Page 174 - DJJ 40173 compile notes - E-BOOK NEW EDIT WITH INDEX_Neat

Vat Polymerisation

◦ This process uses a vat of liquid resin photopolymer to create an object
layer by layer.

◦ Mirrors are used to direct ultraviolet light which cures each resin layer

through photopolymerisation.

◦ The Vat polymerisation process uses Plastics and Polymers.

◦ a Vat is filled with the liquid photopolymer resin. The 3D model is built

on a platform which dips into the resin to a depth of a single layer.

◦ The height of a single layer is usually 0.05 mm to 0.15 mm.

◦ An ultraviolet light source which direct the radiation onto resin by

reflection from motor-controlled mirrors is mounted at the top of the

apparatus.

◦ The laser light head can move along the horizontal plane generating

layer by layer by hardening the liquid resin through directing radiation

at specific coordinates along the plane.