US3766614A - Apparatus for drawing filaments - Google Patents

Apparatus for drawing filaments Download PDF

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Publication number
US3766614A
US3766614A US00177695A US3766614DA US3766614A US 3766614 A US3766614 A US 3766614A US 00177695 A US00177695 A US 00177695A US 3766614D A US3766614D A US 3766614DA US 3766614 A US3766614 A US 3766614A
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US
United States
Prior art keywords
rolls
roll
filament
advancing
rotors
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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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US00177695A
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English (en)
Inventor
R Coats
J Greenway
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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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Filing date
Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
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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

  • ABSTRACT Apparatus for continuously drawing a filament comprising a filament advancing roll adapted for rotation under the speed controlling influence of a motor and a plurality of other rolls each adapted for rotation under the speed controlling influence of surface contact with the advancing filament before it reaches the advancing roll at least two of such plurality of rolls being coupled for rotation at a predetermined surface speed ratio corresponding to a required draw ratio.
  • Apparatus for drawing a continuously advan cingfilament between rolls which are motor driven at different controlled speeds. It is known -to construct multiposition machines with long rotors, each rotor having along its length a number of spacedrollsections so that a number of filaments orbundles of filaments may be advanced separatelyand simultaneously one on each roll section. To preventslip, idler rolls have been provided'whereby' alplurality of short arcs of contact may be created 'betweenfilament and roll.
  • An advantage of long rotors is the relative simplicity ofthe prime movers'and gear boxes provided to drive them.
  • apparatus'for continuously-drawing a' filament comprising'a filament advancing roll adapted for rotation under the speed controlling influence, of a motor, andla plurality of other rolls, each adapted for rotation underthe speed controlling influence of surface contact with the advancing filament before it reaches the advancing roll, at least two of suchplurality of rolls being coupled for rotation at a predetermined surface speed ratio corresponding to -a required vdraw ratio.
  • coupled rolls perform the functions of feedand draw rolls and may be associated with any known drawing means such as heaters or snubbing means.
  • the apparatus may provide for multistage drawing.
  • the coupled rolls are sections ofastepped rotor so thatthe surface speed ratio of therollsections-are determinedby theirdi'ameter ratios.
  • T haul off tension between draw roll and advancing roll T draw tension between feed and draw rolls T feed tensionbefore feed roll R draw ratio I X is a term dependent on the work done against rotor bearing friction Y is a term dependent on rotor windage.
  • Apparatus according to this invention is therefore suited for use in multiposition machines for drawing a plurality of similar filament yarns separately and simultaneously, since the absence of positive roll drives does not introduce unacceptable variability between positions.
  • Apparatus according to the invention also has the outstanding advantages in such applications of being much simpler, lighter, and morecompact than conventional apparatus for the same purpose, since only the advancing rolls need to be driven by an external power source and these may even be a necessary part of a package winding means. Furthermore since the feed and drawrolls need no external driving means, they may be mounted on bearings withinheated enclosures, with consequent minimisation of heat losses.
  • Apparatus according to this invention is also particularly suitable for use in association with filament supply means which do not .deliver a filament at predetermined speed.
  • a filament may be withdrawn from a bobbin or other package by the advancing roll and no driven feed roll is needed.
  • Drawing apparatus according to this invention is therefore particularly suitable for association with filament extrusion apparatus to provide for integrated spin-draw. In such an association no external driving means are needed for any machine element between the extrusion pump and the package winding mechanism.
  • One preferred form of apparatus according to this invention comprises a pair of single stepped rotors each with a feed roll and a draw roll section, having equal feed and draw roll section diameter ratios, and having relatively skewed axes of rotation.
  • stepped rotors each with a feed roll and a draw roll section, having equal feed and draw roll section diameter ratios, and having relatively skewed axes of rotation.
  • rolls may be coupled for rotation at predetermined speed ratios by gears, toothed belts or similar known means. These alternative forms may be preferable for use with heavy tows of filaments.
  • FIG. 1 is a front view of a drawing apparatus according to the invention.
  • FIG. 2 is a side view of the apparatus of FIG. 1.
  • FIG. 3 is a side view of an alternative drawing apparatus according to the invention.
  • FIG. 4 is a front view of an apparatus for drawing and relaxing according to the invention.
  • FIG. 5 is a side view of a multistage drawing apparatus according to the invention with its cover partly cut away.
  • FIG. 6 is a section on the line VI of FIG. 5, and
  • FIG. 7 is a section on the line VII of FIG. 5.
  • a continuous filament 1 passes from a supply means not shown to an advancing roll 2 driven by means not shown against which it is held in contact without slip by a nip roll 3 held under pressure against roll 2 by conventional means not shown.
  • An idler roll spaced apart from and skewed with respect to the advancing roll 2 may be used instead of the nip roll 3.
  • Two rolls 4 and 5 are mounted for free rotation but coupled by gears 6 and 7.
  • Two further rolls 8 and 9 are mounted for free rotation with axes slightly skewed with respect to the axes of rolls 4 and 5 respectively.
  • a steam heated enclosure 10 is provided between rolls 8 and 9.
  • a filament issuing from the supply means is passed through the nip between rolls 2 and 3, passed a number of times round the pair of rolls 5 and 9, entered through the heated enclosure 10, and then passed a number of times round the pair of rolls 4 and 8.
  • the filament advancing under the influence of roll 2 causes rolls 4, 5, 8 and 9 to rotate and is thereby caused to draw in the heated enclosure to a ratio dictated by the gear ratio between gears 6 and 7.
  • a pair of relatively skewed rotors l1 and 12 have feed roll sections 111 and 121 and draw roll sections 112' and 122. The ratios of the diameters of sections 112 and 122 to 111 and 121 are equal.
  • a heated enclosure 13 is provided between rotors l1 and 12 and there is also an advancing roll 14 and nip roll 15 similar to rolls 2 and 3 of FIG. 1.
  • a filament 16 issuing from supply means not shown is entered into the nip rolls 14 and 15, passed a number of times round rolls 112 and 122, entered through the enclosure 13 and passed a number of times round rolls 111 and 121.
  • the apparatus then functions as that of FIG. 1.
  • FIG. 4 illustrates apparatus for drawing and relaxing.
  • a first rotor 20 comprises a feed roll section 201 and a draw roll section 202.
  • a second rotor 21 comprises a draw rollsection 2l1'and a relax roll section 212.
  • a separate feed roll 22 and relax roll 23 are provided adjacent rotors 20 and 21 respectively and a forwarding roll and nip roll 24 and 25 similar to rolls 2 and 3 of FIG. 1 are provided adjacent roll 23.
  • Heated enclosures may be provided for drawing and relaxing or the rolls may be heated or mounted within a heated enclosure.
  • a triple stepped rotor development of the apparatus of FIG. 3 will provide for two stage drawing.
  • FIGS. 5, 6 and 7 illustrate a multistage drawing apparatus.
  • a closely spaced pair of self threadable parallel grooved rotors 31 and 32 according to our copending application 13357/ have varying groove depths to provide feed roll sections 311 and 321 at the back end of the rotors, intermediate roll sections 312 and 322, and draw roll sections 313 and 323 at the nose of the rotors.
  • the rotors are freely rotatable in bearings 33 and 34, mounted in an enclosure 35 with a door 36 string up slots 37 and 38 and heated by means not shown.
  • the apparatus comprises also a motor driven advancing roll system not shown which is similar to rolls 2 and 3 of FIG. 1.
  • a filament 39A issuing in the direction of the arrow from supply means not shown to advancing means not shown is engaged in the back groove of rotor 32 and then threaded on multiple figure of eight loops round the noses of the rotors. The advancing filament then migrates back along the rotors and threads itself into adjacent grooves.
  • Apparatus for continuously drawing a filament comprising a filament advancing roll adapted for rotation under the speed controlling influence of a motor and a plurality of other rolls each adapted for rotation under the speed controlling influence of surface contact with the advancing filament before it reaches the advancing roll, at least two of such plurality of rolls being coupled for rotation at a predetermined surface speed ratio corresponding to a required draw ratio.
  • Apparatus according to claim 1 wherein at least one of said other rolls is a rotor with roll sections of different diameters.
  • Apparatus according to claim 2 comprising a pair of similar rotors having relatively skewed axes of rotation.
  • Apparatus according to claim 2 comprising a pair of grooved rolls closely spaced for self threadability and with grooves of different diameters to provide for drawing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US00177695A 1970-09-03 1971-09-03 Apparatus for drawing filaments Expired - Lifetime US3766614A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4222370 1970-09-03

Publications (1)

Publication Number Publication Date
US3766614A true US3766614A (en) 1973-10-23

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ID=10423401

Family Applications (1)

Application Number Title Priority Date Filing Date
US00177695A Expired - Lifetime US3766614A (en) 1970-09-03 1971-09-03 Apparatus for drawing filaments

Country Status (6)

Country Link
US (1) US3766614A (de)
AU (1) AU466305B2 (de)
CH (1) CH539690A (de)
DE (1) DE2144282A1 (de)
FR (1) FR2107202A5 (de)
GB (1) GB1305758A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825517A (en) * 1984-11-15 1989-05-02 Phillips Petroleum Company Apparatus for drawing and interlacing
WO1989010831A1 (en) * 1988-05-09 1989-11-16 Sussman Martin V Improved method and apparatus for incrementally drawing fibers
US4980957A (en) * 1988-05-09 1991-01-01 Sussman Martin V Improved method of incremently drawing fibers
US5136763A (en) * 1990-12-18 1992-08-11 E. I. Du Pont De Nemours And Company Process for the production of uniform yarns via reduced tension-induced slippage
US6115893A (en) * 1996-12-20 2000-09-12 Rhodia Filtec Ag Process and device for producing industrial polyester yarn
US6375882B1 (en) * 1996-11-27 2002-04-23 E. I. Du Pont De Nemours And Company Spinning machine and conversion process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112226868A (zh) * 2020-10-12 2021-01-15 江门市粤新化纤有限公司 一种化纤生产用高稳定性牵拉装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455173A (en) * 1946-05-25 1948-11-30 Du Pont Yarn treating apparatus
US3159964A (en) * 1960-01-12 1964-12-08 Hoechst Ag Process for working up stretched filaments of aromatic polyesters of high molecular weight
US3471608A (en) * 1966-08-09 1969-10-07 Barmag Barmer Maschf Process for the heated drawing and fixation of filaments
US3623311A (en) * 1969-11-03 1971-11-30 Turbo Machine Co Apparatus for producing synthetic torque yarns

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455173A (en) * 1946-05-25 1948-11-30 Du Pont Yarn treating apparatus
US3159964A (en) * 1960-01-12 1964-12-08 Hoechst Ag Process for working up stretched filaments of aromatic polyesters of high molecular weight
US3471608A (en) * 1966-08-09 1969-10-07 Barmag Barmer Maschf Process for the heated drawing and fixation of filaments
US3623311A (en) * 1969-11-03 1971-11-30 Turbo Machine Co Apparatus for producing synthetic torque yarns

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825517A (en) * 1984-11-15 1989-05-02 Phillips Petroleum Company Apparatus for drawing and interlacing
WO1989010831A1 (en) * 1988-05-09 1989-11-16 Sussman Martin V Improved method and apparatus for incrementally drawing fibers
US4891872A (en) * 1988-05-09 1990-01-09 Sussman Martin V Apparatus for incrementally drawing fibers
US4980957A (en) * 1988-05-09 1991-01-01 Sussman Martin V Improved method of incremently drawing fibers
US5339503A (en) * 1988-05-09 1994-08-23 Sussman Martin V Method and apparatus for incrementally drawing fibers
US5136763A (en) * 1990-12-18 1992-08-11 E. I. Du Pont De Nemours And Company Process for the production of uniform yarns via reduced tension-induced slippage
US6375882B1 (en) * 1996-11-27 2002-04-23 E. I. Du Pont De Nemours And Company Spinning machine and conversion process
US6115893A (en) * 1996-12-20 2000-09-12 Rhodia Filtec Ag Process and device for producing industrial polyester yarn

Also Published As

Publication number Publication date
CH539690A (de) 1973-07-31
GB1305758A (de) 1973-02-07
AU3300171A (en) 1973-03-08
AU466305B2 (en) 1975-10-23
FR2107202A5 (de) 1972-05-05
DE2144282A1 (de) 1972-03-09

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