EP3708700A1 - Roving-rahmen mit einem überwachungssystem - Google Patents

Roving-rahmen mit einem überwachungssystem Download PDF

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Publication number
EP3708700A1
EP3708700A1 EP19175743.4A EP19175743A EP3708700A1 EP 3708700 A1 EP3708700 A1 EP 3708700A1 EP 19175743 A EP19175743 A EP 19175743A EP 3708700 A1 EP3708700 A1 EP 3708700A1
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EP
European Patent Office
Prior art keywords
roving
production
measurement
quality
sensor
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.)
Pending
Application number
EP19175743.4A
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English (en)
French (fr)
Inventor
Kavitha Chandran
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Individual
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Individual
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Filing date
Publication date
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Publication of EP3708700A1 publication Critical patent/EP3708700A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/24—Flyer or like arrangements
    • 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
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
    • 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

Definitions

  • the present subject matter described herein relates to the field of producing a roving from a sliver.
  • the invention relates to a roving frame according to the preamble of claim 1.
  • the invention further concerns a measurement unit for a roving frame, an individual roving production position monitoring system with a plurality of measurement units and a method for monitoring the roving production in a roving frame.
  • a roving is produced from a sliver.
  • the sliver is produced upstream of the yarn production process in a drawframe.
  • the roving is the starting product for producing a yarn e.g. in a ring spinning machine.
  • the roving is significantly thicker than a yarn but also significantly thinner than a sliver.
  • Ring spinning is a method of spinning fibres, such as cotton, flax, wool, synthetic or a mixture thereof, to make a textile yarn. Accordingly, the roving can be of one of the aforementioned materials.
  • the main task of a roving frame is to further draft a sliver into a fibre strand of finer count, the so called roving.
  • This intermediate production step is necessary as the ring spinning machine is not capable of processing a thick sliver to a yarn of fine count.
  • the handling of a sliver in a ring spinning machine is still unsolved. This, because there is not enough space in the ring spinning machine for storing the bulky sliver cans in which the sliver is provided due to the poor strength of the sliver.
  • Another task of the roving frame is to insert a protective twist into the roving in order to enhance the strength of the textile fibre strand and thus make it transportable without being damaged since the sliver as well as the roving of fine count produced from the sliver has scarcely a coherence without a protective twist.
  • the protective twist is a slight twist which only serves for giving the roving enough (tensile) strength, that is to say stability for transportation.
  • the protective twist is resolved again in the drafting arrangement of the ring spinning machine.
  • a roving frame as known from the state of the art comprises a plurality of roving production positions in which in each case a roving is produced from a sliver.
  • the sliver is provided from a sliver can and guided via a creel to and through a drafting arrangement in which the sliver is drafted to the thickness of a roving.
  • the drafted sliver leaves the drafting arrangement through delivery rollers and is transported towards a rotating flyer.
  • the roving is wound by the rotating flyer onto a bobbin arranged on a rotating spindle.
  • the protective twist is brought into the roving between the delivery rollers of the drafting arrangement and the bobbin by means of the rotating flyer while winding the roving onto the bobbin. Normally, the roving is guided within a leg of the flyer towards the winding position on the bobbin surface.
  • the flyer rotates around the rotating spindle and hence around the bobbin.
  • the flyer has the two functions of applying a protective twist to the roving and for winding the roving onto the bobbin.
  • the flyer functionally corresponds to the ring traveller of the ring spinning machine.
  • a high quality yarn is produced in a ring spinning machine.
  • a high quality yarn is produced in a ring spinning machine.
  • the quality parameters measured in a ring spinning machine are only useful for taking any steps downstream of the production process. Furthermore, the measured quality parameters do not allow sound conclusions regarding the quality of the roving. This, because the roving already has been processed and thus altered by the drafting arrangement of the ring spinning machine before any quality parameters are measured downstream of the drafting arrangement.
  • the invention concerns a roving frame for producing a roving from a sliver with a plurality of roving production positions each comprising a drafting arrangement, a spindle for receiving a bobbin and a flyer for winding up the roving onto the bobbin.
  • the roving frame comprises a measurement set-up with at least one measurement unit arranged on each roving production position between the delivery rollers of the drafting arrangement and the flyer.
  • Said plurality of measurement units in each case contain at least one sensor.
  • the measurement set-up can be configured for continuously measuring at least one quality parameter of the roving at each roving production position by means of the plurality of measurement units.
  • the measurement set-up can be configured for continuously measuring at least one production parameter of the roving at each roving production position by means of the plurality of measurement units.
  • the measurement set-up can be configured for continuously measuring at least one quality parameter and at least one production parameter of the roving at each roving production position by means of the plurality of measurement units.
  • the at least one quality and/or production parameter are measured on-line.
  • the at least one quality and/or production parameter are measured in real-time.
  • the continuous measuring of at least one quality and/or production parameter of the roving is based on a continuous production of the roving and thus on a continuous transport of the roving within the roving frame.
  • the roving is continuously transported through the measurement unit, that is to say through the measuring field of the sensor.
  • the measurement set-up is configured to continuously measure one or more of the following quality parameters of the roving online:
  • Foreign matter in particular is trash, that is to say debris.
  • Foreign matter can be organic elements such as seed coats, or inorganic matter such as plastic, e.g. polypropylene.
  • the plastic material can be of different colours and be transparent or opaque.
  • the at least one sensor can measure mass per unit length or linear mass density.
  • the at least one sensor can measure the hairiness of the roving.
  • Quality parameters relating to the thickness of the roving in particular can be derived from sensor signals, that is to say sensor data, given by a capacitive or an optical sensor.
  • Hairiness, foreign matters are usually determined by an optical sensor.
  • a production parameter serves for characterising the running status of continuously transported roving.
  • production parameters are related to a quantity of a production process and/or to a status of a roving production position.
  • Examples for the running status can correspond to the following: “Running” or “stopped”. Parameters associated with “Running” can comprise one or more of
  • Parameters associated with "Stopped” can comprise one or more of
  • At least one sensor can measure the presence of a roving and thus a roving break.
  • the at least one sensor can be an optical sensor.
  • the optical sensor can be designed for measuring reflectivity of light e.g. in the visible and/or infrared and/or ultraviolet (UV) spectrum.
  • the optical sensor can be designed for measuring occlusion, i.e. absorption of light (shadow information) e.g. in the visible and/or infrared and/or ultraviolet (UV) spectrum.
  • occlusion i.e. absorption of light (shadow information) e.g. in the visible and/or infrared and/or ultraviolet (UV) spectrum.
  • the optical sensor in particular can be an infrared sensor or an UV-sensor.
  • the optical sensor can also be a camera.
  • the camera in particular contains an image sensor, in particular an active-pixel sensor (APS), such as a CMOS sensor using CMOS technology.
  • APS active-pixel sensor
  • the optical sensor can comprise an optical lens, in particular for focusing or dispersing a light beam by means of refraction.
  • the optical sensor can comprise at least one sensor element arranged to measure the at least one quality and/or parameter.
  • the at least one sensor element can also be designed for measuring several quality parameters, or several production parameters or at least one quality and at least one production parameter
  • the optical sensor can also comprise a plurality of sensor elements/multiple sensor elements for measuring several quality parameters or several production parameters or at least one quality and production parameter.
  • the senor is configured to generate a sensor signal from readings of a single one of the at least one sensor elements, or from readings of two or more of the at least one sensor elements.
  • the at least one sensor can also be a capacitive sensor, also called capacitance sensor.
  • the roving is guided between two electrodes of the capacitance sensor and thus changes the dielectric properties therebetween.
  • the changing dielectric properties can be used to derive at least one quality and/or production parameter of the roving.
  • the at least one sensor can also be a mechanical sensor.
  • the mechanical sensor can be a displacement sensor.
  • Such a displacement sensor can comprise a biased lever which lies against the roving, in particular presses against the roving.
  • a change of roving thickness causes a deflection, that is to say a displacement, of the biased lever. From the extent of displacement at least one quality and/or production parameter can be derived.
  • the contact surface of the lever for establishing a contact with the roving can be arranged underneath the roving.
  • the contact surface of the lever can be arranged above the roving.
  • the contact surface of the lever can be arranged laterally of the roving.
  • At least one quality parameter and at least one production parameter are measured with one single sensor.
  • the measurement units in each case contains only one single sensor for measuring in each case at least one of a quality parameter and production parameter.
  • the measurement units in each case contain two, three or more than three, that is to say several sensors for measuring in each case at least one of a quality parameter and production parameter.
  • the measurement units in each case can be configured for measuring at least one quality parameter and at least one production parameter as well.
  • the measurement units in each case can be configured for measuring at least one quality parameter. This can be only one quality parameter. This can be two, three, or more than three, that is to say several or a plurality of quality parameters.
  • the measurement units in each case can be configured for measuring at least one production parameter. This can be only one production parameter. This can be two, three, or more than three, that is to say several or a plurality of production parameters.
  • the measurement units in each case can be configured for measuring at least one quality parameter and at least one production parameter as well.
  • At least one first sensor of the measurement units measures at least one quality parameter and at least one second sensor of the measurement units measures at least one production parameter.
  • the measurement unit is a quality measurement unit which only measures one or more quality parameters.
  • the measurement unit is a production measurement unit which only measures one or more production parameters.
  • the measurement set-up can comprise a quality measurement unit for measuring at least one quality parameter and a production measurement unit for measuring at least one production parameter as well. This two units are arranged on each roving production position.
  • the quality and production measurement units can be designed as separate modules.
  • the two modules, within the roving production position, can be arranged on different places between the drafting arrangement and the flyer.
  • the quality and production measurement units can also be arranged on a common carrier structure.
  • the measurement set-up can further comprise at least one roving frame computer arrangement for collecting and/or evaluating the measuring results of the plurality of measurement units provided on the roving production positions of the roving frame.
  • the measuring results which are transmitted to the roving frame computer arrangement can be a quality and/or production parameter or a deviation of the quality and/or production parameter from a reference value, furthermore can be sensor raw data or interim values for evaluating a quality and/or production parameter or a mentioned deviation.
  • the roving frame computer arrangement is arranged on the roving frame.
  • a individual roving production position monitoring system which comprises the measurement set-up can comprise a superordinate computer arrangement for collecting and/or evaluating the measuring results provided by at least one roving frame computer arrangement or provided directly from the plurality of measurement units on the roving production positions of at least one roving frame.
  • the measuring results which are transmitted to the at least one superordinate computer arrangement can be a quality and/or production parameter, sensor data or interim values for evaluating a quality and/or production parameter.
  • the superordinate computer arrangement in particular is arranged outside the roving frame, but can also be arranged on a roving frame.
  • the superordinate computer arrangement is configured to collect and/or evaluate measuring results from the roving frame computer arrangements or directly from the measurement units of several roving frames.
  • the superordinate computer arrangement can correspond to a central computer arrangement. However, the superordinate computer arrangement can also be configured to transmit the measuring results to a central computer arrangement.
  • the individual roving production position monitoring system can further comprise a central computer arrangement which in particular is located outside the roving frame, e.g. in a computer or quality and production control room.
  • the central computer arrangement in particular comprises a display unit for displaying measuring information as described further below.
  • the central computer arrangement can e.g. be a desktop computer with a display unit, such as a screen.
  • the central computer arrangement can also be a handheld device such as a smartphone or PDA or (tablet) computer.
  • the handheld device can be a third-party device.
  • each measurement unit comprises a sensor data processing unit.
  • a sensor data processing unit can be designed for determining the quality and/or production parameter from the sensor raw data, that is to say from sensor signals.
  • a sensor data processing unit can be designed for determining deviations of the quality and/or production parameters from a reference value from the sensor raw data, that is to say from sensor signals.
  • a sensor data processing unit can be designed for determining intermediate/interim values from the sensor raw data, that is to say from sensor signals.
  • processed sensor data The above mentioned quality and/or production parameter, deviations of the quality and/or production parameters from a reference value and intermediate/interim values, hereinafter generally are called "processed sensor data".
  • the at least one sensor can be integrated into the sensor data processing unit. I.e., the sensor data processing unit and the at least one sensor can form a sensor module.
  • the sensor data processing unit evaluates the sensor raw data and converts the sensor raw data into processed sensor data.
  • processed sensor data are evaluated within the measurement unit(s).
  • the processed sensor data in particular are transmitted to a roving frame computer arrangement or directly to a superordinate computer arrangement, as mentioned above, for further processing.
  • the sensor raw data are transmitted from the measurement units to a roving frame computer arrangement or a superordinate computer arrangement for evaluating processed sensor data.
  • the roving frame computer arrangement or the superordinate computer arrangement comprises a common sensor data processing unit.
  • the measurement units in each case comprise a visual indicator to indicate at least one quality and/or production parameter information.
  • the visual indicator is designed to indicate at least one quality and/or production parameter information.
  • the quality and/or production parameter information can be a quality and/or production parameter or a deviation of a quality and/or production parameter from a reference value.
  • the visual indicator can be configured to indicate a deviation of such a quality and/or production parameter from a reference value, hereinafter simplified called "deviation".
  • the visual indicator can also be configured to give an alert to the operation personnel in case of a deviation.
  • a central/common visual indicator is arranged for indicating quality and/or production parameter information of the roving production positions of said roving frame.
  • the visual indicator in particular comprises at least one of:
  • the individual roving production position monitoring system or more specific the measurement set-up can comprise at least one display unit for displaying quality and/or production parameter information.
  • the at least one display unit can e.g. be a display, a screen or a monitor.
  • the measurement set-up comprises a roving frame display unit which is arranged on the roving frame.
  • a roving frame display unit can be arranged on each roving frame.
  • the roving frame display unit can be integrated into a roving frame computer arrangement as described further above.
  • the roving frame display unit in particular serves for displaying quality and/or production parameter information of the roving production positions of said roving frame.
  • the roving frame display unit can be arranged on the head or foot end of the roving frame.
  • the individual roving production position monitoring system comprises a central/common display unit which in particular is arranged outside the roving frame.
  • the central/common display unit can be part of a superordinate, in particular central computer arrangement as described further above.
  • a display unit as a part of the measurement set-up can be arranged on each roving production position for displaying quality and/or production parameter information of a roving production position.
  • the display unit can be integrated into measurement unit as already described above.
  • the display unit in particular is configured to display at least one of:
  • Such information can be provided by a monitoring unit as described further below.
  • the at least one display unit in particular a central/common display unit or a roving frame display unit can be provided with the data from a monitoring unit.
  • the monitoring unit can be part of a superordinate, in particular central computer arrangement as described above.
  • the monitoring unit can be part of a roving frame computer arrangement as described above. I.e., in this case every roving frame computer arrangement comprises a monitoring unit.
  • the roving frame display unit or a common display unit is provided with the data (directly) from the measurement units.
  • a communication between a roving frame computer arrangement or a superordinate computer arrangement and the measurement units can be wire-based or wireless.
  • a communication between a roving frame display unit or a common display unit and the roving frame computer arrangement or a superordinate computer arrangement can be wire-based or wireless.
  • a communication between a roving frame display unit or a common display unit and the measurement units can be wire-based or wireless.
  • the at least one display unit can be part of the measurement set-up or broader defined of an individual roving production position monitoring system itself, in particular of a superordinate computer arrangement thereof.
  • the at least one display unit in particular a common display unit can also be implemented by a handheld device such as a smartphone or PDA or (tablet) computer.
  • the handheld device can be a third-party device.
  • the present invention also concerns an individual roving production position monitoring system, that is to say an individual roving production position online monitoring system, with a measurement set-up comprising a plurality of measurement units each having at least one sensor for continuously measuring at least one quality and/or production parameter of a roving at each roving production position of a roving frame.
  • the measurement set-up of the individual roving production position monitoring system comprises all the features, that is to say components, of the individual roving production position monitoring system which are arranged within the roving frame.
  • certain features that is to say components, such as e.g. a monitoring unit or a superordinate computer arrangement, of the individual roving production position monitoring system can be arranged outside the roving frame.
  • the individual roving production position monitoring system for on-line roving quality monitoring in a roving frame allows for at least one of the following benefits:
  • the individual roving production position monitoring system in particular comprises a superordinate computer arrangement - as mentioned above - for collecting and/or evaluating the measuring results, in particular the quality and/or production parameters of the plurality of measurement units provided on the roving production positions.
  • the measured quality and/or production parameters or their deviation from a reference value can be the basis for further use and analyses.
  • the individual roving production position monitoring system in particular comprises a monitoring unit that is configured to
  • the monitoring of the at least one quality and/or production parameter is online.
  • the monitoring of the at least one quality and/or production parameter in particular is in real-time.
  • the monitoring unit can be a dedicated hardware unit, e.g. of a superordinate computer arrangement or a roving frame computer arrangement, or it can be implemented as a software function in a superordinate computer arrangement or a roving frame computer arrangement.
  • the monitoring unit can also be a separate unit, which e.g. communicates by wire or wireless with a superordinate computer arrangement.
  • monitoring unit can also communicate by wire or wireless (directly) with the measurement units.
  • the monitoring unit can be arranged within the roving frame. However, the monitoring unit in particular is arranged outside the roving frame, e.g. in a computer room or quality control room or on a mobile device as mentioned above.
  • the monitoring unit can be configured to display the quality measurements in graphical formats like diagram, Spectrogram, histogram, VL (variance length) curves, thick and thin distribution, foreign scatter chart, etc., e.g. on the at least one display unit.
  • a signal - typically optical or acoustical - to an operator can be generated, and/or an error logfile can be updated with information about the malfunction.
  • the signal can also be indicated at the measurement units as mentioned above.
  • the monitoring unit is configured to detect thin places, and to identify a malfunction of feeding slivers when too many thin places occur.
  • the monitoring unit is configured to monitor a first and a second of two adjacent roving production positions, with a first quality and/or production parameter measured at the first roving production position and a second quality and/or production parameter measured at the second roving production position, and to identify a malfunction of drafting rollers for the two roving production positions when the first and the second quality and/or production parameter deviate in the same way.
  • the monitoring unit is configured to detect when the thickness of a roving deviates from a reference thickness for a time that is longer than a time limit, and to identify a malfunction of the drafting system if this is detected.
  • the monitoring unit can be arranged to operate as in the following embodiments: When each of the roving production positions is monitored through the individual roving production position monitoring system, then the reason for deviation in quality and/or production parameters can be determined immediately as the roving production takes place.
  • machinery part defects in each roving production position will be identified easily by observing a quality and/or production parameter deviation.
  • One example is identifying the reason for high thin places (that is, unacceptably thin places) in roving:
  • the reason for high thin places may be due to improper and irregular feeding of sliver material. More particular, the reason can be an obstruction of the free movement of the sliver between the sliver can and the drafting arrangement, which causes an uncontrolled drawing of the sliver upstream of the drafting arrangement.
  • the obstructing can be identified.
  • a further quality parameter is hairiness, determined by a measurement of the fibres protruding over the roving.
  • One cause of deviations of hairiness are deviations in preparatory processes which cause more short fibres in the sliver that enters the roving frame, which in turn creates more hairiness of the roving produced.
  • hairiness monitoring in the roving production machine can alert an operator, indicating deviations of hairiness exceeding a given limit.
  • the individual roving production position monitoring system in particular is configured for autonomous operation.
  • Autonomous in particular means that the system is not linked to the machine control or another control arrangement of the roving frame for receiving commands.
  • the system is independent from the manufacturer of roving frame and thus can be applied on roving frames of different manufacturer.
  • the system is suitable for retrofitting or upgrading of existing roving frames.
  • the individual roving production position monitoring system or its measurement set-up is interlinked with the machine control of the roving frame, e.g. for receiving control information from the machine control or for transmitting control commands to the machine control.
  • the individual roving production position monitoring system or its measurement set-up in particular can be interlinked with the machine control of the roving frame in such a way that they are able to transmit commands, such as a machine stop, to the machine control.
  • commands such as a machine stop
  • the roving frame can be stopped by the individual roving production position monitoring system or its measurement set-up.
  • the reason for the machine stop can be intimated to the operation personnel through various light indications, computer, display units and/or communication devices like hand held devices or acoustically.
  • the measurement units in each case comprises a guidance device for guiding the roving through the measurement unit, in particular through a measurement area, that is to say measuring field of the measurement unit.
  • the guidance device forms a support for the roving.
  • the support in particular forms a contact surface for supporting the roving.
  • the support supports the roving in particular from below. Accordingly, the contact surface is arranged underneath the passing roving.
  • the contact surface can also be arranged above the passing roving for supporting the roving from above.
  • the contact surface can also be arranged laterally from the passing roving for supporting the roving from the side.
  • the support with its contact surface serves for tensioning the roving passing through the measurement area of the sensor.
  • the contact surface of the support can be made of a ceramic material.
  • the ceramic material can be a coating or a solid body.
  • the support serves for correctly positioning and stabilising the passing roving within the measurement area of the sensor. Further, the support serves for avoiding a swinging that is to say oscillation of the roving while passing through the measurement area.
  • the guidance device contains a first and a second support structure each having a contact surface for supporting the roving from below.
  • the first and second support structure are arranged in succession and in distance to each other as viewed in the transport direction of the roving.
  • the measurement area as viewed in roving transport direction is located in a roving path section arranged between the first and second support structure.
  • a passage is formed which is open in the downwards direction, so that fibre fragments or dust can fall downwards through the passage out of the measurement unit, that is to say out of the measurement area.
  • the passage is located underneath the roving path.
  • the passage is located underneath the measurement area.
  • the passage is formed between the first and second of the above mentioned support structures.
  • the optical sensor of the measurement unit in particular comprises a signal source and a signal detector.
  • the signal source in particular is a light source.
  • the signal detector in particular is a photoelectric receiver.
  • the signal source and a signal detector of the sensor are arranged laterally from the passing roving, that is to say from the roving path.
  • the signal source and the signal detector are arranged on opposite sides relative to the passing roving, that is to say the roving path.
  • the measurement area is arranged between the signal source and the signal detector through which the roving is guided, that is to say through which the roving path leads.
  • the signal source and the signal detector are arranged on a common side relative to the roving guided past the at least one sensor, that is to say roving path.
  • the measurement area in particular is established laterally of the sensor.
  • the signal source and the signal detector can be arranged in a common assembly.
  • the measurement unit is designed as a module. I.e. the measurement unit is designed as a construction unit.
  • the measurement unit in particular has a common carrier structure for mounting on a fixation provided at the roving frame.
  • the components of the measurement unit in particular are arranged in a common housing.
  • the measurement unit in particular is mounted on a fixation provided on the roving frame.
  • the fixation can be a mounting rod which extents across the roving production positions between the delivery rollers of the drafting arrangement and the flyer.
  • the fixation is a non-moving part of the roving frame.
  • the invention also concerns a method for upgrading a roving frame comprising the steps of:
  • the invention also concerns a method for monitoring the roving production in a roving frame, characterised by the following steps:
  • the roving frame 1 according to figure 1 comprises a plurality of roving production positions 6. Such a roving production position 6 is shown in figure 2 in more detail.
  • each roving production position 6 a roving 11 is produced from a sliver 8 which is fed from a sliver can 7.
  • the sliver 8 is guided via deflection rollers of a creel 9 towards a drafting arrangement 10 and transported through the drafting arrangement 10 in a transport direction D.
  • the sliver 8 is drafted in the drafting arrangement 10 into a thinner roving 11 which leaves the drafting arrangement 10 through the delivery roller 16, 17.
  • the roving 11 is further transported in transport direction D towards a rotating spindle 12 and wound up by a flyer 14 onto a bobbin 13 arranged on the rotating spindle 12.
  • the rotating flyer 14 applies a protective twist to the roving 11.
  • two roving production positions 6 share a common pivoted weighting arm carrying top rollers which are pressed against bottom rollers of the drafting arrangement 10.
  • the roving frame 1 further comprises a measurement set-up 19 which is part of a individual roving production position online monitoring system 3.
  • the measurement set-up 19 comprises a measurement unit 4 on each roving production position 6 for measuring at least one quality parameter and/or production parameter.
  • the measurement units 4 are arranged on a mounting rod 15 which extends across the roving production positions 6 between the delivery rollers 16, 17 of the drafting arrangements 10 and the flyers 14.
  • the measurement units 4 are connected to a central computer arrangement 2 via communication lines 5 for collecting and/or evaluating measuring results of the measurement units 4.
  • Figures 3 to 8 show different embodiments of measurement units 4, 41, 51, 61, 71.
  • the measurement units 4, 41 according to figure 3 and 4 in each case contain an optical sensor 31, 49.
  • the optical sensor 31 comprises a signal source 32 and a signal detector 33 which are arranged opposite to each other. Between the signal source 32 and the signal detector 33 a measurement area 30 is established through which the roving 11 is transported. Accordingly, the roving 11 is guided between the signal source 32 and the signal detector 33 through the measurement unit 4, that is to say through the measurement area 30.
  • the measurement unit 4 further comprises a first and second support structure 35, 36, each forming a contact surface 38 for supporting the roving 11 from below.
  • the first and second support structure 35, 36 are distanced to each other in transport direction D of the roving 11.
  • the measurement area 30 is established in the region of the roving path arranged between the first and second support structure 35, 36. Thus the passage 37 is located underneath the measurement area 30.
  • an optical measuring beam is send from the sensor source 32 towards the sensor detector 33 across the transport direction D of the roving 11 and in particular across the alignment of the roving 11, that is to say across the roving path. Accordingly, the optical signal path 34 runs across the transport path of the roving 11.
  • a quality and/or production parameter can be measured.
  • first and second support structure 35, 36 in each case form a trough-shaped contact surface against which the roving 11 lie.
  • the measurement unit 4 is designed as a module, that is to say as an assembly unit, which is fastened on a holding member of the roving frame 1, in present case a mounting rod 15, via connection interfaces.
  • the measurement unit 4 further comprises a visual indicator 80.
  • the visual indicator 80 is a signal lamp for optical indication of a deviation of a measured quality and/or production parameter from a reference value.
  • Figure 4 shows several measurement units 4 as shown in figure 3 arranged in roving production positions of a roving frame 1 downstream of the delivery rollers of the drafting arrangement 10 and upstream of the flyer.
  • the measurement units 4 are arranged next to each other and mounted on a mounting member 15 of the roving frame 1. After passing the measurement units 4 the roving is guided through an intake member 20 into a leg of a flyer 14 and led towards to the winding position on the surface of the bobbin 13 (not shown).
  • the measurement unit 41 as shown in figure 5 contains an optical sensor 49 with a signal source 42 and a signal detector 43 which are arranged on the same side as viewed in transport direction of the roving 11. I.e. the sensor 49 is arranged laterally of the passing roving 11, that is to say the roving path, as viewed in transport direction D.
  • a measurement area 40 is established through which the roving 11 is transported, that is to say the roving path leads through the measurement area.
  • the measurement unit 41 further comprises a first and second support structure 45, 46, each forming a contact surface 48 for supporting the roving 11 from below.
  • the first and second support structure 45, 46 are distanced to each other in transport direction D of the roving 11.
  • the measurement area 40 is established in the region of a roving path section arranged between the first and second support structure 45, 46. Thus the passage 47 is located underneath the measurement area 40.
  • an optical measuring beam is send from the sensor source 42 across the transportation direction D of the roving 11 towards the roving 11.
  • the optical measuring beam is at least partly reflected at the surface of the roving 11 towards the sensor detector 43 arranged at the same side as the sensor source 42.
  • the optical signal path 44 runs from the sensor source 42 towards the roving 11 and back towards the sensor detector 43.
  • a quality and/or production parameter can be measured.
  • first and second support structure 45, 46 in each case form a trough-shaped contact surface against which the roving 11 lies.
  • the measurement unit 41 is designed as a module, that is to say as an assembly unit, which is fastened on a holding member of the roving frame 1, in present case a mounting rod 15, via connection interfaces.
  • the measurement unit 41 further comprises a visual indicator 80.
  • the visual indicator 80 is a signal lamp for optical indication of a deviation of a measured quality and/or production parameter from a reference value.
  • Figure 6 shows a measurement unit 51 with a capacitance sensor 59 having a first and a second electrode 52, 53 which are distanced to each other for measuring at least one quality and/or production parameter.
  • the roving 11 is guided through the space between the two electrodes 52, 53 of the capacitance sensor 51.
  • the roving 11 changes the dielectric property therebetween.
  • the changing dielectric properties are used to derive at least one quality and/or production parameter of the roving 11.
  • Figure 7 and 8 show a measurement unit 61, 71 with a mechanical sensor 69, 79 each comprising a deflectable lever 62, 72 for measuring at least one quality and/or production parameter.
  • the roving 11 is guided below the lever 62 an across the lever 62 along the transport direction D and exerts a pressure onto the lever 63 from below.
  • the roving 11 is guided above the lever 72 along the transport direction D and exerts a pressure onto the lever 72 from above.
  • the levers 62, 72 are biased, e.g. spring-loaded, so that the lever 62, 72 always maintain a press on contact to the passing roving 11.
  • the measurement units 4 in each case comprise a sensor data processing unit 81 which processes the sensor raw data of the at least one sensor of the measurement unit 4.
  • a roving frame computer arrangement 82 is provided which collects all the processed sensor data from the measurement units 4 of a single roving frame 1.
  • a superordinate computer arrangement 84 which is located outside the roving frames 1 or on one of the several roving frames 1 collects the processed sensor data from all the roving frame computer arrangements 82.
  • the superordinate computer arrangement 84 transmits the processed sensor data to a central computer arrangement 2 which is located outside the roving frames 1, e.g. in a computer or quality and production control room.
  • the data transmission between the roving frame computer arrangements 82 and the superordinate computer arrangement 84 in particular is wireless.
  • the data transmission between the superordinate computer arrangement 84 and the central computer arrangement 2 in particular is wireless.
  • the central computer arrangement 2 is configured to further evaluate and display the processed sensor data or other information derived thereof on a display unit 83, e.g. in the form of graphical representations.
  • the central computer arrangement 2 comprises a monitoring unit (not shown) and a display unit 83, such as a screen.
  • the measurement units 4 in each case comprise a sensor data processing unit 81 which processes the sensor raw data of the at least one sensor of the measurement unit 4.
  • a roving frame computer arrangement 82 is provided which collects the processed sensor data from the measurement units 4.
  • a display unit 83 is provided at the roving frame 1, e.g. at its head end, for displaying the processed sensor data or other information derived thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP19175743.4A 2019-03-13 2019-05-21 Roving-rahmen mit einem überwachungssystem Pending EP3708700A1 (de)

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Cited By (2)

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EP3757262A1 (de) * 2019-06-19 2020-12-30 Maschinenfabrik Rieter AG Verfahren zur optischen überwachung einer textilmaschine, sowie eine überwachungseinrichtung und ein computerprogramm
EP4190955A1 (de) * 2021-12-01 2023-06-07 Maschinenfabrik Rieter AG Verfahren zum betreiben einer textilmaschine sowie system zum durchführen des verfahrens

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
EP4015683B1 (de) 2020-12-18 2023-09-13 Saurer Intelligent Technology AG Verfahren zur überwachung des spinnvorgangs an einer spinnvorrichtung, spinnstelle einer luftspinnmaschine sowie spinnvorrichtung
CN114045582A (zh) * 2022-01-11 2022-02-15 南通大学 一种用于批量卷绕纱线的模块化纺织系统
CN117265720B (zh) * 2023-11-22 2024-02-09 湘潭东信棉业有限公司 环锭细纱机智能控制系统及方法

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JPH06101125A (ja) * 1992-09-17 1994-04-12 Toyota Autom Loom Works Ltd 粗紡機における粗糸張力制御装置
WO2007010325A1 (en) * 2005-07-22 2007-01-25 Premier Evolvics Pvt. Ltd. Detecting foreign substances in a textile material
EP2309042A2 (de) * 2009-10-07 2011-04-13 Murata Machinery, Ltd. Spinnanlage
CN205420658U (zh) 2015-12-03 2016-08-03 江南大学 一种粗纱机粗纱均匀度在线检测装置
US20170101287A1 (en) * 2014-05-26 2017-04-13 Maschinenfabrik Rieter Ag Method for Operating a Textile Machine, and Textile Machine for Producing Rovings
EP3293595A1 (de) * 2016-09-13 2018-03-14 Premier Evolvics PVT. Ltd. Integriertes system und verfahren zur online-überwachung und offline-prüfung in einer textilen einheit

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JPH06101125A (ja) * 1992-09-17 1994-04-12 Toyota Autom Loom Works Ltd 粗紡機における粗糸張力制御装置
WO2007010325A1 (en) * 2005-07-22 2007-01-25 Premier Evolvics Pvt. Ltd. Detecting foreign substances in a textile material
EP2309042A2 (de) * 2009-10-07 2011-04-13 Murata Machinery, Ltd. Spinnanlage
US20170101287A1 (en) * 2014-05-26 2017-04-13 Maschinenfabrik Rieter Ag Method for Operating a Textile Machine, and Textile Machine for Producing Rovings
CN205420658U (zh) 2015-12-03 2016-08-03 江南大学 一种粗纱机粗纱均匀度在线检测装置
EP3293595A1 (de) * 2016-09-13 2018-03-14 Premier Evolvics PVT. Ltd. Integriertes system und verfahren zur online-überwachung und offline-prüfung in einer textilen einheit

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EP3757262A1 (de) * 2019-06-19 2020-12-30 Maschinenfabrik Rieter AG Verfahren zur optischen überwachung einer textilmaschine, sowie eine überwachungseinrichtung und ein computerprogramm
EP4190955A1 (de) * 2021-12-01 2023-06-07 Maschinenfabrik Rieter AG Verfahren zum betreiben einer textilmaschine sowie system zum durchführen des verfahrens

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