| 摘要 |
PCT No. PCT/EP92/01088 Sec. 371 Date Jan. 19, 1993 Sec. 102(e) Date Jan. 19, 1993 PCT Filed May 18, 1992 PCT Pub. No. WO92/20603 PCT Pub. Date Nov. 26, 1992.In order to produce as easily and as economically as possible a bobbin (1) for fibrous wound materials it is suggested that at least one bobbin flange (3) is a flat, annular disk and a frictional welding connection (5) is provided at at least one tube end face (7, 17) of the core tube (2) in the corner region (10) between the core tube (2) and the bobbin flange (3). The parts of the multiple-part bobbin (1) made of light metal are either turned parts or integral forge or extrusion parts (20) composed of a bobbin flange (3) and the core tube (2) which may be, if necessary, cut to the appropriate length so that no costly tool changes are required to produce special bobbin types or to modify the bobbin.
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