Abstract: A method of integrally forming a bicycle front fork formed from a compound material including the steps of preparing a mold of a length greater than the front fork; forming a curved groove at a rear end of the mold; winding a blank of a front fork shape from a compound material and placing the blank into the mold; inserting an inflatable tube into the blank from a vertical tube at an upper end thereof through a forced portion on one side and round the curved groove and then through a formed portion on the other side to have the end in the vertical tube; and forming a front fork from the blank by inflation, heating and applying pressure.

Abstract: A three-layered solid golf ball structure includes a core, an intermediate layer, and an outer shell. The intermediate layer is formed from a material compounded from a thermosetting elastomer and an amorphous alloy so as to attribute high strength and high elasticity to the golf ball. The specific weight and hardness of the golf ball can also be adjusted to achieve preferred sense of striking, a farther flying distance, and a longer useful life.

Abstract: The present invention relates to a method of fabricating a hollow recreational product, such as a racket, made of fibre or carbon fibre by providing a fibre sleeve tube mounted onto a racket filament mold and having several layers of overlapped woven boards wrapped about the entire filament mold. Several layers of woven boards of a shorter length are wrapped about the head of the filament mold. A fibre sleeve tube is disposed about the layers and the end of the head is sealed with a fibre cloth. The racket is then removed from the filament mold. An air blowing sleeve tube is placed into the opening of the tail of the embryonic mold of the racket and an air blowing nozzle is installed at the opening end of the air blowing sleeve tube. The assembly is placed into a die, air is blown into the embryonic mold and the mold is heated, so as to have the embryonic mold hardened and formed.