Molding multi-layered articles using coinjection techniques
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United States of America Patent
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Jan 9, 2001
Issued Date -
N/A
app pub date -
Apr 29, 1999
filing date -
Apr 7, 1997
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; a valve mechanism per cavity for receiving the metered amounts of the first and second materials from the hot runner system and for sequentially supplying desired quantity of the first and second materials contiguously to each cavity.
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