JP7463063B2 - Method or device for influencing the winding state of a ring spinning cop - Google Patents

Description

The present invention relates to a method or device for influencing the winding state of a ring spinning cop produced according to a spinning program set in a spinning unit of a ring spinning machine, which rewinds the ring spinning cop into a twill package in a working unit of a winding machine arranged downstream in the production process, while constantly monitoring the yarn exiting the ring spinning cop, recording yarn defects and clearing out any yarn defects exceeding a set limit value.

Methods and apparatus for producing ring-spun cops which are subsequently rewound into a twill package have long been known and are described in detail in numerous patent specifications.

A textile machine for producing ring spinning cops, so-called ring spinning machines, usually has a number of working units, so-called spinning units, in the area of its long machine sides. These working units, which are often identical, each have different working elements, which are supported either stationary or vertically shiftable. On each of the long machine sides of such a ring spinning machine, for example, a drafting device for drafting the feed material prepared by the yarn feed bobbins and a stationary spindle rail for receiving the rotatably supported ring spinning spindles are provided. The yarn feed bobbins are preferably suspended in a creel row of creels arranged above the ring spinning machine. Such a textile machine further has a vertically shiftable ring rail for receiving the spinning ring and the ring traveler, a rail for the balloon limiting ring and a rail for the yarn guide. In the region of the spinning ring, a so-called individual yarn monitor can also be installed in each case, which monitors the rotation of the ring traveler and detects if a yarn break has occurred in the ring spindle or if the ring traveler is rotating at too low a speed.

The structural elements of the ring spinning machine, which are supported so as to be vertically shiftable and which usually have the machine length, are driven and controlled by a corresponding drive mechanism and serve, in conjunction with the ring spinning spindles which are rotatably supported on the spindle rail, to spin a respective yarn from the yarn supply material and to wind this yarn onto the ring spinning cop in accordance with a settable spinning program.

Since the ring spinning cops produced in such a working unit of the ring spinning machine have a relatively small yarn volume, they are rewound into a large-volume traverse package in a subsequent working process in the working unit of the winding machine. During this rewinding process, the yarn leaving the ring spinning machine is constantly monitored for yarn defects, and yarn defects that exceed a settable limit value are cleared out.

The working units of such winding machines are equipped for this purpose with various yarn handling or processing devices. The working units of such winding machines each have, for example, a winding device arranged in the upper machine area, on which the traverse package is supported during the rewinding process and is rotated, for example by friction, and a receiving device arranged in the machine base area, on which the spinning cop can be functionally positioned for rewinding. Furthermore, the working units of such automatic traverse winders each have, in particular, a yarn tension sensor, a yarn tensioner and an electronic yarn clearer, with all yarn monitoring devices being connected to a so-called working unit computer, which is in turn connected to the central control unit of the automatic traverse winder via a machine bus or the like. Here, like other yarn handling or processing devices, electronic yarn clearers are also known from many patent applications.

As already mentioned, during the rewinding process, the yarn drawn off from the ring spinning cop runs through, in particular, an electronic yarn clearer on its way to the traverse package, which continuously monitors the running yarn for yarn defects during the rewinding process, for example for thick spots, thin spots, fuzz, yarn impurities, etc. If the yarn clearer detects a yarn defect exceeding a set limit value, this is notified to the working unit computer, which acts to immediately clear out the yarn defect and replace it with a yarn splice that is approximately equal to the original yarn. The yarn defects detected by the electronic yarn clearer are further transmitted from the working unit computer to the central control unit of the winding machine.

As is further known in connection with the operation of automatic traverse winders, the winding speed at which the working units of the winding machine are operated is limited by various physical givens, in particular by the yarn tension occurring during the rewinding process. That is, during the rewinding process, in which the yarn is preferably pulled out of the ring spinning cop via the head with the aid of a rotating yarn balloon, the yarn tension starts from a relatively small value at the beginning of the package formation process and increases strongly during the course of the package formation process, so that in the last third of the package formation process, if no effective countermeasures are taken, the yarn tension can grow to several times the initial yarn tension, which significantly increases the risk of yarn breakage.

Furthermore, if the winding onto the ring spinning cop has problematic areas, i.e. areas that cause a strong increase in yarn tension, the yarn tension may fluctuate strongly during the rewinding process on the ring spinning cop.

Since yarn breakage and strongly fluctuating yarn tensions have a detrimental effect on the quality of the twill package, a wide variety of methods and devices have already been developed in the past aimed at improving the payout characteristics of ring spinning cops.

For example, in the device or method described in CH-PS 669177, the winding speed and therefore the yarn withdrawal speed are adjusted as a function of the amount of residual yarn present in the ring spinning cop. In this known device, the winding is initially carried out at a relatively high winding speed at the beginning of the package formation process, but the winding speed is significantly reduced to a non-critical level during the last third of the package formation process.

Although this known method does indeed allow the limiting of the continuously increasing yarn tension during the package formation process without corresponding measures and thus a significant reduction in yarn breakage, it also results in a significant reduction in the winding speed, which in turn results in a relatively low average winding speed, which has a detrimental effect on the efficiency of such a winding machine.

Furthermore, DE 4306095 A1 discloses a combined ring spinning cop and winding machine system, in which state data of the produced ring spinning cops are determined in the ring spinning machine. These state data are then transmitted to the winding machine, where the processing of each individual ring spinning cop fed from the ring spinning machine to the winding machine is adapted to the state data determined during the production of the corresponding ring spinning cop in the ring spinning machine. As such state data, for example, the number of thread breaks occurring during the production of the corresponding ring spinning cop is counted.

Starting from the above-mentioned prior art, the problem underlying the present invention is to develop a method and a device that can influence the winding state of a ring spinning cop produced in the working unit of a ring spinning machine so that the ring spinning cop has the best possible running characteristics during subsequent rewinding in the working unit of a winding machine.

According to the invention, this problem is solved in that data determined by the working unit of the winding machine during the rewinding process of the ring spinning cop, which data corresponds to a yarn defect in the ring spinning cop, is fed back to the control device of the associated ring spinning machine and used to optimize the winding state of the new ring spinning cop in this ring spinning machine.

Preferred embodiments of the method according to the invention or the device according to the invention are the subject of the dependent claims.

In this case, the method according to the invention has the following particular advantage: in the method according to the invention, the winding data, which are determined in the working unit of the winder during the rewinding process of the ring spinning cop and which indicate a not entirely normal winding state of the ring spinning cop, in particular problematic winding regions, are used in the spinning unit of the ring spinning machine to influence the subsequent winding process of the ring spinning cop with the aim of "improving the winding state". If it is determined by the working unit of the winder that the ring spinning cop produced in the working unit of the ring spinning machine arranged upstream has an intensified yarn defect in a certain winding region, the relevant information is transmitted to the control unit of the ring spinning machine, which then reacts by correspondingly modifying the adjusted spinning program.

Preferably, problematic winding areas of the ring spinning cop are determined from the yarn defects. The control device of the ring spinning machine serves, for example, to carry out corrective measures in the winding areas found to be problematic in subsequent ring spinning cops to be produced.

In a preferred embodiment, the rotational speed of the ring spinning spindle is somewhat reduced in winding areas where, for example, a ring spinning machine has been identified as having problems with ring spinning cops. By reducing the rotational speed of the ring spinning spindle in this desired manner, winding areas with ring spinning cop problems can be eliminated relatively simply and effectively. These winding areas can be improved in such a way that, during the subsequent rewinding of the ring spinning cop in the working unit of the winding machine, almost no yarn defects are recorded.

In an alternative method embodiment, which can also be used in combination with the method embodiment described above, the movement of the ring rail, which performs a double stroke, is varied in the winding area that has proven problematic during the winding phase of the ring spinning cop in the working unit of the ring spinning machine. By correspondingly adapting the movement of the ring rail, the winding condition of the ring spinning cop can also be significantly improved in the problematic winding area, which is then very positively noticeable when rewinding the ring spinning cop in the working unit of the winding machine. In this case, both the movement speed and the stroke size must be adapted.

In another preferred embodiment of the method, the spinning tension is additionally monitored in at least one of the working units of the ring spinning frame and the speed of the ring spinning spindle is corrected when a settable limit value is reached. Such additional monitoring of the spinning tension can, for example, prevent the occurrence of a relatively large number of thread breaks or thin spots during the production of ring spinning cops in the spinning units of the ring spinning frame due to excessively high spinning tension, which must be reworked in the working unit of the winding machine.

In a preferred embodiment, the data fed back from the winding machine controller to the ring spinning machine is combined with the pulses of the individual yarn monitors in the ring spinning machine controller and a database is built in order to optimize the winding state of the new ring spinning cop. The optimal spinning tension can be obtained from the pulses of the individual yarn monitors. Such a database can then be used to easily optimize the winding state of subsequent ring spinning cops.

The individual yarn monitors provide information about yarn breaks in the ring spinning machine, which subsequently cause yarn defects in the winding machine. Preferably, the winding speed in the winding machine's working unit is adapted in relation to the detected yarn breaks in the ring spinning machine. This facilitates clearing of the yarn defect in the winding machine.

The device for carrying out the method according to the invention is a ring spinning machine with a number of working units in which ring spinning cops are produced and wound according to a set spinning program. The ring spinning cops produced in the ring spinning machine are then rewound into a traverse package in a working unit of a winding machine arranged downstream in the production process, the yarn exiting the ring spinning cops being constantly monitored and the determined data being processed in the control device of the winding machine.

According to the invention, the control device of the winding machine is connected to the control device of the ring spinning machine via a bus system. Via this bus system, data determined in the working units of the winding machine during the rewinding process of the ring spinning cop, which corresponds to a thread defect in the ring spinning cop, can be fed back to the control device of the corresponding ring spinning machine. The control device of the ring spinning machine then converts the data for the subsequent optimization of the winding state of the ring spinning cop. Thus, such a combined system preferably includes at least one ring spinning machine with a number of spinning units for producing the ring spinning cop and at least one winding machine with a number of winding units, in which the ring spinning cop is rewinded into a traverse package. Furthermore, a control system is provided that feeds back data determined from the working units of the winding machine during the rewinding process and which corresponds, for example, to a thread defect in the ring spinning cop to the control unit of the ring spinning machine, so that the method according to the invention can be realized in a simple and inexpensive manner.

In yet another preferred configuration of the device, the control device of the ring spinning machine is connected to the drive of the ring spinning spindle and to the drive of the ring rail and is configured so that in winding areas that have been found to be problematic due to yarn defects, the rotational speed of the ring spindle and/or the movement of the ring rail, which in each case performs one double stroke, is corrected.

By reducing the rotation speed of the ring spinning spindle as desired, it is relatively easy to ensure that, for example, problematic winding areas of the ring spinning cop are effectively eliminated.

The occurrence of yarn defects during the manufacture of ring spinning cops can also be avoided or at least significantly reduced by adapting the movement of the ring rail of the ring spinning machine, which performs the double stroke, in winding areas that have proven problematic during the winding phase of the ring spinning cop.

By adapting the movement of the ring rail and reducing the rotational speed of the ring spindle, it is possible to prevent the occurrence of yarn defects in the problematic winding area of the ring spinning cop, which then have to be removed again by the winding machine.

In yet another preferred embodiment, an individual yarn monitor is additionally provided in at least one of the spinning units of the ring spinning machine and connected to the control unit of the ring spinning machine, which detects the current spinning tension during the production of the ring spinning cop. The individual yarn monitor is connected to the control unit of the ring spinning machine, which on the one hand records the presence of a yarn break or a so-called "crawler spindle" in the working unit and, on the other hand, corrects the speed of the ring spinning spindle when a settable limit value of the spinning tension is reached. By additionally monitoring the spinning tension in this way, it is possible to easily prevent problematic winding areas occurring due to too high a spinning tension during the production of the ring spinning cop, i.e. winding areas that may cause numerous yarn breaks or relatively many thin spots of the yarn, which have to be dealt with later in the working unit of the winding machine.

Next, the present invention will be described in detail with reference to the embodiment shown in the drawings.

FIG. 2 shows a schematic view of a spinning unit of a ring spinning machine during the manufacture of ring spinning cops; FIG. 2 shows a schematic diagram of the operating units of the winding machine during rewinding of the ring spinning cop into a traverse package. FIG. 3 shows a combined system consisting of a ring spinning machine with multiple spinning units as shown in FIG. 1 and a downstream arranged winding machine with an operating unit as shown in FIG. 2 .

Figure 1 shows a schematic side view of a spinning unit 50 of a ring spinning machine, generally designated by the reference numeral 30.

As is known, such a ring spinning machine 30 has a number of such usually identical working units, often also called spinning units 50, on each of the long sides of the machine.

In these spinning units 50, a relatively fine yarn 31 is spun from the yarn supply material, in this embodiment from roving bobbins 21 suspended on so-called creels 23, and the yarn 31 is wound onto a ring spinning cop 9. That is, the yarn 31 is wound onto a somewhat conical winding tube 34 that tapers from the winding tube base 16 to the winding tube tip 17.

During the spinning process, the empty tube 34 of the ring spinning cop 9 is fixed to a ring spindle 41, which is rotatably supported on a spindle rail 39, and a rotational force is applied to the warp 40 of the ring spindle 41 by a circulating tangential belt 42.

As is known, the spinning unit 50 of such a ring spinning machine 30 further comprises a ring rail 27, a balloon limiting body 43 and a yarn guide 36. The ring rail 27, the balloon limiting body 43 and the yarn guide 36 are supported so as to be vertically shiftable and can be moved up and down as determined by the drives 51, 52, 53. The spinning unit 50 of such a ring spinning machine 30 further comprises a drafting device 32, through which the sliver 48 taken out of the roving bobbin 21 runs, and the sliver 48 is then drafted several times. The drafted sliver 48 is twisted into the yarn 31 at the outlet of the drafting device by means of the rotating ring spinning spindle 41 or the ring traveler 33 dragged by the yarn. That is, the yarn 31 emerging from the draft device 32 passes through the yarn guide 36 and the balloon limiter 43, and then reaches the ring traveler 33, which is movably supported by the spinning ring 29, and the spinning ring 29 itself is fixedly mounted on the ring rail 27.

The rotation of the ring spinning spindle 41, to which a rotational force is applied by the tangential belt 42, serves to entrain the ring traveler 33 with the yarn 31 wound onto the ring spinning cop 9 and rotate it on the spinning ring 29.

Preferably, the rotation of the ring traveler 33 is further monitored by a so-called individual yarn monitor 49, which is connected via a signal line 54 to a control device 57 of the ring spinning machine 30, which is itself connected to a control device 56 of the winding machine 1 via a bus system 58.

The feed rate of the ring spinning machine 30 is determined by the rotation speed of the pair of feed rollers of the drafting device 32, which is set as the yarn length per unit time, e.g. by means of the feed meters per minute (m/min), so that the yarn length wound on the ring spinning cop 9 can be easily determined, e.g. from the feed rate and a time measurement. In order to determine the total yarn length on the ring spinning cop 9, yarn breakages occurring in the spinning unit 50 of the ring spinning machine 30 are further monitored and taken into account when determining the total yarn length.

The yarn breakage is preferably monitored via a so-called individual yarn monitor 49, which detects and records the movement of the ring traveler 33, which rotates during normal operation, when it stops in the event of a yarn breakage. That is, the total yarn length wound on the ring spinning cop 9, as well as the number of yarn breaks and the position of the yarn breaks, are detected and processed in the control device 57 of the ring spinning machine 30.

After the completion of one ring spinning cop 9 on the machine long side, the associated ring rail 27 is moved as quickly as possible in the direction of the tube base 16 in order to generate a minimum number of reserve windings in the ring spinning cop 9, and the doffing process is started after the installation of the so-called underwinding. That is, the completed ring spinning cop 9 is removed from the ring spinning spindle 41 of the ring spinning machine 30 by a doffing system (not shown) and transferred to the bobbin and tube transport system 3 of the combined system, shown in FIG. 3 and indicated by the reference number 60.

Figure 2 shows a side view of an operating unit 2 of a textile machine for producing twill packages, in this embodiment a winding unit of a so-called automatic twill winder 1. Such a winding machine 1 has several operating units 2 arranged likewise next to one another, in which a yarn supply bobbin, usually a ring spinning cop 9, is rewound into a voluminous twill package 15.

The ring spinning cops 9 reach the individual working units 2 via a bobbin/tube transport system 3, which connects the winding machine 1 to the ring spinning machine 30 arranged upstream. The bobbin/tube transport system 3, as known per se, thus comprises a number of transport sections, in which the ring spinning cops 9 or the empty tubes 34 are transported vertically oriented and inserted into the transport trays 8. The bobbin/tube transport system 3 has, for example, a cop supply section 4, a storage section 5, a transverse transport section 6 and a tube return section 7. In the region of the transverse transport sections 6, a pay-off position AS is arranged in each case, at which the ring spinning cop 9 provided for rewinding is locked. That is, the thread 31 is drawn off from the ring spinning cop 9 positioned at the pay-off position AS, and on the way to the traverse package 15, the thread 31 first passes the lower thread sensor 19, which is connected to the working unit computer 35 via a signal line. With such a lower thread sensor 19, it is checked after a winding interruption, for example after a thread break or a controlled thread clearing cut, whether the lower thread is present at all before the upper thread search is initiated, i.e. whether the introduction of the upper thread search is even necessary.

Above the lower thread sensor 19, a thread tensioner 18 is arranged, which has, for example, two brake discs that apply a light clamping pressure to the running thread 31. The thread tensioner 18 is also connected to the operating unit computer 35 via a control conductor.

In addition, a yarn clearer 37 with a yarn cutting device is arranged in the region of the yarn path. With the aid of this yarn clearer 37, the quality of the running yarn is constantly monitored during the rewinding process, the data determined by the yarn clearer 37 being fed via a signal line to the operating unit computer 35 for evaluation, which is connected via the bus system 11 to the control device 56 of the winding machine 1. In the event of a yarn defect exceeding a preset limit value, the operating unit computer 35 furthermore operates a yarn cutting device and the yarn 31 is cut.

Downstream of the yarn clearer 37 in the yarn running direction, there is further arranged a yarn tension sensor 38 and, in addition, often a paraffin applicator. The yarn tension sensor 38 is likewise connected to the operating unit computer 35 via a signal line. During the winding operation, the yarn tension of the running yarn 31 is constantly monitored using the yarn tension sensor 38, and the yarn tensioner 18 is controlled via the operating unit computer 35 in response to the yarn tension signal emitted by the yarn tension sensor 38. The brake disk of the yarn tensioner 18 thus applies a clamping pressure to the yarn 31, which ensures that an approximately constant yarn tension is produced in the running yarn 31, which ensures a uniform packaging density of the twill package 15 to be produced.

The traverse package 15 is rotatably held on the winding device 24, i.e. supported on a package frame 28 which is supported rotatably via a winding tube (not shown in detail) and pivotable within a limited range around the axis of rotation 22, and rests on its outer periphery on a package drive roller 14, which is driven, for example, by a separate motor, and which frictionally drives the traverse package 15. Furthermore, in the region of the package drive roller 14, a yarn traverse device 26 is provided which simultaneously traverses the yarn 31 to be wound, for example by means of finger yarn guides.

As shown in FIG. 2, the working unit 2 has a yarn splicing device 10, for example a pneumatically operated yarn splicer, outside the normal yarn runway, which is also connected to the working unit computer 35 via a signal line. The working unit 2 further includes a suction nozzle 12, which is supported for rotation within a limited range about the pivot axis 13 and can be supplied with vacuum, and a gripper tube 25, which is supported for rotation within a limited range about the pivot axis 20 and can also be supplied with vacuum. The gripper tube 25 serves to capture the yarn end of the lower thread connected to the ring spinning cop 9, which is usually held in the yarn tensioner 18 after the controlled yarn clearing cut or after the yarn breakage, and the gripper tube 25 serves to transfer this yarn end to the yarn splicing device 10.

The suction nozzle 12 serves to properly handle the yarn end of the upper yarn wound onto the twill package 15.

In the event of a yarn break under the yarn tensioner 18 or after the ring spinning cop 9 has been completely unwound, a so-called cop changeover is initiated by the lower yarn sensor 19 and a new ring spinning cop 9 is then positioned in the unwound position AS. If the ejected ring spinning cop 9 still has a residual wound yarn, it is fed to a residual cop preparation station 46 for residual cops, as will be described in more detail below in connection with FIG. 3, where the yarn end of the ring spinning cop 9 is newly prepared so that the residual wound yarn can also be unwound from the ring spinning cop 9 in one of the working units 2.

The completely unwound empty tube 34 is then fed back to the ring spinning machine 30 via the tube return section 7 of the bobbin/tube transport system 3.

Figure 3 shows a combined system, generally designated 60, of a ring spinning machine 30, with a winding machine 1 located downstream of the ring spinning machine 30 in the production process.

The combined system 60 has a bobbin/tube transport system 3, in which the ring spinning cops 9 produced in the spinning unit 50 of the ring spinning machine 30 are transported to the working unit 2 of the winding machine 1, and the unwound empty tubes 34 are transported back to the spinning unit 50 of the ring spinning machine 30. During transport, the ring spinning cops 9 and the empty tubes 34 are positioned vertically on the transport tray 8, as shown in FIG. 2. As can be seen from FIG. 3, the bobbin/tube transport system 3 has, in particular, a cop supply section 4 in the area of the winding machine 1, whereby a so-called cop preparation station 47 is often provided at the inlet side of the cop supply section 4. In the cop preparation station 47, the ring spinning cops 9 delivered from the ring spinning machine 30 on the transport tray 8 are prepared for the winding process, i.e. the yarn ends of the ring spinning cops 9 are prepared so that they can be easily captured in the working unit 2 of the winding machine 1. The prepared ring spinning cops 9 are then transported further via a branch section 44 to a reversibly operable storage section 5 and distributed from there to the transverse transport sections 6, which each have a so-called unwinding position AS in the area of the winding unit 2.

After the rewinding process is completed, the unwound empty tube 34 is then transported back to the spinning unit 50 of the ring spinning machine 30 via the rewinding tube return section 7.

If the yarn end of a new ring spinning cop 9 cannot be captured in the working unit 2 of the winding machine 1, for example because the yarn end was not correctly prepared in the cop preparation station 47, this ring spinning cop 9 is ejected from the corresponding working unit 2 and fed to the residual cop preparation station 46 for residual cops. That is, the ring spinning cop 9 that was not properly unwound is led via another branch section 45 to the residual cop preparation station 46 for residual cops and is prepared anew there. The prepared residual cop is then fed again via the storage section 5 and the transverse transport section 6 to the unwinding position AS in the area of the working unit 2.

The combined system 60 further comprises a control system, generally designated by the reference number 55. In the illustrated embodiment, the control system 55 comprises a control device 56 of the winding machine 1, a control device 57 of the ring spinning machine 30, and a bus system 58 arranged in between. That is, the control device 56 then typically comprises several subordinate control units, so-called working unit computers 35, which control the determined distributed process. The control device 56 of the winding machine 1 and the control device 57 of the ring spinning machine 30 then evaluate the sensor data and correspondingly control the associated actuators.

As already mentioned, the control devices 56, 57 are connected to each other by means of a bus system 58, so that the control device 56 of the winding machine 1 and the control device 57 of the ring spinning machine 30 can exchange data and parameters without any problems. The control devices 56 and 57 respectively enable the control of the winding machine 1 or the ring spinning machine 30 according to the parameters that have been set or that have been determined according to the invention.

The control device 57 of the ring spinning machine 30 determines from the data of the control device 56 of the winding machine 1 and the pulses of the individual yarn monitors 49 a corrected adjustment of the speed of the ring spinning spindle 41 and/or the movement of the ring rail 27, which in each case performs one double stroke. In this way, the winding state of the new ring spinning cop is optimized. This optimization is preferably carried out continuously, so that the process has the characteristics of a closed-loop control, i.e. the speed and/or the double stroke are adapted and the action on the yarn defect is monitored in the winding machine 1.

REFERENCE SIGNS LIST 1 Winding machine 2 Working unit 3 Bobbin/tube transport system 4 Cop supply section 5 Storage section 6 Transverse transport section 7 Tube return section 8 Transport tray 9 Ring spinning cop 10 Yarn splicing device 11 Bus system 12 Suction nozzle 13 Swivel axis 14 Package drive roller 15 Traverse winding package 16 Tube base 17 Tube tip 18 Yarn tensioner 19 Lower thread sensor 20 Swivel axis 21 Roving bobbin 22 Rotation axis 23 Creel 24 Winding device 25 Gripper tube 26 Yarn traverse device 27 Ring rail 28 Package frame 29 Spinning ring 30 Ring spinning machine 31 Yarn 32 Draft device 33 Ring traveler 34 Empty tube 35 Working unit computer 36 Yarn guide 37 Yarn clearer 38 Yarn tension sensor 39 Spindle rail 40 Warp 41 Ring spinning spindle 42 Tangential belt 43 Balloon limiter 44 Branching section 45 Branching section 46 Residual cop preparation station 47 Cop preparation station 48 Sliver 49 Individual yarn monitor 50 Spinning unit 51 Drive 52 Drive 53 Drive 54 Signal conductor 55 Control system 56 Control device 57 Control device 58 Bus system 60 Combined system AS Pay-off position

Claims (6)

1. A method for influencing the winding state of a ring spinning cop (9) produced according to a spinning program set in a spinning unit (50) of a ring spinning machine (30), comprising: rewinding said ring spinning cop (9) into a traverse package (15) in a working unit (2) of a winding machine (1) arranged downstream in the production process; continuously monitoring the yarn (31) emerging from said ring spinning cop (9), recording yarn defects and clearing out yarn defects exceeding set limit values,
feeding back data determined by the working unit (2) of the winding machine (1) during the rewinding process of the ring spinning cop (9) which corresponds to a yarn defect in the ring spinning cop (9) to a control device (57) of the associated ring spinning machine (30) and optimizing the winding state of a new ring spinning cop (9) in the ring spinning machine (30),
determining problematic winding areas of the ring spinning cop (9) from the yarn defects;
During winding on the ring spinning cop (9) in the ring spinning machine (30), the movement of a ring rail (27) supported in a shiftable manner along the axis of rotation of the ring spinning cop (9) is adjusted in a winding area that has been found to be problematic ,
Furthermore, in at least one of the spinning units (50) of the ring spinning machine (30), the spinning tension is additionally monitored during the production of the ring spinning cops (9) and, when a settable limit value of the spinning tension is reached, the number of revolutions of the ring spindle (41) is corrected in order to prevent the occurrence of thin spots in the yarn which require post-processing.
Method. during winding of the ring spinning cop (9) in the ring spinning machine (30), correcting the number of revolutions of the ring spinning spindle (41) in the winding area which has been found to be problematic;
The method of claim 1. the data fed back from the control device (56) of the winding machine (1) to the ring spinning machine (30) is combined in the control device (57) of the ring spinning machine (30) with pulses of an individual yarn monitor (49) of one spinning unit (50) of the ring spinning machine (30) and a database is constructed for optimizing the winding state of the new ring spinning cop (9).
3. The method according to claim 1 or 2 . optimizing the winding speed in the working unit (2) of the winding machine (1) in relation to a yarn breakage detected in the ring spinning machine (30);
4. The method according to claim 1 , 5. An apparatus for carrying out the method according to claim 1, comprising a ring spinning machine (30) having a number of spinning units (50), in which ring spinning cops (9) are produced and which are wound according to a set spinning program, and a winding machine (1) arranged downstream in the production process, in whose working unit (2) the ring spinning cops (9) are wound back into a traverse package (15), the yarn (31) emerging from the ring spinning cops (9) being constantly monitored and the determined data being processed in a control device (56) of the winding machine (1),
the control device (56) of the winding machine (1) is connected to a control device (57) of the ring spinning machine (30) via a bus system (58), so that data determined in the working unit (2) of the winding machine (1) during the rewinding process of the ring spinning cop (9) and corresponding to a yarn defect of the ring spinning cop (9) can be fed back to the control device (57) of the corresponding ring spinning machine (30) and can be used to optimize the winding state of a new ring spinning cop (9) in the ring spinning machine (30),
the control device (57) of the ring spinning machine (30) is designed to correct the movement of a ring rail (27) supported in a shiftable manner along the axis of rotation of the ring spinning cop (9) in a winding area that has been found to be problematic due to a yarn fault and is connected to a drive for the ring spinning spindle (41) and to a drive for the ring rail (27) ,
in at least one of the spinning units (50) of the ring spinning machine (30), an individual yarn monitor (49) is provided and connected to the control device (57) of the ring spinning machine (30), the individual yarn monitor (49) detects the current spinning tension during the production of the ring spinning cops (9), and the control device (57) corrects the number of revolutions of the ring spinning spindle (41) when a settable limit value of the spinning tension is reached, in order to prevent the occurrence of thin spots in the yarn that require post-processing.
Device. the control device (57) of the ring spinning machine (30) is designed to correct the rotational speed of the ring spindle (41) in a winding area that has been found to be problematic due to a yarn fault and is connected to a drive for the ring spindle (41) and to a drive for the ring rail (27),
6. The apparatus of claim 5 .