Forming die of carbon fiber spoke disc

Abstract

The utility model relates to a forming die of a carbon fiber spoke disc. The forming die comprises an upper die, a lower die, a wedge block, a forming column, a flexible pressing block and an air bag. The upper die is arranged over the lower die, the flexible pressing block is arranged between the upper die and the lower die, the wedge block is arranged between the flexible pressing block and the lower die, an inserting groove is formed in the middle of the upper surface of the lower die, the forming column is matched with the inserting groove, a first forming face is formed in the top of the lower die, and a second forming face is formed in the bottom of the flexible pressing block. A mounting groove is formed in the bottom of the upper die, and the air bag is mounted in the mounting groove and communicated with an external air source. The flexible pressing block is used for covering the carbon fiber spoke disc rough blank, the flexible pressing block can be completely attached to the carbon fiber spoke disc rough blank under the action of pressure, the pressure from the air bag is evenly dispersed on the carbon fiber spoke disc rough blank, and therefore the wall thickness of the carbon fiber spoke disc becomes thinner and more even. And the purpose of lightening the carbon fiber spoke disc is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber bicycle production and manufacturing, in particular to a forming die for a carbon fiber spoke plate. Background Art

[0002] Spokes are important components on bicycle wheels, providing necessary support for bicycle rims. One end of a spoke is fixedly connected to the rim of a bicycle, and the other end is connected to a spoke plate.

[0003] With the development of technology, carbon fiber bicycles are becoming more and more popular among people. A carbon fiber spoke plate is one of the parts used to fix spokes on a carbon fiber wheel. Although a metal spoke plate has high strength, its weight is relatively high. A carbon fiber bicycle is a product that pursues lightweight, and obviously a metal spoke plate is not the best choice for a carbon fiber bicycle. Compared with a metal spoke plate, a carbon fiber spoke plate has a lighter mass under the condition that its strength is hardly reduced. Therefore, there is an urgent need for a die that can produce lightweight carbon fiber spoke plates. Summary of the Invention

[0004] The purpose of the utility model is to provide a forming die for a carbon fiber spoke plate to solve the above problems.

[0005] To achieve the above purpose, the utility model discloses a forming die for a carbon fiber spoke plate, which comprises: an upper die, a lower die, a wedge block, a forming column, a flexible pressing block and an air bag; the upper die is arranged directly above the lower die, the flexible pressing block is arranged between the upper die and the lower die, the wedge block is arranged between the flexible pressing block and the lower die, a plugging groove is formed in the middle of the upper surface of the lower die, the forming column is matched with the plugging groove, a first forming surface is formed on the top of the lower die, and a second forming surface is formed on the bottom of the flexible pressing block; an installation groove is formed in the bottom of the upper die, the air bag is installed in the installation groove, and the air bag is communicated with an external air source.

[0006] Preferably, an air nozzle is arranged on the air bag, the air nozzle is communicated to the outside, an installation hole for installing the air nozzle is formed on one side of the upper die, and the air nozzle passes through the installation hole.

[0007] Preferably, a boss is fixedly connected to the top of the lower die, the first forming surface is arranged on the boss, and a plurality of the wedge blocks are arranged around the boss; the wedge block comprises a base body and a plugging part, the plugging part is fixedly connected to one side of the top of the base body, and after the base body is attached to the side surface of the boss, the plugging part is located above the first forming surface.

[0008] Preferably, a sliding groove is formed in the bottom of the wedge block, a sliding rail is arranged on the top of the lower die, the straight line where the sliding rail is located passes through the center of the boss, and the sliding rail is slidably connected with the sliding groove.

[0009] Preferably, the cross-sectional shape of the forming column is a regular polygon.

[0010] Preferably, the cross-sectional shape of the forming column is a regular hexagon, and fillets are provided at the corners of the forming column.

[0011] Preferably, the flexible pressing block is made of rubber or silica gel.

[0012] Preferably, a notch is provided at the top edge of the lower mold.

[0013] The utility model has the following beneficial effects:

[0014] In the utility model, a flexible pressing block is used to cover the rough blank of the carbon fiber spoke disc. Under the action of pressure, the flexible pressing block can be completely attached to the rough blank of the carbon fiber spoke disc, so that the pressure from the air bag is evenly dispersed on the rough blank of the carbon fiber spoke disc, thereby making the wall thickness of the carbon fiber spoke disc thinner and more uniform, achieving the purpose of lightweight carbon fiber spoke disc. Description of the Drawings

[0015] Figure 1 is an overall exploded schematic diagram provided in a specific embodiment of the utility model;

[0016] Figure 2 is an overall structural schematic diagram provided in a specific embodiment of the utility model;

[0017] Figure 3 is a cross-sectional schematic diagram provided in a specific embodiment of the utility model.

[0018] Description of the main component symbols:

[0019] 100, lower mold; 110, boss; 111, first forming surface; 112, insertion slot; 120, slide rail; 200, wedge block; 210, base body; 220, insertion part; 230, chute; 300, forming column; 400, flexible pressing block; 500, air bag; 510, air nozzle; 600, upper mold; 610, through hole; 620, installation groove; 700, carbon fiber flange. Specific Embodiments

[0020] In order to make the purpose, technical solutions and advantages of the utility model clearer, the following further describes the utility model in detail with reference to the drawings and embodiments.

[0021] As Figures 1 to 3As shown in the figure, the present utility model provides a forming die for a carbon fiber spoke disc, including: an upper die 600, a lower die 100, a wedge block 200, a forming column 300, a flexible pressing block 400 and an air bag 500; the upper die 600 is arranged directly above the lower die 100, the flexible pressing block 400 is arranged between the upper die 600 and the lower die 100, the wedge block 200 is arranged between the flexible pressing block and the lower die 100, a plug-in slot 112 is opened in the middle of the upper surface of the lower die 100, the forming column 300 is matched with the plug-in slot 112, a first forming surface 111 is opened at the top of the lower die 100, and a second forming surface is opened at the bottom of the flexible pressing block 400; an installation groove 620 is opened at the bottom of the upper die 600, the air bag 500 is installed in the installation groove 620, and the air bag 500 is communicated with an external air source.

[0022] In this embodiment, first, the general shape of the carbon fiber spoke disc 700 is preformed on the fixture. The wedge block 200 is inserted into the side of the preformed carbon fiber spoke disc 700. Then, the preformed carbon fiber spoke disc 700 and the wedge block 200 are placed into the lower die 100 together. The forming column 300 is passed through the carbon fiber spoke disc 700 and inserted into the plug-in slot 112. Then, the flexible pressing block 400 is placed on the preformed carbon fiber spoke disc 700. Finally, the upper die 600 is covered on the flexible pressing block 400.

[0023] In this embodiment, the flexible pressing block 400 is used to cover the carbon fiber spoke disc 700. Under the action of pressure, the flexible pressing block 400 can be completely attached to the carbon fiber spoke disc 700, so that the pressure from the air bag 500 is evenly dispersed on the carbon fiber spoke disc 700, thereby making the wall thickness of the carbon fiber spoke disc 700 thinner and more uniform, achieving the purpose of a lightweight carbon fiber spoke disc.

[0024] An air nozzle 510 is arranged on the air bag 500, and the air nozzle 510 is communicated to the outside. A through hole 610 for installing the air nozzle 510 is opened on one side of the upper die 600, and the air nozzle 510 passes through the through hole 610.

[0025] In this embodiment, during the use process, the upper die 600 and the lower die 100 are locked by bolts. The high-pressure air source enters the air bag 500 through the air nozzle 510 to inflate and maintain pressure for the air bag 500. After the air bag 500 is inflated, a pressure of 8-10 kg is provided for the flexible pressing block.

[0026] In this embodiment, the flexible pressing block is made of silica gel. The first forming surface 111 coincides with the lower surface of the carbon fiber spoke disc 700, and the second forming surface coincides with the upper surface of the carbon fiber spoke disc 700. In other embodiments, the flexible pressing block is made of rubber.

[0027] A boss 110 is fixedly connected to the top of the lower mold 100. A first forming surface 111 is arranged on the boss 110. A number of wedge blocks 200 are arranged around the boss 110. The wedge block 200 includes a base body 210 and a plug-in portion 220. The plug-in portion 220 is fixedly connected to one side of the top of the base body 210. After the base body 210 is attached to the side surface of the boss 110, the plug-in portion 220 is located above the first forming surface 111.

[0028] In this embodiment, a sliding groove 230 is formed at the bottom of the wedge block 200, and a sliding rail 120 is arranged on the top of the lower mold 100. The straight line where the sliding rail 120 is located passes through the center of the boss 110. The sliding rail 120 is slidably connected with the sliding groove 230. During use, the wedge blocks 200 are arranged in the side grooves of the preformed carbon fiber spoke disc 700 in a specific order to assist in the forming of the side grooves of the carbon fiber spoke disc 700. The sliding rail 120 and the sliding groove 230 cooperate with each other to assist in fixing the wedge block 200, prevent the wedge block 200 from shaking and rotating, and at the same time facilitate the precise guiding of the wedge block 200 into or out of the side groove of the carbon fiber spoke disc 700.

[0029] The cross-sectional shape of the forming column 300 is a regular polygon. In this embodiment, the cross-sectional shape of the forming column 300 is a regular hexagon, and rounded corners are arranged at the corners of the forming column 300. The forming column 300 is used to form the mounting hole in the middle of the carbon fiber spoke disc 700. The mounting hole is connected to the rotating shaft. By forming the mounting hole into a hexagon through the forming column 300, relative rotation between the carbon fiber spoke disc 700 and the rotating shaft can be avoided.

[0030] A notch is formed at the top edge of the lower mold 100. In this embodiment, the setting of the notch facilitates the separation of the upper mold 600 and the lower mold 100.

[0031] The usage process is as follows:

[0032] First, a rough blank of a carbon fiber spoke disc 700 is preformed in a fixture. The wedge blocks 200 are installed in the side grooves of the rough blank of the carbon fiber spoke disc 700 and placed into the lower mold 100 so that the rough blank of the carbon fiber spoke disc 700 is attached to the first forming surface 111. The forming column 300 is passed through the carbon fiber spoke disc 700 and inserted into the plug-in slot 112. A flexible pressing block 400 is placed above the rough blank of the carbon fiber spoke disc 700 so that the second forming surface is attached to the rough blank of the carbon fiber spoke disc 700. An air bag 500 is installed at the bottom of the upper mold 600, and the upper mold 600 together with the air bag 500 is installed on the flexible pressing block 400. The upper mold 600 and the lower mold 100 are locked by bolts and nuts. The mold is placed on a forming furnace table, heated at a high temperature of 150 °C, and at the same time, the air bag 500 is inflated to press the flexible pressing block 400. After baking for 4 hours, the product is obtained.

[0033] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A molding die for a carbon fiber spoke disc, characterized in that: include: An upper mold (600), a lower mold (100), a wedge block (200), a molding column (300), a flexible pressing block (400) and an air bag (500); the upper mold (600) is arranged directly above the lower mold (100), the flexible pressing block (400) is arranged between the upper mold (600) and the lower mold (100), the wedge block (200) is arranged between the flexible pressing block and the lower mold (100), and the upper surface of the lower mold (100) A plug-in slot (112) is provided in the middle, the molding column (300) cooperates with the plug-in slot (112), a first molding surface (111) is provided at the top of the lower mold (100), and a second molding surface is provided at the bottom of the flexible pressure block (400); a mounting slot (620) is provided at the bottom of the upper mold (600), the air bag (500) is installed in the mounting slot (620), and the air bag (500) is connected to an external air source.

2. The forming mold of a carbon fiber spoke disc according to claim 1, characterized in that: The air bag (500) is provided with an air nozzle (510), and the air nozzle (510) is connected to the outside. A through hole (610) for installing the air nozzle (510) is opened on one side of the upper mold (600), and the air nozzle (510) passes through the through hole (610).

3. The molding die for a carbon fiber spoke disc according to claim 2, characterized in that: The top of the lower mold (100) is fixedly connected to a boss (110), the first molding surface (111) is arranged on the boss (110), and a plurality of wedge blocks (200) are arranged around the boss (110); the wedge block (200) comprises a base (210) and an inserting portion (220), the inserting portion (220) is fixedly connected to one side of the top of the base (210), and after the base (210) is fitted with the side surface of the boss (110), the inserting portion (220) is located above the first molding surface (111).

4. The molding die for a carbon fiber spoke disc according to claim 3, characterized in that: A slide groove (230) is provided at the bottom of the wedge block (200), and a slide rail (120) is provided at the top of the lower mold (100). The straight line where the slide rail (120) is located passes through the center of the boss (110), and the slide rail (120) is slidably connected to the slide groove (230).

5. The molding die for a carbon fiber spoke disc according to claim 1, characterized in that: The cross-sectional shape of the forming column (300) is a regular polygon.

6. The molding die for a carbon fiber spoke disc according to claim 5, characterized in that: The cross-sectional shape of the molding column (300) is a regular hexagon, and the corners of the molding column (300) are provided with rounded corners.

7. The molding die for a carbon fiber spoke disc according to claim 1, characterized in that: The flexible pressing block (400) is made of rubber or silicone.

8. The molding die for a carbon fiber spoke disc according to claim 1, characterized in that: A notch is provided at the top edge of the lower mold (100).

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