EP0754788B1 - Verfahren und Vorrichtung zur Vermeidung von Masseschwankungen in Fasermaterial - Google Patents
Verfahren und Vorrichtung zur Vermeidung von Masseschwankungen in Fasermaterial Download PDFInfo
- Publication number
- EP0754788B1 EP0754788B1 EP96111012A EP96111012A EP0754788B1 EP 0754788 B1 EP0754788 B1 EP 0754788B1 EP 96111012 A EP96111012 A EP 96111012A EP 96111012 A EP96111012 A EP 96111012A EP 0754788 B1 EP0754788 B1 EP 0754788B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- control
- fibre material
- rotor
- control device
- 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
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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
- 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
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/32—Regulating or varying draft
- D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities
Definitions
- the invention relates to a method for avoiding fluctuations in mass in fiber material that is spun with a Rotor is processed into a yarn in which fluctuations in mass in the Fiber material, which is fed as a sliver, recorded and in immediate proximity to the rotor and thus drive-related Elements the mass fluctuations in the fiber material by one Control intervention can be reduced.
- the device for carrying out the Method has a drive for an element for conveying the Fiber material in the vicinity of an opening roller and a rotor on that connected to and from a control device is controlled, the control device having a tape measuring element connected is.
- a disadvantage of such rotor spinning machines is that Irregularities in the mass of the sliver fed Irregularities in the spun yarn at the exit of the spinning station to lead. This can be prevented by taking care of that that the sliver fed is as regular as possible, i.e. seen as far as possible over its length and cross-section Fluctuations in mass. But this is only possible if such influence for organizational reasons really consists. If you buy such tapes for the processing to yarn, so this possibility is practical Not.
- EP 0275 471 which describes an object that the The present invention is closest to one method and one Device for equalizing the density of a fiber mat at the entrance a rotor spinning machine known in which the fiber mat by a Clamping gap is fed to a feed roller. In this constant clamping gap, a signal is obtained that a Dependence on the fiber density in the clamping gap. Then the Speed of rotation of this feed roller depending on this Signals changed.
- a disadvantage of this method is that only the Inequalities in the fiber wadding density to be fed in are recorded and as far as can be detected in the fixed clamping gap, corrected.
- the corrected deviations in density are only temporary. Long-term deviations and irregularities in the rotor Cause are not recorded and corrected.
- EP 0 176 661 describes a method and an apparatus for Optimization of the stretching process for regulating sections of the Known textile industry.
- the cross section of the belt should do that stretch is both at the inlet and at the exit of the stretch passage be recorded or measured. With the resulting signals the amount of delay is controlled.
- the task is solved by a method in which the Fluctuations in mass in the yarn are recorded at the outlet and for the Control intervention can be used.
- the Control intervention can also be a function of the mass of the supplied Fiber material and the yarn.
- the device for Implementation of the method has a control device that also is connected to a yarn measuring device. In addition, it can be used with a Be connected to the tape measuring element, which is connected upstream of the opening roller.
- the control device can also be equipped with a pulse generator connected, which indicates the current working speed.
- the Control device can also have an open and a closed Form a control loop.
- the open control loop can be used with a Monitoring of the yarn may be provided. Or, the control device can also only form a closed control loop.
- the Control device is preferably also with a yarn sensor Monitoring of the control process connected.
- the Take-off roller 12, the rotor 10 and the opening roller 7 are over a drive train 13 driven and rigid in terms of drive connected with each other.
- the feed roller 6, the opening roller 7 and the take-off roller 12 are elements which are drive-connected to the rotor can be and are arranged in its neighborhood, because they work directly with the rotor 10. All these elements form a drive for the fiber material.
- the elements previously described are known per se and in a The rotor spinning machine can be found in the spinning station or box.
- the device is the feed roller 6 via a drive train 14 connected to a control device 15.
- Lines 16, 17 is also with the here as a tape measuring element trained or equipped with a tape measuring device 5 and connected to a pulse generator 18 which is from the drive train 13 impulses can derive its speed are proportional.
- Another line 19 is used for feeding and a bus 20 serves as a connection to a central unit 21st
- the control device 15 here comprises a servo motor or control motor 22 and a transmission 23 for the drive train 14, and a computer for processing signals for the control motor 22 or processor 24, an amplifier 25 and an evaluation unit 26. This is for transforming a physical Size trained in an electrical signal.
- the processor 24 usually has analog / digital and digital / analog converters, which are connected to inputs or outputs, and a microprocessor with memory.
- the operation of the device according to FIG. 1 is as follows:
- the mass fluctuations are in the band measuring element in the band compressor 5 detected in the fiber material 1 and in an electrical signal converted, which is fed via line 16 to the evaluation unit 26 becomes.
- the current measured value is shown there Threshold values compared that have a tolerance range for the Determine measured values that do not trigger a control process.
- evaluated Signals preferably analog signals, are sent to the processor 24 supplied, digitized there, linearized, according to predetermined Aspects monitored, delayed and intensified.
- the Processor 24 also has a signal from pulse generator 18 available which is the current working speed of the other elements indicates. From the computer 24, based on the input signals, i.e.
- the speed and instantaneous mass of the sliver determines an output signal and sends it to the amplifier 25 submitted that represents a correction quantity or a control value, the the new peripheral speed of the feed roller 6th indicates.
- This correction variable controls the speed of rotation of the control motor 22 and thus also the rotational speed via the gear 23 the feed roller 6.
- the control loop shown here is therefore an open control loop that aims at the opening roller 7 to produce a uniform fiber covering. So can be expected to have a very even fiber flow reaches the rotor 10 via the fiber suction device 9.
- Figure 2 shows a device, which is essentially the elements 1, but in which the line 16 is connected to a sensing element 36 which is the feed trough 8 replaced or supplemented.
- the sensing element 36 is spring-loaded and presses the sliver 1 onto the feed roller 6.
- the sliver 1 steers the sensing element 36 in proportion to the mass of the fiber material 1 off and this deflection is converted into an electrical signal changed.
- the signal processing in the control device 15 happens in a known way.
- a gear a differential or planetary gear 27 is provided. This is via a drive train 28 with the drive train 13 connected so that the servo motor 22 only a speed change in the drive train 14 for the feed roller 6. The average speed from which this speed change is based is supplied to the differential gear 27 via the drive train 28.
- the yarn measuring member 29 is also a yarn measuring element 29 after the rotor 10, arranged at the outlet of the spinning station 2.
- the yarn measuring member 29 can be in front (as shown here) or be arranged after the take-off roller 12.
- the yarn measuring member 29 is a well-known element that the yarn optically, for example or capacitively scanned.
- the yarn measuring member 29 is via a line 30 with an evaluation unit 32 in the control device 31 connected.
- the evaluation unit 32 has the same function as that Evaluation unit 26 in the control device 15 (FIG. 1).
- This Structure results in a control behavior as it is for combined Open and closed control loops, for example for drafting systems is known from EP 0176661.
- the closed control loop is here through the yarn measuring member 29, the line 30, the control device 31 and the drive train 14 formed.
- the open one Control loop is already known from Figures 1 to 3.
- This version can also work so that the yarn measuring element 29 is used for monitoring and thus only the quality of the Control process in, between the belt compressor 5 and the feed roller 6 used, open control loop monitors.
- FIG. 5 Another embodiment is known from FIG. 5, in which the Yarn hopper 11 at the outlet of the rotor 10 a device for Measure the mass of yarn passing through that outputs a signal to line 33. Such a measurement can but also take place only after the take-off roller 12.
- the processing the signals in the control device 31 are known Wise in front of you.
- Figures 6 and 7 each show only a closed control loop 37, 38 which in the embodiment according to FIG the funnel 11 and in the embodiment according to FIG the independent yarn measuring member 29 extends.
- Figure 8 shows an embodiment in which the withdrawal speed influenced by the take-off roller 12 with a control intervention becomes.
- the take-off roller 12 is via a drive train 34 connected to the transmission 23.
- the yarn measuring member 29 a Detected thin point
- the pull-off speed is reduced. If there is a thick spot in yarn 3, it is increased.
- These processes cause the yarn to be slightly earlier or later than in Section is withdrawn from the rotor 10.
- This version is particularly suitable in a Combination with a control loop such as that of 1 is already known.
- a measurement based on the pulling speed of the yarn is regulated, also, as is now known, take place at the feed trough 1.
Description
Claims (11)
- Verfahren zur Vermeidung von Masseschwankungen in Fasermaterial, das in einem Spinnprozess mit einem Rotor (10) zu einem Garn (3) verarbeitet wird, bei dem Masseschwankungen im Fasermaterial, das als Faserband (1) zugeführt wird, erfasst und in unmittelbarer Nachbarschaft zum Rotor und damit antriebsverbundener Elemente (6, 7, 12) die Masseschwankungen im Fasermaterial durch einen Regeleingriff verringert werden, dadurch gekennzeichnet, dass die Masseschwankungen auch im Garn (3) am Auslauf erfasst und für den Regeleingriff verwendet werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als Regeleingriff die Geschwindigkeit der Zufuhr des Fasermaterials am Eingang des Spinnprozesses beeinflusst wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als Regeleingriff die Geschwindigkeit des Abzugs des Garnes am Ausgang des Spinnprozesses beeinflusst wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Regeleingriff in Funktion der Masse des zugeführten Fasermaterials und des Garns erfolgt.
- Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, mit einem Antrieb für ein Element (6, 12), das zum Fördern des Fasermaterials (1) in der Umgebung einer Auflösewalze (7) und des Rotors (10) vorgesehen ist, der mit einer Regelvorrichtung (15) verbunden und von dieser gesteuert ist, die mit einem Bandmessorgan (5) verbunden ist, dadurch gekennzeichnet, dass die Regelvorrichtung auch mit einem Garnmessorgan (29) verbunden ist.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Regelvorrichtung zusätzlich mit einem Bandmessorgan (5, 36) verbunden ist, das der Auflösewalze (7) vorgeschaltet ist.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Regelvorrichtung zusätzlich mit einem Impulsgeber (18) verbunden ist, der die aktuelle Arbeitsgeschwindigkeit angibt.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass ein offener (5, 16, 31, 14, 6) und ein geschlossener (29, 30, 31, 14, 6) Regelkreis vorgesehen sind.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass ein offener (5, 16, 31, 14, 6) Regelkreis mit einer Überwachung des Garnes vorgesehen ist.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass ein geschlossener (29, 30, 31, 14) Regelkreis vorgesehen ist.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Garnsensor (29) zur Überwachung des Regelvorganges mit der Regelvorrichtung (15) verbunden ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2127/95 | 1995-07-19 | ||
CH212795 | 1995-07-19 | ||
CH212795 | 1995-07-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0754788A1 EP0754788A1 (de) | 1997-01-22 |
EP0754788B1 true EP0754788B1 (de) | 2002-09-25 |
Family
ID=4226516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96111012A Expired - Lifetime EP0754788B1 (de) | 1995-07-19 | 1996-07-09 | Verfahren und Vorrichtung zur Vermeidung von Masseschwankungen in Fasermaterial |
Country Status (6)
Country | Link |
---|---|
US (1) | US5775085A (de) |
EP (1) | EP0754788B1 (de) |
JP (1) | JPH0931774A (de) |
CN (1) | CN1082104C (de) |
DE (1) | DE59609712D1 (de) |
TR (1) | TR199600596A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19855588A1 (de) † | 1998-12-02 | 2000-06-08 | Schlafhorst & Co W | Verfahren und Vorrichtung zur Auswertung der Wirkung von Garneigenschaften auf das Aussehen textiler Flächengebilde |
DE102014003329A1 (de) * | 2014-03-08 | 2015-09-10 | Saurer Germany Gmbh & Co. Kg | Verfahren und Vorrichtung zum Betreiben einer Offenend-Rotorspinnmaschine |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4835616B1 (de) * | 1967-12-12 | 1973-10-29 | ||
CS151696B1 (de) * | 1970-01-19 | 1973-11-19 | ||
CS167566B1 (de) * | 1972-09-26 | 1976-04-29 | ||
DE2525461A1 (de) * | 1975-06-07 | 1976-12-16 | Stueber Kg Otto | Verfahren zur ermittlung des sogenannten moiree-effektes beim spinnen und vorrichtung zur durchfuehrung des verfahrens |
CH612152A5 (de) * | 1976-01-26 | 1979-07-13 | Rieter Ag Maschf | |
DE2605737B2 (de) * | 1976-02-13 | 1979-08-30 | Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt | Arbeitsverfahren zum Erkennen des fehlerhaften Arbeitens von Spinnaggregaten von Offen-End-Spinnmaschinen |
DE2605736C3 (de) * | 1976-02-13 | 1981-07-30 | Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt | Verfahren und Vorrichtung zum Erkennen des fehlerhaften Arbeitens von Spinnaggregaten von Offen-End-Spinnmaschinen |
DE2849061C2 (de) * | 1977-11-17 | 1986-09-25 | Hollingsworth (U.K.) Ltd., Accrington, Lancashire | Verfahren zum Stillsetzen einer OE- Rotorspinnmaschine und OE-Rotorspinnmaschine |
CH627498A5 (de) * | 1978-04-26 | 1982-01-15 | Zellweger Uster Ag | Verfahren und vorrichtung zur ausregulierung von bandgewichtsschwankungen an karden, krempeln und strecken. |
CS210059B1 (en) * | 1978-12-29 | 1982-01-29 | Karel Mikulecky | Device for the control,adjustment and regulation of the working place e.g.textile production unit or machine with the said units |
DE3010303C2 (de) * | 1980-03-18 | 1983-11-17 | Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt | Vorrichtung zum Unterbrechen der Faserbandzufuhr bei Offenend-Spinneinheiten |
DE3425345A1 (de) * | 1984-07-10 | 1986-01-30 | Trützschler GmbH & Co KG, 4050 Mönchengladbach | Verfahren und vorrichtung zum erzeugen einer gleichmaessigen, kontinuierlichen fasermenge |
IN170276B (de) * | 1986-12-12 | 1992-03-07 | Rieter Ag Maschf |
-
1996
- 1996-06-11 JP JP8183920A patent/JPH0931774A/ja active Pending
- 1996-07-09 EP EP96111012A patent/EP0754788B1/de not_active Expired - Lifetime
- 1996-07-09 DE DE59609712T patent/DE59609712D1/de not_active Expired - Fee Related
- 1996-07-18 US US08/683,405 patent/US5775085A/en not_active Expired - Fee Related
- 1996-07-19 TR TR96/00596A patent/TR199600596A2/xx unknown
- 1996-07-19 CN CN96110790A patent/CN1082104C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN1146505A (zh) | 1997-04-02 |
JPH0931774A (ja) | 1997-02-04 |
CN1082104C (zh) | 2002-04-03 |
US5775085A (en) | 1998-07-07 |
EP0754788A1 (de) | 1997-01-22 |
TR199600596A2 (tr) | 1997-02-21 |
DE59609712D1 (de) | 2002-10-31 |
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