Board for water sports or leisure and method for manufacturing a board for water sports or leisure

Abstract

The present invention relates to a board for water sports or leisure (100), comprising: a main body (110) comprising a plurality of couplable segments (111), which can be coupled together by means of coupling members (120); at least one upper flat closure (130) coupled to an upper face of the main body (110); at least one lower flat closure (140) coupled to a lower face of the main body (110); at least one pressure release valve (150); and at least one support means (160); wherein the couplable segments (111) comprise at least one first segment (111-1), at least one nth or last segment (111-n) and a plurality of intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) arranged between the first segment (111-1) and the last segment (111-n). The present invention also relates to a method for manufacturing a board (100) according to the invention.

Description

BOARD FOR WATER SPORTS OR LEISURE AND MANUFACTURING PROCESS OF A BOARD FOR WATER SPORTS OR LEISURE

[0001] This patent application claims internal priority over process BR 20 2024 016195 0, filed on 08 / 08 / 2024, pursuant to Law No. 9 9.279, of May 14, 1996. Technical Field

[0002] The present invention belongs to the field of body support devices specially adapted for aquatic sports or leisure, swimming structures and propulsion devices powered by muscle force, more specifically boards for aquatic sports or leisure and processes for manufacturing boards for aquatic sports or leisure. Introduction

[0003] The present invention relates to a board for water sports or leisure, wherein the board comprises: a main body comprising a plurality of attachable segments, attachable to each other by means of fittings; at least one upper flat closure; at least one lower flat closure; at least one pressure release valve; and at least one support means.

[0004] The present invention also relates to a process for manufacturing a board for water sports or leisure. Fundamentals

[0005] Surfboards as we know them today are basically equipment used to practice activities on waves or in the water, whether for competitive sports or leisure. They consist of a lightweight but resistant structure, usually composed of a polystyrene or polyurethane foam core, which is coated with layers of fiberglass or carbon fiber embedded in resin, forming a rigid and durable shell.

[0006] The design of these boards varies according to the sport or the user's experience level, including specific shapes such as longboards, shortboards, funboards, stand-up paddleboards (SUP), windsurf boards, or kitesurf boards, each designed to optimize performance, stability, speed, and maneuverability in different water and wave conditions. Beyond traditional surfing, these boards are used in various recreational water activities where the goal is to glide on waves, maintain balance, or navigate the water with greater comfort and safety. The materials and shapes of the boards have evolved considerably, incorporating modern technologies and sustainability principles, and offering a variety of sizes, styles, and functions to cater to beginners, professional athletes, and water sports enthusiasts.

[0007] Boards designed for water sports or leisure, such as surfing, stand-up paddleboarding (SUP), windsurfing, and kitesurfing, involve significant advancements in materials, design, hydrodynamics, and sustainability. In terms of materials, the use of resins like epoxy and polyester provides both hardness and flexibility, with epoxy being particularly popular due to its lightness and strength. Carbon fiber is also widely used to make boards lighter and increase torsional rigidity, which is especially valuable in larger waves. Additionally, expanded polystyrene (EPS) foams are chosen for their lightness and excellent buoyancy, common in epoxy boards.

[0008] The design and hydrodynamics of modern surfboards are highly influenced by 3D modeling technologies, which allow for the creation of customized shapes, optimizing performance for different types of waves and surfing styles. Features such as rocker (the curve of the board) and concave design (concave, channels on the bottom) are fundamental for better maneuverability and speed. Modifications such as wings and rails... They are also designed to improve control on tight turns, providing more precise movements.

[0009] Technology and innovation in surfboards include the integration of sensors that analyze performance, speed, and movements, connecting data to mobile apps for a more informed experience. Another innovation is the use of hydrofoils (submerged fins) that allow the board to rise above the water, reducing friction and increasing speed and stability. In terms of sustainability, there is a growing effort to use renewable materials, such as bamboo and bio-resins, with the aim of minimizing environmental impact. Furthermore, there are initiatives focused on recycling surfboards, either by transforming them into new products or reintegrating the materials into the production cycle.

[0010] Customization and accessibility have also evolved. Technologies such as 3D printers and CNC machines are being used to create custom-made surfboards on a large scale, adapted to the specific preferences of each user. The variety of models available on the market has grown significantly, offering more stable options for beginners, as well as more agile models for experienced surfers. These advances are transforming the water sports experience, offering surfboards that are not only more efficient in terms of performance, but also more environmentally friendly and customizable, catering to a diverse audience.

[0011] The manufacturing of surfboards for water sports or leisure is a process that combines art, science, and technology, resulting in products that are both functional and aesthetically pleasing. It all begins with the selection of the foam, usually expanded polystyrene (EPS) or polyurethane, which forms the core of the board. This block is carefully sculpted to achieve the desired shape using CNC machines or manually by a craftsman. Shaper design involves precise adjustments to determine the rocker, the curvature of the board, and the inclusion of features such as concas on the bottom to improve performance in the water.

[0012] After shaping, the board undergoes a lamination process, where it is covered with fiberglass fabric soaked in resin, usually epoxy or polyester. This process adds strength and rigidity to the structure, allowing it to withstand the pressures of use in water sports. The choice between epoxy and polyester resin depends on the type of board and performance preferences, with epoxy being preferred for its lightness and superior durability.

[0013] Once the lamination is complete and the resin has hardened, the board is sanded to create a smooth, aerodynamic surface. This finish is not only aesthetic but crucial for reducing friction with the water. On custom boards, the finish may include detailed graphics and a variety of colors, applied with specific paints that are resistant to water and sunlight. The final step involves the installation of accessories such as fins, leash, and occasionally, inserts for attaching masts or handles on windsurf or SUP boards.

[0014] Each of these steps requires meticulousness, as impacts on the final product quality can affect the board's performance and durability. Furthermore, the industry has been moving towards more sustainable practices, incorporating renewable materials and processes that minimize waste and reduce the carbon footprint. With each board manufactured, the fusion of innovative design and traditional skills results in ingenious pieces of sporting equipment that continue to evolve with technological and ecological demands.

[0015] Therefore, boards for water sports or leisure traditionally present significant limitations related to the process. Manufacturing, structural performance, and environmental impact are all factors to consider. Conventional production methods use polystyrene or polyurethane cores, which generate significant material waste during machining, and rely on lamination with fiberglass and excess resin, resulting in toxic waste that contaminates the environment. Additionally, boards manufactured using these methods have limitations in terms of structural strength and durability, especially under conditions of intensive use or variations in pressure and temperature.

[0016] Another problem challenging surfboard manufacturers is the difficulty of customizing and adapting boards to the specific needs of users, due to reliance on conventional molding or machining processes. Furthermore, existing solutions using 3D printing face challenges related to the high cost of equipment and the complexity of manufacturing large and robust structures, such as surfboards.

[0017] The present invention overcomes these limitations by introducing a surfboard for water sports or leisure and an innovative manufacturing process that uses 3D printing with PETG filament to create an internal honeycomb-type structure composed of interconnected hollow hexagonal cells. This configuration provides greater structural strength. Furthermore, the surfboard is segmented into interlocking modules, allowing assembly and disassembly without the need for tools or additional fasteners, which facilitates customization and maintenance. The manufacturing process of the surfboard blank using 3D printing enables the use of more environmentally friendly materials, in addition to reducing material waste. Previously, polystyrene blocks were machined (subtractive manufacturing) to obtain the surfboard design, and now, with 3D printing, it is possible to add material precisely. at the points where it's needed (additive manufacturing).

[0018] The solution also incorporates laser-cut PETG outer panels, which are bonded to the main body using a reduced amount of epoxy resin, forming a resistant and watertight surface lamination. To handle internal pressure variations and prevent water infiltration, the board is equipped with a pressure equalization valve communicating with the internal cavities of the structure. The manufacturing process includes digital modeling, 3D printing, laser cutting, vacuum lamination, and surface finishing, ensuring efficiency, sustainability, and superior quality.

[0019] In this way, the invention not only improves the performance and durability of the boards, but also significantly reduces the environmental impact and manufacturing time, offering an innovative and affordable solution for the water sports and leisure market.

[0020] The section above provides context information relating to this disclosure, which should not necessarily be considered as being understood as being prior to the art. State of the art

[0021] In the current state of the art, there are several solutions for manufacturing boards for water sports or nature-based leisure activities discussed here.

[0022] An example is the Brazilian patent document BR112020015577, which discloses and describes a floating board for water sports, with a preferably inflatable or foam core, glued or fitted side parts, an air inflation valve, an outer plastic or laminate coating, lower skids, and an articulated attachment section for coupling to a watercraft. Although BR112020015577 presents a solution with an acceptable end result, the document uses The Brazilian patent application BR112020015577 does not describe an inflatable or foam core, assembly by gluing or conventional snap-fit, and a valve only for air inflation, failing to describe a board with a segmented body, nor 3D printing for manufacturing the segments, nor the use of PETG sheets, nor an internal honeycomb structure with communication holes. Furthermore, BR112020015577 does not provide for snap-fit ​​assembly, nor laser-cut external PETG sheets, nor a pressure equalization valve for a rigid structure.

[0023] Another relevant prior art document is the European patent document EP3487703B1, which discloses and describes a board for water sports, such as surfboards, featuring an inner core reinforced by a honeycomb (hexagonal) structure and / or recesses, which may be filled with thermoplastic materials or foams. The core is coated with outer layers of fibers (such as fiberglass or carbon fiber) impregnated with resin, forming a rigid lamination. The manufacturing process may involve molding, pressing, and conventional lamination, aiming to increase structural strength, reduce weight, and improve board performance. However, document EP3487703B1 does not describe segmented manufacturing, 3D printing, snap-fit ​​assembly, the use of PETG as the main material, or a pressure equalization valve.

[0024] Yet another document to be cited is patent document US11377176, which discloses and describes a monolithic body (generally made of foam) with superficial hexagonal indentations, obtained by molding or machining, not revealing or suggesting, therefore, a three-dimensional honeycomb-type internal structure composed of multiple attachable segments, each individually 3D printed in PETG, forming a modular and integrally hollow core, with communication holes between cells. US11377176 also does not provide for any modular assembly system or male-female type fitting that would allow the joining of segments and outer plates exclusively by fitting without the use of glues, screws or other fasteners, which would allow assembly and disassembly without damage. Furthermore, US11377176 uses generic plastics, preferably foams, and does not mention PETG or laser-cut outer plates. US11377176 also does not mention or suggest communication holes between the cells of its structure that would allow the circulation of air and resin, which would favor structural homogeneity and lamination, nor does it refer to any type of pressure equalization valve, such as a pressure relief valve communicating with the interior of the main body, configured to equalize internal pressure and prevent water infiltration, even under variations in ambient temperature and pressure.In addition to these disadvantages, US11377176 uses conventional molding or machining processes, without making reference, for example, to additive manufacturing or to the reduction of discarded material during the board / internal structure design process.

[0025] Another relevant prior art document is the French patent document FR3121655B1, which discloses and describes a rigid aquatic float (surfboard) with a hollow and perforated internal skeleton, produced by additive manufacturing (3D printing) of geometrically connected plastic filaments, with vacuum lamination and bonding of at least one composite fiber and resin plate around the skeleton, forming an outer shell, and application of successive layers of fiber and resin for reinforcement. However, FR3121655B1 does not mention segmented assembly, interlocking, use of PETG, laser-cut outer plates, or a pressure equalization valve. Furthermore, the document describes a skeleton printed in... A single, non-segmented piece, in which its outer layers are composed of fiber and resin, not PETG.

[0026] As can be inferred from the description above, there is therefore room for a solution for boards for water sports or leisure and a process for their manufacture that overcomes the shortcomings of the state of the art, especially for a solution that includes: a board with a main body segmented into multiple attachable modules, each individually 3D printed with PETG; an internal honeycomb-type structure with interconnected hollow cells and communication holes between walls; assembly of the segments and outer plates exclusively by fitting, without the use of glues, screws or other conventional fasteners; the option of lamination using laser-cut flat PETG sheets for the upper and lower faces, adhered with epoxy resin in reduced quantity; insertion of a pressure equalization valve communicating with the interior of the rigid structure, to equalize pressures and prevent water infiltration;and vacuum lamination process and specific surface finish. Objectives of the invention

[0027] The object of the invention is, therefore, to provide a board for water sports or leisure, according to the characteristics of claim 1 of the attached claims.

[0028] Another objective of the invention is to provide a manufacturing process for a board for water sports or leisure, according to the characteristics of claim 16 of the attached claims.

[0029] Yet another objective of the invention is to provide a board for water sports or leisure, according to the characteristics of claim 17 of the attached claims.

[0030] Another objective of the invention is to provide a manufacturing process. of a board for water sports or leisure, according to the characteristics of claim 21 of the attached claims.

[0031] Other features and details of the features are represented by the dependent claims. Description of the figures

[0032] For a better understanding and visualization of the object of the present invention, it will now be described with reference to the attached figures, representing the technical effect obtained through an exemplary embodiment that is not limiting the scope of the present invention, in which, schematically:

[0033] Figure 1: shows a top view of a board for water sports or leisure, according to the invention, representing the transparent top flat closure to highlight the internal structure of the board;

[0034] Figure 2: shows a bottom view of a board for water sports or leisure, according to the invention, representing the transparent bottom flat closure to highlight the internal structure of the board;

[0035] Figure 3: presents an exploded top view of the plank from Figure 1, concealing the top plank closure and highlighting the division of the main body of the plank into a plurality of attachable segments;

[0036] Figure 4: presents a top view of the sheet from Figure 3, highlighting the closures;

[0037] Figure 5: presents a perspective view of detail B from Figure 4, highlighting the male and female portions of the closure;

[0038] Figure 6: presents a perspective view of detail B from Figure 4, highlighting the male and female portions of the closure;

[0039] Figure 7: presents a partially perspective view. Exploded view of the plank in Figure 3, concealing the upper planar closure and highlighting the division of the main body of the plank into a plurality of attachable segments, and showing one of the segments separated from the assembly;

[0040] Figure 8: presents an enlarged front view of section AA from Figure 1, showing the upper and lower closures before their assembly onto the main body (110), with the direction of assembly of the upper and lower closures indicated by arrows;

[0041] Figure 9: shows the front view of Figure 8, highlighting the assembled upper and lower closures.

[0042] Figure 10: shows a top view of a board for water sports or leisure, according to an alternative embodiment of the present invention, representing the transparent top flat closure to highlight the internal structure of the board;

[0043] Figure 11: presents an enlarged front view of section CC from Figure 10, highlighting the upper and lower peripheral recesses of the outer edge of the board, before the assembly of the upper and lower flat plates, with the direction of assembly of the upper and lower flat plates indicated by arrows; and

[0044] Figure 12: shows the front view of Figure 11, highlighting the upper and lower flat plates mounted, respectively, in the upper and lower peripheral recesses of the outer edge of the plank. Detailed description of the invention

[0045] The detailed description below refers to the accompanying drawings in which embodiments of the present invention are represented, by way of illustration and not limitation. These embodiments are described in such a way as to allow a person skilled in the art to reproduce their results. Other embodiments resulting from structural, mechanical, logical, and electrical changes... Electronic and other adaptations are possible and can be implemented without departing from the spirit and scope of the present invention. The detailed description that follows should therefore not be understood in a restrictive or limiting manner.

[0046] The present invention relates to a board for water sports or leisure, or simply a board (100), wherein the board (100) comprises: a main body (110) comprising a plurality of attachable segments (111), attachable to each other by means of fittings (120); at least one upper flat closure (130); at least one lower flat closure (140); at least one pressure release valve (150); and at least one support means (160). The present invention also relates to a process for manufacturing a board (100).

[0047] To facilitate understanding and organize the details of the present invention, the following description will be divided into topics according to the objectives of the invention. Plank (100)

[0048] A board (100) is a floating device designed to support the weight of a user while performing activities on the water, such as surfing, stand-up paddle (SUP), windsurfing or kitesurfing.

[0049] As can be seen in Figures 1 to 4 and 7, the main body (110) is the central structure of the board (100), comprising an outer edge (110-1), wherein the main body (110) is formed by a plurality of attachable segments (111) which, joined together, constitute the structural base of the board (100), wherein the main body (110) is responsible for giving the board (100) its shape, strength and buoyancy, serving as support for the other components, such as the fittings (120), the flat closures (130, 140), the pressure release valve (150) and at least one support means (160).

[0050] The attachable segments (111) are adjacent to each other and form the main body (110), each attachable segment (111) being individually printed in three dimensions from material, preferably, but without limitation to the invention, polymeric. Each attachable segment defines a portion of an internal structure of the honeycomb-type board (100), comprising a multiplicity of polygonal cells (112), wherein each polygonal cell (112) comprises a plurality of walls (112-1) and at least one communication hole (112-2) between adjacent walls (112-1) of adjacent polygonal cells (112), allowing the passage of air and resin between said polygonal cells (111).

[0051] It is noteworthy that the preferred polymeric material, without limiting the invention, is Polyethylene Terephthalate Glycol or PETG, which is a thermoplastic polymer from the polyester family, modified with glycol to provide greater impact resistance, flexibility, and transparency compared to conventional PET. In the context of 3D printing and the manufacture of boards for water sports, PETG stands out for its excellent mechanical strength, dimensional stability, good layer adhesion, resistance to water and chemical agents, as well as being easy to process and exhibiting low moisture absorption. These characteristics make PETG especially suitable for structural applications that require durability, lightness, and performance in harsh environments, such as aquatic environments.

[0052] It should also be noted that the polymeric material for manufacturing the attachable segments (111) of the board (100) can also be any material that presents suitable properties of mechanical resistance, durability, lightness, water resistance and compatibility with 3D printing processes, and can be chosen from ABS (Acrylonitrile Butadiene Styrene), PLA (Polylactic Acid), Nylon (Polyamide or PA), Polycarbonate (PC), Polypropylene (PP), TPU (Thermoplastic Polyurethane), compounds Reinforced materials such as carbon fiber reinforced nylon, glass fiber reinforced PETG, etc., or a combination thereof.

[0053] The main body (110) is divided into attachable segments (111), wherein the attachable segments (111) are dimensioned in such a way as to enable their manufacture by means of additive manufacturing or 3D printing and, especially, in such a way as to enable their manufacture on small or medium-sized 3D printers, making their manufacture more accessible in terms of printing equipment cost and ease of handling and assembly of smaller parts. In addition, the division of the main body (110) into attachable segments (111) takes into account the structural rigidity, dimensional stability, structuring of each of the attachable segments (111) and watertightness of the assembly, to ensure that, when coupled together, they are endowed, individually and as a whole, with characteristics similar to the characteristics of a single board (100), i.e., a board (100) that has not been manufactured in a segmented manner.

[0054] The coupleable segments (111) comprise at least one first segment (111-1) and at least one nth or last segment (111-n), wherein, between the first segment (111-1) and the last segment (111-n), the main body (110) further comprises a plurality of intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9).

[0055] The first segment (111-1) forms the front part of the board (100) and comprises at least one first part of the outer edge (110-111-1), a plurality of polygonal cells (112) and, possibly and / or optionally, at least one front polygonal cell (112-3). The first part of the outer edge (110-111-1) corresponds to the section of the outer edge (110-1) of the main body (110) that partially encloses the first segment (111-1).

[0056] The polygonal cells (112) of the first segment (111-1) preferably comprise, but without limiting the invention, a hexagonal shape, wherein the shape of these cells (112) may vary according to their interface with the first part of the outer edge (110-111-1). The polygonal cells (112) of the first segment (111-1) in the vicinity of the first part of the outer edge (110-111-1) have their geometry altered due to the interruption of their outline by the first part of the outer edge (110-111-1), thus the polygonal cells (112) of the first segment (111-1), in the vicinity of the first part of the outer edge (110-111-1), may have a number of sides or walls (112-1) less than six, wherein at least one of their sides or walls (112-1) is formed by the first part of the outer edge (110-111-1).The polygonal cells (112) closest to the front polygonal cell (112-3) may have larger dimensions than those of the polygonal cells (112), since the first segment (111-1) is a segment that responds to less stress, being at the end of the board (100). Furthermore, the front polygonal cell (112-3) may have a shape different from hexagonal, being, for example, but without limiting the invention, a quadrilateral.

[0057] The nth or last segment (111-n) forms the back part of the plank (100) and comprises at least one nth or last part of the outer edge (110-111-n) and a plurality of polygonal cells (112). The nth part of the outer edge (110-111-n) corresponds to the section of the outer edge (110-1) of the main body (110) that partially encloses the last segment (111-n).

[0058] The last polygonal cells (111-ln) preferably comprise, but without limiting the invention, a hexagonal shape, wherein the shape of these cells (111-ln) may vary according to their interface with the nth part of the outer edge (110-ln).

[0059] The polygonal cells (112) of the last segment (111-1) preferably comprise, but without limiting the invention, a hexagonal shape, wherein the shape of these cells (112) may vary according to their interface with the nth part of the outer edge (110-111-n). The polygonal cells (112) of the last segment (111-1) in the vicinity of the nth part of the outer edge (110-111-n) have their geometry altered due to the interruption of their trace by the nth part of the outer edge (110-111-n), thus the polygonal cells (112) of the first segment (111-1), in the vicinity of the nth part of the outer edge (110-111-n), may have a number of sides or walls (112-1) less than six, in which at least one of its sides or walls (112-1) is formed by the nth part of the outer edge (110-111-n).

[0060] The division of the main body (110) into intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9), as in the case of the first and nth segments (111-1, 111-n), is done in such a way that each of the intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) has dimensions that allow its manufacture in small or medium-sized 3D printers, and in such a way that they result in elements with structural rigidity, dimensional stability, structuring and watertightness of the assembly similar to those of a whole board (100), as described above.

[0061] The intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) form the parts between the front and back of the board (100) and each comprise at least a second, a third, a fourth, a fifth, a sixth, a seventh, an eighth and a ninth part of the outer edge (110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9) and a plurality of polygonal cells (112). The outer edge parts (110-111-2, 110-111-3, 110- 111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9) of the intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) correspond to the sections of the outer edge (110-1) of the main body (110) in the vicinity of the intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9).

[0062] The polygonal cells (112) of the intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) preferably comprise, but without limiting the invention, a hexagonal shape, wherein the shape of these polygonal cells (112) may vary according to their interface with the outer edge parts (110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9) of the intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9).The polygonal cells (112) of the intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) in the vicinity of the outer edge parts (110- 111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9) have their geometry altered due to the interruption of their outline by parts of the outer edge (110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9), thus allowing the polygonal cells (112) of the first segment (111-1), in the vicinity of the nth part of the parts of the outer edge (110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9), having a number of sides or walls (112-1) less than six, wherein at least one of its sides or walls (112-1) is formed, respectively, by at least one of the parts of the outer edge (110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9).

[0063] It should be noted that the number of attachable segments (111) may vary according to the type and dimensions of the board (100), specifications project techniques, technical specifications of the 3D printer to be used, etc. Although the present description describes an example of a board (100) comprising ten attachable segments (111), this number may be greater or less, for example, but without limiting the invention, of only three attachable segments, being a first, an intermediate and an nth segment.

[0064] As can be inferred especially from Figures 4, 5 and 6, the fittings (120) comprise structural elements designed to join the different parts or attachable segments (111) of the main body (110) of the board (100) through the outer edges (110-111-1, 110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9, 110-111-n), wherein the fittings (120) are preferably, but without limiting the invention, male-female type fittings, comprising a male portion (121) and a female portion (122), allowing the joining of the attachable segments (111) of Rigid and detachable design by manual pressure adjustment, without the need for screws, glues or other additional fasteners.

[0065] The male portion (121) comprises a male rod (121-1), comprising at least two protrusions (121-2), wherein the male rod (121-1) extends from the lower part of one end of at least one of the outer edges (110-111-1, 110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9, 110-111-n), while the female portion (122) comprises a female rod (122-1) comprising at least two holes (122-2), wherein the female rod (122-1) extends from the upper part of one end of at least one of the outer edges (110-111-1, 110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9, 110-111-n). The dimensions and geometry of the male rod (121-1) and the female rod (122-1) coincide in such a way that, when connected at least two outer edge ends of adjacent segments, the resulting connection does not alter the geometry of the outer edge (110-1) of the main body (110). The dimensions of the protrusions (121-2) and holes (122-2) are such that they allow the insertion under pressure of the protrusions (121-2) into the holes (122-2).

[0066] It should be noted that, although the male rod (121-1) has been described as extending from a lower part of an end of at least one of the outer edges (110-111-1, 110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9, 110-111-n), the male rod may alternatively extend from an upper part of an end of at least one of the outer edges (110-111-1, 110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9, 110-111-n). The same consideration applies to the female stem (122-1).

[0067] Still within the context of the present invention, the fittings (120) can be arranged at other points on the main body (110), for example, but without limiting the invention, on one or more of the walls (112-1) of polygonal cells (112) of adjacent coupleable segments (111).

[0068] It should also be noted that, in the context of the present invention, it is possible to use suitable alternatives to the use of male-female type fittings (120) for joining the attachable segments of the board (100), which may include: conventional mechanical fasteners such as screws, nuts and washers, clips and / or clamps, fasteners, hooks, tongue and groove type fittings under pressure, snap-fits in general, bayonet type rotational locks and the like; application of chemical adhesives, such as epoxy resin, polyurethane or cyanoacrylate glue and the like; structural glues or adhesives; thermal or ultrasonic welding; magnetic by means of inserting magnets into the attachable segments (111) to promote quick joining and alignment. Automatic, especially in applications involving frequent assembly / disassembly.

[0069] Once the board design (100) is defined, digital modeling of the board shape (100) is performed, defining a three-dimensional internal mesh composed of polygonal cells (112).

[0070] After the digital modeling is performed, a slicing file is generated that subdivides the internal mesh into multiple attachable segments (111) in the form of segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-n), where these attachable segments (111) are equipped with male-female type fittings (120).

[0071] Once this is done, each of the attachable segments (111) is printed, on a 3D printer, in the form of separate segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-n).

[0072] The adjacent segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-n), according to the plank design (100), are then coupled together by means of the fittings (120), for example, but without limiting the invention, the male portion (121) on the left of the intermediate segment number two (111-2) is coupled to the female portion (122) on the left of the first segment (111-1) and the male portion (121) on the right of the intermediate segment number three (111-2) is coupled to the female portion (122) on the right of the first segment (111-1), as represented in Figure 4, the same applying to the other segments.

[0073] In the context of the present invention, 3D printers come in a variety of sizes, ranging from compact and medium-sized models to large industrial equipment. Generally, they are classified according to their maximum print volume, known as build area or build volume, which indicates the maximum space where... They can create objects.

[0074] Small 3D printers typically have build volumes ranging from approximately 100 x 100 x 100 mm to about 300 x 300 x 400 mm, while medium-sized printers allow for build volumes ranging from approximately 200 x 200 x 200 mm to 500 x 500 x 500 mm, enabling the manufacture of parts, prototypes, or components of considerable size, yet still manageable for use in offices, laboratories, or production workshops.

[0075] The upper flat closure (130) and the lower flat closure (140) form a structure or component with a uniform and level surface, generally with dimensions and shape that follow the outer contour of the main body (110) of the board (100) and reduced thickness in relation to its other dimensions.

[0076] In a preferred embodiment of the present invention, the upper flat closure (130) and the lower flat closure (140) each comprise a fiberglass fabric or mat of reduced thickness (130-1, 140-1) which is cut to dimensions and shape suitable for the outer contour of the main body (110), the closures (130, 140) being prepared as will be described in the manufacturing process further on, and stretched over the main body (110) and coupled thereto, wherein the upper flat closure (130) is disposed over and coupled to the upper part of the main body (110-1) while the lower flat closure (140) is disposed over and coupled to the lower part of the main body (110-1), as represented especially in Figures 8 and 9.

[0077] The pressure relief valve (150) is preferably, but without limitation to the invention, a one-way check valve, which allows only the exhaust of gases or water vapor from inside the main body. (110), without allowing water to enter the main body (110). In this way, the pressure relief valve (150) enables the relief of pressure caused, for example, by the heating of condensation water and / or water vapor and / or formed inside the polygonal cells (112) of the main body (110) during prolonged exposure of the board (100) to the sun or high temperatures. The pressure relief valve (150) comprises a movable part, which may be a sphere, disc, pendulum or flap, which is held in the closed position by a spring when there is no internal pressure inside the main body (110) or when the internal pressure inside the main body (110) is less than the spring force of the valve (150). As soon as there is a fluid flow (water and / or gas and / or water vapor) caused by an internal pressure inside the main body (110) greater than the spring tension, the spring will give way and the moving part will move, allowing exhaust, in a manner known from the state of the art.After exhaustion, the pressure release valve (150) closes again, blocking the entry of any fluid from the external environment into the main body (110).

[0078] The support means (160) is any and all constructive element or detail capable of housing, supporting, securing or allowing the installation of one or more accessories or devices commonly used on boards of the nature discussed here, and may be, for example, a valve support (160-1) for the installation of the pressure release valve (150), a hole for attaching the leash (160- 2), which is the cord connecting the board (100) to the user's ankle or hand, a base (160-3) for attaching fins etc.

[0079] In an alternative embodiment of the present invention, as represented especially in Figures 10, 11 and 12, the board (1000) comprises a main body (1110) comprising at least one upper peripheral recess (1110-2) and at least one lower peripheral recess (1110- 3), both extending along the entire perimeter of the body. main (1110), wherein the upper flat closure (1130) and the lower flat closure (1140) comprise, respectively, an upper flat plate (1135) and a lower flat plate (1145) that form a structure or component with a uniform and level surface, generally shaped to follow the outer contour of the main body (1110) of the plank (1000) and with reduced thickness in relation to its other dimensions. In the alternative embodiment described herein, the flat plates (1135, 1145) are made of PETG, laser-cut according to the outer contour of the plank (1000) and used to form the upper and lower faces of the plank, contributing to the structural rigidity and watertightness of the equipment.The upper flat plate (1135) comprises a thickness (1135-1) and is positioned on the upper face of the main body (1110), preferably, but without limiting the invention, on an upper peripheral recess (1110-2) of the main body (1110) that extends along the entire perimeter contour of the main body (1110), the upper flat plate (1135) being coupled to the main body (1110) by means of the application of resin combined with a hardening agent, thus forming a resistant and watertight surface lamination. It should be noted that here, as previously described regarding the alternatives for fitting and fixing the coupleable segments (1111), it is possible to couple the upper flat plate (1135) by means of other fastening elements.The lower flat plate (1145) comprises a thickness (1145-1) and is positioned on the upper face of the main body (1110), preferably, but without limiting the invention, on the lower peripheral recess (1110-3) of the main body (1110) that extends along the entire perimeter contour of the main body (1110), the lower flat plate (1145) being coupled to the main body (110) by means of the application of resin combined with a hardening agent, thus forming a resistant and watertight surface lamination. It should be noted that here, as well as... As previously described regarding the fitting and fixing options for the attachable segments (1111), it is possible to attach the lower flat plate (1145) using other fastening elements. Process of manufacturing a plank (100)

[0080] A process for manufacturing a plank (100) is a process for obtaining a plank (100) comprising a plurality of attachable segments, attachable to each other by means of fittings (120); at least one upper flat closure (130); at least one lower flat closure (140); at least one pressure relief valve (150); and at least one support means (160).

[0081] In a preferred embodiment of the invention, the manufacturing process of a board (100) of the invention initially comprises the digital modeling step of the board's shape (100). During this step, a three-dimensional internal mesh is defined, composed of interconnected hollow polygonal cells (112), wherein each polygonal cell (112) is provided with at least one communication hole (112-2) between adjacent walls (112-1).

[0082] Subsequently, a slicing file is generated that subdivides the internal mesh into multiple connectable segments (111). These connectable segments (111) are equipped with male-female type connectors (120).

[0083] Each attachable segment (111) of the inner mesh is then printed on a three-dimensional printer, using PETG filament. The printing is carried out layer by layer until the main body (110) of the board (100) is obtained.

[0084] The segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-9) are then coupled together by means of male-female type fittings (120).

[0085] Next, at least one upper flat closure (130) and at least one lower flat closure (140), in the form of fiberglass fabric or mat of thickness (130-1, 140-1), are cut to dimensions and shape suitable to the outer contour of the main body (110).

[0086] At least one pressure equalization valve (150) is inserted into at least one valve support (160-1) through a hole in the upper flat closure (130). It should be noted that the exposed part of the pressure equalization valve (150) must be protected before proceeding with lamination. It should also be noted that other support means (160) must be installed according to the project requirements and as already described.

[0087] A mixture of epoxy resin and hardening agent is prepared in a ratio of 0.1 to 50%, preferably 10 to 30% by weight of epoxy resin.

[0088] After that, the fabric(s) or fiber(s) of the flat closures (130, 140) are stretched over a smooth surface, such as a glass-topped table, and the epoxy resin is deposited, homogenized and scraped over the flat closures (130, 140).

[0089] After completing the previous step, ensuring a homogeneous distribution of resin and wetting the entire area of ​​fabric or fiber of the closures (130, 140), the resin gel point must be awaited, that is, the moment when, through polymerization reactions, the resin begins to increase in viscosity. The gelation time can vary from 20 minutes to 4 hours. During this step, the upper and lower parts of the outer edge (110-1) of the main body (110) are also wetted with resin, especially in the contact areas between the outer edge (110-1), the upper and lower ends of the polygonal cells (112) and the closures (130, 140).

[0090] Once the gel point is reached, apply the closures (130, 140) over the outer edge (110-1) and over the upper and lower ends of the polygonal cells (112), ensuring adhesion along the contact lines or Sequence of support points. The resin can take 1 to 12 hours to fully cure; it is necessary to wait for complete curing before proceeding to the next step.

[0091] After that, a final layer of resin finish (hot coat) is applied, which enhances the aesthetics, strength, and durability.

[0092] Finally, after curing, the surface finish of the board (100) is carried out, including polishing and, optionally, the application of varnish over the laminated surface.

[0093] Thus, in a preferred embodiment of the invention, the manufacturing process of a board (100) of the invention comprises: A. Digitally model the shape of the board (100), defining a three-dimensional internal mesh composed of polygonal cells (112) comprising a plurality of walls (112-1) and at least one communication hole (112-2) between adjacent walls (112-1); B. Generate a slicing file that subdivides the internal mesh into multiple connectable segments (111), wherein these connectable segments (111) are provided with male-female type connectors (120); C. Print, on a three-dimensional printer, each of the attachable segments (111) in the form of separate segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-n); D. Connect the segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-n) to each other using the fittings (120); E. Cut, in dimensions and shape suitable to the outer contour of the main body (110) of the board (100), at least one upper flat closure (130) and at least one closure lower plane (140), in the form of fabric or fiberglass mat of thickness (130-1, 140-1); F. Insert, in at least one valve holder (160-1) of the board (100), at least one pressure equalization valve (150); G. Prepare a mixture of epoxy resin and hardener in a ratio of 0.1 to 50%, preferably 10 to 30% by weight of epoxy resin; H. Stretch the fabric(s) or fiber(s) of the flat closures (130, 140) over a smooth surface and perform the deposition, homogenization and scraping of the epoxy resin over the flat closures (130, 140); I. Wait for the resin to gel; J. Apply the closures (130, 140) on the outer edge (110-1) and on the upper and lower ends of the polygonal cells (112); K. Apply a final layer of resin finish (hot coat),- and L. Perform surface finishing of the board (100), including polishing and, optionally, applying varnish over the laminated surface.

[0094] In an alternative embodiment of the present invention, the board (1000) comprises a main body (1110) comprising at least one upper peripheral recess (1110-2) and at least one lower peripheral recess (1110-3), both extending along the entire perimeter contour of the main body (110), wherein the upper flat closure (1130) and the lower flat closure (1140) comprise, respectively, an upper flat plate (1135) and a lower flat plate (1145) made of laser-cut PETG that form a structure or component with a uniform surface and leveled, generally shaped to follow the outer contour of the main body (1110) of the plank (1000) and with reduced thickness in relation to its other dimensions. In the alternative embodiment described here, the flat plates (1135, 1145) are made of PETG, laser cut according to the outer contour of the plank (1000) and used to form the upper and lower faces of the plank, contributing to the structural rigidity and watertightness of the equipment. The upper flat plate (1135) comprises a thickness (1135-1) and is positioned on the upper face of the main body (110), preferably, but without limiting the invention, on an upper peripheral recess (1110-2) of the main body (1110) that extends along the entire perimeter contour of the main body (1110), the upper flat plate (1135) being coupled to the main body (1110) by means of the application of resin combined with a hardening agent, thus forming a resistant and watertight surface lamination.It should be noted that here, as previously described regarding the fitting and fixing alternatives of the attachable segments (111), it is possible to attach the upper flat plate (1135) by means of other fastening elements. The lower flat plate (1145) comprises a thickness (1145-1) and is positioned on the upper face of the main body (1110), preferably, but without limiting the invention, on the lower peripheral recess (1110-3) of the main body (1110) that extends along the entire perimeter contour of the main body (1110), the lower flat plate (1145) being attached to the main body (1110) by means of the application of resin combined with a hardening agent, thus forming a resistant and watertight surface lamination. It should be noted that here, as previously described regarding the fitting and fixing alternatives of the attachable segments (111), it is possible to attach the lower flat plate (1145) by means of other fastening elements.

[0095] In this alternative embodiment of the present invention, the manufacturing process of a plank (1000) of the invention comprises: AA. Digitally model the shape of the board (1000), defining a three-dimensional internal mesh composed of polygonal cells (112) comprising a plurality of walls (112-1) and at least one communication hole (112-2) between adjacent walls (112-1); BB. Generate a slicing file that subdivides the internal mesh into multiple connectable segments (111), wherein these connectable segments (111) are provided with male-female type connectors (120); CC. Print, on a three-dimensional printer, each of the attachable segments (111) in the form of separate segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-9); DD. Connect the segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-9) to each other using the fittings (120); EE. Cut, in dimensions and shape suitable to the outer contour of the main body (110) of the board (100), at least one upper flat plate (1135) and at least one lower flat plate (1145); FF. Position the upper flat plate (1135) over the upper peripheral recess (1110-2) of the upper face of the main body (1110); GG. Insert, in at least one valve holder (160-1) of the board (1000), at least one equalization valve of pressure (150); HH. Position the lower flat plate (1145) over the lower peripheral recess (1110-3) of the lower face of the main body (1110); II. Prepare a mixture of epoxy resin and hardening agent in a ratio of 0.1 to 50%, preferably 10 to 30% by weight of epoxy resin; JJ. Perform the deposition, homogenization and scraping of the epoxy resin onto the flat plates (1110-2, 1110-3); KK. Wait for the resin to gel; LL. Apply a final layer of resin finish (hot coat) and MM. Perform surface finishing of the board (1000), including polishing and, optionally, applying varnish over the laminated surface. Final considerations

[0096] As can be inferred from the description above, the modular configuration of the main body (110) of the board (100), composed of a plurality of attachable segments (111), allows the manufacture of each segment individually by 3D printing. This approach significantly reduces material waste compared to conventional machining processes, where bulky blocks of material are discarded. Modularity also simplifies the transport and storage of the board (100), since the segments (111) can be disassembled and reassembled before lamination without requiring extra tools or fasteners.

[0097] The use of male-female type fittings (120) for connecting the coupling segments (111) ensures a robust and precise assembly. guaranteeing the structural integrity of the board (100) even under conditions of intense handling during the manufacture of the board (100). This solution makes it possible to dispense with the use of adhesives or mechanical fasteners, simplifying the assembly and maintenance process.

[0098] The inclusion of at least one upper flat closure (130) and at least one lower flat closure (140), coupled to the corresponding faces of the main body (110) of the board (100), contributes to the tightness and strength of the equipment. These closures, when combined with the honeycomb-type internal structure (112), provide a uniform distribution of stresses, increasing the durability of the equipment.

[0099] The pressure release valve (150) integrated into the main body (110) allows for the equalization of internal pressure, preventing structural damage caused by temperature and pressure variations. This functionality is particularly relevant in aquatic environments, where prolonged exposure to the sun or sudden temperature changes can generate internal pressures that compromise the integrity of the board (100).

[0100] The support medium (160), which may include elements such as valve support (160-1), leash attachment holes (160-2) and fin attachment base (160-3), offers versatility and adaptability for different water sports. This feature expands the functionality of the board (100), making it suitable for a variety of uses and user preferences.

[0101] The process also includes the use of top (130) and bottom (140) flat closures, which are cut to the precise dimensions of the main body (110) of the board (100) and impregnated with epoxy resin. This step contributes to the watertightness and strength of the board (100), in addition to to reduce the amount of resin needed compared to traditional processes.

[0102] The process described also facilitates the customization and modularity of the board (100), allowing the segments (111) to be manufactured on small or medium-sized 3D printers. This makes the process more accessible and viable for different production scales, as well as simplifying the transport and storage of the disassembled boards (100).

[0103] Therefore, it is concluded that the board (100), as well as the manufacturing process of a board (100), are new, inventive and capable of industrial application, contributing with a new and unexpected technical effect in boards (100) of the nature treated here. Conclusion

[0104] It will be readily understood by those skilled in the art that modifications can be made to the present invention without departing from the concepts set forth in the description above. These modifications should be considered as falling within the scope of the present invention. Consequently, the particular embodiments described in detail above are merely illustrative and exemplary and not limiting as to the scope of the present invention, to which the full extent of the appended claims and any equivalents thereof should be given.

Claims

CLAIMS 1. Board for water sports or leisure, characterized by comprising: - a main body (110) comprising a plurality of attachable segments (111), attachable to each other by means of fittings (120); - at least one upper flat closure (130) coupled to an upper face of the main body (110); - at least one lower flat closure (140) coupled to a lower face of the main body (110); - at least one pressure relief valve (150); and - at least one means of support (160); wherein the coupleable segments (111) comprise at least one first segment (111-1), at least one nth or last segment (111-n) and a plurality of intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) disposed between the first segment (111-1) and the last segment (111-n).

2. A board, according to claim 1, characterized in that each attachable segment (111) defines a portion of an internal structure of the board (100) of the honeycomb type, comprising a multiplicity of polygonal cells (112) comprising a plurality of walls (112-1) and at least one communication hole (112-2) between adjacent walls (112-1) of adjacent polygonal cells (112).

3. Plank, according to claim 1, characterized in that the first segment (111-1) comprises at least a first part of the outer edge (110-111-1), a plurality of polygonal cells (112) and, optionally and / or optionally, at least one front polygonal cell. (112-3).

4. Plank, according to claim 3, characterized in that the first part of the outer edge (110-111-1) corresponds to the section of the outer edge (110-1) of the main body (110) that partially encloses the first segment (111-1), wherein the polygonal cells (112, 112-3) comprise a hexagonal shape, wherein the polygonal cells (112, 112-3), in the vicinity of the first part of the outer edge (110-111-1), may have at least one of their sides or walls (112-1) formed by the first part of the outer edge (110-111-1).

5. Plank, according to claim 1, characterized in that the nth or last segment (111-n) comprises at least one nth or last part of the outer edge (110-111-n) and a plurality of polygonal cells (112).

6. Plank, according to claim 6, characterized in that the nth or last part of the outer edge (110-111-n) corresponds to the section of the outer edge (110-1) of the main body (110) that partially encloses the nth or last segment (111-n), wherein the polygonal cells (112) comprise a hexagonal shape, wherein the polygonal cells (112), in the vicinity of the nth part of the outer edge (110-111-n), may have at least one of their sides or walls (112-1) formed by the nth or last part of the outer edge (110-111-n).

7. Plank according to claim 1, characterized in that the intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) each comprise at least a second, a third, a fourth, a fifth, a sixth, a seventh, an eighth and a ninth part of the outer edge (110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9) and a plurality of cells polygons (112).

8. Plank according to claim 9, characterized in that the outer edge portions (110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9) correspond to the outer edge portions (110-1) of the main body (110) in the vicinity of the intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9), wherein the intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) comprise a hexagonal shape, wherein the polygonal cells (112), in the vicinity of the outer edge parts (110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9), may have at least one of their sides or walls (112-1) formed, respectively, by at least one of the outer edge parts (110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110- 111-9).

9. Board, according to claim 1, characterized in that the attachable segments (111) are dimensioned in such a way as to allow its manufacture by means of additive manufacturing or 3D printing on small or medium-sized 3D printers.

10. Plank, according to claim 1, characterized in that the fittings (120) comprise a male portion (121) and a female portion (122), wherein the male portion (121) comprises a male rod (121-1), extending from the lower part of one of the ends of at least one of the outer edges (110-111-1, 110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9, 110-111-n), and comprising at least two protrusions (121-2), wherein the female portion (122) comprises a female rod (122-1), extending from the upper part from one end of at least one of the outer edges (110-111-1, 110-111-2, 110-111-3, 110-111-4, 110-111-5, 110-111-6, 110-111-7, 110-111-8, 110-111-9, 110-111-n).

11. Plank, according to claim 13, characterized in that the fittings (120) can also be arranged in one or more of the walls (112-1) of polygonal cells (112) of adjacent coupleable segments (111).

12. Plank, according to any of the preceding claims, characterized in that the adjacent segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-n) are coupled together by means of the fittings (120).

13. Plank, according to claim 1, characterized in that the upper flat closure (130) and the lower flat closure (140) comprise fiberglass fabric or mat impregnated with epoxy resin applied over the structural body (110), wherein the upper flat closure (130) is disposed over and coupled to the upper part of the main body (110-1) and wherein the lower flat closure (140) is disposed over and coupled to the lower part of the main body (110-1).

14. Plank, according to claim 1, characterized in that the pressure release valve (150) is a one-way check valve, configured to allow the exhaust of gases or water vapor from the interior of the main body (110), without allowing water to enter the main body (110).

15. Board, according to claim 1, characterized in that the support means (160) comprises a valve support (160-1) for the installation of the pressure release valve (150) and / or a hole for attaching the leash (160-2) and / or a base (160-3) for attaching fins.

16. Manufacturing process of a board for water sports or leisure, to obtain a board (100) defined in any of the Claims 1 to 15, characterized by comprising: A. Digitally model the shape of the board (100), defining a three-dimensional internal mesh composed of polygonal cells (112) comprising a plurality of walls (112-1) and at least one communication hole (112-2) between adjacent walls (112-1); B. Generate a slicing file that subdivides the internal mesh into multiple connectable segments (111), wherein these connectable segments (111) are provided with male-female type connectors (120); C. Print, on a three-dimensional printer, each of the attachable segments (111) in the form of separate segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-n); D. Connect the segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-n) to each other using the fittings (120); E. Cut, in dimensions and shape suitable to the outer contour of the main body (110) of the board (100), at least one upper flat closure (130) and at least one lower flat closure (140), in the form of fabric or fiberglass mat of thickness (130-1, 140-1); F. Insert, in at least one valve holder (160-1) of the board (100), at least one pressure equalization valve (150); G. Prepare a mixture of epoxy resin and hardener in a ratio of 0.1 to 50%, preferably 10 to 30% in weight of the epoxy resin; H. Stretch the fabric(s) or fiber(s) of the flat closures (130, 140) over a smooth surface and perform the deposition, homogenization and scraping of the epoxy resin over the flat closures (130, 140); I. Wait for the resin to gel; J. Apply the closures (130, 140) on the outer edge (110- 1) and on the upper and lower ends of the polygonal cells (112); K. Apply a final layer of resin finish (hot coat),- and L. Perform surface finishing of the board (100), including polishing and, optionally, applying varnish over the laminated surface.

17. Board for water sports or leisure, wherein the board (1000) is characterized by comprising: - a main body (110) comprising a plurality of attachable segments (111), attachable to each other by means of fittings (120); - at least one top flat closure (1130) coupled to an upper face of the main body (110); - at least one lower flat closure (1140) coupled to a lower face of the main body (110); - at least one pressure relief valve (150); and - at least one means of support (160); wherein the coupleable segments (111) comprise at least one first segment (111-1), at least one nth or last segment (111-n) and a plurality of intermediate segments (111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9) arranged between the first segment (111-1) and the last segment (111-n).

18. Plank, according to claim 17, characterized in that the main body (110) comprises at least one upper peripheral recess (1110-2) and at least one lower peripheral recess (1110-3), both extending along the entire perimeter contour of the main body (110), wherein the upper flat closure (1130) and the lower flat closure (1140) comprise, respectively, an upper flat plate (1135) and a lower flat plate (1145), made of laser-cut PETG.

19. Plank, according to claim 18, characterized in that the upper flat plate (1135) comprises a thickness (1135-1) and is positioned over the upper peripheral recess (1110-2), wherein the upper flat plate (1135) is coupled to the main body (110) by means of the application of resin combined with a hardening agent.

20. Plank, according to claim 18, characterized in that the lower flat plate (1145) comprises a thickness (1145-1) and is positioned over the lower peripheral recess (1110-3), wherein the lower flat plate (1145) is coupled to the main body (110) by means of the application of resin combined with a hardening agent.

21. Manufacturing process for a board for water sports or leisure, for obtaining a board (100) defined in any of claims 1 to 15, characterized by comprising: AA. Digitally model the shape of the board (100), defining a three-dimensional internal mesh composed of polygonal cells (112) comprising a plurality of walls (112-1) and at least one communication hole (112-2) between adjacent walls (112-1); BB. Generate a slicing file that subdivides the internal mesh into multiple connectable segments (111), wherein these connectable segments (111) are provided with male-female type connectors (120); CC. Print, on a three-dimensional printer, each of the attachable segments (111) in the form of separate segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-9); DD. Connect the segments (111-1, 111-2, 111-3, 111-4, 111-5, 111-6, 111-7, 111-8, 111-9, 111-9) to each other using the fittings (120); EE. Cut, in dimensions and shape suitable to the outer contour of the main body (110) of the board (100), at least one upper flat plate (1135) and at least one lower flat plate (1145); FF. Position the upper flat plate (1135) over the upper peripheral recess (1110-2) of the upper face of the main body (110); GG. Insert, in at least one valve holder (160-1) of the board (100), at least one pressure equalization valve (150); HH. Position the lower flat plate (1145) over the lower peripheral recess (1110-3) of the lower face of the main body (110); II. Prepare a mixture of epoxy resin and hardening agent in a ratio of 0.1 to 50%, preferably 10 to 30% by weight of epoxy resin; JJ. Perform the deposition, homogenization and scraping of the epoxy resin onto the flat plates (1110-2, 1110-3); KK. Wait for the resin to gel; LL. Apply a final layer of resin finish (hot coat),- and MM. Perform surface finishing of the board (1000), including polishing and, optionally, applying varnish over the laminated surface.

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