Preformed 3D Game Ball Panels for Delamination Resistance
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Solution Overview
Problem
Existing game balls face issues with delamination of component layers and inhomogeneous elastic properties due to high mechanical loads and stress from inflated bladders, leading to unpredictable behavior and reduced durability.
Innovation Solution
The method involves preforming a top layer and one or more backing materials into three-dimensional shapes matching the ball's surface, which are then interconnected to minimize overstretching and enhance delamination resistance, resulting in more homogeneous elastic properties and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If panels are made larger to reduce the number of seams, then productivity and environmental stability improve, but mechanical stress and strain on panels increase causing shape deviations
Solution Approach 1:
The panels are preformed into a three-dimensional shape corresponding to the ball surface before being mounted on the bladder. This preliminary shaping action allows the panels to better accommodate the curved surface, reducing stress and strain during inflation while maintaining larger panel sizes with fewer seams
Solution Approach 2:
The panels are given a three-dimensional preformed shape that corresponds to the curved surface of the ball. This curvature adaptation reduces the stress concentration that would occur with flat panels forced onto a spherical surface, enabling larger panels without excessive mechanical stress
2Shape
If high mechanical loads are applied to inflate the bladder, then the ball achieves proper shape and tension, but delamination of component layers occurs
Solution Approach 1:
The panels are preformed before mounting to distribute mechanical loads more evenly across the panel surfaces. This preliminary preparation reduces stress concentration at critical points during inflation, preventing delamination while achieving proper ball shape and tension
Solution Approach 2:
The mechanical properties of the panels are optimized through material selection and preforming processes that enhance their ability to withstand inflation pressures. The preformed three-dimensional shape changes the stress distribution parameters, reducing peak stresses that cause delamination
3Ease of manufacture
If hand-sewing or lamination techniques are used to assemble panels, then ball structure is formed, but manufacturing complexity and costs increase
Solution Approach 1:
The ball construction is segmented into modular components: preformed panels with integrated reinforcement layers and cushioning materials. This segmentation allows each panel to be manufactured independently with standardized attachment mechanisms, simplifying the overall assembly process while maintaining structural integrity
Solution Approach 2:
Multiple functions are merged into the panel structure itself: the panels incorporate reinforcement layers and cushioning materials during preforming, eliminating the need for separate hand-sewing or lamination steps. The panels are designed with integrated attachment features that simplify assembly to basic mounting operations
Data Source
AI summary
A method of manufacturing a multi-layer outer panel for a game ball includes three-dimensionally forming a top layer of an outer panel, as well as one or more backing materials disposed underneath the top layer, into a shape substantially corresponding to the surface of the ball. Multi-layer outer panels are then attached to or interconnected to surround an inflatable bladder, thereby producing a game ball while minimizing overstretching of the outer material or the backing material and improving resistance of the outer panels to delamination.