Method and apparatus for coinjecting two thermoplastic...

Details Method and apparatus for coinjecting two thermoplastic... Method and apparatus for coinjecting two thermoplastic...

B - Operations, Transporting

29

C

18/646, 18/682

B29C 45/16 (2006.01)

Patent

CA 1212805

ABSTRACT Hot runner injection molding apparatus for coinjecting two thermoplastic materials sequentially through separate channels to form at least a two-layer sandwich material is provided. There is a valve means for instantaneously switching the flow of thermoplastic material from one channel to the other channel, the valve means preferably comprising a shuttle ball member.

429583

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