CROSS-CUTTING DEVICE FOR CORRUGATED CARDBOARD Russian patent published in 2005 - IPC

FIELD: shearing equipment.

SUBSTANCE: device comprises frame, drive, drum, cutting mechanism with movable blade, fixing mechanism for initial blade position fixation relative drum and accumulation means. Device is provided with blocking mechanism, which secures position of movable blade drive shaft, discrete angular drive of movable blade and changes corrugated cardboard blank lengths. The blocking device is made as screw pair. Screw pair nut is pivotally connected to the frame, screw thereof is pivotally linked with double-armed lever having pivot pin aligned with axis of drum rotation. The second arm of the lever is kinematically linked with T-shaped connecting-rod of cutting mechanism drive by control-rod. One end of connecting-rod is connected to crankshaft on drum pivot, another end thereof is mounted on control-rod attached to swinging unit of three-armed lever of discrete angular drive mechanism of movable blade arranged to perform angular swinging about pivot of mutually connected brake drum and drive pinion. Drive pinion is brought into engagement with driven pinion on cutting mechanism drive shaft end. Pair of mutually spring-loaded brake blocks is installed in brake drum kinematically connected through control-rods with ends of oppositely directed arms of three-armed lever. Blocking mechanism for cutting mechanism drive shaft blockage is mounted on another end of above shaft. The blocking mechanism is made as brake drum installed on frame. Pair of mutually spring-loaded brake blocks is arranged into the drum and kinematically linked with double-armed lever by control-rods. The double-armed lever is coaxial with geometrical axis of cutting mechanism drive shaft including lever of mechanism for fixing movable blade in its initial position. The lever is linked with double-armed lever by control-rod. Free end of double-armed rod has roller periodically cooperating with frame rest. Pivot of double-armed lever of fixing mechanism is arranged on bracket of hollow blade holder shaft. Blade holder is installed on hollow shaft with the use of threaded pins. Blade is removably installed in blade holder groove. The blade is made as conventional replaceable bar for cross-cutting corrugated cardboard. Hollow blade holder shaft is coaxially arranged on cutting mechanism drive and may perform limited rotation. Hollow blade holder shaft is connected with cutting mechanism by a plurality of resilient members.

EFFECT: increased output, operational reliability, cutting quality and blank length accuracy.

1 dwg