| 摘要 |
PURPOSE:To provide a manufacturing method wherein a shape of a formed piece formed by a free blow molding system can be stabilized, which can be brought near to a shape of a final product, and besides a biaxially oriented blown container which is excellent in heat resistance and thermocompression resistance can be manufactured. CONSTITUTION:In a manufacturing method for a biaxially oriented blown container, a mouth part of a preform 1 heated at an orientation temperature is held with a mouth part-holding fixture 2. Besides, a center of a bottom part of the preform is put between a drawing rod 3 inserted inside the preform and a pushing rod 4 outside the preform, and the drawing rod 3 is driven in a bottom part direction as the put state is maintained. A fluid is made to blow into the preform under a state wherein environment of the preform is not restricted to a final stage, and the preform is free-blow-molded. |
