: Prototyping Techniques



Jan 27, 2009

Prototyping Techniques

Fused Deposition Modeling (FDM)
Ideal for conceptual models, engineering models, and functional test prototypes
Cost effectiveness

Laminated Object Manufacturing (LOM)
Is a technique to create low cost 3D models from CAD data
Uses a laser to cut layers of a glue backed paper material
Large parts because there is no chemical reaction involved
Accuracy is less than for SLA and SLS
Models should be sealed to avoid moisture
Works with paper so its an accurate technique

Stereolithography (SLA)
Creation layer by layer of 3D object using resin and polymer
The machine splits it into thin layers
Was the first rapid prototyping technique
Inexpensive compared to other techniques
It is useful in art for its organic forms
It is used in medicine for 3D corporal models of several anatomical regions

Open Hardware
Social movement based on open software ideals
People interested on technology created new devices by combining pieces of other devices
3D printers are open hardware because it can be changed or modified on what you want or how you want to use it
You can assemble the machine your way
Is cheaper than an industrial machine
Fab@Home, project to guide you to create your own machine, it just prints small parts and the quality is not good enough

Selective Laser Sintering (SLS)
Technique for manufacturing solid objects
For large products with layer based manufacturing from metals, plastics, or composite materials
Uses powder (thermoplastic material) to build models through a laser beam
Thin layers ranging between .003 and .006
Ideal for durable, functional parts. Its heat and chemically resistant
Can build metal objects
Is fast, economic, no support structure necessary, large and complex parts, all kinds of finishing degrees, porosity parts, rough surface finish, material changes require cleaning of machine

posted by Ricardo @ 11:04 PM

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