Fixed abrasive polishing method and apparatus

Details Fixed abrasive polishing method and apparatus Fixed abrasive polishing method and apparatus

1981-05-04

1983-07-19

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51118, 51395, B24B 100

Patent

active

043936288

ABSTRACT:
The disclosure is directed to a method and apparatus for superfinishing magnetic disk substrates using a non-friable polishing pad including a high density polyurethane foam binder in which at least 50 percent by weight of classified hard particles are retained. Polishing occurs by rotating the pad against the surface to be ultrafinished in the presence of a water soluable liquid vehicle maintaining a minimum pressure of 5 pounds per square inch at a rotational speed that achieves the desired aggressiveness of the polishing media. The method and apparatus contemplate both the ultrafinishing of newly prepared substrate disks and the restoring of previously coated disks to a ultrafinished substrate condition without producing substances or conditions toxic to the ecology or the operator.

REFERENCES:
patent: 3500589 (1970-03-01), Ellege
patent: 3721046 (1973-03-01), Dunn
patent: 4111666 (1978-09-01), Kalbow
patent: 4179852 (1979-12-01), Barnett

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