Fishing Reel Spool Rigidity via Segmented Prepreg Lamination

The spool body is segmented into multiple prepreg sheets (at least three sheets) that are rolled and heat pressed together. By dividing the spool into multiple layers with fibers arranged in different directions, the overall rigidity is enhanced while maintaining weight reduction. The segmentation allows for strategic placement of high-rigidity fiber orientations at critical joints without requiring the entire shell to have uniform heavy construction.

Different regions of the spool body have different fiber orientations tailored to local rigidity requirements. Specifically, at least one prepreg sheet has fibers extending in a radial direction, while another sheet has fibers extending in an axial direction. This local differentiation ensures that joints between the shell, flange, and skirt portions have enhanced rigidity where needed, rather than requiring uniform fiber orientation throughout the entire spool.

The prepreg sheets are pre-impregnated with resin and have fibers pre-oriented in specific directions (radial and axial) before the forming process. This preliminary arrangement ensures that when the sheets are rolled and heat pressed to form angles, the fibers are already positioned to carry loads effectively, preventing breakage during the forming operation and maintaining strength at the angles between shell, flange, and skirt portions.

The spool body is constructed as a composite structure using multiple prepreg sheets with different fiber orientations (radial and axial directions). This composite approach allows the material itself to provide structural strength at the angles, eliminating the need for additional reinforcement that would add weight. The combination of different fiber orientations in the composite creates a synergistic effect that maintains strength during forming and under load.