JPH0320336B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a method for manufacturing tubular bodies such as fishing rods and golf shafts. [Prior Art] Conventionally, in tubular bodies such as fishing rods, there has been no particular use for tubular bodies in which a monofilament of amorphous alloy is interposed between the inner and outer layers of a tubular shape formed by winding a prepreg sheet in a spiral or twill shape. It is known from the publication No. 61-41532. Furthermore, a structure in which a tubular alloy layer made of a thin plate of amorphous alloy is bonded to a tubular reinforced resin layer made of high-strength fibers such as carbon fiber and synthetic resin is known from Japanese Utility Model Application No. 57-189369. ing. [Problems to be solved by the invention] However, when forming these tubular bodies, a tubular layer formed by winding a prepreg sheet, a tubular layer made of carbon fiber etc. and synthetic resin, or an amorphous alloy core is used. However, conventionally, a single strip of amorphous amorphous is used, so it has to be rolled several times to strengthen it, and it is easy to move up and down and left and right, making it difficult to work and time-consuming. There are problems in production, such as the winding process, and problems in that the winding tends to be uneven, which tends to cause variations in quality. The present invention was developed as a result of various studies in view of the above problems.
By weaving carbon fibers, glass fibers, etc. into band-shaped amorphous long fibers, and winding a composite reinforced fiber tape around a tube formed by winding a prepreg sheet to form a reinforcing fiber layer, The object of the present invention is to provide a method for manufacturing a tubular body, which improves the workability of this type of tubular body and enables molding of a tubular body with stable quality. [Means for solving the problem] That is, the present invention arranges strip-shaped amorphous long fibers and carbon fibers in parallel in the longitudinal direction, weaves glass fibers, carbon fibers, or aramid fibers in the transverse direction, and epoxy or unsaturated polyester. The reinforced fiber tape formed by impregnation is wound in a spiral or twill pattern continuously on the inner or outer periphery or inner and outer periphery of a tube formed by winding a prepreg sheet, or between each layer thereof, using a conventional method. The above problems were solved by molding to form a reinforcing fiber layer. [Example] Hereinafter, an example of the manufacturing method of the present invention will be described in detail based on the drawings. In Figs. 1 to 8, 1 is a reinforcing fiber tape;
As shown in the figure, band-shaped amorphous long fibers 2...
and carbon fibers 3 are alternately arranged in parallel as warp threads, and glass fibers, carbon fibers, or aramid fibers 4 are woven into this as weft threads in a knitted pattern, and this is impregnated with epoxy or unsaturated polyester to form a material with a width of 2 to 15 mm. It is formed to a certain degree. 5 is a tubular body. The tubular body 5 is formed by winding a glass cloth impregnated with a synthetic resin, usually called a prepreg sheet. The synthetic resin of this prepreg sheet is thermosetting resin,
For example, a phenolic resin is used, and when it is wound around a core bar (not shown), it is still in an uncured or semi-cured state. Thus, in the method of the present invention, the reinforcing fiber tape 1 is placed between the inner periphery, the outer periphery, or the inner and outer periphery of the tubular body 5 formed by winding the prepreg sheet, or between each layer 5', 5'' as shown in FIG. As shown in Fig. 8, they are connected and wound in a spiral or twill pattern, and formed by a conventional method to form a reinforcing fiber layer 6 to form a predetermined tubular body. To form the reinforcing fiber layer 6 on the inner periphery of the tubular body 5, as shown in FIG.
After winding continuously in a spiral or twill pattern,
The above-mentioned prepreg sheet is wound, and then cellophane tape is wrapped around the outer circumference of the winding to bind it tightly, and then passed through a hot-air heating furnace and heated by hot air to harden the synthetic resin infiltrated into the above-mentioned prepreg sheet. After molding, the core metal 7 is extracted, the cellophane tape is peeled off, and finishing is performed to obtain a product. Furthermore, as shown in FIG.
In order to form a prepreg sheet, the prepreg sheet is wound around a core metal, and then the reinforcing fiber tape 1 is wound, and then a predetermined product is formed by the above-mentioned conventional method. Furthermore, as shown in FIG. 4, each layer 5', 5'' of the tubular body 5...
In order to form the reinforcing fiber layer 6 between them, a prepreg sheet is wound around a core bar, a reinforcing fiber tape 1 is wound around the reinforcing fiber tape 1, a prepreg sheet is then wound around the outer periphery of the reinforcing fiber tape 1, and the prepreg sheet is formed by a conventional method. Next, the results of bending strength tests on test pieces produced by the conventional method and the method of the present invention will be described. (1) Test method Test piece A manufactured by the conventional method and test piece B manufactured by the method of the present invention were placed in a cantilever support structure as shown in Figure 9, and a load W of 750 g was applied to the tip of a 1000 mm span. The applied deflection amount a was measured. (2) Test results

[Table] Test piece A (conventional example): A strip-shaped amorphous long fiber (width = 0.38 mm, thickness = 15μ) was spirally wound around a 4-layer carbon tube with a pitch width of 4 mm and a tension of 500 g. thing. Test piece B (example of the present invention): Band-shaped amorphous long fibers (width = 0.38 mm, thickness = 15 μm) and carbon fibers were arranged alternately in the vertical direction, and glass fibers were woven in a knitted pattern in the horizontal direction. A fiber tape spirally wound around a 4-layer carbon tube under 500g of tension. The weight of the strip-shaped amorphous long fibers was the same for both test pieces (A) and (B), and the conditions for both test pieces were the same. As is clear from Table 1 above, test piece B was able to further increase the torsional strength, crushing strength, and bending strength. The physical properties of various fibers are shown below.

〔Effect of the invention〕

As explained above, according to the method of manufacturing tubular bodies such as fishing rods and golf shafts according to the present invention, carbon fibers and glass fibers are wrapped around a plurality of long amorphous amorphous fibers, compared to the conventional method of winding a single amorphous amorphous aluminium. By winding the woven reinforcing fiber tape 1 around the tube body 5, it is possible to wrap a plurality of strip-shaped amorphous amorphous fibers at once, thereby reducing the working time. Carbon fibers 3 are arranged in parallel as warp threads, and glass fibers, carbon fibers, or aramid fibers 4 are woven into the weft threads in a knitted manner, so that the adhesion between the tube body 5 or each of its layers 5' and 5'' is better than that of a single strip of amorphous amorphous. The effect is enhanced, and the peeling phenomenon between each layer 5' and 5'' does not occur.
A stable tubular body with no variation in quality can be manufactured, and a reinforcing fiber layer 6 is provided between each layer 5', 5'' of the tubular body 5.
It has the advantage that it can be easily formed.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a reinforcing fiber tape applied to the method of manufacturing tubular objects such as fishing rods and golf shafts according to the present invention, and FIGS. 2, 3, and 4 show tubular objects manufactured by the same manufacturing method. Each cross-sectional view of the body, FIG. 5 is a longitudinal side view of the tubular body shown in FIG. Fig. 8 is a side view showing the reinforcing fiber tape wound in a spiral or twill pattern around the outer periphery of a tube formed by winding a prepreg sheet, and Fig. 9 is a side view showing the conventional method and the method of the present invention. FIG. 3 is a diagram showing a method for testing the bending strength of each manufactured test piece. 1... Reinforced fiber tape, 2... Band-shaped amorphous long fiber, 3... Carbon fiber, 4... Glass,
Carbon, aramid fiber, 5... tube formed by winding a prepreg sheet, 5', 5''... each layer of the tube, 6... reinforcing fiber layer.

Claims (1)

[Claims] 1 A reinforced fiber tape formed by arranging strip-shaped amorphous long fibers and carbon fibers in the vertical direction, weaving glass fibers, carbon fibers, or aramid fibers in the horizontal direction, and impregnating them with epoxy or unsaturated polyester is wound around a prepreg sheet. The reinforcing fiber layer is formed by continuously winding the inner circumference, outer circumference, or inner and outer circumference of the tubular body formed by spinning, or between each layer thereof in a spiral or twill shape, and forming the reinforcing fiber layer by a conventional method. A method for manufacturing tubular bodies such as fishing rods and golf shafts.