PURPOSE: To obtain the degreased molded bodies with high dimensional precision with the least deformation during the degreasing step by a method wherein a binder mainly comprising organic high molecules is composed of a fugacious material exceeding specific % of which is to be thermal-cracked by holding it at least for ten hours at the temperature lower than the Curie temperature of the title magnetic powder.

CONSTITUTION: Within the magnetic powder molded body containing magnetic powder and a binder, the binder mainly comprising organic high molecules is composed of a fugacious material exceeding 70% of which is to be thermal-cracked by holding it at least for ten hours at the temperature lower than Curie temperature of the magnetic powder. For example, a mixture of 90wt.% of calcinated powder of Ni-Zn ferrite in the mean particle diameter of 0.5μm kneaded with 6wt.% of paraphine wax at the melting point of 60°C, 2.5wt.% of polyisobutylene in the mean molecular weight of about 80.000, 1.5wt.% of ethylene-acetic acid vinyl copolymer in the mean molecular weight of about 120.000 with the acetic acid vinyl content of 11wt.% is extruded into pellets by an extruding machine. Finally, the extrusion-molded bodies out of the material in the state wherein the upper sides thereof are attracted to an Sr ferrite magnet are degreased.