66. RAPID PROTOTYPING

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The key concept is RAPID - generally this is an all-in-one-step production of a part geometry.

Parts are used for,

- prototypes to allow fast review of part shape, simple assembly, aesthetics, manufacturability, etc.

- low volume production - very small numbers of parts can be made using this technology.

General advantages,

- reduce prototype/production times from months to weeks or days

- a physical model is easier to "sell" to customers and management

- physical models are easier to check for errors. Graphical methods often result in cluttered views

- avoids the high cost of prototype tooling, and allows (more) design iterations

- prototypes costs can be lower than production types

General disadvantages,

- very expensive capital costs

- tolerances are generally >.005"

- primary materials are specialized, and other steps are required to produce metal parts