Method and an apparatus for automatic change of the reel of extensible film in wrapping machines for the packaging of palletized loads

摘要

A film changer apparatus changes the reel of extensible film in wrapping machines for packaging palletized loads. A supporting structure has an assembly for carrying the reel of the wrapping film and retains the free end of the film of a reel. Supporting structure is vertically movable between a wrapping position and a lowered position for changing a reel. A retainer provides temporary support of the free end of the film and is movable between two end positions. The automatic changer includes a release and expulsion device for the reel and for positioning the carriage for placing the reel into proper position. The changer also includes devices to position the spindles for carrying the reels to pick up the new reel from the carriage and transfer the free end of the film to be retained. The changer moves the support structure back to a wrapping position and moves the carriage to bring a new reel from the reel changer.