Multi-Layer Golf Ball Core Cover Design for Amateur Swing
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Solution Overview
Problem
Existing golf balls fail to optimize flight performance and feel at impact for amateur golfers with low to medium head speed, as they do not adequately address the need for improved coefficients of restitution and deformation at specific incident velocities.
Innovation Solution
A golf ball design featuring a core, intermediate layer, and cover that satisfies specific relationships between coefficients of restitution and compressive deformation at various incident velocities, ensuring optimal performance and feel across all golf clubs, with the core and surface hardnesses carefully calibrated to achieve a balance between distance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the golf ball is designed for high head speed performance, then flight performance is improved for fast golfers, but feel at impact becomes too hard for amateur golfers with low to medium head speed
Solution Approach 1:
The patent applies local quality by creating distinct layers with different hardness characteristics - a softer core for low to medium head speed golfers and a harder cover for flight performance. The core has a lower compression rating than the cover, providing a softer feel at impact while the cover maintains aerodynamic performance for flight stability.
Solution Approach 2:
The patent uses composite materials by combining different rubber compounds and layer structures. The multi-layer construction includes a core made of specific rubber composition with certain hardness and elasticity properties, and a cover made of different material with higher hardness, creating a composite structure that balances soft feel with flight performance.
2Use of energy by moving object
If the core hardness is increased to improve flight distance, then ball speed is improved, but feel at impact becomes too hard and loss of energy increases
Solution Approach 1:
The patent applies parameter changes by optimizing the compression rating and hardness of the core within specific ranges. The core compression rating is controlled at 45 to 65 IRX, and the core hardness is maintained at 80 to 95 durometer D, creating optimal energy transfer efficiency that maximizes ball speed while minimizing energy loss through excessive deformation or rebound.
3Ease of manufacture
If the golf ball structure is simplified to reduce manufacturing cost, then ease of manufacture is improved, but flight performance and feel optimization for specific head speed ranges cannot be achieved
Solution Approach 1:
The patent applies segmentation by dividing the golf ball into distinct functional layers - a core layer optimized for low to medium head speed impact characteristics and a cover layer optimized for aerodynamic flight performance. This segmentation allows each layer to be manufactured and optimized independently for its specific function while maintaining overall performance consistency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The golf ball provides excellent flight performance and a soft, solid feel for amateur golfers, even at low to medium head speeds, by optimizing the coefficients of restitution and compressive deformation, thus enhancing distance and durability.
Implementation Method 1
letting LBS, MBS and HBS be the respective coefficients of restitution (COR) for the ball at incident velocities of 35 m/s, 45 m/s and 55 m/s... and BC be the compressive deformation (mm) of the core when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf)
Data Source
AI summary
A golf ball for amateur golfers exhibits excellent flight characteristics when hit by the average golfer and also has a good feel at impact that is both soft and solid. The golf ball includes a core, an intermediate layer and a cover, and has coefficient of restitution and compressive deformation relationships that satisfy specific conditions.