Magnetic float for magnetic sensor |
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| 申请号 | JP27031088 | 申请日 | 1988-10-26 | 公开(公告)号 | JPH02116719A | 公开(公告)日 | 1990-05-01 |
| 申请人 | Ishikawa Tekko Kk; | 发明人 | AISA JIYUNZOU; YAMAMOTO MITSUO; | ||||
| 摘要 | PURPOSE: To obtain a magnetic float for a magnetic sensor easily and inexpensively and to improve durability by making the powder of a magnetic substance be contained in a foamed body of synthetic resin and by magnetizing this powder of the magnetic substance. CONSTITUTION: A magnetic float 22 of a level gage 24 is prepared by making the powder 26 of a magnetic substance be contained in a foamed body 25 of synthetic resin. The powder 26 of the magnetic substance is dispersed inside the foamed body 25 and this powder 26 is magnetized in the vertical thickness direction. In the magnetic float 22 thus prepared, almost all the powder 26 of the magnetic substance is coated with the synthetic resin of the foamed body 25, except for a very small part thereof exposed on the surface, and therefore it is prevented entirely from the possibility of being affected by a liquid 32 and thus is excellent in durability. The magnetic float 22 can be manufactured easily by mixing the synthetic resin and the powder 26 of the magnetic substance, by injecting the material thus prepared into a mold and by making the synthetic resin foamed. COPYRIGHT: (C)1990,JPO&Japio |
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