| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of a qualitative defect by preventing trouble such that the decorated surface of a sheet is collapsed and the sheet is moved, stretched or ruptured by injection pressure, the flowing pressure in a cavity or the like, in manufacturing a partially decorated molded product by setting a decoration sheet to a mold and injecting a molten resin in the mold. SOLUTION: The decoration sheet 2 is mounted on the sheet setting surface 11s of a first mold 11 to which a sprue 14 for injecting a molten resin is provided and a slide plate 15 freely advancing and retreating in a recessed place 12d is provided to the opposed surface of a second mold 12 to form an in-mold runner (r). Then, the molten resin injected from the sprue 14 is prevented from being directly injected toward the decoration sheet 2 and the flow velocity of the molten resin in the cavity in front of the decoration sheet 2 is decreased by the in-mold runner (r). Further, the molten resin of the in-mold runner (r) is compressed by the slide plate 15 before secondary pressure is applied. COPYRIGHT: (C)2004,JPO&NCIPI |
