Method for producing a composite golf club head

A method for producing a composite golf club head, comprising the steps of:

• (1) forming a metal hollow casing which has an outline of a golf club head, said metal hollow casing having a shaft connecting portion, an open top portion, a side wall, and a closed bottom portion which is integrally formed with said side wall;
• (2) disposing a bowl-shaped laminated member in said metal hollow casing, said bowl-shaped laminated member being made of a carbon fiber composite material, and being configured to correspondingly abut an internal wall face of said metal hollow casing, and having an open end adjacent to said open top portion of said metal hollow casing;
• (3) providing an expansible pocket in said bowl-shaped laminated member, said expansible pocket containing a mixture of sodium nitrite, ammonium chloride and water;
• (4) disposing a sheet of carbon fiber composite material over said open top portion of said metal hollow casing in order to close said open top portion of said metal hollow casing and said open end of said bowl-shaped laminated member;
• (5) disposing said metal hollow casing in a mold;
• (6) heating said mold to a temperature of 140.degree.-160.degree. C. in order to allow said mixture in said expansible pocket to react and produce nitrogen gas, thereby swelling said expansible pocket and forcing said bowl-shaped laminated member to attach to said metal hollow casing, and allowing said sheet of carbon fiber composite material and said bowl-shaped laminated member to harden and connect integrally to each other.