Metal Finishing Guide Book


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• • • • Inline: belt or roller conveyor, pinch belt, train tracks. Tumbelt, batch and basket blasters. Lathe-style, either enclosed in a cabinet, or open with a vacuum-blast work-head. Custom modifications to better match the cabinet to the part or process, such as tilting turntables, feed-through iris orifice, etc. Blast efficiently Sometimes you just need a blast cabinet on steroids, and that calls for direct-pressure blasting, wheel blasting, or any one of several dynamic approaches to blast prep Figure 4. A simple automated blast machine for ID and OD blasting on a wide range of part sizes keeps (equipment, media, training, etc.). this job shop blasting in the fast lane. Machine has Each has limitations to consider, multiple vertically oscillating guns and PLC controls. A but for covering a lot of tough crane slot with powered turntable facilitates material handling. It is shown set up for ID blasting on a jet ground efficiently, they save labor engine burner can13. like no other. For instance, those who upgrade to direct-pressure often find a day's worth of blasting done by morning break. It might be time to audit your operations, call in your blasting expert and re-evaluate, using their local test lab. Less can be more A New England machine shop blasted a forged part several times during its routing, and they had picked up a well worn multi-gun automatic blast cabinet as well as two inexpensive blast cabinets for the task. But blasting was still taking too much time. Although they were using an appropriate media, the equipment was inadequate. All of these machines were replaced with a new, centrally-located direct-pressure blast cabinet and a single, well-trained operator. Floor space was reclaimed and the hours spent blasting reduced significantly. Maintaining one machine that was wear-protected from the start became easy to manage. Automate it In air blast and wet blast systems, automation often means moving multiple nozzles along the profile of the part, maintaining the optimal stand-off distance and angle of incidence. Nozzles may be fixed – to blast moving parts, attached to linear oscillator or robotic arm, or arrayed in "whirlybird" fashion. When you eliminate bottlenecks, you may find yourself with lot of extra capacity. That could leave you seeking additional, profitable blasting work. 15

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