Abstract: The present invention discloses an assembly and process for creating a co-extruded pipe which includes the steps of extruding a first elongated component exhibiting an open interior. Additional process steps include co-extruding at least one, and typically a pair, of additional elongated components each having an arcuate or lobe cross sectional shape or profile. The additional components are bonded to exterior locations of the first component to establish a pair of additional open interiors between the components and prior to cooling and hardening.

Abstract: A system and process for forming an impact absorbing vehicle headliner extrusion including feeding a viscous polymeric material to an extrusion chamber, introducing a vacuum into an interior of the chamber, progressively forming the material into an extruded shape by subsequently passed through a series of sizer dies positioned at communicating interior locations along the chamber, and drawing an extruded profile out of the chamber prior to bending and forming into an overall closed profile. Pluralities of structural supporting ribs are formed within an open interior of the extruded profile. The chamber is separated into a front vacuum tank incorporating a first plurality of sizer dies and an interconnecting rear vacuum tank incorporating a second plurality of sizer dies for assisting in the formation of the ribs within a hollow interior profile associated with the extruded article.