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Introduction of 3D Printing
Slide prepared by : Parker Leung
Tools to ‘create’ physical objects from a virtual 3D model
Additive manufacturing process, widely uses in design and prototyping
What is 3D Printer?
‘Add’ small materials together to form objects
Can produces difficult shapes Less scraps after manufacturing
Additive manufacturing
‘Layer by Layer’
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)
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)
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.
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.
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.
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.
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
Single vs Multiple hot ends
Design with less overhang and bridges ( < 45 degree)
FDM Printing technique (1)
Use ‘support’ structures if necessary
FDM Printing technique (2)
A ‘ horizontal’ base – use less supports
FDM Printing technique (3)
From design to fabricate directly
Build on demand
Make Revolution / 3rd Industrial Revolution
Why we need 3D Printing?
Manufacturing / Building
Bio Medical
Food
Wearable / Jewellery
DIY Design / Makers
Usage of 3D printing
3D Printed Vehicle
FDM Print with “Conductive Plastic Filament”
Consist of graphite
Print electronic circuit directlyinside the structure
In future, PCBs (2D circuit) may replaced by 3D circuit
3D Printed Electronics
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?
Autodesk 123D Catch(http://www.123dapp.com/catch)
Skanect
Structure.io (with iPad)
DIY David 3D scanner
Different 3D scanning tools
