Process SLA - Stereo lithography
SLA is the most common RPT technique, and produces acrylic and epoxy parts. Almost unlimited geometry possibilities, fine geometric details and high accuracy (tolerances lie between 0.05% to 0.2%). SLA is less suited for heavy parts.

The required geometry is produced in thin layers (0.1-0.25 mm). A CNC-controlled laser beam cures a pattern in the surface of a fluid photosensitive polymer. The hardened layer is then stepwise lowered allowing the fluid to cover the part.

Typical applications are prototypes of injected moulded plastic parts and modelling of human bones and skulls. Maximum dimensions are about 500 * 500 * 500 mm.
Danish Name Stereo litografi (lagvis laserhærdning af fotopolymer)
Category Joining processes, rapid prototyping
Typical products Skull, model
Plate for ski rod
Bottled ship, model
Cylinder head
Briefcase handle
Headset, wireless telecommunication
Competing processes SGC - Solid ground curing
References Danish Technological Institute, Centre for Product Development
LEGO Futura
Price notes Normal price for parts as small as a match-box is about 2000 DKK.
Keywords RPT
Rapid prototyping
Additive manufacturing
Free form
Photo Thomas Nissen (Computer graphics)
Copyright © 1996-2019 Torben Lenau
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