Prepreg cloth processing device and method for carbon fiber tube

Abstract

The invention relates to the technical field of prepreg cloth processing and forming, in particular to a carbon fiber tube prepreg cloth processing device which comprises a vacuum bag with two open ends. Mounting seats are arranged at the two ends of the core rod and can fix the open end of the vacuum bag, an air guide groove is formed in the inner surface of at least one mounting seat, and an air guide valve is arranged on the outer side of the position, corresponding to the air guide groove, of the mounting seat; the air guide template comprises a hollow air guide rod and arc-shaped plates connected to the two sides of the air guide rod, the arc-shaped plates are arranged to be elastically-deformable arc-shaped plates, and air guide holes are formed in the air guide rod in the length direction of the air guide rod at intervals; when the air guide rod is installed on the lower side of the core rod, the arc-shaped plate can extend to the outer side of the core rod, the end of the air guide rod can extend to the air guide groove, and when the core rod and the air guide template are sleeved with the vacuum bag, the arc-shaped plate can be compressed and drawn close to the center of the core rod. According to the invention, by optimizing the arrangement of the gas guide template, the procedures of prepreg coating and vacuumizing are adjusted, and the problems in the prior art are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of prepreg processing and molding, and in particular to a prepreg processing device and a processing method for a carbon fiber tube. Background Art

[0002] The use of carbon fiber tubes is increasing in some pressure-transporting conduits. Currently, the main methods for processing carbon fiber tubes are autoclave curing and compression molding. Compression molding requires a split-tube mold and internally machined venting grooves and mold surfaces. This places high demands on mold precision and processing costs, and specialized clamping and lifting tools are required for closing and opening the mold. This makes mold manipulation difficult for long tubular structures.

[0003] The autoclave curing process requires laying prepreg and mold spacer cloth on the outside of the core rod. A vacuum bag is then placed over the core rod using sealing strips for evacuation. After evacuation is complete, the bag is held for a certain period (maintaining a vacuum level above -0.09 MPa). The entire system is then transferred to the autoclave for hot pressing. This molding method presents several challenges. Due to the long length of the tubular structure, the vacuum bag is not uniform along the length of the tube during evacuation. This results in the bag closing first near the mouth, followed by low vacuum efficiency and unstable vacuum quality at the distal end. This requires an extended evacuation time to ensure molding quality (some conditions require 50 to 90 minutes). Because tubular structures tend to close first near the mouth, using high negative pressure to quickly increase the vacuum level can significantly increase the pressure on the prepreg near the mouth, leading to uneven molding on the prepreg surface. Therefore, compressing the vacuum bag evacuation time is difficult when machining this type of tubular structure.

[0004] To ensure molding quality, the prepreg should be transferred to the autoclave 14 within 15 minutes after vacuuming. If the vacuumed material needs to be temporarily stored, it must be kept in a vacuum environment of ≤25°C (for no more than 2 hours to prevent pre-curing of the resin).

[0005] At present, the applicant has installed both ends of the core rod on a special bracket, and rotated the core rod to quickly coordinate and complete the prepreg laying, mold separation cloth laying, and breathable felt laying operations. In order to improve the utilization efficiency of the autoclave and the special bracket, the applicant expects to optimize the operation time so that the two core rods processed in succession by a single set of special brackets can be cured and formed in the same batch by the autoclave. Due to the storage time limit (within 2h) of the material to be cured after the first piece is vacuumed, the operation time of each process of the second core rod is relatively tight. After deducting the time required to meet the vacuuming standard, there is less time for prepreg laying, mold separation cloth laying, and breathable felt laying. It is difficult to ensure the operation quality of each process while compressing the operation time. Based on this, the present application proposes a prepreg processing device and processing method for carbon fiber tubes. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a carbon fiber tube prepreg processing device and processing method, which effectively solves the problems existing in the prior art by optimizing the setting of the air guide template and adjusting the prepreg coating and vacuuming processes.

[0007] In order to solve the above problems, the present invention provides a prepreg processing device for carbon fiber tubes, comprising: a vacuum bag, wherein the vacuum bag is configured as a cylindrical structure, and both ends of the vacuum bag are open; a core rod, wherein both ends of the core rod form support ends, the support ends are provided with mounting seats, the mounting seats can fix the open ends of the vacuum bag, and the inner surface of at least one of the mounting seats is provided with an air guide groove, and the mounting seat is provided with an air guide valve on the outside corresponding to the position of the air guide groove; an air guide template, wherein the air guide template includes a hollow air guide rod and an arc-shaped plate connected to both sides of the air guide rod, the arc-shaped plate is configured as an elastically deformable arc-shaped plate, and the air guide rod is provided with air guide holes at intervals along its length direction; when the air guide rod is installed on the lower side of the core rod, the arc-shaped plate can extend to the outside of the core rod, and the end of the air guide rod can extend to the air guide groove, and when the vacuum bag is sleeved on the core rod and the outside of the air guide template, the arc-shaped plate can be compressed toward the center of the core rod.

[0008] Furthermore, the bottom of the arc-shaped plate is detachably connected to the air guide rod.

[0009] Furthermore, the inner surface of the gas guide rod is configured to be arc-shaped, a slot is provided on the edge of the gas guide rod, and the edge of the arc plate is folded to form a connecting rib that can be inserted into the slot.

[0010] Furthermore, the air guide template also includes an upper support rod, the inner surface of the upper support rod is arranged to be arc-shaped, and guide grooves are respectively provided on both sides of the upper support rod; when the air guide rod is arranged on the lower side of the core rod and the upper support rod is arranged on the upper side of the core rod, the upper edge of the arc plate can extend to the guide groove.

[0011] Alternatively, when the air guide rod is installed on the lower side of the core rod, the upper edge of the arc-shaped plate can extend to the upper side of the core rod, and the upper edges of the two arc-shaped plates can be staggered and stacked.

[0012] Alternatively, the air guide template also includes an upper support rod, and elastically deformable upper plates are respectively provided on both sides of the upper support rod, and the upper plates are arranged in an arc shape. When the upper support rod is arranged on the upper side of the core rod and the air guide rod is arranged on the lower side of the core rod, the upper plate and the arc plate are arranged to overlap.

[0013] Furthermore, a connecting tube extending into the air guide groove is formed at the outer end of the air guide rod, the connecting tube is concave toward the surface of the core rod, and the connecting tube is sleeved with a rubber block, which is interference-inserted into the air guide groove.

[0014] Furthermore, the mounting seat includes a seat body connected to the core rod and a clamping body connected to the seat body. The seat body includes an inner clamping ring and an outer flange arranged on the outside of the inner clamping ring. The clamping body includes an inner flange that can be connected to the outer flange and an outer clamping ring arranged on the inside of the outer flange. The inner clamping ring and the outer clamping ring can clamp and fix the vacuum bag.

[0015] The present invention also provides a method for processing a prepreg tube, based on the above-mentioned carbon fiber tube prepreg processing device, the processing method includes: Provide a dedicated bracket that can support the mounting base, an autoclave, and a storage area located on one side of the autoclave. The storage area can meet the temperature requirements within the set temperature range. S1. Install the mounting bases at both ends of the core rod A on a dedicated bracket, and lay prepreg on the surface of the core rod A; S2. Lay release cloth on the surface of the prepreg, and cover the surface of the release cloth with breathable felt; S3. Place the air guide rod under the core rod A, and wrap the curved plate around the outside of the breathable felt to complete the arrangement of the air guide template on the core rod A. S4. Place a vacuum bag on the outside of the core rod A and the breathable template, and evacuate the bag through the air guide valve of the mounting seat; S5. Separate the mounting bases at both ends of the core rod A from the dedicated brackets, and transfer the core rod A to a storage area where vacuum is continuously applied; S6. Install the mounting bases at both ends of the core rod B on a dedicated bracket. Lay prepreg on the surface of the core rod B, lay release cloth on the surface of the prepreg, and cover the surface of the release cloth with breathable felt. S7. Place the air guide rod under the core rod B, and wrap the curved plate around the outside of the breathable felt to complete the arrangement of the air guide template on the core rod B. S8. Place a vacuum bag on the outside of the core rod B and the breathable template, and evacuate the bag through the air guide valve of the mounting seat; S9. After the core rod B position is vacuumed for the set time, the mounting bases at both ends of the core rod B are separated from the dedicated brackets, and the core rod B and core rod A are placed together in the autoclave for hot pressing.

[0016] Furthermore, before S1, vacuum bags are pre-installed on the core rod A and the core rod B, and one end of the vacuum bag is pre-installed on a mounting seat corresponding to one end of the core rod.

[0017] The beneficial effect of the present invention is that, by optimizing the setting of the air guide template and adjusting the prepreg covering and vacuuming process, the problems existing in the prior art are effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a structural schematic diagram of a processing device according to an embodiment of the present invention installed behind a dedicated bracket.

[0019] Figure 2 for Figure 1 A schematic diagram of the partial structure of the mounting seat position in the illustrated embodiment.

[0020] Figure 3 for Figure 1 A schematic diagram of the local structure at one end of the air guide template in the illustrated embodiment.

[0021] Figure 4 for Figure 1 The schematic diagram of the structure of the mounting base after decomposition in the embodiment shown is shown.

[0022] Figure 5 for Figure 1 The diagram shows a lateral cross-sectional structure of a partial vacuum bag at the center line of the core rod after both ends of the bag are fixed.

[0023] Figure 6 for Figure 5 Schematic diagram of the locally enlarged structure at point A in the middle.

[0024] Figure 7 for Figure 1The illustrated embodiment is a schematic cross-sectional view of the core rod after the air guide template is installed.

[0025] Figure 8 For another embodiment of the present invention, refer to Figure 7 Schematic diagram of the structure of the part.

[0026] Figure 9 For another embodiment of the present invention, refer to Figure 7 Schematic diagram of the structure of the part.

[0027] Figure 10 The figure is a schematic diagram of a working station of the processing method of the present invention.

[0028] Among them: 1. Vacuum bag; 2. Core rod; 3. Mounting seat; 301. Seat body; 3011. Inner clamping ring; 3012. Outer flange; 302. Clamping body; 3021. Outer clamping ring; 3022. Inner flange; 4. Air guide groove; 5. Air guide valve; 6. Air guide rod; 7. Arc plate; 701. Connecting rib; 8. Slot; 9. Upper support rod; 10. Guide groove; 11. Upper plate; 12. Connecting pipe; 13. Rubber block; 14. Autoclave; 15. Storage area; 16. Special bracket; 17. Bracket; 18. Automatic tape laying machine. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0030] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0031] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 a limitation on the present invention.

[0032] In the present invention, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integration; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or interactions between two components. However, the phrase "direct connection" indicates that the two connected entities are not connected through an intermediate structure, but are connected only through a connecting structure to form a whole. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0034] In the present invention, Figure 1-9 As shown, a prepreg processing device for carbon fiber tubes is provided, comprising a vacuum bag 1, wherein the vacuum bag 1 is configured as a cylindrical structure, and both ends of the vacuum bag 1 are open; a core rod 2, wherein both ends of the core rod 2 form support ends, and the support ends are provided with mounting seats 3, and the mounting seats 3 can fix the open ends of the vacuum bag 1, and the inner surface of at least one of the mounting seats 3 is provided with an air guide groove 4, and the mounting seat 3 is provided with an air guide valve 5 on the outer side corresponding to the position of the air guide groove 4; an air guide template, wherein the air guide template includes a central An empty air guide rod 6 and an arc-shaped plate 7 connected on both sides of the air guide rod 6. The arc-shaped plate 7 is set to be an elastically deformable arc-shaped plate 7. The air guide rod 6 is provided with air guide holes at intervals along its length direction. When the air guide rod 6 is installed on the lower side of the core rod 2, the arc-shaped plate 7 can extend to the outside of the core rod 2, and the end of the air guide rod 6 can extend to the air guide groove 4. When the vacuum bag 1 is sleeved on the outside of the core rod 2 and the air guide template, the arc-shaped plate 7 can be compressed toward the center of the core rod 2.

[0035] During operation of the processing device of the present invention, one end of the vacuum bag 1 is pre-installed on one of the mounting seats 3, and the entire core rod 2 is then moved to a dedicated bracket, which supports and erects the mounting seat 3. At this point, prepreg, mold spacer, and breathable felt can be laid on the surface of the core rod 2 (prepreg laying can be performed with the cooperation of an ATL automatic belt laying machine 18, or manually). The air guide rod 6 of the air guide template is then placed on the lower side of the core rod 2, and the curved plate 7 is wrapped around the outer side of the breathable felt. The vacuum bag 1 is pulled to the other mounting seat 3 and fixed, so that the two mounting seats 3 and the vacuum bag 1 are combined to form an enclosed space. At this point, the core rod 2 can be moved to a storage area 15 (preferably a constant temperature area with a temperature of less than or equal to 25°) by moving the mounting seats 3 at both ends of the core rod 2. It is then connected to an external vacuum device through the air guide valve 5 for vacuum storage, waiting to enter the autoclave 14 for curing (the waiting time should not exceed 2 hours). After the core rod 2 on the top of the special bracket is hoisted away, a new core rod 2 can be hoisted to the special bracket for stacking. The processing device of the present invention has the following technical effects: First, the present invention sets up an air guide template, which can use the air guide rod 6 to evenly provide negative pressure extraction in the length direction of the core rod 2 during vacuuming. Compared with the existing method of installing the air nozzle on the vacuum bag 1, the present invention can effectively prevent the vacuum bag 1 from being pressed closed. The quality of vacuuming can be improved and the time of vacuuming can be reduced.

[0036] Secondly, the present invention provides an air guide template, which can provide stable and uniform support for the core rod 2 at the bottom of the core rod 2. In this way, when the core rod 2 is moved to the storage area 15, in the autoclave 14, and when stored in the storage area 15 and the autoclave 14, it is convenient for external supporting objects (such as brackets) to be supported in the middle section of the core rod 2 through the air guide template, thereby facilitating the movement of the core rod 2 and preventing the middle section of the core rod 2 from sagging and deformation. The air guide template can prevent the supporting objects from causing indentations on the prepreg fabric during molding.

[0037] Thirdly, the present invention provides an elastically deformable arc plate 7, which can gradually and evenly press the arc plate 7 against the outside of the stacked breathable felt during the vacuuming process of the vacuum bag 1, so that the pressing force transmitted by the vacuum bag 1 to the prepreg can be transmitted through the arc plate 7. The inner surface of the arc plate 7 is relatively smooth and flat. Compared with the working condition that the vacuum bag 1 transmits pressure through the breathable felt and the mold isolation cloth, the present invention can prevent the uneven pressure of the prepreg layout caused by local wrinkles of the vacuum bag 1, thereby reducing the occurrence of irregular prepreg forming caused by this. In addition, since the surface of the arc plate 7 is smooth and flat, the air permeability between the arc plate 7 and the breathable felt is better than that between the breathable felt and the vacuum bag 1 during the breathable felt pressing process, thereby further improving the vacuuming efficiency of the vacuum bag 1.

[0038] Fourthly, the present invention adopts an elastically deformable metal plate. Compared with the molded template, a lighter stainless steel sheet (thickness between 1-3 mm) can be used. The deformation ability of the metal plate can be used to apply pressure using the vacuum bag 1 to achieve a regular molding effect. The weight of the air-guide template can also be reduced. The air-guide template can be manually lifted and installed, which improves the efficiency of disassembly and assembly of the air-guide template. The arc plate 7 can also be used to protect the workpiece after vacuuming to protect the stacked covering when it is bumped during the transportation process.

[0039] Fifth, the present invention can complete the arrangement of the vacuum bag 1 between the two mounting seats 3. Compared with the method of putting the vacuum bag 1 on the entire core rod 2 and then sealing and evacuating the air, the present invention does not need to put the core rod 2 on the inner side of the vacuum bag 1 as a whole from both ends of the core rod 2, which reduces the operation difficulty and bagging time, and also reduces the possibility of the vacuum bag 1 being bumped and damaged during the transfer process.

[0040] In this invention, the provision of an air-guiding template reduces the time required to achieve vacuum pumping standards. By optimizing the placement of the vacuum bag 1, the installation difficulty and time required for setting up the vacuum bag 1 are reduced. This allows two core rods 2 to be laid up consecutively on a single support frame and hot-pressed in the same autoclave 14. The following describes the timing using a specific embodiment as an example.

[0041]

[0042] In the table above, process times marked with "≤" are calculated based on the maximum time. When core rod A completes the "transfer to storage area 15" process, core rod B is placed in the support frame and begins operation. Through the time allocation shown in the table above, t2 has a relatively ample operating time. At the same time, after the t2 operating time is compressed, the operating time for the vacuuming standard time can be increased, thereby further improving the vacuuming quality. It is not difficult to see from this that the present invention can reasonably arrange the time of each process so that two core rods processed in succession on the same support frame can be placed in the same autoclave 14 for curing.

[0043] The traditional hot pressing forming operation of vacuum bag 1 is described in the following table. As can be seen from the table, due to the long installation and vacuuming time of vacuum bag 1, the time reserved for t2 is short, making it difficult to provide sufficient time to ensure

[0044] Regarding the structure of the present invention, Figures 1 to 9In the illustrated embodiment, more specifically, the bottom of the curved plate 7 is detachably connected to the gas rod 6. This arrangement allows the gas rod 6 and the curved plate 7 to function as separate structures, allowing for differentiated placement of the gas rod 6 and the curved plate 7. In a specific embodiment, the gas rod 6 can be constructed of a high-strength aluminum alloy rod-shaped structure, which maintains a regular shape on the top surface of the gas rod 6 while also being lightweight and easy to process. The curved plate 7 can be constructed of stainless steel.

[0045] exist Figures 1 to 9 In the embodiment shown, for the structure of the present invention, more specifically, the inner surface of the air guide rod 6 is set to be arc-shaped, the edge of the air guide rod 6 is provided with a slot 8, and the edge of the arc plate 7 is folded to form a connecting rib 701 that can be inserted into the slot 8. Figures 1 to 3 As shown, by setting the inner surface of the air guide rod 6 into an arc shape, the inner surface of the air guide rod 6 can stably and regularly support the covering on the surface side of the core rod 2. By adopting the connection rib 701 and the slot 8 to cooperate with each other, during assembly, the air guide rod 6 can be moved to the lower side of the core rod 2 first, and then the connection rib 701 at the lower edge of the arc plate 7 is inserted into the slot 8 and fixed, so that the top surface of the air guide rod 6 and the inner surface of the arc plate 7 are initially attached to the surface side of the covering.

[0046] In a preferred embodiment, the arrangement of the curved plate 7 is further described in detail, when the air guide rod 6 is installed on the lower side of the core rod 2, the upper edge of the curved plate 7 can extend to the upper side of the core rod 2, and the upper edges of the two curved plates 7 can be staggered and stacked. Figure 8 As shown, the tops of the two curved plates 7 are staggered and stacked to fully enclose the object being covered. When the vacuum bag 1 is evacuated and the curved plates 7 are compressed, portions of the two curved plates 7 can shift relative to each other, compressing the object inward. This arrangement provides ample room for movement at the upper edges of the curved plates 7, allowing them to quickly deform upward and conform to the surface of the object being covered when the vacuum bag 1 compresses them.

[0047] In an optional embodiment, the upper edge of the arc plate 7 can be arranged as shown in the figure. The air guide template further includes an upper support rod 9, the inner surface of the upper support rod 9 is arranged in an arc shape, and guide grooves 10 are respectively provided on both sides of the upper support rod 9; when the air guide rod 6 is arranged on the lower side of the core rod 2 and the upper support rod 9 is arranged on the upper side of the core rod 2, the upper edge of the arc plate 7 can extend to the guide groove 10. Figure 7As shown, when installing the air guide template, the upper edge of the curved plate 7 can be inserted into the guide groove 10 to initially fix the upper edge of the curved plate 7, so that the outer side of the air guide template is regular, thereby facilitating the fitting of the vacuum bag 1 over the outer side of the covering of the core rod 2. When the vacuum bag 1 is evacuated and compressed, the friction between the upper edge of the curved plate 7 and the groove wall of the guide groove 10 is reduced, allowing the upper edge of the curved plate 7 to move more flexibly when compressed and deformed, thereby preventing the upper edge of the curved plate 7 from vibrating the air felt.

[0048] Regarding the installation of the upper support rod, in a preferred embodiment, the bottom surface of the support rod can be set to an arc shape, and the support rod can be directly placed on the top of the covering; or a slot for the upper support rod to be inserted can be set on the mounting seat 3, and the upper support rod can be inserted into the slot.

[0049] In an alternative embodiment, it can also be configured as follows: the air guide template further includes an upper support rod 9, and elastically deformable upper plates 11 are respectively provided on both sides of the upper support rod 9. The upper plates 11 are configured in an arc shape. When the upper support rod 9 is arranged on the upper side of the core rod 2 and the air guide rod 6 is arranged on the lower side of the core rod 2, the upper plates 11 and the arc plates 7 are overlapped. Figure 9 As shown, the upper support rod is configured as a circular tube. The upper plates on either side of the upper support rod are integrally structured and positioned in the middle of the two upper plates. Mounting seats are provided at both ends of the upper support rod with positioning slots for the upper support rods. Both the curved plate 7 and the upper plate 11 are configured as curved structures with a central angle of approximately 90° (±10°), further reducing the weight of a single curved plate 7 and facilitating installation. Furthermore, the upper plates 11 and 7 overlap on either side of the core rod, allowing the upper plates 11 and 7 on either side of the core rod to shift inward relative to each other during vacuum bag 1 evacuation. This further enhances the flexibility of the curved plates 7 and 11 in terms of contraction and deformation, preventing the curved plates 7 and 11 from being hindered in their circumferential deformation along the core rod 2, thereby ensuring uniform adhesion of the curved plates 7 and 11 to the coating and improving the quality of prepreg molding.

[0050] exist Figures 1 to 9 In the embodiment shown, for the structure of the present invention, to be more specific, the outer end of the air guide rod 6 is formed with a connecting tube 12 extending into the air guide groove 4, the connecting tube 12 is concave toward the surface of the core rod 2, and the connecting tube 12 is sleeved with a rubber block 13, and the rubber block 13 is interference inserted into the air guide groove 4.

[0051] like Figure 3 and Figure 6As shown, the provision of rubber blocks 13 allows the air guide rod 6 to be initially secured within the air guide groove 4 when installed beneath the core rod 2, thereby stabilizing its position. As the vacuum bag 1 contracts, the portion of the rubber blocks 13 on the outer side of the connecting tube 12 facing the core rod 2 can be compressed and deformed, bringing the air guide rod 6 closer to the core rod 2. Furthermore, by filling the air guide groove 4 with rubber blocks 13, the vacuum bag 1 is protected from irregular compression deformation within the air guide groove 4, potentially causing damage from the edges of the groove 4, during vacuum compression.

[0052] exist Figure 1 In the embodiment shown, for the structure of the present invention, to be more specific, the mounting seat 3 includes a seat body 301 connected to the core rod 2, and a clamping body 302 connected to the seat body 301, the seat body 301 includes an inner clamping ring 3011, and an outer flange 3012 arranged on the outside of the inner clamping ring 3011, the clamping body 302 includes an inner flange 3022 that can be connected to the outer flange 3012, and an outer clamping ring 3021 arranged on the inner side of the outer flange 3012, the inner clamping ring 3011 and the outer clamping ring 3021 can clamp and fix the vacuum bag 1.

[0053] like Figure 4 As shown, the outer surface of the clamping body 302 is conical. When installing and securing the vacuum bag 1, the end of the vacuum bag 1 can be placed on the outer side of the inner clamping ring 3011. The clamping body 302 is then moved toward the base 301, so that the vacuum bag 1 is clamped and secured between the inner clamping ring 3011 and the outer clamping ring 3021. The inner flange 3022 is connected to the outer flange 3012 to further enhance the securing effect of the vacuum bag 1. In the illustrated embodiment, to ensure the sealing effect of the clamping and securing of the vacuum bag 1 between the inner clamping ring 3011 and the outer clamping ring 3021, a sealing groove is provided on the outer surface of the inner clamping ring 3011, and a sealing ring is secured in the sealing groove.

[0054] In an embodiment of the present invention, the method for fixing the vacuum bag 1 on the mounting seat 3 is not limited to the method of the seat body 301 and the clamping body 302 shown in the figure. In an optional embodiment, other methods can also be used, such as using a clamp to fix the vacuum bag 1 at the position of the clamping body 302.

[0055] exist Figure 1 In the embodiment shown, in order to facilitate the pre-installation of the vacuum bag 1 on the mounting seat 3 and the demoulding after molding, preferably, at least one mounting seat 3 and the core rod 2 are arranged in a detachable manner, specifically as follows Figure 1 and Figure 2As shown, six through holes are set on the outer end surface of the mounting seat 3, and six threaded holes are set on the corresponding end surface of the core rod 2. Three of the through holes are set as countersunk through holes, and the mounting seat 3 is fixed to the core rod 2 by bolts at the countersunk through hole position.

[0056] The arrangement of the mounting base 3 on the dedicated bracket 16 is not an improvement point of the present invention, and is described below with an example. Preferably, Figure 1 and Figure 2 As shown, three of the six through holes on the outer surface of the base body 301 are non-counter-sunk through holes. The base body 301 can be fixed to the dedicated bracket 16 by bolts at the three non-counter-sunk through holes. The dedicated bracket 16 can be a rotating bracket as shown in the figure. The two rotating brackets are arranged opposite each other and each has a rotatable connecting shaft. The inner end of the connecting shaft is provided with a connecting plate. The connecting plate is connected and fixed to the base body 301 at the three non-counter-sunk through hole positions.

[0057] The present invention also provides a method for processing prepreg pipes, based on the above-mentioned processing device, referring to Figure 10 The workstation arrangement shown in FIG. 1 is described, wherein reference numeral 18 is an automatic tape placement machine for placing prepreg on a core rod. The processing method includes a prepreg processing device for a carbon fiber tube according to any one of claims 1 to 8, the processing method including: A dedicated bracket 16 capable of supporting the mounting base 3, an autoclave 14, and a storage area 15 located on one side of the autoclave 14 are provided. The storage area 15 can meet the temperature within the set temperature range. S1. Install the mounting bases 3 at both ends of the core rod A on the dedicated bracket 16, and lay prepreg on the surface of the core rod A; S2. Lay release cloth on the surface of the prepreg, and cover the surface of the release cloth with breathable felt; S3. Place the air guide rod under the core rod A, and wrap the curved plate 7 around the outside of the breathable felt to complete the arrangement of the air guide template at the core rod A. S4, put the vacuum bag 1 on the core rod A and the outer side of the breathable template, and evacuate the air through the air guide valve 5 of the mounting seat 3; S5. Separate the mounting bases 3 at both ends of the core rod A from the dedicated bracket 16 and transfer the core rod A to the storage area 15 where it is continuously vacuumed. like Figure 9 As shown, the storage area 15 is provided with two brackets 17 , the core rod A is placed on the lower bracket 17 , and the core rod B is retained on the dedicated support 16 for processing.

[0058] S6. Install the mounting bases 3 at both ends of the core rod B on the dedicated bracket 16. Lay prepreg on the surface of the core rod B, lay release cloth on the surface of the prepreg, and cover the surface of the release cloth with breathable felt. S7, the air guide rod is placed on the lower side of the core rod B, and the curved plate 7 is wrapped around the outside of the breathable felt to complete the arrangement of the air guide template at the core rod B; S8, put the vacuum bag 1 on the outside of the core rod B and the breathable template, and evacuate the air through the air guide valve 5 of the mounting seat 3; S9. After the core rod B is vacuumed for the set time, the mounting bases 3 at both ends of the core rod B are separated from the dedicated brackets 16, and the core rod B and the core rod A are placed together in the autoclave 14 for hot pressing.

[0059] like Figure 9 As shown, the core rod B can be moved to the bracket 17 on the upper side of the storage area 15 and then moved to the autoclave 14 through the storage area 15 .

[0060] In a preferred embodiment, in order to further reduce the time of vacuuming the vacuum bag 1, before S1, the vacuum bag 1 is pre-installed on the core rod A and the core rod B, and one end of the vacuum bag 1 is pre-installed on the mounting seat 3 at one end of the corresponding core rod.

[0061] It should be noted that regarding the temperature control of the storage area 15, in a preferred embodiment, the entire workplace can be temperature-controlled within a set temperature range, and the storage area 15 only provides the bracket 17 for storing the core rods A. Alternatively, a movable cover can be provided, which is placed over the storage area 15 and equipped with a heating wire or a heat dissipation fan to adjust the temperature within the cover. The cover can also be moved by an overhead crane.

[0062] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0063] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A carbon fiber tube prepreg processing device, characterized in that: include: A vacuum bag, wherein the vacuum bag is configured as a cylindrical structure with both ends of the vacuum bag open; A core rod, wherein both ends of the core rod form support ends, and the support ends are provided with mounting seats, and the mounting seats are capable of fixing the open end of the vacuum bag, and the inner surface of at least one of the mounting seats is provided with an air guide groove, and the mounting seat is provided with an air guide valve on the outer side corresponding to the position of the air guide groove; An air guide template, comprising a hollow air guide rod and arc-shaped plates connected to both sides of the air guide rod, wherein the arc-shaped plates are configured to be elastically deformable, and the air guide rod is provided with air guide holes spaced apart along its length direction; When the air guide rod is installed on the lower side of the core rod, the arc plate can extend to the outside of the core rod, and the end of the air guide rod can extend to the air guide groove. When the vacuum bag is installed on the outside of the core rod and the air guide template, the arc plate can be compressed toward the center of the core rod.

2. The carbon fiber tube prepreg processing device according to claim 1, characterized in that: The bottom of the arc-shaped plate is detachably connected to the air guide rod.

3. The carbon fiber tube prepreg processing device according to claim 2, characterized in that: The inner surface of the gas guide rod is arranged in an arc shape, a slot is provided at the edge of the gas guide rod, and the edge of the arc plate is folded to form a connecting rib that can be inserted into the slot.

4. The carbon fiber tube prepreg processing device according to any one of claims 1 to 3, characterized in that: The air guide template further includes an upper support rod, the inner surface of the upper support rod is arranged in an arc shape, and guide grooves are respectively provided on both sides of the upper support rod; When the air guide rod is arranged at the lower side of the core rod and the upper support rod is arranged at the upper side of the core rod, the upper edge of the arc plate can extend to the guide groove.

5. The carbon fiber tube prepreg processing device according to any one of claims 1 to 3, characterized in that: When the air guide rod is installed on the lower side of the core rod, the upper edge of the arc plate can extend to the upper side of the core rod, and the upper edges of the two arc plates can be staggered and stacked.

6. The carbon fiber tube prepreg processing device according to any one of claims 1 to 3, characterized in that: The air guide template also includes an upper support rod, and elastically deformable upper plates are respectively provided on both sides of the upper support rod. The upper plates are arranged in an arc shape. When the upper support rod is arranged on the upper side of the core rod and the air guide rod is arranged on the lower side of the core rod, the upper plate and the arc plate are arranged to overlap.

7. The carbon fiber tube prepreg processing device according to claim 1, characterized in that: The outer end of the air guide rod is formed with a connecting pipe extending into the air guide groove. The connecting pipe is concave toward the surface of the core rod, and the connecting pipe is sleeved with a rubber block, which is interference-inserted into the air guide groove.

8. The carbon fiber tube prepreg processing device according to claim 5, characterized in that: The mounting seat includes a seat body connected to the core rod and a clamping body connected to the seat body. The seat body includes an inner clamping ring and an outer flange arranged on the outside of the inner clamping ring. The clamping body includes an inner flange connected to the outer flange and an outer clamping ring arranged on the inside of the outer flange. The inner clamping ring and the outer clamping ring can clamp and fix the vacuum bag.

9. A processing method, characterized in that: The carbon fiber tube prepreg processing device according to any one of claims 1 to 8, wherein the processing method comprises: Provide a dedicated bracket that can support the mounting base, an autoclave, and a storage area located on one side of the autoclave. The storage area can meet the temperature requirements within the set temperature range. S1. Install the mounting bases at both ends of the core rod A on a dedicated bracket, and lay prepreg on the surface of the core rod A; S2. Lay release cloth on the surface of the prepreg, and cover the surface of the release cloth with breathable felt; S3. Place the air guide rod under the core rod A, and wrap the curved plate around the outside of the breathable felt to complete the arrangement of the air guide template on the core rod A. S4. Place a vacuum bag on the outside of the core rod A and the breathable template, and evacuate the bag through the air guide valve of the mounting seat; S5. Separate the mounting bases at both ends of the core rod A from the dedicated brackets, and transfer the core rod A to a storage area where vacuum is continuously applied; S6. Install the mounting bases at both ends of the core rod B on a dedicated bracket. Lay prepreg on the surface of the core rod B, lay release cloth on the surface of the prepreg, and cover the surface of the release cloth with breathable felt. S7. Place the air guide rod under the core rod B, and wrap the curved plate around the outside of the breathable felt to complete the arrangement of the air guide template on the core rod B. S8. Place a vacuum bag on the outside of the core rod B and the breathable template, and evacuate the bag through the air guide valve of the mounting seat; S9. After the core rod B position is vacuumed for the set time, the mounting bases at both ends of the core rod B are separated from the dedicated brackets, and the core rod B and core rod A are placed together in the autoclave for hot pressing.

10. The processing method according to claim 9, characterized in that: Before S1, vacuum bags are pre-installed on core rod A and core rod B, and one end of the vacuum bag is pre-installed on a mounting seat corresponding to one end of the core rod.

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