Metal Finishing Guide Book

2013

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Bonus savings A modest operation in New Hampshire was able to save thousands of dollars a year by upgrading to a media that, per pound, is much more expensive to purchase. The savings? They realized their hazardous disposal costs were killing them. Media that yielded similar results – with 15 times the service life – was recommended after determining suitability in the lab. Disposal volume plummeted, enabling the blasting operation to become clean and profitable. Optimize your compressed air Loss of production, rework and downtime are all costly – and you may not be aware there's a problem lurking in your compressed air supply. Compressed air for blast systems must be oil-free and "clean and dry" and that usually means a refrigerated air dryer. Moist air is the source of many blasting ills, especially in high humidity when water condenses easily, contaminating media and causing flash rusting. "Economizing" on the pipe diameter to the blast machine and adding other restrictions such as quick disconnect fittings can reduce performance. Air compressors have improved significantly. Consult with your supplier: a compressed air audit may reveal potential savings. Use the correct blast nozzles The right blast nozzle can greatly increase the utility of your machine, and today there are many that offer gains in production. New ergonomic blast guns for manual cabinets are much easier to use1. Fan nozzles provide wide spray. Airinduction nozzles eliminate the blasting "hot spot" that can otherwise warp delicate parts and make for slow, streaky blasting. A variety of side-outlet nozzles reach into or behind difficult-to-access areas. Extra long venturi nozzles have been developed to increase production up to 40% over conventional nozzles when using the same amount of compressed air. In terms of compressed air consumption, it can be very costly to leave a worn nozzle in place. Be sure to use a durable, high performance nozzle – cheap disposables need frequent replacement, can lead to premature blast hose replacement, tax your compressor, and drive up labor and energy costs. Extra labor costs can be incurred by not using a large enough nozzle in the first place2 – re-evaluate and realign your CFM consumption to Figure 1. Simply upgrading to a blast gun designed for productivity your throughput needs. and ergonomics yields big bang for the buck3. 11

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