B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 44/00 (2006.01) B29C 45/00 (2006.01) B29C 47/58 (2006.01)
Patent
CA 2480025
There is described a system for producing injection-molded microcellular material, comprising: an extruder having an outlet at an outlet end thereof designed to release a non-nucleated, homogeneous, fluid, single-phase solution of a polymeric material and a blowing agent; a molding chamber having an inlet; and a nucleating pathway having a receiving end in fluid communication with the extruder outlet and a releasing end in direct fluid communication with the molding chamber inlet, wherein the system is constructed and arranged to subject the solution to a pressure drop at a rate sufficient to cause nucleation while passing the solution through the nucleating pathway into the molding chamber. The system may be used in a method of producing injection molded microcellular articles, which is also described.
Anderson Jere R.
Cha Sung W.
Laing Dana E.
Pierick David E.
Stevenson James F.
Smart & Biggar
Trexel Inc.
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