| 摘要 |
PROBLEM TO BE SOLVED: To provide a blow-molding apparatus yielding a high production efficiency without requiring the exchange of lower pinch plates.SOLUTION: In a blow-molding apparatus including not only a lower pinch plate 20 fitted underneath a blow-molding mold 10 for nipping a parison 8 but also expander pins 30, multiple expander pins 30 are provided, each formed in the shape of a thin plate, and configured to be mobile virtually perpendicularly to the downward streaming direction of the parison 8. The lower pinch plate 20 is formed as multiple divided portions fitted in a state of being mobile toward and away from one another, whereas expander pin holes 24 and 25 for storing the respective expander pins 30 identical in number to the expander pins 30 are formed along the neighboring planes 27 thereof. The dimension of each of the expander pin holes 24 and 25 along the width direction thereof is identical to or slightly larger than the thickness of the corresponding expander pin 30, whereas the dimension of the former along the longitudinal direction thereof is a length according with the mobile range of the corresponding expander pin 30. |
