ASSEMBLY (OR FORMING) ASSEMBLY FOR MOUNTING ON A HORIZONTAL AUTOMATIC ASSEMBLY MACHINE FOR ADHESIVE-FREE CORRUGATED CARDBOARD BOXES AND METHOD OF ASSEMBLING THE BOXES

Abstract

An assembly (or former) assembly for mounting on a horizontal automatic assembly machine for corrugated cardboard boxes, comprising a plurality of locks and a plurality of interlocks, for adhesive-free assembly. In preferred embodiments, the box has 8 locks and 8 interlocks. In a first embodiment, the assembly (or former) assembly is used for assembling boxes with a rectangular bottom and beveled corners, and in a second embodiment, it is used for assembling boxes with a rectangular bottom. The invention further includes methods for the automatic assembly of cardboard boxes by means of the locks and interlocks using the assembly (or former) assembly of each of the two embodiments.

Description

ASSEMBLY (OR FORMING) ASSEMBLY FOR MOUNTING ON AN AUTOMATIC HORIZONTAL ASSEMBLY MACHINE FOR ADHESIVE-FREE CORRUGATED CARDBOARD BOXES AND BOX ASSEMBLY METHOD FIELD OF INVENTION The present invention relates to an assembly (or former) unit for mounting on a machine for the automatic horizontal assembly of corrugated cardboard boxes. These boxes feature a special interlocking and locking design that allows for rapid assembly without the use of glues or adhesives. The invention also includes a method for assembling the boxes using the assembly (or former) unit. BACKGROUND OF THE STATE OF THE ART The following documents are known in the prior art: US patent 6179204B1 discloses a tray assembled by automated equipment from a die-cut blank. Tabs at opposite ends of the side pieces are rolled into coiled ends. A serrated edge on a distal edge of each coiled end is positioned in a cut and flattened area to interlock the distal edge with the blank and form a tray with interlocking walls. The serrated edge does not penetrate the die-cut blank, thus providing a leak-proof, interlocking tray. Perforations define several fold lines to facilitate the use of automated equipment to form the tray. Non-stick paper is placed in the center of the tray, and cake batter is placed on top of the non-stick paper. The batter can be baked to form a cake while still in the tray. US patent 2832270 discloses a device for converting flat-cut and slotted box blanks, in particular lined blanks having side panels of a predetermined height, into the form of a hollow box, the device comprising a reciprocating plunger and a die through which said plunger can be moved, said plunger comprising a lower surface that engages the blank and two opposing side surfaces substantially vertical with respect to said lower surface against which the side panels of the blank fold during the passage of the plunger through the die, the plunger further comprising a projecting and retractable finger, said finger being mounted on said plunger to move in a plane substantially vertical with respect to said lower surface and substantially normal with respect to a side surface of the plunger.said finger pointing towards said bottom and being at a distance of 6° from the bottom more than said height, except for the finger tip which is at a distance less than said height to clear, in the projected position, the side panel structure of the case and to engage with the outer surface of the side panel structure adjacent to its upper edge when being retracted, said plunger including a fixed element adjacent to said finger, between said finger and the nearest corner of the plunger, said fixed element having a blank portion of side panel support surface, said finger tip being movable beyond said element to a position below said portion of surface when retracted; and means controlled by the stroke of the plunger for moving said finger. US Patent No. 3376797A describes a device for erecting cardboard boxes from flat blanks, said boxes comprising a bottom panel, pairs of oppositely arranged side wall panels connected to the margins of said bottom panel by slotted lines, the side wall panels of one of said pairs having slots adjacent to their respective opposite end portions, and the panels of the other of said pairs having flaps adapted to fold around said opposite ends of said first-mentioned side wall panels and be received through said slots to interlock the corner structure of the box, said device comprising, in combination, a matrix structure and a mandrel structure.Including said mandrel structure a plate portion generally rectangular in plan and having a lower surface adapted to engage with the bottom panel of a cardboard blank within the groove lines defining said panel, means mounting said mandrel structure for reciprocating motion through said die structure, said die structure comprising guide blocks having surfaces configured to fold said opposing pairs of said wall panels into positions at substantially right angles to said bottom panel as the blank passes through the die structure,and certain of said guide blocks adjacent to the corners of the blank having surfaces configured to fold said tabs around the outer surfaces of said slitted wall panel; and means for fitting end portions of said tabs through said respective slots as one of the final operations in assembling the carton box, said last-mentioned means comprising a pair of arms having their proximal ends pivotally secured to a portion of said mandrel structure, one on each side thereof,a tab-closing member secured to the distal end of each of said arms and having prongs extending in opposite directions thereof to press against areas of the slotted panels into said slots to simultaneously open said slots for the reception of said tabs and to overlap the incoming terminals of said tabs as they enter the slots, and finally engage said terminal portions through the slots to interlock the corner structure of the box; and cooperating means in said arms and in said die structure for moving said tab-closing member into the box to achieve said quick-closing action. US Patent No. 2919633 (A) discloses a device for folding and locking the corners of a folding box comprising a front wall, a back wall, and opposite end walls with locking flaps to fold and partially insert into curved grooves in the front and back walls, the grooves forming tabs in the walls, said locking flaps including a locking projection extending beyond the limits of said tab, projection to be forced from a position overlapping the respective wall panel to a position underlying the complete box, the device comprising a plunger having a substantially rectangular lower area, vertical end walls, and vertical front and back walls, said front and back walls being provided with knob-shaped projections in a position to rest against a portion adjacent to a groove of a blank erected around said plunger.The piston further having recesses extending within the piston body between the knob-shaped projections and the piston corners, the recesses being open at the bottom; a die through which the piston can be moved, the die having side portions extending substantially parallel to the front and rough walls of the piston and end portions substantially parallel to the end walls of the piston, considering the piston and die in plan view, each of the side portions comprising a side rail having throat elements thereon defining a die throat through which the piston passes, the throat elements being recessed opposite the knob-shaped projections on the piston to allow clearance of the projections with respect to the die during passage of the piston through the die.The projecting and retractable finger elements on said side rails in line with the recesses in the plunger, said finger elements being positioned to rest against the locking projections of the blank when the plunger is in its deepest entry position in the die; spring means for retracting said finger elements to a position outside the rectangular contour of the plunger bottom; a depressible actuator mounted on each of said rails for projecting the respective finger elements to a position within the rectangular contour of the plunger bottom within the recesses when pressed by the actuator; and means for mounting the side rails so as to bring them closer together and further apart from each other to allow temporary widening of the die throat; and an arm on said plunger for engaging and pressing said actuators near the end of the plunger's downward stroke to force the locking projections into said underlying position.said arms having a sufficiently large reach to strike said actuators in the position where the die throat is narrow as well as in the position where the die throat is temporarily widened. US2012208686 (A1) describes a cardboard box assembly apparatus that is a device for folding four panels that constitute a lid section of a cardboard box, forming an overlapping lid where each of the four panels overlaps the adjacent ones. The cardboard box assembly apparatus is provided with release members, locking members, and moving devices. The ejection members eject the respective first portions of the four panels. The locking members lock the respective second portions of the four panels, preventing the second portions from moving in ejection directions. The ejection directions refer to the ejection directions of the four panels. The moving devices move the locking members in a direction that includes at least one vertical component. Document ES2012935 (A6) describes a mechanism comprising a general frame 1 on which are positioned: A) the automatic mechanism for supplying stamped cardboard pieces CT, which comprises receiving and stacking devices, individual gripping devices, displacement devices, positioning and centering devices on the assembly platform 9; B) the automatic mechanism for supplying corner pieces ac, which comprises guiding, individual displacement, gripping and positioning devices 11; C) the automatic mechanism for forming cardboard boxes CC, which comprises devices for clamping, unfolding the four corner tabs, lifting the four walls of the box and forming the corner columns 16; D) the automatic mechanism for extracting cardboard boxes PT, which comprises pushing and translating devices, stacking and evacuating finished products. Document ES1059503 (U) discloses a device for folding corners on cardboard boxes, comprising a drive element, such as a pneumatic cylinder, which rotates a swing arm provided with a terminal element for folding parts of cardboard boxes, such as flaps of reinforcing columns; the swing arm having the simultaneous combination of rotary and axial movement by means of the rotation of a vertical cylindrical shaft attached below to one end of the swing arm, such that a central portion of that cylindrical shaft engages in the recess of a main support, said pneumatic cylinder being coupled to an elongated support, of which the main support is integral;characterized in that the elongated support (16) that supports the device assembly is detachably and adjustablely coupled to a side piece (18) integral with the assembly of a box forming machine, while the tilting arm is detachable and is composed of at least two pieces that are also detachable and adjustable with relative movement between them; all in order to be able to adjust the device adapting it to the geometry and size of the drawer and reinforcing columns to be formed.; Document ES2839552 (A2) discloses a machine and method for forming cardboard boxes from die-cut flat plates, and the cardboard box.The machine (100) comprises a male (60) in the shape of an inverted truncated pyramid, movable in the linear Z direction towards a mold (50) with forming stops (56), movable between the respective retracted and stop positions to evacuate the boxes (B) from the mold (50) through an outlet (55) opposite a plate inlet (54), the forming stops (56) having concave curved surfaces (S2), complementary to convex curved surfaces (62a') of inverted conical shape located in four corner areas of the male (60); a conveyor with a rotary encoder (13) coupled to a rotary motor (12) configured together to move in a controlled manner a pusher member (16) of the plate (P) along linear guides (40); and pressurizable glue injectors (45) configured to deposit glue (CC) onto the plate (P) during its transport. US2860549 (A) describes a packaging machine that can form a blank box into a finished box; said blank box comprising a rectangular base portion and side and end wall portions foldably secured to said base portion, operable support means for supporting a supply of blank boxes, a ram assembly mounted adjacent to said support means for movement between opposite limit positions, operable drive means for actuating said ram assembly between said opposite limit positions, meaning to define a die opening positioned in axial alignment with said ram assembly in which said ram assembly projects during movement to one of said limit positions,an operable blank shuttle for transferring a blank from said support means to a position superimposed on said die opening with the rectangular base portion of the blank coextensive with the die opening, and a plurality of forming edges on said blank shuttle and adjacent to said die opening operable during the movement of said ram assembly to said limit position engages the side and end walls of the preformed box and bends it upwards with respect to the base portion of the preformed box. SUMMARY OF THE INVENTION The present invention consists of a set of elements attached to a machine for the automatic assembly of corrugated cardboard boxes in two formats: a) box with a rectangular bottom with beveled corners and b) a box with a rectangular bottom (i.e., without beveled corners), wherein both embodiments of boxes have a plurality of locks and interlocks and, as a preferred embodiment, a special design of 8 locks and 8 interlocks that allows for rapid assembly without the use of glues or adhesives. The assembly (or forming) unit of the present invention can be mounted on horizontal assembly machines. BRIEF DESCRIPTION OF FIGURES Figure 1 shows the exploded view of the assembly (or former) of the lock drive assembly for the horizontal assembly (or former) for the box with a rectangular bottom with beveled corners. Figure 2A shows the action of the mandrel on the corrugated cardboard sheet, before entering the forming machine, of the horizontal assembly assembly (or former) for the box with a rectangular bottom with beveled corners. Figure 2B shows the action of the mandrel on the corrugated cardboard sheet, entering the former of the machine, of the horizontal assembly assembly (or former) for the box with a rectangular bottom with beveled corners. Figure 2C shows the corrugated cardboard sheet inside the machine's former and the mandrel being withdrawn, in the horizontal assembly (or former) unit for the rectangular bottom box with beveled corners. Figure 2D shows the corrugated cardboard sheet inside the machine's former, with the turners activated, of the horizontal assembly assembly (or former) for the box with a rectangular bottom and beveled corners. Figures 2E and 2E-1 - 2E-6 show the assembly sequence of the box with a rectangular bottom with beveled corners, in the horizontal assembly assembly (or forming) unit. Figure 3 shows the exploded view of the assembly (or former) unit for the horizontal assembly (or former) unit for the box with a rectangular bottom. Figure 4A shows the action of the mandrel on the corrugated cardboard sheet, before entering the machine's former, of the horizontal assembly assembly (or former) for the box with a rectangular bottom. Figure 4B shows the action of the mandrel on the corrugated cardboard sheet, entering the machine's former, of the horizontal assembly assembly (or former) for the box with a rectangular bottom. Figure 4C shows the corrugated cardboard sheet inside the machine's former, the tilting plates beginning to act and the mandrel withdrawing, in the horizontal assembly (or former) unit for the rectangular bottom box. Figure 4D shows the corrugated cardboard sheet inside the machine's former, with the tilting plates activated, in the horizontal assembly (or former) unit for the rectangular bottom box. Figure 4E shows the assembly sequence of the P-84 / 1 format box, using the horizontal assembly assembly (or former) in the horizontal assembly assembly (or former) for the box with a rectangular bottom. The difference between devices for assembling boxes with a rectangular bottom and beveled corners and boxes with a rectangular bottom (i.e., without beveled corners) lies in: -The geometry and turning angle of the turners: for boxes with a rectangular bottom with beveled corners the turners turn 90°, and for boxes with a rectangular bottom the turners turn 180°. - The presence of deflectors: due to the geometry and folding shape of the box with a rectangular bottom with beveled corners, the use of deflectors that generate a pre-fold is necessary; in the box with a rectangular bottom, this is not necessary. DETAILED DESCRIPTION OF THE INVENTION ASSEMBLED RECTANGULAR BOTTOM BOX WITH BEVELED CORNERS WITH 8 LOCKS AND INTERLOCKS - HORIZONTAL ASSEMBLY. In a preferred embodiment, the assembly (or forming) unit of the present invention is described by way of example for assembling boxes with 8 latches and 8 interlocking joints. However, its structure is suitable for assembling boxes with a rectangular bottom and beveled corners that have different numbers of latches and interlocking joints, since only the number of elements that make up the assembly (or forming) unit will vary. Figure 1 shows in detail the assembly (or former) of the horizontal assembly assembly (or former) for the box with a rectangular bottom with beveled corners with 8 locks and insets, of the first embodiment of the present invention. These parts are known as the machine former. The dotted lines show the parts existing in known machines, and the solid lines show all the specially designed parts that make up the assembly (or former) unit of the first embodiment of the present invention, in an example designed for assembling boxes with 8 latches and 8 interlocking parts: Deflectors 1. Qty: 2 Front Cylinder Supports 2. Qty: 4 Actuator Cylinders 3. Qty: 8 Finger position adjustment plates 4. Qty: 8 Anchor forks 5. Qty: Interlocking fingers 6. Qty: 8 Side cylinder supports 7. Qty: 4 Forming plates 8. Qty: 4 Turners 9. Qty: 2 Mandrel 10. Qty: 1 Figure 2A shows the action of the mandrel on the corrugated cardboard sheet, before it enters the machine's former. Figure 2B shows the action of the mandrel on the corrugated cardboard sheet as it enters the machine's former. Figure 2C shows the corrugated cardboard sheet inside the machine former and the mandrel being withdrawn. Figure 2D shows the corrugated cardboard sheet inside the machine's former, with the turners engaged. The detail shows the corner of the box (dotted line) and the interlocking fingers. Figure 2E shows the assembly sequence for a rectangular box with beveled corners and eight interlocking mechanisms, starting with a flat sheet of corrugated cardboard in Figure 2E-1 and culminating in the formed box in Figure 2E-6. Sequences 2E-1 through 2E-5 are assembled using conventional methods; in position 2E-6, the interlocking fingers engage. The assembly (or forming) unit of the present invention was designed to be mounted on various existing box-making machines of proprietary design. These known machines have the capability to assemble cardboard boxes and glue them with hot-melt adhesive. The assembly (or forming) unit of the present invention adds the capability for these machines to assemble cardboard boxes without using adhesive. The assembly (or forming) unit consists of various custom-designed mechanical parts and commercially available pneumatic cylinders. The combination of all these parts enables the transverse movement of components called the machine's locking fingers, which perform the individual locking of each case lock. Each locking mechanism on the box corresponds to a pneumatic cylinder, which, when activated, transmits movement to each of the machine's locking fingers that insert the locking mechanisms into the corresponding die. When the locking fingers retract (via pneumatic retraction), each locking mechanism is engaged in its position, securing the box assembly. The numbered and described parts in Figure 1 form part of the assembly (or forming) set of the special assembly kit that forms this embodiment of the assembly (or forming) set of the present invention. Deflectors 1 perform the initial folding of the box when mandrel 10 pushes the corrugated cardboard sheet onto the former. Once the box is folded inside the former formed by the forming plates 8, the tilters 9 are activated, folding the top part of the box (roof). After it is completely folded, the actuator cylinders 3 (ADNGF 40-40) activate the locking fingers 6, locking the box in position. Using the elements of the present invention, the assembly of the box is carried out by the action of mechanical movements without the use of any type of adhesive. The assembly method sequence for the second embodiment is as follows: 1.- The box is formed by inserting it into the former using mandrel 10 of Figure 1; 2.- The 9 turners are activated by folding the top part, that is, the roof of the box; 3.- The 6 side and front locking fingers (total 8 push fingers) are actuated by means of pneumatic cylinders 3, this action is performed with the 9 turners in the folded position. ASSEMBLY OF RECTANGULAR BOTTOM BOX WITH 8 LOCKS AND JOINTS - ASSEMBLY HORIZONTAL. In a preferred embodiment, the assembly (or forming) unit of the present invention is described by way of example for assembling boxes with 8 latches and 8 interlocking slots. However, its structure is suitable for assembling boxes with a rectangular bottom that have other numbers of latches and interlocking slots, since only the number of elements that make up the assembly (or forming) unit will vary. Figure 3 shows in detail the assembly (or former) of the horizontal assembly assembly (or former) for the box with a rectangular bottom (i.e., without beveled corners), designed for the example of assembling boxes with 8 locks and 8 interlocks, of the present invention. The dotted lines show the parts existing in known machines, and the solid lines show all the specially designed parts that make up the assembly (or forming) unit of the second embodiment of the present invention. The assembly of all these parts is known as the machine former. The example for assembling boxes with 8 latches and 8 interlocking pieces comprises: Front cylinder supports 102. Qty: 4 Actuator Cylinders 103. Qty: 8 Finger position adjustment plates 104. Qty: 8 Anchor forks 105. Qty: 8 Locking fingers 106. Qty: 8 Side cylinder supports 107. Qty: 4 Forming plates 108. Qty: 4 Turning plates 109. Qty: 2 Mandrill 110. Qty: 1 Figure 4A shows the action of the mandrel on the corrugated cardboard sheet, before it enters the machine's former. Figure 4B shows the action of the mandrel on the corrugated cardboard sheet as it enters the machine's former. Figure 4C shows the corrugated cardboard sheet inside the machine former, the turning plates beginning to act and the mandrel withdrawing. Figure 4D shows the corrugated cardboard sheet inside the machine's former, with the turners engaged. The detail shows the corner of the box (dotted line) and the interlocking fingers. Figure 4E shows the assembly sequence for the rectangular-bottomed box with 8 latches and interlocking mechanisms, starting as a flat corrugated cardboard sheet in Figure 4E-1, and ending with the shaped box in Figure 4E-6. The sequence 4E-1 to 4E-5 is assembled using conventional systems; in position 4E-6, the interlocking fingers are engaged. The box-forming assembly of the present invention was designed to be mounted on various existing box-forming machines of proprietary design. These known machines have the capability of assembling cardboard boxes and gluing them with hot-melt adhesive. The box-forming assembly of the present invention adds the capability for these machines to assemble cardboard boxes without using adhesive. The assembly (or forming) unit consists of various custom-designed mechanical parts and commercially available pneumatic cylinders. The combination of all these parts enables the transverse movement of components called the machine's locking fingers, which perform the individual locking of each case lock. Each box lock corresponds to a pneumatic cylinder (total quantity: 8), which, when activated, transmits movement to each of the machine's locking fingers that insert the box lock into the corresponding die. When the locking finger is withdrawn (by means of pneumatic retraction), the box lock is engaged in its position, allowing the box assembly to be secured. The numbered and described parts in Figure 3 form part of the special assembly kit that forms this second embodiment of the assembly (or forming) set of the present invention. The mandrel 110 pushes the corrugated cardboard sheet onto the former. Once the box is folded inside the former, held by the plates 108, the tilting plates 109 are activated, folding the side reinforcement of the box. After it is completely folded, the actuator cylinders 103 (ADNGF 40-40) activate the locking fingers 106, locking the box in position. Using the elements of the present invention, the assembly of the box is carried out by the action of mechanical movements without the use of any type of adhesive. The assembly method sequence for the second embodiment is as follows: 1.- The box is formed by inserting it into the former using mandrel 110 of Figure 3 2.- The tilting plates 109 are activated by folding the side reinforcements of the box. 3.- The lateral and front locking fingers 106 (total 8 push fingers) are actuated by means of pneumatic cylinder 103, this action is performed with the tilting plates 109, in folded position.

Claims

1. An assembly (or former) for mounting on a horizontal automatic assembly machine for a corrugated cardboard box with a rectangular bottom and beveled corners, comprising a plurality of locks and a plurality of interlocks, capable of achieving adhesive-free assembly, the assembly (or former) being characterized in that it comprises a former formed by: i) a plurality of deflectors (1); ii) a plurality of front cylinder supports (2); iii) a plurality of actuator cylinders (3); iv) a plurality of finger position adjustment plates (4); v) a plurality of anchoring forks (5); vi) a plurality of interlocking fingers (6); vii) a plurality of side cylinder supports (7); vii) a plurality of forming plates (8); viii) a plurality of tilters (9); and ix) a mandrel (10); where the mandrel (10) is able to push the corrugated cardboard sheet onto the former;The deflectors (1) are capable of performing the initial folding of the box; once the box is folded inside the former, the tilters (9) are capable of folding the top of the box; the actuator cylinders (3) are capable of actuating the locking fingers (6) by means of the pneumatic cylinders (3), and wherein the locking fingers (6) are capable of pushing each of the box latches into their engagement position, thus leaving the box fully assembled.

2. The assembly (or former) unit according to claim 1, wherein the corrugated cardboard box with a rectangular bottom and beveled corners comprises 8 latches and 8 locking mechanisms, the assembly (or former) unit being characterized in that it comprises: i) 2 deflectors (1); ii) 4 front cylinder supports (2); iii) 8 actuator cylinders (3); iv) 8 finger position adjustment plates (4); v) 8 anchor forks (5) ; vi) 8 locking fingers (6) ; vi) 4 side cylinder supports (7) ;vii) 4 forming plates (8) ; viii) 2 tilters (9) ; and ix) 1 mandrel (10) ; 3. An assembly (or former) unit for mounting on a horizontal automatic assembly machine for a corrugated cardboard box with a rectangular bottom, comprising a plurality of locks and a plurality of interlocks, capable of achieving adhesive-free assembly, the assembly (or former) unit characterized in that it comprises a former formed by: i) a plurality of front cylinder supports (102) ; ii) a plurality of actuator cylinders (103) ; iii) a plurality of finger position adjustment plates (104) ; iv) a plurality of anchoring forks (105) ; v) a plurality of interlocking fingers (106) ; vi) a plurality of side cylinder supports (107) ; vii) a plurality of forming plates (108); viii) a plurality of turning plates (109); and ix) 1 mandrel (110); wherein the mandrel (110) is capable of pushing the corrugated cardboard sheet onto the former;Once the box is folded inside the former, contained by the forming plates (108), the tilting plates (109) are capable of folding a lateral reinforcement of the box; after the box is completely folded, the actuator cylinders (103) are capable of actuating the interlocking fingers (106), leaving the box fully assembled.

4. The assembly (or former) according to claim 3, wherein the corrugated cardboard box with a rectangular bottom comprises 8 latches and 8 interlocking elements, the assembly (or former) characterized in that it comprises: i) 4 front cylinder supports (102); ii) 8 actuator cylinders (103); iii) 8 finger position adjustment plates (104); iv) 8 anchoring forks (105); v) 8 interlocking fingers (106); vi) 4 lateral cylinder supports (107) ; vii) 4 forming plates (108) ; viii) 2 turning plates (109) ; and ix) 1 mandrel (110) ;5. A method for the automatic assembly of a corrugated cardboard box with a rectangular bottom and beveled corners, comprising a plurality of locks and a plurality of interlocks, by means of the assembly (or former) assembly according to claim 1, to obtain an adhesive-free assembly, characterized in that it comprises the following steps: a.- The cardboard sheet of the box is introduced into the former by means of the mandrel (10);b. The tilters (9) are actuated by folding the top of the box. c. The side and front locking fingers (6) are actuated by means of pneumatic cylinders (3) through the tilters (9) in the folded position.

6. The method according to claim 5, characterized in that it is carried out for the assembly of a corrugated cardboard box with a rectangular bottom and beveled corners, comprising 8 latches and 8 locking mechanisms.

7. A method for the automatic assembly of a corrugated cardboard box with a rectangular bottom, comprising a plurality of latches and a plurality of locking mechanisms, by means of the assembly (or former) unit according to claim 3, capable of obtaining adhesive-free assembly, characterized in that it comprises the following steps: a. The box is inserted into the former by means of the mandrel (110); b. The tilters (109) are actuated, folding some side reinforcements of the box;c.- The side and front interlocking fingers (106) are actuated by means of pneumatic cylinders (103), this action being performed with the tilting plates (109) in the folded position.

8. The method according to claim 7, characterized in that it is carried out for the assembly of a corrugated cardboard box with a rectangular bottom comprising 8 latches and 8 interlocking mechanisms.

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