Supporting structure of inner cavity of carbon fiber part

Abstract

The utility model discloses a supporting structure of an inner cavity of a carbon fiber part. The supporting structure comprises an air pipe, a core part, an embedded part and a fixing part. The surface of the air pipe, the surface of the core part and the surface of the fixing part are all coated with demolding layers. The core body part is fixed with the peripheral side surface of the air pipe in a fitting and contact manner; the embedded part is fixed on the peripheral side surface of the core body part; one end of the fixing piece abuts against the inner embedded piece, and the fixing piece is matched with the core body piece to limit the inner embedded piece. An air pipe, a core part, an embedded part and a fixing part are fixedly assembled together, then the surface of the air pipe, the core part, the embedded part and the fixing part are coated with at least one layer of carbon fiber cloth in a matched mode, the air pipe, the core part, the embedded part and the fixing part are placed in a mold, mold closing and pressing are conducted, hot air is blown to the air pipe to form a carbon fiber part structure, and after the air pipe, the core part, the embedded part and the fixing part are taken down, the carbon fiber part with an inner cavity can be obtained. The preparation method is simple, the forming time is short, the supporting structure can be taken out without being soaked and loosened, and the large consumption of labor and time cost is avoided.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber molding technology, and in particular to a support structure for the inner cavity of a carbon fiber part. Background Technology

[0002] Carbon fiber refers to high-strength, high-modulus fibers with a carbon content of over 90%, boasting the highest temperature resistance among all synthetic fibers. It is produced from acrylic and viscose fibers through high-temperature oxidation and carbonization. Carbon fiber is an excellent material for manufacturing high-tech equipment in aerospace and other applications. Primarily composed of carbon, carbon fiber possesses properties such as high-temperature resistance, friction resistance, thermal conductivity, and corrosion resistance. It has a fibrous, flexible shape and can be processed into various fabrics. Due to its graphite microcrystalline structure with preferred orientation along the fiber axis, it exhibits very high strength and modulus along the fiber axis. The main application of carbon fiber is as a reinforcing material, combined with resins, metals, ceramics, and carbon to create advanced composite materials. Carbon fiber reinforced epoxy resin composites have the highest specific strength and specific modulus among existing engineering materials.

[0003] Currently, the main molding processes for carbon fiber composites include injection molding, vacuum casting, pressure vessel molding, and compression molding. Due to the difficulty in mold preparation and demolding methods, these molding processes mostly produce simple rod-shaped or bar-shaped carbon fiber composite parts, making it difficult to mold products with internal cavities. Existing technologies often utilize water-soluble inner cores as supports. For example, Chinese patent CN202310982672 discloses a method for molding irregularly shaped carbon fiber parts with large inner cavities and small outer openings. This method uses an organic solvent to form a thin film on the surface of a water-soluble supporting inner core. After molding, the core is soaked in water, and after it softens and loosens, it is removed while the outer film remains, ultimately forming the inner cavity. This method is complex and time-consuming, resulting in high labor and time costs. Therefore, it is necessary to propose a new solution to address these problems. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a support structure and molding method for the inner cavity of carbon fiber parts, which can effectively solve the problems of complex preparation methods, long molding time, and large consumption of labor and time costs in the existing carbon fiber products with inner cavities.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A support structure for the inner cavity of a carbon fiber component includes a duct, a core component, an embedded component, and a fixing component; the surfaces of the duct, the core component, and the fixing component are all coated with a release layer; the core component is in contact with and fixed to the peripheral side of the duct; the embedded component is fixed to the peripheral side of the core component; one end of the fixing component abuts against the embedded component, and the fixing component and the aforementioned core component cooperate to limit the embedded component.

[0007] As a preferred embodiment, the core component has a slot on its peripheral side, which matches and is fixed to the peripheral side of the air duct.

[0008] As a preferred embodiment, the slot is an arc-shaped slot, which increases the contact area between the slot and the duct, resulting in a more secure and reliable fit.

[0009] As a preferred embodiment, a limiting groove is formed on the peripheral side of the core component, and the embedded part is fixedly positioned within the limiting groove.

[0010] As a preferred embodiment, the embedded part has a first fixing hole, and the fixing part has a second fixing hole that cooperates with the external fixing mechanism. The second fixing hole is a through hole and is directly opposite to and communicates with the first fixing hole.

[0011] As a preferred embodiment, both the first and second fixing holes are screw holes, and the external fixing mechanism is a screw. Fixing with screws can make the limiting effect of the fixing component on the embedded body more reliable.

[0012] As a preferred embodiment, the core component is made of silicone.

[0013] A method for forming the inner cavity of a carbon fiber part includes the following steps:

[0014] (1) A release agent is pre-applied to the surface of the air duct, core components and fasteners to form a release layer;

[0015] (2) The core component is attached to the periphery of the duct and fixed in place. Then the embedded component is fixed on the periphery of the core component. Next, one end of the fixing component is pressed against the embedded component. The fixing component and the aforementioned core component cooperate to limit the embedded component, so as to form the support structure of the aforementioned carbon fiber component cavity.

[0016] (3) At least one layer of carbon fiber cloth is wrapped around the support structure of the inner cavity of the carbon fiber part obtained in step (2). Then, it is placed in the molding mold and pressed and hot air is blown into the air pipe to form the carbon fiber part structure.

[0017] (4) Remove the air duct, core component, embedded component and fixing component from the carbon fiber component structure obtained in step (3) to obtain a carbon fiber component with an inner cavity.

[0018] As a preferred embodiment, the hot air temperature in step (2) is 140-150℃ and the duration of the hot air is 60min.

[0019] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0020] By assembling the duct, core component, embedded component, and fixing component together, and then covering its surface with at least one layer of carbon fiber cloth, placing it in a mold, pressing it with the mold closed, and blowing hot air onto the duct to form a carbon fiber component structure, a carbon fiber component with an internal cavity can be obtained after removing the duct, core component, embedded component, and fixing component. The preparation method is simple, the molding time is short, and the support structure can be removed without soaking and loosening, which will not cause a large amount of labor and time costs.

[0021] To more clearly illustrate the structural features and effects of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments: Attached Figure Description

[0022] Figure 1 This is a three-dimensional assembly diagram of a preferred embodiment of the present invention;

[0023] Figure 2 This is an exploded view of a preferred embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of a preferred embodiment of the present invention;

[0025] Figure 4 This is a three-dimensional schematic diagram of the carbon fiber component structure in this utility model;

[0026] Figure 5 This is a three-dimensional schematic diagram of a carbon fiber component with an inner cavity in this utility model;

[0027] Figure 6 This is a cross-sectional view of the carbon fiber component with an inner cavity in this utility model.

[0028] Explanation of reference numerals in the attached diagram:

[0029] 10. Air duct; 20. Core component

[0030] 21. Card slot; 22. Limiting slot

[0031] 30. Embedded part; 31. First fixing hole

[0032] 40. Fastener; 41. Second fixing hole. Detailed Implementation

[0033] Please refer to Figures 1 to 3As shown, the specific structure of a preferred embodiment of the present invention is illustrated, including a duct 10, a core component 20, an embedded component 30, and a fixing component 40; the surfaces of the duct 10, the core component 20, and the fixing component 40 are all coated with a release layer (not shown in the figure).

[0034] The core component 20 is in contact with and fixed to the peripheral side of the duct 10. In this embodiment, a slot 21 is provided on the peripheral side of the core component 20. The slot 21 matches and is fixed to the peripheral side of the duct 10. Specifically, the slot 21 is an arc-shaped slot, which makes the contact area between the slot 21 and the duct 10 larger and the fit more firmly and reliably. In addition, a limiting groove 22 is provided on the peripheral side of the core component 20. The core component 20 is made of silicone.

[0035] The embedded part 30 is fixed on the peripheral side of the core part 20; in this embodiment, the embedded part 30 is embedded in the limiting groove 22 for fixed positioning; and the embedded part 30 is provided with a first fixing hole 31, which is a screw hole.

[0036] One end of the fastener 40 abuts against the embedded part 30. The fastener 40 and the aforementioned core part 20 cooperate to limit the embedded part 30. In this embodiment, the fastener 40 is provided with a second fixing hole 41 that cooperates with the external fixing mechanism. The second fixing hole 41 is a through hole and is directly opposite to and communicates with the first fixing hole 31. The second fixing hole 41 is a screw hole. The external fixing mechanism is a screw. By fixing with screws, the limiting effect of the fastener 40 on the embedded part 30 can be made more reliable.

[0037] This utility model also discloses a method for forming the inner cavity of a carbon fiber part, which includes the following steps:

[0038] (1) A release agent is pre-applied to the surface of the air duct, core components and fasteners to form a release layer.

[0039] (2) The core component is attached to the periphery of the duct and fixed in place. Then the embedded component is fixed on the periphery of the core component. Next, one end of the fixing component is made to abut against the embedded component. The fixing component and the aforementioned core component cooperate to limit the embedded component, so as to form the support structure of the aforementioned carbon fiber component cavity.

[0040] (3) Cover the support structure of the inner cavity of the carbon fiber part obtained in step (2) with at least one layer of carbon fiber cloth, then place it in the molding mold and press it and blow hot air into the air pipe to form the carbon fiber part structure; specifically, the hot air temperature is 140-150℃ and the hot air duration is 60min.

[0041] (4) Remove the air duct, core component, embedded component and fixing component from the carbon fiber component structure obtained in step (3) to obtain a carbon fiber component with an inner cavity.

[0042] The key design feature of this invention is that by assembling the duct, core component, embedded component, and fixing component together, and then covering its surface with at least one layer of carbon fiber cloth, placing it in a mold, pressing it with the mold closed, and blowing hot air onto the duct to form a carbon fiber component structure, the carbon fiber component with an inner cavity can be obtained after removing the duct, core component, embedded component, and fixing component. The preparation method is simple, the molding time is short, and the support structure can be removed without soaking and loosening, thus avoiding a large amount of labor and time costs.

[0043] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A support structure for the inner cavity of a carbon fiber component, characterized in that: It includes a duct, a core component, an embedded component, and a fixing component; the surfaces of the duct, the core component, and the fixing component are all coated with a release layer; the core component is in contact with and fixed to the peripheral side of the duct; the embedded component is fixed to the peripheral side of the core component; one end of the fixing component abuts against the embedded component, and the fixing component and the aforementioned core component cooperate to limit the embedded component.

2. The support structure for the inner cavity of the carbon fiber component according to claim 1, characterized in that: The core component has a slot on its peripheral side, which matches and is fixed to the peripheral side of the air duct.

3. The support structure for the inner cavity of the carbon fiber component according to claim 2, characterized in that: The slot is an arc-shaped slot.

4. The support structure for the inner cavity of the carbon fiber component according to claim 1, characterized in that: A limiting groove is formed on the peripheral side of the core component, and the embedded part is fixedly positioned in the limiting groove.

5. The support structure for the inner cavity of the carbon fiber component according to claim 1, characterized in that: The embedded part has a first fixing hole, and the fixing part has a second fixing hole that cooperates with the external fixing mechanism. The second fixing hole is a through hole and is directly opposite to and communicates with the first fixing hole.

6. The support structure for the inner cavity of the carbon fiber component according to claim 5, characterized in that: Both the first and second fixing holes are screw holes, and the external fixing mechanism is a screw.

7. The support structure for the inner cavity of the carbon fiber component according to claim 1, characterized in that: The core component is made of silicone.

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