| 摘要 |
PROBLEM TO BE SOLVED: To enable molding with a good transfer property with the fluidity of a molten resin packed in a cavity maintained by coating the wall surface of a mold which forms the cavity with an electric resistance layer in which a conductive material is dispersed in glass. SOLUTION: A molten resin R is packed into a cavity 3 from the nozzle of an injection molding machine through a sprue, a runner 5, and a gate 6. The wall surface of the cavity 3 is coated with an electric resistance layer 7 through an insulating layer 8 to be reinforced by a backing material 9. The resistance layer 7 is composed of a mixture containing at least one kind of powder of glass selected from a group consisting of borosilicate glass, silicate glass, crystallized glass, and lead glass and at least one kind of particles of noble metal selected from a group consisting of Ag, Au, Pa, and Pt or alloy containing one kind of the above noble metals. The resistance layer 7 is connected to an external power source by an electric terminal part 12. When the layer 7 generates heat by energization, the fluidity of the molten resin is maintained to obtain a molding with a good transfer property.
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