A start-up company in New York has developed a new vibration-proof fastening system that offers interesting opportunities for plastics molding. The company, called Permanent Technologies, uses a patented system in which the nut has one or more tines that work in conjunction with longitudinal bolt thread channels to prevent counter rotation and loosening. Months-long testing on U.S. Navy Hovercrafts proved the concept. Engineers are often loathe to try new designs, but this is worth a look—particularly if you’re experiencing failures due to vibration. Some cool design ideas are possible. Take a pump assembly for example. Permanent Technologies can produce a cut-out underneath the pump cover and put a hexagon-shaped tine in the hole located in the body of the assembly. Then put the cover on and put a bolt through the cover. The bolt would then click through the tines just as if they were on top of a nut. You get vibration-proof blind hole fastening. And that translates well into injection molding, where undercuts can be mass produced at high speeds with tool action.
HP revealed more of its 3D printing plans in a recent webinar. Senior vice president of inkjet and graphics solution business Stephen Nigro spoke about how the technology works and expanded on HP's vision of open collaboration to commercialize its Multi Jet Fusion 3D printing technology for end-production, and open collaboration on new materials. He also said HP will create software to help users decide when to use Multi Jet Fusion versus conventional subtractive manufacturing.
A lightweight electric urban concept car designed by several European companies weighs only 992 lb without its battery. It would have weighed 26.7 lb more if its windows were made of glass instead of the specially coated LEXAN polycarbonate resin from SABIC Innovative Plastics.
Skylar Tibbits' team in MIT's Self-Assembly Lab is now 4D printing self-assembling shapes made of programmable carbon composites and custom wood grain. The composites are being used in a sport car airfoil, and the wood grain is beautiful.
The NanoSteel Company has produced high-hardness ferrous metal matrix composite (MMC) parts using a new nanosteel powder in a one-step 3D-printing process. Parts are 99.9% dense, crack-free, and with wear resistance comparable to M2 tool steels.
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