US3426406A - Apparatus for interlacing multifilament yarn - Google Patents

Apparatus for interlacing multifilament yarn Download PDF

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Publication number
US3426406A
US3426406A US639362A US3426406DA US3426406A US 3426406 A US3426406 A US 3426406A US 639362 A US639362 A US 639362A US 3426406D A US3426406D A US 3426406DA US 3426406 A US3426406 A US 3426406A
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United States
Prior art keywords
yarn
fluid
jet
passageway
interlace
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Expired - Lifetime
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US639362A
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English (en)
Inventor
Frank Mccutchan Jr
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EIDP Inc
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EI Du Pont de Nemours and Co
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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
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/32—Regulating or varying draft
    • D01H5/36—Regulating or varying draft according to a pre-arranged pattern, e.g. to produce slubs

Definitions

  • An improved jet for interlacing and plying multifilament yarn comprising a body member, a yarn passageway through the body along a straight axis, and at least one pair of opposed fluid conduits having a common longitudinal axis which intercepts and is perpendicular to the axis of the yarn passageway, the yarn passageway being further characterized by having a cross section in the vicinity of the fluid conduits corresponding to an ellipse or a rectangle having semicircular ends, the cross section having a width to height ratio within critical limits for improved interlace uniformity and greater fluid efiiciency.
  • This invention relates to improved fluid interlacers which impinge opposed jets of fluid on yarn for producing interlaced multifilament yarn of improved interlace uniformity.
  • This invention provides a fluid interlacer for yarn which produces more uniform spacing of maximum interlace points along the threadlines than existing equipment.
  • This invention also provides an interlace jet that requires a smaller amount of interlacing fluid to produce a yarn having a given average level of interlace cohesion. Also provided is an interlacer that produces a yarn having less variation of filament entanglement,
  • the improved fluid interlacer of this invention comprises an interlacer body having a yarn passageway and a pair of opposed fluid conduits which are positioned within the body to direct streams of high velocity fluid perpendicular to the axis of the yarn passageway.
  • the yarn passageway at the point where the fluid conduits intersect is rectilinear with semicircular ends, oval, or elliptical :in cross section with critical dimensions as specified in the description of the preferred embodiments and the claims.
  • the yarn passageway cross section need not be the same in form throughout its length.
  • the two opposed fluid conduits have a common longitudinal axis and may be circular in cross section or any suitable configuration such as rectangular, oval, or the like.
  • FIGURE 1 is a longitudinal cross section taken along the axis of the yarn passageway of a fluid interlacer of this invention
  • FIGURE 2 is a cross-sectional end view taken on line 2-2 of FIGURE 1;
  • FIGURE 3 is a cross-sectional end view taken on line 2-2 of FIGURE 1, showing another embodiment of this invention
  • FIGURE 4 is a diagrammatic illustration of the use of the improved fluid interlacer in a process of successively drawing and interlacing yarn;
  • FIGURE 5 is an illustration of yarn which has been interlaced by an interlacer of this invention.
  • FIGURE 6 shows yarn interlaced by an interlacer of the prior art which has a yarn passageway of a circular cross section
  • FIGURES 7 and 8 illustrate yarn interlaced in an interlacer in which the ratio of the width W of the oval yarn passageway to the height H of the passageway exceeds the critical limits of this invention.
  • FIGURE 1 illustrates a representative fluid interlacer of this invention which has lengthwise yarn passageway 12 and opposed fluid conduits 13A and 13D.
  • Fluid conduits 13A and 13D have a common longitudinal axis and intercept yarn passageway 12 at right angles such that the longitudinal axis of the fluid conduits and the longitudinal axis of the yarn passageway are perpendicular.
  • FIGURE 2 illustrates an embodiment of the invention in which the yarn passageway 12 has a rectilinear cross section as defined by a rectangle having semicircular ends.
  • FIGURE 3 illustrates another embodiment of the invention in which the yarn passageway 12 has a cross section as defined by an ellipse.
  • the performance of the interlacer having the elliptical yarn passageway of FIG- URE 3 is not significantly different from the interlacer of FIGURE 2 having the rectilinear yarn passageway.
  • the height of yarn passageway 12 is indicated by H and is measured along the axis of the opposed fluid conduits 13A and 13D.
  • the width of yarn passageway 12 is indicated by W and measured perpendicularly to each end at the intersection of the axis of fluid conduits 13A and 13D and the longitudinal axis of yarn passageway 12.
  • the diameter of the fluid conduits 13A and 13D is referred to as F.
  • Air or other fluid can be supplied to the opposed fluid conduits by a suitable manifold arrangement.
  • FIGUERE 4 shows apparatus useful for interlacing as part of the drawing operation. It illustrates the stringup assembly whereby interlacing occurs immediately after drawing and prior to packaging.
  • undrawn yarn 27 is withdrawn from package 35, passes through pigtail guide 30, then is passed in multiple wraps about driven feed roll 36 and its associated separator roll 37.
  • U.S. patent application Sea. No. 485,438 filed Sept. 7, 1965, now U.S. Patent No. 3,364,537 shows the arrangement of an interlacer in a conventional spinning operation which is also suitable arrangement for the interlacer of this invention.
  • a stringup slot 22 extends the length of the interlacers and permits stringup with a minimum loss of interlacing fluid.
  • the tunbulent action of the fluid in the yarn passageway 12 serves to curtain the stringup slot so that there is little likelihood of the yarn blowing out of yarn passageway 12 through slot 22.
  • fluid entering the yarn passageway from slot 22 prevents the yarn filaments, during the interlacing process, from contacting the edges of stringup slot 22 and thus snagging the filaments.
  • the improvement resides in critical selection of yarn passageway cross section to achieve the unexpected results of greatly improved interlace uniformity and also increased fluid efficiency, i.e. lower fluid requirements at a given degree of interlacing.
  • the dimension H should be in the range of about 1.4 to about 1.75 times the diameter of the fluid passage 'F.
  • the ratio of the width W to the height H of the yarn passageway should be between about 1.5 to l and 2.2 to 1.
  • the length of the yarn passages may be widely varied, but should not be less than the width W.
  • the length of the yarn passageway will be about 2 to times its width W and should normally be not more than times its width.
  • the length of the yarn passageway should preferably be from about 0.2 inch to 1.0 inch.
  • the cross-sectional areas of the opposed fluid conduits should be equal to each other at interception with the yarn passageway, and the ratio of the cross-sectional area of the yarn passageway to the area of one of the fluid conduits should be betwen about 4 to 1 and 7 to 1.
  • the yarn passage cross section of this invention may be of any shape approximating that of the shapes shown herein while conforming to the major dimensions specified.
  • the rounded ends defined herein by radius R may be approximated by polygons, or the entire cross section may be an ellipse or other non-round assemblage of smooth curves having no reversals of curvature.
  • Yarn passage dimensions should be as small as practical to conserve interlacing fluid and to concentrate the zone and effect of the controlled fluid turbulence.
  • too small a yarn channel can constrict the filament bundle, preventing the filaments from splaying apart sufiiciently to become adequately intermingled.
  • the fluid force is concentrated by reducing the dimension H from that of the prior art apparatus, yet an adequate cross-sectional area of the yarn passage is maintained or increased for escape of the fluid by increasing dimension -W, thus maintaining high fluid velocity at the points where fluid impinges on the yarn.
  • the increased width W provides additional space for the yarn filaments to become separated sufficiently so that more thorough intermingling is possible.
  • the heart of the present invention is the particular combination of shapes and dimensions which produce improved turbulent fluid patterns in the yarn passage to open the bundle sufiiciently for increased intermingling of filaments and yet prevent the yarn from dwelling in low turbulence areas for any substantial length of time.
  • Cellulose acetate yarn is used in the examples for illustration purposes though any continuous multifilament yarn is suitable.
  • the interlacer is arranged in a conventional spinning process though it could be appr0- priately locate in other positions, such as, in a drawing process (see FIG. 4).
  • the degree of interlace is measured by the testing device described in U.S. Patent 3,290,932.
  • Large pin drop node intervals indicate loW degree of interlace whereas small pin drop node intervals indicate a high degree of interlace.
  • the measurement of variation, 0' defined as n 2 n (a) .2.
  • JET TYPE 116 I-Al 6. 0 2. 75 0. 50 48 Jet Identification 110 124 From the above table it is seen that the prior art ap- Yarn Speed, yds./min 680 680. paratus used 41% higher pressure than the jet of this invention to produce much less uniform interlace which No. of Filaments.-. is highly significant.
  • the jets of this example have larger fluid conduits area. (about 46% larger cross section) than the jets of EX- Yam 1116 Shape Round ample I.
  • Ratio H to F Ratio W to H 1. Fluid Conduit Cross Section Area, 111.... 3.067X-L.-. 3. 67X10- Yarn Hole Cross Section Area, in? 16.64X10-L... .05X10- Rastrio Yarn Hole Area to Fluid Conduit 5.42:1 4.58:1.
  • Jet Identification 126 103 (Improved) (Prior Art) Yarn speed, yds/min.
  • the elliptical hole jet uses about 50% as much air as the prior art jet (Run V-Al) to make a more uniform yarn having about the same degree of interlace.
  • EXAMPLE VI This example shows the effect of increasing the ratio of yarn hole width W to height H to a level outside of the critical limits of this invention.
  • Width in. Ratio H to F 1 63:1 1.63:1.
  • Fluid Conduit Cross Section Area in. 1.698X10- 1.698X10- Yarn Hole Cross Section Area, in. 15.48X10-L 7.88X1IH.
  • V-A is 0.67 0.0166 40 (Reetan ular (Oval Hole, V-B 10 1.08 0. 0321 40 E015 Fig. 2)
  • the Type 114 oval-hole jet of this invention produces much more uniform interlace and a higher degree of yarn to separate and interlace filaments of the yarn, said opposed conduits having a common longitudinal axis which intersects the axis of the yarn passageway and is perpendicular thereto; and means for supplying cfluid to said opposed conduits; wherein the improvement is a yarn passageway having an elliptic cross-section which is further characterized as having a width to height ratio within the range from about 1.5 :1 to about 22:1 and sides, defining the width of said yarn passageway, which are the arc of a circle, said height of the yarn passageway being measured along the axis of the fluid conduits and said width being measured perpendicularly to the axis of the conduits and the axis of the yarn passageway at the intersection of the two axes.
  • yarn passageway through the body member extending 50 along a straight axis; feeding and withdrawing means for continuously forwarding the yarn at controlled positive tension along the axis through said passageway; directly opposed fluid conduits into said passageway in the body passageway to the diameter of a fluid conduit is from about 1.4:1 to about 1.75:1.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US639362A 1967-05-18 1967-05-18 Apparatus for interlacing multifilament yarn Expired - Lifetime US3426406A (en)

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US63936267A 1967-05-18 1967-05-18

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US (1) US3426406A (en:Method)
BE (1) BE715307A (en:Method)
CH (1) CH463690A (en:Method)
DE (1) DE1760444A1 (en:Method)
FR (1) FR1565936A (en:Method)
GB (1) GB1207732A (en:Method)
NL (1) NL148962B (en:Method)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3701248A (en) * 1969-02-24 1972-10-31 Du Pont Interlaced multifilament yarn
US3724199A (en) * 1970-04-20 1973-04-03 Monsanto Co Process for making continuous filament heather yarn
US3763643A (en) * 1969-03-17 1973-10-09 Rhone Poulenc Textile Novel high-bulk yarn
USRE28482E (en) * 1968-03-18 1975-07-15 Novel high-bulk yarn
US4100725A (en) * 1975-07-25 1978-07-18 E. I. Du Pont De Nemours And Company Yarn having alternating entangled and unentangled lengths
US4125922A (en) * 1977-09-22 1978-11-21 Techniservice Division, Textured Yarn Co. Inc. Jet tangler
US5184381A (en) * 1990-11-28 1993-02-09 Basf Corporation Apparatus for producing soft node air entangled yarn
US5195313A (en) * 1990-11-28 1993-03-23 Basf Corporation Method for evaluating entangled yarn
EP0784109A2 (de) 1996-01-12 1997-07-16 Maschinenfabrik Rieter Ag Verfahren und Vorrichtung zur Erzeugung eines mehrfarbigen Garnes aus unterschiedlich farbigen Teilfäden aus Endlosfilament
US6076345A (en) * 1997-02-26 2000-06-20 Maschinenfabrik Rieter Ag Method and apparatus for generating a yarn composed of at least two yarn components
DE10302079B4 (de) * 2003-01-21 2006-04-20 Corovin Gmbh Vorrichtung und Verfahren zur Herstellung von gekräuselten Spinnvliesfasern oder gekräuselten schmelzgeblasenen Vliesfilamenten aus geschmolzenem thermoplastischen Material

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1292972B (de) * 1960-08-04 1969-04-17 Nicolai Walter Einrichtung zur Anzeige von Undichtheiten an Lagerbehaeltern fuer Fluessigkeiten oder Gase
JPS5212362A (en) * 1975-07-18 1977-01-29 Toray Industries Fluid treatment apparatus
DE2918336C2 (de) * 1979-05-07 1985-04-18 Teijin Ltd., Osaka Texturierbares Filamentgarn sowie Verfahren zu dessen Herstellung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364537A (en) * 1965-09-07 1968-01-23 Du Pont Apparatus for interlacing multifilament yarn

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364537A (en) * 1965-09-07 1968-01-23 Du Pont Apparatus for interlacing multifilament yarn

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE28482E (en) * 1968-03-18 1975-07-15 Novel high-bulk yarn
US3701248A (en) * 1969-02-24 1972-10-31 Du Pont Interlaced multifilament yarn
US3763643A (en) * 1969-03-17 1973-10-09 Rhone Poulenc Textile Novel high-bulk yarn
US3724199A (en) * 1970-04-20 1973-04-03 Monsanto Co Process for making continuous filament heather yarn
US4100725A (en) * 1975-07-25 1978-07-18 E. I. Du Pont De Nemours And Company Yarn having alternating entangled and unentangled lengths
US4125922A (en) * 1977-09-22 1978-11-21 Techniservice Division, Textured Yarn Co. Inc. Jet tangler
US5184381A (en) * 1990-11-28 1993-02-09 Basf Corporation Apparatus for producing soft node air entangled yarn
US5195313A (en) * 1990-11-28 1993-03-23 Basf Corporation Method for evaluating entangled yarn
EP0784109A2 (de) 1996-01-12 1997-07-16 Maschinenfabrik Rieter Ag Verfahren und Vorrichtung zur Erzeugung eines mehrfarbigen Garnes aus unterschiedlich farbigen Teilfäden aus Endlosfilament
US6085395A (en) * 1996-01-12 2000-07-11 Maschinenfabrik Rieter Ag Method and apparatus for producing a multicolored yarn from differently colored part-threads of endless filament
US6094790A (en) * 1996-01-12 2000-08-01 Maschinenfabrik Rieter Ag Method and apparatus for producing a multicolored yarn from differently colored part-threads of endless filament
US6119320A (en) * 1996-01-12 2000-09-19 Maschinenfabrik Rieter Ag Method and apparatus for producing a multicolored yarn from differently colored part-threads of endless filament
US6076345A (en) * 1997-02-26 2000-06-20 Maschinenfabrik Rieter Ag Method and apparatus for generating a yarn composed of at least two yarn components
US6442923B1 (en) 1997-02-26 2002-09-03 Maschinenfabrik Rieter Ag Method and apparatus for generating a yarn composed of at least two yarn components
DE10302079B4 (de) * 2003-01-21 2006-04-20 Corovin Gmbh Vorrichtung und Verfahren zur Herstellung von gekräuselten Spinnvliesfasern oder gekräuselten schmelzgeblasenen Vliesfilamenten aus geschmolzenem thermoplastischen Material

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Publication number Publication date
NL148962B (nl) 1976-03-15
CH463690A (de) 1968-10-15
NL6804948A (en:Method) 1968-06-25
DE1760444A1 (de) 1971-12-30
FR1565936A (en:Method) 1969-05-02
BE715307A (en:Method) 1968-10-16
GB1207732A (en) 1970-10-07

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