EP1712504B1 - Device and process for the handling and control of the yarn in a crosswinding head of a crosswinding machine in bobbin doffing operations - Google Patents
Device and process for the handling and control of the yarn in a crosswinding head of a crosswinding machine in bobbin doffing operations Download PDFInfo
- Publication number
- EP1712504B1 EP1712504B1 EP06111795A EP06111795A EP1712504B1 EP 1712504 B1 EP1712504 B1 EP 1712504B1 EP 06111795 A EP06111795 A EP 06111795A EP 06111795 A EP06111795 A EP 06111795A EP 1712504 B1 EP1712504 B1 EP 1712504B1
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- EP
- European Patent Office
- Prior art keywords
- yarn
- bobbin
- crosswinding
- pirn
- suction mouth
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 14
- 238000004804 winding Methods 0.000 claims description 19
- 238000005520 cutting process Methods 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000005304 joining Methods 0.000 claims description 7
- 230000007547 defect Effects 0.000 description 4
- 238000006467 substitution reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/22—Automatic winding machines, i.e. machines with servicing units for automatically performing end-finding, interconnecting of successive lengths of material, controlling and fault-detecting of the running material and replacing or removing of full or empty cores
- B65H54/26—Automatic winding machines, i.e. machines with servicing units for automatically performing end-finding, interconnecting of successive lengths of material, controlling and fault-detecting of the running material and replacing or removing of full or empty cores having one or more servicing units moving along a plurality of fixed winding units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H65/00—Securing material to cores or formers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/08—Automatic end-finding and material-interconnecting arrangements
- B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/08—Automatic end-finding and material-interconnecting arrangements
- B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
- B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the present invention relates to a device and process for the automatic doffing of bobbins in a crosswinding machine, or for the substitution of a bobbin which has reached the pre-established dimensions, with a new tube around which the yarn coming from a feeding pirn is wound to form a new bobbin.
- the procedure for the formation of a bobbin essentially consists of unwinding operations of the yarn from feeding pirns, cleaning the yarn from possible faults and its crosswinding on tubes, according to forms and dimensions which vary according to the destination of the yarn.
- the bobbins are normally cylindrical, or truncated-conical with a low conicity, if, on the contrary, the yarn is destined for feeding low-speed machines, the bobbins are truncated-conical with a higher conicity.
- the degree of conicity is selected so as to always ensure a correct unwinding of the bobbins during their final use, in the presence of more or less strong centrifugal forces.
- a crosswinding machine allows the contemporaneous formation of a series of bobbins, i.e. it normally comprises a series of so-called crosswinding heads, positioned side by side, and served by at least one common service device, also called trolley, which can run along the whole crosswinding machine, positioning itself in correspondence with each crosswinding head and which effects, in an automated manner, the operations which are cyclically required by each crosswinding head.
- a common service device also called trolley
- the bobbin may be necessary to intervene to substitute the run-down or faulty pirns, or to substitute the bobbin which has reached the pre-established dimensions, with a new tube.
- the crosswinding head In particular, in the case of bobbin doffing, or if it is necessary to substitute a bobbin which has reached the pre-established dimensions, the pirn from which the yarn comes, in turn, not yet being exhausted, the crosswinding head must be stopped in order to be able to discharge the bobbin and substitute it with a new tube. The yarn coming from the pirn is cut and the end is fastened to the new tube to restart the crosswinding.
- each crosswinding head is normally equipped with devices, situated along the run of the yarn from the feeding pirn to the winding bobbin, which eliminate possible defects of the yarn and remedy possible breakages.
- yarn defects in fact, said defects must be located, the yarn must be cut, the faulty part eliminated and the two ends, which have formed on the side of the pirn and bobbin, respectively, must be rejoined.
- accidental breaking of the yarn the disruption of the yarn must be detected and the two ends of the yarn, respectively from the one side of the spool/pirn and from the one side of the bobbin, must be once again jointed to each other.
- the capturing devices of the cut yarn ends normally consist of two suction mouths, for the collection of the yarn end coming from the pirn and from the bobbin, respectively, situated on arms oscillating between a first position, corresponding to the pirn and the bobbin, respectively, and a second position, in correspondence with the device for joining the yarn ends, also called joiner or knotter.
- the handling and control of the yarn during the bobbin doffing operations require the intervention of the common service device which, in cooperation with the devices of the crosswinding head situated along the run of the yarn from the feeding pirn to the winding bobbin, recovers the yarn end coming from the pirn, positions the new winding tube and arranges the yarn end on the new winding tube.
- the yarn running from the pirn to the bobbin is cut to prevent its continued winding onto the bobbin as a result of the rotation inertia of the same.
- the yarn ends connected to the pirn and the bobbin are recovered by means of respective suction mouths (in particular, for the end wound onto the bobbin, it is necessary to wait until the bobbin has stopped, the bobbin is then rotated in the opposite direction with respect to the winding direction, until a sufficiently long yarn end is unwound from the bobbin and can be sucked by the suction mouth) and carried by the same to the joining device, which re-establishes the yarn continuity.
- the service trolley intervene, collecting the yarn by means of a first manipulation device, cutting it, maintaining the end coming from the pirn, then, by means of a second manipulation device, removing the bobbin, which has reached the pre-established dimensions, and positioning a new winding tube, whereas the first manipulation device wedges the yarn coming from the pirn between the tube base and the counterpoint of the bobbin-holder arm. In this way it is possible to restart the yarn winding operations around the tube, to form a new bobbin.
- DE 3819873 A1 discloses a service trolley comprising means for collecting and positioning the run of the yarn coming from the lower pirn, to delivery it to the manipulation device on board of the service trolley. The run of the yarn is captured from the side of the bobbin.
- DE 4139892 A1 discloses a winding machine equipped with a suction mouth on the bobbin side having on its back a concave profile.
- An objective of the present invention is to facilitate the intervention of the service trolley, in particular its collection of the yarn to be inserted in the new winding tube during the doffing operations of a bobbin which has reached the desired dimensions.
- a further objective of the present invention is to guarantee a higher productivity of the crosswinding machine through a higher operating factor.
- FIG 1 various devices are shown of a preferred embodiment of a crosswinding head during crosswinding operations, and in particular a yarn 1, coming from a pirn (not shown), which is wound around the bobbin 2, together with a slit plate 3, a driving and traversing cylinder 4 and a bobbin-holding arm 5.
- the yarn 1 which is unwound from the pirn to the bobbin 2 crosses the slit plate 3, which has the function of detecting defects of the yarn 1, and, possibly, cutting it by means of a cutting device not shown in the figures, but substantially situated in the same position as the same slit plate 3.
- the driving and traversing cylinder 4 guides the yarn 1, through a backward-forward movement on the whole length of the bobbin 2, so that the yarn 1 is uniformly distributed on the whole length of the bobbin 2.
- the surface of the driving and traversing cylinder 4 is crossed by a series of grooves, also called cavities, inside which the yarn 1 is passed, the same driving and traversing cylinder 4 being maintained under rotation.
- the function of the suction mouth 6 and of a corresponding suction mouth on the side of the pirn is to take up the ends of the yarn 1, possibly formed due to the cutting or breakage of the yarn 1 and respectively connected to the pirn and the bobbin 2, and deliver them to the joining device 7, which reestablishes the continuity of the yarn 1.
- the suction mouth 6 on the side of the bobbin in correspondence with the detection of the formation of the pre-established dimensions of the bobbin 2, or, in any case, in correspondence with a command for changing the bobbin 2, the suction mouth 6 on the side of the bobbin, is moved, by rotating around an axis A, from its rest position to the position near the bobbin 2, without activating the suction. During its movement, the suction mouth 6 intercepts the run of the yarn 1, which is forced to pass onto the back of the suction mouth 6.
- the movement of the suction mouth can be activated, during the rotation of the bobbin 2 or after stopping it.
- the yarn 1 can be cut, the bobbin 2 slowed down and the two yarn ends joined, as in the procedure of the known art described above, before starting the movement of the suction mouth 6 on the side of the bobbin 2.
- the position of the yarn 1 on its back can be conveniently constrained through positioning means.
- the suction inlet 8 of the suction mouth 6 is extremely large (due to the main function of the suction mouth 6, consisting in recovering the end of a cut yarn from the bobbin 3, said end being at any point of the bobbin length), the back of the suction mouth 6 becoming narrower from the suction inlet 8 towards the oscillating arm 9, the yarn 1 can be situated in any point of the back of the suction mouth 6 and, during its rotation around the rotation axis A, in the absence of positioning means, it could also fall to the side.
- the positioning means of the yarn 1 are in the form of at least one draft, situated on the back of the suction mouth 6, V-shaped so that, once the yarn 1 is collected along the arms of the V-shaped draft, the same tends to converge towards the center of the draft itself.
- the positioning means of the yarn comprise two V-shaped drafts, a first draft 10 near the sucking inlet 8 of the suction mouth 6, substantially having the same width as the inlet 8 of the suction mouth 6, and a second draft 11, near the oscillating arm 9, with reduced dimensions.
- the yarn 2 occupies a well-defined position in the space between the back of the suction mouth 6 farthest away from the suction inlet 8 and the slit plate 3.
- the manipulating device 12 comprises a telescopic arm 14, which can rotate around an axis B, at whose end there is a nipping and cutting device 15.
- the call signal of the service trolley 13 on the part of the crosswinding head during a doffing operation of a bobbin can be sent in correspondence with reaching the pre-established filling degree of the bobbin 2, but also before this, so that the service trolley 13 is positioned in correspondence with the crosswinding head before the suction mouth 6 reaches the intervention position of the manipulation device 12.
- the devices of the trolley 13 which are involved in the doffing operations of the bobbin and its substitution with a new tube are ready to intervene the very moment in which the suction mouth 6 has reached the intervention position, but the trolley 13 could be forced to wait.
- the call signal of the service trolley 13 can be sent subsequently, so that the trolley 13 is situated in correspondence with the crosswinding head after the suction mouth 6 has reached the intervention position of the manipulation device 12.
- the time the service trolley 13 dedicates to the specific crosswinding head for the doffing operations of the bobbin 2 and its substitution, is minimized, but the crosswinding head could be forced to remain on standby.
- the telescopic arm 14 extends and the nipping and cutting device 15 collects the yarn 1, in correspondence with the area immediately behind the back of the suction mouth 6, as defined by the positioning device situated on said back.
- the nipping and cutting device 15 subsequently cuts the yarn 1 and withholds the end coming from the pirn, whereas the bobbin 2, freed by the bobbin-holding arm 5, is moved away.
- the manipulating device 12 moves away from the crosswinding head, to facilitate the return of the suction mouth 6 to its rest position.
- the subsequent insertion phase of the yarn 1 on the new winding tube can be completed, at this point, by the manipulation device 12, according to any of the known techniques, which have the common aspect of inserting the end of the yarn 1 between the base of the tube and a counterpoint envisaged on the arm of the bobbin-holder 5.
- the manipulation device 12 of the service trolley 13 subsequently leaves the yarn 1, and it is possible to start the formation of a new bobbin, whereas the service trolley 13 is free to intervene on other crosswinding heads of the crosswinding machine.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
Description
- The present invention relates to a device and process for the automatic doffing of bobbins in a crosswinding machine, or for the substitution of a bobbin which has reached the pre-established dimensions, with a new tube around which the yarn coming from a feeding pirn is wound to form a new bobbin.
- As is known, the procedure for the formation of a bobbin essentially consists of unwinding operations of the yarn from feeding pirns, cleaning the yarn from possible faults and its crosswinding on tubes, according to forms and dimensions which vary according to the destination of the yarn. If the yarn is destined for feeding high-speed machines, the bobbins are normally cylindrical, or truncated-conical with a low conicity, if, on the contrary, the yarn is destined for feeding low-speed machines, the bobbins are truncated-conical with a higher conicity. The degree of conicity is selected so as to always ensure a correct unwinding of the bobbins during their final use, in the presence of more or less strong centrifugal forces.
- A crosswinding machine allows the contemporaneous formation of a series of bobbins, i.e. it normally comprises a series of so-called crosswinding heads, positioned side by side, and served by at least one common service device, also called trolley, which can run along the whole crosswinding machine, positioning itself in correspondence with each crosswinding head and which effects, in an automated manner, the operations which are cyclically required by each crosswinding head.
- During the formation of the bobbin it may be necessary to intervene to substitute the run-down or faulty pirns, or to substitute the bobbin which has reached the pre-established dimensions, with a new tube.
- In particular, in the case of bobbin doffing, or if it is necessary to substitute a bobbin which has reached the pre-established dimensions, the pirn from which the yarn comes, in turn, not yet being exhausted, the crosswinding head must be stopped in order to be able to discharge the bobbin and substitute it with a new tube. The yarn coming from the pirn is cut and the end is fastened to the new tube to restart the crosswinding.
- Furthermore, according to the known art, each crosswinding head is normally equipped with devices, situated along the run of the yarn from the feeding pirn to the winding bobbin, which eliminate possible defects of the yarn and remedy possible breakages. In the case of yarn defects, in fact, said defects must be located, the yarn must be cut, the faulty part eliminated and the two ends, which have formed on the side of the pirn and bobbin, respectively, must be rejoined. In case of accidental breaking of the yarn, the disruption of the yarn must be detected and the two ends of the yarn, respectively from the one side of the spool/pirn and from the one side of the bobbin, must be once again jointed to each other.
- It is evident that, along the run of the yarn from the unwinding pirn to the winding bobbin, in a crosswinding head, devices for detecting the characteristics of the yarn must be present, together with devices for cutting the yarn, devices for capturing the ends of the cut (or accidentally broken) yarn and devices for joining the ends of the yarn. In particular, the capturing devices of the cut yarn ends normally consist of two suction mouths, for the collection of the yarn end coming from the pirn and from the bobbin, respectively, situated on arms oscillating between a first position, corresponding to the pirn and the bobbin, respectively, and a second position, in correspondence with the device for joining the yarn ends, also called joiner or knotter.
- The handling and control of the yarn during the bobbin doffing operations, require the intervention of the common service device which, in cooperation with the devices of the crosswinding head situated along the run of the yarn from the feeding pirn to the winding bobbin, recovers the yarn end coming from the pirn, positions the new winding tube and arranges the yarn end on the new winding tube.
- It is therefore important to provide for all the necessary expedients so that all the devices of the different crosswinding heads can cooperate in an optimal way with the common service device, so that the yarn coming from the new pirn is effectively collected by the common service device, which, subsequently, provides for its disposal on the new tube.
- According the known art, when it is necessary to substitute a bobbin which has reached the pre-established dimensions, the yarn running from the pirn to the bobbin is cut to prevent its continued winding onto the bobbin as a result of the rotation inertia of the same. The yarn ends connected to the pirn and the bobbin are recovered by means of respective suction mouths (in particular, for the end wound onto the bobbin, it is necessary to wait until the bobbin has stopped, the bobbin is then rotated in the opposite direction with respect to the winding direction, until a sufficiently long yarn end is unwound from the bobbin and can be sucked by the suction mouth) and carried by the same to the joining device, which re-establishes the yarn continuity. Only at this point, as the yarn is not moving, can the service trolley intervene, collecting the yarn by means of a first manipulation device, cutting it, maintaining the end coming from the pirn, then, by means of a second manipulation device, removing the bobbin, which has reached the pre-established dimensions, and positioning a new winding tube, whereas the first manipulation device wedges the yarn coming from the pirn between the tube base and the counterpoint of the bobbin-holder arm. In this way it is possible to restart the yarn winding operations around the tube, to form a new bobbin.
- The above procedure is not very effective as it requires a cutting and subsequent joining of the yarn before the service trolley can intervene and recut the yarn. This procedure however not only solves the problem of the undesired winding of the yarn around the bobbin, due to the rotation inertia of the same, but, above all, it facilitates the withdrawal of the yarn by the manipulation device of the service trolley, which only intervenes when the yarn has stopped. In order to assure a uniform winding of the yarn on the bobbin, in fact, a so-called cross-winding is effected, using means which guide the yarn with a backward-forward movement along the whole length of the bobbin in formation. These means can consist, for example, of a so- called driving or traversing cylinder i.e. which makes the bobbin rotate and having grooves on its surface which, while the cylinder is rotating and makes the bobbin rotate, direct the yarn according to a backward-forward movement from one end to the other of the bobbin. Under these conditions, the difficulty for the trolley to intervene on the moving yarn, due to the continuous movement of the yarn during its winding onto the bobbin, can be easily understood.
- According to alternative solutions of the known art, it was proposed to cut the yarn when the bobbin has reached the desired dimensions, not to recover however the two ends to re-establish the yarn continuity, but only to recover the end on the pirn side and deliver it to the trolley to be inserted on the winding tube.
- A known procedure for the capturing of the feeding pirn end and its consignment to the service trolley, is described in the patent
EP 1127831 in the name of Schlafhorst AG, and envisages that the yarn end be collected by an arm equipped with a nipper which delivers it to a seizure and cutting device situated near the joiner. The yarn is cut by this seizure and cutting device and is collected by a collecting device, from which it is collected by a special supplementary sucking tube which transfers the cut yarn to a seizure and cutting device situated in the upper zone of the crosswinding head, wherein the yarn can be easily reached by the manipulator of the service trolley. This solution requires a series of specific devices, in correspondence with each crosswinding head, which only operate when necessary. - According to
European patent application EP 1236668 , in the name of Murata Kikai Kabushiki Kaisha, a procedure is described wherein the yarn end on the pirn side is collected by the suction mouth which is on the side of the pirn and directly delivered by the same to the manipulator of the common service trolley. This solution does not require additional devices on the crosswinding heads, but it is necessary to equip the service trolley manipulator with an extendable arm, capable of reaching and collecting the yarn end in a lowered position with respect to that required for its subsequent arrangement on the tube. - In
European patent application EP 1428783 , in the name of Sauer GmbH, a process and a device are described which allow the recovery of the yarn end coming from the pirn, by sucking it with the suction mouth which is situated on the side of the pirn and carrying it to a area crossed by the run of the suction mouth situated on the side of the bobbin. After positioning the suction mouth which is on the side of the bobbin, near the yarn, the suction of the suction mouth situated on the bobbin side is stopped, whereas the suction is activated of the suction mouth which is on the side of the bobbin. In this way, the suction mouth on the side of the bobbin takes delivery of the yarn end. The suction mouth situated on the bobbin side is then rotated to the position near the bobbin, wherein the yarn is collected by the manipulator of the common service trolley. In this way, the intervention of the service trolley is facilitated with respect to the disclosure of the Murata patent, as it is not necessary to excessively extend the arm of the service trolley, but the exchange efficiency of the yarn between the two suction mouths which takes place by deactivating the suction of the suction mouth which is on the side of the pirn and thus allowing the suction mouth situated on the side of the bobbin to suck the yarn end, does not guarantee adequate success, bearing in mind that there can be a considerable yarn length already engaged by the suction mouth on the pirn side, which can therefore hinder the sucking action on the part of the suction mouth on the side of the bobbin. This possibility of error in the consignment of the yarn is extremely undesirable as it would jeopardize the restarting of the crosswinding head, thus creating a lack of production. -
DE 3819873 A1 discloses a service trolley comprising means for collecting and positioning the run of the yarn coming from the lower pirn, to delivery it to the manipulation device on board of the service trolley. The run of the yarn is captured from the side of the bobbin.DE 4139892 A1 discloses a winding machine equipped with a suction mouth on the bobbin side having on its back a concave profile. - An objective of the present invention is to facilitate the intervention of the service trolley, in particular its collection of the yarn to be inserted in the new winding tube during the doffing operations of a bobbin which has reached the desired dimensions.
- A further objective of the present invention is to guarantee a higher productivity of the crosswinding machine through a higher operating factor.
- These objectives according to the present invention are achieved by providing a process for the handling and control of the yarn in a crosswinding machine in doffing operations of a bobbin, as specified in
claim 2, and a crosswinding machine particularly suitable for the embodiment of this process as claimed inclaim 1. - The present invention will be now described, for illustrative but non-limiting purposes, according to one of its preferred embodiments, with particular reference to the figures of the annexed drawings, wherein
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figure 1 schematically shows some of the devices of a crosswinding head and a service trolley of a crosswinding machine during crosswinding, -
figures 2-5 schematically show some of the devices of a crosswinding head and a service trolley of a crosswinding machine during a sequence of phases of the process for the handling and control of the yarn in bobbin doffing operations, -
figure 6 shows a suction mouth for the recovery of yarn ends on the side of the bobbin, which has positioning means of the yarn on its back, according to an embodiment of the present invention. - With reference to
figure 1 , various devices are shown of a preferred embodiment of a crosswinding head during crosswinding operations, and in particular ayarn 1, coming from a pirn (not shown), which is wound around thebobbin 2, together with aslit plate 3, a driving and traversingcylinder 4 and a bobbin-holding arm 5. Asuction mouth 6 for suckingyarn 1 ends on the side of thebobbin 2 and ajoiner 7, are also shown. - Under normal operating conditions,
figure 1 , theyarn 1 which is unwound from the pirn to thebobbin 2 crosses theslit plate 3, which has the function of detecting defects of theyarn 1, and, possibly, cutting it by means of a cutting device not shown in the figures, but substantially situated in the same position as thesame slit plate 3. The driving and traversingcylinder 4 guides theyarn 1, through a backward-forward movement on the whole length of thebobbin 2, so that theyarn 1 is uniformly distributed on the whole length of thebobbin 2. For this purpose, the surface of the driving and traversingcylinder 4 is crossed by a series of grooves, also called cavities, inside which theyarn 1 is passed, the same driving and traversingcylinder 4 being maintained under rotation. - The function of the
suction mouth 6 and of a corresponding suction mouth on the side of the pirn (not shown) is to take up the ends of theyarn 1, possibly formed due to the cutting or breakage of theyarn 1 and respectively connected to the pirn and thebobbin 2, and deliver them to the joiningdevice 7, which reestablishes the continuity of theyarn 1. - With reference to
figure 2 , according to the present invention, in correspondence with the detection of the formation of the pre-established dimensions of thebobbin 2, or, in any case, in correspondence with a command for changing thebobbin 2, thesuction mouth 6 on the side of the bobbin, is moved, by rotating around an axis A, from its rest position to the position near thebobbin 2, without activating the suction. During its movement, thesuction mouth 6 intercepts the run of theyarn 1, which is forced to pass onto the back of thesuction mouth 6. - As an alternative, the movement of the suction mouth can be activated, during the rotation of the
bobbin 2 or after stopping it. In this second option, theyarn 1 can be cut, thebobbin 2 slowed down and the two yarn ends joined, as in the procedure of the known art described above, before starting the movement of thesuction mouth 6 on the side of thebobbin 2. - When the rotation of the
bobbin 2 is interrupted before thesuction mouth 6 has reached the position near thebobbin 2 from its rest position, the necessary amount of yarn due to the engagement of the yarns itself on the back of the suction mouth, will be taken from the pirn. Furthermore, in order to facilitate the exit of theyarn 2 from the grooves of the driving and traversing 4, it may be necessary to maintain the same driving and traversingcylinder 4 in rotation, after removing the connection through which thecylinder 4 transmitted its movement to thebobbin 2 in formation. - During the movement phase of the
suction mouth 6, the position of theyarn 1 on its back, can be conveniently constrained through positioning means. With reference tofigure 6 , in fact, as thesuction inlet 8 of thesuction mouth 6 is extremely large (due to the main function of thesuction mouth 6, consisting in recovering the end of a cut yarn from thebobbin 3, said end being at any point of the bobbin length), the back of thesuction mouth 6 becoming narrower from thesuction inlet 8 towards the oscillating arm 9, theyarn 1 can be situated in any point of the back of thesuction mouth 6 and, during its rotation around the rotation axis A, in the absence of positioning means, it could also fall to the side. - The positioning means of the
yarn 1 are in the form of at least one draft, situated on the back of thesuction mouth 6, V-shaped so that, once theyarn 1 is collected along the arms of the V-shaped draft, the same tends to converge towards the center of the draft itself. With reference tofigure 6 , the positioning means of the yarn comprise two V-shaped drafts, a first draft 10 near the suckinginlet 8 of thesuction mouth 6, substantially having the same width as theinlet 8 of thesuction mouth 6, and asecond draft 11, near the oscillating arm 9, with reduced dimensions. During rotation around the axis A, in fact, thesuction mouth 6 engages theyarn 1 first with its portion closer to the suckinginlet 8. Consequently, due to the effect of the first draft 10, theyarn 1 will have already reached a well-defined position when it engages the whole back of thesuction mouth 6, and consequently thesecond draft 11. - With reference to
figure 3 , when thesuction mouth 6 has reached the end of its run, or with thesuction inlet 8 near the driving and traversingcylinder 4, theyarn 2 occupies a well-defined position in the space between the back of thesuction mouth 6 farthest away from thesuction inlet 8 and theslit plate 3. In correspondence with this position, theyarn 1 can be reached with great precision by the manipulatingdevice 12 of aservice trolley 13. In particular, the manipulatingdevice 12 comprises atelescopic arm 14, which can rotate around an axis B, at whose end there is a nipping and cuttingdevice 15. - From an operative point of view, the call signal of the
service trolley 13 on the part of the crosswinding head during a doffing operation of a bobbin, can be sent in correspondence with reaching the pre-established filling degree of thebobbin 2, but also before this, so that theservice trolley 13 is positioned in correspondence with the crosswinding head before thesuction mouth 6 reaches the intervention position of themanipulation device 12. In this way, the devices of thetrolley 13 which are involved in the doffing operations of the bobbin and its substitution with a new tube, are ready to intervene the very moment in which thesuction mouth 6 has reached the intervention position, but thetrolley 13 could be forced to wait. - As an alternative, the call signal of the
service trolley 13 can be sent subsequently, so that thetrolley 13 is situated in correspondence with the crosswinding head after thesuction mouth 6 has reached the intervention position of themanipulation device 12. In this way, the time theservice trolley 13 dedicates to the specific crosswinding head for the doffing operations of thebobbin 2 and its substitution, is minimized, but the crosswinding head could be forced to remain on standby. - With reference to
figure 4 , once theservice trolley 13 and thesuction mouth 6 are in the right position, thetelescopic arm 14 extends and the nipping and cuttingdevice 15 collects theyarn 1, in correspondence with the area immediately behind the back of thesuction mouth 6, as defined by the positioning device situated on said back. - With reference to
figure 5 , the nipping and cuttingdevice 15 subsequently cuts theyarn 1 and withholds the end coming from the pirn, whereas thebobbin 2, freed by the bobbin-holdingarm 5, is moved away. - Still maintaining the hold of the
yarn end 1 coming from the pirn, the manipulatingdevice 12 moves away from the crosswinding head, to facilitate the return of thesuction mouth 6 to its rest position. - The subsequent insertion phase of the
yarn 1 on the new winding tube, can be completed, at this point, by themanipulation device 12, according to any of the known techniques, which have the common aspect of inserting the end of theyarn 1 between the base of the tube and a counterpoint envisaged on the arm of the bobbin-holder 5. - The
manipulation device 12 of theservice trolley 13 subsequently leaves theyarn 1, and it is possible to start the formation of a new bobbin, whereas theservice trolley 13 is free to intervene on other crosswinding heads of the crosswinding machine.
Claims (2)
- A crosswinding machine comprising a series of crosswinding heads and at least one service trolley (13), each of said crosswinding heads comprising a pirn, from which a yarn (1) is unravelled and is wound around a bobbin (2), two mouths for the suction of the yarn (1) ends possibly formed, by breakage or cutting, on the side of the pirn or on the side of the bobbin (2) respectively, and the delivery of these ends to a joining device (7), situated along the run of the yarn (1) from the pirn to the bobbin (2), to re-establish the yarn continuity, said service trolley (13) being capable of running along the whole crosswinding machine, in order to position itself in correspondence with each crosswinding head and comprising a manipulation device (12) of the yarn (1) characterized in that the crosswinding machine comprises means for moving the run of the yarn (1) to a definite position, close to the terminal portion of its course from the pirn to the bobbin (2), said means being positioned on each crosswinding head and consist of two V-shaped drafts, situated on the back of the suction mouth (6) on the side of the bobbin, a first draft (10) near the sucking inlet (8) of the suction mouth (6), substantially having the same width as the inlet (8) of the suction mouth (6), and a second draft (11), near the oscillating arm (9) of the suction mouth (6).
- A process for the handling and control of the yarn (1) in a crosswinding head of a crosswinding machine in bobbin (2) doffing operations, said crosswinding machine being equipped with a series of crosswinding heads and with at least one service trolley (13), each of said crosswinding heads comprising a pirn, from which a yarn (1) is unravelled and is wound to form a bobbin (2), around a winding tube, two mouths for the sucking of the yarn (1) ends possibly formed, by breakage or cutting, on the side of the pirn or on the side of the bobbin (2) respectively, and for the delivery of these ends to a joining device (7), situated along the run of the yarn (1) from the pirn to the bobbin (2), to re-establish the yarn continuity, said service trolley (13) being capable of running along the whole crosswinding machine, in order to position itself in correspondence with each crosswinding head and comprising a manipulation device (12) of the yarn (1) according to the following phases:- moving the yarn (1) run in a defined position, near the terminal portion of its course from the pirn to the bobbin (2),- seizure and cutting of the yarn (1), in correspondence of said defined position on the part of a manipulation device (12) of the service trolley (13), which withholds the end coming from the pirn,- distancing of the bobbin (2), arrangement of a new winding tube of the yarn (1) coming from the pirn and start of the formation of a new bobbin,characterized in that said movement phase of the yarn (1) run to a definite position is effected by positioning means present on each crosswinding head and said positioning means consist of two V-shaped drafts, situated on the back of the suction mouth (6) on the side of the bobbin, a first draft (10) near the sucking inlet (8) of the suction mouth (6), substantially having the same width as the inlet (8) of the suction mouth (6), and a second draft (11), near the oscillating arm (9) of the suction mouth (6).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000629A ITMI20050629A1 (en) | 2005-04-13 | 2005-04-13 | DEVICE AND PROCEDURE FOR THE HANDLING AND CONTROL OF THE WIRE IN A HEAD OF ROCKING OF A WINDING MACHINE IN THE LEVELING OPERATIONS OF A ROCK |
Publications (4)
Publication Number | Publication Date |
---|---|
EP1712504A2 EP1712504A2 (en) | 2006-10-18 |
EP1712504A3 EP1712504A3 (en) | 2008-03-26 |
EP1712504A8 EP1712504A8 (en) | 2008-10-08 |
EP1712504B1 true EP1712504B1 (en) | 2010-07-07 |
Family
ID=37076916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06111795A Active EP1712504B1 (en) | 2005-04-13 | 2006-03-28 | Device and process for the handling and control of the yarn in a crosswinding head of a crosswinding machine in bobbin doffing operations |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060230738A1 (en) |
EP (1) | EP1712504B1 (en) |
CN (1) | CN1847128B (en) |
DE (1) | DE602006015249D1 (en) |
IT (1) | ITMI20050629A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1391706B1 (en) * | 2008-11-12 | 2012-01-27 | Sormani | ACTUATOR DEVICE FOR AUTOMATION OF INDUSTRIAL PROCESSES |
DE102014012730A1 (en) * | 2014-08-26 | 2016-03-03 | Saurer Germany Gmbh & Co. Kg | Method for operating a workstation of a textile machine producing textile cheeses or associated workstation |
IT201600071598A1 (en) * | 2016-07-08 | 2018-01-08 | Savio Macch Tessili Spa | METHOD OF LEVERAGE IN AN OPEN-END TYPE SPINNING MACHINE |
JP2018065638A (en) * | 2016-10-18 | 2018-04-26 | 村田機械株式会社 | Yarn winding equipment and package speed reduction method |
JP2018065659A (en) * | 2016-10-19 | 2018-04-26 | 村田機械株式会社 | Yarn winding device and yarn piecing method |
CN108639862B (en) * | 2018-07-02 | 2023-12-19 | 浙江凯成智能设备股份有限公司 | Yarn driving mechanism of bobbin winder |
CN111392514A (en) * | 2020-03-27 | 2020-07-10 | 青岛宏大纺织机械有限责任公司 | Spinning-in device and spinning-in method of doffing trolley |
DE102021118848A1 (en) | 2021-07-21 | 2023-01-26 | Maschinenfabrik Rieter Ag | Method for operating a textile machine, workplace of a textile machine and textile machine |
DE102021118842A1 (en) | 2021-07-21 | 2023-01-26 | Maschinenfabrik Rieter Ag | Method for operating a workstation on a textile machine, and workstation on a textile machine |
CN115009928A (en) * | 2022-06-27 | 2022-09-06 | 张家港扬子纺纱有限公司 | Yarn production system capable of reducing yarn damage through flexible logistics in winding |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5949332B2 (en) * | 1976-06-25 | 1984-12-01 | 村田機械株式会社 | How to splice yarn without stopping spinning |
JPS63310468A (en) | 1987-06-10 | 1988-12-19 | Murata Mach Ltd | Automatic winder |
IT1237883B (en) * | 1989-12-12 | 1993-06-18 | Roberto Badiali | DEVICE FOR ANCHORING THE WIRE TO THE SURFACE OF THE WINDING TUBE |
DE4139892C2 (en) | 1991-12-04 | 2001-04-19 | Schlafhorst & Co W | Process for producing a thread connection at a winding point of a winding machine |
DE19533833B4 (en) * | 1995-09-13 | 2004-08-05 | Saurer Gmbh & Co. Kg | Cross-wound bobbin changing device of a cross-wound bobbin textile machine |
DE19836702A1 (en) * | 1998-08-13 | 2000-02-17 | Schlafhorst & Co W | Textile machine producing cross-wound bobbins |
DE10007950A1 (en) * | 2000-02-22 | 2001-08-23 | Schlafhorst & Co W | Device for starting up a work station of a textile machine producing cross-wound bobbins |
JP3646682B2 (en) * | 2001-02-28 | 2005-05-11 | 村田機械株式会社 | Method of attaching yarn to winding tube in automatic winder and automatic winder |
DE10257804A1 (en) * | 2002-12-11 | 2004-07-01 | Saurer Gmbh & Co. Kg | Method and device for starting up a work station of a textile machine that produces cheese |
-
2005
- 2005-04-13 IT IT000629A patent/ITMI20050629A1/en unknown
-
2006
- 2006-03-28 EP EP06111795A patent/EP1712504B1/en active Active
- 2006-03-28 DE DE602006015249T patent/DE602006015249D1/en active Active
- 2006-03-28 US US11/391,515 patent/US20060230738A1/en not_active Abandoned
- 2006-04-13 CN CN200610073628XA patent/CN1847128B/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE602006015249D1 (en) | 2010-08-19 |
EP1712504A8 (en) | 2008-10-08 |
EP1712504A2 (en) | 2006-10-18 |
CN1847128A (en) | 2006-10-18 |
US20060230738A1 (en) | 2006-10-19 |
ITMI20050629A1 (en) | 2006-10-14 |
EP1712504A3 (en) | 2008-03-26 |
CN1847128B (en) | 2011-07-20 |
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