CompositesWorld

JUL 2018

CompositesWorld

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NEWS 43 CompositesWorld.com UAV Update Curtis Mullen, the company's chief technical officer, says design and testing is nearly complete for a new electric, multi-rotor UAV. At 3m in length and weighing about 15 kg, it is, except for the electronics, built entirely from carbon fiber composites. "e chassis is a self- aligning, monocoque structure made of CNC-routed carbon plate," Mullen reports. Tubular carbon of varying fiber orientation and moduli, depending on local loads, comprises the remainder of the structure. At CW July press time, the company planned to complete construc- tion and flight testing in the June/July timeframe and introduce Venturer to the market later in 2018. Drones dovetail with 3D printing Given the rapid development of drone technology, it should come as no surprise that drone builders have provided the impetus for additive manufacturing of composites. Drone designers are not only using large-format 3D printers to do the rapid prototyping for which the processes were first conceived, but also, as those processes evolve, to provide tooling and finished parts as well, to meet quick turnaround times required by drone OEMs. Impossible Objects (Northbrook, IL), for one, recently part- nered with Aurora Flight Sciences (Manassas, VA) to 3D print a 76-by-38-mm rear stabilizer mount from high-density polyeth- ylene (HDPE) reinforced with 25.4-mm chopped carbon fibers, using its Composite-Based Additive Manufacturing (CBAM) technology. e part was installed on a new aircraft in develop- ment at the time, replacing a part made from unreinforced nylon that was breaking. Although additive manufacturing technology FIG. 6 Additive manufacturing tooling alternative Swift Engineering printed the tooling for this drone propeller from Ultem 1010, a high-temperature PEI material, using Stratasys Inc. FDM equipment. The mold comprises two matched halves for a compression mold which took approximately 30 hours of build time. The propeller blades are molded from carbon-fiber reinforced epoxy. Source | Stratasys PRESENTER PRESENTED BY EVENT DESCRIPTION: Pultrusion is a cost effective processing operation that is capable of producing structural composites with continuous reinforcing fibers. Resin selection is important to optimize the production of a specific profile or allow a wide range of products to be manufactured. Many additives are available for thermosetting polyesters and vinyl esters to achieve specific performance requirements such as fire retardancy, corrosion, high temperature performance, and surface finish. is presentation will outline a path to meet application requirements and troubleshoot issues that may occur in production. PARTICIPANTS WILL LEARN: • Pultrusion Machine Configuration • Resin Bath Setup • Resin Manufacturing and Raw Materials • Formulating to Meet Application Requirements and Troubleshooting Pultrusion —Process Design and Resin Formulation July 11, 2018 • 2:00 PM ET REGISTER TODAY FOR WEBINAR AT: SHORT.COMPOSITESWORLD.COM/POLYNT711 polynt.com/en DOUG COPELAND Application Specialist

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