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Stereolithography. Richard Morton. How it works. On each layer, the laser beam traces a part cross-section pattern on the surface of the liquid resin. . Stereolithography is an additive fabrication process utilizing a vat of liquid UV- Curable Photopolymer “resin“

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stereolithography

Stereolithography

Richard Morton

how it works

How it works

On each layer, the laser beam traces a part cross-section pattern on the surface of the liquid resin.

Stereolithography is an additive fabrication process

utilizing a vat of liquid UV- Curable Photopolymer “resin“

and a UV laser to build parts a layer at a time.

After a pattern has been traced, the SLA's elevator platform descends by a single layer thickness. Then, a resin-filled blade sweeps across the part cross section, re-coating it with fresh material. A complete 3-D part is formed by this process.

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How it works

  • Stereolithography is an additive fabrication process
  • utilizing a vat of liquid UV- Curable Photopolymer “resin“ and a UV laser to build parts a layer at a time.
  • On each layer, the laser beam traces a part cross-section pattern on the surface of the liquid resin.
  • After a pattern has been traced, the SLA's elevator platform descends by a single layer thickness.
  • Then, a resin-filled blade sweeps across the part cross section, re-coating it with fresh material.
  • A complete 3-D part is formed by this process.
costs

Materials

SLA machines are able to use photopolymers, which are plastics that react to lasers.

Costs

The photo-curable resin can cost any where from $300 to $800 per gallon. An SLA machine can cost from $100,000 to $400,000.

pros cons

Pros/Cons

  • There is no limitations to the shapes of the parts.
  • A functional part might take 6 to 12 hours.

Most SLA machines can produce parts with a maximum size of 20” x 20” x 24”.

file types

File Types

Most machines accept either .stl or .iges files.

origination

Origination

The term “stereolithography” was coined in 1986 by Charles Hull.

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Works Cited

http://en.wikipedia.org/wiki/Stereolithography

http://computer.howstuffworks.com/stereolith5.htm

http://www.rapidsolutions.com/stereolithography.htm