US2787427A

US2787427A - Web winding machine

Info

Publication number: US2787427A
Application number: US340301A
Authority: US
Inventors: John A Marczincsin
Original assignee: Black Clawson Co
Current assignee: Black Clawson Co
Priority date: 1953-03-04
Filing date: 1953-03-04
Publication date: 1957-04-02
Anticipated expiration: 1974-04-02

Description

April 2, 1957 J. A. MARCZINCSIN WEB WINDING MACHINE Filed March 4, 1953 INVENTOR JOHN A. MARCZINCSIN ATTORN EY WEB WINDING MACHINE John A. Marczincsin, Fulton, N. Y., assignor to The Black-Clawson Company, Hamilton, Ohio, a corporation of Ohio Application March 4, 1953, Serial No. 340,301

3 Claims. (Cl. 242-56) This invention relates to winders for web materials, and it has special relation to continuous winding apparatus for plastic film.

The invention is especially related to the transfer of a plastic web from a completed roll in a continuous winder to a new core for the purpose of starting winding on the new core without reduction in speed. It is important in handling such materials, particularly in the case of thin plastic film, to establish an even start of the web on the core without having the material fold back on itself, since if there is a fold back or like objectionable edge condition on the starting end of the web on the core, the resulting uneven thickness of material on the core tends to emboss, wrinkle or otherwise undesirably impress the succeeding layers of material wound thereover. This condition is especially noticeable in handling thin or soft plastic film, since fold back on the core may result in impressing a sufiicient number of layers of the film in the roll to spoil a considerable length of film.

It is a primary object of the present invention to provide apparatus and a method for continuously winding plastic and other web materials which will assure a smooth and even start of the web on each new core and which will eifect continuous control and guiding of the web to the roll as it winds thereon in such manner as to give smoothly and evenly wound rolls under high speed operating conditions with minimum tendency to undesirable pressure conditions throughout the winding roll.

An additional object of the present invention is to provide a continuous winder for web materials wherein the mechanism for transferring the advancing web from a full roll to a new core includes a guide member such as a guide roll mounted for movement from a retracted position to an advanced guiding position located between the new core and the full roll and in spaced relation with the new core such as to cause the web to envelop or wrap considerably more than one-half the circumference of the core, and wherein the actual transfer of the web is effected by a knife member movable in the space between the core and the guiding member in the direction of rotation of the core and in such manner as to sever the web in this space and to cause the resulting leading end of the web to start winding on the core.

A further object of the invention is to provide such a continuous winder for web materials wherein the knife member for severing the web is carried by the movable guide member for movement with the guide member between its retracted and advanced positions and is also movable with respect to the guide member in its advanced position through the space between the guide member and the new core for carrying out its cutting and web directing steps.

It is also an object of the invention to provide a continuous winder for web materials in which the web transferring mechanism is brought to its advanced position before actuation of the knife in order to enable the operator to check conditions before the web is cut, and

V 2,787,427 Patented Apr. 2, 1957 also in which the stroke of the knife is both quick and short to minimize shock and to complete the web transfer with minimum possibility of developing fold back or other uneven conditions at the start of the roll.

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

In the drawing- Fig. 1 is a somewhat diagrammatic view in side elevation showing a continuous winder constructed in accordance with the invention;

Fig. 2 is a schematic view illustrating the web transferring mechanism of the winder of Fig. l and showing the parts in normal winding position;

Figs. 3, 4 and 5 are further diagrammatic views illustrating several stages in the cutting and transferring of the web to a new core; and

Fig. 6 is an enlarged fragment of Fig. 5.

Referring to the drawings, which illustrate a preferred embodiment of the invention, Fig. 1 illustrates a continuous winder of the general type referred to above. The base frame indicated generally at 10 supports a reel including a shaft 11 and a pair of arms 12 at each end of the shaft adapted to carry a plurality of cores on which the web material is to be wound, and Fig. 1 shows the reel as supporting a substantially full roll 13 and a new core 15. The reel arms 12 at the back of the winder also support a pair of motors connected through transmissions 21 with core supports, such as spindle noses (not shown), to drive the cores at the same surface speed as the advancing web 22 to be wound. The reel shaft 11 is rotatably supported on the frame it) and is provided with means such as the motor 25 and driving connection shown diagrammatically at 26 in Fig. l for rotating the reel to carry successive new cores to the roll starting position while simultaneously carrying the filled roll to the top position shown in Fig. 1 for removal and replacement by an empty core.

The web 22 is guided to the winding roll around an anvil roll 30 and a guide roll 31 both carried by arms 32 pivotally mounted in the frame by a rock shaft 33 and carrying counter-weights 34 at their lower ends. Movement of arms 32 between their retracted position indicated in dotted lines in Fig. 6 and their normal operaating position is controlled by a fluid pressure cylinder 35 mounted on the frame and connected with shaft 33 through the pistion rod 36 and lever 37. The arm 32 at the front of the winder is shown as carrying a yardage counter 40 driven by roll 30 through a sheave 41 and belt 42 for registering the amount of web material wound on each roll.

The anvil roll 30 acts as an upper enveloper roll dur ing roll changing, and there is also a lower enveloper roll 44 carried by arms 45 which are pivotally mounted in the frame on a rock shaft 46 controlled by a hydraulic cylinder 47 as shown. The roll 44 is driven at the same surface speed as the web by a motor 50 connected through chain 51 with a double sprocket 52 on shaft 46 from which a chain 53 drives sprocket 55 on the journal of roll 44. The roll 44 and the anvil roll 30 act together to establish the position of a new core for starting Winding, and they also control the passage of the web during roll starting as described hereinafter.

The web transferring mechanism is indicated generally at 6 and is carried on the ends of a pair of curved arms 61 pivoted on the frame and operated by fluid pressure cylinders 62 shown as supported in the frame on brackets 63. This mechanism includes a guide roll 65 mounted for free rotation on a shaft 66 carried by the ends of the arms 61. Thus when the arms swing from their retracted positions shown in Figs. 1 and 2, they carry the guide roll 65 to an advanced position located between the new core grams? and the full roll, and the arms are so proportioned that in this advanced position, the guide roll 65 is spaced out of contact with the new core by a distance of at least several inches as clearly shown in Figs. 5 and 6.

The knife blade 70 for severing the web during transfer extends the full width of the web and is carried by short arms 71 secured to the shaft 66. The knife 70 is thus movable through an arc of short radius, and means are provided for swinging arms 71 to carry knife 7% through this arc. Such means are shown as including a fluid pressure cylinder 72 mounted on one of arms 61 by a bracket 73, and the piston rod carries a rack 75 meshing with a pinion 77 on shaft 66. The knife arms 71 also carry a brush 80 located behind blade 70' and thus operable to swing in following relation with the knife on its cutting stroke.

The several views in the drawing illustrate diagrammatically the operation of the winder to wind a roll of the web material and then to effect transfer of the web from a full roll to a new core. Fig. 2 shows the normal winding position with the winding roll 13 nearing completion. During this operation, the arms 61 and the roll 44 are retracted. The speed of the motor 2!) driving roll 13 is controlled in a suitable manner to maintain constant surface speed of the winding roll, and such means are shown diagrammatically as including a dancer roll 85 supported by a loop of the web between

winders

86 and 87 and having a cooperating counterweight 88. Since such speed controls are well known, more detailed description thereof is believed unnecessary.

While the roll 13 is thus winding as shown in Fig. 3, a new core 15 is loaded in the upper pair of reel arms, and When the roll 13 is substantially completed, the roll changing cycle is initiated, which may be done automatically through a starting switch actuated by the yardage counter 40 or by a manual push button switch. The motor driving the new core 15 is started to bring the new core up to web speed at the start of the roll change, and also the arms 32 are rocked to retract the anvil roll 30 to a position outside of the path of rotation of the reel as shown in Fig. l to permit the reel to be rotated to a positon bringing core 15 to the roll starting position.

Rotation of the reel is stopped when the new core 20 reaches the roll starting position, and anvil roll 30 is then returned to its normal winding position. This movement of the reel will bring the rotating new core 15 into engagement with the web running to the winding roll 13 and, the return movement of roll 30 will guide the web into overlapping relation with a substantial portion of the new core as shown. Next the arms 45 are raised to bring the roll 44 into pressure engagement with the new core to hold the traveling web against the core preparatory to the severing and transferring steps, and Fig. 5 shows the parts in these relative positions.

After these positions of the core and the enveloper rolls are established, the cylinder 62 is actuated to raise the arms 61 as shown in Figs. 3 and 4. As noted, the pro portions of the parts are such that the guide roll 65 engages the side of the web opposite the core, and the advanced position of this roll is beyond the center line between the new core and the full roll so that the web is caused to envelop considerably more than 180 of the core and effectively overlies its iii-running nip with the core. Fig. 4 shows the parts in these positions, but the knife arms are still retracted so that the web continues to wind on the full roll.

The operator can accordingly establish these positions for the web cutting and transferring parts and hold them in those positions until he has checked the roll positions and accurately determines when the actual web cut should be made. At such point, he actuates the knife cylinder 72 to rock the shaft 66 and thus execute the cutting stroke of the knife. As shown in Figs. 5 and 6, the knife 70 swings through the space between the core and the guide roll 65 to cut the web, and both the knife and its following brush act together to direct and urge the cut leading end of the web against the rotating new core and into its in-running nip adjacent the anvil roll 30. The action of the brush supplements the directing action of the knife by smoothing and brushing the web against the core in such manner as to force out any air which may be present between the web and the core, thereby causing sufficient momentary adhesion between the web and core to assure carrying of the cutting end of the web into its in-running nip. Then as soon as the web end has been overlapped as the core continues to rotate, the start is completed and the web continue to wind while the knife arms and roll 44 are returned to their retracted positions.

It will thus be seen that the present invention provides highly accurate maintained control over the web during the entire cutting and transferring operation, and that a smooth and even start of the web on each new core is thus assured. In addition, the cutting and transferring mechanism of the invention offers special advantages from the operational standpoint both in minimizing shock and in enabling the operator to make sure that the transferring mechanism is in proper position before the actual cut is made. Thus instead of having a long stroke for the knife, as would be necessary if the knife were carried directly on the arms 61, with the resultant substantial momentum and tendency to shock at the completion of the cut, with the present invention the arms 61 can be moved relatively slowly into position, and the actual knife stroke is short and can therefore be executed quickly at the desired instant with so little force that the knife will be more effective in directing the cut end of the web into its starting position on the new core. All of these features contribute to improved performance and a high quality of uniformity in the wound rolls.

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 which is defined in the appended claims.

What is claimed is:

1. In a continuous winder for web material, apparatus for transferring the advancing web from. a full roll to a new core comprising an elongated guide member extending substantially the full width of the web and having a normally retracted position out of contact with the web, means for rotating said core at substantially the surface speed of the web, means for moving said rotating core into engagement with the advancing web, means for causing said web to engage the side of said core away from said retracted position of said guide member in such manner as to form an in-running nip with said core, means for shifting said guide member from said retracted position into contact with the opposite side of the web from said core at an advanced position located between said core and said full core to cause said web to wrap materially more than of said core and spaced from said core to leave a portion of said web advancing from said core to said guide member across the resulting space therebetween, a knife carried by said guide member for movement with respect thereto through said space between said guide member and said core in said advancedposition of said guide member, means for causing said movement of said knife generally in the direction of rotation of said core to sever said web in said space, and yieldable means mounted for movement with said knife in following relation therewith into temporary yieldable pressure engagement with said coreto smooth the resulting cut leading end of the web against said core and thereby to direct said web end into said nip for initiating winding on said core- 2. In a continuous winder for web material, apparatus for transferring the advancing, web from a full roll to a new core comprising an elongated guide member extending substantially the full width of the web and having a normally retracted position out of contact with the web, means for rotating said core at substantially the surface speed of the web, means for moving said rotating core into engagement with the advancing web, means for shifting said guide member from said retracted position into contact with the opposite side of the web from said core at an advanced position located between said core and said full roll to cause substantial enveloping of said core by the web and spaced from said core to leave a portion of said web advancing from said core to said guide member across the resulting space therebetween, a knife carried by said guide member for move ment with respect thereto through said space between said guide member and said core in said advanced position of said guide member, a brush mounted for similar movement with and behind said knife in brushing engagement with said core, and means for causing said movement of said knife and brush generally in the direction of rotation of the adjacent surface of said core to sever said web in said space and to brush the resulting cut leading end of the Web onto said rotating core for initiating Winding thereon.

3. In a continuous winder for web material, apparatus for transferring the advancing web from a full roll to a new core comprising an elongated guide member ex tending substantially the full width of the web and having a normally retracted position out of contact with the web, means for rotating said core at substantially the surface speed of the web, means for moving said rotating core into engagement with the advancing web, means for causing said web to engage the side of said core away from said retracted position of said guide memher in such manner as to form an in-running nip with said core, means for shifting said guide member from said retracted position into contact with the opposite side of the web from said core at an advanced position located between said core and said full core to cause said web to envelop materially more than of said core and spaced from said core to leave a portion of said web advancing from said core to said guide member across the resulting space therebetween, a knife carried by said guide member for movement with respect thereto through said space between said guide member and said core in said advanced position of said guide member, a brush mounted for similar movement with and behind said knife in brushing engagement with said core, and means for causing movement of said knife and brush generally in the direction of rotation of the adjacent surface of said core to sever said web in said space and to brush the resulting cut leading end of the web onto said rotating core for initiating Winding thereon.

References Cited in the file of this patent UNITED STATES PATENTS 1,976,641 Vernon et a1. Oct. 9, 1934 2,129,618 Horton Sept. 6, 1938 2,200,000 Johnstone May 7, 1940 2,357,976 Roesen Sept. 12, 1944 2,361,264 Christman Oct. 24, 1944 2,361,265 Christman Oct. 24, 1944 2,512,900 Kwitek June 27, 1950 2,586,833 Kohler et a1 Feb. 26, 1952