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Imagine a world where you can make
anything you want, just by pressing
the “PRINT” button..!!
Netaji Subhash Engineering College
WHAT IS 3D PRINTING?
• 3d printing is the means of creating three
dimensional solid object from a digital file
by adding materials layer by layer.
(each of this layer can be seen as a thinly sliced
horizontal cross section of the eventual object)
Why is it called “Printing”?
• If you look closely (with a microscope) at a page of text from
your home printer, you’ll see the letters don’t just stain the
paper, they’re actually sitting slightly on top of the surface of the
• In theory, if you printed over that same page a few thousand
times, eventually the ink would build up enough layers on top of
each other to create a solid 3D model of each letter. That idea of
building a physical form out of tiny layers is how the first 3D
What kind of “ink” does it use?
• Where an inkjet printer sprays liquid ink and a laser
printer uses solid powder, a 3D printer uses neither: you
can't build a 3D model by piling up colored water or
black dust! What you can model with is- plastic!
3D printers use thermoplastics (plastics that melt when
you heat them and turn solid when you cool them back
down), and typically one called ABS (acrylonitrile
Technically, the methods are…
Selective Laser Sintering
• This technology uses a high power
laser to fuse small particles of plastic,
metal, ceramic or glass powders into
a mass that has the desired three
Fused Deposition Modeling
• The FDM technology works using a plastic filament
or metal wire which supplies material to an
extrusion nozzle which can turn the flow on and off.
The nozzle is heated to melt the material and can
be moved in both horizontal and vertical directions
by a numerically controlled mechanism, directly
controlled by a computer. The object is produced by
extruding melted material to form layers as the
material hardens immediately after extrusion from
How can it be used?
• From a pin to an airplane ; from a customized jewelry earring to a
fully functional human ear-name anything which comes in mind-
we can get it printed out of a 3d printer.
Let us see some examples where 3d printing has come to help and
Manufacturing Industry-Automobile, Aircraft and even spacecraft-all
have started using 3d printed parts as they can be more intricate and
customised and also time efficient in production.
20,000 parts are now being used for the Boeing aircrafts and they
even want to patent them!
GE 3d printed a jet engine very recently which runs at 33,000 rpm.
NASA is recently using full scale 3d printed copper rocket parts.
Welcome to the age of BioPrinting
where the machines which we have built
,are building bits and pieces of US..!!
Some of them are…
• Liver cells,kidney cells and bladder
cells have been 3d printed and have shown
signs of thriving well.
Even beating heart cells have also
been developed which are very promising.
• Imagine if you could take living cells, load them into a printer, and
squirt out a 3D tissue that could develop into a kidney or a heart.
Scientists are one step closer to that reality, now that they have
developed the first printer for embryonic human stem cells.
• Now we will need blood vessels-
which can also be printed just by
adding sugar and water!!
• Bones & Cartilage
• Prosthetics and implants
• Bionic ear
• Heart valves
• Skin graft…..and what not!!
Blind mother “sees” her “unborn” child thanks to 3d
Guess who this is with his life size 3d printed model..!!
Is it THE NEXT BIG THING?
• Well, the answer is certainly YES.!
• Like all emerging technology which means like
mobile phones and computers, most people will be
skeptical about needing one until everyone has got
one and then we‘ll wonder..how we ever managed