rapid prototypes

Stereolithography (SLA), the first Rapid Prototyping process, was developed by 3D Systems of Valencia, California, USA, founded in 1986. A vat of photosensitive resin contains a vertically-moving platform. The part under construction is supported by the platform that moves downward by a layer thickness (typically about 0.1 mm / 0.004 inches) for each layer. A laser beam traces out the shape of each layer and hardens the photosensitive resin. Highlights of Stereolithography ?The first Rapid Prototyping technique and still the most widely used. ?Inexpensive compared to other techniques. ?Uses a light-sensitive liquid polymer. ?Requires post-curing since laser is not of high enough power to completely cure. ?Long-term curing can lead to warping. ?Parts are quite brittle and have a tacky surface. ?No milling step so accuracy in z can suffer. ?Support structures are typically required. ?Process is simple: There are no milling or masking steps required. ?Uncured material can be toxic. Ventilation is a must.

Before undertaking the mechanical design of new products, it is necessary to have a prototype before opening mould or tooling to

try rapid prototype    rapid prototyping    to get through more products