US2572904A - Apparatus for winding - Google Patents

Description

Oct. 30,'1951 E. K. BAUER APPARATUS FOR WINDING Filed April 6, 1946 INVENTOR. ERNEST K. BAUER BY 'l A Patented Oct. 30, 1951 UNITED STA'EE PATENT OFFICE APIPARATUS FOR WINDING Ernest K. Bauer, Meadville, Pa., assigner to American Viscose Corporation, Wilmington, Del., a

corporation of Delaware 18 Claims.

The present invention is concerned with methods and apparatus for winding and has as its main object maintaining a uniform pressure on the winding periphery during the winding operation.

While it has heretofore been suggested to maintain such a uniform pressure by using either a pneumatic or hydraulic fluid-pressure means, the devices of the prior art had the disadvantage that if a slight distortion'at some part of the periphery of the winding, such as a bulge, occurred, the fluid-pressure device would tend to vibrate as a result of allowing the pressure element to be moved outwardly from the axis of the winding at the position of the bulge and then to return toward the axis of the winding as it left the bulge. During high speed winding, the fluctuations of the pressure elements that result from hitting one or more such bulges about the periphery, tends to cause chattering or vibration and an unsatisfactory winding in spite of the tendency of the fluid-pressure means to maintain a constant pressure against the winding.

It is the main object of the present invention to avoid such iluctuations of the pressure element and in doing so, it has been found that a more satisfactory winding is obtained, any localized bulges occurring during the winding being more or less subdued rather than accentuated by the improved operation in accordance with the invention. Other objects and advantages of the invention will be apparent from the drawing and the description thereof hereinafter.

In the drawing, which is illustrative of the preferred embodiment for carrying out the invention- Figure 1 is a side elevation with parts broken away of a beamer to which the invention has been applied, and

Figure 2 is a plan View of the beamer as shown in Figure 1.

In general, the present invention involves winding a material, such as one or more yarns; which may or may not be traversed relative to the rotatable element upon which winding occurs, while maintaining a pressure roller against the periphery of the winding and controlling the pressure of the roller by fluid means. The pressure roller is displaced outwardly from the axis of the winding element during winding by virtue of the increase in diameter thereof but the pressure roller is not allowed to return toward the axis of the winding element at any time during the Winding thereof. If there is any slight bulge of the win-ding periphery, such bulge displaces the pressure roller from the axis of the winding element and the fact that it is a bulge tends to make the displacement slightly greater than the properly laid portion of the winding which is unbulged. However, this tendency to greater displacement is counteracted to a certain extent by the inertia of the pressure roller so that the bulge tends to be minimized by compaction of the pressure roller. However, after the bulged portion has turned past the pressure roller, the pressure roller is not allowed to return toward'the axis of the winding element, so that the balance of the next convolution is allowed to be compacted to a slightly less extent than ordinary to compensate for the different diameters of the bulged and unbulged portions. By such a winding procedure, the bulges cannot be accentuated but tend to be evened out and a more satisfactory final package is obtained.

As shown in the drawing, the invention is applied to a beamer to which a sheet of yarns is fed, such as from a creel. When winding a warp sheet, there is generally no traverse applied to the yarns. However, the invention is also applicable to the winding of a single yarn while traversing the yarn back and forth axially of the package. It is, of course, applicable also to the winding of two or more yarns side by side by traversing them. It may also be used in machines for Winding fabrics, sheets, such as of paper or cellophane, etc.

With reference to Figures l and 2, the rotatable winding element 2 is constituted of a warp beam. This beam is mounted with its axis 3 rotatable in suitable bearing elements 4 carried on the frame 5. A pressure roller 6 has trunnions 1 mounted rotatably in the plates 8 of a yoke carried by the twoside rods 9. This yoke pivots about an axis I0, and one or more rods Il (two being shown), coupled to the cross bar I2 of the yoke for the pressure roller 5 by means of pivotal joints I3, are connected to pistons I-i operating in cylinders I5.

The pressure in the cylinders back of pistons I4 which urges the pressure roller 6 against the periphery of the winding may be derived from a uid contained in tanks i6 which are connected to the back end of the cylinders by means of conduits Il. The pressure of the fluid within the tanks I6 may be controlled by means of a regulating or reducing valve I8 in a line I9 connecting the tanks It to a source of high pressure fluid. The line I9 is connected to two branches 20 leading to the tanks I6. While the fluid contained in tanks it may be liquid, such as oil, it is preferably a gas, such as air, for reasons which will be explained more completely hereinafter.

The cylinder ends near the pressure roll are connected by lines 2l to the bottom of a reservoir tank 22 which contains a check valve 24 and a by-pass line 25 containing a valve 2B.

Because of the swinging motion of the pressure roll support, the cylinders l5 are mounted for pivotal motion about axis 21 and the lines I'I and 2l are of flexible material, such as rubber of synthetic rubbers.

Suitable means is provided for driving the winding element, and as shown this may comprise a motor 28, a reduction gear 29, shaft 38, sprocket 3|, chain 32, and sprocket 33 secured to shaft 3.

The yarns Y to be wound pass over a guide, such as roller 34, which may or may not be traversed, to the region near the nip of the pressure roll with the winding periphery, i. e. adjacent the position of accretion.

The operation may be described as follows: In starting position the beam 2 is practically empty and the pressure roll 6 is urged into contact with the first turn of winding by virtue of displacement of pistons Id to the extreme right as viewed in Figure l. In this position, the pressure back of pistons Ill is maintained at the desired value by the reducing valve I8. As stated heretofore, it is preferable to use tank l5 as an air dome or accumulator, but one could also have a liquid supply within tank Iii suflicient to more than completely ll the portion of the cylinder back of piston Ill when the elements are in their starting position as just described. When operating with a liquid in tank I6, it may be desirable to connect the top of tanks I to a supply of compressed air or other gaseous medium rather than a compressed liquid for the purpose of maintaining the pressure on the system. By using compressed air whether or not it works upon a volume of liquid extending into the regions of the cylinders back of pistons It, the assembly may have somewhat the action of a dashpot and the inertia exerted by the system. in resisting the compressive force exerted by the piston when the pressure roll strikes a sudden bulge, tends to flatten the bulge. I1 the liquid supply in tanks IS were to be omitted and merely a gaseous medium provided, any dashpot effect would be negligible. Of course, it is possible to have the entire system back of pistons III lled with liquid. rIhis applies to the cylinders, lines l'i, tanks I5, lines 2l! and I9. This would cause the exertion of a maximum force of inertia tending to reduce any sudden bulges.

At the start of operation, with the pistons I4 at the extreme right of cylinders i5, valve 26 is closed and a check valve 23 allows liquid to flow by gravity from the tank 22 into the right ends of the cylinders to keep the space in front of the pistons Ill constantly filled with liquid. 'Since liquid is non-compressible the piston can only move in one direction away from beam.

As winding proceeds, the pressure roll 6 swings and causes piston I4 to move back in the cylinder. This occurs under substantially constant pressure controlled by the regulating valve I8 and liquid flows into the right ends of cylinders I5 to keep these ends full of liquid constantly. In case the pressure roll rides over a bulge or high spot in the winding, the fluid back of pistons I4 tends to reduce the bulge by virtue of inertia and by virtue of the fact that the liquid must ow through the conduits I'I. After leaving the high spot, the pressure roll cannot return because of the fact that the right ends of cylinders I5 are full of liquid and the check valve closes against the return of. liouid to tank 22. As explained hereinabove, this evens out the winding convolutions and produces a more satisfactory package.

When the winding is completed, the beam 2 can be replaced with an empty beam and pressure rolls 6 may be returned merely by opening the valve 26. This by-passes the liquid around the check valve so that pistons I4 return to the right end of the cylinders under the pressure derived from the reducing valve I8.

It is to be understood that changes and variations may be made without departing from the spirit and scope of the invention as dened in the appended claims. 4

I claim:

1. In a winding machine, a rotatable element for receiving a winding thereabout, a rotatable pressure roller adapted to bear against the winding periphery, means for mounting the element and roller for relative movement to vary the distance between their axes, constant pressure uid means for urging the roller periphery against the Winding periphery, and hydraulic means for preventing relative movement of the roller and element toward each other during displacement by virtue of increasing diameter of winding on the rotatable element.

2. In a winding machine, a rota-table element for receiving a winding thereabout, a rotatable pressure roller adapted to bear against the winding periphery, means for mounting the element and roller for relative movement to vary the distance between their axis, constant pressure pneumatic means for urging the roller periphery against the winding periphery, and hydraulic means for preventing relative movement of the roller and element toward each other during displacement by virtue of increasing diameter of winding on the rotatable element.

3. In a winding machine, a rotatable element for receiving a winding thereabout, a rotatable pressure roller adapted to bear against the winding periphery, means for mounting the element and roller for relative movement to vary the distance between their axes, constant pressure hydraulic means for urging the roller periphery against the winding periphery, and hydraulic means for preventing relative movement of the roller and element toward each other during displacement by virtue of increasing diameter of winding on the rotatable element.

4. In a winding machine, a rotatable element for receiving a winding thereabout, a rotatable pressure roller, means for movably mounting the roller, constant pressure iiuid means for urging the roller periphery against the winding periphery of the rotatable element, and hydraulic means for preventing return movement of the pressure roller during its displacement by virtue of increasing diameter of winding on the rotatable element.

5. In a winding machine, a rotatable element for receiving a winding thereabout, a rotatable pressure roller, means for movably mounting the roller, constant pressure pneumatic means for urging the roller periphery against the winding periphery of the rotatable element, and hydraulic means for preventing return movement of the pressure roller during its displacement by virtue of increasing diameter of winding on the rotatable element.

6. In a winding machine, a rotatable element for receiving a winding thereabout, a rotatable pressure roller adapted to bear against the winding periphery adjacent the position of accretion, means for movably mounting the roller, constant pressure hydraulic means for urging the roller periphery against the winding periphery of the rotatable element, and hydraulic means for preventing return movement of the pressure roller during its displacement by virtue of increasing diameter of winding on the rotatable element.

7. In a winding machine, a rotatable element for receiving a winding thereabout, a support, mounting means pivotally connected to the support, a pressure roller mounted rotatably in the mounting means whereby the pressure roller is swingable toward and away from the element, constant pressure iluid means for urging the roller periphery against the winding periphery of the rotatable element, and hydraulic means for preventing return movement of the pressure roller during its displacement by virtue of increasing diameter of winding on the rotatable element.

8. In a winding machine, a rotatable element for receiving a winding thereabout, a rotatable pressure roller, means for swingably mounting the roller, constant pressure pneumatic means for urging the roller periphery against the winding periphery of the rotatable element, and hydraulic means for preventing return movement of the pressure roller during its displacement by virtue of increasing diameter of winding on the rotatable element.

9. In a Winding machine, a rotatable element for receiving a winding thereabout, a movably mounted pressure roller adapted to bear against the winding periphery adjacent the position of accretion, a cylinder, a piston reciprocable in the cylinder, means connecting the roller to the piston for simultaneous interdependent movement, means for maintaining a uid under constant pressure in the end of the cylinder away from the roller, means for maintaining the other end of the cylinder full of liquid during displacement of the piston away from the roller, and means for preventing any appreciable reduction in vol' ume of the licuid in said other end of the cylinder during the winding.

10. In a winding machine, a rotatable element for receiving a winding thereabout, a movably mounted pressure roller adapted to bear against the winding periphery, a cylinder, a piston reciprocable in the cylinder, means connecting the roller to the piston for simultaneous, interdependent movement, means for maintaining a uid under constant pressure in the end of the cylinder away from the roller, a liquid supply reservoir above the cylinder, a conduit from the reservoir to the end of the cylinder toward the roller, and a check valve in the conduit permitting flow of liquid from the reservoir to the cyl- 1i-)nder but preventing now in the opposite direcion.

11. In a warping machine, a rotatable element for receiving a winding thereabout, a rotatable pressure roller adapted to bear against the winding periphery adjacent the position of accretion, means for mounting the element and roller for relative movement to vary the distance between their axes, constant pressure fluid means for urging the roller periphery against the winding periphery, and hydraulic means for preventing relative movement of the roller and element toward each other during displacement by virtue of increasing diameter of winding on the rotatable element.

12. In a warping machine, a rotatable element for receiving a winding thereabout, a support, mounting means pivotally connected to the support a pressure roller mounted rotatably in the mounting means whereby the pressure roller is swingable toward and away from the element, constant pressure fluid means for urging the roller periphery against the winding periphery of the rotatable element, and hydraulic means for preventing return movement of the pressure roller during its displacement by virtue o increasing diameter of winding on the rotatable element.

13. In a warping machine, a rotatable element for receiving a winding thereabout, a movably mounted pressure roller adapted to bear against the winding periphery adjacent the position of accretion, a cylinder, a piston reciprocable in the cylinder, means connecting the roller to the piston for simultaneous interdependent movement, means for maintaining a Huid under constant pressure in the end of the cylinder away from the roller, means for maintaining the other end of the cylinder full of liquid during displacement of the piston away from the roller, and means for preventing any appreciable reduction in volume of the liquid in said other end of the cylinder during the winding.

14. In a warping machine, a rotatable element for receiving a winding thereabout, a movably mounted pressure roller adapted to bear against the winding periphery, a cylinder, a piston reciprocable in the cylinder, means connecting the roller to the piston for simultaneous interdependent movement, means for maintaining a gaseous fiuid under constant pressure in the end of the cylinder away from the roller, means for maintaining the other end of the cylinder full of liquid during displacement of the piston away from the roller, and means for preventing any appreciable reduction in volume of the liquid in said other end of the cylinder during the winding.

15. The machine of claim 1 in which the pressure roller presses the winding periphery adjacent the position of accretion.

16. The machine of claim 3 in which the pressure roller presses the winding periphery adjacent the position of accretion.

17. The machine of claim 4 in which the pressure roller presses the winding periphery adjacent the position of accretion.

18. In a winding machine, a rotatable element for receiving a winding thereabout, a rotatable pressure roller adapted to bear-against the winding periphery, means for mounting the element and roller for relative movement to vary the distance between their axes, constant pressure means for urging the roller periphery against the winding periphery, and hydraulic means for preventing relative movement of the roller and element toward each other during displacement by virtue of increasing diameter of winding on the rotatable element.

ERNEST K. BAUER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,463,181 Vorderwinkler July 31, 1923 1,787,323 Reiners Dec. 30, 1930 1,795,506 Reiners et al Mar. 10, 1931 2,196,000 Richardson Apr. 2, 1940 FOREIGN PATENTS Number Country Date 100,720 Sweden Jan. 21, 1941 301.903 Great Britain May 9, 1929 414,396 great Britain Aug. 2, 1934

Images