Originally Published MPMN June 2005

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Microwave Plasma ProcessHeat-Treats Metals

The technology operates at atmospheric pressure in small portable systems

Using microwave-absorbing plasma created with almost any gas, a technology rapidly heats parts and controls arcing. Using AtmoPlas from Dana Corp. (Toledo, OH), parts are surrounded with the plasma and confined within a ceramic-walled cavity that is transparent to microwaves. As the plasma absorbs the microwaves the temperature of the plasma rises and parts heat rapidly...

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Drying Systems Improve Productionof Hydrophilic Foams

Materials are heated and dried evenly and quickly

Foam-drying systems apply radio waves to foam webs or buns up to 4 ft thick at a frequency of 40.68 MHz. This process rapidly removes water without the quality control problems associated with conventional drying methods. Those problems include surface discoloration, cupping caused by nonuniform shrinkage, and surface hardening...

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Films Offer Alternative to Injection-Molded Plastics and Coatings

Thermoformed products provide conformal electrical insulation

Films with gauges less than 0.001 in. thick are available for applications that require mobility, small size, and good functionality. Welch Fluorocarbon (Dover, NH) has begun producing the products on its latest generation of custom thermoforming machines. Increasingly, mobile electronics include a battery, which has forced manufacturers to search for new materials to provide electrical insulation and protection between components and harsh user environments...

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