| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a shell of a golf club head which is made of a magnesium alloy by die casting and is designed to be a big size without causing a problem that the weight is increased when the volume is increased. <P>SOLUTION: The shell of the golf club head which is made of a magnesium alloy by die casting has a top portion, a face, a bottom portion, a toe portion, a heel portion and a neck. The shell is hollow. A dividing line is provided, which crosses the highest portion of the top portion, the peak portion of the toe portion, the bottom portion and the peak portion of the heel portion. The club head is divided into a face member and the shell so as to have a maximum opening 26 on the division face of the shell 20. The shell 20 is integrally molded by die casting with magnesium alloy. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
