This document provides an overview of 3D printing, including definitions, general principles, methods, applications, and challenges. It defines 3D printing as using an additive process to build 3D objects by laying down successive layers of material from a digital model. The document describes common 3D printing methods like selective laser sintering, stereolithography, fused deposition modeling, and laminated object manufacturing. It also discusses applications in areas like prototyping, modeling, and research, as well as challenges regarding intellectual property rights and potential misuse of the technology.

1. A
MINAR
ON
3D
INTING
Submitted By:-
Alok Pradhan
Roll.No.-ETC/02
Electronic and Telecommunication
engineering

2. CONTENT
• WHAT IS 3D PRINTING ?
• GENERAL PRINCIPLES
• 3D PRINTING METHODS
• APPLICATIONS
• CHALLENGES
• CONCLUSION
• REFERENCES

3. WHAT IS 3D PRINTING ?
3d printing is a process of making of 3 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.

4. GENERAL PRINCIPLES
1. Modelling
2. Printing
3. Finishing

5. MODELLING
Additive manufacturing takes Virtual blueprints from computer
aided design(CAD) or animation modeling software and slices
them in to digital cross-sections for the machine to successively
use as a guideline for printing.

6. 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 its ability to create
almost any shape or geometric feature

7. 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 substractive process can
achieve a higher resolution.

8. DIFFERENT METHODS
• Selective laser sintering
• Stereolithography
• Fused deposition modelling (FDM)
• Laminated object manufacturing (LOM)

9. SELECTIVE LASER SINTERING
Selective laser sintering is an additive manufacturing technique
that uses a high power laser (ex-carbon dioxide laser) to fuse
small particles of plastic , metal, ceramic or glass powders in to a
mass that has a Desired 3d shape.

10. STEREO LITHOGRAPHY
Stereo lithography is an additive manufacturing process using a
vat of liquid uv curable “Resin” and an UV laser to build parts a
layer at a time.
CAD (computer aided design) program helps users to create STL-
files for 3D printers to read.
STL(Stereo Lithography) file format – a file format which uses
many little triangles to make a 3d plot of the objects Intended
surface.

11. FUSED DEPOSITION MODELLING
Fused deposition modelling is an additive manufacturing
technology commonly used for modelling prototyping and
production applications.

12. 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 successfully glued together and cut to shape with a knife or
laser cutter.

13. APPLICATIONS
• Prototyping
• Modelling
• Custom parts
• Design
• Research

14. CHALLENGES FACING IN 3D PRINTING
• Intellectual property rights of 3D printers users.
• Nearly anything can be printed by 3d printers and this is a
troubling prospect of criminals use 3D printers tocreate illegal
products.

15. CONCLUSION
• Nothing communicates ideas faster than a 3D part or model.
• With a 3d printer we can bring CAD files and design ideas to
life, right from our desktop.

16. THANK YOU