EXTRUDER FOR CONTINUOUSLY EXTRUDING A WALL HAVING A THREE-DIMENSIONAL CELLULAR STRUCTURE,AND A CELLULAR WALL PROVIDED THEREBY

摘要

An extruder in accordance with the invention comprises a die (1) having an opening (2) in the form of an uninterrupted section constituting a frieze of rectilinear or curved segments that meet one another, and a mask (3) driven in reciprocating sliding motion over the die (1) and including a window which overlaps a varying portion of the section (2) as the mask moves.