Abrading – Abrading process – Abradant supplying
Patent
1994-04-28
1996-02-13
Rose, Robert A.
Abrading
Abrading process
Abradant supplying
451446, B24B 5702
Patent
active
054908094
ABSTRACT:
In the texturing unit of this invention a data storage disk is gripped between a pair of opposed, counter-rotating cylindrical abrasive mandrels, which are covered with soft, porous pads. The frictional force between the disk and the pads raises the edge of the disk against a pair of driven rollers which impart a rotational motion to the disk. A texture pattern of uniform grooves, having controlled peak heights and valley depths, is formed simultaneously on both sides of the disk. A system for delivering an abrasive slurry to the pads includes a closed loop in which the slurry is recirculated and a dispense section of that loop, from which a blast of pressurized air periodically expels the slurry through applicators and onto the pads. The continuous recirculation of the slurry prevents settling.
A unique feature is that the groove length may be controlled by adjusting the ratio between the rotational speeds of the disk and mandrels. The groove pattern is primarily circular but a radial component may be added by varying the position at which the pads contact the surfaces of the disk.
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Jones Oliver D.
Stephens Donald E.
Oliver Design, Inc.
Rose Robert A.
Steuber David E.
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