Coinjection molding of multi-layered articles

Details Coinjection molding of multi-layered articles Coinjection molding of multi-layered articles

1999-05-05

2000-10-10

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

2643288, 425562, 425570, 425572, 425573, B29C 4516

Patent

active

061295361

ABSTRACT:
A multi-cavity coinjection mold having a relatively large plurality of cavities for simultaneously molding a relatively large plurality of multi-layered articles including a) a plurality of cavity groups each defining a relatively small plurality of said cavities, a single balanced hot runner for supplying said relatively small plurality of cavities with contiguous different plastics materials, and a valve for sequentially supplying desired contiguous quantities of the plastics materials from plastics material sources, common to all of said groups, to the balanced hot runner; and b) a hot runner manifold system connected to the plastic material sources to supply the plastic materials to all of the valves; and related methods.

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patent: 5971735 (1999-10-01), Beck et al.

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