Injection molding apparatus having a melt bore through the...

Details Injection molding apparatus having a melt bore through the... Injection molding apparatus having a melt bore through the...

B - Operations, Transporting

29

C

B29C 45/16 (2006.01) B29C 45/27 (2006.01)

Patent

CA 2219247

Multi-cavity injection molding apparatus for three layer molding having elongated pins for fixed pin gating or valve gating. Each elongated pin has a central melt bore extending rearwardly from its front end to a number of laterally extending bores. A low viscosity barrier material such as EVOH or nylon flows through these bores to the gate leading to the cavity. This allows coinjection with fixed pins and sprue gating in one embodiment and by valve gating in another embodiment.

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