Rigid Intermediate Fastening Element with Curved Hooks for Vibration Resistance

The patent changes the physical parameter of plate rigidity from flexible to substantially rigid. This allows the plate to maintain its shape and provide stable support for hooks during injection moulding without requiring flexibility for ejection. The rigid plate structure prevents the progressive peeling that occurs with flexible plates under vibration, thereby maintaining fastening reliability while enabling manufacture through specialised moulds.

The patent introduces curved elements specifically in the hook region to facilitate mould design and hook ejection. The curvature is localized to the hook area rather than the entire plate, allowing the plate to remain substantially rigid overall while providing the necessary geometric features for manufacturing. This resolves the contradiction by maintaining plate rigidity for reliability while incorporating localized curvature for ease of manufacture.

The patent segments the mould into specialized sections: a base section for forming the rigid plate and a movable hook-forming section for creating hooks. This segmentation allows the rigid plate to be manufactured in a single mould cycle while the movable section facilitates hook ejection. The segmented mould design enables single-mould production of rigid plate structures that would otherwise be difficult to manufacture.

The patent employs nested mould sections where the hook-forming section is positioned within or integrated with the base section. This nesting allows the complex rigid plate structure with integrated hooks to be formed in a single mould operation, reducing manufacturing complexity despite the rigid plate requirement. The nested design enables multi-functional mould usage for producing the entire fastening element in one cycle.