Fused Deposition Modeling (FDM), or Fused Filament Fabrication (FFF), is an additive manufacturing process that belongs to the materi- al extrusion family. In FDM, an object is built by selectively depositing Order Pr int melted material in a pre-determined path layer-by-layer. The materi- als used are thermoplastic polymers and come in a filament form.
PLA and ABS are the 2 most common FDM desktop printing materi- als. Both are thermoplastics, meaning they enter a soft and moldable state when heated and then return to a solid when cooled. Via the FDM process, both are melted and then extruded through a nozzle to build up the layers that create a final part.
ABS (Acrylonitrile Butadiene Styrene) is a common thermoplastic well known in the injection molding industry. It is used for applications such as Toys, electronic casing and Industrial parts.
PLA (Polylactic Acid) is a biodegradable (under the correct conditions) thermoplastic derived from renewable resources such as corn starch or sugarcane. It is one of the most popular bioplastics, used for many applications ranging from plastic cups to medical implants.Print now →
|Tensile Strength||27 MPa||37 MPa|
|Elongation||3.5 - 50%||6%|
|Flexural Modulus||2.1 - 7.6 GPa||4 GPa|
|Density||1.0 - 1.4 g/cm3||1.3 g/cm3|
|Melting Point||N/A (amorphous)||173 °C|
|Spool Price (1Kg, 1.75mm, black)||₹ 2500||₹ 2500|
|Common Products||Industrial, Housings||Casing, Prototyping|
Warping is one of the most common defects in ABS. When the extruded material cools during solidification, its dimensions decrease. As different sections of the print cool at different rates,their dimensions also change at different speeds.
A designer should keep in mind the capabilities and limitations of the technology when fabricating a part with FDM, as this will help him achieve the best result.
|Good Strength||Excellent visual quality|
|Good temperature resistance||Easy to print with|
|More susceptible||Low impact strength|