JPS63317320A - Manufacture of fishing pole - Google Patents

Abstract

PURPOSE:To vary smoothly the deflective properties of a fishing pole at its bonded sections and prevent stress from concentrating and prevent the fishing pole from getting damaged by cutting off bonding polymerized sections of respective prepregs approximately into triangle, winding and then t aping, heat curing and removing a core at the time of winding prepregs of different kind in front and rear sections of a tapered core bar. CONSTITUTION:At the time of winding respectively a prepreg 2 constituted to glass reinforced fibers of low elastic modulus impregnated with heat curing synthetic resin on the front side of a tapered core bar 1 and a prepreg 3 constituted of carbon reinforced glass of high elastic modulus impregnated with heat curing synthetic resin on the rear side, the bonding polymerized sections of both prepregs 2 and 3 are cut off as shown by 2' and 3' respectively in the form of triangle and wound around the core bar 1, and then a tape is wound around the outer peripheral surfaces of the prepregs 2 and 3, heat cured and the core bar 1 is removed to manufacture a fishing pole. The thickness and the outer diameter of the bonded section of the materials of different quality on the manufactured fishing pole are not changed suddenly, and as the thickness is smooth and uniform all over, deflective properties at the bonded section is natural to prevent stress from concentrating and the fishing pole from getting damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of manufacturing a fishing rod by winding prepreg around a metal core.

Conventional technology In order to change the properties such as the elasticity and strength of the tip and rear end of the fishing rod, such as a fishing rod where the tip of the rod has a soft tone and the back of the rod has a hard tone, the front and rear parts of the core metal are The production of fishing rods by wrapping different types of prepregs was developed in 1988-79958.
It is known from the publication No.

However, the conventional method has the disadvantage that the diameter and wall thickness at the joint between the front and rear prepregs of different types vary significantly, the joint has unnatural flexibility, and is insufficient in strength and easily breaks.

Problems to be Solved by the Invention The present invention aims to minimize changes in the wall thickness and diameter of the joints of fishing rods made of different materials, thereby smoothing the flexibility of the fishing rod at the joints. It is an object of the present invention to manufacture a fishing rod which is designed to allow the fishing rod to change its shape while also preventing concentration of stress and thereby preventing breakage of the fishing rod.

Means for Solving the Problems The present invention, as a means for achieving the above-mentioned object, has a structure in which, when winding different kinds of prepregs around the front and rear parts of a tapered core metal, the joining and overlapping portions of the respective prepregs are formed into a substantially triangular shape. After cutting and wrapping, the gist is to perform taping, heat curing treatment, and decore using conventional methods.

Function: At the joining and overlapping part of the prepregs made of different materials, the prepreg on the stem side gradually decreases toward the rear end, and the prepreg on the rear side gradually decreases toward the front end, and the prepregs of different materials are wrapped around the core metal. This prevents sudden changes in wall thickness and outer diameter at the joint.

EXAMPLE To explain the details of the present invention with reference to the drawings, a prepreg 2 formed by impregnating a thermosetting synthetic resin made of glass reinforcing fiber with a low modulus of elasticity is attached to the front side of a tapered core bar 1, and When winding the prepregs 3 made of carbon reinforced fibers with high elastic modulus and impregnated with thermosetting synthetic resin on the sides, the joining and overlapping parts of both prepregs 2 and 3 are cut out into a substantially triangular shape 2'.・After wrapping the prepregs 2 and 3 around the core 1, tie tape around the outer circumferential surface of the wrapped portion of the prepregs 2 and 3 using a conventional method, heat harden the prepregs, and remove the core 1 to manufacture a fishing rod. It is something to do.

The means for cutting off the prepregs 2 and 3 includes cutting off the winding start end side of the prepreg 2 and cutting off the winding end side of the prepreg 3 as shown in FIGS. As shown in the example shown in FIG.
As shown in the figure, the prepreg 2 may be wound around the core metal 1 first, or the prepreg 3 may be wound around the core metal 1 first as shown in FIG. The part corresponding to
As shown in the figure, it is also possible to form a transition taper portion 1' that is larger than the front and rear tapers.

Effects of the Invention In the present invention, when winding prepregs of different properties around a tapered core metal in order to adjust the rod tension, the joining and overlapping parts of each prepreg are cut out into a substantially triangular shape and then wound. ,
Because fishing rods are manufactured using conventional methods, the quality and outer diameter of the joints of different materials in the manufactured fishing rods do not change abruptly, the transition is smooth and uniform in thickness, and the flexibility at the joints is natural and bendable. This prevents stress concentration and breakage.
It has excellent characteristics that make it particularly suitable for manufacturing tip rods that are small in diameter and easily break.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams showing the manufacturing process of the present invention, FIG. 4 is a front view of the same product, and FIG. 5 is a sectional view of the main parts,
FIGS. 6 and 7 are explanatory diagrams showing the manufacturing process of another embodiment of the present invention, and FIGS. 8 to 10 are explanatory diagrams showing the manufacturing process of still another embodiment of the invention. 1...Core metal, 2.3...Prepreg. 2', 3'...Resection part.

Claims (1)

[Claims] When winding different types of prepregs on the front and rear of a tapered core metal, the overlapping parts of each prepreg are cut out into a roughly triangular shape and wound, and then taping, heat curing treatment, and core removal are performed using conventional methods. How to make fishing rods.