The Dexmet Blog
The latest in engineering and manufacturing news, trends and insights straight from the Dexmet experts.
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For the last quarter century, the Renaissance in manufacturing has depended on innovative and superior designs that let producers excel in terms of product quality, delivery and performance. The pressure on manufacturers to continue this positive trend will almost certainly increase as global competition becomes more intense and raw materials more costly.
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In 2009, three researchers, Dimas Smith from the Universidad Francisco de Miranda, Carlos Graciano and Gabriela Martinez from the Universidad Simon Bolivar published a paper that discuss the use of expanded metal in engineering applications. While some of the applications discussed were widely known, we appreciated the fact that the paper highlighted the advancements made by the use of expanded metal in applications from several different market sectors.
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Dexmet is well-known as a manufacturer of expanded materials but do you also know that we support the efforts being carried on by professional organizations in emerging applications, here and abroad.
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There is an old saying that imitation is the best form of flattery and while it may be true in some cases, in the world of manufacturing that is not always the case.
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This is one of the more common questions that we are asked. Customers are primarily concerned with adhesion and surface resistance. Does the surface resistance increase with increased tarnish levels? Will epoxy adhere to a tarnished copper surface? To try and provide an answer, we undertook some elementary evaluations of copper samples with varying levels of tarnish identified using the L*a*b* color space coordinates. For those unfamiliar with the L*a*b* system, the short answer is that every color can be defined in terms of 3 numbers. The first number, “L”, is for lightness which ranges from 0-100, with 0 being black and 100 being white. Everything else is shades of gray. The second number, “a”, is either positive (Red) or negative (green). The third number, “b”, is either positive (yellow) or negative (blue). That is it in a nutshell. All shades of copper and its tarnish can be defined in this way.
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Dexmet has brought the capability of Wire EDM (Electrical Discharge Machining) technology in-house to quicken the development process and provide better turnaround time to its customers. The new capability will allow Dexmet to quickly generate custom expanding dies for application specific expanded products or provide custom cut geometries out of already expanded materials.
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Wallingford, CT – (November 29, 2011) – When Dexmet Corporation, a manufacturer of precision expanded metal foils (MicroGrid®) and polymer films, wanted to add a high performance polymer to its PolyGrid® portfolio, it chose one of the highest regarded performing thermoplastics in the world, Victrex APTIV® film made with VICTREX® PEEK™ polymer. Utilizing specifically designed proprietary equipment and processes, Dexmet performs an expansion procedure on the high performance polymer to produce a diamond configured, open area mesh product for filtration applications. Providing all of the outstanding properties of VICTREX PEEK polymer in a versatile thin film format, APTIV film was selected for its superior combination of mechanical strength, chemical and high temperature resistance. “While it technically falls under our high temperature PolyGrid product line,” said Ken Burtt, VP of Sales and Marketing at Dexmet, “APTIV film provides much more than just high temperature capabilities. It also has great chemical compatibility as well as mechanical strength that may be required for certain filter applications in harsh environments making it more of a ‘high performance’ PolyGrid material.”
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Dexmet now offers a new process variation of corrugating their precision expanded materials. This process variation was developed for high-performance applications that require the expanded material to be much thicker or larger, that require more surface area and better cross-directional flow.
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