Automatic core charging and bobbin discharging group in a plastic film winding machine

An automatic core charging and reel discharging group in a plastic film winding machine, positioned partially juxtaposed and partially below a winding reel, comprising:

• a core charging portion having a motorized (66) linear actuator (65) carrying a guide-support (67) which houses a plurality of cores (43) adapted for receiving a plastic film, said guide-support (67) being movable, backwards and forwards, between a position associated with a core charger and a juxtaposed position, axially parallel to a spindle (16, 17) of the winding reel, with said cores (43) being positioned to be inserted on said spindle (16), wherein said linear actuator (65) is vertically liftable upon a variation in an external diameter of said cores (43);
• and
• a bobbin discharging portion (35) having a motorized conveyor belt (77), equipped with at least one extendable portion (78), movable between a position below a spindle (16 or 17) carrying wound bobbins (35) and a discharging portion of said bobbins, said conveyor belt (77) being vertically liftable upon the variation in the external diameter of said cores (35), vertical liftings of said linear actuator (65) and of said conveyor belt (77) being operated by a linear potentiometer (73, 82).