| 摘要 |
<p>PURPOSE: To arbitrarily change the position of a centroid, to make hardness high and wear resistance excellent and to improve the repulsive property of a golf ball by constituting a hosel, neck, heel, sole part, lower part of a toe part and weight part of cores of iron alloys and forming a face surface as a composite layer formed by packing an aluminum alloy into a fiber molding of inorg. long fibers. CONSTITUTION: The respective parts of the hosel 1a, neck 1b, heel 1c and sole 1d of the head, the lower part 1e of the toe part following the sole and the weight part if for low centroid are formed of the cores 1 consisting of the iron alloys. At least a part of the face surface 2a of the head formed by embedding the cores 1 by casting of an aluminum alloy 2 is provided with a composite layer 3 formed by packing the aluminum alloy into the fiber molding laminated with the single or of a woven fabric consisting of the inorg. long fibers including the least one among C, SiC, Al2 O3 , B and Si-Ti-C-O or plural sheet layers of such woven fabrics. The arbitrary changing of the position of the centroid at the time of designing the head is made possible by adjusting the weights of the sole part, the lower part of the toe part and the weight part for low centroid. The hardness of the face surface of the head is high, the wear resistance is good and the repulsive property of the ball at the time of impact is improved.</p> |
