Composite material cantilever crane forming die and forming method

Abstract

The invention discloses a composite material cantilever crane forming die and a forming method. The composite material cantilever crane forming mold comprises a core mold, a combined outer mold and a vacuum bag comprising a first vacuum film and a second vacuum film, the core mold is arranged in the combined outer mold, and the vacuum bag is located between the core mold and the combined outer mold; corresponding flow guide holes are formed in the core mold and the vacuum bag respectively and used for allowing flow guide pipes to penetrate through. The forming method of the composite material arm support comprises the steps that the outer surface of a core mold is coated with a first vacuum film, the outer surface of the core mold is coated with a second vacuum film after an arm support material is laid, the two vacuum films are connected in a sealed mode to form a vacuum bag, a flow guide pipe extends into the vacuum bag, and the flow guide pipe is connected with a vacuum pump to vacuumize the vacuum bag; mounting a combined outer die, connecting a heating device, improving the vacuum degree of a vacuum pump, alternately extruding the combined outer die, vacuumizing until die assembly is completed, removing the heating device, curing and forming the cantilever crane, and carrying out surface treatment. The resin content and porosity of the composite material arm support are low, and the production efficiency of the forming method is high.

Description

Technical Field

[0001] The present application belongs to the technical field of composite materials, and specifically relates to a composite arm forming mold and a forming method. Background Art

[0002] Booms are a key lifting component in engineering vehicles, such as aerial work platforms, cranes, and fire rescue vehicles. Lightweighting of booms is an effective way to increase boom reach and lifting torque. Replacing traditional high-strength steel booms with composite booms, which offer high specific strength, high specific modulus, ease of forming, and excellent fatigue resistance, is a future trend in lightweight engineering machinery.

[0003] At present, there are two main ways to form composite booms: prepreg / hand lay-up molding and winding molding. In the existing technology, composite booms formed by prepreg / hand lay-up are formed by fiber / prepreg laying, and after laying, they are compressed through vacuum bags or external molds to make the shape and structure regular, and then heated and cured. The material and labor costs are high, the degree of automation is low, and the operating skills of personnel are high. It is not suitable for mass industrial production; the composite booms formed by winding molding have a high resin content, and the overall strength and stiffness of the booms are low. In addition, the booms manufactured by the existing winding molding technology have a high porosity content, and the resin properties are highly sensitive to pore defects, which leads to a significant reduction in the compression, interlaminar shear performance and impact resistance of the composite booms. Summary of the Invention

[0004] Purpose: In view of at least one of the above technical problems, the present application provides a composite arm forming mold and forming method to reduce the resin content and porosity of the composite arm and improve the mechanical strength of the arm.

[0005] Technical solution: To solve the above technical problems, the technical solution adopted in this application is: According to a first aspect of the present application, there is provided a composite boom forming die, comprising a core die, a combined outer die, and a vacuum bag comprising a first vacuum film and a second vacuum film; The core mold is a hollow structure, with a hollow channel extending through the center along the length direction; a first guide hole is provided on the core mold, passing through the inner and outer surfaces of the core mold and communicating with the hollow channel; The core mold is placed inside the combined outer mold, and the vacuum bag is located between the core mold and the combined outer mold; The first vacuum film is covered on the outer surface of the core mold, and the second vacuum film is covered on the inner surface of the combined outer mold. The first vacuum film and the second vacuum film are sealed and connected at both ends by a sealing member to form a vacuum bag; A second guide hole corresponding to the position of the first guide hole is opened on the first vacuum film; the second guide hole is used to seal and connect one end of the guide tube, and the other end of the guide tube can pass through the corresponding first guide hole and extend from the hollow channel of the core mold to the outside of the core mold.

[0006] In some embodiments, the combined outer mold is formed by splicing two or more half molds; a connecting hole is opened on each half mold, and the half molds are fastened and spliced ​​through the connecting holes with connecting parts to form the combined outer mold.

[0007] In some embodiments, there are multiple first guide holes, which are arranged at intervals; the distance between adjacent first guide holes is no more than 0.3 to 1 m, and the diameter of the first guide holes is 5 to 30 mm.

[0008] In some embodiments, the core mold and the combined outer mold are made of high-strength steel Q345.

[0009] In some embodiments, the vacuum bag is made of at least one of polyamide, polyester, and polyolefin.

[0010] In some embodiments, the guide tube is made of at least one of PE and silicone rubber.

[0011] According to a second aspect of the present application, a method for forming a composite boom is provided. Based on a composite boom forming mold, the method comprises: S1, covering the outer surface of the core mold with a first vacuum film so that the first guide hole on the core mold corresponds to the second guide hole on the first vacuum film; S2. Sealing one end of the guide tube to the second guide hole and aligning it flush with the outer surface of the core mold, and passing the other end of the guide tube through the corresponding first guide hole and extending it out of the hollow channel of the core mold; S3, after laying the breathable felt and release cloth on the first vacuum film, wrapping the fiber impregnated with resin, and vibrating the core mold to remove bubbles; S4, laying a second vacuum film on the resin-impregnated fiber, and sealingly connecting the first vacuum film and the second vacuum film at corresponding ends with sealing members to form a vacuum bag; S5. Connect the other end of the guide tube to a vacuum pump with a resin collector, and use the vacuum pump to evacuate the vacuum bag to preliminarily shape the boom. The vacuum degree is set to -0.05 to -0.08 MPa. S6. Install the combined outer mold and connect the core mold and the combined outer mold to the heating device respectively; S7. Increase the vacuum degree of the vacuum pump to -0.08~-0.1MPa, alternately squeeze the combined outer mold, and evacuate until the mold is closed. Continue to evacuate after the mold is closed; S8, remove the heating device, and place the entire mold into a curing furnace to solidify the arm frame; S9. Remove the combined outer mold, vacuum bag, breathable felt and release cloth and perform surface treatment.

[0012] In some embodiments, the vibration frequency of the vibrating core mold to expel internal bubbles is 50-100 Hz, and the vibration duration is 5-10 minutes.

[0013] In some embodiments, the heating method for the core mold is selected from one of electric heating wire heating, electric heating tube heating, and hot air heating; the heating method for the combined outer mold is selected from one of electric heating wire heating, electric heating tube heating, and infrared radiation heating; The heating method of the electric heating wire and the electric heating tube is as follows: the electric heating wire or the electric heating tube is installed inside the core mold and outside the combined outer mold for heating; The hot air heating method is: blowing hot air into the hollow part of the core mold for heating; The infrared radiation heating method is as follows: infrared heaters are installed inside the core mold and outside the combined outer mold to perform infrared radiation heating; During the heating process, the temperature of the core mold and the combined outer mold is maintained between 30 and 40°C.

[0014] In some embodiments, the fiber is at least one of glass fiber, carbon fiber, basalt fiber, aramid fiber, and high molecular weight polyethylene fiber.

[0015] In some embodiments, the resin is at least one of an epoxy resin, a polyester resin, and a vinyl resin.

[0016] Beneficial effects: The composite boom forming mold provided by the present application has the following advantages: the core mold and the outer mold of the mold can realize the precise shaping of the inner and outer surfaces of the boom, complete the precise control of the external dimensions of the composite boom, the inner and outer surfaces of the product are smooth, the surface treatment time is reduced, a large amount of manual intervention is not required, the degree of automation is high, and production costs are saved; the inner and outer molds are connected to the heating device, and the mold temperature is increased to reduce the resin viscosity, so that excess resin is discharged and the resin content is reduced, thereby realizing the control of the glue content of the composite boom and improving the overall mechanical properties of the boom; after the mold is connected to the heating device, it has a heat preservation function, which can avoid the instability of the curing process caused by seasonal environmental temperature differences, and ensure the quality stability of the product manufacturing process; The present application provides a molding and use method of a composite boom molding mold with the following advantages: excess resin is extracted through external mold extrusion and vacuum negative pressure extraction, thereby reducing the resin content of the composite boom and improving the overall mechanical properties of the boom; the external mold force compaction treatment process and the vacuum bag molding process are integrated, and the external pressure of the external mold, the vacuum negative pressure of the vacuum bag and the mechanical vibration can all effectively promote the discharge of bubbles inside the fiber and resin, reduce internal pores, improve the density of the composite boom, reduce porosity, significantly reduce internal defects of the boom, and improve the mechanical properties of the boom; the boom body is formed by winding, and the winding process presets a certain tension on the fiber. Compared with paving molding, the fiber has no curling phenomenon, and can provide stress more efficiently in the composite structure, thereby ensuring the mechanical strength of the boom; the boom body is formed by winding and then vacuum bag negative pressure molding, without the need for manual scraping of glue, with a high degree of automation and high production efficiency, avoiding product quality problems caused by human factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the composite arm forming mold in the embodiment of the present application; Figure 2 This is a schematic diagram of the top view of the composite arm forming mold in an embodiment of the present application; Figure 3 AA cross-sectional structural diagram of the composite boom forming mold in the embodiment of the present application; Figure 4 This is a schematic diagram of the BB cross-sectional structure of the composite boom forming mold in the embodiment of the present application; Figure 5 This is a schematic diagram of the connection between the composite arm forming mold, the resin collector and the vacuum pump in the embodiment of the present application.

[0018] Among them: 1 core mold; 2 combined outer mold, 21 first half mold, 22 second half mold; 3 connection hole; 4 continuous fiber reinforced composite material; 5 vacuum bag, 51 first vacuum membrane, 52 second vacuum membrane; 6 guide tube, 61 first guide hole, 62 second guide hole; 7 resin collector; 8 vacuum pump; 9 catheter. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0020] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are used only to explain the relative positional relationships and movement of components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. These terms are used solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application.

[0022] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0024] In order to solve the problems of high material and labor costs for composite boom molding, low overall strength and rigidity of the boom, low degree of automation in the manufacturing process, high requirements for personnel operating skills, and unsuitability for mass industrial production, the present application provides a composite boom molding mold and molding method. The mold can realize precise shaping of the boom, control size, improve performance, save costs, and ensure the quality stability of the product manufacturing process in an environment with changing temperature; the molding method can reduce the resin content of the boom material, reduce the porosity, improve the overall mechanical properties of the boom, have a high degree of automation, and high production efficiency.

[0025] Example 1: Figures 1 to 4 As shown, this embodiment provides a composite boom forming mold, comprising a core mold 1, a combined outer mold 2, and a vacuum bag 5 comprising a first vacuum film 51 and a second vacuum film 52; The core mold 1 is a hollow structure, with a hollow channel extending through the center along the length direction; a first guide hole 61 is provided on the core mold 1, which passes through the inner and outer surfaces of the core mold and is connected to the hollow channel; The core mold 1 is placed inside the combined outer mold 2, and the vacuum bag 5 is located between the core mold 1 and the combined outer mold 2; The first vacuum film 51 is coated on the outer surface of the core mold 1, and the second vacuum film 52 is coated on the inner surface of the combined outer mold 2. The first vacuum film 51 and the second vacuum film 52 are sealed and connected at both ends by a sealing member to form a vacuum bag 5. A second guide hole 62 corresponding to the position of the first guide hole 61 is opened on the first vacuum film 51; the second guide hole 62 is used to seal and connect one end of the guide tube 6, and the other end of the guide tube 6 can pass through the first guide hole 61 and extend from the hollow channel of the core mold 1 to the outside of the core mold.

[0026] In some embodiments, the seal may be a sealing tape.

[0027] In some embodiments, as Figures 1 to 4 As shown, the first guide holes 61 are evenly arranged along the length direction of the core mold 1, and a plurality of the first guide holes 61 can also be evenly arranged along the circumference of the core mold 1, so as to evenly guide the resin extruded during the molding process.

[0028] In some embodiments, the combined outer mold 2 is formed by splicing two or more half molds, each half mold is provided with a connecting hole 3, and the half molds are fastened and spliced ​​through the connecting holes 3 with connecting parts to form a combined outer mold 2 with a specific size and shape.

[0029] In this embodiment, the connecting hole 3 may be a bolt hole, and correspondingly, the connecting member is a bolt.

[0030] like Figure 1、 Figure 3 As shown, in this embodiment, the combined outer mold 2 is formed by splicing two identical first half molds 21 and second half molds 22. Furthermore, in this embodiment, the connecting piece fixes the first half mold 21 and the second half mold 22 via the connecting hole 3 to form the combined outer mold 2.

[0031] like Figure 4 As shown, the outer periphery of the cross section of the core mold 1 is square, and the interior of the combined outer mold 2 forms a hollow square main structure. Therefore, the cross section of the vacuum bag 5 located between the combined outer mold 2 and the core mold 1 is a square ring structure.

[0032] In some embodiments, there are a plurality of first guide holes 61 , which are arranged at intervals, and the distance between adjacent first guide holes 61 is no more than 0.3 to 1 m. The diameter of the first guide holes 61 is 5 to 30 mm.

[0033] In this embodiment, the distance between adjacent first guide holes 61 is 0.35 m, and the diameter of the first guide holes 61 is 10 mm.

[0034] In this embodiment, the core mold 1 and the combined outer mold 2 are made of high-strength steel Q345.

[0035] In some embodiments, the material of the first vacuum film 51 and the second vacuum film 52 is selected from at least one of polyamide, polyester, and polyolefin.

[0036] In this embodiment, the first vacuum film 51 and the second vacuum film 52 are made of polyamide film.

[0037] In some embodiments, the material of the flow guide tube 6 is selected from at least one of PE and silicone rubber.

[0038] In this embodiment, the flow guide tube 6 is made of PE material.

[0039] Example 2: This example provides a method for forming a composite boom, based on the composite boom forming mold described in Example 1, the method comprising: S1. Tightly cover the outer surface of the core mold 1 with the first vacuum film 51 so that the first guide holes 61 on the core mold correspond to the second guide holes 62 on the first vacuum film 51; S2. Seal one end of the guide tube 6 with the second guide hole 62 and align it flush with the outer surface of the core mold 1. Pass the other end of the guide tube 6 through the first guide hole 61 and extend it out of the hollow channel inside the core mold 1. S3, tightly covering the outer side of the first vacuum film 51 on the surface of the core mold 1 with breathable felt and release cloth in sequence; Winding carbon fibers impregnated with epoxy resin onto a core mold 1 covered with air-permeable felt and release cloth at a preset tension and angle until a suitable thickness is achieved, thereby forming a continuous fiber-reinforced composite material 4; Vibrate core mold 1 to expel internal bubbles at a frequency of 50 to 100 Hz for 5 minutes; S4. Tightly lay the second vacuum film 52 on the continuous fiber reinforced composite material 4; connect each side of the first vacuum film 51 to the corresponding sides of the second vacuum film 52 with sealing tape to form a vacuum bag 5. The continuous fiber reinforced composite material 4, the breathable felt, and the release cloth are wrapped in the vacuum bag 5; S5, such as Figure 5 As shown, the guide tube 6 extending from the core mold 1 is extended into the epoxy resin collector 7, and then the epoxy resin collector 7 and the vacuum pump 8 are connected by a conduit 9. The guide tube 6 and the conduit 9 do not contact the epoxy resin in the epoxy resin collector 7; Connect the vacuum pump 8 to the air source and evacuate the vacuum bag 5 to preliminarily shape the arm support. The vacuum degree is set to -0.05 MPa. S6. Install the connecting piece on the connecting hole 3 to connect the first outer mold 21 and the second outer mold 22; Connect the core mold 1 and the combined outer mold 2 to the heating device respectively, connect the combined outer mold 2 to the infrared heater, and blow hot air into the inner hollow channel of the core mold 1 to heat the core mold 1 and the combined outer mold 2 to 30-40°C; S7. Increase the vacuum degree of the vacuum pump 8 to -0.1 MPa, alternately squeeze the combined outer mold 2, and evacuate until the mold is closed. Tighten the connector inserted into the reserved connection hole 3 to tighten the combined outer mold 2. After the mold is closed, continue evacuating for 10 minutes and turn off the vacuum pump 8. S8, remove the infrared heater connected to the combined outer mold 2, place the entire mold into a curing oven, and cure the arm according to a predetermined curing curve; S9, remove the combined outer mold 2, vacuum bag 5, breathable felt and release cloth, and then perform surface treatment.

[0040] In some embodiments, the fiber is at least one of glass fiber, carbon fiber, basalt fiber, aramid fiber, and high molecular weight polyethylene fiber.

[0041] The fiber selected in this embodiment is carbon fiber.

[0042] In some embodiments, the resin is at least one of an epoxy resin, a polyester resin, and a vinyl resin.

[0043] The resin selected in this embodiment is epoxy resin.

[0044] To sum up, the composite boom forming mold provided by the present application can achieve precise shaping of the inner and outer surfaces of the boom and precise control of the size of the boom, reduce the resin content of the finished product, and improve the overall mechanical properties of the boom; the molding and use method of the composite boom forming mold provided by the present application can reduce the resin content of the composite boom, reduce the porosity, and improve the overall mechanical properties of the boom. The molding process has a high degree of automation, high production efficiency, and the quality of the finished product is less affected by human factors.

[0045] The above embodiment is merely a general scheme of the present invention. The core mold and outer mold shapes can be adjusted accordingly based on actual needs. While the above embodiment has described the present invention and its advantages in detail, it should be understood that those skilled in the art may make various changes, substitutions, and modifications without departing from the spirit and scope of the present invention as defined by the appended claims.

[0046] The technical means disclosed in the present application are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. The above disclosure of the present application is based on preferred embodiments, but it is not intended to limit the present application. Any technical solution obtained by equivalent substitution or equivalent transformation falls within the scope of protection of the present application.

Claims

1. A composite boom forming mold, characterized in that: include: A core mold (1), a combined outer mold (2), and a vacuum bag (5) comprising a first vacuum film (51) and a second vacuum film (52); The core mold (1) is a hollow structure, with a hollow channel extending through the center along the length direction; a first flow guide hole (61) is provided on the core mold (1), penetrating the inner and outer surfaces of the core mold and communicating with the hollow channel; The core mold (1) is placed inside the combined outer mold (2), and the vacuum bag (5) is located between the core mold (1) and the combined outer mold (2); The first vacuum film (51) is coated on the outer surface of the core mold (1), and the second vacuum film (52) is coated on the inner surface of the combined outer mold (2). The first vacuum film (51) and the second vacuum film (52) are sealed and connected at both ends by sealing members to form a vacuum bag (5); The first vacuum film (51) is provided with a second flow guide hole (62) corresponding to the position of the first flow guide hole (61); the second flow guide hole (62) is used to seal and connect one end of the flow guide tube (6), and the other end of the flow guide tube (6) can pass through the corresponding first flow guide hole (61) and then extend from the hollow channel of the core mold (1) to the outside of the core mold (1).

2. The composite boom forming mold according to claim 1, characterized in that: The combined outer mold (2) is formed by splicing two or more half molds; each half mold is provided with a connecting hole (3), and the half molds are fastened and spliced ​​via connecting pieces through the connecting holes (3) to form the combined outer mold (2).

3. The composite boom forming mold according to claim 1, characterized in that: The aperture of the first flow guide hole (61) is larger than the aperture of the second flow guide hole (62).

4. The composite boom forming mold according to claim 1, characterized in that: The first guide holes (61) are multiple and arranged at intervals; The distance between adjacent first flow guide holes (61) is no greater than 0.3 to 1 m, and the diameter of the first flow guide hole (61) is 5 to 30 mm.

5. The composite boom forming mold according to claim 1, characterized in that: The core mold (1) and the combined outer mold (2) are made of high-strength steel Q345; And / or, the material of the first vacuum film (51) and the second vacuum film (52) is selected from at least one of polyamide, polyester, and polyolefin; And / or, the guide tube is made of at least one material selected from PE and silicone rubber.

6. A method for forming a composite boom, characterized in that: Based on the composite boom forming mold according to any one of claims 1 to 5, the method comprises: S1, coating the outer surface of the core mold (1) with a first vacuum film (51), so that the first guide hole on the core mold corresponds to the second guide hole on the first vacuum film; S2, sealingly connecting one end of the flow guide tube (6) to the second flow guide hole (62) and flushing it with the outer surface of the core mold, and passing the other end of the flow guide tube (6) through the first flow guide hole (61) on the core mold (1) and extending it out from the hollow channel of the core mold (1); S3, after laying a breathable felt and a demoulding cloth on the first vacuum film (51), winding the fiber impregnated with resin, and vibrating the core mold (1) to expel bubbles; S4, laying a second vacuum film (52) on the fiber impregnated with resin, and sealingly connecting the first vacuum film (51) and the second vacuum film (52) at the two ends corresponding to each other through a sealing member to form a vacuum bag (5); S5, connecting the other end of the guide tube (6) to a vacuum pump (8) with a resin collector (7), the resin collector (7) and the vacuum pump (8) are connected via a conduit (9), and the vacuum bag (5) is evacuated by the vacuum pump (8) to preliminarily shape the boom, with the vacuum degree set to -0.05 to -0.08 MPa; S6, installing the combined outer mold (2), and connecting the core mold (1) and the combined outer mold (2) to the heating device respectively; S7, increasing the vacuum degree of the vacuum pump to -0.08 to -0.1 MPa, extruding the combined outer mold (2) alternately, and evacuating until the mold is closed, and continuing to evacuate after the mold is closed; S8, removing the heating device, and placing the entire mold into a curing furnace to cure the arm frame into shape; S9. Remove the combined outer mold, vacuum bag, breathable felt and release cloth and perform surface treatment.

7. The method for forming a composite boom according to claim 6, characterized in that: The vibration frequency of the vibrating core mold (1) to expel the internal bubbles is 50 to 100 Hz, and the vibration duration is 5 to 10 minutes.

8. The method for forming a composite boom according to claim 6, characterized in that: The heating method for the core mold (1) is selected from one of electric heating wire heating, electric heating tube heating, and hot air heating; the heating method for the combined outer mold (2) is selected from one of electric heating wire heating, electric heating tube heating, and infrared radiation heating; The heating method of the electric heating wire and the electric heating tube is: the electric heating wire or the electric heating tube is installed inside the core mold and outside the combined outer mold for heating; The hot air heating method is: blowing hot air into the hollow channel of the core mold for heating; The infrared radiation heating method is: installing infrared heaters inside the core mold and outside the combined outer mold to perform infrared radiation heating; During the heating process, the temperature of the core mold and the combined outer mold is maintained between 30 and 40°C.

9. The method for forming a composite boom according to claim 6, characterized in that: The fiber is at least one of glass fiber, carbon fiber, basalt fiber, aramid fiber, and high molecular polyethylene fiber.

10. The method for forming a composite boom according to claim 6, characterized in that: The resin is at least one of epoxy resin, polyester resin and vinyl resin.

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