SLS(Experimental setup and working process) SOME 3D MODELS INPUT PARAMETERS COMMONLY USED POWDER MATERIALS ADVANTAGES LIMITATIONS APPLICTIONS CASE STUDY I CASE STUDY II CONCLUSION

1. Selective Laser Sintering
(SLS)
Jagannath
M.Tech (cim)
M.S.R.I.T
1ms16mcm08

2. CONTENTS
INTRODUCTION
SLS(Experimental setup and working process)
SOME 3D MODELS
INPUT PARAMETERS
COMMONLY USED POWDER MATERIALS
ADVANTAGES
LIMITATIONS
APPLICTIONS
CASE STUDY I
CASE STUDY II
CONCLUSION

3. INTRODUCTION
WHY RAPID PROTOTYPING NECESSARY?
 To decrease development time.
 To decrease costly mistakes.
 Increasing number of variants of products.
 Increasing product complexity.
 Decreasing delivery time.

4. Advantages of RP
• Process is fast and accurate.
• Superior quality surface finish is obtained.
• No need to design jigs and fixtures.
• No need to mould or other tools.
• Minimal martial wastage.

5. Selective Laser Sintering (SLS)
• Manufacturing Technique
• It is patented in 1989.
• Made with Plastic/Elastomer Powder
• Sample built layer by layer.
• There is no milling steps required.
• File type ‘.stl’ used - structural triangle language
• Finished sample cools for 12-24 hrs. then pulled out of
Powder

6. Experimental setup and Working process

8. Some 3D Models Prepared using SLS

9. Example of SLS Part (Drill)

10. INPUT PARAMETERS:
1)POWDER CHARACTERISTICS
2)FOR MACHIN-Type of material(polycarbonate)
3)FOR LASER
●
Laser focus diameter {Fs=(AFMC)/D}
●
Laser wave length
●
Beam profile
●
Laser power
●
Scanning velocity

11. Commonly used powder materials:
o Aluminum-Filled (PA12-AL)
o Polyamide(PA)
o Glass filled polyamide(PA-GF)
o Alumide.
o Impact-Resistant Nylon (Duraform EX)
o Nylon (Duraform PA)
o Glass-Filled Nylon (Duraform GF)
o Flame Retardant Nylon (Duraform FR100)
o Carbon Fiber Filled Nylon (Windform XT)
o Rubber-Like (Duraform Flex Plastic)

12. ADVANTAGES:
 It offers the key advantage of making functional parts in
essentially final materials.
 It is an automated process.
 The method has extended to provide direct fabrication of
metals and ceramic objects and tools.
 SLS are, Fast, Economical, Durable

13. LIMITATIONS:
 LOW Surface finish.
 HIGH Equipment cost.
 SKILLFULL Labor.

14. APPLICATIONS
• Aerospace Hardware.
• Medical and Healthcare.
• Electronics; Packaging, Connectors.
• Military Hardware.
• Automotive industries
• Consumer goods(domestic application, power tools, audio
components)

15. APPLICATIONS
• Architects( landscapes, office layouts, model buildings, furniture)

16. Case study I
• Case study I: cranial implant manufactured with selective laser sintering
process
Titanium is used to manufacture the cranial implants, but the
material and machining Methods are highly expensive and time
consuming titanium is relatively stiff compared to the Bone but
one of the disadvantage of this material is this lead to long -term
issues with fit and compart in the skull, more recently focus is
turned to plastic Polyether Ether Ketone (PEEK) Cranial implant.

17. Cranial implant

18. Case study I
• By using selective laser sintering cranial implant prototype has
been created by a team of doctors Design engineers and experts
material testing group result of which
 better fit
Less time taken in surgery
 provide a grates comfort to the patient.

19. Case study II
• Case study II: LASER SINTERED INJECTION MOULDS, CASE STUDIES MADE IN BELGIUM
• Rapid manufacturing is a new trend in mould making. Several techniques
are used to shorten the production cycle of mould making. Main focus
for the presented research were Material Addition Processes (MAP) such
as Selective Laser Sintering (SLS). The cable support case has been
studied during several years. The moulds for this case are always based
on an inserted core and cavity geometry.
•

20. Case study II
fig :1 insert for the cable support
fig:2 cable support “product”

21. Case study II
• Cable support mould is very difficult to manufacture by other
method it is possible to make The a moulds with cavity, insert,
depth, complexity are no limitation of selective leaser sintering
Process smaller grain size of the powder brings a better accuracy
and surface roughness.
•

22. conclusion
 Selective laser sintering provides exact representations of your
complex designs in just days. This means that without delay.
 Using the physical prototype, you can detect errors early and
correct them before it's too late.
SLS is most flexible process ,hence it is used in a various industrial
application.

23. THANK YOU