초록 ▼

A frame for a game racquet such as a tennis racquet is formed by winding a filament over a mandrel to form a tube, wetting the filament with resin before or after winding, forming the wound tube into a preform, inserting the preform into a mold, and molding and curing the preform to form a rigid rac

A frame for a game racquet such as a tennis racquet is formed by winding a filament over a mandrel to form a tube, wetting the filament with resin before or after winding, forming the wound tube into a preform, inserting the preform into a mold, and molding and curing the preform to form a rigid racquet frame.

대표청구항 ▼

1. An improve game racquet of a composite material comprising a frame, a triangular throat portion and a plurality of reinforcing pieces; wherein said frame is made of a tubular member of a predetermined length by a filament winding method, with said tubular member having the shape of a game racquet

1. An improve game racquet of a composite material comprising a frame, a triangular throat portion and a plurality of reinforcing pieces; wherein said frame is made of a tubular member of a predetermined length by a filament winding method, with said tubular member having the shape of a game racquet frame by bending, said tubular member comprising a plurality of helically-wound filaments and resin; wherein said triangular throat portion is made of a foam material wrapped with resin prepreg tape; wherein said reinforcing pieces have a predetermined size and a predetermined angle and are made of resin prepreg tape, said reinforcing pieces being used to reinforce a plurality of structurally deficient areas of said frame and said triangular throat portion; and wherein said frame reinforced by said reinforcing pieces and said triangular throat portion reinforced by said reinforcing pieces are arranged in a molding tool in which an improved game racquet frame of a composite material is formed under heat and pressure.