Creeling method and creeling machine

Abstract

The invention relates to a yarn package doffing method and a doffer. After winding, the yarn packages wound at a plurality of winding positions in a winding winder are picked up by a receiving spindle of the doffer. Before the yarn packages are pushed away from the winding spindles, the loose yarn ends of the yarn packages are fixed on the peripheral surface of the respective yarn package by yarn end fixation means of the doffer which are introduced into the winding winder, in order to ensure a reliable doffing and conveying of the yarn packages. For this purpose, movable yarn end fixation means which can be reciprocally guided between a parking position and a deployed working position are arranged on the frame of the doffer.

Description

Technical Field

[0001] This invention relates to a method for unloading yarn bobbins and a unloading machine for receiving and delivering yarn bobbins. Background Technology

[0002] In the melt spinning process for manufacturing synthetic yarns, numerous yarns are generated at multiple spinning positions. At the end of the process, the yarn bundles are individually wound into bobbins at each spinning position. Therefore, it is common to have multiple winding machines arranged side-by-side along a corridor, each winding multiple yarns into bobbins. The wound bobbins are received in the winding machines and can be dispatched along the corridor of a movable doffing machine. Thus, methods for doffing bobbins and doffing machines are known, for example, from EP0026471A1.

[0003] In known methods of doffing yarn bobbins, the receiving mandrel of the doffing machine is positioned directly in front of the winding spindle on the winding machine to receive the yarn bobbin wound on the winding spindle. After the tensioning device of the winding spindle has been released, the yarn bobbin is pushed away from the winding spindle and fed to the receiving mandrel of the doffing machine via the pushing device of the winding machine. To eliminate slack yarn ends hanging from the yarn bobbin, an insulating heating wire is provided to the receiving mandrel of the doffing machine. The yarn bobbin is guided through the insulating heating wire, and the slack yarn ends are fused together by means of the insulating heating wire. However, this generates waste yarn randomly generated on each circumference of the yarn bobbin, and in some cases, even sucked into the continuous winding process of the winding machine. In addition, the heating wire is spaced apart from the circumference of the yarn bobbin, so that the slack yarn ends on the yarn bobbin are only shortened, but continue to lie loosely on the yarn bobbin.

[0004] Therefore, it is known in the prior art that loose yarn ends on a yarn bobbin are fixed within a winding machine by a doffing machine before being unwound. Such winding machines are well known in the prior art and are disclosed, for example, in DE4413885A1. In this regard, all of the plurality of winding machines have additional auxiliary devices for fixing the resulting loose yarn ends on the circumference of the yarn bobbin once winding is complete. Thus, each winding machine has complex auxiliary devices to allow the wound yarn bobbin to be unwound by the doffing machine. Summary of the Invention

[0005] Therefore, the object of the present invention is to improve this type of yarn bobbin winding method and this type of bobbin doffing machine so that the protruding winding spindle of the yarn bobbin self-winding winding machine can be reliably doffed, while the equipment of the winding winding machine is not very complicated.

[0006] According to the present invention, this objective is achieved by a bobbin dropping method, wherein, before the bobbin is pushed away from the winding spindle, the loose ends of the bobbin are fixed to their respective circumferential surfaces by a bobbin-fixing device introduced into the winding machine by the bobbin dropping machine.

[0007] In the case of the doffing machine of the present invention, this objective is achieved in that the apparatus carrier for fixing the loose yarn end on the circumferential surface of the yarn bobbin has a movable yarn end fixing device that can be guided in a reciprocating motion between a resting position and an unfolded working position on the apparatus carrier.

[0008] This invention achieves two key advantages: firstly, the yarn bobbin can be reliably unwinded from the spindle; secondly, it allows for conveying without any loose yarn ends falling to the ground. Furthermore, it advantageously avoids the separation of loose yarn ends. A particular advantage of this invention is that multiple conventional winding machines can be used without additional auxiliary devices to secure the yarn ends.

[0009] To ensure that the yarn end of the yarn bobbin is securely attached to the winding spindle after replacement within the winding machine, a preferred variation is to simultaneously spray fluid onto the yarn end area on the circumferential surface of the yarn bobbin during spindle rotation. Depending on the fluid, a protective layer can even be created on the yarn bobbin to collectively surround the slack yarn end. A viscous liquid can also be used to adhere the slack yarn end to the circumferential surface of the yarn bobbin only within the tie-down bead area. However, it is preferable to consider using a fluid composed of a spinning finishing agent for further processing.

[0010] Therefore, the yarn end fixing device of the doffing machine of the present invention has multiple nozzles, which are arranged at intervals and connected to a fluid pump and a fluid tank. Thus, all nozzles can be activated simultaneously to spray fluid onto the circumference of the yarn bobbin.

[0011] In particular, when a spinning finishing agent is used here, fluid adhesion can be improved even further, i.e., the yarn end is pressed against the circumferential surface of the yarn bobbin by one or more contact rollers.

[0012] Therefore, the following improved version of the doffing machine of the present invention is preferred, wherein the yarn end fixing device has a plurality of freely rotatable rollers spaced apart from each other, or a long strip-shaped freely rotatable roller extending across the nozzle. Thus, it is even possible to improve the adhesion of loose yarn ends to the circumference of the yarn bobbin.

[0013] The tensioning device on the winding spindle must first be released so that the yarn bobbin can fall from the winding spindle of the winding machine. For this purpose, a tubular impact head, typically located in the winding spindle, is displaced against the spring force by compressed air. In this regard, compressed air needs to be transmitted to the winding spindle, which is typically achieved by a rotary conveyor in the winding machine. In this regard, an alternative solution according to the invention is provided for the purposes of the invention, wherein the release of the tensioning device on the winding spindle is initiated by transmitting compressed air from the bobbin faller to the winding spindle before the yarn bobbin is received.

[0014] Therefore, multiple rotary transmission devices within the winding machine can be eliminated. The compressed air required to loosen the tensioning device can be directly supplied by the doffing machine at each winding spindle of the winding machine.

[0015] To this end, the doffing machine according to the invention has a compressed air reservoir on the machine base connected to a movable compressed air adapter, which can be selectively connected to the compressed air connector of one of the winding spindles of the winding machine. The compressed air reservoir may have a compressed air volume that allows the tensioning devices on multiple winding spindles to be released.

[0016] Further decompression of the winding machine during bobbin doffing can be achieved through a modification where, to push the bobbin away from the winding spindle, an extraction device of the doffing machine is introduced into the winding spindle, through which the bobbin can be moved onto the circumference of the winding spindle. Any coordination between the doffing machine controller and the winding machine controller for bobbin doffing is thus minimized. The bobbin can be doffed from the winding spindle from its resting position solely through the action of the doffing machine, without the involvement of any auxiliary devices from the winding machine. Another advantage is the ability to achieve relatively short changeover times, as bobbin loosening and extraction can occur directly before and after the doffing machine controller is installed.

[0017] Therefore, the doffing machine is preferably used in the following improved embodiment of the invention, wherein the machine base has a movable extraction device that can be guided to an extraction position for obtaining the protrusion of the yarn bobbin in a reciprocating motion parallel to the receiving mandrel, wherein the extraction device has at least one thrust mechanism for guiding the yarn bobbin on one of the winding spindles.

[0018] This function of the winding machine can be enhanced by shielding the pre-wound bobbin relative to the bobbin about to be wound. For this purpose, a movable shielding unit can be used on the machine base, which is moved between the winding spindles of the winding machine after spindle replacement. Once the bobbin has been removed from the winding spindle, the shielding unit is retracted from the winding machine.

[0019] To remove yarn residue and lint from the winding spindle after it has been unwound, a particular variation is advantageous where, after the yarn bobbin has been removed, the clearing device of the unwound machine is introduced into the winding machine parallel to the winding spindle. Then, the circumference of the winding spindle is removed mechanically by brushing or non-contactly by blowing to remove yarn residue.

[0020] For this purpose, the machine base is equipped with a movable yarn clearing device, which can be reciprocated between a resting position and a working position within the winding machine. The yarn clearing device has at least one clearing mechanism for removing yarn residue from the circumferential surface of one of the winding spindles of the winding machine. Each winding spindle of the winding machine can thus be cleaned before receiving a new winding bobbin. Attached Figure Description

[0021] The following will explain in detail the yarn bobbin doffing method according to the present invention through an embodiment of the doffing machine and with reference to the accompanying drawings, in which:

[0022] Figure 1.1 An embodiment of the drum-feeding machine according to the present invention is shown schematically in a side view;

[0023] Figure 1.2 This schematically illustrates the equipment used in front of the winding machine. Figure 1.1 Side view of an embodiment;

[0024] Figure 2 Schematic illustration based on Figure 1.1 Front view of an embodiment;

[0025] Figure 3.1 schematically shown Figure 1.1 and Figure 2 Plan view of the yarn fixing device in an embodiment;

[0026] Figure 3.2 Schematic illustration based on Figure 3.1 A plan view of an alternative embodiment of the yarn end fixing device;

[0027] Figure 4 Schematic illustration based on Figure 1.1 and Figure 2 A cross-sectional view of the compressed air adapter of an embodiment;

[0028] Figure 5 This schematic diagram illustrates the use of a winding machine based on... Figure 1.1 Side view of an embodiment;

[0029] Figure 6 This schematic diagram illustrates the use of a winding machine based on... Figure 1.1 Side view of an embodiment; and

[0030] Figure 7 Schematic illustration based on Figure 1.1 The yarn clearing device section of the embodiment. Detailed Implementation

[0031] According to the first embodiment of the drogue of the present invention, Figure 1.1 and Figure 2It is schematically shown in multiple views. Figure 1.1 An embodiment is shown in a side view, and... Figure 2 An embodiment is shown in the front view. Unless one of the figures is explicitly mentioned, the following description applies to both figures.

[0032] Embodiments of the drum-dropping machine are indicated by reference numeral 5 in these and following figures. The drum-dropping machine 5 has a movable base 8, which is moved in a self-driven, remote-controlled manner by a drive mechanism not shown here. A protruding receiving spindle 6 is mounted on the base 8. In this embodiment, the receiving spindle 6 is held on the base 8 by a height-adjustable slide 17. The receiving spindle 6 is designed as a hollow cylinder and has a compressed air adapter 12 at its free end. The compressed air adapter 12 is connected to a compressed air reservoir 10 via an internal compressed air line 11. The compressed air reservoir 10 is mounted on the base 8 and is... Figure 1.1 The dashed lines in the diagram indicate this. Compressed air line 11 and compressed air adapter 12 are also made of... Figure 1.1 The dotted line in the figure shows this. The function of the compressed air adapter 12 on the free end of the receiving spindle 6 will also be discussed below.

[0033] The yarn end fixing device 9, the extraction device 15, and the yarn clearing device 16 are held on the machine base beside the receiving mandrel 6. The additional devices on the machine base 8 will be described in detail below in terms of their structure and function.

[0034] The yarn end fixing device 9 has a thrust actuator 9.2, which allows it to be fixed in the parking position (e.g., Figure 1.1 The reciprocating motion guide yarn end fixing device between the working position (shown) and the unfolded working position. A thrust actuator 9.2 is fixedly connected to a support 9.1, on which a plurality of nozzles 9.3 are held. The nozzles 9.3 are arranged on the thrust actuator 9.2 at predetermined intervals and on the support 9.1 in a predetermined number. The intervals between the nozzles 9.3 and the number of nozzles 9.3 on the support 9.1 are selected according to the spacing and number of winding positions of the winding machine, where the yarn bobbin is obtained by the doffing machine 5.

[0035] Also refer to Figure 3.1 and Figure 3.2 In order to further explain the yarn end fixing device 9. The yarn end fixing device 9 is in Figure 3.1 The plan view is schematically shown. (As shown from...) Figure 3.1 As seen in the view, nozzles 9.3 are arranged side-by-side on support 9.1 and centrally connected to metering pump 9.5. Metering pump 9.5 is connected to tank 9.6. Tank 9.6 and metering pump 9.5 are held on support 9.1 in this embodiment. However, in principle, tank 9.6 or tank 9.6 and metering pump 9.5 can also be mounted on base 8 and connected to metering pump 9.5 or nozzle 9.6 via hoses.

[0036] As from Figure 3.1 As seen in the view, nozzle 9.3 is assigned a contact roller 9.4. The contact roller 9.4 is rotatably mounted on support 9.1 and extends across all nozzles 9.3.

[0037] Also refer to Figure 1.2 In order to explain the function of yarn end fixing device 9. Figure 1.1 For example, the implementation of the cassette discharge machine Figure 1.1 The diagram shows the yarn in operation on a winding machine 1. The winding machine 1 has multiple winding positions 1.1 to 1.5 to simultaneously wind multiple yarns to form a yarn bobbin. For this purpose, the winding machine 1 has two protruding winding spindles 2.1 and 2.2, which are held on a winding turntable 3. The winding spindles 2.1 and 2.2 and the winding turntable 3 are driven by a drive mechanism 4. Such winding machines are well known in the prior art and therefore will not be further explained here.

[0038] During operation, the yarn bobbin 7 is alternately wound around the circumference of the winding spindles 2.1 and 2.2. Once the yarn bobbin 7 reaches a predetermined final diameter, the winding spindles 2.1 and 2.2 are rotated by the winding turntable 3 and alternately guided to the working area and changeover area. Figure 1.2 In the illustrated condition, the winding spindle 2.1 is located in the changing area. The yarn bobbins 7 on the winding spindle 2.1 are then ready to be unwound by the doffing machine 5. In the illustrated operating condition, the yarn has been cut between the winding spindles 2.1 and 2.2, so that a slack yarn end is located on each wound yarn bobbin 7.

[0039] In order for the yarn bobbins 7 to be self-dropping from the winding spindles 2.1, the doffing machine 5 is positioned in front of the winding machine 1 such that the free ends of the winding spindles 2.1 and the receiving mandrel 6 are positioned close to each other. Once the doffing machine 5 has reached this position, the yarn end fixing device 9 on the machine base 8 is activated. The thrust actuator 9.3 guides the support 9.1 with nozzles 9.3 into the winding machine 1, from the resting position to the working position. In the working position, the yarn end fixing device 9 is positioned such that each yarn bobbin 7 is assigned a nozzle 9.3, and the contact pressure roller 9.4 is supported on the circumference of the yarn bobbin 7. The winding spindles 2.1 are slowed down here. The nozzles 9.3 are activated during this process, so that fluid is sprayed onto the surface of the yarn bobbin 7 via the nozzles 9.3 through the metering pump 9.5. The entire resting surface or only the binding beads on the yarn bobbin 7 may be wetted, depending on the fluid and the nozzles 9.3. The yarn end of the yarn bobbin 7 can be fixed to the resting surface of the yarn bobbin 7 by means of a contact pressure roller 9.4 supported on the resting surface. A spinning finishing agent is preferably used as the fluid. However, a viscous fluid can also be used in principle, which improves the effect of fixing the loose yarn end to the yarn bobbin 7.

[0040] Figure 3.1 The operation of the yarn end fixing device 9 is highlighted by the yarn bobbin 7, which is drawn with dashed lines. The contact rollers 9.4 extend across all winding positions or yarn bobbins 7. However, in principle, loose yarn ends can also be fixed directly to the circumference of the yarn bobbin within the tie beads. Therefore, Figure 3.2 An alternative embodiment of the yarn end fixing device 9 is shown.

[0041] In such Figure 3.2 In the embodiment of the yarn end fixing device 9 shown, a plurality of contact rollers 9.4 are held in a manner that allows them to be rotatably mounted on a support 9.1. Each nozzle 9.3 is assigned to one of the contact rollers 9.4. The contact rollers 9.4 extend only across a small area of ​​the yarn bobbin 7, as shown by the dashed line, so that the loose yarn end can be fixed in the binding bead area.

[0042] Once the loose yarn end of the bobbin 7 to be unwound has been secured, the yarn end securing device 9 on the base 8 of the unwound machine 5 is returned to the parking position. Once the winding spindle 2.1 of the winding machine 1 has been fully decelerated, compressed air is connected to the winding spindle 2.1 via the compressed air adapter 12. Figure 4 This situation is illustrated schematically.

[0043] Figure 4 A small portion of the free protruding end of the winding spindle 2.1 and the receiving mandrel 6 is shown. A compressed air adapter 12 is movably mounted on the receiving mandrel 6 and connected to an adjusting actuator 13. The compressed air adapter 12 can be guided out via the adjusting actuator 13 and introduced into a compressed air connector 14 at the free end of the winding spindle 2.1. Compressed air is now transmitted and guided into the winding spindle 2.1 via a control valve (not shown here) assigned to the compressed air reservoir 10. A tensioning device, as known from EP2523884B1, is configured, for example, within the winding spindle 2.1. No further explanation is given here, and reference is made to the cited publications. The tensioning mechanism of the tensioning device releases the compressed air within the winding spindle 2.1, and the winding bobbin 7.1 of the yarn bobbin 7 can be dropped from the circumference of the winding spindle 21. The extraction device 15 of the bobbin dropper 5 is now actuated.

[0044] like Figure 1.1 and Figure 2 As shown, the extraction device 15 has a thrust mechanism 15.1, which can be guided between a rest position and a working position by means of a thrust actuator 15.2 in a reciprocating motion. The thrust mechanism 15.1 can be rotated on the thrust actuator 15.2 so that the yarn bobbin 7 can be extracted from the winding spindle 2.1, for example, by a thrust fork.

[0045] Figure 5The diagram shows the state in which the extraction device 15 is activated to extract the yarn bobbin 7 from the winding spindle 2.1. For this purpose, the thrust mechanism 15.1 is guided by the thrust actuator 15.2 such that the yarn bobbin is continuously guided from the winding spindle 2.1 onto the receiving mandrel 6. Once the last yarn bobbin 7 is held on the receiving mandrel 6, the extraction device 15 is guided back to its resting position on the machine base 8. This is achieved by rotating the thrust mechanism 15.1.

[0046] In order to prepare the winding spindle 2.1 to receive new winding bobbins, the yarn clearing device 16 on the machine base 8 is now put into operation. (The text abruptly ends here, likely due to an incomplete sentence or missing information.) Figure 1.1 and Figure 2 The yarn clearing device 16 includes a yarn clearing mechanism 16.1 and a feed actuator 16.2. For operation, the yarn clearing mechanism 16.1 can be moved from a rest position into the winding machine 1 by means of the feed actuator 16.2.

[0047] Also refer to Figure 6 and Figure 7 To further explain the yarn clearing device 16. Figure 6 A side view showing an embodiment of the doffing machine 5 and the winding machine 1. Figure 7 The diagram schematically shows a section of the winding spindle 2.1 including the yarn clearing mechanism 16.1. Refer to all the figures in the following description for details.

[0048] For example, especially from Figure 7 As seen in the view, in this embodiment, the yarn clearing mechanism 16.1 is formed by a brush 16.3, which is held on the circumferential surface of the winding spindle 2.1. The brush 16.3 is continuously guided along the entire length of the winding spindle by means of a feed actuator 16.2 to remove lint and yarn residue from the circumferential surface of the winding spindle. The winding spindle 2.1 of the winding machine 1 is here driven at a low speed.

[0049] The yarn clearing device 16 is also exemplary in its implementation. In principle, the yarn clearing mechanism 16.1 may also have one or more compressed air nozzles for, for example, blowing away yarn residue and lint on the circumference of the winding spindle.

[0050] According to Figure 1.1 and Figure 2The additional devices of the doffing machine 5 shown in the embodiment are merely exemplary in terms of their structural implementation. The possibility of having additional functions is important to the method of the invention; these additional functions are typically implemented by auxiliary devices in a winding machine using the doffing machine of the present invention. For example, instead of nozzles, the yarn end fixing device can have a label dispenser for providing labels, which are adhered to the circumference of the yarn bobbin to fix slack yarn ends. The compressed air transmission device of the doffing machine is particularly advantageous. The compressed air transmission device is responsible for supplying compressed air to the winding spindle to loosen the tensioning device. This eliminates the need for complex rotary piping within the winding machine. Furthermore, the yarn bobbin winding spindle on the circumference of the winding spindle is only released when the doffing machine is in place. Premature release of the yarn bobbin is not possible. In such cases… Figure 1.1 and Figure 2 The compressed air transmission device shown in the embodiment is also exemplary.

[0051] according to Figure 1.1 and Figure 2 The doffing machine 5 may include a movable shielding unit, which, as an auxiliary device, is pushed between the winding spindles of the winding machine during the changeover phase or when the yarn bobbin 7 is doffed. This prevents slack yarn ends from being carried into the first layer of the newly wound yarn bobbin. Thus, the auxiliary shielding device in the winding machine can be eliminated.

Claims

1. A method for doffing a yarn bobbin, wherein the yarn bobbin is wound on a protruding winding spindle of a winding machine having multiple winding positions, and wherein the yarn bobbin is obtained by a receiving mandrel of a doffing machine after winding, characterized in that... Before the yarn bobbin is pushed away from the winding spindle, the loose yarn end of the yarn bobbin is fixed to the circumference of the corresponding yarn bobbin by the yarn end fixing device introduced into the winding machine by the doffing machine.

2. The method according to claim 1, characterized in that, As the winding spindle rotates, fluid is ejected from the yarn bobbin in the region of the yarn end on the circumferential surface.

3. The method according to claim 2, characterized in that, The yarn end is pressed against the circumferential surface of the yarn bobbin by one or more contact rollers.

4. The method according to any one of claims 1 to 3, characterized in that, in Before the yarn bobbin is received, the tensioning device of the winding spindle is released by transmitting compressed air from the doffing machine to the winding spindle.

5. The method according to any one of claims 1 to 3, characterized in that, In order to push the yarn bobbin away from the winding spindle, the extraction device of the doffing machine is introduced into the winding machine parallel to the winding spindle, and the yarn bobbin can be pushed onto the circumference of the winding spindle by the extraction device.

6. The method according to any one of claims 1 to 3, characterized in that, in After the yarn bobbin has been pulled out, the yarn clearing device of the doffing machine is introduced into the winding machine parallel to the winding spindle.

7. A doffing machine for receiving and distributing bobbins (7), the bobbins being held on long, protruding winding spindles (2.1, 2.2) of a winding machine (1), the doffing machine having a movable base (8), at least one receiving mandrel (6) for receiving the bobbins (7) being held on the base, characterized in that, The base (8) has a movable yarn end fixing device (9) for fixing the loose yarn end on the circumferential surface of the yarn bobbin (7). The yarn end fixing device can be guided to reciprocate between a resting position and an unfolding working position on the base (8). The yarn end fixing device (9) is configured to be introduced into the winding machine.

8. The drum-dropping machine according to claim 7, characterized in that, The yarn end fixing device (9) has a plurality of nozzles (9.3) arranged at a mutual spacing and connected to a fluid tank (9.6) and a fluid pump (9.5).

9. The drum-dropping machine according to claim 8, characterized in that, The yarn end fixing device (9) has a plurality of contact pressure rollers (9.4) that are able to rotate freely when spaced apart from each other, or has a long strip of freely rotating contact pressure roller (9.4) that extends across the nozzle (9.3).

10. The drum-dropping machine according to claim 7, characterized in that, A compressed air reservoir (10) connected to the movable compressed air adapter (12) is disposed on the base (8), and the compressed air adapter (12) can be selectively connected to the compressed air connector (14) of one of the winding spindles (2.1, 2.2).

11. The drum-dropping machine according to claim 7 or 10, characterized in that, The base (8) has a movable extraction device (15) that can be guided to an extraction position for acquiring a yarn bobbin (7) in a reciprocating motion parallel to the receiving mandrel (6), wherein the extraction device (15) has at least one thrust mechanism (15.1) for guiding the yarn bobbin on one of the winding spindles (2.1, 2.2).

12. The drum-dropping machine according to claim 7 or 10, characterized in that, The machine base (8) has a movable yarn clearing device (16) that can be reciprocated between a parking position and a working position on the machine base (8). The yarn clearing device (16) has at least one yarn clearing mechanism (16.1) for removing yarn residue on the circumferential surface of one of the winding spindles (2.1, 2.2).

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