3D printing is an additive manufacturing process that builds up physical objects layer by layer from a 3D digital model. The document discusses the history and development of 3D printing technologies like fused deposition modeling (FDM), stereolithography (SLA), binder jetting, and selective laser sintering. It also covers common 3D printing materials, techniques, applications in fields like manufacturing, bio-medical, wearables and more. The document concludes with an overview of how 3D scanning works to capture physical objects as digital 3D models.

1. Introduction of 3D Printing
Slide prepared by : Parker Leung

2.  Tools to ‘create’ physical
objects from a virtual 3D
model
 Additive manufacturing
process, widely uses in
design and prototyping
What is 3D Printer?

3.  ‘Add’ small materials together to form objects
 Can produces difficult shapes
 Less scraps after manufacturing
Additive manufacturing

4. ‘Layer by Layer’

5.  First 3D printer invent in
1984 year, by Chuck Hull
(3D Systems Corporation)
 Mainly used in industrial
prototyping over 20+
years.
History of 3D printing (1)

6.  In 2005, because patent expired of
FDM, Dr. Adrian Bowyer of
University of Bath, founded a open
source 3D printer project called
“Rep-Rap”
 The first open source 3D printer –
“Darwin” launch on 2007
History of 3D printing (2)

7. Fused Deposition Modeling (FDM)
FDM uses a reel of plastic filament
and extruding it through a small
diameter nozzle and fused together
to form objects.

8. Stereolithography (SLA)
SLA uses a laser and a set
of mirrors to solidify the
layer of UV light curable
resin.
Since laser beam is narrow
enough, output quality is
better than FDM.

9. Binder jetting / Polymer jetting
Binder jetting uses liquid
adhesive to binding the
selected polymer powder
to form a physical object.
With colour adhesive, it
can form colour objects.

10. Selective Laser Sintering (SLS)
SLS uses a laser to melt the
selected metal / polymer
powder and form a physical
object.
This method usually uses
building metal objects.

11.  Usually print with plastic filaments, likes:
 ABS – Strong and last long, bad smell during printing
 PLA – Made from corn, bio degradable
 PVA – Water soluble, uses to print ‘supports’
 Nozzle size from 0.25mm up to 0.8mm
 Layer thickness from 0.05mm up to 0.4mm
More about FDM technology

12. Single vs Multiple hot ends

13. Mutli-color FDM

14.  Design with less overhang and bridges ( < 45 degree)
FDM Printing technique (1)

15.  Use ‘support’ structures
if necessary
FDM Printing technique (2)

16.  A ‘ horizontal’ base – use less supports
FDM Printing technique (3)

17.  From design to fabricate directly
 Build on demand
 Make Revolution / 3rd Industrial Revolution
Why we need 3D Printing?

18. Manufacturing / Building
Bio Medical
Food
Wearable / Jewellery
DIY Design / Makers
Usage of 3D printing

19. 3D Printed Vehicle

20. 3D Printed House

21.  FDM Print with “Conductive Plastic Filament”
 Consist of graphite
 Print electronic circuit directly
inside the structure
 In future, PCBs (2D circuit)
may replaced by 3D circuit
3D Printed Electronics

22. Food Printing

23. Medical uses

24. 3D Printed Wearable

25.  Scan real objects,
to get “cloud of points”
 Link up “cloud of points”
to form “faces”
 Transform into
3D modeling file
How 3D Scanning works?

26.  Autodesk 123D Catch
(http://www.123dapp.com/catch)
 Skanect
 Structure.io (with iPad)
 DIY David 3D scanner
Different 3D scanning tools

27. What is 123D Catch?

28. How to use Skanect?