Auto Manufacturer Moves toward Cleaner AirShot blasting is a method used to clean, strengthen, or polish metal. Almost every industry that uses metal uses shot blasting, including the automotive industry.
During the manufacturing of automobiles, a variety of aluminum parts are needed to produce a light weight, strong, and fuel efficient product. To meet the performance requirements required by the automobile company, several aluminum castings are created. Excess aluminum is removed from the casting by a steel shot blasting process, providing a polished, finished product.
The high pressure spray causes the blast media to break apart on impact, causing the metal or finish coating to become airborne. These irregular sized particles can be as small as 0.5 - 5.0 microns, which are undetectable to the naked eye. In addition to their size, their coarse nature makes them highly abrasive, causing them to fall into the National Fire Protection Association’s (NFPA) explosive dust category.
The challenge in ventilating this type of process is to only collect the nuisance dust and not the steel shot material used in the cleaning process. Also, since aluminum dust is considered an explosive dust, this critical characteristic needs to be addressed.