Plastic grinding media – RKX plastic grinding chips
RKX plastic media is preformed plastics, the other workhorse media, are also available in a variety of grades or bodies, with some manufacturers having nine grades while others have as few as three.
This media is formed by bonding abrasives (generally 40-70% by weight) into polyester, usually by casting. After casting, this media is typically pre-tumbled to remove flash. The plastic media is sofer, has a lower density than preformed ceramic media, providesa cusioning effect, and sometimes has a shorter life. It is well suitable for finishing softer metals and fragile parts, achieving pre-plating requirements, and producing smooth finishes as low as 5 micrometers.
During finishing the matrix which is softer than the abrasive, is eroded, leaving the abrasive to perform the desired work, While some users believe it assures parts free of impingement, this is not ture, All the mass finishing processes expert for fixtured or compartmentalized operations allow part-on-part contact. Plastic media can also be produced in a wide variety of desirable shapes. In practice over a decade some shapes go out of favor and new ones emerge.
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