PURPOSE: To increase crack-resistance and cooling efficiency, by providing an air duct mold and a separatable separator between coils, providing a fiber- reinforced layer on these surfaces, molding the whole, and taking out the mold.
CONSTITUTION: An air duct mold 6 is provided between coils 1, 2. A separatable separator 8 is provided at a gap 7. A fiber-reinforced layer 9 is provided on the surfaces of separator 8 and mold 6. All is molded. The mold 6 is taken out after hardening. The reinforcement after molding fiber-reinforced layer 3, 4 of coils, an air duct 6', the exterior layer 9 of separator 8, and a fiber-reinforced layer 5 of the coil 2 prevents the coils from cracking in molding resin 13. The separator 8 prevents both coils from cracking in molding resin 13'. The air duct 6' and a partial separator 8 increase the cooling efficiency.
HIRAKAWA KOUICHI
AKAO MASATAKE
TERADA SETSUO
| JPS5511340A | 1980-01-26 |