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1. (WO2010123019) METHOD FOR MANUFACTURING INDUCTORS

Pub. No.:    WO/2010/123019    International Application No.:    PCT/JP2010/057037
Publication Date: Fri Oct 29 01:59:59 CEST 2010 International Filing Date: Thu Apr 22 01:59:59 CEST 2010
IPC: H01F 41/02
H01F 41/04
Applicants: TAIYO YUDEN CO., LTD.
太陽誘電株式会社
OOKAWARA Masanori
大河原 雅則
HARASHIMA Takuya
原島 卓也
NANBA Kenji
難波 健治
TUDUKI Toru
都築 徹
Inventors: OOKAWARA Masanori
大河原 雅則
HARASHIMA Takuya
原島 卓也
NANBA Kenji
難波 健治
TUDUKI Toru
都築 徹
Title: METHOD FOR MANUFACTURING INDUCTORS
Abstract:
Provided is a method for manufacturing inductors, said method using inexpensive round wire coils and being suitable for reducing the cost of inductors. A material powder is compression-molded from above to form a primary compressed body (CB1) that has: a bottom wall provided with a high-compression-density (D3) part that can face the bottom surface of a coil section (COa) of a round wire coil (CO); a medium-compression-density (D2) peripheral wall provided so as to surround the bottom wall; and a concavity. The coil section (COa) of the round wire coil (CO) is inserted into the concavity such that the coil section (COa) is positioned above the high-compression-density (D3) part of the bottom wall, and tabs (COb) are positioned on top of the medium-compression-density (D2) peripheral wall. In addition to the aforementioned bottom wall and peripheral wall, more material powder is added and compression-molded from above to form a secondary compressed body (CB2) that has: a medium-compression-density (D2) upper wall provided on top of the peripheral wall and coil; and a medium-compression-density (D2) central part provided inside the coil section of the round wire coil. The secondary compressed body (CB2) is compression-molded from above and below, forming a final compressed body (CB3) having a final compression density (D4).