Fabrication method of a hollow racket made of carbon fiber

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. Upon removal of the racket from the die and removal of the air blowing nozzle, a special adhesive agent is supplied through the tail hole. The tail hole is then sealed with resin and the mold is heated for a second time. After having the semi-product taken from the die, a small hole is drilled in the racket and the racket is coated. After the semi-product has been coated and dried, air inside the racket is expelled through the small hole and the small hole is sealed with resin.

Dependencies are inferred from the claim text.