| abstract |
(57) Abstract: Provided is a method for manufacturing a molded article capable of producing a molded article having a three-layer structure of a skin material layer, a foam layer, and a core layer with high productivity in one step. A fixed mold and a movable mold are fitted to a position where a primary cavity is formed while a skin material is along a mold surface of a movable mold, and a primary pressure is filled in the primary cavity by filling the primary cavity with a gas of a constant pressure. A first step of maintaining the inside of the cavity at a constant pressure, a second step of supplying a molten thermoplastic resin in which a gas is dissolved into the primary cavity from a gate provided on a fixed mold, and while maintaining a molten state inside, After solidifying the mold surface of the molten thermoplastic resin supplied into the primary cavity and the portion in contact with the skin material to form a skin layer, the movable mold is moved in the mold opening direction while reducing the gas pressure in the primary cavity. And a third step of forming a secondary cavity having a larger volume than the primary cavity. |