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3D Printing Progress
Posted on March 20, 2015 by  & 

Technology for layerless 3D printing

Carbon3D has an innovative approach to polymer-based 3D printing that promises to advance the industry beyond basic prototyping to 3D manufacturing. The new Continuous Liquid Interface Production technology (CLIP) harnesses light and oxygen to continuously grow objects from a pool of resin instead of printing them layer-by-layer. Carbon3D's CLIP technology raises the state-of-the-art in 3D printing in three ways:
GAME-CHANGING SPEED: 25-100 times faster than conventional 3D printing
COMMERCIAL QUALITY: produces objects with consistent mechanical properties
MATERIAL CHOICE: enables a broad range of polymeric materials
"Current 3D printing technology has failed to deliver on its promise to revolutionize manufacturing," said Dr. Joseph DeSimone, CEO and Co-Founder, Carbon3D. "Our CLIP technology offers the game-changing speed, consistent mechanical properties and choice of materials required for complex commercial quality parts."
How CLIP Works
Existing 3D printing, or additive manufacturing, technology is really just 2D printing, over and over again. As a result, 3D printed parts take many hours, even days, to produce and are mechanically weak due to their shale-like layers. Using a tunable photochemical process instead of the traditional mechanical approach, Carbon3D's layerless continuous liquid interface production technology (CLIP) eliminates these shortcomings to rapidly transform 3D models into physical objects. By carefully balancing the interaction of UV light, which triggers photo polymerization, and oxygen, which inhibits the reaction, CLIP continuously grows objects from a pool of resin at speeds 25-100 times faster than traditional 3D printing.
At the heart of the CLIP process is a special window that is transparent to light and permeable to oxygen, much like a contact lens. By controlling the oxygen flux through the window, CLIP creates a "dead zone" in the resin pool just tens of microns thick (about 2-3 diameters of a red blood cell) where photopolymerization cannot occur. As a series of cross-sectional images of a 3D model is played like a movie into the resin pool from underneath, the physical object emerges continuously from just above the dead zone. Conventionally made 3D printed parts are notorious for having mechanical properties that vary depending on the direction the parts were printed because of the layer-by-layer approach. Much more like injection-molded parts, CLIP produces consistent and predictable mechanical properties, smooth on the outside and solid on the inside.
Source and top image: Carbon3D
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