| 摘要 |
<P>PROBLEM TO BE SOLVED: To shorten the manufacturing time of a yoke and moreover to realize sure assembly working. <P>SOLUTION: The yoke 6 which has both a tubular part 21 of a tube shape with a bottom face part 23 to be a bottom and a core 27 set inside of the tubular part 21 is formed by a casting method using a mold with a gate. A gate part 6b with a shape of the gate is positioned at an outer peripheral face 6a of the yoke 6 by setting the gate part 6b at the outer peripheral face 6a of the tubular part 21. Since the gate part 6b is positioned at the outer peripheral face 6a of the yoke 6, the need of removing the gate part 6b by cutting, or polishing and the like is eliminated, and the manufacturing time of the yoke 6 can be shortened. Moreover, the gate part 6b is prevented from being an obstacle, so tat the sure assembly working can be realized. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
