Golf Ball Natural Rubber Core and Dimple Volume Optimization
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Solution Overview
Problem
Existing golf balls struggle to curve significantly on short iron shots and control rolling distance after landing, leading to inaccuracies in shot placement.
Innovation Solution
A golf ball design featuring a spherical core made from a rubber composition with natural rubber, methacrylic acid, and a crosslinking initiator, combined with an outermost cover having a specific dimple pattern that optimizes spin and lift characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the golf ball is designed to create high side spin for curving shots, then the curving performance improves, but the rolling distance after landing becomes too long and the ball cannot be stopped at the aimed point
Solution Approach 1:
The patent applies parameter changes by optimizing the dimple volume (total lower volume Vi < 365 mm³) and occupation ratio (≥75%) to control aerodynamic forces. These parameter adjustments create a balance where sufficient side spin is generated for curving shots while lift and drag characteristics are optimized to reduce rolling distance after landing, allowing the ball to stop at the aimed point
2Duration of action of moving object
If the dimple volume is increased to enhance lift and flight duration, then the curving extent increases, but the rolling distance after landing also increases
Solution Approach 1:
The patent optimizes the dimple parameters by setting the total lower volume Vi to less than 365 mm³ and the occupation ratio to 75% or more. This specific parameter combination achieves optimal flight duration for enhanced curving while simultaneously controlling the lift and drag characteristics to minimize rolling distance after landing
3Stability of the object's composition
If the occupation ratio of dimples is increased to improve aerodynamic characteristics, then the flight stability improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent sets the occupation ratio to 75% or more, which provides optimal aerodynamic stability during flight. While this parameter requires precise manufacturing, the specific threshold value allows for practical implementation while achieving the desired flight stability characteristics
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 achieves a large curvature on short iron shots and rolls a short distance after landing, enhancing accuracy and control.
Implementation Method 1
If the rubber component forming the spherical core contains the natural rubber, the velocity of the golf ball when landing decreases, and the rolling distance can be shortened
Implementation Method 2
the golf ball... has a great lift force and an increased flight duration
Implementation Method 3
a total lower volume Vi (mm3) of the plurality of dimples is less than 365 mm3, and an occupation ratio of the dimples... is 75% or more
Data Source
AI summary
An object of the present disclosure is to provide a golf ball that bends in a great amplitude on short iron shots and rolls in a short distance after landing. The present disclosure provides a golf ball comprising a spherical core, one or more intermediate layer positioned outside the spherical core, and an outermost cover positioned outside the intermediate layer and having a plurality of dimples formed thereon, wherein the spherical core is formed from a rubber composition containing a rubber component, a co-crosslinking agent, and a crosslinking initiator, the rubber component contains a natural rubber, 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 less than 365 mm3, and an occupation ratio of the dimples is 75% or more.