Method for producing a laminated article

A method for producing a laminate article by fusion-bonding integrally a skin material to a core material using a horizontal mold clamping type injection molding machine, characterized in that said method comprises the steps of:

• setting up a skin material by inserting it at a predetermined position in a cavity of a mold while keeping the mold open;
• closing the mold to a predetermined mold clamping position thereafter;
• injecting a resin melt for a core material into a space formed by the mold and the skin material so as to fill the space with the resin melt for a core material with the volume of the space formed by the mold and skin being larger than the volume of the resin melt injected;
• opening said movable mold in accordance with the progress of injection to a predetermined position after a desired period of time passes from the start of the injection;
• and
• closing the mold after the completion of the injecting operation
• wherein said method can be completed without damage to the skin material of the thus molded article at the vicinity of a gate portion of the mold.