| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing a base isolation plug which has reduced porosity without using lead for improving the damping performance of a base isolation device. SOLUTION: The columnar base isolation plug 5 inserted into the base isolation device is manufactured in processes of preforming powder and grain materials to form a massive plug raw material 15 and press-molding the massive plug raw material 15 to form the columnar base isolation plug 5. COPYRIGHT: (C)2011,JPO&INPIT |
