3D Prototypes and Accessories
The working principle of Scriba’s 3D printer is stereolithography (SLA). SLA is a technique that allows to fabricate single tridimensional objects starting directly from digital data processed by a CAD software.
Its main application is fast prototyping and works with photopolymerization of a liquid resin, building objects by following expositions, layer by layer. Resin is sensitive to ultraviolet radiation delivered by a sophisticated projector that traces precise forms. This technique provides that single layer of deposited resin are linked chemically between them allowing to generate objects with an elastic isotropic module and high mechanic resistance.
Scriba Nanotechnologies uses B9Creations printer with B9R-2 Black, B9R Yellow and B9r-1 Cherry resin, able to produce high definition prototypes and accessories. Our printer allows fabrication of parts with characteristic dimensions of 200 µm.
PROTOTYPES OBTAINED WITH OUR PRINTER
Customers can give to Scriba the design of object of interest in form of 3D or 2D CAD or can commit the design phase to Scriba. Scriba team will realize the effective prototype, following received indications, advising potential improvements to optimize the product. Once received
approval of the customer, new object will take form.
Here explained more in detail the working principle of this technology
- The movimentation system of the printer spreads a thin layer of liquid polymer on the printing area. Being the photopolymer a viscous liquid with high surface tension it will distribute over the whole platform.
- Liquid polymer is sensitive to UV rays. When it is exposed with the focalized image of the projector, the resin will change its state from liquid to solid. 3D design will be decomposed in slices, that are exposed like superimposed bidimensional images. The parts that will not be directly exposed will remain liquid. The movement of the tank containing the resin allows to redeposit a layer of liquid resin of few tens of micron of thickness on already polymerized strata, and the movement in z allows to control development in thickness.
- These two passages are repeated till completing all the slices of the tridimensional model.
- Once the printing process is completed and the entire object has been printed, the 3D prototype is extracted from the resin tank. Liquid in excess simply drifts away and can be used for other printing.
- Fabricated parts are removed from the construction table, polished and refined.