Seminar 3d printing presentation wollo university KIOT Abdurehman Yimam

1. Introduction
The traditional way for industrial fabrication of solid objects
consists of removing material from a given solid block until the
specified shape is obtained. It is called subtractive.
3D printing or additive manufacturing is a process of making
three dimensional solid objects from a digital file.
The creation of a 3D printed object is achieved using additive
processes. In an additive process an object is created by laying
down successive layers of material until the object is created.
Each of these layers can be seen as a thinly sliced cross-section
of the object.

2. 3D printing or additive manufacturing (AM) is a
process for making a 3D solid object from digital file.
Creation of a 3D printed object is achieved using
additive processes.
In additive process an object is created by laid down
successive layers of material until the entire object is
created.
What is 3D printing ?

3. How it works?
 A person create a 3D image of item using computer
aided design (CAD) software program
 The software slices the final model into hundreds or
thousands of horizontal layers and send to the printer.
 The printer creates the object layers by layer, resulting in
one three dimensional object.

4. Steps of 3D printing
1) Modelling
 Modelling is the first step of 3D printing.
 Manufacturing companies typically design object
models using a special type of computer software
known as a computer-aided design (CAD) package.
 Once complete, the object model is saved as a
stereolithography (STL) or an additive manufacturing
file (AMF) format.

5. 2) Printing
The second step of 3D printing involves printing, or building,
the object.
Assuming there are no errors in the STL or AMF file, the
manufacturing company can upload it to the 3D printer.
The 3D printer will use the instructions in the respective file to
dictate where and how the material is deposited.
Most 3D printers build objects by depositing layers of material
onto a bed.
The 3D printer will build the bottom layer first, after which it
will build the next-highest layer.

6. 3) Finishing
The third and final step of 3D printing is finishing. As the
name suggests, finishing involves making the final
touches on the printed object. Solvents, for example,
may be added to the printed object to eliminate any
superficial imperfections while also creating a smoother
surface finish. Alternatively, if supports were used to
hold the object during printing, they’ll have to be
removed during this third and final step.

8. Methods and technologies
 Selective laser sintering (SLS): uses a high power laser to
fuse input materials like plastic, metal, glass, etc.
 Fused deposition modeling (FDM): uses a plastic filament
or metal wire as input material to an extrusion nozzle.
 Stereo lithography (SLA):
Stereolithography (SLA or SL; also known as vat
photopolymerisation, optical fabrication, photo-
solidification, or resin printing) is a form of 3D printing
technology used for creating models, prototypes,
patterns, and production parts in a layer by layer fashion
using photochemical processes by which light causes
chemical monomers and oligomers to cross-link together
to form polymers.

9. 3D Modelling Software
Shapr3D CAD Modelling
Tinker cad
Blender
BRL-CAD
Design Spark Mechanical

10. Application of electronic 3D printing
 Rapid prototyping : is a cycle that producers or designing
teams make models for end users to test, evaluate, or debug,
and get feedback.
 Personal printing: for about thousands dollars people can to
buy the RepRap kit and put together their own personal 3D
printer, complete with any desired customizations.

11. 3d printed electronic devices

12. Reference
[1] A Review paper on 3D-Printing Aspects and Various Processes Used in the 3D-Printing Vinod G.
Gokhare Department of Production Engineering,Veermata Jijabai Technological Institute,Mumbai -
400019, India
[2] Additive Manufacturing Process (3D Printing): A Critical Review of Techniques, Applications & Future Scope
Manoj Kundu1,Assistant professor, Department of Mechanical Engineering,
DR. B.C Roy Engineering College, Durgapur, West Bengal, India,Arnab Mandal2,
B.Tech Student, Department of Mechanical Engineering,
DR. B.C Roy Engineering College, Durgapur, West Bengal, India,
[3] 3D Printing Jagmohan1 1Department of Mechanical Engineering, Ganga Institute of Technology and
Management, Kablana, Jhajjar, Haryana, India
[4] A Review paper on 3D-Printing Aspects and
Various Processes Used in the 3D-Printing Vinod.
G. GokhareDepartment of Production Engineering,eermata Jijabai Technological Institute,Mumbai -
400019, India
Dr. D. N. Raut Department of Production Engineering,Veermata Jijabai Technological Institute,Mumbai
- 400019, India
Dr. D. K. Shinde Department of Production Engineering,Veermata Jijabai Technological
Institute,Mumbai - 400019, India
[6] High-Resolution 3D Printing for Electronics
Young-Geun Park, Insik Yun, Won Gi Chung, Wonjung Park, Dong Ha Lee,
and Jang-Ung Park*