With the introduction of polyphenylsulfone (PPSF) for its fused deposition modeling systems, Stratasys Inc. has upped the ante on the mechanical performance available from plastic models created on rapid prototyping machines. This new PPSF offers a tensile strength of 8,000 psi, a flex modulus of 320,000 psi, and a heat-deflection temperature of 189C at 264 psi—all far above the ABS that previously represented the company's highest-performing material. PPSF also exhibits strong resistance to chemicals, including petroleum and chemicals used for medical sterilization. Parker Hannifin served as a beta-test site for the new material and managed to run a PPSF model of a crankcase vapor coalescer on a V8 engine for about 40 hours. Visit www.stratasys.com.
One way to keep a Formula One racing team moving at breakneck speed in the pit and at the test facility is to bring CAD drawings of the racing vehicle’s parts down to the test facility and even out to the track.
Most of us would just as soon step on a cockroach rather than study it, but that’s just what researchers at UC Berkeley did in the pursuit of building small, nimble robots suitable for disaster-recovery and search-and-rescue missions.
Design engineers need to prepare for a future in which their electronic products will use not just one or two, but possibly many user interfaces that involve touch, vision, gestures, and even eye movements.
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