Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1986-09-19
1990-06-05
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
2643288, 4251331, B29C 4516
Patent
active
049312464
ABSTRACT:
A method of simultaneously effecting the initiation, flow and termination of flow of corresponding melt streams of polymer materials from a plurality co-injection nozzles of a multi-co-injection nozzle injection molding machine to form a plurality of multi-layer injection molded plastic articles. A melt stream of polymeric material for each layer is provided and feed along an equal flow path to each nozzle using a common pressure source for each stream of a given polymeric material which is to form a layer in more than one article. A valve means effects the initiation, flow and termination of the flow of material simultaneously and identically in each nozzle.
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Kudert Frederick G.
Latreille Maurice G.
McHenry Robert J.
Nahill George F.
Pfutzenreuter, III Henry
American National Can Company
Audet Paul R.
Durkin II Jeremiah F.
Woo Jay H.
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