at the beginning of the winding process. It is also conceivable that a tube is disposed of with the loss of this tube including the inferior thread wound on it. In the melt spinning, stretching and winding process described, threads are made from a plastic such as PP, PA, PE and/or PET.

From the EN 10 2017 001 090 A1 Such a method for starting a melt spinning, stretching and winding process is known from DE 192 00 44 47 5. In particular, it is described how several threads from the melt spinning mill are taken up with the thread gun, whereby the threads are first bundled by means of a thread gathering device. Furthermore, a holder for the thread gun is provided adjacent to the thread path. The method according to DE 192 00 44 47 5. EN 10 2017 001 090 A1 In particular, it also has the problems described above with regard to winding up an inferior yarn at the beginning of the process for starting the melt spinning, drawing and winding process.

The present invention is based on the object of providing a method for starting a melt spinning, stretching and winding process which reduces or eliminates the problems of the prior art. In particular, the operating effort for carrying out the method and/or the material expenditure required for carrying out the method should be reduced.

This object is achieved by a method for starting a melt spinning, stretching and winding process according to claim 1.

Further advantageous embodiments are the subject of the subclaims.

1. a) Aufnehmen des Faden aus einer Schmelzspinnerei vorzugsweise mittels einer Fadenpistole,
2. b) Anlegen des Fadens an eine Streckeinrichtung mit vorzugsweise zumindest einer Galette,
3. c) Anlegen des Fadens an eine Hülse, um nachfolgend den Faden auf der Hülse zu einer Spule aufzuwickeln, wobei die Hülse während des Anlegens mittels einer Aufwickelmaschine mit einer Anlegeschwindigkeit rotiert wird,
4. d) Beschleunigung der Hülse von der Anlegeschwindigkeit auf eine Aufwickelgeschwindigkeit,
5. e) Ändern zumindest eines Parameters der Schmelzspinnerei, der Streckeinrichtung und/oder der Aufwickelmaschine, um durch eine korrespondiere Änderung der Faden- und/oder Spuleneigenschaft den Beginn einer Aufwickelphase zu kennzeichnen.

More specifically, the object is achieved by a method for starting a melt spinning, stretching and winding process of at least one thread with the following steps, which are preferably carried out in the specified order:

1. a) picking up the yarn from a melt spinning mill, preferably by means of a yarn gun,
2. b) applying the thread to a stretching device with preferably at least one godet,
3. c) applying the thread to a tube in order to subsequently wind the thread onto the tube to form a spool, the tube being rotated at a feed speed by means of a winding machine during the application,
4. d) Acceleration of the core from the feed speed to a winding speed,
5. e) Changing at least one parameter of the melt spinning, the drawing device and/or of the winding machine in order to mark the beginning of a winding phase by a corresponding change in the thread and/or bobbin properties.

The advantage of this type of marking is that the process of melt spinning, stretching and winding can be continued without interruption. Furthermore, no manual operations are required by a worker. Furthermore, only one sleeve is required for the start of the melt spinning, stretching and winding process per thread. For the sake of simplicity, the inferior thread, in particular the thread wound up at the feed speed, is referred to as the waste thread, and the thread with the desired properties, which is wound up in particular at the winding speed, is referred to as the useful thread. The winding of useful thread preferably begins at the same time as the winding phase. However, it is also conceivable that the desired properties of the thread are achieved before the start of the winding phase, e.g. to minimize the risk of a waste thread being wound up during the winding phase and/or to be able to create a particularly easily detectable marking. In particular, a spool width and the position of the spool to the sleeve remain essentially the same during step e), so that the waste thread is overwound by the useful thread. A spool produced in this way therefore has a waste area up to a certain spool diameter, namely up to the marking. This waste area is followed by a useful area which extends up to the final spool diameter. In a further processing step in which the spool is unwound again, the useful thread is unwound and processed first. The marking can then prevent the spool from being unwound any further and the waste thread from entering the further processing step.

Advantageously, within the scope of step e), a preferably sudden change in a traversing frequency of a traversing device of the winding machine takes place.

According to a preferred embodiment of the method, in step e), the change in the traversing frequency leads to a change in a crossing ratio in the context of a step precision winding or to another mirror disturbance method.

The traversing frequency can be easily changed and there is a small risk that this will cause problems with the bobbin build-up. Furthermore, the traversing frequency can be changed in such a way that the thread breaks during further processing due to this change, thus preventing the waste thread from being processed further. On the other hand, such a change in the traversing frequency during further processing could also be easily detected, for example using appropriate sensors such as a thread monitor, in order to avoid the waste thread from being processed further.

Further preferably, in step e), a rotational speed of a sensing roller of the winding machine that contacts a surface of the coil is set such that a surface speed of the sensing roller essentially corresponds to a surface speed of the coil. The sensing roller is previously operated such that the surface speed of the sensing roller is less than or greater than the surface speed of the coil.

Such a sensing roller is used in particular to detect the surface speed of the coil, especially during the winding phase, and to use this to regulate the speed of the tube. In order to achieve the speed difference mentioned, the sensing roller could be accelerated by means of an associated motor or braked by means of an associated brake.

In a further embodiment of the method, thermal bonding of thread layers of the bobbin occurs by operating the sensing roller with a lower or higher surface speed compared to the bobbin.

Thermal bonding means melting at least the surface of the thread, whereby adjacent thread layers then adhere to one another. A certain thread layer has a certain diameter or is assigned to a certain spool diameter, and an adjacent thread layer has a slightly smaller or larger diameter or is assigned to a slightly smaller or larger spool diameter. Such bonding can also be carried out in such a way that the thread then breaks during further processing due to this bonding, since the thread can then no longer be pulled off the spool. This prevents the waste thread from being processed further. Furthermore, such bonding can also be easily detected with the help of sensors or manually.

Preferably, during rotation of the core at the application speed, the feeler roller is operated with an increased contact pressure on the spool compared to the operation of the feeler roller in the winding phase.

Due to the excessive contact pressure, the spool has a particularly high hardness. Such high hardness makes it difficult to unwind the spool during further processing and is therefore easily detected during further processing, e.g. by detecting a higher force required to pull the thread off. It is conceivable that the thread breaks during further processing due to the preferably sudden change in the hardness of the spool during unwinding. Furthermore, such excessive contact pressure can be easily combined with the operation of the sensing roller with a different surface speed compared to the spool. The bonding of thread layers is at least supported by means of excessive contact pressure.

In step e), according to an advantageous embodiment of the method, a binding bead of the thread is wound on the spool in an area that is subsequently to be wound over with the thread.

Such a binding bead is wound at a specific axial position on the spool or in a specific small axial area of the spool. When winding and therefore also when unwinding the binding bead, the thread does not oscillate or only oscillates very slightly. This makes handling the thread easier, particularly when unwinding, whereby the thread is cut off and/or knotted with a thread from another, new spool, for example to prevent the waste thread from being sent to further processing. The knotting then enables a continuous further processing process to be achieved. It is also conceivable that when unwinding the binding bead, several layers of thread are unwound at the same time, which is very easy to see visually due to the formation of a ball. Several layers of thread pulled off at the same time could still get caught on thread guides in the further processing, thus preventing the waste thread from being processed into the product manufactured in the further processing.

Further preferably, within the scope of step e), a change in the thread tension of the thread, which is generated in particular by means of the stretching device, takes place.

Such a change in thread tension can also be easily detected during further processing, e.g. using a corresponding sensor. Furthermore, the change in thread tension could lead to the thread becoming brittle and thus to the thread breaking when the spool is unwound during further processing shortly before it reaches the waste thread.

According to a further advantageous embodiment of the method, in step e) a generation of tangled knots of the thread is started, which is at least temporarily suspended immediately beforehand.

The area in which the thread has no tangled knots can be detected optically during further processing, e.g. by a sensor or a worker. Without tangled knots, the thread has a lighter color in particular. In the area in which the thread has no tangled knots, the thread continues to puff up during unwinding, i.e. there is insufficient thread closure and the individual filaments of the thread have an increased distance from one another. No tangled knots can be created, for example, by deactivating the tangling device. It is also conceivable that a preparation device arranged upstream of the tangling device in the thread path is operated in such a way that the thread is no longer sufficiently wetted with preparation fluid and thus the creation of tangled knots is avoided. To achieve this, a preparation pump of the preparation device could be operated at a reduced speed.

It may be advantageous if, within the scope of step e), a short-term reduction in the spinning pump speed of a spinning pump of the melt spinning mill takes place in order to create a predetermined breaking point in the thread.

During unwinding in further processing, such a predetermined breaking point in the thread causes the thread to break shortly before it reaches the waste thread. By reducing the spinning pump speed, the diameter of the thread and thus also its tensile strength is reduced.

Preferably, a spool diameter associated with the achievement of the winding speed is preferably stored in a computer.

This means that in further processing it is known at which spool diameter the useful thread ends. This makes it easier to plan spool changes in further processing, so that disruptions can be avoided and the quality of the end products can be improved. In further processing, so-called running times of a spool travel are used. Each spool is thus assigned a time which is required to unwind the thread from this spool at a certain speed. The total running time of the spool is then made up of a period of unwinding the useful thread, e.g. 6000s, and a subsequent Area of unwinding of waste thread e.g. 100s together.

According to a further embodiment of the method, the sleeve has a specific color.

In particular, such a specific color differs from the colors of the tubes which are not used during the start of the melt spinning, stretching and winding process but which are used after a regular bobbin change during operation of the melt spinning, stretching and winding machine and onto which no waste thread is wound at the feed speed. In particular, it is then easy to recognize from the color of the tube whether the bobbin wound on it has a waste area with waste thread or not.

Advantageously, the thread is dyed during step d), in particular during steps c) and d), in particular during steps b) to d), in particular during steps a) to d).

In this way, the waste thread itself or a transition between the waste thread and the useful thread can be identified by the thread color. This colored thread and thus the presence of the waste area can then be recognized on the front side of a fully wound bobbin and the bobbin can be treated accordingly in further processing based on the corresponding information that this bobbin was partially created during the start of the melt spinning, stretching and winding process.

In summary, such a process is suitable for a wide range of applications, such as the production of fully drawn threads for textile or technical applications, namely the production of FDY (fully drawn yarn) or IDY (industrial yarn). The process could also be used to produce partially drawn threads, namely the production of POY (pre-oriented yarn).

• 1 zeigt schematisch eine erste Ausführungsform einer Schmelzspinn-, Streck- und Aufwickelmaschine in einer Seitenansicht während einer Aufwickelphase.
• 2 zeigt schematisch eine zweite Ausführungsform der Schmelzspinn-, Streck- und Aufwickelmaschine in einer Seitenansicht während der Aufwickelphase.
• 3a zeigt schematisch eine dritte Ausführungsform der Schmelzspinn-, Streck- und Aufwickelmaschine in einer Seitenansicht während des Startens eines Schmelzspinn-, Streck- und Aufwickelprozesses.
• 3b zeigt schematisch die dritte Ausführungsform der Schmelzspinn-, Streck- und Aufwickelmaschine in einer Seitenansicht während des Startens des Schmelzspinn-, Streck- und Aufwickelprozesses mit im Vergleich zu 3a zu einem späteren Zeitpunkt.
• 3c zeigt schematisch die dritte Ausführungsform der Schmelzspinn-, Streck- und Aufwickelmaschine in einer Seitenansicht während des Startens des Schmelzspinn-, Streck- und Aufwickelprozesses mit im Vergleich zu 3b zu einem späteren Zeitpunkt.
• 3d zeigt schematisch die dritte Ausführungsform der Schmelzspinn-, Streck- und Aufwickelmaschine in einer Seitenansicht während der Aufwickelphase.

In the following, preferred embodiments are presented in more detail with reference to the accompanying figures.

• 1 shows schematically a first embodiment of a melt spinning, stretching and winding machine in a side view during a winding phase.
• 2 shows schematically a second embodiment of the melt spinning, stretching and winding machine in a side view during the winding phase.
• 3a shows schematically a third embodiment of the melt spinning, stretching and winding machine in a side view during the start of a melt spinning, stretching and winding process.
• 3b shows schematically the third embodiment of the melt spinning, stretching and winding machine in a side view during the start of the melt spinning, stretching and winding process with in comparison to 3a at a later time.
• 3c shows schematically the third embodiment of the melt spinning, stretching and winding machine in a side view during the start of the melt spinning, stretching and winding process with in comparison to 3b at a later time.
• 3d shows schematically the third embodiment of the melt spinning, stretching and winding machine in a side view during the winding phase.

The procedure for starting a melt spinning, stretching and winding process is described using the 1 to 3d explained. 1 , 2 and 3d each show a different embodiment of a melt spinning, stretching and winding machine by means of which the method can be carried out during a winding phase, i.e. in particular after the method for starting the melt spinning, stretching and winding process. The 3a to 3c show a third embodiment of the melt spinning, stretching and winding machine at different times of the process for starting the melt spinning, stretching and winding process.

1. a) Aufnehmen des Faden 1 aus einer Schmelzspinnerei 2 vorzugsweise mittels einer Fadenpistole 3,
2. b) Anlegen des Fadens 1 an eine Streckeinrichtung 4 mit vorzugsweise zumindest einer Galette 4.1 bis 4.9,
3. c) Anlegen des Fadens 1 an eine Hülse 5, um nachfolgend den Faden 1 auf der Hülse 5 zu einer Spule 6 aufzuwickeln, wobei die Hülse 5 während des Anlegens mittels einer Aufwickelmaschine 7 mit einer Anlegeschwindigkeit rotiert wird,
4. d) Beschleunigung der Hülse 5 von der Anlegeschwindigkeit auf eine Aufwickelgeschwindigkeit,
5. e) Ändern zumindest eines Parameters der Schmelzspinnerei 2, der Streckeinrichtung 4 und/oder der Aufwickelmaschine 7, um durch eine korrespondiere Änderung der Faden- und/oder Spuleneigenschaft den Beginn einer Aufwickelphase zu kennzeichnen.

The method for starting a melt spinning, stretching and winding process of at least one thread 1 comprises the following steps, which are preferably carried out in the order given:

1. a) picking up the yarn 1 from a melt spinning mill 2 preferably by means of a yarn gun 3,
2. b) applying the thread 1 to a stretching device 4 with preferably at least one godet 4.1 to 4.9,
3. c) applying the thread 1 to a sleeve 5 in order to subsequently wind the thread 1 onto the sleeve 5 to form a spool 6, the sleeve 5 being rotated at a winding speed during the application by means of a winding machine 7,
4. d) Acceleration of the core 5 from the starting speed to a winding speed,
5. e) Changing at least one parameter of the melt spinning mill 2, the drawing device 4 and/or the winding machine 7 in order to indicate the beginning of a winding phase by a corresponding change in the thread and/or bobbin properties.

In 1 a first embodiment of the melt spinning, stretching and winding machine for a single thread 1 is shown, whereas the second embodiment of 2 for five threads 1 and the third embodiment of 3a to d are designed for four threads 1. Of course, it is also conceivable that the melt spinning, stretching and winding machine is designed to process two, three or more than five threads 1 in parallel. The first embodiment of the melt spinning, stretching and winding machine has a stretching device 4 with a total of nine godets 4.1 to 4.9 and is thus designed in particular for the production of fully stretched threads 1, e.g. so-called FDY. The second embodiment of the melt spinning, stretching and winding machine is also designed in particular for the production of fully stretched threads 1, e.g. so-called FDY, and for this purpose has a stretching device 4 with a total of six godets 4.1 to 4.6. The third embodiment of the melt spinning, stretching and winding machine has a stretching device 4 with a total of two godets 4.1 and 4.2 and is thus designed in particular for the production of partially stretched threads 1, namely so-called POY.

3a shows the melt spinning, stretching and winding machine after the thread 1 has been taken up from the melt spinning unit 2 by means of the thread gun 3, namely between steps a) and b). Since four threads 1 are spun out according to the third embodiment, these four threads 1 in particular are also taken up by means of the suction gun and guided during the laying. The totality of all threads 1 spun out by means of a melt spinning unit 2 is also referred to as a thread group.

3b shows the melt spinning, stretching and winding machine after the threads 1 have been applied to the stretching device 4 with the two godets 4.1, 4.2, namely between steps b) and c).

3c shows the melt spinning, stretching and winding machine after the threads 1 have been applied to the tubes 5, namely after step c) and in particular during step e).

In the following, various possibilities are described for changing a parameter of the melt spinning mill 2, the stretching device 4 and/or the winding machine 7 within the scope of step e). These different possibilities can be used either separately or in different combinations with one another.

In step e), in particular, a preferably sudden change in the traversing frequency of a traversing device 8 of the winding machine 7 takes place.

One could also say that the parameter changed in step e) is the traversing frequency. The change in the traversing frequency leads in particular to a change in the coil properties.

In step e), the change in the traversing frequency leads in particular to a change in a crossing ratio within the framework of a step precision winding or another mirror disturbance process.

On the other hand, it would also be conceivable that the traversing frequency is changed in such a way that a mirror, which is often also referred to as image winding, is wound in a targeted manner. Such a mirror is then used to mark the start of the winding phase. As the bobbin diameter increases, a mirror is always created when one or more complete bobbin revolutions take place per double stroke of the traversing device 8, i.e. when the ratio of the speed of the bobbin 6 to the double stroke frequency of the traversing device 8 is equal to 1, a multiple or a fraction. A double stroke is defined as a complete back and forth movement of a traversing thread guide of the traversing device 8. In the so-called mirror formation, two thread sections of the thread 1 are laid on top of each other at the same location at different times, so that a large contact surface is created between these two thread sections, which makes it difficult to unwind the bobbin 6 in a further processing process, so that the thread 1 may even break at this point.

In step e), in particular, a rotational speed of a feeler roller 9 of the winding machine 7 that contacts a surface of the coil 6 is set such that a surface speed of the feeler roller 9 essentially corresponds to a surface speed of the coil 6. The feeler roller 9 is previously operated such that the surface speed of the feeler roller 9 is smaller or larger than the surface speed of the coil 6.

One could also say that the parameter changed in step e) is then the surface speed of the scanning roller 9.

By operating the feeler roller 9 with a lower or higher surface speed compared to the spool 6, thermal bonding of thread layers of the spool 6 occurs.

The thermal bonding of thread layers of the coil 6 represents in particular a change in the coil properties.

During the rotation of the sleeve 5 at the feed speed, the feeler roller 9 is operated in particular with excessive contact pressure on the spool 6 compared to the operation of the feeler roller 9 in the winding phase.

One could also say that the parameter changed in step e) is the contact pressure. The change in the contact pressure leads in particular to a change in the coil properties, in particular a change in the hardness of the coil 6.

In step e), in particular, a binding bead 10 of the thread 1 is wound on the spool 6 in an area to be subsequently wound over with the thread 1. 3c shows the melt spinning, stretching and winding machine during the formation of this binding bead 10. The traversing thread guide of the traversing device 8 is held in a certain position so that during the winding of the binding bead 10 there is essentially no traversing and the thread 1 is thus wound up in a certain position with respect to the longitudinal direction of the associated bobbin 6. In the 3c Therefore, in comparison to the other figures, no traversing triangle is shown above the traversing device 8, but only a single thread path.

In step e), a change in the thread tension of the thread 1, which is generated in particular by means of the stretching device 4, takes place.

One could also say that the parameter changed in step e) is the thread tension. The change in the thread tension leads in particular to a change in the thread properties. An increased thread tension leads to a greater stretching of the thread 1 and a stronger corresponding alignment of the molecular chains in the plastic forming the thread 1.

In step e), in particular, a generation of tangle knots of the thread 1 is started, which is at least temporarily suspended immediately beforehand.

One could also say that the parameter changed in step e) is then a tangle knot generation rate. Such a tangle knot generation rate has a value of zero when the generation of tangle knots is suspended. The change in the tangle knot generation rate leads in particular to a change in the thread properties.

In step e), in particular, a short-term reduction in the spinning pump speed of a spinning pump 11 of the melt spinning mill 2 takes place in order to create a predetermined breaking point in the thread 1.

One could also say that the parameter changed in step e) is the spinning pump speed. The change in the spinning pump speed leads in particular to a change in the thread properties, namely in particular to a reduced thread diameter.

A spool diameter associated with reaching the winding speed is preferably stored in a computer 12.

For this purpose, the winding machine 7 is connected to the computer 12, which is indicated by a solid line in the 1 to 3d The computer 12 preferably also serves to control and/or regulate the winding machine, such as for example the control and/or regulation of the traversing frequency, the speed of the tubes 5 and/or the contact pressure of the sensing roller 9.

In the following, the different designs of the melt spinning, stretching and winding machine are described using 1 , 2 and 3d . described in detail. Each melt spinning unit 2 comprises a spinning beam which carries at least one spinneret on its underside. The spinnerets are coupled to a spinning pump 11 which is preferably designed as a multiple pump and generates a separate melt stream for each spinneret. In the case of the first embodiment with only one thread according to 1 a single pump is sufficient. The spinning pump 11 is connected via a melt inlet to a melt source (not shown here in detail), for example an extruder. The spinning pump 11 is connected to the computer 12 for its control and/or regulation, which is shown by a solid line in the 1 to 3d is symbolized.

A cooling device is arranged below the melt spinning plant 2. According to the first In the first embodiment, the cooling device is designed as a drop shaft. According to the second and third embodiments, the cooling device has a cooling shaft which is formed within a blowing chamber, with a drop shaft being arranged downstream of the cooling shaft in the direction of thread travel.

Below the melt spinning unit 2, in particular below the chute, a collecting device is provided which has at least one collecting thread guide 2.s in order to combine the filaments extruded per spinneret into a thread 1.

The threads 1 are drawn off from the melt spinning mill 2 by the stretching device 4 and fed to the winding machine 7. The stretching device 4 is connected to the computer 12 for its control and/or regulation, which is indicated by a solid line in the 1 to 3d is symbolized.

A preparation device 13 is provided, by which the thread 1 is wetted. According to the first embodiment of 1 a preparation device 13 for a thread 1 is arranged between the seventh godet 4.7 and the eighth godet 4.8. According to the second and third embodiment of 2 and 3d a preparation device 13 for several threads 1 is arranged in the area of the collecting thread guide 2.s. The preparation device 13 could be designed, for example, as a preparation pin or as a preparation roller. Furthermore, the use of more than one preparation device 13 in the thread path is also conceivable.

All three embodiments of the melt spinning, stretching and winding machine each have an interlacing device 14, which is arranged between the penultimate and the last godet before the winding machine 7. By means of the interlacing device 14, the tangled knots in the thread 1 can be produced, preferably with the aid of compressed air.

The winding machine 7 has one winding station for each thread 1 of the thread group. Each of the winding stations is assigned a deflection roller 15, in particular for dividing and separating the thread group but also for enabling a defined, subsequent traversing.

The winding machine 7 has a turret 16, by means of which a first winding spindle 17.1 and a second winding spindle 17.2 can be guided alternately into a winding area and a changeover area. The winding points extend along the first or second winding spindle 17.1 or 17.2 located in the winding area. The winding spindles 17.1, 17.2 are held in a cantilevered manner on the turret 16.

For winding and laying the threads 1 onto the bobbins 6, each winding station has a traversing device 8. The feeler roller 9 is arranged parallel to the winding spindles 17.1, 17.2 and rests against the surface of the bobbins 6 when the threads 1 are wound up.

The above-described setting of the surface speed of the feeler roller 9 is preferably carried out using specifications stored in the computer 12. The beginning of the winding phase is identified by setting the surface speed of the feeler roller 9 by operating the feeler roller 9 with a lower or higher surface speed than the spool 6 and then adjusting the surface speeds after the winding speed of the tube has been reached. Appropriate queries are preferably carried out in the computer 12 and it is also ensured, in particular by means of the computer 12, that a thread 1 of the desired quality is produced before the surface speeds of the spool 6 and the feeler roller 9 are adjusted.

The above-described operation of the sensing roller 9 with excessive contact pressure is also preferably carried out by means of specifications stored in the computer 12. The transition to the winding phase is then set to a specific value necessary for producing the coil 6 with the desired properties by changing the contact pressure initiated by the computer 12.

The above-described suspension of the generation of tangle knots is implemented either by suspending the operation of the swirling device 14, preferably by means of the computer 12 and/or by applying too little preparation fluid to the thread 1 by means of the preparation device 13. The preparation device 13 is also preferably controlled and/or regulated by means of the computer 12.

The above-described short-term reduction in the spinning pump speed is also preferably implemented by means of the computer 12.

The tube 5 has, for example, a specific colour. Common tubes 5 are made of cardboard and have a grey colour. To indicate that waste thread is also wound on a specific tube 5, a tube 5 is used to carry out the method for starting the melt spinning, stretching and winding process, which at least partially has a different colour than the grey color. For example, in further processing, the color of the tube 5 can be used to determine whether the spool 6 wound on it partially contains waste thread or not.

During step d), in particular during steps c) and d), in particular during steps b) to d), in particular during steps a) to d), the thread 1 is in particular dyed. The dyeing could, for example, be carried out using an additional dye application device. It is also conceivable that a fluid applied by means of the preparation device 13 is or will be dyed in order to dye the thread 1. It is also conceivable that the dye is introduced in liquid form into the molten plastic in the area of the spinning pump 11, e.g. in the flow path shortly before or shortly after the spinning pump 11.

The thread gun 3 is to be positioned during the application 3a by means of a robot 12 preferably automated by means of the computer 12 or according to 3b can be operated by one worker 19. As in 3c and 3d As shown, the thread gun 3 can be held in a holder adjacent to the thread path of the threads 1 after the threads 1 have been applied.

List of reference symbols

1

thread

2

Melt spinning mill

2.s

Collecting thread guide

3

Thread gun

4

Stretching device

4.1

first galette

4.2

second galette

4.3

third galette

4.4

fourth galette

4.5

fifth galette

4.6

sixth galette

4.7

seventh galette

4.8

eighth galette

4.9

ninth galette

5

Sleeve

6

Kitchen sink

7

Rewinding machine

8th

Traversing device

9

Touch roller

10

binding bead

11

Spinning pump

12

computer

13

Preparation facility

14

Turbulence device

15

Deflection pulley

16

revolver

17.1

first winding spindle

17.2

second winding spindle

18

robot

19

Worker

QUOTES INCLUDED IN THE DESCRIPTION

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Cited patent literature

• DE 102017001090 A1 [0004]

Claims (13)

Method for starting a melt spinning, stretching and winding process of at least one thread (1) with the following steps, which are preferably carried out in the order given: a) taking up the thread (1) from a melt spinning mill (2), preferably by means of a thread gun (3), b) applying the thread (1) to a stretching device (4) with preferably at least one godet (4.1 to 4.9), c) applying the thread (1) to a sleeve (5) in order to subsequently wind the thread (1) on the sleeve (5) to form a bobbin (6), wherein the sleeve (5) is rotated at a starting speed by means of a winding machine (7) during the application, d) accelerating the sleeve (5) from the starting speed to a winding speed, e) changing at least one parameter of the melt spinning mill (2), the stretching device (4) and/or the winding machine (7) in order to indicate the start of a winding phase. Procedure according to Claim 1 , characterized in that in step e) a preferably sudden change in a traversing frequency of a traversing device (8) of the winding machine (7) takes place. Procedure according to Claim 2 , characterized in that in step e) the change in the traversing frequency leads to a change in a crossing ratio in the context of a step precision winding or another mirror disturbance method. Method according to one of the preceding claims, characterized in that in step e) a rotational speed of a feeler roller (9) of the winding machine (7) contacting a surface of the coil (6) is set such that a surface speed of the feeler roller (9) substantially corresponds to a surface speed of the coil (6), wherein the feeler roller (9) is previously operated such that the surface speed of the feeler roller (9) is less than or greater than the surface speed of the coil (6). Procedure according to Claim 4 , characterized in that the operation of the sensing roller (9) with a lower or higher surface speed compared to the spool (6) results in thermal bonding of thread layers of the spool (6). Method according to one of the preceding claims, characterized in that during the rotation of the sleeve (5) at the feed speed, the feeler roller (9) is operated with an increased contact pressure on the spool (6) compared to the operation of the feeler roller (9) in the winding phase. Method according to one of the preceding claims, characterized in that in step e) a binding bead (10) of the thread (1) is wound on the spool (6) in an area to be subsequently wound over with the thread (1). Method according to one of the preceding claims, characterized in that in step e) a change in a thread tension of the thread (1) generated in particular by means of the stretching device (4) takes place. Method according to one of the preceding claims, characterized in that in step e) a generation of tangled knots of the thread (1) is started, which is at least temporarily suspended immediately beforehand. Method according to one of the preceding claims, characterized in that in step e) a short-term reduction in a spinning pump speed of a spinning pump (11) of the melt spinning mill (2) takes place in order to produce a predetermined breaking point in the thread (1). Method according to one of the preceding claims, characterized in that a spool diameter associated with the reaching of the winding speed is preferably stored in a computer (12). Method according to one of the preceding claims, characterized in that the sleeve (5) has a specific color. Method according to one of the preceding claims, characterized in that during step d), in particular during steps c) and d), in particular during steps b) to d), in particular during steps a) to d), the thread (1) is dyed.

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