JP7493925B2 - Method for operating a winding device - Google Patents

Description

The invention relates to a method for operating a winding device for producing a yarn package, the winding device comprising a yarn package frame for rotatably holding a winding package, a grooved roller arranged upstream of the winding package in the yarn running direction for positioning the yarn during winding onto the winding package for producing a yarn package, and a feed device for feeding the yarn to be wound onto the grooved roller, in which the yarn is first fed to the grooved roller under yarn tension by means of the feed device and then wound onto the winding package arranged on the grooved roller, the grooves of the grooved roller determining the position of the yarn in the winding package. The invention further relates to a corresponding winding device for producing a yarn package.

From the publication DE 10 2014 009 203 A1, a working unit of a textile machine for producing a twill winding package is already known, which comprises a pivotally supported package frame for rotatably holding the winding package, a roller against which the winding package contacts during the winding process, and a yarn suction device, which can be supplied with vacuum if necessary, for receiving the upper thread wound up on the surface of the winding package after a winding interruption. The yarn suction device is a stationary device which has a movably supported upper pivoting metal sheet and a movably supported lower pivoting metal sheet, both of which are respectively arranged around a roller and which form a suction nozzle contour, which can be supplied with vacuum, for receiving the upper thread in the area of the surface of the winding package between the two pivoting metal sheets.

However, with the methods for operating a winding device known from the prior art, incorrect traverses of the yarn in the package may occur during production of the yarn package, which may reduce the quality of the yarn package and may cause problems during subsequent use of the yarn package. In particular, in the region of the two edge regions of the yarn package, the yarn may inadvertently extend beyond the side portions of the yarn package, which may then cause uneven payout of the yarn in the package.

Thus, one aspect of the invention relates to a method for operating a winding device for producing a yarn package, comprising a yarn package frame, in particular a pivotally supported yarn package frame, for rotatably holding a winding package, a grooved roller arranged upstream of the winding package in the yarn running direction for positioning the yarn during winding onto the winding package for producing the yarn package, and a feed device for feeding the yarn to be wound onto the grooved roller, in which the yarn is first fed to the grooved roller under yarn tension by means of the feed device and then the yarn is wound onto the winding package arranged on the grooved roller, the grooves of the grooved roller determining the position of the yarn in the winding package.

The method according to the invention is characterized in that, in order to prevent incorrect traverse of the yarn in the winding package, in particular in the region of the end faces of the yarn package, a yarn guide element extending across the width of the grooved roller and pivotably supported parallel to the surface of the grooved roller can be moved between the yarn to be wound and the grooved roller in such a way that the yarn is at least partially lifted out of the grooves of the grooved roller and pulled by the yarn tension from the edge region of the yarn package in the direction of the center of the yarn package.

The winding device for producing a yarn package according to the present invention comprises a yarn package frame for rotatably holding the winding package in order to wind the yarn onto the yarn package, a grooved roller arranged upstream of the winding package in the yarn running direction and having a groove for positioning the yarn during winding onto the winding package, and a feeder for feeding the yarn to be wound onto the grooved roller, the feeder including a yarn tensioner for feeding the yarn under yarn tension. Furthermore, a yarn guide element extending beyond the width of the grooved roller is pivotably supported parallel to the surface of the grooved roller in order to be able to move between the yarn to be wound and the grooved roller, whereby incorrect traverse of the yarn in the winding package can be easily prevented.

The method according to the invention thus effectively prevents incorrect traverses and the formation of slippage, in particular at the edges or sides of the yarn package, in that at least before or during the incorrect traverse, the yarn guided by the groove of the grooved roller is lifted out of the groove by means of the yarn guide element at least for a short time and guided along the yarn guide element by the yarn tension towards the center of the package, thereby eliminating incorrect traverses at the edges of the yarn package. Furthermore, the method according to the invention does not require structurally complex yarn guide devices and costly modifications of the winding method, which would reduce the winding speed of the winding device.

A winding device is essentially a device that is provided for producing a yarn package from a single yarn. In this case, the winding device may be a separate component and in particular a single machine. Preferably, however, the winding device is part of a textile machine or spinning machine, in particular a rotor spinning machine. It is also preferred that the winding device is one of a number of working units, in particular one of a number of identical working units, of a textile machine that produces a package, in particular a twill yarn package. Particularly preferably, the winding device is a working station of an automatic winding machine, in particular an autocorner type. Such a winding device or a working unit that has a winding device preferably further comprises, in each case, a lower thread sensor, a thread tensioner, a thread clearer with a thread cutting device, a thread tension sensor, a thread catcher nozzle and/or a paraffin treatment device.

To produce a yarn package, a yarn is first wound onto an empty winding package until a completely finished or full yarn package/winding package is formed. Preferably, the winding of the yarn takes place in a predefined arrangement of the course of the yarn in the yarn package. Preferably, with the aid of a winding device or with the aid of the respective operating unit of the textile machine producing the yarn package, a yarn supply bobbin, for example a spinning cop, which is particularly preferably produced with a textile machine, for example a ring spinning machine, rotor spinning machine or air spinning machine and has a relatively small amount of yarn material, is wound back onto a yarn package, very particularly preferably having a significantly larger yarn volume than the yarn supply bobbin, in particular a twill yarn package. The yarn may first be any, in particular twisted, spun yarn made of fibers of any material, in particular natural fibers such as wool or cotton, and/or chemical fibers. Preferably, the yarn is a garn, twisted yarn or the like.

The yarn is continuously fed to the winding package via a grooved roller to produce a yarn package, the yarn running direction being the direction of movement of the yarn during this feeding. The feeding device can in principle be formed from any number of components or assemblies made of any material. Preferably, the feeding device is formed completely closed, so that the spread of fiber dust or fibers around the winding device can be reduced as much as possible. Preferably, the feeding device, and in particular the opening of the feeding device for feeding the yarn, is arranged in the center of the grooved roller and/or the winding package. Also preferably, the feeding with the feeding device is oriented perpendicularly towards the surface of the grooved roller.

According to the invention, the yarn is fed under yarn tension. This can be generated in any way. For this purpose, the yarn can be tensioned mechanically, in particular by means of a yarn tensioner, and/or by means of an air flow against the yarn running direction. The yarn is thus wound up against the yarn tension, so that a neat and kink-free package can be produced.

To produce the yarn package, the winding package is held by a yarn package frame, which allows the winding package to rotate in order to wind the yarn. Preferably, the yarn package frame is pivotally supported, with the pivot axis of the yarn package frame preferably running parallel to the rotation axis of the winding package and/or the grooved roller.

In order to determine the exact position of the yarn on the winding roller during winding or to guide the yarn during winding, a grooved roller is arranged upstream of the winding package in the yarn running direction, in particular immediately upstream of the winding package, very particularly preferably in mutual rolling contact with the winding package. Preferably, the grooved roller has a length at least as long as the winding package, so that reliable guidance of the yarn over the entire width of the yarn package or winding package during winding can be ensured.

To guide the yarn, the grooved roller has at least one groove on its surface, in which the yarn to be wound is guided. When the yarn is guided in the winding device by the grooved roller or by the groove of the grooved roller, the grooved roller forces the yarn to follow a known path that is preset by the geometry of the groove. In this case, the at least one groove preferably extends in such a way that the yarn package is wound into a twill yarn package.

In order to be able to produce a twill yarn package, the grooved roller preferably has only one groove which runs at an angle from one end of the grooved roller to the other end and again from the other end to the one end, with this groove on the surface of the grooved roller particularly preferably intersecting several times so that the individual parts of the groove can be considered as grooves running side by side with each other on the surface. Particularly preferably, the groove runs at an angle which remains equal along the longitudinal central axis of the grooved roller in at least one direction, particularly preferably in both directions, whereby a uniform winding of the yarn into the yarn package is achieved.

The thread guide element may firstly be any part or any assembly, where the thread guide element extends at least over the entire circumference and/or over at least the entire width of the grooved surface of the grooved roller, so that the thread guide element can be shifted between the thread and the grooved roller, independently of the position of the thread in the groove or in the grooved roller, and thus lift the thread out of the groove. For this purpose, the thread guide element preferably has at least one flat and/or leading edge arranged parallel to the surface of the grooved roller. Particularly preferably, all thread guide elements are formed curved at equal intervals relative to the surface of the grooved roller.

According to the invention, the yarn guide element can be pivoted over at least one portion parallel to the surface of the grooved roller, the center point or pivot axis of this pivoting movement being preferably identical to the axis of rotation of the grooved roller. More preferably, the yarn guide element can be shifted completely into the area between the opening of the feed device for discharging the yarn and the area of the surface of the grooved roller in contact with the yarn. Particularly preferably, the yarn guide element can also be moved completely out of this area.

When the yarn guide element is moved between the yarn to be wound coming from the feed device and the surface of the grooved roller, the yarn is lifted from the groove of the grooved roller and is therefore no longer guided in the direction along the rotation axis of the grooved roller. The yarn is accordingly pulled into a straight path between the winding package or the surface of the yarn package and the feed device, in particular the opening for the yarn, due to the yarn tension. The feed device is preferably not arranged in the region of one end of the yarn package, and even less offset to the side thereto, but particularly preferably in the region of the center of the yarn package and/or the grooved roller, so that the yarn lifted from the groove is pulled towards the center of the yarn package, unlike the case where it is guided in the groove, so that incorrect traverse in the region of the edge of the yarn package is avoided or eliminated.

In a preferred embodiment of the method according to the invention, the feeding in the feeding device with a closed yarn path formed as a yarn passage is preferably carried out against a negative pressure and/or an air flow against the yarn running direction, the yarn guide element being particularly preferably part of a suction nozzle cover which can very particularly preferably be moved along a peripheral section of the grooved roller, so that in order to carry out the method according to the invention in a preferred manner, an existing winding device only needs to be adapted by adding a hitherto unknown yarn guide element in the region of the grooved roller, and the performance of an existing winding device can also be increased without high costs for carrying out or using the method.

Particularly preferably, the suction nozzle shield is a lower and/or inner suction nozzle shield, which can be moved both below and above the grooved roller in the mounting position of the winding device as a lower suction nozzle shield, whereas very particularly preferably, a second, in particular an upper and/or outer suction nozzle shield, which is likewise arranged in the region of the grooved roller, is provided only for positioning above the grooved roller. It is also preferred that the inner suction nozzle shield is arranged closer to the surface of the grooved roller than the outer suction nozzle shield, in which case it is particularly preferred that both suction nozzle shields can be moved and/or positioned independently of one another, and in particular also above and below one another. Finally, preferably, one or both suction nozzle shields are formed as pivoting metal sheets. The yarn guide elements, and in particular the suction nozzle shields, preferably form one or more end elements of the yarn channel, which is closed except for the lower and upper openings.

In a preferred development of the method according to the invention, the thread tension is generated in the feed device by a thread tensioner arranged upstream of the grooved roller in the thread running direction and/or the feed device is arranged centrally upstream of the grooved roller in such a way that the thread lifted from the groove by means of the thread guide element is pulled towards the center of the grooved roller and/or the winding package. In this way, the thread can be pulled towards the center of the winding package in a particularly simple manner and without additional elements during or before an incorrect traverse in the winding package, so that the formation of a slippage is reliably prevented in particular. For this purpose, the feed device is preferably arranged offset from the center by no more than 25%, particularly preferably no more than 15%, very particularly preferably no more than 5%, in relation to the overall width of the grooved roller and/or the winding roller. Particularly preferably, the feed device is arranged exactly in the center.

In a preferred embodiment of the method according to the invention, the winding package is driven by the grooved roller by friction, so that the winding package and the grooved roller roll against each other. In this way, the drive of the yarn package formed in the winding package is achieved in a particularly simple manner, which is advantageous since the track speed of the yarn package at the surface remains the same, and therefore the yarn feed speed does not have to be increased with increasing yarn package diameter. For this purpose, the rotation axis of the winding package and/or the winding package frame is arranged parallel to the rotation axis of the grooved roller. Particularly preferably, the grooved roller is driven by means of a drive unit, whereas very particularly preferably, the winding package and/or the yarn package frame is formed without a drive.

In general, and especially when driving the winding package by means of a grooved roller, it is preferred to drive the winding package and the grooved roller in opposite directions of rotation. In this way, a particularly easy transfer of the yarn from the groove of the grooved roller to the surface of the winding package is possible. Correspondingly, it is further preferred to move the yarn guide element in or along the direction of rotation of the grooved roller and/or against the direction of rotation of the winding package in order to lift the yarn from the groove of the grooved roller. In this way, the yarn guide element is moved between the yarn and the grooved roller in the direction of yarn travel, and as a result, only little friction or reduced friction compared to a fixed yarn guide element occurs between the yarn guide element and the yarn.

Basically, the method according to the invention can be used in any way to prevent incorrect traverse of the yarn. In this case, lifting of the yarn from the groove of the grooved roller by means of the yarn guide element can be carried out periodically, if necessary, when an incorrect traverse occurs or when winding the yarn in the edge region of the yarn package. In order to detect an incorrect traverse and/or to lift the yarn as required, the winding of the yarn and in particular the yarn position and/or the yarn tension in the yarn package or winding package are monitored, the method according to the invention being particularly preferably used in accordance with this preferred embodiment only if there is a need for this, i.e. if an incorrect traverse occurs. The monitoring can be carried out in any way. For example, optical monitoring, in particular by means of a camera, is conceivable. It is also possible to monitor the yarn tension, in particular by means of a yarn tension sensor, since in the case of an incorrect traverse, in particular when a lateral slippage occurs, a change in the yarn tension, in particular a sharp drop, occurs. It is also possible to monitor the yarn speed. This is because, when the yarn is guided correctly, the grooved roller imposes a known, predefined course on the yarn due to the geometry of the grooves, and this makes it possible to compare the course of the yarn speed with the known course and, if the deviation is large enough, to deduce an incorrect traverse of the yarn.

It is also possible, preferably, to periodically lift the yarn from the groove of the grooved roller, which is particularly suitable if the yarn is located in the edge region of the yarn package or winding package. For this purpose, the rotation speed of the grooved roller and/or the position of the yarn in the groove of the grooved roller can be monitored.

In a preferred development of the method according to the invention, when the thread is lifted out of the groove of the grooved roller, the thread guide element is moved along the circumference of the grooved roller just so that the thread is lifted out of the groove, in particular just completely, and then, particularly preferably, the thread guide element is immediately moved back at least so that the thread is guided by the groove again. In this way, on the one hand, incorrect traverses are prevented, and on the other hand, winding is only briefly hindered by the determined thread position, since the position of the thread lifted out of the groove cannot be determined completely.

Next, one embodiment of the method according to the present invention will be described in detail with reference to the drawings.

FIG. 2 is a perspective view showing a winding device for producing a yarn package. 2 is a schematic side view of a portion of the winding device shown in FIG. 1 with the yarn in the groove of the grooved roller; FIG. 3 is a schematic side view of the portion of the winding device shown in FIG. 2 with the yarn lifted out of the groove of the grooved roller by means of a yarn guide element; FIG.

The winding device 1 for producing the yarn package 2 shown in FIG. 1 is one of many identical working units arranged parallel to one another on a textile machine producing the yarn package 2, for example an automatic traverse winder. Each winding device of the winding device 1 is used to rewind a yarn supply bobbin 13 produced by a spinning machine, which has a relatively small amount of yarn material, into a large-volume winding package 4, usually into a yarn package 2.

To this end, the winding device 1 has a yarn package frame 3 that is supported so as to be pivotable about a pivot axis 18, on which the winding package 4 for forming the yarn package 2 can be arranged. The yarn package frame 3 is supported so that the winding package 4 can roll against the surface of the grooved roller 6 during the entire winding of the yarn 7, and the winding package 4 is driven by friction by the grooved roller 6.

The grooved roller 6 and the winding package 4 have parallel axes of rotation and rotate in opposite directions R1, R2. The axis of rotation 18 of the yarn package frame 3 also runs parallel to both axes of rotation. The grooved roller 6 has a single groove 9 on its surface that is angled to the axis of rotation and runs from one end of the grooved roller 6 to the other and back again, and crosses itself several times in its extension on the surface of the grooved roller 6. The groove 9 is provided to accommodate the yarn 7 to be wound, the yarn 7 being deflected along a portion of the grooved roller 6 before winding and thus determining the position at which the yarn 7 is wound on the surface of the winding package 4.

The yarn 7 unwound from the yarn supply bobbin 13 is guided to the center of the grooved roller 6 by means of a feeder 8, which is formed as a substantially closed yarn channel 11. Along the yarn channel 11, in the yarn running direction 5 from the yarn supply bobbin 13 to the winding package 4, a yarn tensioner 12, a yarn clearer 14 and a yarn tension sensor 17 as well as the grooved roller 6 are arranged.

The upper end of the supply device 8 is formed as a yarn suction device 15 and is connected to this end via a suction pipe piece 16 to a vacuum cross beam 20 which extends across all working units of the textile machine, each of which has a winding device 1. Furthermore, adjacent to the yarn suction device 15, a yarn splicing unit 19 is arranged on the supply device 8, by means of which the part of the yarn 7 already wound onto the yarn package 2 can be spliced onto the yarn 7 of a newly supplied yarn supply bobbin 13.

To produce the yarn package 2, the yarn 7 to be wound is first fed from a yarn supply bobbin 13 by means of a feed device 8 to the grooved roller 6, where the yarn 7 runs in the grooves 9 in the surface of the grooved roller 6 and is thereby redirected along a portion of the surface of the grooved roller 6 to a predefined position in the winding package 4 (see FIG. 2). The upper end of the feed device 8, which is formed as a yarn suction device 15, usually has a yarn guide element 10 arranged below the grooved roller 6 and a pivoting metal sheet 21 arranged above the grooved roller 6, the yarn guide element 10 and the pivoting metal sheet 21 keeping the upper opening of the feed device 8 small so that, for example, an effective suction of the textile fibers can take place. For this purpose, the yarn guide element 10 and the pivoting metal sheet 21 are formed as a suction nozzle shield extending along the surface of the grooved roller 6.

If the yarn 7 reaches, and in particular exceeds, the edge region of the yarn package 2 during winding, this results in the formation of an undesirable abschlag. In the method according to the invention, the yarn guide element 10 is moved parallel to the surface of the grooved roller 6 so that the yarn 7 is lifted from the groove 9 in the surface of the grooved roller 6 (see FIG. 3). Due to the yarn tension and the arrangement of the end of the feed device 8 in the center of the grooved roller 6, the incorrectly traversed yarn 7 which forms the abschlag is no longer held in its position by the groove 9 for long and is pulled towards the center of the grooved roller 6, so that the abschlag or other incorrect traverse can be eliminated again.

The yarn guide element 10 is then immediately moved back into its normal position, in which it is no longer in contact with the yarn 7, and as a result the yarn 7 again runs in the groove 9 of the grooved roller 6.

REFERENCE SIGNS LIST 1 winding device 2 yarn package 3 yarn package frame 4 winding package 5 yarn running direction 6 grooved roller 7 yarn 8 feeding device 9 groove 10 yarn guide element 11 yarn passage 12 yarn tensioner 13 yarn supplying bobbin 14 yarn clearer 15 yarn suction device 16 suction tube piece 17 yarn tension sensor 18 pivot axis 19 yarn splicing unit 20 negative pressure cross beam 21 pivoting metal sheet R1 rotation direction of grooved roller R2 rotation direction of winding package V movement direction of yarn guide element

Claims (11)

A method for operating a winding device (1) for producing a yarn package (2) comprising a yarn package frame (3) for rotatably holding a winding package (4), a grooved roller (6) arranged upstream of said winding package (4) in the yarn running direction (5) for positioning a yarn (7) when it is wound onto said winding package (4), and a feeding device (8) for feeding the yarn (7) to be wound onto said grooved roller (6), comprising the following method steps:
- a method step of feeding said thread (7) under thread tension to said grooved roller (6) by means of said feeding device (8),
- a method step of winding the yarn (7) onto the winding package (4) arranged on the grooved roller (6), the position of the yarn (7) on the winding package (4) being determined by the grooves (9) of the grooved roller (6),
A method comprising:
- in order to prevent incorrect traverse of the yarn (7) in the winding package (4), a yarn guide element (10) extending across the width of the grooved roller (6) and pivotably supported parallel to the surface of the grooved roller (6) can be moved between the yarn (7) to be wound and the grooved roller (6) in such a way that the yarn (7) is at least partially lifted out of the grooves (9) of the grooved roller (6) and pulled by yarn tension from the edge region of the yarn package (2) in the direction of the yarn package center. the yarn is fed into a yarn passage (11) with a closed yarn path against a negative pressure and/or an air flow directed against the yarn running direction (5), the yarn guide element (10) being part of a suction nozzle shield which can move around the grooved roller (6),
The method of claim 1. the yarn tension is generated by a yarn tensioner (12) arranged in the yarn running direction (5) of the feeding device (8) upstream of the grooved roller (6), and the feeding device (8) is arranged upstream of the center of the grooved roller (6) in such a way that the yarn (7) lifted from the groove (9) by means of the yarn guide element (10) is pulled towards the center of the grooved roller (6) and/or the winding package (4).
3. The method according to claim 1 or 2. driving the winding package (4) by the grooved roller (6) by friction, so that the winding package (4) and the grooved roller (6) roll against each other;
4. The method according to claim 1 , The winding package (4) and the grooved roller (6) are driven in opposite rotation directions (R1, R2).
5. The method according to any one of claims 1 to 4. moving the yarn guide element (10) along the direction of rotation (R1) of the grooved roller (6) and/or counter to the direction of rotation (R2) of the winding package (4) in order to lift the yarn (7) out of the groove (9) of the grooved roller (6),
The method of claim 5 . lifting the yarn (7) from the grooves (9) of the grooved roller (6) by means of the yarn guide elements (10) periodically, if necessary, in the event of an incorrect traverse or during winding of the yarn (7) in the edge region of the yarn package (2).
7. The method according to any one of claims 1 to 6. monitoring the yarn position and/or yarn tension in the winding package (4) to identify incorrect traverses and to lift the yarn (7) if necessary;
8. The method according to any one of claims 1 to 7. monitoring the number of revolutions of the grooved roller (6) and/or the position of the yarn (7) in the groove (9) of the grooved roller (6) for periodic lifting of the yarn (7) from the groove (9) of the grooved roller (6) by means of the yarn guide element (10);
9. The method according to any one of claims 1 to 8. Upon lifting of the thread (7) from the groove (9) of the grooved roller (6), the thread guide element (10) is moved along the circumference of the grooved roller (6) to such an extent that the thread (7) is just lifted from the groove (9), and then immediately the thread guide element (10) is moved back at least to such an extent that the thread (7) is again guided by the groove (9).
10. The method according to any one of claims 1 to 9. A winding device (1) for producing a yarn package (2), comprising:
- a yarn package frame (3) for rotatably holding a winding package (4) for winding a yarn (7) onto said yarn package (2);
a grooved roller (6) with grooves (9) for positioning the yarn (7) during winding onto the winding package (4) arranged upstream of the winding package (4) in the yarn running direction (5), and a feed device (8) for feeding the yarn (7) to be wound onto the grooved roller (6), the feed device (8) having a yarn tensioner (12) for feeding the yarn (7) under yarn tension,
In the winding device (1),
a winding device (1) characterized in that a yarn guide element (10) extending beyond the width of the grooved roller (6) is supported pivotably parallel to the surface of the grooved roller (6) in order to be moved between the yarn (7) to be wound and the grooved roller (6) and to be able to lift the yarn (7) out of the grooves (9) in order to prevent the yarn (7) from slipping off in the area of the end faces of the winding package (4).