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Home » U.S. Navy Explores 3-D Printing With Explosive Materials

U.S. Navy Explores 3-D Printing With Explosive Materials

April 23, 2018
Maritime Executive

The staff of E&G Associates — engineers Benjamin Ennis, Brandon Ennis, Nasseem Jibrin and Michael Winn, all graduates of the University of Tennessee — are working on ways to use an off-the-shelf Hewlett Packard 3-D printer to create shaped charges.

HP's ink-and-thermoplastic powder bed fusion printers have been on the market since 2016, making them a relatively recent arrival (compared with more established 3-D printing technologies like material extrusion or laser sintering). Hewlett Packard advertises them for low-cost, rapid prototyping and short-run parts manufacturing.

“The printer spreads the nylon powder and then prints on that flat layer of powder with the ink. Then the printer passes a heat lamp back and forth to make the dark areas melt. And that’s how you get your parts,” Jibrin told UTC's alumni magazine. “The process is repeated in three steps. Spread a layer, ink the specific selected areas and fuse with heat lamps. You do that over and over again until you build a part.”

HP's printers are not marketed for bomb-making, but with some careful R&D and a $150,000 federal grant from the Small Business Innovation Research program, the E&G team thinks that the platform can be adapted for military applications. The group is testing nylon powder infused with explosive material, polymer additives and printer ink to create its 3-D explosive charges.

E&G doesn't have a blast chamber on site to test out the final product, but it has an agreement with the Missouri University of Science and Technology's engineering department, which has all the equipment needed to detonate samples and study the results. “We’ll test in a chamber that’s basically a giant metal tube. It’s about eight feet high with inch-thick walls,” said Benjamin Ennis.

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KEYWORDS Aerospace & Defense High-Tech/Electronics Industrial Manufacturing North America SC Planning & Optimization Sourcing/Procurement/SCM Technology
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