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Northwestern University researchers have developed a stereolithographic 3D printer that can print an object the size of an adult human in just a couple of hours. Called HARP for high-area rapid printing, this printer uses a patent-pending version of stereolithography that circulates liquid plastic to remove heat, which can cause printed parts to crack and deform.
To dissipate the heat that is generated from the polymerization of the resin, HARP prints vertically and uses a nonstick liquid that behaves like Teflon. The printer projects ultraviolet light through a window to solidify resin on top of a vertically moving plate. The “liquid Teflon” flows over the window to remove the heat and then circulates it through a…READ MORE