Method for feeding a synthetic thread

Abstract

The invention relates to a method for feeding a synthetic thread (F1-Fn) from a melt spinning winding device (1), which comprises a melt spinning device (10) which is designed for extruding the synthetic thread (F1-Fn) and a winding device (20), which is designed for winding the synthetic thread (F1-Fn), wherein the thread (F1-Fn) can be fed from the melt spinning device to the winding device (40) by means of a chute (30). The feed can be adjusted by means of a predetermined pressure range (I, II, III) in a suction unit (50) on the winding device (40). The invention also relates to the associated winding device.

Description

[0001] Method for feeding a synthetic thread

[0002] The invention relates to a method for feeding a synthetic yarn from a melt-spinning winder according to the preamble of claim 1 and an associated winder for winding the synthetic yarn from the melt-spinning winder.

[0003] The feeding of the threads from the spinning mill to a winding device via the chute is well known.

[0004] DE102004036640A1 describes a spinning process for producing chemical fibers and a chute for use in such a process, wherein a plurality of synthetic fibers in the form of a filament bundle are produced from a melt by extrusion using a melt spinning device and cooling using a cooling chute. The filament bundle is drawn from the chute at such a high linear velocity that the filament bundle drags cooling air along the chute. In an end section of the chute, which includes the outlet, the cross-section of the chute widens toward the outlet. The cross-sectional shape preferably has a waist.

[0005] After the extrusion process has begun, the majority of synthetic fibers are fed onto a dedicated take-up device. For this purpose, the majority of synthetic fibers are thrown down the cooling chute and the drop chute to the take-up device.

[0006] If the dropping is not carried out accurately enough, the majority of synthetic fibers cannot be caught accurately enough and applied to the winding device, which can lead to an increase in the number of non-windable synthetic fibers and thus to an increase in the amount of waste.

[0007] The object of the invention is therefore to provide a method that enables the safe and cost-effective feeding of a plurality of synthetic fibers via a chute, while avoiding waste. It is also an object of the invention to provide a winding device for winding a synthetic thread, which enables safe and waste-free feeding.

[0008] This object is achieved with regard to the method by a method according to the invention for feeding a synthetic thread from a melt spinning winding device having the features of claim 1.

[0009] According to one aspect of the invention, a method is provided for feeding a synthetic yarn from a melt-spinning winder, which comprises a melt-spinning device configured to extrude the synthetic yarn and a winder configured to wind the synthetic yarn. The yarn can be fed from the melt-spinning device to the winder via a chute. The feeding can be adjusted by means of a predetermined pressure range in a suction device on the winder.

[0010] Advantageous embodiments and further developments of the procedure result from the embodiments listed below.

[0011] A suction device is provided on the winding device, which is activated, for example, when the synthetic thread is applied. The suction device can assist in the targeted feeding of the synthetic thread fed from the chute and falling down, thereby improving the application and feeding of the synthetic thread. The suction device can be used to more precisely position and determine the drop point using a predetermined suction force with a predetermined pressure range.

[0012] In a preferred embodiment of the method, a first pressure range with a predetermined first pressure value is provided in the suction device when the synthetic thread is guided from the melt spinning device to the winding device, - a second pressure range with a predetermined second pressure value is provided in the suction device when the synthetic thread is applied to the winding device and / or

[0013] - a third pressure area with a predetermined third pressure magnitude is provided in the suction device when the synthetic thread is applied to the winding device.

[0014] Providing different pressure areas with predetermined pressure magnitudes in the suction direction based on the position of the yarn in the melt spin winder improves the catching and feeding of the yarn and reduces energy consumption.

[0015] In a further particularly preferred embodiment of the method, the first pressure size has a different amount than the second pressure size and / or third pressure size and / or the first pressure size, the second pressure size and / or the third pressure size are / is set based on the denier, the composition and / or the properties of the synthetic thread.

[0016] Depending on the yarn being produced, the melt used, and the yarn denier, different pressure ranges may be required for optimal yarn feeding. Furthermore, the required pressure also depends on the yarn's position in the melt spinning winder, resulting in different pressure ranges.

[0017] In a particularly preferred embodiment of the method, the first pressure range substantially ranges between 550 and 850 hPa, the second pressure range substantially ranges between 150 and 550 hPa, and / or the third pressure range substantially ranges between 0 and 150 hPa.

[0018] Advantageously, the different pressure zones based on the respective position of the thread can save energy for providing the respective pressure zone. According to a particular embodiment of the method, the regulation and / or control of the pressure zones is / are carried out manually and / or automatically, with the control of the pressure zones being controlled over predetermined time periods. The control of the pressure zones is carried out via sensors by means of which the position of the thread in the melt spinning device and the winding device can be tracked.

[0019] To control the pressure ranges, additional sensors are advantageously provided, which check the control processes based on predetermined data and adjust the pressure ranges accordingly.

[0020] According to another embodiment of the method, the pressure ranges can be set via a control system, wherein the duration of the pressure ranges is carried out over a predetermined period of time, which can be determined by empirical values.

[0021] According to a special embodiment of the process, the control and / or regulation of the printing areas is combined with an automatic, semi-automatic and / or manual application process.

[0022] The control and regulation of the pressure ranges can be applied to automatic, semi-automatic, or manual application processes. An automatic application process involves the application of synthetic threads to the winding device by appropriate robots or application aids, without the need for operator intervention. A semi-automatic application process requires partial operator intervention, sometimes combining manual and automatic application processes. A manual application process involves the complete application of the synthetic thread to the winding device by an operator.

[0023] According to a particularly preferred embodiment of the method, the first pressure range, the second pressure range, and / or the third pressure range are kept constant over time and / or varied over time. The pressure values ​​of the pressure range can be kept constant over a predetermined time. However, it may also be necessary for the pressure value of the respective pressure range to increase and / or decrease over time. This can be achieved by appropriately throttling or controlling the compressed air or the intake air. This has the advantage of saving energy.

[0024] According to a particular embodiment of the method, the cross-section of the drop shaft is narrowed by means of a cross-section narrowing device when the first pressure range is applied and enlarged when the second pressure range is applied.

[0025] The cross-section of the chute is open to the winding device with a predetermined cross-sectional area. For optimal use of the intake air, the cross-sectional area of ​​the chute's outlet opening can be narrowed by means of a cross-sectional constriction device, depending on the prevailing pressure range. A first pressure range is particularly advantageous when a synthetic thread falls into the chute, as it operates at a higher pressure level, allowing for reliable collection of the synthetic thread.

[0026] According to a special design of the process, the following steps are carried out to feed the synthetic thread:

[0027] - Extruding a plurality of filaments from a plastic melt and combining the plurality of filaments to form a synthetic thread,

[0028] - feeding the synthetic thread to an inlet of a chute,

[0029] - Inserting the synthetic thread into the fall shaft,

[0030] - Providing the first pressure range at a suction device,

[0031] - Reducing the cross-sectional area of ​​the outlet of the chute,

[0032] - Collecting the synthetic thread at the suction device,

[0033] - Enlarge the exit mouth of the fall shaft,

[0034] - Providing the second pressure range at the suction device,

[0035] - Attaching the synthetic thread to the winding device,

[0036] - Providing the third pressure area at the suction device. With regard to the winding device, the object is achieved according to the invention with a winding device having the features of claim 10.

[0037] According to one aspect of the invention, a winding device for winding a synthetic thread from a melt spinning device is provided, wherein the winding device is configured to carry out the method according to at least one of the preceding embodiments.

[0038] Advantageous embodiments and further developments of the winding device result from the embodiments listed below.

[0039] According to a particular embodiment of the winding device, a cross-sectional narrowing device is formed on a chute belonging to the winding device at the outlet opening of the chute, wherein the cross-sectional narrowing device has a wing flap which is articulated to the outlet opening of the thread chute and is movable manually and / or by means of an actuator between a cross-sectional narrowing position for narrowing the outlet opening and a cross-sectional enlarging position for releasing the outlet opening.

[0040] The take-up device is assigned a chute for feeding the synthetic thread. The chute has a cross-sectional constriction device at its outlet opening, which allows the suction flow generated by the take-up device's suction device to act more effectively on the chute and the synthetic thread fed therein, thus improving the pressure area there and enabling precise feeding of the synthetic thread to the take-up device.

[0041] In another particularly preferred embodiment of the winding device, the suction device has a first suction opening that can be coupled to a collecting basket, and / or the first suction opening has an acceleration nozzle. The suction device has a first suction opening with which the suction flow can be guided to the chute. To support the suction effect, a collecting basket is provided that can collect the synthetic thread.

[0042] Furthermore, an acceleration nozzle can be provided at the first intake port, which provides improved suction, particularly when applying the thread. The acceleration nozzle increases and improves the suction effect, for example, by means of an adjustable flow cross-section.

[0043] In a preferred embodiment of the winding device, the collecting basket is designed to redirect the air flow of the first intake opening.

[0044] The collecting basket is designed so that at least a portion of the air flow can be directed towards the chute outlet opening so that the synthetic thread can be better guided to the winding device.

[0045] The collecting basket has corresponding deflection plates or deflection surfaces which enable the air flow generated by the intake opening of the suction device to be diverted particularly effectively to the outlet of the air shaft.

[0046] In a further particularly preferred embodiment of the winding device, the suction device has a second suction opening which cooperates with a thread cutting device which is designed to cut the synthetic thread.

[0047] Furthermore, the suction device has a second suction opening, which is arranged on the winding device in the case of a thread cutting device. The thread cutting device has the function of severing the thread and for this purpose has a so-called gathering chopper device which has a blade with which the thread can be cut. Adjacent to the thread cutting device is the second suction opening, by means of which the synthetic thread coming from the spinning device can be sucked away so that the winding device is not contaminated with newly produced synthetic thread that can no longer be wound up. The suction device not only has the function of feeding the synthetic thread, but also of removing the synthetic thread if the thread to be wound up can no longer be wound up in the winding device, for example due to a thread break.At this time, a synthetic thread is further supplied from the spinning device, which is then sucked away in the second suction opening of the suction device when the thread cutting device has been activated.

[0048] The second suction port of the suction device interacts with the thread cutting device, which is activated in the event of a thread break during winding of the threads in the winding device. In the event of a thread break, the thread cutting device cuts the thread, the suction device and the associated second suction port are activated, and the thread extruded from the melt spinning device is sucked away via the second suction port until the winding device has been prepared for a new winding process and the supply of incompletely wound bobbins has been removed from the associated winding spindle or a winding spindle with corresponding empty tubes has been provided in the winding device. This requires the thread to be applied to the winding device again, which must be brought at least from the second suction port to the winding device.

[0049] In a particularly preferred embodiment of the winding device, an air flow diverter can be detachably coupled to the first suction opening of the suction device and / or to the second suction opening of the suction device, which is adjacent to the thread cutting device.

[0050] In a preferred embodiment of the winding device, an air flow diverter is provided, which can be selectively coupled to the first intake port of the suction device and to the second intake port of a thread cutting device. This allows the suction power of the suction device to be used in different positions, on the one hand for better feeding of the synthetic thread and, on the other hand, to assist in cutting the thread, particularly in the event of a thread breakage. In both cases, the sucked-in synthetic thread is collected in a waste collection device (not further explained).

[0051] The air flow diversion can, for example, be a bypass line and / or a corresponding valve flap with which the intake air flow can be fed either to the first intake opening or the second intake opening of the intake device.

[0052] Further advantages and combinations of features emerge from the following description of embodiments of the method and the device.

[0053] The method according to the invention and the winding device according to the invention are explained in more detail below using some embodiments with reference to the attached figures.

[0054] They represent:

[0055] Fig.1 schematically shows a front view of a first embodiment of the device according to the invention,

[0056] Fig. 2 is a schematic view of an outlet mouth of a false eight with a cross-sectional constriction device in a state for narrowing the outlet mouth of the fall shaft,

[0057] Fig. 3 is a schematic view of the outlet opening shown in Fig. 2 with an open cross-sectional constriction device,

[0058] Fig. 4 is a schematic side view of the winding device, the outlet opening with the cross-sectional constriction device open and the suction device in the first pressure area,

[0059] Fig. 5 the devices shown in Fig. 4 with the suction device in the second pressure range,

[0060] Fig. 6 the devices shown in Fig. 4 with the suction device in the third pressure area, wherein the synthetic thread is completely laid out in the winding device,

[0061] Fig. 7 shows a pressure function graph showing the first, second and third pressure variables of the respective first, second and third pressure ranges over time, Fig. 8 shows an embodiment of the pressure function graph showing the first, second and third pressure variables of the respective first, second and third pressure ranges over time, each with different variables, and

[0062] Fig. 9 is a schematic block diagram of the process steps for applying and feeding a synthetic thread

[0063] Fig. 1 schematically shows a perspective view of a melt spinning winder 1. The melt spinning winder 1 comprises a melt spinning device 10 configured to extrude the synthetic thread Fl to Fn and a winder 20 configured to wind the synthetic thread Fl to Fn.

[0064] The yarn Fl - Fn is fed by means of a chute 30 from the melt spinning device 10 to the winding device 40 in the yarn fall direction FR.

[0065] Between the spinning device 10 and the drop shaft 30, a cooling shaft 20 is also provided, in which the threads Fl to Fn extruded from the melt spinning device 10 are cooled.

[0066] The melt spinning device 10 comprises a spinning beam 11 in which a plurality of spinning packs 14 are provided, each supplied with a plastic melt via a melt supply line 12, so that the spinning packs 14 can each extrude a plurality of filaments. The plurality of filaments from each of the spinning packs 14 are combined into a synthetic thread Fl to Fn at a convergence point 21 positioned in the cooling shaft 20.

[0067] For reasons of clarity, the figures show only a maximum of two spin packs or synthetic threads by way of example. In practice, or in preferred embodiments, up to 12 spin packs or more can be provided per winding device 10 and, accordingly, in each melt spinning device 10 for each winding device 40. Corresponding preparation positions and / or guide positions are preferably provided at the convergence point 21, which are each spaced apart from one another.

[0068] The chute 30 shown in Fig. 1 comprises a predetermined number of rectangular chute sections 31, a trapezoidal chute section 32, and a chute exit section 33. The chute 30 forms a protected guide channel for the extruded, cooled, and combined threads F1 to F10 and bridges the distance between the cooling chute 20 and the winding device 40.

[0069] The distance of the drop shaft 30 may be shorter and / or longer depending on the system.

[0070] The drop shaft 30 has an inlet opening 37 adjacent to the cooling shaft, into which the synthetic threads Fl to Fn can be inserted, and an outlet opening 36 adjacent to the winding device 40, from which the synthetic threads Fl to Fn emerge, so that they are applied to the winding device 40 and wound onto tubes (not shown) which are mounted on winding spindles 43 of the winding device 40, to form winding spools 100.

[0071] Furthermore, the drop shaft rectangular pieces 31 each have a rectangular cross-section which they maintain constant over their entire length, whereas the drop shaft trapezoidal piece 32 and the drop shaft outlet piece 33 have in their overall shape a cross-sectional section which narrows towards the outlet opening.

[0072] The winding device 40 has a godet section 41 and a winding spindle section 42.

[0073] The godet section 41 has, as shown schematically in Fig. 4, a drafting device which has a first godet 71 and a second godet 72.

[0074] Between the first godet 71 and the second godet 72, a laying roller 70 is positioned, which is movable along a guide 75 from the second godet 72 towards the first godet 71 in order to apply the synthetic thread Fl-Fn to at least the second godet 72, as is schematically shown in the sequence in Figs. 4 and 5.

[0075] The winding device 40 has in the spool section 42 two winding spindles 43 for winding winding spools 100 at a plurality of winding stations W1 to Wn - see Fig. 6 - wherein the number of the first to n-th winding stations W1 to Wn also defines the number of winding spools 100 and corresponds to the number of first to n-th threads Fl to Fn.

[0076] Furthermore, a suction device 50 is provided on the godet section 41 of the winding device 40. The suction device 50 has a thread suction line 53, via which a suction air flow can be provided with a predetermined first pressure value D1, a second pressure value D2, and a third pressure value D3, which can each be provided in a predetermined pressure range I, II, III.

[0077] Fig. 1 schematically shows which pressure range I, II, III or which pressure magnitude Dl, D2, D3 is provided in the suction device 50, depending on the position of the thread Fl to Fn in the chute 30, between the outlet opening 36 and the godet section 41 and at the winding spindle section 42 of the winding device 40.

[0078] As can be deduced from Figures 1, 4 and 7 or 8, the pressure range I with the pressure value D1 is preferably provided on the suction device 50 when the thread Fl to Fn falls from the inlet opening 37 to the outlet opening 36. The pressure range III with the pressure value D2 is then preferably set when the thread Fl to Fn leaves the outlet opening 36 and passes the godet section 41. In this case, the thread Fl to Fn can be intercepted by a thread suction device 110 at the base of the winding device 40 so that the winding device 40 is not contaminated by accumulating threads Fl to Fn. The thread suction device 110 is in operation and sucks up the thread Fl to Fn until the thread Fl to Fn is applied to the winding device 40 and can be wound into a winding spool 100. When the thread is applied to the winding device 40, the suction device 50 has the pressure size D3 in the pressure range III.

[0079] Figures 2 and 3 schematically show a detailed view of the outlet opening 36 of the chute 30. A cross-sectional constriction device 38 is mounted on the chute outlet piece 33. The cross-sectional constriction device 38 can reduce the cross-sectional area of ​​the outlet opening 36. By narrowing the cross-sectional area by means of the cross-sectional constriction device 38, the suction effect of the suction device 50 can be increased, particularly when feeding the thread Fl to Fn from the spinning device 10 to the outlet opening 36 of the chute, so that the thread Fl to Fn can be fed accurately and at the predetermined location, which can be specified by the suction device 50.

[0080] The cross-sectional narrowing device 38 has a first wing flap 34 and a second wing flap 35, which can each be adjusted by means of an actuator 39 into the cross-sectional narrowing position QE shown in Fig. 2 and into the cross-sectional enlargement position QV shown in Fig. 3.

[0081] The actuators 39 can be controlled by the control system of the winding device 40. The cross-sectional narrowing device 39 and its associated wing flaps 34, 35 can also be adjusted manually by an operator.

[0082] The wing flaps 34 have a triangular shape. The cross-sectional wing flaps provide an exit opening at the inlet and outlet sections, even in the cross-sectional narrowing position, so that the thread can exit there toward the winding device 40.

[0083] Figures 4 to 6 schematically illustrate the transfer of the yarn Fl to Fn via the chute 30 with the aid of the suction device 50, in particular a part of the application process at the winding device 40. As can be seen from Fig. 4, the suction device 50 has a first suction opening 51, which is arranged adjacent to the outlet opening 36 of the chute 30. Attached to the first suction opening 51 is a collecting basket 54, which preferably has two functions.

[0084] The collecting basket 54 serves to improve the collection of the falling synthetic thread Fl to Fn and the supply to the first suction opening 51. The collecting basket 54 can also have additional flow deflection panels that direct the flow of the suction flow towards the outlet opening 36, so that the synthetic thread is also additionally sucked in.

[0085] The first intake port 51 is fluid-tightly connected to an air flow line 55 on the thread suction line 53 of the suction device 50. The thread suction line 53 is connected to a corresponding thread collection container and a suction device that can generate a corresponding intake air flow.

[0086] The suction device 50 further has a second suction port 52 on the godet section 40. The second suction port 52 is arranged adjacent to a thread cutting device 60. The thread cutting device 60 has the function of severing the thread coming from the outlet port 36 if a thread breakage occurs in the winding device 40. The second suction port 52 is connected to the thread suction line 53 via a second air flow line 55.

[0087] The air flow line 55 of the first suction port and the air flow line 55 of the second suction port can each be supplied with the suction flow from the thread suction line 53 by means of a valve at the branching point if a corresponding pressure range I, II, III has been selected by the control of the winding device 40 and / or the operator.

[0088] In Fig. 4, the cross-sectional constriction device 38 is in the cross-sectional constriction position, in which the first wing flap 34 and the second wing flap 35 advantageously constrict the outlet opening 36 of the chute 30, so that the suction effect of the suction device 50 can act more specifically on the synthetic thread Fl to Fn. During the application step shown in Fig. 4, the suction device 50 is switched to the pressure range I.

[0089] In Fig. 5, the synthetic thread F is applied at least in the godet section 41 of the take-up device 40, which can be seen from the fact that the transfer roller 70 has moved from the second godet 72 to the first godet 71 and the thread path of the synthetic thread F rests against the circumferential surfaces of the first godet, the transfer roller 70, and the second godet 72. Furthermore, the cross-sectional narrowing device 38 has been moved into the cross-sectional enlargement position QV, which can be seen from the unfolded wing flaps 34 and 35. In the application position of the thread F shown in Fig. 5, the suction device 50 is set to the pressure range II.

[0090] In Fig. 6, the almost complete application of the synthetic thread F to the winding device 40 can be seen in that the head thread guides 43 have moved from the parking position in the vertical section of the guide rail 74 into the horizontal section of the guide rail 74 and to the corresponding winding positions W1 to Wn, each with a first thread Fl to the nth thread Fn. In this application position, the suction device 50 has been connected to the pressure area III.

[0091] In Fig. 7 and 8, the possible first, second and third pressure values ​​Dl, D2, D3 of the respective first, second and third pressure ranges I, II, III are given in graphs over time t, with the time t in seconds being given on the abscissa and the pressure D in hPa being given on the ordinate.

[0092] As shown, for example, in Fig. 7, the first pressure variable Dl of the pressure range I is the largest value and can be constant over time t and / or continuously increase linearly over time tl to t2 (see dashed line), depending on the thread type Fl - Fn and properties of the filament to be sucked in.

[0093] For pressure range II over the period t2 to t3, the second pressure variable D2 is smaller than the first pressure variable D1, since the suction device 50 has already captured the thread Fl-Fn for the winding device 40, and a smaller second pressure range II with a smaller pressure variable D2 can be selected here. In the third pressure range D3, the thread Fl-Fn is applied to the winding device 40 and can have the third pressure variable D3, which can also be kept constant over the time t3 to t4 and have the value 0 after t4.

[0094] Fig. 8 shows another embodiment of the pressure curve of the intake device 50, wherein the first pressure variable D1 in pressure range I over time t1 to t2 is smaller than the second pressure variable D2 for the second pressure range II, but greater than the third pressure variable D3 for the third pressure range D3. Here, too, the curves of the associated pressure variables can be provided as constant and / or continuously increasing or decreasing over time t (see dashed lines).

[0095] Fig. 9 schematically shows a blog diagram of a method for feeding and applying a synthetic thread in steps S1 to S10.

[0096] In step S1, a plurality of filaments are extruded from a plastic melt and combined to form a synthetic thread Fl to Fn in the spinning device 10. In step S2, the synthetic thread Fl to Fn is fed to an inlet opening 37 of the chute 30, followed shortly thereafter by the introduction of the synthetic thread Fl to Fn into the chute 30 in step S3.

[0097] Shortly thereafter, the intake device 50 is switched to the first pressure range I with a predetermined first pressure value D1. At the same time, in step S5, the cross-sectional area of ​​the outlet opening 36 is reduced by means of the cross-sectional constriction device 38. In the pressure range I, the first pressure value D1 can have a value between 550 hPa and 1,850 hPa.

[0098] The synthetic thread Fl to Fn or the majority of the synthetic threads falls along the chute 30 in a relatively short period of time, so that in step S4 the synthetic thread can be collected at the collecting device 50 by means of the suction device and the collecting basket 54 coupled thereto.

[0099] After collection in step S6, the outlet opening 36 is enlarged in step S7, in which the cross-sectional constriction device 38 is moved from the cross-sectional constriction position QE to the cross-sectional enlargement position QV. In step S8, the second pressure range II is provided at the intake device 30, in particular at the first intake opening 51, essentially simultaneously. In pressure range II, the pressure variable D2 can range from 150 to 155 hPa.

[0100] In step S6, the synthetic thread Fl to Fn is then applied to the winding device 40 up to the winding points W 1 to Wn. After the winding process has begun in the winding device 40, a third pressure range III is provided in this suction device 50, wherein the third pressure range III can have a predetermined value of 0 to 150 hPa.

[0101] List of reference symbols

[0102] 1 melt spinning winder

[0103] 10 Melt spinning device

[0104] 11 spinning beams

[0105] 12 Melt feed line

[0106] 14 spinning package

[0107] 20 cooling shaft

[0108] 21 Convergence point

[0109] 30 Drop shaft

[0110] 31 F all shaft rectangular piece

[0111] 32 F all shaft trapezoid piece

[0112] 33 Drop shaft exit piece

[0113] 34 first wing flap

[0114] 35 second wing flap

[0115] 36 Exit mouth

[0116] 37 Entrance mouth

[0117] 38 Cross-section narrowing device

[0118] 39 Actuator

[0119] 40 Winding device

[0120] 41 Galette section

[0121] 42 winding spindle section

[0122] 43 winding spindle

[0123] 50 intake device

[0124] 51 first intake port

[0125] 52 second intake port

[0126] 53 Thread suction line

[0127] 54 Catch basket

[0128] 55 Air flow line

[0129] 60 Thread cutting device (gathering chopper)

[0130] 70 laying roll

[0131] 71 first galette

[0132] 72 second godet 73 head thread guide

[0133] 74 Guide rail

[0134] 75 leadership

[0135] 100 winding spool 110 thread suction device

[0136] Dl to D3 first, second, third print size

[0137] DI, DII, Dill first, second, third pressure range

[0138] F, Fl-Fn first to nth thread

[0139] FR Thread drop direction QE Cross-sectional narrowing position

[0140] QV cross-sectional magnification position

[0141] W1 to Wn first to n-th winding position

Claims

Patent claims 1. Method for feeding a synthetic thread (Fl-Fn) from a melt spinning winding device (1), comprising a melt spinning device (10) which is designed to extrude the synthetic thread (Fl-Fn), and a winding device (20) which is designed to wind the synthetic thread (Fl-Fn), wherein the thread (Fl-Fn) can be fed from the melt spinning device to the winding device (40) by means of a chute (30), characterized in that the feeding can be adjusted by means of a predetermined pressure range (I, II, III) in a suction device (50) on the winding device (40).

2. Method according to claim 1, characterized in that - a first pressure range (I) with a predetermined first pressure value (Dl) is provided in the suction device (50) when the synthetic thread (Fl-Fn) is guided from the melt spinning device (10) to the winding device (40), - a second pressure area (II) with a predetermined second pressure value (D2) is provided in the suction device (50) when the synthetic thread is applied to the winding device (16) and / or - a third pressure area (III) with a predetermined third pressure size (D3) is provided in the suction device (50) when the synthetic thread is applied to the winding device (16).

3. Method according to at least one of the preceding claims 1 or 2, characterized in that the first pressure variable (Dl) has a different amount than the second pressure variable (D2) and / or third pressure variable (D3) and / or that the first pressure variable (Dl), the second pressure variable (D2) and / or the third pressure variable (D3) are / is set based on the denier, the composition and / or the properties of the synthetic thread (Fl-Fn).

4. Method according to at least one of the preceding claims, characterized in that the first pressure range (I) ranges substantially between 550 and 850 hPa, that the second pressure range (II) ranges substantially between 150 and 550 hPa, and / or that the third pressure range (III) ranges substantially between 0 and 150 hPa.

5. Method according to at least one of the preceding claims, characterized in that the regulation and / or control of the pressure areas is / is carried out manually and / or automatically, wherein the control of the pressure areas (I-III) is controlled over predetermined time periods (t1 to t4), wherein the regulation of the pressure areas (I-III) is carried out via sensors by means of which the position of the thread in the melt spinning device (10) and the winding device (40) can be tracked.

6. Method according to at least one of the preceding claims, characterized in that the control and / or regulation of the printing areas (I-III) is combined with an automatic, semi-automatic and / or manual application process.

7. Method according to at least one of the preceding claims, characterized in that the first pressure range (I), the second pressure range (II) and / or the third pressure range (II) is kept constant over time (t) and / or is varied over time.

8. Method according to at least one of the preceding claims, characterized in that the cross section of the chute (30) is narrowed by means of a cross-sectional narrowing device (38) when the first pressure range (I) is applied and is enlarged when the second pressure range (II) is applied.

9. Method according to at least one of the preceding claims, characterized in that the following steps are carried out to feed the synthetic thread: - extruding (Sl) a plurality of filaments from a plastic melt and combining the plurality of filaments to form a synthetic thread (Fl-Fn), - feeding (S2) the synthetic thread (Fl-Fn) to an inlet opening (37) of a drop shaft (30), - Insertion (S3) of the synthetic thread into the chute, - Providing (S4) the first pressure range at a suction device (50), - reducing (S5) the cross-sectional area of ​​the outlet opening (36) of the chute, - collecting (S6) the synthetic thread at the suction device (50), - Enlargement (S7) of the outlet opening (36) of the chute, - Providing (S8) the second pressure area (II) at the suction device (30), - Applying (S9) the synthetic thread to the winding device, - Providing (S10) the third pressure area (III) at the suction device (50).

10. Winding device (40) for winding a synthetic thread from a melt spinning device (10), wherein the winding device is arranged to carry out the method according to at least one of the preceding claims.

11. Winding device according to claim 10, characterized in that a cross-sectional narrowing device (38) is formed on a chute (30) belonging to the winding device at the outlet opening (36) of the chute, wherein the cross-sectional narrowing device (39) has a wing flap (34, 35) which is articulated to the outlet opening (26) of the thread chute (30) and is movable manually and / or by means of an actuator (39) between a cross-sectional narrowing position (QE) for narrowing the outlet opening (26) and a cross-sectional widening position (QV) for opening the outlet opening (26).

12. Winding device according to at least one of the preceding claims 10 or 11, characterized in that the suction device (50) has a first Intake opening (51) which can be coupled to a collecting basket (54), and / or that the first intake opening has an acceleration nozzle.

13. Winding device according to at least one of the preceding claims 10 to 12, characterized in that the collecting basket (54) is arranged to redirect the air flow of the first intake opening.

14. Winding device according to at least one of the preceding claims 10 to 13, characterized in that the suction device (50) has a second suction opening (52) which cooperates with a thread cutting device (60) which is designed to cut the synthetic thread.

15. Winding device according to at least one of the preceding claims 10 to 14, characterized in that an air flow diversion (55) is detachably coupled to the first suction opening (51) of the suction device and / or to the second suction opening of the suction device, which is adjacent to the thread cutting device (60).

Images