US2943803A - Traversing roll - Google Patents

Description

July 5, 1960 Filed Nov. 7 1956 W. V. HENRY TRAVERSING ROLL 2 Sheets-Sheet 1 INVENTOR. MAL MM .V #67109 Mam W. V. HENRY TRAVERSING ROLL July 5, 1960 2 Sheets-Sheet 2 Filed Nov. 7, 1956 IN V EN TOR. AMI/mum? {Z EBA b rv 2,943,803 atented July 1 h EiledjNov. 1, 1956,, se Q0915 c ams; i-zizeslj This. invention relates, to. grooved rolls for "traversing Moreo er, he plat pro ct utw i iro t e V rotating roll and t e ef re aiet a i srousfs s yarnyduring the winding of a package and more particularly to improved groove: surfaces more resistant to the wear caused by contact of yarn as it travels through and is guided by the groove.

In theiwinding of yarn into package forrn'it is .known to provide a cylindrical roller with an endless helical cam groove in the outer surface thereof, to pass the running yarn chordwise of the cylinder within the groove and to rotate "the cylinder'thereby causing traversal of the yarn along the take-up package at a speed'commensur-ate'with that of the yarn. With a traversing roll of' y vide an imp ov trav sing-ro l no imparts a concentrated sliding wear on the wall surface of the groove. In .orderto. extend the useful life, so

to speak, ofthe traversing roll, it-has been-proposed to eent example of this is shown'in U.S ;;1Patent NQ.,.2.736.-

506,..datecl February;2-8,' 1956.

Althoughthe guide pins of the aforesaid patent obviate to a large extent wear caused bysliding of theyarn'iover that portion of the groove wall; it has now heen' found that an even more concentrated wear occurs at other areas along the .groove'which areas heretofore were not protected hy. guide Epins or any other-imeans. For .example; both a sliding and a rubbing action between the yarn and cam groove occur along the bottom surface at the rapid reversal portions and along certain outeredges of the groove, whereas the'yarn never .contaets and therefore wear rarely occurs along the walls o the groove ex ep at th r versal portions thereof. The reason for this is thatthe yarn is continuously shifted laterally although there is a momentary dwell at the end of each traverse stroke.

When the traversing roll is used with a high speed iir oo visitin toashioe has oper in u wa ly M19 me ers est ii -i u eutoie smp s e aio e ii ii io d s idhis a d ru bing ct o the a n on the cam groove, presents a veryserious maintenance problem,- With a .stahcia ii trav rsing r o l i as rf om aluminum it ha hssnfliound tha r m and e pec a y nyl n, stually cuts o saw in o .s rtoiu aces of h gro e th n. a

period of 12-15 weeks of continuous useL'RSince sucha 1 rou hene ur aces ha m ul o the ya n Prod-u t e tires or b eaks in t e ute fila ents h soft he worn trave in oll ust e repa red or r placed at th .iit t si hs fw'sa I view of th erious is h s o t :pro leiu a number of ech q e a be d v e n onset tooverc m iis ss ve g ve wear.

i as been su es ed, o x mp e th t e urfa e oi the groove he ohioms p a e Alth u h h gh an oprat. on has adv ntage .tro a theore cal st hsip iiitfi has the disadvantage s h-sins expen e n in a -impe tion andalso in maintenance. Even though a plated even when the? ame i in l pe a i hi t ha be n sugges e fu her o mou t cast iron-P ates long por ion f t g o v whe n; wear is e y to' osur- S ch Plates have. ot p s vs y sa is a or however, fo th reason that t e yarn does. not thi si iii? as well as when using conventional 'traveraipg-rol y i6 an pe at r who mu k ep thsisutiaos at he" One of, the o j c s of the p e ent inv iitioo is t setdisadvont g s such as d scuss d abov Another Object of t is invention is t 'provide ravers ing r ll having improv d wea -resista t q ities- Still anoth r. O ject of the pre e t invent on i to PIQ- vide a traversing l having ws res t yerozoonta ing membe s d h sesi a st at gic points alo g he surface of the cam groove, I

In ac rdance with th p esen inv nti n th heli al cam grooveo a slam r ve s neroli is ,ch n' ele taigu the outer "edges thereof which are icontao ewhy the r n Yarn and. a w ar-resistant-g ide W r e zieri Within these-channels: Mor over, in he pre e red hirihodimen of this inven ion, the helical camero ve is provided with both'IadiaI and axial guide pins at each of the rapidreversal's o on i This provides suhstantiia y flush wearkre i tan y m-con ac gisurta s which ar ne p nsive to manufac ure and whi h are asy to install as. well as to replace when s h is fo n t uboaeoessary or desirable. e v i hsrUobieQts an fur her. advan ages of the pr sen inventionwwii ecotn ppa ent upon oonsideratiou'of the followi g detail d description a. pre erred emh ii tnent thereof in' oni no t the accomp ny ng draw ngs; wherein Fi u 1 is a view in elevation showing one sp cific us of a traver ing rol c ns ru t d in ccorsianoe with the p esent teac ings;

' igur 2 is an e ev t on vi w of one f the raversing cams shown in Figure l and showing also the loeat ,n of npl 'antz wear-resi ant ra som-ac ing memb, s;

E su e 3 s a ect ona v ew t ke a ong he line :3t.-3 o F g r 2 an s owi th m ner in whic th guide wi i secu ed hin th ohh i;

Figur 4 is as stional view ake along th li e ail-:4 of F gure 2 and sh win in detail the relation hip between the suit-is. p ns, g ide wire an groove at one of the a ii evsrsai sect o s; a d V sh s 5 i n e ation view of the wsa res stan .v us a o th oute ode i the s m ioovs- Oos instance wh i p cants imp o ave sin o h ishis a anta eou us is in th hi h as o n lo Y m immstiistsi sits thsssia su ormssi a s i ii nsa ra us wh sh o the average, approximates 900 meters per minute. -Eigroll clean 7 3 the yarn is vibrated laterally along the surface of take-up spool 12 to form a package. Two of these packages are shown inasmuch as the rollers are usually mounted in tandem. Since these rollers are identical, further that one, side of the groove functions to traverse the yarn in one direction and the opposite side traverses the yarn in the opposite direction. The helical groove 13, as shown, is provided with two quick reversal portions 14 in order to prevent excessive build-up of the yarn layers at the respectiveen'ds of the take-up package; As pointed out hereinabove, it has now been found that wear occurs not only along the vertical wall of the groove at these rapid reversal portions but also along the bottom thereof. Moreover, when using only the radial pin suggested in said US. Patent No, 2,736,506, it has been found that concentrated wear occurs along the bottom surface of the groove immediately adjacent to the radial pin. 7

In accordance with the present teachings, a wearresistant radial guide pin 15 is mounted-so as to project slightly outside the surface of groove wall 16 at the high point of each of the rapid reversal sections, as shown in Figure 2. The. disposition ofpin 15 is such that the yarn 11 is maintained free from contact with the wall 16. In order to mount-this pin, a radially extending channel is cut or otherwise formed in the surface of the wall, after which the pin 15 is inserted therein and locked into position by means to be described hereinafter. In cooperation with each of the radial pins 15, it has been found expedient to mount a wear-resistant axial guide pin 17 in and projecting slightly outwardly of the bottom surface 18 of groove 13 at each of the reversal portions 14. These pins 17 may be mounted in a manner similar to that discussed above in connection with pins 15, and serve the purpose ofmaintainingthe yarn 11 free from contact with the'bottom surface 18. Usually the aperture through which the pins 17 are mounted is closed by known plug means to prevent accidental dislocation of the pins therefrom. It has been found that pins 17 function more effectively if placed adjacent the radial pins and on the leading or forward side thereof relative to the direction of rotation of traverse roller 10, as indicated by the arrow in Figure 2. While the aforementioned axial and radial pins serve to eliminate wear occasioned along the wall and bottom surface of groove 13, it has been found that even a more pronounced sliding and rubbing action resulting in wear occurs along certain outer edges of the groove. As mentioned previously herein, at any given instance, only one wall of groove 13 functions to shift the yarn laterally for winding purposes. Thus, certain areas of the groove rarely, if ever, come into contact with the yarn and wear .along the surface'of the groove at these areas is inconsequential. With respect to the yarn contacting surfaces, however, concentrated wear detrimental to the usefulness of the traverse roller has been found to exist and novel means is provided herein to' overcome this problem.

Along the outer edge of the efiective yarn traversing surface of the groove wall 16 there is mounted a wearresistant guide wire 20. It has been found-that chrome plated steel is particularly adaptable for such use. Any other suitable wear-resistant Wire could of coursebe used. In order to condition the roller 10 for reception of guide wire 20, a channel is formed, by machining, die

casting or any other suitable means, along the outer edge of wall 16, said channel having overlapping lip portions cast aluminum traverse roller.

21 and 22 between which the wire 20 may be pressed. Communicating with each end of the channel is an oblique aperture (not shown) through which the ends 23 of wire 20 may projected, after which these ends are struck over or bent as shown by dotted lines in Figure 5, this action drawing the wire snugly into the channel. The roller 10 is hollow, with suitable supporting webs, which permits accessof a hammer or other suitable instrument for striking over the projecting ends of wire 20 into the dotted line position shown. If desired, the wire 26 may also be'cemented into the channel provided therefor. It has been found that cement from the epoxy or epon class operates quite well for this purpose.

While the immediately preceding description co'ncerned mounting of guide 20 in the outer edge of wall 16, it is apparent that it is equally applicable to mounting of the guide wire along the outer edge of wall 24 inasmuch as the technique is the same in each operation.

As evidenced by Figure 3, the guide wire,20 projects slightly above the plane surface of the groove wall 24. This reduces contact between the yarn and wall and therefore prevents excessive wear. Inasmuch as the yarn is passed chordwise through the groove (see Figure l), the most concentrated wear occurs along the outer edges heretoforementioned, whereas wear along the walls of the groove, with the exception of the rapid reversal portio'ns, is distributed over a much wider area and, insofar as can be determined, is not critical.

Each of the guide wires 20 is shown as extending approximately degrees around the surface of roller 10. The wall 16 shifts the yarn to the left, as viewed in Figure 2, and has no effect on the return stroke, whereas the converse is true of wall 24. Consequently, it has been found that each wire 20 need extend only from the trailing edge of one rapid reversal portion substantially through the other reversal portion. As a matter of fact, in actual practice or during operation of the improved traverse roller described herein, it has been found that the yarn jumps from the rapid reversal portion to a point approximately five inches there behind. Thus, it is not absolutely essential that guide wires 20 extend the full 180 degrees around the roller although such might be desirable when operating the roller at lower speeds of rotation.

Figure 4, which is a section taken substantially along the high point of one of the rapid reversal portions 14,

illustrates the relative disposition of the axial guide pin 17, the radial guide pin 15 and one of the guide wires 20.

It can be seen that radial pin 15 is locked against dis- Example It was found that the above described invention operated very successfully when applied to a known die- This roller was of the hollow drum type such as that shown in Figure 2, 13% inches in diameter and with a continuous helical groove formed in the outer surface thereof. The groove had a depth of 1 inch and a width /2 inch, and the traverse stroke was 2% inches.

To this traverse roller was added, at each of the points of rapid reversal, two inch diameter radial pins and two A inch diameter axial pins, the pins being made from wear-resistant Alsimag. The guide wires were constructed of A2 inch diameter chrome plated steel of a length to extend up to 180 around the traverse roller, beginning approximately two inches behind one radial guide pin and extending in the direction of rotation to a point approximately four inches from the other radial suitable apertures provided in the roll and were struck over, as explained hereinabove, to secure the wires in the channels. Cement from the epoxy class was used to facilitate this mounting. The average yarn speed was 900 meters per minute and the direction of rotation of the roller was counter to the rotation of the take-up bobbin, as shown by the arrows in Figure 1. The package was surface driven from a conventional drive roller, not illustrated in the drawing.

It has been found that a traverse roller ot the type described hereinabove has a useful life many times longer than that of known rollers. Moreover, the maintenance on such a roller is extremely simplified and made more economical. The guide pins and wires may be easily replaced if worn or broken without repairing the surface of the roller or without the use of expensive machinery and skilled operators. Moreover, the down time for such repairs is greatly reduced from that previously re quired. The overall result of the foregoing is that much more compact and uniform packages are produced from the traverse roller for longer periods of operation.

It is understod that the description of the above embodiment is for purposes of illustration and is not intended to limit the scope of this invention except to the extent defined in the claims.

What is claimed is:

l. A yarn traversing roll comprising a rotatable cylinder having a helical cam groove in the outer surf-ace thereof, said groove having two rapid reversing sections, and a wear-resistant member embedded in the outer edge of said groove and extending from a trailing edge of one rapid reversing section through the other rapid reversing section, said wear-resistant member projecting from said outer edge into yarn-contacting position.

2. A yarn traversing roll as set forth in claim 1 wherein said wear-resistant member is formed of chrome plated steel wire and extends approximately 180 around the rotatable cylinder.

3. A yarn traversing roll comprising a rotatable cylinder having an endless helical cam groove in the outer surface thereof, at least one wear-resistant yarn-contacting guide extending radially of said cylinder along one 6 wall of said groove, at least one wear-resistant yarn-contacting guide extending axially of said cylinder adjacent the radial guide and along the bottom surface of said groove, means defining successive channels in alternate outer edge portions of said groove, and a wear-resistant yarn-contacting member positioned within each of said channels.

4. A yarn traversing roll comprising a rotatable cylinder having an endless helical cam groove in the outer surface thereof, said groove having first and second reversing sections, a wear-resistant yarn-contacting guide extending radially of said cylinder along one wall of said groove at each of said reversing sections, a wear-resistant yarn-contacting guide extending axially of the cylinders adjacent to the radial guide and along the bottom surface of said groove at each of said reversing sections, means defining a first channel in one outer edge portion of said groove and extending longitudinally thereof from the trailing side of said first reversing section substantially through the second reversing section, a wear-resistant yarn-contacting member positioned within said first channel, means defining a second channel in the other outer edge of said groove and extending longitudinally thereof from the trailing side of said second reversing section substantially through the first reversing section, and a wear-resistant yarn-contacting member positioned within said second channel.

5. A yarn traversing roll comprising a rotatable cylinder having an endless helical cam groove in the outer surface thereof, means defining successive channels in alternate outer edge portions of said groove, and a wearresistant member secured within each of said channels and projecting therefrom into yarn-contacting position, said member extending at most around the cylinder.

References Cited in the file of this patent FOREIGN PATENTS 380,512 France Oct. 10, 1907 50,368 France Jan. 16, 1940 (Addition to No. 800,883)

214,587 Switzerland Aug. 1, 1941

Images