US2647697A

US2647697A - Tandem chuck wind-up

Info

Publication number: US2647697A
Application number: US8789A
Authority: US
Inventors: Jr Frank Scott Pollock
Original assignee: EI Du Pont de Nemours and Co
Current assignee: EIDP Inc
Priority date: 1948-02-17
Filing date: 1948-02-17
Publication date: 1953-08-04
Anticipated expiration: 1970-08-04

Description

F. S. POLLOCK, JR

TANDEM CHUCK WIND-UP INVENTOR.

2 Sheets-Sheet 1 Filed Feb. 17, 1948 FRANKSCOTTPOLLOCHJ BY A 'I'TORNE Y Aug. 4, 1953 F. S. POLLOCK, JR

TANDEM CHUCK WIND-UP 2 Sheets-Sheet 2 Filed Feb. 17, 1948 INVENTOR. FRANK SCOTTPOLLOCK,

ATTORNEY Patented Aug. 4, 1953 hate-7 697 I ..I'IIIANDEM cuticle WIND-Ur Scott PolIock; Jr., si'gnov t0"-E;I .I\di1 Pont de 4 Wilmington,.Del.,.aa corporation of eelaware I 'AppIicationFebrua-ry 17, I948,,SerialNo. 8,789 lo eiaims. c1. zit-eels) Frame I I I This invention relates to Winding'machines and more particularly to the'winding, of filamentous structures; such as; a yarn". or thread or any" such continuous: filament; tya method and withapparatus which. are adapted to increase by a large amount) the capacity of industrial plantssuch; as texirlletplants. I I

B'y' ffi'lam'ent'ousstructures is meant monofllam ents; yarns; threads; strands, cords, ropes;

fibers and, the like; Accordingly; the structure maybe' coniposed." of a singlefilament or a pluralityof filaments; I

' In conventional 'windf-upoperations yarn or the'rlike'is' taken. from. the supply source, such as a; spihneret; and-is passedthrough-feed'rolls onto a: bobbin drivenby surface-contact with-a revolvirrg pdrlverolla The surface speed of the bobbin isith esameas' that-of thefldrivihg" roll. A single thread iswound in this way' on the bobbin at a certain speed. A single'traverseguide isused in the operation. Inithisimethodicapacity per unit can be increased only by. increasing. wind-up speeds While this method has been satisfactory, with increasing. production it has become desirableto increase wind-up capacityfurther. This could easily. be. done. by merely. increasing. the number ofiproduotion units.- In the interestsofi economy: iir' equipment and space such a procedure isnot commercially-- feasible.- Similarly; wind-up units are' normally) run at optimum speeds. and, additional. capacity; cannot. be. ob-- tained by. increasing. windy-up. speeds without some sacrifice such; as-a loss in. yarn. quality. or an. excessive increaseimmaintenance cost, I I

Accordingly, it..is an. obJectof/this. invention. to. provide.aamethod.= wherebn windi-uprcapacity may; be. greatiyincreased while; employingsubstantially the same amountuof. equipmentandzspacel It, is a; turthen obj ectto. provide a method for increasingz the: production capacity, of. each wind I up position; A. still? further object. isthe prop visiona of apparatus for the. winding of filamentousst ucturea at, greatlyincreased-,Q@ hecities,. to produce. packages. of high o1.uality,-.v It ,Ehese. andother-obj cts appearihereinafter,, I I

- Thesaobjects, are; accomplishedbupassing, as atunitha plurality c-ftfilamentous structures such threads; from: a; plurality ofi supply sources through; a; guide. mechanism such: as. a single traverseguide or ai-plunalitylof traverse guides I appropriately placed; and; then; passing each, structure;tcxsitstirespective win(it-upmore; such asta bobbin, spool} etc" -eachzorzvvhichiis.surface driven: by thee same;- 'driving roller; ultimate separation of tlie structures occ'urring at the-.peintzofzwinde- Martinsvillc; Va., as Ne'mours Gompanygup of one of the structures. For" example, two threads of a1 yarn are passedJfrQm a, supply source through a single traverse guide as one thread of yarn and then. into the nip formed by the first bobbin and the. drive roller; The threads are then separated":v one" threadis passed through the nip to; the. top surfa'cedriven bobbinandii's wound thereon,' and the otherthr'ead. is passed between the. top bobbin and the drive roller following" the drive. roll toa lower bobbin which is immediate= lybel'owi the upper bobbin and upon whichthe threadiisiwoundl By this invention it. is possible to cause a lurality of'filam'entous 'structuresto follow a. guidemechan-ism', running one. structure underneath one or more wind-up" cores and by so; doing. wind a. plurality of acceptable yarn packages in each wind-up pcsition without de creasing. the quality of the filamentous struc= tures The invention will. be more clearlyunderstdod by reference to the following figures'which illus trate. one of'various possible embodiments 05f my invention and ofwhich Eigure, 1., is! a front elevation of the tandem chuck wind-up of this. invention;

Figure 2 1's asection online 2-2 of. Figure 1, showing; the winding machine. of" this invention infer-eater detail; I

Figure 3 isasection on line-Si-K ofFigure 1;

showing the. upper and; lower bobbin operation in greaterdetail} I Figure.- 4.. isla detail sectional plan on line 4-4 of- Figure 5, e showing of. the brake mechanism: of the lower: bobbin;.

Figure: 5 is an elevation further showing the brake mechanism of the; lower bobbin. and.

Figureb is a-lsectional detailedvview of theycom pensating spring and; set. screw. employed. in the operation of the: upper bebbini In Figures 1;, 2, and 3; driving; roll-er- I v aflixed triand rotated by shaft 2 supported on-a trame. and driven by; aimotop neither of which'isshovvnz Driving roller-l drives azplurality ofupper bob-- bins 3: and: a plurality 0ft lower. bobbins 4- when its is: rotating? and thabobbins are in-surface. con, tacttwiths it. Thesupper bobbinstimay bemovedinto or out? of: surface: contact: by; the; pivotedT lever arm-bi These arms are pivotedin bearing contained-1h upright: l: which:- iSJbOItBd to the frame 81 Attached? at the; upper endoi: thelever: arm? 5i i'si a: brake: handle" 9 which; is pivoted; on lever: arm 5: at point H1: and: has": a: spring; N; at-- tached to. it;- and: to. arm; 5;. This; can; be. seen readily." in: Figure 2: Asseem as? the; bobbin 3; is:

' removedtfrom contact: with: the; driving roll the handle 9 and arm are gripped manually and squeezed together. This forces the brake shoe I3 hard against the inside surface of the chuck and the rotating chuck and yarn carrying bobbin come to a stop. At the same time the bobbin is pulled into the doff position shown in Figure 2 by dotted lines l2. The bobbin can then be readily removed and replaced by a fresh bobbin. As shown in Figure 1, affixed to the lever arm 5 is a counter weight I4 which cooperates with compensating spring I5 which is attached to the frame member I6 (see Figures 3 and 6). This spring is of the compression type and tends to push the bobbin 3 away from the drive roll. The force is exerted on set screw I1 fixed in arm 5. This screw is adjusted so that the counter-weight and the spring coact throughout the wind-up in such a manner that the pressure of the rotating bobbin on the drive roll is carefully controlled. Since a free falling bobbin, spool, chuck or core would damage the roller I, an arresting screw l8 attached to frame member 16 is provided to stop any such bobbin before it hits the roll, thereby preventing damage.

From an examination of Figure 2 it can be seen that the upper bobbins 3 rest on drive roller I to some extent by force of gravity at the start of the wind-up and it moves away from roller I while. yarn collects on it. The dotted circular line I9 shows the bobbin 3 in one position after wind-up for a given time. The dotted circular line I2 shows the bobbin in doff position. The lower bobbin 4, however, is not held against roller I by gravity and a somewhat different construction is preferred. Unlike the upper counter weight I4, the lower counter weight 20 is not attached directly to its corresponding lever arm, the lower bobbin pivoted arm 2I. Counterweight 20 and lower arm 2I are pivotally connected through the rod 22 and bearing 23, all being supported by the frame upright member 1. Thus, as the bobbin 4 moves away from roller I, the arm 2I drops downward and the counterweight 20 moves upward.

' Lower compensating spring 24 is attached to arm 2 I .at point 25 and to the frame member I6 at point 25. As yarn builds up, the bobbin 4 moves away from the roller l, the frictional contact being supplied by successive layers of yarn on the bobbin. The spring 24 and lower counterweight 20 are so designed that they coact to keep the bobbin 4 throughout wind-up held against roller I and exerting a certain optimum pressure. A yarn carrying position of the bobbin 4 is shown by dotted line 21 and the doff position by dotted line 28. Like the upper chuck, the lower is prevented from being inadvertently allowed to fall on roller I by the arresting device or set screw 23 which is attached as shown to the frame member I6, as shown in Figure 2. The arrangement of lower bobbins 4 and counter-weights, etc. may also be seen in Figure 1. It is, of course, within this invention to employ other mechanical devices which are equivalent to the pivoted mountings for the wind-up cores, or to the pressure regulating, co-acting counter-weights and compensating springs, or the arresting devices, or guide mechanism or the brake mechanisms.

The rotation of the lower bobbin 4 may be stopped by operation of a brake device similar to that described above for the upper bobbin 3. However, a slightly different construction is utilized for proper spacing. The spacing must permit the ready removal and insertion of the bobbins. The figures, as, for example, Figures 1 and 2, show the position of the lower grip affixed to lower pivoted arm 2 I. By gripping this rod 30 and pulling downward, the lower bobbin may be moved to doff position 28. Lower brake handle 3| and lower brake shoe 32 may be seen in greater detail in Figures 4 and 5.

The yarn travel may be seen most readily in Figure 2. A plurality of filamentous structures 33, such as yarns, coming from a source (not shown) such as a spinneret pass through the slot 34 of a traverse guide mechanism 35. For convenience the apparatus has been diagrammed to show how two yarns have been handled. After the two yarns have passed through the traverse guide as a single unit one thread 36 is wound up on upper bobbin 3. The other designated as 31 passes between the upper yarn cake 38 (shown in Figure 1) and the drive roller I. It then passes around a portion of roller I and between the nip of roller I and lower bobbin 4, and is then wound on bobbin 4 to form lower cake 38. Thus, the lower thread 39 surprisingly follows the traverse guide mechanism 35 even though the thread passes through a tortuous path. It is in frictional contact at three places, first between the roller I and the upper yarn cake 38 then with roller I to bobbin 4 and again between the roller I and the lower yarn cake 39. In spite of this, yarn quality is not sacrificed. No noticeable difference can be detected in the physical properties of the yarn in cake 38 nor in that of cake 39 when compared to each other or to yarn wound in a conventional manner using a comparable, but single threadand a single bobbin similarly driven. Further, very high speeds can be employed to produce this high quality yarn. This is, indeed, a surprising result when one considers the pressure exerted at the points of frictional contact and the additional contact of yarn on yarn. The table below indicates the efliciency of the process:

Tabla-(Nylon yarn) peed Br k/ Brk Fna li i es s ejec s or Yards/Min. Pound fi Brk.Fila.,

' Percent Tandem l, 200 0. 51 0.08 0. Standard 967 0.56 0.10 1.10

1 Two cakes per bobbin (twin cake process).

Thus, results equal to old process are-obtained by this invention and this is true even if the yarn speeds are higher. Cost analysis indicates that a 75% reduction over standard wind-up processes and equipment may be obtained by this invention. The combination of high yarn quality and high production rate makes this invention of outstanding value.

The process and apparatus of this invention, thus, provide for exceedingly unexpected results. The winding of yarn in this manner at high speeds without snagging, breakage, wrapping on wrong bobbins, poor bobbin formation, relaxing non-uniformly ,etc. is indeed surprising. As mentioned above the pressure exerted on the roller I by the bobbins should be carefully controlled for best results. This pressure depends, in part, upon the kind of filament being wound. For yarn, the pressure depends, among other factors, on the denier of the yarn being processed. The pressure can be as low as 500 grams and as high as 5000 grams. For example, for 20 denier polyamide yarn it is preferred to adjust the coacting counter weights and compensating springs so that apressure of 1700; grams is; exerted; on a 5 inch linear surface; If too high a pressune is. used: the packagesifiatten out and-lose thcie formation. If too: low a presenceis used; thepackage may run slowly causing yarn breaks to occun on the feed. roll, or a build-up of soft yarn package that flattens out may occur resulting :againfin poor formation. While pressures: higherand. lower than. those indicatedmay be employed; it: is preferred for most purposes tot use pressures between about 100: grams. and woe. per-inch of'linear surface. As indicated-in. the table excellent: results are obtained. in this: invention-using a yarn. speed of 1.200. yds. per min. The invention: isnot limited. in. this: respect and lower orhigher speeds. may be employed. lln iact,-the=tandem chuck wind-i up of this invention:- may be used at. any speed: where a standard tree: driven bobbin can. be. used."'-'.-

Noris the invention limited. to thettype of." filament being wound. Theyarns may: bathose prepared from natural; materials: such as: wool, cotton or silk or they may. be: synthetic: mate-. rials prepared from cellulose. derivatives, such as cellulose: acetate or fromothenpolymeric. materials including viscose, acrylonitrile polymers, polyamides, polyesters; polyester-amides, or vinyl polymers; such: as: vinyl: chloride. polymers. Likes. wise filaments from inorganic. materials, such. as

metallic. wires. may: be: wound on the apparatus of this invention. The. filaments. processed. may vary-widely in. size. For example, nylon. yarns iirom. 66 to. 1000; denier .Cundrawn yarn). have. been wound successfully by: the, process of. this. intention, .The process and apparatus of this; invention may, of; course. be; used in connection. withdrawing processes: and machines. The vari- 01.18.138.1l7sz0fi the apparatus may bemade of any appropriate material, such. as. metals.v alloys, D1318.- tic, glass, enamels, etc.

- 'lifhe apparatus may tie-adapted toprocess more. than two. filamentous; structures. simultaneously; For example, for each position two-additional. bobbins can. be. run, one upper bobbin. positioned. opposite.- bobbin; 3 and another lower bobbin op.- posite bobbin t. Further; the.- diameter of. the; driving rollercan. be greatly increased; to ac-.-. commodate one or more-bobbins. between uppen bobbin 3'. and: lower bobbin 4:. Also. the length of thedrive roller'may be; very large: The. ptoca r ess and apparatus of this invention therebypro vide means for greatly increasing plant capacity; The wind-up capacity is doubled pen-unit lengthof drive roll: when using" two. bobbins in tandem, is tripled when using 3 bobbins in tandem, etc. For example, machines are usually designed so that there-iszone wind-up bobbin for each spinneret. A specific denier must be produced, al.- though the spinneret is capable of producing light or heavy deniers. In comparing thestandard method of spinning oneendof40 denier and winding to one bobbin as against spinning '80 denier, splitting to two ends oi 40 den-Tier, and winding each end to a separate bobbin of two in tandem, the output per position is doubled. ThuS there results an outstanding advantageous economy in space, equipment. ,and time The. a ove description; has-shown the; operation of this invention using a single traverse guide. While the use of only one traverse guide is highly desirable in the interests of space and equipment, it is possible and occasionally desir able to employ as the guide mechanism a plurality of traverse guides. For example, two traverse guides may be used, one in front of the 1 bar and spaced 0.5 inch apart.

a 34 of thread: guide 35'.

respectively; Two thread thereon; passing the remainder other. Further, two. traverse guidesmay. be used: one along side of theother and, fastened to; the same traverse bar; In winding bobbins from warps using thislatten arrangement, a desirable uniform; displacement of threads across: the roll surface occurs. To illustrate, each: of: LOiends spacedv 0.5. inch apart. from a. warp. 4.5 inches wide are passed individually through. a. traverse guide, the 1'0: guides: being on the same traverse Ten Wind-up bobbins are placed one behind theother withtheir center lines offset 0.5 inch from the leading bobbins, thereby accomplishing the desired displacement. Still further if: two sets of threads 2 are to be. wound on opposite sides of the same bobbin drive roll, theuse of. a second traverse barand' asecond guide is. desirable.

For example, a yarn. comprising four filaments A, B, C, and D. can be passed! through the: slot: Thread A may be: passed to bobbin 3: in a. manner similar to yarn 362. Thread 33. may be wound on. bobbin It like yarn: 3?. Similarly threads. C and D may be passed: to. bobbins located; opposite tobobbinsv 3 and; 4 guides may be used it desired.

The process and apparatus of this invention may also be used'tobreak up aplurality ofi filamentous structures into smaller pluralitiesp For eexample, a structure comprising filaments may be wound so that: '75. 0f the filaments: are wound on the top bobbin. 3" and the remainder on. the bottom. bobbin 4. Packages so. produced are; useful. in. further operations, either inv fur-then separations or in. recombina-tions. to fomn. strands;

cords; etc. It. is. also; possible. to. form more than onecake on. a. bobbin. Forexample, a total: of six unit, filamentous structuues of. 66'. denier each is fed. to; the. apparatus; so. that two. unit. structures go to; each. of: three guide mechanisms. situated. abovethe upper bobbin: 3; and; a: sufficient: distance apart toallow for. a. convenient; space between the cakes. Three cakes are formed onv the uppers bobbinfiirom. a unitstructurepassing thru each oi? the: three; guides; and the remaining; 3 unit;

stnuctures pass. in. the usual? manner to lower" bobbin. t; and. are wound. thereon: to formthreeindividualcakes. The apparatus and process of" this. invention-.- permit .a. large variety of. wind-ups.

Any; departure .from theabove description which conforms to the present invention is intended to be included Within the scope of the claims.

Iclaimz .1.v A processfor winding, filamentous structures which; comprises. surface driving a core on upper section of a:- rotating drive roll; surface driving: a. second core on. a lower section of said rotating drive roll; passing a plurality ofsaid structures through. a. guide. mechanism and then. through the nip termed: by the said: upper windup core. and said drive roll; separating: a. portion oi. said structures. from. said. plurality;- passing this portion: to, said;v upper core and Winding it of? said plurality. through.- they nip formed; by said: lower wind up core. and. said: drive. roll; and-5 windingsaid remainder on; said: lower; core.

2. A process for winding filamentous structures which comprises rotating an upper wind-up core on an upper section of a rotating drive roll; rotating a lower wind-up core on a lower section of said drive roll; passing a plurality of said structures through a guide mechanism and then through the nip formed by said upper core 7 and said drive roll; separating a portion of said plurality; passing this portion to said upper core and winding it thereon; passing the remainder of said plurality through the nip formed by said lower core and said drive roll; separating a second portion of said plurality; passing this second portion to said lower core and winding it thereon; and repeating the process until the final portion of said plurality is wound separately on a core.

3. A process in accordance with claim 2 in which the pressure exerted on the said drive roll between the said wind-up cores is controlled.

4. Apparatus for separating and winding on individual cores filamentous structures travelling in a group which comprises a traversing guide; a drive roll having a smooth surface; an upper wind-up core surface-driven on an upper section of said drive roll to receive a portion of said structures; a lower Wind-up core surface-driven on a lower section of said drive roll to receive another portion of said structures; and a guide comprising a section of said smooth surface on said drive roll, said section being exposed between said upper and said lower wind-up cores to contact the portion of said structure that by-passes one of said cores in its travel to the other of said cores.

- 5. A plurality of the apparatus in accordance with claim 4 arranged in tier fashion 6. Apparatus in accordance with claim 4 containing pressure regulating devices for said upper core and for said lower core.

7. Apparatus for separating and winding on individual cores a plurality of filamentous structures which comprises, in combination, a drive roll having a smooth surface; an upper wind-up core surface-driven on an upper section of said roll to receive a portion of said structures; in a lower position in respect to said upper core, a lower wind-up core surface-driven on a lower section of said roll to receive another portion of said structures; a guide for simultaneously traversing a portion of said plurality of said structures on said upper core and a portion of said plurality of said structures on said lower core as each portion is wound on its respective core; and a guide comprising a section of said smooth surface on said drive roll, said section being exposed between said upper and said lower wind-up cores to contact the portion of said structure that bypasses one of said cores in its travel to the other of said cores.

8. Apparatus for separating and winding on individual cores a plurality of filamentous structures which comprises, in combination, a drive roll having a smooth surface; an upper wind-up core surface-driven on an upper section of said roll to receive a portion of said structures; in a lower position in respect to said upper core, a lower wind-up core surface-driven on a lower section of said roll to receive another portion of said structures; pressure regulating devices for said upper core and for said lower core; a guide for simultaneously traversing a portion of said plurality of said structures on said upper core and a portion of said plurality of said structures on said lower core as each portion is wound on its respective core; and a guide comprising a section of said smooth surface on said drive roll, said section being between said upper and said lower wind-up cores and being exposed to contact the portion of said structure that by-passes one of said cores in its travel to the other of said cores.

9. Apparatus for separating and winding on individual cores a plurality of filamentous structures which comprises, in combination, a drive roll having a smooth surface; an upper wind-up core surface-driven on an upper section of said roll to receive a portion of said structures; in a lower position in respect to said upper core a lower wind-up core surface-driven on a lower section of said roll to receive another portion of said structures; counter-weights and compensating springs for said upper core and for said lower core; pivoted mountings for said upper core and for said lower core; a guide for simultaneously traversing a portion of said plurality of said structures on said upper core and a portion of said plurality of said structures on said lower core as each portion is wound on its respective core; and a guide comprising a section of said smooth surface on said drive roll, said section being exposed between said upper and said lower wind-up cores to contact the portion of said structures that by-passes one of said cores in its travel to the other of said cores.

10. Apparatus for separating and winding on individual cores a plurality of filamentous structures which comprises, in combination, a drive roll having a smooth surface; an upper wind-up core surface-driven on an upper section of said roll to receive a, portion of said structures; in a lower position in respect to said upper core a lower Wind-up core surface-driven on a lower section of said roll to receive another portion of said structures; counter-weights and compensating springs for said upper core and for said lower core; pivoted mountings for said upper core and for said lower core; arresting devices for said upper and said lower cores; a guide for simultaneously traversing a portion of said plurality of said structures on said upper core and a portion of said structure on said lower core as each portion is wound on its respective core; and a guide comprising a section of said smooth surface on said drive roll, said section being exposed between said upper and said lower wind-up cores to contact the portion of said structures that bypasses one of said cores in its travel to the other of said cores.

FRANK SCOTT POLLOCK, JR.

References Cited in the file of this patent UNITED STATES PATENTS Number Name 1 Date 427,696 Klots et al May. 13, 1890 1,595,818 Bliss Aug. 10, 1926 1,655,155 McKean Jan. 3, 1938 2,129,411 Duncklee Sept. 6, 1938 2,211,954 Lewis Aug. 20, 1940 FOREIGN PATENTS Number Country Date 6,347 Great Britain Mar. 14, 1912 13,824 Great Britain Aug. 1, 1900