GB2035272A - Web winding machine with core or web roll changing - Google Patents

Abstract

A winding machine for winding strip material (2,2') onto an empty reel sleeve (6) comprises an arcuate cutting table (25,25') moveable concentrically with a carrying roller (4) from a waiting position to an operating position between the strip and the carrying roller. Before cutting occurs a double-sided adhesive label is applied to the strip before and after the cutting line so that each end after cutting has a label adhered thereto. The end of the strip wound on the reel is stuck down on the reel and the other cut end is adhered to a fresh reel sleeve (6). To remove the need for precise control of the position of the adhesive-label issue device (52), each label has a length less than 10 mm, preferably 2 to 5 mm. <IMAGE>

Description

SPECIFICATION Winding machine for the formation of individual reels The invention relates to a winding machine for the formation of individual reels of strip material. In particular it relates to improvements in the machine disclosed in UK Patent Application 24262/78.

The winding machine disclosed therein, by pressing twice an adhesive-label issue device, allows the application of adhesive labels whilst the machine is stopped in such a manner that double-sided adhesive labels are applied before and behind a cutting position wherein the strip is cut, so that the end of the final layer of a full wound reel is stuck down on the reel and the end of the initial layer of a new reel is also adhered to an empty sleeve. Owing to the utilization of a pressure roller, over which the band supporting the adhesive labels is guided and which is driven by the material strip, the adhesive labels are applied by pressure of the adhesive-label issue device.

It was found that it is necessary to transfer the whole length of each adhesive label to the strip ends in order to avoid malfunction. Therefore, a precise length and position control of the adhesive labels is important.

An object of the invention is precise length orientation of the adhesive labels, without additional expenditure on control devices.

According to the invention this object is solved in that the adhesive labels on the supporting hand possess a pitch of less than 10 mm.

Thus, the present invention provides a winding machine for the formation of individual reels from longitudinally cut strips of material, which comprises a carrying roller rotatable about an axle mounted on a frame, and associated with the carrying roller a pair of swing arms supporting one reel sleeve each, relief and pressure devices for the swing arms, a cross-cutting device for cutting transversely the strip, a sickle-shaped table moveable concentrically to the carrying roller from a waiting position outside the path of the strip to an operating position between the strip and the surface of the carrying roller, (a) one or more adhesive-label issue devices arranged on a swivelling shaft orientated parallel to the axis of the carrying roller and controllably swingable against the carrying roller;; (b) the reel sleeve being liftable away from the carrying roller by means of lifting cylinders so as to form a gap equal to the thickness of the table; (c) a cutting slide movable in a slot in the table parallel with the axle of the carrying roller; (d) the table comprising, a suction chamber on the rearward side of the slot considered with respect to the direction of travel of the strip, (e) the table being provided as a pressure table for the empty reel sleeve and being capable of being swivelled in the direction of travel of the strip from a cutting position into the waiting position after restarting of the machine, characterized in that adhesive-labels provided on a supporting band of each label issue device each have a length less than 10 mm.

In a non-obvious manner the invention proposes an adhesive-label band, the adhesive labels of which possess a very small split. If in the pressing of the adhesive-label sticker device a section of label is transferred to the material strip, then the whole section is transferred to the strip, since the pitch is so small i.e. so short. The adhesive label band with this small pitch, in practice can be set relative to the strip in any position desired and can be lifted therefrom, without any risk that a longer section of adhesive label is torn off in an uncontrolled manner.

According to a further development of the invention the pitch of the adhesive labels is 2 to 5 mm.

Thus, one has a quasi-continuous pitch of adhesive labels. According to the invention control of the adhesive labels, e.g. a register control, is not necessary. Rather it is possible to apply an adhesive-label section of the required length by controlling the pressure duration of the adhesive-label issue device.

The length of the adhesive-label section may be determined as a function of the holding power of the adhesive labels, of the values of stiffness of the strip material, and of other known characteristic values.

The use of adhesive labels of small pitch also enables the application of a plurality of separate individual sections of preselected length to the strip so that a variable application of the machine is possible.

One embodiment of the invention will now be described with reference to the attached drawings, wherein Figure lisa schematic view of the winding machine according to the invention in the winding position, and Figure 2 is a corresponding view in the lifted position for crosscutting and reel change.

The winding machine according to the invention comprises a machine frame with shield plates 1 arranged oppositely to one another, between which the shafts and other portions of the winding machine are situated. In the Figures there is illustrated only the winding-on portion of the machine. The unwinding part any transverse stretching rollers, guide rollers as well as the device for longitudinal cutting are not shown. Subsequent to the device for longitudinal cutting, not shown, the longitudinally cut strips 2 from the material band are moved in the direction of the arrow. Strips 2 and 2' adjacent to one another are guided via a guide roller and alternately guided to carrying rollers 4 and 4', against which reels 5 on reel sleeves 6 abut in each case. Each reel sleeve 6 is gripped in the respective holders of a pair of swing arms 7, 7'. This arrangement is usual in winding engineering.The shaft 28 of each carrying roller 4, 4' is driven by driving means, not shown.

Between the shield plates 1 a bridge piece 10 capable of being swung about an axle 9, is associated with each carrying roller 4, 4'. Swivelling of the bridge piece 10 as a whole is possible by means of one or more hydraulic cylinders 11 which are mounted on brackets 11' of the shield plate 1 or of another frame part, and a piston rod 12 picoted on a shoulder 13 of the bridge piece 10. The bridge piece 10 comprises a guide rail 14, upon which, in each case, bearing blocks 15 are arranged in a slidable and lockable manner. A swing arm, pivotable about an axle 16, is supported on each bearing block. Two bearing blocks 15, each with a pair of swing arms 7, belong together; the two swing arms 7 being coupled with each other by a connecting rod 16.On a projection 17 of each bearing block 15 there is pivoted a pneumatic cylinder 18, the piston rod 19 of which is coupled with the associated swing arm 7.

The piston rod 19 comprises a stop collar 20. The pneumatic cylinders 18 render possible in each case individual adjustment of the relief pressure or of the contact pressure, respectively, for the individual reels 5. The hydraulic cylinders 11 allow pivoting of the bridge piece 10 as a whole and, thus, a common lifting movement of all reels 5 from the carrying roller 4. In this lifting movement the bridgepiece 10 is initially swivelled until the stop collars 20 of the piston rods 19 abut the associated pneumatic cylinder, whereupon further swivelling is performed and the reels 5 are lifted from the associated carrying roller 4 so that a gap 21 (cf. Figure 2) is formed.

In gap 21 there is provided a light barrier (beam) 22 which is adjusted in accordance with the desired width of the gap 21. The light barrier 22 acts upon a control stage 23 which controls the control part 24 of the hydraulic cylinder 11 and interrupts the swivelling motion of the bridge piece 10 when the light barrier 22 indicates that the predetermined width of the gap 21 has been reached.

There is associated with each carrying roller 4 a supporting and cutting table 25 which has a sickleshaped cross-section and is provided on supporting arms 26 which with bearing housings are rotatably supported on the axle 28 of the carrying roller 4.

Swivelling of the supporting arms 26 is carried out by a chain drive 31 from a setting shaft 8.

Figure 1 shows the supporting and cutting tables 25 and 25' in the waiting position; Figure 2 shows them in the operating position, to which they are pivoted by means of the setting shaft 8. In the operating position of the supporting and cutting tables 25 and 25', respectively, the reels 5 and/or the sleeves 6 are lifted in accordance with the width of the gap 21 so that the supporting and cutting table 25 and/or 25', respectively, can be swivelled across a corresponding circumferential surface portion of the carrying roller 4, thereby lifting strips 2, 2'. The supporting and cutting table 25 extends across the complete axial length of the carrying roller 4,4' and, thus, across the complete working width of the winding machine.

The supporting and cutting table 25 comprises, according to Figure 2, a suction chamber 32 having suction ports. In addition, a cutting slide 36, on the supporting and cutting table 25, is movable transversely to the moving direction of movement of the strip so that transverse cutting of the strip is possible.

In parallel with the axle 28 there is supported, between the shield plates 1, a swivelling shaft 49, on which adhesive-iabel issue devices 52 are held. By means of a key-guidance the adhesive-label issue devices 52 are slidable and adjustable in the axial direction oftheswivelling shaft 49. Each adhesivelabel issue device 52 comprises a shaft for windingon andthewinding-offthe label supporting band as well as a pressure and guide roller around which the label band is guided. The roller 56 is rotated by movement of the strip and thus serves to drive the adhesive-label issue device 52.

The swivelling shaft 49 may incorporate a plurality of adhesive-label issue devices 52. These may be arranged across the working width of the machine as necessary so that each strip can be equipped with one or more adhesive-label sections of the quantity required. The adhesive labels positioned on the supporting belt possess a longitudinal pitch of less than 10 mm, e.g. a pitch between 2 and 5 mm, so that the adhesive-labels may be detached in small sections of this pitch.

During the winding operation, the structural elements of the roller winding machine are in the position, evident from Figure 1. The supporting and cutting tables 25, 25' are in the waiting position as illustrated. The reels 5 are lifted via the swing arms 7, 7' by means of the pneumatic cylinders 18 in compliance with the increase of the reel diameter as the reel is wound, so that there always exists the desired contact pressure at the carrying roller 4,4' and proper winding is achieved. This control of the winding operation is known. As soon as the desired strip length is wound-on upon the reels 5, the machine is braked. During the deceleration of the strip the swivelling shaft 49 is swivelled by a cylinder unit, not shown, in a counterclockwise direction related to Figure 1, so that the pressure roller 56 is pressed against the still moving strip and against the carrying roller 4.The duration of this swivelling motion is coordinated with the velocity of the strip and the necessary length of double-sided adhesivelabel section. As a function of the duration of this pressing motion an adhesive-label section of appropriate length is transferred to the strip. Due to the small pitch of the double-sided adhesive-lables the adhesive-label issue device can be lifted from the strip in any position (i.e. at anytime). The short adhesive-label section is detached and comes into contact completely with the strip.

The phase of the pressure movement is coordinated with the deceleration of the machine in such a manner that the region of the strip taking up the adhesive-label is before the designated crosscutting line wherein the strip is to be transversely cut and is pressed against the penultimate layer of the reel 5.

The shaft 49 is pressed against the strip a second time so that a further adhesive-label is applied behind (relative to the direction of strip travel) the designated cross-cutting line. This second label is thus at the beginning of the strip for the new reel.

The length of this adhesive-label section can also be set to a desired length by control of the duration of the pressure phase.

After the deceleration or simultaneously with the deceleration, the hydraulic cylinders 11 swivel the bridge piece 10 about the axle 9 in a clockwise direction. Thus, the piston rods 19 of the pneumatic cylinders 18 are moved into the cylinder chamber, till the stop collar 20 abuts the cylinder wall. On further swivelling of the bridge piece 10, the swing arms 7, 7' rest in a form-locking manner upon the pneumatic cylinders 18 and are lifted together with same. In accordance with this lifting motion, a gap 21 forms between the reel 5 and the associated carrying roller 4. As soon as the predetermined width of this gap 21 is reached, the light barrier 22 applies a signal which, via the control stage 23, acts upon the control portion 24 of the hydraulic cylinders 11 and blocks them so that the bridge piece 10 stops in the position, evident from Figure 2,forthe reel change.

Thereafter, crosscutting and change of reels occurs, this is not described in detail. After the insertion of an empty reel sleeve 6 the bridge piece is swivelled back. The drive for the reel sleeve 6 and the machine drive are switched on. The beginning of the material strip is still retained on the supporting and cutting table 25. Upon starting of the machine the supporting and cutting table 25 and 25', respectively, swivel back in accordance with the rotation of the setting shaft 8 in an anticlockwise direction into the waiting position according to Figure 1. Thereby the beginning of the strip which is retained on the suction chambers 32, is carried along together with its adhesive label and reaches safe abutment on the new reel sleeve 6, where the adhesive label retains the beginning of the strip on the periphery of the reel sleeve 6. Thereby perfect starting of the winding-on operation is guaranteed. After swinging back of the swivelling shaft 49, all parts are again in the waiting position, illustrated in Figure 1.

The invention ensures that adhesive-label sections of the necessary length are always applied to the material band at the desired positions. By virtue of the small pitch the adhesive labels can be detached at any position. There is no risk that an adhesivelabel section may stick in an unwanted position on the strip or on the adhesive-label issue device, thereby causing malfunction.

Claims (4)

1. A winding machine for the formation of individual reels from longitudinally cut strips of material, which comprises a carrying roller rotatable about an axle mounted on a frame, and associated with the carrying roller a pair of swing arms supporting one reel sleeve each, relief and pressure devices for the swing arms, a cross-cutting device for cutting transverselythe strip, a sickle-shaped table moveable concentrically to the carrying roller from a waiting position outside the path of the strip to an operating position between the strip and the surface of the carrying roller, (a) one or more adhesive-label issue devices arranged on a swivelling shaft orientated parallel to the axis of the carrying roller and controllably swingable against the carrying roller;; (b) the reel sleeve being liftable away from the carrying roller by means of lifting cylinders so as to form a gap equal to the thickness of the table; (c) a cutting slide movable in a slot in the table parallel with the axle of the carrying roller; (d) the table comprising, a suction chamber on the rearward side of the slot considered with respect to the direction of travel of the strip, (e) the table being provided as a pressure table for the empty reel sleeve and being capable of being swivelled in the direction of travel of the strip from a cutting position into the waiting position after restarting of the machine, characterized in that adhesive-labels provided on a supporting band of each label issue device each have a length less than 10 mm.

2. Winding machine according to claim 1, wherein the length of each adhesive label is 2 to 5 mm.

3. Winding machine substantially as described with reference to the drawings.

4. A supporting band for use in the machine of any preceding claim, having thereon a plurality of double-sized adhesive labels each of a length less than 10 mm.