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CASTING INNOVATIONS


Reducing Maintenance, Downtime in Finishing Farrar Corp., an iron casting facility


in Norwich, Kan., recently installed a drum blast machine from Roberts Sinto Corp., Lansing, Mich., to replace a conventional tumblast unit. Sintokogio, the parent company of


Roberts Sinto, is introducing advanced designs and abrasive blast technology to the North American market. Te first unit Roberts Sinto introduced with the Sinto Surface Treatment


(SST) is the CND Drum Blast. Tese models are capable of cleaning a broader range of castings, including small, thin parts. By design, they require significantly lower mainte- nance than conventional tumble-type blast machines. Farrar’s CNDR-22 Drum Blast


machine reportedly features smooth load/unload capabilities, highly efficient finishing due to oscillation


during the blast cycle, and a zero pinch design that virtually elimi- nates jams in the mill. “Te equipment it replaced was


undersized and poorly constructed, which resulted in high maintenance costs and a lot of downtime,” said CEO and chairman Joe E. Farrar. Roberts Sinto helped Farrar’s staff through the initial startup of the au- tomatic controls, and the new equip- ment virtually eliminated downtime and maintenance issues. “We have less part jamming in the machine and during unloading,” he said. “We also have less part damage during shot blasting.” Farrar specializes in ductile and austempered ductile iron (ADI) castings, providing full service casting design, patterns, CNC machining and milling. The plant currently is designed to handle up to 70 tons of melt per day in two shifts and is anticipating an expan- sion to 120 tons of melt per day on a two-shift basis. “We pour ductile iron castings


ranging in weight from 1 lb. to about 75 lbs. and everything goes through the same [drum blast] machine,” said Farrar. Production runs range from 100 to 100,000 castings. The CND series features a


hydraulic bucket loader, floor- mounted double-lip separator and a no-leak drum design. It can be configured with a 6, 10, 14 or 22 cu. ft. drum blast. Its increased speed is due to an improved direct drive wheel.


The SST division also is bring-


ing its complete line of spinner hanger monorail machines to the U.S. market. Like the CND series, they are designed for easy mainte- nance. Sinto Shake Blast continu- ous, in-line machines feature a mill with a unique shape, as well as strategically placed multiple lower power wheels, to facilitate uniform cleaning and reduce casting dam-


The new Roberts Sinto drum blast machine reduced maintenance costs and increased uptime for Farrar Corp.


44 | MODERN CASTING April 2013


age during tumbling. Visit www.robertssinto.com for more information.


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