Low cost high performance injection molded hard drive top cover
Provided herein is a low cost high performance light weight hard drive cover that is injection molded. The hard drive top cover has a flange portion that applies pressure to an elastomeric seal preventing ingress of moisture dust and other contaminants into the sensitive components. The flange portion is reinforced with a plurality of metallic strips that are placed between pressure application locations embedded within the polymer flange. The viscoelastic creep response of the polymer flange does not contribute to relaxation of pressure on the elastomeric seal due to the presence of the metallic reinforcement strips. The metallic reinforcement strips may have a convex curvature between pressure application locations. The metallic reinforcement strip may have apertures for passage of injection molded polymer creating delamination free intimate bond between the polymer in the flange and the metallic reinforcement strip.
1. A hard drive comprising:
an injection molded polymeric top cover ;
the top cover comprising a body portion encasing a hard drive mechanism and a flange portion;
said flange portion contacting an elastomeric seal element squeezed against a corresponding flange on each side edge of a base member of the hard drive by a plurality of pressure application means;
said flange portion having an injection molded polymer and a convex shape contour metallic reinforcement portion embedded within said injection molded polymer and extended along a longitudinal direction of said flange portion such that vibrational energy is transmitted to the elastomeric seal element, said metallic reinforcement portion having a plurality of apertures for passage of said injection molded polymer to create rivet-like securing features, thereby preventing delamination of the metallic reinforcement portion from adjacent injection molded polymer during pressure application to the elastomeric seal element;
whereby the pressure on said elastomeric seal element is maintained without viscoelastic relaxation of the flange portion.
2. The hard drive of claim 1 , wherein the pressure application means is a plurality of threaded screw connections.
3. The hard drive of claim 1 , wherein the pressure application means is a plurality of clamps.
4. The hard drive of claim 1 , wherein the top cover is injection molded with a polymer selected from Lexan EXL, VECTRA or other suitable injection molding polymers.
5. The hard drive of claim 1 , wherein said metallic reinforcement portion is a continuous strip.
6. The hard drive of claim 1 , wherein said metallic reinforcement portion is a plurality of discrete reinforcement strips.
7. The hard drive of claim 1 , wherein said metallic reinforcement portion has a convex curvature between pressure application locations thereby applying increased contact pressure on said elastomeric seal element.
8. The hard drive of claim 1 , wherein said top cover has a metalized coating preventing static accumulation providing EMI and ESD shielding.
9. The hard drive of claim 8 , wherein said metalized coating is an electroplated coating, an electroless plated coating or an evaporated metal coating.