| 摘要 |
An accommodating base material and an attracting base material are coaxially arranged, and are resin-insert-molded, thereby forming a bobbin base material. Next, inner peripheries of the accommodating base material, attracting base material and bobbin base material are cut, so that the accommodating base material, attracting base material and bobbin base material have same inner diameters. As a result of the cut-forming process, an accommodating member, an attracting member and a bobbin are formed. After insert-molding, the accommodating base material, attracting base material and bobbin base material are cut to have the same inner diameters. Thus, the accommodating member and the attracting member are accurately coaxially formed.
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