Abstract: A packaging machine (10) designed and equipped for the compression and packing of blocks of expanded material and in particular expanded polyurethane where the machine comprises: a) an infeed block “A” comprising an infeed unit (11) mounted on wheels, which has a first lower infeed conveyor belt (12) and a second upper infeed conveyor belt (13) which is fitted with a first hydraulic press (14); b) a central block “B” containing a crossways sealing bar (15) operating with a cold sealing system and a powered lower reel holder (16) and a powered upper reel holder (17); c) a rear block “C” comprising a second out feed conveyor which in turn comprises an upper conveyor belt fitted with a central hydraulic press counter opposing a further lower conveyor belt (20), and two side sealing bars (21) employing a cold sealing system.