EP0281657B1 - Falschdrall-Kräuselmaschine - Google Patents

Falschdrall-Kräuselmaschine Download PDF

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Publication number
EP0281657B1
EP0281657B1 EP19870103605 EP87103605A EP0281657B1 EP 0281657 B1 EP0281657 B1 EP 0281657B1 EP 19870103605 EP19870103605 EP 19870103605 EP 87103605 A EP87103605 A EP 87103605A EP 0281657 B1 EP0281657 B1 EP 0281657B1
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EP
European Patent Office
Prior art keywords
yarn
heater
false twisting
feed rollers
less
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
Application number
EP19870103605
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English (en)
French (fr)
Other versions
EP0281657A1 (de
Inventor
Hidenori Takai
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.)
Murata Machinery Ltd
Original Assignee
Murata Machinery 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 Murata Machinery Ltd filed Critical Murata Machinery Ltd
Priority to DE8787103605T priority Critical patent/DE3767300D1/de
Priority to EP19870103605 priority patent/EP0281657B1/de
Publication of EP0281657A1 publication Critical patent/EP0281657A1/de
Application granted granted Critical
Publication of EP0281657B1 publication Critical patent/EP0281657B1/de
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • This invention relates to a false twisting machine according to the preamble part of claim 1, and method for false twisting filaments, fibers and yarns such as those made of nylon or like other synthetic materials, and more particularly, to such a machine and method in which a heater for heating filaments, fibers and yarns has a length extremely shorter than a conventional one.
  • nylon fibers Today, a lot of nylon fibers have been employed for making panty stockings, tights or the like, and in cases where these nylon fibers are false twisted, the nylon fibers are heated, similar to fibers of other synthetic materials, to a relatively low temperature by means of a heater having a length of 2 m or therearound.
  • the feed rollers, the heaters and twisting means are compelled to be disposed on a curved or bent line.
  • the path of the yarn is bent at a location between a pair of feed rollers 3 and a heater 4, or at a location between a heater 4 and a twisting means 5, as shown in Figure 2.
  • Such an arrangement has the disadvantage that the transmission of a twisting motion of the yarn is reduced at a location in which the yarn is bent. Further, as the length of the heater increases, the height of the false twisting machine becomes greater, for example, 3 m or more, so that the building, in which the machine is installed, will be higher, thus increasing the construction cost for the building as well as the production cost of the machine itself. In addition, a worker has to set the yarn on the machine by using a long rod so that working efficiency will be reduced. Also, maintenance of the machine will be difficult and inefficient.
  • a false twisting machine according to the preamble part of claim 1 is known from US-A-3 955 351. Due to the fact that in this machine a relatively small heater having a length of about 2 feet is used only a rather low heating speed of about 150 m/min can be attained.
  • the length of the heater can be greatly reduced, as compared with that of a conventional heater which has been considered necessary in the prior art false twisting technique, by maintaining the heater at a relatively higher temperature while taking account of self heating during drawing and/or false twisting of the nylon yarn.
  • FIG. 4 there is shown a conventional false twisting machine of out-drawing type for undrawn yarns (referred to as U.D.Y.) and partially drawn yarns (referred to as P.D.Y), the machine being adapted to draw a yarn between a pair of first feed rollers 2 and a pair of second feed rollers 3.
  • U.D.Y. undrawn yarns
  • P.D.Y partially drawn yarns
  • the machine being adapted to draw a yarn between a pair of first feed rollers 2 and a pair of second feed rollers 3.
  • the yarn can also be drawn between the second feed rollers 3 and a pair of delivery rollers 6.
  • the false twisting machine illustrated in Figure 4 includes a supply bobbin 1 for supplying an untreated nylon yarn 1', the pair of first feed rollers 2, the pair of second feed rollers 3 disposed downstream of the first feed rollers 2, a heater 4 in the form of a contact-type heater for heating the untreated nylon yarn 1' fed from the second feed rollers 3, a false twisting means 5 for imparting a twist to the yarn 1' for crimping treatment thereof, the pair of delivery rollers 6 disposed downstream of the false twisting means 5, and a winding means 7 for winding up the crimped yarn 1" delivered from the delivery rollers 6.
  • Figure 5 shows another conventional false twisting machine of in-drawing type for partially drawn yarns (P.D.Y.) and fully drawn yarns (F.D.Y.).
  • This machine has only one pair of feed rollers 3 and is adapted to draw a yarn only between the feed rollers 3 and a pair of delivery rollers 6.
  • the construction of this in-drawing type machine is similar to that of the out-drawing type machine as illustrated in Figure 4 except for the first feed rollers 2 being omitted.
  • a fully drawn nylon yarn (F.D.Y.) was likewise subjected to a false twisting treatment by means of the in-drawing type machine as illustrated in Figure 5.
  • the yarns treated in this manner were respectively knitted into fabrics by the use of a lab circular knitting machine which had a cylinder diameter of 3.5 inches and 240 needles.
  • the elasticities of the respective fabrics thus obtained were measured in the following manner. where L 1 is the length of a fabric in a minute after a measuring load is applied to the fabric of a measuring length.
  • Examples 1 and 2 relate to a nylon yarn of 15 denier (De) including 5 filaments and a nylon yarn of 35 De including 10 filaments, respectively.
  • the test results thereof are shown in Tables 1 and 2 and in Figures 6 and 7.
  • a partially drawn nylon yarn (P.D.Y.) of 70 De including 24 filaments and a fully drawn yarn (F.D.Y.) of the same size were false twisted by the in-drawing type false twisting machine as illustrated in Figure 5, and the elasticities thereof were measured.
  • the results obtained are shown in Table 3 and in Figure 8.
  • the undrawn nylon yarns and the partially drawn nylon yarns of 15 De and 35 De have high and stable elasticities of knitted fabrics if the length of the heater is greater than 300 mm, and it is found that false twisted yarns of sufficiently good quality can be obtained even if the heater length is less than 1,000 mm, and particularly less than 800 mm, but greater than 300 mm.
  • the elasticity of knitted fabric thereof is insufficient with the heater length ranging from 300 mm to 800 mm.
  • Table 3 and Figure 8 showing the test results of the Comparison Example it can be seen that with the nylon yarn of 70 De, the elasticity thereof is low if the heater length is less than 800 mm.
  • the temperatures of the yarns were measured at locations I, II and III as illustrated in Figure 9 by means of a temperature detector. The same tests were carried out by varying the feeding speeds of the yarns.
  • the undrawn yarn of a higher drawing rate is higher in temperature than the partially drawn yarn of a lower drawing rate.
  • the temperature of the feed rollers 3 is substantially equal to room temperature, it is inferred that the nylon yarns are cooled during passage thereof through the feed rollers 3.
  • the temperature of a nylon yarns (Free) not twisted after its passage through the feed rollers 3 is compared with that of a nylon yarn (Twist) twisted after its passage through the feed rollers 3, the latter is higher than the former in any of the undrawn yarns, the partially drawn yarns and the fully drawn yarns.
  • the partially out-drawn yarn B is lower in temperature than the partially in-drawn yarn C, which is considered due to the fact that with the in-drawing type false twisting machine, the yarn will presumably be drawn within the heater of high temperature disposed downstream of the location II, and hence the partially in-drawn yarn C is free from the influence of self-heating due to drawing thereof.
  • the length of a heater in the false twisting process of an undrawn nylon yarn or a partially drawn nylon yarn, the length of a heater can be reduced below 1,000 mm, and particularly below 800 mm if it is greater than 300 mm even when the feeding speed of the yarn is over 500 m/min.
  • This provides a remarkable advantage from the viewpoint of minimization in size of a false twisting system.
  • the transmission of a twisting movement is reduced if the yarn is bent at a location between the heater and the false twisting means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (7)

1. Falsch-Draht-Zwirnmaschine mit Zuführwalzen (3), einer Heizeinrichtung (4) und einer Falsch-Draht-Zwirn-Einrichtung (5), die in der Vorlaufrichtung eines Fadens im wesentlichen in einer geraden Linie aufeinanderfolgend angeordnet sind, wobei die Länge der Heizeinrichtung (4) mehr als 300 mm und weniger als 1000 mm beträgt, dadurch gekennzeichnet, daß der Abstand zwischen den Zuführwalzen (3) und dem stromaufwärts liegenden Ende der Heizeinrichtung (4) weniger als 300 mm beträgt und daß die Zuführgeschwindigkeit des Fadens größer als 500 m/min ist.
2. Falsch-Draht-Zwirnmaschine nach Anspruch 1, dadurch gekennzeichnet, daß ein unverstreckter Nylonfaden von weniger als 50 Denier oder ein teilweise verstreckter Nylonfaden von weniger als 50 Denier einer Falsch-Draht-Zwirn-Bearbeitung unterzogen wird.
3. Falsch-Draht-Zwirnmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Länge der Heizeinrichtung (4) mehr als 300 mm, aber weniger als 800 mm beträgt.
4. Falsch-Draht-Zwirnmaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand zwischen den Zuführwalzen (3) und dem stromaufwärts liegenden Ende der Heizeinrichtung (4) weniger als 200 mm beträgt.
5. Falsch-Draht-Zwirnmaschine nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß stromaufwärts von den Zuführwalzen (3), mit einem Abstand von weniger als 300 mm zu dem stromaufwärts liegenden Ende der Heizeinrichtung (4), weitere Zuführwalzen (2) vorgesehen sind.
6. Falsch-Draht-Zwirn-Verfahren zum Falsch-Draht-Zwirnen eines unverstreckten Fadens oder eines zum Teil verstreckten Fadens mit den Schritten:
Aufeinanderfolgendes Anordnen von Zuführwalzen (3), einer Heizeinrichtung (4) und einer Falsch-Draht-Zwirn-Einrichtung (5) in Vorlaufrichtung des Fadens, im wesentlichen auf einer geraden Linie,
Einstellen der Länge der Heizeinrichtung auf mehr als 300 mm, aber weniger als 1000 mm,
gekennzeichnet durch die weiteren Schritte, einen Nylonfaden von weniger als 50 Denier zu nehmen und die Zuführgeschwindigkeit auf mehr als 500 m/min einzustellen, und den Abstand zwischen den Zuführwalzen (3) und dem stromaufwärts liegenden Ende der Heizeinrichtung (4) auf weniger als 300 mm einzustellen.
7. Falsch-Draht-Zwirn-Verfahren zum Falsch-Draht-Zwirnen eines unverstreckten Fadens oder eines zum Teil verstreckten Fadens mit den Schritten:
Aufeinanderfolgendes Anordnen von ersten Zuführwalzen (3), einer Heizeinrichtung (4) und einer Falsch-Draht-Zwirn-Einrichtung (5) in Vorlaufrichtung des Fadens, im wesentlichen auf einer geraden Linie,
Einstellen der Länge der Heizeinrichtung (4) auf mehr als 300 mm, aber weniger als 1000 mm,
gekennzeichnet durch die weiteren Schritte, einen Nylonfaden von weniger als 50 Denier zu nehmen, die Zuführgeschwindigkeit auf mehr als 500 m/min einzustellen, den Abstand zwischen den ersten Zuführwalzen (3) und dem stromaufwärts liegenden Ende der Heizeinrichtung (4) auf weniger als 300 mm einzustellen, zweite Zuführwalzen (2) stromaufwärts der ersten Zuführwalzen (3) anzuordnen und den Faden zwischen den ersten Zuführwalzen (3) und den zweiten Zuführwalzen (2) zu verstrecken.
EP19870103605 1987-03-12 1987-03-12 Falschdrall-Kräuselmaschine Expired EP0281657B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8787103605T DE3767300D1 (de) 1987-03-12 1987-03-12 Falschdrall-kraeuselmaschine.
EP19870103605 EP0281657B1 (de) 1987-03-12 1987-03-12 Falschdrall-Kräuselmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19870103605 EP0281657B1 (de) 1987-03-12 1987-03-12 Falschdrall-Kräuselmaschine

Publications (2)

Publication Number Publication Date
EP0281657A1 EP0281657A1 (de) 1988-09-14
EP0281657B1 true EP0281657B1 (de) 1991-01-09

Family

ID=8196827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870103605 Expired EP0281657B1 (de) 1987-03-12 1987-03-12 Falschdrall-Kräuselmaschine

Country Status (2)

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EP (1) EP0281657B1 (de)
DE (1) DE3767300D1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1265442B1 (it) * 1993-12-24 1996-11-22 Menegatto Srl Macchina testurizzatrice
JP4060508B2 (ja) * 2000-02-16 2008-03-12 Ｔｍｔマシナリー株式会社 延伸仮撚加工機

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367096A (en) * 1965-06-07 1968-02-06 Alamance Ind Inc Apparatus for false-twisting and plying yarns
US3449898A (en) * 1967-10-10 1969-06-17 Nippon Rayon Kk Heater for yarn twister
US3955351A (en) * 1969-02-06 1976-05-11 Imperial Chemical Industries Inc. Production of bulked yarns
US3956878A (en) * 1974-09-10 1976-05-18 Fiber Industries, Inc. High speed texturing
US4173860A (en) * 1975-03-03 1979-11-13 Mcklveen John R Textured synthetic fiber yarn and process for making same

Also Published As

Publication number Publication date
DE3767300D1 (de) 1991-02-14
EP0281657A1 (de) 1988-09-14

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