A carbon fiber anti-bulging hollow tube

Abstract

The present invention discloses a carbon fiber anti-bulging hollow tube, comprising a UD carbon fiber cloth layer, a resin-impregnated glass fiber felt layer, a glass fiber surface felt layer, and a 3K carbon fiber shell, which are sequentially coated from the inside out; the UD carbon fiber cloth layer is a plurality of stacked layers, the resin-impregnated glass fiber felt layer is overlapped and coated on the outside of the UD carbon fiber cloth layer, and the glass fiber surface felt layer is wound and coated on the outside of the resin-impregnated glass fiber felt layer; the 3K carbon fiber shell comprises a first shell body and a second shell body that are spliced ​​together. The resin-impregnated glass fiber felt layer and the glass fiber surface felt layer can both play a role in guiding air, so that the internal gas is discharged out of the 3K carbon fiber shell through the gas guiding effect of the resin-impregnated glass fiber felt layer and the glass fiber surface felt layer, thereby avoiding the accumulation of air between the UD carbon fiber cloth layer and the 3K carbon fiber shell, and can be well combined with the UD carbon fiber cloth layer and the 3K carbon fiber shell, without affecting the structural strength of the UD carbon fiber cloth layer and the 3K carbon fiber shell.

Description

Technical Field

[0001] The present invention relates to the field of carbon fiber hollow tubes, and in particular to a carbon fiber anti-bulging hollow tube. Background Art

[0002] Carbon fiber hollow tubes are hollow tubes that are lighter than solid tubes and are commonly used in products such as bicycles and automobiles.

[0003] In the prior art, Chinese patent ZL201821923673.4 discloses a new energy vehicle exhaust pipe joint, in which the pipe wall of the main pipe and the side pipe is laminated from the outer layer to the inner layer, namely the outer 3K carbon fiber layer, the middle UD cloth layer and the inner 3K carbon fiber layer. The layer structure of the 3K carbon fiber layer and the UD cloth layer is prone to bulging during the production process, which will affect the appearance and quality of the product. Common causes of bulging include: 1. The gap between the 3K carbon fiber shell and the UD cloth layer. Poor exhaust performance causes gas to be stored between the 3K carbon fiber shell and the UD cloth layer and cannot be discharged, which in turn causes local bulges in the 3K carbon fiber shell; 2. When the operator stacks the UD cloth, the layers are not tight, or the mold temperature is too high. When the gas in the inner layer of the UD cloth is discharged to the middle, the surface UD cloth layer has hardened, and the gas is retained in the UD cloth layer and cannot be discharged. In other words, the exhaust performance between the multiple UD cloth layers is poor, which indirectly causes local bulges in the 3K carbon fiber shell; therefore, how to reduce the bulging rate of carbon fiber hollow tubes is a key research direction in the industry.

[0004] Therefore, it is necessary to design a new technical solution to solve the above problems. Summary of the Invention

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a carbon fiber anti-bulging hollow tube, which is provided with a resin-impregnated glass fiber felt layer and a glass fiber surface felt layer between the UD carbon fiber cloth layer and the 3K carbon fiber shell. The resin-impregnated glass fiber felt layer and the glass fiber surface felt layer can both play a role in air conduction, so that the internal gas is discharged out of the 3K carbon fiber shell through the air conduction effect of the resin-impregnated glass fiber felt layer and the glass fiber surface felt layer, thereby avoiding the accumulation of gas between the UD carbon fiber cloth layer and the 3K carbon fiber shell, and can be well combined with the UD carbon fiber cloth layer and the 3K carbon fiber shell, without affecting the structural strength of the UD carbon fiber cloth layer and the 3K carbon fiber shell, and the structural design is ingenious.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A carbon fiber anti-bulging hollow tube, comprising a UD carbon fiber cloth layer, a resin-impregnated glass fiber felt layer, a glass fiber surface felt layer, and a 3K carbon fiber shell, sequentially coated from the inside out; wherein:

[0008] The UD carbon fiber cloth layer is composed of several stacked layers, the resin-impregnated glass fiber felt layer is overlapped and coated on the outside of the UD carbon fiber cloth layer, and the glass fiber surface felt layer is wound and coated on the outside of the resin-impregnated glass fiber felt layer. The 3K carbon fiber shell includes a first shell body and a second shell body spliced ​​to each other. The arrangement of the resin-impregnated glass fiber felt layer and the glass fiber surface felt layer can play a role in air guidance, so that the internal gas is discharged out of the 3K carbon fiber shell through the air guidance effect of the resin-impregnated glass fiber felt layer and the glass fiber surface felt layer, thereby avoiding air accumulation between the UD carbon fiber cloth layer and the 3K carbon fiber shell, and can be well combined with the UD carbon fiber cloth layer and the 3K carbon fiber shell, without affecting the structural strength of the UD carbon fiber cloth layer and the 3K carbon fiber shell, and the structural design is ingenious.

[0009] As a preferred solution, each UD carbon fiber cloth layer is constructed by at least one piece of UD carbon fiber cloth. The amount of UD carbon fiber cloth used in each UD carbon fiber cloth layer is determined according to the cross-sectional area of ​​the hollow tube. When the cross-sectional area of ​​the hollow tube is large, two pieces of UD carbon fiber cloth can be spliced ​​and covered. When the cross-sectional area of ​​the hollow tube is small, one piece of UD carbon fiber cloth can be used for covering.

[0010] As a preferred solution, a plurality of air holes are provided through the UD carbon fiber cloth. The provision of the plurality of air holes improves the exhaust performance of the UD carbon fiber cloth and prevents gas from being retained between the multiple layers of UD carbon fiber cloth.

[0011] As a preferred solution, the resin-impregnated glass fiber felt layer is composed of at least one piece of resin-impregnated glass fiber felt. The number of resin-impregnated glass fiber felts used is determined according to the cross-sectional area of ​​the hollow pipe. When the cross-sectional area of ​​the hollow pipe is large, two pieces of resin-impregnated glass fiber felts can be spliced ​​and covered. When the cross-sectional area of ​​the hollow pipe is small, one piece of resin-impregnated glass fiber felt can be used for covering.

[0012] As a preferred solution, it also includes a detachable core material component, and the UD carbon fiber cloth layer is coated on the outside of the detachable core material component. The setting of the detachable core material component can assist in the molding of the carbon fiber anti-bulging hollow tube, and can be removed after the carbon fiber anti-bulging hollow tube is formed.

[0013] As a preferred solution, the releasable core material assembly includes a core material and a vacuum bag and a releasable film that are sequentially wrapped around the core material. The releasable film is wrapped around the outside of the vacuum bag, and the UD carbon fiber cloth layer is wrapped around the outside of the releasable film. The setting of the releasable film makes the releasable core material assembly smoother and flatter, which facilitates the stacking of the UD carbon fiber cloth layer.

[0014] As a preferred solution, the releasable film is a high-temperature resistant cling film.

[0015] As a preferred solution, the core material is EPS.

[0016] As a preferred solution, the resin-impregnated glass fiber felt layer is an epoxy resin-impregnated glass fiber felt layer.

[0017] As a preferred solution, the glass fiber surface felt layer is a wet-laid non-woven E glass fiber surface felt.

[0018] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0019] The main feature is that a resin-impregnated glass fiber felt layer and a glass fiber surface felt layer are arranged between the UD carbon fiber cloth layer and the 3K carbon fiber shell. The resin-impregnated glass fiber felt layer and the glass fiber surface felt layer can both play a role in air conduction, so that the internal gas is discharged out of the 3K carbon fiber shell through the air conduction effect of the resin-impregnated glass fiber felt layer and the glass fiber surface felt layer, thereby avoiding the accumulation of gas between the UD carbon fiber cloth layer and the 3K carbon fiber shell, and can be well combined with the UD carbon fiber cloth layer and the 3K carbon fiber shell, without affecting the structural strength of the UD carbon fiber cloth layer and the 3K carbon fiber shell. The structural design is ingenious.

[0020] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a schematic diagram of the general structure of the preferred embodiment of the present invention (excluding the releasable core component);

[0022] Figure 2 This is a schematic diagram of the structure of a preferred embodiment of the present invention (including a releasable core component);

[0023] Figure 3 Schematic diagram of a UD carbon fiber cloth according to a preferred embodiment of the present invention;

[0024] Figure 4 This is an application diagram of a preferred embodiment 1 of the present invention;

[0025] Figure 5 It is a schematic structural diagram of the preferred embodiment 2 of the present invention (including a releasable core material component).

[0026] Description of the accompanying drawings:

[0027] 10. Separable core material component 11. Core material

[0028] 12. Vacuum bag 13. Release film

[0029] 20. UD carbon fiber cloth layer 21. UD carbon fiber cloth

[0030] 211, air holes 30, resin-impregnated glass fiber felt layer

[0031] 31. Resin-impregnated glass fiber mat 40. Glass fiber surface mat layer

[0032] 50. 3K carbon fiber shell 51. First shell

[0033] 52. Second outer shell. DETAILED DESCRIPTION

[0034] First of all, it should be noted that in the description of the present invention, the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0035] Please refer to Figures 1 to 5 As shown, it shows the specific structure of various preferred embodiments of the present invention, including a releasable core material component 10 and a UD carbon fiber cloth layer 20, a resin-impregnated glass fiber felt layer 30, a glass fiber surface felt layer 40, and a 3K carbon fiber shell 50 that sequentially cover the releasable core material component 10 from the inside out.

[0036] The releasable core assembly 10 includes a core material and a vacuum bag 12 and a releasable film 13 sequentially wrapped around the core material 11. The releasable film 13 is wrapped around the vacuum bag 12. The provision of the releasable core assembly 10 can assist in the molding of the carbon fiber anti-bulging hollow tube. The carbon fiber anti-bulging hollow tube can be removed after molding. The provision of the releasable film 13 makes the releasable core assembly 10 smoother and flatter, facilitating the stacking of the UD carbon fiber cloth layer 20.

[0037] Specifically, the core material 11 is made of EPS, and the contour shape of the core material 11 is determined according to the contour shape of the carbon fiber anti-bulging hollow tube. The vacuum bag 12 is a mature product in the field of carbon fiber production and manufacturing. The vacuum bag 12 is sleeved on the outside of the core material 11 according to the contour shape of the core material 11. The releasable film 13 is a high-temperature resistant cling film. The high-temperature resistant cling film is an existing known technology and is usually used to wrap food for microwave heating. It can be purchased.

[0038] The UD carbon fiber cloth layer 20 is coated on the outside of the releasable film 13. The UD carbon fiber cloth layer 20 is a plurality of stacked layers. Specifically, each UD carbon fiber cloth layer 20 is formed by at least one piece of UD carbon fiber cloth 21. The number of UD carbon fiber cloths 21 used in each UD carbon fiber cloth layer 20 is determined based on the cross-sectional area of ​​the hollow tube. When the cross-sectional area of ​​the hollow tube is large, two pieces of UD carbon fiber cloth 21 can be used for the coating. When the cross-sectional area of ​​the hollow tube is small, only one piece of UD carbon fiber cloth 21 can be used for the coating.

[0039] Preferably, a plurality of air holes 211 are provided through the UD carbon fiber cloth 21, and the plurality of air holes 211 are evenly distributed on the UD carbon fiber cloth 21. The provision of the plurality of air holes 211 improves the exhaust performance of the UD carbon fiber cloth 21 and prevents gas from being retained between the multiple UD carbon fiber cloth layers 20.

[0040] The resin-impregnated glass fiber felt layer 30 is overlapped and coated on the outside of the UD carbon fiber cloth layer 20; specifically, the resin-impregnated glass fiber felt layer 30 is composed of at least one piece of resin-impregnated glass fiber felt 31, and the number of resin-impregnated glass fiber felts 31 used is determined according to the cross-sectional area of ​​the hollow tube. When the cross-sectional area of ​​the hollow tube is large, two pieces of resin-impregnated glass fiber felts 31 can be spliced ​​and coated, and when the cross-sectional area of ​​the hollow tube is small, one piece of resin-impregnated glass fiber felt 31 can be used for coating; preferably, the resin-impregnated glass fiber felt layer 30 is a glass fiber felt layer impregnated with epoxy resin, and the glass fiber felt impregnated with epoxy resin is an existing known material and can be purchased from Heyuan Xuanyang Fiber Material Technology Co., Ltd.

[0041] The glass fiber surface felt layer 40 is wrapped around the resin-impregnated glass fiber felt layer 30. Preferably, the glass fiber surface felt layer 40 is a wet-laid non-woven E-glass fiber surface felt. The wet-laid non-woven E-glass fiber surface felt is an existing known material that is compatible with a variety of resins and can be purchased from Technical Fibre Products Ltd.

[0042] The 3K carbon fiber shell 50 includes a first shell body 51 and a second shell body 52 spliced ​​together. Specifically, the first shell body 51 and the second shell body 52 are respectively located on the upper surface and the lower surface of the glass fiber surface felt layer 40. The first shell body 51 and the second shell body 52 are both formed by 3K prepreg cloth. After forming, they are CNC cut into a predetermined shape.

[0043] During production and application, the structure of this carbon fiber anti-bulging hollow tube can be used in carbon fiber automobile roll cages.

[0044] The design emphasis of the present invention is:

[0045] The main feature is that a resin-impregnated glass fiber felt layer and a glass fiber surface felt layer are arranged between the UD carbon fiber cloth layer and the 3K carbon fiber shell. The resin-impregnated glass fiber felt layer and the glass fiber surface felt layer can both play a role in air conduction, so that the internal gas is discharged out of the 3K carbon fiber shell through the air conduction effect of the resin-impregnated glass fiber felt layer and the glass fiber surface felt layer, thereby avoiding the accumulation of gas between the UD carbon fiber cloth layer and the 3K carbon fiber shell, and can be well combined with the UD carbon fiber cloth layer and the 3K carbon fiber shell, without affecting the structural strength of the UD carbon fiber cloth layer and the 3K carbon fiber shell. The structural design is ingenious.

[0046] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A carbon fiber anti-bulging hollow tube, characterized in that: It includes UD carbon fiber cloth layer, resin-impregnated glass fiber felt layer, glass fiber surface felt layer, and 3K carbon fiber shell from the inside out; among them: The UD carbon fiber cloth layer is a plurality of stacked layers, each UD carbon fiber cloth layer being constructed by at least one piece of UD carbon fiber cloth, the UD carbon fiber cloth being provided with a plurality of ventilation holes, the resin-impregnated glass fiber felt layer being laminated and coated on the outside of the UD carbon fiber cloth layer, the glass fiber surface felt layer being wrapped and coated on the outside of the resin-impregnated glass fiber felt layer, and the 3K carbon fiber shell comprising a first shell body and a second shell body spliced ​​together; It also includes a releasable core material component, the UD carbon fiber cloth layer is coated on the outside of the releasable core material component, the releasable core material component includes a core material and a vacuum bag and a releasable film that are sequentially coated on the outside of the core material, the releasable film is wrapped around the outside of the vacuum bag, and the UD carbon fiber cloth layer is coated on the outside of the releasable film.

2. The carbon fiber anti-bulging hollow tube according to claim 1, characterized in that: The resin-impregnated glass fiber mat layer is constructed by at least one piece of resin-impregnated glass fiber mat.

3. The carbon fiber anti-bulging hollow tube according to claim 1, characterized in that: The releasable film is a high-temperature resistant fresh-keeping film.

4. The carbon fiber anti-bulging hollow tube according to claim 1, characterized in that: The core material is EPS.

5. The carbon fiber anti-bulging hollow tube according to claim 1, characterized in that: The resin-impregnated glass fiber felt layer is a glass fiber felt layer impregnated with epoxy resin.

6. The carbon fiber anti-bulging hollow tube according to claim 1, characterized in that: The glass fiber surface felt layer is a wet-laid non-woven E glass fiber surface felt.

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