Fused deposition modelling

The composite was used for fused deposition modelling (FDM). FDM is a filament based rapid prototyping system (80). The application of FDM demands that the material can be made in feedstock filament form. 

N. Mostafa, H.M. Syed, S. Igor, and G. Andrew, A study of melt flow analysis of an ABS-iron composite in fused deposition modelling process, Tsinghua Science Technology, 14(Supplement l) 29-37, June 2009. 

Selective laser sintering Fused deposition modeling... 

Stratasys Inc., Minneapolis, WI, U.S.A. Fused Deposition Modelling (FDM) Thermoplastic filaments (PA, etc.)as well as wax melting the plastic in a mini extruder... 

SFF encompasses many different approaches to additive fabrication, including Stereolithography (SLA), Selective Laser Sintering (SLS), Electron Beam Melting (EBM), Laminated Object Manufacturing (LOM), Fused Deposition Modeling (FDM), and 3D Printing. 

The method is office-friendly and quiet. Fused deposition modeling is fairly fast for small parts (several cubic centimeters) or those that have tall, thin form-factors. 

Figure 2.1 PLA button deposited on polyester knitting by fused deposition modeling.

Deleersnyder, K., 2013. FDM4TP—Potential of Fused Deposition Modelling in Textiles and Plastics, http //www.centexbel.be/projects/fdm4tp-0 (accessed 01.12.14). 

FDM (fused deposition modeling) 7 (very high) Solvent free. No material trapping within small features. Good compressive strengths. Requires materials that are not thermally labile. Because of anisotropy between X Y and Z directions, layered stracture is evident Requires support material for irregular stmctures. 

Since the objects are sintered, they are porous. It may be necessary to infiltrate the part, especially metals, with another material to improve mechanical characteristics. The closest competitor to this process is probably fused deposition modeling. 

Other attempts were made to synthesize solvent-free template arrays constituted of PCL nanowires, which would be able to encapsulate active ingredients and enhance mesenchymal stem cell performances. Zein et al. created alternating ply designs of PCL using the fused deposition model (FDM) method. Their results demonstrated that FDM could be used to produce scaffolds having adequate porosity for bone tissue engineering, while having mechanical properties just equal to soft trabecular bones. 

Fused deposition modeling (FDM) is a technique that builds plastic objects by extmsion of a polymer-wax filament through a nozzle (Fig. 6.52). A modification of the technique, referred to as fused deposition of ceramics (FDC), has been developed to create ceramic components from particle-filled polymer filaments (73). Ceramic-polymer mixtures used in FDC are similar to those described earlier for injection molding of ceramics. The mixture is first extmded to form filaments with a diameter of 2 mm, after which the spooled filaments are fed into a computer-controlled extrusion head. Extrusion of the plastic mixture through a nozzle is used to form the object layer by layer. Subsequent processing steps follow those described for injection molded bodies. 

Figure 6.52 Illustration of the fused deposition modeling process.

---