US3708969A - Thread guide roller - Google Patents

Thread guide roller Download PDF

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Publication number
US3708969A
US3708969A US00082312A US3708969DA US3708969A US 3708969 A US3708969 A US 3708969A US 00082312 A US00082312 A US 00082312A US 3708969D A US3708969D A US 3708969DA US 3708969 A US3708969 A US 3708969A
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US
United States
Prior art keywords
thread
guide roller
roller
draw
godet
Prior art date
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Expired - Lifetime
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US00082312A
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English (en)
Inventor
C Nitschke
H Haubold
P Klementz
H Massat
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Individual
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Individual
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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
    • D02J1/226—Surface characteristics of guiding or stretching organs
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
    • D02G1/024—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting with provision for imparting irregular effects to the yarn
    • 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 godet is normally positioned adjacent the guide roller with almost parallel axes of rotation which form a very small angle sufficient to produce the desired effect.
  • One attempts to maintain this spatial separation because it is essential to avoid thread windings running over one another and a resulting damage or breakage of the threads.
  • the path of travel or run of the thread on the guide roller is extremely uneven. This arises from the fact that a twist being formed either as a true twist or as a false twist is transmitted from the twisting device along the thread itself up to the guide roller where this twist causes the thread to roll in the direction of twist along the surface of the roller.
  • This movement of the thread axially of the guide roller causes it to come into contact with adjacent windings or loops around the guide roller and even climb over these adjacent windings so as to cause frequent damage to the filaments or breakage of the thread.
  • One object of the present invention is to provide a thread guide roller which will prevent this rolling movement of threads axially of the roller under the influence of a twist imparted to the running thread just before or after its winding or looping contact with the roller, especially in draw-twist apparatus which requires at least one such guide roller in combination with a godet as thread drawing means.
  • Another object of the invention is to provide a variation in the construction of this thread guide roller which will solve the stated problem and which can be readily adapted to existing guide rollers.
  • a thread guide roller comprising a rotatably mountable thread-receiving cylindrical roller having a circumferential bead projecting radially outwardly from its cylindrical surface adjacent the ends thereof.
  • This roller is especially effective in draw-twist apparatus where it is employed in combination with a godet as one element in thread drawing means, such apparatus also including thread twisting means in direct threaded connection with the guide roller such that the imparted twist is transmitted along the thread from the twisting means to the guide roller.
  • the bead With several windings transported along the surface of the guide roller, the bead is situated between the thread run-off end of the roller and the next udjacent thread winding, i.e. between the last two windings near one end of the roller, preferably at a distance from the end of the thread contacting surface of about 15 to 40 percent of the length of this normally cylindrical surface.
  • FIG. 1 is a partly schematic illustration of draw-twist apparatus, including a side elevational view of a godet and the thread guide roller of the invention;
  • FIG. 2 is a front elevational view of the godet and thread guide roller of FIG. 1, another preferred arrangement of the guide roller in reference to the godet being shown in broken lines;
  • FIGS. 3-8 are cross-sectional views of anumber of preferred embodiments of the thread guide roller of the invention.
  • a conventional rotatably driven godet l on axis la is positioned adjacent to the thread guide roller 2 which is freely turnable on its axis 20 and which is provided with the circumferential bead 3 spaced inwardly from its front or right end by a distance of about 25 percent of its length.
  • the thread 4 extends downwardly from any suitable thread feeding means, for example a pair of feed rolls which may also be a godet and guide roller, to first contact the thread guide roller 2 located laterally above the godet l.
  • the thread 4 then loops or winds several times around both the godet 1 and roller 2, a number of these individual windings 5 lying to the left of the bead 3 while the last winding 6 lies to the right of this bead 3 as the thread 4 is taken off the guide roller 2 and conducted directly to a thread twisting means where an S- twist is imparted to the thread.
  • the S-twist imparted by the twisting device travels back to the roller 2 and causes the winding 6 to roll to the left in an axial direction along the circumferential surface of the roller, such that the winding 6 would normally roll over the windings 5.
  • the bead 3 .prevents this rolling movement, the thread winding 6 remaining in contact with the right flank of the bead 3 without climbing over this bead. In this manner, i.e. with the bead acting as a barrier or obstacle to the rolling effect of the twisted thread, damages to the thread and breaking of the thread can be completely avoided.
  • This first arrangement is also shown in FIG. 2 in solid lines as a front view of the godet and guide roller of FIG. 1, i.e. where the guide roller or run-off roller 2 is positioned laterally above the godet l.
  • the guide roller 2' is however preferably placed laterally below the godet 1 (as shown in broken lines), especially where these two members serve as the draw rolls in the drawtwist apparatus with a generally vertical path of travel of the yarn or thread 4.
  • the highly tensioned thread 4' as it is transported approximately vertically downwardly from a feed godet or similar feed means runs laterally in close proximity to the draw godet 1 without touching this godet and then first contacts the guide roller 2' which is approximately tangent to the vertical path of thread travel. Thereafter, the
  • thread is wound in running contact several times around both the godet l and roller 2' to form a number of spaced loops in the same manner as shown in FIG. 1. Again, thelast winding 6 is to the right of the bead 3' and runs off from this position, again in an approximately vertical path to the thread twisting means.
  • the bead 3' on guide roller 2' as shown in FIG. 2 also prevents the rolling movement of the last winding over the remaining windings 5 just as in the embodiment of FIG. 1. Itis further important, however, to avoid thread Thus, where the most strongly tensioned thread lies above the guide roller 2' as shown by broken lines in,
  • FIG. 2 i.e. where the thread is being drawn or stretched, it is advisable to'position the godet l laterally above this roller 2' and close to the upper more strongly tensioned thread 4' as it comes onto the guide roller.
  • the last winding 6 as it runs off the godet/roller combination has a minimum of contact with the cylindrical surface of the guide roller 2' while being maintained axially of this I roller by the bead 3'. In this manner, breaking or other damage to the thread is most extensively avoided while ensuring the uniform running and even spacing of the windings on the godet/roller combination without any axial thread rolling movement over long periods of continuous operation.
  • the individual beads 3 can be integral with the guide roller 2 as shown in FIG. 3.
  • the bead in order to equip existingthread guide rollers with a supplemental bead as required by theinvention, it is possible to construct the bead separately as a ring-shaped member which can then be pressed, shrink-fitted or otherwise drawn or forced onto the existing roller in closely, fitting contact with the thread contacting surface of the roller, i.g; as shown by the ring bead 3a in FIG. 5.
  • Such the particular bead 3b or 30 is integral with a shell or sleeve 7 capable of being slipped onto the roller 2 such that this sleeve provides the thread contacting-surface of the guide roller.
  • This sleeve 7 is especially adapted to be removably mounted, e.g. with radial tightening screws or other means of holding it firmly onto the roller 2.
  • the annular ring member 30 as shown in FIG. 5 can also be removably mounted, e.g. by screws extending radially through its apex, and can be easilyslipped along the roller 2 so as to adapt the roller to any specific operation or different thread runoff configurations requiring one or several windings.
  • This ring member therefore represents an especially economical embodiment of the invention for reequipping existing guide rollers.
  • the bead be constructed with concave oppositely disposed flanks running smoothly into the thread contacting surface of the cylindrical roller, i.e. substantially as illustrated by the embodiment of FIG. 6'. With the gradually increased slope or inclination of the flank facing the last runoff winding, the upward climbing movement of the thread i as it is rolled axially by the twist is completely stopped.
  • the minimum height of the bead i.e. in its radial direction outwardly from the cylindrical roller surface, can be easily determined for any operationby a few routine tests. This height should ordinarily be at least five times and preferably many more times the diameter of the thread or yarn being transported, again dependingupon its precise cross-sectional shape or configuration.
  • the cylindrical thread contacting roller is composed of a hard surfaced metal or ceramic material.
  • the bead material should be very smooth so that the thread or yarn does not discover a holding position or stairstep indentation which would encourage a rolling combing movement.
  • the bead When employing a simple thread guide roller without several windingsalong its length,it is possible to locate the bead at about the center of the roller. Depending upon the direction of thread twist, i.e'. either an S-twist the roller and repeating this path several times in a spiral or helical type of winding. Since the godet is normally of larger diameter than the guide roller, larger loops are formed on the godet than the roller as indicated in the drawings, and if desired, the godet may be heated for treatment of the transported thread at an elevated temperature. In this case,'the bead is best located about to 40 percent of the length of the guide roller from the run-off end, preferably about to percent from this end.
  • the multi-looped winding of the godet/roller combination is particularly desirable in a draw-twist apparatus where the thread is first drawn or stretched, i.e. between a first driven godet/lroller pair acting as feed rolls and a second driven godet/roller pair acting as the draw rolls, the latter pair of rolls turning at a higher rotational speed than the first set of feed rolls to impart a predetermined stretching to the thread under relatively high tension. Twist is then immediately imparted to the stretched thread after it leaves the draw rolls, it being essential for purposes of the invention to provide a beaded guided roller as described herein as a means of counteracting the rolling movement of the thread along this guide roller of the draw rolls.
  • the twisted thread can then be taken up on a spindle or supply bobbin while substantially avoiding or completely preventing thread breakage and damage to the thread, yarn or individual filaments during the draw-twist operation.
  • the beaded thread guide roller ofthe invention is not only successful in counteracting the axially directed rolling movement of a twisted thread along the roller surface but also eliminates any necessity for installing so-called twist stoppers or other complicated devices between the twisting device and the guide roller of the drawing means, such devices being only partly effective in preventing a twist from being carried back to the guide roller. This in turn permits a relatively short span between this guide roller and the twisting device with a corresponding reduction in the overall effective operating length of the draw-twist apparatus in the usually vertical direction of thread travel.
  • Draw-twist apparatus as claimed in claim 1 wherein said circumferential bead consists of a wearresistant plastic material while the remaining thread contacting surface is composed of a hard-surfaced metallic or ceramic material.
  • said thread drawing means includes an upper ,feed means and lower drawwrolls consisting of said godet in combination with said guide roller, and said thread twisting means is positioned below said lower I draw rolls to provide a substantially vertical linear path of thread travel from said upper feed means to said guide roller and again from said guide roller to said twisting means, the thread being wound a number of timesaround both said godet and said guide roller, and
  • said godet is arranged laterally above said guide roller 7 in close proximity to said first-mentioned substantially vertical linear path of thread travel from said upper feed means to said guide roller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
US00082312A 1969-10-24 1970-10-20 Thread guide roller Expired - Lifetime US3708969A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691953527 DE1953527A1 (de) 1969-10-24 1969-10-24 Fadenumlenkrolle

Publications (1)

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US3708969A true US3708969A (en) 1973-01-09

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US00082312A Expired - Lifetime US3708969A (en) 1969-10-24 1970-10-20 Thread guide roller

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US (1) US3708969A (es)
AT (1) AT311220B (es)
BE (1) BE754173A (es)
CH (1) CH507148A (es)
DE (1) DE1953527A1 (es)
ES (1) ES382342A1 (es)
FR (1) FR2066480A5 (es)
GB (1) GB1302014A (es)
LU (1) LU61830A1 (es)
NL (1) NL7013013A (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835632A (en) * 1972-10-30 1974-09-17 Teijin Ltd Draw-texturing apparatus
US4342189A (en) * 1978-03-13 1982-08-03 Toray Industries, Inc. Apparatus for producing a bundle of fibrous elements
FR2871454A1 (fr) * 2004-06-09 2005-12-16 Rieter Textile Machinery Fr Dispositif de mise en tension d'une matiere filiforme notamment d'un fil textile
CN115648654A (zh) * 2022-12-09 2023-01-31 太原理工大学 一种纤维缠绕机械手及其多束丝嘴装置、纤维缠绕方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN145239B (es) * 1975-05-16 1978-09-16 M Delport
AT393700B (de) * 1988-07-13 1991-11-25 Fehrer Ernst Ringspinnmaschine
DE19847744B4 (de) * 1998-10-16 2004-04-22 Leuze Textil Gmbh + Co Verfahren zur Herstellung von Coregarnen und/oder Fäden aus derartigen Garnen sowie Vorrichtung zur Durchführung des Verfahrens

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553127A (en) * 1939-02-24 1951-05-15 Lustrafil Ltd Guiding of threads or filaments
US2596520A (en) * 1943-01-04 1952-05-13 Lustrafil Ltd Thread guiding apparatus
US2976671A (en) * 1958-10-30 1961-03-28 American Enka Corp Method of threading drawtwister
US3018608A (en) * 1957-05-08 1962-01-30 Glanzstoff Ag Process for the production of lowshrinkage polyethylene terephthalate threads
US3073001A (en) * 1958-10-21 1963-01-15 Du Pont Apparatus for cold-drawing yarn
US3475896A (en) * 1968-04-29 1969-11-04 Celanese Corp Stabilizing yarn threadline during twisting
US3489368A (en) * 1967-10-17 1970-01-13 Barber Colman Co Tension regulator for stretch core thread

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553127A (en) * 1939-02-24 1951-05-15 Lustrafil Ltd Guiding of threads or filaments
US2596520A (en) * 1943-01-04 1952-05-13 Lustrafil Ltd Thread guiding apparatus
US3018608A (en) * 1957-05-08 1962-01-30 Glanzstoff Ag Process for the production of lowshrinkage polyethylene terephthalate threads
US3073001A (en) * 1958-10-21 1963-01-15 Du Pont Apparatus for cold-drawing yarn
US2976671A (en) * 1958-10-30 1961-03-28 American Enka Corp Method of threading drawtwister
US3489368A (en) * 1967-10-17 1970-01-13 Barber Colman Co Tension regulator for stretch core thread
US3475896A (en) * 1968-04-29 1969-11-04 Celanese Corp Stabilizing yarn threadline during twisting

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3835632A (en) * 1972-10-30 1974-09-17 Teijin Ltd Draw-texturing apparatus
US4342189A (en) * 1978-03-13 1982-08-03 Toray Industries, Inc. Apparatus for producing a bundle of fibrous elements
FR2871454A1 (fr) * 2004-06-09 2005-12-16 Rieter Textile Machinery Fr Dispositif de mise en tension d'une matiere filiforme notamment d'un fil textile
WO2005123557A1 (fr) * 2004-06-09 2005-12-29 Rieter Textile Machinery France Dispositif de mise en tension d'une matiere filiforme notamment d'un fil textile
CN115648654A (zh) * 2022-12-09 2023-01-31 太原理工大学 一种纤维缠绕机械手及其多束丝嘴装置、纤维缠绕方法
CN115648654B (zh) * 2022-12-09 2023-03-21 太原理工大学 一种纤维缠绕机械手及其多束丝嘴装置、纤维缠绕方法

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Publication number Publication date
CH507148A (de) 1971-05-15
GB1302014A (es) 1973-01-04
LU61830A1 (es) 1971-04-28
DE1953527A1 (de) 1971-05-19
NL7013013A (es) 1971-04-27
FR2066480A5 (es) 1971-08-06
AT311220B (de) 1973-11-12
ES382342A1 (es) 1972-11-16
BE754173A (fr) 1970-12-31

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