| 摘要 |
PURPOSE:To obtain a true roundness easily by a method wherein when a core is molded, a channel groove and a dividing groove are formed in one body and after baking, the dividing groove is filled by a resin. CONSTITUTION:When a transformer core is molded, channel groove 11, 12 and the dividing groove 13 are formed on the same surface in one body. The depth of the dividing groove 13 must be so formed that it is larger than the thickness of the core of a required separated-type rotary transformer. After the formed body is sintered, resin 14 is fully poured into the dividing groove 13. Then, after the resin 14 is dried, the bottom of the dividing groove 14 is polished to obtain a rotary transformer core. With this constitution, the core is processed as a unitary body from the molding process, true roundness can be improved. |
