A tubular carbon fiber beam forming mold

Abstract

The utility model discloses a tubular carbon fiber beam forming die in the technical field of wind tunnel blade carbon fiber beam, including base, be provided with the upper beam female die on the base, be provided with the ribbed board between upper beam female die and base, be provided with the connecting plate on the upper beam female die, be provided with the side plate on the connecting plate, be provided with the cover on the side plate, be provided with the limit component between the side plate and connecting plate, the side plate and cover correspond setting. The utility model discloses through multiple positioning structure cooperation and cooperation, effectively solve the problem of the deviation of the traditional mould caused by the lack of positioning accuracy, and the embedding of the limit component and the convex block recess, improve the centring and stability of each part of the mould, increase the bonding strength of the product bonding surface, can ensure that the carbon fiber product is uniformly stressed in the hot-press forming process, avoid the uneven thickness or surface defects caused by misplacement, improve the consistency of product forming quality.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber beam technology for wind tunnel blades, and in particular to a molding die for tubular carbon fiber beams. Background Technology

[0002] With the development of wind tunnel blades, the structural forms of carbon fiber beams for wind tunnel blades have also become more diverse. Among them, non-uniform diameter closed square tubular carbon fiber beams have advantages over uniform diameter square tubular carbon fiber beams, including the ability to conform to the blade configuration and superior load-bearing performance. Currently, non-uniform diameter closed square tubular carbon fiber beams are mostly manufactured as integral components, which generally suffer from disadvantages such as difficult demolding, high production costs, complex processing, and long processing cycles. Furthermore, they place high demands on molding processes and production tooling.

[0003] According to the announcement number CN110654039B, a method for manufacturing a non-uniform diameter closed-type square tubular carbon fiber beam structure for unmanned aerial vehicles includes the following steps: 1) processing an upper female mold and a lower female mold; 2) processing an upper beam using the upper female mold; 3) processing a lower beam using the lower female mold; 4) gluing the upper beam and the lower beam together using an adhesive bonding fixture; 5) removing the adhesive bonding fixture to obtain the desired non-uniform diameter closed-type square tubular carbon fiber beam.

[0004] However, the carbon fiber beams manufactured using this method employ secondary bonding, resulting in insufficient bond strength. For thicker tubular beams, the secondary bonding surface faces difficulties under pressure. Furthermore, this method involves single-sided bonding, leading to a small bonding area and poor overall performance. Therefore, we propose a molding die for tubular carbon fiber beams. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a tubular carbon fiber beam forming mold. By setting up a combination mold for the carbon fiber beam structure, the produced carbon fiber beams can be manufactured through preforming and hot pressing, thereby achieving higher structural strength and improving the bonding strength of the carbon fiber beam connection surfaces.

[0006] The purpose of this utility model is achieved as follows: a tubular carbon fiber beam forming mold includes a base, an upper beam female mold is provided on the base, a rib is provided between the upper beam female mold and the base, a connecting plate is provided on the upper beam female mold, a side plate is provided on the connecting plate, a cover plate is provided on the side plate, a limiting component is provided between the side plate and the connecting plate, the side plate and the cover plate are correspondingly provided, a lifting ring is threadedly connected to the cover plate, the lower end of the base is hollowed out, and lifting lugs are provided on both sides of the base.

[0007] Optionally, there may be multiple ribs, and the multiple ribs are evenly distributed.

[0008] Optionally, the lengths of the upper beam female mold, side plate, and cover plate are consistent. The side plate is composed of multiple structures and has an opening and closing cavity. A baffle is screwed to the outer side of the side plate, and the baffle is correspondingly arranged with the side plate.

[0009] Optionally, the limiting component includes a limiting pin, the connecting plate has a limiting hole, one end of the limiting pin is inserted into the limiting hole, and the other end of the limiting pin is inserted into the side plate. The number of limiting components is multiple sets.

[0010] Optionally, a protrusion is provided on the side plate, and a groove is provided on the cover plate. The protrusion and the groove are correspondingly provided and fit together.

[0011] Optionally, the upper beam female mold, side plate and cover plate are fastened together to form a mold cavity, and the upper beam female mold, side plate and cover plate are all connected by bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Through the coordinated operation of multiple positioning structures, the problem of mold closing deviation caused by insufficient positioning accuracy in traditional molds is effectively solved. The limiting components combined with the interlocking of protrusions and grooves improve the centering and stability of each part of the mold, increase the bonding strength of the product joint surface, ensure that the carbon fiber products are subjected to uniform stress during hot pressing, avoid uneven thickness or surface defects caused by misalignment, and improve the consistency of product molding quality.

[0013] 2. By optimizing the assembly efficiency and ease of use of the mold, the shortcomings of complex disassembly and cumbersome adjustment in the existing technology are overcome. The modular limit components and standardized matching structure make the mold opening and closing smoother, reduce manual adjustment time, and reduce the wear of parts caused by repeated disassembly and assembly, thus extending the service life of the mold. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure provided by this utility model.

[0016] Figure 2 This is an exploded view of the overall structure provided by this utility model.

[0017] Figure 3 This is a schematic diagram of the cover plate structure provided by this utility model.

[0018] In the diagram: 1. Base; 11. Upper beam female mold; 12. Rib plate; 13. Lifting lug; 2. Connecting plate; 21. Limiting component; 22. Limiting pin; 23. Limiting hole; 3. Side plate; 31. Baffle; 32. Protrusion; 4. Cover plate; 41. Lifting ring; 42. Groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 3 The tubular carbon fiber beam forming mold shown includes a base 1, an upper beam female mold 11 on the base 1, a rib plate 12 between the upper beam female mold 11 and the base 1, a connecting plate 2 on the upper beam female mold 11, a side plate 3 on the connecting plate 2, a cover plate 4 on the side plate 3, a limit component 21 between the side plate 3 and the connecting plate 2, the side plate 3 and the cover plate 4 are correspondingly arranged, a lifting ring 41 is threadedly connected to the cover plate 4, the lower end of the base 1 is hollowed out, and lifting lugs 13 are provided on both sides of the base 1. The upper beam female mold 11, the side plate 3 and the cover plate 4 are fastened together to form a mold cavity, and the upper beam female mold 11, the side plate 3 and the cover plate 4 are all connected by bolts.

[0021] It should be noted that the tubular carbon fiber beam forming mold proposed in this utility model effectively solves the core problems in traditional secondary bonding processes, such as insufficient bonding strength, difficulty in applying pressure to the bonding surface, and limited bonding area, through a combined structural design.

[0022] Furthermore, through the coordinated cooperation of the upper beam female mold 11, rib plate 12, side plate 3 and cover plate 4, as well as the subsequent laying process and hot pressing process, uniform compaction and precise molding of carbon fiber material are achieved, which significantly improves the overall structural performance of tubular beam. The limiting component 21 of the combined mold can ensure the accurate positioning of fiber layup during the molding process and avoid the stress concentration problem caused by traditional single-sided bonding. The hollow structure of the base 1 and the setting of the lifting lug 13 reduce the weight of the mold and facilitate operation and handling. The matching design of the cover plate 4 and the lifting ring 41 optimizes the demolding process. Compared with the traditional method, this solution increases the effective bonding area and improves the pressure transmission path, which fundamentally improves the interfacial bonding strength of the carbon fiber beam. It is especially suitable for the continuous production of thick tubular beams. While ensuring the advantages of lightweight, it significantly improves the load-bearing reliability and fatigue life of the components, and provides a better process solution for the manufacturing of high-performance composite beams.

[0023] Specifically, there are multiple ribs 12, which are evenly distributed.

[0024] Furthermore, the uniformly distributed rib plate 12 structure optimizes pressure transmission while ensuring overall rigidity. At the same time, the multiple rib plates 12 are reasonably arranged along the axial direction, which effectively disperses the load stress during the molding process and ensures the uniform curing of carbon fiber material during hot pressing, improves the support stability of the mold, avoids local stress concentration, and provides a reliable guarantee for the high-quality molding of tubular beams.

[0025] Specifically, the lengths of the upper beam female mold 11, side plate 3 and cover plate 4 are the same. The side plate 3 is composed of multiple structures. The side plate 3 has an opening and closing cavity. The outer side of the side plate 3 is screwed to a baffle 31, which is set correspondingly to the side plate 3.

[0026] Furthermore, the upper beam female mold 11, side plate 3 and cover plate 4 adopt an equal length design to ensure that the carbon fiber prepreg is subjected to uniform stress during hot pressing and to avoid molding defects caused by length deviation. Side plate 3 adopts a modular combination structure, which enhances the flexibility and maintainability of the mold. At the same time, its internal cavity design reduces the overall weight while ensuring the necessary structural strength. The baffle 31 is fastened to the outside of the side plate 3 by screws to form a stable closed structure, which effectively prevents resin from overflowing and ensures uniform transmission of molding pressure, making the mold more convenient in the process of opening and closing the mold and demolding. At the same time, it ensures the molding quality of the inner and outer surfaces of the tubular beam, improves production efficiency and product consistency.

[0027] Specifically, the limiting component 21 includes a limiting pin 22, the connecting plate 2 has a limiting hole 23, one end of the limiting pin 22 is inserted into the limiting hole 23, and the other end of the limiting pin 22 is inserted into the side plate 3. The limiting component 21 is in multiple sets. The side plate 3 is provided with a protrusion 32, and the cover plate 4 is provided with a groove 42. The protrusion 32 and the groove 42 are correspondingly arranged and fit together.

[0028] Furthermore, the insertion structure of the limiting pin 22 with the connecting plate 2 and the side plate 3 ensures the accurate positioning of each component of the mold during the mold closing process, effectively preventing misalignment and deformation. The synergistic effect of multiple limiting components 21 significantly improves the overall alignment of the mold, enabling the carbon fiber layup to maintain stable molding during hot pressing and curing. The protrusion 32 on the side plate 3 and the groove 42 on the cover plate 4 adopt a complementary mating structure, forming a tight fit when the mold is closed, which further enhances the closing accuracy and rigidity of the mold. Furthermore, this multi-positioning mechanism can not only optimize the pressure transmission path and avoid uneven stress caused by assembly deviations, but also simplify the mold assembly and disassembly process and improve production efficiency. Meanwhile, the fitting design of the protrusion 32 and the groove 42 also plays an auxiliary sealing role, reducing resin flow and overflow, and ensuring the molding quality and dimensional consistency of the tubular beam.

[0029] In summary, the coordinated use of multiple positioning structures effectively solves the problem of mold closing deviation caused by insufficient positioning accuracy in traditional molds. The precise fit between the limiting pin 22 and the insertion hole, combined with the fitting design of the protrusion 32 and the groove 42, improves the centering and stability of each component of the mold, ensuring that the carbon fiber products are subjected to uniform force during the hot pressing process, avoiding uneven thickness or surface defects caused by misalignment, and improving the consistency of product molding quality.

[0030] By optimizing the assembly efficiency and ease of use of the mold, the shortcomings of complex disassembly and cumbersome adjustment in the existing technology are overcome. The modular limit component 21 and the standardized matching structure make the mold opening and closing smoother, reduce manual adjustment time, and reduce component wear caused by repeated disassembly and assembly, thus extending the service life of the mold.

[0031] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A tubular carbon fiber beam forming mold, comprising a base (1), characterized in that: The base (1) is provided with an upper beam female mold (11), and a rib plate (12) is provided between the upper beam female mold (11) and the base (1). The upper beam female mold (11) is provided with a connecting plate (2), and a side plate (3) is provided on the connecting plate (2). A cover plate (4) is provided on the side plate (3). A limit component (21) is provided between the side plate (3) and the connecting plate (2). The side plate (3) and the cover plate (4) are correspondingly provided. A lifting ring (41) is threadedly connected to the cover plate (4). The lower end of the base (1) is hollowed out. Lifting lugs (13) are provided on both sides of the base (1).

2. The tubular carbon fiber beam forming mold according to claim 1, characterized in that: The number of ribs (12) is multiple, and the multiple ribs (12) are evenly distributed.

3. The tubular carbon fiber beam forming mold according to claim 1, characterized in that: The upper beam female mold (11), side plate (3) and cover plate (4) have the same length. The side plate (3) is composed of multiple structures. The side plate (3) has an opening and closing cavity. The outer side of the side plate (3) is screwed with a baffle (31). The baffle (31) is set correspondingly to the side plate (3).

4. The tubular carbon fiber beam forming mold according to claim 1, characterized in that: The limiting component (21) includes a limiting pin (22), the connecting plate (2) has a limiting hole (23), one end of the limiting pin (22) is inserted into the limiting hole (23), and the other end of the limiting pin (22) is inserted into the side plate (3). The number of limiting components (21) is multiple.

5. The tubular carbon fiber beam forming mold according to claim 1, characterized in that: The side plate (3) is provided with a protrusion (32), and the cover plate (4) is provided with a groove (42). The protrusion (32) and the groove (42) are provided in correspondence and fit together.

6. The tubular carbon fiber beam forming mold according to claim 1, characterized in that: The upper beam female mold (11), side plate (3) and cover plate (4) are fastened together to form a mold cavity, and the upper beam female mold (11), side plate (3) and cover plate (4) are all connected by bolts.

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