ES1292904U - Box formation machine from plates (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Machine (100) for the formation of boxes (b) from plates (p), having these boxes (b) a background portion (f) surrounded by four side walls (PL) faced two to two that delimit four corner areas of the box, and some flanges (r) located at the top of the side walls (PL) surrounding the box (b) and that are projected in a cantilever to the outside of the box (b) providing support for a closing sheet; where the machine (100) understands: A mold (50) defined by a cavity (52) with an input mouth (54) of a plate (P), an output mouth (55) of a box (b) formed, confronted and aligned with the input lock, and being the cavity (52) delimited at least partially by some box conforming elements that include a plurality of faces (58, 59) flangers arranged around the cavity (52) and displarable between a retracted position, which allows the Expulsion of a box with these flanges (r) in a cantilever, through the cavity (52), and a top position in which the faces (58, 59) flange conformators obstruct at least partially the perimeter of the cavity (52) to form the flanges (R); A male (15) endowed with a background forming face (65) surrounded by four wall forming faces (62) confronted two to two that delimit four corner forming zones of the machine (100), being the male (15) displable In a linear direction (Z) by a male (10) actuator in opposite senses of introduction and extraction of the cavity (52) of the mold (50), being the background forming face (65) configured to press the background portion (F) of a plate (P) positioned in the entrance mouth (54) introducing it into the cavity (52) during the displacement of introduction of the male (15), which has associated a flange -forming device configured to cooperate in the folding of the flanges (r) with respect to the side walls (PL) to the outside of the boxes (b) and/or press them against the conforming elements of the box (b); The machine (100) is characterized because: The flange -forming device includes at least two first forming members (64a) mutually faced, associated with two opposite wall forming faces (62), exceeding each of said forming members (64a) of a corresponding wall forming face (62) On the outside of the male (15) and being superimposed on the faces (58, 59) flange conformators, when these faces (58, 59) flange conformators are in the top position; and Because the machine (100) comprises a plurality of second forming members (64b), of action in corners arranged around the male (15), each arranged in a corner forming area of the machine (100), being the second forming members forming members (64b) Movables, by some actuators (66) of second forming members (64b), to make at least one pressured portions of extreme areas (a) of the flangs (r) coincident with the corner areas of the corner of the box (b), after the bending of these flangs (R) by the first forming members (64a) and/or the second forming members (64b) in cooperation with the faces (58, 59) Folders of flanges. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

MACHINE FOR THE FORMATION OF BOXES FROM PLATES

TECHNICAL SECTOR

The present invention concerns a machine for forming boxes from plates, said boxes having a bottom portion surrounded by four side walls facing two by two that delimit four corner areas of the box, and rims located on the bottom. top of the side walls surrounding the box and projecting in cantilever towards the outside of the box providing a support for a closing sheet. The closing foil is, for example, a plastic and/or cardboard foil, among others. For example, said closure is by sealing, heat sealing or gluing.

BACKGROUND OF THE INVENTION AND TECHNICAL PROBLEM TO SOLVE

Document US4832675A describes a machine for forming boxes with flanges located on the upper part of the side walls of the boxes and folded towards the outside of said boxes, the peripheral flanges or wings projecting laterally in cantilever to allow an improved sealing and increased strength, these ridges form a so-called flange. In the machine, a core 58 with a block 120 is insertable and removable from a cavity 54 of a mold having mounted on its top a flange mounting denominator assembly 118, formed by forming members 128 movable by a pair of fluid cylinders or hydraulics 132 in the vertical direction of the movement of the core, independently of the movement of the core 58 in and out of the cavity 54 of the mold, allowing the use of cardboard sheets of different calibers (different thicknesses). The set of movable forming members 128 form a frame connected to the pair of fluid dynamic or hydraulic cylinders and are vertically movable, being arranged to bend four ridges 42 which extend superiorly from respective side walls 38 of the box 32 forming a flange with the ridges . Thus, when the pistons 138 of the cylinders move with respect to the male 58, they cause all the forming members 128 to bend the rims 42 of the box to be formed and press the rims 42 against saw teeth 66 of delimiting bars 64 of the box. cavity 54, pressing the forming members 128 the rims 42 in the four corners of the box (B) to the same horizontal tightening plane (see Figs. 9, 15 and 16).

Documents ES1258339U and ES2851825A1, by the same inventor as the present application, disclose machines 100 for forming boxes B with rims R located at the top of the side walls PL of boxes B and folded towards the outside of said boxes. boxes, cantilevered, to facilitate a later closure, for example by sealing, of an upper open part of the box. The machines of both documents have an inverted truncated pyramid shaped core and core forming device mounted on the rear side 63 of the core for bending the ridges R. The core forming device is operatively connected to a core actuator 66, whose Activation is independent of a core drive 10 that vertically moves the core in opposite directions into and out of a cavity 52 of a mold 50.

In both documents ES1258339U and ES2851825A1, the cavity 52 is delimited at least partially by some forming elements of the box B arranged around the cavity 52, and the forming elements of the box B include a plurality of forming stops 56 mutually facing each other. The plurality of forming stops 56 include rim-forming faces 58, 59 configured to, at the abutting positions of each forming stop 56, receive pressure from the rims R folded outwardly by the rim-forming device 64. Each of said forming stops 56 is movable between a respective stop position, towards the interior of the cavity 52, and a respective retracted position, allowing the plurality of forming stops 56 movable between the stop and retracted positions to evacuate the boxes B formed from the cavity 52 passing through the outlet mouth 55, dimensioned to evacuate said boxes B.

Continuing with the documents ES1258339U and ES2851825A1 of the same inventor as the present application, in the background section, documents US2925758A, GB1490301A and CA1121199A are explained, which present machines for forming boxes with peripheral rims located in the upper part of the four walls sides of the box and folded towards the outside of the boxes, and in the background section of documents ES1258339U and ES2851825A1 the severe drawbacks of the machines of documents US2925758A, GB1490301A and CA1121199A are cited here by explicit reference, related to a low production speed of boxes in combination with complex mechanisms and excessive dimensions.

Document ES1273399U discloses a machine for forming boxes 20 in which a core 2 is inserted and extracted vertically in relation to a mold cavity, by means of a linear vertical displacement caused by a drive of the core 2 where such core is supported. The formed boxes 20 are evacuated through an outlet mouth located below an inlet mouth of the plate to be formed.

The box 20 has rims 212, 222 or wings, located at the top of some side walls 21 and front walls 22, respectively, of the boxes 20 and said wings 212, 222, are folded towards the outside of said boxes 20 to allow sealing closure of the upper part of the box 20. The folding of the wings 212 of the side walls 21 is obtained by the displacement of some lateral presses 8 that act on said side walls 21 until they are folded in a horizontal position when contacting a fixed frame 6 to male 2.

To carry out the folding of the wings 222 of the side walls 22, the side presses 8 are not withdrawn, but the position they reach when folding the side walls 21 is used so that some slats 72 of a mobile frame 7, associated to the male and with independent movement thereof, tighten said wings 222 of the front walls 22 against a surface 81 of the lateral presses 8, thereby ensuring that the ends of the wings 222 remain above the ends of the wings 212 (see Fig.8).

As explained in documents US4832675A and ES1273399U, a pressure of the rims or wings of the side walls of the box, up to the same horizontal clamping plane, by means of some forming elements mounted on the upper side of the male and movable in relation to the male projecting laterally, but since the forming elements are integrated into a single frame or movable forming element, they do not allow or at least hinder an adaptation of the machine that allows covering a range of thicknesses of the plates to be formed in a box in the machine, nor does it make it possible to form boxes from low-quality plates.

The machine of document ES1273399U also comprises a fixed frame 6 configured to cooperate in the bending of said lateral wings 212 of the lateral walls 21 and 222 of the front walls 22. The fixed frame 6 is rigidly assembled on the rear side of the core 2 by means of a series of detachable joints in a fixed position (see Fig. 2).

Such arrangement of the fixed frame 6, determines that, in the event of a change in the caliber or thickness of the plate or defects in the plate, firstly, the fixed frame 6 must be disassembled or extracted from its position of use by means of the removable joints, and, subsequently , the fixed frame 6 must be replaced by a different piece or supplemented with a custom-made supplement piece. Additionally, the dimensions of these replacement or supplement parts would be very demanding, that is, the measurements of these parts should be very exact, in order to form boxes from this wide range of plates with different sizes and/or qualities. In addition, these replacement or supplement parts would not be available at the machine site when these situations occur, leading to undesired long production downtime.

On the other hand, a fixed frame to bend some flanges located in the upper part of the side walls of a box has been widely used in the sector, thus the previously referred document US2925758A discloses a fixed frame 9, also the previously referred document GB1490301A discloses a fixed frame 64 of the male shown in Figs. 6 to 8 and second movable forming members 57. Additionally, document US3618481A discloses fixed members corresponding to strips called leaf springs 52 fastened between the mobile frame 20 and the male 19 and are shown in Figs. 4 to 6 and the mobile frame 20 is movable along the vertical direction of the pin 12 with respect to the pin 19.

The technical problem to be solved in view of the previously exposed state of the art is the formation of cardboard boxes with cantilevered rims or wings located at the top of their side walls and folded outwards, as explained, with a high forming speed, simplicity and efficiency, avoiding unwanted production stops and making the machine robust, but mainly allowing the formation of such boxes from plates that can include cardboard of different calibers, thus enabling an increase in the range of thicknesses of the plate to be formed into a box, while such boxes are obtained minimizing or even eliminating undesired production stops due to, for example, defects or deformations that may be present in poor quality cardboard, such as, for example, faulty die-cutting, including faulty crease lines and/or faulty cut-crease lines, or even unwanted formations, including unwanted tolerances of flat plate curvature.

EXPLANATION OF THE INVENTION

To solve the drawbacks set forth in the previous section, the present invention presents a machine for forming boxes from plates.

Said boxes have a bottom portion surrounded by four side walls facing two by two that delimit four corner areas of the box, and some rims located in the upper part of the side walls surrounding the box and projecting in a cantilever towards the outside of the box with the ridges providing a support for a closure sheet.

The machine comprises a mold defined by a cavity with an input mouth for a sheet, and an output mouth for a box formed facing and aligned with the input mouth.

The cavity is at least partially delimited by box-forming elements that include a plurality of rim-forming faces arranged around the cavity. The plurality of rim-forming faces are movable between a retracted position, which allows the ejection of a box with said cantilevered rims, through the cavity, and a stop position in which the rim-forming faces they at least partially obstruct the perimeter of the cavity to form the rims.

Among others, the present invention expressly covers the following possibilities: a cavity delimited at least partially by two box-forming elements with at least one rim-forming face each, a cavity delimited at least partially by four box-forming elements at least one rim-forming face each, a cavity delimited at least partially by eight box-forming elements with one rim-forming face each, where preferably in any of these possibilities each box-forming element is movable by means of a respective forming actuator.

The machine also comprises a core provided with a bottom-forming face surrounded by four wall-forming faces facing two by two that delimit four corner-forming areas of the machine, preferably in correspondence with the position of the four corner areas of the box during the forming of the cantilever flanges.

The core is movable in a linear Z direction by a core driver in opposite directions into and out of the mold cavity. The bottom-forming face is configured to press the bottom portion of a plate positioned at the entry mouth, introducing it into the cavity during the insertion movement of the core.

Preferably, the linear Z direction corresponds to a vertical direction, the vertical direction being that direction perpendicular to a plane where the machine sits. Alternatively, the linear direction Z may optionally correspond to a direction parallel to a plane where the machine sits.

The core has associated with it a rim-forming device configured to cooperate in bending the rims with respect to the lateral walls towards the outside of the boxes and/or pressing the rims against the forming elements of the box.

In the machine, the rim-forming device comprises at least two mutually facing first forming members associated with two opposite wall-forming faces. Each of said first forming members protrudes from a corresponding wall-forming face towards the outside of the core, said first forming members being superimposed on the rim-forming faces, when these rim-forming faces are in the stop position.

The machine further comprises a plurality of second corner-acting forming members arranged around the core. Every second training member it is disposed in a corner forming area of the machine.

The second forming members are movable, by actuators of the second forming members, to carry out at least one pressing of some overlapping portions of some end zones of the rims coinciding with the corner zones of the box, after the bending of said rims by part of the first forming members and/or the second forming members in cooperation with the rim-forming faces.

Thanks to the movement of the second forming members acting on the corners by means of actuators of the second forming members, the second forming members are enabled to adequately press the overlapping portions of the end areas of the rims coinciding with the corner areas of the box, by means of a pressure that may be different in some corner areas of the box with respect to the others, allowing the formation of such boxes from plates of different calibers, thus enabling an increase in the range of thicknesses of the plate to be formed in a box in the machine, and increasing the range of plate qualities suitable for being formed in the machine, while obtaining such boxes, reducing or even eliminating unwanted production stops.

In one option, the plurality of second forming members are associated with the core overlying the wall-forming faces.

Thus, the second forming members may optionally be mounted on a rear portion of the core, opposite a front portion of the core where the bottom forming face of the core is located.

In another option, the plurality of second forming members are associated with the mold at least partially delimiting the cavity.

Preferably, in this other option, the second forming members are supported in the mold on the box-forming elements.

In addition to this other option, the plurality of second forming members are integrated in faces of the plurality of forming faces. Also, the rim-forming device further comprises a plurality of third forming members arranged around the core. Each third forming member is disposed in correspondence with a corner forming area of the machine, overlapping the wall forming faces. The plurality of third forming members are configured to cooperate with pressing by the second forming members.

Preferably, the plurality of second forming members comprises four second corner actuating forming members, each of said second forming members being individually movable, independently of one another, and each second corner actuating forming member being configured to individually press a respective zone. of corner of the flanges of the box.

Optionally, the second forming member actuators comprise four actuators, and each of the four second forming members is movable by a respective actuator.

Alternatively to the above preferred option, the second forming members are independently movable in pairs, and each pair of second forming members is movable by a respective second forming member actuator connected to a respective pair of second forming members.

Optionally, the second forming members are movable independently of displacement of the core along the linear direction.

In addition to this optional option, the second forming members may be movable by the second forming member actuators whether the core is moved by the core driver or the core is stationary.

Preferably, the at least two first forming members are in turn movable with respect to the wall-forming faces of the core, independently of the displacement of the core along the linear direction, by means of at least one position regulator, when the core is stationary. This position regulator avoids dismantling or extracting the first forming members from their position of use to accommodate the machine to plates of different calibers (thicknesses) and/or qualities.

Preferably, each forming member is individually positionable, relative to the core, by means of a respective positioner.

Preferably, the box-forming elements further include at least four sidewall-forming faces movable between respective retracted positions adjacent the cavity and respective abutment positions toward the interior of the cavity, disposed about the cavity. The at least four side wall-forming faces in their stop positions are configured to press an outer part of the box against the four wall-forming faces of the core, towards the interior of the cavity, during said pressing of the plurality of seconds training members.

Optionally, the four faces that form the side walls have slopes with respect to the complementary Z linear direction with some inclinations of the wall-forming faces of the core.

Optionally, sidewall-forming faces are further integrated into the plurality of box-forming elements including a plurality of rim-forming faces.

In one option, the box-forming elements further include benders, to bend side walls with respect to the bottom portion of the plate, integrated in the plurality of box-forming elements that include a plurality of rim-forming faces.

Optionally, the doublers are the at least four sidewall-forming faces.

Optionally, the benders are bending ridges integrated into the box-forming elements that include a plurality of rim-forming faces.

Alternatively or additionally, bending ridges are integrated into at least two of said mutually opposed box-forming elements, the bending ridges being configured to fold at least two mutually opposing rims relative to their respective sidewalls.

Optionally, the box-forming elements further include a plurality of benders to bend side walls with respect to the bottom of the plate.

Optionally, the second forming members are movable by the plurality of actuators between respective standby positions and respective working positions. In the working positions, the second forming members protrude with respect to a periphery of the core defined by the wall-forming faces thereof. Each second forming member comprises a forming member configured to finish bending or bending at least one rim outwards with respect to the side walls and to press this at least one rim into the protruding working position.

Optionally, the machine may comprise two or more molds, two or more cores, each core mutually facing and aligned with a respective cavity of each mold, and two or more rim-forming devices, and two respective pluralities of second forming members, each one of the rim-forming devices and pluralities of corresponding second forming members with a mold and core assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other advantages and characteristics will be more fully understood from the following detailed lists of embodiments with reference to the attached drawings, which are to be taken by way of illustration and not limitation, in which:

Figs. 1, 3, 5, 7, and 9 are plates from which the boxes of Figs.

2, 4, 6, 8 and 10, respectively, by means of the box forming machine from plates of the present invention, and where the glue applied on the plates is indicated;

Figs. 2, 4, 6, 8 and 10 are respective top perspective views of boxes that can be formed by the box-forming machine from plates of the present invention, and in which parts of the box have been shown artificially transparent to show the glue applied by the machine;

Fig. 11 is a schematic profile view of a first embodiment of the box forming machine from plates of the present invention;

Fig. 12 is a top perspective view of Fig. 11, with the plate guides and plate of Fig. 11 omitted for clarity;

Fig. 13 is a top perspective view of the core, rim-forming device and plurality of second forming members of Fig. 11;

Fig. 14 is a bottom perspective view of Fig. 13;

Fig. 15 is an exploded top perspective view of Fig. 13;

Fig. 16 is a plan view of Fig. 13;

Fig. 17 is the sectional view according to section A-A indicated in Fig. 16;

Fig. 18 is a partially cutaway plan view of a second embodiment of the machine of the present invention;

Fig. 19 is a top perspective view of box-forming elements including a plurality of rim-forming faces of the machine of Fig. 18;

Figs. 20 and 21 are profile and elevation views of another embodiment of the core, the rim-forming device and the plurality of second forming members according to a third embodiment of the machine;

Figs. 22, 25 and 27 are plan views, in upper perspective and in lower perspective, respectively, of the mold of a fourth embodiment of the machine, which includes the core and rim-forming device associated with the core of Figs. 13;

Fig. 26 is the detail view V indicated in Fig. 25;

Fig. 23 is a plan view of the mold of Fig. 22, in which the box-forming elements including a plurality of rim-forming faces are in their retracted positions, and in which the rim-forming faces and elements box formers aligned with the longitudinal direction X in Fig.22 have been omitted for clarity;

Fig. 24 is a view analogous to Fig. 23, now with the box-forming elements including a plurality of rim-forming faces in their retracted positions;

Fig. 28 is a top perspective view of a fifth embodiment of the slab boxing machine of the present invention, and showing a box in the cavity;

Fig. 29 is a top perspective view of a mirror image of some box-forming elements of the mold of the machine of Fig. 28;

Fig. 30 is a top perspective view of one of the box-forming elements of the mold with rim-forming faces and lateral wall-forming faces, embodied in a forming stop, part of Figs. 28 and 29, and where the box of Fig. 28 is also shown;

Figs. 31 and 32 are profile and elevation views of the core and the rim-forming device of a sixth embodiment of the machine of the present invention;

Fig. 33 is a top perspective view of the mold and the plurality of second forming members of the sixth embodiment of the machine of the present invention, where the core of Figs. 31 and 32 is insertable and removable; Y

Fig. 34 is a plan view of a seventh embodiment of the machine of the present invention.

DETAILED EXPOSITION OF EMBODIMENTS / EXAMPLES

Figs. 1, 3, 5, 7, and 9 are plates (P) from which the boxes (B) of Figs. 2, 4, 6, 8 and 10, respectively, by means of the box (B) forming machine (100) from plates (P) of the present invention that will be described later.

These boxes (B) have a bottom portion (F) surrounded by four side walls (PL) facing each other two by two that delimit four corner areas of the box, and rims (R) located at the top of the side walls (PL) surrounding the box (B) and they cantilever towards the outside of the box (B) providing a support for a closing sheet.

Preferably, the rims (R) of the boxes (B) are flat and horizontal, as shown in Figs. 2, 4, 6, 8 and 10, forming a flat frame with a continuous and peripheral rim in the upper part of the side walls (PL) and parallel to the bottom portion (F) of the box (B), facilitating a later upper closing operation by means of a closing sheet, for example, a plastic and/or cardboard sheet, among others. For example, said closure is by sealing, heat sealing or gluing.

Preferably, each of these four box corner regions (B) may not include a chamfered side wall (PL) as in Fig. 2, but may include a chamfered side wall (PL) as in Figs. 4, 6 and 8, or they may include two or more chamfered sidewalls (PL) as in Fig. 10. Thus box (B) may have four sidewalls (PL) as in Fig. 2, eight side walls as in Figs. 4, 6 and 8, or twelve lateral walls (PL) as in Fig. 10, surrounding the respective bottom portions (F) of each box (B).

Figs. 2, 4, 6, 8 and 10 show overlapping portions of end zones (A) of the rims (R) coinciding with the corner zones of the box (B).

Preferably, as shown in Figs. 2, 4, 6, 8 and 10, these overlapping portions include glue (CC), in the form of glue points or glue beads, to join rims to one another in the corner areas of the box (B).

Preferably, said glue (CC) is deposited on the plate (P), as shown in Figs.

1, 3, 5, 7 and 9.

Preferably, as shown in Figs. 1-10, weakened rim fold lines (LR) join the sidewalls (PL) to the rims (R) to facilitate folding the rims (R) relative to the sidewalls (PL) to form the boxes ( B).

Preferably, following in Figs. 1 through 10, weakened sidewall fold lines join the bottom portion (F) to the sidewalls (PL) to facilitate folding of the sidewalls (PL) relative to the bottom portion (F) to form the sides. boxes (B).

In the boxes (B) of Figs. 4 and 6, the eight side walls (PL) are end-to-end (on edge), that is, they are not joined laterally to each other, but through the rims (R) located at the top of the side walls (PL) and joined together in the corner areas of the box (B).

In Figs. 2, 8 and 10, the eight side walls (PL) are joined laterally to each other at through lateral flaps (SL) derived from the lateral walls (PL). The lateral flaps (SL), and/or the lateral walls (PL), have glue (C) deposited for said union, preferably by means of points or cords of glue (CC).

The characteristics common to all the embodiments of the machine (100) for forming boxes (B) from plates (P) of the present invention shown in Figs. 11 to 34.

The machine (100) comprises a mold (50), a core (15), and a rim-forming device.

Said mold (50) is defined by a cavity (52) with an input mouth (54) of a sheet (P), an output mouth (55) of a box (B) formed, facing and aligned with the mouth of input (54).

The cavity (52) is further at least partially delimited by box-forming elements that include a plurality of rim-forming faces (58, 59). These box-forming elements are materialized in forming stops (56), arranged around the cavity (52) and movable between a retracted position, which allows the expulsion of a box with said cantilevered rims (R), through the cavity (52), and a stop position in which the rim-forming faces (58, 59) at least partially obstruct the perimeter of the cavity (52) to form the rims (R).

Said core (15) is provided with a bottom-forming face (65) surrounded by four wall-forming faces (62) facing each other two by two that delimit four corner-forming areas of the machine (100), in correspondence with the position of the four corner areas of the box (B), during the shaping of the cantilevered rims (R).

The core (15) is movable in a linear direction (Z), preferably guided, by a core actuator (10) in opposite directions of introduction and extraction from the cavity (52) of the mold (50).

The bottom-forming face (65) is configured to press the bottom portion (F) of a plate (P) positioned in the inlet mouth (54), introducing it into the cavity (52) during the insertion movement of the core (15). ).

The male (15) has an associated rim-forming device configured to cooperate in bending the rims (R) with respect to the side walls (PL) towards the outside of the boxes (B) and/or pressing them against the forming elements of the box (B).

The rim-forming device comprises at least two mutually facing first forming members (64a), associated with two opposite wall-forming faces (62), each of said forming members (64a) protruding from a corresponding wall-forming face (62). towards the outside of the core (15) and overlapping the rim-forming faces (58, 59), when these rim-forming faces (58, 59) are in the stop position.

Said machine (100) comprises a plurality of second forming members (64b), acting in corner areas of the box, arranged around the core (15). Each second forming member (64b) is disposed in a corner forming area of the machine (100).

The second forming members (64b) are movable by actuators (66) of second forming members (64b) to carry out at least one pressing of some overlapping portions of some end zones (A) of the rims (R) coinciding with the zones of corner of the box (B), after the bending of said rims (R) by the first forming members (64a) and/or the second forming members (64b) in cooperation with the forming faces (58, 59) of ridges.

In all embodiments, four forming members (64a) facing each other in pairs are shown to be associated with the plug (15) overlying the wall-forming faces (62).

Alternatively, in an option not shown, the four forming members 64a may be associated with the mold 50 by at least partially delimiting the cavity 52 of the mold 50.

Optionally, in all embodiments the rim-forming device may comprise two mutually facing forming members 64a for bending the rims relative to the sidewalls in cooperation with the rim-forming faces, preferably on the long sidewalls (PL). , and/or the folding of the short side walls (PL) is by means of a displacement of second forming members (64b).

In another option, the four mutually facing rims (R) of the side walls (PL) are folded by means of the second forming members (64b), which are movable by means of the plurality of actuators (66), between respective waiting positions and respective working positions projecting with respect to a periphery of the core (15) defined by the wall-forming faces (62) thereof. Each second forming member 64b comprises a forming member configured to finish bending or bending at least one rim (R), towards the outside with respect to the side walls (PL) and to press this at least one rim (R) into the protruding working position. In one option, this bending is by means of said displacement of the second forming members (64b) for bending, a displacement that is different from the displacement for pressing, or the same displacement of the second forming members (64b) bends and presses the rims (R).

In the first, second, third, fourth and fifth embodiments of the machine (100) of Figs.

11-30, the plurality of second forming members (64b) are associated with the core (15) overlying the wall-forming faces (62) of the core (15).

In Figs. 11 to 30, the second forming members (64b) are mounted on a rear part (63) of the core (15), opposite to a front part (61) of the core (15) where the bottom forming face (65) is located. ) of the male (15).

Preferably, the second forming members (64b) are mounted on a rear portion (63) of the core (15) and supported on a base support (73) fixed to a support member (12) of the core driver (10) that supports the core. male (15) by a connection end (11) of the support member (12), as shown in Figs. 13, 18, 20, and 28.

In another option, not shown in the figures, the second forming members (64b) are mounted on a rear part (63) of the core (15) and supported on a core of the core (15) that integrates the wall-forming faces (62). ).

In the sixth and seventh embodiments of the machine 100 of Figs. 31-34, the plurality of second forming members 64b are associated with mold 50, at least partially delimiting cavity 52, and supported in mold 50, preferably as shown in Figs. 33 and 34 in the box forming elements.

Alternatively, in an option not shown, the plurality of second forming members (64b) are associated with the mold (50) supported on plate guides (40) as shown in Figs. 11 and 28 that will be described later, and/or supported on a chassis, and/or in general any position of the machine (100) that at least partially delimits the cavity (52) of the mold (50) during, at least, the operation of the machine.

In the sixth and seventh embodiments of the machine 100 of Figs. 31-34, the plurality of second forming members (64b) are movable in conjunction with one of said rim-forming faces (59) between the retracted and abutting positions, and the second forming members (64b) are supported on actuator mounts. (66s).

In Fig. 33 of the sixth embodiment of the machine (100), the plurality of second forming members (64b) are superimposed on one of said rim-forming faces (59) of said box-forming elements

In Fig. 34 of the sixth embodiment of the machine (100), the plurality of second forming members (64b) are integrated in faces (59) of the plurality of forming faces (58, 59), and the actuators (66) ) is attached to the forming stops (56) mutually facing each other along the linear direction (Y). Also, the rim-forming device further comprises a plurality of third forming members (64c) arranged around the core (15). Each third forming member 64c is disposed in correspondence with a corner forming zone of the machine 100, overlapping the wall forming faces 62, the plurality of third forming members 64c being configured to cooperate with a pressing by the second forming members (64b).

In Fig. 34, at least two forming members (64a) have extensions corresponding to the third forming members (64c) at both of their longitudinal ends.

In an alternative option, not shown in the figures, the third forming members 64c may each arise from one end of each of the four forming members 64a.

Alternatively, in still other options not shown in the figures, the third forming members 64c and/or the forming members 64a may be embodied in a single piece or in respective individual pieces, and/or may be machined on the same core of the male (15) that integrates the wall-forming faces (62).

Following the first, second, fourth, fifth, sixth and seventh embodiments of the machine (100) of Figs. 11-19 and 22-34, the plurality of second forming members 64b comprises four corner actuating second forming members 64b, each of said second forming members 64b being individually movable, independently of one another, and each The second corner actuating forming member (64b) is configured to individually press a respective corner area of the rims (R) of the box (B).

Continuing in these figures, actuators (66) of second forming members (64b) comprise four actuators (66), and each of the four second forming members (64b) is movable by a respective actuator (66).

Now following the third embodiment of the machine (100) of Figs. 20 and 21, the second forming members 64b are independently movable in pairs. In addition, each pair of second forming members 64b is movable by a respective second forming member actuator 66 connected to a respective pair of second forming members 64b.

Common to all the embodiments of the machine (100), each actuator (66) is embodied in an actuator provided with a first fixed part (66a) and a second movable part (66b) with respect to the first part (66a).

Also common to all embodiments of the machine (100), the second forming members (64b) are movable independently of the displacement of the core (15) according to the linear direction (Z).

To achieve this independence between male (15) and forming members (64b), the actuators may be elements that can be activated by means of an activation signal, thus, for example, the actuators include the case of fluid dynamic cylinders, for example, pneumatic cylinders (66) as shown in Figs. 11 to 34, or alternatively the actuators comprise electric motors (not shown in the figures), or a combination thereof, among other options.

The movement of the second forming members 64b, independently of the movement of the core 15 along the linear direction (Z), includes any movement that includes a component of movement along the linear direction (Z). Thus, the present invention expressly covers a linear movement along the linear direction (Z) as in the case detailed in Fig. 17 thanks to the guidance provided by the fixed part (66a) to the movable part (66b), an articulated movement that comprises a component of movement according to the linear direction (Z) through at least one axis of rotation (not shown in the figures), for example the axis of rotation of a rotating fluid dynamic cylinder or the rotary axis of an electric motor, and/or a combination of these movements, among other options.

Optionally, Figs. 15 to 17 show that the second forming members (64b) are movable when the core (15) is immobile, by means of a base support (73) mounted on the rear part (63) of the core (15), linearly movable with respect to the face core bottom former (65) in the linear direction (Z) to adjust the position of the second former members (64b).

Optionally, in Figs. 15 to 17 the second forming members (64b) are movable, when the male (15) is stationary, by means of a position adjuster mounted on the rear part (63) of the core (15), to position the second forming members (64b), according to a longitudinal (X) and/or transverse (Y) direction perpendicular to the linear direction (Z), of displacement of the core ( 15), when the male is motionless.

The optional position adjuster comprises adjustment supports (74) that can be moved with respect to a base support (75) where the adjustment supports (74) are supported, and a locking and unlocking element (76) for the adjustment supports ( 74) with respect to the base supports (75).

Continuing in the first to sixth embodiments of the machine (100) of Figs. 11 to 33, the at least two first forming members (64a) are in turn movable with respect to the wall-forming faces (62) of the core (15), preferably towards or away from it, regardless of the displacement of the core (15) according to the linear direction (Z), by means of at least one position regulator (80), shown in detail in Figs. 15 and 17, when the male (15) is immobile.

This displacement of the at least two first forming members (64a) with respect to the wall-forming faces (62) by means of at least one position regulator (80), includes any displacement that includes a component of displacement according to the linear direction (Z) , expressly covering a linear displacement along the linear direction (Z) as in the case of Figs. 11 to 17, an articulated displacement comprising a component of displacement according to the linear direction (Z), and/or a combination of these displacements, among other options.

Continuing in Figs. 15 to 17, the rim-forming device preferably comprises four forming members (64a), each one individually positionable, in relation to the male (15), by means of a respective position regulator (80), thus having the machine (100) four regulators of position (65).

Each position regulator (80) comprises at least one first threaded rod (71) with a threaded edge (71b). The first threaded rod (71) is mounted on a rear part (63) of the plug (15), opposite to a front part (61) of the plug (15) where the bottom-forming face of the plug (15) is located.

The position regulator (80) further comprises a portion (71a) adapted to rotate the first threaded rod (71), preferably by means of a tool and/or manually, said rotation causing a linear displacement, which is parallel to the linear direction ( Z), of a forming member (64a) with respect to the wall-forming faces (62) of the core (15).

Preferably, the position regulator (80) comprises a fixed rod (70) with threads in at least one of its end portions (70b, 70a), and is fixed by a proximal end portion (70b) thereof at the rear. (63) of the male (15) in a threaded hole (70b').

Preferably, as shown in Figs. 15 and 17, the fixed rod (70) is inserted in the first threaded rod (71) and the first threaded rod (71) is supported on the rear side of the male (15) so that before the rotation of through the portion ( 71a) of the first threaded rod (71), the first threaded rod (71) rotates without linear displacement, causing displacement of the forming member (64a).

Optionally, the position regulator (80) comprises a locking and unlocking element (72) for the rotation of the first threaded rod (71), threaded on the distal end portion (70a) of the fixed rod (70).

Optionally, the forming member (64) is supported by a positioning member (68) movable with respect to a base member (67) to position the forming member (64) along a longitudinal (X) and/or transverse (Y) direction perpendicular to the linear direction (Z) of displacement of the male (15), when the male is stationary. Optionally, the position regulator (80) comprises a second blocking and unblocking element (69) of this displacement of the positioning member (68).

Preferably, Figs. 13 to 17 show that each positioner (80) comprises two first threaded rods (71) and two corresponding fixed rods (70) for moving a forming member (64a).

Common to all embodiments of machine 100, Figs. 12, 18, 19, 22 to 27, 30, 33 and 34 show the box forming elements further include at least four side wall forming faces (C1, C4), movable between respective retracted positions adjacent to the cavity (52) and respective stop positions towards the interior of the cavity (52).

The at least four side wall forming faces (C1, C4) are arranged around the cavity (52), the at least four side wall forming faces (C1, C4) being in their abutment positions configured to press an outer part of the box (B) against the four wall-forming faces (62) of the core (15), towards the interior of the cavity (52), during said pressing of the plurality of second forming members (64b), which confers precision to the positioning of the side walls for, subsequently, precisely finish the shaping of the rims (R) projected out of the box (B), enabling the formation of plates of different calibers and qualities.

In the first, fourth and sixth embodiments of the machine 100, Figs. 12, 24 and 33 show that two box-forming elements movable by means of respective forming actuators (36), preferably pneumatic cylinders provided with a movable part (36b), according to the transverse direction (Y) include seven lateral wall-forming faces (C1, C2, C3, C4, C3, C1, C1) each. Following on from these embodiments, Figs. 12 to 17, 31 and 32 show that the core (15) comprises four wall-forming faces (62) facing two by two that delimit four corner-forming areas of the machine (100), and the core (15) comprises in each corner forming zone of the machine (100) two chamfered wall-forming faces (62), the core (15) thus having twelve wall-forming faces (62). Thus, these embodiments of the machine (100) are configured for the formation of the box (B) of Fig. 10 of twelve side walls (PL) surrounding the bottom portion of the box (B).

Additionally, in the fourth and sixth embodiments of the machine 100, Figs. 22 to 27 and 33 show that, preferably, the side wall forming faces (C3, C2, C1) located at both end zones of each of the two side wall forming faces (C4) are integrated in respective presses (46) . Each press (46) is movable around a joint (48) by a respective press actuator (47) mounted on an auxiliary support (23) attached to the movable part (36b) of the forming actuator (36) to ensure a pressing appropriate.

Preferably, the shaping actuators (36) are preferably guided by means of actuator guides (37), either integrated in the shaping actuators (36) or the actuator guides (37) being independent pieces coupled to independent guide elements (38). such as linear skates.

Continuing in the fifth embodiment of the machine (100) of Figs. 28 to 30, the core (15) further comprises, in each corner-forming area of the machine (100), a wall-forming face (62) chamfered , the male (15) thus having eight wall-forming faces (62). The mold (50) has a total of sixteen lateral wall-forming faces partially delimiting the cavity (52). Thus, the machine (100) is configured for the formation of the boxes (B) with eight side walls (PL) surrounding the bottom portion of the box (B) of Figs. 4, 6 and 8.

In the second and seventh embodiments of the machine 100, Figs. 18, 19 and 34 show that two movable box-forming elements by means of forming actuators (36), preferably pneumatic cylinders, according to the transverse direction (Y), include three faces that form lateral walls (C1, C4, C1) each. Figs. 18 and 34 show that the core (15) comprises four wall-forming faces (62) facing two by two that delimit four corner-forming areas of the machine (100), and the core (15) does not necessarily need in each forming area corner of the machine (100) chamfered wall-forming faces (62), the male (15) thus having four wall-forming faces (62). Thus, these embodiments of the machine (100) are configured for the formation of the box (B) of Fig. 2 with four side walls (PL) surrounding the bottom portion of the box (B).

Optionally, in all the embodiments, the at least four lateral wall-forming faces (C1, C4) have inclinations with respect to the linear direction (Z) complementary to the inclinations of the wall-forming faces (62) of the core (15) , to allow later insertion of some boxes (B) inside other boxes (B).

Optionally, in all embodiments, sidewall-forming faces (C1, C4) are further integrated into the plurality of box-forming elements, including a plurality of rim-forming faces (59). These box-forming elements are materialized in forming stops (56).

Alternatively, in an option not shown in the figures, the side wall-forming faces (C1, C4) are integrated in other additional box-forming elements of the box-forming elements that include the plurality of faces (58, 59) flange formers.

In the first, second, third, fourth, sixth and seventh embodiments of the machine (100), the forming elements of the box (B) also include benders to bend side walls (PL) with respect to the bottom (F) of the plate ( P) integrated in the plurality of box-forming elements that include a plurality of faces (58, 59) forming rims, materialized in forming stops (56).

In the second and seventh embodiments, Figs. 18, 19 and 34 show that these doublers are the portions proximal to the entrance mouth of the cavity (52) of at least four of the six faces that form the side walls (C1, C4, C1, C1, C4, C1), arranged to fold lateral walls (PL) with respect to the bottom (F) of the plate (P). In one case, the sidewall-forming faces (C1, C4, C1, C1, C4, C1) fold four sidewalls (PL) with respect to the bottom (F), and the two box-forming elements that include a plurality of faces (58) rim formers movable along the longitudinal direction X also bend two mutually opposite side walls (PL) of these four side walls (PL), preferably previously. In another case, the sidewall-forming faces (C1, C4, C1, C1, C4, C1) fold four sidewalls (PL) with respect to the bottom (F), and the box-forming elements that include a plurality of faces ( 58) rim formers movable along the longitudinal direction X do not participate in this bending.

In another option, in all the embodiments of the machine (100), bending edges (AH) are integrated in at least two of said mutually opposed box-forming elements, materialized in forming stops (56). The bending edges (AH) configured to bend at least two mutually opposite rims (R) with respect to their respective side walls (PL).

Optionally, in all embodiments of the machine (100), the benders are bending edges (AH) integrated in the box-forming elements that include a plurality of rim-forming faces (58, 59), materialized in forming stops (56). ).

Optionally, in all embodiments of the machine 100, these bending edges AH bend the flanges R relative to the sidewalls PL in cooperation with the forming members 64a of the flange forming device.

In the fifth embodiment of the machine (100) of Figs. 28 to 30, the box-forming elements (B) also include a plurality of benders (51, 53) to bend side walls (PL) with respect to the bottom (F) of the plate (P). Thus, to bend the side walls (PL) with respect to the bottom (F) of the plate (P), a first bending is performed by the plurality of benders (51, 53), followed by a subsequent bending by the forming stops ( 56).

The operation of the fourth embodiment of the machine (100) of Figs. 13 to 17 and 22 to 27, although it has been previously exposed.

Glue (CC) is deposited on the plate (P) of Fig. 9 and the plate is positioned between the male (15) of Fig. 13 and the mold (50) of Fig. 25, where it is supported by plate guides (40), as shown in Fig. 11 of the first embodiment.

Next, the bottom-forming face (65) of the core (15) presses the bottom portion (F) of the plate (P) positioned in the inlet mouth (54), introducing it into the cavity (52) of the mold (50). during the insertion displacement of the male (15).

Preferably, during the insertion movement of the core (15), the plate guides (40) and/or optional plate support elements (not shown), act identically to a plurality of benders that partially delimit the mold cavity (52) at the inlet mouth (54) to bend two mutually opposite side walls (PL) previously supported on the plate guides, with respect to the bottom portion ( F). The other two mutually opposite side walls (PL) are folded, with respect to the bottom portion (F) by means of box-forming elements materialized in a plurality of doublers (51) that partially delimit the cavity (52).

With the introduction of the core (15) in the cavity (52), the box-forming elements that include the plurality of faces (58), materialized in forming stops (56) mutually facing each other along the linear direction (X) are moved by means of some forming actuators (36) along the linear direction (X) from their retracted position (not shown) to the stop position of Figs. 22 to 27 to bend two opposite side walls (PL) with respect to the bottom portion of the box (B).

Once the forming stops (56) facing each other have moved along the linear direction (X), and/or during their displacement, the other box-forming elements that include the plurality of rim-forming faces (59), materialized in shaping stops (56) mutually facing each other along the linear direction (X) and having integrated side wall shaping faces (C1, C2, C3, C4, C3, C2, C1), they are moved along the linear direction (Y) by shaping actuators (36), and articulated by press actuators (47), from the retracted position of Fig. 23 to the stop position of Figs. 22 and 24 to 27.

With the displacement of the two shaping stops (56) facing each other along the linear direction (Y), the side walls (PL) fold again with respect to the bottom portion of the box (B), positioning them in their final shaping position. in the box (B), and the box-forming elements materialized in the forming stops (56) of the linear direction (Y) press the side walls (PL), by means of side wall-forming faces (C1, C2, C3, C4 , C3, C2, C1), against the twelve wall-forming faces (62) of the male (15).

The bending of the rims (R) with respect to the side walls (PL), by the first forming members (64a) and/or the second forming members (64b) in cooperation with the forming faces (58, 59) of flanges.

Firstly, with the introduction of the core (15) in the cavity (52) and the displacement of the forming stops (56) with faces (58) facing each other along the linear direction (X), two mutually opposite rims (R) are bent by part of the first members forming members (64a), and/or optionally by the second forming members (64b), in cooperation with the rim-forming faces (58) of these forming stops (56).

Once these two opposite rims (R) have been folded, with the displacement of the shaping stops (56) with faces (59) and facing each other along the linear direction (Y), the other two mutually opposite rims (R) are folded by the first forming members (64a) of the core (15) in cooperation with the rim-forming faces (59) of these forming stops (56).

Subsequent to the bending of said rims (R) by the first forming members (64a) and/or the second forming members (64b) in cooperation with the rim-forming faces (58, 59), the actuators (66) move the second forming members (64b) to carry out at least one pressing of some overlapping portions of some end zones (A) of the rims (R) coinciding with the corner zones of the box (B).

Once the box (B) is shaped, the four shaping stops (56) are moved to their retracted positions, allowing the expulsion of a box with said cantilevered rims (R), through the outlet mouth (55). ) of the cavity (52).

The scope of the present invention is defined by the following claims.

Claims (20)

1. Machine (100) for forming boxes (B) from plates (P), said boxes (B) having a bottom portion (F) surrounded by four side walls (PL) facing two by two that delimit four corner areas of the box, and rims (R) located on the upper part of the side walls (PL) surrounding the box (B) and projecting in cantilever towards the outside of the box (B) providing a support for a closure sheet; wherein the machine (100) comprises: a mold (50) defined by a cavity (52) with an input mouth (54) of a plate (P), an output mouth (55) of a box (B) formed, facing and aligned with the input mouth , and the cavity (52) being delimited at least partially by box-forming elements that include a plurality of rim-forming faces (58, 59) arranged around the cavity (52) and movable between a retracted position, which allows the ejection of a box with said cantilevered rims (R), through the cavity (52), and a stop position in which the rim-forming faces (58, 59) at least partially obstruct the perimeter of the cavity ( 52) to form the rims (R); a male (15) provided with a bottom-forming face (65) surrounded by four wall-forming faces (62) facing each other two by two that delimit four corner-forming areas of the machine (100), the male (15) being movable in a linear direction (Z) by a male actuator (10) in opposite directions of introduction and extraction of the cavity (52) of the mold (50), the bottom-forming face (65) being configured to press the bottom portion (F) of a plate (P) positioned in the entry mouth (54) introducing it into the cavity (52) during the insertion movement of the core (15), which has an associated rim-forming device configured to cooperate in the bending the rims (R) with respect to the side walls (PL) towards the outside of the boxes (B) and/or pressing them against the box-forming elements (B); the machine (100) being characterized because : the rim-forming device comprises at least two mutually facing first forming members (64a), associated with two opposite wall-forming faces (62), each of said forming members (64a) protruding from a corresponding wall-forming face (62) towards the outside of the core (15) and overlapping the rim-forming faces (58, 59), when these rim-forming faces (58, 59) are in the stop position; Y in that the machine (100) comprises a plurality of second forming members (64b), actuation in corners arranged around the male (15), each one arranged in a corner-forming area of the machine (100), the second forming members (64b) being movable, by actuators (66) of second forming members (64b ), to carry out at least one pressing of some overlapping portions of some end zones (A) of the rims (R) coinciding with the corner zones of the box (B), after the bending of said rims (R) by part of the first forming members (64a) and/or the second forming members (64b) in cooperation with the rim-forming faces (58, 59). 2. Machine (100) according to claim 1, wherein the plurality of second forming members (64b) is associated with the core (15) superimposed on the wall-forming faces (62). 3. Machine (100) according to claim 1, wherein the plurality of second forming members (64b) are associated with the mold (50) at least partially delimiting the cavity (52). 4. Machine (100) according to claim 3, wherein the plurality of second forming members (64b) are integrated in faces (59) of the plurality of forming faces (58, 59), and wherein the rim-forming device further comprises a plurality of third forming members (64c) arranged around the core (15), each one arranged in correspondence with a corner-forming area of the machine (100), overlapping the wall-forming faces (62), being the plurality of third forming members (64c) configured to cooperate with a pressing by the second forming members (64b). 5. Machine (100) according to any of the preceding claims, wherein the plurality of second forming members (64b) comprises four corner acting second forming members (64b), each of said second forming members (64b) being individually movable , independently of each other, and each second corner actuating forming member (64b) is configured to individually press a respective corner area of the rims (R) of the box (B). 6. Machine (100) according to claim 5, wherein the actuators (66) of second forming members (64b) comprise four actuators (66), and each of the four second forming members (64b) is movable by a respective actuator. (66). 7. - Machine (100) according to any of claims 1 to 5, wherein the second forming members (64b) are movable independently in pairs, and each pair of second forming members (64b) is movable by means of a respective actuator (66) of second forming members (64b) connected to a respective pair of second forming members (64b). 8. - Machine (100) according to any of the preceding claims, wherein the second forming members (64b) are movable independently of the displacement of the male (15) according to the linear direction (Z). 9. Machine (100) according to any of the preceding claims, wherein the at least two first forming members (64a) are in turn movable with respect to the wall-forming faces (62) of the core (15), regardless of the displacement of the male (15) according to the linear direction (Z), by means of at least one position regulator (80), when the male (15) is stationary. Machine (100) according to claim 9, wherein each forming member (64a) is individually positionable, relative to the core (15), by means of a respective position regulator (80). 11. Machine (100) according to any of claims 9 or 10, wherein said position regulator (80) comprises at least one first threaded rod (71) with a threaded edge (71b), the threaded rod (71) being mounted on a rear part (63) of the male (15), opposite to a front part (61) of the male (15) where the bottom-forming face of the male (15) is located, and said position regulator (80) further comprises portion (71a) adapted to rotate the first threaded rod (71), preferably by means of a tool and/or manually, said rotation causing a linear displacement, parallel to the linear direction (Z), of at least one forming member (64a ) with respect to the wall-forming faces (62) of the male (15). 12. Machine (100) according to any of the preceding claims, wherein the box-forming elements (B) further include at least four lateral wall-forming faces (C1, C4), movable between respective retracted positions adjacent to the cavity (52 ) and respective stop positions towards the inside of the cavity (52), arranged around the cavity (52), state the at least four sides forming faces (C1, C4) in their stop positions configured to press a part outside of the box (B) against the four wall-forming faces (62) of the core (15), towards the inside of the cavity (52), during said pressing of the plurality of second forming members (64b). 13. Machine (100) according to claim 12, wherein the four lateral wall-forming faces (C1, C4) have inclinations with respect to the linear direction (Z) complementary to the inclinations of the wall-forming faces (62) of the male (15). 14. Machine (100) according to any one of claims 12 or 13, wherein the side wall-forming faces (C1, C4) are additionally integrated into the plurality of box-forming elements that include a plurality of faces (58, 59 ) flange formers. 15. Machine (100) according to any of the preceding claims, wherein the box-forming elements (B) also include benders to bend side walls (PL) with respect to the bottom portion (F) of the plate (P ), integrated in the plurality of box-forming elements that include a plurality of rim-forming faces (58, 59). 16. Machine (100) according to claims 12 and 15, wherein the doublers are the at least four faces that form the side walls (C1, C4). 17. Machine (100) according to claims 12 and 15, wherein the benders are bending edges (AH) integrated in the box-forming elements that include a plurality of rim-forming faces (58, 59). 18. Machine (100) according to any of claims 1 to 16, wherein bending edges (AH) are integrated in at least two of said mutually opposite box-forming elements, the bending edges (AH) being configured to bend at least two mutually opposite rims (R) with respect to their respective side walls (PL). 19. Machine (100) according to any of the preceding claims, wherein the box-forming elements (B) also include a plurality of benders (51, 53) to bend side walls (PL) with respect to the bottom (F) of the box. iron (P). 20. Machine (100) according to any of the preceding claims, wherein the second forming members (64b) are movable by means of the plurality of actuators (66), between respective waiting positions and respective working positions projecting with respect to a periphery of the male (15) defined by the wall-forming faces (62) thereof, each second forming member (64b) comprising a forming member configured to finish bending or bending at least one rim (R) outwardly relative to the side walls ( PL) and to press this at least one shoulder (R) into the protruding working position.