Re-extrusion in fact is multicycle extrusion of the same material. Re-extrusion of fiber reinforced composite further densifies the microstructure and improves the alignment of short discrete fibers.
Extrusion:
A lab-scale ram extruder was made to manufacture the functionally graded material. Connected to an Instron machine, the pressure and the extrusion speed can be well controlled giving more flexibility than a standard commercial extruder.
Other than single-run extrusion, re-extrusion and co-extrusion method will be used to exploit the full benefit of extrusion technique. It is expected that the FGM will be much denser in matrix and much stronger in interface between different layers.
Re-extrusion:
Re-extrusion in fact is multicycle extrusion of the same material. Re-extrusion of fiber reinforced composite further densifies the microstructure and improves the alignment of short discrete fibers.
Co-extrusion:
Co-extrusion is extrusion of multiple components at the same time.
