WO2019122491A1

WO2019122491A1 - Method and facility for constructing large polygonal containers and thus obtained large polygonal container

Info

Publication number: WO2019122491A1
Application number: PCT/ES2018/070829
Authority: WO
Inventors: Telesforo Gonzalez Olmos
Original assignee: Telesforo González Maquinaria, Slu
Priority date: 2017-12-23
Filing date: 2018-12-21
Publication date: 2019-06-27
Also published as: ES2717723A1; ES1215634U; ES1215634Y; ES2717723B2

Abstract

A method for constructing large polygonal containers involves providing a first polygonal tubular body (1), providing a second polygonal tubular body (2) capable of fitting snugly inside the first polygonal tubular body, aligning the first polygonal tubular body with the second polygonal tubular body (2), applying glue lines (G2) to the outside of the second polygonal tubular body and/or to the inside (6b) of the first polygonal tubular body, moving the first polygonal tubular body and the second polygonal tubular body (2) in relation to each other until a snug fitting is obtained, providing a base (3) and finally joining a lower end portion of the outside (6a) of the first polygonal tubular body to the inside of the base (5b) of the polygonal bottom wall (5) of the base by glue lines (C1), forming a large polygonal container.

Description

DESCRIPTION

METHOD AND INSTALLATION FOR THE FORMATION OF POLYGONAL DRUMS AND

POLYGONAL BOTTLE OBTAINED

TECHNICAL SECTOR

The present invention presents a method for the formation of polygonal drums, It also presents an installation for the formation of said polygonal drums. It also presents the polygonal drum obtained with said method and / or installation. Throughout this description, the term "laminar material" is used to designate corrugated cardboard sheet, corrugated plastic sheet, compact cardboard sheet, compact plastic sheet , and similar.

BACKGROUND OF THE INVENTION The polygonal drums of laminar material are used in an extended manner to contain bulk and / or bulky products. Examples of the wide range of products are: products of the horticultural and food industry, products of the chemical and pharmaceutical industry, products industrial in general, products of the automation industry, etc. Typically said polygonal drums, together with a polygonal base, have a capacity comprised between 200 and 1 250 liters. These high-capacity polygonal drums, when they mainly store bulk products, are called "bulk-boxes". High-capacity polygonal drums containing a food product inside an aseptic bag are known as polygonal drum "bag-iñ-hoxT The optimal way to resist these efforts is through a cylindrical drum: which evenly distributes these stresses by subjecting the wall of the drum to a pure traction effort as a ring. However, the cylindrical shape is not very efficient when it comes to storing a large number of drums, since it generates many inter-spaces and complicates the resistant connection of the cylindrical tubular body with a base body if it is desired that said base body be able to be obtained from cutting and bending operations of a flat corrugated cardboard.

The solution to these problems is the use of a polygonal geometric shape similar to the cylinder, in this case we propose a polygonal tubular body with an even number of faces greater than four, as reflected in the aforementioned background. In the state of the art, to form a polygonal drum of laminar material with a number of side walls equal to and greater than four, it is necessary to form a polygonal base body from a flat base panel, and assemble a first tubular body. polygonal with two mouths opposite said base body or said flat base panel.

The documents WO2016198708A1 and ES2593823A1 disclose an installation for the production of hexagonal or octagonal base bodies, from a flat base panel,

US948897282 discloses a method and apparatus for automatically forming a polygonal drum of sheet material from a flat base panel and a first polygonal tubular body of octagonal cross section.

The first polygonal tubular bodies endowed with multiple flat faces between corner areas are fed in a flattened arrangement by making a folds 180 on two of the opposite corner areas, and then expanding them obtaining a first expanded polygonal tubular body, to which a base body to a lower end portion.

It is thus obtained a polygonal drum where the first polygonal tubular body has adopted octagon prismatic form! and the flat base panel has been adhesively bonded to! extrados of the first polygonal tubular body. A drawback of US9486972B2 is that the polygonal drum obtained, by means of said first polygonal tubular body and said base body, is not suitable for containing products with relatively high densities, for example, densities equal to or above the density of the water, due to to have a structure resistance! deficient, especially at its base, being the compression and expansion resistance of the first polygonal tubular body and of! resulting polygonal drum very limited.

The products contained in these polygonal drums produce expansion forces on the walls of the first polygonal tubular body due to its intrados that deform it, detach the flaps of the base body adhered to the extrados of the first polygonal tubular body. Therefore, the polygonal drum tends to open at the bottom. In a stacked situation, in many occasions the compressive strength of a single body is not enough for the weight of the polygon drum! supported on your part higher.

A solution to the polygonal barrels of a single body obtained with the method and apparatus cié! US9486972B2 and formed by corrugated cardboard can consist, for example, of increasing the resistance of! body using a cardboard with a greater number of leaves in its cross section. That is, to pass for example a five-sided double-sided corrugated cardboard comprising three smooth sheets in which two corrugated sheets are interleaved, to a corrugated cardboard of nine sheets comprising five flat sheets in which four corrugated sheets are interleaved.

However, said solution has the disadvantage that it would involve the production of a first polygonal tubular body of special specifications depending on the weight and characteristics of the product to be contained;

In the case of corrugated board, a corrugated board factory should dedicate whole lines of wave installations to produce said first polygonal tubular bodies of specific specifications. The undulating installations would require special modules and accessories, which should be installed and / or adjusted depending on the product to be contained. This decreases the production flexibility of the corrugated cardboard factory, produces production stops due to installation adjustment, requires a larger surface area, and involves a relatively high investment in machinery and installations. Document ES1, 83958U discloses an apparatus for the production of reinforced polygonal drums from the flat base pieces of document P201600665, In the document ES1163958U the apparatus deploys a first polygonal tubular body ioiciaimanie flat and with two opposite mouthpieces at its ends, and folds and joins the base body on it extrados of the first polygonal tubular body, obtaining a reinforced polygonal drum.

US8056798B2 discloses a first polygonal tubular body made of double-sided corrugated cardboard with five sheets (three smooth and two corrugated) reinforced by a double-sided triple-walled body of seven sheets (four smooth sheets- and three corrugated sheets) inserted therein . The extrados of the second polygonal tubular body is glued with adhesive ai intrados of the first polygonal tubular body. In this case the first polygonal tubular body is not connected to a base body, but the corrugated cardboard is bent forming a bottom supported on a pallet. The absence of a base body na allows the base of the first polygonal tubular body to be reinforced with a base wall that surrounds it precisely at the base where the radial forces produced by the content stored inside the polygonal tubular body are higher. In order to solve this drawback, this document proposes to wrap the polygonal drum with a polyimic, that is plastic sheet, which zuncha and reinforces the whole drum as a belt. This solution greatly complicates the recycling of the resulting polygon drum, in addition to complicating and making more expensive the logistics related to its manufacture, by requiring different p roveedo s of dif ferences m americas. In the state of art there is no knowledge of a method or apparatus for the formation of polygonal drums with two polygonal tubular bodies with a number of even flat faces, greater than four, with a mouth closed by a base body that generates a perimetrai reinforcement.

Thus, reinforced polygonal drums would contain a greater range of products, ie products with a greater range of densities, specific gravity and characteristics, and could be used in a greater number of industrial sectors. The reinforced bodies would also have the advantage of being independent of the number of flat and corrugated sheets of the cross section of each of the polygonal tubular bodies that form the reinforced drum. Another advantage would be that the polygonal tubular bodies from which the reinforced body is obtained are produced, used and widely known in the packaging sector. Thus, in the production facilities of the polygonal tubular bodies of sheet material comprising the reinforced drum, for example, rolling installations, they did not require specific accessory modules which take advantage of the disadvantages described above.

In the state of the art, there is no knowledge of the existence of a method and apparatus, where said polygonal tubular bodies are mechanically bonded by adhesive and with a reduced consumable production cost.

EXPLANATION OF THE INVENTION According to a first aspect, the present invention concerns the method for the formation of reinforced polygonal drums made of sheet material,

corrugated cardboard.

It will be understood that a drum is a container or container with a closed bottom and with an upper embouchure that gives access to the hollow interior of! container or container. Typically the drums have a constant section and the upper embouchure has (same section as the rest of the drum, allowing a frank access to its interior without esfrangularmenfos or bottlenecks.

The method of forming polygonal drums comprises, in a manner known per se in the industry, the following steps:

i. supplying a first hollow polygonal tubular body constituted of corrugated sheet material and provided with two mouths and a first one endowed with an even number of pineapple faces greater than four defined between corner areas, said first wall defining a first extrados accessible from the exterior. first body, a first intrados accessible from the hollow interior of the first body and a first defined axis in the center of the first hollow polygonal tubular body through the two mouths;

i. supplying a base body provided with a polygon bottom surrounded by a polygonal base wall perpendicular thereto, the polygonal base wall having the same number of sides as the first polygonal tubular body and defining a base extrados accessible from the outside of the body of base an intrados base accessible from within the base body;

iii. joining a lower extreme portion of the first extrados of the first polygonal tubular body to the base intrados of the polygonal base wall of the base body by means of a coffer forming a polygonal drum.

It is thus known to supply the first polygonal tubular body, to provide a base body provided with a polygonal base wall, and to join both bodies with a lower end portion of the first polygonal tubular body inserted within the base body so that the one portion bottom end of the first extrados is in contact with e! base intrados of the base wall of the base body. The application of hatred in any of the two mentioned surfaces that remain in contact allows its adhesion and therefore the formation of a drum

The base wall completely surrounds the lower end portion of the first polygonal tubular body adjacent its lower embouchure, acting as a band that reinforces said lower end portion. This allows to increase the resistance of) the resulting drum in front of expansive forces caused by dense products stored inside the polygonal drum, especially products in the form of liquid, paste, granules, dust or loose elements that behave like a fluid, generating bidrostotable pressure at the base of the polygonal drum

The base body can be supplied already assembled, that is endowed with a polygonal bottom and a base wall perpendicular to said polygonal bottom around it, requiring only the application of glue and the insertion of the lower end portion of the first polygonal tubular body within! same for its assembly.

Alternatively, the step of adding the body and base could include the assembly of the base body from bending and folding operations of parts of a piano base panel obtained from a store of base panels. Typically said base panels are cut by defining the polygonal bottom which is surrounded by sides joined to the edges of the polygonal bottom through bending lines, each side defining, after bending at 90 °, one of the flat faces of the stop. At least part of the sides will also include flaps joined to their lateral edges through fold lines so that, once the sides and flaps are folded, they will be superimposed on adjacent sides giving continuity to the base wall.

Said assembly of! The base body can be produced before its union with the first polygonal tubular body or at the same time said joint is produced by folding and adhering the base wall around the extreme portion of the first extracts of the first polygonal tubular body.

However, the present invention proposes that the proposed method also includes the following steps that are not known in e! state of the art:

a) supplying a second hollow polygonal tubular body made of corrugated sheet material and provided with two mouths and a second wall provided with an equal number of flat faces as the first polygonal tubular body, also defined between corner areas, defining a second extrados accessible from the outside of the second body, a second Intradós accessible from: the hollow interior of the second polygonal tubular body and a second axis defined in the center of the second hollow polygonal tubular body through the two mouthpieces, the cross section being! of the second extrados of a complementary shape and size with the cross section of the first intrados of the first polygonal tubular body suitable for an adjusted coupling between the two;

b) aligning the first axis of the first polygonal tubular body with the second axis of the second polygonal tubular body with the respective mouths facing each other and placing the first intrados of each flat face of the first polygonal tubular body parallel to the second exíradós of each flat face of the second body tubular polygonal;

c) apply glue lines parallel to the first axis and / or the second axis on the second axis of! second body: tubular polygon! and / or on the first intrados of the first polygonal tubular body, applicators of lines of d) perform a relative displacement between the first polygonal tubular body and the second polygonal tubular body in the direction of the first axis or of the second axis, producing the fitted insertion of the second polygonal tubular body within the first polygonal tubular body, with the second exíradós facing, in contact with and adhering to the first intrados, producing a reinforced polygonal tubular body.

Thus, it is proposed to additionally supply a second polygonal tubular body whose second exíradós has a shape and size complementary to the first intrados of the first polygonal tubular body to allow its tight insertion, and to align both polygonal tubular bodies.

Subsequently, it proceeds to apply lines of glue on the first intrados and / or on the second exíradós and to insert the second polygonal tubular body inside the first polygonal tubular body, leaving the second extractó adhered to the first intrados forming a reinforced polygonal tubular body, with an increased resistance capacity.

The tail lines are applied in a direction parallel to the insertion direction of the second polygonal tubular body within! first polygonal tubular body, ie in a direction parallel to the first axis and the second axis ;, which will also be a direction parallel to the folds of the material! laminar defined in the corner areas. This direction of the lines of tail facilitates its application during the insertion, accelerate or the process and simplifying the installation that allows its automatic manufacture. It has also been found that, surprisingly, by applying the tail lines in this direction they act as a lubricant of the insert before hardening occurs, each line of the coffer forming a lubricated rail.

The combination of the polygonal tubular body reinforced with the base body provides a polygonal drum with a resistant capacity much higher than that of other polygonal drums made with laminar material, thus allowing it to be used for new uses until now restricted to plastic or metallic drums. .

Furthermore, the proposed method allows pollgonais tubular bodies made with different types of sheet material to be combined, obtaining as a result a great variety of configurations and resistances starting from a low variety of polygonal tubular bodies.

For example, using only two thicknesses of different corrugated cardboard as the laminar material constituting the first polygonal tubular body and the second polygonal tubular body, for example double-sided corrugated cardboard with three sheets and five sheets, four different tubular body resistances can be obtained polygonal reinforced according to how they are combined, allowing to adjust costs and stock.

Each proposed first body and second polygonal tubular body comprises a wall provided with an even number greater than four of flat faces, for example six or eight, defined between corner areas surrounding a hollow interior and defining a transverse section! polygonal.

Each pineapple face is essentially rectangular and comprises an upper edge, a lower edge, and two lateral edges parallel to each other shared with contiguous flat faces, said lateral edges corresponding to said corner areas.

Typically the first polygonal tubular body and the second polygonal tubular body will be formed from a band of material! laminar rolled on itself with its ends partially superimposed and adhered forming a tube. The band of laminar material will have parallel transverse folds that will define the corner areas,

Normally the laminar material will be corrugated cardboard, and habitually! the grooves defined by the corrugation will be parallel to the corner areas, thus being perpendicular to the polygonal bottom of the base body.

The first polygonal tubular body and second body comprise a lower embouchure defined by the flat area enclosed by the lower edges of the piaxial faces, and an upper embouchure defined by e. flat area that enclose the superior cravings of the flat faces.

A first geometrical axis will be defined in the physical center of the first polygonal tubular body, crossing it through the center of both mouthpieces. A second equivalent axis will be defined in the geometrical center of the second polygonal tubular body 5,

The procedure for the. formation of reinforced polygonal drums comprises the step of aligning the two polygonal tubular bodies facing an embouchure of the first polygonal tubular body with an embouchure of the second polygonal tubular body,

Next, the method comprises realizing a relative linear displacement between the two aligned polygonal tubular bodies.

Step c) and step d) will be carried out, preferably in a simultaneous and coordinated manner, by depositing tail lines on a first and / or a second polygonal tubular body in movement, in the direction of the first axis or in the direction of the 15 folds of the corner areas, from applicators of static glue lines or depositing glue lines on a first and / or a second static polygonal tubular body from applicators delineas de cola in movement in the direction of the first axis.

In other words, the displacement of the first or second polygonal tubular body 20 will be coordinated with the tail applicators so that the amount of glue applied is regulated as a function of the speed of said displacement, thus achieving tail lines with a controlled amount of glue. .

In one option, the linear displacement is _; relative between the first polygonal tubular body and multiple crowbar applicators, according to a direction parallel to the bends 25 of the corner areas of the first polygonal tubular body or parallel to the first axis, that is to say that the first polygonal tubular body is displaced by threading the second polygonal tubular body while the tail applicators already! second polygonal tubular body remain static, the tail lines being deposited in the first intrados by applicators: tail located within the first tubular body 30 polygonal and oriented in radial directions facing the first intrados. As said first intrados moves in front of the coia applicators these are depositing the eróla lines parallel to the first axis and the second axis.

Alternatively, the line scroll! is relative between the second tubular body polygon! and the tail finders in a direction parallel to the folds of the corner areas of! second tubular body polygonal or parallel to the second axis. That is to say that the tail applicators are static and are located around the second polygonal tubular body, oriented towards the second extrados. The displacement of the second polygonal tubular body produces the displacement of the second extrados in front of the glue applicators which deposit the glue lines on said second extrados for later insertion of the second polygonal tubular body into the first polygonal tubular body that also occurs. it is static

Optionally, the method further comprises, prior to step d) of insertion, performing an expansion of the first polygonal tubular body by pushing at least the alternate half of the flat faces of the first intrados or all corner areas in a radiating direction! with respect to the first axis, for maximizing the size of at least one embouchure of the first polygonal tubular body through which the second polygonal tubular body is tightly inserted.

That is to say that it is proposed to apply an expansive force on the first intrados of the first polygonal tubular body to: temporarily increase the size of the corresponding embouchure thus facilitating the insertion operation of! second polygonal tubular body.

Said expansive force can be applied by means of an expander device inserted inside the first polygonal tubular body, but which then: would suppose an impediment to the complete insertion of the second polygonal tubular body, and that would therefore force it to be removed in order to complete said insertion or oblige that the expander device will move on the first Intrados as the insertion occurs, for example tiers to apply the expansive pressure on the first intrados by sliding skids or by wheels or freeloaders.

Alternatively, it is proposed that the expansive force be applied only in a portion: end adjacent to the mouth of the first polygonal tubular body by means of nails which, from the outside of! first polygonal tubular body and without interfering in the insertion channel of! Second tubular body within the first tubular body, are introduced into the first tubular body through the embouchure coming into contact with the first intrados. Said nails will be displaced in radial directions away from the center to produce traction on the adjacent areas: at the mouth of the first polygonal tubular body widening the mouth to facilitate the insertion of the second polygonal tubular body to sü through

Said nails may apply an expansive force only until the beginning of the insertion of the second polygonal tubular body within the first polygonal tubular body has been produced, relaxing said expansive force during the rest of the insertion stage, or alternatively they may maintain said expansive force throughout. the insertion period until it has been completed,

The expanding device shall apply expansive force on alternate planar faces, ie on the even faces or on the odd faces, on all flat faces or on all corner areas of the first polygonal tubular body. Any of these three solutions will produce an expansion of the first polygonal tubular body! without modifying its geometry,

Preferably the assembly of the first and second polygonal tubular bodies, generator of the reinforced polygonal tubular body of step d), occurs before the connection of the first polygonal tubular body with the base body of the step jil). The first polygonal tubular body and / or the second polygonal tubular body can be supplied by the expansion: of a first and / or a second flattened polygonal tubular body extracted from a store of first and / or second flattened polygonal tubular bodies.

It will be understood that a store of flattened polygonal tubular bodies contains polygonal tubular bodies that have been collapsed by contacting opposed or adjacent flat faces of the soffit, some of the corner areas forming an angle of 180 ° and forming at least two opposite corner areas An angle of 0 °, The expansion of said flattened polygonal tubular bodies will require separating the intradoses in contact and modifying the angles that form the corner zones until obtaining an expanded polygonal tubular body with an interior hollow.

Equally; the base body can be supplied by bending and gluing of parts of a flat base panel extracted from a base panel store, Optionally said bending and gluing operations of parts of a flat base panel will occur around a lower extreme portion of a; first polygonal tubular body, having been said pane! of base extracted from a store of base panels and located aligned with and adjacent to a mouth of the first polygonal tubular body. Also optionally, step c) and / or ja step iii) include the application of a combination of cold glue and hot glue lines. That is to say that the union of the first and second polygonal tubular bodies and / or the union of the first polygonal tubular body with the base body is carried out by means of a combination of cold glue lines and hot glue lines. The hot glue produces its adhesion very quickly, a! lose temperature, allowing the elements to stay united immediately by accelerating the manufacturing process, however the cold glue takes longer to harden but produces a more resistant adhesion, thus providing a greater structural strength! of the resulting set. The combination of cold and hot glue lines provides the advantages of both glue providing a fast method and a high strength drum,

Optionally, the first polygonal tubular body and the second polygonal tubular body comprise six side walls with which its cross sections are hexagonal, or comprise eight side walls with which its cross sections are octagonal.

According to a second aspect, the present invention presents a polygonal drum forming installation comprising:

® a first device providing first hollow polygonal tubular bodies configured to supply first polygonal tubular bodies consisting of corrugated sheet material and provided with two mouths and a first wall provided with a first extrados accessible from the outside of the first body and a first accessible intrados from the hollow interior of the first body, to place said first polygonal tubular body in an expanded position around a first axis that crosses both mouths; and "a dispenser device for batch bodies configured to supply base panels provided with a polygonal bottom surrounded by a polygonal base wall perpendicular to! same, defining a base extrados accessible from e! exterior of the base body, and a base intrados accessible from an interior of the base body;

a base glue line applicator device configured to apply glue lines base intrados areas of the polygonal base wall and / or in zones of a lower end portion of the first extrados of! first polygonal tubular body; ® a coupler device configured to locate the lower end portion of the first extrados of! first polygonal tubular body facing and in contact with the base intrados of the polygonal base wall of! basic body for the nation of a polygon drum !.

Thus, the proposed installation consists of a supplier of first polygonal tubular bodies which keeps them expanded, with a certain spatial orientation, of a supplier of base bodies, of a device for laying lines of base tail intended to apply lines of glue in a joint area between both bodies, and a coupling device provided to join the base body with the first polygonal tubular body, forming a polygonal drum.

A first device providing first polygonal tubular bodies can be understood as a device that moves the first polygonal tubular bodies from a store of first tubular bodies ipoiigoriaíes to a working position within the installation in ja to perform additional operations on the said first body polygonal tubula.

It can also be understood that a first device providing first polygonal tubular bodies takes first apicultural polygonal tubular bodies, which have the first intrados of different flat faces in contact, from a store of first flattened polygonal tubular bodies and expands them separating said flat faces into contact , placing the first expanded polygonal tubular body in a working position within the installation in which to perform additional operations.

Alternatively, it is also contemplated that the first device providing first polygonal tubular bodies forms said first polygonal tubular bodies from a band or part! of laminar material, by bending and gluing operations thereof, until the obtaining of! first desired polygonal tubular body, which is located in a working position within the installation in which to perform additional operations on it.

The same options are applicable to the base body supplying device. it will likewise be understood that the coupler device can be a device that produces a relative displacement between the first polygonal tubular body and the base body in the direction of the first axis, producing the insertion of the end portion of the first axis. First polygonal tubular body inside the base body, co o alternatively it can refer to the part of the supplying device of base bodies responsible for folding parts of a pane! of base around the end portion of the first polygonal tubular body simultaneously forming the base wall of the base body and also the polygonal drum producing the joining of the first polygonal tubular body with the base body.

The proposed installation also includes, in a way not known in the known state of the art:

«A second device providing second hollow polygonal tubular bodies configured to supply second polygonal tubular bodies constituted of corrugated sheet material and provided with two mouths and a second wall provided with a second extrados accessible from the outside of the second body and a second accessible intrados from the hollow interior of the second body, to place said second polygonal tubular body in an expanded position: around a second axis passing through the mouths;

»An aligner device configured to spatially position the first polygonal tubular body and the second polygonal tubular body aligned with the respective mouths facing each other and with the first intrados of each flat face of the first polygonal tubular body parallel to the second extrados of each flat face of the second body tubular polygonal;

«A tail line applicator device configured to apply parallel lines to! first axis and / or second axis in areas of the first intrados and / or in areas of the second extrados ·

«An insertion device configured to produce a relative displacement between the first polygonal tubular body and the second polygonal tubular body in the direction of the first axis or of the second axis producing the tight insertion of the second polygonal tubular body within the first polygonal tubular body, remaining the second extrados faced, in contact with and adhered to the first intrados, producing a reinforced polygonal tubular body,

The second supplying device will be equivalent to the first supplying device, provided with a second polygonal tubular body of a size slightly smaller than the size of the first polygonal tubular body so that the second polygonal tubular body can be inserted snugly within the first polygonal tubular body

The installation complete an aligner device, provided to locate the first polygonal tubular body and the second polygonal tubular body aligned with their opposite mouthpieces, thus allowing the Insertion device to produce the insertion of the second polygonal tubular body within the first polygonal tubular body i by means of a relative displacement in the direction of the second axis or the first axis, which will be aligned.

A tailing line bending device will have deposited a few lines of glue on the first intrados and / or on the second exíradós so that, after insertion, both polygonal tubular bodies are adhered forming a reinforced polygonal tubular body of improved strength.

Said glue line applicator device may be located outside and around the second polygonal tubular body, including manifolds to tail pilings oriented in radial directions and facing the second ends for the application of lines of col on said second edges.

Alternately he applied device! ' Tail lines may be located within the first polygonal tubular body and consist of multiple tail finders oriented in radial directions and facing the first intrados for the application of tail lines on said first intrados.

It will be understood that the aligner device can integrate parts of the first supplying device and / or of the second supplying device, since said first and / or second supplying devices can be configured to supply the first and second polygonal tubular bodies in already aligned working positions, an additional displacement is not necessary to produce its alignment.

The insertion device produces a relative displacement between the first and the second polygonal tubular body, this means that only the first polygonal tubular body can be displaced by threading it around a second static polygonal tubular body, as it can displace the second polygonal tubular body by inserting it inside. of a first static polygonal tubular body. An intermediate solution in which the insertion device produces a simultaneous displacement of both first and second polygonal tubular bodies is also contemplated. Optionally, it is contemplated that the installation also includes an expander device configured to apply, by means of pushers, a radial expansion pressure with respect to the first axis on multiple flat faces of the first intrados or on corner areas to maximize the size of at least one embouchure of the first polygonal tubular body through which the second polygonal tubular body is inserted, preferably over at least the alternating half of the flat faces of the first intrados or over all the corner areas.

According to one embodiment said expander device consists of a plurality of nails arranged around an insertion passage of the second polygonal tubular body within the first polygonal tubular body, surrounding an opening of a first polygonal tubular body, said nails being displaced from a position of rest in Ja that do not interact with the first polygonal tubular body, up to a position of expansion configured so that the nails are introduced through the embouchure into the first polygonal tubular body, supplied by the first supplying device, coming into contact with a portion extreme of the first intrados adjacent to the embouchure applying the expansive pressure.

That is to say, said nails, from a rest position located around the mouth of the first polygonal tubular body, will move to the expansion position entering inside the first polygonal tubular body through the mouthpiece, coming into contact with the first intrados. by applying traction in radial directions on said first intrados, the nails will occupy a negligible space of the interior of the first polygonal tubular body, not interfering in the insertion passage of the second tubular body.

Optically it is contemplated that the nails are associated with a ramp piano located above the mouthpiece and with one end aligned with the nail, so that the set of ramp planes of the different nails define a funnel section to facilitate The insertion of the second polygonal tubular body through the embouchure of the first polygonal tubular body.

The apiicador device of lines of tail that applies coía on the polygonal tubular bodies can be integrated into the nails of the expander device, including: tail finders directed towards the insertion passage, configured to apire the lines and the second extrados of the second body tubular poiigonai.

Both the nails of! Expander device as the bearer of tail lines, if integrated into said nails, will not present relative movement with respect to the first polygonal tubular body during the insertion step applied by the insertion device, remaining static together with the first tubular body while moving in the second polygonal tubular body or moving together with the first polygonal tubular body! while the second polygonal tubular body remains static.

Therefore, according to this embodiment provided with an expander device such as that described, the insertion device may only displace the second polygonal tubular body or alternatively may displace the first polygonal tubular body assembly together with the expander device and the integrated tail applicators. in the expander device.

The second supplying device may include, according to another envisaged embodiment, an adjustable expandable male between a retracted position in which its size is smaller than the size of the inward gap; second tubular body to allow its insertion into the interior of a second polygonal tubular body _, and an extended position in which its size increases until the second intrados of the second polygonal tubular body is pushed in a radiating direction! expansive with respect to the second axis.

Optionally the expandable male is displaced in a direction parallel to the second axis and constitutes the insertion device, displacing the second polygonal tubular body by inserting it into the first polygonal tubular body.

In this embodiment, the tail line applicator device may be located at one end of the expandable core, including tail applicators disposed radially outwardly, configured to project from the second polygonal tubular body and to lie within the first polygonal tubular body facing each other. to the first intrados, applying lines of glue on the first mentioned intrados.

The base glue line applicator device and / or the glue line bearer device to the polygonal tubular bodies may combine cold gola delineated applicators and hot glue line applicators.

By way of illustration: the insertion device may be a fluid-dynamic cylinder or a piston or a robot arm.

The glue line applicators may comprise glue injection modules or glue applicator rolls, indicated here by way of example.

Preferably, each glue applicator: comprises in use a! minus one tail injection module. It also comprises in use at least one injection nozzle in Each core injection module also comprises, in use, a tail injection direction defined by tail injection by fas nozzles, with which the tail application of each tail line finisher is carried out in accordance with respective injection directions. the tail oriented,

Preferably, the proposed installation will include a control device configured to coordinate the insertion device with the tail line lancing device in charge of depositing the tail lines on the first or second second polygonal tubular body.

This allows coordinating both the start and end moment of the deposition of the tail lines with the relative movement between both first and second polygonal tubular bodies, thus controlling the position and length of said tail lines, as well as the amount of tail deposited, affecting the thickness of the dimension lines, by the precise control of the relation between tail deposition speed and displacement velocity of the first or second polygonal tubular body. This allows to adjust the resistance of the resulting drum as well as cost, optimizing the use of adhesive.

This also makes it possible to control the injection of glue lines continuously or discontinuously.

According to a third aspect, the present invention concerns a reinforced polygonal drum that includes, in a manner known in the state of the art:

® a first hollow polygonal tubular body constituted of corrugated sheet material and provided with two mouths and a first wall provided with an even number of flat faces greater than four defined between corner areas, said first wall defining a first extrados accessible from the exterior of the first body, a first intrados accessible from the hollow interior of the first body and a first axis defined in the center of the first hollow polygonal tubular body through the two mouths;

_® one body provided with a polygonal base background surrounded by a base wall poli ^'gonaí perpendicular thereto, having the same polygonal stop base number of sides than the first tubular body polygonal! and defining a base extrados accessible from the outside of the base body and a base intrados accessible from the inside of the base body; a lower end portion of the first excerpt of the first polygonal tubular body joined to the intrados of base with the base wall being poiigonal of the base body being formed by glue forming a polygonal drum.

However, the proposed drum also includes the following characteristics not known in the existing state of the art;

a second hollow polygonal tubular body inserted snugly within the first polygonal tubular body, the second polygonal tubular body being made of corrugated sheet material and provided with two mouths and a second endowed with equal number of flat faces as the first tubular body poiigonal, defined between corner areas, defining a second extrados faced adjacent to the first intrados of the first polygonal tubular body, and a second intrados accessible from the hollow interior ele! second polygonal tubular body and a second axis defined in the center of the second hollow polygonal tubular body crossing the two mouthpieces, the cross section being! of the second extrados of a complementary shape and size with the cross section of! first Intrados of the first tubular body poíigonaí;

the second extrados being attached to the first intrados by tail lines parallel to the first axis © to the second axis.

The addition of the second polygonal tubular body offers improved resistance to the resulting drum without requiring the use of exotic sheet materials adapted to each concrete need of the drum, but allows to employ more common, less resistant sheet materials and combine them in the desired manner for obtain the required resistance in each case.

Preferably the laminar material used will be: corrugated cardboard, typically double-sided corrugated cardboard with three sheets (two smooth sheets and a corrugated sheet), five sheets (three smooth sheets and two corrugated sheets) optionally also double-sided corrugated cardboard with seven sheets ( four smooth sheets and three corrugated sheets), all the materials available, recyclable and easily available in the sector

Preferably the tail lines will combine cold tail lines and hot tail lines. It will be understood that the mention of the hot and cold glue does not mention its temperature, but rather the type of glue used, with the tail being a level that is applied hot and that produces adhesion very quickly, and the glue being cold a glue applied at a lower temperature than a hot glue and what has a slower drying.

Both tails have different chemical compositions, different aspects once dry, and are perfectly distinguishable by an expert in the field once they have been dried.

It is also proposed that the second extrados be adhered to | first intrados by at least one tail line parallel to! first axis on each of the faces.

It is further contemplated that the lower end portion of the first extrados of the first polygonal tubular body is Adjoined to the base intrados of the polygonal base wall of the base body by second perpendicular glue lines and / or that they form an Inclined angle with respect to to the coffer lines that adhere the first Intradós and the second extradós of the polygonal tubular body.

BRIEF HISTORY OF THE DRAWINGS To _: complement the description that is being made and in order to help a better understanding of the characteristics of the invention, a set of drawings is included as an integral part of said description, in an illustrative and non-illustrative manner. limitative, the following has been represented: Fig. 1 shows an octagonal reinforced polygonal drum formed, showing in dashed lines the tail lines joining the first and second polygonal tubular bodies; Fig. 2 shows a plant of the drum shown in Fig. t; Fig. 3 shows an enlarged detail of a corner area of the drum shown in Fig. 2 in pianta; the Fígs. 4 and 5 show two views in pianta of a base panel for the formation of a base body like the one integrated in the polygonal drum shown in Fig. 1, formed by cut corrugated cardboard defining a polygonal background surrounded by connecting flaps sides by means of fold lines, showing different tail line arrangement on said base panel, the tail lines being shown in Fig. 4 only to form a base body, and the tail lines shown in Fig. 5 being suitable for the formation of the base body and for its adhesion around a first polygonal tubular body; Figs. 8 to 10 show a schematic elevation view according to five different embodiments of the proposed method of assembling the first and second polygonal tubular bodies, each figure showing three successive stages of! method proposed in each case; FIGS. 11 to 15 show a perspective view of a proposed installation for the formation of drums, showing the position of the different components of the installation in five successive stages of the method; Fig. 16 shows a detailed vertical section of a second installation station shown in Fig. 12, in a position in which a second polygonal tubular body is above and aligned with a first polygonal tubular body, before proceeding to its insertion; Figs. 17 and 18 show a detailed view of one embodiment of the expander device equipped with eight nails and which integrates a glue line applicator device for the application of glue lines on the second end of a second tubular body that is inserted inside the first tubular body, showing two positions of said nails.

DETAILED EXHIBITION OF REALIZATION MODES / EXAMPLES

According to a first aspect, the present invention provides a method for the formation of reinforced bodies of laminar material.

Fig. 1 shows a polygonal drum formed, according to a preferred embodiment, by a reinforced polygonal tubular body attached to a base body 3 provided with a polygonal bottom and a base wall 5, the reinforced polygonal tubular body being formed by a first polygonal tubular body 1 and a second polygonal tubular body 2 inserted one within the other tightly and joined by vertical tail lines parallel to each other and perpendicular to the polygonal bottom of the base body 3

The first polygonal tubular body 1 is a body in the shape of a hollow tube, with its two open ends forming mouths of polygonal section surrounded by a first wall 8 defined by an even number greater than four of flat 7 faces each comprised between two zones of corner 8 where the first wall 6 forms a fold line corresponding to a corner of! polygonal drum, said first wall 8 defining a first axis El in the center of! first polygonal tubular body 1. The first wall 6 defines a first extrados 8a, corresponding to the outer face of the first polygonal tubular body 1, and a first intrados 6b corresponding to the inner face of said first polygonal tubular body 1.

The second tubular body polygoni 2 has identical construction, with a second wall 9 which defines a second extrados 9a. a second intrados 9b and a second axis E2 at its center.

The proposed base body 3 is formed by a polygonal bottom 4 surrounded by a polygonal base wall 5 perpendicular to said polygonal bottom 4, The base wall 5 will also define a base extrados 5a on its outside and a base intrados 5b on its interior.

Both polygonal background! 4 as the polygonal base wall 5 will have a number of sides equal to the number of faces 7 of the first polygonal tubular body 1, and their size and proportion will be complementary to those of the first polygonal tubular body 1.

The polygonal background 4 is placed coinciding with one of the mouthpieces of the first polygonal tubular body 1, the base intrados 5b being the base wall 5 surrounding and in contact with an end portion of the first extrados 6a: of the first adjacent polygonal tubular body 1 to its embouchure.

All the constituent elements of the polygonal drum proposed are preferably made of corrugated cardboard made from a combination of smooth sheets joined with adhesive to corrugated sheets, ie folded sheets forming a corrugated in the form of parallel grooves, the result is a lightweight material and resistant as well as economical and recyclable.

Said second polygonal tubular body 2 is nested in the interior of a first polygonal tubular body 1

Each first and second polygonal tubular body 1 and 2 of the present embodiment is constituted by a strip of rigid corrugated cardboard of two faces, folded by transverse folds, parallel to each other and parallel to the corrugated, until contacting the two opposite ends of the band, forming a closed envelope, for example the ends being joined together by flaps.

Alternatively, the opposite ends of the same band can be confronted with the test, leaving the constituent band of! first closed polygonal tubular body 1 when joining the other constituent band of the second polygonal tubular body! two The second extension 9a of each face 7 of the second polygonal tubular body 2 is faced, in contact with and adhered to a face 7 of the first intrados 6b of the first polygonal tubular body 1 by a plurality of tail lines C2 parallel to! first axis E1 and / or second axis E2, which ideally will also be parallel to the grooves of the second axis. Corrugated cardboard constituting said first and second polygonal tubular bodies 1 and 2;

In the body, the base 3 is formed, in this preferred embodiment, from a base panel 3a of rigid corrugated cardboard cut and bent to form the described base body 3.

The base panel 3a is cut out defining e! polygonal background 4 of the same shape and size as the base of the first polygonal tubular body 1, and is surrounded by sides 5c joined to the edges of the polygonal bottom 4 through bending lines, each side 5c defining, after bending to 8 ( F, one of the flat faces of the base wall 5. At least part of the sides will also include flaps 5d joined to their lateral edges through fold lines so that, once the sides 5b and the flaps 5d are folded, these will be superimposed on adjacent sides 5c giving continuity to the base wall 5 around the first polygonal tubular body 1,

In Figs. 4 and S show different embodiments in which tail lines C1 parallel to each other have been applied on different areas of the base panel 3a. The application of all parallel tail lines C1 to each other allows said tail lines C1 to be applied by a bridge of applicators, the base panel 3a moving below said bridge of applicators in a forward direction parallel to the lines of glue C1 to be deposited, for example between a store of base panels A3 and a working position where the base body 3 is formed. The individual control of each glue applicator allows its precise deposition in the desired areas of the base panel 3a ,

After the folding of the base panel 3a the tail lines 01 applied on the flaps 5d will join the intrados of said flaps Sd where the tail lines have been deposited ai extrados from the sides 5c, thus forming the base wall 5 of the body of base 3, The tail lines can also be applied on the intrados of the sides 5e before folding, thus allowing the intrados of said sides 5c to be adhered to! first extradós 6th of! first polygonal tubular body 1 forming the drum, either by performing the folding operation of the base panel 3a directly on the end portion of the first polygonal tubular body 1, or by first forming the body of base 3 by bending it and then inserting the end of the first polygonal tubular body 1 therein.

Rigid corrugated cardboard is that corrugated cardboard formed by at least two smooth sheets with a! less an interposed corrugated sheet adhered to the two smooth sheets, forming a double-sided corrugated cardboard. Adding more smooth sheets and more corrugated sheets to the set is obtained triple-sided corrugated cardboard, quadruple face, etc,

Since the number of flat faces 7 of the first and second polygonal tubular bodies 1 and 2, for example six or eight, hexagonal or octagonal drums are obtained, which can be regular, ie with all their faces 7 of the same length, or irregular, for example. example with faces 7 of two different alternate lengths.

The hexagonal or octagonal drums have higher resistance than the square drums, especially in front of the expansive force that a liquid, pasty or granular product can produce inside it, due to the fact that the length of the faces 7 in ios Hexagonal and octagonal drums are smaller than in square drums of equivalent volume. The compressive strength also improves since each corner zone 8 acts as a reinforcing column, and as the number of said corner areas 8 increases, the reinforcing columns increase and therefore the load that the compression drum can withstand. .

These hexagonal and octagonal geometries also allow a better use of! space by grouping multiple drums in comparison with other polygonal shapes such as the pentagon; although the octagonal solution is preferable to maximize e! use of the existing square space on a pallet. Two faces 7 adjacent piaries form an angle with each other in said corner area 8. The number of faces 7 being an even number greater than four ensures that the angle formed between said faces at an obtuse angle, preferably greater than 120. °,

In the example shown in Fig. 1 the polygonal drum is octagonal, and by So both consists of eight substantially flat faces 7 and eight corner zones 8 located between the faces 7. In this example all faces 7 are substantially flat. equal length in plant so they form a regular octagon, with the angle existing in the corner areas 8 of 135 °, as can be seen in Fig. 2,

According to another embodiment not shown the face humerus 7 can be another humerus greater than four different from eight, for example six, forming angles of 120 ° in the corner areas 8, ten forming 144 ° or twelve angles forming 150 ° angles. It is also contemplated to include a plastic bag inside the drum, whose maximum diameter is equal to or greater than the maximum interior cross section of! polygonal tubular body 10. This allows storing and preserving a product, even liquid or moist, in the proposed drum, transmitting the hydrothermal pressure produced by the material stored to the multilayer wall and to the plastic bag.

Figs. 6 to 10 schematically show different embodiments of the method of forming the reinforced polygonal tubular body by assembling the first and second; second polygonal tubular body 1, 2.

E all the embodiments of this part of the method shown in Figs. the assembly begins by locating the second polygonal tubular body 2 above the first polygonal tubular body 1, the vertical position of the respective first axis El and the second axis E2 vertically and mutually aligned. The first and the second polygonal tubular body! 1 and 2 will also have the same angular position, that is to say that their respective faces 7 will be parallel, leaving the mouths of the tubular bodies: polygonal 1 and 2 facing each other.

In the embodiment shown in Fig. 6 an insertion device 80 pushes the second polygonal tubular body 2 in a downward vertical direction parallel to the first axis El and the second axis E2, producing its insertion; fitted inside the first polygonal tubular body 1 through an embouchure _: upper thereof. During said displacement the second extrados 9a of each flat face 7 of the second polygonal tubular body 2 passes in front of a stacker of: static tail 51, integral with a device for piling tail lines 50, which deposits a tail line C2 on each side 7 of said second extrados 9a as they move ahead of the static tail applicators 51.

In this embodiment the tail applicators 51 will be located in a radial arrangement around an insertion passage defined by the downward travel of the second polygonal tubular body 2, between the initial position of the first and the second polygonal tubular body 1 and 2, oriented towards inside said cited insertion passage, in convergent directions, to be confronted with the second extrados 9a when it moves through said insertion passage.

As a result e! device for applying tail lines SO will deposit vertical parallel lines C2 parallel to each other and parallel to the first and second axes E1 and E2 on the second extrados 9a of! second polygonal tubular body 2 which will then be inserted snugly inside the first polygonal tubular body 1 remaining said second extracts 9a in contact and adhering by means of said tail lines G2 to the first intrados 6b of the first polygonal tubular body 1,

Fig. 7 shows an alternative embodiment in ja that the insertion device 80 together displaces the first polygonal tubular body 1 and the tail line applicator device 50 in an upward vertical direction, the tail lines C2 also being deposited on the second extrados 8a of the second polygonal tubular body 2 as said displacement occurs which also produces in skewing of the first polygonal tubular body: 1 around the second polygonal tubular body 2. In Fig. 8 an alternative embodiment of this stage of the method similar to the one shown in Fig. 6 but in which the glue line applicator device 50 is moved together with the second polygonal tubular body 2 in a downward direction, for example being attached to a lower end of the Insertion device 80 which traverses all ! second tubular body polygons 2 for its interior.

In this case, the tail applicators 51 will be located within the insertion passage, confined within the vertical projection of the first polygonal tubular body 1 thereby allowing the tail line applicator device 50 to be inserted into the first polygonal tubular body 1. through its embouchure during the downward displacement of the second polygonal tubular body 2,

In this embodiment the glue applicators 51 will also be located in a radial arrangement but will be oriented outward in divergent directions, so that when the glue line applicator 50 is inserted within the first polygonal tubular body 1, each glue applicator 51 face the first intrados 6b of a face 7 of! first polygonal tubular body 1, allowing the application of a tail line C2 thereon as the tail line applicator moves in a downward direction, also producing the adhesion of the second extrados 9a and the first intrados 6b.

Fig. 9 shows a similar embodiment of this method step similar to that shown in Fig. 8 but in which the second tubular body 2 and the tail line applicator device 50 hanging below it remain static, while the insertion device 80 is responsible for displacing the first polygonal tubular body i in an upward vertical direction by threading it around the second polygonal tubular body 2 while displacing the first intrados 6b in front of the tail applicators 51 of the line applicator device. of tail 5G allowing them to deposit vertical glue lines G2 on said first intrados 6b. The Fig. 10 shows another contemplated embodiment of this step of the method according to which the deposition of the coia lines C2 does not occur simultaneously with the displacement cié Insertion of the two polygonal tubular bodies. According to this embodiment the glue line applicator device 50 is provided with a displacement mechanism that allows its vertical de-zipping by moving the glue applicators 51 in front of the second extrados 9a for the deposition of glue lines C2. Once the tail lines C2 are applied, the insertion device 80 can proceed to produce the relative displacement between the first and the second polygonal tubular bodies 1 and 2, producing their assembly.

Of course an equivalent construction in which the wave line applicator device 50 is displaced inside the first polygonal tubular body 1 for the deposition of glue lines C2 on the first intrados 6b is also contemplated even though it has not been shown in the Figures,

Therefore, the present method proposes that the tail lines C2 can be arranged both on the second exirado Qa, adhering to the first intrados 6b, and an inverse construction is contemplated by depositing them on top of it. first intrados 8b for its adhesion to the second extrados 9a.

The Fig. 11 to 16 show an example of embodiment of the proposed installation, in different stages of the manufacturing method of the reinforced polygonal drum.

The installation shown consists, according to this embodiment, of four successive stations.

The first station includes a store of second flattened polygonal tubular bodies A2, where, in this example in a vertical position, a plurality of second flattened tubular bodies 2a which are co-stored are stored, with the second intrados 9b of their faces 7 in contact with each other. others, their corner areas 8 forming angles of 180 ° and 0 ^or

In this first station a second supply device 20 extracts a second apical tubular body 2a from the corresponding store and expands it separating the second intrados 9b from its faces 7, modifying the angle of the corner areas 8 until obtaining a second polygonal tubular body 2 expanded and hollow, in this example of an octagonal plan.

In this embodiment the second supply device 20 includes a carriage equipped with suckers which moves in a horizontal direction perpendicular to the second flattened tubular bodies 2a stored in the store of second flattened tubular polygonal bodies A2, allowing in one position to adhere to the second Exhausted 9a from a face 7 of a second flattened polygonal tubular body 2a stored and pulled it out of the store producing its expansion.

The second supplied device 20 further includes a expandable male 21 held below a movable arm.

As shown in Fig. 11 and in Fig. 16, the epableable male 21 has a general shape complementary to the hollow interior of the second polygonal tubular body 2 * allowing its insertion therein, and consists of expandable members 22. displacements in radial directions, which can be expanded from the retracted position, which allows their insertion into the second polygonal tubular body 2, to an expansion position in which they exert pressure on the second intrados 9b of the second polygonal tubular body 2 to complete their expansion , correctly define its geometry in this octagonal case, and to produce the grip of the second polygonal tubular body 2 to the expandable male 21.

In Figs. 17 it is observed that the expander members 22 are joined by radial articulated arms 23 to a central shaft 24 displaced vertically by the action of an actuation The vertical displacement cié! central tree 24 produces the modification of! angle formed by the articulated radial arms 23 both with respect to the central shaft 24 and with respect to the expandable members 22, by modifying the existing distance between the expandable members 22 and the central shaft 24 and thereby producing the expansion or retraction of the expandable male 21,

In movable arm it allows a vertical displacement of the expandable male 21 also a horizontal displacement thereof moving it from one station to the next. In the first station the mobile arm allows, mediating a downward movement. Inserting the expanded mandible 21 into a second polygonal tubular body 2 freshly withdrawn from the storage of second flattened polygonal tubular bodies A2, The second station of the installation is very similar to the first station, including a store of first flattened polygonal tubular bodies Ai and a first 1D supplying device _>

The second station does not have an expandable male, however in this embodiment it is proposed that the second station further include an expander device 90 formed by a plurality of claws 91 arranged radially around the mouth of the first polygonal tubular body 1 which has been expanded by the first supplying supplier 10.

Said expander device 90, shown in detail in Figs. 17 and 18, consists in this example of 8 nails 91, one for each side of the first polygonal tubular body 1, radially arranged around the mouth of the first polygonal tubular body 1 _: each nail being detached in a radial direction between a fox position (shown in Fig. 17) in which they do not interact with the first polygonal tubular body! 1, and a position of expansion (shown in FIG. 18) configured so that the nails 91 are inserted through the mouthpiece into the first polygonal tubular body 1 supplied by the first delivery device 10 coming into contact with a region of the first intrados 8b adjacent to the embouchure applying expansive pressure.

Each nail 91 may be connected to an indian piano 92, so that the set of inclined pianos of the different nails determine a funnel portion that facilitates the insertion of the second polygonal tubular body 2 within the first polygonal tubular body 1,

Said pressing device 90 allows to ensure the complete and correct expansion of the first body: polygonal tubular 1 without obstructing hollow interior of the first polygonal tubular body 1 that constitutes the insertion passage of the second polygonal tubular body 2.

The movable arm allows to hoist the second polygonal tubular body 2, joined to the expandable male 21, and place it above the first polygonal tubular body 1 located in the second station by a lateral displacement, aligning their respective first and second axes E1 and E2i said mobile arm constituting an alignment device 79.

The movable arm also allows a vertical displacement of the second polygonal tubular body 2 with respect to the first polygonal tubular body 1, producing its assembly by insertion, therefore the movable arm is also considered to constitute an insertion device 80.

Said movable arm can include a vertically extendable arm, constituting the insertion device 80, mounted on a detachably sliding carriage, constitutive of the It is alternatively contemplated that the mobile arm may be a robotic arm with multiple: articulated segments :, which will therefore be constitutive of the attaching device 70 and of the insertion device 80 simultaneously.

In this embodiment, the second station also integrates a tail line sizing device SO, formed by a plurality of tail applicators 51 located radiantly around the insertion passage of the second polygonal tubular body 2 within the first polygonal tubular body t and oriented in convergent directions towards the interior of said insertion passage.

In this example the glue applicators 51 are integrated nail expander device 91 dei S0, tai and as shown in Figs 17 and 18..

Each nail 91 mounts at least one tail applicator 51 which is also proposed to be moved in a radiating direction! on said nail 91 allowing it to be removed so as not to be superimposed on the inclined plane 92 located above each nail 91 during the initial insertion of the end of the second tubular body _. polygonal and allowing to move to bring the tail finders 51 to the second extra or 9a of the second polygonal tubular body 2,

The third station of the installation includes a store of base panels A3, where a plurality of base panels 3a, as shown in Fig. 4 and 5, are stored in this horizontal example.

In this third station a supplying device of base bodies 30 extracts a base panel 3a from the corresponding store, applies lines of glue G1 on areas of the base panel 3a by means of a device for supplying lines of base cois 40, and proceeds to bend parts of said base panel 3a forming a base body 3 also octagonal.

The base glue line supplying device 40 is proposed to be a bridge equipped with glue applicators located between the base panel storage A3 and the working position where the base body 3 joins the polygonal tubular body, so that by moving the base panels 3a below said bridge by the base body supplying device 30, the glue applicators can deposit glue lines C1 on zones of said panel! of base 3a.

In this embodiment the movable arm extracts the reinforced polygonal tubular body formed in the second station by assembling the first and second polygonal tubular bodies 1 and 2 and locating them in the third station, supporting a lower end portion of said polygonal tubular body over a base panel 3a located on a base body forming device 31 integral with the base body supplying device 30.

The folding of part of the base panel 3a, on the part of the base-forming device 31, around the lower end portion of the first extrados 8a of the polygonal tubular body produces the base body 3 and simultaneously joins it to the polygonal tubular body forming a reinforced polygonal drum. Therefore, it should be concluded that the aforementioned device for forming base bodies 31, in collaboration with the mobile arm, constitutes a coupling device 60 that allows the connection of the first polygonal tubular body! i with the base body 3,

The photometer device of base bodies 31 will consist, as shown in FIG. 14, of a plurality of Polar panels 32 arranged radially around a work position of the same shape and size as the lower end portion of the first polygonal tubular body. 1, intended to position the lower end portion of the polygonal tubular body thereon with an interposed base panel 8a.

Each bender panel 32 can swing, driven by a piston, from a retracted position, which allows positioning a base panel 3a in a flat position on them, and an active position in which the Flooding panels 32 are raised by folding a part of the panel of base 3a and pressing it against the lower end portion of the first extrados 6a.

In this season, the male expander 21 will act as an anvil for the bender panels.

Finally, the expandable male 21 will be retracted allowing it to be extracted from the inside of the drum already formed by the mobile arm :, the drum being extracted from the installation in an extraction station.

Of course it will be understood that the stations could be in another order or arrangement, and be separated, the polygonal tubular bodies being moved from one station to the next by different means to the described mobile arm.

It will be understood that the different parts constituting the invention described in one embodiment can be freely combined with the parts described in other different embodiments although said combination has not been explicitly described, provided that there is no prejudice in the combination.

Claims

1, Method of forming polygonal drums comprising;

i. supplying a first hollow polygonal tubular body (1) constituted of material! corrugated sheet and equipped with two hollow mouths and a first wall {6) provided with an even number of flat paras (7) greater than four defined enters corner areas (8), said first wall (6) defining a first extrados (6a) ) accessible from the outside of the first body (1), a first intrados (6b) accessible from the hollow interior of the first polygonal tubular body (1) and a first axis (El) defined in the center of the first polygonal tubular body (1) hollow crossing the mouths;

you. providing a kiss body (8) provided with a polygonal bottom (4) surrounded by a polygonal base wall (5) perpendicular to the polygonal bottom (4), the base wall (5) having a polygonal equal number of sides as e! first polygonal tubular body (1) and defining a base extrados (5a) accessible from the outside of the base body (3) and a base intrados (5 b) acoesifelé from inside the base body (3);

iji, attaching a lower extreme portion of the first extrados (6a) of the first polygonal tubular body (1) to the base inhabitant (5b) of the polygonal base wall (5) of the as ^ (o) body by tail lines (C1) ) forming a polygonal drum; characterized in that the proposed method further includes the following steps: a) supplies a second hollow polygonal tubular body (2) constituted of corrugated sheet material provided with two hollow mouths and a second wall (9) provided with an equal even number of flat faces (7) ) that the first polygonal tubular body (1), also defined between corner areas (8), defining a second extrados (9a) accessible from the outside of the second polygonal tubular body (2), a second intrados (9b) accessible from the hollow interior of the second polygonal tubular body (2) and a second axis (E2j defined in © I center of the second polygonal tubular body (2) crossing the two mouths, the cross section of the second extiadós (9a) being of a complementary shape and size with the cross section of the first intrados (6b) of the first polygonal tubular body (t) suitable for a tight fitting between them;

b) align the first axis (El) of! first polygonal tubular body (!) with the second axis (E2) of the second polygonal tubular body (2) leaving the respective opposing mouthpieces and placing the first intrados (6b) of each flat face (7) of the first polygonal tubular body (i) parallel to the second extrados (§a) of each flat face (7) of! second polygonal tubular body (2);

c) applying glue lines (C2) parallel to the first axis (E1) and / or to the second axis (E2) on the second extrados (9a) of the second polygonal tubular body (2) and / or on the first intrados (6b) of! first polygonal tubular body (1);

d) performing a relative displacement between the first polygonal tubular body (1) and the second polygonal tubular body (2) in the direction of! first axis (El) or second axis (E2) producing the fitted insertion of the second polygonal tubular body (2) inside the first polygonal tubular body (1), the second extrados (9a) being in contact with and adhering to first intrados (8b), producing a reinforced polygonal tubular body,

2. Method according to claim 1 wherein before performing step d) an expansion of the first polygonal tubular body {1} is performed by pushing multiple flat faces (7): and / or corner areas (8) of the first intrados (6b) in a radial direction with respect to the first axis (E1), to maximize the size of at least one embouchure of the first polygonal tubular body (1): through which the second polygonal tubular body (2) is inserted.

The method according to claim 1 or 2, wherein step c) and step d) are carried out simultaneously and in a coordinated manner, depositing tail lines (C2) on a first and / or a second polygonal tubular body (1, 2) in movement in the direction of the first axis (El) from applicators of static tail lines (51) integrating a device supplying tail lines (50) or depositing line tail (G2) on a first and / or a second tubular body static polygonal (1, 2) from coil line applicators (519 moving in the direction of the first axis (E1) integrating a tail line supplying device (50).

4. Method according to claim 1, 2 or 3 wherein the assembly of the reinforced polygonal tubular body of step d) occurs before the union of the first polygonal tubular body (I) with the base body (3) of the stage üi ).

5, Method according to any one of the preceding claims wherein the first polygonal tubular body (1) is held static during step d), the displacement of the second polygonal tubular body (2) being produced for insertion into the first tubular body (1) static)

Method according to any one of the preceding claims, wherein:

the first polygonal tubular body (1) is supplied by the expansion of a first flattened polygonal tubular body (1a) extracted from a store: of first apicultural polygonal tubular bodies (Ai); or

the second polygonal tubular body (2) is supplied by the expansion of a second flattened polygonal tubular body (2a) extracted from a store of second flattened polygonal tubular bodies (A2); or

the base body (3) is supplied by bending and gluing operations of parts of a flat base panel (3a) extracted from a store of base panels (A3); or

"The base body (3) is supplied by bending and gluing operations of parts of a flat base panel (3a) around a lower end portion of a first polygonal tubular body (1), said base panel having been ( 3a) extracted from a store of base panels (A3) and located aligned with and adjacent to a mouth of the first polygonal tubular body (1).

Method according to any one of the preceding claims, wherein step c) and / or step iii) include: the application of a combination of cold glue and hot glue lines.

8. Polygonal drum forming installation comprising:

® a first supply device (10) configured to supply first polygonal tubular bodies (1) constituted of corrugated sheet material and provided with two mouths and a first endowed wall (S): of a first exudados (Sa) accessible from the outside of the first tubular body polygon! (1) and a first intrados (6b) accessible from the hollow interior of the first polygonal tubular body! (1), and to place said first polygonal tubular body (1) in an expanded position around a first axis (E1) that traverses both mouths;

»A base body supplying device (30) configured to supply base bodies (3) provided with a polygonal bottom (4) surrounded by a polygonal base wall (5) perpendicular thereto, said base stop (5) defining A base exirados (5a) accessible from the outside of the base body (3). and a base intrados (5b) accessible from an interior of the base body (3); »A base queue line setting device (40) configured to apply base line (O!) Regions in areas of the base intrados (5b) of the polygonal base (5) and / or zones of a bottom end portion of the first extrados (8a) of the first polygonal tubular body (i);

• a device: coupler (80) configured to position the lower end portion of the first extrados (6a) of the first polygonal tubular body (1) facing and in contact with the base intrados (5b) of the polygonal base wall (5) of the base body (3) for the formation of a polygonal drum;

characterized because the: "installation also includes:

• a second supply device (20) configured to supply second hollow polygonal tubular bodies (2) constituted of corrugated sheet material and provided with two mouths and a second wall (9) provided with: second extrados (9a) accessible from the outside of the second polygonal tubular body (2) and of a second intrados (9b) accessible from the lower hollow of the second polygonal tubular body (2), and to place said second polygonal tubular body (2) in an expanded position around a second axis (E2) ) that crosses both mouths;

• an aininer device (70) configured to spatially position the first polygonal tubular body (1) and the second polygonal tubular body (2) aligned with the respective mouths facing each other and with the first intrados (8b) of _: each face (7) flat of the first polygonal tubular body (1) parallel to the second extrados (9a) of each flat face (7) of the second polygonal tubular body (2);

* a line queuing device (50) configured to apply queue lines (C2) parallel to the first axis (E1) and / or to the second axis (E2) in areas of the first intrados (8b) and / or zones of the second extrados (9a);

• an insertion device (80) configured to produce a relative displacement between the first polygonal tubular body (1) and the second polygonal tubular body (2) in the direction of the first axis (El) or of the second axis (E2) producing the adjusted insertion of the second polygonal tubular body (2) within the first polygonal tubular body (1), the second extrados (9a) being in contact with and adhering to the first intrados (6b), producing a reinforced polygonal tubular body.

9, Installation according to claim 8 wherein the installation further includes an expander device (90) configured to apply, by means of pushers, a radiating pressure! of expansion with respect to! first axis (El) on ai less multiple faces (7) flat of! first intrados (6 b) and / or on corner areas (8) to maximize the size of at least one embouchure of! first polygonal tubular body (1) through which to insert e! second polygonal tubular body (2).

1 D, installation according to claim 9 wherein the expander device (90) consists of a plurality of nails (91) arranged around an insertion passage of the second polygonal tubular body (2) inside the first polygonal tubular body (i) _: surrounding a mouth of a first polygonal tubular body (1), said nails (91) being detached from the rest position in which they do not intertwine with the first polygonal tubular body (1), up to an expansion position configured so that the nails ( 91) are inserted through the embouchure inside! first polygonal tubular body (1): supplied by o! first supplying device

(10) coming into contact with an area of the first intrados (6b) adjacent to the embouchure applying expansive pressure,

11, Insiation according to claim 10 wherein e! glue line applicator device (50) that applies glue on the first and / or the second tubular body (1, 2) is integrated in the nails (91) of the expander device (90), including glue applicators (51) directed towards the insertion passage, configured to face each other and to apply the tail lines on the second extrados (9a) of the second polygonal tubular body (2),

12. Installation according to any one of the preceding claims 8 to 11, wherein the second supply device (20) includes an expandable male (21) adjustable between a retracted position in which its size is smaller than the size of the inner space of the second polygonal tubular body (2) to allow its insertion in it inside a second polygonal tubular body (2), and an extended position in which its size increases until pressing e! second intrados (9b) of the second polygonal tubular body (2) in a radial direction expansive with respect to the second axis (E2).

13. Installation according to claim 12 wherein the expandable male (21) is disposable in a direction parallel to the second axis (E2) and constitutes the insertion device (80).

14 installation according to claim 12 or 13 wherein the tail line applicator device (50) is located at one end of the expandable male (21), including tail applicators (51) arranged radially outwardly oriented, configured to project from the second polygonal tubular body (2) and to remain inside the first polygonal tubular body (1) facing to the outside; first intrados (6b).

15, Installation according to any one of the preceding claims 8 to 14, wherein e! Applied device? ^The base glue lines (40) and / or the glue line applicator (50) to the polygonal tubular bodies (1, 2) combine cold glue line finders and hot glue line finders,

16 installation according to any one of the preceding claims 8 to 15, wherein the installation further includes a control device configured to coordinate the actuation of the insertion device (80) with the actuation of the tail line apficadQr device (50) responsible for deposit the tail lines (C2 on the first or second polygonal tubular body (1, 2)

17, Polygonal drum that includes:

a first hollow polygonal tubular body (1) constituted of corrugated sheet material and provided with two mouths and a first wall (6) endowing it with an even number of flat faces (7) greater than four defined between corner areas (8), defining said first stop {ø) a first ex-dawn (8a) accessible from the outside of the first polygonal tubular body (i) _f a first intrados (6b) accessible from the hollow interior of the first polygonal tubular house (1) and a first axis ( El) defined in the center of the first hollow polygonal tubular body (1) through the two mouths;

»A base body (3) provided with a polygonal bottom (4) surrounded by a base wall (5): polygonal perpendicular thereto, the polygonal base wall (5) having the same number of sides as the first polygonal tubular body (i) and defining a base extruder (5a) accessible from the outside of the base body (3) and a base intrados (5b) accessible from the inside of the base body (3);

a lower end portion of the first extrados (6a) of the first polygonal tubular body (1) joined to the base intrados (5b) of the polygonal base wall (5) of the base body (3) by tail lines (€ 1) ) forming a polygonal drum;

characterized in that the drum further includes; «A second hollow polygonal tubular body (2) inserted snugly inside the first polygonal tubular body (1), the second polygonal tubular body (2) consisting of: corrugated sheet material and provided with two mouths and a second wall (9) ) equipped with the same even number of faces (7) flat as the first polygonal tubular body (1), defined between corner areas (8). said second wall (9) defining a second extrados (9a) facing and adjacent to the first intrados (6b) of the first polygonal tubular body (1), and a second intrados (9b) accessible from the hollow interior of the second polygonal tubular body (2) ) and a second axis (E2) defined in the center of the second hollow polygonal tubular body (2) crossing the two mouths, the cross section of the second extrados (9a) being of a complementary shape and size with the cross section of! first intrados (6b) of the first polygonal tubular body (1):

the second extrados (9a) being adhered to the first intrados (6b) by lines of col (C29 parallel to the first axis (El) or to the second axis (E2).

18. Bottle according to claim 16 wherein the tail lines (G1 G2) combine lines of cold glue and lines of hot glue,

one . Drum according to claim 17 or 18 wherein the second extrados (9a) is adhered to the first intrados (8b) by at least one line of tail (C2) parallel to the first axis (El) on each of the flat faces (7).

20. Drum according to claims 17, 18 or 19 wherein the infenor end portion of the first extrados (6a) of the first polygonal tubular body (1) is attached to the base intimaaos (5b) of the polygonal base wall (5) of the body of base (3) by lines of ^¬ fall (G1) perpendicular and / or forming an inclined angle with respect to the tail lines (C2) that adhere the first intrados (6b) of the first polygonal tubular body (i) to the second extrados (9a) of the second polygonal tubular body (2).