| 摘要 |
PROBLEM TO BE SOLVED: To provide a blow molding apparatus which uses liquid as a pressure medium; and to create a method for arrangement of a rod guide and inside a blow nozzle thereof, which can realize both a posture support function and the fluidity of liquid.SOLUTION: A cylindrical rod-shaped shaft body is inserted through a blow nozzle; a cylindrical rod guide is coaxially connected to a lower end of the shaft body; a stretching rod is inserted through the shaft body and the rod guide connected to each other; and also the stretching rod is slidably inserted through the rod guide in a peripheral contact shape. A sealing body comprises the shaft body and the rod guide; a seal step part whose diameter is contracted downward is arranged on the blow nozzle; a valve mechanism is arranged in such a manner that a feed passage of liquid in the blow nozzle can be opened and closed with the lower part of the shaft body coming into contact with, and releasing from the seal step part; and the rod guide is fitted into the a diameter-contracted part right below the seal step part in a closed state of the valve mechanism, and is released upward from the diameter-contracted part in an opened state.SELECTED DRAWING: Figure 1 |
