| 摘要 |
<p>After introducing gas into a cavity (113) of a clamped die to boost a pressure therein, a resin material (X) containing a foaming agent is injected. After forming a skin layer, at the same time as a start of a core-back operation for foaming the resin material (X) or after the core-back operation, gas in the cavity (113) is vacuum-suctioned to make a pressure in the cavity (113) less than the atmospheric pressure. By cooling and solidifying, an injection foam molded article is obtained. Before complete solidification, gas between the resin material (X) and an inner surface of the die (110) is reliably discharged out of the cavity (113), so that surface recesses and generation of swirl marks due to gas accumulation can be prevented.</p> |
