PURPOSE: To minimize the use of conductive fillers as required without problems of exfoliation and oxidation, by using a thermoplastic synthetic resin excellent in the strength and external apparence for the skin layer with the co-injection method and a composite member excellent in the conductivity for the core layer.
CONSTITUTION: A thermoplastic synthetic resin 3 forming a skin layer 3 from a nozzle 1 is charged in a metallic mold cavity 2. As the 2nd process of molding, in succeeding to the resin 3 charged in advance, a thermoplastic synthetic resin 5 having a conductive filler 4 is charged from the same nozzle 1 toward the inside of the resin 3 and the raw material is completely charged in a metallic mold cavity 3 for molding. The mold product after the end of charge and cooling is picked up from the metallic mold cavity 2 and completed into the composite layer construction through the finishing work.
SUZUKI TADANOBU
HAGA KAZUO
