July 24, 2018 Volume 14 Issue 28

Mechanical News & Products

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New 3D-printing resin creates static-dissipative parts

The new xESD resin from Nexa3D, a leading maker of ultrafast professional and industrial polymer 3D printers, is a rigid photoplastic material with a stable carbon nanotube dispersion that delivers optimal static-dissipative performance and isotropic mechanical properties, which are required by the electronics manufacturing industry. The xESD resin allows users to create custom jigs, fixtures, grippers, assembly aides, and enclosures in hours without the risk of ESD damage to high-value electronic components. Available for NXE Pro series printers and the XiP desktop 3D printer.
View the video and learn what else is new from Nexa3D.


Test your knowledge: High-temp adhesives

Put your knowledge to the test by trying to answer these key questions on how to choose the right high temperature-resistant adhesive. The technical experts from Master Bond cover critical information necessary for the selection process, including questions on glass transition temperature and service temperature range. Some of the answers may surprise even the savviest of engineers.
Take the quiz.


Next-gen controlled pneumatics from Festo

Festo's controlled pneumatics combines proportional technology, sensors, and control algorithms to form a control loop. These are mechatronic pneumatic systems with innovative valve and communication technologies that enable digital influence in conjunction with closed-loop control based on a sensor variable. This creates new areas of application, especially for pressure and flow control. Learn about digitized pneumatics in tire manufacturing and how piezo technology increases valve life in wafer manufacturing.
Read the full Festo applications article.


Standard parts in hygienic design from JW Wico

JW Winco has developed a complete product family of special standard parts that combine minimal contamination tendency with optimum cleaning ability to meet the highest sanitary standards. The new GN 6226 spacers, which avoid duplicate mounting surfaces, join the existing range of knobs, U-handles, hand levers, indexing plungers, latches, cover sleeves, leveling feet, and screws. In all cases, stainless steel with vibratory finished or polished surfaces is used as the material.
Learn more.


Small valves prevent big blowups

Smart Products USA says their best example of a true relief valve can be found in Models #103 and #109. Available as a 1/8" Male NPT style, these valves are easily placed into plastic, metal, or other materials with absolutely no tubing involved. While the majority of the company's valves function as both a check and pressure-relief flow control option, Models #103 and #109 are more suited to only relieve pressure. When pressure builds to a designated PSI level, this spring-loaded valve responds and allows flow of liquids/gasses slowly to prevent blowups or damage.
Learn more.


Great Resources: EXAIR Case Study Library

Learn how EXAIR compressed air-operated products improved production rates, lowered defects, increased safety, and provided quick ROI. Each of the more than 40 studies includes an application goal, the process problems before EXAIR, and the final improvements achieved. EXAIR's real-world gains include dollars saved, SCFM saved, decibels lowered, quality improvements, and more.
Check out the case study library.


New igus polymer spherical ball strengthens food safety

To make food-processing facilities and machinery even safer, igus, the Germany-based manufacturer of motion plastics, has launched a new standard in the form of the high-performance plastic iglide A181 as a spherical ball material for the igubal Food Contact (FC) joint system. Moving on stainless steel shafts, the spherical cap is three times more wear resistant than the previous version made from iglide FC180. It also costs 25% less and is self-lubricating, maintenance-free, and FDA and EU 10/2011 compliant.
Learn more.


Photo-chemical etching: What design engineers need to know

Dr. Angel Lopez, director of Business Development at micrometal GmbH, one of Europe's leading photo-chemical etching providers, discusses what considerations design engineers need to bear in mind when working with this versatile and sophisticated metal machining technology that produces complex and feature-rich metal parts and components that are burr and stress free.
Read the full article.


Honing a life-saver for aerospace component maker

Fuse pins are designed to hold a jet engine on a wing, but to break away in emergency situations, allowing the engine to separate from the wing to prevent catastrophic structural failure and fires. Learn how Sonic Industries relies on Sunnen's SV-1000 honing system to produce the 5- to 7-micron ID tolerance and proprietary finish critical to this part's performance. The CNC-controlled SV-1000 allowed Sonic to meet ramped-up customer demand when it replaced a manual honing system, decreasing cycle times dramatically and increasing part production.
Read the Sunnen case study.


Adhesives for titanium: Lap shear strength tests

When it comes to bonding titanium to itself or to other substrates, Master Bond has formulated a range of reliable, high-strength adhesives that yielded excellent results when tested for their lap shear strength using titanium substrates. Titanium is known for its high strength, corrosion resistance, and heat transfer properties. See the results of which epoxies performed the best when also considering different processing and operation conditions.
Read the Master Bond results.


One Touch Fasteners slash set-up times

Quick-release One Touch Fasteners from Fixtureworks provide quick and easy locking and unlocking for fixture plates, covers, machine components, and more. These quarter-turn clamping fasteners have clearly visible ON and OFF markings and are ideal for fast-changeover applications and frequent disassembly, providing reliable hold up to 100 lb. Lots of versions available, including standard, retractable, heavy duty, and knob- and button-locking pins.
Learn more and see case study examples.


Desktop Metal qualifies nickel alloy Inconel 625 for 3D printing on Studio System 2

3D-printer maker Desktop Metal has qualified the use of the nickel alloy Inconel 625 (IN625) for its Studio System, an office-friendly metal additive manufacturing system that prints high-performance metal parts in low volumes for pre-production and end-use applications. IN625 is a high-performance alloy known for high levels of strength, temperature resistance, and corrosion resistance.
Read the full article.


6 advanced FDM 3D-printing tips when adding metal parts to your build

Fused Deposition Modeling (FDM) 3D-printing machines use thermoplastic resins and strong, tough materials for real applications. Learn from the experts at TriMech how to prepare for incorporating metal parts such as bushings, hex nuts, roller chain, and rods into FDM builds to create complicated parts that need to stand up to repeated use.
View the TriMech video.


Electromagnetic interference O-rings case study

Specialty Silicone Products (SSP) recently supplied hot vulcanized EMI (electromag-netic interference) O-rings to a company that needed to replace EMI gaskets that had failed EMC testing. EMI O-rings made of electrically conductive silicones combine reliable environmental sealing and broad temperature resistance with proven levels of shielding against EMI. Learn how hot vulcanizing with a conductive adhesive, the joining process that SSP uses, eliminates EMI leakage and a "hard spot" where ends are joined using a non-conductive adhesive.
Read this informative SSP case study.


5 new manufacturing options from Xometry

Get the parts you need made fast and at a great price. Xometry has added five new manufacturing options to their quoting engine: Die Casting, Metal Extrusion, Metal Stamping, Laser Tube Cutting, and Tube Bending. Experts will manually quote these options and work closely with you to ensure the best outcome and success. Get your quote today, and get started on your next metal production order.
Learn more.


Hydrogen power in a bottle for on-the-go use: Army plans to license nanogalvanic aluminum powder discovery

The U.S. Army Research Laboratory's nanogalvanic aluminum powder for hydrogen generation. [U.S. Army photo by David McNally]

 

 

The U.S. Army Research Laboratory plans to license its discovery of a nanogalvanic aluminum powder for hydrogen generation.

Army researchers at Aberdeen Proving Ground in Maryland have developed a novel, structurally stable, aluminum-based nanogalvanic alloy powder that, when combined with water or any water-based liquid, reacts to produce on-demand hydrogen for power generation without a catalyst.

"This powder-based alloy includes material that disrupts the formation of an encapsulating aluminum oxide layer, allowing for the continuous production of hydrogen that can be used at the point of need to power a wide range of devices via fuel cells and internal combustion," said Dr. Anit Giri, a scientist with the lab's Weapons and Materials Research Directorate. "The powder can be easily manufactured to scale, and can be conveniently and safely transported via tablets or vacuum pouches, thus eliminating reliance on high-pressure hydrogen cylinders."

Dr. Anit Giri, a scientist with the U.S. Army Research Laboratory, observes a sample of a unique aluminum nanomaterial powder that reacts with water to produce hydrogen. [U.S. Army photo by David McNally]

 

 

 

 

ARL will be posting a Federal Register Notice and launching a supporting website inviting companies to submit their ideas on how best to commercialize this technology. The laboratory will then select the most appropriate partners and collaborators. Officials said license exclusivity will then be determined.

Researchers said the powders has many advantages, including:

  • Energy and Power Source
  • Stable Alloy Powder
  • Non-Toxic
  • Environmentally Friendly
  • Hydrogen Emitting
  • Manufacture to Scale
  • Easily Transportable

Army researchers discovered the unique properties of the nanopowder while investigating aluminum alloy compositions for other purposes. The researchers, from the lab's Lightweight and Specialty Metals Branch, made the serendipitous discovery that at least one of these compositions can, in the presence of water, spontaneously generate hydrogen -- rapidly and efficiently.

"The researchers have since demonstrated rapid hydrogen generation rates using powder and tablet forms of the alloy," said Branch Chief Robert Dowding. "The hydrogen has been shown to be useful for powering fuel cells and is expected to power internal combustion engines." The researchers are currently taking advantage of the innovation by characterizing the hydrogen generation rates and purity of the gas generated, Dowding said.

Army researcher Anthony J. Roberts inflates a balloon with hydrogen produced from a chemical reaction between water and an aluminum nanomaterial powder discovered at the U.S. Army Research Laboratory at Aberdeen Proving Ground, Maryland. [U.S. Army photo by David McNally]

 

 

 

 

"They are also examining the effects of compositional changes to the alloy and systematic changes in the microstructure of the powders," he said.

Giri said the discovery has many benefits and applications, such as simple manufacturing.

"The powder can be made using current manufacturing techniques from either pure or alloyed aluminum," he said. "The manufacturing process is easily scalable and it is also very fast -- with a 75-percent theoretical hydrogen yield in one minute at standard temperature and pressure, and 100-percent theoretical yield in three minutes."

The nanopowder is also extremely efficient. Giri said 1 kg of powder can generate 4.4 kWh of energy -- enough to power 10 60-W incandescent light bulbs for more than seven hours or the equivalent LED bulbs for over 50 hours.

The material can be in powder or tablet form and be combined with any available water-based liquid to provide hydrogen on demand, at the point of need.

The discovery eliminates reliance on high-pressure cylinders, Giri said.

"It's easy to transport and store via tablets or vacuum-sealed pouches with no inherent inhalation risk," he said. "The powder is also environmentally friendly. Its by-products are stable and non-toxic. Finally, it's a versatile hydrogen source with direct combustion for vehicular power, to use in fuel cells to power any electronic device, and could potentially be used in 3D printing/additive manufacturing to create self-cannibalizing robots/drones."

In order to support a better understanding of the material, the laboratory established a website to showcase details on the technology and a review the process that will culminate in the granting of a patent license(s) around September 2018.

On this website, visitors can register their interest to be contacted about further developments, post general questions, and download background technical information, as well as templates for all the required documents that will be used throughout the process.

For further information, click here.

"The Federal Register announcement is a significant step forward in the transition of power to the Soldier in the field, where it will become available on demand at the point of need," Dowding said.

Source: U.S. Army Research Laboratory

Published July 2018

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