Golf Ball Dimple Volume and Core Composition for Flight Height Control
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Solution Overview
Problem
Existing golf balls often result in driver shots going out of bounds due to high initial velocity and excessive flying height, which can lead to shots clearing obstacles and entering out-of-bounds areas.
Innovation Solution
A golf ball design comprising a spherical core made from a rubber composition with methacrylic acid or its metal salt as a co-crosslinking agent, combined with an intermediate layer and an outermost cover featuring a plurality of dimples, where the total lower volume of the dimples is 365 mm3 or more and the dimple occupation ratio is 75% or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the golf ball has a fast initial velocity to achieve long drive distance, then the driving distance is improved, but the maximum flying height increases causing the ball to clear obstacles and enter out-of-bounds areas
Solution Approach 1:
The patent changes the physical parameters of the golf ball by controlling the total lower volume of dimples to be 365 mm³ or more and the dimple occupation ratio to be 75% or more. This parameter modification alters the aerodynamic characteristics of the ball, reducing maximum flying height while maintaining initial velocity for long drive distance.
Solution Approach 2:
The patent applies local quality by creating dimples with specific volume and occupation ratio on the ball surface. The dimples are strategically designed to affect local airflow patterns, which collectively reduce the maximum flying height without compromising the overall speed and driving distance performance.
2Object-affected harmful factors
If the dimple volume and occupation ratio are increased to reduce maximum flying height, then the number of out-of-bounds shots is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent establishes specific parameter ranges (total lower volume ≥ 365 mm³, occupation ratio ≥ 75%) that balance the reduction of out-of-bounds shots with manufacturability. These parameter thresholds provide clear manufacturing targets while achieving the desired aerodynamic effect.
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 design achieves a lower maximum flying height on driver shots, reducing the number of shots that go out of bounds by preventing the ball from clearing obstacles.
Implementation Method 1
an outermost cover positioned outside the intermediate layer and having a plurality of dimples formed thereon, wherein the total lower volume Vi of the plurality of dimples is 365 mm3 or more
Data Source
AI summary
An object of the present disclosure is to provide a golf ball that has a low maximum flying height on driver shots by an average golfer. The present disclosure provides a golf ball comprising a spherical core, an intermediate layer and an outermost cover, wherein the spherical core is formed from a rubber composition containing a rubber component, a co-crosslinking agent, and a crosslinking initiator, the co-crosslinking agent contains methacrylic acid and/or a metal salt thereof, a total lower volume Vi (mm3) of the plurality of dimples is 365 mm3 or more, and an occupation ratio of the dimples is 75% or more.