EP3230501B1 - Verfahren und vorrichtung zum beschicken einer anlage mit fasern - Google Patents

Verfahren und vorrichtung zum beschicken einer anlage mit fasern Download PDF

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Publication number
EP3230501B1
EP3230501B1 EP15783955.6A EP15783955A EP3230501B1 EP 3230501 B1 EP3230501 B1 EP 3230501B1 EP 15783955 A EP15783955 A EP 15783955A EP 3230501 B1 EP3230501 B1 EP 3230501B1
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EP
European Patent Office
Prior art keywords
signal
fibre
installation
controller
fibres
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EP15783955.6A
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German (de)
English (en)
French (fr)
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EP3230501A1 (de
Inventor
Frank WACKERZAPP
Reinhard Hartung
Christian Freitag
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Truetzschler Group SE
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Truetzschler Group SE
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Publication of EP3230501A1 publication Critical patent/EP3230501A1/de
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/02—Hoppers; Delivery shoots
    • D01G23/04—Hoppers; Delivery shoots with means for controlling the feed
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/02—Hoppers; Delivery shoots
    • D01G23/04—Hoppers; Delivery shoots with means for controlling the feed
    • D01G23/045—Hoppers; Delivery shoots with means for controlling the feed by successive weighing; Weighing hoppers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/06—Arrangements in which a machine or apparatus is regulated in response to changes in the volume or weight of fibres fed, e.g. piano motions
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/08—Air draught or like pneumatic arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/14—Constructional features of carding elements, e.g. for facilitating attachment of card clothing
    • D01G15/24—Flats or like members
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
    • D01G31/006—On-line measurement and recording of process and product parameters

Definitions

  • the invention relates to a method and a device for feeding a plant with fibers, to which fiber tufts are fed, these are at least partially broken up and fed to a pneumatic feeding plant by means of a feeding device, which feeds the fibers into the storage of at least one fiber-processing machine, in particular a card, card, Opener or cleaner, conducts.
  • a feeding device which feeds the fibers into the storage of at least one fiber-processing machine, in particular a card, card, Opener or cleaner, conducts.
  • the material flow within blowroom plants or spinning preparation plants is guaranteed by mechanical, electrical and pneumatic equipment.
  • the density and height of the filling can be determined via a selected target pressure.
  • the uniformity of the filling i.e. compliance with the target pressure, determines the uniformity of the material supply. As a result, compliance with the production and quality of the product is influenced.
  • the classic solution is based on manually setting up a control or regulator on the material-conveying machine in order to achieve sufficient and constant filling of the following machine.
  • Knowledge of the desired production, the basic material properties and the expected drive values are a prerequisite for the set-up operation. These steps and knowledge are necessary with every change of production or starting material. In addition, due to fluctuations in the material properties, it may be necessary make ongoing corrections at production time.
  • the uniformity of the filling is essentially determined by the suitable, manual selection of the operating point, ie the control and regulation parameters.
  • Variations in the material and/or the material properties lead to fluctuations in the operating point of the material-feeding machine and thus to fluctuations in the filling the following machine. Fluctuations in the filling can lead to fluctuations in the quality of the product or production failures. Based on existing solutions, these fluctuations in the operating point of a machine or machine sequence can only be corrected by continuous manual intervention in the setting values.
  • a pressure gauge is installed in a pneumatic feed and distribution line upstream of the card, which transmits the differential pressure as an electrical signal to a controller.
  • the differential pressure over time is used via a control device in order to generate a corrected actual pressure value, with which a drive of a flake conveyor is regulated.
  • the disadvantage of this method is that the control or regulation of the material-conveying machine has to be set manually in order to achieve sufficient and constant filling of the downstream machine, for example a card.
  • the cleaning unit includes at least one separating element above a transport roller. Dirt removal includes means to remove excreted material from the area of the roller.
  • the WO 2014/001867 A1 discloses an apparatus and method for controlling fiber feed to a carding machine having a hopper.
  • the filling chute is divided into an upper chute and a lower chute, fiber tufts being fed into the upper chute and transported into the lower chute by a feeding device (19).
  • the fiber tufts are compacted in the lower chute under a specific pressure to form a batting with a specific batting weight.
  • a target value for the lap weight is specified, to which a pressure for the lower chute is assigned.
  • an actual value of the wadding weight is determined and a correction of the target value for the pressure is carried out on the basis of a target/actual value comparison of the wadding weight.
  • a card with a regulated drafting system at the outlet is known. Measured values for regulating the drafting system are obtained from the drafted sliver.
  • the sliver coiler can be pre-controlled relative to the drafting system in order to limit the stress on the sliver between the drafting system and the sliver coiler.
  • a sensor can be arranged between the card and the autoleveler and the base speed of the drive for the autoleveler can be changed based on the signal from the sensor.
  • the DE 2 352 37 4 A discloses a method of processing fluffy fibers into a fibrous web of substantially uniform density.
  • a loose fiber mass is guided from one side against a moving perforated or permeable surface.
  • a suction air flow is directed from the aforesaid one side to the other side of the permeable surface through that surface to bring portions of the fiber mass into abutment with the surface for transport by the moving surface.
  • the amount of air drawn through the moving surface per unit time is varied in response to perceived changes in negative pressure on the other side of the surface caused by changes in the density of the fibrous mass brought into contact with the surface, to compensate for these changes so that the moving surface carries in its direction of movement uniform amounts of fibers from which a fibrous web of substantially uniform density is formed.
  • the EP 0 253 471 A1 discloses a system and method for controlling a weight of a web.
  • the current weight of fibers fed to a carding machine is measured in a resting state in a weighing pan.
  • a feed roller is controlled by a computer to deliver a preset fiber weight to the weigh pan.
  • the weighed fibers are fed to a belt feed and pneumatic feeding system.
  • the feeding of weighed fibers using a belt can be adjusted by adjusting the speed of a belt feed roller. This maintains a predetermined amount or level of fibers in a tuft feeder.
  • Pressure sensed by a pressure transducer is used to indicate the amount of fiber in the tuft feeder.
  • a print signal is fed to a computer to drive a delivery roller.
  • a card feed roller, the fibers in the form of a batting from the tuft feeder of the carding machine is controlled by the computer synchronously with the speed of the carding machine, as sensed by a doffer.
  • a preset lap weight signal is compared to an actual weight signal representing the actual weight of fiber fed to the weigh pan. Any difference between the preset lap weight and the actual fiber weight is compensated for by adjusting the operation of the card feed roller.
  • the adjustment of the fiber feed roller is performed to adjust the weight of fibers fed to the tray and to maintain the feeding of the preset weight of fibers.
  • adjustment of the fiber feed roll can be made to maintain the amount of fiber in the tuft feeder as the feed roll can vary.
  • the fiber feed roll, the fiber feed roll and the card feed roll are operated at predetermined ratios in synchronization with the speed of the carding machine.
  • the method for feeding a plant with fibers comprises the fiber tufts fed, these are at least partially broken up and fed by means of a feeding device to a pneumatic feeding plant which feeds the fibers into the storage of at least one fiber-processing machine, in particular a card, card, opener or cleaner, directs a control loop into which the actual pressure values, which are measured and processed in the pneumatic loading system, flow, and into which the mass flow of the processed fibers, which is fed to at least one fiber processing Machine measured and further processed, the control loop determining the optimal working point of the spinning preparation system by means of a control algorithm and a signal is sent to an actuator of the feed device to control the amount of fiber tufts.
  • the actual pressure values are converted into a corrected actual pressure value by differentiation over time. Any resulting difference flows into the control loop with a predetermined pressure setpoint.
  • control circuit continuously determines the output quantity of the tuft feeding machine depending on the target and actual production of the fiber processing machine. Variations in the material or material properties, production fluctuations and other disruptive factors (e.g. the shutdown of individual machines) are automatically compensated for by the control circuit.
  • the signal for controlling the feed device is fed back into the control loop and runs through the control algorithm there again. Due to the feedback of at least one signal for a manipulated variable, the control loop continuously adapts to the optimal operating point and “learns" the production and the effects of changes due to variations in the material properties. In addition, the non-deterministic linearity deviations of the material-conveying machine are processed and compensated for in the control loop. This always takes place without manual intervention and automatically leads to compliance with the target specifications and constant filling of the following machine.
  • the stored control algorithm for starting up the spinning preparation plant assumes a constant mass flow of supplied fiber tufts. This results in one suitable, automated starting value estimation, which also reduces the initial learning phase to a minimum.
  • the operating point of a machine or plant for fiber processing is continuously and automatically determined by the control algorithm that adapts to the working conditions.
  • a feed device which feeds the fibers into the storage of at least one fiber-processing machine, in particular a card, roller card, Opener or cleaner, conducts.
  • the invention is such that by means of at least one controller, which is part of a control loop, into which the actual pressure values that are measured and processed in the pneumatic feed system flow, and into which the mass flow of the processed fibers, which is measured on at least one fiber processing machine and further processed, the optimal operating point of the system is determined by means of a control algorithm and a signal is sent to an actuator of the feed device for controlling the quantity of fiber tufts.
  • the actual pressure values, which are measured in the pneumatic charging system are converted into a corrected actual pressure value by differentiation over time and compared with a pressure setpoint value in another controller. The resulting difference flows into the control loop as a signal.
  • control loop is formed by at least two controllers X1 and X2, but also optionally by a total of three controllers X1, X2 and X3, which have different functions. Controllers X1 and X3 are functionally separate from controller X2, since there is no feedback from controller X2 to controllers X1 and X3.
  • the controller X2 From the signals for the mass flow of the further processed fibers and from the processed pressure signal from the pneumatic loading system, the controller X2 continuously determines the discharge quantity of the tuft-feeding machine and controls the associated actuator via the signal z, with which the drive for the fiber feed and thus for the mass flow supplied is regulated. Because the signal z is fed back into the controller X2 and runs through the control algorithm there again, the control loop is optimized without manual intervention.
  • the fiber material F is fed from a bale opener, not shown, to a cleaner 1 via a mixer, not shown.
  • a cleaner 1 the opened and cleaned fibers or fiber flocks are conveyed pneumatically via a pipe 2, a dedusting machine 3, a fan 4 into a pneumatic feed and distribution line 5, to which a flake feeder 6 with at least one card 7 is connected.
  • the flake feeder 6 has an upper reserve chute 6a and a lower feed chute 6b, between which a flake conveying device in the form of a slow-running draw-in roller 6c and a fast-running opening roller 6d can be arranged.
  • the draw-in roller 6c can, for example, work together with a draw-in trough, not shown, across the width of the tuft feeder 6 .
  • the intake trough can be assigned an inductive displacement transducer, which is connected to a controller via a computer. As a result, changes in the mass of the conveyed fiber material are recorded and converted into electrical signals.
  • a sliver funnel (not shown) or an alternative device can be arranged at the output of each card 7, which can be followed, for example, by two draw-off rollers.
  • the sliver funnel or the alternative device has a sensor 14 with which the amount of fiber produced can be determined and which forwards the corresponding signals for the mass flow ⁇ 1 to the controllers X1 and X2.
  • the fiber quantity produced i.e. the mass flow ⁇ 1
  • the fiber quantity produced can be determined via the sliver thickness as a function of the sliver speed.
  • the signal for the mass flow ⁇ 1 goes into the card control, which forwards this value or an associated signal to the controllers X1 and X2.
  • a pressure sensor 8 is mounted in a wall of the supply and distribution line 5 and is connected to a transducer 9 .
  • the measured actual pressure values p1 are converted into electrical signals x and entered into a controller 10, for example a computer.
  • An electrical signal y for a corrected actual pressure value is generated in the controller 10 by differentiating the differential pressure over time. This signal y with the corrected actual pressure value is fed back to an electronic controller X3.
  • a desired pressure value can be entered as a reference variable in the controller 10 and in the controller X3.
  • the difference between the command variable and the controlled variable is sent to the controller X2 as a signal v.
  • control circuit determines the feed speed and thus the mass flow ⁇ 2 of fibers fed into the cleaner.
  • the invention provides at least two controllers X1 and X2 so that the control circuit always finds the optimal operating point for the spinning preparation system without manual readjustment of fiber qualities or material fluctuations when removing the fiber bales, with controller X1 being functionally separate from controller X2, since there is no feedback from the controller X2 to X1 takes place.
  • the controller X1 queries the target production via the card control and compares it with the current actual production. The control deviation between the target production and the actual production is received as a signal u in the controller X2.
  • the controller X2 can be designed as a PI controller which, assuming minor fluctuations, assumes a known mass flow ⁇ 2 of fibers F and uses a computer to determine the optimal value for card production based on the current card production ⁇ 1.
  • the controller X2 therefore assumes a constant fiber feed ⁇ 2 (start value estimation), which can actually be subject to wide fluctuations, in order to determine the optimum operating point for the current card production with a mass flow ⁇ 1.
  • start value estimation the system can be accelerated to the actual optimum working point.
  • the optimal (saved) operating point from the last operation of the system serves as the starting value for the constant fiber feed.
  • the control loop reaches an approximation to the optimal working point of the cards 7 in the shortest possible time
  • controller X2 continues to process signal v for the difference between the command variable and the controlled variable from controller X3.
  • the current card production ⁇ 1 minus the disturbance variable S1 for the variable degree of purification in the controller X2 is processed as a further value.
  • the controller X2 continuously determines the discharge quantity of the tuft feeding machine with the mass flow ⁇ 2.
  • the associated signal z regulates the actuator drive 20 for the conveyor belt and the draw-in rollers 1a, 1b, as a result of which the quantity of fibers F can increase or decrease.
  • the speed for the actuator drive 20 can be limited via the input device 13 in order to limit the maximum impact production for technological reasons.
  • the signal z for controlling the actuator drive 20 is fed back into the controller X2, where it is compared indirectly with the signal u and optimized taking into account the other signals v and ⁇ 1.
  • the signal z is processed together with the signal from the current fiber or mass flow ⁇ 1 and the resulting result is processed with the result from the signals ⁇ 1, u and v processed together to form a new value or signal z.
  • the sequence of the signals processed together in controller X2 is an essential basis for the control algorithm.
  • the feedback of the signal z that has already been evaluated ensures that the control algorithm is run through again with a new value for the signal z, as a result of which a differentiating behavior arises.
  • the spinning preparation plant can work very continuously without fluctuations.
  • the feedback of the signal z ensures a quick adjustment to the current optimal operating point, whereby the control loop optimizes itself and can therefore be described as "self-learning".
  • a further improvement can be achieved by feeding an upcoming can change or a card stop or a renewed start-up of the card as a signal w into the controller X2 from the card controller(s) in order to take into account an upcoming production fluctuation that is caused by more or fewer fibers with possibly a change in pressure in the supply and distribution line 5 makes itself felt.
  • the supply and distribution line 5 becomes longer with the number of cards 7, as a result of which the material running times increase and the pressure in the supply and distribution line 5 is therefore subject to greater fluctuations.
  • the material running time can be determined as signal t in the controller 10 and entered into the controller X2. This makes it possible to predict pressure fluctuations due to the gradient of the pressure curve over the material running time and to compensate for them via the fan or fans 4 and/or the actuator drive 20 .
  • control circuit can also be used for any other fiber processing machine or system, such as web-forming machines or for spinning preparation systems for filling fiber stores.
  • the algorithm for the control loop is designed in such a way that variations in the material or material properties, as well as production fluctuations and other disruptive factors such as the switching off of individual machines are automatically compensated for by the control loop by feedback of at least one signal (controller X2).
  • the control circuit continuously adapts to the optimal working point and “learns" the production and the effects of changes due to variations in the material properties.
  • the non-deterministic linearity deviations of the material-conveying machine are learned and compensated for.
  • the "learning process" of the control circuit always takes place without manual intervention and automatically leads to compliance with the optimum operating point for the cards and constant filling of the feed chutes.
  • the run-up phase is reduced to a minimum by means of a suitable, automated start value estimation (controller X2).
  • control circuit can also process other disturbance variables such as the degree of contamination of the fiber tufts, sliver breakage on the cards or fluctuating moisture content of the fiber tufts.
  • the controllers X1, X2 and X3 are preferably housed in a common assembly and do not need to be designed as separate components.
  • the graphics in the Figures 2 to 4 show the time in seconds on the abscissa.
  • the left ordinate shows the pressure in pascals in the feed and distribution line 5, at the same time the speed in % and the production in kg/h.
  • the right ordinate indicates an abstract dimensionless rule value.
  • figure 2 shows a classic solution according to the state of the art, in which a controller with manual operating point and fixed control calculation is used.
  • the target speed of the conveyor belt and the feed rollers 1a, 1b, the target production and the control value calculation are specified manually. Fluctuations in the material properties during constant production can only be compensated for by manually adjusting the operating point.
  • the first learning phase is figure 3 shown, in which the target production is automatically optimized and ramped up in stages, since the cards are gradually switched on.
  • the actual pressure in the supply and distribution line 5 drops and approaches the target pressure after about 220 seconds.
  • the actual production will match the target production after approx. 300 seconds congruent.
  • the actual speed of the drive for the conveyor belt or for the draw-in rollers 1a, 1b also gradually increases.
  • a subsequent start-up of the system is even shorter, since the last optimal working point is stored in the controller X2 and serves as the starting level for the start-up.
  • figure 4 shows the continuous adjustment of the optimum operating point. Fluctuations in the material properties with constant production (see left part of the diagram) are compensated with the help of the "learning function" (feedback of at least one signal). In the middle and on the right-hand side of the diagram, there are production fluctuations that are balanced out in the same way, with the actual production being just below the target production. Due to the feedback of at least one signal in the control loop, all adjustments can be compensated for automatically, without manual intervention and without fluctuations in the filling or production downtime. The optimum operating point decreases slightly and finds its optimum when, after short fluctuations, the actual pressure has approached the target pressure. A stop in the delivery of the feeding machine and thus a significant fluctuation in the filling of the following machine can be completely prevented and thus a uniform density and height in the filling, for example of the card shafts, can be achieved.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP15783955.6A 2014-12-13 2015-10-09 Verfahren und vorrichtung zum beschicken einer anlage mit fasern Active EP3230501B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014018655 2014-12-13
DE102015106415.4A DE102015106415A1 (de) 2014-12-13 2015-04-27 Verfahren und Vorrichtung zum Beschicken einer Anlage mit Fasern
PCT/EP2015/002000 WO2016091340A1 (de) 2014-12-13 2015-10-09 Verfahren und vorrichtung zum beschicken einer anlage mit fasern

Publications (2)

Publication Number Publication Date
EP3230501A1 EP3230501A1 (de) 2017-10-18
EP3230501B1 true EP3230501B1 (de) 2022-03-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15783955.6A Active EP3230501B1 (de) 2014-12-13 2015-10-09 Verfahren und vorrichtung zum beschicken einer anlage mit fasern

Country Status (6)

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US (1) US20170342603A1 (zh)
EP (1) EP3230501B1 (zh)
CN (1) CN107002309B (zh)
BR (1) BR112017011396B8 (zh)
DE (1) DE102015106415A1 (zh)
WO (1) WO2016091340A1 (zh)

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ITUB20160392A1 (it) * 2016-01-26 2017-07-26 Saldarini 1882 S R L Metodo di riempimento di un capo di abbigliamento imbottito e giubbotto imbottito
CN106637539B (zh) * 2016-12-20 2018-10-23 绍兴柯桥南红纱业有限公司 多纤维混棉工艺
CH714101A1 (de) * 2017-08-30 2019-03-15 Rieter Ag Maschf Vorrichtung zur Regelung eines Faserflockenstromes in einem Reiniger.
CH715076A1 (de) * 2018-06-07 2019-12-13 Rieter Ag Maschf Füllstandsmessung eines Faserflockenspeichers.
CH715422A1 (de) 2018-10-02 2020-04-15 Rieter Ag Maschf Faservorbereitung mit einer Abfolge von Maschinen.
CN109554783A (zh) * 2018-12-27 2019-04-02 扬州好爱玩具礼品有限公司 一种通过自动化设备来控制储存pp棉的工艺
DE102019115138B3 (de) * 2019-06-05 2020-12-10 TRüTZSCHLER GMBH & CO. KG Karde, Vliesleitelement, Spinnereivorbereitungsanlage und Verfahren zur Erfassung von störenden Partikeln
WO2022233773A1 (de) * 2021-05-04 2022-11-10 Hubert Hergeth Materialvorlage

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US3142348A (en) * 1961-06-14 1964-07-28 Fiber Controls Corp Fiber feeding apparatus
US3903570A (en) * 1972-10-20 1975-09-09 Iii Daniel G Rowe Apparatus for forming a lap of textile fiber
DE2658044C3 (de) * 1976-12-22 1980-02-21 Truetzschler Gmbh & Co Kg, 4050 Moenchengladbach Verfahren und Vorrichtung zum Erzeugen eines gleichmäßigen Faserbandes
IN158614B (zh) * 1982-04-01 1986-12-27 Truetzschler & Co
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IN171722B (zh) * 1987-10-08 1992-12-19 Rieter Ag Maschf
US6581248B1 (en) * 1997-01-23 2003-06-24 Maschinenfabrik Rieter Ag Carding machine with drawing rollers at the outlet
EP0954625A1 (de) * 1997-01-23 1999-11-10 Maschinenfabrik Rieter Ag Karde mit streckwerk am auslauf
EP0894878A3 (de) * 1997-07-30 2000-04-19 Maschinenfabrik Rieter Ag Flockenreiniger
DE10064655B4 (de) * 2000-12-22 2012-01-26 TRüTZSCHLER GMBH & CO. KG Vorrichtung zur Regelung der mindestens einer Karde zuzuführenden Faserflockenmenge
CH706658A1 (de) * 2012-06-29 2013-12-31 Rieter Ag Maschf Verfahren und Vorrichtung zur Regelung der Faserzufuhr zu einer Karde.

Also Published As

Publication number Publication date
BR112017011396B1 (pt) 2022-01-25
BR112017011396A2 (pt) 2018-02-20
US20170342603A1 (en) 2017-11-30
BR112017011396B8 (pt) 2022-07-05
DE102015106415A1 (de) 2016-06-16
CN107002309A (zh) 2017-08-01
WO2016091340A1 (de) 2016-06-16
EP3230501A1 (de) 2017-10-18
CN107002309B (zh) 2020-04-03

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