February 26, 2019 Volume 15 Issue 08

Mechanical News & Products

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Key factors for ball screw applications

Learn the six key factors that should be considered when specifying ball screw assemblies in motion control applications. PCB Linear gathered a panel of experts in the field of linear motion to concentrate on this important topic -- particularly when it comes to the company's new miniature ball screw product line. Learn about precision and accuracy, orientation, speed and acceleration, duty cycle, linear motion travel, and load capacity. Podcast available too.
Read the PCB Linear blog.


3D printer uses pellet extrusion system instead of filament

The latest addition to 3D Systems' industry-leading portfolio of EXT Titan Pellet systems is the EXT 800 Titan Pellet. With a build volume of 800 x 600 x 800 mm, this thermoplastics 3D printer harnesses the speed, reliability, and efficiency of the company's large-format pellet systems in a more compact unit with lower upfront investment. Use this machine to fabricate more modestly sized functional prototypes, tooling, fixtures, sand casting patterns, thermoforming molds, and end-use parts. Markedly faster than competing FFF and FDM printers, and up to 10X reduced material costs compared to filaments.
Learn more.


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.


World's first current-carrying fastening technology

PEM® eConnect™ current-carrying pins from Penn-Engineering provide superior electrical connections in applications that demand high performance from internal components, such as automotive electronics. This first-to-market tech provides repeatable, consistent electrical joints and superior installation unmatched by traditional fastening methods. Features include quick and secure automated installation, no hot spots or poor conductivity, and captivation options that include self-clinching and broaching styles.
Learn more about eConnect pins.


New flat quarter-turn clamping fastener

IMAO Fixtureworks has expanded its One-Touch Fastener lineup to include a new quarter-turn clamping fastener that features an innovative flat design and is ideal for clamping in limited spaces. The QCFC flat quarter-turn fastener features a recessed body that protrudes only 2 mm from the mounted surface, a knob that rests flush inside the body, visible ON and OFF markings for safety, and an audible click when fully turned to clamped or unclamped position.
Learn more.


Bellows and disc couplings with higher torque capacity

Ruland Manufacturing now offers bellows and double disc couplings with bore sizes up to 1-3/4 in. or 45 mm for use in systems with torque up to 1,400 in.-lb (158 Nm). High-torque applications in precision semiconductor, solar, conveyor, and factory automation applications often use these shaft sizes. Ruland disc and bellows couplings accommodate all forms of misalignment, are zero-backlash, and have a balanced design for reduced vibration at speeds up to 10,000 rpm.
Learn more.


Simplify your designs with slewing ring bearings

According to Kaydon Bearings, "A slewing ring bearing has rolling elements designed to create a reactive moment within the bearing's dimensions envelope to oppose applied (overturning) moment load," so you can use one bearing instead of two, reducing the height requirements, and even improve performance. Slewing ring bearings can also simplify a drive system by utilizing gear teeth on the inner or outer race. Learn all about slewing ring bearings in this informative article.
Read the Kaydon whitepaper.


Jet valve for ultra-small dispensing

DELO's DELO-DOT PN5 LV pneumatic jet valve is designed for micro-dispensing low-viscosity adhesives and other media in miniaturized applications. Thanks to its compact design, it also requires very little space to install in production systems. Interchangeable nozzles with different diameters and a flexible, adjustable plunger stroke ensure precise and reliable applications at different droplet sizes. Volumes of as low as 1 nl can be achieved, which corresponds to droplet diameters of 250 µm or less.
Learn more.


Stainless steel constant-torque flush-mount hinge

Southco has introduced a flush-mount version of its popular and durable E6 constant-torque hinge. Its low-profile, corrosion-resistant package makes it an ideal solution for maximizing security, longevity, and aesthetics. It offers high torque for demanding applications while maintaining its low profile. Lots of uses.
Learn more.


Claw vacuum pump for industrial applications

Vacuum expert Leybold has added a new model to its proven CLAWVAC dry claw vacuum pump series: the CLAWVAC CP B. This innovative, rough vacuum pump, designed for robust processes including food processing, material handling, and environmental industries, is powerful, energy efficient, and easy to clean. The intuitive handling of this unit is mainly due to its functional design, which features a pair of claws that rotate in the cylinder with no contact or wear. Its separate gearbox prevents oil contamination. The design ensures short downtimes and long service intervals: 20,000 hr between oil changes and up to 48,000 hr between general overhauls.
Learn more.


DualVee linear guides and tracks used in warehousing

See how Bishop-Wisecarver's DualVee® motion tech can add huge benefits to warehousing operations. This video highlights two applications: a manual storage and retrieval system and an automated storage and retrieval system of long aerospace-grade carbon fiber in sub-zero temps. Patented DualVee guides and tracks keep operations running smoothly.
View the video.


Build-to-order knobs and hand hardware

Rogan Corp.'s innovative use of two-shot plastic injection and insert molding has been providing customers with high-quality plastic clamping knobs, levers, and control knobs for almost 90 years. Rogan offers concurrent engineering, product design, and assistance in material selection to ensure customer satisfaction for standard or customized parts, with a focus on cost optimization and on-time delivery. Custom colors, markings, decorative inlays, or engineered materials to meet special requirements, such as adding extra strength or utilizing flame-retardant material, are all offered.
Learn more.


Slewing ring bearing made of wood and plastic

The PRT-02-30-WPC slewing ring bearing is another step forward by igus toward integrating renewable raw materials into industrial production. Made of 50% wood and 50% high-performance plastics, the cost-effective and lubrication-free slewing ring bearing balances strength and durability with a proven low CO2 footprint. The materials incorporate solid lubricants, making the new slewing ring bearing smooth running and maintenance-free.
Learn more.


Flex Locators for quick fixture changeover

Flex Locators from Fixtureworks are designed for quick changeover of small and large fixtures, automation components, and more. They are ideal for applications that require frequent disassembly, providing excellent repeatability for locating and clamping in a single operation. Manual and pneumatic versions are available. Just turn the handle, knob, or screw!
View the video.


Copper foam -- so many advantages

Copper foam from Goodfellow combines the outstanding thermal conductivity of copper with the structural benefits of a metal foam. These features are of particular interest to design engineers working in the fields of medical products and devices, defense systems and manned flight, power generation, and the manufacture of semiconductor devices. This product has a true skeletal structure with no voids, inclusions, or entrapments. A perennial favorite of Designfax readers.
Learn more.


New super-tough-to-mimic chemical fingerprint aims to combat counterfeit goods, can be verified on smartphone

Researchers in Denmark tested a new anti-conterfeiting system by producing tags consisting of QR-codes printed on paper and sprayed with transparent ink containing various microparticles. [Credit: Thomas Just Srensen]

 

 

 

 

Many of us have come home with a new designer bag, watch, or other merchandise only to suspect or discover that it was a fake. More ominously, people die from counterfeit drugs on a daily basis. Globally, consumer counterfeit imports are worth just short of a half-a-trillion dollars annually. The trade is growing, has spread to most industries, and counterfeiters always seem to be at least one step ahead of manufacturers. As such, it is tough for consumers to feel entirely secure about their purchases.

In response, two researchers from the University of Copenhagen's Nano-Science Center have developed what they are deeming a 100 percent pirate-safe labelling system, where individual items receive a label, a so-called "tag," that corresponds with a unique fingerprint. After nearly 10,000 tests, the researchers have proved that their method works.

"You can put it on a wine bottle, a gold watch, a painting -- whatever. The label needn't be larger than a comma. And, it is impossible to copy because the probability that two items share the same fingerprint is nil," says UCPH researcher and associate professor Thomas Just Srensen, who along with fellow researcher Riikka Arppe-Tabbara has developed the anti-counterfeiting system that they are able to confidently refer to as "the world's safest."

Transparent ink as a fingerprint
The fingerprint, or "tag," consists of a bit of transparent ink containing various microparticles, sprayed upon a bar code on paper, for example. Just as a handful of sand thrown over a surface would, the particles form a random, completely unique pattern of tiny white dots when applied. As there is no chance of creating identical patterns using this method, it is impossible to copy.

Because the ink can be sprayed over any type of bar code and onto many types of materials, the tags are inexpensive to mass-produce. The system works in such a way that each product leaving a factory receives its own fingerprint, which is then registered in a database.

Consumers can check using their phones
Counterfeit safety isn't the only smart thing about this system. Purchasers can validate their product using an ordinary smartphone that, by way of an app, scans an item's fingerprint and checks for a matching database image.

"When purchasing pharmaceuticals online, you have no way of knowing whether what you bought might have been produced in a Ghanaian sweatshop. Today, consumers are not able to check for themselves whether an item is genuine or not. They must trust every step of the production and supply chain. Our system provides every step in this process with equal access to the system," says Srensen.

During their nearly 10,000 tests, which included various types of mobile phones handled by a variety of users, the researchers encountered zero false positives. The researchers also tested the system together with companies that produce packaging and labels for everything from pain relievers and bottles of wine, to sneakers and tins of biscuits.

The researchers tested the system, based on PUF technology (physical unclonable function), by producing 9,720 tags consisting of QR codes printed on plain paper and sprayed with transparent ink. Each tag was photographed with a mobile phone to create an image database. The images were then scanned with other mobile phones to see if they matched. The results:

  • There was a false match in 0 percent of cases.
  • There was a positive match in 76 percent of cases.
  • In the remaining cases, the photo was either out of focus or the tag was dirty, thus requiring a new image before a match could be made. The researchers say this error will be remediated by software.

The University of Copenhagen has taken out a patent on the system, which is now only missing the software component. The researchers expect the app to be completed over the course of the year. The result has been published in the journal ACS Applied Materials & Interfaces.

Source: University of Copenhagen

Published February 2019

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