Multi-Layered Golf Ball Core With Structural Inserts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a continuing need for improved core constructions in golf balls that provide good flight distance and spin control, particularly with multi-layered core structures featuring a low-density inner core made of a foam composition and a non-continuous outer core layer with specific gravity and hardness gradients.
Innovation Solution
A golf ball design featuring a core assembly with a foamed polyurethane or ethylene acid copolymer inner core and a non-continuous outer core layer, which has a specific gravity greater than the inner core and a positive hardness gradient, providing a multi-layered core construction with specific gravities and mass densities for enhanced flight distance and spin control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a low-density foam inner core is used, then flight distance is improved, but spin control deteriorates
Solution Approach 1:
The core is divided into multiple layers with different densities and properties: a low-density foam inner core for distance and a higher-density outer core layer for spin control. This segmentation allows each layer to optimize for its specific function while working together as an integrated system.
Solution Approach 2:
Different regions of the core have different physical properties - the inner core has low density and high resiliency for distance, while the outer core layer has higher density and appropriate hardness for spin control. This local differentiation of properties resolves the contradiction between distance and spin control.
2Reliability
If a multi-layered core structure with hardness gradients is implemented, then performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs systematic parameter changes across core layers - specific gravity, hardness, and thickness are carefully controlled to create optimal performance. The outer core layer has specific gravity of 1.05-1.30 and Shore C hardness of 70-95, while the inner foam core has lower density, creating performance optimization through parameter gradients.
Solution Approach 2:
The core combines different material types - a foam material for the inner core and a thermoplastic or thermoset polymer for the outer core layer. This composite structure allows each material to contribute its advantageous properties while maintaining manufacturability through established molding techniques.
Data Source
AI summary
Multi-layered, golf balls having a core made of a foamed composition are provided. The core preferably has a foam inner core (center) and surrounding thermoset or thermoplastic outer core layer. The core also includes a structural insert such as, for example, a solid shell, perforated shell, a lattice or mesh, or a central hub with extending arms, and the like. The core layers have different hardness gradients and specific gravity values. The ball further includes a cover having at least one layer. By adjusting the respective specific gravity values of the core layers, the Moment of Inertia (MOI) of the ball can be increased or decreased. In one embodiment, the ball has generally good flight distance and low spin rate.