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Method for manufacturing bicycle frame by using reinforced nylon material

A bicycle frame and nylon technology is applied in the field of manufacturing bicycle frames with reinforced nylon materials, which can solve the problems of low elastic modulus and rigidity of aluminum, large difference in quality, high price, etc., and achieve the effects of low cost, simple operation and light weight.

Active Publication Date: 2014-04-02
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Disadvantages of aluminum alloy frame: Since aluminum is a material with low elasticity and rigidity, thick pipes are used, or the shape is changed such as cross-over pipe, padded pipe, etc. In addition, aluminum alloy frame must be heat treated, otherwise the strength is not enough , while generally small-scale factories cannot afford to purchase heat treatment equipment
However, the quality of each manufacturer varies greatly, and some are very hard, so this kind of frame can only be known whether it is good or not after riding.
The disadvantage is: expensive, compared with titanium alloy, the price of carbon fiber frame is even worse, the price of the top carbon fiber frame is tens of thousands

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for manufacturing a bicycle frame with reinforced nylon material, the method includes the following steps:

[0033] (1) Weaving glass fibers into fiber mats, laying them flat in a mold, and preheating the mold to 170°C;

[0034] (2) 1kg caprolactam monomer and 2g potassium hydroxide are placed in the reaction kettle, the temperature of the kettle is raised to 140° C., and then vacuum dehydration is carried out for 30 minutes, so that the water content of the system is less than 300 ppm, and 4 g of benzoyl chloride is added as a cocatalyst. Then quickly inject the mixed material into the mold;

[0035] (3) Put the mold in an oven at 180° C., and carry out polymerization reaction for 0.5 h to obtain a reinforced nylon sheet, and then cut the sheet into the shape of a bicycle frame.

Embodiment 2

[0037] A method for manufacturing a bicycle frame with reinforced nylon material, characterized in that the method comprises the following steps:

[0038] (1) Weaving the aramid fiber into a fiber cloth, laying it flat in the mold, and preheating the mold to 160°C;

[0039] (2) The mixture of 1kg enantholactam monomer and nylon-66, whose weight ratio is 3:1, and 6g sodium ethoxide are placed in the reaction kettle, the temperature of the kettle is raised to 120°C, and then vacuum dehydration is carried out for 40min, so that The water content of the system is less than 300ppm, add 4g of methyl diisocyanate (TDI) as a co-catalyst, and then quickly inject the mixed material into the mold;

[0040](3) Put the mold in an oven at 160° C., and carry out polymerization reaction for 2 hours to obtain a reinforced nylon sheet, which can then be cut into the shape of a bicycle frame.

Embodiment 3

[0042] A method for manufacturing a bicycle frame with reinforced nylon material, characterized in that the method comprises the following steps:

[0043] (1) Weaving stainless steel fibers into fiber mats, laying them flat in the mold, and preheating the mold to 180°C;

[0044] (2) Put a mixture of 1kg caprolactam monomer, nylon 6 and montmorillonite in a weight ratio of 2:2:1, and 4g sodium caprolactam in a reaction kettle, raise the temperature of the kettle to 150°C, and then carry out vacuum dehydration 20min, make the water content of the system less than 300ppm, add 1g of methyl diisocyanate (TDI) as a cocatalyst, and then quickly inject the mixed material into the mold;

[0045] (3) Put the mold in an oven at 180° C., and carry out polymerization reaction for 4 hours to obtain a reinforced cast nylon sheet, and then cut the sheet into the shape of a bicycle frame.

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PUM

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Abstract

The invention relates to a method for manufacturing a bicycle frame by using a reinforced nylon material. The method comprises the following steps of: weaving fibers into a fiber felt or a piece of fiber cloth, spreading the fiber felt or the fiber cloth in a die, and preheating the die; mixing a nylon prepolymer and an alkali catalyst, putting the mixture into a reaction kettle, heating the kettle to the temperature of between 100 and 200 DEG C, performing vacuum dehydration, adding cocatalyst, and quickly injecting the mixed materials into the die; and placing the die into an oven of 120 to 200 DEG C, performing polymerization reaction to obtain a reinforced nylon board, and cutting the board into a bicycle frame shape. Compared with the prior art, the method has simple operation and low cost; the obtained reinforced nylon material can be directly cut and molded without welding; and the molded board has high strength, light weight, good impact resistance and low cost.

Description

technical field [0001] The invention relates to a method for manufacturing a bicycle frame, in particular to a method for manufacturing a bicycle frame with reinforced nylon material. Background technique [0002] Bicycle is a kind of commonly used means of transportation, how to produce safe, light, environment-friendly, cheap bicycle frame is an important issue that determines the development of this industry all the time. The materials used to make bicycle frames mainly include the following: [0003] Aluminum alloy (Al-Mg-Si, Al-Zn-Mg-(Cu)) [0004] Frames made of aluminum alloy have been around for a long time. Its lightness and low price are its advantages, but the reaction of old riders to it is that it is light but bendable. Although it has been improved many times, it still cannot overcome the shortcoming of low Young's modulus. The latest aluminum alloy frame, in order to improve Young's modulus of elasticity, increase the outer diameter of the pipe, use flat t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/36
Inventor 杨桂生
Owner HEFEI GENIUS NEW MATERIALS