JPS6114939A - Method of molding fishing rod - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of forming a hollow rod by using a mandrel and winding prepreg around the mandrel.

(Prior art) A method using a mandrel has traditionally been adopted as a method for forming fishing rods, and the fiber base material of the prepreg wound around the mandrel has also changed with the development of high-strength, high-elastic fibers. , fishing rods are becoming thinner and lighter.

Recently, unidirectionally aligned sheets have been mainly used as prepreg base materials, and as a result, a problem has arisen in that vertical cracks are likely to occur. In order to prevent the phenomenon of vertical cracking of the strings, the woven fabric and unidirectionally aligned sheets are replaced with orthogonal sheets. When the side perpendicular to the tube is a woven fabric or a unidirectionally aligned orthogonal sheet, the fibers are not continuous, so there is a problem that delamination is likely to occur at the end when compressive force is applied to the tube.

As a means to solve this problem, a method has been proposed in which a tape-shaped prepreg impregnated with resin is wound spirally, but in the case of a tape impregnated with resin, the resin sticks during manufacturing, causing the resin to adhere to rollers, etc. This tends to cause the fibers to break, and since the fibers of resin-impregnated tapes are adhered to some extent by the resin, they do not spread even when molded under pressure, resulting in thick molding. Also, because the mandrel used to form tubular objects such as fishing rods is tapered, when wound at a constant speed, the required thick part will not be spaced wide apart, and conversely, if you match it with the thick part, the thin tip will be tighter. It overlaps. In order to make this uniform, it is very difficult to do things such as having to change the rotation speed to match the taper, and even if it were possible, the fibers would be glued with resin and would not spread, resulting in fiber breakage and the desired strength would not be achieved. There are other problems.

One possible way to prevent the phenomenon of delamination is to increase the amount of resin used to bond and integrate the sheets, but increasing the amount of resin increases the thickness of the molded tube and increases the weight. This would go against the weight reduction trend.

(Problems to be Solved by the Invention) In view of the above-mentioned circumstances, the present invention is designed to bend the tubular body in the longitudinal direction without increasing the amount of resin impregnated in the prepreg.
Another object of the present invention is to provide a molding method that can extremely efficiently produce a lightweight, inexpensive tubular body that has high strength against radial compression.

(Means for Solving the Problems) The method of the present invention to solve the above problems involves winding a prepreg made of high-strength, high-elastic fibers impregnated with synthetic resin around a mandrel, and then slightly preceding the winding of cellophane tape. A fiber strip that is not impregnated with synthetic resin is wound in a spiral shape, and a cellophane tape is wound spirally on the fiber strip, and after baking and hardening, only the cellophane tape is removed and the fiber strip is integrated into the tube as it is. I decided to leave it there.

(Function) By the method described above, the prepreg wound around the mandrel is tightened by spiral winding using fiber strips that are not impregnated with synthetic resin, and since the fiber strips are not impregnated with resin, they are spread uniformly. Moreover, the synthetic resin impregnated into the prepreg smoothly penetrates into the fibers and is reliably integrated with the prepreg.

(Example) The following is an explanation based on the drawings. Prepreg (1), which is a carbon fiber aligned sheet impregnated with epoxy resin, (
2) was cut into a ladder shape, and both prepregs (1) were cut into a ladder shape.
(2) is polymerized and wound around the mandrel (3) (Fig. 1 (a), 弽)). The prepreg (2) is placed on the mandrel (3). The fiber direction of the contacting prepreg is arranged in a direction perpendicular to the axis of the mandrel (3), and the prepreg (prepreg (
The direction is parallel to the axis of the fiber direction mandrel (3) in 2).

In addition, prepreg is not limited to a simple aligned sheet; it is also possible to use carbon fiber (1a) in which glass fiber (1b) is woven in a plain weave pattern at appropriate widths, or even woven fabric. It's good.

The above prepreg (1) and (2) are mandrel (3)
The side edges of the prepreg are pasted by ironing, etc., and then the prepreg is rolled using a rolling device.
The sheets are wrapped under pressure using a mandrel (3) to improve the adhesion between the sheets and eliminate air bubbles in the resin.

After wrapping the prepreg (2) around the mandrel (3), a fiber strip (4) that is not impregnated with synthetic resin is wound spirally around the outer circumferential surface of the prepreg, and a cellophane tape (5) is placed on top of it. Wind in a spiral.

To wrap the fiber strips (4) and cellophane tape (5) that are not impregnated with synthetic resin, use a wrapping machine or the like to wrap the prepregs (1) and (2) around a mandrel (3).
) is fixed to the rotating chuck body and the mandrel (3
) and on the other hand, the fiber strip (4) and the cellophane tape (
The holding frame 5) is designed to slide parallel to the axis of the mandrel (3), and holds the ends of the fiber strip (4) and cellophane tape (5) on the mandrel (3) near the chuck body. Attach the fiber strips (4) and cellophane tape (5) to the sides and slide them at a constant speed onto the mandrel (3).
) is wound spirally around the outermost circumference of the prepreg (2) (Figure 1 (C)). (4) is wrapped in cellophane tape (KL) so that it is wound slightly ahead of cellophane tape (5 in), and the spirally wound fiber strip (4) is wrapped in cellophane tape (5 in).
).

The fiber strip (4) that is not impregnated with synthetic resin and is spirally wound on the wound prepreg is yarn of high strength and high elasticity fiber such as carbon fiber or glass fiber, fine mK glass fiber such as titanium or stainless steel, or carbon. Fibers, synthetic fibers, etc. covered by braiding or the like, or the above-mentioned fiber strips colored can be used as appropriate, and these fiber strips (
4) A pitch of 1 to 3a+ is effective for the spiral winding.

After wrapping the fiber strips (4) that are not impregnated with synthetic resin and cellophane tape (5) on the surfaces of Gripregs (1) and (2) as described above, they are placed in a kiln to be fired and hardened.
After curing, the formed tube (6) is pulled out through the mandrel (3) 1
! (Figure 1(e)), then cellophane tape (5
), then remove the fiber strips (4), and then apply the cellophane tape (5) wrapping to a smooth surface, such as Scotch blast buffing, Scotch sander buffing, etc., and finally remove the surface. Paint and complete (
Figure 1(f)).

Next, an experimental example of the method of the present invention will be explained.

(A): Resin-impregnated lid 35%, carbon fiber amount x 25i/n/
A tubular body is formed by winding two unidirectionally aligned sheets of Gripreg in a spiral shape with a non-resin-impregnated carbon fiber yarn with a pitch of 2.5 wm. ,03): Same structure as (A),
The amount of resin impregnated in the prepreg is 40X.In the above case, the resin content of the prepreg and yarn before and after molding is the same as that of Rokko.

Table 1 As shown above, the tubular body after molding has a resin content of 30% or more, and there is no decrease in strength due to the decrease in resin, and since the same resin is integrally molded, a light and strong tubular body is manufactured. You can.

(Effects of the Invention) The molding method of the present invention involves continuously rolling a non-resin-impregnated fiber strip from one end to the other end on a grippreg of high-strength, high-elastic fibers wound around a mandrel, slightly prior to winding with cellophane tape. The tape is wound spirally, a cellophane tape is wrapped on top of the tape, and after baking and hardening, only the cellophane tape is peeled off, leaving the fibers behind.A conventional mandrel is used to wind the cellophane tape. It is possible to form a fishing rod that can prevent the mutual peeling of laminated sheets with the same number of steps as the cross-molding method.

Furthermore, since the fiber strips are wound slightly ahead of the cellophane tape winding, the spiral winding of the fiber strips is firmly fixed with the cellophane tape, and the pitch of the fiber strips is not shifted, making it possible to wind the fiber strips neatly at regular intervals. Also, when yarn prepreg with a resin content of 20% and yarn not impregnated with resin are rolled under the same conditions and compared in terms of how they spread, the yarn prepreg has a thickness of 0°3 to 0.8 m.
The width of the fibers is 1.5 to 2.0 m, whereas the width of the fibers without resin impregnation is 1.5 to 2.0 m.

For this reason, it is possible to mold a highly uniform, thin-walled, high-strength tubular body.

In addition, since fibers that are not impregnated with resin are used, the resin transfers smoothly from the prepreg and penetrates easily, and the amount of resin in the tubular body can be fixed by simply controlling the amount of resin in the prepreg. I can do it.

[Brief explanation of drawings]

Figures 1(a) to 1(f) are perspective views showing the manufacturing process, Figure 2 is an enlarged sectional view taken along line (2)-(2) in Figure 1(f), and Figure 3. is an enlarged sectional view taken along line (3)-(3) in FIG. In the figure, (1), (2) Niblib leg (3) Knee drel (4): Fibrous strip (5): Cellophane tape Patent applicant Koryu Olimbic Procedures Newo Signed 1 Official Book September S, 1982 1 , Indication of the case 1982 Patent Application No. 136799 28 Name of the invention Method for forming a fishing rod 3 Person making the amendment Relationship to the case Patent applicant Name Olimbic Co., Ltd. 4, Agent address Tokyo 5-14-7 Hakusan, Bunkyo-ku, or]

Claims (1)

[Claims] A prepreg made of high-strength, high-elastic fibers impregnated with a synthetic resin is wound around a mandrel, and then a fiber strip not impregnated with a synthetic resin is passed from one end to the other end slightly before winding with cellophane tape to tighten the wrapped prepreg. A fishing rod characterized in that the rod is continuously wound in a spiral shape, and a cellophane tape is wound thereon in a spiral manner, and after baking and hardening, the cellophane tape is peeled off to leave fiber stripes on the surface of the formed rod tube. molding method.