US3901015A - Method for cutting continuous yarns - Google Patents

Method for cutting continuous yarns Download PDF

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Publication number
US3901015A
US3901015A US436911A US43691174A US3901015A US 3901015 A US3901015 A US 3901015A US 436911 A US436911 A US 436911A US 43691174 A US43691174 A US 43691174A US 3901015 A US3901015 A US 3901015A
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United States
Prior art keywords
piling
yarn
cutting
cut
pack
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Expired - Lifetime
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US436911A
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English (en)
Inventor
Silvio Sangalli
Roger Vidal
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Rhone Poulenc Textile SA
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Rhone Poulenc Textile SA
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
    • D01G1/02—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form
    • D01G1/04—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form by cutting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00—Cutting
    • Y10S83/913—Filament to staple fiber cutting

Definitions

  • a method for cutting continuous yarn includes compacting the yarninto a tubular piling in which the yarn is randomly curled. The piling is then sliced continuously as it is being formed to obtain a plurality of individual strands. The piling may be cut completely therethrough to form the strands or, on the other hand, may be cut only partially therethrough to form the strands. In either case, since the yarn has been curled randomly before being cut, the distribution of strand length obtained by cutting the piling will be variable.
  • the U.S. Pat. No. 3,530,751 discloses a method in which continuous yarn is formed into a rope which is folded upon itself to form a zig-zag piling with parallel folds in which filaments are disposed parallel to one another.
  • this rope is cut, the fibers obtained have a regular length if the cut is performed periodically but may have various lengths if the cut is performed by varying the number of cutting elements for the lateral position of a single cutting element.
  • the fibers of various lengths are produced, the fibers of identical lengths are packaged together. Accordingly, the distribution of the lengths of the fiber is step-like. This step-like distribution presents problems when the fibers are utilized in the worsted and woolen spinning system. In these spinning system,.
  • a method for practicing the instant invention includes compacting a strand of multifilament yarn into an elongated piling wherein the yarn is distributed in the form of random curls and then cutting the piling to form a plurality of fibers.
  • the instant invention also contemplates either cutting the piling completely therethrough to form the individual fibers or partially therethrough to form the individual fibers.
  • the yarn is entrained in a stream of fluid which injects the yarn into a tube where the piling is formed and from which the piling continuously emerges.
  • the instant invention also contemplates the individual fibers obtained by cutting the piling.
  • FIG. 1 is a perspective view of an apparatus for practicing a method according to the instant invention wherein a piling of yarn is generated in a tube and is sliced by a blade as it emerges from the tube;
  • FIG. 2 is a side view partially in section showing a second embodiment of apparatus for practicing a method of the instant invention wherein a rotating cutting blade is positioned within the tube which forms the pilings;
  • FIG. 3 is a third embodiment of apparatus for performing the method according to the instant invention wherein a rotating cutting blade is positioned downstream from the tube which forms the piling.
  • FIG. 1 there is shown a cylindrical piling, designated generally by the numeral 10, which is composed of either a single strand or a plurality of strands of multiflament yarn 11.
  • the piling 10 is formed in a tube 12 as the strand or strands 1 l are fed into the tube 12 by an entraining stream of air that surrounds the strand or strands 11 in an ejector nozzle 14 located at the downstream end 15 of the tube 12.
  • the fluid stream expands in the tube 12, it exits through lateral openings 16 formed in the periphery of the tube.
  • the strand 11 is advanced to the nozzle 14 as it is produced by a spinning, extrusion or other process schematically illustrated as the box 18.
  • piling is meant to define a process in which a strand of yarn is compacted in a curved flexible form.
  • the piling is made of lay ers of yarn which are individually curved in a random manner and which are not adhered or otherwise attached together.
  • the curled yarn forms convolutions which are not necessarily folded in the same plane nor are necessarily parallel or in zig-zag relationship to one another.
  • the fluid which is used to entrain and inject the yarn 11 into the tube 12 may be inert with relation to the yarn and perform no process or operation thereon or may include substances such as dyes or other chemicals which will react in some way with the yarn 11.
  • Devices for forming such pilings are illustrated in US. Pat. Nos. 3,373,470; 3644969; 3703754; 3751778.
  • the piling 10 can be made of either one or several artificial yarns 11.
  • the yarns 11 may be twisted or not twisted or may either be dyed or not dyed.
  • the yarns 1 1, when a plurality of yarns are used, may all be identical or they may be different and the diameter of the piling 10 may be any convenient dimension.
  • the yarn utilized in practicing the method of the instant invention may therefore be of any convenient nature or configuration.
  • the piling l As seen in FIG. 1, as the piling l emerges from a downstream end 20 of the tube 12, it is cut by a stationary blade 21 which is positioned between a pair of rollers 22 and 23 which align the piling 10 with the blade 21.
  • the blade 21 may either cut completely through the piling 10, as shown in FIG. 1, or may cut partially through the piling 10.
  • the strand or strands 11 are separated into a plurality of individual fibers. Since the strand 11 is randomly curled within the piling 10, the individual fibers will be of unequal lengths. Variations in the depth of cut may be achieved by mounting the blade 21 in a slide 25 which permits the blade to move normally with respect to the longitudinal axis of the piling 10.
  • the blade 21 is positioned so as to cut completely through the piling 10.
  • the fibers will have a length between 35- 350 mm which is a distribution similar to that of wool and which, when processed in the same manner as wool, will produce textile materials having threads of a wool-like configuration.
  • the blade 21 thus cuts the piling 10 as the yarn 11 is produced. Since the tube 12 in effect distributes the yarn in three dimensions instead of two, yarn arriving at the nozzle 14 with a velocity of 300 3000 meters per minute is slowed in its direction of advance to a speed of 150 meters per minute. This reduced speed enables the blade 21 to cut the yarn 1 l at a slower velocity but higher density, which facilitates cutting the yarn. Since the yarn 11 is layered within the piling in a progression of convoluted curls, the yarn will not fly off in all directions as it is severed but will, rather, hold its configuration until after it passes between the rollers 22 and 23 and over the blade 21.
  • the resulting fibers can be collected in a container (not shown) or pneumatically transported by suitable means (not shown) to a storage bin (not shown) or the like. If desired, the fibers can be transported to a press (not shown) or perhaps to an opener (not shown) which separates the fibers by opening the two halves 10a and 10b of the piling. If the two halves, 10a and 10b, are opened to separate the fibers, the fibers may then be fed to an assembly for making layers (not shown) or else to a device (not shown) for making fiber threads. If the piling 10 is only partially cut, the piling can be collected into a bin (not shown) or be wound upon a spindle (not shown).
  • FIGS. 2 and 3 instead of using a stationary blade such as the blade 21 of FIG. 1, it is possible to use a rotating blade such as the blade 31 of FIGS. 2 and 3.
  • the rotating blade has the advantage of continuously passing through more than one station. Consequently, the blade 31 may be sharpened by a sharpener schematically shown by the numeral 33 as it I severs or cuts the piling 10. This obviates the disadvantage of having to remove the blade periodically for sharpening as must be done with the blade 21 of FIG. 1.
  • the rotating blade 31 is shown positioned within a slot 34 in the tube 12 and downstream of the rollers, respectively. This is done to illustrate the flexibility and numerous approaches which may be utilized in practicing the method of the instant invention.
  • the piling 10 is kept compacted by the tube 12 as it is severed by the rotating cutter 31 whereas in FIG. 3 the bias of the piling 10, due to the elasticity thereof, urges it between the cutter 31 and lower roller 23.
  • the cutting means 31- and 21 may be placed intermittently in contact with the piling by withdrawing and advancing the cutters as the piling is advanced.
  • the profiles of the cutters may be varied to advance or retard the cutting with respect to the depth at which the cutters slice.
  • the illustrated embodiment utilizes rollers 22 and 23, it is also possible to use a pair of conveyor belts in order to advance the pi]- ing 10.
  • the resulting fibers are either twisted immediately in a continuous process or are collected and twisted later to form threads.
  • the resulting thread contains fibers which are cut and uncut. This gives the thread a greater breaking resistance than that of other types of fiber threads in which all of the fibers are cut. It is possible to draw the fibers of the piling when the piling is partially cut to obtain, upon twisting the fibers, a yarn with a relatively high count from fibers having relatively fine counts.
  • EXAMPLE 1 Polyhexamethylene adipamide yarn having a count of 2300 dtx/ 136 strands of tetralobed section is produced by a spinning and drawing device and fed continuously at 1100 meters per minute to a pneumtic texturizing unit as described in US. Pat. No. 3751778.
  • the diameter of the tube into which the yarn is fed is 10 mm which produces a piling having a diameter of 10 mm.
  • the piling Upon emerging from the tube, the piling passes between two rollers having a peripheral speed of 12.5 meters per minute and then engages a rotary blade similar to that shown in FIG. 3 which rotates 25 rpm. The blade penetrates the piling to a depth of 4 mm and cuts the piling into fibers having lengths in the range of 60 to 100 mm.
  • Viscose yarn having a count of 330 dtx/120 strands is fed from a spool at a rate of 400 meters per minute to a pneumatic texturizing device similar to that of US. Patent 3,703,756.
  • the diameter of the tube in the texturizing device and the resulting piling is 4 mm.
  • the piling While in the tube, the piling is engaged by a rotating blade which penetrates 2 mm into the piling as it rotates at 25 rpm.
  • the piling then passes between a pair of rollers having a peripheral speed of 9.8 meters per minute and the fibers obtained after opening the piling have a length in the range of 20 30 mm.
  • EXAMPLE 3 Two ethylene glycol polyterephthalate yarns having a count of 167 dtx/30 strands which are untwisted are fed at a rate of 800 meters per minute to a device as described U.S. Pat. No. 3703754 to produce a piling having a diameter of 4 mm. The resulting piling passes between two rollers having a peripheral speed of 18.9 meters per minute and is then cut as follows:
  • EXAMPLE 4 Polyhexamethylene adipamide yarn having a count of 2300 dtx/ 136 strands of tetralobed section produced by a spinning-drawing device is fed at a rate of 1100 meters per minute to a pneumatic texturizing unit such as that described in US. Pat. No. 3,751,778 to produce a piling having a diameter of 10 mm.
  • the resulting piling passes between two rollers having a peripheral speed of 12.5 meters per minute and then comes into engagement with a stationary blade placed parallel to its axis which penetrates the piling to a depth of 2 mm.
  • the partially cut piling is then wound on a spool at a speed of 930 meters per minute and twisted at a rate of 40 turns per meter to obtain a thread-type product utilized in the fabrication of fabrics.
  • a method of cutting continuous multifilament yarns comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US436911A 1973-02-08 1974-01-28 Method for cutting continuous yarns Expired - Lifetime US3901015A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7305089A FR2217441B1 (nl) 1973-02-08 1973-02-08

Publications (1)

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US3901015A true US3901015A (en) 1975-08-26

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US436911A Expired - Lifetime US3901015A (en) 1973-02-08 1974-01-28 Method for cutting continuous yarns

Country Status (13)

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US (1) US3901015A (nl)
JP (1) JPS5638689B2 (nl)
AR (1) AR201680A1 (nl)
BE (1) BE810747A (nl)
BR (1) BR7400784D0 (nl)
CH (1) CH612555B (nl)
DE (1) DE2406177C2 (nl)
ES (1) ES423055A1 (nl)
FR (1) FR2217441B1 (nl)
GB (1) GB1466397A (nl)
IT (1) IT1002859B (nl)
LU (1) LU69351A1 (nl)
NL (1) NL175737C (nl)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988882A (en) * 1974-06-10 1976-11-02 Rhone-Poulenc-Textile Method and apparatus for simultaneously texturizing and cutting continuous yarns
US6220135B1 (en) * 1996-12-02 2001-04-24 Nextrom Holding S.A. Arrangement in connection with a fibre process
US6381941B1 (en) * 1998-07-24 2002-05-07 Zellweger Luwa Ag Capacitor charged yarn cutting apparatus
US20060145015A1 (en) * 2004-11-10 2006-07-06 Atair Aerospace, Inc. Non-pyrotechnic parachute loop cutter

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384450A (en) 1979-08-13 1983-05-24 Celanese Corporation Mixed fiber length yarn
US4466237A (en) * 1980-12-16 1984-08-21 Celanese Corporation Mixed fiber length yarn
JPH0211931U (nl) * 1988-07-04 1990-01-25
US10836492B2 (en) 2017-03-30 2020-11-17 Itt Manufacturing Enterprises Llc Load adaptive lift assist for pivoting stowage bin

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777519A (en) * 1952-12-03 1957-01-15 Ici Ltd Apparatus for cutting continuous filaments into short lengths
US3050928A (en) * 1959-08-18 1962-08-28 Sumner Company Inc Converting continuous filament to staple fiber
US3241195A (en) * 1963-10-10 1966-03-22 Monsanto Co Staple fiber cutter and crimper
US3373470A (en) * 1961-02-08 1968-03-19 Rhodiaceta Process for crimping yarn
US3530751A (en) * 1968-03-12 1970-09-29 Maremont Corp Apparatus for cutting tow
US3606655A (en) * 1968-10-09 1971-09-21 Siegfried Oberlander Process and apparatus for the continuous tension-free fixing and shrinking of cables of uncrimped filaments
US3751778A (en) * 1970-10-14 1973-08-14 Rhodiaceta Process for the simultaneous texturing and dyeing or finishing of thermoplastic yarns

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530751A (en) * 1947-07-28 1950-11-21 Gladys H Bucklin Primary cell
FR1289491A (fr) * 1961-02-08 1962-04-06 Rhodiaceta Procédé pour le frisage de fils thermoplastiques, dispositif pour sa mise en oeuvre et nouveaux fils obtenus
DE1230519B (de) * 1962-05-26 1966-12-15 Sumner Company Inc Verfahren und Vorrichtung zur Herstellung von Stapelfasern
NL134479C (nl) * 1966-06-28
FR2052161A5 (nl) * 1969-07-24 1971-04-09 Rhodiaceta
FR2109421A5 (en) * 1970-10-14 1972-05-26 Rhodiaceta Dyeing and crimping yarn simultaneously - by compressing into a plug and dyeing the plug

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777519A (en) * 1952-12-03 1957-01-15 Ici Ltd Apparatus for cutting continuous filaments into short lengths
US3050928A (en) * 1959-08-18 1962-08-28 Sumner Company Inc Converting continuous filament to staple fiber
US3373470A (en) * 1961-02-08 1968-03-19 Rhodiaceta Process for crimping yarn
US3241195A (en) * 1963-10-10 1966-03-22 Monsanto Co Staple fiber cutter and crimper
US3530751A (en) * 1968-03-12 1970-09-29 Maremont Corp Apparatus for cutting tow
US3606655A (en) * 1968-10-09 1971-09-21 Siegfried Oberlander Process and apparatus for the continuous tension-free fixing and shrinking of cables of uncrimped filaments
US3751778A (en) * 1970-10-14 1973-08-14 Rhodiaceta Process for the simultaneous texturing and dyeing or finishing of thermoplastic yarns

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988882A (en) * 1974-06-10 1976-11-02 Rhone-Poulenc-Textile Method and apparatus for simultaneously texturizing and cutting continuous yarns
US6220135B1 (en) * 1996-12-02 2001-04-24 Nextrom Holding S.A. Arrangement in connection with a fibre process
US6381941B1 (en) * 1998-07-24 2002-05-07 Zellweger Luwa Ag Capacitor charged yarn cutting apparatus
US20060145015A1 (en) * 2004-11-10 2006-07-06 Atair Aerospace, Inc. Non-pyrotechnic parachute loop cutter

Also Published As

Publication number Publication date
FR2217441B1 (nl) 1975-03-07
NL7400800A (nl) 1974-08-12
GB1466397A (en) 1977-03-09
JPS5638689B2 (nl) 1981-09-08
AR201680A1 (es) 1975-04-08
CH612555GA3 (nl) 1979-08-15
DE2406177C2 (de) 1983-10-27
JPS49134929A (nl) 1974-12-25
DE2406177A1 (de) 1974-08-15
BR7400784D0 (pt) 1974-11-05
IT1002859B (it) 1976-05-20
NL175737C (nl) 1984-12-17
LU69351A1 (nl) 1974-05-17
ES423055A1 (es) 1976-04-16
NL175737B (nl) 1984-07-16
BE810747A (fr) 1974-08-07
CH612555B (fr)
FR2217441A1 (nl) 1974-09-06

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