A short presentation on Selective Laser Sintering. Useful for beginners(school-undergraduate) College Presentation Part

2. • A prototype is a basic working model, mock-up or a simple simulation of the product
which leads us to create a minimal viable product to final product and variations.
• A prototype could be a working model, representational (non-working) model, miniature
or a scale model, video or a photo demonstration based on the factors like a problem to
be solved, the mandate of the end customer, investor/industry requirements or
prototype that best satisfies the purpose.

3. • Rapid prototyping is a fast design process that involves an idea,
prototyping, and testing of a physical part, model, or building using a
3D computer-aided design (CAD). The building of the part, model, or
assembly is typically accomplished through additive manufacturing
which is also known as 3D printing.
• Rapid Prototyping technology employs various engineering e.g.
computer control and software techniques including laser, optical
scanning, photosensitive polymers, material extrusion and deposition,
powder metallurgy etc. to directly produce a physical model layer by
layer (Layer Manufacturing) in accordance with the geometrical data
delivered from a 3D CAD model.

4. • Prototyping can improve the quality of requirements and specifications provided
to developers.
• Reduced time and costs.
• Users are actively involved in the development.
• Quicker user feedback is available leading to better solutions.
• Errors can be detected much earlier.
• Missing functionality can be identified easily.
ADVANTAGES OF RP
• High precision RP machines are still expensive.
• RP systems are difficult to build parts with accuracy under +/- 0.02mm and wall
thickness under 0.5mm.
• The physical properties of the RP parts are normally inferior to those samples that
made in proper materials and by the traditional tooling.
• The RP parts are not comparable to (CNC) prototype parts in the surface
finishing, strength, elasticity, reflective index and other material physical
properties.
DISADVANTAGES OF RP

5. Stereolithography (SLA)
Selective laser sintering (SLS)
Direct metal laser sintering(DMLS)
Fused Deposition Modelling (FDM)
Binder jetting
Poly jetting
Laminated Object Manufacture

6.  SLS is a rapid prototyping (RP) process that builds models from a wide
variety of materials using an additive fabrication method.
 The build media for SLS comes in powder form, which is fused together
by a powerful carbon dioxide laser to form the final product.
 The SLS process begins, like most other RP processes, with the standard
.STL CAD file format, which is exported now by most 3D CAD packages

7. The Selective Laser Sintering (SLS) process was developed by The University
of Texas in Austin, and was commercialized by DTM, Corporation out of
Austin, TX in 1987 with support from B.F. Goodrich.
The first SLS system was shipped in 1992, and there are currently several
systems in use worldwide.
Dr.Joe Beaman
Carl R. Deckard

8. ROLLER
POWDER
DELIVERY
SYSTEM
FABRICATION
PISTON
POWDER BED
SCANNER SYSTEM
LASER

9. 1)Laser ; 2) Scanner system; 3) Powder delivery system; 4 )Powder delivery piston; 5) Roller; 6) Fabrication piston; 7)
Fabrication powder bed;8) Object being fabricated
A) Laser scanning direction; B)Sintered powder particles (brown state);C) Laser beam;D) Laser sintering ; E )Pre-
placed powder bed (green state); F) Unsintered material in previous layers

10. direct metal laser sintering (DMLS) - when metals are used

11. Easy to dye
Speed
Design Freedom
Self-Supporting
Waste
Prone to shrinkage and
warping.
Porous and brittle.
Cost
ADVANTAGES DISADVANTAGES

12. Industries-Automotive,Aerospace,Medical
Common use cases include:
• Custom tools and fixtures
• Fuel tanks
• Air ducts
• Architectural models
• Flight rated components for
unmanned aerial vehicles
• Automotive designs
• Artistic sculptures