Fused Deposition Modeling (FDM)

FDM technology can go about building quick prototypes with strength and speed, at a very economical price in a range of thermoplastic materials, which makes it a very attractive option.

3D printing utilizing the extrusion of thermoplastic material is easily the most common and recognizable 3DP process. The most popular name for the process is Fused Deposition Modelling (FDM).

Fused Deposition Modeling technique in Rapid Prototyping

The process works by melting plastic filament that is deposited, via a heated extruder, a layer at a time, onto a build platform according to the 3D data supplied to the printer. Each layer hardens as it is deposited and bonds to the previous layer. The FDM/FFF processes require support structures for any applications with overhanging geometries.

The great advantage of FDM is the durable materials it uses, the stability of their mechanical properties over time, and the quality of the parts. The production-grade thermoplastic materials used in FDM are suitable for detailed functional prototypes, durable manufacturing tools and low-volume manufacturing parts.

Support structures, or lack thereof, have generally been a limitation of the entry level FFF 3D printers. However, as the systems have evolved and improved to incorporate dual extrusion heads, it has become less of an issue. Occasionally, the process can be slow for some part geometries and layer-to-layer adhesion can be a problem, resulting in parts that are not watertight.

  • Prototypes for form, fit and function testing

  • Prototypes directly constructed in production materials like ABS, Nylon

  • Low-volume production of complex end-use parts

  • Patterns for Sand casting & molds with lesser detailing

PLA                                                                    

Tensile Strength(MPa)Flexural Strength(MPa)Impact Strength(MPa)Melting Temperature°C
62.6365.024.28190 – 220

ABS                                                                    

Tensile Strength(MPa)Flexural Strength(MPa)Impact Strength(MPa)Melting Temperature°C
40.9645.4422.11220 – 260

PETG                                                                    

Tensile Strength(MPa)Flexural Strength(MPa)Impact Strength(MPa)Melting Temperature°C
49687.5230 – 250

Nylon                                                                    

Tensile Strength(MPa)Flexural Strength(MPa)Impact Strength(MPa)Melting Temperature°C
50 – 5585 – 90354220 – 260

Poly Carbonate                                                                    

Tensile Strength(MPa)Flexural Strength(MPa)Impact Strength(MPa)Melting Temperature°C
62.7100.43.41260 – 280

Wood                                                                    

Tensile Strength(MPa)Flexural Strength(MPa)Impact Strength(MPa)Melting Temperature°C
23.252.92.06NA

Flexible                                                                     

Tensile Strength(MPa)Flexural Strength(MPa)Impact Strength(MPa)Melting Temperature°C
13.85NANA190 – 220

HIPS                                                                    

Tensile Strength(MPa)Flexural Strength(MPa)Impact Strength(MPa)Melting Temperature°C
26.532.9410.89220 – 260

PVA                                                                  

Tensile Strength(MPa)Flexural Strength(MPa)Impact Strength(MPa)Melting Temperature°C

Minimum Wall thickness: 1.2 mm

Minimum details size: 2 mm (for text/ hole diameters etc)

Layer thickness: 0.1 mm – 0.3 mm

Max dimensions: 650 x 600 x 600 mm. Large parts can be created with assembling individual parts by interlocking designs or glueing together. 

Standard Accuracy: ± 0.3% (with lower limit on ± 0.3 mm).

Lead Time: Minimum 2 working days for despatch

Surface finish: visible layers with texture.

Basic: Support Removal, Sanding, Smoothing

Add on: Primer, Coating/ Painting

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2017-07-17T09:52:34+00:00 August 24th, 2016|3D Technologies|0 Comments

About the Author:

Co-founder at think3D, from product management background. Interest in tech stuff ad belief in 3D printing potential

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