System and method for texturing magnetic data storage disks

Details System and method for texturing magnetic data storage disks System and method for texturing magnetic data storage disks

1992-02-27

1996-01-23

Rose, Robert A.

Abrading

Machine

Rotary tool

451 63, 451 59, 451 60, B24B 2902

Patent

active

054861349

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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Fox, et al; IBM Technical Disclosure Bulletin vol. 26, No. 3B Aug. 1983.

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