JPS6159222B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a ring-shaped fiber-reinforced plastic product having a T-shaped cross section.

Conventionally, as shown in Fig. 1, a ring consisting of a cylindrical part 1 and a disc part 2 reinforced in the radial direction with respect to the cylindrical part was manufactured by inserting fibers vertically and horizontally as shown in Fig. 2. A method of manufacturing by laminating a disk portion 2a made of a woven fabric perpendicular to the woven fabric impregnated with epoxy resin, polyester resin, etc. in a ring mold, heating and pressurizing it in an autoclave or press, or as shown in Fig. 3. A disk portion 2 in which the fibers are aligned in one direction and impregnated with resin, and then heated and dried to make the resin semi-hardened.
A manufacturing method is used in which B is laminated into a ring mold and heated and pressurized in the same manner as the above method.

In the manufacturing method described above, as shown in FIG. In order to ensure the strength and rigidity of the plate portion 2, it is necessary to increase its wall thickness, so it has been difficult to effectively manufacture an ultra-lightweight, high-strength, and high-rigidity ring.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it is possible to effectively make the fiber threads continuous in the circumferential direction of the ring disc part, and to use the minimum necessary fiber threads while still being lightweight and effective. The object of the present invention is to provide a method for manufacturing fiber-reinforced plastic products that produces rings with high strength and high rigidity.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 shows the process of helically winding (diagonally winding) fiber yarn 3 impregnated with resin 6 onto a disc mandrel 8 by the filament winding method. is pulled out from the bobbin 4, and this fiber thread 3 is impregnated with thermosetting resin 6 such as epoxy resin in the resin tank 5, and the amount of resin adhesion, tension, etc. are controlled to be suitable for adjusting the fiber content and expelling air bubbles. At the same time, helical winding is performed on the surface of the disc mandrel 8 through the hole 7 of the traverser to form a lamination of the required thickness. Next, two disk mandrels 8 on which the fiber yarns 3 are laminated are arranged with a predetermined gap in between as shown in FIG. 5, and the fiber yarns 3 impregnated with the same resin as shown in FIG. Wrap in the hoop direction. After that, the fiber yarns 3 are laminated into the gap, and subsequently, as shown in FIG. 6, the fiber yarns 3 are laminated in the hoop direction and the helical direction from above the fiber yarns 3 previously laminated on the outer peripheral portion of the disk mandrel 8. As the final step, the fiber yarn, that is, the composition laminated on the disk mandrel 8 is removed from the filament winding device,
As shown in FIG. 7, it is placed in a mold 9 and pressurized.
By heating and curing, a ring with a T-shaped cross section can be manufactured. Note that 10 is a heating press machine. Figure 8 shows a completed ring-shaped fiber-reinforced plastic product.

In addition, although the case where the ring is circular has been described in the embodiment, by using a mandrel having a square, triangular or other shape, rings of various shapes can be manufactured.

As described above, according to the present invention, fiber threads can be continuously arranged in the circumferential direction of the ring disc portion, so it is possible to design a tie ring with a minimum number of fiber threads, and it is ultra-lightweight and high-quality. We can manufacture rings with high strength and high rigidity. In addition, it has the effect of fully demonstrating the advantages common to the filament winding method, such as uniformity of fiber tension, control of fiber content, and economy due to automation.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a ring with a T-shaped cross section, and FIGS. 2 and 3 are partially cutaway perspective views of a conventional T-shaped ring formed by lamination and molding of woven fabric.
Figures 4 to 8 show the manufacturing method according to the present invention. Figure 4 is a perspective view of the process of laminating fiber yarns on a disc mandrel, and Figure 5 is a perspective view of the process of laminating fiber yarns between mandrels in the hoop direction. Fig. 6 is a cross-sectional view of the fiber yarn laminated on the outer periphery of a disk mandrel, Fig. 7 is a cross-sectional view of the composition being pressurized and heat-cured using a mold, and Fig. 8 The figure is a cross-sectional view of the completed ring. 1... Cylindrical part, 2... Disc part, 3... Fiber thread,
4... Bobbin, 6... Resin, 7... Traverser hole, 8... Disc mandrel, 9... Molding die, 1
0... Heating press machine. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A method for manufacturing a ring-shaped fiber-reinforced plastic product having a T-shaped cross-section, in which resin-impregnated fiber threads are laminated in a helical direction onto two discs using a filament winding device, and then both discs are laminated in a helical direction. are arranged with a gap between them, the fiber yarn is wound in the hoop direction in this gap, and then laminated on the outer periphery of the disk, these compositions are removed from the filament winding device, and finally the composition is A method for manufacturing fiber-reinforced plastic products characterized by heating and curing the product while pressurizing it with a mold.