EP0469763A1 - System zum Heizen von Garnen - Google Patents

System zum Heizen von Garnen Download PDF

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Publication number
EP0469763A1
EP0469763A1 EP91306633A EP91306633A EP0469763A1 EP 0469763 A1 EP0469763 A1 EP 0469763A1 EP 91306633 A EP91306633 A EP 91306633A EP 91306633 A EP91306633 A EP 91306633A EP 0469763 A1 EP0469763 A1 EP 0469763A1
Authority
EP
European Patent Office
Prior art keywords
yarn
temperature
heater
heating
arrangement according
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.)
Withdrawn
Application number
EP91306633A
Other languages
English (en)
French (fr)
Inventor
Malcolm Geoffrey Hinchliffe
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.)
Rieter Scragg Ltd
Original Assignee
Rieter Scragg Ltd
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 Rieter Scragg Ltd filed Critical Rieter Scragg Ltd
Publication of EP0469763A1 publication Critical patent/EP0469763A1/de
Withdrawn legal-status Critical Current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
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/003—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one stationary surface, e.g. a plate
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
    • D02G1/0266—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting false-twisting machines
    • 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
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/001—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass in a tube or vessel

Definitions

  • This invention relates to yarn heating arrangements, and in particular to arrangements for heating a textile yarn during texturing thereof.
  • crimping may comprise inserting a false twist into the yarn whilst it is heated and then cooled, followed by a de-twisting.
  • heated feed rollers are disposed upstream of a plate heater.
  • the purposes of the heated feed rollers in this case are to enable shrinkage of the yarn to occur, and to preheat the yarn before it enters the crimping zone in which it is heated by the plate heater. This reduces the time taken, and hence the length of the heater plate required, to raise the temperature of the yarn to that required for setting the crimp inserted therein.
  • a twist stop is located between the heated feed rollers and the plate heater, so that the precise length of the crimping,ie twisting, zone is defined, and the processing characteristics of the yarn are carefully controlled.
  • the pre-heating feed rollers are maintained at a temperature of between 56% and 77% of that of the plate heater,ie it would be insufficient to allow the required molecular reorientation in the yarn for setting twist therein if the twist stop were to be dispensed with and the twist could travel around the heated feed rollers.
  • the heating means is divided into two parts. The first part of the heating apparatus, which could take any one of several forms, e.g.
  • a plate heater is intended to raise the temperature of the yarn only to that sufficient for drawing, despite it being in the crimping zone.
  • a plate heater Only at the second part of the heating apparatus, a plate heater, is the temperature of the yarn raised sufficiently for crimp setting.
  • the first heating means is maintained at a temperature of between 45% and 76%, preferably 60%,of the temperature of the second heating means.
  • the length of the plate heater for crimp setting may be less than would be the case if no preheating were provided, nevertheless the overall length of the preheating and main heating zone is not significantly reduced by comparison with a single plate heater.
  • European Patent Publication No 0087124 discloses a pre-heating plate and a main heating plate with a twist stop between them
  • the pre-heating plate is disposed so far upstream of the twist stop and the crimping zone,in which the main heater is disposed,that the yarn has cooled before it reaches the latter.
  • the length of the main heater is not reduced by virtue of the provision of the pre-heating device, and it is stated that the pre-heating effects obtained in the other prior art arrangements are not achieved with this arrangement.
  • non-contact heaters which can be a temperatures considerably greater than the melting temperature of the yarn.
  • Such heaters enable very rapid raising of the temperature of the yarn, and hence a relatively short yarn path in the heating zone can be achieved compared with conventional contact heaters.
  • the yarn temperature rises so rapidly along the yarn path through the heating zone, and small changes in heating zone length or the rate of heat transfer cause large changes in output temperature, it is very difficult to control accurately the actual temperature reached by the yarn and to ensure that it is not significantly above or below the desired crimp setting temperature. In consequence with such heating arrangements it is very difficult to control accurately the final characteristics of the textured yarn.
  • Furthermore lack of support for the yarn in the crimping zone when using non-contact heaters can lead to process instability.
  • the invention provides a yarn heating arrangement disposed in a crimping zone, comprising a first heating means maintained at a temperature in excess of the crimp setting temperature of the yarn and operable to heat the yarn to a temperature less than the crimp setting temperature and immediately downstream of the first heating means a smoothing heater maintained substantially at, and operable to heat the yarn to, that crimp setting temperature.
  • the crimping zone may extend between twist stopping means and false twisting means.
  • the first heating means is maintained at a temperature in excess of the melting temperature of the yarn, and the first heating means may be non-contact heating means operable to heat the yarn by radiation.
  • the smoothing heater is a contact heater, which may be a plate providing a substantially straight yarn path.
  • the first heating means may be operable to heat the yarn to a temperature of between 85% and 98% of the crimp setting temperature of the yarn. Temperature sensing means may be disposed adjacent the exit end of the first heating means,and control means may be provided to control the temperature of the first heating means in response to a signal received from the sensing means if the yarn temperature lies outside that range, whereby the yarn is heated to a temperature within that range as it passes from the first heating means into contact with the smoothing heater.
  • the first heating means may be an infra-red heater.
  • the contact smoothing heater may be heated in any known manner, for example by means of electrical heating elements disposed along its length, or by means of a vapour-phase fluid being in good thermal contact with the heater plate.
  • the temperature of the first heating means may be at least 350°C, for example 650°C, and the temperature of the smoothing heater may be in the range 180°C to 280°C, for example 225°C.
  • the length of the first heating means may be substantially 0.75mm and the length of the smoothing heater may be substantially 0.25m.
  • a conventional false-twist texturing machine 10 comprising a creel 11 having a supply of yarn packages 12 therein, and in sequence for each yarn 13, a first feed device 14, a long plate heater 15, a cooling plate 16, a false twist device 17, a second feed (and drawing) device 18, and wind-up means 19.
  • the first feed device 14 is operable to withdraw the yarn 13 from a package 12 and feed it to the heater 15.
  • the heater 15 and the cooling plate 16 are aligned with each other to provide a substantially straight, but relatively long, yarn path through-out the heating and cooling zones in which the yarn 13 is false twisted by the false twist device 17, and they extend across the operator's aisle 20.
  • a sledge 21 is mounted on a track 22, and has a twist stopping yarn guide 23 mounted thereon.
  • the sledge 21 can be moved to the bottom of the track 22 adjacent the first feed device 14 for threading purposes, and then moved to its operational position at the top of the track 22 to lay the yarn 13 on the surfaces of the heater 15 and cooling plate 16.
  • the second feed device 18 is operable to feed the yarn 13 from the false-twist device 17 to the wind up means 19 and, if run at a faster yarn throughput speed than the first yarn feed device 14, to draw the yarn 13 between the two feed devices 14, 18.
  • the temperature of the heating plate 15 is arranged to be substantially that at which the false-twist can be set in the yarn 13, and the length of the heating plate 15, typically 1.5m to 2.5m, is such as to enable the yarn 13 to reach that temperature during its time in contact therewith.
  • the length of the cooling plate 16 is such as to enable the yarn to cool sufficiently to withstand the mechanical effects of the false twist device 17 and to retain the twist memory as it is untwisted between the false twist device 17 and the second feed device 18. Because of these length requirements and the desirability of having a substantially straight yarn path through the heating and cooling zones in order that the twist can run back to the twist stop guide 23, the inlet end of the heater 15 is beyond the reach of an operator standing in the operator's aisle 20, and therefore an upper maintenance platform 24 is provided. This adds to the cost of the machine 10, and contributes to the overall large dimensions of the machine 10.
  • a false-twist texturing machine 30 which is generally the same as the machine 10 described above, and corresponding parts of the two machines 10, 30 are identified by corresponding reference numerals.
  • the long plate heater 15 of machine 10 has been replaced by a short plate smoothing heater 31 and a non-contact first heater 32.
  • the combined length of the two heaters 31, 32 is approximately half of that of the single heater 15 of the conventional machine 10,so that the overall dimensions, particularly the height, of the machine 30 of the present invention is considerably less than that of the machine 10.
  • Such a reduction of heater length is demonstrated as follows :
  • the smoothing heater 31 provides a substantially straight yarn path which is aligned with the path of the yarn 13 through the non-contact first heater 32. This enables the whole of the twisting zone from the false twisting device 17 back to the twist stopping yarn guide 23 to be substantially straight for good twist propagation, but within a reduced overall length in comparison with the prior known arrangements shown in Fig 1.
  • a temperature sensor 33 is provided adjacent the exit end of the first heater 32 to sense the temperature of the yarn 13 as it leaves that heater and passes to the smoothing heater 31.
  • the sensor 33 provides an output signal proportional to the yarn temperature, and the signal is fed to the control means 34 which controls the temperature of the first heater 32 by adjustment of the electrical input thereto if the yarn temperature lies outside the aforementioned range of between 85% and 98% of the predetermined twist setting temperature of the yarn 13.
  • the conventional arrangement and the arrangements in accordance with the invention give comparable heating of the yarn, but that the overall length of the heating zone in the latter two cases (1 metre) is appreciably less than that of the former conventional case (2.25metres).
  • the arrangement of the invention provides easier access by the operator and maintenance personnel to the inlet end of the heating zone using a trolley instead of a ladder and upper walkway as is required with the conventional arrangement.
  • the output temperature of the yarn from the two heaters in accordance with the invention i.e. a high temperature first heater and a smoothing heater substantially at the twist setting temperature of the yarn, is more accurately controlled than is possible by using a high temperature heater alone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP91306633A 1990-08-03 1991-07-22 System zum Heizen von Garnen Withdrawn EP0469763A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909017087A GB9017087D0 (en) 1990-08-03 1990-08-03 Yarn heating arrangement
GB9017087 1990-08-03

Publications (1)

Publication Number Publication Date
EP0469763A1 true EP0469763A1 (de) 1992-02-05

Family

ID=10680142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91306633A Withdrawn EP0469763A1 (de) 1990-08-03 1991-07-22 System zum Heizen von Garnen

Country Status (3)

Country Link
EP (1) EP0469763A1 (de)
JP (1) JPH04245941A (de)
GB (2) GB9017087D0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263913A (en) * 1992-02-05 1993-08-11 British Tech Group False twist texturing
EP0571974A1 (de) * 1992-05-27 1993-12-01 TEIJIN SEIKI CO. Ltd. Falschzwirntexturiermaschine
EP0607799A1 (de) * 1993-01-19 1994-07-27 TEIJIN SEIKI CO. Ltd. Vorrichtung zum Heizen synthetischen Garne
WO2017093551A1 (de) * 2015-12-05 2017-06-08 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum temperieren eines laufenden fadens

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237392A (en) * 1963-08-14 1966-03-01 Chavanoz Moulinage Retorderie Process for producing bulked yarn
DE2211658A1 (de) * 1972-03-10 1973-09-20 Dienes Honeywell Gmbh Anordnung zur temperaturueberwachung
JPS6386840A (ja) * 1985-10-11 1988-04-18 マーチン・マリエッタ・エナジー・システムズ・インク 高温加工可能なニツケル−鉄アルミニド合金
DE4035698A1 (de) * 1989-11-09 1991-05-16 Du Pont Verfahren zum bestimmen des bauschigkeitsgrades und zur steuerung desselben
EP0412429B1 (de) * 1989-08-09 1994-11-17 Barmag Ag Heizeinrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1100715B (it) * 1978-12-13 1985-09-28 Snia Viscosa Procedimento per la fabbricazione di filati poliesteri testurizzati aventi proprieta' meccaniche micliorate
JPS56154528A (en) * 1980-04-23 1981-11-30 Toray Industries False twisting processing apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237392A (en) * 1963-08-14 1966-03-01 Chavanoz Moulinage Retorderie Process for producing bulked yarn
DE2211658A1 (de) * 1972-03-10 1973-09-20 Dienes Honeywell Gmbh Anordnung zur temperaturueberwachung
JPS6386840A (ja) * 1985-10-11 1988-04-18 マーチン・マリエッタ・エナジー・システムズ・インク 高温加工可能なニツケル−鉄アルミニド合金
EP0412429B1 (de) * 1989-08-09 1994-11-17 Barmag Ag Heizeinrichtung
DE4035698A1 (de) * 1989-11-09 1991-05-16 Du Pont Verfahren zum bestimmen des bauschigkeitsgrades und zur steuerung desselben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 17 (C-675)(3960) 16 January 1990 & JP-A-63 086 840 ( TEIJIN SEIKI CO LTD ) 17 October 1989 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263913A (en) * 1992-02-05 1993-08-11 British Tech Group False twist texturing
GB2263913B (en) * 1992-02-05 1996-04-03 British Tech Group Texturing yarn
US5802832A (en) * 1992-02-05 1998-09-08 University Of Manchester Institute Of Science And Technology Texturing yarn
EP0571974A1 (de) * 1992-05-27 1993-12-01 TEIJIN SEIKI CO. Ltd. Falschzwirntexturiermaschine
EP0607799A1 (de) * 1993-01-19 1994-07-27 TEIJIN SEIKI CO. Ltd. Vorrichtung zum Heizen synthetischen Garne
CN1038861C (zh) * 1993-01-19 1998-06-24 帝人制机株式会社 合成纤维丝条的加热装置及其用途
WO2017093551A1 (de) * 2015-12-05 2017-06-08 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum temperieren eines laufenden fadens

Also Published As

Publication number Publication date
GB9017087D0 (en) 1990-09-19
GB2247251A (en) 1992-02-26
GB9115570D0 (en) 1991-09-04
JPH04245941A (ja) 1992-09-02

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