In stereo-lithography, it is possible to create particularly precise and fine surfaces; the results can, therefore, be used for art casting or even as end products. The UV-unstable material does, however, turn yellowish-brown after a short time, which is why a layer of color has to be applied.

 

Special software transforms the data obtained by 3D scanning into layers with a thickness of 0.05 to 0.25 millimeters. A laser beam traces these layers on the surface of a liquid resin (for example, epoxy resin) and the material solidifies at the corresponding location (polymerization). The object is then immersed by the thickness of one layer in the resin bath and the next layer of the object is then solidified with the laser. The three-dimensional CAD model* thus gradually materializes from the surface into the depth. After being built, the object is cleaned and cured using UV light. Supports built along with the object in order to stabilize overhanging parts of the form have to be removed.


The process is used in industry mainly when models need to be compared quickly and inexpensively with the CAD. It is also suitable for rapid tooling, meaning for end products on a small series scale.

The Kunstgiesserei regularly works in stereo-lithography with regional and international partners.

 

*CAD = Computer Aided Design: here technical construction files, such as, for example, 3D models, are created with the help of software.

 

Robotmech