Method for manufacturing a pipe

Abstract

The present invention relates to a method for manufacturing a pipe, including: a rolling step of arranging a plurality of carbon threads such that the carbon threads tightly contact an outer surface of a mandrel; a heat-molding step of heating the mandrel in a furnace so as to compressively heat the carbon threads such that the latter are molded into a pipe; and a drawing step of removing a compression tape from the molded pipe, and separating the pipe from the mandrel.

Description

TECHNICAL FIELD[0001]The present invention relates to a method for manufacturing a pipe, and more particularly, to a method for manufacturing a pipe, whereby the pipe is light-weight compared to a related art and maintains a maximum strength.BACKGROUND ART[0002]Pipes are currently used in various fields, such as a fishing rod, a golf club, a badminton racket, a climbing stick, a ski stick, an archery arrow, a bicycle, a tent pole, kayak and canoe paddles, a yacht pole, umbrella ribs, an umbrella pole, a parasol pole, and the like.[0003]These various types of pipes according to the related art are mainly manufactured using a metal material, glass, or a carbon material.[0004]For example, fishing rods according to the related art are mainly manufactured using glass or carbon.[0005]However, fishing rods manufactured using glass have good flexibility and a strong tensile force but are heavyweight. Contrary to this, fishing rods manufactured using a carbon material are light-weight and ha...

AI Technical Summary

Benefits of technology

The present invention provides a method for manufacturing a pipe using carbon threads instead of carbon fabric, which simplifies the process and reduces manufacturing time and cost. The carbon threads are woven on a mandrel to form protrusion patterns on the inner surface of the pipe, improving its rigidity and flexibility. The method also solves the problem of eccentric load that may cause the pipe to break. Overall, the method produces a light-weight, strong, and high-quality pipe at a low price.

Problems solved by technology

However, fishing rods manufactured using glass have good flexibility and a strong tensile force but are heavyweight.

Contrary to this, fishing rods manufactured using a carbon material are light-weight and have a strong repulsive force against elasticity but have a very weak tensile force compared to fishing rods manufactured using glass and have weak shock resistance and thus are easily broken due to small shock.

However, in the method for manufacturing the pipe according to the related art, since the thickness of the Kevlar fiber woven with the carbon fiber or the Kevlar fabric having the shape of the textile that tightly contacts the carbon fabric, which are used to reinforce the strength of the pipe, is very large, for example, each tube of a fishing rod that forms a joint of the fishing rod from a tip to a handle of the fishing rod, is molded very thick, or the carbon fabric is wound around the fishing rod in a state where a cross-section of the carbon fabric is eccentric such that it is difficult to apply the carbon fabric to a process, and when the carbon fabric is wound around the fishing rod in an eccentric state, the eccentric portion and a non-eccentric portion intersect each other, and a load occurs due to the intersecting portion such that the pipe (fishing rod) in one of the eccentric portion and the non-eccentric portion is broken.

In addition, since the Kevlar fabric having the shape of the textile is heavy and is very expensive, the entire strength of the pipe manufactured using the carbon material can be improved; however, light-weight that is the most intrinsic characteristic of the pipe manufactured using the carbon material, cannot be achieved, and cost for manufacturing the pipe increases and causes an economical burden to consumers.

Also, according to the related art, when the carbon fabric is wound around fishing rod to be eccentric, a load is concentrated on one side so that the pipe may be easily broken.

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