Definition. Basic Processes. Classification. Advantages & Disadvantages. Application of RP.

1. ----------------------------------------------
RAPID PROTOTYPING
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Mr. KONAL SINGHMr. KONAL SINGH
Director and Founder of
ProBotiZ Group, NagpurProBotiZ Group, Nagpur
(W) - Probotizgroup.com (M) - 8862098889, 9423632068 (E) - probotizinfo@gmail.com

2. OUTLINES
 Definition.
 Basic Processes.
 Classification.
 Advantages & Disadvantages.
 Application of RP.
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3. DEFINITION
 RAPID PROTOTYPING
The term rapid prototyping (RP) refers to a class
of technologies that can automatically construct
physical models from Computer-Aided Design (CAD)
data.
 1st
technique for RP become available in late
1980’s .
 1st
machine was released onto the market in late
1987.
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4. THE BASIC PROCESS
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CREATING THE 3D CAD MODEL OF THE DESIGN
CONVERTING THE CAD MODEL INTO STL
FORMAT
SLICING THE STL FILE INTO THIN LAYERS
CONSTRUCTING THE MODEL ONE LAYER A TOP
ANOTHER
CLEANING AND FINISHING THE MODEL

5. THE BASIC PROCESS
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 CAD MODEL CREATION
First the object to be build is modeled
using a CAD software package
Or
by using a laser scanner or a
Coordinate Measuring Machine (CMM).
,,,,,,,,,,,,,,,,,,,,,,,,,(“Reverse Engineering”)

6. THE BASIC PROCESS
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 CONVERSION TO STL FORMAT
 STL (standard tessellation language).
 This format represents a 3-dimentional surface
 This file contains the coordinates of the
component.

7. THE BASIC PROCESS (cont.)
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Since the STL-format is universal, this process is
identical for all of the RP build techniques.

8. THE BASIC PROCESS
SLICE THE STL FILE
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9. THE BASIC PROCESS
 LAYER BY LAYER CONSTRUCTION
 The component is made layer by layer.
 As the first layer is created the model is lowered
by the thickness to produced next layer.
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10. THE BASIC PROCESS
 CLEAN AND FINISH
 Remove part from the machine.
 Detaching all supports.
 cleaning and surface treatment.
 apply possible painting etc.
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11. PR TECHNOLOGIES
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 Classification

12. LIQUID PHASE RP TECHNOLOGIES
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 Stereo Lithography (SLA)

13. POWDER FORM RP TECHNOLOGIES
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 Selective Laser Sintering (SLS)

14. GENERAL ADVANTAGES OF RP
 Almost any shape or geometric feature can be
produced.
 Errors and flaws can be detected at an early stage.
 Material waste is reduced.
 No tooling is necessary .
 The designers and the machinery can be in separate
places.
 Reduction in time and cost. 14

15. GENERAL DISADVANTAGES OF RP
 The price of machinery and materials is high.
 The surface is usually rougher than machined
surfaces.
 Some materials are brittle.
 The strength of RP-parts are weaker in z-direction
than in other.
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16. APPLICATION OF RP ?
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17. APPLICATION OF RP
 TECHNOLOGY
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The task was to test different alternative INTAKE
MANIFOLDS. The parts (three) were made of
Windform XT with laser sintering. By using SLS the
time from desktop to product took only about 10 %
of the time earlier.

18. APPLICATION OF RP
 MEDICAL
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Medicine Models of skulls
etc can be used for
training of surgical
operations

19. APPLICATION OF RP
 MEDICAL (cont.)
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These Siamese twins were successfully
separated. The operation was planned with
models of the skulls.

20. APPLICATION OF RP
 ARCHITECTURE
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21. REFERENCES
1. C.K., Leong, K.F. (2000) Rapid Prototyping:
Principles and Applications in Manufacturing, World
Scientific.
2. Pham, D.T., Dimov, S.S. (2001) Rapid
Manufacturing, Springer-Verlag London Limited.
3. Gebhardt, A., (2003) Rapid Prototyping, Hanser
Gardner Publications, Inc., Cincinnati.
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22. THANK YOU
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