| 摘要 |
PURPOSE:To obtain a coreless armature having excellent hot time size stability and excellent heat resistance by sealing an armature winding with a composite material of unsaturated polyester resin containing predetermined 3-function triazine compound and the prescribed inorganic substance. CONSTITUTION:A resin composition for sealing an armature winding is obtained by a composite material which contains 5-40wt% of unsaturated polyester resin containing 3-function triazine compound and at least 70wt% of inorganic filler. The armature winding and an armature shaft are filled in a mold heated in advance to 179 deg.C+ or -3deg, resin composition is sealed by a transfer molding under the conditions of 80kgf/cm<2> of plunger pressure and 80sec. of curing time, and a coreless armature having 3mm. of thickness in a flat shape is obtained. |
