MecWash Systems’ Midi fully automatic, self-contained aqueous cleaning system is designed to meet the cleanliness and inspection standards required by aerospace applications. The system’s centralized layout includes a standard-sized cleaning chamber measuring 65" × 110" × 89", and the wash chamber can be extended to 60" for very long components. The single-chamber rotational cleaning system features degassed ultrasonic, immersion, and spray wash and rinse, as well as hot air and vacuum dry for complex components.
The wash chamber can be configured with hundreds of high-volume jet nozzles which penetrate and saturate the workload at a rate of 130 gpm. According to MecWash, the full rotation of the workload at 2 to 10 rpm exposes all surfaces to the wash and rinse solutions to ensure effective cleaning, draining and drying. Alternately, delicate components can be cleaned with an oscillation program setting which gently tips the components from side to side.
For complex components with high cleanliness requirements, the degassed ultrasonic wash process is followed by a flood and spray wash, an ultrasonic rinse, a flood and spray rinse, and a high-velocity, hot-air dry cycle. If necessary, a vacuum dry cycle can also be used to pull water out of blind holes and long machine passages. Total cycle times range from 3 to 20 min., depending on the specific components.
The aqueous technology cleans without solvents or emissions and is said to be effective for large and small components, including those with complex geometries or that require special fixturing, as well as standard-size baskets that can hold high volumes of components per cleaning cycle. The aqueous chemicals are formulated with rust inhibition to prevent corrosion as long as two weeks after cleaning.
Palletized parts are transferred from a five-axis, high-pressure waterjet station to a cleaning station via linear motor to enable fast, automated finishing.
In an effort to prevent field paint failures, OEMs can no longer accept parts with the oxide buildup. A mechanical means of removal such as hand buffing or grit blasting is commonly practiced. However, these time-consuming and often labor-intensive processes can represent a substantial expense, and they can also introduce inconsistencies.
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