WO2024251596A1 - Verfahren zum überprüfen der gültigkeit eines anzeigewertes während eines kämmvorgangs und kämmmaschine - Google Patents
Verfahren zum überprüfen der gültigkeit eines anzeigewertes während eines kämmvorgangs und kämmmaschine Download PDFInfo
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- WO2024251596A1 WO2024251596A1 PCT/EP2024/064825 EP2024064825W WO2024251596A1 WO 2024251596 A1 WO2024251596 A1 WO 2024251596A1 EP 2024064825 W EP2024064825 W EP 2024064825W WO 2024251596 A1 WO2024251596 A1 WO 2024251596A1
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- Prior art keywords
- combing
- band
- evaluation unit
- head
- curve
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
- D01G31/006—On-line measurement and recording of process and product parameters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G19/00—Combing machines
- D01G19/06—Details
- D01G19/22—Arrangements for removing, or disposing of, noil or waste
Definitions
- the present invention relates to a method for checking the validity of a display value during a combing process in which a combing machine produces a combing band from a wadding template, the combing machine having a plurality of combing heads, each of which has a pair of pliers through which a wadding band of the wadding template presented to the combing head can be guided, a circular comb for combing out combing noils from fiber tufts of the wadding band clamped by the pair of pliers, and a consolidation device for forming an individual combing head band from the combed out fiber tufts, a suction device for suctioning the combing noils, a compression device for combining the individual combing head bands to form the combing band, an evaluation unit, a display device coupled to the evaluation unit, and a detection device coupled to the evaluation unit for detecting an actual course of at least one time-varying value attributable to the combing band and/or at least one of the individual combing head bands. detection size.
- the yarn quality is determined, among other things, by the proportion of long fibers in the yarn.
- combing machines are used in the spinning preparation phase, which comb out a certain proportion of short fibers, neps, trash and dust from the feed wadding.
- wadding bands from wadding feeds which can include wadding rolls or band feeds from fiber band cans, are fed to the individual combing heads of the combing machine.
- the wadding bands are combed out by the circular combs of the individual combing heads, the waste that is produced is called combing noil and is sucked away by the combing heads using the suction device.
- the current noil proportion can be determined based on the amount of noil that is sucked out. To do this, in a process step that is usually carried out manually, the noil waste is intercepted within a certain period of time at a central suction device connected to the combing machine or directly at the combing machine using a slide that is inserted into a central suction channel of the suction device. The combing sliver produced by the combing machine during this period of time is also cut off. The combing degree of the combing machine can be determined by subsequently weighing the cut-off combing sliver and the intercepted noil separately.
- K is the weight of the intercepted noil and G is the weight of the cut-off combing sliver and the intercepted noil
- p 100% of the noil proportion.
- the noil proportion represents the percentage of the weight of the feed wadding and the weight of the combing noil.
- WO 93/12278 A1 discloses an arrangement of sensors for automatically detecting the combed noils.
- DE 102006002390 A1 describes the associated setting options of the combing machine depending on the fiber quality.
- each combing head of a combing machine has sensors that measure the weight of the lap in front of the combing head.
- the combed-out comb noils are removed via a suction device under the circular comb.
- the output mass is measured using a measuring funnel or sensor and compared with the input mass.
- An evaluation unit compares the measurement data, whereby the difference should correspond to the mass of the combed-out comb noils.
- the comb noil proportion is shown on a display device.
- the object of the present invention is to provide a cost-effective and easy-to-implement method for displaying the current noil proportion on the combing machine.
- the combing machine has an evaluation unit, a display device coupled to the evaluation unit and a detection device coupled to the evaluation unit for detecting an actual course of at least one time-varying detection variable assignable to the combing band and/or at least one of the individual combing head bands, and in that the method comprises the following steps which are carried out during the combing process of the material feed: displaying the display value on the display device, wherein the display value represents a combing noil proportion which corresponds to a value stored in the evaluation unit.
- reference curve is assigned; comparing the actual curve of the at least one recorded variable with the reference curve by means of the evaluation unit; and if the comparison shows that the actual curve of the at least one recorded variable is at least temporarily outside a predetermined tolerance field of the assigned reference curve, generating a signal that the noil portion is invalid.
- the detection variable the at least one time-varying detection variable that can be assigned to the combing belt and/or at least one of the individual combing head belts
- the detection variable is referred to as “the detection variable”
- Automating the event-controlled noil determination is also possible with the appropriate implementation of automatic noil detection.
- the temporary introduction of a receiving device for picking up and/or collecting the Combing noils in the suction device can be automated, and the collecting means can also be designed sensor-based, for example by means of optical or inductive sensors in the suction tract.
- the tolerance field of the reference course is stored in the evaluation device.
- the size of the tolerance field can be specified by the operator of the combing machine. Only when the reporting signal is generated is the operator made aware of the event that the displayed noil proportion is no longer valid.
- Another advantage is that, by additionally taking laboratory data into account, a connection can be derived between supply, combing sliver and combing noil data and, for example, the combing noil proportion recorded online and the combing noil quality. In this way, permanent noil determination can be achieved with only minimal manual effort, since recalibration is only necessary when triggered by an event, namely when the display value is invalid.
- the actual curve can reflect the curve of the detection variable over time.
- the actual curve of the detection variable can be compared with the reference curve during the combing process continuously or discontinuously or at discrete times, for example at intervals of 1 second, 5 seconds, 1 minute.
- the reference curve can depict a temporal curve of the detection variable that the detection variable follows over time under constant boundary conditions of the combing machine during the combing process.
- an observation window can be specified in the combing process, so that the comparison of the actual curve with the reference curve only starts at the beginning of the observation window and stops at the end of the observation window.
- the observation window can have a starting point, which can be defined, for example, by specifying that a minimum sliver length of just three meters, for example, must be combed, that the delivery speed set for the combing process must be reached, that a minimum time must have elapsed, etc.
- An end point for the observation window can also be defined in a similar way. This means that when the can is changed, for which the delivery speed of the combing machine is reduced, the observation window can close and only open again when the set delivery speed is reached.
- the alarm signal can only be generated if the comparison shows that the actual course of at least one recorded variable lies outside a specified tolerance field of the assigned reference course for longer than a specified period of time.
- the period of time can be, for example, 1 second to 10 minutes. The extent to which the actual course deviates from the reference course can be taken into account. If the evaluation unit recognizes that the actual course and the reference course are deviating more and more from one another, it can be provided that if a predeterminable threshold value, which can lie outside the tolerance field, is exceeded, the alarm signal is generated before the end of the specified period of time.
- the material feed can be a winding feed or a ribbon feed from sliver cans in a conventional manner.
- the procedure for loading the combing machine with winding or ribbon feed is usually specified in a spinning mill in order to take spinning mill-specific conditions into account.
- the material feed on all combing heads can be completely changed and the combing process is only normally completed when the next change is due, when all combing heads are again loaded.
- the combing heads can also be loaded in blocks, so that, for example, in a 12-head combing machine, the first six combing heads are changed at the beginning of the combing process and the second six combing heads are changed halfway through the combing process.
- the combing process is repeated with new material templates until the report signal is generated.
- the evaluation unit can provide information, for example that the combing process, i.e. the production of the combing machine, must be stopped, the noil proportion must be recalculated, the reference curve must be re-recorded, the combing machine must be cleaned, the combing heads must be checked for possible blockages, possible repairs must be carried out, etc.
- a current noil proportion can be determined based on the amount of noil sucked out by the suction device and reassigned to the reference curve stored in the evaluation unit. This can be particularly advantageous if a defective component has been repaired or replaced, or a blockage on a combing head has been cleared, or something similar. This means that the noil proportion stored in the evaluation unit can be replaced by the newly determined noil proportion. In principle, however, it can also be provided that the signal is acknowledged manually in order to declare the display value as valid again. This can be particularly useful after repairing or replacing a defective component, clearing a blockage on the combing head, or something similar, since the combing process can and will then continue with the same boundary conditions.
- the evaluation unit From the time at which the current noil proportion has been reassigned to the reference curve or the reporting signal has been acknowledged, the evaluation unit recognizes the noil proportion shown on the display device as valid again until the comparison of the actual curve of the recorded variable with the reference curve again detects a deviation and the evaluation unit generates the reporting signal.
- the current noil proportion is determined in a conventional manner, either manually or automatically.
- the reference curve is preferably created based on a reference run.
- the current boundary conditions on the combing machine can be taken into account in the reference run. It is advantageous if the reference run comes as close as possible to the combing process or corresponds to it in terms of the boundary conditions that influence the sliver quality of the combing sliver.
- the current combing noil proportion is determined during the reference run. This ensures that the combing noil proportion reproduced in the subsequent combing process indicates the last determined combing noil proportion, i.e. the current combing noil proportion.
- the reference run is preferably carried out on the combing machine on which the combing process is also carried out, in which the combing machine produces a combing sliver from the material template.
- a database with reference curves is stored in the evaluation unit so that the operator can select one of the stored reference curves for the material template presented.
- the combing machine combs out a reference template with a reference wadding band for each combing head during the reference run.
- the reference template does not differ from the material template in a practical way. It is also advantageous if the procedure for changing the reference template during the reference run corresponds to the procedure during the combing process, for example complete or block-wise change.
- the reference curve thus reflects the expected actual curve of the recorded variable in the combing process, provided that the combing noil proportion remains constant during the combing process.
- the comparison shows that the display value is invalid, whereupon the current combing noil proportion can be re-determined.
- the display value is no longer displayed until the new combing noil proportion has been determined in order to avoid the operator assuming an incorrect combing noil proportion.
- the reference run is carried out before the combing process and/or after the signal has been generated and/or when a boundary condition affecting the combing band changes. This ensures that the displayed noil proportion always corresponds to the current noil proportion and in particular only needs to be determined if the display value is declared invalid due to a deviation of the actual course of the recorded variable from the reference course.
- the detection device can comprise a sensor assigned to the combing belt for detecting the at least one detection variable.
- This sensor can be designed, for example, as a distance sensor, displacement sensor or the like.
- the sensor can be arranged on a first roller of a pair of sensing rollers through which the combing belt passes.
- the first roller can in particular be spring-loaded and held so as to be movable relative to a second roller of the pair of rollers.
- the passing combing belt can be further compressed between the pair of sensing rollers.
- the sensor assigned to the combing belt can also be a tactile, inductive, optical sensor.
- the sensor output signal can be proportional to a belt mass of the outgoing combing belt.
- the evaluation unit does not have to be calibrated, since the comparison can be carried out using the directly detected sensor output signal. It is therefore sufficient to monitor the actual course of the sensor output signal and compare it with the reference course.
- an actual curve of a processed value derived from the sensor output signal such as the strip mass, strip thickness, etc., can also be used for comparison with the reference curve.
- the sensor output signal viewed over time follows the reference curve in the combing process, even with each additional material feed, provided the boundary conditions in the combing process remain constant or the combing noil proportion does not change.
- the sensor assigned to the combing strip can therefore supply the sensor output signal, the actual curve of which is monitored during the combing process and/or which is recorded in the reference run in order to create the reference curve from it.
- the actual curve of the respective detection variable can thus be compared with the associated curve of the reference curve.
- the sensors assigned to the individual combing head bands can be arranged on or behind the respective consolidation device of the respective combing head in the direction of belt travel.
- the respective sensor can be arranged on a first roller of a pair of rollers, which is held movably relative to a second roller of the pair of rollers, in particular spring-loaded.
- the respective pair of rollers can, for example, be a pair of calender rollers equipped with the sensor, for example a distance sensor, which can be part of the consolidation device.
- the drafting system can have an input roller that can be driven by a first drive and an output roller that can be driven by a second drive, so that the input roller and the output roller can be driven separately from one another. It is fundamentally possible for the drafting system to have at least one non-driven roller in front of the input roller and/or between the input roller and the output roller and/or behind the output roller in the direction of the belt.
- the detection device can thus detect the peripheral speeds or rotational speeds of the input and output rollers.
- a third embodiment of the detection device which can be provided alternatively or in addition to the first and/or second embodiment of the detection device, this can detect a draft ratio of the drafting system as the at least one detection variable.
- the draft ratio can thus be used to check when the current noil proportion in the combing process deviates from the noil proportion shown on the display unit. If the actual course of the draft ratio in the combing process follows the reference course, the boundary conditions have not changed or the displayed noil proportion continues to correspond to the current noil proportion.
- the ratio of peripheral speeds of roller pairs of the drafting system working one after the other can reflect the draft ratio.
- the sensor output signal of the sensor assigned to the combing sliver can be used as a further detection variable. Its sensor output signals, which can be proportional to the sliver mass of the outgoing combing sliver, will be largely constant over the time of the combing process due to the draft adjustment in the drafting system.
- the reference curve can therefore have two curves, a first for the draft ratio and a second for the sensor output signal of the sensor assigned to the combing sliver.
- the sensor output signal of the sensor assigned to the combed sliver can be fed to the evaluation unit in order to be able to regulate, for example, long-wave periodic fluctuations in the individual head combed slivers presented to the drafting system.
- the drafting system can thus carry out a draft adjustment in order to achieve a uniform sliver mass for the combed sliver.
- the draft adjustment is recorded in the reference run and stored as a draft curve in the evaluation unit, wherein during the combing process the drafting system adjusts the draft according to the draft curve.
- the draft adjustment can be carried out over time by adjusting the ratio of the peripheral speeds of the successively operating roller pairs of the drafting system.
- the detection device can comprise the sensor assigned to the combing band and/or the sensors assigned to the individual combing head bands.
- the detection variable of the respective sensor can be its sensor output signal, which over time, i.e. its actual course, follows the reference course. If a deviation is detected in the comparison, the corresponding report signal is generated.
- the actual course of the sensor output signal assigned to the combing band will correspond to a largely constant value.
- the respective sensor output signals can be recorded in the reference run and the reference course can be created based on this, which can have its own course curve for each of the detection variables if there are several sensors.
- the actual course of the detection variable assigned to the combing band can be used for the comparison.
- the method can therefore be designed to be particularly simple in terms of the detection device or can use sensors that are already installed as standard in a conventional combing machine.
- the advantage is that complex measurement methods such as weighing the incoming mass of the cotton strips, for example by weighing the individual cotton rolls, are not necessary with the method. As long as the actual course of the detection value follows the reference course, the boundary conditions are unchanged or the reproduced noil proportion continues to correspond to the current noil proportion of the combing machine.
- a further solution to the above-mentioned problem consists in a combing machine of the type mentioned at the outset, which is designed to produce a combing band from a material template, wherein the combing machine has a plurality of combing heads, each of which has a pliers device through which a cotton band of the material template presented to the combing head can be guided, a circular comb for combing out comb noils from fiber tufts of the cotton band clamped by the pliers device and a consolidation device for forming an individual combing head band from the combed out fiber tufts; a suction device for suctioning the comb noils; a compression device for combining the individual combing head bands to form the combing band; an evaluation unit; a display device coupled to the evaluation unit; and a detection device coupled to the evaluation unit for detecting an actual course of at least one time-varying detection variable assignable to the combing band and/or at least one of the individual combing head bands.
- the combing machine is configured to carry out the method described above.
- the combing machine according to the invention provides the same advantages as those described in connection with the method according to the invention, so that reference is made here for short to the above description. It goes without saying that all the above-mentioned embodiments of the method can be transferred to the combing machine and vice versa.
- Figure 1 is a representation of a combing machine according to the invention which produces a combing ribbon from cotton ribbons of a winding template
- Figure 2 is a schematic representation of a combing head of the combing machine of Figure 1;
- Figure 4 is a flow chart of a reference run of a method according to a first embodiment of the invention, wherein during the reference run, sensor output signals of a sensor of the combing machine from Figure 1 assigned to the combing band are detected as detection variables;
- Figure 5 shows a reference curve created on the basis of the reference run from Figure 4.
- Figure 6 is a flow chart of a combing process of the method using the combing machine of Figure 1;
- Figure 7 shows a method step carried out during the combing process in which an actual curve of the input variable is compared with the reference curve from Figure 5;
- Figure 8 shows the method step from Figure 7, whereby the comparison shows that the actual course of the detection variable lies outside a predetermined tolerance field of the reference course;
- Figure 9 shows a reference curve created on the basis of a reference run of a method according to a second embodiment of the invention, wherein during the reference run sensor output signals from sensors of the combing machine from Figure 1 assigned to individual combing head bands are recorded as the detection variable;
- Figure 10 shows a method step carried out during the combing process in which an actual curve of the input variables is compared with the reference curve from Figure 9;
- Figure 11 shows a reference curve created on the basis of a reference run of a method according to a third embodiment of the invention, wherein during the reference run, a draft ratio of a drafting system of the combing machine from Figure 1 is recorded as the recording variable;
- Figure 12 shows a method step carried out during the combing process in which an actual curve of the input variable is compared with the reference curve from Figure 11;
- Figure 13 shows a draft adjustment of a drafting system of the combing machine from Figure 1 recorded during a reference run of a method according to a fourth embodiment of the invention
- Figure 14 shows a reference curve created on the basis of the reference run from Figure 13, wherein during the reference run sensor output signals of a sensor assigned to the combing band of the combing machine from Figure 1 are recorded as the recording variable;
- Figure 15 shows a process step carried out during the combing process, in which an actual curve of the input variable is compared with the reference curve from Figure 14, whereby during the combing process the drafting system adjusts the draft according to the draft curve from Figure 13;
- Figure 16 is a representation of another combing machine according to the invention, which produces a combing sliver from cotton slivers of a sliver template made of sliver cans.
- the material template 4 is, here, a winding template, so that each combing head 2 is provided with its own cotton roll 5 with, for example, 80 ktex fibers, which can have a width of, for example, approximately 300 millimeters.
- Each cotton roll 5 has a cotton tape 6 that is wound on a winding tube 7.
- the length of the respective cotton tape 6 is usually between 300 meters and 500 meters, but can in principle be between 80 meters and 1000 meters.
- the respective combing head 2 can comprise two winding rollers 8, 9, of which the front winding roller 8 can be driven.
- the respective lap roll 5 lies on the winding rollers 8, 9.
- the lap band 6 can be deflected on a deflection roller 12 and is transferred to a feed cylinder 13 of a nipper device 14.
- a pressure roller 17 can be arranged which is pivotably mounted and loaded about a lever 15 via a spring 16. This embodiment with the deflection roller 12, the lever 15 loaded with the spring 16 and the pressure roller 17 is preferably only used in an automatic lap application process and does not have to be part of the combing machine 1.
- the pliers device 14 can be moved back and forth via levers 18, 19 and driven via a shaft 20, which can be connected to the gear (not shown).
- a ratchet wheel (not shown) is attached to the feed cylinder 13, which is gradually rotated by a ratchet (not shown) as the pliers device 14 moves back and forth, thereby feeding the cotton strip 6 to the jaws of the pliers device 14 with a feed amount that can be adjusted in particular for combing.
- the cotton strip 6 that is fed in at each combing head 2 is gradually unwound from the cotton roll 5 during operation of the combing machine 1, and fibers are torn out and combed out.
- a circular comb 21 is rotatably mounted beneath the pliers device 14, which combs out the fiber tuft fed in by the closed pliers device 14 via its comb segment 22.
- the circular comb 21 can also be connected to the drive of the gear (not shown).
- a top comb 23 short fibers, neps and impurities are removed from the fiber material, which are sucked as so-called combing noils 24 through a guide shaft 25 of a suction device 26 into a central suction channel 27, which is assigned to all comb heads 2 of the combing machine 1.
- the individual combing head belt 29 can be monitored if necessary.
- a sensor 34 associated with the individual combing head belt 29 can be provided, which can be designed, for example, as a path or distance sensor, although other suitable sensor types are possible in order to be able to monitor, for example, the strip mass or thickness progression.
- the individual combing head band 29 guided through the pair of calender rollers 32, 33 is delivered to a deposit table 35 which is assigned to all combing heads 2 of the combing machine 1.
- the individual combing head bands 29, in particular arranged next to one another are guided to a common drafting system 36.
- the eight individual combing head bands 29, here, run into the drafting system 36, are stretched and doubled, for example by a factor of 18, and combined to form the combing band 3 by means of a compression device 37, which can comprise a band funnel, for example.
- the combing band 3 can then be deposited in a can by means of a can deposit 38 at a delivery speed of, for example, approximately 230 meters per minute. It goes without saying that higher or lower delivery speeds, other factors for the draft, other widths for the batting rolls 5, other fiber finenesses for the batting bands 6, etc. are possible than the values mentioned here merely as examples.
- the input roller pair 39 and the middle roller pair 40 form a pre-drafting field 49.
- a subsequent main drafting field 50 is formed by the middle roller pair 40 and the output roller pair 41.
- the bottom rollers 42, 43, 44 are rotatably mounted on a machine frame 51 of the combing machine 1.
- the drafting system 36 can be an uncontrolled or a controlled drafting system.
- the lower roller 44 of the output roller pair 41 can be driven by a first drive (not shown), the main motor, and determines the delivery speed of the combing machine 1.
- the lower rollers 42, 43 of the input and middle roller pair 39, 40 can be driven by a second drive (not shown), the control motor.
- Other drive concepts are also possible.
- the upper rollers 45, 46, 47, 48 are pressed against the lower rollers 42, 43, 44 by pressure elements 52 and are thus driven by friction.
- an optional pair of sensing rollers 53 with a sensor 54 assigned to the combing belt 3 can be arranged at the output of the drafting system 36.
- one sensing roller can be arranged so that it can pivot and in particular is spring-loaded against the other stationary sensing roller.
- the sensor 54 assigned to the combing belt 3 can be, for example, a distance or displacement sensor, although other suitable sensor types, such as tactile or optical sensors, are also possible.
- the sensor 54 assigned to the combing belt 3 can also be a microwave sensor, ultrasonic sensor or the like, which can be configured to monitor the belt mass profile or the thickness profile of the combing belt 3.
- the combing belt 3 can be monitored by detecting the distance between the two sensing rollers of the pair of rollers 53 or the size of the change in distance.
- various detection variables namely the sensor output signals of the respective sensor 34, 54 and/or the draft ratio of the drafting system 36 or the peripheral speeds of the successively operating roller pairs 39, 40, 41 of the drafting system 36, can be detected.
- the detection device 55 is coupled to an evaluation unit 56 of the combing machine 1.
- the evaluation unit 56 can be coupled to a control of the combing machine 1, be part of the control or itself form the control of the combing machine 1.
- the evaluation unit 56 can be coupled to a display device 57 or a display of the combing machine 1.
- an input field 58 can also be provided on the display device 57, via which the operator of the combing machine 1 can make inputs.
- Figure 4 shows a flow chart of a reference run of a method according to a first embodiment of the invention.
- the reference run is used only to obtain information and is intended to depict the subsequent combing process, during which the combing machine 1 produces the combing band 3 in the usual way from the material template 4 provided or the material templates 4 that are repeatedly provided.
- the basic idea is that information obtained from the reference run should apply to the subsequent combing process(es). This is checked again and again during the combing process. As soon as there is a deviation, the operator of combing machine 1 is informed.
- the reference run starts with Start 60, in which the combing machine 1 produces a combing band 3 with the boundary conditions that also apply to the combing process, such as delivery speed, etc., from a reference winding template that corresponds to the properties of the material template 4.
- the reference winding template has a lap roll 5 with a reference lap band for each combing head 2.
- the detection device 55 detects the time-varying detection variable that can be assigned to the combing belt 3 and corresponds to the sensor output signal of the sensor 54 assigned to the combing belt 3.
- the detection device 55 transmits the continuously or discontinuously detected detection variable to the evaluation unit 56.
- step 62 the amount of noil 24 that accrues within a certain period of time and is sucked away by the suction device 26 is measured.
- the noil for the certain period of time can be collected in the suction channel 27, removed and then weighed in a manner known per se. Automatic noil determination is also possible.
- the combing sliver 3 produced by the combing machine 1 in this period of time is cut off.
- the noil proportion represents the percentage of the weight of the feed wadding and the weight of the noil.
- the noil proportion is set on the combing machine as required and is usually in a range between 5 and 20 percent and generally depends on the desired yarn quality, which is achieved by subsequently spinning out the combing sliver 3.
- the current noil proportion can be calculated by the evaluation unit 56 by manually entering the weighed noil quantity and the weight of the cut combing sliver, i.e. the roving, or the roving length if the specific sliver weight is known or to be entered via the input field 58.
- the input of values as well as the information displayed on the display device 57 can in principle also be carried out via mobile devices such as smartphones, tablets, etc. or remotely. arranged stationary terminals in a central spinning mill can be entered and displayed.
- Steps 62 and 63 can be repeated several times during the reference run in order to increase the measurement accuracy of the noil proportion. Steps 62 and 63 are usually carried out one to three times.
- step 65 the reference curve 64 and the noil proportion determined in step 63 are linked to one another.
- the evaluation unit 56 stores the reference curve 64 together with the determined noil proportion.
- the reference curve 64 shown in Figure 5 is thus linked, for example, to a specific value, merely as an example to a noil proportion of 16 percent, end 66.
- the detection device 55 detects the detection variable in step 72, here the sensor output signal U, in particular the output voltage of the sensor 54 assigned to the combing belt 3.
- the actual curve 74 or the actual value of the continuously or discontinuously detected detection variable, is compared with the stored reference curve 64, as shown in Figure 7. If the actual curve 74 follows the reference curve 64, as shown by way of example at the times ti, t2, or at least remains within a predeterminable tolerance field, the width of which is indicated by the reference symbol 75, the combing noil portion is still valid 76 ("yes"), so that the strand 72, 73 is repeated and the display value, here 16 percent noil content as an example, continues to be displayed on the display device 57.
- the combing machine 1 stops and the next material supply 4 can be presented.
- the combing process is restarted and the evaluation unit 56 starts the comparison of the actual curve 74 with the reference curve 64 again from the beginning, time to. This can be repeated as long as the actual curve
- the display value is shown on the display device 57, which, due to the boundary conditions remaining unchanged, still corresponds to the actual noil proportion that occurs during the combing process, in this case 16 percent as an example. A new determination of the noil proportion is therefore not necessary.
- the detection device 55 can detect their sensor output signals as detection variables and transmit them to the evaluation unit 56.
- Figure 9 shows a curve 80 of the respective sensor 34 over time of an alternatively possible reference run with the time period At, beginning with tsTARi and ending with IEND.
- the combing machine 1 has, here as an example, eight of the combing heads 2, so that the evaluation unit 56 receives the sensor output signals of the eight sensors 34 from the detection device 55 and the reference curve 64 created in step 65 has its own curve for each of the detection variables.
- the actual curve 74 of the respective detection variable in the combing process (start 70) can thus be compared with the associated curve 80 of the reference curve, see Figure 10.
- the evaluation unit 56 if one of the actual curves leaves the associated curve 80 and is also outside the tolerance field 75 over the predefinable time interval, the evaluation unit 56 generates the message signal that the display value is invalid. Here too, as long as the signal is not generated, the combing process can be repeated as many times as required with new material templates 4.
- the reference curve can thus have two curves, a first for the draft ratio and a second for the sensor output signal of the sensor 54 assigned to the combing band. If the sensor output signals of the sensor 54 assigned to the combing band deviate from the associated curve during the combing process and lie outside the tolerance field 75, the report signal is also generated.
- the evaluation unit 56 compares the actual course of the sensor output signal of the sensor 54 assigned to the combing belt 3 with the reference course 64 from Figure 14, as shown in Figure 15, and generates the message signal if the actual course of the sensor output signal of the sensor 54 assigned to the combing belt 3 lies outside the predetermined tolerance field 75 of the reference course 64.
- Figure 16 shows another combing machine 100 with, here as an example, twelve combing heads 2.
- the combing machine 100 differs from the previously described combing machine 1 only in the material feed 4, which here is a sliver feed made of fiber sliver cans 101. Accordingly, the combing heads 2 do not have any elements intended for the lap rolls 5, such as the winding rollers 8, 9.
- the above comments on the mode of operation and the method therefore also apply equally to the combing machine 100.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
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| CN202480035080.6A CN121263561A (zh) | 2023-06-07 | 2024-05-29 | 用于在精梳过程期间检查显示值的有效性的方法和精梳机 |
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| DE102023115086.3 | 2023-06-07 | ||
| DE102023115086 | 2023-06-07 | ||
| DE102023116482.1A DE102023116482A1 (de) | 2023-06-07 | 2023-06-22 | Verfahren zum Überprüfen der Gültigkeit eines Anzeigewertes während eines Kämmvorgangs und Kämmmaschine |
| DE102023116482.1 | 2023-06-22 |
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| WO2024251596A1 true WO2024251596A1 (de) | 2024-12-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993012278A1 (de) | 1991-12-09 | 1993-06-24 | Maschinenfabrik Rieter Ag | Kämmaschine |
| DE102006002390A1 (de) | 2006-01-17 | 2007-07-19 | Maschinenfabrik Rieter Ag | Einstellvorrichtung für eine Textilmaterial verarbeitende Maschine |
| DE102007039067A1 (de) | 2007-08-17 | 2009-02-19 | TRüTZSCHLER GMBH & CO. KG | Vorrichtung an einer Kämmmaschine zur Überwachung des Kämmlingsanteils |
| DE102021100108A1 (de) * | 2021-01-06 | 2022-07-07 | Trützschler GmbH & Co Kommanditgesellschaft | Verfahren zur Ermittlung der Kämmlingsmenge an einer Kämmmaschine und Kämmmaschine |
-
2024
- 2024-05-29 CN CN202480035080.6A patent/CN121263561A/zh active Pending
- 2024-05-29 WO PCT/EP2024/064825 patent/WO2024251596A1/de active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993012278A1 (de) | 1991-12-09 | 1993-06-24 | Maschinenfabrik Rieter Ag | Kämmaschine |
| DE102006002390A1 (de) | 2006-01-17 | 2007-07-19 | Maschinenfabrik Rieter Ag | Einstellvorrichtung für eine Textilmaterial verarbeitende Maschine |
| DE102007039067A1 (de) | 2007-08-17 | 2009-02-19 | TRüTZSCHLER GMBH & CO. KG | Vorrichtung an einer Kämmmaschine zur Überwachung des Kämmlingsanteils |
| DE102021100108A1 (de) * | 2021-01-06 | 2022-07-07 | Trützschler GmbH & Co Kommanditgesellschaft | Verfahren zur Ermittlung der Kämmlingsmenge an einer Kämmmaschine und Kämmmaschine |
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| CN121263561A (zh) | 2026-01-02 |
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