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Additive Manufacturing - Continuous Liquid Interface Production (CLIP) Technology:

9/11/2015

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​In this technique, instead of printing an object layer-by-layer, which leads to incredibly slow speeds as well as a weak overall structure similar to that of shale, this new process harnesses light as a way to cure the resin, and oxygen as an inhibiting agent. The continuous process begins with a pool of liquid photopolymer resin. Part of the pool bottom is transparent to ultraviolet light and oxygen(the window). An ultraviolet light beam shines through the window, illuminating the precise cross-section of the object. The light causes the resin to solidify. The object rises slowly enough to allow resin to flow under and maintain contact with the bottom of the object. An oxygen-permeable membrane lies below the resin, which creates a “dead zone” (persistent liquid interface) preventing the resin from attaching to the window (photopolymerization is inhibited between the window and the polymerizer). The machine will then produce a series of cross sectional images using ultraviolet light in a fashion similar to playing a movie. By bringing oxygen into the equation, a traditionally mechanical technique for 3D printing suddenly becomes a tunable photochemical process which rapidly decreases production times (25 to 100 times), removes the layering effect.

Explaining Video for the process:

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