EP0648285B1 - Streckverfahren - Google Patents

Streckverfahren Download PDF

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Publication number
EP0648285B1
EP0648285B1 EP94915126A EP94915126A EP0648285B1 EP 0648285 B1 EP0648285 B1 EP 0648285B1 EP 94915126 A EP94915126 A EP 94915126A EP 94915126 A EP94915126 A EP 94915126A EP 0648285 B1 EP0648285 B1 EP 0648285B1
Authority
EP
European Patent Office
Prior art keywords
yarn
temperature
godet
measuring
tensile force
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
EP94915126A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0648285A1 (de
Inventor
Albert Stitz
Hans Peter Berger
Ulrich Enders
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Barmag AG
Original Assignee
Barmag AG
Barmag Barmer Maschinenfabrik AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Barmag AG, Barmag Barmer Maschinenfabrik AG filed Critical Barmag AG
Publication of EP0648285A1 publication Critical patent/EP0648285A1/de
Application granted granted Critical
Publication of EP0648285B1 publication Critical patent/EP0648285B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/224—Selection or control of the temperature during stretching
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/227—Control of the stretching tension; Localisation of the stretching neck; Draw-pins

Definitions

  • the invention relates to a method for drawing threads in a drawing zone equipped with a temperature control device for influencing the thread temperature for the thread and a device for drawing a thread passing through a drawing zone with a temperature control device for influencing the thread temperature.
  • Such a method and such a device are known, for example, from DE-OS 38 08 854 (Bag. 1571), from DE-PS 33 46 677, DE-AS 22 04 535 (Bag. 1374, Bag. 832), as well as US Pat. No. 3,509,595, US Pat. No. 2,930,102.
  • the thread is drawn by the draw-off from the spinneret at very high take-off speeds and / or by the speed difference between two interposed godets and in any case heated in the drawing zone.
  • the invention is not limited to such methods, but is suitable for all drawing devices which are equipped with temperature control devices for influencing the thread temperature.
  • the object of the invention is to provide a method and a device by means of which unforeseen changes in the heat exchange between the temperature control device and the thread or their consequences are reliably detected and eliminated.
  • the method according to the invention for drawing threads in a stretching zone equipped with a temperature control device for influencing the thread temperature for the thread is characterized in that the effect of the temperature control device on the thread influencing the thread temperature is regulated as a function of a control signal which originates in or behind the thread Draw zone at a measuring point is continuously measured thread tension (thread tension), the measuring point being selected so that there is a defined conveyance of the thread between the temperature control device and the measuring point.
  • the invention is based on the knowledge, verified by extensive tests, that the course of the heat transfer influences the thread tension very significantly. It turns out that also in the processing zones following the stretching zone, e.g.
  • the difference between the actual value of the thread tension and A predefinable setpoint is a further development which has the advantage that first the process-technically optimal specification of the thread tension is possible and only the deviations from this specification are recorded and implemented to adapt the temperature of the temperature control device, ie the heating or cooling device.
  • the invention also relates to a device provided with a temperature control device for influencing the thread temperature and which is particularly suitable for carrying out the method according to the invention for drawing a thread passing through a drawing zone. After the stretching zone, this has a device for continuously or at intervals measuring the thread tension and evaluation electronics for converting the determined tension deviations into correction signals, which is connected via a signal line to the device for thread tension measurement and also to a temperature control of the temperature control device.
  • the temperature control device can be a heating device, the device for measuring the thread tension via the signal line and the evaluation electronics being connected to the device for regulating the temperature of the heating device.
  • the processing of measurement signals and the generation of correction signals as a function of the deviation of a measured actual value from a predetermined target value can of course also be integrated in the device for measuring the thread tension, the further processing then taking place in the evaluation electronics.
  • the device for measuring the thread tension lies behind the the stretching godet that closes the stretching zone. It forwards the ascertained actual values or correction signals ascertained therefrom via a signal line and evaluation electronics for influencing the godet temperature to a device for regulating them.
  • the actual value signals or signals derived therefrom can, for example, be fed to a correction value generator connected downstream of the control center in order to influence the signals for the godet heating supplied by a control center depending on the thread tension. It has proven to be favorable for stabilizing the thread tension if the heated stretch godet is connected upstream of a pretensioning godet.
  • the pretensioning godet is also advantageously heated. Particularly when using an unheated or heated pretensioning godet, the device for measuring the thread tension of the stretching godet is connected downstream.
  • the method according to the invention can be applied to all drawing devices in which the temperature of the thread passing through the drawing zone is influenced by a heating device, in addition to the above-mentioned heated godet, for example a heating tube of any design, a heating rail, a heating box, or also by a cooling device.
  • a heating device in addition to the above-mentioned heated godet, for example a heating tube of any design, a heating rail, a heating box, or also by a cooling device.
  • the device for influencing the thread temperature is, for example, a cooling tube as a cooling device with a controllable cooling effect, in the wall of which there are air supply openings to which at least one adjustable throttle or orifice for regulating the air quantity and thus the cooling effect is assigned.
  • the device provided by the device for measuring the thread tension provided behind the cooling device Signals are used to adjust the throttle (s) or orifice (s).
  • the procedure can be such that the actual values of the thread tension measured at the measuring point are compared with a predeterminable (possibly time-dependent) target value, correction signals for guiding the godet temperature being determined from the deviations of the actual values of the thread tension from the target value.
  • Empirical empirical values obtained, for example, from the evaluation of recorded production data can, for example, serve as the basis for a (time-dependent or constant) nominal value of the thread tension or the mean value of such empirical values.
  • a tolerance range is advantageously taken into account, which can also be determined on the basis of empirical values.
  • the temperature of the temperature control device specified by a control center can be modified in such a way that the thread tension does not leave a tolerance range specified for the temporal progression of the thread tension.
  • FIG. 1 shows a drawing device 1, which is shown only schematically by a spinning device 3, a drawing zone 2 delimited by two godets 4 and 5, and a winder 6.
  • a device 7 for Measurement of the thread tension for example an inline thread tension measuring head equipped with a thread tension sensor 8, which is described in the unpublished German application P 43 00 633.7 (Bag. IP-2001), is arranged.
  • This device 7, 8 for measuring the thread tension is connected via a signal line 22 to an electronic evaluation unit 11, in which the thread tension fluctuations measured by the device 7 for thread tension detection are converted into correction values in comparison with target values and the signals coming from a control center 10 are given.
  • the lower part of the drawing shows the diagram of a godet heater 9 with temperature control for two godets 4 and 5.
  • the signals modified in this way are input into the temperature controls 20 and 21 assigned to the two godets 4 and 5 with the heaters 12 and 13.
  • the temperature values generated by the temperature sensors 14, 15 located in the godets 4, 5 are converted into signals, for example digitized, in measured value converters 16A, 16B and also reach the temperature controls 20, 21 via measured value transformers 17A, 17B, through which - starting from the from the Correction value generator originating and the actual value signals of the godet temperature - the amount of energy supplied to the godet heater by the two RF supplies 18, 19 assigned to the heaters 12, 13 is determined.
  • the basic setting used to specify a constant godet temperature is modified in such a way that changes in the thread temperature leading to fluctuations in the tension of the thread are corrected.
  • FIGS 2 to 6 show further versions of the stretching device according to the invention.
  • FIG. 2 is a stretching device 1 which differs from that shown in FIG. 1 in that the second of the two godets 4 and 5 can be heated by a godet heater 12.
  • FIG 3 shows a godetless embodiment of a spinning and stretching device according to the invention.
  • the thread runs through a heating tube 24 between the spinning device 3 and the winding 6.
  • the device 7, 8 for measuring the thread tension is provided between the heating tube 24 and the winding 6.
  • the signals generated by this from the thread tension fluctuations pass via the signal line 22, the temperature signals generated by the temperature sensor 27 seated in the heating tube 24 pass via the signal line 31 into the evaluation electronics 11, where the setpoints given by the control center 10 and thus the power supply 29 of the Heating tube depending on the measurement of the thread tension and actual temperature signals originating from the temperature measurement are modified.
  • a godet is provided between the end of the heating tube 24 and the winding 6, the device 7, 8 for thread tension detection lies between the godet (not shown) and the winding 6.
  • the heating tube 24 can be one with a fixed length and control of the heating effect on the thread by changing the temperature inside the heating tube 24.
  • a heating tube 24 with a constant internal temperature can also be used, in which the change in the heating effect on the thread required to correct the thread tension fluctuations takes place by changing the length of the heating tube. Accordingly, the correction signals originating from the measurement of the thread tension force, coming via the signal line 22 to the evaluation electronics 11 and then passed on, serve for the change in the heating tube length which is dependent on the thread tension force.
  • FIG. 4 A further embodiment of the stretching device according to the invention is shown in FIG. 4.
  • the possibly pre-oriented thread is fed via a deflection roller 28 and runs into the stretching zone 2 via a first godet 4, where it is heated by being guided over a heating rail 25. It is withdrawn through the stretching godet 5 and, after passing through the device 7, 8 for measuring the thread tension and after converting the determined tension force deviations into correction signals for winding 6.
  • the signals generated by the device 7, 8 reach the evaluation electronics 11 via the signal line 22 , where, together with the correction signals from the temperature monitoring 27, the correction of the setpoint signals coming from the control center 10 and thus the energy supply via the schematic indicated line connection 29 serve.
  • FIG. 5 shows the diagram of a spinning / drawing device equipped according to the invention, which differs from those described so far in that the device for influencing the thread temperature comprises a cooling device 26, which is arranged essentially directly under the spinning device 3 and is monitored by a temperature sensor 27 (Blowing) with adjustable cooling effect.
  • the device 7, 8 for measuring the thread tension is located behind the cooling device and is connected to the device for controlling the cooling effect of the cooling device 26 via a signal line 22 and evaluation electronics 11.
  • the cooling device is a cooling tube 26 with air supply openings provided in its wall. At least one adjustable throttle or orifice is assigned to the latter. Accordingly, the signals from the device 7, 8 for measuring the thread tension are fed via a signal line 22 to a device (not shown), which is guided via the evaluation electronics 11, for adjusting the possibly several throttles or diaphragms via a control line 30.
  • the filament bundle shown in the drawing according to FIG. 5 must be cooled to such an extent before it is brought together to form the thread that the filaments no longer stick to one another, ie that the thread guide causing the combination preferably resides in or at the outlet end of the blowing shaft 26 lies.
  • FIG. 6 shows yet another embodiment of a stretching device 1, similar to that shown in FIG. 2. It is however the first godet 4 is heated.
  • the invention was explained on the basis of stretching and spinning-stretching devices shown in the accompanying drawing. However, it is not limited to the examples shown and described, but can be used successfully with all drawing devices equipped with a device for influencing the thread temperature to improve the quality of the drawing products.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP94915126A 1993-04-30 1994-04-26 Streckverfahren Expired - Lifetime EP0648285B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4314226 1993-04-30
DE4314226 1993-04-30
DE4324448 1993-07-21
DE4324448 1993-07-21
PCT/EP1994/001315 WO1994025653A1 (de) 1993-04-30 1994-04-26 Streckverfahren

Publications (2)

Publication Number Publication Date
EP0648285A1 EP0648285A1 (de) 1995-04-19
EP0648285B1 true EP0648285B1 (de) 1997-07-16

Family

ID=25925415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94915126A Expired - Lifetime EP0648285B1 (de) 1993-04-30 1994-04-26 Streckverfahren

Country Status (10)

Country Link
US (1) US5664307A (enrdf_load_stackoverflow)
EP (1) EP0648285B1 (enrdf_load_stackoverflow)
JP (1) JPH07508567A (enrdf_load_stackoverflow)
KR (2) KR950701991A (enrdf_load_stackoverflow)
CN (1) CN1107642A (enrdf_load_stackoverflow)
CA (1) CA2138669A1 (enrdf_load_stackoverflow)
DE (1) DE59403372D1 (enrdf_load_stackoverflow)
RU (1) RU2114941C1 (enrdf_load_stackoverflow)
TW (1) TW250503B (enrdf_load_stackoverflow)
WO (1) WO1994025653A1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5692271A (en) * 1995-03-07 1997-12-02 Velcro Industries B.V. Enhanced flexibility fastener, method and apparatus for its making, and product incorporating it
CH692704A5 (de) * 1997-10-08 2002-09-30 Rieter Ag Maschf Spinnstreckspul-Maschine.
US5870808A (en) * 1997-10-24 1999-02-16 E. I. Du Pont De Nemours And Company Draw point control arrangement
GB9817980D0 (en) * 1998-08-18 1998-10-14 Fibrevision Limited Measuring instrument
IT1394153B1 (it) 2008-10-21 2012-05-25 Fein Elast Italia S P A Impianto e procedimento per la realizzazione di estrusi continui in materiale siliconico ed estruso continuo in materiale siliconico cosi' ottenuto
WO2016110537A1 (de) * 2015-01-08 2016-07-14 Oerlikon Textile Gmbh & Co. Kg Verfahren und vorrichtung zum verstrecken einer vielzahl von schmelzgesponnenen fasersträngen
DE102017100488A1 (de) 2017-01-12 2018-07-12 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung und Verfahren zur Erzeugung eines texturierten Filamentes oder Garnes
DE102017100487A1 (de) * 2017-01-12 2018-07-12 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung und Verfahren zur Erzeugung eines mehrfarbigen Garnes

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR956955A (enrdf_load_stackoverflow) * 1940-04-03 1950-02-10
US2617007A (en) * 1949-04-07 1952-11-04 Courtaulds Ltd Electric thread heater
US2930102A (en) * 1954-01-22 1960-03-29 British Celanese Tension control
NL133726C (enrdf_load_stackoverflow) * 1962-02-19
US3322933A (en) * 1964-01-16 1967-05-30 Gen Electric Synthetic fiber processing machine
US3395200A (en) * 1964-12-14 1968-07-30 Phillips Petroleum Co Tension control of running thermoplastic filaments
DE2204535B2 (de) * 1972-02-01 1976-06-24 Barmag Banner Maschinenfabrik AG, 5600 Wuppertal Schmelzspinn- und streckverfahren zur herstellung von polyesterfaeden
US4404718A (en) * 1977-10-17 1983-09-20 Teijin Limited Apparatus for manufacturing a bulky textured yarn
JPS5947738B2 (ja) * 1978-03-07 1984-11-21 帝人株式会社 嵩高糸の製造方法
DE3346677A1 (de) * 1983-12-23 1985-07-04 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Verfahren zur herstellung eines multifilen chemiefadens
US4902461A (en) * 1987-03-20 1990-02-20 Barmag, Ag Method for heating an advancing yarn
DE3808854A1 (de) * 1987-03-20 1988-09-29 Barmag Barmer Maschf Heizrohr zum aufheizen eines chemiefaserbuendels
JP2871240B2 (ja) * 1991-10-22 1999-03-17 村田機械株式会社 延伸仮撚機のクーリングプレート
DE4300633A1 (en) * 1992-01-15 1993-07-22 Barmag Barmer Maschf Synthetic multifilament yarn prodn. - in which yarn tension measurement is based on the movement of a flat spring in line with the yarn
DE9306510U1 (de) * 1992-06-13 1993-06-09 Barmag AG, 5630 Remscheid Spinnvorrichtung zum Spinnen synthetischer Fäden

Also Published As

Publication number Publication date
RU94046346A (ru) 1996-10-10
DE59403372D1 (de) 1997-08-21
KR960012828B1 (ko) 1996-09-24
CN1107642A (zh) 1995-08-30
US5664307A (en) 1997-09-09
JPH07508567A (ja) 1995-09-21
WO1994025653A1 (de) 1994-11-10
CA2138669A1 (en) 1994-11-10
RU2114941C1 (ru) 1998-07-10
TW250503B (enrdf_load_stackoverflow) 1995-07-01
KR950701991A (ko) 1995-05-17
EP0648285A1 (de) 1995-04-19

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