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| A rotor consists of three main sections : a rotary section with blades that blow abrasive media, |
| a feeding section for supplying abrasive media to the rotor, and a cover section composing the |
| rotor itself. The rotor blades, which are worn as well as the nozzles, consist of special cast |
| iron and heat treated parts. |
| Some rotors use ceramic blades. The number of blades is normally 8 but sometimes 2 to 4. |
| Each blade is an insertion/extraction type for replacement when worn out. The entire set of blades |
| should be replaced at the same time because the weight difference from abrasion causes |
| vibration and noise. |
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| Other components are as follows : a deflector (distributor) to change the injection angle of |
| the abrasive media, a shutter gate to limit the feeding of abrasive media, a cover for the whole unit, |
| protection plates for the internal surfaces of the rotor, a disk for positioning the blades, |
| a rotary shaft bearing, etc. |
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| A separator works like a cyclone for an air blasting. It separates foreign matter mixed into the |
| injected abrasive media and the media that gets smaller after being broken. Various separation |
| methods are available but selection by wind force is basically used. |
| (The following characteristics are utilized with the suction force from a dust collector : |
| the lighter weight of abrasive media, the farther media are drawn, and the heavier weight, |
| the earlier media falls before drawn into the distance.) |
| In addition, the following selection techniques are efficiently combined for this process. For a |
| trommel type (sometimes called a rotary screen type), a wire gauze mesh attached to the |
| rotary drum separates the abrasive media based on particle sizes, and then the media are separated |
| based on their specific gravity by the suction force from the dust collector. |
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| For a vibration screen type, a vibrating mesh separates the media. The media are then further |
| separated based on specific gravity by suction force as well. Also, a magnetic type, a vibrating |
| screen type, etc., are available. Select the appropriate type of abrasive media for separation. |
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