Shot Blasting Project
详细说明
Shot Blasting
Abrasive blasting, more commonly known as sandblasting, is the operation of forcibly propelling
a stream of abrasive material against a surface under high pressure to smooth a rough surface,
roughen a smooth surface, shape a surface or remove surface contaminants. A pressurised fluid,
typically compressed air, or a centrifugal wheel is used to propel the blasting material (often
called the media). The first abrasive blasting process was patented by Benjamin Chew Tilghman on
18 October 1870.[1]
There are several variants of the process, using various media; some are highly abrasive,
whereas others are milder. The most abrasive are shot blasting (with metal shot) and
sandblasting (with sand). Moderately abrasive variants include glass bead blasting (with glass
beads) and plastic media blasting (PMB) with ground-up plastic stock or walnut shells and
corncobs. Some of these substances can cause anaphylactic shock to both operators and passers by.
[2] A mild version is sodablasting (with baking soda). In addition, there are alternatives that
are barely abrasive or nonabrasive, such as ice blasting and dry-ice blasting.
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