| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a core for forming an oil discharging passage which does not require any assembly work and manufactured with molding flasks of a small number, and a manufacturing method of a bearing housing using the same. Ž<P>SOLUTION: The core 1 for forming the oil discharging passage includes end oil passage forming parts 3, 4 for respectively forming two end oil passages, and a lower oil passage forming part 5 integrated with the end oil passage forming parts 3, 4 to form a lower oil passage, and has a shape in which a core portion for forming a shaft passing hole is eliminated. The core 1 for forming the oil discharging passage has a shape in which any hollow part requiring a core during the molding is not present between the two end oil passage forming parts 3, 4, and the molding is possible only by two upper and lower molding flasks. The core 1 for forming the oil discharging passage has a side expansion part 6. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
