| 摘要 |
A hollow, fiber reinforced composite product having a substantially continuous outer surface and a minimum of discontinuities in the fiber reinforcement material and method for manufacturing the product. The product is manufactured by inserting a tubular bladder inside a length of composite material in tubular form so that the bladder ends extend out the corresponding ends of the composite material. An opening is formed in the side of the composite material at a location spaced apart from one of the ends thereof. Both ends of the bladder are passed through the side opening from the inside thereof. A hollow preform is formed by overlapping the ends of the composite material so that the ends of the fiber reinforcement in the composite material overlap. One of the ends of said bladder is sealed and the preform is placed into a mold. The preform is molded into the desired hollow continuous annular shape by curing the preform within said mold while inflating the bladder through its nonsealed end.
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