INJECTION BLOW MOLDING DEVICE

PURPOSE:To enable a reliable actuation free from malactuation, by a method wherein a flange part of a bushing provided slidably on a core die is pressed against an actuation groove according to mold clamping, an air blow-off outlet of a core is clogged with the bushing at the time of molding of parison and the same is released at the time of blow molding. CONSTITUTION:At the time of molding of parison, an air blow-off outlet 28 of a core 21 is closed with a slide bushing 24 of a core die 3 in accordance with mold clamping of a cavity die 1 for the molding of the parison. Then after the core die 3 is turned to a blow molding cavity die 2, the slide bushing 24 is actuated by mold clamping force and the air blow-off outlet 28 is released in accordance with the mold clamping of the blow molding cavity die 2. Since the air blow-off outlet 28 is opened or closed in alignment with a mold clamping actuation of the dies 1, 2 like this, reliable actuation free from malactuation becomes possible and inferior molding at the time of blow molding can be reduced.