EP0026472B1 - Unit for transporting wound bobbins - Google Patents

Description

The invention relates to a bobbin transport unit for full bobbins, which have been removed from the winding stations for web or thread-like material, in particular from the winding stations of multi-digit textile machines, in particular for man-made fibers, in particular on spinning machines for man-made fibers, which bobbin transport unit devices for receiving the full, each has a winding point produced coil and is designed in particular as an automatic bobbin changer that can be moved along the machine front for the removal, transfer and removal of the full bobbins from one winding point each.

The continuous quality control of running web-like, band-shaped or thread-like goods - hereinafter referred to as "webs" or "threads" - in the form of thickness determination, titer determination, weight determination, determination of moisture application, etc. is technically complex on the one hand, but this quality control also provides measured values which, because of the length of the webs or threads, have only a limited significance for the failure of the entire product.

The quality control of the webs or threads wound into bobbins, on the other hand, is time-consuming as a separate operation and is also too late to be able to carry out a timely quality correction by interfering with the manufacturing or processing process of the webs or threads.

The quality control of the finished bobbins is not only labor intensive, it also intervenes in the production process insofar as the bobbins to be checked have to be removed from their way for further processing or packaging. For this reason, random quality control of the full bobbins has been customary in the industry up to now. The result is that low-quality spools can get into further processing in the sampling intervals.

FR-A-1 460 976 has proposed that coils which move on an endlessly rotating conveyor belt be scanned by stationary, photoelectric devices.

DE-A-21 23 689 shows a gate-shaped bobbin transport device in which the assignment of the bobbins to their production locations is retained for the purpose of quality control and which a stationary quality control device can start up.

The present invention is intended to ensure, through new means of quality control, that until the quality control corrects the manufacturing or machining process, only a small and tolerable amount of rejects is produced. Furthermore, the technical and personal effort of quality control should be reduced so much that a control of each take-up reel is possible.

The solution provides that the full bobbins are transferred to a bobbin transport unit which contains quality control devices, the assignment between the bobbins and the winding positions on which they were produced being retained.

The advantage of this solution is that quality control is switched on in the production process of the coils, which also includes the transport. This benefits from the fact that, according to the proposed solution, a mechanical aid in the form of the coil transport unit is also available for the transport of heavy coils.

For this reason, the proposed solution is particularly useful for quality control of freshly spun and possibly stretched man-made fibers, since such man-made fibers are spooled into very large and heavy bobbins of more than 30 kg in order to achieve long bobbin run times. The bobbin transport unit can be designed to receive the bobbins from one or a predetermined number of winding positions.

The starting point of the quality control proposed according to the invention is above all the measurement of the amount of the material stored on the spool.

For this reason, the coil transport unit preferably contains devices for weighing the coil or coils that have been transferred to the coil transport unit.

Another important measured value is the spool diameter, which - in connection with the spool weight - is used in particular to determine the spool hardness, but also - in particular for spools on which webs such. B. foil webs are wound - can serve to determine the amount of material stored on the spool. The coil transport unit can therefore have, in addition to the weighing device - or as the only measuring device - a probe device for measuring the diameter.

For man-made fibers and especially freshly spun man-made fibers, another important quality feature is the so-called «preparation order». “Preparation” here means liquids which are applied to the threads during spinning to facilitate the spinning process, the drawing process, the winding and possibly also the further processing.

The measurement of the preparation order, which is proposed as preferred according to this invention, can be carried out either quantitatively or only qualitatively in order to ensure that a preparation order has actually been made. For measuring the preparation order, devices are available, for example, which consist of two electrodes, which are at a defined distance from each other with a certain force on the surface of the coil or as needles in the coil are pressed and determine the electrical conductivity of the coil with a suitable ohmmeter. Such a measuring device can also be arranged on the bobbin transport unit either as the only measuring device or together with the two aforementioned or one of the two aforementioned measuring devices.

The quality measurement can also relate to the properties of the bobbin itself, in particular those properties that indicate the run-off properties of wound threads. Here, in particular, the optical, pneumatic or mechanical scanning of the coil circumferential and coil end faces on mirrors (layers one above the other), strippers (thread arches emerging from the end faces), thickening and similar winding errors is possible.

According to this invention, the bobbin transport unit, which carries quality control devices, can be manually fitted with the take-up bobbins in each case one or a predetermined number of take-up points. However, it is also possible to design the bobbin transport unit as an automatic bobbin changer, which automatically and successively takes over the bobbins of one or more winding positions. Such an automatic bobbin changer is advantageously used in particular in multi-digit textile machines. In this case, the automatic bobbin changer can be moved along the machine front of the multi-digit textile machine and can be positioned in front of each winding point for mechanically effected takeover of the full bobbins produced on the winding point. After the take-over of the full bobbins from a take-up point or - if the automatic bobbin changer has a greater transport capacity - from several take-up points, such a bobbin change automatic can be moved along the machine front in order to transport the taken-up bobbins to a creel or for packaging or further processing.

The use of a computer - preferably a microprocessor - allows the evaluation of the quality measurement data to determine further quality indicators.

• Ti = Cewicht/Fadengeschwindigkeit - Dauer der Spulreise

der Titer errechnet. Dabei kann die Dauer der Spulreise jeder Aufwickelstelle als konstant vorgegeben werden, z. B. durch Einsatz einer Schaltuhr. Es ist jedoch auch möglich, jede Aufwickelstelle in Abhängigkeit von einem erreichten Durchmesser abzuschalten und die Spulreisedauer zu messen und dem Rechner einzugeben.The method proposed in accordance with the invention for determining the thread titer when winding thread spools is particularly useful for spinning machines for chemical fibers, since the titer of the chemical fibers is characterized by a large number of individual parameters, such as, for. B. viscosity, take-off speed, squeezing speed, number of filaments - depends. According to the proposed method, the thread speed, the duration of the winding travel of a bobbin and their weight determined by the bobbin transport unit are determined by the computer or microprocessor and from these values by forming the quotient

• Ti = weight / thread speed - duration of the winding travel

the titer calculates. The duration of the winding travel of each winding point can be specified as constant, for. B. by using a timer. However, it is also possible to switch off each take-up point depending on the diameter reached and to measure the winding travel time and enter it into the computer.

To determine the absolute weight of the thread quantity stored on the bobbin, the weights of the bobbin tubes can be given to the computer. This can e.g. B. also happen that a weighing device for the individual winding tubes is arranged on an automatic bobbin changer, which mechanically or automatically feeds the empty tubes to each winding point, the automatic bobbin changing unit then entering the measurement result and the associated winding point into the memory of the computer. If the sleeve weights do not differ significantly from one another, the sleeve weight can also be entered manually into the memory of the microprocessor. The same sleeve weights for a large number of sleeves can be achieved by precise manufacturing and / or sorting.

Furthermore, it is possible to enter the preparation order ascertained in the bobbin transport unit as a correction quantity for the titer determination. Coil hardness can be calculated by correlating diameter and weight.

On the one hand, quality control can result in the creation of quality documentation for each spool. For this reason it is further proposed according to this invention that the quality control devices are connected to a printer for printing out the measurement results. The printed document can be a list, the individual coils being assigned to the printed measurement results by a defined numbering.

However, the printer can also be designed so that the printed measurement results are attached to each spool and in particular to each spool tube. In this case, the printer is mounted on the bobbin transport unit. It can also be provided that the printer prints out labels which are glued to the individual spools or their spool sleeves.

The assignment of the determined quality values to each spool ensures that each spool has documented quality features. In this way, it can be avoided in further processing that bobbins of insufficient quality are presented. This increases the value in use and the sales value of the manufactured coils, the quality of which was previously only possible by ensuring and guaranteeing statistically determined minimum and maximum deviations from specified quality parameters.

The purpose of quality control is, on the other hand, in the manufacturing or in time To be able to intervene in the processing process of the webs or threads in order to keep the production of rejects within bounds in the event of an impermissible deviation from the specified quality parameters (process control).

For this purpose, it is provided that the bobbin transport unit and the quality measuring devices mounted thereon are connected to a data processing system with memory and computer for quality evaluation. The data processing system takes over in particular the measured values of the quality control, but also other important parameters in its memory and processes them in the course of the quality evaluation to important quality indicators, such as B. titer, coil hardness u. a. The use of a computer with memory also allows the evaluation of the measured values and the determined quality parameters. In this case, in particular, mean values can be formed, which are then used as target values for the operation of the individual winding stations.

The data processing system also serves for process control of the textile machine. As process control comes the direct control of the winding stations - e.g. B. by switch-off signal, setting of the spinning pumps or preparation pump speeds - but also the issue of optical or acoustic warning signals for the operating personnel and the display or printout of measured and characteristic values or sources of error into consideration. For this purpose, the data processing machine in turn is connected to the individual winding stations of the textile machine for taking over measurement data and determined characteristic values and / or for issuing switching commands depending on the measured values of the bobbin transport unit and the quality indicators determined in the data processing system. The term “data processing system is understood here in the broadest sense and includes one or more memories and computers. In particular, these can be microprocessors, which are assigned to the bobbin transport unit and each textile machine in a hierarchical structure and can also be connected to one another by a central unit. For example, it is possible to switch off the individual take-up point or to correct individual machine parameters (e.g. pump speed) if a measured value or a calculated characteristic value from a specified target value or from the calculated mean value of the measured value or characteristic values is permitted by more than one Tolerance value differs. An advantageous application of the invention is that each take-up point is also process-controlled as a function of the measurement and characteristic values determined for the other take-up points.

In this respect, it is possible to operate the quality measuring devices without exact calibration when using a computer and only to monitor the temporal constancy and accuracy of the operating conditions and the constancy and accuracy of the operating conditions from winding station to winding station.

According to the invention, the determined titer value can also be used to intervene in the spinning process in that the computer issues a warning or switch-off signal for the individual in the event of an impermissible deviation of the titer calculated for the individual spool from a previously determined mean value or a predetermined titer setpoint value or from the titer value of the other winding positions Rewind point generated.

The invention - and in particular the invention in so far as it relates to an automatic bobbin changer - permits seamless quality control of the bobbins and winding stations with little technical and time expenditure, since the facilities for quality control only have to be present once for a large number of bobbin stations, and because the quality control during transportation, d. H. the travel of the bobbin transport unit or the bobbin changing machine can take place.

The invention is described below using exemplary embodiments.

• Figur 1 die schematische Draufsicht auf eine Spinnmaschine für Chemiefasern mit Spulenwechseleinrichtungen ;
• Figuren 2a bis 2d einen Spulenabnahmewagen (Spulentransporteinheit, STE) in mehreren Phasen a, b, c, d seiner Operation ;
• Figur3 einen Spulenabnahmewagen mit Wägeeinrichtung sowie
• Figuren 4 und 5 Einrichtungen zur Ermittlung der auf die Fäden aufgetragenen Präparationsmenge sowie
• Figur6 Einrichtungen zur Spulendurchmessermessung.
• Fig.1 veranschaulicht schematisch die gegenseitige Zuordnung einer Spinnmaschine 30 für Chemiefasern mit den einzelnen Aufwickelstellen 60 der der Spinnmaschine zugeordneten Datenverarbeitungsanlage (Mikroprozessors 22) des Fadenbedienungswagens 26, des Spulenabnahmewagens 31 und des Spulentransportgatters 32. Der Begriff « Spulenabnahmewagen » kennzeichnet dabei dessen Funktion als Spulenwechselautomat im Rahmen des Spulenwechsels. Er dient dabei auch dem Spulentransport und wird daher auch als Spulentransporteinheit im Sinne dieser Anmeldung bezeichnet.

Show it :

• Figure 1 is a schematic plan view of a spinning machine for man-made fibers with bobbin changing devices;
• FIGS. 2a to 2d a bobbin removal carriage (bobbin transport unit, STE) in several phases a, b, c, d of its operation;
• Figure3 a bobbin take-off carriage with weighing device and
• Figures 4 and 5 devices for determining the amount of preparation applied to the threads and
• Figure 6 Devices for coil diameter measurement.
• 1 schematically illustrates the mutual association of a spinning machine 30 for man-made fibers with the individual winding stations 60 of the data processing system (microprocessor 22) of the thread operating carriage 26, the bobbin take-off carriage 31 and the bobbin transport gate 32 assigned to the spinning machine. The term “bobbin removal carriage” characterizes its function as an automatic bobbin changer as part of the bobbin change. It also serves for coil transport and is therefore also referred to as a coil transport unit in the sense of this application.

It can be seen that the thread control carriage 26 and the bobbin take-off carriage 31 can be operated independently of one another and are connected to the microprocessor 22 by trailing lines 27 and 28, respectively. The microprocessor 22, on the other hand, is connected by lines 29 to the individual winding heads 60, so that the microprocessor takes over the central control of winding heads, thread operating carriages and bobbin take-off carriages. Thread control carriage and bobbin take-off carriage can be moved on rails 21 along the front of the machine. Each of them has a subordinate microprocessor 54 or 55.

The gate 32 can be positioned anywhere on the rail run 21. Because the thread operating function of the bobbin change is assigned to the thread operating carriage 26, the bobbin take-off carriage is available for the bobbin transport between the individual bobbins 60 and the gate 32.

The interaction of textile machine 30 with bobbins 60 on the one hand and thread control carriage 26 and bobbin take-off carriage 31 on the other hand for the purpose of changing the bobbin is described in German patent application P 29 39 675.6 (a priority document). Reference is made to this for the details. In the following, the bobbin removal carriage is first described with reference to FIGS. 2a and 2d.

As already mentioned, the bobbin removal carriage 31 can be moved on the rails 21. It has a support column 34 on a base plate, on which the support carriage 35 can be moved. A boom 36 sits on the carriage 35, on which a cat 37 can be moved. The cat 37 has a pivot axis 38 parallel to the column 34, on which the sliding block 44 is seated. In the sliding block 44, the U-shaped support arm 39 with the holding mandrel 40 is movable in the plane of the “U”. The corresponding drive devices are not shown in detail here. However, it can be seen from the illustration that the holding mandrel 40 can be moved in height, can be moved in the direction of the arm 36 and in the plane of the pushing mandrel 40 and can also perform a pivoting movement. The gate 32 with a plurality of arbors 33 is also visible in FIG. Furthermore, the coils 43 and full bobbins 41 of two winding heads 60 with push-out devices 42 which are still on the winding travel and are seated on chucks 19 are shown in FIG. 2a. The full bobbins 41 shown in dashed lines are no longer on the bobbin trip and are waiting to be changed. As a full bobbin in the sense of this application, each bobbin is defined, wound onto the thread material and the winding travel is finished, regardless of whether the intended amount of thread is wound or whether the winding travel is premature - z. B. because of thread breakage or other disturbances - has been interrupted.

On the holding mandrel 40 of the bobbin removal carriage, there is a push-out device 45 which slides on the holding mandrel 40 and engages behind the pushed-on empty sleeves 13 of the full bobbins 41.

3 shows a detail of such a bobbin removal carriage 31. The bobbin removal carriage has a weighing device for the full bobbins 41. For this purpose, it is provided that the spring-loaded weighing plates 46, 47 with scanning devices 50, 51 and connecting lines 52, 53 to the microprocessor are accommodated on the base plate of the bobbin removal carriage. Aligned forks 48, 49 are located on the weighing plates 46, 47, and their spacing is set such that they each grip the sleeve ends of one of the coils 41.

By lowering 134 (FIG. 2b) of the holding mandrel 40, the full coils 41 located on the holding mandrel are stored and weighed in the fork pairs 48, 49. The weighing results go to the microprocessor. It is possible and provided according to the invention to also determine the tube weights beforehand and to determine the exact thread weight Y in the microprocessor. The weighing plates 46, 47 and the fork pairs 48, 49 are arranged so that the lowering movement 134 can take place following the pivoting movement 125 (FIG. 2b). Weighing can easily take place while the bobbin take-off carriage is traveling between the take-up point and the gate - d. H. without wasting time - take place.

FIGS. 4 and 5 also show a device for measuring the liquid or preparation order as a detail of the bobbin removal carriage. The yoke-shaped measuring head 76 has the two electrodes 77 and 78, which adapt to the coil circumference normally produced on the winding machine. Elastic formation of the electrodes results in a snug fit on the coil surface. The measuring head 76 is attached to the sliding block 44 by a Zalinder piston unit 79, 80, with the interposition of a spring 81. Compressed air can be applied to the piston 80 via the line 82 and the measuring head 76 can thereby be lowered against the force of the spring 81. The internal microprocessor 54 assigned to the bobbin take-off carriage is now programmed so that it first detects the weighing result of the bobbin 41 before it is loaded with the pressure of the measuring head 76. This measurement result is stored in the memory of the external microprocessor 22 assigned to the textile machine. A pressure is now applied to the cylinder 79, the measuring head 76 is lowered in the movement 135 and a new weighing signal (weight + pressure = W + A) is generated by the weighing device 46 and passed on to the internal microprocessor 54. The internal microprocessor 54 simultaneously receives the value of the coil weight stored in the external microprocessor and forms the difference signal. Furthermore, the setpoint for the pressure is stored in the external microprocessor 22. This value is also given to the internal microprocessor 54 and, depending on this, the pressure is controlled via the pneumatic converter 83 to a predetermined setpoint value, so that comparable measured values are obtained from coil to coil and calibration of the measuring head is possible.

FIG. 6 shows a device for scanning the diameter, consisting of the sensor 84, which is moved pneumatically against the spring 87 against the spring 87 in movement 137 by means of the cylinder-piston unit 85, 86. The measuring device with the potentiometer 88 and the converter 89 is calibrated so that a signal representing the diameter or the radius is given via the line 90 to the microprocessor. A pressure relief valve 91 with ball and counter pressure spring ensures that a constant pressure is always exerted on the coil surface. It can be seen that the coil hardness can also be determined with this device by means of two-stage pressurization.

The functional sequence for a bobbin take-off carriage is described below.

As can be seen from FIG. 2a, the holding mandrel 40 is first positioned in alignment with the chuck - shown here by the fully wound coils (full coils 41). Now the U-shaped carrier 39 is moved in the sliding block 44 until the holding mandrel 40 comes almost into contact with the end face of the chuck (movement 107). The push-out device 42 is then started with movement 108 - as can be seen in FIG. 2a. Since the push-out device engages behind the sleeves of the full bobbin 41, the two full bobbins are pushed onto the bobbin holding mandrel 40 of the bobbin removal carriage. Now the U-shaped support arm 39 moves back into its starting position with movement 109 (FIG. 2a). By movement 125, the U-shaped support arm 39 is pivoted about the pivot axis 38 by 180 °. Then the cat 37 is moved by movement 126 towards the stand 34. The quality control is now carried out, which is initiated by lowering 134. As a result of this lowering movement, the sleeves of the full spool 41 - as shown in FIG. 3 - are placed on the forks 48, 49 of the weighing device in such a way that the smaller diameter mandrel 40 no longer touches the larger inner diameter of the sleeves of the spools 41. Here, the total weight of thread material plus tubes is first determined and fed to the external microprocessor 22. Subsequently, the measuring heads 76 are moved against the coils by a lowering movement 135 (FIG. 5) and thereby - in the manner described above - a defined pressure is generated between the electrodes of the measuring head and the coils for the purpose of measuring the amount of Aviva applied.

Likewise, the diameter or radius of the coil can now be scanned by the scanning movement 137 of the diameter sensor 84 and put into the memory of the central microprocessor 22.

Following these quality control measurements, which can be carried out alternatively or cumulatively, the boom 36 is raised by the movement 127 (FIG. 2b) until the holding mandrel 40 is aligned with the mandrel 33 of the gate.

If necessary, the U-shaped support arm 39 can still be moved in the sliding block in the direction of the mandrel. The push-out device 45, which is designed as an axially movable sleeve that is placed over the holding mandrel, is then actuated in the axial direction and the first coil is thereby transferred to the mandrel 33 by a movement 128 (FIG. 2). The boom 36 and the carriage 35 are now lowered by the movement 129 to the height of the next mandrel and then, by advancing the push-out device 45 by the movement 130, the second coil is also transferred to a separate mandrel of the gate.

Now the carriage 131 moves back to the height of the winding heads by the movement 131. The cat 37 moves back into a position aligned with a winding device (movement 132). The support arm is then pivoted about the pivot axis 38 (movement 133). The movement sequence according to FIG. 2a can then begin again with the feed movement 107 of the support arm 39.

By appropriate programming of the microprocessor and by the separation of thread operation and bobbin take-off, it is possible to place the bobbins on the gate in such a way that there is an unambiguous assignment between the bobbin head on which the bobbin was produced and the storage space (arbor 33) Gate 32 is possible. This makes quality control and quality assurance much easier.

It must be emphasized that the quality control according to the invention during the bobbin transport is suitable on the one hand to assign qualitative and quantitative properties to the product produced, namely the individual thread bobbins produced. This increases the sales value of the products produced. For this reason, printers are preferably also provided according to the invention in order to mark the spools. These printers can print lists in which each spool is identified with its quality values. It is also possible to print labels which are then stuck onto the spools.

The printing can also be done on the winding tubes. In the latter two cases, the printer is advantageously mounted on the bobbin transport unit. Such an embodiment is shown in FIGS. 4, 5 and 6. The printer there is designated 92 and assigned to the receiving forks of the weighing device, so that it prints the sleeves of the spools. The printer has several printing segments, each of which is connected via lines to the memory of the microprocessor 22 and z. B. coded signals for the thread weight Y, the thread titer Ti and the preparation order L% and a labeling of the winding unit can take over.

However, it is also possible to use the measurement values obtained for monitoring, that is, for process control of the machine. For this reason, quality control in the sense of this application also means process control. This is used to correlate the current measurement or calculation values with setpoints previously entered into the computer or with temporal averages determined by the computer or averages determined by the computer for all winding units. In addition, for the purpose of indirect process control, it is possible to provide the statistical quality expression for an entire textile machine and thereby statements about faultiness and The likelihood of errors and the causes of errors in individual winding stations are too long. This applies in particular to the titer calculation, the weight measurement, the diameter measurement, the measurement of the amount of preparation which is applied to the threads, and the hardness calculation. All of these values, measured directly or determined by calculation, can be used by appropriate programming of the microprocessor in order to issue warning signals or machine operating commands. If e.g. B. is determined by the calculation of the titer that threads are generated too high or too low titers - what z. B. can happen that individual filaments of the multifilament chemical thread get the wrong winding - the winding process for the next bobbin can be stopped immediately and a warning signal given so that the error is remedied. The coil hardness and diameter can be determined by corresponding correlation of the coil weight and an operating signal can also be triggered thereby if the ratio of the coil weight to the diameter does not correspond to the value determined as optimal or the value determined by the microprocessor as the average.

The procedure for assigning qualitative and quantitative quality values to the individual bobbins and winding units is described in more detail using the following flow chart.

The weight of the sleeves w is entered into the memory of the external microprocessor as signal 1. The sleeves for the coils are e.g. B. wound from paper or cardboard. Their weight is essentially constant, so that a single weighing is generally not necessary. However, it is also possible to equip the thread control trolley, which takes over the insertion of the empty tubes according to the German application P 29 39 675.6 (a priority document), with a weighing device for the empty tubes and the current tube weight, based on the respective winding unit, in the memory of the external microprocessor to store.

As signal 2, the start of the winding travel is given as time t ₁ in the memory of the microprocessor by each winding unit - in the example shown by the winding unit designated by X.

Signal 3 contains the thread speed, which is constant during the manufacture of man-made fibers via the winding cycle and can therefore also be entered manually as a constant value.

• T_i (dtex) = Y (Gramm)/v(m/min) . T(min) - 10000.

As signal 4, the winding unit X reports to the microprocessor that the winding change is necessary. To trigger this signal, each winding unit contains a transit time measuring device, on which a previously determined transit time is set. However, it is also possible to use the signal 4 z. B. triggered by diameter scanning. The microprocessor 22 now follows as signal 5 the command to the bobbin transport unit 31 and the thread operating carriage 26 to move to the winding station X and after completion of the report by reaching position X (signals 6 and 7) the signal 8 on the thread operating carriage “take off thread or thread (Which is simultaneously entered as time signal t ₂ for the operation of the winding travel in the memory) and signal 9 "cut threads and signal 10" suck threads ". Now, the push-out device 42 of the winding unit is actuated by signal 11 and the full bobbin is pushed onto the bobbin transport unit. This in turn triggers the signal 12, which includes that the winding unit X is free to insert an empty tube and that the full bobbin has been transferred to the bobbin transport unit. This signal 12, on the one hand, signals 13 and 14 for inserting the empty tube and threading the thread forming carriage. At the same time, the time t ₃ for the start of a new winding trip is given in the memory of the microprocessor. Signal 12 also triggers signal 15 "quality measurement to the bobbin transport unit. As described above, in particular the total coil weight W and the preparation order L and the coil diameter D can be measured. After the quality measurements have been carried out, signal 16 “quality calculations” is sent to the computer of the external microprocessor 22. In particular, the duration of the winding travel T is calculated as the difference between the times t ₂ minus t ₁ and the yarn weight Y as the difference between the bobbin weight and the bobbin weight is corrected by one Factor that represents the preparation order. The titer can also be calculated using the formula

• T _i (dtex) = Y (grams) / v (m / min). T (min) - 10,000.

The results of the quality measurement and the quality calculation can now be passed directly to the winding unit X in the form of a warning or stop signal 17 if these values deviate from the specified target values or from average values which the microprocessor has previously determined in an impermissible manner.

The quality measurement and quality calculation can take place during the time in which the coil transport unit - triggered by signal 12 - has already received the signal 18 for moving to the gate position X. At the same time, a signal 19 for printing on the coils is also triggered by quality measurement and quality calculation. In particular, the winding unit X on which the bobbin is made, the yarn weight Y, the titer T, and the preparation order L% can be recorded.

Signal 20 gives the command to transfer the coil identified in this way to a defined gate position X. It is possible here to assign each coil to a specific winding position.

List of reference symbols

• 13 empty tubes
• 21 rails
• 22 microprocessor (data processing system, computer)
• 26 thread control trolleys FBW
• 27 trailing lines 28
• 29 lines
• 30 textile machine
• 31 bobbin take-off carriage (bobbin transport unit, automatic bobbin changer)
• 32 gates (coil transport gates)
• 33 arbor
• 34 support column
• 35 carrier sledge (sledge)
• 36 support arm, extension arm
• 37 trolley
• 38 swivel arm
• 39 U-shaped support arm
• 40 arbor
• 41 full coils
• 42 ejecting device of the winding device
• 43 bobbins still in the winding cycle
• 44 sliding block
• 45 Push-out device for bobbin take-up carriages
• 
  Scales, weighing plates
• 48 forks 49)
• 
  Sensors, scanners
• 52 lines 53
• 54 microprocessor for STE
• 55 microprocessor for FBW
• 60 winding head (winding stations)
• 76 measuring head
• 77 electrodes
• 78 electrodes
• 79 cylinder cylinder-piston unit 80 pistons
• 81 spring
• 82 line
• 83 Pneumatic converter
• 84 diameter sensors
• 85 cylinder cylinder-piston unit 86 pistons
• 87 spring
• 88 potentiometers
• 89 converters
• 90 line
• 91 pressure relief valve
• 92 printers
• 107 Retraction of mandrel 40 in alignment with the chuck
• 108 Actuation of the slide-on device 42 for transferring the full spools 41 to the mandrel 40
• 109 Retraction of the mandrel 40
• 125 Swiveling the arbor 40 around the swivel axis 38
• 126 positioning in front of the gate 32 (movement of the trolley 37 to the stand 34)
• 127 Approach the specified height
• 128 Transferring a full spool to a mandrel
• 129 Approaching the next mandrel
• 130 Push the next full spool onto the next mandrel
• 131 Lower the carriage 35 to the height of the chuck
• 132 Starting the next full bobbins to be removed 43
• 133 Swiveling into alignment with the chuck axis for the full spools 43 and start with the step
• 134 lowering movement
• 135 Lowering the measuring head 76
• 136 Lifting off the measuring head
• 137 scanning movement

Claims (9)

1. A unit (31) for transporting wound bobbins (41) which have been removed from the winding stations (60) for web-shaped or filamentary material, removed particularly from the winding stations (60) of multi-position textile machines (30) particularly for man-made fibres, particularly in spinning machines (30) for man-made fibres, which transporting unit (31) includes devices (40) for receiving the wound bobbins (41) which have been produced at one winding station (60) each, and in particular is designed as an automatic bobbin doffing device which is movable along the machine front for receiving and transporting the wound bobbins (41) from each winding station (60), characterized by the fact that devices (46, 76, 84) for quality control of the produced wound bobbins (41) and/or of the produced webs or filaments, particularly a weighing device (46) for the wound bobbins (41), and/or a measuring device (76) to determine the quantity of the preparation applied to the yarns, and/or a measuring device (84) to determine the diameter of the wound bobbins (41) are mounted on said transporting unit (31) and are movable therewith along the machine front.

2. A transporting unit according to claim 1, characterized by the fact that the devices (46, 76, 84) for quality control of the produced bobbins (41) and/or of the produced webs or filaments are connected to a printing device (92), preferably to a printing and labelling device (92) mounted on said transporting unit (31) for printing the measuring results and other production data.

3. A transporting unit according to claim 1 or 2, characterized by the fact that the transporting unit (31) is connected to a microprocessor (22) associated with the textile machine (30) and including a memory for quality evaluation, which microprocessor (22) on its part is connected to the individual winding stations (60) of the textile machine (30) for receiving measuring data and or for producing switching commands dependent on the measuring data of the measuring devices (46, 76, 84) mounted on said transporting unit.

4. A method for quality control of bobbins (41), particularly of yarn bobbins which after completion of the winding cycle have been removed from the winding stations (60) of a multi-position textile machine (30), particularly of a spinning machine for man-made filaments, and transferred to a unit (31) for transporting wound bobbins, characterized by the fact that quality control is accomplished during the travel of the transporting unit (31) by means of devices (64, 76, 84) for quality control, which devices are part of said transporting unit.

5. A method according to claim 4, characterized by the fact that weighing and determination of the diameter of the wound bobbin (41) are effected on said transporting unit (31) and that the measured values resulting from the weighing and the determination of the diameter are processed into a quality characteristic of bobbin hardness.

6. A method for quality control of the quality of bobbins (41) of freshly spun man-made fibres which have been wound on tubes into bobbins (41) at a predetermined, constant yarn speed during a winding cycle of a defined duration, by determining the denier (Ti) of the yarn, characterized by the fact that each bobbin (41) which has been transferred from a winding station (60) of the spinning machine (30) to a transporting unit (31) which is movable along the spinning machine (30), is weighed on the transporting unit (31) and that the measured value of the bobbin weight (W) - together with the yarn speed (v), the duration (T) of the winding cycle and the weight (w) of the empty tube - are fed into a microprocessor (22) which calculates the denier (Ti) of the yarn.

7. A method according to claim 6, characterized by the fact that while weighing the bobbin (41) on the transporting unit (31), the amount (L) of the liquid preparation which is calculated and stored by the microprocessors (22, 54) and processed particularly as correction value for determining the denier (Ti) of the yarn, is simultaneously determined.

8. A method according to claim 6, characterized by the fact that the duration (T) of the winding cycle of each winding station (60) is pre-given as constant or that the duration (T) of each winding cycle is measured and the measured value is fed into and stored by the microprocessor (22) for processing.

9. A method according to any of the claims 4 to 8, characterized by the fact that a process control signal is being generated for a winding station (60), when one of the measured or calculated quality characteristics of this winding station (60) differs by more than the permissible tolerance range from a pre-given control value and/or from an average time value statisticaly determined by the microprocessor (22) and/or from the calculated average of the other winding stations (60).

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