PROCESS FOR MANUFACTURING A PLASTIC-BASED PERFORATED THREE-DIMENSIONAL STRUCTURE AND DEVICE FOR IMPLEMENTING THIS PROCESS

摘要

Process for manufacturing a plastic-based perforated three-dimensional structure comprising: - a step (1) during which a flat structure (5) of a composition based on at least one thermoplastic polymer (P) chosen from amorphous and semi-crystalline polymers is continuously extruded; - a step (2) during which the flat structure (5) resulting from step (1) is fabricated in the form of a perforated three-dimensional structure; - a step (3) during which the perforated three-dimensional structure is grasped using gripping means comprising two pairs of jaws (6,6') that are applied to the two side ends of the structure on both sides of the latter, each pair having its jaws (6,6') at a given distance from one another in order to apply a controlled compression ratio to the structure; - a step (4) during which the perforated three-dimensional structure is drawn by moving the two pairs of jaws (6,6') relative to one another in a direction perpendicular to the extrusion direction and by keeping the distance between the jaws (6,6') of one and the same pair constant.