Method for forming fiber pipe piece

Abstract

The invention relates to a method for forming a fiber pipe piece. Fiber cloth is coated outside an air bag; liquid and expansion powder which are used for shaping the air bag in different time periods are filled in the air bag; through heating and pressurizing solidification formation, gas is formed by the liquid to achieve a shaping effect, the expansion powder is expanded to achieve the shaping effect, and the air bag can be sequentially shaped for two times according to different shaping time of the liquid and the expansion powder; therefore, the liquid and the expansion powder are filled into the air bag, and the air bag can be shaped for two times in different time periods along with temperature rise in the heating and pressurizing solidification process, so that the uniformity of the pipe wall of the fiber pipe piece can be effectively improved, cracks are prevented from being generated, and the fiber pipe piece is high in density; and materials in a pipe core are easy to extract, and the using amount of the expansion powder is reduced, so that the production cost is reduced.

Description

technical field [0001] The invention relates to a molding method of fiber pipes, such as carbon fiber pipes, glass fiber pipes, etc., which can be widely used in fields such as rackets and bicycle frames. Background technique [0002] With the continuous development of composite materials, carbon / glass fiber pipe fittings are widely used in sports rackets, car frames and other fields due to their light weight, high strength and good elasticity, which far exceed steel or aluminum alloy pipe fittings. At present, there are many ways to form carbon / glass fiber pipe fittings. There is an air bag inflation forming method alone, which will cause uneven pipe walls and cracks due to the instantaneous instability of the pressure of the gas inflated; or use expansion alone. The powder expansion molding method not only causes unevenness and cracks in the forming tube wall due to the instantaneous rapid expansion of the expansion powder, but also makes it difficult to extract the expans...

AI Technical Summary

Problems solved by technology

At present, there are many ways to form carbon / glass fiber pipe fittings. There is an air bag inflation forming method alone, which will cause uneven pipe walls and cracks due to the instantaneous instability of the pressure of the gas inflated; or use expansion alone. The powder expansion molding method not only causes unevenness and cracks in the forming tube wall due to the instantaneous rapid expansion of the expansion powder, but also makes it difficult to extract the expansion material, which brings inconvenience to production and processing

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