Rowing with superfine fibre and its formation

Abstract

A super-fibrous racing boat has a sandwich structure composed of the external and internal jackets prepared from the pre-dipped poly-p-phenylene benzobisthiazole (PBO) super-fibers and the sandwich prepared from the cellular material Nomex. Its advantages are high specific strength, high specific modulus, high impact strength, high rigidity and light weight.

Description

technical field [0001] The invention relates to an Olympic sports competition equipment, in particular to a superfiber rowing boat and its forming process. Background technique [0002] Rowing is a gold medal-rich project in large-scale sports such as the Olympic Games. Due to the particularity of the use environment and events, the rowing boat should have superior performance, and its specific strength, specific modulus and impact strength requirements are consistent with those of aerospace vehicles. Most of the current rowing boats are made of aramid fiber / carbon fiber and Nomex honeycomb sandwich structure. Due to the limitation of material performance and molding process, its comprehensive performance index is still low, and it cannot meet the requirements of Olympic equipment "lighter, stronger and faster". High standards and high requirements, there are the following defects and deficiencies: [0003] (1) The contradiction between hull stiffness and hull quality is d...

AI Technical Summary

Problems solved by technology

Most of the current rowing boats are made of aramid fiber / carbon fiber and Nomex honeycomb sandwich structure. Due to the limitation of material performance and molding process, its comprehensive performance index is still low, and it cannot meet the requirements of Olympic equipment "lighter, stronger and faster". High standards and high requirements, there are the following defects and deficiencies:

[0003] (1) The contradiction between hull stiffness and hull quality is difficult to solve

Due to the limitations of existing materials, structures and molding processes, it is difficult to achieve the best of both worlds in hull rigidity and hull quality

[0004] (2) Poor impact strength of hull

Especially for rowing boats with full carbon fiber honeycomb structure, they will be damaged if there is a slight bump during transportation, storage, training and competition; and the rowing boats made of this material lack the necessary sense of sports elasticity

[0005] (3) The hull is easy to absorb moisture and increase in weight

Under normal conditions, the weight of the hull will increase by as much as 10% after 1 to 2 years of use; at the same time, the long-term erosion of water on the composite material structure of the hull will greatly reduce the rigidity of the hull, and the service life of the rowing boat will also be extended accordingly. discount

[0006] (4) The molding process is backward

Most of the current composite rowing boats are manufactured by extensive wet forming process. This method is greatly affected by the interference of seasons, climate and human factors, which makes it difficult to control the quality of the boat body and realize the standardized production of rowing boats; in addition , it is easy to lose glue and hang glue in production, which will lead to unstable performance of rowing boats

[0007] (5) The working environment is polluted and the labor intensity of the workers is high

Due to the wet construction, on-site preparation of glue, blanking and layering construction is required. The workplace, forming molds, equipment tools and workers will inevitably be polluted by resin and other various wastes, and it is impossible to achieve safe, civilized construction and construction. Ensuring the physical and mental health of workers

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