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Stamper Constructs Machinery to Manufacture Custom Heat Sinks

Heat Sinks

EAST PROVIDENCE, R.I.--In response to a request from a customer, The Evans Company has built machinery on which it is manufacturing formed heat sinks for aerospace use, the company recently announced. Unlike typical extruded heat sinks, the heat sinks are formed out of sheet metal, resulting in thinner sections and lighter weight in a specified metal. They are thin enough to conform to curved or irregular surfaces, according to the company.

Because the heat sinks are machine-formed, Evans can produce thinner cross sections. The company is using 6061 aluminum that is only 0.005-inch thick. Evans has also developed a process to heat treat to the T6 condition while maintaining the formed dimensions. In the T6 condition, aluminum exhibits higher yield strength and thus better structural performance.

The Evans Company, known for small and miniature deep drawn stampings in common and refractory metals, usually manufactures deep drawn and progressive stampings up to 3.5 inches long, with ODs to 6 inches and wall thicknesses 0.003-inch to 0.125-inch. A major manufacturer of precision tantalum parts, the company also supplies products in niobium, molybdenum, titanium, beryllium copper, nickel alloys, Kovar®, clad metals, common metals, and stainless steel. Pete Evans, president of the 80-year-old firm, says that in addition to manufacturing custom parts, the company supports materials selection and design.

"We are eager to build custom machinery for special applications," he said. "The Evans Company started in 1928 with the design of automated drawing equipment for jewelry findings. We are proud to continue that innovative tradition."

In response to a customer request last year, Evans added two hydraulic presses and a 75-ton mechanical press to its extensive assortment of smaller straight-sided, progressive, and transfer presses. The company also has a new CNC turning center and can finish-machine drawn shells to 5 inches long with a 7-inch OD and 0.080-inch wall thickness. "Growing with the customers," Evans said, "is part of the tradition."

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