Maxtor Corporation

Todd M Morton

Tave Joseph Fruge

Dave Brause

David D Brause

An actuator/coil assembly () is disclosed where two different bonding operations are used. First, a bobbin () is overmolded to a coil (), and a first overmolded part () is overmolded to both the coil () and a fan tail () of the actuator (). The overmolding operation defines one or more adhesive receptacles () in the bobbin () on a perimeter that interfaces with the coil (), and further defines one or more adhesive receptacles () in the first overmolded part () on a perimeter that interfaces with the coil () and that interfaces with the fan tail () of the actuator (). Adhesive () is disposed within these receptacles () to increase the stiffness of the actuator/coil assembly ().

Fixtureless manufacture of bonded actuator/coil assemblies

Positive retention features are provided on an actuator of a magnetic disk drive thereby increasing the structural rigidity of the actuator in attachment of a voice coil to the actuator. The positive retention features are defined by a plurality of protrusions having compound curved shapes including reverse or inward facing edges. The natural tendency of thermoplastic resin to shrink during cooling is used to an advantage in enhancing the rigidity of the connection between the voice coil and actuator body. The compound curved shapes of the positive retention features allows shrinkage of the thermoplastic resin in multiple directions around the features thereby maintaining desired actuator stiffness.

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Longmont, CO, United States of America

Todd M Morton