ICT role in 21st century education and its challenges
3 d printer presentation
1.
2. 3D printing is a form of additive
manufacturing technology where a three
dimensional object is created by laying down
successive layers of material.
It is also known as Additive manufacturing.
3D printing is achieved using an additive
process, where successive layers of material
are laid down in different shapes.
3. The technology for printing physical 3D objects
from digital data was first developed by Charles
Hull in 1984.
He named the technique as Stereo lithography and
obtained a patent for the technique in 1986.
By the end of 1980s, other similar technologies
such as Fused Deposition Modeling (FDM) and
Selective Laser Sintering (SLS) were introduced.
In 1993, Massachusetts Institute of Technology
(MIT) patented another technology, named "3
Dimensional Printing techniques", which is similar
to the inkjet technology used in 2D Printers.
In 2005, Z Corp. launched a breakthrough
product, named Spectrum Z510, which was the
first high definition color 3D Printer in the market.
4. Additive manufacturing - refers to
technologies that create objects through
sequential layering.
Rapid prototyping - is a group of
techniques used to quickly fabricate a
scale model of a physical part or
assembly using three-dimensional
computer Aided Design (CAD) data.
Subtractive processes - removal of
material by methods such as cutting or
drilling.
Stereolithography was defined by Charles
W. Hull as a "system for generating
three-dimensional objects by creating a
cross-sectional pattern of the object to
be formed
5. 3D printable models may be
created with a computer aided
design package or via 3D scanner.
The manual modeling process of
preparing geometric data for 3D
computer graphics is similar to
plastic arts such as sculpting.
3D scanning is a process of
analyzing and collecting data of
real object; its shape and
appearance and builds digital,
three dimensional models.
6. A virtual design of the object
is created.
CAD (Computer Aided
Design) uses a 3D modeling
program or 3D scanner for
virtual design.
The software slices the final
model into hundreds or
thousands of horizontal
layers.
The printer creates the object
layer by layer, resulting in one
three dimensional object.
7. Several ways to realize 3D objects –
Selective Laser Sintering (SLS) : uses
a high power laser to fuse input materials like
plastic, metal, glass, etc. It scans the
powdered material layer by layer.
Fused Deposition Modelling (FDS) :
uses a plastic filament or metal wire as input
material to an extrusion nozzle. The nozzle is
heated to melt the material and can be moved
in both horizontal and vertical directions by
CAM. The material hardens immediately after
extrusion from the nozzle.
Stereolithography (SLA) :
photopolymerization is used to produce a
solid part from a liquid. This technology
employs a vat of liquid ultraviolet curable
photopolymer resin and an ultraviolet laser to
build the object’s layers one at a time. UV
Laser solidifying the pattern.
9. Automotive and aviation
industries use 3D printers to
make body parts.
2010
Urbee the first prototype car
2011 was presented. This is
the first car ever to have its
entire body printed out on a
giant 3D printer.
It has three wheels, and two
seats.
10. In food preparation, to apply items in liquid or
paste form such as cheese, icing, and chocolate.
In Jul, 2011
Led by the University of Exeter,
The University of Brunel
and application developer Delcam,
researchers in UK
have presented the world's first
11. Physicians can use 3D
printing to make hearing
aids, artificial teeth, and
bone grafts.
3D printed Jaw
12. 3D Printing technology could
revolutionize and re-shape the world.
Advances in 3D printing technology can
significantly change and improve the
way we manufacture products and
produce goods worldwide.
If the last industrial revolution brought
us mass production and the advent of
economies of scale - the digital 3D
printing revolution could bring mass
manufacturing back a full circle - to an
era of mass personalization, and a
return to individual craftsmanship.
