JPH057444A - Production of fishing rod - Google Patents

Abstract

PURPOSE:To readily produce a highly strong fishing rod free from the fluctuation in the thickness of each layer thereof and the meandering of highly strong fibers contained therein, by winding prepregs comprising the highly strong fibers impregnated with a synthetic resin in specific states so as to form an inner layer, an intermediate layer and an outer layer concentrically. CONSTITUTION:In a method for producing the objective fishing rod by winding prepregs comprising highly strong fibers impregnated a synthetic resin so as to form an inner layer, an intermediate layer and an outer layer concentrically, the improvement comprises forming the inner layer 11 by spirally and closely winding a tape-like thin prepreg 25 containing the highly strong fibers in the longitudinal direction on a mandrel 23, forming the intermediate layer 13 by winding a relatively thick prepreg sheet containing the highly strong fibers in the axial direction on the inner layer 11, and further forming the outer layer by winding a relatively thin prepreg sheet containing the highly strong fibers in the circumferential direction on the intermediate layer 13 so that the relatively thin prepreg sheet is partially overlapped at a winding end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a fishing rod in which a high-strength fiber is wound with a prepreg impregnated with a synthetic resin to concentrically form an inner layer, an intermediate layer and an outer layer.

[0002]

2. Description of the Related Art Conventionally, as a fishing rod in which a plurality of high-strength fiber layers are concentrically formed by winding a prepreg in which high-strength fibers are impregnated with a synthetic resin, for example, Japanese Utility Model 2-4
The one disclosed in Japanese Patent No. 6286 is known.

In the fishing rod disclosed in Japanese Utility Model Publication No. 2-46286, the fishing rod is composed of three layers, an inner layer, an intermediate layer and an outer layer, and the inner layer is wound with a prepreg sheet in which high strength fibers are aligned in the circumferential direction. The intermediate layer is formed by winding a prepreg sheet in which high-strength fibers are aligned in the axial direction, and the outer layer is tape-shaped with the fiber direction of the high-strength fibers in the longitudinal direction. It is formed by winding the prepreg.

In such a fishing rod, the fiber direction is different from that of the intermediate layer in the inner layer and the outer layer, so that the bending strength and the crushing strength of the fishing rod can be improved.

[0005]

However, in such a conventional fishing rod, since the inner layer is formed by winding a prepreg sheet in which high-strength fibers are aligned in the circumferential direction, the prepreg sheet is formed on the mandrel. When wound, the winding end of the prepreg sheet is partially polymerized to form a step, and the winding end of the prepreg sheet easily separates from the mandrel and warps, and an intermediate layer is formed on the outside of the prepreg sheet. When the prepreg sheet for winding is wound, there is a problem that the high-strength fibers of the prepreg sheet for forming the intermediate layer meander, and the thickness of the prepreg sheet changes, and bending strength and the like decrease.

Further, since the outer layer is formed by winding a tape-shaped prepreg on the outside of the intermediate layer, a circumferential force is exerted on the high-strength fiber of the intermediate layer when the tape-shaped prepreg is wound. There is a problem in that the high-strength fiber of the intermediate layer is twisted due to the action, and the pressing force during winding is insufficient.

Furthermore, since the outer layer is formed by winding the tape-shaped prepreg, the high-strength fibers are circumferentially continuous, the diameter is reduced during molding, and the inclination and meandering of the high-strength fibers are increased. However, there is a problem that the strength is lowered.

Further, when the tape-shaped prepreg is wound on the outside of the intermediate layer, it is difficult to wind the tape-shaped prepreg so that both end edges of the tape-shaped prepreg are aligned with each other, and there are openings and overlapping portions. There is a risk of damaging the high-strength fibers of the intermediate layer during winding.

The present invention has been made in order to solve the above-mentioned conventional problems, and it is possible to easily manufacture a fishing rod having high strength without variations in wall thickness of each layer and meandering of high-strength fibers. It is intended to provide a manufacturing method.

[0010]

A method of manufacturing a fishing rod according to the present invention comprises forming a inner layer, an intermediate layer and an outer layer in a concentric manner by winding a prepreg in which high strength fibers are impregnated with a synthetic resin. And an outer layer are formed by arranging high-strength fibers in the circumferential direction, and the intermediate layer is a method for manufacturing a fishing rod formed by arranging high-strength fibers in the axial direction, wherein the inner layer has a high strength. A tape-shaped thin-walled prepreg with the fiber direction of the fiber as the longitudinal direction is formed by closely winding spirally around a mandrel, the intermediate layer is provided outside the inner layer, and the fiber direction of the high-strength fiber is set. Formed by winding a relatively thick prepreg sheet with the axial length direction,
Furthermore, the outer layer is formed by winding a relatively thin prepreg sheet having a high strength fiber in the circumferential direction on the outer side of the intermediate layer so that the winding end part is partially polymerized. It is a thing.

[0011]

In the method for manufacturing a fishing rod of the present invention, the inner layer is formed by spirally densely winding a tape-shaped thin-walled prepreg with the fiber direction of the high-strength fiber in the longitudinal direction on the mandrel, The layer is formed by winding a relatively thick prepreg sheet having the axial direction in the fiber direction of the high-strength fiber on the outside of the inner layer, and further, the outer layer,
On the outside of the intermediate layer, a relatively thin prepreg sheet having a high strength fiber in the circumferential direction and wound in a circumferential direction is wound such that the winding end ends are partially polymerized.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of a method for manufacturing a fishing rod according to the present invention, and FIG. 2 shows a fishing rod manufactured by the method for manufacturing a fishing rod shown in FIG.

In the fishing rod shown in FIG. 2, a high-strength fiber made of carbon fiber is wound with a prepreg impregnated with a synthetic resin made of epoxy resin to form an inner layer 11, an intermediate layer 13, and an outer layer 15. The high-strength fiber layer is formed concentrically.

The inner layer 11 and the outer layer 15 are formed by arranging high-strength fibers 17 and 19 in the circumferential direction, and the intermediate layer 1
3 is formed by arranging high strength fibers 21 in the axial direction. Such a fishing rod is manufactured as described below by an embodiment of the method for manufacturing a fishing rod of the present invention.

That is, first, as shown in FIG. 1A, a mandrel 23 is prepared, and a release wax is applied to the surface of the mandrel 23. In this embodiment, it is not necessary to apply a temporary fixing resin or the like.

Thereafter, as shown in (b), a tape-shaped thin-walled prepreg 25 whose longitudinal direction is the fiber direction of the high-strength fiber 17 made of, for example, carbon fiber is spirally and densely wound around the mandrel 23. The inner layer 11 is formed by turning.

The tape-shaped thin prepreg 25 has, for example, a width of about 3 to 10 mm and a thickness of 0.01 to 0.04 mm.
And the release tape 2 made of polypropylene, for example.
It is attached detachably to 7.

The tape-shaped thin-walled prepreg 25 is spirally and tightly wound around the mandrel 23 at an angle θ of, for example, 75 ° to 90 °, together with the release tape 27, while winding or at the end of winding. After that, the release tape 27 is removed.

Thereafter, as shown in (c) and (d), the intermediate layer 13 is formed on the outer side of the inner layer 11, and the high-strength fiber 21 is formed.
Is formed by winding a relatively thick prepreg sheet 29 having the fiber direction of (1) as the axial direction, and
The outer layer 15 is formed by winding a relatively thin prepreg sheet 31 with the fiber direction of the high-strength fiber 15 in the circumferential direction on the outside of the intermediate layer 13 so that the winding end ends are partially polymerized. It

In this embodiment, the prepreg sheet 29 for forming the intermediate layer 13 has a length such that it can be wound twice, and the prepreg sheet 31 for forming the outer layer 15 is formed.
Is connected to one end of the prepreg sheet 29 for forming the intermediate layer 13 and has a length that allows one winding.

The prepreg sheet 29 for forming the intermediate layer 13 has a synthetic resin ratio of 25% by weight or less, and the prepreg sheet 31 for forming the outer layer 15 has a synthetic resin ratio of 35% by weight or more. 0.01 ~ 0.04 thickness
It is said to be mm.

As shown in (d), the prepreg sheets 29 and 31 for forming the intermediate layer 13 and the outer layer 15 have the mandrel 23 and the prepreg sheets 29 and 31 placed on the table 33, respectively. Mandrel 23
The mandrel 23 by a sheet rolling method in which the pressing plate 35 is brought into contact with the upper part of the sheet and the pressing plate 35 is moved in the arrow A direction.
Is wound around.

Thereafter, as shown in (e), taping for winding a tape 37 is performed on the outer side of the outer layer 15, firing for heating and curing each of the layers 11, 13, 15 is performed, and further, the mandrel 23. The tape 37 is removed, and a predetermined fishing rod is manufactured.

Therefore, in the above-mentioned method for manufacturing a fishing rod,
The inner layer 11 is a tape-shaped thin-walled prepreg 25 whose longitudinal direction is the fiber direction of the high-strength fiber 17, and the mandrel 23.
And the intermediate layer 13
Is formed by winding a relatively thick prepreg sheet 29 having the fiber direction of the high-strength fiber 21 as the axial direction on the outer side of the inner layer 11, and further, the outer layer 15 on the outer side of the intermediate layer 13. In addition, since the prepreg sheet 31 having a relatively thin wall thickness with the fiber direction of the high-strength fiber 19 in the circumferential direction is wound so as to partially overlap the winding end, the layers 11 and 13 are formed. , 15 and the high-strength fibers 17, 19, 21 without meandering, etc., the fishing rod with high strength can be easily manufactured.

That is, in the above-described method for manufacturing a fishing rod,
The inner layer 11 is formed of a tape-shaped thin-walled prepreg 25 having the fiber direction of the high-strength fiber 17 as the longitudinal direction.
This tape-shaped thin-walled prepreg 25 is used for the mandrel 2
Since it is directly wound around 3, the winding is very easy, and even when the pulling force of the thin-walled prepreg 25 at the time of winding is small, the high-strength fiber 17 is less likely to meander during molding, and Since the tape-shaped thin-walled prepreg 25 is continuously wound in a spiral shape, unevenness is relatively rarely formed on the outer surface of the inner layer 11, and the thickness of the intermediate layer 13 can be made uniform. Become.

Further, the outer layer 15 is provided on the outer side of the intermediate layer 13,
Since the relatively thin prepreg sheet 31 having the fiber direction of the high-strength fiber 19 in the circumferential direction is wound so as to partially overlap the winding end, the tape-shaped prepreg is wound. As in the case of rotating to form the outer layer, a circumferential force acts on the high-strength fiber 21 of the intermediate layer 13, the high-strength fiber 21 of the intermediate layer 13 is twisted, and the pressing force at the time of winding is insufficient. Will disappear.

Further, the high-strength fibers 19 of the outer layer 15 do not become continuous in the circumferential direction as in the case of winding the tape-shaped prepreg to form the outer layer, and the diameter is reduced at the time of molding, resulting in high The inclination and meandering of the strength fiber 19 will not increase and the strength will not decrease.

Further, the outer layer 15 is provided on the outer side of the intermediate layer 13, and a relatively thin prepreg sheet 31 whose circumferential direction is the fiber direction of the high-strength fiber 19 is formed so that the winding end part is partially polymerized. Since it is formed by winding, it is possible to reliably eliminate the occurrence of openings.

Further, in the above-mentioned embodiment, since the intermediate layer 13 and the outer layer 15 are formed by the sheet rolling method, when the outer layer 15 is wound, the intermediate layer 13 and the intermediate layer 13 are surely wound in a pressurized state. can do.

In the above-mentioned embodiment, the inner diameter of the fishing rod is set to 20 mm, the inner layer 11 is formed by winding once a tape-shaped thin-walled prepreg 25 having a wall thickness of 0.03 mm and a fiber amount of 30 g / m ^2. , an intermediate layer 13, the thickness 0.15 mm, the prepreg sheet 29 of fiber content 30 g / m ² formed by turning twice winding, the outer layer 15, the thickness 0.03 mm, the prepreg sheet 31 of 30 g / m ² For the fishing rod formed by winding once, the pipe 4-point bending test result shows that the bending strength is 67.10 kg / mm ² , 68.10 kg /
mm ² , 66.87 kg / mm ² , 66.71 kg / mm ² , 6
7.83 kg / mm ² , with an average bending strength of 67.3
It was ² kg / mm ² .

On the other hand, the inner diameter of the fishing rod is 20 mm and the inner layer is
Wall thickness 0.03 mm, fiber amount 30 g / m ²Prepregsy
It is formed by winding a single layer, and the intermediate layer is
Weighing capacity 30g / m²Roll the prepreg sheet of
The outer layer is made 0.03mm thick, 30g / m²Tape
With a fishing rod formed by winding a single prepreg,
The 4-point bending test results show that the bending strength is
Degree is 68.96 kg / mm², 70.18kg / mm², 5
9.32 kg / mm², 68.59kg / mm², 65.45kg
/ Mm²And the average bending strength is 66.50 kg / mm²And
In the fishing rod of the example, the bending strength was significantly improved.
Also, it can be seen that the variation in bending strength is small.

[0032]

As described above, the method of manufacturing a fishing rod of the present invention has an advantage that it is possible to easily manufacture a fishing rod having high strength without variations in wall thickness of each layer and meandering of high-strength fibers. is there.

[Brief description of drawings]

FIG. 1 is a process drawing showing an embodiment of a method for manufacturing a fishing rod according to the present invention.

FIG. 2 is a perspective view showing a fishing rod manufactured by the manufacturing method of FIG. 1 in a stripped state.

[Explanation of symbols]

 11 Inner layer 13 Middle layer 15 Outer layer 17,19,21 High-strength fiber 23 Mandrel 25 Thin-walled prepreg 29,31 Prepreg sheet

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area // B29K 105: 08 4F B29L 23:22

Claims (1)

Claim: What is claimed is: 1. An inner layer, an intermediate layer and an outer layer are formed concentrically by winding a prepreg in which high strength fibers are impregnated with a synthetic resin, and the inner layer and the outer layer have high strength. In the method of manufacturing a fishing rod, wherein fibers are formed by arranging them in the circumferential direction, and the intermediate layer is formed by arranging high-strength fibers in the axial direction, and the inner layer is the longitudinal direction of the high-strength fibers. The tape-shaped thin-walled prepreg was formed by closely winding spirally around the mandrel, and the intermediate layer was formed on the outer side of the inner layer with the fiber direction of the high-strength fiber in the axial direction. Formed by winding a relatively thick prepreg sheet of, further, the outer layer, outside the intermediate layer,
A method of manufacturing a fishing rod, comprising forming a relatively thin prepreg sheet having a high strength fiber in a circumferential direction in a circumferential direction and winding the prepreg sheet so that a winding end portion is partially polymerized.