Patent ID: 9592652
Date: 2017-03-14
CPC Classifications: B29C,B29K,B29L,B32B,Y10T

Claim:
1. A co-injection molding apparatus comprising a mold defining a mold cavity, the molding apparatus comprising: a nozzle assembly configured to inject a first polymeric material into a mold cavity configured to form an interior layer of a resulting multi-layer article and to inject a second polymeric material into the mold cavity to form an inner layer and an outer layer of the resulting multi-layer article; and a processor programmed to execute instructions to position a flow of the first polymeric material in a heat sealable zone of the resulting multi-layer article to avoid a failure in the resulting multi-layer article when the heat sealable zone melts during a heat sealing operation by co-injecting the first polymeric material into the mold cavity along a flow line offset from a zero-velocity gradient of a combined flow of the first and second polymeric materials, and wherein the processor is further programmed to execute instructions to cause the first polymeric material to fold over in the heat sealable zone away from a heat seal contact surface.