Abstract: A cavity pressure is sequentially changed, by relatively displacing two mold dies forming a mold cavity, to a molding presure at which a product is molded in the mold cavity, a coating pressure lower than the molding pressure at which fluidized thermosetting plastic material is injected to form a coating layer, a curing pressure between the coating pressure and molding pressure at which the coating layer is cured, and a finishing pressure between the coating pressure and curing pressure at which the coating layer thermosets. The changing of the cavity pressure to the coating pressure is initiated a predetermined time later than a termination of a drop in pressure from the molding pressure due to shrinkage of the product. The changing of the cavity pressure to the curing pressure is initiated at a peak of an increase in relative displacement between the two mold dies caused by injecting a fluidized thermosetting plastic material in the mold cavity.

Abstract: A method of coating an automobile body which is composed of plastic parts and sheet metal parts is provided. The plastic parts are formed with resin materials in which conductive materials are mixed. The plastic parts and the sheet metal parts are given the coating treatment after the two types of parts are assembled.