| 摘要 |
<p>PROBLEM TO BE SOLVED: To simultaneously heat plural groove parts of a bottomed cylindrical work having plural groove parts on the inner peripheral surface. SOLUTION: In a coil 100 simultaneously heating the groove parts of the bottomed cylindrical work formed plural groove parts in the inner peripheral surface, three heating conductive parts 110A, 110B, 110C inserted into each groove part and two connecting conductive parts 120A, 120B connecting these heating conductive parts 110A, 110B, 110C, are provided. The heating conductive parts 110A, 110B, 110C are constituted with five pieces of loop parts 111A-115A, 111B-115B, 111C-115C mutually connected. The loop parts 111A-115A, 111B-115B, 111C-115C are faced to the positions to be heated, of the groove parts.</p> |
