GB841642A - Continuous winding apparatus for web material - Google Patents

Abstract

841,642. Winding webs. BLACK-CLAWSON CO. July 5, 1957 [July 5, 1956], No. 21392/57. Class 100(1) Continuous winding apparatus for web material, comprises a reel for simultaneously supporting a winding roll and a new core, an indexing drive for the reel to advance the new core to roll starting position, the indexing drive being stopped when the new core is indexed in the starting position, an auxiliary drive for driving the new core in the starting position at a predetermined rotational speed, means operable only after indexing the new core for effecting cutting of the web and transfer of the cut leading end thereof to the new core, and a main drive for selectively driving the winding roll and new core, the main drive being disconnected from the roll on cutting and transfer of the web and being accelerated to the predetermined rotational speed, whereupon the auxiliary drive is disconnected from the new core and the main drive is engaged therewith. As shown, a pair of arms 22, 23, Fig. 2, on a shaft 24 is driven by a motor 25 so as to bring cores 32 successively into winding position. The cores 32 are mounted on spindles 30 and 31 driven through friction clutches 40, 41 supported by an arm 42. The clutches 40, 41 are connected through chain drives 43 with a sleeve 44 on the shaft 24, the sleeve 44 being driven through a belt drive 45 at a decreasing speed by a motor 46. A stand 50 carries idler pulleys 52, 54 and a driving pulley 53; a belt 55, Figs. 1 & 3, passing around these pulleys serves as an auxiliary drive to accelerate a new core 32 to correct speed for commencing winding thereon. The belt 55 can be brought selectively into engagement with one of two pulleys 60, 61, Fig. 2. The belt 55 is tensioned by a pulley 62, Fig. 3, carried by arms, not shown, which can be rocked by actuation of a piston rod in an air cylinder 66. A knife blade 70, Fig. 3, is carried by arms 71 secured to a shaft 73 carried by arms 74 and 75 secured to a tube 77. The tube 77 is rocked through an arm, not shown, actuated by a cylinder 82. The cutting movement of the knife blade 70 is effected by a sprocket, not shown, on a shaft 80. The sprocket carries an arm 88 actuated by an air cylinder 89. A pressure roller 90 presses the leading end of the web, formed after cutting by the blade 70, against the empty core 32 to initiate winding. The roller 90 is carried by arms 91 and 92 pivoted on the shaft 80 for actuation by air cylinders 95 towards and away from the core 32. The air cylinders 66, 82 and 89 are controlled by solenoid actuated valves SV1, SV2, SV3 (Fig. 13, not shown) respectively, while the cylinders 95, Fig. 3, are controlled through a manually actuated valve 99 (Fig. 13, not shown). The clutches 40, 41, Fig. 2, are actuated by solenoid-operated valves SV4, SV5 (Fig. 13, not shown). Switches PSA, PSB, Fig. 14, are opened when pressure is applied to engage the associated clutch. In operation, the arms 22, 23, Figs. 1 and 2 occupy a position such that the roll 33 being wound contacts the pressure roller 90. One of the clutches 40/41 is engaged, therefore a relay CLAR, Fig. 14, in the case of clutch 40, will be energized and held in by a switch LS5 and normally closed push button 120; also switch PSA will be open. Relay CLPR is therefore inoperative. The motor 46 is controlled to rotate at constantly decreasing speed by a known control circuit 125. The motor 25 controlling the operation of the arms 22, 23 is operated selectively by relays WF and WR to produce forward and reverse rotation of these arms. When the roll 33 is complete a switch 126 is closed manually, thus energizing a relay SBR, thereby energizing relay WF to cause the arms 22, 23 to rotate clockwise until switches LSB and LS1 are tripped by cams, not shown, on the shaft 25, Fig. 1. The empty core is now in engagement with the pressure roll 90, while the belt 55 is tensioned by the pulley 62, Fig. 3, to effect driving of pulley 61, Fig. 2, to accelerate the core 32 up to web speed. The solenoid valve SV2, Fig. 14, is then actuated through closed contacts 135 of relay SBR. The knife arms 74, 75 move to operative position, whereupon switch 140 is actuated manually to energize solenoidvalve SV3, thereby causing actuation of the knife blade 70. The leading end of the oncoming web is guided around the core 32. A cam, not shown, on the knife operating arm 88 opens a switch LS5 to de-energize relay CLAR causing clutch 40 to disengage. The relay CLPR is then energized through switch PSA which is closed upon disengagement of clutch 40, a relay SMR is energized by a relay 145 operated upon synchronization of the speeds of motor 46 and the core 32. The contacts 151 of relay SMR energize relay CLAR while switch LSB closed by a cam, not shown, on the shaft 25 energizes solenoid-valve SV5 to engage clutch 41. Switch PSB is then closed to de-energize relay CLPR which restores the control circuit 125 to normal setting. The motor 46 then drives the new core 32 through the spindle 31 and the relay SBR is deenergized to stop belt 55. The arms 74, 75 are thereupon returned to inoperative position and the switch LS4 is opened by a cam on the tube 77. Winding continues until the increase in roll diameter causes arms 91, 92 to rotate thereby closing switch LS2 to energize relay WF which causes forward rotation of the arms 22, 23, to commence another cycle of operations by transferring web winding on to a new core.