JP2016132574A - Method and device for evaluating yarn splicing part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency of a quality test of a yarn splicing part.SOLUTION: A method for evaluating a yarn splicing part on a work unit 2 of a textile machinery for producing a cross winding package 5, is configured so that, the work unit 2 comprises: a yarn splicing device 20 for performing yarn splicing to yarn end parts of two yarns 6 without a node part; a yarn clearer 22 for monitoring the yarns 6 traveling; a yarn cutting device 25 for cutting and removing yarn defects and yarn splicing parts positioned on out of a tolerance; and controllers 19, 32. The yarn splicing part which is detected as allowable, is cut by the yarn cutting device 25, and an operator can easily take out the cut yarn splicing part, and such a yarn cutting part is displayed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for evaluating a yarn splicing part in a working unit of a textile machine for manufacturing a twill package, wherein the working unit splics two yarn end parts without a knot. And a yarn clearer that monitors the traveling yarn, a yarn cutting device that cuts and removes yarn defects and yarn splicing portions that are outside the allowable error range, and a control device, and implements such a method. The present invention relates to a textile machine for manufacturing a twill winding package.

  In the textile industry, textile machines for producing various types of twill packages have been known for some time. In addition to the open-end rotor spinning machine, for example, a large number of winders are used.

  In the working unit of the winder, a spinning cup manufactured in a ring spinning machine and having only a relatively small amount of yarn material is rewound into a large volume traverse package. During this rewinding process, the yarn running from the spinning cup is further monitored for yarn defects, which are optionally cleared.

  Each of the work units of the winder is configured with a number of yarn handling devices and yarn processing devices, such as a yarn tensioner, a yarn tension sensor, a paraffin coating device, a yarn splicing device, and the like. In order to monitor the yarn to be performed, a so-called yarn clearer is provided.

  The yarn splicing device splices the yarn ends of two yarns so that the yarn section has substantially the same appearance and strength as the yarn.

  Furthermore, a number of work units each have one work unit computer, which is preferably connected to the central control unit of the textile machine, preferably via a bus system.

  As known and disclosed in, for example, Patent Document 1, a yarn clearer is described as a device for measuring thickness and / or mass, and this yarn clearer is formed in a yarn and a splicing device. The detected yarn splicing part is detected. For this purpose, the yarn clearer usually has a measuring head, and this measuring head senses irregularities of the traveling yarn, for example, a thick portion or a thin portion. The yarn clearer is connected to the yarn cutting device by an action coupling and controls the yarn cutting device. If the thickness or mass of the yarn or splice is outside the tolerance range, such so-called yarn defects are cut off. Further, this Patent Document 1 does not disclose how the limit value for the yarn clearer is input.

  Usually, in the central control unit of the textile machine, the sensitivity of the yarn clearer can be adjusted, i.e. whether the irregularity is evaluated as a defect can be preset in the center. The evaluation of the yarn defect includes the length of the thick portion or the thin portion in addition to the yarn diameter. If the irregularity is recognized and evaluated as a yarn defect based on the fact that a preset tolerance range has been exceeded, the yarn clearer performs a so-called clearing cut.

  Patent Document 2 describes a method for inspecting the breaking property and / or the elongation property of a yarn. In order to be able to omit manual removal of the yarn from the manufacturing process for measurements in the laboratory, tear inspection is incorporated into the manufacturing process. This method can also be used to inspect the splice. For this purpose, the yarn is moved further after the piecing operation so that the piecing location is located between the tensioning device and the traversing package. In this way, the error function of the splicer is recognized early. In Patent Document 2, no suggestion is given regarding the selection of the spliced portion to be inspected.

  A disadvantage of the apparatus disclosed in Patent Document 2 is that the configuration of each work unit is complicated and is correspondingly expensive. Neither the method nor the device has found potential for practical use.

  In order to inspect the quality of the splice, in particular the appearance and strength, in the field still, in order to inspect the splice, the splice is taken out of the production process and the so-called sample board (Muster-oder Vorfuehrkarte) Place on top and then inspect the splices offline. By manual operation, the manufacturing process is interrupted immediately after splicing.

  At this time, each piecing portion is removed from the manufacturing process, or the operator visually determines which piecing portion is pulled on the sample mount.

  This general purpose processing method has the disadvantage that it is not effective. This is because in this case also the splices that are outside the tolerance range and are therefore to be cut off from the yarn are also removed and inspected.

German Patent Application No. 4028465 European Patent Application No. 1235071

  Starting from the prior art described above, the object of the present invention is to improve the efficiency or efficiency of the quality test of the spliced part.

  This object is achieved according to the invention by the features of claim 1 for a method and by the features of claim 2 for a textile machine for producing traversed packages.

  Advantageous embodiments of the invention are the subject matter of the dependent claims.

  In order to solve the above-mentioned problem, according to the method of claim 1, the spliced portion that has been detected as being acceptable can be easily taken out by the operator using the yarn cutting device. Cut as possible and display such thread cuts.

  This ensures that only the splices that are not normally cut from the yarn are removed from the manufacturing process for further inspection. Yarn splices that are detected as unacceptable are subsequently cut from the yarn and discarded, as in the "normal" manufacturing process. The ability to remove only acceptable splices thereby provides two major advantages: on the one hand, only such splices are placed on the sample backing and remain on the normal thread. Inspected for strength, rolled up in a twill package and provided to the customer. On the other hand, the thread clearer adjustment can be evaluated by visual evaluation of the spliced portion pulled on the sample mount. For example, if the splice on the sample mount is too thick or too thin, this is evidence that the yarn clearer has been adjusted acceptably.

  According to the textile machine according to claim 2, which is an independent claim, the controller cuts the yarn so that the yarn cutting device cuts the spliced portion located within a preset tolerance so that it can be easily taken out. It is configured to control the device and the display means is controlled to signal such a thread cutting section.

  An advantage of the present invention is that the control device can select a test splicing selection program. When the irregularity is recognized and the value of the recognized irregularity is evaluated as a yarn defect based on exceeding a preset tolerance range, the yarn clearer, as usual, A so-called clearing cut is performed and the yarn defects are removed. However, when a piecing portion located within a preset tolerance range passes through the yarn clearer, the piecing portion is similarly cut for the duration of the test piecing selection program.

  When it is recognized that the yarn splicing portion is defective, the cutting is usually performed about 15 cm behind and the corresponding yarn portion is sucked out. If the yarn splice is detected as being good, the clearing cut must be made to ensure that the yarn splice can be removed relatively easily by the operator. Experiments have confirmed that this cut of an acceptable splice is particularly suitable when performed about 100 cm behind. However, the present invention is not limited to such dimensions. This is because other suitable dimensions for the defined clearing cut can also be obtained, for example in connection with the machine type.

  With the operation of the clearing cut, the signal device of each working unit that already exists in any case is controlled. The work unit therefore emits a signal, such as a green / yellow flashing light, which signals to the operator that the acceptable splice is cut and that this splice can be removed. Show.

  The control device for controlling the yarn cutting device may be a central control unit, a work unit computer, or a control unit incorporated in the yarn clearer. The individual control devices are connected to each other via a bus system, so that inputs can be made, for example, in the central control unit, and the central control unit can be configured with individual work unit computers or thread cutting devices as required Control.

It is a side view which shows the work unit of the textile machine which manufactures a twill winding package.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a side view of a working unit 2 of a textile machine for manufacturing a traverse package. This textile machine is a so-called winder 1 in the present embodiment.

  In the work unit 2, the spinning cup 3 is rewound onto the large volume traverse package 5 using the winding device 4. A traversing device 7 is provided for traversing the yarn 6 during the winding process. Such a traversing device 7 shown schematically in FIG. 1 is mainly composed of a thread guide 8 formed in a finger shape, and this thread guide 8 is driven by an electromechanical drive device 9. The yarn 6 is traversed between the both end faces of the traverse package 5.

  The traverse package 5 is delivered to the traverse package transporting apparatus 10 extending over the machine length after completion, and transported to a package charge station disposed on the machine end side or a similar place.

  The winder 1 further has a supply device (Logistikeinrichtung) formed as a cup / winding tube transport system 11.

  The winding device 4 has a package frame 12, and the package frame 12 is supported movably around a turning shaft 13. The package frame 12 may then further be pivotable about another axis arranged perpendicular to the pivot axis 13, for example to produce a conical winding package.

  During the winding process, the traversed package 5 is in contact with the supporting and pressing roller 14 on its surface, and this supporting and pressing roller 14 having no driving device is entrained by friction. In this case, the traversing package 5 is driven via a drive device capable of adjusting the number of revolutions, and this drive device is preferably formed as a DC motor that can be electronically commutated and arranged directly on the package frame 12. Or incorporated in the package frame 12.

  In an alternative embodiment, the traverse package 5 is in contact with a drive roller driven by a separate motor during the winding process. In this case, the traverse package 5 is entrained by friction by a driven roller.

  The yarn 6 is pulled out from the spinning cup 3 located at the winding position. The yarn 6 from the spinning cup 3 first passes the lower yarn sensor 16 on the way to the traverse package 5 in the yarn traveling direction 15. By means of this lower thread sensor 16, for example after a thread break or controlled clearing cut (Reinigerschnitt), the presence or absence of the thread 6 is checked. A thread tensioner 17 is disposed on the lower thread sensor 16. The thread tensioner 17 has a brake adjuster (not shown), and the pressure applied to the thread 6 traveled by the brake adjuster can be controlled by the work unit computer 19 via the signal line 18. it can.

  The aerodynamic splicing device 20 for splicing the yarn ends is arranged so that the splicing device 20 is located outside the yarn path during the winding operation. The splicing device 20 is similarly connected to the work unit computer 19 via a signal line 21.

  A yarn clearer 22 is arranged on a further route of the yarn running path in order to detect a yarn defect. The yarn clearer 22 is used to constantly monitor the quality of the running yarn, including the formed splices.

  The signal of the thread clearer 22 is transmitted to the work unit computer 19 via the signal line 23 for evaluation. The work unit computer 19 serves as an evaluation device. When a yarn defect occurs, the yarn cutting device 25 is operated from the work unit computer 19 via the signal line 24, and the yarn 6 is cut off.

  In the yarn traveling direction 15, a yarn tension sensor 26 and a paraffin coating device 27 are further disposed behind the yarn clearer 22. In this case, the yarn tension sensor 26 is likewise connected to the work unit computer 19 via the signal line 30. During a normal winding operation, the yarn tension sensor 26 is always used to monitor the yarn tension of the traveling yarn 6 and through the work unit computer 19 in accordance with the signal transmitted from the yarn tension sensor 26. The thread tensioner 17 is controlled. In other words, the brake adjuster of the thread tensioner 17 applies a crimping pressure to the thread 6, and this crimping pressure ensures that a preset thread tension is adjusted in the traveling thread 6, and this thread tension is completed. A desired structure is produced with respect to the package density of the wound package 5.

  The work unit 2 further has a suction nozzle 28 and a gripper tube 29. The gripper tube 29 serves to capture the part of the yarn 6 extending from the spinning cup 3, the so-called bobbin, which when uncontrolled yarn clearing is cut or when the yarn breaks on the yarn tensioner 17 Usually, it is held in the thread tensioner 17. The suction nozzle 28 serves to capture the portion of the yarn 6 wound up on the traverse package 5, a so-called upper yarn.

  Furthermore, the individual work unit computers 19 are connected to the central control unit 32 via a machine bus 33 which is shown schematically.

When yarn breakage occurs during the rewinding from the spinning cup 3 located at the rewind position to the traverse package 5, or the yarn is cut by the yarn cutting device 25 on the basis of a corresponding defect signal of the yarn clearer 22. And the unit of work computer 19 performs the following actions accordingly:
The package frame 12 is immediately lifted from the support and pressure roller 14 via a driving device (not shown). Further, the rotational movement of the traverse package 5 is braked and stopped by a package brake (not shown). The lower thread sensor 16 detects whether a lower thread is present. In the case of a positive signal from the lower thread sensor 16, the yarn end portion piecing process is started. When the yarn end splicing process is properly completed, the package frame 12 is then lowered again via the work unit computer 19, whereby the traversed package 5 comes into contact with the support and pressure roller 14. The winding process of the yarn 6 is continued, the yarn splicer passes the yarn clearer 22, and the yarn clearer 22 transmits a signal to the work unit computer 19.

  If the detected yarn splicing portion is within the allowable error range and the test yarn splicing portion selection program has been selected in advance, the yarn cutting device 25 is controlled via the signal line 24 and clearing cutting is performed 100 cm behind. Once implemented, the winding process is stopped. At the same time, a lamp (not shown) located in each work unit 2 is controlled to emit green / yellow flashing light. This flashing light signals the operator that the now acceptable splice has been cut for removal from the manufacturing process.

  Deviations located outside the tolerance limits are subsequently recognized during the test splicing selection program and removed using a clearing cut.

  DESCRIPTION OF SYMBOLS 1 Winding machine, 2 Work unit, 3 Spinning cup, 4 Winding device, 5 Traverse package, 6 Yarn, 7 Traverse device, 8 Yarn guide, 9 Drive device, 10 Package conveyance device, 11 Cup and winding tube conveyance System, 12 Package frame, 13 Rotating shaft, 14 Support and pressure roller, 15 Thread traveling direction, 16 Lower thread sensor, 17 Thread tensioner, 18 Signal line, 19 Work unit calculator, 20 Splicing device, 21 Signal line, 22 Thread clearer , 23 signal line, 24 signal line, 25 thread cutting device, 26 thread tension sensor, 27 paraffin coating device, 28 suction nozzle, 29 gripper pipe, 32 central control unit, 33 machine bus

Claims (2)

A method for evaluating a spliced portion in a work unit (2) of a textile machine for manufacturing a traverse package (5), wherein the work unit (2) knots the yarn ends of two yarns (6). Yarn splicing device (20) for piecing without a portion, Thread clearer (22) for monitoring traveling yarn (6), Thread cutting device for cutting and removing yarn defects and piecing portions located outside the allowable error range (25) and a control device (19, 32),
Using the yarn cutting device (25), the yarn splicing portion detected to be acceptable is cut so that the cut yarn splicing portion can be easily taken out by an operator, and such a yarn is cut. A method for evaluating a spliced portion, wherein the cut portion is displayed. A textile machine for manufacturing a traverse winding package (5) for evaluating a spliced part in a working unit (2) of a textile machine for manufacturing a traverse winding package (5), wherein the working unit (2) includes two Splicing device (20) for splicing the end of the yarn (6) without a knot, a yarn clearer (22) for monitoring the traveling yarn (6), and a yarn defect located outside the allowable error range And a yarn cutting device (25) for cutting and removing the yarn splicing part and a control device (19, 32),
The control device (19, 32) causes the yarn cutting device (25) to cut the yarn cutting device (25) so that the yarn splicing portion located within a preset allowable error can be easily taken out. A textile machine for manufacturing a traversed package, characterized in that it is configured to control and the display means is controlled to signal such a yarn cutting section.

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