The document provides an overview of 3D printing, including its history, terminology, processes, methods, applications, challenges and advantages/disadvantages. 3D printing involves using additive manufacturing to create 3D objects by laying down successive layers of material based on a digital model. It was developed in the 1980s and now allows for rapid prototyping of custom parts using various techniques like selective laser sintering, stereolithography and fused deposition modeling. While 3D printing enables quick prototyping and modeling, it also faces challenges regarding intellectual property and potential illegal uses.

1. SEMINAR ON-
3D PRINTING
Submitted by:
Anju Dewangan
Submitted to:
Dr. G.K. Agrawal Sir

2. Content
• Introduction
• History
• Terminology
• Additive processes
• What is 3D printing?
• General Principles
• 3D printing Methods
• Applications
• Challenges
• Advantages
• Disadvantages
• Conclusion

3. INTRODUTION
• 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 a achieved using an additive
process, where successive layers of
material are laid down in different shapes.

4. History
• The technology for printing physical 3D
object from digital data was first developed
by Charles Hull in 1984.
• He name 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

5. Terminology
• Additive manufacturing –Refers to
technologies that create object 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.

6. Additive Processes
• Extrusion deposition (Fused deposition
modeling)
• Granular materials binding
• Lamination
• Photo polymerization
• Mask-image –projection-based stereo
lithography

7. What is 3D Printing?
• For methods of applying a 2-D image on a 3-
D surface
• Additive manufacturing or 3D printing is a
process of making a three-
dimensional solid object of virtually any
shape from a digital model. 3D printing is
achieved using an additive process, where
successive layers of material are laid down
in different shapes.

8. General Principles
• Modeling
• Printing
• Finishing

9. Modeling
• Additive manufacturing takes virtual
blueprints from Computer aided
design (CAD) animation modeling
software and "slices" them into digital
cross-sections for the machine to
successively use as a guideline for printing.

10. Printing
• To perform a print, the machine reads the
design and lays down successive layers of
liquid, powder, or sheet material to build
the model from a series of cross sections.
• These layers, which correspond to the
virtual cross sections from the CAD model,
are joined together or automatically fused
to create the final shape.
• The primary advantage of this technique is

11. Finishing
• Though the printer-produced resolution is
sufficient for many applications, printing a
slightly oversized version of the desired
object in standard resolution, and then
removing material with a higher-resolution
subtractive process can achieve a higher-
resolution.

12. Different Methods
• Selective laser sintering (SLS)
• Stereo lithography
• Fused deposition modeling (FDM)
• Laminated object manufacturing

13. Selective laser sintering
(SLS)
• 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

14. STEREOLITHOGRAPHY
• Stereo
lithography is an
additive
manufacturing
process using a
vat of liquid UV-
curable
photopolymer ”re
sin” and a UV
laser to build
parts a layer at a
time.

15. STEREOLITHOGRAPHY
(Cont…)
• CAD (Computer Aided
Design) Programs help
users create STL Files
for the 3D Printers to
read.
• STL (Stereo
Lithography) file format
– a file format which
uses many little
triangles to make a 3
dimensional plot of the
objects intended
surface.

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

17. 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.

18. Applications
• Prototyping
• Modeling
• Custom parts
• Design
• Research

19. 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.

20. Advantages
• Clean process
• Wastage of material is negligible
• Good for job production
• More affordable
• 3D printing technology requires no toxic
chemical like those used in stereo
lithography printing technology

21. Disadvantages
• Process is very slow
• Components do not have enough strength
• Process is not a mass production

22. Conclusion
• Nothing communicates ideas
faster than a 3D part or model.
With 3D printer you can bring
CAD files and design ideas to
life- right from your desktop.
• Test from fit and function and as
many design variations as you
like with functional parts.

23. Thanks