3D printing is an additive manufacturing process that creates a solid object by building it up layer by layer. It allows for complex designs and reduces waste compared to traditional subtractive manufacturing. Common 3D printing techniques include selective laser sintering (SLS) which uses a laser to fuse powder materials, stereolithography which uses UV lasers and liquid resin to build layers, and fused deposition modeling (FDM) which extrudes melted thermoplastics to print layers. 3D printing has applications in prototyping, modeling, and producing custom parts, and offers benefits for sustainability by generating little waste, though intellectual property and regulation of printed products require consideration.

1. 3D Printing
.

2. Printing process
Printing is a process for
reproducing text and
images, typically with
ink on paper using a
print press.

3. •GUTTENBERG’S PRINTING PRESS.
•INVENTED IN 15TH
CENTURY
•USED MOULDS MADE OF BRASS

4. Invention of first
printing machine
 FIRST PRINTING MACHINE WAS INVENTED BY
JOHANNES GENSFLEISH IN 1803.
 THIS SUPERSEDED THE COST AND SLOW
PRODUCTION.

5. Subtractive
Manufacturin
g• Creates a product by removing sections from a block of material.
• Generates waste through the excess material that is removed.
• Limited design capabilities.

6. Computerized
Numerical Control
(CNC) Machining
• A method of
Subtractive
Manufacturing that
removes sections from
a block of material by
cutting or drilling the
excess material away.

7. Additive
Manufacturing
• Creates a product
through adding
materials to the object.
• Adds material layer by
layer until printing is
finished.
• Allows for complex and
intricate designs.

8. 3D Printing
• A method of Additive Manufacturing that adds material to an
object layer by layer to create the final product.

9. 3D printing
 Imagine a near future in which a device connected
to your desktop prints a SOLID OBJECT!!!!!!
 We can have tangible goods and intangible
services delivered over the INTERNET.

10. Different methods
Selective laser
sintering (SLS)
Stereolithography
Fused deposition
modeling (FDM)
Laminated object
manufacturing

11. SLS method
Selective laser sintering
(SLS) is an additive
manufacturing technique that
uses a high power laser (for
example, a carbon dioxide
laser) to fuse small particles
of plastic, metal (direct metal
laser sintering),ceramic or
glass powders into a mass
that has a desired 3-
dimensional shape

12. STEREOLITHOGRAPH
Y
Stereolithography
is an additive
manufacturing
process using a
vat of liquid UV-
curable
photopolymer
”resin” and a UV
laser to build parts
a layer at a time.

13. STEREOLITHOGRAPH
Y
(contd).
• CAD (Computer Assisted
Design) Programs help users
create STL Files for the 3D
Printers to read.
• STL (STereoLithography) file
format – a file format which
uses many little triangles to
make a 3 dimensional plot of
the objects intended surface.

14. FDM
Fused deposition
modeling (FDM) is an
additive manufacturing
technology commonly
used for modeling,
prototyping, and
production
applications

15. Laminated object
manufacturing
Laminated object
manufacturing (LOM)
is a rapid prototyping
system developed by
Helisys Inc. In it, layers
of adhesive-coated
paper, plastic or metal
laminates are
successively glued
together and cut to
shape with a knife or
laser cutter.

16. Equipment types
Dimension 3D printer

17. Specification of uPrint
Build
Envelope
Size &
Weight
Layer
Thickness
Modeling
Material
Support
Material
Price
203 x 152
x 152
mm(8 x 6
x 6 in)
635 x 660
x 787
mm(25 x
26 x 31
in)76 kg
(168 lbs)
(with one
.254 mm
(.010 in)
ABSplus
in ivory
only.
Soluble
only
$14,900
(€11.900)

18. What is ABSplus?
ABSplus is a production-grade thermoplastic that
gives models the ability to perform just like
production parts in real-world functional testing.

19. Technique

21. The PRINTING
CYCLE
a) Preparation :
• Once you click “3D print “ from Z-print , the printer
initiates the pre build routine.
• First it warms the air inside the printer and creates
optimum operating environment.
• At the same time , it fills the ‘Build Chamber’ with 1/8th
inch layer powder ( so that finished parts rest on it).

22. The PRINTING
CYCLE
b) Printing :
• Once the pre-build is complete , the printer begins
printing the layers created in the Z-print software.
• The machine deposits 0.1mm thick layer of powder
from the ‘Hopper”.
• The ‘Print Carriage’ then moves across this layer
depositing the binder.

23. The PRINTING
CYCLE
• The binder solidifies the powder in that cross
section of the model.
• The piston below the ’Build Carriage ’ lowers the
powdered bed by 0.1mm , preparing the next
layer.
• The process repeats until the model is complete

24. The PRINTING
CYCLEc) Depowdering/Recycling :
• When finished the model, it is suspended in the powder to
cure.
• At the end of curing time , the machine then automatically
removes most of the powder around the model by
vaccum pressure.
• The loose powder is pneumatically conveyed through the
system for reuse.

25. 3D Printing : The Chemical
Process
• A platform which serves as the base of the object is submerged into
a vat of polymers.
• UV light cures and hardens these polymers with each pass over the
object.
• Once a pass is finished, the platform lowers slightly into the vat,
allowing more uncured polymers to cover the object.

26. Applications of 3D
Printing
• Prototyping
• Modeling
• Custom parts
• Design
• Research

27. 3D Printing and
Sustainability
• 3D printing with non
harmful chemicals.
• 3D printing generates
almost no waste during
manufacturing, and
does not require
lubricants.
• 3D Printing can be
used to create
replacement parts.

28. SUCCESSstories
3D printed Jaw

29. Challenges Facing 3D
Printing
• Intellectual property
rights of the 3D Printer
users.
• Nearly anything can be
printed by 3D Printers
and this is a troubling
prospect if criminals
use 3D Printers to
create illegal products.

30. In Conclusion
• 3D printing is an
expanding technology
which may soon start
an industry in which
everyone has the
possibility of being a
manufacturer.
• 3D printing has a lot of
possible benefits to
society, although the
products created must
be regulated.

31. References
http://en.wikipedia.org/wiki/3D_computer_graphics
.com
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