3D printing technology has been exploited within SMARTFAN project in order to manufacture Smart-Fans for ELICA S.P.A. NTUA used an Industrial Markforged X7 3D printer, part of the SMARTFAN’s Pilot Line. This printer utilizes dual printer heads to print both composite, non-composite materials, reinforced or not with carbon fibres using a variety of filaments. Using the dual heads, the printer can produce complex lightweight items, while laser inspection scans parts mid-print to ensure dimensional accuracy for the most critical tolerances. Eiger Slicer, which is compatible with Markforged X7 3D printer, was used for the creation of .mfp file.

A polyamide-based thermoplastic filament has been used, reinforced with chopped carbon fibres and flame – retardant additives, in order to fulfil the requirements of ELICA S.P.A., regarding the flame-retardant properties of the fans that are intended to be used in domestic applications.

NTUA used designs by ELICA for the Smart-Fans and printed 5 prototypes. Also, 20 SDT plates were printed for ELICA to carry out various flammability measurements:

GWIT: Glow-wire Ignition Temperature

GWFI: Glow Wire Flammability Index

NFT: Needle-Flame Test

BPT: Ball Pressure Test