JP3154308B2 - Ear rod and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head rod using a thermoplastic resin as a matrix and a method of manufacturing the head rod.

[0002]

2. Description of the Related Art Conventionally, a tip rod used at the tip of a fishing rod is disclosed in, for example,
-69975. This is a spike rod in which a reinforcing fiber bundle impregnated with a thermosetting resin is heat-formed, a solid core on the center side is formed by polishing, and the outside of the solid core is coated with a thermoplastic resin thickly.

A fishing rod made of bamboo fiber has been proposed in Japanese Patent Publication No. 46-40741 in order to solve the problem that a fishing rod made of fiber reinforced plastic cannot catch fish signals sensitively and that it is too flexible and stiff. No. 6,086,045.

[0004]

However, the former is insufficient in strength and it is difficult to obtain a sticky rod with good flexibility, and the latter is made of actual bamboo. Therefore, there is a problem in terms of mass productivity, and there is a big problem that the cost is increased. On the other hand, a sticky rod with good flexibility and flexibility, such as a bamboo rod or a spikelet, is desired.

Accordingly, an object of the present invention is to provide a mass-produced head rod, such as a bamboo rod or a spikelet, which has good tenacity and flexibility, and a method of manufacturing the same.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned object, the present invention relates to a thermoplastic resin having a matrix in which reinforcing fibers are aligned in the axial direction and reinforcing fibers in an outer layer.
Increase the ratio or use a low elasticity and reinforced fiber ratio
The present invention provides a spikestick characterized by having a plurality of three or more layers having reinforcing fibers, the size of which is reduced . In addition, the mixing ratio between the thermoplastic resin fiber and the reinforcing fiber is different, and a plurality of sheets in which the reinforcing fiber is aligned in one direction are prepared, and the sheet having the different ratio is aligned in the axial direction. The present invention provides a method for producing a spikestick, comprising winding a laminate so as to obtain a reinforcing fiber and integrating the reinforcing fiber with a thermoplastic resin by heat treatment.

[0007]

The thermoplastic resin has a lower resin fluidity than the thermosetting resin. For this reason, a plurality of sheets having different mixing ratios of the thermoplastic resin and the reinforcing fibers are prepared, and the sheets are wound in a laminated shape such that the alignment direction of each sheet is in the axial direction, and then heated to form the reinforcing fibers. When the thermoplastic resin is integrated, the resin of each layer hardly flows to the adjacent layer, and the initial mixing ratio of the reinforcing fibers is maintained almost as it is, and a plurality of layers having different reinforcing fiber ratios in the radial direction are formed. The tip
So as to have three or more layers having reinforcing fibers,
The ratio of reinforcing fibers in the outer layer is large or low
If the ratio of the reinforcing fibers is low , the sticky rod has good stickiness and flexibility and resembles a bamboo rod or a spikelet.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 shows a tip rod 10, which is formed of reinforcing fibers using a thermoplastic resin as a matrix.

As the reinforcing fibers S, carbon fibers,
High elastic fibers such as glass fibers and aramid fibers are used, but known low elastic fibers may be used. As the thermoplastic resin, for example, polyether ether ketone (PE
EK), polyetherimide (PEI), polycarbonate (PC), polyphenylene sulfide (PP
S), polyether sulfide (PES), polyamide (PA), polyethylene terephthalate (PET),
Polybutylene terephthalate (PBT), polypropylene (PP), and ABS resin (ABS) are used.

FIG. 2 is an enlarged cross-sectional view taken along line BB of FIG. From the inner peripheral side, the first
The layer 12, the second layer 14, the third layer 16, and the fourth
The tip rod 10 is composed of four layers called a layer 18. First layer 1
The second to third layers are layers in which the reinforcing fibers S and the thermoplastic resin J aligned in the longitudinal direction of the spike are integrally and closely mixed, and the fourth layer 18 as the outermost layer is a protective coating layer. It is. The first layer 12 is a layer having a small proportion of reinforcing fibers, the third layer 16 is a layer having the largest proportion of reinforcing fibers, and the second layer 14 is a layer having a largest proportion of reinforcing fibers.
Is a middle ratio layer. The volume ratio of the reinforcing fibers S in each of the layers 12, 14, 16 is 10 to 50%, and 20 to 50, respectively.
%, About 30 to 60%, for example, each layer 1
The volume ratio of the reinforcing fibers S of 2, 14, and 16 is 30%, respectively.
40% and 50%.

As described above, the tip rod 1 according to the first embodiment of the present invention.
In the case of 0, the fiber ratio is higher toward the outer side, the fibers are aligned in the longitudinal direction, and has a structure similar to bamboo.

FIG. 3 is a cross-sectional view of a tip rod 10 'according to a second embodiment of the present invention.
Fibers 2 and 24 are aligned in the longitudinal direction. The first layer 20, which is the innermost layer, has the largest proportion of the reinforcing fibers S and has a small proportion of the thermoplastic resin J, and the second layer 22 outside thereof has the small proportion of the reinforcing fibers S and has a small proportion of the thermoplastic resin J. large. The third layer 24 has the smallest ratio of the reinforcing fibers S. In addition, the fibers are selected such that the elasticity decreases as the position moves from the first layer 20, the second layer 22, and the third layer 24, and the elongation increases toward the outside. Further, it is desirable that the first layer 20 has high crush resistance, and the second layer 22 and the third layer 24 have high breaking strength. First layer 20, second layer 2 as examples of reinforcing fibers S
The second and third layers 24 each have, for example, an elastic modulus of 40 ton /
mm ² as high modulus carbon fiber, modulus carbon fibers in the order of 24 ton / mm ^2, using the low modulus carbon fibers of about 15 ton / mm ^2, the respective layers 20, 22, 24
Is 30-60%, 20-50%,
The range is about 10 to 40%, for example, 50%, 40%
% And 30%.

Accordingly, the tip rod 10 'of the second embodiment bends very well like a spikelet and recovers again, resulting in a sticky tip rod.

Next, a method for manufacturing a bamboo rod-like spikestick 10 according to the present invention will be described with reference to FIGS. For example, the sheet 14 ″ forming the second layer 14 in FIG.
FIG. 5 and FIG. The sheet 14 ″ has a fiber bundle 140 in which reinforcing fibers S and thermoplastic resin fibers J ′ are mixed in a rope shape aligned in one direction, and the thermoplastic fiber is laterally aligned with the aligned fiber bundle 140. The sheet shape is maintained by passing the resin fibers J ′ through a coarse woven cloth.

Further, the fiber bundle 140 may be formed of only the reinforcing fibers S and only the thermoplastic resin fibers J ', and these may be arranged at a predetermined mixing ratio. Further, it is considered that the surface of the reinforcing fiber is coated with a thermoplastic resin, the surface of the bundle of the reinforcing fiber is coated with the thermoplastic resin, the one using a short resin fiber, and the like, and in the present invention, these are not limited. .

Sheets for forming the other layers 12 and 16 are prepared and prepared in the same manner. On the other hand, the inner mold 26 for forming the cavity 11 has a core metal 27 and a pressing force adjusting member 28 formed of a silicon tube or the like. Each sheet prepared outside the pressure adjusting member 28 is wound in layers.
As a result, as shown in FIG.
2 ', a second layer corresponding portion 14', and a third layer corresponding portion 16 'are formed, and an outer die 30 including an upper die 30A and a lower die 30B is clamped outside the third layer corresponding portion 16'. I do.

Thereafter, pressure is applied to the pressure adjusting member 28 by hydraulic pressure or air pressure. A pressing force is also applied to the outer mold 30 by hydraulic pressure or air pressure. In this case, if the predetermined pressing force can be applied only by the outer mold 30, the pressing force adjusting member 28 is not required. Next, ± 30 ° C. of the melting point of the thermoplastic resin
, The molten thermoplastic resin is spread between the reinforcing fibers, and the reinforcing fibers are integrally molded with the thermoplastic resin.
In this case, since the resin is a thermoplastic resin unlike a thermosetting resin, the resin fluidity is small, and each layer corresponding portion 12 ′,
A predetermined proportion of thermoplastic resin 14 ', 16' remains in each layer 12, 14, 16 almost as is.

After the heat treatment, the outer mold 30 is removed, and then the inner mold 26 is removed. Finally, if a coating layer 18 coated with a paint is formed as an outer skin layer, the tip rod 10 having a cross section in FIG. 2 is formed. The tip rod 10 'in FIG. 3 does not need an inner mold because it has no cavity, but the other points are basically the same as the above-described manufacturing method.

In addition to the above-described manufacturing method, there is also a pultrusion molding method using a mold. According to this method, a spikelet which is formed in an annularly wound shape in advance is prepared and pulled out so as to be squeezed by a drawing hole of a heated mold. The heat at that time melts the thermoplastic resin fibers and integrates them with the reinforcing fibers, and then cools to complete the ears.

[0020]

As is apparent from the above description, the tip of the present invention comprises a plurality of layers having different characteristics. Therefore, if the outer layer has a high fiber ratio, the tip has characteristics close to that of a bamboo rod. If it becomes a rod and the outside is made of low elastic fiber and the fiber ratio is reduced, it becomes a head rod with characteristics close to whale ears, and it becomes a sticky and highly flexible head rod. Further, according to the method of manufacturing the spikestick of the present invention, the thermoplastic resin of each layer hardly flows into the adjacent layer, and the resin ratio (fiber ratio) in a state of being wound in a laminated state before the heat treatment is reduced. A head rod that is held as it is and has a plurality of layers with different characteristics can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a side view of a spike according to the present invention.

FIG. 2 is a cross-sectional view taken along line BB of FIG. 1;

FIG. 3 is a cross-sectional view similar to FIG. 2 of another spikestick.

FIG. 4 is a cross-sectional view of a process of manufacturing the spike of FIG. 1;

FIG. 5 is a partially enlarged view of the alignment sheet for manufacturing the tip rod.

FIG. 6 is an enlarged sectional view of a fiber bundle of the aligned sheet of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ear rod 12 1st layer 14 2nd layer 16 3rd layer 26 Inner type 30 Outer type J Thermoplastic resin J 'Thermoplastic resin fiber S Reinforcing fiber

Claims (2)

(57) [Claims] 1. A thermoplastic resin as a matrix, wherein reinforcing fibers are aligned in an axial direction and an outer layer is formed.
Increase the reinforcing fiber ratio of
A spike rod comprising a plurality of layers of three or more layers having reinforcing fibers, the ratio of which is reduced . 2. A plurality of sheets having different mixing ratios between thermoplastic resin fibers and reinforcing fibers and having the reinforcing fibers aligned in one direction are prepared. A method for producing a tip rod, comprising: winding the laminate in a laminated shape such that the reinforcing fibers are integrated with a thermoplastic resin by heating.