US3137033A - Apparatus for drawing thread-shaped products - Google Patents

Apparatus for drawing thread-shaped products Download PDF

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Publication number
US3137033A
US3137033A US141777A US14177761A US3137033A US 3137033 A US3137033 A US 3137033A US 141777 A US141777 A US 141777A US 14177761 A US14177761 A US 14177761A US 3137033 A US3137033 A US 3137033A
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US
United States
Prior art keywords
pins
diameter
thread
drawn
pin
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
US141777A
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English (en)
Inventor
Maaskant Leendert
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.)
Akzo NV
Original Assignee
Algemene Kunstzijde Unie NV
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 Algemene Kunstzijde Unie NV filed Critical Algemene Kunstzijde Unie NV
Application granted granted Critical
Publication of US3137033A publication Critical patent/US3137033A/en
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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
    • D02J1/227—Control of the stretching tension; Localisation of the stretching neck; Draw-pins
    • 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
    • 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
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/017—Filament stretching apparatus

Definitions

  • This invention relates to an apparatus for drawing continuously moving filaments, threads, yarns, ribbons and similar filamentary products having a basis of thermoplastic linear polymers. More particularly, this invention relates to a drawing apparatus comprising a feeding device, a drawing device and a discharge device.
  • the products are withdrawn by the discharge device at a rate of speed greater than that at which they were supplied by the feeding device.
  • a longitudinal orientation of the polymeric molecular chains in the thread-shaped product occurs.
  • the tensile strength of these thread-shaped products is greatly increased as a result of this orientation.
  • a drawing device comprising one or more pins, rods, or pin-like members-about which filaments, threads, yarns, ribbons and the like are adapted.
  • thermoplastic material exhibits an abrupt decrease in cross-sectional area. This abrupt decrease is termed a necking down in the art. Since, theoretically, this necking down always takes place at substantially the same portion of the thread-shapedmcmber, the thickness of this member will be more uniform after drawing over a draw-pin than in the case where drawing and orientation are carried out without the use of such a pin-like drawing device.
  • drawing devices have already been suggested that comprise a thick pin, which may or may not be heated, and which measures 75 to 100 mm. in diameter.
  • Another drawing device having approximately the same diameter has been achieved by employing a combination of several mutually parallel pins. In the lattercase, several pins are arranged in a circular formation in order that they may be circumscribed by the material to be drawn. In order to obtain a uniform ambient temperature in these pins, they may be heated by a centrally ner.
  • a plurality of draw points will obviously produce a larger product in crosssection than a single draw point since the drawing tension or drawing force is spread over a greater surface area due to the plurality of necks or shoulders. That is, the reduction in'the diameter of the thermoplastic material is inversely proportional to the force applied per unit area. Consequently, these prior art devices will produce a product having a continually varying diameter along the length of the drawn product.
  • Another object of this invention is to provide a drawing device which may be simply adapted to existing drawing machines.
  • a further object of this invention is to provide an apparatus for producing drawn thread having high strength, low elongation and low shrinkage, from synthetic thermoplastic linear polymers.
  • Still a further object of this invention is to provide a drawing device that will permit the uniform and continuous drawing of synthetic linear polymer materials, and the consequent production of higher quality goods than has been known heretofore.
  • the drawing device of this invention comprises two substantially parallel cylindrical pins that are placed next to and in contact with each other. Surprisingly, it has been found that this extremely simple embodiment of a drawing device gives rise to a remarkable decrease in the number of faults in the drawn product if the same is wrapped a full turn around these combined pins. Preferably, but not necessarily, these pins are of the same uniform diameter.
  • This invention also relates to a drawing machine employing these pins.
  • the uniformity of the drawn product of this invention is even greater than when the same product is drawn over a device comprising a series of pins that are substantially arranged in a circle. Particularly good results are obtained when the pins of this invention have a round cross-section measuring more than 10 mm. in diameter and preferably about 15 to 25 mm. in diameter.
  • the material used for the construction of these pins may be porcelain, glass or chromium plated metal. Preference, however, is given to pins constructed from a ceramic material containing at least 99% of titanium dioxide (TiO In using the device of this invention, it has been found that the number of faults can be kept particularly small if the surface of these pins is highly polished.
  • the numeral ll refers to a thread tensioning device over which a running length of a threadshaped member 2 is fed from a supply bobbin (not shown) to a feeding device comprising a feed roller 3 and pressure roller 4.
  • Feed roller 3 is driven by a motor (not shown) in a manner well known in the art.
  • pressure roller 4 is caused to bear against the roller 3.
  • the surface of the roller 4 is composed of an elastic materiahsuch as a natural or artificial cork material, synthetic rubber or natural rubber.
  • the roller 4 is supported by oscillating arms 5, only one of which is shown.
  • Pressure roller 4 is not self-driven, but is rotated by reason of frictional contact with roller 3.
  • the filament, thread, yarn or ribbon 2 is kept in contact with the pressure roller 4 at an angle of wrap of more than 180 with the aid of a thread guide 6.
  • the thread guide 6 is traversed slowlyin a direction that is longitudinal to the movement of the pressure roller 4. After the threadhas left the feed roller 3, it is wrapped a single turn around the drawing device 7 and subsequently progresses to the discharge device where it is wrapped a few turns around a draw godet 8 and idler roller 9.
  • Draw gode't 8 rotates at a circumferential speed in excess of that of the feed roller 3 to accomplish the drawing action.
  • the wraps around the draw godet 8 are kept spaced in a manner that is well known in the art.
  • the drawn thread-shaped member 2 is then passed from the draw godet 8 to a ring twisting spindle or take-up device (not shown) by means of which it is twisted and wound onto a bobbin or package (not shown) in a manner well known in the art.
  • the drawing device 7 comprises two circularly cylindrical pins 10 and 11 measuring 19 mm. in diameter and arranged substantially parallel to, and in contact with each other.
  • these two pins are of the same or identical diameter.
  • pins shown measure 19 mm. in diameter
  • this invention is operative with pins of substantially equal diameter within the range of about 10 to 25 mm. in diameter.
  • these pins are composed of a ceramic material which contains more than 99% of Ti
  • the surfaces of the pins are highly polished.
  • An apparatus for continuously drawing a running length of a synthetic filamentary material which comprises a feeding device for undrawn'filamentary material, a drawing device, and a discharge device for drawn filamentary material, said drawing device being located in the path of the filamentary material passing between the said feeding device and said discharge device and comprising at least two essentially cylindrical pins, said pins being arranged so that the outer surfaces thereof are contacting and the axes thereof are substantially in parallel, and said feeding device and said discharge device being adapted to apply drawing tension to said filamentary material as it passes over .said drawing device.
  • each of said pins has a diameter in the range of from about 15 to about 25 mm.
  • each of said pins has a diameter in the range of about 15 to about 25 mm., and at least the outer surfaces of said pins are composed of a ceramic material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US141777A 1960-10-07 1961-09-29 Apparatus for drawing thread-shaped products Expired - Lifetime US3137033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL256651 1960-10-07

Publications (1)

Publication Number Publication Date
US3137033A true US3137033A (en) 1964-06-16

Family

ID=19752614

Family Applications (1)

Application Number Title Priority Date Filing Date
US141777A Expired - Lifetime US3137033A (en) 1960-10-07 1961-09-29 Apparatus for drawing thread-shaped products

Country Status (5)

Country Link
US (1) US3137033A (en))
BE (1) BE608720A (en))
ES (1) ES270898A1 (en))
GB (1) GB921854A (en))
NL (2) NL256651A (en))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422491A (en) * 1964-09-09 1969-01-21 Asahi Chemical Ind Apparatus for stretching synthetic fibers
US3475896A (en) * 1968-04-29 1969-11-04 Celanese Corp Stabilizing yarn threadline during twisting
US3483593A (en) * 1965-03-25 1969-12-16 Ici Ltd Drawing apparatus
US3790996A (en) * 1971-09-23 1974-02-12 Roannais Constr Textiles Yarn guiding apparatus
US6148598A (en) * 1998-03-04 2000-11-21 Icbt Yarn Thread delivery device for a textile spinning, throwing, texturing or suchlike machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114575011B (zh) * 2022-02-15 2023-12-19 威海光威精密机械有限公司 一种单向纤维展平和单丝张力同步装置及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296394A (en) * 1940-11-22 1942-09-22 Du Pont Manufacture of novelty artificial yarn
US2369266A (en) * 1941-01-28 1945-02-13 American Lava Corp Electrically conductive ceramic thread guide
US2611923A (en) * 1949-08-31 1952-09-30 Du Pont Method and apparatus for the drawing of synthetic funicular structures
US2778058A (en) * 1950-01-11 1957-01-22 Inventa Ag Filament stretching apparatus
US2859472A (en) * 1955-10-05 1958-11-11 Allied Chem Apparatus for reducing shrinkage and creep of thermoplastic yarns
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296394A (en) * 1940-11-22 1942-09-22 Du Pont Manufacture of novelty artificial yarn
US2369266A (en) * 1941-01-28 1945-02-13 American Lava Corp Electrically conductive ceramic thread guide
US2611923A (en) * 1949-08-31 1952-09-30 Du Pont Method and apparatus for the drawing of synthetic funicular structures
US2778058A (en) * 1950-01-11 1957-01-22 Inventa Ag Filament stretching apparatus
US2859472A (en) * 1955-10-05 1958-11-11 Allied Chem Apparatus for reducing shrinkage and creep of thermoplastic yarns
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422491A (en) * 1964-09-09 1969-01-21 Asahi Chemical Ind Apparatus for stretching synthetic fibers
US3483593A (en) * 1965-03-25 1969-12-16 Ici Ltd Drawing apparatus
US3475896A (en) * 1968-04-29 1969-11-04 Celanese Corp Stabilizing yarn threadline during twisting
US3790996A (en) * 1971-09-23 1974-02-12 Roannais Constr Textiles Yarn guiding apparatus
US6148598A (en) * 1998-03-04 2000-11-21 Icbt Yarn Thread delivery device for a textile spinning, throwing, texturing or suchlike machine

Also Published As

Publication number Publication date
BE608720A (nl) 1962-02-01
DE1435318B2 (de) 1973-01-25
ES270898A1 (es) 1962-03-16
DE1435318A1 (de) 1968-11-21
NL104904C (en))
NL256651A (en))
GB921854A (en) 1963-03-27

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