Patent ID: 8449283
Filing Date: 2013-05-28
Classification: B22F,B28B,B29C,B29D,B29L,B30B,B33Y,C03B,Y02P,Y10T

Abstract:
1. A die for forming an extrusion, the die comprising a die body, a body feed section and an extrusion forming section, wherein: the die body comprises an inlet and an outlet defining an extrudate flow path through the die body; the body feed section is positioned between the inlet and outlet and comprises an arrangement of body feed channels disposed in the extrudate flow path; the extrusion forming section is positioned between the body feed section and the outlet and comprises a thin-wall forming portion fluidly coupled to at least one thick-wall forming portion comprising a first thick-wall forming portion, wherein the thin-wall forming portion comprises an array of pins extending from the body feed section towards the outlet and the first thick-wall forming portion comprising a forming area defined between the body feed section and the outlet of the die body, the forming area further extends around the thinwall forming portion between the array of pins and an interior sidewall of the die body, wherein the first thick-wall forming portion further comprises at least one baffle section disposed in the extrudate flow path within the forming area of the first thick-wall forming portion, the forming area of the first thick-wall forming portion having a radial cross sectional area greater than an interstitial area between mutually adjacent pins.