Multiformat box forming machine

Multiformat box forming machine comprising:

• a storage unit (1) for storing die-cut cardboard sheets (2),
• a loader (3) for unit-by-unit dispensing of the die-cut sheets (2),
• guiding and positioning means (4) for the die-cut sheet (2),
• means (5) for supplying an adhesive substance on the die-cut cardboard sheet (2),
• a shaping unit (6) comprising at least a vertically displaceable inner mould and an exterior matrix,
• and means (9) for discharging the formed box (10),
• wherein the mould and the matrix of the shaping unit (6) are divided into four segments (7a, 7b, 7c, 7d) and (8a, 8b, 8c, 8d), respectively, which allow horizontal displacement and positioning thereof at the points which coincide with the lower corners of the box (10), it having been provided that each one of the units of mould-matrix segments (7a, 8a), (7b, 8b) (7c, 8c)and (7d, 8d) move solidly joined together so as to maintain the clearances between mould and matrix;
• the shaping unit (6) further comprising actuation means (25) for the vertical and alternate displacement of the four segments (7a, 7b, 7c, 7d) which shape up the inner mould,
• wherein the four segments (7a, 7b, 7c, 7d) which shape the inner mould are connected to the actuation means (25) through four articulated arms (27) with vertical axes of rotation, connected at the outer end to the upper ends of the guided rod (24) of the mould segments (7a, 7b, 7c, 7d), and at the inner end on two slides (28) which slide along a transversal rail (29) connected to the actuation means (25), in order to allow the horizontal displacement of the four mould segments (7a, 7b, 7c, 7d) and the positioning thereof on the lower corners of the box (10).