ES2397258T3 - Packaging machine, in particular for fruits and vegetables - Google Patents

Abstract

Forming machine (100) for the volume development of a container obtained from an opanel sheet (1) of non-foldable material, said container having a flat configuration (21) and a return configuration (27), when the package is in the volume configuration it comprises a lower part (20), a plurality of side walls (15, 16) and a plurality of end wings (17) connected with at least one side wall (16), said package also comprising: - at least one flexible film (2, 3, 4) on the outer side of the panel (1), which is designed to hold the different parts together after successive operations and - a plurality of channels (5, 6, 8) on the inner side of the panel, which coincide with the fold lines that separate the lower part (20) of the side walls (15, 16) and the extreme wings (17) of the side walls (16), - at least one of the channels (5, 6) consists of a first edge (22) on the side wall (15, 1 6), a second edge (24; 24B) at the bottom (20) and a base (23; 23B) disposed between the two edges above said flexible film (2, 4), in which the distance between said two edges (22, 24; 24B) of the channel that the side wall (15, 16) rests on the inner side of the bottom (20) of the container during the development of the volume of the package, said forming machine (100) comprising: - a forming spindle (25) that it is pressed on the lower part (20) of the container, and - at least one guide (26) supporting at least one side wall (15, 16) of the container, characterized in that said guide (26) comprises a pivot axis ( 27) to rotate in the corner of the channel (5, 6) identified by the intersection of the base (23; 23B) with the second edge (24; 24B) of the channel, such that it makes the corresponding side wall (15, 16 ) of the container rotate to arrange it in said lower part (20).

Description

Packaging machine, in particular for fruits and vegetables

Technical field

The present invention relates to the field of containers manufactured with a sheet or panel of rigid, non-foldable material, with high resistance to vertical compression. Said packaging is suitable for any use, and in particular, includes, transport, store and distribute products of all types, especially food and / or fruits and vegetables that, due to their fragility, need adequate protection both during mass storage and during transport from production centers to destinations, even in refrigerated environments.

Recently, the package obtained from a panel of rigid wood fiber material has been proposed.

For example, patent FR2818616 describes a package formed from a wood fiber panel fully coated with a sheet of paper, pre-printed cardboard on the outer side, and eventually reinforced with a plastic film. In some areas of the sheet panel, triangular V-shaped milled parts are obtained, which are limited to the thickness of the panel without the need to cut the thickness of the coating, which acts as a hinge. In such a way that the milled pieces are the folding points of the panel to form the container.

Despite the fact that the package is obtained with a rigid panel, it is inadequate both in terms of resistance to vertical compression and for practical stacking.

Figure 11 shows three packages according to the prior art, in stacked position. The reference numbers (q3 and q4) are used to indicate the load on the bottom and the reference numbers (R3 and R4) are used to indicate the load on the side wall. In fact, after obtaining the triangular milled V-shaped parts, it is easy to understand that, when several containers loaded with goods are stacked, as shown in Figure 11A, the load transmission during stacking passes through the hinge represented by the movie. In the specific case, the weight is mainly reflected in the film and / or paper.

To limit such a problem, the additional reinforcement film is applied to the cardboard. In addition, in order to be easily stackable, the heads of the containers must be tilted inward, and this reduces the volume of containment. Although triangular milled parts allow the lifting of the side walls easily during shaping, using the lining as a hinge, the triangular shape carries most of the weight of the previous containers in the lining (Figures 11 and 11A), sometimes causing breakage. and the consequent overturn of the entire battery.

In consideration of the fact that the lining covers the entire outer side of the package, it seems clear that the hinge reinforcement implies an additional cost increase that makes such a container not competitive.

EP 1325799 discloses an additional type of package, which comprises a container obtained from a single panel of wood fiber or composite material. Some notches are obtained in the areas of the panel that act as folding for the container. Next, the rubber is injected into said notches by means of an injection press and a suitable triangular V-shaped mold. In this way, when the mold is removed, after cooling, hinges with V-shaped grooves are created, which allow the various parts of the package to be folded and create the volume setting.

In addition, this package is affected by numerous problems. In the first place, the manufacturing process is not simple, on the contrary it is complicated and expensive. In fact, it provides the use of special equipment with high energy consumption. The injection process must be carried out at high pressure and high temperature and requires a very high force. Another drawback is that it is a slow process, due to the time required to inject the rubber and cool it. For the reasons mentioned above, this type of packaging is also not competitive.

The problems mentioned above are solved by the package described in document FR 1 482 977, which discloses a package comprising a groove with rectangular section disposed between a bottom and a side wall of the container. A slot of this type is used as a folding line to allow the side wall to rest on the inner side of the bottom of the container, when the volume setting is created. However, such packaging is done manually, with a long production time and high costs.

Document US2009 / 0170678 discloses a forming machine for the realization of cardboard boxes. Said forming machine provides fixed arcuate guides and a forming mandrel that moves linearly to push a central perforated cardboard panel, thereby folding the side walls by contact with the fixed arched guides. It should be considered that perforated cardboard is provided with fold lines along which the walls are folded. Instead, such a forming machine cannot be used to form a container made of rigid panels with notched channels, as described in the previous document FR 1 482 977, since it would break said panels.

Until now, a valid process has not been conceived to replace the traditional packages composed of a series of strips and angles of wood that are mutually sewn, although their production process is long, complicated and expensive as mentioned above.

It should be noted that food and / or fruit and vegetable products are especially fragile, and therefore require a small package, high mechanical strength, even in humid environments, and that is able to ensure the good preservation of products in time and during transport from the places of production to the places of destination.

Taking into account the large quantities of such products that are consumed every day, a large number of such packages is necessary.

Undoubtedly, the panels of sheets of non-folding material (wood, wood fiber, plywood, MDF, etc.) have a greater mechanical strength, which is not comparable with folding materials, such as cardboard

or similar. The difficulty in using non-folding material in a container made of a sheet panel, without losing the characteristics of strength, robustness and rigidity, lies in the realization of a fold that does not affect these characteristics.

One of the purposes of the present invention is to reveal a machine for the production of a new container for all uses, in particular for containing and transporting food and / or fruit and vegetable products, which combines the typical advantages of the package obtained from from rigid materials (first, the conditions of solidity, stability and hygiene), with an industrial production process, which is cheap, and typically flexible materials.

This purpose is achieved with the machine of the invention.

The forming machine of the invention comprises:

! a forming spindle that is pressed on the bottom of the container, and

! at least one guide that supports at least one side wall of the container. Said guide comprises a pivot axis to rotate in the corner of the channel identified by the intersection of the base with the second edge of the channel, such that it causes the corresponding side wall of the container to rotate in order to arrange it in said lower part .

These and other features of the present invention will be apparent from the following description, with reference to the accompanying drawings, which show some preferred embodiments of the invention only by way of illustration and not in a limiting sense, in which:

Figure 1 is a plan view of the outer side of a flat panel on which the strips of film are applied to make a container of the known type. Figure 2 is a plan view of the panel of Figure 1, showing the parts affected by the operation of shear. Figure 3 is a plan view of the panel of Figure 2 after shearing and cleaning. Figure 4 is a plan view of the panel of Figure 3 after the realization of the folding channels in the transverse and longitudinal direction. Figure 5 is a cross-sectional view of Figure 3 along the section plane V-V '. Figure 6 is a cross-sectional view of Figure 4 along the section plane VI-VI '. Figure 6A is the same view as Figure 6, except that it shows a different version of the channel obtained in correspondence with the pasted film. Figure 7 is a cross-sectional view of the package along the section plane VII-VII 'of Figure 4, wherein the package is spread in a forming machine of the invention. Figures 7A and 7B are the same views as Figure 7, which show two successive steps to create the volume of the container of the invention. Figure 8 is a perspective view of the container in volume configuration. Figure 8A is a longitudinal sectional view of the container of Figure 8. Figure 8B is an enlarged view of the detail contained in circle B of Figure 8A. Figure 8C is a cross-sectional view of the container of Figure 8. Figure 8D is an enlarged view of the detail contained in circle D of Figure 8C. Figure 9 is a perspective view of the container of Figure 8 in stacked position with mutual adjustment. Figure 10 is a partially sectioned side view of the container of Figure 9 in stacked position. Figure 10A is an enlarged view of a detail of Figure 10. Figure 11 is a partially sectioned side view of three stacked containers according to the technique above (patent FR2818616). Figure 11A is an enlarged view of a detail of Figure 11. Figure 12 is a plan view like Figure 2, except that it shows a different version of the

container. Figure 13 is a perspective view like Figure 8, showing the volume development of the packaging of Figure 12.

Referring to Figures 1 to 9, the manufacturing process of a package is described. Figure 8 shows the package in the volume configuration, which is generally known as the reference number (27). Said container (27) comprises a lower part (20), two long or longitudinal side walls (15) and two short or transverse side walls (16) that rise from the lower part (20). Each short side wall (16) is connected with two end wings (17) that fold at right angles to rest on the inner side of the bottom (20), touching the inner side of the long side walls (15).

Optionally, two angular wings (18) extend horizontally at the upper edge of the lateral sides

(16) short. Two connecting wings (19) extend vertically at the ends of the angular wings (18).

With reference to Figure 1, the package (27) is obtained from a sheet or panel (1) that is basically rectangular in shape. The panel (1) is made of non-folding material, such as wood, wood fiber, plywood, MDF, composite material, and the like. The dimensions of the panel (1) are at least equal to the development of the package that has to be made flat. The thickness of the panel (1) is approximately 3.2 mm.

From a stack of panels (1), the production process provides any means capable of taking and transferring in sequence one panel at a time, in order to carry out the different machining operations.

A first operation consists in the application of a film (2, 3 and 4) on the outer side of the panel (1), that is, the side facing outwards. The film is glued with any suitable means, for example, a wrapping machine or an automatic plastic coating machine. Preferably, the flexible film (2, 3, 4) is used only in the areas where the various parts of the package should be folded, it being sufficient to keep the various parts of the package together for material-saving purposes. For different reasons known to those skilled in the art, said film can be extended to the entire surface of the panel.

According to a version not shown in the accompanying drawings, it is possible to apply an adhesive or non-adhesive film, at least sufficient to cover all the areas that will be affected by the folds. Said film may be of any suitable flexible material, such as tape, paper, cardboard, plastic film, etc. If the film is not adhesive, any suitable means of the known type is used to apply glue on the film and / or sheet panel, so that it sticks.

Referring to Figure 1, four transverse film strips (3, 2) are applied on the panel (1) in parallel position, in order to define the short side walls (16) and the horizontal horizontal wings (18). Next, two longitudinal strips of film (4) are applied on the panel (1), which extends over the entire length of the panel, near the longitudinal edges of the panel such that they overlap the ends of the transverse strips (2 , 3). The longitudinal strips (4) define the two long side walls (15).

Referring to Figure 2, the following operation consists of a shear operation of the panel, which can be carried out with any suitable cutting means of known type, for example, by means of shears, rotating or flat press, and the like. With this operation, the panel (1) is provided with multiple notches (10, 10B, 10C, 10D) that cross the entire thickness of the panel (1), including the bonded film (2, 3, 4), limited to the areas in which the film coincides with the shear.

The notches (10) are obtained in correspondence with the corners of the panel and extend to the side wall (16). The notches (10D) are obtained in correspondence with the transverse strips (2) and extend from the edge of the panel to the side wall (16). The notches (10B) are obtained at the short edges of the panel. The notches (10C) are obtained in correspondence with the central part of the strips (2). During this operation, a plurality of notches (10A) is obtained in correspondence with the bottom panel and with the side walls of the container.

Referring to Figure 3, the residues of the notches are removed in such a way that, after said operation, the panel (1) is composed only of the useful parts. Consequently, corresponding grooves (13, 12) are obtained in correspondence with the notches (10, 10D).

The width of the grooves (12, 13) is approximately twice the thickness of the panel (1) and its depth reaches the short side wall (16). If the end of the grooves (12, 13) has a semicircle shape, it can invade the short side wall (16). The grooves (12) separate the long side walls (15) from the end wings (17). Slots

(13) separate the end wings (17) from the connection wings (19).

In correspondence with the notches (10B), projections (14) are obtained that extend vertically from the short side walls (Figure 8). From the notches (10C) the windows (11) are obtained, which are located at the base of the short side walls (16) (Figure 8).

The windows (11) have a length, for example, of 70 to 90 mm and a width of about 25 to 35 mm. The projections (14) of the short side walls (16) have a slightly shorter length than the windows 5 (11) and a height or projection of approximately 10 to 15 mm.

In this way, when the package (27) is stacked, the projections (14) are inserted into the windows (11) of the previous package (Figure 9), with both the centering function and the movement prevention function side of a container with respect to the other. Said windows (11) may have a greater width than the

10 projections (14) on the side of the short side walls (16), in order to act as holding handles in addition to air outlets for the goods.

From the notches (10A), the holes (50) are obtained and used to ensure the perspiration of the goods contained in the package.

Referring to Figure 4, the process also includes a milling operation on the inner side of the panel (1), that is, on the opposite side, the one on which the strips (2, 3, 4) are applied . Longitudinal milling is performed to obtain longitudinal channels (6, 8, 9) and cross milling to obtain transverse channels (5, 7). The longitudinal channel (8) is three-sided with respect to the other longitudinal channels (6 and 9) for a value that

20 corresponds to approximately the thickness of the panel (1).

The channel (5) separates the central rectangle (20) that is the bottom of the container, from the short side walls (16) of the container

25 The channel (6) separates the lower part (20) of the container from the long side walls (15) of the container.

The channel (8) separates the short side walls (16) from the end wings (17) which are also the connection areas for the volume development of the container.

30 The channel (9) separates the angular wings (18), which are a valid reinforcement angle of the container and make stacking easier, starting from the connecting wings (19).

The channel (7) separates the short side walls (16) from the angular wings (18).

35 All of said channels (5-9) coincide with the folding lines and can be achieved with any suitable cutting tool, such as a milling cutter or disc or the like.

Figure 4 shows a complete package (21) in a flat configuration.

40 Figure 5 shows the section of the panel (1) in correspondence with the film strip (2) before milling.

Figure 6 shows the channel (5) in correspondence with the strip (2) that separates the lower part (20) from the side wall

(16) short. As shown in Figure 6, the width and depth of the channel (5) are basically the same. Said channel depth affects most of the thickness of the panel (1), without reaching the glued film (2).

Although Figure 6 only shows the channel (5), all other channels (7, 6, 8, 9) can have the same configuration as the channel (5).

Therefore, each channel has a base (23), a first lateral edge (22) in the wall (16) that has to be rotated and a second lateral edge (24) in the lower part (20) adapted to support the wall that is spinning.

Between the base (23) of the channel and the glued film (2), a portion of material (23 ') of the panel extends, which is advantageously of a thickness just sufficient so that the panel (1) does not fold in correspondence with these channels, without exerting a force. This allows the handling and / or transport of the container (21) in the flat configuration to another place, for the development of volume, without special care.

Said portion of material (23 ') between the glued film and the base (23) of the channel will be determined by the type and thickness of the panel used.

For example, in a panel of wood fiber material with a thickness of 3.2 mm, the material portion (23 ')

60 between the flat base (23) of the channel and the bonded film (2, 3, 4) can be approximately 0.3 to 1 mm with the adhesive film having a thickness of approximately 0.02 to 0.05 mm.

The edge (22) of the short side wall (16) to be rotated has a geometry such that, after the rotation, the short side wall (16) is located on the inner side of the bottom (20) of the container (Figure 8B). The base (23)

65 of the channel is parallel and adjacent to the edge (24) of the bottom (20).

Figure 6A shows a different version in which the material portion (23 ') has a decreasing thickness from the first edge (22) to the second edge (24B). Consequently, the base (23B) of the channel is slightly inclined and the second edge (24B) of the channel forms an angle of approximately 90 ° with respect to the inclined base (23B).

This type of channel can also facilitate folding during volume development and also allows the rotation of the side wall (16) to cut until the first edge (22) of the channel is on the inner side of the lower part (20 ) of the container, while the inclined base (23B) is parallel and adjacent to the second edge (24B) of the channel (5).

In the drawings, the first edge (22) is flat and orthogonal to the surface of the side wall (16). However, the base (23; 23B) of the channel, the edges (22, 24; 24B) and the area of the inner side of the bottom (20) that will be affected by contact with the first edge (22) can have different geometric configurations that are not shown in the drawings. For example, the first edge (22) may have a convex profile and the portion of the inner face of the lower panel that receives the edge (22) may have a concave profile.

The first edge (22) must have one of such geometries that, after the rotation of the short side wall (16), allows the side wall (16) to cut rest on the inner side of the bottom (20) of the container, while the base

(23) of the channel is parallel and adjacent to the edge (24) of the bottom (20).

The geometry of said panel folding channels allows the container of the invention, in volume development, to have a configuration in which both the side walls (15 and 16) and the end wings (17) are located on the inner side from the bottom (20), all contributing to the load transmission during stacking. Figure 10 shows three stacked containers, using numbers (q1, q2) to indicate the loads in the lower parts (20) of the first two containers and the reference numbers (R1 and R2) to indicate the loads in the side walls ( 16) of the first two containers.

As shown in Figure 10A, such a container is capable of ensuring the transmission of cargo during stacking, practically imperceptibly affecting the glued film (2) that is only responsible for keeping different parts together.

Through the realization of said channels, the process advantageously allows obtaining all the necessary components so that the panel (1) is a high resistance container (21) in the flat configuration.

The realization of the flat configuration container (21) (Figure 4) for the development of the configuration (27) (Figure 8) can also be carried out at the place of use, with considerable economic convenience during transport and storage .

Referring to Figures 7, 7A and 7B, the configuration of the volume of the container can be achieved with an automatic forming machine according to the invention, which is generally indicated by the reference number (100).

The forming machine (100) comprises a forming spindle (25) and a plurality of forming guides (26) composed of flat plates that rotate around corresponding pivot axes (27). The rotation of the forming guides (26) is such to fold the short side walls (16) of the container in correspondence with the corner between the base (23) of the channel and the edge (24) of the lower part (20). The forming spindle (25) is placed in the lower part (20) of the container and the short side walls (16) are located in the forming guides (26). When the spindle (25) is pushed down vertically, the shaping guides (26) are automatically rotated, allowing the rotation of the short side walls (16) that are arranged at the bottom

(20) (Figure 7B).

The shaping guides (26) make a 90º turn around the pivot axes (27).

The position of the pivot axes (27) has been studied as a function of the thickness of the guides (26) so that, when the guide (26) is rotated vertically, its surface comes into contact with the edge (24 ) of the lower part (20), in which the adhesive strip and the base material portion are interposed between the edge and the guide, thus ensuring the perfect vertical position of the short side wall (16). The shaping guides (26) are adapted to support the short side walls (16) during folding in the corner of the channel identified by the intersection of the base (23) with the edge (24).

With the 90 ° rotation the shaping guides (26) are also adapted to position said side walls

(16) cut in perpendicular position at the bottom (20), the base (23) of the channel in an adjacent position parallel to the edge (24), and the edge (22) on the inner side of the bottom (20) of the container.

Figures 8, 8A, 8B, 8C and 8D show the development of the volume of the container and the relevant fixation through the wings (17, 19) and the long side walls (15) in an automatic machine.

While the container (21) (Figure 4) in the flat configuration is transferred to the forming station, adhesive, such as fast hardening glue, is applied to the affected areas. The conformation begins by folding the extreme wings (17) at approximately 90 °, then the short side walls (16) are folded at 90 ° to be arranged perpendicularly with the first edge (22) of the channel (5), which rests on the inner side of the bottom (20) of the container. At the same time, also the extreme wings (17) are arranged perpendicularly on the inner side of the lower part (20) and then the long side walls (15) fold 90 °, so that they are perpendicular to the bottom (20), with the edge (22) of the channel (6) on the inner side of the bottom (20) of the container.

To ensure greater stability and easier stacking, the container may be provided with angular wings.

(18) which are then folded at 90 ° to be arranged horizontally on the short side walls (16) and the extreme wings (17); finally, the fixing wings (19) are folded at 90 ° to be arranged against the extreme wings (17) for fixing.

After a slight pressure in correspondence with the areas in which glue has been applied, the container is ejected from the forming machine in a volume setting, therefore being ready for either stacking or use.

Obviously, the end wings (17) can be fixed to the long side walls (15) in the contact area with any suitable means, such as glue, seam, riveting and the like and; Furthermore, when the package is provided with angular wings (18), the wings (19) can also be fixed to the extreme wings (17) in the contact area with any suitable means, such as glue, seam, riveting and the like.

Figures 12 and 13 show an embodiment of simplification of the package of the invention, in which the same elements are indicated with the same reference numbers, omitting its detailed description.

In said embodiment, the angular wings (18), the fixing wings (19), without glued film (3) and the transverse channel (7) have been removed. As shown in Figure 12, the notches (10, 10B) have been replaced with notches (10 ') in correspondence with the short edges of the panel (1) and the notches (10D) have been replaced with straight notches (10E) .

To make stacking easier and reinforce the package, additional elements, also of different material, can be provided that have the same functions as the horizontal wings (18) and the connecting wings (19). Or, still with reference to the aforementioned container, to make stacking easier, the short side walls (16) may be inclined slightly, for example, approximately 2 to 5 degrees, towards the inside of the container, together with the end wings. (17) through the inclination of the notches (10E) (Figure 13).

In this way, the grooves obtained from the notches (10E) can be made conically with an opening equidistant to the opening of said grooves. The sides of the end wings (17) corresponding to the notches (10E, 10 ') must have an identical inclination, so that once the package is in the volume configuration, these same sides are parallel to the part lower (20). The same slight inclination can be given to the edge (22) (Figure 6A) of the channel (5) that is located on the inner side of the bottom (20) of the package. In such a case, the openings (11) must move slightly, for example, approximately 2 to 10 mm, towards the center of the bottom (20) to receive the projections (14) during stacking.

According to an additional version not shown in the accompanying drawings, instead of making the channel (6) and / or the folding channel (8) with the geometry shown in Figures 6 and / or 6A, it can be make a triangular shaped channel, considering that most of the load during stacking is transmitted through the short side walls (16) and the extreme wings (17), as shown in Figures 10 and 10A.

According to an additional version not shown in the drawings, instead of dividing, the angular wings (18) could be joined and configured as a pair using the 10B material (Figure 2) of the same panel (1) with a variation in the shear mold, keeping the projections (14).

According to an additional version not shown in the attached drawings, the end wings (17) may be provided with one or more folding channels parallel to the same channel (8), being suitably provided with a film stuck and obtained in such a way that the end wing (17) is partially arranged from side to side with the side wall (15) long and partially from side to side with the side wall (16) short, thereby forming an angular reinforcement that is then fixed to the walls lateral with any suitable means.

Also the extreme wing (17) can be extended to perform the same function as the projections (14); in which case, the openings must be obtained in the lower part (20) in correspondence with the extension of the wings (17) to receive them and collaborate with them during the stacking, performing the function of the openings (11).

It seems clear that the process described here is especially simple and cheap, since it does not require any special equipment, there is no high energy consumption, no specialized labor and because it allows to obtain a container of a panel (1) of material Non-folding (wood, wood fiber, plywood, MDF, composite material, etc.) that is especially resistant to compression caused by vertical loads during stacking.

In addition, it seems clear that the package of the invention is the first to be especially suitable and convenient to contain products of any kind, especially food and / or fruits and vegetables that, due to their fragility, need adequate protection both in storage massive in cold stores such as during transportation from the production centers to the destinations. After the product contained in the package has been unloaded, the package is brought back to the flat configuration to reduce the volume,

10 reused or recycled whenever possible. The package described herein can be used in the field of packaging for all uses.

Claims (4)

1. Forming machine (100) for the volume development of a container obtained from a sheet or panel (1) of non-folding material, said container having a flat configuration (21) and a volume configuration (27), when the package is in the volume configuration it comprises a lower part (20), a plurality of side walls (15, 16) and a plurality of end wings (17) connected with at least one side wall (16), said said also comprising container:

-

 at least one flexible film (2, 3, 4) on the outer side of the panel (1), which is designed to hold the different parts together after successive operations and

-

 a plurality of channels (5, 6, 8) on the inner side of the panel, which coincide with the fold lines that separate the lower part (20) from the side walls (15, 16) and the end wings (17) of the side walls (16), -at least one of the channels (5, 6) is composed of a first edge (22) in the side wall (15, 16), a second edge (24; 24B) in the lower part (20) and a base (23; 23B) disposed between the two edges above said flexible film (2, 4), in which the distance between said two edges (22, 24; 24B) of the channel is such that the side wall (15, 16) rests on the inner side of the bottom (20) of the container during the development of the volume of the container,

said forming machine (100) comprising:

-

a forming spindle (25) that is pressed on the bottom (20) of the container, and

-

at least one guide (26) supporting at least one side wall (15, 16) of the package,

 characterized by said guide (26) comprises a pivot axis (27) to rotate in the corner of the channel (5, 6) identified by the intersection of the base (23; 23B) with the second edge (24; 24B) of the channel, of such that it causes the corresponding side wall (15, 16) of the container to rotate to arrange it in said lower part (20).

2.

Forming machine according to claim 1, characterized in that said guides (26) of the machine are flat.

3.

 Forming machine according to claim 1 or 2, characterized in that said guides (26) are arranged to rotate 90 °, moving from a horizontal position to a vertical position and vice versa.

Four.

Forming machine according to any one of the preceding claims, characterized in that said pivot axes (27) are separated from the edge (24) of the bottom (20) of the package, according to the thickness of the guides (26 ) so that when the guide (26) is rotated in an upright position, the surface of the guide stops against the edge (24) of the bottom (20), in which the flexible film (2, 3, 4) and the base material (23; 23B) are interposed between the edge (24) and the guide (26), ensuring a perfect vertical arrangement of the side wall (16) of the container.