Molding multi-layered articles using coinjection techniques
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United States of America Patent
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May 7, 2002
Grant Date -
N/A
app pub date -
Apr 1, 1998
filing date -
Apr 1, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-cavity coinjection mold and method for simultaneously producing a plurality of multi-layered articles comprising: a mold structure defining a plurality of mold cavities; a first supply source for supplying metered amounts of a first molding material; a second supply source for supplying metered amounts of a second molding material; a hot runner system in communication with the first and second supply sources for conveying the metered amounts of the first and the second materials separately to a region proximate each of the cavities; the region comprising having a pin controlled passage leading to proximate cavity by way of a gate having the same cross-section as the passage, the pin scavenging material from the passage and providing cavity packing.
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