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US2778058A - Filament stretching apparatus - Google Patents

Filament stretching apparatus Download PDF

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Publication number
US2778058A
US2778058A US178802A US17880250A US2778058A US 2778058 A US2778058 A US 2778058A US 178802 A US178802 A US 178802A US 17880250 A US17880250 A US 17880250A US 2778058 A US2778058 A US 2778058A
Authority
US
United States
Prior art keywords
thread
stretching
stretched
pins
holder
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
Application number
US178802A
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English (en)
Inventor
Gabler Rudolf
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.)
Inventa AG fuer Forschung und Patentverwertung
Original Assignee
Inventa AG fuer Forschung und Patentverwertung
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 Inventa AG fuer Forschung und Patentverwertung filed Critical Inventa AG fuer Forschung und Patentverwertung
Application granted granted Critical
Publication of US2778058A publication Critical patent/US2778058A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • D02J1/226—Surface characteristics of guiding or stretching organs
    • 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
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/73—Processes of stretching
    • 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
    • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
    • Y10S8/21—Nylon

Definitions

  • a thread rapidly stretched for more than as heretofore described is obviously strained to the limit of its mechanical resistance and subjected to thread and fiber breaks on the stretching pins. This danger is, furthermore, increased by the sharp bending around 360 with a radius of curvature of only 22.5 mm.
  • the object of the present invention is a process for .the production of stretched fiber-formed material of synthetic linear polymers which avoids the disadvantages mentioned above.
  • the fixation of the stretch-point takes place at a braking device having .a multiple subdivided surface.
  • the separation of the stretching process into several partial processes, separated in space and closely following each other in point of time not only makes possible a more lenient thread path with large radius of curvature, but their is now also sufficient space to arrange a strong aggregate which conducts off or cools the heat of stretching, as one is now no longer held to the maximum stretch-zone of /2 according to the U. S. patent cited.
  • Fig. 1 and Fig. 2 show diagrammatically perspective views of two embodiments of devices adapted to carry out the present invention.
  • Fig. 3 shows schematically a complete installation for stretching threads according to the present invention.
  • the stretching of the thread 1 takes place at the surface of several, as for instance 6 to 10 pins 2 made of a mechanically very resistant material, as for instance agate, vitrified corundum, hard porcelain, quartz, glass, silver steel, tungsten.
  • a mechanically very resistant material as for instance agate, vitrified corundum, hard porcelain, quartz, glass, silver steel, tungsten.
  • the insert pins 2 (Fig. 1) on which the thread is sub- .jected to braking action and stretching may be all of the .same diameter, or of different diameter, as shown in Fig. 2 (2a).
  • the cross-section of the pins is preferably circular but may also be elliptical.
  • a massive cylinder of material of good heat conductivity as for example, silver, copper, brass, bronze, aluminum, etc. serves as holder 3 for the pins.
  • the holder can be provided with supplementary equipment adapted to regulate temperature in the stretching process, if the process is to be carried out at raised or lower temperature, which may be necessary, for instance if the heat conductivity of the metal'of the holder is not sufficient to deduct the stretching temperature of the thread.
  • the braking device comprises for .this purpose a hollow holder 3a provided with a tubing 4, through which a temperature regulating liquid, for instance cooling water, will be conducted in the interior of said braking device, and with a tubing 5 through which said liquid leaves said hollow holder.
  • a temperature regulating liquid for instance cooling water
  • the braking device can be provided with a mechanical drive, which, during the stretching process, imparts to it a uniform rotation in the sense of the direcbe circulated in said braking device.
  • Fig. 3 shows such a rotatably arranged stretching device.
  • the holder 3 of the stretching pins 2 is mounted in a ball-bearing 11.
  • a gear 12 is mounted on the rear end of the stretching pin holder.
  • the stretching device can be rotated by means of a second gear and a motor-driven shaft 13.
  • a bobbin 6 containing unstretched thread is arranged on the holder 17 .
  • the thread 1 is guided over a braking member 7 made of china or stainless steel and imparting to the thread a slight pre-tension of less than .2
  • the thread is further guided over a changing thread guide 8 and runs on the rubber coated roller 9, which is in engagement with a chromium-plated steel roller 10. After encircling partially both rollers, the thread reaches the braking device which consists of a hollow holder 3 and a certain number (six to ten) of stretching pins 2.
  • the hollow holder 3 is provided at its open end with a stuffing box 19.
  • a cooling liquid may Subsequently, the thread reaches a pulling device comprising a roller 18 and a spacing roller 19, the thread being wound three to four times around this device.
  • the thread eventually reaches through a thread-guiding eyelet the bobbin 15 driven by a spindle 16.
  • the pins may be revolved in the holder so that worn spots may easily be removed from the path of the running thread.
  • the stretching device thus has, as compared with the breakable agate pins employed hitherto, practically unlimited durability.
  • a tension aggregate consisting of delivery cylinder and pressure roller
  • the rotatable arrangement of the braking device makes possible the individual adjustment of the braking action to the prevailing gage of the thread to be stretched, as a rotation opposite to the thread movement shifts the point of ultimate stretching backwards and a rotation in unison with the thread movement shifts the stretching point forward.
  • the latter is recommended if very fine threads (gage less than 20 denier) are stretched.
  • it is always possible to shift the stretching point in such a manner that the stretching is terminated at the latest on the n1 pin.
  • a 12-thread yarn of 30 denier of poly-e-caprolactam which was stretched by means of a 6 fold divided braking device of 18 mm. diameter exhibited a mean deviation of the titre from the averagevalue of 0.3 denier, determined on short pieces of threadof 3 cm. length.
  • the increased uniformity of the threads stretched ac cording to the invention is shown not only by the results of physical tests, but also in the chemical affinity to dyestuffs which adhere to the stretched fibers in completely uniform color shades and intensities.
  • Example 1 A 12-thread yarn of 105 denier of poly-e-caprolactam was passed through a feed device consisting of feed cylinder and rubber coated pressure roller, at a speed of m./min. en the thread was laid once around a brake-organ, as per Fig. l, of 18 mm. diameter and drawn off by means of a chrome-plated stretching roller with a speed of 175 m./minute. The 20 denier stretched silk exhibited in 3 cm.
  • Example 2 An irregularity of titre of 21.0%, of strength of :2.8%, and of elongation of Example 2
  • a 24-thread yarn of 220 denier of poly-hexamethylene adipate was passed through a feed device consisting of feed cylinder and rubber coated pressure roller at a speed of 80 m./min. Then the thread was wrapped once around a brake-organ as per Fig. 2 of 22 mm. diameter and drawn otf by means of a chromeplated stretching roller at a speed of 300 m./minute.
  • the stretched 60 denier silk exhibited an irregularity of titre of -O.S%, of strength of i3.1% and of elongation of i4.5%.
  • a device for stretching filiform materials of synthetic linear polymers a multiple of their original length comprising: two systems of rollers between which the filiform material is stretched, a braking device disposed between said rollers and around which said filiform material is wound at least once, said braking device consisting of 3. generally cylindrically shaped holder and a plurality of fixed braking pins recessed in the surface of the holder, means for cooling the holder and the pins to dissipate the heat generated by stretching the filiform material at said braking device, means for rotating said holder axially to adjust the braking efiect.
  • braking pins are agate pins of circular cross section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US178802A 1950-01-11 1950-08-11 Filament stretching apparatus Expired - Lifetime US2778058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH700176X 1950-01-11

Publications (1)

Publication Number Publication Date
US2778058A true US2778058A (en) 1957-01-22

Family

ID=4529962

Family Applications (1)

Application Number Title Priority Date Filing Date
US178802A Expired - Lifetime US2778058A (en) 1950-01-11 1950-08-11 Filament stretching apparatus

Country Status (6)

Country Link
US (1) US2778058A (fr)
BE (1) BE498428A (fr)
CH (1) CH282323A (fr)
FR (1) FR1032575A (fr)
GB (1) GB700176A (fr)
NL (1) NL84073C (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067460A (en) * 1960-09-20 1962-12-11 Du Pont Elongated cylindrical drawing element and method for treating yarn thereon
US3068530A (en) * 1960-11-03 1962-12-18 Du Pont Improved method of operating a heated draw pin with synthetic yarns
US3090997A (en) * 1958-11-26 1963-05-28 Du Pont Method of continuous treatment of as-spun birefringent polyamide filaments
US3103407A (en) * 1959-11-25 1963-09-10 Process of drawing melt spun polyester yarns
US3114999A (en) * 1960-11-28 1963-12-24 Monsanto Chemicals Method and apparatus for treating and drawing synthetic filament yarns
US3137033A (en) * 1960-10-07 1964-06-16 Algemene Kunstzijde Unie Nv Apparatus for drawing thread-shaped products
US3143764A (en) * 1961-07-12 1964-08-11 Hoechst Ag Device for the thermal treatment of synthetic fibers and filaments
US3144680A (en) * 1960-10-13 1964-08-18 Du Pont Apparatus for heating undrawn yarn for drawing
US3242248A (en) * 1961-06-13 1966-03-22 Rhodiaceta Process for the thermal treatment of thermoplastic fibres
US3273987A (en) * 1961-06-19 1966-09-20 Owens Corning Fiberglass Corp Coating fibrous glass yarns
US3280241A (en) * 1960-12-06 1966-10-18 Scragg & Sons Drawn branched filament
US3433861A (en) * 1966-01-12 1969-03-18 Celanese Corp Production of dyed,shaped oxymethylene polymers
US3673650A (en) * 1969-05-19 1972-07-04 Bemberg Spa Method for producing a thermoplastic synthetic yarn having a latent crimp
US3896530A (en) * 1973-11-16 1975-07-29 Denis Albert Edward Mattingly Apparatus for heating textile yarns and filaments

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1095489A (fr) * 1964-08-25

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2148162A (en) * 1937-05-11 1939-02-21 Us Rubber Co Apparatus for stretching cords
US2259202A (en) * 1938-03-16 1941-10-14 Tubize Chatillon Corp Thread control device for rayon spinning machines
US2271854A (en) * 1941-03-13 1942-02-03 Us Rubber Co Cord stretching apparatus
US2278888A (en) * 1938-11-02 1942-04-07 Du Pont Artificial structure and process for producing same
US2289232A (en) * 1939-07-14 1942-07-07 Du Pont Method and apparatus for producing filamentary structures
US2302508A (en) * 1935-11-23 1942-11-17 Sordelli Stefano Apparatus for stretching filiform materials
US2302792A (en) * 1941-04-24 1942-11-24 American Enka Corp Apparatus for use in the manufacture of rayon
GB580608A (en) * 1943-12-02 1946-09-13 Us Rubber Co Improvements in a method of controlling the tension of a strand
US2468666A (en) * 1942-03-27 1949-04-26 American Enka Corp Production of variable denier rayon
US2603853A (en) * 1950-05-17 1952-07-22 Kuljian Harry Asdour Filament storing and advancing reel

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2302508A (en) * 1935-11-23 1942-11-17 Sordelli Stefano Apparatus for stretching filiform materials
US2148162A (en) * 1937-05-11 1939-02-21 Us Rubber Co Apparatus for stretching cords
US2259202A (en) * 1938-03-16 1941-10-14 Tubize Chatillon Corp Thread control device for rayon spinning machines
US2278888A (en) * 1938-11-02 1942-04-07 Du Pont Artificial structure and process for producing same
US2289232A (en) * 1939-07-14 1942-07-07 Du Pont Method and apparatus for producing filamentary structures
US2271854A (en) * 1941-03-13 1942-02-03 Us Rubber Co Cord stretching apparatus
US2302792A (en) * 1941-04-24 1942-11-24 American Enka Corp Apparatus for use in the manufacture of rayon
US2468666A (en) * 1942-03-27 1949-04-26 American Enka Corp Production of variable denier rayon
GB580608A (en) * 1943-12-02 1946-09-13 Us Rubber Co Improvements in a method of controlling the tension of a strand
US2603853A (en) * 1950-05-17 1952-07-22 Kuljian Harry Asdour Filament storing and advancing reel

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090997A (en) * 1958-11-26 1963-05-28 Du Pont Method of continuous treatment of as-spun birefringent polyamide filaments
US3103407A (en) * 1959-11-25 1963-09-10 Process of drawing melt spun polyester yarns
US3067460A (en) * 1960-09-20 1962-12-11 Du Pont Elongated cylindrical drawing element and method for treating yarn thereon
US3137033A (en) * 1960-10-07 1964-06-16 Algemene Kunstzijde Unie Nv Apparatus for drawing thread-shaped products
US3144680A (en) * 1960-10-13 1964-08-18 Du Pont Apparatus for heating undrawn yarn for drawing
US3068530A (en) * 1960-11-03 1962-12-18 Du Pont Improved method of operating a heated draw pin with synthetic yarns
US3114999A (en) * 1960-11-28 1963-12-24 Monsanto Chemicals Method and apparatus for treating and drawing synthetic filament yarns
US3280241A (en) * 1960-12-06 1966-10-18 Scragg & Sons Drawn branched filament
US3242248A (en) * 1961-06-13 1966-03-22 Rhodiaceta Process for the thermal treatment of thermoplastic fibres
US3273987A (en) * 1961-06-19 1966-09-20 Owens Corning Fiberglass Corp Coating fibrous glass yarns
US3143764A (en) * 1961-07-12 1964-08-11 Hoechst Ag Device for the thermal treatment of synthetic fibers and filaments
US3433861A (en) * 1966-01-12 1969-03-18 Celanese Corp Production of dyed,shaped oxymethylene polymers
US3673650A (en) * 1969-05-19 1972-07-04 Bemberg Spa Method for producing a thermoplastic synthetic yarn having a latent crimp
US3896530A (en) * 1973-11-16 1975-07-29 Denis Albert Edward Mattingly Apparatus for heating textile yarns and filaments

Also Published As

Publication number Publication date
NL84073C (fr)
GB700176A (en) 1953-11-25
CH282323A (de) 1952-04-30
BE498428A (fr)
FR1032575A (fr) 1953-07-02

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