US3606197A - Plural cycle cam yarn winding process and packages produced thereby - Google Patents

Plural cycle cam yarn winding process and packages produced thereby Download PDF

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Publication number
US3606197A
US3606197A US830054A US3606197DA US3606197A US 3606197 A US3606197 A US 3606197A US 830054 A US830054 A US 830054A US 3606197D A US3606197D A US 3606197DA US 3606197 A US3606197 A US 3606197A
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United States
Prior art keywords
yarn
package
reversal
reversals
cam
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Expired - Lifetime
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US830054A
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English (en)
Inventor
Richard L Akers
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EIDP Inc
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EI Du Pont de Nemours and Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H55/00—Wound packages of filamentary material
    • B65H55/04—Wound packages of filamentary material characterised by method of winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • FIG. l uggs-* le ,5 WW lo Pm RH -RH I /Z 2 l 9,- 3 5 7 I* TYD ONEREV.
  • nD oNE REv. I F l G. y
  • ABSTRACT F THE DISCLOSURE A process for winding yarn into a cylindrical-bodied package wherein the yarn is traverse Wound in layers of helical coils on a bobbin wherein the coils are laid down in their reversals in different shaped curves in a repeating progression throughout the winding of the package.
  • the corresponding stroke lengths of the coils with different shaped reversals may also be of different lengths.
  • This invention relates to the cross-winding of yarns and more particularly to the winding of cylindrical yarn packages with improved formation and stability.
  • packages are commonly formed by windups employing a surface drive.
  • the drive roll is operated at a constant speed thus maintaining a constant surface velocity of the driven package despite the growth of the package as the filamentous material is wound thereon.
  • a cam-actuated reciprocating traverse guide may be used to lay the yarn onto the bobbin in layers of helical coils either directly or by means of a print roll.
  • Package defects associated with currently used winding techniques appear to be related in some Way to yarn laydown at the reversals of the helical coils formed by successive traverse strokes in crosswinding a cylindrical yarn package.
  • the differently shaped reversals lare arranged in an alternate repeating progression throughout the package; for example, two or three of one kind of reversal followed by one or more of another kind repeated sequentially. Any sequential pair of reversals may also terminate at different stroke lengths.
  • the above object is accomplished by providing a method of winding yarn on a bobbin that includes the steps of rotating the bobbin while simultaneously traversing the yarn axially of the bobbin through successive strokes to form la package of layers of helical coils.
  • Each coil has substantially the same helix angle and is laid down at its reversal in a curve.
  • the improvement comprises lying down the coils in their relversals in differently shaped curves in a repeating progression throughout the winding of the package. This is accomplished by having a plurality of different traverse cycles formed in the traverse cam according to the repeating progression desired.
  • any yarn waves nearest to the end of the packages are more highly stable ones land are complementary to yarn waves spaced inwardly therefrom, and preferably the yarn Wave in at least one of the reversals in the progression is characterized by CII rice
  • FIG. 1 is a side elevation of a Kwinding apparatus useful in the practice of this invention.
  • FIGS. 2-7 are developed views of multi-cycle barrel cams.
  • FIG. 8 is a cross-section of a package wound with a single cycle barrel cam.
  • FIG. 9 is a fragmentary developed view of two yarn package reversals of different stroke lengths but essentially the same configuration formed in a two-cycle trarverse program.
  • FIG. l0 represents a cross-section of a package wound with two-cycle traverse program of FIG. 9.
  • FIGS. ll and l2 are fragmentary developed views of yarn package reversals with different configurations in successive yarn reversals with the use of outback in the yarn profile of the outer reversal indicated in FIG. l2.
  • the present invention is useful in a windup apparatus of the type shown in FIG. 1, which comprises a frame 13 which carries a cam assembly 10 and a fixed drive roll 5 coupled to a motor 6.
  • a bobbin 7 is situated on a support 8 which is carried on a pivoted arm 9 which is adapted to urge the bobbin 7 or the growing package 2 against the drive roll 5.
  • a typical cam apparatus 10 generally comprises a barrel cam 1 of diameter D on a shaft 11 mounted for rotation in bearings in fixed pedestals 19 to which are secured spaced, parallel guide rails ⁇ 4 which hold a cam follower-traverse guide 3 in engagement with a cam groove 14 in the barrel cam 1 thus Ibeing Iadapted to traverse yarn 15 as it advances from guide 16 toward the drive roll 5 and thence to the package 2.
  • the yarn is swept back-and-forth in a zig-zag pattern by means of the barrel cam 1 and deposited on the peripheral surface of the drive roll 5 which carries the yarn to the point of tangency with the bobbin 7 or package 2 where the yarn is deposited or printed on the surface of the package 2.
  • the yarn could, of course, be deposited directly on the package.
  • the barrel cam 1 is a generally cylindrical body having helical grooves of opposite hand in its peripheral surface which intersect and merge in curving reversals to form an endless cam groove.
  • multi-cycle cams which have a plurality of righthand (RH) and lefthand (LH) grooves which are arranged in alternation sequentially as further described below.
  • RH righthand
  • LH lefthand
  • one cam includes a plurality of cycles of different cam profile as will be described in detail.
  • the serially connected grooves in the surface of one cam barrel may number from two to about six or more, called dual cycle, triple cycle, quadruple cycle, etc.
  • a dual cycle cam is shown in a developed view, FIG. 2, and comprises two each RH and LH helices in alternation in a length of vrD representing the entire surface of a given cam of diameter D (FIG. 1); therefore the two cycles must be complete in a single revolution.
  • a triple cycle cam is shown in FIG. 3, the length of which is identical to the cam surface of FIG. 2 or, in other words, the cam barrels have the same diameter D.
  • each iigure shows the exact plural number of cycles in a given cam (which for any given cam is called a program) While the short section at the left with a length of vrD represents the circumferential surface of the cam. In this latter section all of the grooves of a given cam (i.e., the program) are depicted using dotted lines for that part of the program not contained in the first cam revolution. It may be seen that the use of a plural number of cycles introduces intersections in the grooves known as Crossovers which are negotiated readily by cam followers known to the art.
  • the individual successive cycles of a given cam having a plurality of cycles have different strokes and different reversal patterns; in addition, cams having three (or more) cycles each of different stroke length may have the various cycles arranged in different sequence from one cam to another.
  • the primary intent in providing these differences is to make the cycles comprising any particular program self-compensating in terms of the patterns of yarn laydown, as will be further described, so as to avoid package defects, e.g., hard shoulders, ridges on and inboard of the shoulders, soft ends or other regions, overthrown chordal sections and the like.
  • the invention contemplates a variety of cycle programs as enumerated in part in Table I in which each capital letter A, B, C, D, etc., represents a different type of cycle, i.e., a different reversal prole, while the separation of letters by a hyphen represents a difference in stroke length of the two cycles on opposite sides of the hypen.
  • successive reversals are tailored as to velocity profile and thus as to rate of yarn laydown so as to be complementary to each other in terms of quantity of yarn deposited on the package per unit of axial length.
  • the efficiency of yarn reversals may be defined in terms of the quantity (length) of yarn they contain between the terminii of the truly helical parts of the yarn path,
  • any conventional reversal of high efliciency may be used.
  • this reversal if used in a single cycle cam, will tend to wind a package having a profile in cross-section as shown in FIG. 8 Where a peripheral ridge or shoulder 18 appears; this is greatly exaggerated (10X or more) in its vertical or radial dimension for purpose of illustration.
  • Any ordinary or prior art type reversal will produce such a shoulder but the elfect may be minimized -by use of a maximum curvature (high eiciency) type reversal.
  • FIG. 9 comprising an inner reversal 19 and an outer reversal 20, then the resulting package profile will appear as in the cross-sectional view, IFIG. 10, and will now have two shoulders 18 and 23 at each end.
  • the inner shoulder 18 will be higher than the outer one due to the fact that the inner shoulder contains the yarn leading into and out of the outer reversals; this latter yarn in the region of the shoulder 18 for this embodiment lies in substantially purely helical paths and thus contributes significantly to the height of the shoulder 18,
  • the existence of outer shoulders of lower radial height than inner shoulders is highly disadvantageous for the reason that a yarn reversal being deposited on such a shoulder tends to lose tension which then leads to other difficulties.
  • the present invention preferably employs corrective compensation in the yarn profile of the outer or more stable reversal but substantially only in that part of the reversal which lies axially outside the inner reversal. Referring to FIG.
  • Cutback is also preferably employed on the opposite slope of the same outer reversal 28 but need not necessarily be employed contingent on the magnitude of inner shoulder buildup; that is, cutback may be used to merge into either the RH or the LH helical part of the outer reversal 28 or both. It will be realized also that the tangent 29 to the respective cutback curves at their inflection points may have different slopes consistent with acceptable levels of cam pressure angle or of rate of acceleration.
  • the program of the present embodiment preferably comprises two long-stroke, A type reversals for every one of the relatively shorter stroke B type reversals.
  • the same general plan is adhered to as in the dual cycle program, that is, the A type reversals are slow (but not as slow as in the dual cycle program), while the -B type preferably are of maximum efficiency, i.e., of greater curvature.
  • a process for winding yarn on a bobbin into a cylindrical-bodied yarn package including the steps of rotating the bobbin to wind yarn thereon and traversing the yarn axially through successive stroke lengths to form a package of layers of helical coils, each coil having substantially the same helix angle and being laid down in its reversals in a curve, the improvement comprising laying said coils down in their reversals in differently shaped curves in a repeating progression and at said substantially same helix angle.

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US830054A 1969-06-03 1969-06-03 Plural cycle cam yarn winding process and packages produced thereby Expired - Lifetime US3606197A (en)

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US83005469A 1969-06-03 1969-06-03

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US3606197A true US3606197A (en) 1971-09-20

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US (1) US3606197A (enrdf_load_stackoverflow)
CA (1) CA918608A (enrdf_load_stackoverflow)
DE (1) DE2027005A1 (enrdf_load_stackoverflow)
GB (1) GB1304028A (enrdf_load_stackoverflow)
NL (1) NL7007978A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690579A (en) * 1971-11-15 1972-09-12 Northrop Carolina Inc Textile thread winder with improved thread traversing mechanism
US3727855A (en) * 1971-04-05 1973-04-17 Leesona Corp Winding method and apparatus
EP0002528A1 (en) * 1977-12-16 1979-06-27 E.I. Du Pont De Nemours And Company Yarn winding apparatus for winding cross-wound yarn packages and method of winding advancing yarn
US4280667A (en) * 1979-10-18 1981-07-28 E. I. Du Pont De Nemours And Company Winding method and apparatus and product therefrom
US4586679A (en) * 1984-02-06 1986-05-06 Toray Industries, Inc. Yarn package of carbon filament yarn
US5044571A (en) * 1988-07-27 1991-09-03 Murata Kikai Kabushiki Kaisha Apparatus for winding yarn
US6065712A (en) * 1997-02-27 2000-05-23 Barmag Ag Method and apparatus for winding a yarn into a package
US11117737B2 (en) 2012-11-12 2021-09-14 Southwire Company, Llc Wire and cable package

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3471082D1 (en) * 1984-02-06 1988-06-16 Toray Industries Yarn package of carbon filament yarn and method for forming the same
DE19642618A1 (de) * 1996-10-16 1998-04-23 Sahm Georg Fa Vorrichtung zum Aufwickeln eines Fadens in Wildwicklung auf eine Auflaufspule

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727855A (en) * 1971-04-05 1973-04-17 Leesona Corp Winding method and apparatus
US3690579A (en) * 1971-11-15 1972-09-12 Northrop Carolina Inc Textile thread winder with improved thread traversing mechanism
EP0002528A1 (en) * 1977-12-16 1979-06-27 E.I. Du Pont De Nemours And Company Yarn winding apparatus for winding cross-wound yarn packages and method of winding advancing yarn
US4280667A (en) * 1979-10-18 1981-07-28 E. I. Du Pont De Nemours And Company Winding method and apparatus and product therefrom
US4586679A (en) * 1984-02-06 1986-05-06 Toray Industries, Inc. Yarn package of carbon filament yarn
US5044571A (en) * 1988-07-27 1991-09-03 Murata Kikai Kabushiki Kaisha Apparatus for winding yarn
US5143313A (en) * 1988-07-27 1992-09-01 Murata Kikai Kabushiki Kaisha Method and apparatus for winding yarn
US6065712A (en) * 1997-02-27 2000-05-23 Barmag Ag Method and apparatus for winding a yarn into a package
US6186435B1 (en) 1997-02-27 2001-02-13 Barmag Ag Method and apparatus for winding a yarn into a package
US11117737B2 (en) 2012-11-12 2021-09-14 Southwire Company, Llc Wire and cable package
US11858719B2 (en) 2012-11-12 2024-01-02 Southwire Company, Llc Wire and cable package

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Publication number Publication date
GB1304028A (enrdf_load_stackoverflow) 1973-01-24
DE2027005A1 (de) 1970-12-10
CA918608A (en) 1973-01-09
NL7007978A (enrdf_load_stackoverflow) 1970-12-07

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