US3277641A - Drawing of synthetic filaments - Google Patents

Drawing of synthetic filaments Download PDF

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Publication number
US3277641A
US3277641A US227093A US22709362A US3277641A US 3277641 A US3277641 A US 3277641A US 227093 A US227093 A US 227093A US 22709362 A US22709362 A US 22709362A US 3277641 A US3277641 A US 3277641A
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US
United States
Prior art keywords
filament
filaments
positions
machine
draw
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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US227093A
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English (en)
Inventor
O'donahue James
Cochrane Thomas
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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
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Publication of US3277641A publication Critical patent/US3277641A/en
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    • 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
    • D02J1/225—Mechanical characteristics of stretching apparatus

Definitions

  • the present invention relates to improvements in the drawing of synthetic filaments and to an improved drawtwisting machine used for this purpose.
  • the filaments which have been processed in this way are usually collected on a package such as a bobbin which is usually driven from the same common driving source, there being one package or bobbin for each combination of heated feed roll and draw roll.
  • a package such as a bobbin which is usually driven from the same common driving source, there being one package or bobbin for each combination of heated feed roll and draw roll.
  • the combination of one heated feed roll, a draw roll and one packaging device forms one position on the machine, and the machines are commonly built with over 100 such positions.
  • the present invention we provide, in a process for drawing synthetic filaments by means of a draw- States atent ice twister in which a multiplicity of posit-ions each comprising a heated feed roll, a draw roll and a packaging unit are driven from a common source, the improvement whereby the heated feed rolls, draw rolls and packaging units are made to rotate slowly at a crawl during the string-up operation.
  • our invention further provides a drawtwister wherein a conventional primary source of power such as an electric motor drives, through gearing or other form of power transmission, a number of positions each comprising a heated feed roll, a draw roll and a packaging unit, characterised by the provision of a secondary, smaller source of power connected by a free-wheel coupling to the main gearing or other form of power transmission which enables the machine to be driven at a very low speed.
  • the smaller power source may conveniently consist of a small horse power electric motor incorporating a reduction gear in its output shaft.
  • the introduction of the small pony motor enables the drawtwister to be driven at speeds of the order of or 5 of its normal speed and this may be done for as long as is required for stringing-up, generally some five to ten minutes.
  • the primary source of power is energised which accelerates the machine to its full operational speed, the connection to the secondary source of power being inoperative due to the action of the free wheel or over-run coupling which permits that half of the coupling normally designated the driven half to run at a faster speed than the driving half.
  • the secondary source of power may be de-energised at will, either manually or automatically.
  • FIG. 1 shows the essential parts of one position of a drawtwister comprising a heated feed roll 1, a draw roll 2, a heated plate 3 and a packaging unit 4.
  • a secondary driving motor 5 is coupled into the main drive from the primary driving motor 6 by means of a free wheel" coupling 7 so that the feed and draw rolls 1 and 2 and the packaging unit 4 may be driven slowly while the yarn to be drawn 8 is taken from the starting package 9 and lead around the rolls over the heated plate to the packaging unit.
  • the primary driving motor 6 is energized and the secondary motor 5 becomes inoperative due to overrunning of the free-wheel coupling 7.
  • a drawtwister of positions each comprising a heated feed roll, a draw roll, a heated plate and a packaging unit was provided with a primary power source of a 40 horse-power electric motor and a secondary driving motor of 1.5 horse-power coupled into the main gearing drive so that during the stringing-up operation the surface speed of the heated feed roll was about 5 feet/minute.
  • This machine was used to draw polyethylene terephthalate filament yarn having a drawn denier of 50 at .an operating draw roll surface speed of 2,360 feet/minute and a packaging spindle speed of 10,250 r.p.m.
  • the process and apparatus of our invention may be used for synthetic filaments in general, but have been found of particular value in processing filaments of polyesters and copolyesters, e.g. those of terephthalic acid with ethylene glycol or 1,4-cyclohexane dimethanol, polyamides and polyolefines, e.g. stereoregular polypropylene.
  • polyesters and copolyesters e.g. those of terephthalic acid with ethylene glycol or 1,4-cyclohexane dimethanol
  • polyamides and polyolefines e.g. stereoregular polypropylene.
  • a method of operating a drawtwister so as to obtain appnoximately equal lengths of filaments on a multiplicity of packages said drawtwister being of the kind having a multiplicity of positions each of which includes a heated feed roll, a draw roll and a packaging unit all driven at a high operating speed during drawtwisting by a common source, said method comprising: sequentially stringing-up at least some of said positions by stringing a filament over an associated feed and draw roll and to the respective packaging unit; driving said feed rolls, draw rolls and packaging units at a slow speed of to 5 of said high operating speed during the stringingup operation to thereby reduce the heating of a strung-up filament by its respective feed roll while subsequent positions are being strung up and to thereby reduce the tendency of the first-strung filaments to break at startup of a drawtwisting operation; thereafter simultaneously accelerating all said feed rolls, draw rolls and packaging units to said high operating speed thereby stretching and twisting said filaments; and then stopping all said feed rolls, draw rolls and packaging units at

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US227093A 1961-09-28 1962-09-28 Drawing of synthetic filaments Expired - Lifetime US3277641A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34888/61A GB955742A (en) 1961-09-28 1961-09-28 Drawing of synthetic filaments

Publications (1)

Publication Number Publication Date
US3277641A true US3277641A (en) 1966-10-11

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ID=10371153

Family Applications (1)

Application Number Title Priority Date Filing Date
US227093A Expired - Lifetime US3277641A (en) 1961-09-28 1962-09-28 Drawing of synthetic filaments

Country Status (4)

Country Link
US (1) US3277641A (en:Method)
BE (1) BE622968A (en:Method)
GB (1) GB955742A (en:Method)
NL (1) NL283635A (en:Method)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328951A (en) * 1965-04-01 1967-07-04 Monsanto Co Drawing and packaging nylon filament yarn
US3358433A (en) * 1965-10-01 1967-12-19 Ici Ltd Collection of synthetic polymeric yarns or filaments
US3382663A (en) * 1964-12-22 1968-05-14 Shell Oil Co Manufacture of fibrillated strands

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1965163A (en) * 1933-05-11 1934-07-03 Whitin Machine Works Two speed drive for spinning frames
US1984810A (en) * 1933-11-14 1934-12-18 Robertson Robert Machine for operating on textile threads
US2336100A (en) * 1937-11-04 1943-12-07 Gen Aniline & Film Corp Process of producing twists of organic thermoplastic material
US2956330A (en) * 1957-05-23 1960-10-18 Du Pont Stabilized yarn
US2988866A (en) * 1957-05-08 1961-06-20 Glanzstoff Ag Apparatus for the production of lowshrinkage polyethylene terephthalate threads
US3009308A (en) * 1960-03-10 1961-11-21 Chemstrand Corp Drawtwisting machinery
US3018608A (en) * 1957-05-08 1962-01-30 Glanzstoff Ag Process for the production of lowshrinkage polyethylene terephthalate threads
US3025660A (en) * 1957-01-24 1962-03-20 American Enka Corp Drawtwisting process
US3166822A (en) * 1960-04-26 1965-01-26 English Rose Ltd Method and apparatus for production of bulked yarn

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1965163A (en) * 1933-05-11 1934-07-03 Whitin Machine Works Two speed drive for spinning frames
US1984810A (en) * 1933-11-14 1934-12-18 Robertson Robert Machine for operating on textile threads
US2336100A (en) * 1937-11-04 1943-12-07 Gen Aniline & Film Corp Process of producing twists of organic thermoplastic material
US3025660A (en) * 1957-01-24 1962-03-20 American Enka Corp Drawtwisting process
US2988866A (en) * 1957-05-08 1961-06-20 Glanzstoff Ag Apparatus for the production of lowshrinkage polyethylene terephthalate threads
US3018608A (en) * 1957-05-08 1962-01-30 Glanzstoff Ag Process for the production of lowshrinkage polyethylene terephthalate threads
US2956330A (en) * 1957-05-23 1960-10-18 Du Pont Stabilized yarn
US3009308A (en) * 1960-03-10 1961-11-21 Chemstrand Corp Drawtwisting machinery
US3166822A (en) * 1960-04-26 1965-01-26 English Rose Ltd Method and apparatus for production of bulked yarn

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3382663A (en) * 1964-12-22 1968-05-14 Shell Oil Co Manufacture of fibrillated strands
US3328951A (en) * 1965-04-01 1967-07-04 Monsanto Co Drawing and packaging nylon filament yarn
US3358433A (en) * 1965-10-01 1967-12-19 Ici Ltd Collection of synthetic polymeric yarns or filaments

Also Published As

Publication number Publication date
NL283635A (en:Method)
BE622968A (en:Method)
GB955742A (en) 1964-04-22

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