Unlike traditional “subtractive” methods of cutting and drilling metal, the $289,000 machine lays down successive layers of powdered metal into which a laser beam melts a traced cross-section of the desired shape, building up the object according to instructions imported in a computer-aided design, or CAD, file. provided many passers-by their first glimpse of a form of 3-D printing known as additive manufacturing. The Mlab machine on display at the booth for Romanoff International Supply Corp. There, a machine resembling a hulking 1970s mainframe computer beamed a highly focused laser onto a plate of atomized metallic powder and, over the course of 24 hours, grew a selection of gold rings. LAS VEGAS - To catch a glimpse of modern-day alchemy, jewelers who attended the JCK Las Vegas trade fair in June ventured past glittering displays of diamonds and gold to an equipment pavilion at the back of the Mandalay Bay Convention Center.
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