PLASTICS PARISON FOR LARGE-VOLUME CONTAINERS AND PROCESS AND DEVICE FOR PRODUCING THIS PARISON

摘要

A plastics preform for an inflatable large-volume container, in particular for a container with capacity of at least 5 liters, preferably at least 10 liters, has a closure region and an inflatable hollow body region. For reducing cycle time, the preform, or at least the inflatable hollow body region thereof, is composed of a plurality of layers, where the thickness of each layer is at least 2 mm, preferably at least 3 mm, and where the thickness of the individual layers is in essence identical. Multicomponent injection moulding technology can thus be used with the rotating table technique or with the indexing plate technique to produce the various layers simultaneously in a plurality of injection units in such a way as to give, after each shot, a finished thick-walled preform. Also described are a process for producing the plastics preform and an injection moulding machine.