| 摘要 |
<p>PURPOSE:To improve both rigidity and strength on the surface of a face part, and to restrain deformation thereof when a ball is struck, by a method wherein both a three-dimensional woven fabric which is mainly made of carbon fiber and laid on the whole of the face part and has a specified value or more in thickness, and a reinforced resin which is mainly made of another carbon fiber and forms a crust, are integrally formed. CONSTITUTION:A core part 5 is prepared by a method wherein a glass balloons (hollow, small balls) are mixed with a material, such as epoxy resin, unsaturated polyester resin or vinyl ester resin, and they are so rigidified as to have a density of 0.3 to 0.8g/cm<3>, by shaping them. After that, this core part 5 is set in a forming die, and a three-dimensional woven fabric 7 mainly made of carbon fiber is laid on the surface of the whole of a face part, which is one millimeter or more in thickness. Other parts of a crust are also integrally formed so as to become about one millimeter or more in thickness by filling material 6, such as random SMC or woven fabric SMC. In this way, a flying distance is increased and durability is improved by this golf club head.</p> |
