| 摘要 |
A multi-stage blow molding method according to which parisons are extruded one after the other at an extruding station and are accepted by a first mold which transfers them from the extruding station to a first blowing station where the parisons are converted into hollow blanks. Such blanks are removed from the first blowing station by two or more additional molds which thereupon convert the blanks into final shaped articles at discrete second blowing stations. The number of blanks which are treated by each additional mold is half or less than half the total number of parisons which are being converted into blanks at the first blowing station. This insures that the time for cooling and hardening of shaped articles at the respective second blowing stations can greatly exceed the time which is allotted for partial hardening of blanks at the first blowing station. Instead of being removed from the first blowing station by the additional molds, the blanks can be transferred to the second blowing stations by suitable gripping devices or by blowing mandrels.
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