3D printing was developed in 1984 and allows digital objects to be created from 3D model data through an additive process of layering materials. The document discusses the history and mechanisms of 3D printing, including modeling an object digitally or through scanning, then slicing the model into layers to guide the printer. Common 3D printing technologies build objects through extruding thermoplastics, photopolymerization, powder binding, or sheet lamination. Applications exist in industries like engineering, healthcare, and consumer products due to advantages like customization and complexity. However, 3D printing also faces limitations such as a narrow choice of materials and size constraints.

1. 3D Printing
CHAN Choi Ching 15227243
HUI Ming Ho 15215903
NG Pui Yiu 15217787

2. Contents
○ Mind Map
○ Background and history
○ Mechanism
○ Materials
○ Development and application
○ Pros and Cons
○ Survey Results

3. Mind Map
○ https://www.mindmeister.com/582447886/3d
-printing

4. Objectives
○ Understand the mechanism of 3D Printing
and its own application
○ Analyze the public opinion towards 3D
Printing
○ Identify the pros and cons of 3D Printing

5. Background
○ 3D Printing (Additive Manufacturing)
○ Three-dimensional object from digital file(STL)
○ Either using a 3D modeling program (create
new) or a 3D scanner (existing object)
○ ‘Sliced’ into successive layers (horizontal
cross-section)

6. History
○ Developed by Chuck Hull in 1984
○ Originally known as ‘Rapid Prototyping’
○ Most common method: stereolithography
(STL)
○ Price in 2007 ~USD10000
○ First commercial 3D Printer launched in 2009

7. Mechanism
Modeling Printing Finishing

8. Modeling
○ Scanning the desired product by a 3D
scanner or create a model by using Computer
Aided Design (CAD)
○ Collect geometric data for computer to make
a digital model
○ ‘Sliced’ into layers
○ Convert the data into a readable file for 3D
printer (.slt)

9. Printing
Type Technology
Extrusion Fused deposition modeling (FDM)
Fused Filament Fabrication (FFF)
Light polymerized (Vat
Photopolymerization)
Stereolithography (SLA)
Digital Light Processing (DLP)
Power Bed Powder bed and inkjet head 3D
printing (3DP)
Electron-beam melting (EBM)
Selective laser melting (SLM)
Sheet Lamination Selective Deposition Lamination
(SDL)

10. Materials
○ Thermoplastics
○ Rubber
○ Metals & Alloys
○ Ceramics powder
○ Modeling Clay
○ Paper
○ Photopolymers

11. Application
○ Medical Industry (Bio-Printing)
○ Aerospace and Aviation Industry
○ Automotive
○ Art/Design/Architecture
○ Food Industry
○ Personal/Consumer use

12. Video

13. Survey Charts

14. Survey Charts

15. Survey Charts

16. Advantages
○ Rapid Prototyping
○ Flexible in customization / personalization
○ Complexity (Aerospace or Micro-scale
medical bio-printing)
○ Fast manufacturing speed
○ Reducing cost

17. Disadvantages
○ Fewer manufacturing jobs
○ Limited choice of materials
○ Limited size of product
○ May pose other environmental problems
○ Safety issues

18. Work distribution
Name Work
Chan Choi Ching, Shania Perzi, Survey Analysis, video
Hui Ming Ho, Vincent Powerpoint, information
research
Ng Pui Yiu, Yoyo Perzi, Survey Analysis, video

19. Reference
○ http://www.philforhumanity.com/3D_Printing.
html
○ http://3dprinting.com/what-is-3d-
printing/#applications
○ https://en.wikipedia.org/wiki/3D_printing
○ http://3dprintingindustry.com/3d-printing-
basics-free-beginners-guide/
○ https://www.youtube.com/watch?v=dcX41EQ
1JTo

20. END