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Punching-free carbon fiber bicycle rim forming die and process

A technology of forming molds and carbon fibers, which is applied to household appliances, other household appliances, household components, etc., can solve the problems of increasing the process steps of punching, increasing the production cost of the enterprise, and damaging the strength of the rim, so as to shorten the process time, The effect of streamlining production process and stable performance

Pending Publication Date: 2022-07-29
XIAMEN HONGJI WEIYE INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the carbon fiber bicycle rim is usually machined and drilled for the spoke holes after the rim is formed. In this processing method, the carbon filaments are broken, resulting in damage to the strength of the entire rim, which in turn causes the entire wheel hub to be damaged. The strength and stability are reduced, and at the same time, the process steps of drilling holes are added to the formed rim, which increases the production cost of the enterprise

Method used

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  • Punching-free carbon fiber bicycle rim forming die and process
  • Punching-free carbon fiber bicycle rim forming die and process
  • Punching-free carbon fiber bicycle rim forming die and process

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Cooperate Figure 1 to Figure 6 As shown in the figure, the present invention discloses a punch-free carbon fiber bicycle rim forming mold, which includes an upper mold 1, a lower mold 2, a rim preform 3 and a spoke hole insert 4. Above, the top side of the lower mold 2 is provided with a forming groove 21 for accommodating the rim preform 3, the inner side of the rim preform 3 is uniformly provided with a plurality of spoke preform holes 31 along the circumferential direction, and the spoke hole inserts 4 are movably arranged The top side of the lower mold 2 is used for insertion into the spoke preform holes 31 . The bottom side structure of the upper mold 1 is matched with the top side structure of the lower mold 2, and a rim molding cavity is formed in cooperation with the rim preform 3 for curing and molding.

[0039] The top side of the lower mold 2 is provided with a forming outer ring 22 and a forming inner ring 23 , and the forming outer ring 22 and the forming...

Embodiment 2

[0046] Cooperate Figure 7 As shown, the present invention also discloses a punch-free carbon fiber bicycle rim forming process, comprising the following steps:

[0047] S1. The inner ring and the outer ring of the preformed rim preform, wherein the inner side of the inner ring is provided with a number of spoke preformed holes along the circumferential direction;

[0048] S2. Combine the inner ring and the outer ring, and set a nylon air duct in the blowing cavity formed between the inner ring and the outer ring to form a rim preform structure;

[0049] S3, using carbon fiber composite material to wrap yarn on the surface layer of the rim preform structure to form a winding layer, thereby making a rim preform, wherein when the winding layer is wound to the outer side of the spoke preform hole, a side hole is formed;

[0050] S4. Place the rim preform in the forming groove of the lower die, press down to form the outer ring, and insert the spoke hole insert into the spoke pre...

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PUM

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Abstract

The invention discloses a punching-free carbon fiber bicycle rim forming die and process, the die comprises an upper die, a lower die, a rim preform and a spoke hole plug-in, the upper die is arranged right above the lower die in a liftable manner, the top side of the lower die is provided with a forming groove for accommodating the rim preform, and the spoke hole plug-in is arranged in the forming groove. A plurality of spoke preformed holes are evenly formed in the inner side of the rim preformed piece in the circumferential direction, and the spoke hole inserting pieces are movably arranged on the top side of the lower die and used for being inserted into the spoke preformed holes. According to the punching-free carbon fiber bicycle rim forming die and technology, spoke preformed holes are preformed in the stage of a rim preformed piece, spoke hole inserting pieces are additionally arranged in the rim forming die, and when the rim preformed piece is placed into the forming die, the spoke hole inserting pieces are inserted into the spoke preformed holes; according to the technology, the spoke holes and the rim are integrally formed, the strength of the spoke holes is high, and the manufactured carbon fiber rim is high in strength and stable in performance.

Description

technical field [0001] The invention relates to the technical field of bicycle rims, in particular to a punch-free carbon fiber bicycle rim forming die and a process. Background technique [0002] At present, the industry proposes to use carbon fiber material to make wheel hubs. Carbon fiber is "soft on the outside and rigid on the inside". Its weight is lighter than that of metal aluminum, but its strength is higher than that of steel. Under the same power, the braking performance of carbon fiber wheels is more sensitive than that of aluminum alloy wheels. , the shock absorption effect is better, and the physical energy consumption is lower. When the rim is in use, it usually needs to be connected to the hub through the spokes, so as to be assembled to the rotating shaft of the bicycle for transmission connection, which requires the rim to be provided with spoke mounting holes for installing the spokes. [0003] In the prior art, carbon fiber bicycle rims are usually machi...

Claims

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Application Information

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IPC IPC(8): B29C70/42B29C33/00B29L31/30
CPCB29C70/42B29C33/00B29L2031/3091
Inventor 王景山
Owner XIAMEN HONGJI WEIYE INDAL