US3478975A - Web winding apparatus - Google Patents

Description

Nov. 18, 1969 w. R. PENRoD 3,478,975

WEB WNDING APPARATUS 'Fled Oct. 2, 1967 2 Sheets-Sheet 1 /NVENTOR WILLIAM R. PENROD ay /z/ my@ ATTORNEYS lNv. 18, 1969 w. R. PENRoD 3,478,975

WEB WINDI NG APPARATUS Filed Oct. 2, 1967 2 Sheets-Sheet 2 FIG-2 United States Patent O 3,478,975 WEB WINDING APPARATUS William R. Penrod, Fulton, N.Y., assignor to The Black- Clawson Company, Hamilton, Ohio, a corporation of Ollio Filed Oct. 2, 1967, Ser. No. 672,101 Int. Cl. B65h 67/04 U.S. Cl. 242--64 8 Claims ABSTRACT F THE DISCLOSURE BACKGROUND OF THE INVENTION In Winding a web of non-porous material, such as plastic lm, onto a core of a turret Winder, it is desirable to prevent air from being entrained between wraps so that succeeding Wraps do not produce side slipping of the wraps and t-hereby produce a poorly wound roll. It is common to employ a rider roll for this purpose 4which is supported adjacent the turret winder and engages the outer surface of the Winding roll to squeeze out air which would otherwise be entrained between the oncoming web and the winding roll.

The rider roll is also commonly used in conjunction with one or more enveloping rolls to form a cluster of rolls around an empty rotating core at the web transfer station for providing a good no-fold back start on the core when the web is severed. After the start is completed, the enveloping rolls are retracted, but the rider roll remains in contact with the winding roll and moves outwardly as the winding roll increases in diameter. When the winding roll has reached its desired diameter and it is time to bring in a new core, the rider roll is moved away from the Winding roll to provide for indexing of the turret. During the time interval while the rider roll is moved away and the turret is indexing, the web winds poorly on the winding roll due to the problem of air being entrained between the wraps.

SUMMARY OF THE INVENTION The present invention is directed to an improved turret Winder wherein each of the cores has a corresponding auxiliary rider roll` carried by the turret. These auxiliary rider rolls are used primarily during the time the mainv rider roll is retracted from the winding roll for indexing the turret so that air continues to be squeezed out from between the oncoming web and the rewinding roll during indexing of the turret to, bring a new core into a web 3,478,975 Patented Nov. 18, 1969 or a winding roll. The frame supporting each auxiliary rider roll is rotated by a set of air cylinders pivotally mounted on the turret and connected by levers to the shafts supporting the frame. Air at a constant pressure is supplied to each of the air cylinders, and each counterbalanced auxiliary rider roll thus produces a constant pressure against the rewinding roll on its corresponding core during the entire time that the turret is being rotated or indexed.

Other features and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view of winding apparatus constructed in accordance with the invention and Showing the major components in position for transferring the web from a full winding roll to an empty rotating core;

FIG. 2 is an enlarged fragmentary end view of the turret shown in FIG. 1 with the nearest core support arm removed;

FIG. 3 is an elevational view of a portion of the turret taken generally along the line 3-3 of FIG. 2; and

FIG. 4 is a schematic view of the apparatus during indexing of the turret.

Description of the preferred embodiment The winding apparatus shown in FIG. 1 generally includes a core enveloper 10 which is supported by a set of rails 11 and includes a frame 12 supporting guide rolls 13 and 14. A pair of parallel spaced arms 15 are pivotally connected to the frame 12 by pins 16 and support a main rider roll 18 and a guide roll 19. The arms 15 are movable by means such as suitable air cylinders (not shown) to move the main rider roll 18 along an arcuate path 20.

The core enveloper 10 also includes a pair of parallel spaced arms 22 which have inner ends pivotally connected by pins 23 to the piston rods of corresponding uid cylinders 25 pivotally connected to the frame 12 by pins 26. An enveloping roll 28 is supported by the outer ends of the arms 22, and power operated screw jacks 30 are connected to the arms 22 by pins 31 for moving the enveloping roll 28 along an arcuate path '32. A pair of arms 33 are pivotally connected to the arms 22 by pins 34 and support another enveloping roll 35. The arms 33 are moved relative to the arms 22 by corresponding air cylinders 36 mounted on the arms 22 and having piston rods 37 pivotally connected to the arms 33.

A Winder has a 4base 46 mounted on the rails 11 and includes a pair of parallel spaced pedestals or end stands 48. A turret has a main center shaft 52 rotatably supported by bearings mounted on the upper portions I of the stands 48 and includes a pair of parallel spacedV ar-ms 54 which are mounted on the main shaft 52 for supporting a pair of diametrically spaced parallel cores 55. Each of the cores 55 is driven through a belt, chain or similar drive 56 connected to a corresponding motor`57 mounted on one of the arms 54. The center shaft 52 of the turret 50 is also connected to a suitable drive motor (not shown) for rotating or indexing the turret vto 'move each of the cores 55 between a web transfer station A` and a roll unloading station B. f l

The turret 50 also includes another pair of parallel spaced arms 60 which are positioned inboard of the arms 54 at an' angle of approximately 70 therewith. The'arm's 60 support a pair of diametrically spaced freely rotating guide rolls 62. A pair of laterally projecting plates 64 are -mounted on each arm 60 in diametrically spaced relation, and each set of corresponding plates 64 support a set of aligned bearings 65.

A pair of U-shaped frames are positioned between the arms 60, and each frame 80 includes a pair of parallel spaced arms 82 rigidly connected by an H-beam 83. A pair of aligned shafts 84 project outwardly from the arms 82 of each frame 80 and are supported by the corresponding pair of aligned bearings 65 to provide for rotating each frame relative to the arms 60. Each of the frames 80 supports an auxiliary rider roll 85 having journals 86 rotatably mounted within bearings 87 secured to the projecting ends of the arms 82. Referring to FIG. 2, the shafts 84 are connected to the corresponding arms 82 approximately midway between the -beam 83 and rider roll 85, and the size and weight of the beam 83 are selected so that each rider roll 85 is precisely counterbalanced on the axis of the shafts 84 by the corresponding beam 83.

A crank arm 90 (FIG. 2) is rigidly connected to the outer end of each shaft 84, yand each crank arm is pivotally connected by a pin 91 to a clevis 92 mounted on the end of a piston rod 94 extending from an air cylinder 95. The air cylinders 95 are pivotally supported by studs 96 mounted on the outer ends of the corresponding arms 60.

During winding of a roll R at station A, the web W of material is directed through the core enveloper -around the guide rolls 13, 14 and 19 and through a nip formed between the main rider roll 18 and the winding roll R. When a winding roll R has almost reached its desired diameter, the roll change control button is pushed to start the drive motor 57 for the new core 55 and cause the turret 50 to -begin rotating counterclockwise (FIG. 4). Simultaneously with the rotation of the turret 50, the auxiliary rider roll 62 for the winding roll R moves into contact with the Winding roll by actuation of the corresponding cylinders 95, 'after which the main rider roll 18 is raised along the path 20.

When the new core 55 of the turret 50 reaches a position approximately from the web transfer station A, the turret stops and the enveloping rolls 28 and 35 are raised toward their respective positions shown in FIG. 1. After the enveloping rolls 28 and 35 are positioned, the turret continues to index until the new core 55 arrives at station A and the winding roll arrives at station B. The main rider roll 18 is then lowered to form a nip with the new rotating core 55. Since an auxiliary riding roll 62 remains in contact with the riding roll R during the full indexing of the turret, the web W will continue to be wound smoothly on the roll R without air being entrained between the wraps.

To ysever the web W and to start a new roll R, a knife and wiper mechanism (not shown) carried by the larms 22 is actuated causing it to move along an arcuate path indicated by the line 98 (FIG. 1). Adjustment of this path for different sizes of cores is accomplished by adjusting the cylinders 25 which moves the pivot pins 23 for the farms 22. As the web is severed, the leading end of the web is wiped into the nip formed between the new rotating core and the main rider roll 18, and a new roll is started.

The arms 22 and 33 are rotated to retract the corresponding enveloper rolls 28 and 35, and the new roll R continues to form at station A while the main roll R remains in nip relation with the roll. In some installations, it may also be `desirable to bring the corresponding auxiliary rider roll 85 into contact with the roll R during winding at station A. While a new roll is forming, the' full roll R is unloaded at station B and a new core 55 is -mounted on the arms 54. The sequence is repeated when the winding roll R approaches its desired diameter at the web transfer station A.

From the drawings and the above description, it can be seen that a winder constructed in accord-ance with the invention provides several desirable features and advantages. For example, the provision of a counterbalanced auxiliary rider roll 85 in turret 50 for each of the cores 55 and a constant pressure air supply to the corresponding air cylinders 95 causes the auxiliary rider roll 85 to apply a constant pressure against the winding roll R during the entire time the turret 50 is being indexed to move the winding roll R from station A to station B and the new rotating core 55 from station B to station A. As a result, the final wraps made on the winding roll R are smooth and uniform, and it is necessary to scrap the rst few hundred feet of the web on the roll R.

The U-shaped frame supporting each auxiliary rider roll also provides desirable features. That is, with the arms 82 rigidly connected with the H-beam 83 and the shafts 84 positioned at the center of gravity of the assembly, not only is each la-uxiliary rider roll 85 precisely counterbalanced, but the beam 83 connects the arms 82 to provide substantial rigidity so that the corresponding auxiliary rider roll 85 is maintained parallel with its corresponding core 55 during rotation of the frame 80. The construction of each frame 80 and its rotation by the corresponding air cylinders 95 through the crank arms also provide a compact and simplified structure which assures dependable operation with minimum maintenance.

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made therein without departing from the scope of the invention.

What is claimed is:

1. In apparatus for continuously winding a web of material and including a turret having means supporting a plurality of cores in parallel spaced relation, and means rotatably supporting said turret for moving each said core between a roll unloading station and a web transfer station, the improvement comprising a rider roll for each said core, a frame supporting each said rider roll in parallel spaced relation to its corresponding core, means mounted on said turret and pivotally supporting each said frame to provide arcuate movement of each rider 2. Apparatus as defined in claim 1 wherein each said4 frame is U-shaped and comprise parallel spaced arms, wherein said counterbalancing means comprise a beam member rigidly connecting said arms to maintain parallelism between the corresponding said rider roll and said core, said beam member being positioned relative to the,

pivot axis of said frame for counterbalancing the corresponding said rider roll.

3. Apparatus as dened in claim 1 wherein said turret comprises a center shaft and said supporting means for each said frame includes a pair of parallel spaced arms mounted on said shaft, a pair of diametrically spaced guide rolls mounted on said arms, a set of aligned bearings mounted on said arms for each said frame, shaft means being connected to each said frame and-supported by the corresponding said set of bearings, said fluid cylinder means comprising a pair of air cylinders mounted on said arms for each said frame, and lever means connecting said shaft means tothe corresponding saidl air cylinders.

1 l 4. Apparatus asdened in claim 3 wherein each said frame extends between the said pair of arms of said turret; n j

`5. Apparatus asdefined in claim 1 wherein said turret comprises a center shaft, a rst pair of parallel spaced arms mounted on said shaft, means on lsaid rst pair of arms for supporting a pair of diametrically spaced said cores, means for rotating said cores, a second pair ofl parallel spaced arms mounted on said shaft and positioned in angular relation to said first pair of arms, a pair of diametrically spaced guide rolls mounted on said second pair of arms, two of said frames supporting correspending said rider rolls, and diametrically spaced pivot means mounted on said second pair of arms for supporting said frames.

6. Apparatus as defined in claim 5 wherein each said frame is U-shaped and includes parallel spaced arms rigidly connected by a beam member forming part of said counterbalancing means, and said pivot means is positioned for rotation of each said frame between said second pair of arms.

7. Apparatus as defined in claim 6 wherein said uid cylinder means comprise a pair of air cylinders pivotally mounted in diametrically spaced relation on each of said second pair of arms, and said pivot means includes aligned shafts connected to said arms of each said frame, a lever connected to each said shaft, and means connecting each said lever to the corresponding said air cylinder.

8. Apparatus as dened in claim 1 in combination with a main rider roll, means spaced from said turret and supporting said main rider roll for movement between a position forming a nip with one of said cores located at said web transfer station and a retracted position spaced from said core, at least one enveloping roll, and means supporting said enveloping roll for movement between a position adjacent one of said cores located at said web transfer station and a retracted position spaced from said core.

References Cited UNITED STATES PATENTS 2,970,786 2/ 1961 Justus et al 242-56 X 3,228,621 1/ 1966 Ryan 242-64 3,266,744 8/ 1966 Volm et al. 242-64 3,291,412 12/ 1966 Rockstrom et a1 242-65 GEORGE F. MAUTZ, Primary Examiner

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