Review of Rapid Prototyping-technology For The future :

BY

PURUSHOTHAM.L

What is Rapid Prototyping ? The term “Rapid prototyping” refers to class of technologies that can automatically create models from Computer-Aided Design (CAD) data.3d printer allow designers to create prototype of the design.It is an additive process.

The Basic Process :

Create a CAD model of the design. Convert the CAD model into STL format.Slice the STL model into thin layers.Construct the model one layer atop another.Clean and finish the model.

Rapid prototyping Techniques

Stereo LithographyLaminated Object ManufacturingFused Deposition ModelingSelective Laser SinteringSolid Ground Curing3-D Ink-jet Printing

Stereo Lithography :

Abbreviation : SLA

Material type : Liquid(Photopolymer)

Materials : Thermoplastics (Elastomers)

Min layer thickness : 0.02mm

Surface finish : Smooth

Build speed : Average

Applications : Form / fit testing, Functional testing, Very detailed parts, Presentation models, Snapfits..

Laminated Object Manufacturing :

Abbreviation : LOM

Material type: Solid(Sheets)

Materials : Thermoplastics such as PVC; Paper; Composites(Ferrous metals; Non-ferrous metals; Ceramics)

Min layer thickness : 0.05mm

Surface finish : Rough

Build speed : Fast

Applications : Form/fit testing, Less detailed parts, Rapid tooling patterns…

Fused Deposition Modeling :

Abbreviation : FDM

Material type : Solid (Filaments)

Materials : Polycarbonate, Polyphenylsulfonite; Elastomers

Min layer thickness : 0.15mm

Surface finish : Rough

Build speed : Slow

Applications: Form/fittesting, Functional testing, Small detailed parts, Presentationmodels…

Selective Laser Sintering :

Abbreviation : SLS

Material type : Powder(Polymer)

Materials : Thermoplastics: Nylon, Polyamide and Polystyrene ; Elastomers ; Composites

Min layer thickness: 0.10mm

Surface finish : Average

Build speed : Fast

Applications : Form/fit testing, Functional testing, Less detailed parts..

Direct Metal Laser Sintering :

Abbreviation : DMLS

Material type : Powder(Metal)

Materials : Ferrous metals such as Steel alloys, Stainless steel, Tool steel; Aluminium, Bronze , Cobalt-chrome, Titanium, Ceramics..

Min layer thickness : 0.02mm

Surface finish : Average

Build speed : Fast

Applications : Form/ fittesting, Functional testing, Rapid tooling, High heat applications, Medical implants, Aerospace parts..

3-D Ink-jet Printing :

Abbreviation : 3DP

Material type : Powder

Materials: Ferrous metals such as Stainless steel; Non-ferrous metals such as Bronze; Elastomers; Composites; Ceramics

Min layer thickness : 0.05mm

Surface finish : Rough

Build speed : Very Fast

Applications : Concept models, Limited functional testing, Architectural & landscape models, Consumer goods & packaging…

Application Of RP Technologies

PrototypingRapid ToolingRapid Manufacturing

It is also used in other various industries like aerospace,automative,jewelry,bio-medical etc…

Advantages :Almost any shape are geometric features can be producedReduction in time and cost from 50% to 90%Errors can be detected at earlier stageMaterial waste is reducedNo tooling is necessary

Disadvantages :Poor surface finish Limited strength Accuracy is less

Any Queries ?

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