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1479581 
Book/Book Chapter 
Thermoplastic filament extruder head for desktop additive manufacturing machines 
Neto, PI; Filho, ALL; Pereira, FDAS; Silva, JVL; Silveira, ZC 
2012 
CRC Press 
Boca Raton, FL 
Innovative developments in virtual and physical prototyping: Proceedings of the 5th international conference on advanced research in virtual and rapid prototyping 
635-638 
English 
WOS:000305445600094 
Most of the additive manufacturing (AM) equipments are patented commercial ones, but few are open-source systems (Fab@Home, Rep Rap, Candy Fab), enabling to disseminate the technology and to accelerate their development for specific needs. A machine called Fab@CTI was developed based on adaptations of Fab@Home. This paper shows the development of a printer head to enable the use of thermoplastics polymers in Fab CTI and Fab@Home machines by means of filament deposition modeling technology. Major parts of the extrusion head were built using AM machines and, in near future, the machine will be capable of building its own parts. It is also possible to adapt the extruder head to different filament diameters and different melting temperatures (room temperature to 400 degrees C). Polycaprolactone was successfully used to build porous scaffolds with minimum pore size of 200 microns. Acrylonitrile Butadiene Styrene parts were built with an average layer thickness of less than 300 microns. 
Bártolo, PJ 
9780415684187 
Proceedings of the 5th International Conference on Advanced Research in Virtual and Rapid Prototyping 
Leiria, Portugal 
September 28-October 1, 2011