摘要 |
<p>Apparatus for unit cavity and multi-cavity, multilayer injection molding and injection blow molding machines are provided, which, in preferred embodiments, include coinjection nozzle means, each for plural polymers, valve means for each nozzle, the valve means being adapted to move through a nozzle central channel to clear the nozzle channel of melt, a feed-block for each nozzle, polymer melt splitters, drive means for each valve means, a free floating runner system and a force compensation system to provide an effective pressure seal between the nozzles and the cavity block.</p> |