| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold excellent in the concentricity of a core and a main body member while holding the core in a slidable manner by ensuring the installation space of a holding cylinder. SOLUTION: In the mold constituted so as to form a cavity between a first mold and a second mold to mold a product in the cavity, the first mold is set so as to satisfy the relation of the formula (1): [(A+B)π/1.5(A+B/4)]≤n≤[(A+B)π]/1.5A [wherein A is the diameter (mm: 0.8≤A≤1) of the spherical body and B is the outer diameter (mm: 3≤B≤25) of the core] with respect to the number (n) of a large number of spherical bodies 131 arranged along the outer peripheral direction of the core 110. COPYRIGHT: (C)2007,JPO&INPIT
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