Blowoff for transmission die castings

Third Quarter 2008 Pneumatic systems & components

A newly designed transmission pan presented a myriad of cleaning problems for the die-caster. This was due to the configuration which included channels and blind holes as well as smooth surfaces. A shaped air pattern was required for cleaning purposes. No single blowoff product would fit the need. An assortment of open copper tubes and drilled pipes were considered, but rejected as too noisy and too expensive to operate. A blower was not an option due to the high purchase price, expensive maintenance costs and maintenance downtime.

With help from ETEST application engineers, the company created a cleaning system incorporating a variety of Exair blowoff products. Two High Velocity Air Jets (model 6013), with their confined airstream, cleared the blind holes while two Super Air Amplifiers (model 120022 51 mm) cleared the channels. One Super Air Knife was positioned to blow out the casting’s underside.

There was no doubt that the casting could have been cleaned just as well by hooking up a bunch of copper tubes and throwing huge quantities of air at it, but what would the running costs have been? Exair makes a variety of blowoff products to suit applications requiring different air stream profiles. The Exair products operate at a fraction of the air consumption and noise levels associated with traditional blowoff methods.

For more information contact Rodney Bradley, ETEST, +27 (0)31 702 8302, [email protected], www.etest.co.za

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