JP6448286B2 - How to operate a textile machine work station that produces a trample package - Google Patents

Description

  The present invention relates to a method for determining the package diameter of a traverse package, in which a textile machine that manufactures the traverse package travels toward the traverse package and a package frame for holding the rotatable traverse package. A defined and controllable yarn traversing device for traversing the yarn being traversed and a defined and controllable drive device for rotating the traversing package, They are independent of each other, and the number of rotations of the package driving roller and the number of rotations of the traversing package are detected, and the ratio and, finally, the theoretical traversing package diameter is calculated from the number of rotations, The present invention relates to a method for obtaining a package diameter of a wound package.

  Textile machines for producing traversed packages are known in the art and in principle have a number of similar work points, ie work stations, arranged side by side in series. For example, at these work stations of a winder, a spinning cup with relatively little yarn material is rewound to form a large volume traverse package. However, such a winding station is also provided in other textile machines, for example rotor spinning machines, friction spinning machines or pneumatic spinning machines. This separate textile machine allows winding of the traverse package in connection with the spinning station. In this case, the yarn supplier is a corresponding spinning station instead of the storage bobbin.

  Each of the work stations has a different yarn handling device or yarn monitoring device and a winding station computer connected to these yarn handling devices or yarn monitoring devices. The individual winding station computers themselves are preferably connected to the central control unit of the traversing machine via bus lines.

  In order to produce a traverse package, also called a “take-up package” in the winding process, one must have the take-up package rotated and the other run towards the take-up package. The thread being threaded must be traversed, ie reciprocated, along the take-up package axis. Traverse winding can be achieved by a relatively quick traverse of the yarn. This means that the winding package of the work station of the winder is driven on the peripheral surface by a so-called “package drive roller”.

  A yarn guide, separately and separately driven or incorporated in a package drive roller, guides the yarn back and forth to traverse in front of the traverse package. As a result, at the time of winding, each succeeding layer crosses the already wound yarn and crosses the yarn giving the designation to the traverse package.

  The twill roll package is an intermediate product. This intermediate product is processed in a subsequent production process of fiber production. Therefore, high quality requirements are imposed not only on the yarn but also on the structure of the twill package.

  During manufacture, the yarn is initially wound up continuously into an empty package tube, which gradually increases the traverse package, for example, until it reaches a set diameter. Compared to the diameter of the traverse package, the amount of yarn supplied per revolution of the traverse package is extremely small. The diameter of the traverse package is an important characteristic quantity. This characteristic quantity is used, in part, to end the winding process when a certain set diameter is reached, or, in another, during winding of the winding package. Used to perform process interventions, which results in an effective package having, for example, a geometric edge shape that is as constant as possible.

  German Offenlegungsschrift 10 2009004615 discloses a winding device for textile machines for producing take-up packages and a method for operating the winding device. The winder described in the specification has a package driving roller and a yarn traversing device that are driven independently of each other. To determine the traverse package diameter, the rotational speed of the traverse package and the rotational speed of the package drive roller are measured and transmitted to the work station computer. From the measured number of rotations and the known diameter of the package drive roller, the diameter of the traverse package can be calculated.

  The known prior art methods have been found to be disadvantageous because of the system resulting in measurements that are larger than the actual diameter of the twill package. This is because a slip that deteriorates the measured value occurs between the package driving roller and the traverse package. The diameter value including the error thus determined can cause problems in the winding process, for example during high-speed operation or in geometric edge shapes.

  German Patent No. 3703869 specifically monitors the winding process with the aim of recognizing the so-called “ribbon winding zone” and implementing a ribbon winding prevention method to prevent or reduce ribbon winding. A method and apparatus for controlling and / or controlling is disclosed. This is necessary in the specification. This is because the yarn guide is incorporated in a package drive roller, a so-called “grooved drum”, and during the winding process, the rotation speed of the package drive roller and the rotation speed of the traverse package are automatically different integers. This is because a double is formed. This appears on the wound ribbon.

  In the ribbon winding prevention method described in German Patent No. 3703869, the drive motor of the package drive roller is switched on and off alternately, whereby acceleration with slip between the package drive roller and the traverse package is achieved. The stage and the inertial rotation stage without slip are continuous.

  Switching between the acceleration phase with slip and the inertial rotation phase without slip achieves ribbon winding prevention, i.e., a wound ribbon that becomes an obstacle during later payout of a traverse package manufactured with constant traverse winding It is done for the purpose of avoiding.

  In this case, the cycle of the package driving roller and the cycle of the traverse package are continuously measured. The evaluation is performed so that a quotient that is compared with a comparison value, particularly with a target value, is formed from the measurement result at least at a stage without slipping. When a deviation occurs from the target value, intervention in the winding process is performed.

  Therefore, the evaluation is performed by a measurement result based on the inertial rotation stage. This is because the slip is approaching zero here. On the other hand, in the acceleration stage, the slip is remarkably large, thereby deteriorating the value to be calculated.

  In the inertial rotation stage, in the case of a cylindrical traverse package, driving without slip is performed. In the case of a conical traverse package, during the inertial rotation stage, as viewed in the axial direction, on the surface of the traverse package, from the largest traverse package diameter to the smallest traverse package diameter, the so-called “driven” is driven. "Diameter" moves. The diameter of the driven winding package is such that the circumferential speed of the winding package matches the circumferential speed of the package driving roller. As a rule, even in the case of a conical twill package, the inertial rotation phase is regarded as a non-slip phase.

  In this case, a comparison of quotients formed in succession confirms whether a step with slip or a step without slip exists. This is because the continuous quotient changes only slightly when there is no slip.

  Unlike a German Patent No. 3703869, a winding machine in which the yarn guide is driven separately does not require the ribbon winding prevention method. Ribbon winding is prevented by intentional control of the traversing speed of the yarn traversing device.

German Patent Application Publication No. 102009004615 German Patent No. 3703869

  It is an object of the present invention to improve the method for determining the package diameter of a traverse package at a winding station with a separate drive for the yarn guide to enable accurate and continuous detection of the actual traverse package diameter. Is to be.

  In order to solve this problem, in the method according to the present invention, the package drive roller is periodically switched on and off, and the rotational speed of the package drive roller and the traverse winding package during the inertial rotation stage in which the package drive roller is not driven. , And the ratio and finally the actual traverse package diameter is calculated from both rotations.

  In a preferred embodiment of the method according to the present invention, the traverse package diameter is interpolated during timed measurements.

  In a preferred embodiment of the method according to the present invention, the actual slip value is calculated from the traverse package diameter during the slip phase in which the package driving roller is driven and the traverse package diameter during the inertial rotation phase.

  In a preferred embodiment of the method according to the present invention, the package driving roller driving device is corrected based on the actual slip value.

  In a preferred embodiment of the method according to the invention, the amount of wax applied is monitored based on the actual slip value.

  Due to the relatively small mass of the package drive roller, synchronization to the traverse package is quickly achieved during the inertial rotation phase. The switch-off time required for this is in the order of less than 1 second, in particular less than 0.5 seconds, and is sufficient to determine an accurate and slip-free traverse package diameter.

  Conventionally, the calculation is performed based on a rotation speed ratio between the package driving roller and the traverse package during winding. As a result, only the theoretical winding package diameter larger than the actual one could be calculated. This is because slip always occurs between the package drive roller and the traverse package, and this slip deteriorates the result.

  As described in claim 2, the traverse package diameter is interpolated during timed measurements.

  As the cycle, a cycle of 5 to 10 seconds is practical, but different cycles are possible. In order to stick to the 5-10 second cycle described as an example, this means that every 5-10 seconds, the drive of the package drive roller is switched off, and in this inertial rotation phase the actual presence of the trawl package This means that a diameter to be obtained is required.

  Interpolation of the individual traverse package diameters determined periodically provides a very accurate and continuous course of the traverse package diameter throughout the entire winding process. This has a positive effect on the winding process and the quality of the twill package. This is because the adjustments or interventions in the winding process required during the manufacture of the traverse package can be adapted to the actual traverse package diameter according to the invention.

  In an advantageous embodiment, the actual slip value is calculated from the traverse package diameter during the slip phase in which the package drive roller is driven and the traverse package diameter during the inertial rotation phase, as claimed in claim 3. The

  A further advantage of the solution according to the invention is that the current slip value of the winding station can be determined during the inertial rotation phase described above by comparing the diameter value with slip and the diameter value without slip with each other. Is provided.

  According to the fourth aspect, the package driving roller driving device is corrected based on the actual slip value.

  Since the slip value is known, the winding speed can be adjusted more accurately in consideration of this value. Furthermore, it is possible to ensure that the settable slip value is not exceeded.

  In a preferred embodiment, the amount of wax applied is monitored based on the actual slip value as claimed in claim 5.

  It is also possible to monitor the amount of wax applied over the entire winding process. For example, as the amount of wax applied decreases, the slip value also decreases. Defects in waxing, such as exhausting the wax roller, can be eliminated before the unwaxed yarn is wound up.

1 is a schematic view of one winding station of a textile machine for producing a traverse package, comprising a traverse package that is individually motor driven on a peripheral surface and a separate yarn guide that is individually motor driven. FIG. 1 is a front view of one winding station of a textile machine that manufactures a twill package; FIG.

  In the following, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 schematically shows a side view of a textile machine 1 for producing a twill package, in the form shown, one winding station 2 of a so-called “winder”.

  As is known, such a winder 1 has a number of such winding stations 2 between its end frames (not shown).

  Since these winding stations 2 are also well-known and will not be described in detail, the spinning cup 3 produced by the preceding ring spinning machine is rewound to form a large volume traverse winding package 5. After completion of the traversing package 5, it is delivered to a machine-length traversing package transport device 7 by a maintenance unit (not shown), for example, a traversing package exchanger, and a package loading station arranged on the machine end side or It is transported to something similar.

  Furthermore, such a winder 1 often has a logistic device in the form of a bobbin / winding tube transfer system 6.

  In this bobbin / winding tube conveyance system 6, a conveying plate 11 supporting the spinning cup 3 or the empty tube circulates.

  Of the bobbin / winding tube transport system 6, FIG. 1 shows only a cup supply section 24, a storage section 25 that can be driven in reverse, a lateral transport section 26 that leads to the winding station 2, and a winding pipe return section 27. .

  The individual winding stations 2 are known and therefore only schematically illustrated, but each has a different arrangement. These devices guarantee an orderly operation of such a work station 2.

  One of these devices is, for example, a winding device labeled 4. The winding device 4 includes a package frame 8 that is movably supported around a turning shaft 12.

  In the form shown in the figure, the winding package 5 is placed on its surface 31 on a driving device whose rotation speed can be adjusted, that is, a so-called “package driving roller 9” during the winding process. Entrained, ie driven, through the connection.

  However, in an alternative embodiment, the traverse package 5 may be driven via a drive device that is arranged directly on the package frame 8 or built into the package frame 8.

  The traversing of the yarn 16 during the winding process is performed by the yarn traversing device 10.

  Such a yarn traversing device 10, which is only schematically shown in FIG. 1, has a yarn guide 13 formed in a finger shape. The yarn guide 13 is driven by an electromechanical drive device 14 to reciprocate the yarn 16 between both end surfaces 32 of the traverse package 5 as shown in FIG.

  As is further apparent from FIG. 2, the drive device 14 has a motor shaft 33. A thread guide 13 formed in a finger shape is disposed on the motor shaft 33 so as not to be relatively rotatable.

  Further, the winding station 2 is arranged in a region of the yarn clearer 22 connected to the winding station computer 28 via the signal line 29 and the yarn clearer 22, and is arranged on the winding station computer 28 via the line 30. And a yarn cutting device 23 that can be controlled by

  Furthermore, in an advantageous embodiment, a yarn tension sensor 20 connected to the winding station computer 28 via a signal line 21 is provided.

  As shown in FIG. 2, during a regular winding operation, from one spinning cup 3 which is arranged on the transport plate 11 and positioned in the region of the lateral transport section 26 at the feeding position, 16 is drawn out and wound up to form a large volume twill package 5. This traverse package 5 is rotatably held between the two support arms of the package frame 8 during the winding process.

  At that time, the traverse package 5 is placed on the package driving roller 9 on the surface 31 thereof.

  The package driving roller 9 is regulated and can be driven by an electromagnetic driving device 34 connected to a winding station computer 28 via a control line 19 and drives the traverse package 5 in a frictional manner.

  The yarn 16 crosses at least the yarn clearer 22 and the yarn cutting device 23 on the way to the traverse package 5.

  The yarn 16 traveling while the yarn defect is monitored by the yarn clearer 22 generates a particularly dynamic yarn traveling signal within the yarn clearer 22. This yarn traveling signal is transmitted to the winding station computer 28 via the signal line 29.

  As long as the package driving roller 9 is driven by the driving device 34, the winding station computer 28 detects not only the rotational speed of the package driving roller 9 but also the rotational speed of the traverse package 5, and the theoretical result is accompanied by slip. The traverse package diameter is calculated.

  With the method according to the invention, the drive 34 of the package drive roller 9 is switched off every 0.5 seconds for 0.5 seconds. In this inertial rotation stage, synchronization with almost no slip is achieved between the package driving roller 9 and the traverse package 5. When this synchronization occurs, the rotational speed of the package driving roller 9 and the rotational speed of the traverse package 5 are detected by the winding station computer 28, and the actual traverse package diameter is calculated.

  The slip value is calculated from the traverse package diameter thus obtained.

  The numerical value between the actual winding package diameters determined every 5 seconds is calculated by interpolation, so that according to the present invention, accurate and stable with respect to the winding package diameter during the entire manufacturing process of the winding package 5 Information can be provided.

DESCRIPTION OF SYMBOLS 1 Textile machine 2 Winding station 3 Spinning cup 4 Winding device 5 Traverse winding package 6 Bobbin and winding tube conveyance system 7 Traverse winding package conveyance device 8 Package frame 9 Package drive roller 10 Yarn traverse device 11 Conveying plate 12 Rotating shaft 13 Yarn Guide 14 Drive device 16 Thread 19 Control line 20 Thread tension sensor 21 Signal line 22 Thread clearer 23 Thread breaker 24 Cup supply section 25 Storage section 26 Lateral conveyance section 27 Winding pipe return section 28 Winding station computer 29 Signal line 30 Line 31 Surface 32 End surface 33 Motor shaft 34 Drive device

Claims (5)

A package frame (8) for determining a package diameter of a traverse package (5), wherein the textile machine (1) for producing the traverse package (5) holds the rotatable traverse package (5). ), A defined and controllable yarn traversing device (10) for traversing the yarn (16) traveling towards the traversing package (5) and the yarn traversing device (10) A drive device (14) and a defined and controllable drive device (34) for rotating the traversed package (5), both drive devices being independent of each other and package drive The number of rotations of the roller (9) and the number of rotations of the traverse package (5) are detected, and the ratio of both the numbers of rotations and finally the theoretical traverse winding package diameter is calculated from both the numbers of rotations. Ayaki roll A method for determining the package diameter di,
The package drive roller (9) is periodically switched on and off,
The package driving roller (9) in the inertial rotation phase which is not driven, and detects the number of rotations and traverse winding package of the package driving roller (9) (5), from both the rotation speed, the ratio of both speed and Finally, the actual diameter of the traverse package is calculated, and the method of determining the package diameter of the traverse package. The method of claim 1 wherein the traverse package diameter is calculated by interpolation during the actual traverse package diameter calculation performed at intervals in time.   2. The method according to claim 1, wherein the actual slip value is calculated from the traverse package diameter during the slip phase in which the package drive roller (9) is driven and the traverse package diameter during the inertial rotation phase.   4. The method as claimed in claim 3, wherein the drive of the package drive roller (9) is corrected on the basis of the actual slip value.   4. The method of claim 3, wherein the amount of wax applied is monitored based on the actual slip value.

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