Method for compressed air control of the application process of a melt spinning device

Abstract

The invention relates to a method for compressed air control of the feed process of a melt spinning device (1) for extruding synthetic filaments (F) and an automatic winding device (2) for winding the synthetic filaments (F), wherein a compressed air value (DW1-DWn) is controlled and / or regulated at a predetermined time and / or at a predetermined pressure position (DP1-DPn) in a gathering process at the melt spinning device (1) and a feed process at the winding device (2) by the compressed air control based on the position of the filament bundle (FB) in the melt spinning device (1) and at the winding device (2).

Description

[0001] The invention relates to a method for compressed air control of the application process of a melt spinning device for extruding synthetic filaments and an automatic winding device (2) for winding the synthetic filaments.

[0002] It is known from the general state of the art to control compressed air for laying a filament bundle or a set of threads depending on an operating cycle.

[0003] WO2018108964A1 discloses a method and a device for laying up a yarn sheet in a melt spinning process, comprising at least one winding device with multiple reels and several winding stations downstream of the reels. The yarn sheet is drawn in by a suction flow through a pipe nozzle of a suction device and continuously discharged. The yarn sheet is guided by a movement of the pipe nozzle, the suction flow being controlled by the operating pressure of compressed air supplied to the suction device. To ensure sufficient yarn tension and reliable yarn guidance at every stage of the laying process, the operating pressure of the compressed air is varied depending on one of several operating cycles. A control valve interacts with a control unit for this purpose.

[0004] The operating pressure is preferably determined here based on thread tension.

[0005] However, the filament tension can only be detected when the filament is attached to the winding device. This means that energy is consumed during the time before the filaments or filament bundles are attached and collected, as no control or regulation of the compressed air is performed.

[0006] The object of the invention is therefore to provide a method for the compressed air control of the application process of a melt spinning device for extruding synthetic filaments and an automatic winding device for winding the synthetic filaments.

[0007] This problem is solved according to the invention by a method having the features of claim 1.

[0008] According to one aspect of the invention, a method for compressed air control of the feed process of a melt spinning device for extruding synthetic filaments and an automatic winding device for winding the synthetic filaments is provided, wherein a compressed air value is controlled and / or regulated at a predetermined time and / or at a predetermined pressure position in a gathering process at the melt spinning device and a feed process at the winding device by the compressed air control based on the position of the filament bundle in the melt spinning device and at the winding device.

[0009] This process saves energy because the pressure value is monitored, controlled and / or regulated from the melt spinning device and at the winding device.

[0010] Monitoring can also be performed according to a predetermined schedule. Control then takes place. In a control system, data and information from sensors can be evaluated by the pressure control unit and used to monitor the position of the filament bundle and / or regulate the compressed air.

[0011] According to a preferred embodiment of the method, the position of the filament bundle during collection and placement is determined in advance according to a schedule stored in the print control system and / or optically detected and / or controlled.

[0012] The schedule is determined in advance for the entire device and stored in the pressure control system. Additionally, the position of the filament bundle can be detected using sensors positioned at predetermined locations. The pressure control system can then use the sensor data for monitoring and regulation.

[0013] According to a further preferred embodiment of the method, a change in the pressure value is carried out at predetermined pressure positions, wherein the first pressure value is greater than the subsequent pressure values.

[0014] Ideally, each pressure position on the device should also allow for precise pressure adjustment. This saves energy, as a constantly high pressure value does not need to be maintained; instead, the pressure value can be adjusted.

[0015] According to a particularly preferred embodiment of the method, the pressure value when the filament is thrown into a collecting tube is greater than in the collecting tube and is smallest at the outlet of the collecting tube compared to the pressure values ​​at the corresponding pressure value positions when collecting and laying the filament bundle.

[0016] The manifold also creates a suction effect. The combined force of the compressed air and the suction effect of the manifold can lead to thread breakage. Lowering the pressure can prevent this and also save energy that would otherwise be required to generate the lower pressure.

[0017] According to a further preferred embodiment of the method, the pressure value is increased by a predetermined value at each application position when the device is placed on the winding device.

[0018] When the filament bundle is placed on the take-up unit, this happens automatically with the help of insertion aids that operate at each printing position. The filament bundle initially encounters a small resistance. To compensate for this, the pressure is increased by a predetermined amount, enabling automatic insertion onto the take-up unit without human intervention. The pressure is controlled by the pressure controller. If sensors are present at certain printing positions on the take-up unit that can detect the filament bundle, the pressure controller can also adjust the pressure accordingly, for example, by detecting the presence of a filament bundle at that particular printing position.

[0019] According to a particularly preferred embodiment of the method, to apply a filament bundle to the winding device, the filament bundle is collected in the collecting tube and pneumatically transferred to the winding device at a predetermined pressure value at an inlet of the collecting tube into the collecting tube and is conveyed at a pressure value in the collecting tube that is lower than the predetermined pressure value, wherein the setting of the respective pressure value is monitored by the pressure control.

[0020] When the filament bundle is in the collector tube, the pressure can be reduced due to the suction effect within the tube. The collector tube can also simultaneously provide a pressure supply that extends from the winding device to the melt spinning device.

[0021] According to a preferred embodiment of the method, the pressure value at the intake opening of the collecting pipe is greater than the pressure value at the outlet of the collecting pipe at the winding device.

[0022] Ideally, the highest pressure is present at the intake nozzle. The pressure can then be reduced and only increased again when the automatic attachment to the winding device starts.

[0023] According to a further preferred embodiment, the pressure value of the associated pressure value position is increased by a predetermined value when the device is placed at the associated pressure value position on the winding device.

[0024] When the synthetic filament bundle is laid on the winding device, the contact resistance increases by a predetermined amount at each pressure setting on the winding device. To compensate for this, a higher suction pressure is required, which is balanced by a corresponding increase in the pressure setting.

[0025] According to a particularly preferred embodiment of the method, each application position on the winding device is assigned a pressure value position, which is monitored by the pressure control.

[0026] Preferably, the pressure value of a print position is stored in the pressure controller. The necessary data can be determined beforehand through testing.

[0027] Additionally, this can be monitored using sensors during the experiments. The sensors can also be used to control the pressure.

[0028] According to a preferred embodiment of the method, the pressure values ​​in the area of ​​the melt spinning device are varied over a larger pressure range than the pressure values ​​when applying the material to the winding device.

[0029] Ideally, the pressure at the collecting pipe is highest when the filament bundles are being gathered, and is low at the outlet of the collecting pipe as the bundle leaves. The pressure increases when the bundle is applied to the winding device, but this pressure is lower than the pressure at the intake opening of the collecting pipe.

[0030] According to a further preferred design of the procedure,

[0031] The method according to the invention is explained in more detail below with reference to some exemplary embodiments of the method according to the invention and with reference to the accompanying figures.

[0032] They represent: Fig. 1 schematically a perspective view of a melt spinning device with a feed chute having a collecting tube and a winding device, both of which have a compressed air control according to the invention, Fig. 2 schematic detailed view of a starting position of the air pressure control Fig. 1 on a collecting tube for collecting a synthetic filament bundle, Fig. 3 schematic detailed view of an intermediate position of the air pressure control Fig. 1 at a suction position on an automatic winding device for automatically applying the synthetic filament bundle, Fig. 4 schematically a view of the automatic winding device for automatically applying the synthetic filament bundle, and Fig. 5 a diagram of a pressure curve over time during the collection and application of the melt spinning device and the winding device.

[0033] Fig. Figure 1 schematically shows a perspective view of a melt spinning device 1 with a feed chute 4. Via the feed chute 4, a filament bundle FB extruded from the melt spinning device 1, consisting of a multitude of filaments F, is guided via a collecting tube 5 to a winding device 2.

[0034] Both the melt spinning device 1 and the collecting tube 4 and the winding device 2 are equipped with a compressed air control 50 for controlling a compressed air or a first to nth pressure value DW1 - DWn for at least a first compressed air generator 51 and a second compressed air generator 53.

[0035] The compressed air control unit 50 monitors the respective pressure values ​​DW1 to DWn at the corresponding pressure positions DP1 to DPn, ensuring that the optimal pressure value DW1 to DWn is present at each pressure position DP1 to DPn. This also saves energy, as the pressure value DW does not need to be kept constantly high but can be adjusted to the specific situation, thus reducing the energy required to achieve a predetermined pressure value DP1 to DPn.

[0036] The pressure controller specifies, either via a schedule stored within the controller, the required pressure values ​​DP1 to DPn at the respective first to nth print positions DP1 to DPn. Sensors for detecting the passage of the filament bundle can also be located at each and / or predetermined position at print positions DP1 to DPn, thus enabling monitoring and recording of the filament bundle's position. The detection and monitoring of the filament bundle's position by the sensors FB can be communicated to the pressure controller via appropriate signal transmitters.

[0037] The signal transmitters can also be signal lines that are routed via the associated compressed air supply 54.1 to 54.2.

[0038] The manifold 5 itself can also have its own compressed air supply 54.3, via which compressed air can be supplied to the distribution shaft 4 via the first compressed air generator 51. Alternatively, a second compressed air generator 53 can be arranged at the supply shaft or at the distribution shaft 3. The second compressed air supply 53 is also controlled and / or regulated by the compressed air control unit 50. In the case of regulation, corresponding sensors are at least partially provided at the first to nth pressure positions DP1 to DPn. The manifold has at least three pressure positions DP1 to DP3. At pressure position 1, a first maximum pressure value Dmax can be provided so that the filament bundle FB supplied to the manifold 5 is drawn into the manifold.

[0039] When the filament bundle FB is in the collector tube 5, the pressure value DW can be reduced to a minimum due to the suction effect of the collector tube 5, which corresponds approximately to the pressure position DP2, so that the pressure value at the pressure position DP3 at the outlet of the collector tube 5 can have the smallest value over the entire compressed air path.

[0040] After leaving the collecting tube 5, the filament bundle FB is then transferred in the printing position WP4 to a first suction device 6, which sucks up the filament bundle and feeds it to a disposal device (not shown) so that the automatic application to the winding device 2 can be started.

[0041] This is also defined in a schedule at pressure position 50 and / or can be detected by corresponding sensors at pressure position WP4 and communicated to the pressure control unit 50. This can also occur via the associated compressed air supply 54.1, which is connected to and receives compressed air from the first compressed air generator 51. The value of the respective compressed air is set via the compressed air control unit 50.

[0042] The first compressed air generator 51 has at least one first compressed air supply 54.1, one second compressed air supply 54.2, and one third compressed air supply 54.3. The first compressed air supply 54.1 is in fluid-tight contact with the suction device. The second compressed air supply 54.2 is in fluid-tight contact with a thread-breaking cutting device 61 (see Fig. 4) and the third compressed air supply 54.3 is in fluid-tight contact with the collecting pipe 5.

[0043] In the Fig. In the embodiment of the compressed air control shown in Figure 1, there is also a second compressed air generator 53, which is responsible for the compressed air supply via the fourth compressed air supply 54.4.

[0044] The second compressed air supply 53 is optional. The entire compressed air supply can also be provided via the first compressed air generator 51.

[0045] Fig. Figure 2 schematically shows a detailed view of a starting position of the air pressure control 50. Fig. 1 on the collector pipe 5 in the distribution shaft 3. The collector pipe 5 has a suction opening 57 at a feed shaft inlet 40 of the feed shaft 4, where a distribution shaft 3 is adjacent, which additionally has a pressure connection coupling 56 via which the supplied compressed air supply 54 can be connected to suction guns (not shown) or similar compressed air consuming devices.

[0046] Distribution shaft 3 additionally features convergence point holders 7. Distribution shaft 4 shows, by way of example, a first convergence point holder 7.1 and a second convergence point holder 7.2.

[0047] The convergence point holders 7 combine the filaments F produced by a spinneret (not shown) into a filament bundle FB, which is then combined, whereby a filament bundle is produced for each convergence point 70 or each preparation point 72 at the first or second convergence point holder 7.1 or 7.2, which is inserted into the collecting tube 5 via the suction opening 57, so that at the feed position at the suction device 6 at the winding device 2 the application of the filament bundles to the winding device 2 can be carried out automatically.

[0048] The time of insertion of the suction nozzle 57 is either manually communicated to the pressure control 50 by an operator, or a corresponding sensor is located at the suction nozzle 57 that detects and records this and can communicate the pressure flow 50.

[0049] Fig. Figure 3 schematically shows a detailed view of a second intermediate position with the air pressure control 50. Fig. 1 at a fourth printing position WP4 from Fig. 1. The fourth pressure position WP4 is on the winding device 2 and is realized by the suction device 6 in the form of a suction gun 60.

[0050] The suction gun 60 has a collection funnel 62, through which the filament bundle FB can be collected from the collecting tube 5.

[0051] The suction gun then feeds the received filament bundle FB to a disposal device (not shown) before the filament bundle is placed on the winding device.

[0052] The winding device 2 has a galette carrier 20 and a chuck carrier 8.

[0053] In Fig. Figure 3 shows an additional second chuck 82 in a so-called off position. In the off position, the winding coil 91 is fully wound and can be removed with a suitable unwinding device, such as an off-position device, and placed in a corresponding intermediate storage area.

[0054] Fig. Figure 4 schematically shows a view of the automatic winding device 2 for automatically applying the synthetic filament bundle, which can be applied via the collecting tube 5 via the suction device 6 in the form of the suction gun 60.

[0055] The winding device 2 has a galette carrier 20 on which a first galette 21 and a second galette 22 are provided, by means of which the filament bundle FB can be pulled off and guided to the first to nth thread positioners 9.1 to 9.n.

[0056] The galette carrier 20 is provided with a first to nth positioning aid device 23.1 to 23.3 with the aid of which the filament bundle FB can be positioned at the respective positioning position or first to nth printing position of the winding device 2. Each positioning position or printing position is assigned a first to nth printing value DW1.

[0057] For example, in the first setup process, the first and second setup aids 23.1 and 23.2 are activated, so that with the fourth setup aid 23.4, a setup roll can be created which is guided in a corresponding guide between the first and second galette.

[0058] Additionally, an air turbulence device 24 is provided on the first galette carrier 20. The air turbulence device 24 causes the filaments F to swirl and knot together to form a filament bundle FB, so that so-called tangled knots can form in the filament bundle FB, thus enabling the formation of a processable thread. The tangled knots ensure that the filaments F swirl and cross-link with each other, so that the individual filaments F form a processable thread.

[0059] The filament bundles FB are then fed from the gathering position into the next position via the first to nth thread positioners 9.1 to 9.n, which are movable in a thread positioning guide 9 between a gathering and a placement position. Fig. As shown in Figure 4, the process proceeds to the end position, with each individual thread positioner 9.1 to 9.n capturing one thread bundle FB. Subsequently, each individual thread bundle FB is placed against the sleeve 90 positioned on one of the first chucks 81 or the second chuck 81, so that the filament bundles FB can be wound onto the respective sleeve 90 to form a winding spool 91.

[0060] For winding, a contact roller 83 is required, which presses the filament bundles FB against the sleeve 90, and a changing device 84, which is provided at each changing position.

[0061] In Fig. Figure 4 shows a first changing device 84.1 to an nth changing device 84n. The changing device 84 moves the filament bundle back and forth in the changing area 85, so that, for example, a cross winding can be carried out on the winding spool 91.

[0062] This in turn is carried out together with the contact roller 83, which is movably held on the chuck carrier 8 via contact roller carrier arm 87, so that an increase in the diameter of the winding coil 91 can be compensated.

[0063] When applying the yarn bundles to the winding device 2, the pressure value DW at the respective application position, be it the first galette 21 or second galette 22 and the thread positioners 9.1 to 9.n, is increased by a predetermined value, whereby the suction pressure is predetermined by the pressure control 50 and is applied at the suction gun 60 until the yarn bundles FB are correctly applied to the winding device 2.

[0064] Should a filament break occur during setup and / or winding, all filament bundles FB are cut at the filament break cutting device 61. A suction device 6 is provided above the filament break cutting device 61, which is activated when a filament break is detected and then, with a predetermined pressure value DW, suctions away the filament bundles FB arriving at the winding device 2.

[0065] The changing device 84.1 to 84.n is arranged on a changing carrier 86 of the chuck carrier 8.

[0066] Fig.Figure 5 shows a diagram of the pressure profile of a pressure D over time t during the collection and application of a filament bundle FB, starting from the melt spinning device 1 and the winding device 2. The maximum pressure value Dmax occurs at pressure position DP1 at the suction opening 57 of the suction gun, when the highest suction pressure is required. In the collecting tube 5, the pressure value DW is then reduced, also due to the suction effect of the collecting tube 5, until the smallest pressure value DW1 is reached at pressure position DP2 at the outlet of the collecting tube 5.

[0067] Then, via pressure control 50 at pressure position 3, the pressure value DW at the outlet of the collecting tube 5 is increased again, with the pressure value DP3 at the pressure position of the suction gun 60 being further increased. When applying the filament to the respective application positions on the automatic winding device 2, DP5, DP6 to DPn are increased at each pressure position, with pressure position DPn essentially corresponding to the application position at the individual thread positioners 9.1 to 9.n. The pressure value DW at the individual thread positioners can be the same.

[0068] The illustrated winding device 2 is designed for the automatic and independent application of yarn bundles. This means that the application of the yarn bundles FB to the winding device 2 can be carried out without a human operator.

[0069] The increase in the pressure value DW at the respective application positions can be explained by the fact that the resistance of the thread bundle increases at the respective application position, even if this resistance is minimal.

[0070] This necessitates an increase in pressure.

[0071] However, the increase in the pressure value DW and the maximum value of the pressure value Dmax can be estimated to be lower than if there is a continuous intake.

[0072] Upon completion of the application process, the pressure value DW can be reduced to a final pressure value DPE, which may also have a value of 0 hPa.

[0073] However, the pressure value DW can be activated and / or increased at the position of the thread breakage cutting device 61, so that the thread bundles FB can also be fed to a disposal device in an environmentally friendly manner.

[0074] In the event of a thread break, however, it is necessary to re-insert the thread bundles FB from the melt spinning device 1 to the winding device 2. Reference symbol list: 1 Melt spinning device 2 Winding device 20 Galette wearers 21 first galette 22 second galette 23.1 -23.n first to nth mooring aid 24 Air turbulence device 3 distribution shaft 4 feed shaft 40 Feed shaft entrance 5 Collector pipe 50 Compressed air control 51 first compressed air generators 53 second compressed air generator 54 Compressed air supply 54.1 - 54.n first to nth compressed air supply 55 Intake nozzle 55.1 - 55.n first to nth intake opening 56 Pressure connection coupling 57 Intake nozzle 6 Suction unit 60 suction gun 61 Thread breakage cutting device 62 funnels 7 Convergence Point Holders 7.1-7.2 first to second convergence point holder 70 Convergence point 72 Preparation site 8 chuck carriers 80 chuck turrets 81 first chuck 82 second chuck 83 Contact roller 84.1-84.n first to nth changing device 85 change range 86 Change carriers 87 Contact roller carrier arm 9 Thread positioning guide 9.1-9.n first to nth thread positioner 90 Sleeve 91 Winding spool D pressure DW1 - DWn first to nth pressure value Dmax max. pressure value DP print position DP1 - DPn first to nth print position DPE final pressure value FB Filament Bundle F Filament t time t1-tn first to nth time point Z schedule QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] WO 2018108964A1

[0003]

Claims

[1] Method for compressed air control of the feed operation of a melt spinning device (1) for extruding synthetic filaments (F) and an automatic winding device (2) for winding the synthetic filaments (F), wherein a compressed air value (DW1-DWn) is controlled and / or regulated at a predetermined time and / or at a predetermined pressure position (DP1-DPn) in a gathering operation at the melt spinning device (1) and a feed operation at the winding device (2) by the compressed air control (50) based on the position of the filament bundle (FB) in the melt spinning device (1) and at the winding device (2). [2] Method according to claim 1, characterized by , that the position of the filament bundle (FB) is detected and / or optically recorded and / or checked during collection and placement according to a schedule (Z) which is stored in the print control (50). [3] Method according to at least one of the preceding claims 1 or 2, characterized by , that at predetermined pressure positions (DP1-DPn) a change in the pressure value (DW1-DWn) is carried out, wherein the first pressure value (Dmax) is greater than the subsequent pressure values ​​(DW1-DWn). [4] Method according to at least one of the preceding claims, characterized by , that the pressure value (Dmax) when throwing (DP1) into a collecting tube (5) is greater than in the collecting tube (5) and is smallest at the outlet (DP2) of the collecting tube (5) compared to the pressure values ​​(Dmax - DW1) at the corresponding pressure value positions (DP1-DP6) when collecting and laying the filament bundle (FB). [5] Method according to at least one of the preceding claims, characterized by , that the pressure value is increased by a predetermined value at each application position when the device is placed on the winding unit. [6] Method according to at least one of the preceding claims characterized by, that to apply a filament bundle (FB) to the winding device (2), the filament bundle (FB) is collected in the collecting tube (5) and pneumatically transferred to the winding device (2) at a predetermined pressure value (Dmax) at a suction opening (DP1, 57) of the collecting tube (5) into the collecting tube (5) and is conveyed at a pressure value in the collecting tube that is lower than the predetermined pressure value (Dmax), the setting of the respective pressure value being monitored by the pressure control. [7] Method according to at least one of the preceding claims, characterized by , that the pressure value (Dmax) at the inlet (DP1, 57) of the collector pipe (5) is greater than the pressure value (DW1) at the outlet (DP3) of the collector pipe (5) at the winding device (2). [8] Method according to at least one of the preceding claims, characterized by, that the pressure value of the associated pressure value position is increased by a predetermined value when the device is placed at the associated pressure value position on the winding device. [9] Method according to at least one of the preceding claims, characterized by , that each application position on the winding device is assigned a pressure value position which is monitored by the pressure control. [10] Device according to at least one of the preceding claims, characterized by , that the pressure values ​​in the area of ​​the melt spinning device are varied over a larger pressure range than the pressure values ​​when applying it to the winding device.

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