Multi-tg carbon fiber rim and preparation method thereof

Abstract

The invention discloses a multi-TG (glass transition temperature) carbon fiber wheel rim as well as a manufacturing method thereof. The wheel rim is manufactured from carbon fiber composite materials, and comprises two crossed side walls and a connecting axle; a tire position hole slot for placing an inner tire and a 'V'-shaped inner cavity body are formed in two border areas of the connecting axle in a spacing manner, and the tire position hole slot and the 'V'-shaped inner cavity body are ranked up and down; side walls, corresponding to and close to the tire position hole slot and the connecting axle, are braking sides; the braking sides and the connecting axle combine to form a structure with an 'H'-shaped cross section; two kinds or more than two kinds of epoxy resin carbon fiber materials with different TGs are adopted for the 'H'-shaped structure and the side wall corresponding to the inner cavity body. According to the multi-TG carbon fiber wheel rim disclosed by the invention, epoxy resin carbon fiber materials with high-TG higher than 180 DEG C are adopted for the braking area for bearing tire pressure, and the frame burning hazard of the rim is reduced effectively; not only is the safety of the rim improved, but also the requirements at two aspects of light weight and safety are considered; at the non-braking part, epoxy resin carbon fiber materials with low-TG lower than 180 DEG C are adopted, and thus the rim has favorable rigidity and toughness, and the impact strength of the rim is improved.

Description

technical field [0001] The invention relates to the application field of bicycle accessories, in particular to a multi-TG carbon fiber rim and a preparation method thereof. Background technique [0002] Cycling is an aerobic outdoor exercise that is very beneficial to the human body, and it has been widely carried out in developed countries such as Europe and the United States. According to statistics, in the United States, about one-third of outdoor sports are cycling. This shows the universality of this movement. Bicycles have also changed from traditional means of transportation in our impression to fitness equipment. Various manufacturers are all striving to improve product design, manufacturing process, and use better materials in order to obtain better bicycles. [0003] The material used to make bicycles has gradually changed from steel to aluminum alloy in order to pursue light weight. In recent years, expensive carbon fiber materials have been used on a large sc...

AI Technical Summary

Problems solved by technology

First of all, the molding conditions of this high TG resin are harsh, requiring more than 220 ° C, and the molding time is more than 4 hours, the output is low, the molding cost is high, and it is difficult to apply on a large scale; secondly, the material is expensive, and its price is ordinary TG It is more than 10 times that of resin, and the large-scale promotion is limited; third, the interlayer bonding strength of the material is poor, and it is difficult to withstand high tire pressure; fourth, the material is relatively brittle, and the impact resistance strength is low, resulting in a Under the circumstances, if it hits the impact, the rim is easily damaged, and it is also easy to cause injury to the rider

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