Device for extracting and winding a thread

Abstract

The present invention relates to an apparatus for drawing and winding multiple filaments in a melt spinning process. The apparatus comprises a guide roller bracket (5) for accommodating at least two guide rollers (6) having driven guide roller housings (6.1), a frame (3) for accommodating multiple winding stations (1.1-1.5) distributed along a driven winding spindle (14), and a filament distribution device (4). The filament distribution device (4) has a movable guide (17) at each winding station (1.1-1.5), which can be guided back and forth between a mating position and a working position to distribute filaments between the winding stations (1.1-1.5). In order to enable the yarn to be laid on the guide roller (6) without any action on the operator's side, the yarn laying device (4) according to the invention has a rotatable engagement roller (8) in the region of the guide roller (6), which is designed to guide the yarn to be joined on the circumferential surface of the guide roller housing (6.1) between the engagement position and the working position.

Description

Technical Field

[0001] This invention relates to an apparatus for drawing and winding yarns in a melt spinning process. Background Technology

[0002] In melt spinning, the yarn produced in the form of filament sheets is drawn out, oriented, and subsequently wound into bobbins in parallel at the end of the process by guide rollers. This utilizes drawing and winding equipment, which, depending on the production process, has multiple guide rollers and multiple winding stations arranged below the guide rollers and jointly within the frame. Due to its low structural height and compact design, the operator can perform manual operations in a simple manner, especially at the beginning of the process. However, modern systems are fundamentally equipped with auxiliary devices to make operation easier for the operator. For example, to distribute the yarn of the filament sheets between winding stations and to allow the yarn to be introduced at the beginning of the process, the yarn is typically initially guided by a movable suction ejector so that it is picked up by the guide roller and distributed between the winding stations.

[0003] Such a general-purpose device is disclosed, for example, by DE102017004866A1. In this regard, multiple winding stations are arranged within a frame in a manner distributed along the driven winding spindle. A guide roller bracket, on which multiple guide rollers for drawing out the wire sheets are mounted, is supported on the top side of the frame. In the area between the guide rollers and the winding stations, a wire laying device with multiple movable guides is provided. Each guide can be guided within a guide rail between an engaged position and a working position for distributing the wire between the winding stations. For this purpose, the guides are fixed to the guide rail, but can be moved by the operator.

[0004] However, in principle, such equipment also includes a yarn laying device, in which the operator is further relieved of work because the guidance of the yarn guide in the guide rail between the engagement position and the working position can be controlled by an actuator. Such equipment is, for example, from WO2016 / 180679. Relatedly, the operator's work at the beginning of the process is limited to engaging the yarn sheets by simply looping a ring onto the guide roller housing before distribution between winding stations. Summary of the Invention

[0005] Therefore, the object of the present invention is to improve the device for drawing out and winding yarn in such a way that the yarn laying device also eliminates the need for operator work.

[0006] Another object of the present invention is to provide an apparatus for extracting and winding filaments, wherein the filament laying device allows for automated operation.

[0007] According to the present invention, this objective is achieved by having a movable engagement roller in the guide roller area, which can be guided between an engagement position and a working position for engaging the yarn on the circumferential surface of the guide roller.

[0008] A particular advantage of this invention is that, at the start of the process, only a simple linear motion is required by the filament guide via the suction gun to keep the filament sheet ready to be received by the filament laying device. To join the filament on the circumferential surface of the guide roller housing, a rotatable engagement roller is provided, which can be guided between the engagement position and the working position. Undesirable increases in filament tension can be avoided by the engagement roller even with relatively large filament deflections. The filament sheet remains stable by the suction gun's pick-up and delivery because virtually no additional filament friction is generated by the rotatable engagement roller.

[0009] To pick up the yarn in the guide roller area, the following improvement to the device of the present invention has proven particularly successful, in which the joining roller is guided by a sliding guide groove on the guide roller bracket along a movement path intersecting the tangent of the guide roller housing. Therefore, the yarn sheet can be guided along the side of the guide roller in a straight yarn direction, thereby the joining roller automatically picks up the yarn sheet during the guidance along the movement path.

[0010] Therefore, the engagement roller is held in the engagement position without contacting the wire and in the working position with contacting the wire. The engagement of the wire sheet to the guide roller housing circumferential surface is thus ensured by the movement of the engagement roller along the motion path. Once the engagement roller has reached the working position, the wire is engaged to the guide roller housing.

[0011] Depending on the yarn fineness and the number of yarns guided by the joining roller for joining, the joining roller is configured on the carriage in a rotatable manner and / or in a manner that can be driven by a drive motor. Therefore, finer yarns can also be joined by a driven joining roller. In this case, the joining roller can already be driven by a motor in the joining position. However, alternatively, the motor of the joining roller can be actuated only in the working position to drive the joining roller.

[0012] The carriage used to move the coupling roller is preferably guided by a controllable linear drive mechanism. The actuation of the linear drive mechanism to begin operation via the coupling roller joint can be manually triggered by the operator or automatically actuated by a timer.

[0013] To ensure sufficient cohesion of the filaments formed from numerous synthetic filaments before winding, it is generally known to interlock them using air pressure. In this regard, it is preferable to implement the following improvement of the invention, in which the interlocking device is held on a guide roller support and the filaments are guided into the interlocking device by the movement of the joining rollers. Therefore, no additional auxiliary devices are required to join the filament sheets to the guide rollers and the interlocking device at the start of the process.

[0014] In this regard, it is preferable to implement the following arrangement, in which the winding device is arranged in the yarn path between the joining roller and one of the guide rollers held in the working position. The joining roller, together with the downstream guide roller, spans the yarn path in which the winding device is arranged.

[0015] To achieve a compact arrangement of the yarn laying device even with multiple winding stations, the yarn guide is housed in a vertical guide section of the guide rail, which is laterally positioned adjacent to the engagement roller held in the engagement position. This allows for free space within the winding position area, which is necessary for removing a full roll.

[0016] In order to distribute the wire between the winding stations, the vertical guide portion of the guide rail is connected to the horizontal guide portion along the winding spindle, and the wire guide can be guided in the horizontal guide portion to distribute the wire between the winding stations.

[0017] To achieve the prescribed guidance of the threads within the filament sheet at a predetermined thread spacing, the following improvement of the present invention has proven successful, wherein a freely rotatable fixed guide roller is provided for guiding the threads, which is assigned to a guide held in an engagement position to separate and engage the threads. The guide roller allows for the creation of a convergence point and, consequently, a predetermined distance from the guide's receiving position, resulting in the separation of the threads within the filament sheet.

[0018] To automate the joining process using the yarn laying device, the following improvement of the invention is particularly advantageous: a guide roller is arranged downstream of the guide roller housing, and the yarn movement plane of the yarn in the area between the joining position and the working position of the joining roller, and also between the joining position and the working position of the guide roller, is spanned by the guide roller housing and the guide roller. Therefore, the actuation of the joining roller and the actuation of the guide roller to join and distribute the yarn can be triggered synchronously or with a delay to obtain a brief joining time at the start of the process.

[0019] For automation purposes, an actuator is assigned to one of the outer wire guides, thereby guiding the wire guides on the guide rails, where the wire guides are engaged with each other. The wire guides can then be automatically guided from the engaged position to their respective working positions.

[0020] The apparatus for drawing and winding yarn according to the invention is particularly suitable for automatically taking yarn sheets from the spinning device in a short time at the start of the process. Attached Figure Description

[0021] To further explain the present invention, embodiments of the apparatus for drawing and winding yarn according to the present invention will now be explained in more detail with reference to the accompanying drawings, wherein:

[0022] Figure 1 A side view schematically illustrates an embodiment of a device for drawing and winding yarn according to the present invention.

[0023] Figure 2 schematically shown Figure 1 Front view of an embodiment,

[0024] Figures 3.1 to 3.3 This schematically illustrates various working conditions within the yarn laying device. Figure 1 Side view details of the embodiment,

[0025] Figure 4 schematically shown Figure 3.1 Rear view of the guide roller bracket of an embodiment. Detailed Implementation

[0026] exist Figure 1 and Figure 2 The following diagram schematically illustrates an embodiment of the apparatus of the present invention for drawing out and winding a plurality of filaments. This embodiment is used in a melt spinning process to draw freshly extruded filaments from a spinning device and subsequently wind each filament of a filament sheet to form a bobbin. Relatedly, Figure 1 This embodiment is shown in a side view. Figure 2 The previous view illustrates this embodiment. Unless one figure is explicitly mentioned, the following description applies to all figures.

[0027] In this embodiment, the apparatus for extracting and winding yarn according to the invention comprises five winding stations 1.1 to 1.5, arranged adjacent to each other in the frame 3. The winding stations 1.1 to 1.5 are arranged along winding spindles 14 held in a projecting manner. In each winding station 1.1 to 1.5, the respective yarn of the yarn sheet 2 is wound into a bobbin 26, wherein the bobbins 26 are held adjacent to each other on the winding spindle 14. The number of winding stations 1.1 to 1.5 and the number of yarn sheets 2 are exemplary in this case. In principle, such an apparatus could include up to 16 winding stations.

[0028] Winding stations 1.1 to 1.5 have the same configuration and all have a traverse unit 13. Each traverse unit 13 includes a guide mechanism (not shown in more detail here) to guide the yarn assigned to winding stations 1.1-1.5 back and forth within a laying stroke. The traverse unit 13 may be formed, for example, by a reversible threaded rod traverse mechanism, a belt-type traverse mechanism, or a spindle traverse mechanism.

[0029] For parallel winding of the yarn sheet 2, each winding station 1.1 to 1.5 is provided with a winding bobbin 16 on the circumferential surface of the driven winding spindle 14. For this purpose, the winding bobbin 16 is clamped on the circumferential surface of the winding spindle 14. In this case, the winding spindle 14 extends through all winding stations 1.1 to 1.5, so that the yarn is wound into bobbins 26 in parallel at winding stations 1.1 to 1.5.

[0030] To place the yarn onto the surface of the bobbin 26, a pressure roller 12 is provided, extending parallel to the winding spindle 14 and thus assigned to winding stations 1.1 to 1.5. The pressure roller 12 is positioned in the area between the traverse unit 13 and the winding spindle 14. The winding spindle 14 is mounted protrudingly on a winding turntable 15 rotatably held in the frame 3. The winding turntable 15 holds a second winding spindle 14, which is arranged 180° offset relative to the first winding spindle 14. Rotation of the winding turntable 15 allows the two winding spindles 14 to be alternately guided to the winding area and the changeover area, so that the yarn 2 can be continuously wound into the bobbin 26 in winding stations 1.1-1.5. Both the winding spindle 14 and the winding turntable 15 are engaged with a drive mechanism (not shown here).

[0031] In the end region of the frame 3, the guide roller bracket 5 is arranged above the traverse unit 13. The guide roller bracket 5 is supported on the frame 3. Two guide rollers 6 are arranged on the guide roller bracket 5. In this case, each guide roller 6 has a guide roller housing 6.1 protruding from the front side of the guide roller bracket 5 and a guide roller drive mechanism 6.2 arranged on the rear side of the guide roller bracket 5. Above the guide rollers 6, a yarn collecting device 25 is arranged on the guide roller bracket 5. The yarn collecting device has a suction removal unit 25.1 and a yarn collector 25.2.

[0032] In addition, the winding device 7, which has its own processing channel for each filament 2, is held on the guide roller bracket 5.

[0033] In order to connect the wire to the guide roller and enter the winding station 1.1 to 1.5 at the beginning of the process, a wire laying device 4 is provided, which has a movable connecting roller 8 on the guide roller bracket 5 and a movable wire guide 17 above the winding station 1.1 to 1.5.

[0034] To explain the thread laying device 4, also refer to Figures 3.1 to 3.3 . Figures 3.1 to 3.3 This shows the various operating conditions of the thread laying device 4. Figure 1 A side view detail of the embodiment. Also, refer to... Figure 4 It is shown in Figure 3.1 The rear side of the guide roller bracket 5 under the working condition shown.

[0035] The engaging roller 8 protrudes parallel to the guide roller housing 6.1 on the front side of the guide roller bracket 5. The engaging roller 8 is held on the carriage 10 in a rotatable manner. The carriage 10 is guided in the sliding guide groove 9. The sliding guide groove 9 extends between the guide rollers 6 such that the engaging roller 8 can be guided along a movement path intersecting the tangent of the guide roller housing 6.1.

[0036] As from Figure 4 As shown in the diagram, the carriage 10 is connected to the linear drive mechanism 11. The linear drive mechanism 11 can be controlled by a control device (not shown here) to guide the engagement roller 8 back and forth between the engagement position and the working position. In this case, the linear drive mechanism 11 is exemplified as a spindle drive mechanism connected to the carriage 10 via a spindle 11.1. The engagement position and working position of the engagement roller 8 are both located within the end area of ​​the sliding guide groove 9. A more detailed explanation of the function of the engagement roller 8 for engaging the wire sheet 2 to the guide roller housing 6.1 and the winding device 7 is given below.

[0037] In addition, the guide roller drive mechanism 6.2 of the guide roller 6, as well as the suction connector 25.3 and the wire collector drive mechanism 25.4 of the wire collecting device 25, are arranged on the rear side of the guide roller bracket 5. The wire collector 25.2 can be actuated by the wire collector drive mechanism 25.4 to collect the wire pieces in the event of wire breakage and supply them to the suction removal unit 25.1.

[0038] To separate and distribute the yarn sheets 2, the yarn laying device 4 has a separate yarn guide in the form of a deflecting roller 17 for each winding station 1.1 to 1.5. Each yarn guide 17 is held on a guide rail 18 by a movable yarn guide slide 19. The guide rail 18 is arranged in the upper region of the frame 3 and extends along the winding spindle 14 with a horizontal guide portion 18.1. Following the horizontal guide portion 18.1 is an arcuate guide portion 18.2 of the guide rail 18, which extends toward the operating end beyond the spindle end of the winding spindle 14. Following the arcuate guide portion 18.2 is a vertical guide portion 18.3, which is oriented at approximately 90° offset from the horizontal guide portion 18.1 of the guide rail 18. A first stop 21 is formed on the guide portion 18. of the guide rail 18. A second stop 21 is provided on the opposite free end of the horizontal guide portion 18.1 of the guide rail 18. The wire guide 17 can then be guided back and forth between the working position and the engaged position via the movement of the wire guide slide 19 along the guide rail 18. For this purpose, one of the outer wire guide slides 19 is engaged with an actuator (not shown here). The actuator used may, for example, be a cylinder without a piston rod for displacing the wire guide 17 between its engaged and working positions. Similarly, the actuator may also be implemented by a linear electric drive mechanism that extends parallel to the guide rail 18 and moves the associated wire guide slide 19.

[0039] As from Figure 3.3 As shown in the diagram, the guide slide 19 is connected by a flexible belt 20. The length of the flexible belt 20 is set such that, in the pulled-out state, each guide slide 19 is in the working position of the corresponding guide 17 in winding stations 1.1 to 1.5. The guides 17, configured in the form of deflection rollers, all form the ends of the traverse triangles generated during the yarn guidance process by the traverse unit 13 when winding the bobbin in their working positions. The deflection rollers 17 thus form the yarn inlets to their respective winding stations 1.1 to 1.5 in their working positions.

[0040] In order to engage the yarn sheet 2 with the guide roller 6 and the winding stations 1.1 to 1.5 at the beginning of the process, the yarn 2 is guided by a suction gun 24. The suction gun 24 can be guided by an operator or an automated operating device. In this case, the yarn sheet drawn from the spinning device is continuously fed to the waste yarn box via the suction gun 24. The yarn sheet is then held on the freely rotatable guide roller 22 through the suction chamber 24. The guide roller 22 is arranged at the end of the frame 3 such that the plane of yarn movement generated by the yarn sheet 2 extends as far as the guide roller 22 from the circumferential surface of the guide roller housing 6.1. This arrangement is in... Figure 3.1The image is shown in the diagram. In this case, the engagement roller 8 is held in the engagement position laterally adjacent to the yarn movement plane without contacting the yarn. Similarly, the yarn guide 17 is held substantially in the vertical guide portion 18.3 of the guide rail 18 laterally adjacent to the yarn movement plane of the yarn sheet 2. The yarn laying device 4 is then prepared for engaging the yarn sheet onto the guide roller housing 6.1 and separating and distributing the yarn sheet between winding stations 1.1 and 1.5.

[0041] In manual operation, the operator executes control commands via the operator control panel 23 to actuate the linear drive mechanism 11, causing the joining roller 8 to move. The joining roller 8 moves within the sliding guide groove 9 and automatically collects the yarn sheet 2. The joining roller 8 creates yarn loops within the yarn sheet until it reaches the working position. In the working position of the joining roller 8, the yarn sheet 2 is guided on the circumferential surface of the guide roller housing 6.1. Furthermore, the yarn 2 is automatically guided into the processing channel of the winding device 7. This process is as follows: Figure 3.2 The coupling roller 8 is shown in the diagram. It is locked and held in the working position. The coupling roller 8 is preferably rotatable. However, it can also be driven by a motor. The motor can be fixed to the carriage 10 at the rear of the guide roller bracket 5. The drive mechanism of the coupling roller 8 can then be actuated in the coupling position, causing the coupling roller 8 to be driven during the formation of the yarn loop.

[0042] To distribute the yarn 2 between independent winding stations 1.1 and 1.5, an actuator (not shown here) is actuated to displace the guide slide 19. This actuation can be achieved via an operator's additional handle or, alternatively, in a time-controlled manner after the engagement roller linear drive mechanism is actuated. In the drawing plane, the guide rollers or deflector rollers 17 can be guided from the engagement position into the working position in a staggered manner, such that the yarns are separated and each deflector roller 17 receives its respective yarn. The guide roller 22 has guide grooves on its circumferential surface that form yarn convergence points. The yarn 2 then moves from the circumferential surface of the guide roller housing 6.1 to the guide roller 22 in a similar radial manner. This establishes a predetermined yarn spacing within the deflector roller 17 region of the yarn sheet. Once the guide wire 17 has reached the working position in winding stations 1.1 to 1.5, the yarn sheet 2 is transferred to an auxiliary device (not shown in more detail here) via the suction gun 24 so that the yarn 2 can be grasped in winding stations 1.1 to 1.5 and winding of the yarn 2 can begin. The suction gun 24 can be operated by an operator in this case or, alternatively, guided by an automated operating device. In this respect, the apparatus for extracting and winding yarn according to the invention is particularly suitable for achieving fully automated process control.

Claims

1. An apparatus for drawing and winding yarn in a melt spinning process, the apparatus comprising a guide roller bracket (5) for accommodating at least two guide rollers (6), a frame (3) for accommodating a plurality of winding stations (1.1-1.5) distributed along a drivable winding spindle (14), and a yarn laying device (4) having a guide (17) at each winding station (1.1-1.5), the guide rollers (6) having a driven guide roller housing (6.1), the guides (17) being guided between a joining position and a working position for distributing yarn between the winding stations (1.1-1.5), characterized in that, The thread laying device (4) has a rotatable engagement roller (8) in the region of the guide roller (6). The engagement roller can be guided between an engagement position and a working position in order to engage the thread on the circumferential surface of the guide roller housing (6.1). The engagement roller (8) can be guided along a movement path intersecting the tangent of the guide roller housing (6.1) of the guide roller (6) via a sliding guide groove (9) on the guide roller bracket (5). The engagement roller (8) is held in the engagement position to not contact the thread (2) and in the working position to contact the thread (2). The thread sheet can be guided along the side of the guide roller in a straight thread direction, so that the engagement roller automatically picks up the thread sheet during the guidance along the movement path.

2. The device according to claim 1, characterized in that, The joining roller (8) is configured on the carriage (10) in a rotatable and / or motor-driven manner.

3. The device according to claim 2, characterized in that, The carriage (10) can be guided in the sliding guide groove (9) by a controllable linear drive mechanism (11).

4. The device according to claim 1, characterized in that, The winding device (7) is held on the guide roller bracket (5), and the wire (2) can be threaded into the winding device (7) by the movement of the connecting roller (8).

5. The device according to claim 4, characterized in that, The intertwining device (7) is arranged in the direction of the yarn between the joining roller (8) held in the working position and one of the guide rollers (6).

6. The device according to claim 1, characterized in that, The wire guide (17) is held in the engagement position in the vertical guide portion (18.3) of the guide rail (18), which extends laterally adjacent to the engagement roller (8) held in the engagement position.

7. The device according to claim 6, characterized in that, The guide rail (18) has at least one horizontal guide portion (18.1) along the winding spindle (14), the horizontal guide portion being connected to the vertical guide portion (18.3).

8. The device according to claim 1, characterized in that, A fixed guide roller (22) capable of free rotation is provided for guiding the filaments. The fixed guide roller (22) is assigned to the guide (17) held in the engagement position to separate and engage the filaments.

9. The device according to claim 8, characterized in that, The fixed guide roller (22) is arranged downstream of the guide roller housing (6.1), and the yarn movement plane of the yarn in the area between the engagement position and the working position of the engagement roller (8) and also between the engagement position and the working position of the guide (17) can be crossed by the guide roller housing (6.1) and the fixed guide roller (22).

10. The device according to claim 6, characterized in that, wherein An external wire guide is provided with an actuator by means of which the wire guide (17) can be guided on the guide rail (18), wherein the wire guides (17) are engaged with each other.

11. The device according to claim 1, characterized in that, The guide (17) of the thread laying device (4) is formed by a deflection roller that can rotate freely.

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