Hydrofoil, hydrofoil forming mold, hydrofoil manufacturing method and water vehicle

Abstract

The invention belongs to the technical field of composite material manufacturing, and discloses a hydrofoil, a hydrofoil forming mold, a hydrofoil manufacturing method and an overwater carrier. The hydrofoil comprises a surface layer, an anti-bending sandwich layer and a core material layer which are sequentially arranged from outside to inside, the hydrofoil further comprises an anti-impact layer, and the anti-impact layer is clamped between the surface layer and the anti-bending sandwich layer. According to the hydrofoil, the impact resistance can be improved, and then the service life of the hydrofoil is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material manufacturing, and in particular to a hydrofoil, a hydrofoil forming die, a hydrofoil manufacturing method and a water vehicle. Background Art

[0002] Hydrofoils are core components of water vehicles such as hydrofoil ships and hydrofoil water sports equipment. During the operation of the above-mentioned water vehicles, the hydrofoils can provide upward lift for the vehicles through the different speeds of water flowing through their upper and lower surfaces underwater, which can not only reduce the resistance and wave-making resistance of the hull, but also reduce the turbulence of the hull, and have a wide range of applications.

[0003] When the hydrofoil moves in the water, the density of water is about 800 times that of air. Therefore, the lift of a hydrofoil with the same shape and motion state is about 800 times greater than that of an aircraft wing. To support the same weight, the area required for a hydrofoil is much smaller than that of an aircraft wing. At the same time, the frictional resistance and induced resistance of the hydrofoil also increase accordingly. Therefore, during the service life of the hydrofoil, it needs to withstand high-frequency bending fatigue loads and face the risk of damage from foreign object impact.

[0004] Composite materials have excellent properties of light weight, high stiffness and high strength, as well as good vibration isolation and noise reduction, fatigue resistance and corrosion resistance, so composite materials are widely used in the manufacture of hydrofoils. However, existing composite hydrofoils have problems such as insufficient impact resistance and inability to maintain buoyancy in extreme damage situations, and are not safe to use.

[0005] Therefore, there is an urgent need for a hydrofoil, a hydrofoil forming mold, a hydrofoil manufacturing method and a water vehicle to solve the above problems. Summary of the invention

[0006] According to one aspect of the present invention, an object is to provide a hydrofoil, which can improve impact resistance and thus increase the service life of the hydrofoil.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Hydrofoils, including:

[0009] The surface layer, the bending-resistant sandwich layer and the core material layer are arranged in sequence from the outside to the inside;

[0010] The hydrofoil further comprises an impact-resistant layer, and the impact-resistant layer is sandwiched between the surface layer and the anti-bending sandwich layer.

[0011] As a preferred solution of the hydrofoil provided by the present invention, the bending-resistant sandwich layer includes a first flexible layer and a second flexible layer which are stacked.

[0012] As a preferred embodiment of the hydrofoil provided by the present invention, the core material layer is a foam core material.

[0013] According to another aspect of the present invention, an object is to provide a hydrofoil forming mold, which can be used for forming the hydrofoil as described in any one of the above schemes, and the hydrofoil forming mold comprises:

[0014] The mold base and the mold cover are detachably connected, the mold base is provided with a first molding groove, the mold cover is provided with a second molding groove, the first molding groove and the second molding groove are connected and connected to form a perfusion molding space, and the hydrofoil can be perfusion molded in the perfusion molding space.

[0015] As a preferred solution of the hydrofoil forming mold provided by the present invention, the mold base is provided with an annular guide groove around the first forming groove, the groove bottom height of the annular guide groove is higher than the groove bottom height of the first forming groove, and the annular guide groove is configured to allow the pouring material to flow;

[0016] The mold upper cover is provided with an introduction channel, which is connected to the annular guide groove and is configured to introduce the pouring material into the annular guide groove.

[0017] As a preferred solution of the hydrofoil forming mold provided by the present invention, a first sealing ring groove and a second sealing ring groove are arranged around the outer circumference of the first forming groove on the side of the mold base facing the mold upper cover, and a first sealing ring and a second sealing ring are respectively arranged in the first sealing ring groove and the second sealing ring, and the first sealing ring and the second sealing ring are both clamped between the mold base and the mold upper cover.

[0018] As a preferred solution of the hydrofoil forming mold provided by the present invention, the mold upper cover is provided with a sealed exhaust port, and the sealed exhaust port is located between the first sealing ring groove and the second sealing ring groove, and is configured to evacuate the space between the first sealing ring and the second sealing ring into a vacuum state.

[0019] As a preferred solution of the hydrofoil forming mold provided by the present invention, a vacuum exhaust channel is provided on the mold upper cover, and the vacuum exhaust channel is connected to the second forming groove and is configured to evacuate the injection molding space into a vacuum state.

[0020] According to another aspect of the present invention, an object is to provide a hydrofoil manufacturing method, wherein the hydrofoil as described in any of the above schemes can be manufactured using the hydrofoil manufacturing method, and the hydrofoil manufacturing method comprises:

[0021] S1, laying a first face cloth, an impact-resistant cloth and a first bending-resistant sandwich cloth in a mold in sequence to form an upper wing surface, and laying a core material on the upper wing surface;

[0022] S2, laying the second bending-resistant sandwich cloth on the core material in sequence, and overlapping and wrapping the first bending-resistant sandwich cloth with the second bending-resistant sandwich cloth, then folding the impact-resistant cloth and laying it on the second bending-resistant sandwich cloth, and then laying the second surface cloth, and overlapping and wrapping the first surface cloth with the second surface cloth to form a lower wing surface; the first surface cloth and the second surface cloth form the surface layer, the first bending-resistant sandwich cloth and the second bending-resistant sandwich cloth form the bending-resistant sandwich layer, the impact-resistant cloth forms the impact-resistant layer, and the core material forms the core material layer;

[0023] S3, performing vacuum infusion process;

[0024] S4, performing a curing and molding process, and then obtaining a finished hydrofoil.

[0025] According to another aspect of the present invention, an object is to provide a water vehicle, which includes a vehicle body, a hydrofoil connector and a hydrofoil as described in any of the above schemes, wherein the hydrofoil is connected to the vehicle body through the hydrofoil connector, and the hydrofoil can extend below the water surface.

[0026] Beneficial effects of the present invention:

[0027] The hydrofoil provided by the present invention comprises a surface layer, a bending-resistant sandwich layer and a core material layer arranged in sequence from the outside to the inside, and the hydrofoil further comprises an impact-resistant layer, which is sandwiched between the surface layer and the bending-resistant sandwich layer. By providing the impact-resistant layer, the impact resistance can be improved, the use safety can be improved, and the service life of the hydrofoil can be increased.

[0028] The hydrofoil forming mold provided by the present invention can be used for forming and manufacturing the above-mentioned hydrofoil, thereby improving the hydrofoil forming efficiency and the quality of the finished product.

[0029] The hydrofoil manufacturing method provided by the present invention can be used to manufacture the above-mentioned hydrofoil, thereby ensuring the finished product quality of the hydrofoil.

[0030] The water vehicle provided by the present invention is equipped with the hydrofoil, thereby improving safety and buoyancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0032] Figure 1 is a cross-sectional schematic diagram of a hydrofoil provided by an embodiment of the present invention;

[0033] Figure 2 is an exploded schematic diagram of a hydrofoil forming mold provided by an embodiment of the present invention;

[0034] Figure 3 is a schematic structural diagram of a hydrofoil forming mold provided by an embodiment of the present invention;

[0035] Figure 4 yes Figure 3 A magnified view of the structure marked as A.

[0036] In the figure:

[0037] 10. Surface layer; 20. Anti-bending sandwich layer; 21. First flexible layer; 22. Second flexible layer; 30. Core material layer; 40. Impact-resistant layer;

[0038] 100, mold base; 110, first molding groove; 120, annular guide groove; 130, first sealing ring groove; 140, second sealing ring groove;

[0039] 200, mold cover; 210, second molding groove; 220, introduction channel; 230, sealed exhaust port; 240, vacuum exhaust channel;

[0040] 300, injection molding space;

[0041] 410, first sealing ring; 420, second sealing ring. DETAILED DESCRIPTION

[0042] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] In this embodiment, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0051] Figure 1 FIG. 2 is a cross-sectional schematic diagram of a hydrofoil provided by an embodiment of the present invention. Figure 1The present embodiment provides a hydrofoil and a water vehicle. The water vehicle comprises a vehicle body, a hydrofoil connector and the hydrofoil provided in the present embodiment. The hydrofoil is connected to the vehicle body through the hydrofoil connector, and the hydrofoil can extend below the water surface.

[0052] The hydrofoil is subjected to the downward weight load of the vehicle body and the flow of water. According to Bernoulli's principle, the water flow will generate an upward thrust on the bottom surface of the hydrofoil. The downward gravity and upward thrust of the hydrofoil are balanced, so that the hydrofoil reaches a balanced working state. It can be seen that the main force of the hydrofoil is the upward bending moment of the two wings of the hydrofoil centered on the central axis, or the force on the two wings of the hydrofoil is applied, and the central axis position is subjected to an upward bending moment. Under the above force state, the multi-layer sandwich structure has excellent structural efficiency.

[0053] The hydrofoil provided in this embodiment includes a surface layer 10, a bending-resistant sandwich layer 20 and a core material layer 30 arranged in sequence from the outside to the inside. The hydrofoil also includes an impact-resistant layer 40, which is sandwiched between the surface layer 10 and the bending-resistant sandwich layer 20. The impact-resistant layer 40 can improve the impact resistance and thus increase the service life of the hydrofoil.

[0054] Specifically, in this embodiment, the core material layer 30 can be selected from foam core material, thereby increasing the moment of inertia of the hydrofoil section and reducing the overall weight of the hydrofoil. The foam core material can specifically be a closed-cell foam, which has an independent closed-cell bubble structure, a honeycomb appearance, and uniformly distributed holes. The closed-cell foam can be firmly and tightly integrated with the injection material, etc., and has high reliability and strong waterproofness. Through the above arrangement, the hydrofoil can still maintain a certain buoyancy in the extreme case where the surface layer 10, the anti-bending sandwich layer 20, and the anti-impact layer 40 are all damaged, thereby ensuring navigation safety.

[0055] It should be noted that the connection area between the hydrofoil and the hydrofoil connector is generally fastened by bolts. Compared with the bending resistance, the compressive resistance of the sandwich structure on the normal surface is weaker. Therefore, the connection area between the hydrofoil and the hydrofoil connector should avoid the foam sandwich and be connected using the pre-embedded process or the local reinforcement process.

[0056] Specifically, the bending-resistant sandwich layer 20 includes a first flexible layer 21 and a second flexible layer 22 stacked. The second flexible layer 22 is attached to the impact-resistant layer 40, and the first flexible layer 21 is attached to the core material layer 30. Preferably, in this embodiment, the second flexible layer 22 is formed by laying multiple layers of carbon fiber unidirectional fabrics, and the carbon fiber unidirectional fabric is specifically two layers, and the first flexible layer 21 is specifically formed by laying a single layer of carbon fiber multiaxial fabric. It should be noted that the materials and the number of layers of the first flexible layer 21 and the second flexible layer 22 can be selected according to the actual bending and torsion requirements of the hydrofoil, and this embodiment does not limit this.

[0057] More specifically, the impact-resistant layer 40 can be formed by laying polyester fabric. The surface layer 10 can be formed by laying carbon fiber twill fabric, which can balance the overall strength of the hydrofoil and ensure the neat and beautiful appearance of the hydrofoil.

[0058] Figure 2 FIG. 1 is an exploded schematic diagram of a hydrofoil forming mold provided by an embodiment of the present invention, Figure 3 FIG. 2 is a schematic diagram showing the structure of a hydrofoil forming mold provided by an embodiment of the present invention. Figure 2 and Figure 3 The present embodiment also provides a hydrofoil forming mold. The hydrofoil forming mold can be used for forming the hydrofoil provided in the present embodiment, and the hydrofoil forming mold comprises a mold base 100 and a mold upper cover 200 that are detachably connected. The mold base 100 is provided with a first forming groove 110, and the mold upper cover 200 is provided with a second forming groove 210. The first forming groove 110 and the second forming groove 210 are connected and connected to form a perfusion forming space 300, and the hydrofoil can be perfused and formed in the perfusion forming space 300.

[0059] Specifically, Figure 4 Show Figure 3 A partial enlarged view of the structure marked as A. Figure 2-Figure 4 The mold base 100 is provided with an annular guide groove 120 around the first molding groove 110, the bottom height of the annular guide groove 120 is higher than the bottom height of the first molding groove 110, and the annular guide groove 120 is configured to allow the pouring material to flow evenly into the first molding groove 110. The mold upper cover 200 is provided with an introduction channel 220, which is connected to the annular guide groove 120 and is configured to introduce the pouring material into the annular guide groove 120. In this embodiment, the pouring material can be specifically epoxy resin.

[0060] More specifically, the mold upper cover 200 is provided with a vacuum exhaust channel 240 , which is connected to the second molding groove 210 and is configured to exhaust the infusion molding space 300 into a vacuum state during the vacuum infusion process.

[0061] More specifically, the mold base 100 is provided with an annular first sealing ring groove 130 and an annular second sealing ring groove 140 around the outer circumference of the first molding groove 110 on one side facing the mold upper cover 200, and the first sealing ring groove 130 and the second sealing ring groove 140 are arranged at intervals. The first sealing ring groove 130 and the second sealing ring groove 140 are respectively provided with a first sealing ring 410 and a second sealing ring 420, and the first sealing ring 410 and the second sealing ring 420 are both sandwiched between the mold base 100 and the mold upper cover 200. Through the above arrangement, the reliability of the sealing of the injection molding space 300 can be guaranteed.

[0062] Preferably, the mold upper cover 200 is provided with a sealed air extraction port 230, which is located between the first sealing ring groove 130 and the second sealing ring groove 140 and is configured to evacuate the space between the first sealing ring 410 and the second sealing ring 420 into a vacuum state. By forming a vacuum in the space between the first sealing ring 410 and the second sealing ring 420, the sealing performance can be further improved.

[0063] This embodiment also provides a method for manufacturing a hydrofoil. The hydrofoil provided in this embodiment can be manufactured using the hydrofoil manufacturing method, which is also performed using the hydrofoil forming mold provided in this embodiment, and specifically includes the following steps:

[0064] First, clean the first molding groove 110 of the mold base 100 and apply a release agent, and then perform the following steps:

[0065] Step S1, lay a layer of carbon fiber twill fabric in the first molding groove 110 of the mold base 100 to form a first face cloth, which can be used as the upper wing surface layer of the hydrofoil. The size of the first face cloth is 20 to 25 mm beyond the product boundary; then lay polyester fabric as an impact-resistant cloth. The size of the impact-resistant cloth is based on the ability to wrap the upper wing surface of the hydrofoil and the lower wing surface of the hydrofoil, and extend through the leading edge of the hydrofoil and cover the lower wing surface. Then lay two layers of carbon fiber unidirectional fabric and a layer of carbon fiber multiaxial fabric in sequence to form a first bending-resistant sandwich fabric. The size of the carbon fiber unidirectional fabric here is consistent with the size of the upper wing surface, and the size of the carbon fiber multiaxial fabric here needs to exceed the product boundary by 10 to 20 mm. Then place the closed-cell foam core material.

[0066] Step S2, the carbon fiber multiaxial fabric of the first bending-resistant sandwich cloth is reversed in place on the side of the closed-cell foam core material away from the mold base 100, and then another layer of carbon fiber multiaxial fabric is laid. The size of the carbon fiber multiaxial fabric laid on the side of the closed-cell foam core material away from the mold base 100 is consistent with the size of the lower wing surface, so that the closed-cell foam core material is completely wrapped by the carbon fiber multiaxial fabric. Then, two layers of carbon fiber unidirectional fabrics with the same size as the lower wing surface are laid, and the carbon fiber multiaxial fabric laid on the side of the closed-cell foam core material away from the mold base 100 forms a second bending-resistant sandwich cloth. The above steps realize the overlap and wrapping of the first bending-resistant sandwich cloth and the second bending-resistant sandwich cloth. Then, the polyester fabric is folded and covered on the second bending-resistant sandwich cloth through the leading edge position of the hydrofoil, and the polyester fabric is trimmed so that the polyester fabric is flush with the trailing edge of the hydrofoil. Finally, the carbon fiber twill fabric is laid to form the lower wing surface ply of the hydrofoil, and overlapped and wrapped with the upper wing surface ply.

[0067] Then, the mold upper cover 200 is buckled onto the mold base 100 and fastened with bolts, and then step S3 is performed to perform a vacuum infusion process.

[0068] Step S3 specifically includes: first, evacuate through the sealed exhaust port 230 to form a vacuum sealing area between the first sealing ring groove 130 and the second sealing ring groove 140, and the vacuum degree is maintained at -99KPa. Then, the injection molding space 300 is evacuated into a vacuum state through the vacuum exhaust channel 240 and maintained at -99KPa. The vacuum degree is required to be less than or equal to 1KPa in 15 minutes. After the vacuum leak test is qualified, epoxy resin is poured into the inlet channel 220, and the epoxy resin is poured into the injection molding space 300 through the annular guide groove 120. When the epoxy resin flows out of the vacuum exhaust channel 240, the injection of epoxy resin is stopped.

[0069] Then, step S4 is performed to perform a curing molding process. In step S4, the hydrofoil molding mold is heated to 80°C by a mold temperature controller, and the curing time is maintained for 8 hours. After the hydrofoil molding mold is cooled to room temperature, the product is demoulded and the edge is polished, and then the hydrofoil finished product is obtained.

[0070] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A hydrofoil, characterized in that: include: A surface layer (10), a bending-resistant sandwich layer (20) and a core material layer (30) are arranged in sequence from the outside to the inside; The hydrofoil further comprises an impact-resistant layer (40), wherein the impact-resistant layer (40) is sandwiched between the surface layer (10) and the anti-bending core layer (20).

2. The hydrofoil according to claim 1, characterized in that: The bending-resistant sandwich layer (20) comprises a first flexible layer (21) and a second flexible layer (22) which are stacked.

3. The hydrofoil according to claim 1 or 2, characterized in that: The core material layer (30) is a foam core material.

4. Hydrofoil forming die, characterized in that: The hydrofoil forming mold can be used for forming the hydrofoil according to any one of claims 1 to 3, and the hydrofoil forming mold comprises: A mold base (100) and a mold cover (200) are detachably connected and arranged, wherein the mold base (100) is provided with a first molding groove (110), and the mold cover (200) is provided with a second molding groove (210), and the first molding groove (110) and the second molding groove (210) are connected and connected to form a perfusion molding space (300), and the hydrofoil can be perfusion molded in the perfusion molding space (300).

5. The hydrofoil forming die according to claim 4, characterized in that: The mold base (100) is provided with an annular guide groove (120) around the first molding groove (110), the groove bottom height of the annular guide groove (120) is higher than the groove bottom height of the first molding groove (110), and the annular guide groove (120) is configured to allow the pouring material to flow; The mold upper cover (200) is provided with an introduction channel (220), and the introduction channel (220) is connected to the annular guide groove (120) and is configured to introduce the injection material into the annular guide groove (120).

6. The hydrofoil forming die according to claim 4, characterized in that: A first sealing ring groove (130) and a second sealing ring groove (140) are arranged around the outer periphery of the first molding groove (110) on one side of the mold base (100) facing the mold upper cover (200); a first sealing ring (410) and a second sealing ring (420) are arranged in the first sealing ring groove (130) and the second sealing ring (140), respectively; the first sealing ring (410) and the second sealing ring (420) are both sandwiched between the mold base (100) and the mold upper cover (200).

7. The hydrofoil forming mold according to claim 6, characterized in that: The mold upper cover (200) is provided with a sealed air evacuation port (230), and the sealed air evacuation port (230) is located between the first sealing ring groove (130) and the second sealing ring groove (140), and is configured to evacuate the space between the first sealing ring (410) and the second sealing ring (420) into a vacuum state.

8. The hydrofoil forming die according to any one of claims 4 to 7, characterized in that: The mold upper cover (200) is provided with a vacuum exhaust channel (240), and the vacuum exhaust channel (240) is connected to the second molding groove (210) and is configured to exhaust the injection molding space (300) into a vacuum state.

9. A method for manufacturing a hydrofoil, characterized in that: The hydrofoil according to any one of claims 1 to 3 can be manufactured by the hydrofoil manufacturing method, which comprises: S1, laying a first face cloth, an impact-resistant cloth and a first bending-resistant sandwich cloth in a mold in sequence to form an upper wing surface, and laying a core material on the upper wing surface; S2, laying a second bending-resistant sandwich cloth on the core material in sequence, and overlapping and wrapping the first bending-resistant sandwich cloth with the second bending-resistant sandwich cloth, then folding the impact-resistant cloth and laying it on the second bending-resistant sandwich cloth, and then laying a second face cloth, and overlapping and wrapping the first face cloth with the second face cloth to form a lower wing surface; the first face cloth and the second face cloth form the face layer (10), the first bending-resistant sandwich cloth and the second bending-resistant sandwich cloth form the bending-resistant sandwich layer (20), the impact-resistant cloth forms the impact-resistant layer (40), and the core material forms the core material layer (30); S3, perform vacuum infusion process; S4, performing a curing and molding process, and then obtaining a finished hydrofoil.

10. A water vehicle, characterized in that: It comprises a vehicle body, a hydrofoil connector and the hydrofoil as described in any one of claims 1 to 3, wherein the hydrofoil is connected to the vehicle body via the hydrofoil connector, and the hydrofoil can extend below the water surface.

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