METHOD AND EXTRUSION DEVICE FOR MANUFACTURE OF FACED ELEMENTS OF A CLOSED PROFILE, MAIN IMAGE OF TUBULAR BEAMS, AND FACED ELEMENT OF A CLOSED PROFILE MADE BY THIS METHOD

摘要

1. A method of manufacturing tubular beams having an outer contour of their cross section in the form of a polygon, from a material in the form of a composition containing at least filling material and at least one binder, the filling material containing particles and / or fibers of plant origin, in particular, crushed wood material from waste wood in the form of shavings, pieces and wood chips, at least one binder contains a thermosetting resin, and the method extrudes continuously using the screw method of the prepared composite material using a screw extruder equipped with a forming channel (6) and a rotary screw shaft (2) located in this channel, the method comprising the following successive processing steps, in which the loading phase is carried out in the zone (A) loading the screw extruder; a compaction and molding phase of said composite material in which said composition is compacted, the step being carried out in the compaction zone (B); and - the phase of the heat treatment, which is carried out in the zone (C) of the heat treatment and temperature exposure of the screw extruder, said thermosetting resin in the composite material contains from 2 to 15% absolutely dry weight of the resin relative to the weight of absolutely dry filling material, and the composite material is compacted to a predetermined density and molded to the desired shape and structure in said compacting zone (B), and cured and temperature-cured in said zone (C) I evap