Barrel finishing combines an abrasive media and a compound solution into a finishing container or a barrel by a given ratio together with the work pieces to be finished. The work pieces are polished using the relative kinetic difference of itself, the abrasive media and the compound solution in the container. There are several types of barrel motion including rotary, vibratory, centrifugal disc motion and centrifugal motion (high speed sun-and-planet motion). Type of a barrel varies depending on the type of machine.
The major purposes of finishing include; deburring, radiusing, smoothing, descaling, luster and mirror finishing. A feature of barrel finishing is that more than one objective mentioned above can be obtained in one process.
The best fit for barrel finishing is mass-production and can curtail production costs significantly. Barrel finishing can also be combined with other polishing methods to lower costs.
Applications
Barrel finishing process is employed by such industries as automotive, electronics, industrial equipment, housing equipment, healthcare, sporting equipment, gems, jewelry and daily commodities.
Other Types of Finishing
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Blasting (Sand Blasting/ Dry Honing)
This is the finishing method that removes burrs and scales by spraying blasting abrasives from a nozzle with the force of compressed air to work pieces.
Brushing
This finishing method rubs a work piece to a certain degree of depth with a wheel or cup type brush made of nylon, steel or brass filaments containing abrasives rotating at high speeds.
Belt Finishing
This finishing method rubs a work piece with an endless belt coated with abrasives.
Center-less Buffing
This method of finishing radiuses the surface of a work piece by holding it between multi-layered buffs rotating at a high speed.
Shot Blasting
This is the finishing method to remove large burrs generated in a molding process by shooting fine metal granules (steel balls and grits) with the force of an impeller rotating at a high speed.
Electrolytic polishing
This polishing method melts the surface of a work piece by applying an electrolytic solution and an electric current to work piece.
Magnetic Barrel (Magnetic Polishing)
The permanent magnets or solenoid coils are located under the spinner or around the barrel tub. Work pieces and magnetic media are loaded in the barrel. As the spinner rotates the magnetic field moves, which agitates the magnetic media to achieve the surface finishing.
Buffing
This polishing method is accomplished by rubbing work pieces with a rotating disc-shaped non-woven cloth or layered cotton cloth coated with abrasives.
