| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding apparatus capable of obtaining resin moldings possessing concave portions on surfaces thereof without forming weld marks, and to provide an injection molding method using the same.SOLUTION: An injection molding apparatus 11 includes a mold 13 for forming a cavity 21 of a shape skirting the contour of a resin molding 1 excluding the concave portion 3 thereof, a convex portion forming component 24 for forming, as a convex portion configured within the cavity 21 and skirting the contour of the concave portion 3, a convex portion constituted as an entity separate from the mold 13 and made of a material with a relative magnetic permeability higher than that of the mold 13, and induction heating means 25 for heating the convex portion forming component 24. In the injection molding method, the convex portion forming component 24 is heated, at the time of the injection of a molten resin by the injection molding apparatus 11, within a temperature range equal to or higher than the softening temperature of the resin forming the resin molding 1 and lower than the pyrolysis temperature thereof. |
