Method and corresponding device for starting a melt spinning, drawing and winding process
By controlling the flow rate of the upper oil and the changes in the unit state during the start-up stages of melt spinning, stretching, and winding processes, the problem of yarn breakage was solved, achieving resource conservation and efficient production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- OERLIKON TEXTILE GMBH & CO KG
- Filing Date
- 2025-12-18
- Publication Date
- 2026-06-23
AI Technical Summary
During the start-up of melt spinning, stretching, and winding processes, yarns are prone to breakage, leading to increased resource consumption and energy waste.
By temporarily withholding or supplying oil at an initial flow rate greater than the production flow rate during startup, and then gradually adjusting to the production flow rate after application, combined with open-loop and closed-loop control devices, the state changes of the oil supply device and other units are coordinated, reducing the risk of oil breakage.
It effectively reduces the risk of yarn breakage, lowers resource consumption, and improves the success rate and efficiency of the process.
Smart Images
Figure CN122257129A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a method for initiating a melt spinning, stretching and winding process, and a melt spinning, stretching and winding apparatus for performing this method on at least one synthetic yarn. Background Technology
[0002] This melt spinning, stretching, and winding apparatus includes a spinneret nozzle, a first oiling device, a stretching device, a second oiling device, and a winding machine, arranged in series to form a yarn path. In the melt spinning, stretching, and winding process, i.e., during yarn production, the yarn is extruded from the spinneret nozzle, then wetted with a first oiling solution at a production flow rate by means of the first oiling device, then stretched by means of the stretching device, then wetted with a second oiling solution at a production flow rate by means of the second oiling device, and finally wound by means of the winding machine. Stretching preferably involves multiple guide spools, at least some of which are temperature-controlled. The yarn is preferably wound into a package on a bobbin rotating through the winding machine.
[0003] Before yarn production can be achieved, or before the melt spinning, stretching, and winding processes can be performed, a method for initiating the melt spinning, stretching, and winding processes must be executed. In this method for initiating the melt spinning, stretching, and winding processes, yarn extruded from the spinneret nozzles is applied to a first oiling device, a stretching device, a second oiling device, and a winding machine. Freshly extruded yarn, just exiting the spinneret nozzles, is applied to the units. The yarn has multiple filaments, wherein the filaments are individually extruded from the spinneret nozzles, but the filaments are applied together as a single yarn, for example, by means of a suction gun.
[0004] In this method for initiating the melt spinning, stretching, and winding process, there is a risk that, depending on its nature, the yarn will break and it will be impossible to successfully complete the process, thus requiring a restart. This leads to increased resource consumption, particularly increased consumption of materials for the yarn, energy required to operate the melt spinning, stretching, and winding unit, and the first and second oiling solutions. Summary of the Invention
[0005] Therefore, the basic objective of this invention is to provide a method for initiating a melt spinning, stretching, and winding process, as well as a melt spinning, stretching, and winding apparatus, which reduces or eliminates problems in the prior art, particularly aiming to reduce the risk of yarn breakage and / or resource consumption in the method for initiating the melt spinning, stretching, and winding process.
[0006] This objective is achieved primarily through methods used to initiate melt spinning, stretching, and winding processes.
[0007] More precisely, the objective is achieved by a method for initiating a melt spinning, stretching, and winding process for at least one synthetic yarn, wherein the yarn extruded from a spinneret nozzle is applied to a first oiling device, a stretching device, a second oiling device, and a winding machine, wherein during application, oil is not supplied by means of the first oiling device and / or the second oiling device, and / or during application, oil is supplied by means of the first oiling device and / or the second oiling device at a predetermined initial flow rate, wherein the initial flow rate is greater than the production flow rate, wherein the production flow rate is in preparation for subsequent yarn production, wherein after application, the initial flow rate of the oil in each oiling device is set to the production flow rate.
[0008] Therefore, the risk of yarn breakage in the methods used to initiate melt spinning, stretching, and winding processes is reduced. Furthermore, resource consumption in the methods used to initiate melt spinning, stretching, and winding processes is reduced simply because fewer yarn breaks occur. Specifically, oil consumption can also be reduced if oil is not supplied during application using the first and / or second oiling devices. After application, the flow rate of the oil changes from an initial flow rate to a production flow rate. Other units also operate specifically in the initial state for application and change to a production state after application. In particular, the change of state of each unit to the production state and the change of flow rate at the two oiling devices are time-matched, specifically with regard to avoiding yarn breakage and / or yarn fracture. For example, the rotational speed of the guide disc can be changed to the production state or production flow rate simultaneously with the flow rate at one of the oiling devices. On the other hand, it is also conceivable to change the rotational speed of the guide disc and the flow rate at one of the oiling devices at least partially continuously, for example, where the flow rate at one of the oiling devices is changed first or the rotational speed of the guide disc is changed first.
[0009] According to one embodiment of the method, during application, the first top oil is not supplied, and during application, the initial flow rate of the second top oil is greater than the production flow rate.
[0010] According to an alternative embodiment of the method, during application, no second top oil is supplied, and during application, the initial flow rate of the first top oil is greater than the production flow rate.
[0011] According to another alternative embodiment of the method, the first and second oiling fluids are not supplied during application.
[0012] According to another alternative embodiment of the method, the initial flow rates of the first and second top oils during application are greater than the associated production flow rates.
[0013] Whether oil is not supplied at the corresponding oiling device during application, or whether the corresponding initial flow rate of the oil during application is greater than the associated production flow rate, is determined while taking into account the state of all units of the melt spinning, stretching and winding devices during application and subsequent production, especially with the premise of minimizing the risk of breakage.
[0014] According to another embodiment of the method, the production flow rates of the first and second top oiling solutions are set within a planned time period Δt. The rate of change of the flow rates of the first and / or second top oiling solutions... Corresponding to the corresponding production flow rate Q tP Subtract the associated initial flow rate Q tA The difference is divided by the quotient for that time period. Therefore, the rate of change... With the help of formula calculate.
[0015] In this way, the risk of decapitation can be further reduced. When the flow rate changes from the initial flow rate Q... tA Change to production flow rate Q tP At that time, a linear increase or decrease was achieved. The increase or decrease could also occur with a varying gradient. In particular, the flow rate distribution during the time period Δt did not exhibit any instability.
[0016] The production flow rates of the first and second oiling fluids are preferably set by specifying an intermediate value between the initial flow rate and the production flow rate.
[0017] In this way, the risk of yarn breakage can be further reduced, especially in certain production states that the melt spinning, stretching, and winding units need to achieve. The flow rate is changed by specifying intermediate values in stages. The flow rate is only further changed after the corresponding intermediate value has been reached and maintained for a certain period. The production flow rate is then specified as the final value. With the help of such intermediate values, the timing coordination of flow rate changes with changes in the state of other units becomes easier and more flexible. Specifically, between intermediate values, there are linear changes in flow rate or changes in flow rate with a changing gradient.
[0018] As a further preferred embodiment, the corresponding oil is supplied by a pump from the first and / or second oiling device. The pump has a speed of 0.03 to 0.14 cm per revolution. 3 The capacity, especially at 0.05 to 0.12 cm per revolution. 3 The pump operates at speeds of 0 to 72 revolutions per minute (inclusive), particularly at speeds of 0 to 66 revolutions per minute (inclusive). With the aid of this pump, the flow rates required for conventional melt spinning, drawing, and winding processes can be achieved.
[0019] The pump speed is advantageously set automatically by means of open-loop and / or closed-loop control devices. For this purpose, the following parameters are stored in the open-loop and / or closed-loop control devices: pump parameters associated with the initial flow rate, the absence of oil supply, and / or the production flow rate.
[0020] This allows for a simple and rapid transition between the initial flow rate and the production flow rate. Specifically, the corresponding target speed of the pump is stored in the open-loop and / or closed-loop control unit. The automatic setting of the speed then involves the control of the pump's driver, such as the control of an electric motor, which is subsequently supplied with current based on the target speed using a control algorithm also stored in the open-loop and / or closed-loop control unit.
[0021] According to one embodiment of the method, the yarn is wetted with a first oiling liquid containing undiluted oil by means of a first oiling device.
[0022] According to one embodiment of the method, the yarn is wetted with a second oiling liquid containing an oil-water emulsion by means of a second oiling device, wherein the oil-water emulsion has a water content of 0-50%.
[0023] If, in this particular combination of supplying undiluted oil via a first oiling device and supplying an oil-water emulsion with a water content of 0-50% via a second oiling device, the associated production flow rate has already been supplied to the yarn during application, there is an increased risk of yarn breakage. Especially for this combination of oiling solutions, a significant reduction in the risk of yarn breakage can therefore be achieved by means of the method according to the invention.
[0024] The objective of this invention is also achieved through a melt spinning, stretching, and winding apparatus for at least one synthetic yarn.
[0025] More precisely, this objective is then achieved by a melt spinning, stretching, and winding apparatus for at least one synthetic yarn to perform the above-described method, wherein a spinneret nozzle, a first oiling device, a stretching device, a second oiling device, and a winding machine are arranged in series to form a yarn path.
[0026] Melt spinning, stretching, and winding equipment is specifically designed for producing fully stretched synthetic yarns, known as fully stretched yarns (FDY), particularly for textile applications. However, melt spinning, stretching, and winding equipment can also be used to produce fully stretched synthetic yarns for industrial applications, namely industrial yarns (IDY). It is also possible to use melt spinning, stretching, and winding equipment to produce pre-stretched yarns, known as "pre-oriented yarns" (POY), or highly oriented yarns, known as "highly oriented yarns" (HOY). By employing methods for initiating the melt spinning, stretching, and winding process, which will subsequently be executed through the melt spinning, stretching, and winding equipment, yarn breaks during startup can be successfully avoided, especially for the aforementioned yarn types. Attached Figure Description
[0027] The preferred embodiments will now be explained in more detail with reference to the accompanying drawings.
[0028] Figure 1 An embodiment of a melt spinning, stretching, and winding apparatus for at least one synthetic yarn to perform a method for initiating a melt spinning, stretching, and winding process is shown schematically in a side view.
[0029] List of reference numerals
[0030] 1. Melt spinning, stretching and winding apparatus
[0031] 2. Yarn
[0032] 3. Spinneret Nozzle
[0033] 4.1 First oiling device
[0034] 4.2 Second oiling device
[0035] 5. Tensioning device
[0036] 5.1 The first guide wire disc of the tensioning device 5
[0037] 5.2 The second guide wire disc of the stretching device 5
[0038] 5.3 The third guide wire disc of the stretching device 5
[0039] 5.4 The fourth guide wire disc of the stretching device 5
[0040] 5.5 The fifth guide wire disc of the tensioning device 5
[0041] 5.6 The sixth guide wire disc of the tensioning device 5
[0042] 6 Winding machine
[0043] 6.1 The first deflection roller of the winding machine 6
[0044] 6.2 The second deflection roller of the winding machine 6
[0045] 7.1 First Pump
[0046] 7.2 Second Pump
[0047] 8. Open-loop and / or closed-loop control devices
[0048] 9.1 The motor of the first pump (7.1)
[0049] 9.2 The motor of the second pump 7.2
[0050] 10. Cylindrical tubes
[0051] 11 rolls
[0052] Δt time period
[0053] Q tA Initial flow rate
[0054] Q tP Production Flow Rate
[0055] rate of change of flow rate Detailed Implementation
[0056] Figure 1 The melt spinning, stretching, and winding apparatus 1 is shown during production or during the melt spinning, stretching, and winding process, i.e., after the successful execution of the method for initiating the melt spinning, stretching, and winding process.
[0057] The melt spinning, stretching, and winding apparatus 1 for at least one synthetic yarn 2 includes a spinneret nozzle 3, a first oiling device 4.1, a stretching device 5, a second oiling device 4.2, and a winding machine 6, arranged in series to form a yarn path. The first oiling device 4.1 can be supplied with a first oiling solution by means of a first pump 7.1, which is driven by a motor 9.1. The second oiling device 4.2 can be supplied with a second oiling solution by means of a second pump 7.2, which is driven by a motor 9.2. Alternatively, other types of oiling solution supply are also conceivable, such as supplying by gravity from a tank and a corresponding intermediate valve.
[0058] In a method for initiating a melt spinning, stretching, and winding process for at least one synthetic yarn 2, the yarn 2 extruded from the spinneret nozzle 3 is applied to a first oiling device 4.1, a stretching device 5, a second oiling device 4.2, and a winding machine 6.
[0059] During application, the oil is supplied without the aid of the first oiling device 4.1 and / or the second oiling device 4.2, and / or during application, the oil is supplied with the aid of the first oiling device 4.1 and / or the second oiling device 4.2 at a predetermined initial flow rate Q. tA The oil is supplied with an initial flow rate Q. tA Greater than the production flow rate Q tP Production flow rate Q tP This is provided for the production of yarn 2, following the initiation of melt spinning, stretching, and winding processes. After application, the initial flow rate Q of the oil in each oiling device 4.1, 4.2 is... tA Set as production flow rate Q tP .
[0060] The corresponding oil flow rate changes from the initial flow rate Q tA Change to production flow rate Q tP Volumetric flow rate can also be mentioned instead of flow rate.
[0061] The method for initiating melt spinning, stretching, and winding processes specifically includes the following steps:
[0062] - The yarn 2 is picked up from the spinneret nozzle 3, preferably by means of a suction gun.
[0063] - Apply yarn 2 to the first oiling device 4.1, wherein the yarn 2 is subsequently guided to contact the first oiling device 4.1 and / or applied by means of the first oiling device 4.1 at an initial flow rate Q of the first oiling liquid. tA Moisten,
[0064] - The yarn 2 is applied to a stretching device 5 having at least one guide disc 5.1 to 5.6, wherein the guide disc 5.1 to 5.6 rotates at an applied speed.
[0065] - Apply yarn 2 to the second oiling device 4.2, wherein yarn 2 is subsequently guided to contact the second oiling device 4.2 and / or by means of the second oiling device 4.2 at an initial flow rate Q of the second oiling liquid. tA Moisten,
[0066] - Yarn 2 is applied to two deflection rollers 6.1 and 6.2 of the winding machine 6, wherein the deflection rollers 6.1 and 6.2 rotate at the applied speed.
[0067] - Yarn 2 is applied to bobbin 10 so that yarn 2 can subsequently be wound into a package 11 on bobbin 10, wherein bobbin 10 rotates at an application speed by means of a winding machine 6 during application, changing the rotational speed of bobbin 2 from its application speed to the production speed of bobbin 2.
[0068] - Change the rotational speed of deflection rollers 6.1 and 6.2 from their applied speed to their production speed.
[0069] - Change the rotational speed of the guide disc 5.1 to 5.6 from its applied speed to the production speed of the guide disc 5.1 to 5.6, and
[0070] - The flow rate of the corresponding oil at the first oiling device 4.1 and the second oiling device 4.2 is changed from the corresponding initial flow rate Q. tA Or, the supply of oil may be changed to the corresponding production flow rate Q. tP This occurs either before changing the corresponding flow rate, or when oil is not supplied at the corresponding oiling devices 4.1 and 4.2, or when the initial flow rate Q is... tA Greater than the associated production flow rate Q tP .
[0071] For example, during application, the first top dressing is not supplied, and during application, the initial flow rate Q of the second top dressing is... tAFurthermore, it is greater than the production flow rate Q. tP .
[0072] Alternatively, during application, no second upper oil is supplied, and during application, the initial flow rate Q of the first upper oil is maintained. tA Continues to be greater than the production flow rate Q tP .
[0073] Alternatively, the first and second top oils are not supplied during application.
[0074] Alternatively, the initial flow rates Q of the first and second upper oils during application are... tA In every case, it is greater than the associated production flow rate Q. tP .
[0075] It is also conceivable that the first top dressing fluid is not supplied during application, or that the initial flow rate Q of the first top dressing fluid during application is... tA Greater than the associated production flow rate Q tP And the second oil is supplied at any desired initial flow rate Q. tA supply.
[0076] It is also conceivable that no second top oil is supplied during application, or that the initial flow rate Q of the second top oil during application is... tA Greater than the associated production flow rate Q tP And the first oil is applied at any desired initial flow rate Q. tA supply.
[0077] The production flow rates Q of the first and second oiling fluids tP The setting occurs within a planned time period Δt. The rate of change of the flow rate of the first and / or second upper oil fluid. Corresponding to the corresponding production flow rate Q tP Subtract the associated initial flow rate Q tA The difference divided by the time period Δt. Rate of change. With the help of formula calculate.
[0078] rate of change Subsequently, it remains constant over the time interval Δt. In other words, the flow rates of the first and second upper oil layers change from the initial flow rate Q. tA Towards production flow rate Q tP The change occurs linearly. However, if it is worthwhile to avoid a break in the chain and / or to reduce the time period Δt, then the rate of change... It can also have a changing value within the time period Δt.
[0079] The production flow rates Q of the first and second oiling fluids tPThe setting can also be achieved by specifying the initial flow rate Q. tA and production flow rate Q tP The intermediate value between these values is used. The graphical representation of the flow rate versus time Δt then has a stepped or stepped shape. If no oil is supplied during application, a gradually increasing intermediate value is specified. If oil is supplied during application at a flow rate greater than the production flow rate Q... tP initial flow rate Q tA For supply, a gradually decreasing intermediate value is specified. Between two intermediate values, the flow rate changes at a constant or varying rate. Change.
[0080] The corresponding oiling fluid is supplied to the first oiling device 4.1 and / or the second oiling device 4.2 by means of pumps 7.1 and 7.2. Pumps 7.1 and 7.2 have a flow rate of 0.03 to 0.14 cm per revolution. 3 The capacity, especially at 0.05 to 0.12 cm per revolution. 3 Pumps 7.1 and 7.2 operate at speeds of 0 to 72 revolutions per minute (inclusive), particularly at speeds of 0 to 66 revolutions per minute (inclusive).
[0081] The corresponding flow rate during the application period, i.e., the initial flow rate Q. tA The corresponding lack of oil supply, or the corresponding absence of oil supply, is automatically set by the open-loop and / or closed-loop control device 8. The corresponding flow rate supplied to the production yarn 2 is the production flow rate Q. tP The changes are automatically executed by the open-loop and / or closed-loop control device 8.
[0082] Here, the speeds of pumps 7.1 and 7.2 are automatically set by means of open-loop and / or closed-loop control device 8. For this purpose, the following parameters are stored in the open-loop and / or closed-loop control device 8, namely, the initial flow rate Q. tA No supply of top oil and / or production flow rate Q tP The parameters of the associated pumps 7.1 and 7.2.
[0083] In the open-loop and / or closed-loop control device 8, many parameters are combined into groups, known as recipes. A recipe, or production recipe, is, for example, a recipe with a production flow rate Q. tP The parameters of the associated pumps 7.1 and 7.2, as well as other parameters for the states of the other units used to achieve the melt spinning, stretching, and winding apparatus 1. Another formulation, for example, has an initial flow rate Q. tA The parameters of the associated pumps 7.1 and 7.2, as well as additional parameters for determining the state of other units of the melt spinning, stretching and winding apparatus 1 at the start of the melt spinning, stretching and winding apparatus 1.
[0084] The parameters used for transitioning from the initial state to the production state can be stored in another formula or can be part of the production formula. This transition occurs after the successful application of yarn 2 up to the winding machine 6, and is triggered, for example, by operator input on the open-loop and / or closed-loop control device 8. Successful application of yarn 2 can also be detected by means of sensors, and thus the transition begins subsequently based on sensor signals, which is particularly advantageous if the application of yarn 2 is performed by means of a robot and / or at least partially automatically. Typically, the application of yarn 2 is performed manually by an operator carrying a suction gun, into which yarn 2 is drawn until it has been applied to the winding machine 6, specifically the bobbin 10, and subsequently cut.
[0085] The yarn 2 is wetted with a first oiling solution containing undiluted oil by means of a first oiling device 4.1. Alternatively, the yarn 2 may also be wetted with a first oiling solution containing an oil-water emulsion of 30%-100% undiluted oil by means of the first oiling device 4.1. The same first oiling solution is supplied by means of the first oiling device 4.1 during application and production.
[0086] The yarn 2 is wetted with a second oiling solution by means of a second oiling device 4.2. The second oiling solution comprises an oil-water emulsion, wherein the oil-water emulsion has a water content of 0-50%. The same second oiling solution is supplied by means of the second oiling device 4.2 during application and production.
[0087] With the help of Figure 1 The melt spinning, stretching, and winding apparatus 1 shown can produce multiple yarns 2 simultaneously; five are shown here as an example. During production, the multiple yarns 2 are extruded from spinneret nozzles 3 adjacent to each other, which are held in a common spinning box. Preferably, each yarn 2 is provided with a first oiling device 4.1. The multiple yarns 2 are guided together as yarn sheets by means of stretching devices 5, particularly their guide discs 5.1 to 5.6. Preferably, each yarn 2 is provided with a second oiling device 4.2, and these are arranged adjacent to each other to form a group of oiling devices. Providing a single second oiling device 4.2 for multiple yarns 2 is also conceivable. Each of the multiple yarns 2 is wound adjacent to each other by means of a winding machine 6 to form a corresponding package 11, wherein multiple bobbins 10, i.e., one bobbin per yarn 2, are held and rotated one after another by means of the winding spindles of the winding machine 6.
[0088] The described method for initiating the melt spinning, stretching, and winding process is then preferably applied to multiple synthetic yarns 2 occurring simultaneously.
Claims
1. A method for initiating a melt spinning, stretching, and winding process for at least one synthetic yarn (2), wherein, The yarn (2) extruded from the spinneret nozzle (3) is applied to the first oiling device (4.1), the stretching device (5), the second oiling device (4.2), and the winding machine (6), wherein either oil is supplied during application without the aid of the first oiling device (4.1) and / or the second oiling device (4.2), and / or oil is supplied during application with the aid of the first oiling device (4.1) and / or the second oiling device (4.2) at a predetermined initial flow rate (Q). tA ) to supply the upper oil, wherein the initial flow rate (Q) tA ) greater than the production flow rate (Q) tP ), wherein the production flow rate (Q) tP ) is provided for the subsequent production of the yarn (2), wherein, after application, the initial flow rate (Q) of the oiling liquid in each oiling device (4.1, 4.2) is tA ) is set as the production flow rate (Q) tP ).
2. The method according to claim 1, characterized in that, During application, the first top dressing is not supplied, and during application, the initial flow rate (Q) of the second top dressing is... tA ) is greater than the production flow rate (Q) tP ).
3. The method according to claim 1, characterized in that, During application, no second top dressing is supplied, and during application, the initial flow rate (Q) of the first top dressing is... tA ) is greater than the production flow rate (Q) tP ).
4. The method according to at least one of the preceding claims, characterized in that, The production flow rate (Q) of the first and second oiling solutions tP The setting occurs within a specific planned time period (Δt), wherein the rate of change of the flow rate of the first and / or the second oiling fluid ( ) corresponds to the corresponding production flow rate (Q) tP Subtract the associated initial flow rate (Q) tA The difference between the time period (Δt) and the quotient of the time period (Δt) is the rate of change. ) Using formula calculate.
5. The method according to at least one of the preceding claims, characterized in that, The production flow rate (Q) of the first and second oiling solutions tP The setting is achieved by specifying the initial flow rate (Q). tA ) and the production flow rate (Q) tP It is accomplished using intermediate values between ) 6. The method according to at least one of the preceding claims, characterized in that, The corresponding oil is supplied to the first oiling device (4.1) and / or the second oiling device (4.2) by means of pumps (7.1, 7.2), wherein the pumps (7.1, 7.2) have a rotational speed of 0.03 to 0.14 cm / s. 3 The capacity, especially at 0.05 to 0.12 cm per revolution. 3 The pumps (7.1, 7.2) operate at a speed of 0 to 72 revolutions per minute (inclusive), particularly at a speed of 0 to 66 revolutions per minute (inclusive).
7. The method according to claim 6, characterized in that, The speed of the pumps (7.1, 7.2) is automatically set by means of an open-loop and / or closed-loop control device (8), wherein, for this purpose, the following parameter is stored in the open-loop and / or closed-loop control device (8), namely, the initial flow rate (Q) tA ), no supply of top oil and / or the aforementioned production flow rate (Q) tP The parameters of the pumps (7.1, 7.2) associated with it.
8. The method according to at least one of the preceding claims, characterized in that, The yarn (2) is wetted with a first oiling liquid by means of the first oiling device (4.1), the first oiling liquid containing undiluted oil.
9. The method according to at least one of the preceding claims, characterized in that, The yarn (2) is wetted with a second oiling liquid by means of the second oiling device (4.2), the second oiling liquid comprising an oil-water emulsion, wherein the oil-water emulsion has a water content of 0-50%.
10. A melt spinning, stretching, and winding apparatus (1) for at least one synthetic yarn (2), for performing the method according to any one of claims 1 to 9, wherein, The spinneret nozzle (3), the first oiling device (4.1), the stretching device (5), the second oiling device (4.2), and the winding machine (6) are arranged in series to form a yarn path.