| 摘要 |
PROBLEM TO BE SOLVED: To make a small size, heat resistive and low cost product realizable by using an epoxy resin contg. an org. filler specified wt.% as specified casting resin and specified resin contg. an inorg. filler specified wt.% as a coil bobbin. SOLUTION: Inner magnetic cores 1-1, 1-2, sec. bobbin 2, coil 3, prim. bobbin 4, coil 5, and case 6 are assembled, heated to dry and remove deposited water, it is set in vacuum and a liq. epoxy casting resin compsn. 7 contg. an inorg. filler 39-50 wt.% and having a thermal deforming temp. of 130 deg.C or more is injected. The bobbins 2, 4 use a heat resistive polymer material having a thermal deforming temp. of 130 deg.C or more such as polyphenylene sulfide resin, polyether sulfone resin, polyether imide resin, polyether ether ketone resin, or liq. crystalline polymer resin, contg. an inorg. filler 25-75 wt.%. |
