Carbon fiber bicycle front fork rough blank processing and forming die
By designing a mold structure with oppositely spiraling external thread shafts and elastic components, the problems of difficult demolding and uneven mold closing pressure in traditional molds were solved, enabling rapid, safe demolding and high-quality molding of carbon fiber forks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU FEIYU SPORTS EQUIP CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional carbon fiber fork molding dies are difficult to demold, which can easily lead to fiber layer peeling or surface scratches. Furthermore, the mold closing pressure relies on a rigid structure, which is difficult to adapt to fluctuations in the prepreg thickness, resulting in uneven density of the finished product.
A rotating shaft connecting slide plate with opposite external threads was designed. Combined with an elastic element, the slide plate can move synchronously or in opposite directions. With the help of the pull handle and rotating handle, the demolding process is simplified, and the elastic force of the elastic element can achieve uniform pressure and improve the molding quality.
This enables rapid and safe demolding of carbon fiber forks, reduces product damage, and improves the quality and consistency of finished products.
Smart Images
Figure CN224296644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of carbon fiber composite material molding technology, and in particular to a molding die for processing carbon fiber bicycle fork blanks. Background Technology
[0002] Carbon fiber composites are widely used in high-end bicycle manufacturing, especially in key load-bearing components such as front forks, due to their advantages of being lightweight, high-strength, and fatigue-resistant. During the molding process of carbon fiber front fork blanks, the mold structure directly impacts product quality and production efficiency.
[0003] In the traditional molding process of carbon fiber fork blanks, the molds mostly adopt an integral structure, which requires manual knocking or prying during demolding, which can easily lead to fiber layer peeling or surface scratches. In addition, the mold closing pressure depends on the rigid structure, which is difficult to adapt to the fluctuation of the prepreg thickness, and the finished product is prone to uneven density. Utility Model Content
[0004] In order to overcome the shortcomings of traditional fork molding processes, which typically use integral molds, making demolding difficult and relying on rigid structures for mold closing pressure, the purpose of this utility model is to provide a molding die for processing carbon fiber bicycle fork blanks.
[0005] The technical implementation scheme of this utility model is as follows: a molding die for processing carbon fiber bicycle front fork blanks includes a lower die, an upper die, a mounting frame, elastic elements, a rotating shaft, and a sliding plate. The top of the lower die has a placement groove in the middle, and the top of the lower die has symmetrical sliding grooves on the left and right sides, which are connected to the placement groove. Each sliding groove has a square groove in the middle. The lower die is rotatably connected to a rotating shaft, and sliding plates are symmetrically threaded on the left and right sides of the rotating shaft. The lower sides of the two sliding plates slide in the square grooves on both sides. The bottom surface of the upper die has a mounting groove, and a mounting frame is slidably connected in the mounting groove. Five elastic elements are spaced apart in the mounting groove. One end of the elastic element is connected to the inner wall of the mounting groove, and the other end of the elastic element is connected to the top of the mounting frame.
[0006] In a preferred embodiment of the present invention, a grip bar and a pull handle are also included. The grip bar is connected to the front right side of the lower mold and the rear left side of the upper mold, and the pull handle is connected to the front end of the upper mold.
[0007] In a preferred embodiment of this utility model, the ends of the two sliding plates that are close to each other are both arc-shaped slopes. When the end faces of the two sliding plates are aligned with the end faces of the left and right sides of the lower mold, the arc-shaped slopes fill in the missing parts on the left and right sides of the placement groove.
[0008] In a preferred embodiment of the present invention, a positioning plate is also included. The positioning plate is connected to the middle of the top of the lower mold, and a positioning hole is opened on the bottom surface of the upper mold. The positioning plate can be inserted into the positioning hole.
[0009] In a preferred embodiment of the present invention, a rotating handle is also included, with the right end of the rotating shaft connected to the rotating handle.
[0010] In a preferred embodiment of this utility model, the external threads on the left and right sides of the rotating shaft have opposite directions, and the elastic elements are all springs.
[0011] Compared with the prior art, this utility model has the following advantages: 1. This utility model uses a rotating shaft with opposite external threads to connect two sliding plates, so that rotating the rotating handle can control the synchronous movement of the sliding plates in opposite directions. This design not only facilitates the laying of carbon fiber prepreg, but also enables quick and safe demolding after molding, reducing the risk of product damage.
[0012] 2. This utility model has an elastic element made of spring inside the upper mold, which uses its elastic force to apply uniform pressure to the upper surface of the fork blank, which helps to improve the quality and consistency of the finished product. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0014] Figure 2 This is an exploded view of the present invention.
[0015] Figure 3 This is a three-dimensional structural diagram of the mounting bracket and other components of this utility model.
[0016] Figure 4 This is a three-dimensional structural diagram of the pull handle and other components of this utility model.
[0017] The components in the attached diagram are labeled as follows: 1. Lower mold, 11. Slide groove, 12. Placement groove, 13. Square groove, 15. Positioning plate, 2. Upper mold, 21. Pull handle, 22. Grip bar, 23. Mounting groove, 231. Mounting bracket, 24. Elastic element, 25. Positioning hole, 3. Rotating shaft, 31. Slide plate, 311. Curved inclined surface, 32. External thread, 33. Rotating handle. Detailed Implementation
[0018] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.
[0019] A molding die for machining carbon fiber bicycle fork blanks, such as Figures 1-4As shown, the assembly includes a lower mold 1, an upper mold 2, a mounting bracket 231, an elastic element 24, a rotating shaft 3, and a sliding plate 31. The lower mold 1 has a placement groove 12 in the center of its top. The top of the lower mold 1 is symmetrically provided with sliding grooves 11, which communicate with the placement groove 12. Each sliding groove 11 has a square groove 13 in the center. The lower mold 1 is internally connected to the rotating shaft 3. Sliding plates 31 are symmetrically threaded on both sides of the rotating shaft 3. The external threads 32 on the left and right sides of the rotating shaft 3 rotate in opposite directions. The rotating shaft 3 is used to drive the sliding plates 31 to move. Rotating the rotating shaft 3 allows the two sliding plates 31 to move synchronously towards or in opposite directions. The lower sides of the two sliding plates 31 slide within the square grooves 13 on both sides. The square grooves 13 guide the sliding plates 31, ensuring that the sliding plates 31 can only move left and right. Both ends of the two slide plates 31 are curved inclined surfaces 311. When the end faces of the two slide plates 31 are aligned with the end faces of the left and right sides of the lower mold 1, the curved inclined surfaces 311 fill in the missing parts on the left and right sides of the placement groove 12. The bottom end face of the upper mold 2 has an installation groove 23. The installation frame 231 is slidably connected in the installation groove 23. Five elastic elements 24 are spaced apart in the installation groove 23. One end of the elastic element 24 is connected to the inner wall of the installation groove 23, and the other end of the elastic element 24 is connected to the top of the installation frame 231. The elastic elements 24 are all springs. The five springs evenly distributed can ensure the balance of pressure. The installation frame 231 slides in the installation groove 23 and is in contact with the upper surface of the carbon fiber prepreg through its lower curved surface. Through the elastic force of the elastic elements 24, the installation frame 231 applies pressure evenly to the upper surface of the carbon fiber prepreg.
[0020] like Figures 1-4 As shown, it also includes a grip bar 22, a pull handle 21, a positioning plate 15, and a rotating handle 33. The front right side of the lower mold 1 and the rear left side of the upper mold 2 are both connected to the grip bar 22. The front end of the upper mold 2 is connected to the pull handle 21. The pull handle 21 and the grip bar 22 are used to assist the operator in opening and closing the mold, improving the convenience of mold opening and closing. The top middle of the lower mold 1 is connected to the positioning plate 15. The bottom surface of the upper mold 2 has a positioning hole 25. The positioning plate 15 can be inserted into the positioning hole 25, which can achieve precise positioning between the upper mold 2 and the lower mold 1 and prevent misalignment between the upper mold 2 and the lower mold 1. The right end of the rotating shaft 3 is connected to the rotating handle 33. The rotating handle 33 is used to manually drive the rotating shaft 3 to rotate, which facilitates control of the movement direction and position of the slide plate 31.
[0021] When using this device, two operators hold the front handle 21 and the rear lever 22 respectively to remove the upper mold 2 from the lower mold 1. They then rotate the rotating handle 33, which drives the rotating shaft 3 to rotate. Since the rotating shaft 3 has oppositely oriented external threads 32 on both sides, the two sliding plates 31 connected to them move synchronously in opposite directions within the groove 11. The sliding plates 31 move away from the placement groove 12, facilitating the placement of carbon fiber prepreg in the lower mold 1's placement groove 12. The carbon fiber prepreg in the placement groove 12 is then arranged to adhere to the inner wall of the placement groove 12. The rotating handle 33 is then rotated in the opposite direction, causing the rotating shaft 3 to rotate in the opposite direction. At this point, the two sliding plates 31 move synchronously towards each other within the groove 11, returning to their initial positions. As the sliding plates 31 move towards the center, the end with the curved inclined surface 311 gradually fills in the missing parts on both sides of the placement groove 12. The upper mold 2 is then placed on the lower mold 1 to securely support the carbon fiber prepreg in the placement groove 12. During this process, the positioning hole 25 is aligned with the positioning plate 15, and the positioning plate 15 is inserted into the positioning hole 25. When the arc-shaped surface of the mounting bracket 231 contacts the carbon fiber prepreg, the carbon fiber prepreg presses against the mounting bracket 231, causing the mounting bracket 231 to move upward along the mounting groove 23. During this process, the elastic element 24 changes from its initial state to a compressed state. When the upper mold 2 completely covers the lower mold 1, the arc-shaped surface of the lower side of the mounting bracket 231 is pressed against the upper surface of the carbon fiber prepreg under the action of the spring force. Then, the worker can transfer the device containing the carbon fiber prepreg to the next process. When demolding, the upper mold 2 is removed from the lower mold 1, and the rotating handle 33 is rotated. The two sliding plates 31 move away from each other synchronously in the sliding groove 11. Then, the formed bicycle fork can be quickly removed from the lower mold 1.
[0022] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of this invention. Therefore, the scope of this invention should be limited only by the appended claims.
Claims
1. A molding die for processing carbon fiber bicycle fork blanks, comprising a lower die (1), characterized in that, It also includes an upper mold (2), a mounting bracket (231), elastic elements (24), a rotating shaft (3), and a sliding plate (31). The top of the lower mold (1) has a placement groove (12) in the middle. The top of the lower mold (1) is symmetrically provided with sliding grooves (11) on the left and right sides. The sliding grooves (11) are connected to the placement grooves (12). The middle of each sliding groove (11) has a square groove (13). The lower mold (1) is rotatably connected to the rotating shaft (3). The left and right sides of the rotating shaft (3) are symmetrically provided with threaded sliding plates (31). The lower sides of the two sliding plates (31) slide in the square grooves (13) on both sides respectively. The bottom surface of the upper mold (2) has a mounting groove (23). The mounting bracket (231) is slidably connected in the mounting groove (23). Five elastic elements (24) are spaced apart in the mounting groove (23). One end of the elastic element (24) is connected to the inner wall of the mounting groove (23), and the other end of the elastic element (24) is connected to the top of the mounting bracket (231).
2. A molding die for processing carbon fiber bicycle fork blanks according to claim 1, characterized in that, It also includes a grip (22) and a pull handle (21). The grip (22) is connected to the front right side of the lower mold (1) and the rear left side of the upper mold (2). The pull handle (21) is connected to the front end of the upper mold (2).
3. A molding die for processing carbon fiber bicycle fork blanks according to claim 2, characterized in that, Both slide plates (31) have an arc-shaped inclined surface (311) at one end that is close to each other. When the end faces of the two slide plates (31) are aligned with the end faces of the left and right sides of the lower mold (1), the arc-shaped inclined surface (311) fills in the missing parts on the left and right sides of the placement groove (12).
4. A molding die for processing carbon fiber bicycle fork blanks according to claim 3, characterized in that, It also includes a positioning plate (15), with the positioning plate (15) connected to the top center of the lower mold (1), and a positioning hole (25) opened on the bottom surface of the upper mold (2), and the positioning plate (15) can be inserted into the positioning hole (25).
5. A molding die for processing carbon fiber bicycle fork blanks according to claim 4, characterized in that, It also includes a rotating handle (33), and the right end of the rotating shaft (3) is connected to the rotating handle (33).
6. A molding die for processing carbon fiber bicycle fork blanks according to claim 5, characterized in that, The external threads (32) on the left and right sides of the rotating shaft (3) rotate in opposite directions, and the elastic elements (24) are all springs.