This study is going to develop an Active Separation Bottom-Up
Stereolithography System (ASBUS) to manufacture a foot scale customized
objects. ASBUS follows the principles of Vat Photopolymerization (VP)
where in this study, a light curable resin is prepared and cured in a
fully automatic system by dynamic mask generators based on the bottom-up
configuration to be economically operated. To 3D print a foot scale
object, the pulling forces between the cured portion and bottom surface
of the resin tank has to be controlled. A separation strategy based on
peeling angle will be implemented to reduce the forces and safely
discard the cured layer from the tank’s bottom surface by making it as
a flexible membrane that expands and reverts the action while 3D
printing.

A special control method for active release is proposed, which uses a flexible light-transmitting film as the core, and is controlled by an exhaust pump. When processing is performed, the release film can actively produce a larger peeling angle to achieve The phenomenon of peeling occurs, so that the fineness of its large workpieces can be maintained during printing, and the workpieces of various complex structures can be completed.

Due to the relationship between the force of part separation of the larger workpieces on the market, almost all adopt the up-bottom 3D printing system, but the up-bottom type consumes a large amount of resin, resulting in excessive cost, and this bottom-illumination molding machine, by changing The release method of the resin tank can effectively reduce the generation of the large-area force of part separation, so that consumers can use the more economical raw material costs to form large objects.