EP0311831B1 - Regelung von Verarbeitungsstufen einer faserverarbeitenden Anlage - Google Patents

Regelung von Verarbeitungsstufen einer faserverarbeitenden Anlage Download PDF

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Publication number
EP0311831B1
EP0311831B1 EP88115802A EP88115802A EP0311831B1 EP 0311831 B1 EP0311831 B1 EP 0311831B1 EP 88115802 A EP88115802 A EP 88115802A EP 88115802 A EP88115802 A EP 88115802A EP 0311831 B1 EP0311831 B1 EP 0311831B1
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EP
European Patent Office
Prior art keywords
stage
control
feed
production
fibre
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.)
Expired - Lifetime
Application number
EP88115802A
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German (de)
English (en)
French (fr)
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EP0311831A1 (de
Inventor
Walter Schlepfer
Christof Staeheli
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0311831A1 publication Critical patent/EP0311831A1/de
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing

Definitions

  • This invention relates to a control for processing stages in a fiber processing plant.
  • the plant is part of a spinning mill for the production of staple fiber yarns, but the invention is not limited to this application.
  • bale removal unit runs in the so-called stop / go mode and the removal depth or the driving speed of the unit is controllable in order to maintain an "optimal" ratio of running time / breastfeeding as continuously as possible. Switching the bale removal on and off is carried out on the basis of control signals which are obtained from the next processing stage.
  • control signals for bale removal from a processing stage at the end of the blowroom line (e.g. from the card) (DE-A-3513295).
  • the control signals are used to control the driving speed of the removal unit. If a discontinuous (stop / go) operating mode is provided, the runtime / lactation ratio should also be "optimized" here (col. 3, lines 31 to 38 of DE-A-3513295)).
  • the present invention cannot completely rule out changes in fiber processing, but can significantly reduce them, and is in any case designed in such a way that changes in fiber processing are normally only required within narrowly defined limits.
  • the invention provides a fiber processing installation which consists of a plurality of fiber processing stages, fibers to be processed being conveyed in sequence from stage to stage and at least one stage running in stop / go mode, while a stage downstream of it is a predetermined product (e.g. a sliver) continuously delivers.
  • a predetermined product e.g. a sliver
  • a carding stage could comprise between 6 and 20 individual machines.
  • the delivered product (or the output) of a stage then comprises the production of all machines currently running in this stage.
  • the invention also provides for the determination of a target value for the ratio of runtime / lactation in said (upstream) stage, which is to run in stop / go mode.
  • Monitoring means are also available to monitor the actual runtime / lactation ratio of this stage and to compare it with the predefined setpoint. In the event of a deviation of the actual ratio from the target ratio, the production of this stage, which remains constant during normal operation during the running time, can either be increased or decreased in order to adjust the actual ratio mentioned to the target ratio.
  • the present invention is characterized in that the setpoint is not fixed (as suggested in EP-B-93235), but can be changed as a function of the production of the downstream stage (which is continuously producing in normal operation).
  • the system can be designed in such a way that a change in the output of the output stage is immediately reflected in a corresponding change in the target ratio of runtime / lactation in each upstream, discontinuous stage, the "corresponding change" can be determined individually for each upstream stage.
  • the named function can be determined in such a way that the target ratio assumes a theoretically optimal value (e.g. 90:10 - see EP-B-93235) when the downstream stage is fully produced. The target ratio can then be reduced linearly depending on the reduction in the production of the downstream stage.
  • the optimal adjustment function for a particular plant can be determined empirically and entered into the system, and where adjustment to multiple levels occurs, the adjustment function can vary from level to level.
  • the actual running time / lactation ratio can be monitored in accordance with the principles described in EP-B-93235, and in the case of bale removal as an upstream stage, the change in production can also be carried out as described in this European patent specification, i.e. by changing the removal depth or the driving speed of the removal unit.
  • the invention can thus be easily integrated into existing systems, in which feedback circuits are provided between stages in order to regulate the ratio of runtime / lactation time of the upstream stage in accordance with predetermined conditions in the downstream stage (e.g. filling level in a memory).
  • the system is preferably controlled by a computer which monitors the production of the downstream stage and determines the target ratio for the upstream stage (s) accordingly. Control loops between upstream stages can also can be realized via the computer.
  • Fig. 1 This comprises a feed machine S, a fan V, a feed channel K, two cards C1 and C2, each with a filling shaft (not indicated), a microprocessor control ⁇ P and a controllable drive A for the feed machine S.
  • a measuring device M is in the channel K between the Fan V and the first card C1 for measuring the static pressure built-in. It delivers an output signal to the microprocessor ⁇ P.
  • Each card C1 or C2 delivers a signal to the microprocessor ⁇ P to show whether this card is currently in operation or not.
  • the microprocessor control ⁇ P supplies a control signal to the operation A of the food processor S.
  • the fan drive not shown, cannot be controlled by the control ⁇ P. In operation, it runs at a constant speed n.
  • the control system should work together with the other elements in such a way that the filling chute of each card being produced remains “full” (within certain tolerances).
  • the static pressure in the channel K in the measuring device M can represent the filling ratios. If the measured static pressure is outside a range determined by the processor ⁇ P, the supply is switched on (when the pressure drops) or switched off (when the pressure rises). The supply therefore runs in the so-called stop / go operating mode.
  • the control ⁇ P only switches the feed drive A on and off, in this example it has no influence on the speed of the drive, ie on the current production of the feed machine.
  • This current production is predetermined for normal operation and kept constant, so that a constant quality (processing of the fibers) is achieved.
  • the set production must be sufficient for the greatest possible "demand” from the connected cards. Normally a certain "overproduction” is stopped, so that when all connected cards produce as quickly as possible, an efficient one
  • There is a relationship between the idle time and the running time of the food processor in stop / go mode e.g. 90% running time to 10% standing time.
  • the control method described is not restricted to a simple system with only two cards.
  • the current production of the feed machine S can be fixed or set during the installation of the system. However, if the number of cards allocated to a food machine can be changed, e.g. by actuating a release agent T (Fig. 1), a fixed production of the food machine S is not useful.
  • the production should be adapted to the number of cards allocated to the feed machine in order to enable an optimal ratio of runtime / breastfeeding time for each predefined allocation.
  • the line contains a separating means T, as indicated by dashed lines in FIG. 1, this separating means can also be connected to the control ⁇ P by a signal line, so that the control informs about the currently "effective structure" of the line becomes.
  • the separating agent T blocks the feed channel K between card C2 and a third card C3. If this release agent T is rendered ineffective, the card C3 can also be fed from the feed machine S via the channel K flakes.
  • the average production of the feed machine must correspond to the total production of the cards allocated to this feed machine.
  • the average production of the food machine depends on (a function of) the current production set and the ratio of running time to lactation.
  • the cards run "continuously", the overall production of the card is subject to fluctuations, e.g. can be provisionally turned off for any reason.
  • the ratio of the running time / downtime of the feed machine S is to be monitored, as was already proposed in EP-B-93235 for bale removal. Since the processor ⁇ P switches operation A on and off, the processor can run the runtime (or downtime) of the food processor without any problems Determine over a predetermined time interval what is equivalent to determining the runtime / lactation ratio for these intervals (or, if it is desired, to calculate the ratio yourself). This actual ratio is then compared with a target ratio and any deviations are determined. The current production of the feed machine is then adjusted (for example by changing the speed of the feed roller during its running time) in order to counter the deviation.
  • the target ratio is not fixed (as in EP-B-93235), but is calculated by the processor depending on the number of producing cards. Possibilities for such a determination will be described below in connection with FIGS. 3 to 5. For the time being, the principle is briefly summarized using the diagram in FIG. 2.
  • the box Z represents the final stage (carding machine) of the line which is supplied by the upstream stage X, so that a material flow Y (from X to Z) takes place. This material flow is switched on and off depending on consumption via the feedback R.
  • the ratio runtime / lactation of stage X is determined and delivered as a signal via line L to a comparison means VM.
  • a determining measure for the consumption is converted in stage Z into a signal representing a target ratio and is supplied via line 1 to the comparison means VM.
  • stage X evaluates the signal e so that a change in the current production of this stage takes place.
  • the necessary change will be small (fine adjustment), because stage Z requires less material via feedback R at this time.
  • the invention makes it easier to adapt stage X to the behavior of stage Z. The adjustment can thus be carried out relatively quickly because the system is no longer dependent on "leveling off” on an uncontrolled runtime / lactation ratio. However, it is also no longer tied to a "rigid"("optimized") ratio (as suggested in EP-B-93235), which means relatively large changes in fiber processing (with corresponding fluctuations in the quality of the end product).
  • the invention can also be used to control other upstream stages, as will now be explained in connection with the other figures.
  • the system shown schematically in Fig. 3 comprises 6 "stages" I to VI.
  • This system corresponds to the fiber processing line of the short-staple spinning mill that is common today, from bale removal (level I) to carding (VI).
  • the material (fibers or flakes) is conveyed pneumatically between the different stages, which is indicated by schematic pipelines (double arrows) in FIG. 3.
  • Level I can be a single "Unifloc” (Registered Trade Mark) and the Stage II included a “single roller cleaner” type cleaning machine.
  • Level III can be a single "Unimix” (Registered Trade Mark) and Stage IV include a "unit cleaning machine” (ERM) fine opener.
  • Stage V comprises an ERM machine, together with a transport fan, not shown, to form a flake feed unit.
  • the latter is used to feed flakes to a plurality of cards K, which together form stage VI, each card K being equipped with its own feed chute and the feed chutes being connected to a common feed duct extending from the stage V transport fan.
  • each card K runs continuously and delivers a continuous sliver (not shown).
  • the customers of the cards are connected via a line 10 (FIG. 2) to a master computer LR, so that the computer is informed whether each card is currently in operation or not.
  • a master computer LR monitoring the operating state of each individual card.
  • a pressure sensor 14 reacts to the static pressure in the feed channel and delivers a corresponding signal via line 12 to the computer LR.
  • the computer sends a corresponding signal to the flake feed unit FS in order to switch the flake feed on or off.
  • the supply unit is therefore connected to the computer LR by a line 16.
  • the flake feed unit also has a filling shaft, which material from the ERM machine in stage IV receives.
  • a level monitor (not shown) installed in this shaft is connected to the computer by a line 18 so that the latter can switch the delivery from the ERM machine on or off via line 20.
  • a similar level monitoring (not shown) of the ERM machine gives a signal via line 22 to the computer for controlling the delivery of the mixing machine UM via line 24.
  • the storage box of the mixing machine UM is also equipped with a level monitor (not shown) which emits a signal via line 26 to the computer LR. Accordingly, the computer sends signals via a line 28 to the traction motor (not shown) of the bale removal unit in order to switch the bale removal on or off.
  • stages I, III, IV and V run discontinuously (in stop / go mode) and that each of these upstream stages is connected to a downstream stage by a feedback circuit.
  • this control loop consists of the material flow MF itself, the level monitoring NU of the downstream stage, the signal connection with the host computer LR, the drive motor AM, the upstream stage and the signal connection between the computer and the drive motor.
  • Such control loops are of course well-known prior art.
  • the ratio runtime / lactation of at least one upstream stage, preferably stage I is to be monitored by the host computer LR and compared with a target value.
  • a signal from the drive motor AM (FIG. 5a) is sent to the computer via the line 30 and there is subjected to an AND operation (indicated schematically by an AND gate) with a clock signal from a clock generator TG, and the resultant result Signal is delivered to a counter Z.
  • the latter also receives the clock signal from the clock generator TG and uses the latter signal to define predetermined time periods T (FIG. 5B) of the same length.
  • the counter Z either sums up the time intervals t during which the drive motor AM is running or the smaller, intermediate pauses. From these values, the counter Z calculates an average value for the actual runtime / lactation ratio of the corresponding upstream stage.
  • the output signal of the counter Z which represents the actual ratio is supplied to a comparison device G and is compared there with a signal which represents a setpoint value.
  • a signal representing any deviations is converted by the computer LR into a corresponding control signal in order to change the effective production of the upstream machine accordingly.
  • the computer LR thereby controls the production of stage I (bale removal machine)
  • the desired production change can be carried out via one, the other or both of two setting options, namely by setting the removal depth or setting the driving speed of the unit.
  • Corresponding signals can be sent via line 28 (driving speed) to the drive motor of the overall unit and / or via line 328 to a height adjustment device (not shown) for the bale removal member of the unit (see EP-B-93235 and USA-A-4,660,257).
  • the signal representing the setpoint value which is supplied to the device G, must be generated by the master computer LR as a function of signals received via the line 10.
  • the setpoint is selected step by step depending on the number of cards currently running, it is not necessarily the absolute number that is important, but only the proportion of running cards compared to the maximum number. For example, if all cards are running, the setpoint for the runtime / idle time ratio of the bale removal machine can be set to 90:10. If only two thirds of the cards are running, the target ratio for the bale removal machine can be reduced to 60:40 - a linear adjustment of the ratio to the reduced number of running cards.
  • Each intermediate stage can also be monitored individually by the master computer LR.
  • FIG. 5b Possible changes are shown schematically in FIG. 5b.
  • the bale removal machine runs over a period T over five intervals t, which are drawn with full lines (such a regular run is of course for practice is highly unlikely, but only serves to explain the principle). If the production of one or more cards fails, the duration of each interval can be reduced in the given time period T ( ⁇ ), which was indicated by dashed, vertical lines.
  • the maximum production of the upstream stage must be increased (constantly over each time interval), in order to do so to comply with the newly set target ratio for the running time / lactation.
  • Such an increase is indicated by i between the first and second time period in FIG. 5b, the duration ⁇ of each interval in the second time period corresponding to the duration of the reduced intervals ⁇ (indicated by dashed lines) of the first time period.
  • the production of the first continuously running stage determines the target value for the ratio of running time / lactation time of at least one and preferably all upstream, discontinuously running stages. However, these are not necessarily all upstream stages.
  • the mono-roller cleaner (stage II in Fig. 3) runs continuously, although the two stages I and III run discontinuously. In this case, stage II plays no role in the "rule chain", which it simply skips by connecting the storage box - computer - bale opener.
  • the invention is not restricted to the use of a production signal from the card to control the upstream machines.
  • the production signal should be continuously available and should represent a reliable measure of the actual production of the line.
  • the first stage of the line that can meet these conditions is preferably chosen as the determining stage for the control of the upstream machines. In short-staple spinning, the conditions mentioned can usually only be met in the carding machine.
  • each individual card will be the same. To determine the current production of the card, it is then sufficient to tell the computer whether each individual card is running or not. If the production values for the individual cards are set individually, the computer must not only be informed whether a specific card is running, but also which production has currently been set for this card.
  • the circuit shown in FIG. 5a for monitoring the actual ratio of runtime to lactation is not essential. Alternative proposals have already been listed in EP-B-93235.
  • the optimal time period (T) for monitoring can be determined empirically and then preprogrammed.
  • plant in this context comprises a plurality of processing stages which have been linked together in a processing line by suitable fiber transport means and / or control devices.
  • the fibers to be processed run the stages in a predetermined order by.
  • the fiber transport means is preferably pneumatic, but not necessarily. In any case, the transport process runs automatically, ie without intervention by the operating personnel. It also normally runs continuously, ie this is not a batch transport.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Inorganic Fibers (AREA)
EP88115802A 1987-10-08 1988-09-26 Regelung von Verarbeitungsstufen einer faserverarbeitenden Anlage Expired - Lifetime EP0311831B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH394787 1987-10-08
CH394387 1987-10-08
CH3947/87 1987-10-08
CH3943/87 1987-10-08

Publications (2)

Publication Number Publication Date
EP0311831A1 EP0311831A1 (de) 1989-04-19
EP0311831B1 true EP0311831B1 (de) 1991-09-04

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ID=25694245

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EP88115802A Expired - Lifetime EP0311831B1 (de) 1987-10-08 1988-09-26 Regelung von Verarbeitungsstufen einer faserverarbeitenden Anlage

Country Status (7)

Country Link
US (1) US4876769A (enrdf_load_stackoverflow)
EP (1) EP0311831B1 (enrdf_load_stackoverflow)
JP (1) JPH01111023A (enrdf_load_stackoverflow)
CN (1) CN1020932C (enrdf_load_stackoverflow)
DE (1) DE3864647D1 (enrdf_load_stackoverflow)
ES (1) ES2026983T3 (enrdf_load_stackoverflow)
IN (1) IN171722B (enrdf_load_stackoverflow)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU636884B2 (en) * 1989-05-23 1993-05-13 Maschinenfabrik Rieter A.G. Optimisation of cleaning
US6408221B1 (en) 1989-05-23 2002-06-18 Maschinenfabrik Reiter Ag Method of and installation for optimizing the process of cleaning cotton
DE3924274A1 (de) * 1989-07-22 1991-01-31 Zinser Textilmaschinen Gmbh Transporteinrichtung zum zufuehren und abtransportieren von vollen und leeren packungstraegern zu und von wenigstens einer spinnereimaschine
DE3924779A1 (de) * 1989-07-26 1991-01-31 Rieter Ag Maschf Verfahren und vorrichtung zum betrieb einer spinnereilinie
IT1237905B (it) * 1989-12-14 1993-06-18 Luigi Pezzoli Procedimento e dispositivi per pilotare e regolare,in funzione della densita' del materiale in lavorazione, le macchine, funzionanti in continuo, in cascata, di un impianto di preparazione del cotone alla filatura.
US5038438A (en) * 1990-03-21 1991-08-13 Industrial Innovators, Inc. Automated yarn manufacturing system
US5509179A (en) * 1990-06-25 1996-04-23 Mondini; Giancarlo Autoleveller draw frame having process feed back control system
EP0513339B1 (de) * 1991-01-23 2001-05-09 Maschinenfabrik Rieter Ag Eine Anlage mit einem Prozessleitrechner
EP0548023A1 (de) * 1991-12-17 1993-06-23 Maschinenfabrik Rieter Ag Durchfluszsteuerung einer Putzereilinie
US5515266A (en) * 1992-01-12 1996-05-07 Meyer; Urs Textile spinning machine management system
DE19630018A1 (de) * 1996-07-25 1998-01-29 Rieter Ag Maschf Anlage zum Verarbeiten von Fasern
DE59711965D1 (de) 1996-05-20 2004-11-04 Rieter Ag Maschf Anlage zum Verarbeiten von Fasern
DE50005500D1 (de) 1999-11-24 2004-04-08 Rieter Ag Maschf Selektive Reinigungslinie
EP1167591A1 (de) * 2000-06-23 2002-01-02 Maschinenfabrik Rieter Ag Übertragungsfaktor
JP3951670B2 (ja) * 2001-11-02 2007-08-01 オムロン株式会社 中央管理装置、センサネットワークシステム、センサ管理装置、情報処理プログラム、および該プログラムを記録したコンピュータ読み取り可能な記録媒体
JP3951671B2 (ja) * 2001-11-02 2007-08-01 オムロン株式会社 センサ管理装置、センサネットワークシステム、情報処理プログラム、および該プログラムを記録したコンピュータ読み取り可能な記録媒体
CN102216503B (zh) * 2008-11-14 2014-02-19 乌斯特技术股份公司 用于优化纺织厂中生产过程的方法
DE102015106415A1 (de) * 2014-12-13 2016-06-16 Trützschler GmbH + Co KG Textilmaschinenfabrik Verfahren und Vorrichtung zum Beschicken einer Anlage mit Fasern
CH713861A1 (de) * 2017-06-08 2018-12-14 Rieter Ag Maschf Produktionssteuerung in einer Putzerei.
CH714843A1 (de) * 2018-03-29 2019-09-30 Rieter Ag Maschf Speisevorrichtung zu einer Karde.
CH720835A1 (de) * 2023-06-06 2024-12-13 Rieter Ag Maschf Verfahren und Vorrichtung zur Produktionssteuerung von Karden

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CH546285A (de) * 1971-12-22 1974-02-28 Zellweger Uster Ag Verfahren und vorrichtung zur steuerung des fuellungsgrades von bandspeichern in der textilindustrie, insbesondere in spinnerei.
US4163927A (en) * 1977-05-04 1979-08-07 Fiber Controls Corporation Auto-leveler circuit
DE2944428C2 (de) * 1979-11-03 1984-08-30 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zur Produktionssteuerung und Bandregulierung einer Karde
DE3120133C2 (de) * 1981-05-20 1985-05-09 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zur Regelung und Steuerung einer Karde oder Krempel
DE3143285C2 (de) * 1981-10-31 1986-07-10 Trützschler GmbH & Co KG, 4050 Mönchengladbach Vorrichtung zum Erzeugen eines gleichmäßigen Faserbandes an einer Karde
DE3205776C3 (de) * 1982-02-18 1996-06-13 Truetzschler Gmbh & Co Kg Verfahren und Vorrichtung zur Regulierung der einer Krempel zuzuführenden Fasermenge
DE3237864C2 (de) * 1982-10-13 1996-05-23 Truetzschler Gmbh & Co Kg Verfahren und Vorrichtung zum Steuern und Regeln einer Spinnereivorbereitungsanlage
CH668781A5 (de) * 1984-09-25 1989-01-31 Zellweger Uster Ag Verfahren und vorrichtung zur optimierung des streckprozesses bei regulierstrecken der textilindustrie.

Also Published As

Publication number Publication date
DE3864647D1 (de) 1991-10-10
IN171722B (enrdf_load_stackoverflow) 1992-12-19
JPH01111023A (ja) 1989-04-27
EP0311831A1 (de) 1989-04-19
ES2026983T3 (es) 1992-05-16
US4876769A (en) 1989-10-31
CN1032822A (zh) 1989-05-10
CN1020932C (zh) 1993-05-26

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