GB1032134A - Single drum web winding machine - Google Patents

Abstract

1,032,134. Winding webs. FRANK W. EGAN & CO. Aug. 17, 1964 [March 27, 1964], No. 33462/64. Heading B6B. In a single drum web winding machine, Fig. 1, a web 82 passes over a roller 53, through longitudinal slitters 55, 56, if desired, over a roller 54 and an expander roller 57, and around a winding drum 3 where it is wound on to a web roll 83 urged against the drum 3 by a pair of pneumatically controlled levers 34 acting against the bearings 19 carried by the mandrel 18. The bearings 19 run on a pair of parallel rails 30 mounted on the machine frame. A roller 69, journalled between a pair of levers 70 is pneumatically urged against the web roll by a pair of air cylinders 75 controlled by a cam (80) operated valve 81. The force of the roller 69 against the web roll 83 is increased as the diameter thereof increases, to counteract the increase in weight of the web roll and prevent the mandrel 18 from distorting. A replacement core 84 on the mandrel 18 is placed in the recesses of a pair of quadrants 10 pivoted at the axis of the drum 3 and movable by a crank mechanism 12, 14. In the position shown in Fig. 1, the replacement core is held out of contact with the drum by a pair of pins 21 acting on the bearings 19. Each pin is slidably mounted on its respective quadrant 10, and its radial position with respect to the drum 3 is governed by a stationary cam 26 acting on a cam follower or roller 24 attached to the pin 21. The core is further held in the recesses by a pair of pneumatically (28) operated levers 22 acting on the bearings 19 and pivoted to the quadrants 10. When the web roll 83 is complete, the quadrants 10 are rotated clockwise by a motor 17 via the crank mechanism 14, 12 under the control of a switching disc 119, Fig. 15 (not shown), attached to the shaft 16 of the motor 17. The disc moves clockwise until limit switch LS-1 is operated, whereupon rotation ceases. The quadrants 10 have then rotated sufficiently to transfer the core 84 into contact with the web of the winding drum 3, since the rollers 24 of the pins 21 have moved inwardly of the drum 3 under the control of the cams 26, as illustrated in Fig. 3 (not shown). In this position, the core 84 is pressed into contact with the web on the drum 3 by the levers 22 acting on the mandrel bearings 19 and also by rollers 68 previously lowered into the position shown in Fig. 1. These rollers 68, Figs. 1 and 6 (not shown), are carried by levers 64 pivoted to a frame cross-member 60 and controlled by a pneumatic cylinder 62. They have the effect of urging the central portion of the core and mandrel into contact with the web on the drum 3. The core would have otherwise been distorted if only the levers 22 exerted thrust. The web is immediately severed and attached to the previously adhesived core 84. After an electrically controlled time delay, during which time the completed web roll is removed from the machine by a mechanism described below, the quadrants 10 are further rotated to transfer the core 84 (now with a few turns of web) on to the rails 30. This is again under control of switching disc 119, Fig. 15 (not shown), and limit switch LS2 is operated to stop the motor 17, when the core is in place on the rails 30. Switch LS2 also controls an electromagnet valve to supply air to cylinders 37 and bring levers 34 against the core 84. The levers 22 and roller 68 are raised and the crank mechanism then continues to rotate beyond the dead centre until the switch LS3 is operated and the quadrants 10 are returned to the position shown. In two modifications of the hold-down roller 68 a series of three pairs of rollers may be provided as in Fig. 12 (not shown), or a long roller 86, Fig. 13 (not shown), may be provided with a plurality of portions 87 of larger diameter so as not to interfere with the adhesive 85 on the new core 84. The levers 64 carrying the hold-down roller 68 may be pivoted to the quadrant 10 instead of the main frame, Figs. 9-11 (not shown), in which case the hold-down roller 68 will remain in contact with the winding roll during the whole transfer process. Removal of completed web roll.-Fixed to arms 34, are arms 41, Fig. 1, at the end of which are pivoted arms 43 holding rollers 45, whose purpose is to remove the finished wound web roll 83 away from the winding drum after the web is transferred to the new mandrel. Arms 43 are held in the position shown in Fig. 1 by springs 47 and stop-pins 48. At the discharge end of the winder the finished rolls are-lowered to floor level by holders 49, which are slidably mounted on the frame of the machine and controlled by a pair of fluid cylinders 51. When the web is severed and attached to the new mandrel 84 the arms 34 are rotated towards the discharge end of the machine by the fluid cylinders 37 and rollers 45 contact the mandrel bearings 19 and move the wound roll to the position shown as 83a where the mandrel bearings rest in holders 49 and 50. The rails 83 can then be lowered to floor level by means of the cylinders 51. On return of the arms 34 towards the winder drum 3 the rollers 45 contact mandrel bearings 19, by which time arms 43 pivot clockwise dropping rollers 45 and allowing them to pass under the mandrel bearings. Movement of the arms 34 continues until rollers 32 contact the mandrel bearings and begin to apply pressure to the mandrel against the winding drum.