EP3587636A1 - Verfahren zur erfassung periodischer unebenheiten, textilverarbeitungssystem, spinnmaschine und programm zur erkennung periodischer unebenheiten - Google Patents

Verfahren zur erfassung periodischer unebenheiten, textilverarbeitungssystem, spinnmaschine und programm zur erkennung periodischer unebenheiten Download PDF

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Publication number
EP3587636A1
EP3587636A1 EP19181965.5A EP19181965A EP3587636A1 EP 3587636 A1 EP3587636 A1 EP 3587636A1 EP 19181965 A EP19181965 A EP 19181965A EP 3587636 A1 EP3587636 A1 EP 3587636A1
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EP
European Patent Office
Prior art keywords
periodic unevenness
fiber bundle
information
unevenness
periodic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19181965.5A
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English (en)
French (fr)
Inventor
Naritoshi Ota
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Murata Machinery Ltd
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Murata Machinery Ltd
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Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Publication of EP3587636A1 publication Critical patent/EP3587636A1/de
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/32—Counting, measuring, recording or registering devices

Definitions

  • One aspect of the present disclosure relates to a periodic unevenness detecting method, a textile processing system, a spinning machine, and a periodic unevenness detecting program.
  • a spinning machine including a drafting device configured to draft a fiber bundle, a spinning device configured to twist the drafted fiber bundle to produce yarn, and a winding apparatus configured to wind the yarn to form a package
  • a spinning machine including a drafting device configured to draft a fiber bundle, a spinning device configured to twist the drafted fiber bundle to produce yarn, and a winding apparatus configured to wind the yarn to form a package
  • a fiber bundle processed by an upstream process machine such as a drawing machine, for example is supplied to such a spinning machine.
  • thickness unevenness of a short wavelength (a high frequency) that is not detectable by a measuring instrument may be included. Such unevenness may appear as periodic unevenness, after drafting in the downstream process machine. In order to improve the quality of the fiber bundle produced in the downstream process machine, it is preferable that the occurrence of such periodic unevenness be reduced.
  • An object of one aspect of the present disclosure is to provide a periodic unevenness detecting method, a textile processing system, a spinning machine, and a periodic unevenness detecting program capable of improving the quality of a fiber bundle.
  • a periodic unevenness detecting method is a periodic unevenness detecting method executed in a textile processing system in which a first fiber bundle that is produced by an upstream process machine is at least drafted by a downstream process machine to produce a second fiber bundle, and the periodic unevenness detecting method includes a first acquisition step of acquiring first information concerning the upstream process machine, a thickness unevenness detecting step of detecting thickness unevenness information concerning periodic unevenness of thickness in the second fiber bundle, and a periodic unevenness identifying step of identifying, based on the first information, the thickness unevenness information, and a total drafting ratio in the downstream process machine, periodic unevenness occurring in the second fiber bundle due to the upstream process machine .
  • the occurrence of the relevant periodic unevenness can be avoided by changing an operating condition of the upstream process machine or by eliminating the defect that has occurred in the upstream process machine, for example.
  • this periodic unevenness detecting method the quality of the fiber bundle can be improved.
  • the periodic unevenness may be identified by using, as the thickness unevenness information, a frequency distribution of or a wavelength distribution of the periodic unevenness of thickness in the second fiber bundle.
  • the periodic unevenness due to the upstream process machine can be identified more suitably.
  • a reference distribution may be a distribution calculated based on fineness, an average thickness, and a rate of fiber lengths of the first fiber bundle, and the total draft ratio, in the periodic unevenness identifying step, the periodic unevenness may be identified based on a comparison result of the reference distribution with the frequency distribution, or based on a comparison result of the reference distribution with the wavelength distribution. In this case, by referring to the reference distribution also, the periodic unevenness due to the upstream process machine can be identified further accurately.
  • the periodic unevenness may be identified by determining whether a peak corresponding to the periodic unevenness has appeared in the frequency distribution or the wavelength distribution. In this case, the periodic unevenness due to the upstream process machine can be identified more accurately.
  • the periodic unevenness detecting method may further include a first output step of outputting the frequency distribution or the wavelength distribution to a display screen, and in the first output step, a peak that appears in the frequency distribution or the wavelength distribution may be displayed in a display form different from a display form of portions other than the peak in the frequency distribution or the wavelength distribution. In this case, an operator who visually confirmed the display screen can find with ease the peak that appears in the frequency distribution or the wavelength distribution.
  • a cause of the periodic unevenness may be predicted based on the first information and the thickness unevenness information. In this case, the cause of the periodic unevenness that is due to the upstream process machine can be learnt.
  • the periodic unevenness detecting method may further include a second acquisition step of acquiring second information concerning the downstream process machine, and in the periodic unevenness identifying step, the periodic unevenness may be identified based on the second information further.
  • the periodic unevenness due to the upstream process machine and the periodic unevenness due to the downstream process machine can be distinguished, the periodic unevenness due to the upstream process machine can be identified further accurately.
  • the upstream process machine may produce the first fiber bundle by drafting a fiber bundle, and the downstream process machine may draft the first fiber bundle at a drafting ratio higher than the drafting ratio in the upstream process machine.
  • the periodic unevenness due to the upstream process machine easily appears, the periodic unevenness due to the upstream process machine can be identified further suitably.
  • the downstream process machine may include a drafting device configured to draft the first fiber bundle, a spinning device configured to twist the first fiber bundle drafted by the drafting device and to produce yarn as the second fiber bundle, and a winding apparatus configured to wind the yarn and to form a package.
  • a drafting device configured to draft the first fiber bundle
  • a spinning device configured to twist the first fiber bundle drafted by the drafting device and to produce yarn as the second fiber bundle
  • a winding apparatus configured to wind the yarn and to form a package.
  • the upstream process machine may include a plurality of roller pairs each having a drive roller and a driven roller, and may produce the first fiber bundle by drafting, by the first roller pairs, a fiber bundle that is supplied to the upstream process machine, and the first information may include at least one of a diameter of the drive roller, the number of teeth of a pulley of the drive roller, a pitch of grooves formed on the drive roller, the number of teeth of a drive gear of the drive roller, a contact pressure between the drive roller and the driven roller, and a diameter of a can in which a fiber bundle produced by the upstream process machine is accommodated.
  • the periodic unevenness due to the upstream process machine can be identified further suitably.
  • the periodic unevenness detecting method may further include a second output step of outputting information for eliminating the periodic unevenness, when the periodic unevenness is identified at the periodic unevenness identifying step.
  • a second output step of outputting information for eliminating the periodic unevenness when the periodic unevenness is identified at the periodic unevenness identifying step.
  • the first information may be acquired by at least one of operating input and communication.
  • the first information may be acquired by reading, by a reading device, information on an information tag provided to a can in which the first fiber bundle is accommodated.
  • a spinning machine is a spinning machine configured to execute the above-describedperiodic unevenness detecting method as the downstream process machine, and includes a drafting device configured to draft the first fiber bundle, a spinning device configured to twist the drafted first fiber bundle and to produce yarn as the second fiber bundle, a winding apparatus configured to wind the yarn and to form a package, a first acquisition device configured to acquire the first information, a thickness unevenness detector configured to detect the thickness unevenness information, and a periodic unevenness identifying device configured to identify, based on the first information, the thickness unevenness information, and the total drafting ratio, periodic unevenness occurring in the yarn due to the upstream process machine.
  • this spinning machine due to the above-described reasons, the quality of the fiber bundle can be improved.
  • the spinning machine may include a plurality of spinning units, each of the spinning units may include the drafting device, the spinning device, and the winding apparatus, and the periodic unevenness identifying device may identify the periodic unevenness on each of the spinning units.
  • the quality of the fiber bundle in each of the spinning units can be improved.
  • the spinning machine may further include a drawing device configured to draw out the yarn from the spinning device
  • the drafting device may include at least a back roller, a middle roller, and a front roller
  • the periodic unevenness identifying device may use, as the total drafting ratio, a difference in circumferential speed between the back roller and the drawing device, or a difference in circumferential speed between the back roller and the front roller.
  • a textile processing system includes a upstream process machine configured to produce a first fiber bundle, a downstream process machine configured to produce a second fiber bundle by at least drafting the first fiber bundle, a first acquisition device configured to acquire first information concerning the upstream process machine, a thickness unevenness detector configured to detect thickness unevenness information concerning periodic unevenness of thickness in the second fiber bundle, and a periodic unevenness identifying device configured to identify, based on the first information, the thickness unevenness information, and a total drafting ratio in the downstream process machine, periodic unevenness occurring in the second fiber bundle due to the upstream process machine.
  • this textile processing system due to the above-described reasons, the quality of the fiber bundle can be improved.
  • a periodic unevenness detecting program that causes a computer, in a textile processing system configured to produce a first fiber bundle by an upstream process machine and to produce a second fiber bundle by at least drafting the first fiber bundle by a downstream process machine, to perform processing of acquiring first information concerning the upstream process machine, processing of detecting thickness unevenness information concerning periodic unevenness of thickness in the second fiber bundle, and processing of identifying, based on the first information, the thickness unevenness information, and a total drafting ratio in the downstream process machine, periodic unevenness occurring in the second fiber bundle due to the upstream process machine.
  • this periodic unevenness detecting program due to the above-described reasons, the quality of the fiber bundle can be improved.
  • a periodic unevenness detecting method a textile processing system, a spinning machine, and a periodic unevenness detecting program capable of improving the quality of a fiber bundle.
  • a textile processing system 100 includes a plurality of carding machines 110, a plurality of drawing machines 130, and a plurality of air spinning machines 150.
  • the carding machine 110 cards (combs) a lap produced by an opening and blowing machine in an upstream process of a carding process, and produces a fiber bundle.
  • the carding machine 110 separates fibers by combing the lap of a sheet shape, and removes dust, short fibers, or the like that are contained in the lap. Thereafter, the carding machine 110 collects the fibers remained after removing the dust and short fibers by arranging the fibers in parallel, and produces a rope-like fiber bundle (carded slivers).
  • the carding machine 110 accommodates the produced fiber bundle into a can (for example, a cylindrical container).
  • the fiber bundle produced by the carding machine 110 is, in a state of being accommodated in the can, transported to a subsequent process.
  • the drawing machine 130 draws the fiber bundle produced by the carding machine 110.
  • the drawing machine 130 includes a drafting device 131.
  • the drafting device 131 includes a plurality (for example, three pairs) of roller pairs (first roller pairs) arranged side by side along the traveling direction of the fiber bundle. Each roller pair includes a drive roller and a driven roller.
  • the drawing machine 130 drafts (draws) the fiber bundle by those roller pairs. For example, the drawing machine 130 drafts six or eight fiber bundles together by six-times or eight-times, and eliminates thickness unevenness in the fiber bundles by straightening the fibers.
  • the drawing machine 130 accommodates the drawn out fiber bundle (a first fiber bundle) into a can.
  • the fiber bundle drawn by the drawing machine 130 is, in a state of being accommodated in the can, transported to a subsequent process.
  • the air spinning machine 150 performs spinning on the fiber bundle drawn in the drawing machine 130 and produces yarn (a second fiber bundle) .
  • the air spinning machine 150 produces yarn by drafting and twisting the fiber bundle drawn in the drawing machine 130 and forms a package by winding the yarn.
  • the air spinning machine 150 is an air-jet spinning machine or an open-end spinning machine, for example.
  • the air-jet spinning machine performs spinning on a fiber bundle by a swirl airflow and produces yarn.
  • the open-end spinning machine separates fibers of a fiber bundle by a combing roller or an airflow, and thereafter produces yarn by twisting the fibers while collecting the fibers again.
  • a textile processing method including a carding process of producing a fiber bundle by using the carding machine 110, a drawing process of drawing the fiber bundle produced in the carding process by using the drawing machine 130, and an air spinning process of producing yarn by spinning the fiber bundle drawn in the drawing process by using the air spinning machine 150.
  • the fiber bundle that is produced in the carding machine 110 and supplied to the air spinning machine 150 passes through the drawing machine 130 multiple times.
  • the fiber bundles produced by two carding machines 110 are supplied to a single drawing machine 130 and the fiber bundle drawn by the single drawing machine 130 is supplied to two air spinning machines 150.
  • the two carding machines 110, the single drawing machine 130, and the two air spinning machines 150 constitute a unit of which a processing route of the fiber is the same in the textile processing system 100.
  • the textile processing system 100 may include a sliver lap machine that performs a sliver lap process and a comber that performs a combing process.
  • the textile processing method includes the sliver lap process and the combing process.
  • a sliver lap is produced by winding 18 to 24 rope-like fiber bundles produced in the carding machine 110 as a single sheet.
  • the combing process by combing the sliver lap produced in the sliver lap machine, removing dust and short fibers, and arranging long fibers remaining after removal in parallel, an even (uniform) fiber bundle is produced.
  • the fiber bundle produced in the combing process is supplied to the drawing machine 130.
  • the textile processing system 100 may include, in place of the air spinning machine 150, a roving frame that performs a roving process, a ring spinning frame that performs a spinning process, and an automatic winder that performs a rewinding process.
  • the textile processing method includes the roving process, the spinning process, and the rewinding process, inplace of the air spinning process .
  • roved yarn is produced by drafting and twisting the fiber bundle drawn in the drawing machine 130.
  • yarn is produced by drafting and twisting the roved yarn produced in the roving frame.
  • a package is formed by winding the yarn produced in the ring spinning frame.
  • the textile processing system 100 may be of a single-pass configuration in which the fiber bundle passes through the drawing machine 130 only once.
  • the fiber bundle produced by a single carding machine 110 may be supplied to a single drawing machine 130 and the fiber bundle drawn in the single drawing machine 130 may be supplied to a single air spinning machine 150.
  • the processing route of the fibers by the carding machine 110, the drawing machine 130, and the air spinning machine 150 is not limited, and it only needs to be possible to identify the drawing machine 130 that has lastly drawn the fiber bundle supplied to the air spinning machine 150.
  • the carding machine 110 may include a drafting device.
  • the drafting device is provided on the downstream side of the carding machine 110 and drafts the produced fiber bundle, for example.
  • the drafting device separates the fiber bundle and improves the parallelism of the fiber bundle. In this case, the carding machine 110 accommodates into a can the fiber bundle that has been drafted by the drafting device.
  • the air spinning machine 150 includes a plurality of spinning units 2, a yarn joining carrier 3, a doffing carrier (depiction omitted), a first end frame 4, a second end frame 5, and a plurality of unit controllers (periodic unevenness identifying devices) 10.
  • the spinning units 2 are arrayed in a row. Each spinning unit 2 produces yarn Y and winds the yarn Y into a package P. When the yarn Y is cut or the yarn Y is broken for some reason, the yarn joining carrier 3 performs a yarn joining operation on the relevant spinning unit 2. When the package P is fully wound in a spinning unit 2, the doffing carrier doffs the relevant package P and supplies a new-bobbin B to the relevant spinning unit 2.
  • the first end frame 4 accommodates a collecting apparatus, which collects fiber waste and yarn waste, etc. that generate in the spinning units 2, and the like.
  • the second end frame 5 accommodates an air supplier that adjusts an air pressure of compressed air supplied to the air spinning machine 150 and supplies the air to various sections of the air spinning machine 150, drive motors for supplying power to various components of the spinning units 2, and the like.
  • the second end frame 5 is provided with a machine control device (a first acquisition device, a second acquisition device) 5a, and a touch panel screen 5b.
  • the machine control device 5a centrally manages and controls the various sections of the air spinning machine 150.
  • the touch panel screen 5b can display information concerning at least one of the setting content of and the state of the spinning units 2 .
  • An operator can, perform a setting work of the spinning units 2 by performing operating input by using buttons 5c displayed on the touch panel screen 5b.
  • the unit controller 10 is provided for each certain number of the spinning units 2.
  • the unit controller 10 controls the operation of the spinning units 2.
  • the unit controller 10 is a computer including a processor (for example, a central processing unit (CPU)) that executes an operating system, application programs, and the like, a storage section composed of a read only memory (ROM), a random-access memory (RAM), a hard disk, or the like, and a communication controller composed of a network card or a wireless communications module, for example.
  • the storage section of the unit controller 10 stores data or a database necessary for processing.
  • the unit controller 10 is communicatively coupled to the machine control device 5a and controls the operation of various sections of the spinning units 2 based on operating conditions input to the machine control device 5a.
  • Each spinning unit 2 includes, in order from the upstream side in a traveling direction of the yarn Y, a drafting device 6, a spinning device 7, a yarn monitoring device (a thickness unevenness detector, a periodic unevenness detector) 8, a tension sensor 9, a yarn storage device (a drawing device) 11, a waxing device 12, and a winding apparatus 13.
  • the drafting device 6 drafts a fiber bundle (a sliver, a first fiber bundle) S produced by the drawing machine 130.
  • the drafting device 6 includes, in order from the upstream side in the traveling direction of the fiber bundle S, a back roller (a drafting roller), a third roller (a drafting roller), a middle roller (a drafting roller), and a front roller (a drafting roller), and drafts the fiber bundle S by these rollers. That is, the drafting device 6 includes a plurality of roller pairs (second roller pairs) and drafts the fiber bundle S by those roller pairs.
  • the number of roller pairs (second roller pairs) provided in the drafting device 6 may be three or five.
  • the drafting device 6 drafts the fiber bundle S at a drafting ratio higher than the drafting ratio in the drawing machine 130.
  • the spinning device 7 twists, by a swirl airflow, the fiber bundle S drafted in the drafting device 6 and produces the yarn Y.
  • the yarn storage device 11 draws (pulls) the yarn Y from the spinning device 7.
  • the yarn storage device 11 removes a slack of the yarn Y between the spinning device 7 and the winding apparatus 13.
  • the waxing device 12 applies wax to the yarn Y between the yarn storage device 11 and the winding apparatus 13.
  • the waxing device 12 may be omitted. In the case of not applying wax to the yarn Y, the wax may be removed from the waxing device 12 without omitting the waxing device 12.
  • the winding apparatus 13 winds the yarn Y onto a bobbin B and forms the package P.
  • the yarn monitoring device 8 monitors a state of the travelling yarn Y between the spinning device 7 and the yarn storage device 11.
  • the yarn monitoring device 8 detects thickness unevenness information (periodic unevenness information) concerning periodic unevenness of thickness of the yarn Y.
  • the thickness unevenness information is the information indicating temporal changes in the thickness of the yarn Y, for example.
  • the yarn monitoring device 8 may include a sensor of any type. For example, an optical sensor that irradiates the yarn Y with light and detects temporal changes in the thickness of the yarn Y based on the changes in the amount of receiving light may be used, or a capacitance sensor that causes the yarn Y to pass through an electric field and detects the temporal changes in the thickness of the yarn Y based on the changes in capacitance may be used.
  • the yarn monitoring device 8 detects a presence or an absence of a yarn defect based on a monitoring result.
  • the yarn monitoring device 8 detects, as a yarn defect, at least one of thickness abnormality of the yarn Y and a foreign object that is contained in the yarn Y, for example.
  • the yarn monitoring device 8 detects a presence or an absence of the yarn Y in a yarn path of the yarn Y.
  • the yarn monitoring device 8 transmits a signal indicating a detection result to the unit controller 10.
  • the tension sensor 9 measures the tension of the travelling yarn Y between the spinning device 7 and the yarn storage device 11, and transmits a tension measurement signal to the unit controller 10.
  • the tension sensor 9 may be omitted.
  • the unit controller 10 determines a presence of abnormality based on at least one of the detection result of the yarn monitoring device 8 and the detection result of the tension sensor 9, the yarn Y is cut in the spinning unit 2.
  • the textile processing system 100 by drafting and twisting the fiber bundle S (a first fiber bundle) produced by the drawing machine 130 by the air spinning machine 150, the yarn Y (a second fiber bundle) is produced. That is, the textile processing system 100 includes the drawing machine 130 as an upstream (preceding) process machine, and the air spinning machine 150 as a downstream (post) process machine.
  • first information on the drawing machine 130 is acquired (a first acquisition step) .
  • thickness unevenness information on the yarn Y is detected (a thickness unevenness detecting step).
  • periodic unevenness occurring in the yarn Y due to (caused by) the drawing machine 130 is detected (identified) (a periodic unevenness detecting step, a periodic unevenness identifying step).
  • Such periodic unevenness may be caused due to the mechanical configuration of the drawing machine 130, or may be caused due to a defect such as a scratch formed on a component or eccentricity of a component in the drawing machine 130, for example.
  • the occurrence of the relevant periodic unevenness may be reduced by changing a drafting condition (an operating condition) of the drawing machine 130 or by eliminating the defect that has occurred in the drawing machine 130, for example.
  • second information on the air spinning machine 150 is acquired (a second acquisition step).
  • the periodic unevenness due to the drawing machine 130 can be detected in distinction from the periodic unevenness due to the air spinning machine 150.
  • the periodic unevenness due to the drawing machine 130 can be detected more accurately.
  • the periodic unevenness detecting method in the present embodiment includes the first acquisition step, the second acquisition step, the thickness unevenness detecting step, the periodic unevenness detecting step, a first output step, and a second output step.
  • the periodic unevenness detecting method is performed on the other spinning units 2 also in the same manner.
  • the machine control device 5a acquires the first information on the drawing machine 130.
  • the machine control device 5a acquires the first information by receiving information on operating input for which the operator performed on the touch panel screen 5b.
  • the first information is the information concerning an unevenness factor that can cause unevenness of a short wavelength (a high frequency) in the fiber bundle S produced by the drawing machine 130. That is, the first information is the information concerning the unevenness factor that can cause periodic unevenness in the yarn Y produced by the spinning unit 2.
  • the first information includes the information concerning at least one of the mechanical configuration, the drafting condition, or the like of the drawing machine 130, for example.
  • the first information includes at least one of the diameter of a drive roller, the number of teeth of a pulley of the drive roller, the pitch of grooves (a distance between protruding portions forming the grooves) formed on the drive roller, the number of teeth of a drive gear of the drive roller, and a contact pressure between the drive roller and a driven roller, for example.
  • the first information may not include any of the foregoing information.
  • the above-described drive roller is, out of the roller pairs provided in the drafting device 131, the drive roller (a front bottom roller) of the roller pair arranged on the most downstream side in the traveling direction of the fiber bundle, it may be a drive roller of other roller pairs, for example.
  • the first information may include the diameter of a can that accommodates the fiber bundle produced by the drawing machine 130. This is because the unevenness due to the can accommodation may occur in the fiber bundle.
  • the machine control device 5a acquires the second information on the spinning unit 2.
  • the machine control device 5a acquires the second information by receiving information on operating input for which the operator performed on the touch panel screen 5b.
  • the second information is the information concerning the unevenness factor that can cause the periodic unevenness in the yarn Y, and includes the information concerning at least one of the mechanical configuration, the drafting condition, or the like of the spinning unit 2, for example.
  • the information concerning the mechanical configuration of the spinning unit 2 is the diameter of a drafting roller, the number of teeth of a pulley of the bottom roller, a groove pitch of the bottom roller, and the number of steps of a drive motor for the bottom roller, for example.
  • the information concerning the drafting condition is a drafting ratio (a total drafting ratio and the like), a drafting speed, a drafting gauge (a distance between the drafting roller pairs), for example.
  • the second acquisition step may be performed before or after the first acquisition step, or may be performed simultaneously with the first acquisition step.
  • the total drafting ratio is a difference in circumferential speed between the back roller of the drafting device 6 and the yarn storage device 11 (specifically, a yarn storage roller of the yarn storage device 11), or a difference in the circumferential speed between the back roller and the front roller in the drafting device 6, for example.
  • the yarn monitoring device 8 detects the thickness unevenness information on the yarn Y.
  • the unit controller 10 detects (identifies) the periodic unevenness due to the drawing machine 130.
  • the periodic unevenness detecting step will be further described.
  • the periodic unevenness detecting step by using a frequency distribution 21 about the periodic unevenness of thickness in the yarn Y, the periodic unevenness due to the drawing machine 130 is detected.
  • the frequency distribution 21 is calculated based on the thickness unevenness information on the yarn Y detected by the yarn monitoring device 8.
  • the frequency distribution 21 is compared with a reference distribution 22.
  • the reference distribution 22 is an ideal distribution corresponding to the frequency distribution originally intended to be obtained.
  • the frequency distribution 21 and the reference distribution 22 are distribution (spectrogram) represented on a graph for which the abscissa axis is frequency and the ordinate axis is intensity (the number of counts), for example.
  • the reference distribution 22 can be calculated based on the fineness (a thickness of fibers constituting the fiber bundle S), an average thickness (an average thickness of the fiber bundle S itself), and a rate of fiber lengths (a rate of respective fiber lengths of fibers contained in the fiber bundle S) of the fiber bundle S supplied to the spinning unit 2, for example.
  • Each of the fineness, the average thickness, and the rate of fiber lengths of the fiber bundle S is measured by a predetermined measuring instrument and is input to the machine control device 5a by the operating input of the operator via the touch panel screen 5b, for example.
  • the reference distribution 22 may be calculated based on the drafting condition (for example, a drafting ratio) of the spinning unit 2 further. In FIG. 3 , although the distribution is represented by a curve, the distribution may be represented as a bar graph.
  • certain unevenness is also included in the reference distribution 22 that is an ideal distribution.
  • a peak such as a peak 23 may appear.
  • Such a peak 23 can be caused by the drawing machine 130 or the spinning unit 2.
  • the unit controller 10 determines, based on the first information and the second information, whether the peak 23 is the periodic unevenness caused by the drawing machine 130 or the periodic unevenness caused by the spinning unit 2.
  • the unit controller 10 sets, based on the first information acquired at the first acquisition step and the second information acquired at the second acquisition step, a first frequency peak associated with the first information and a second frequency peak associated with the second information.
  • the first frequency peak may be one or more.
  • the second frequency peak may be one or more.
  • the unit controller 10 determines that, when the peak 23 corresponds to at least one of the first frequency peaks, the peak 23 is the periodic unevenness caused by the drawing machine 130.
  • the unit controller 10 determines that, when the peak 23 corresponds to at least one of the second frequency peaks, the peak 23 is the periodic unevenness caused by the spinning unit 2.
  • a cause of the periodic unevenness due to the drawing machine 130 may be predicted.
  • the value of the peak 23 detected by the air spinning machine 150 differs depending on each mechanical configuration, the drafting condition, and the like of the drawing machine 130.
  • the unit controller 10 sets, based on the first information acquired at the first acquisition step, frequency peaks that differ depending on each piece of the first information (the diameter of the drive roller, the number of teeth of the pulley of the drive roller, and the like), and determines which frequency peak the peak 23 corresponds to. Accordingly, the specific cause of the periodic unevenness due to the drawing machine 130 can be predicted.
  • the frequency distribution 21 and the reference distribution 22 are output to a display screen.
  • the unit controller 10 controls the touch panel screen 5b so as to display the frequency distribution 21 and the reference distribution 22. That is, in this case, the first output step is executed by the touch panel screen 5b as a first output unit.
  • the peak 23 that appears in the frequency distribution 21 is displayed in a form different from the portions other than the peak 23 in the frequency distribution 21.
  • the peak 23 and the portions other than the peak 23 are displayed such that the color, the type, or the thickness of the bar is different from each other. As a result, the operator who visually confirmed the touch panel screen 5b can easily find the peak 23 that appears in the frequency distribution 21.
  • the unit controller 10 controls the touch panel screen 5b so as to display the information for eliminating the relevant periodic unevenness. That is, in this case, the second output step is executed by the touch panel screen 5b as a second output unit.
  • the information output may be the display indicating the cause (a place of occurrence) of the periodic unevenness, or may be a method, advice, or the like for eliminating the detected periodic unevenness, for example.
  • the fiber bundle S supplied to the spinning unit 2 includes unevenness (latent unevenness) of about 2 mm due to the pitch of the grooves formed on the front roller of the drafting device 131 of the drawing machine 130.
  • unevenness can be detected by the yarn monitoring device 8 because it appears in the yarn Y as the periodic unevenness of 400 mm when drafting under a total drafting ratio of 200 is performed by the spinning unit 2, for example.
  • the periodic unevenness detecting method of the present embodiment such periodic unevenness can be detected.
  • the display for urging change of the drafting condition of the drawing machine 130 is output to the touch panel screen 5b, for example.
  • the fiber bundle S supplied to the spinning unit 2 includes unevenness due to a scratch formed on, or to the eccentricity of the front roller of the drafting device 131 of the drawing machine 130.
  • Such unevenness can be detected by the yarn monitoring device 8 because it appears in the yarn Y as the periodic unevenness when drafting is performed by the spinning unit 2.
  • the periodic unevenness detecting method of the present embodiment such periodic unevenness can be detected.
  • the display for urging repair of the scratch of or the eccentricity of the front roller is output to the touch panel screen 5b, for example.
  • a storage section 10a of the unit controller 10 stores a periodic unevenness detecting program C.
  • the storage section 10a is a non-transitory computer-reading storage medium storing therein the periodic unevenness detecting program C.
  • the unit controller 10 implements the periodic unevenness detecting method by making the processor load and execute the periodic unevenness detecting program C.
  • the periodic unevenness detecting program C includes a first acquisition module C1, a second acquisition module C2, a thickness unevenness detecting module C3, a periodic unevenness detecting module C4, a first output module C5, and a second output module C6.
  • the processing implemented by executing the first acquisition module C1, the second acquisition module C2, the thickness unevenness detecting module C3, the periodic unevenness detecting module C4, the first output module C5, and the second output module C6 is the same as the processing of the above-described first acquisition step, the second acquisition step, the thickness unevenness detecting step, the periodic unevenness detecting step, the first output step, and the second output step, respectively.
  • the periodic unevenness detecting program C may be provided by being permanently recorded on a tangible recording medium such as a CD-ROM, a DVD-ROM, and a semiconductor memory, for example.
  • the periodic unevenness detecting program C may be provided via a communication network as a data signal.
  • the periodic unevenness detecting method of the present embodiment the periodic unevenness that occurs in the yarn Y due to the drawing machine 130 is detected, based on the first information concerning the drawing machine 130 that produces the fiber bundle S and the thickness unevenness information on the yarn Y produced by the spinning unit 2. Accordingly, when the periodic unevenness due to the drawing machine 130 is detected, the occurrence of the relevant periodic unevenness can be avoided by changing the operating condition of the drawing machine 130 or by eliminating the defect that has occurred in the drawing machine 130, for example. Thus, according to the periodic unevenness detecting method of the present embodiment, the quality of the fiber bundle (the fiber bundle S and the yarn Y) can be improved.
  • this periodic unevenness detecting method by monitoring the yarn Y produced in each spinning unit 2 at all times, the periodic unevenness that occurs in the yarn Y due to the drawing machine 130 can be detected. That is, when a general measuring instrument is used, only a part of the fiber bundle S before being drafted by the air spinning machine 150 can be measured, but in the periodic unevenness detecting method of the present embodiment, the detection can be performed on the entire fiber bundle S drafted by the air spinning machine 150.
  • the periodic unevenness detecting step by using, as the thickness unevenness information, the frequency distribution 21 about the periodic unevenness of thickness of the yarn Y, the periodic unevenness due to the drawing machine 130 is detected. Accordingly, because the interval of the periodic unevenness included in the fiber bundle S is increased as the fiber bundle S is drafted by the spinning unit 2, the periodic unevenness due to the drawing machine 130 can be detected more suitably.
  • the periodic unevenness detecting step provided that the reference distribution 22 is a distribution calculated based on the fineness, the average thickness, and the rate of fiber lengths of the fiber bundle S, and the total drafting ratio, the periodic unevenness due to the drawing machine 130 is detected based on a comparison result of the reference distribution 22 and the frequency distribution 21. Accordingly, by referring to the reference distribution 22 also, the periodic unevenness due to the drawing machine 130 can be detected further accurately.
  • the periodic unevenness detecting step by determining whether a peak corresponding to the periodic unevenness has appeared in the frequency distribution 21, the periodic unevenness is detected. As a result, the periodic unevenness due to the drawing machine 130 can be detected more accurately.
  • the peak 23 that appears in the frequency distribution 21 is displayed in a form different from the portions other than the peak 23 in the frequency distribution 21. As a result, the operator who visually confirmed the display screen can find with ease the peak 23 that appears in the frequency distribution 21.
  • the cause of the periodic unevenness due to the drawing machine 130 is predicted (estimated) . Accordingly, the cause of the periodic unevenness that is due to the drawing machine 130 can be learnt.
  • Such a periodic unevenness detecting method is advantageous in that an operator can learn the cause of the periodic unevenness that is due to the drawing machine 130, even without in-depth knowledge concerning the drawing machine 130, the periodic unevenness due to the drawing machine 130, and the like (even when the operator is not an adept).
  • the periodic unevenness detecting step based further on the second information, the periodic unevenness due to the drawing machine 130 is detected. Accordingly, because the periodic unevenness due to the drawing machine 130 and the periodic unevenness due to the air spinning machine 150 can be distinguished, the periodic unevenness due to the drawing machine 130 can be detected further accurately.
  • the spinning unit 2 drafts the fiber bundle S at a drafting ratio higher than the drafting ratio in the drawing machine 130. Accordingly, because the periodic unevenness due to the drawing machine 130 easily appears, the periodic unevenness due to the drawing machine 130 can be detected further suitably.
  • the spinning unit 2 includes the drafting device 6 configured to draft the fiber bundle S, the spinning device 7 configured to twist the fiber bundle S drafted by the drafting device 6 and to produce the yarn Y, and the winding apparatus 13 configured to wind the yarn Y and to form the package P.
  • the total length of the yarn Y wound into the package P is long and also the drafting ratio is higher than that of the drawing machine 130, the periodic unevenness due to the drawing machine 130 can be detected further suitably.
  • the first information includes at least one of the diameter of a drive roller, the number of teeth of the pulley of the drive roller, the pitch of the grooves formed on the drive roller, the number of teeth of the drive gear of the drive roller, the contact pressure between the drive roller and the driven roller, and the diameter of a can in which the fiber bundle produced by the drawing machine 130 is accommodated, for example. Accordingly, because the period at which the periodic unevenness may occur can be predicted, the periodic unevenness due to the drawing machine 130 can be detected further suitably.
  • the periodic unevenness detecting method of the present embodiment includes the second output step in which, when the periodic unevenness due to the drawing machine 130 is detected at the periodic unevenness detecting step, the information for eliminating the relevant periodic unevenness is output. Accordingly, when the periodic unevenness due to the drawing machine 130 is detected, the measures to avoid the occurrence of the relevant periodic unevenness can be urged.
  • the first information is acquired by the operating input of the operator.
  • the spinning unit 2 includes a plurality of roller pairs (second roller pairs) and drafts the fiber bundle S by those roller pairs. Accordingly, because the fiber bundle S is stretched without the constituting fibers being separated, the periodic unevenness due to the drawing machine 130 can be detected reliably.
  • the machine control device 5a has acquired the first information by receiving the operating input, but in lieu of or in addition to the operating input, the first information may be acquired by wireless communication or wired communication.
  • the first information may be acquired from the drawing machine 130 by the wireless communication.
  • a wireless communication section that performs wireless communication functions as the first acquisition device that executes the first acquisition step.
  • the second information may be acquired by wireless communication or wired communication.
  • a keyboard, push buttons, or the like may be used.
  • the first information may be acquired by reading, by a reading device 33, the information stored in an information tag 32 provided on a can 31 in which the fiber bundle S is accommodated.
  • the reading device 33 may be provided for each spinning unit 2, or one reading device 33 may be provided for the air spinning machine 150. Writing the information into the information tag 32 is performed by the drawing machine 130, for example.
  • the reference distribution 22 has been calculated by the unit controller 10, but when the distribution corresponding to the reference distribution 22 is calculated by the drawing machine 130, the relevant distribution received from the drawing machine 130 may be used in lieu of the reference distribution 22.
  • the absolute values of the distribution are different between the spectrogram of the drawing machine 130 and the spectrogram of the air spinning machine 150, the relative values are the same, and thus the distribution received from the drawing machine 130 may be used in lieu of the reference distribution 22.
  • the periodic unevenness detecting step of the above-described embodiment in lieu of the frequency distribution 21, by using a wavelength distribution of the thickness unevenness of the yarn Y, the periodic unevenness due to the drawing machine 130 may be detected.
  • the wavelength distribution and the reference distribution are the distributions represented on a graph for which the abscissa axis is wavelength and the ordinate axis is intensity, for example.
  • the periodic unevenness detecting step of the above-described embodiment may be executed by the machine control device 5a.
  • the periodic unevenness detecting step may be executed by a computer provided separately from the drawing machine 130 and the air spinning machine 150, and may be executed by a central management computer of a textile mill, for example.
  • the periodic unevenness due to the drawing machine 130 has been detected based on both the first information and the second information, but the second information does not necessarily need to be used.
  • the frequency distribution 21 and the reference distribution 22 have been displayed on the touch panel screen 5b, but the frequency distribution 21 and the reference distribution 22 may be displayed on a display device that the drawing machine 130 has or a portable display device (including a tablet or a smartphone).
  • the information for eliminating the periodic unevenness has been displayed on the touch panel screen 5b, but the relevant information may be displayed on a display device that the drawing machine 130 has or a portable display device (including a tablet or a smartphone). Alternatively, paper on which the relevant information is described may be printed.
  • the frequency distribution 21 and the reference distribution 22, and the information for eliminating the periodic unevenness may be displayed together on a single display device or may be displayed on two different display devices separately.
  • the second output step may display information that urges returning, to the opening and blowing machine, the fiber bundles S (cans) that have been produced up to the relevant detection from the time point of start of production of the fiber bundles S.
  • the cans accommodating the fiber bundles S that have been produced up to the relevant detection from the time point of start of production of the fiber bundles S may be automatically transferred to the drawing machine 130.
  • the fiber bundle S has no choice but to be discarded if it is processed once into the yarn Y (the package P), but if in a state of the fiber bundle S, the fiber bundle S can be reused by returning it to the opening and blowing machine.
  • a combination may be the drawing machine 130 (an upstream process machine) and a roving frame (a downstream process machine) .
  • the first fiber bundle is a drawing sliver and the second fiber bundle is roved yarn.
  • a combination may be a roving frame (an upstream process machine) and a ring spinning frame (a downstream process machine).
  • the first fiber bundle is roved yarn and the second fiber bundle is yarn. That is, the downstream process machine only needs to be a textile machine that produces the second fiber bundle by at least drafting the first fiber bundle that is produced by the upstream process machine and it does not necessarily need to be a textile machine that twists the fiber bundle.
  • the air spinning machine 150 includes the spinning unit 2 including the drafting device 6 configured to draft the fiber bundle S, the spinning device 7 configured to twist the drafted fiber bundle S and to produce the yarn Y, and the winding apparatus 13 configured to wind the yarn Y and to form the package P; the thickness unevenness detector (the yarn monitoring device 8) configured to detect the thickness unevenness information concerning periodic unevenness of thickness in the yarn Y; the first acquisition device (the machine control device 5a) configured to acquire the first information concerning the upstream process machine (the drawing machine 130) configured to produce the fiber bundle S; and the periodic unevenness identifying device (the unit controller 10) configured to detect the periodic unevenness occurring in the yarn Y due to the upstream process machine based on the first information and the thickness unevenness information.
  • the air spinning machine 150 includes a plurality of spinning units 2, and the periodic unevenness identifying device identifies, on each of the spinning units 2, the periodic unevenness occurring in
  • the various devices in the direction of machine height (vertical direction), the various devices have been arranged such that the yarn Y supplied on the upper side is wound on the lower side.
  • the various devices may be arranged such that the yarn Y supplied on the lower side is wound on the upper side.
  • the spinning unit 2 may draw out the yarn Y from the spinning device 7 by not the yarn storage device 11 but a delivery roller pair (a drawing device).
  • the total drafting ratio may be the difference in the circumferential speed between the back roller of the drafting device 6 and the delivery roller pair.
  • the drafting device 6 only needs to include at least the back roller, the middle roller, and the front roller, and may include an additional pair of back rollers, for example.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP19181965.5A 2018-06-25 2019-06-24 Verfahren zur erfassung periodischer unebenheiten, textilverarbeitungssystem, spinnmaschine und programm zur erkennung periodischer unebenheiten Withdrawn EP3587636A1 (de)

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JP2018119662A JP2020002477A (ja) 2018-06-25 2018-06-25 周期斑検出方法、繊維処理システム、紡績機、周期斑検出プログラム

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07138822A (ja) 1993-11-10 1995-05-30 Murata Mach Ltd 繊維機械におけるスライバ良否判定方法
DE102005019760A1 (de) * 2004-05-29 2005-12-22 Rieter Ingolstadt Spinnereimaschinenbau Ag Spinnereimaschine mit einem Streckwerk zum Verstrecken eines Faserverbandes und entsprechendes Verfahren
JP2011020836A (ja) * 2009-07-17 2011-02-03 Murata Machinery Ltd 繊維機械管理システム及び精紡ワインダ
JP2014009422A (ja) 2012-06-29 2014-01-20 Murata Mach Ltd 繊維機械、及び繊維機械の周期斑検出方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1707001B (zh) * 2004-05-29 2011-05-04 利特英格纺织机械制造股份公司 具有用于牵伸纤维结合条子的牵伸装置的精纺准备机及其应用的方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07138822A (ja) 1993-11-10 1995-05-30 Murata Mach Ltd 繊維機械におけるスライバ良否判定方法
DE102005019760A1 (de) * 2004-05-29 2005-12-22 Rieter Ingolstadt Spinnereimaschinenbau Ag Spinnereimaschine mit einem Streckwerk zum Verstrecken eines Faserverbandes und entsprechendes Verfahren
JP2011020836A (ja) * 2009-07-17 2011-02-03 Murata Machinery Ltd 繊維機械管理システム及び精紡ワインダ
JP2014009422A (ja) 2012-06-29 2014-01-20 Murata Mach Ltd 繊維機械、及び繊維機械の周期斑検出方法
EP2687627A1 (de) * 2012-06-29 2014-01-22 Murata Machinery, Ltd. Textilmaschine und Verfahren zur regelmäßigen Ungleichmäßigkeitserkennung dafür

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