Warping apparatus and method for creating fractional warps in a sheet of yarn

Abstract

The invention relates to a beaming device and a method for producing a divided warp in a yarn sheet, in particular a beaming device with a beaming cylinder, a yarn sheet supply path and a dividing device (1), wherein the dividing device (1) has a shed-forming device in the yarn sheet supply path and a dividing thread insertion device (8) with which a dividing thread (5, 10) can be inserted into a shed (4, 9) formed by the divided yarn sheet (2, 3). It is intended to achieve a high production rate of the beaming machine. To this end, a dividing thread engagement device (12, 13) is arranged laterally next to the yarn sheet path.

Description

Technical Field

[0001] The present invention relates to a warping device having a warping cylinder, a yarn feeding path, and a warping separation device. The warping device has a shuttle forming device and a splitting thread inserting device in the yarn feeding path, wherein the splitting thread inserting device can insert the splitting thread into the shuttle formed by the separated yarn.

[0002] Furthermore, the present invention relates to a method for generating warp threads in a yarn sheet, wherein a first shuttle is formed by separating the yarn sheet, a splitting thread is inserted into the first shuttle by a splitting thread inserting device, a second shuttle is formed by separating the yarn sheet, a splitting thread is inserted into the second shuttle by a splitting thread inserting device, and the splitting threads are connected to each other next to the yarn sheet. Background Technology

[0003] In the case of warping yarn into kette, the fadenschar is typically formed by simultaneously pulling a predetermined number of yarns from a spool and arranging them in a roving. These yarns are guided by a gereseblatt, and if possible, another gereseblatt, and maintained in a predetermined order. The yarns thus categorized are wound onto a warping bobbin. At predetermined intervals, typically approximately 500 to 2000 meters of travel length, the gereseblatt is introduced into the fadenschar. This is achieved by forming a first shuffle, for example, by lifting each second yarn of the fadenschar, so that the alternately arranged side-by-side yarns are spaced at a distance perpendicular to the fadenschar. The kerf is then inserted into this first shuffle. The second shuttle is then formed in such a manner that the previously unlifted yarn is lifted, while the previously lifted yarn remains in its unlifted position. A splitting thread is then inserted into this second shuttle. The two splitting threads are connected to each other so that they secure the yarn within the yarn sheet relative to each other.

[0004] In the process of generating warp points, the warping bobbin must be stopped. The warping process must be interrupted. The time required for generating warp points is not used for winding, i.e., the actual generation of warp yarns.

[0005] As known from DE 42 23 700 C or similar DE 44 43 627 C2, a twisted wire insertion device is used to insert the twisted wire. However, an operator is always required, and this operator is not always available, so the warping process can only continue after the operator's intervention, which may include time loss. Summary of the Invention

[0006] This invention aims to achieve high productivity in warping machines based on the following objectives.

[0007] This task is solved in the type of warping device mentioned at the beginning by having a splitting and joining device arranged laterally next to the yarn path.

[0008] The use of a splitting wire splicing device automates the connection of splitting wires after insertion, thus automating the entire generation of warp threads in the yarn. One or more splitting wires are automatically introduced into the shuttle in the yarn and automatically connected to each other after being guided through the yarn. Therefore, operators are no longer needed for the connection, thus saving waiting time. The requirements for operator qualifications are also only slightly lower.

[0009] In a preferred design, the twisted wire splicing device is configured as a twisted wire knotting device. The twisted wire knotting device can knot the twisted wires together, thereby creating a reliable connection between the twisted wires.

[0010] In a preferred design, the position of the twist-joining device along a direction perpendicular to the yarn's travel direction can be set within the yarn path. Therefore, the position of the twist-joining device can be matched to the width of the yarn. This minimizes material consumption for the twist-joining thread. The twist-joining thread must be made only slightly longer than the width of the yarn.

[0011] Preferably, the twisting and joining device can be positioned using a yarn edge recognition device. Therefore, the positioning of the twisting and joining device can also be automated. The setup process can be performed quickly and accurately from the outset.

[0012] Preferably, the yarn feeding device includes: a first gripper movable into the shuttle from a first side; and a second gripper movable into the shuttle from a second side opposite to the first side. In this design, it is not necessary for the yarn feeding device to grip the entire width of the yarn sheet.

[0013] Alternatively or additionally, the stranding wire insertion device may be configured to have an air blowing device and / or an air suction device. The stranded wire can then be transported through the shuttle by means of air.

[0014] Preferably, a strand holding device is arranged on at least one side of the yarn path, the strand holding device having two clamping devices on a carrier that can rotate about an axis arranged between these clamping devices. The operation of such a strand holding device can be described, for example, as follows: the strand is pulled down from the spool and placed into the two clamping devices. The section of the strand between the two clamping devices is then loaded to place the strand into the shuttle. Here, in the first half of the movement, the clamping device adjacent to the spool releases. The other clamping device remains fixed. When the strand has reached the middle of the shuttle in the width direction of the yarn, the clamping device adjacent to the spool activates and then holds the strand, while the other clamping device releases, allowing the free end of the strand to be guided through the shuttle. Once the strand has been guided through the yarn, it splits on the side of the clamping device opposite to the spool. Of course, when the carrier rotates 180°, the initial position described above is re-established. Similarly, the preparation of the strand can then be automated.

[0015] Preferably, the position of the twist-holding device can be set in the yarn path in a direction perpendicular to the yarn's travel direction. Similarly, the twist-holding device can then be matched to the width of the yarn.

[0016] Preferably, the yarn splitting and knotting device has a yarn gripper rotatable around a bushing, which acts on the end section of the split yarn to be knotted, wherein the bushing has a longitudinal slit and an air suction pipe is arranged in the bushing, the air suction pipe generating negative pressure in the region of the longitudinal slit and being movable. The yarn gripper guides the ends of two split yarns to be knotted around the bushing. The air suction pipe draws these ends through the longitudinal slit and, as the air suction pipe moves, it pulls these ends through the loop already formed around the bushing. This results in a knot.

[0017] Preferably, the warping spool is connected to a control device that also controls the warping device, wherein the control device stops the warping spool at different angular positions during different strand insertion processes. This avoids the accumulation of strands on the warping spool at winding angles that are multiples of 360°. Such accumulation would, for example, lead to increased imbalance and thus impair winding speed. Therefore, higher productivity can be maintained.

[0018] The present invention also solves this problem by means of the type of method mentioned at the beginning, namely, the twisted wires are connected to each other by a twisted wire bonding device.

[0019] Therefore, the time required to generate the warp threads can be kept relatively short. There is no longer a need to wait for operators to connect the twisted wires. Similarly, the consistent quality of the warp threads can be ensured at all times.

[0020] Preferably, a twisted wire knotting device is used as the twisted wire splicing device. Therefore, the connection between the twisted wires can be achieved by knotting. Knotting provides a reliable connection.

[0021] Preferably, the position of the stranding device is matched to the width of the yarn sheet. This keeps the material consumption for the strands low, which appropriately reduces costs.

[0022] Preferably, the edge of the yarn is acquired by a yarn edge recognition device, and the position of the twisting and joining device is set according to the output signal of the yarn edge recognition device. This also automates the matching of the twisting and joining device to the corresponding width of the yarn.

[0023] Preferably, the warp roller is stopped at different angular positions to generate warp points. This avoids the accumulation of warp points on the warp roller at winding angles that are multiples of 360°. Attached Figure Description

[0024] The present invention is described below with reference to a preferred embodiment and in conjunction with the accompanying drawings. Wherein:

[0025] Figures 1a-1d A schematic diagram of the generation of the warp is shown.

[0026] Figure 2 The twisted wire holding device is shown in top view.

[0027] Figure 3 The twisted wire holding device is shown in a side view.

[0028] Figure 4 A side view of the stranded wire insertion device is shown.

[0029] Figure 5 The twisted wire insertion device is shown in top view.

[0030] Figure 6 A side view of a twisted wire knotting device is shown, and

[0031] Figure 7 A top view of the stranding and knotting device is shown. Detailed Implementation

[0032] Figures 1a-1d A warping device 1 for generating warp threads in a yarn sheet is schematically shown. The yarn sheet has a first group of first yarns 2 and a second group of second yarns 3. The first yarns 2 and the second yarns 3 are arranged alternately. The yarns 2 and 3 together form the yarn sheet. The yarns extend perpendicular to the plane of the drawing.

[0033] Yarns 2 and 3 are pulled down from the roving frame and arranged in an unpresented roving frame, and wound onto the warping bobbin, which is also unpresented. The warping separator 1 is located between the roving frame and the warping bobbin, preferably more closely at the warping bobbin than at the roving frame.

[0034] Yarns 2 and 3 are guided through a warp reed, also not shown in more detail, which is also called a distribution reed. The warp reed separates yarns 2 and 3 from each other, so that the first yarn 2 is in a raised position, while yarn 3 is in a stationary or lowered position. This forms the shuttle 4, into which the split yarn 5 can be inserted.

[0035] Figure 1a As shown, the first yarn 2 and the second yarn 3 are separated from each other and form a shuttle 4.

[0036] The stranded wire 5 is pulled down from the reel 6 and, if possible, passes through the pretensioner 7. Figure 2 It remains under a certain stress. The twisted wire 5 is inserted into the device 8 via the twisted wire insertion device (for one example in...). Figure 4 and 5 (Presented in the middle) is introduced into the shuttle 4. Once the twisted wire 5 has been guided through the shuttle 4 ( Figure 1b The shuttle 4 is closed. A second shuttle 9 is generated such that the first yarn 2 and the second yarn 3 are separated from each other again, but in opposite directions, so that the second yarn 3 is in a raised position while the first yarn 2 is in a lowered or stationary position. Then, the split yarn 10 is pulled down from the spool 11 from the other side and guided through the shuttle 9. The two split yarns 5 and 10 are then positioned sequentially in the yarn sheet with shorter travel distances, separating the first yarn 2 from the second yarn 3. Finally, the two split yarns 5 and 10 must be connected to each other. For this purpose, a first split yarn joining device 12 is arranged on the side of the yarn sheets 2 and 3, and a second split yarn joining device 13 is arranged on the opposite side.

[0037] Such warp divisions are introduced into yarn pieces 2 and 3 at predetermined intervals, typically within a travel length range of 500 to 2000 m.

[0038] The positions of the strand splicing devices 12 and 13 can be set in the yarn path along a direction perpendicular to the yarn's travel direction. (Regarding...) Figures 1a-1d In the view, the twisted wire joining devices 12, 13 can move left and right to match their position to the width of the yarn sheet formed by the yarns 2, 3.

[0039] In addition, one or more sensors may be provided, which form a yarn edge recognition device. The yarn edge recognition device can determine where the edge of the yarn formed by the yarns 2, 3 extends and accordingly set the position of the twisting yarn joining devices 12, 13.

[0040] The twisted wire 5 is prepared by the twisted wire holding device 14, which is based on Figure 2 and 3 A more detailed description follows. The twisted wire 10 is prepared by the twisted wire holding device 15, the structure of which corresponds to the twisted wire holding device 14 and is therefore not described in more detail.

[0041] The strand holding device 14 has a first clamping device 16 and a second clamping device 17, which are arranged on a common carrier 18. The carrier 18 is rotatable about an axis 19 and is arranged between the clamping devices 16 and 17. The first clamping device 16 is associated with a first separating device 20. The second clamping device 17 is associated with a second separating device 21. The two separating devices 20 and 21 are located between the two clamping devices 16 and 17.

[0042] The first clamping device 16 can be operated by the first actuator 22. The second clamping device 17 can be operated by the second actuator 23. The carrier 18 can be rotated by the rotary driver 24.

[0043] The splitter 5 only needs to be inserted into the two clamping devices 16 and 17 when a new splitter 5 is used. The section 25 of the splitter 5 between the two clamping devices 16 and 17 is then prepared for loading by the splitter insertion device 8 and movement through the first shuttle 4. In the first half of the movement, the first clamping device 16 is released, allowing the splitter 5 to be pulled down by the reel 6. Once the splitter has reached the middle of the width of the yarn sheet formed by the yarns 2 and 3, the first clamping device 16 is activated and holds the splitter 5 in place, while the second clamping device 17 is deactivated and releases the end of the splitter 5. The splitter 5 can then be fed through the shuttle 4 along its entire free length. Depending on the length of the twisted wire 5 required on the other side of the yarn to form a connection at the ends of the twisted wire, especially between knots, the activation of the first clamping device 16 and the deactivation of the second clamping device 17 can also be achieved slightly outside the middle of the width of the yarn, that is, before or after the twisted wire 5 has passed the middle of the width of the yarn.

[0044] Once the stranded wire 5 has been fed through the shuttle 4, the first separating device 20 is manipulated and cuts the stranded wire 5. As the carrier 18 then rotates 180°, the two clamping devices 16, 17 exchange their positions, so that the beginning of the stranded wire 5 is then held by the clamping device 16 and the stranded wire travels between the reel and the first clamping device 16 through the second clamping device 17.

[0045] Figure 4 and 5A possible implementation of the stranded wire insertion device 8 is shown. The stranded wire insertion device 8 is divided into a first section 26 and a second section 27. The first section 26 conveys the stranded wire 5 from the stranded wire holding device 14 into the shuttle 4. The first section 26 is driven by a driver 28. The first section 26 has a first gripper 29, which can be manipulated by an actuator 30 arranged in the first section 26. When the first section 26 moves into the shuttle 4, the first gripper 29 pulls it back behind the front edge 31 of the first section 26. The stranded wire 5 is carried by the front edge 31.

[0046] When the first section 26 has delivered the twisted wire 5 to the delivery position, approximately at the midpoint of the width of the yarn sheets 2 and 3 as mentioned above, the second section 27 takes action. The second section 27 has moved into the shuttle 4 via the drive 32. The second section 27 has a second gripper 33, which can be moved by the second actuator 34. The second gripper 33 then moves out of the second section 27 and can pick up the twisted wire 5. The twisted wire 5 is then pulled through the shuttle 4 together with the second section 27, so that the free end of the twisted wire 5 can finally leave the shuttle 4.

[0047] When the second stranded wire 10 is inserted, the process proceeds in the opposite direction. The stranded wire 10 is picked up through the front side 35 of the second section 27 and conveyed into the shuttle 9. In the delivery position, the first gripper 29 then picks up the stranded wire 9 and the stranded wire 10 is then fully pulled through the shuttle 9.

[0048] The shape presented by the strand insertion device 8 is merely exemplary. An airflow used to transport the respective strands 5, 10 through the respective shuttles 4, 9, or a single section 26 that moves through the entire shuttle 4, may also be used to insert the strand 5 into the shuttle 4. To insert the strand, the respective strand insertion device 8 travels after the shuttle 9 is formed until it reaches the strand 10, which it grasps and then pulls the strand 10 through the shuttle 9.

[0049] After inserting the two strands 5, 10, there are two free ends on the two wide sides of the yarn sheets 2, 3, which are knotted together by means of the strand joining devices 12, 13. The strand joining devices 12, 13 are preferably constructed as strand knotting devices. Figure 6 and 7 A twisted wire splicing device 12, configured as a knotting device, is shown. A twisted wire splicing device 13 is constructed exactly the same, thus saving on its own explanation.

[0050] The splitting yarn joining device 12, configured as a knotting device, has a yarn gripper 36 that can move around a bushing 37. As the yarn gripper 36 guides around the bushing 37, it positions the ends of the splitting yarns 5, 10 around the bushing 37. The bushing 37 is substantially cylindrical in shape and has a slightly tapered shape at its ends, where the splitting yarns 5, 10 are guided around it.

[0051] The bushing 37 has a longitudinal seam 38. An air suction tube 39 is arranged in the bushing 37, which generates negative pressure in the area of ​​the longitudinal seam 38. As indicated by arrow 40, the air suction tube 39 is movable.

[0052] As the yarn grabber 36 moves around the bushing 37 and the split yarns 5, 10 are guided around the bushing 37, the ends 41 of the split yarns 5, 10 are drawn into the longitudinal seam and, (because the suction tube 39 moves out of the bushing 37) pulled through the loops already formed around the bushing 37 by the yarn grabber 36. This forms a knot. The two yarns 5, 10 are thus automatically connected to each other.

[0053] As mentioned above, the positions of the twisted-thread-twisting-jointing devices 12, 13 can be changed relative to the yarn sheets 2, 3, wherein positioning can be automated when the yarn sheet edge recognition device acquires the edges of the yarn sheets 2, 3. Similarly, it is also possible that the twisted-thread holding devices 14, 15 can be positioned relative to the yarn sheets 2, 3, wherein this positioning can also be achieved automatically. Therefore, it is possible to keep the material consumption for the twisted threads 5, 10 relatively low.

[0054] Combination Figure 4 and 5 The described twisted wire insertion device 8 can also be used with an airflow generating device.

[0055] Furthermore, the thread inserting device 1 is synchronized with the warp roll. This synchronization can be achieved by arranging the thread inserts 5 and 10 at different positions along the periphery of the warp roll. Naturally, it is possible for two or more thread inserts or pairs to be positioned at the same periphery of the warp roll. On the other hand, the aggregation of the thread inserts 5 and 10 at the periphery of the warp roll is avoided.

Claims

1. A warping apparatus comprising a warping bobbin, a yarn path, and a warp separating device (1), the warp separating device having a shuttle forming device and a strand insertion device (8) in the yarn path, wherein strands (5, 10) can be inserted into shuttles (4, 9) formed by separated yarns (2, 3) by means of the strand insertion device, wherein a first strand joining device (12) is arranged laterally on one side beside the yarn path, characterized in that, A second stranding device (13) is arranged on the opposite side of the yarn path.

2. The warping device according to claim 1, characterized in that, The first twisted wire joining device (12) and the second twisted wire joining device (13) are configured as twisted wire knotting devices.

3. The warping device according to claim 1 or 2, characterized in that, The positions of the first twisted wire bonding device (12) and the second twisted wire bonding device (13) are set in a direction perpendicular to the direction of yarn travel in the yarn path.

4. The warping device according to claim 3, characterized in that, The first twisted wire bonding device (12) and the second twisted wire bonding device (13) can be positioned by means of a yarn edge recognition device.

5. The warping device according to claim 1 or 2, characterized in that, The twisted wire insertion device (8) includes: a first gripper (29) that can be moved into the shuttle (4,9) from a first side; and a second gripper (33) that can be moved into the shuttle (4,9) from a second side opposite to the first side.

6. The warping device according to claim 1 or 2, characterized in that, The stranded wire insertion device (8) has an air blowing device and / or an air suction device.

7. The warping device according to claim 1 or 2, characterized in that, A strand holding device (14, 15) is arranged at least on one side of the yarn path, the strand holding device having two clamping devices (16, 17) on a carrier (18) which can rotate about an axis (19) arranged between the clamping devices (16, 17).

8. The warping device according to claim 7, characterized in that, The position of the twisted yarn holding device (14, 15) is set in a direction perpendicular to the direction of yarn travel in the yarn path.

9. The warping device according to claim 2, characterized in that, The twisted yarn knotting device has a yarn grabber (36) rotatable around a bushing (37), the yarn grabber acting on the end section (41) of the twisted yarn (5,10) to be knotted, wherein the bushing (37) has a longitudinal seam (38) and an air suction pipe (39) is arranged in the bushing (37), the air suction pipe generating negative pressure in the region of the longitudinal seam (38) and the air suction pipe being movable.

10. The warping device according to claim 1 or 2, characterized in that, The warping cylinder is connected to the control device, which also controls the warping device (1), wherein the control device causes the warping cylinder to stop at different angle positions during different strand insertion processes.

11. A method for generating warp splits in a yarn sheet (2,3), wherein the yarn sheet is wound onto a warp roll, wherein a first shuttle (4) is formed by splitting the yarn sheet (2,3), a first splitting thread (5) is inserted into the first shuttle (4) through a splitting thread inserting device (8), the first shuttle (4) is closed, a second shuttle (9) is formed again by splitting the yarn sheet (2,3), a second splitting thread (10) is inserted into the second shuttle (9) through the splitting thread inserting device (8), and the first splitting thread (5) and the second splitting thread (10) are connected to each other beside the yarn sheet (2,3), characterized in that, The first strand (5) and the second strand (10) are connected to each other by a first strand joining device (12) on one side of the yarn (2,3) and by a second strand joining device (13) on the opposite side of the yarn (2,3).

12. The method according to claim 11, characterized in that, The twisted wire knotting device is used as the first twisted wire joining device (12) and the second twisted wire joining device (13).

13. The method according to claim 11 or 12, characterized in that, The positions of the first twisted wire joining device (12) and the second twisted wire joining device (13) are matched with the width of the yarn sheet (2,3).

14. The method according to claim 11 or 12, characterized in that, The edge of the yarn is obtained by the yarn edge recognition device, and the positions of the first twisted wire bonding device (12) and the second twisted wire bonding device (13) are set according to the output signal of the yarn edge recognition device.

15. The method according to claim 11 or 12, characterized in that, The warp roller is stopped at different angular positions in order to generate warp divisions.

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