| 摘要 |
PURPOSE:To uniformize moldings having non-uniform thickness and obtain a high dimensional stability by providing a parision sucker which can freely come in and out of the cavity. CONSTITUTION:When a parision 3 is injected, a parision sucker 4 is projected into the cavity, the parision 3 is attracted by a vacuum cap 4a, and the parision sucker 4 is retracted into a recession 2a as molds 1 and 1' are started closing. While the parision 3 is uniformly stretched, it is attracted into the recession 2a, and at a time when the sucker 4 is completely housed in the mold 1, air is blown into the parision. |
