Method And Device For Winding A Strip Consisting Of A Plurality Of Parallel Threads Onto A Drum Rotating About An Axis Of Rotation
The invention relates to a method for winding a strip (17) consisting of a plurality of parallel threads (18) onto a rotating warping drum (2), wherein the winding position of each individual thread is determined with the aid of a thread guide (21) which is associated with a thread selection device (8) and which is allocated to said thread. The thread guides (21) are displaced in the direction of the axis of rotation (6) of the warping drum (2) from a rest position into a working position and the individual threads (18) are seized successively by an internal thread carrier (30) associated with the warping drum (2).
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The invention relates to a method and a device for winding a strip consisting of a plurality of parallel threads onto a winding body rotating about an axis of rotation. Methods and devices of this type are used, for example, in the textile industry in weaving preparation for warping the warp. However, winding processes are also required in other sectors, such as, for example, in the wire industry. The present invention, then, is not restricted to just textile applications, and the expression “threads” covers any elongate windable element, irrespective of cross-sectional shape or of material.
One requirement in modern warping methods is, for example, that the work must be carried out at high speeds, while a change in the composition of each wound strip should be ensured. This requirement arises particularly in what are known as pattern warps or short warps. However, any changeover of the strip composition, whether in generic type or the sequence of the threads or in the wound strip width, requires a machine standstill, thus considerably delaying the work process.
An object of the invention, therefore, is to provide a method and device of the type initially mentioned, by means of which rapid strip changes or different strip compositions are possible at a high production speed. This object is achieved, in terms of method, by means of a method having the features according to claim 1 and, in terms of device, by means of a device having the features in claim 15.
In conventional warping machines, the threads are brought to the correct thread density and strip width even on the reed. This arrangement clearly makes any modification of the strip difficult. These disadvantages can be eliminated if the winding position of each individual thread on the winding body is defined by means of a thread guide assigned to this thread. The thread guides therefore replace the reed, although, in contrast to the latter, they can come into any desired positions. The thread guides can therefore preferably be adjusted in the direction of the axis of rotation out of a position of rest into a working position. The thread guides can consequently be used alternately and thus change, as desired, the composition of the strip to be wound.
Particularly advantageously, a thread group consisting of a plurality of threads, preferably of different generic type, is led up to a thread selection device arranged in the winding region of the winding body, individual threads of these being drawn off as working threads via the thread guides and forming the strip, while the remaining threads are held clampingly as stock threads on the thread selection device in each case by means of a clamping point. This procedure makes it possible to carry out the strip change while the winding body is rotating continuously, thus obviously speeding up the work process considerably.
Under these circumstances, it is advantageous if, after at least one first winding sequence, the working threads of the wound strip are separated and are held clampingly on the thread selection device, and if, in at least one second winding sequence, the working threads of the strip have a composition other than that during the first winding sequence. However, the composition of the strip may also be identical on a plurality of adjacent laps. Finally, it would also be conceivable that the threads of a strip are not separated after each winding sequence, but, instead, the strip is guided directly, at the end of one lap, to the start of an adjacent lap.
A thread transfer taking place during a full rotation of the winding body can be achieved particularly advantageously when the selected working threads are first tensioned by means of the thread guides into a take-up position above the winding body, in which position they are freely tensioned, approximately parallel to the axis of rotation, between the thread guides and a clamping point in each case, and in that, in the course of a rotation of the winding body, all the working threads in the take-up position are picked up successively by an inner thread driver assigned to the winding body and are thereafter separated from the clamping point. After separation from the clamping points, the thread guides, together with their working threads, can be moved into the strip winding position to the strip width. This flying transfer of the clamped stock threads as working threads onto the winding body can take place at high speeds and within a single rotation of the winding body.
After the build-up of a strip lap, once again, all the working threads can be picked up successively by an outer thread driver corotating synchronously with the winding body and can thereafter be clamped once again by the clamping point and at the same time separated from the thread guide. In practice, therefore, a flying return of the working threads into the standby position at the clamping points takes place again.
On a cone warping machine, it is clearly necessary, for the conical winding of the strip on a warping table, that the thread selection device is displaced in the direction of the axis of rotation or at right angles to this. The warping drum in this case forms the winding body.
Clearly, within the framework of a warping process, for the correct feed of the warp onto the beam, it is necessary to introduce dividing elements into the composite thread structure. In conventional methods, as a rule, the insertion of dividing elements always requires a machine standstill. In the method according to the invention, this disadvantage can be avoided in that, at the start of a strip lap, a shed is formed with at least some of the threads at least one location on the winding body, while the winding body is rotating, and in that a dividing element is introduced into the open shed. Alternatively, however, the shed may also be formed by means of shedding combs which are arranged on an inner ring corotating synchronously with the winding body and surrounding the latter. Such thread division may preferably serve for forming a lease. Such a lease makes further processing, for example in the weaving mill, easier at a later stage. Thus, shedding, in particular leasing, and the introduction of the dividing element at full working speed also take place in a similar way to the flying take-over of the working threads onto the winding body. In specific instances, it would be conceivable to employ this type of shedding even in conventional methods in which not every individual thread is deposited via an individual thread guide.
Particularly advantageous shedding arises when, to beat up the lease, at least two shedding combs arranged on the winding body one behind the other with respect to the circumferential direction are moved out of a position of rest approximately tangential to the outer circumference into a shedding position in which the comb ends project radially away from the outer circumference, and, in the course of a rotation of the winding body, the threads are preferably deposited alternately onto comb ends and between the comb ends. The shedding combs can in this case be moved relatively simply with a part rotation into their working position. This method, however, may, of course, also be used for sizing division. Leasing is not involved here, but, instead, the threads are to be kept apart from one another. For sizing division, a plurality of shedding combs arranged on behind the other are arranged in such a way that a shed is formed in each case for only individual threads. If sizing division is additionally provided, this preferably takes place before leasing.
Clearly, shedding and the introduction of the dividing element take place before the strip winding position is assumed, the thread guides first being moved to a reading in position for depositing the threads onto the shedding combs. In this reading in position, the threads lie less closely to one another than in the later strip winding position.
Preferably, a crossing rod is first introduced into an open shed, the shedding comb which forms the respective shed thereafter being moved into the position of rest again, and, lastly, the threads divided by the crossing rod being stripped off onto a dividing element, preferably onto a dividing cord or a dividing band. The dividing cord or the dividing band is therefore not actually drawn into the shed, but, instead, the threads are transferred to the dividing cord or the dividing band.
Likewise, at the end of a strip lap, a lease for shedding can be beaten up with at least some of the threads at least one location on an outer ring rotating synchronously with the winding body and surrounding the latter, a dividing element being introduced into the open shed, and shedding preferably taking place by similar means, that is to say by means of shedding combs, to those at the start of the strip lap.
A plurality of strip laps having an identical or a different thread repeat can thus be wound onto the winding body one against the other or next to one another, the winding body rotating uninterruptedly.
In terms of the device, it is expedient if in each case a thread guide and clamping point are assigned to a thread guide module which has a mechanism for adjusting the thread guide and a movable clamping/cutting unit with a clamping point for clamping the thread and with a cutting device for separating the thread. The cutting and clamping of the threads thereby take place virtually at the same location, thus making it possible to have the flying thread change while the winding body is rotating.
The mechanism of the thread guide module is preferably a traction mechanism with a traction means, in particular with a toothed belt on which the thread guide is arranged in such a way that it can be moved over a thread guide distance approximately parallel to the axis of rotation of the winding body. The traction mechanism can be moved very quickly and accurately, for example, by means of a stepping motor. Other types of mechanism would also be conceivable, however, for example a push rod, on the end of which the thread guide is arranged.
The clamping/cutting unit can be mounted movably, approximately at right angles to the thread guide distance, in such a way that the clamping point is displaceable with respect to the winding body circumference between a radially outer position of rest and a radially inner thread transfer position. This stroke movement may be performed, for example, via a pneumatic pressure medium cylinder.
Further advantages and refinements of the invention may be gathered from the following description of an exemplary embodiment and from the drawings in which:
As is evident from
The thread selection device curves around the surface of the warping drum 2 over a segment of, for example, 90°. A multiplicity of thread guide modules 20, illustrated merely diagrammatically here, are arranged closely in succession in the circumferential direction on the thread selection device. A thread group 9 is drawn off from a bobbin creel or from another thread dispenser device, not illustrated in more detail here, each individual thread being guided to one of the thread guide modules 20. Suitable devices, such as, for example, thread brakes, ensure that the threads remain constantly tensioned.
For shedding in order to produce leases or for sizing division at the start of a lap, an inner ring 12 is arranged on the cylindrical portion 3 of the warping drum 2, carries the means for leasing or for sizing division and rotates together with the drum. The inner ring 12 is guided in drum longitudinal grooves 13 and can be displaced along these, in the same way as the warping table 7, in the direction of the arrow c.
For shedding, in particular for leasing at the end of a lap, an outer ring 14 is provided which surrounds the drum casing concentrically and which can be driven synchronously with the drum. The outer ring is mounted in an outer-ring bearing 15 which, in turn, is supported on an outer-ring slide 16 and is displaceable linearly on the latter in the direction of the arrow c. The outer ring 14, too, carries the means required for leasing.
The components for controlling the warping machine are accommodated in a control cabinet 10.
An individual thread guide module 20 is described in somewhat more detail with reference to FIGS. 4 to 6. The module has a holding plate 32, to which a mechanism unit 33 and a clamping/cutting unit 22 are attached. The mechanism unit has a traction mechanism with a toothed belt 29. The toothed belt can be driven via a thread guide drive 34 which is preferably a stepping motor. Fastened to one of the two parallel toothed belt strands is a thread guide 21 which can cover a thread guide distance FS in the direction of the arrow e. In the position of rest RS, the thread guide 21 is set back behind the clamping/cutting unit. The clamping/cutting unit 22 is arranged on a lifting slide 26 which is mounted displaceably in a guide 35. The drive means is in this case a pneumatic pressure medium cylinder 28.
The clamping/cutting unit has a double lever arm 25 which is articulated on the lifting slide 26 and the upper lever arm of which can be activated via a pneumatic pressure medium cylinder 27. The actual cutting device 24 is formed on the lower lever arm by a cutting edge. Directly behind the cutting plane lies a clamping point 23 which can likewise be activated via the double lever arm 25.
The working thread supplied or the stock thread 18/19 is introduced via a thread guide tube 36 which issues on the side of the double lever arm above the clamping point 23 in such a way that the thread lies on the thread guide distance of the thread guide 21. The thread guide has a notch or flute which prevents the thread from slipping away.
For a clearer understanding of the following functional description of the thread guide module 20, the inner thread driver 30 assigned to the drum is also illustrated in
As long as a thread is clamped to a thread guide module in the initial position illustrated in
Immediately after the thread has been reliably picked up, the clamping point 23 is released, so that the working thread is drawn off by the circumferential speed of the inner thread driver 30. This situation is illustrated in
After this, according to
As soon as the end of a strip lap is reached and as soon as leases are also formed there by similar means, all the active thread guides 21 move once again to an outer thread take-up position FM, in which all the working threads 18 are transferred to an outer thread driver 31 or are carried along by the latter. This outer thread driver is assigned to an outer ring 14 which surrounds the drum concentrically and corotates synchronously with the drum and which is illustrated merely symbolically in
The lifting slide 26 is in this case moved on each thread guide module 20 into the upper end position, so that the clamping point 23 can pick up the drawn-off thread. The cutting device 24 is activated virtually simultaneously, the working thread 18 just processed being freed from the thread guide 21 and at the same time being held in a position of readiness as a stock thread 19 at the clamping point.
As is evident from
Further details of a shedding means are evident from
The extended crossing rod 43 thus grips the dividing cord sleeve 44 which is fixed in the sleeve mounting 45 and, moreover, has about the same outside diameter as the crossing rod. The sleeve mounting 45 is subsequently opened, so that the entire circumferential region of the dividing cord sleeve 44 is exposed. This makes it possible to strip off the divided composite thread structure from the crossing rod 43 onto the drawn-off dividing cord 49.
This purpose is served by a thread stripper 48 which is illustrated in
As soon as all the active working threads have been read in into the shedding comb, according to
This situation is illustrated in
Shedding at the end of a lap takes place by similar means to those at the lap start, that is to say likewise by means of shedding combs. As already mentioned initially, these shedding combs are assigned to the outer ring 14, the diameter of which is dimensioned such that it is larger than the largest possible lap diameter. Contrary to the situation at the lap start, however, the dividing element is not a dividing cord, but a flexible dividing band introduced into the open shed, the design of the shed dividing means and the method steps not being the same as on the inside. According to
According to
In a next step according to
As soon as the stripping sleeve 57 covers the last travel distance, the upper threads 53 fall onto the finished lap, but outside the dividing band 54 (
A complete winding sequence is described below with reference to the diagrammatic illustration according to
A winding process commences with the feed phase 60, in which, as described above, the thread selection device 8 transfers the working threads 18 to the drum with the aid of the active thread guides 21A and brings them into the correct relative position. Altogether 6 active thread guides 21A are illustrated in the diagram. In the case of two passive thread guides 21P, the corresponding thread guide modules remain in their neutral position of readiness in which the stock threads 19 rest.
In the lower winding-over phase 61, the working threads 18 are read in into the lower shedding combs 40 with the aid of the active thread guides 21A. As described above, the divided threads are pushed onto the dividing cord and the active thread guides 21A subsequently move the threads together to the strip width B of the warping strip 17, on the one hand, and, at the same time, to the left to the foot point 38 of the conical portion 4, on the other hand. At the end of this process, the drum has executed a revolution of 360°.
This is then followed by the actual winding phase 62 for building the lap 37, and, depending on the thread quality, a sufficient number of drum revolutions N×360° to ensure that the desired lap height H is reached are required.
After the lap 37 is finished, this is followed by the upper winding-over phase 63 for reading in the threads into the upper shedding combs 40 on the outer ring 14. For this purpose, the active thread guides 21A move even further to the left and at the same time apart from one another again to the reading in width. For shedding and for advancing the dividing band into the open sheds, the drum again requires a full revolution of 360°.
The thread guides 21A subsequently move together into a row, in order to transfer the working threads 18 jointly to the outer thread driver 31, the thread guide modules cutting the working threads and, in turn, gripping them clampingly. This action is illustrated as the upper feed phase 64.
Without the drum being stopped, the next lap can then be wound in the same way, in which other threads are possibly called up on the thread selection device 8. Clearly, in this case, the inner ring 12, the outer ring 14 and also the thread selection device 8 move to the right by the amount of a strip width B.
Claims
1-30. (canceled)
31. A method for winding a composite thread structure consisting of a plurality of parallel threads, in particular in the form of a strip, onto a winding body rotating about an axis of rotation, wherein the winding position of each individual thread on the winding body is defined by means thread guide assigned to this thread.
32. The method as claimed in claim 31, wherein the thread guides are adjusted preferably in the direction of the axis of rotation out of a position of rest into a working position.
33. The method as claimed in claim 31, wherein a thread group consisting of a plurality of threads, preferably of different generic type, are led up to a thread selection device arranged in the winding region of the winding body, and in that individual threads of these are drawn off as working threads via the thread guides and form the strip, while the remaining threads are held clampingly as stock threads on the thread selection device in each case by means of a clamping point.
34. The method as claimed in claim 33, wherein, after at least one first winding sequence, the working threads of the wound strip are separated and are held clampingly on the thread selection device, and in that, in at least one second winding sequence, the working threads of the strip have a composition other than that during the first winding sequence.
35. The method as claimed in claim 33, wherein the selected working threads are first tensioned by means of the thread guides into a take-up position above the winding body in which they are freely tensioned, approximately parallel to the axis of rotation, between the thread guides and a clamping point in each case, and in that, in the course of a winding body rotation, all the working threads are picked up successively in the take-up position by an inner thread driver assigned to the winding body and are thereafter separated from the clamping points.
36. The method as claimed in claim 35, wherein the thread guides, together with their working threads, are moved into the strip winding position to the strip width after separation from the clamping points.
37. The method as claimed in claim 35, wherein, after the build-up of a strip lap, all the working threads are picked up successively by an outer thread driver co-rotating on the drum synchronously with the winding body and are thereafter clamped again by the clamping points and separated from the thread guide.
38. The method as claimed in claim 33, in which the winding body in a warping process is an integral part of a cone warping machine, wherein the thread selection device is displaced on a warping table in the direction of the axis of rotation for the conical winding of the strip.
39. The method particularly as claimed in claim 31, wherein, at the start of a strip lap, a shed for beating up a lease or for a sizing division is formed with at least some of the threads at least one location on the winding body, while the winding body is rotating, and in that a dividing element, in particular a dividing cord or a crossing rod, is introduced into the open shed.
40. The method as claimed in claim 39, wherein, to beat up the lease, at least two shedding combs arranged on the winding body one behind the other with respect to the circumferential direction or shedding combs arranged on an inner ring co-rotating synchronously with the winding body and surrounding the latter are moved out of a position of rest approximately tangential to the outer circumference into a shedding position, in which the comb ends project radially away from the outer circumference, and in that, in the course of a winding body rotation, the threads are preferably deposited alternately onto the comb ends and between the comb ends.
41. The method as claimed in claim 40, wherein the thread guides, together with their working threads, are moved into the strip winding position to the strip width after separation from the clamping points whereas, before the strip winding position is assumed, the thread guides are moved to a reading in position for depositing the threads onto the shedding combs.
42. The method as claimed in claim 40, wherein a crossing rod is introduced into a open shed, in that the shedding comb forming the respective shed is thereafter moved into the position of rest again, and in that, lastly, the threads divided by the crossing rod are stripped off onto a dividing element, preferably onto a dividing cord or onto a dividing band.
43. The method as claimed in claim 39, wherein, at the end of a strip lap, a shed is formed with at least some of the threads at least one location on an outer ring co-rotating synchronously with the winding body and surrounding the latter, and in that the dividing element is introduced into the open shed, shedding preferably taking place by similar means to those at the start of the strip lap.
44. The method as claimed in claim 31, wherein a plurality of strip laps having an identical or a different thread repeat are wound onto the winding body one against the other or next to one another, the winding body rotating uninterruptedly.
45. A device for winding a strip consisting of a plurality of parallel threads onto a winding body drivable in rotation about an axis of rotation, wherein, for each individual thread, a thread guide is arranged in the circumferential region of the winding body, via which thread guide the respective thread can be wound up and the winding position on the winding body can be defined.
46. The device as claimed in claim 45, wherein the thread guides are arranged successively in the form of an arc over the winding body with respect to the direction of rotation of the winding body, and in that they are adjustable preferably in the direction of the axis of rotation out of a position of rest into a working position.
47. The device as claimed in claim 45, wherein the thread guides are an integral part of a thread selection device which has in each case a clamping point and in each case a thread guide for a plurality of threads, some of these threads being capable of being drawn off via the thread guides as working threads forming the strip, while the remaining threads can be fixed in a standby position as stock threads at the clamping points.
48. The device as claimed in claim 47, wherein in each case a thread guide and a clamping point are assigned to a thread guide module which has a mechanism for adjusting the thread guide and a movable clamping/cutting unit with a clamping point for clamping the thread and with a cutting device for separating the thread.
49. The device as claimed in claim 48, wherein the mechanism of the thread guide module contains a traction mechanism with a traction means, in particular with a toothed belt, on which the thread guide is arranged in such a way that it can be moved along a thread guide distance approximately parallel to the axis of rotation of the winding body.
50. The device as claimed in claim 49, wherein the clamping/cutting unit is mounted movably, approximately at right angles to the thread guide distance, in such a way that the clamping point is displaceable with respect to the winding body circumference between a radially outer position of rest and a radially inner thread transfer position.
51. The device as claimed in claim 47, wherein the winding body is a warping drum of a cone warping machine, and in that the thread selection device is mounted on a warping table in such a way that said thread selection device is displaceable both parallel to and at right angles to the axis of rotation of the drum.
52. The device as claimed in claim 45, wherein it has an inner thread driver, arranged on the winding body, for gripping and taking up all the strip threads to be wound at the lap start, and also an outer thread driver, co-rotating synchronously with the winding body on an outer path of rotation, for temporarily gripping all the threads of a wound strip.
53. The device as claimed in claim 52, wherein the winding body is a warping drum of a cone warping machine, and in that the thread selection device is mounted on a warping table in such a way that said thread selection device is displaceable both parallel to and at right angles to the axis of rotation of the drum and in that the inner and the outer thread driver are displaceable parallel to the axis of rotation of the winding body, the inner thread driver being arranged on a linear guide in the winding body surface and the outer thread driver being arranged on an outer ring which is drivable in rotation and surrounds the winding body and which is mounted in an outer-ring bearing.
54. The device particularly as claimed in claim 45, wherein means for beating up a lease and for introducing a dividing element into a shed opened by the lease, while the winding body is rotating, are arranged at least one location on the circumferential region of the winding body.
55. The device as claimed in claim 54, wherein the means of at least two shedding combs which are arranged one behind the other with respect to the circumferential direction and approximately parallel to one another and which can be moved out of a position of rest approximately tangential to the outer circumference into a reading in position, in which the comb ends project radially away from the outer circumference, the threads being capable of being deposited alternately onto the comb ends and between the comb ends by means of the thread guides.
56. The device as claimed in claim 55, wherein each shedding comb is assigned a crossing rod which can be introduced, parallel to the shedding comb, into the open shed in order to introduce the dividing element.
57. The device as claimed in claim 56, wherein the dividing element is a dividing cord which can be drawn off from a preferably cylindrical dividing cord store held on the axis of movement of the crossing rod) next to the shedding comb, and in that next to the crossing rod is arranged a thread stripper, by means of which the tensioned threads can be pushed onto the dividing cord via the crossing rod fastened on the end face to the dividing cord store and via the dividing cord store.
58. The device as claimed in claim 54, wherein it has an outer ring which is drivable in rotation synchronously with the winding body and surrounds the latter and on which preferably the same means for beating up a lease, while the winding body is rotating, as in the drum are arranged at least one location on the circumferential region.
59. The device as claimed in claim 58, wherein the means, assigned to the winding body, for beating up a lease are arranged on an inner ring displaceable on the winding body surface or on an inner ring which co-rotates synchronously with the winding body and surrounds the latter and which is displaceable synchronously or asynchronously with the outer ring.
60. The device as claimed in claim 54, wherein the dividing element capable of being introduced on the shedding means of the outer ring and/or of the inner ring is a flexible dividing band which is mounted in the drum interior, is deflectable via the drum end and is displaceable parallel to the winding body casing.
Type: Application
Filed: Nov 9, 2005
Publication Date: Apr 24, 2008
Applicant: BENNINGER AG (Uzwil)
Inventors: Richard Storchenegger (Meilen), Lukas Kunz (Kusnacht)
Application Number: 11/718,817
International Classification: D02H 3/00 (20060101); B65H 57/16 (20060101); D02H 13/18 (20060101);