Patent ID: 6789304
Filing Date: 2004-09-14
Classification: A63B,B22C,Y10T

Abstract:
A method of making a golf clubhead,containing a main body and a face member, the main body including a main shell portion having a hollow and a tubular inner extension of a hosel protruding in the hollow, and at least a part of the tubular inner extension separating from the inner surface of the main shell portion, said method comprising: making a first lost form corresponding to the main shell portion; making a second lost form corresponding to the tubular inner extension; fixing the second lost form to the first lost form to make a third lost form corresponding to the main body; making a casting mold using the third lost form; casting a metallic material into the main body using the casting mold; and inserting a round bar made of a material which is the same or similar to the casting mold into a hole of the hosel and a hole of the tubular inner extension.