초록 ▼

Multiformat box forming machine which comprises, at least, a storage unit (1) for die-cut cardboard sheets (2), a loader (3) for unit-by-unit dispensing of the die-cut sheets (2), means (4) for guiding and positioning the die-cut sheet (2), means (5) for supplying an adhesive substance on the die-cu

Multiformat box forming machine which comprises, at least, a storage unit (1) for die-cut cardboard sheets (2), a loader (3) for unit-by-unit dispensing of the die-cut sheets (2), means (4) for guiding and positioning the die-cut sheet (2), means (5) for supplying an adhesive substance on the die-cut cardboard sheet (2), a shaping unit (6) which comprises at least a vertically displaceable inner mould and an exterior matrix, and means (9) for discharging the formed box (10). The mould and the matrix of the shaping unit (6) are divided into four segments, 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 move solidly joined together.

대표청구항 ▼

1. 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 cardb

1. 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). 2. Multiformat box forming machine, according to claim 1, wherein each one of the matrix segments (8a, 8b, 8c, 8d) comprises a lateral articulated blade (12) which comprises actuation means (14) for folding the inner flaps (13) of the box (10). 3. Multiformat box forming machine, according to claim 2, wherein the actuation means (14) of the lateral articulated blade (12) are pneumatic, hydraulic or electric. 4. Multiformat box forming machine, according to claim 1, wherein each one of the matrix segments (8a, 8b, 8c, 8d) comprises a lateral folding platform (32) which comprises a curved plate (31) and a press (16), with their respective actuation means (17, 33), for the folding and pressing of the lateral flaps (15) of the box (10), in order to strengthen their adhesion to the inner flaps (13). 5. Multiformat box forming machine, according to claim 4, wherein the actuation means (17, 33) of the lateral folding platform (32) and the press (16) are pneumatic, hydraulic or electric. 6. Multiformat box forming machine, according to claim 1, wherein the shaping unit (6) comprises a format changing mechanism which comprises four C-shaped arms (18) bearing on their lower ends the matrix segments (8a, 8b, 8c, 8d), whose arms (18) are mounted, from their upper ends, on a first set of rails (19) assisted by a pair of motorized screws (20) for the transversal displacement thereof, whose first set of rails (19) is mounted on a second set of rails (21), also assisted by another pair of motorized screws (22), for the longitudinal displacement thereof. 7. Multiformat box forming machine, according to claim 6, wherein the motorized screws (20, 22) comprise a threaded shaft (23) with two equal spiral portions in each direction. 8. Multiformat box forming machine, according to claim 1, wherein each one of the inner mould segments (7a, 7b, 7c, 7d) comprises at its lower end a suction pad (30) for fastening the box (10). 9. Multiformat box forming machine, according to claim 1, wherein the actuation means (25) of the four segments (7a, 7b, 7c, 7d)which shape the inner mould comprise an electric motor (25) and a rotating slider crank mechanism (26) which transforms the rotational movement into an alternate linear movement. 10. Multiformat box forming machine, according to claim 1, wherein the means for supplying the adhesive substance comprise at least two dispensing glueguns, (5) disposed on the guiding means (4), before the inlet to the shaping unit (6), which deposit a strand of adhesive substance on the lateral flaps (15) of the die-cut cardboard sheet (2).