Overmolding of actuator E-block by thixotropic or semisolid forg

Details Overmolding of actuator E-block by thixotropic or semisolid forg Overmolding of actuator E-block by thixotropic or semisolid forg

1998-11-18

2000-11-21

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Head mounting

For shifting head between tracks

148549, 75249, 164477, G11B 554, C22F 104, B22F 900, B22D 1100

Patent

active

061511986

ABSTRACT:
An actuator E-block for a rotary data storage device has a number of solid flat arms and flat coil yokes. The arms and yokes are formed from a metal, metal-reinforced metal matrix composites (MMC), ceramic-reinforced MMCs, glasses, ceramics or ceramic composites having a low density metal matrix surrounding reinforcing particles of low density and high specific stiffness. The arms and yokes may be formed as inserts by inexpensive processes such as stamping, blanking or laser scribing. The arm and yoke inserts are placed in a mold and then overmolded with a metal or metal matrix composite E-block body using a thixotropic or semisolid forming process. After molding, these materials and processes form a cost effective, lightweight E-block with a near net shape and enhanced damping and stiffness.

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RD 425065A; Derwent # 1999-559657; IBM; "Actuator E-block . . . Made From . . . Metal Matrix", Sep. 1999.
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