ES1275214U - Reinforced watertight box (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Reinforced watertight box, for transporting and storing hot-poured products with a viscous nature, which solidify with the drop in temperature, where the box is configured from a die-cut flat laminar body (1) and comprises a lower base (2), two first laterals (3), two second laterals (4) alternate to the previous ones and of a smaller width, and a connection area (5) between each first and second lateral (3, 4), all of them joined by lines of bending (6) for its subsequent assembly by folding, such that in the assembled position it has an open upper mouth (7) and the connection area (5) is folded on the first side (3); where the laminar body (1) is formed of corrugated cardboard with at least a first flat layer (8), a corrugated intermediate layer (9) and a second flat layer (10) that in the assembled position is oriented towards the interior of the box, characterized by comprising - means for non-sticking the product when cold, on the surface in contact with the product; - Means of structural reinforcement of the box formed by the first and second sides (3, 4) that have an isosceles trapezoid shape, such that in an armed position the dimensions of the width and length of the lower base (2) of the box are greater than those of the upper mouth (7); where the first sides (3) present at their free end a first flap (13) joined thereto by two parallel folding lines (6) with a gap between them, such that in the armed position, each first flap (13) is bent outwards and said space between the fold lines (6) forms an upper support surface (15) and a lower zone (16) for adjusting the connection area (5), and; - Means for fixing the armed position, formed by at least one anchoring flange (17) stamped into the first flap (13), the contour of which is formed by a broken polygonal line provided with two intermediate vertices of such dimensions that allow its it fits into a slot (18) located in the area of the connection area (5) facing the outside of the box in the assembled position. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Reinforced watertight box

Technical field of the invention

The present invention corresponds to the technical field of means for the transport and storage of hot-poured products with a viscous nature and that solidify with the drop in temperature, specifically to a reinforced watertight box, configured from a flat laminar body stamped with an open upper base and a connection area between the adjacent sides, which in the assembled position of the box is folded over the first side.

Background of the Invention

At present there are a great variety of products that are worked hot due to the viscosity that they present in those temperature conditions and that, later, when it is lowered, lose this viscosity that makes them manageable and even solidify. These materials can be adhesives, vegetable or animal fats, foods such as honey and fruit concentrates or gelatins, or industrial products derived from petroleum, such as bitumen.

In the specific case of bituminous materials, they are solid or viscous substances, which are softened by heat and include both those obtained from crude oil and those obtained by the destructive distillation of substances of carbonaceous origin. These products are worked hot, at temperatures of around 200 ° C. Its main application is in construction, roads, parks, building-terraces, and public works in general, and they are usually transported in tanker trucks when the quantities are important, but for minor applications they can be packaged in other alternative formats for better and more effective maneuverability and subsequent use of them.

There are different types of packaging for this type of products that try to solve the packaging and transport of these products for the case, that is, when it comes to smaller quantities.

A first type of container corresponds to the type of rigid packaging. Thus, the main rigid storage system for bitumen and other materials with similar technical characteristics today is made up of metal drums. The high capacity of metal to transmit heat for dissipation, as well as its high combustion and diffusion temperature make them one of the most suitable materials for this.

However, its high cost and weight are destined for the packaging of high or medium quantities, from truck tanks, to drums of approximate dimensions around one meter in height and half a meter in diameter.

A second type is flexible packaging. In this case, there are different packaging systems focused on bitumen and other materials with similar technical characteristics. All of them are made of plastic or laminated multilayers.

The packaging systems developed are normally designed for high bitumen loads intended to improve business-to-business logistics, known as B2B, eliminating the need to heat and cool the product in the different logistics transshipments, trucks, ships, etc. The different developments are based on polymeric compounds, normally based on polypropylene and layers of polyethylene inside. They are presented in a format similar to large bags, with capacities from 300 kg to 1,000 kg. There are different developments in this regard, all based on polymers.

This type of flexible packaging can also be used for smaller volumes. For this, smaller packaging sizes are used which, like the previous cases mentioned, are mainly based on polymeric compounds. None of the flexible solutions for end use are capable of being directly palletized once they have been packed. All of them require an intermediate cooling process between packaging and palletizing, where it is necessary to leave them for approximately one day and at a distance from each other, to avoid overheating and combustion. Its manufacturing material is low-resistance plastic compounds, which makes them very sensitive to temperature, and in some cases it is even recommended to avoid their use in hot areas of the planet.

An example of this type of packaging is polymer plastic bags with a capacity of 32 kilos for bitumen. This typology is much finer than the previous ones aimed at improving logistics, so it is recommended not to sell it in areas where reach temperatures above 32 ° C due to the degradation they suffer and therefore the deterioration of the bituminous product.

Finally, there is another type of flexible packaging system consisting of multilayer and multimaterial packaging, with a capacity of 25 kilos. The packaging is made up of layers of plasticized paper that make up bags of this material. This type of container presents problems in its sealing and closure and, like the previous typologies, it is not possible to store it by stacking it on a pallet without an intermediate phase of cooling the bitumen. Thus, once the bitumen has been packaged, the bags must be placed in a cool space and with a perimeter distance of one meter between them to avoid heat breakage. After 24 hours and when the product has cooled down, it is palletized for transport. In addition, as it is a multilayer product, it presents difficulties in its recycling, generating a complex management of it, since it cannot be located in the blue container.

There is a final type of packaging for these small volumes, consisting of watertight cardboard boxes or containers. As an example of the state of the art, reference document EP2384987 can be mentioned in which a container for filling with hot bitumen and stored cold bitumen is defined, consisting of silicone cardboard on its side facing the bitumen and stabilizing against the pressure of its contents on the side walls by at least one strap band that extends vertically around the container. Furthermore, a container formed by adjacently arranged containers has a horizontal circumferential strap band to provide stability.

This container is not easy to assemble because at the end of the process it requires stapling or sealing. On the other hand, in this solution, the container thus defined requires vertical rings to give stability to each of the containers individually. In addition, these rings will be used to lift the container by means of a forklift.

This type of container or box, thus constituted, does not present sufficient resistance to deformation, therefore, to maintain dimensional stability, overcoming deformations due to the pressures exerted by the hot product, it is necessary that the containers have a horizontal strap that ties the set of containers that are stored together in a transport unit, such as a pallet.

Therefore, this solution requires external elements that provide stability to the container, to withstand pressures and high temperatures and to ensure control of deformations. For this reason, it is also necessary to allow a certain time for the product to cool down, before stacking the containers on more than one floor on a pallet.

Another problem with this container is that it replaces one of the flat faces of the corrugated cardboard with a silicone paper. This silicone paper is necessary to provide anti-adherence properties to the container, which allow its separation from the solidified product. In this solution, the silicone paper replaces the inner face of the corrugated cardboard, so in the end we will have a double cardboard with a flat outer layer, a corrugated middle layer and the inner layer that will be the silicone paper. With this configuration, the final resistance of the product is insufficient for the intended function and this packaging requires external elements to increase stability.

These external elements increase the times of the process and complicate the release of the product. Of course, the unit costs are also expensive.

It is necessary to find a container that presents anti-adherence characteristics without this being in exchange for subtracting its resistance to deformation, thus avoiding the need to add external elements. In addition, the container must allow stacking during the pouring and cooling process itself, withstanding the high temperatures in optimal resistance conditions.

Description of the invention

The reinforced watertight box presented here, for transporting and storing hot-poured products with a viscous nature, which solidify with the drop in temperature, is configured from a die-cut flat laminar body and comprises a lower base, two first sides, two second laterals alternate to the previous ones and of a smaller width, and a connection area between each first and second lateral.

All these parts of the box are joined by folding lines for subsequent assembly by folding, such that in the assembled position it has an open upper mouth and the connection area is folded on the first side.

Said box comprises means for anti-adhesion of the cold product on the surface in contact with the product, means for structural reinforcement of the box and means for fixing the assembled position.

The laminar body of this box is formed by corrugated cardboard with at least a first flat layer, a corrugated intermediate layer and a second flat layer which in the assembled position of the box is oriented towards the inside of the box.

The structural reinforcement means of the box are formed by the first and second sides that have an isosceles trapezium shape, such that in a mounted position the width and length dimensions of the lower base of the box are greater than those of the upper mouth. . Thus, the box in the assembled position assumes a frusto-pyramidal shape with the lower surface larger than the upper one.

Each one of the first sides has at its free end a first flap joined to it by means of two parallel fold lines with a gap between them, such that, in the position of assembly of the box, each first flap is folded towards the exterior and said space between fold lines, forms an upper support surface and a lower zone for adjusting the connection area.

For its part, the means for fixing the assembled position of the box are formed by at least one anchoring tab stamped on the first flap, the contour of which is formed by a broken polygonal line of a dimension such that it can be fitted in a groove. located in the area of the connection area facing the outside of the box in the assembled position.

With the reinforced watertight box proposed here, a significant improvement of the state of the art is obtained.

This is so because a more resistant corrugated cardboard box is achieved, with the ability to withstand temperatures above 200 ° C. It is able to withstand these temperatures without combustion and without suffering deformations in the container derived from the heat and the weight of the product.

Therefore, this container has the ability to pack the bituminous product allowing it to cool during the shaping of a pallet, without suffering from combustion or physical deterioration. either by compression, bending or temperature. Therefore, this allows a significant reduction in times, since the process of palletizing and stacking in heights can be carried out without waiting for the product to cool down. To help with this functionality, the boxes are positioned on the pallet in a certain way that favors air circulation and heat dissipation.

The assembly of this box is very simple, and does not require gluing or stapling, nor does it require any external binding element, which reduces time and greatly simplifies the process.

Thanks to the truncated pyramidal shape of the box, the resistance to deformation of the box is significantly increased, since as the base is larger, it improves the compressive strength of the box and allows a stacking of several full boxes, in various heights, preferably up to five heights. All this without the need for external reinforcement elements.

It is important to note that although the present invention reduces the deformation of the box by improving the mechanical properties of the cardboard, it can still be slightly deformed. The truncated pyramidal shape makes it possible that, when the upper part or mouth is deformed, it is not greater than the base and prevents the upper boxes from engaging on the lower ones in the stacking of the same after filling.

In addition, the box has non-stick properties with respect to the cold product, which allow a clean and quick removal from the container. This property can be achieved in several ways in this package, highlighting the one in which the non-stick paper adheres to the innermost layer of the box, the corrugated cardboard being with a minimum number of three layers.

This means that to said double corrugated cardboard (of three papers) the adhesive and the release paper are added. The adhesive is evenly distributed over the entire surface of the inner layer of the cardboard and binds to the fibers of the release paper, thus providing significant additional strength.

If it is also carried out using the lamination technique, the mechanical properties of the cardboard are further improved, since the resistance to compression, the resistance to deformation of the walls due to the internal pressure of the product and the performance of the cardboard are improved, all of this. without significantly increasing the mechanical characteristics of the component papers (which would lead us to increase the cost of the product and make assembly difficult due to excessive rigidity of the materials). Therefore, in addition to the characteristic shape of the box, this configuration of the anti-adherence means also contributes to improving the resistance of the box to deformations.

To improve the mechanical characteristics of a packaging (resistance to vertical compression and wall deformation), the characteristics of the component papers can be improved, but this has a direct impact on the cost of the product and makes it difficult to “manually” assemble the box. . With the solution proposed in the present invention based on lamination, a balance is achieved between resistance, cost and ease of assembly, by not having to use more papers or with better characteristics. Thus, with this system, a cardboard with the minimum thickness required depending on the type of product it contains can be used, since with that minimum grammage, correct behavior of the cardboard will be achieved.

Therefore, it is an easy-to-assemble box that allows a correct and adequate resistance to compression and deformation, without the need for external elements, only by means of a material and a certain shape of the same, also achieving correct non-stick properties of the cold product.

Brief description of the drawings

In order to help a better understanding of the characteristics of the invention, according to a preferred example of a practical embodiment thereof, a series of drawings is provided as an integral part of said description, where, with an illustrative and non-limiting nature, it has been provided represented the following:

Figures 1.1 and 1.2.- Show plan views and a section of the laminar body of the reinforced watertight box, for a preferred embodiment of the invention.

Figure 2.- Shows a perspective view of the laminar body of the reinforced watertight box once assembled, for a preferred embodiment of the invention.

Figure 3.- Shows a detailed view of the anchoring flange of the reinforced watertight box, for a preferred embodiment of the invention.

Figure 4.- Shows a perspective view of a first floor of boxes on a pallet, prepared for stacking on them, for a preferred embodiment of the invention.

Detailed description of a preferred embodiment of the invention

In view of the figures provided, it can be seen how, in a preferred embodiment of the invention, the reinforced watertight box proposed here for the transport and storage of hot-poured products with a viscous nature, which solidify with the drop in temperature , is configured from a die-cut flat laminar body (1) and comprises a lower base (2), two first sides (3), two second sides (4) alternate to the previous ones and of a smaller width, and an area of connection (5) between each first and second side (3, 4), all of them joined by folding lines (6) for subsequent assembly by folding.

In the assembled position, as shown in Figure 2, the box has an open upper mouth (7) and the connection area (5) is folded over the first side (3) on its external face.

This box comprises non-stick means for the cold product, on the surface in contact with the product, and the laminar body (1) is formed by double corrugated cardboard with at least a first flat layer (8), an intermediate layer (9) corrugated and a second flat layer (10) which, in the assembled position, faces the inside of the box.

In a preferred embodiment of the invention, as shown in Figure 1.2, the laminar body (1) comprises a first and a second flat layer (8, 10) and a corrugated intermediate layer (9). The non-stick means of the product comprise a non-stick sheet of paper (11) arranged on the second flat layer (10), by means of joining means formed by a layer of adhesive material (12) between the second flat layer (10) and said non-stick sheet of paper (11), to hold it. The means of application of these non-stick means are formed by a lamination.

By joining the non-stick sheet of paper (11) by means of a lamination, multiple advantages are achieved with respect to other means of application. Thus, the mechanical properties of the corrugated cardboard sheet body (1) are improved in various ways.

In the first place, the compressive strength is improved, according to the edge crush test, or Edge Crush Test (ECT) and, secondly, the deformation of the walls of the box is also improved by the internal pressure exerted by the product that it contains, according to the Mullen test (Mullen Test or Bursting Strength Test).

These improvements are achieved thanks to the lamination technique, which improves the compressive strength, the resistance to deformation of the walls due to the internal pressure of the product and the performance of the cardboard without significantly increasing the mechanical characteristics of the component papers. To improve the mechanical characteristics of a packaging, the obvious solution is to improve the characteristics of the component papers, but this has a direct impact on the cost of the product and makes it difficult to "manually" assemble the box. With the solution proposed in the present invention based on lamination, a balance is achieved between resistance, cost and ease of assembly, by not having to use more papers or with better characteristics. Thus, with this system, a cardboard with the minimum thickness required depending on the type of product it contains can be used, since with that minimum grammage, correct behavior of the cardboard will be achieved.

In other embodiments, the laminar body (1) comprises between the corrugated intermediate layer (9) and the flat second layer (10), an additional flat layer and an additional corrugated intermediate layer, interspersed with the previous ones. In this way, the cardboard would have a double-double structure, that is, with five layers or five papers.

In this case, given that the performance is increased by the application by lamination of the non-stick paper, it is possible that the five-layer cardboard has the minimum grammage required for a given product, so that it is not necessary to increase the thickness of the body (1) Laminate, allowing even five-ply cardboard or papers to be easily assembled without folding complications.

In other preferred embodiments, the non-stick means of the product are formed by an emulsion of non-stick material on the second flat layer (10). In this case, the emulsion is applied during the cardboard manufacturing or "converting" process, such as in the corrugating machine.

Likewise, in other embodiments, said non-stick means of the product are formed by the second layer (10) of the laminar body itself, where said second Layer (10) is formed by a non-stick sheet of paper. In this case, this layer of release paper can also be applied in the corrugating machine.

In the embodiment proposed here, the non-stick paper sheet (11) is formed by a silicone paper, but in other embodiments it may be formed by a polyethylene terephthalate paper.

This box also comprises reinforcing means of the shape thereof, formed by the first and second sides (3, 4) that have an isosceles trapezium shape, such that in an assembled position the dimensions of the width and length of the lower base (2) of the box are larger than those of the upper mouth (7).

This shape of the first and second laterals (3, 4) gives the box a truncated pyramidal shape and precisely, that greater dimension of the lower base (2) with respect to the upper mouth (7), provides it with additional resistance to compression to the box, allowing the palletizing and stacking of the same, as shown in Figure 4, in which a first floor of boxes can be seen with a common lid (21) on them for greater security, prepared for the placement of a new floor of boxes on them. This palletizing and stacking is done even without the product having cooled down, significantly reducing lead times.

As can be seen in Figures 1.1 and 2, the first sides (3) have at their free end a first flap (13) joined to it by means of two parallel fold lines (6) with a gap between them, such that in In the armed position, each first flap (13) is bent outwards and said gap forms an upper support surface (15) and a lower zone (16) for adjusting the connection area (5).

Likewise, this box comprises fixing means of the assembled position, formed by at least one anchoring flange (17) stamped in the first flap (13), the contour of which is formed by a broken polygonal line of a dimension such that it can be fitted in a groove (18) located in the area of the connection area (5) facing the outside of the box in the assembled position, as shown in Figures 1 and 3. The special configuration of said anchoring flange (17) provided with two intermediate vertices whose separation from each other is greater than the length of the slot (18), once they have been introduced into the slot, they remain strongly anchored, resisting tensile stresses.

In this preferred embodiment of the invention, the fixing means also comprise an additional central flange (19) in the area of attachment of the anchoring flange (17) to the first flap (13), which is stamped to be actuated in the opposite direction to said anchoring flange (17), to anchor the anchoring flange (17) in the opposite direction, thus preventing it from coming out of the slot (8) when reverse tractions are exerted on the box due to the pressure of the inner product . Therefore, by means of the combination of the two flanges (17 and 19), a reinforced security anchor is generated that is resistant to traction in any direction and that allows to dispense with other types of reinforcement devices such as strips, seals or staples.

According to another aspect, in this preferred embodiment, as can be seen in Figures 1.1 and 3, each second side (4) extends into a second flap (20) joined to it by means of a fold line (6), such that In the assembled position of the box the second flap (20) is folded towards the outside of the box.

The first flaps (13) have a length equal to the width of the free end of the first side (3) and the second flaps (20) have a length greater than the width of the free end of the second side (4), such that said second flaps (20) comprise respective extensions (14) joined to the adjacent connection area (5) and to the second flaps (20) by fold lines (6) such that in an armed position of the box, the extensions (14) are folded and fitted in the lower adjustment zone (16) of the first flap (13).

The described embodiment constitutes only an example of the present invention, therefore, the specific details, terms and phrases used in the present specification are not to be considered as limiting, but are to be understood only as a basis for the claims and as a representative basis that provides an understandable description, as well as sufficient information to the person skilled in the art to apply the present invention.

Claims (1)

- Reinforced watertight box, for transport and storage of hot-poured products with a viscous nature, which solidify with the drop in temperature, where the box is configured from a die-cut flat laminar body (1) and comprises a lower base (2) , two first laterals (3), two second laterals (4) alternate to the previous ones and of a smaller width, and a connection area (5) between each first and second lateral (3, 4), all of them joined by lines of folded (6) for subsequent assembly by folding, such that in the assembled position it has an open upper mouth (7) and the connection area (5) is folded on the first side (3); where the laminar body (1) is formed by corrugated cardboard with at least a first flat layer (8), a corrugated intermediate layer (9) and a second flat layer (10) that in the assembled position is oriented towards the inside of the box, characterized by comprising - means for non-sticking the product when cold, on the surface in contact with the product; - Means for structural reinforcement of the box formed by the first and second sides (3, 4) that are in the shape of an isosceles trapezoid, such that in an armed position the dimensions of the width and length of the lower base (2) of the box are greater than those of the upper mouth (7); where the first sides (3) have at their free end a first flap (13) joined thereto by two parallel folding lines (6) with a gap between them, such that in the armed position, each first flap (13 ) is bent outwards and said space between the fold lines (6) forms an upper support surface (15) and a lower zone (16) for adjusting the connection area (5), and; - Means for fixing the armed position, formed by at least one anchor flange (17) stamped on the first flap (13), the contour of which is formed by a broken polygonal line provided with two intermediate vertices of such dimensions that allow its it fits into a slot (18) located in the area of the connection area (5) facing the outside of the box in the assembled position. - Reinforced watertight box, according to claim 1, characterized in that the non-stick means of the product comprise a non-stick sheet of paper (11) arranged on the second flat layer (10), by means of joining means formed by a layer of adhesive material (12) between the second flat layer (10) and said sheet of non-stick paper (11), where the means of application of the non-stick means consist of a lamination. - Reinforced watertight box, according to claim 1, characterized in that the non-stick means of the product are formed by an emulsion of non-stick material applied on the second flat layer (10). - Reinforced watertight box, according to claim 1, characterized in that the non-stick means of the product are formed by the second layer (10) of the laminar body, where said second layer is formed by a non-stick paper sheet. - Reinforced watertight box, according to any one of the preceding claims, characterized in that the laminar body (1) comprises, sandwiched between the corrugated Intermediate layer (9) and the second flat layer (10) facing inwards, an additional flat layer and an additional corrugated interlayer. - Reinforced watertight box, according to any of claims 2 or 4, characterized in that the non-stick paper sheet is formed by a silicone paper. - Reinforced watertight box, according to any of claims 2 or 4, characterized in that the non-stick paper sheet is formed by a polyethylene terephthalate paper. - Reinforced watertight box, according to any of the preceding claims, characterized in that the fixing means comprise an additional central flange (19) in the area of attachment of the anchoring flange (17) to the first flap (13), which is stamped to be operated in the opposite direction to said anchoring flange (17). - Reinforced watertight box, according to any of the preceding claims, characterized in that each second side (4) extends into a second flap (20) attached to it by means of a folding line (6), such that in the armed position of the box the second flap (20) is folded towards the outside of the box. 0- Reinforced watertight box, according to any of the preceding claims, characterized in that the first flaps (13) have a length equal to the width of the free end of the first side (3) and the second flaps (20) have a length greater than the width of the free end of the second side (4), such that said second flaps (20) comprise respective extensions (14) joined to the adjacent connection area (5) and to the second flaps (20) by fold lines ( 6) such that in an assembled position the box is folded and fitted in the lower adjustment zone (16) of the first flap (13).