METHOD OF PRODUCING A MOLDED COMMUTATOR

摘要

A flanged cylindrical body formed by suitable means is disposed in a cavity die assembly and then a plurality of commutator bar dividing grooves and commutator riser dividing grooves are formed in the flanged cylindrical body rectilinarly by a suitable stamping operation, without resorting to mechanical cutting at all, while taking the flow balance of the material into consideration, thereby to form a shrink ring for the commutator. Thereafter, a molding material is charged into the thus formed shrink ring for the commutator and the material connecting the commutator bars and commutator rises is removed, whereby a molded commutator is produced.