Golf Ball Multi-Layer Hardness Gradient for Curving Trajectory
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Solution Overview
Problem
Golf balls fail to curve significantly and roll excessively after landing, making it difficult to achieve a precise draw or fade shot.
Innovation Solution
A golf ball design comprising a spherical core, an intermediate layer, and an outermost cover with specific hardness differences and dimple volumes, optimized to create significant side spin and lift force, resulting in a longer flight duration and reduced rolling distance upon landing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the golf ball is designed to create significant side spin for draw or fade shots, then the curving performance is improved, but the rolling distance after landing becomes excessively long
Solution Approach 1:
The patent applies parameter changes by precisely controlling the hardness difference between the core center and surface (S = Hs - Ho), the intermediate layer hardness (Hm) and thickness (Tm), the cover hardness (Hc) and thickness (Tc), and the dimple lower volume (Vi). These parameter optimizations create a balanced performance where the golf ball generates sufficient side spin while reducing rolling distance through improved landing characteristics
Solution Approach 2:
The patent employs composite materials by constructing the golf ball with multiple layers having different material properties: a spherical core with specific hardness gradient, an intermediate layer with controlled hardness and thickness, and an outermost cover with optimized properties. This multi-layer composite structure enables simultaneous optimization of spin generation and landing behavior
2Force
If the golf ball structure is optimized for curving performance, then the side spin is increased, but the flight duration may be reduced
Solution Approach 1:
The patent resolves this contradiction through parameter optimization, specifically by controlling the relationship between the hardness difference S, intermediate layer properties (Hm×Tm), cover properties (Hc×Tc), and dimple lower volume Vi. This balanced parameter set ensures both adequate flight duration and sufficient side spin generation
3Force
If the core hardness difference S is increased to improve spin characteristics, then the side spin is enhanced, but the overall ball performance may become unbalanced
Solution Approach 1:
The patent maintains performance balance through coordinated parameter changes across all layers. The hardness difference S of the core is optimized in conjunction with the intermediate layer hardness Hm and thickness Tm, cover hardness Hc and thickness Tc, and dimple lower volume Vi. This systematic parameter optimization ensures that enhancing side spin does not compromise overall ball performance stability
Solution Approach 2:
The multi-layer composite structure distributes the functional requirements across different layers, allowing the core to provide spin generation while the intermediate layer and cover maintain structural integrity and balanced performance 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 and short rolling distance after landing, enhancing the control and precision of draw or fade shots by balancing spin and lift forces.
Implementation Method 1
the golf ball... has a great lift force, resulting in a long flight duration
Implementation Method 2
The golf ball according to the present disclosure... can create a great side spin
Data Source
AI summary
An object of the present disclosure is to provide a golf ball bending in a great amplitude and rolling a short distance after landing. The present disclosure provides a golf ball comprising a spherical core, an intermediate layer, and an outermost cover having a plurality of dimples formed thereon, wherein when a center hardness (Shore C hardness) of the spherical core is Ho, a surface hardness (Shore C hardness) of the spherical core is Hs, a hardness difference S=Hs−Ho, a material hardness (Shore D hardness) of the intermediate layer is Hm, a thickness of the intermediate layer is Tm (mm), a material hardness (Shore D hardness) of the outermost cover is Hc, a thickness of the outermost cover is Tc (mm), and a total lower volume of the plurality of dimples is Vi (mm3), [S×(Hm×Tm+Hc×Tc)]/(Tm+Tc)×Vi/1000<230 is satisfied.