Golf Ball Layered Design for Putting Roll Control
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Solution Overview
Problem
Golf balls with flexible covers often result in unpredictable rolling distances during putting, as the low amplitude of vibration and sound transmitted through the golf club may cause the ball to roll shorter than intended, leading to a phenomenon known as 'short', which is not effectively addressed by existing technologies.
Innovation Solution
A golf ball design featuring a core, a mid layer, and a cover with specific compressive deformation and hardness ratios, where the cover suppresses slip between the club and ball, efficiently converts hitting force into spin, and the mid layer emits moderate vibration, allowing for better control and distance adjustment during putting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible cover is used to improve feel at impact, then the ball rolls shorter than intended during putting, but using a harder cover increases rolling distance control
Solution Approach 1:
The golf ball is divided into multiple layers with different hardness characteristics: a soft core for feel, a mid-layer for transition, and a cover with specific hardness (30-50 Shore D) for controlling roll distance. This segmentation allows each layer to contribute differently to overall performance.
Solution Approach 2:
Different regions of the golf ball have different physical properties optimized for their specific functions. The cover has lower hardness than the core to provide feel, while the mid-layer has intermediate properties to balance the transition. This local differentiation resolves the contradiction between soft feel and roll control.
2Manufacturing precision
If the cover hardness is increased to improve rolling distance control, then controllability upon approach shot decreases
Solution Approach 1:
The ball is segmented into layers where the cover maintains lower hardness (30-50 Shore D) for approach shot controllability, while the mid-layer and core provide the necessary structural support for rolling distance control through their combined deformation characteristics.
Solution Approach 2:
The golf ball uses a composite structure combining materials with different mechanical properties. The cover uses polyurethane or similar materials with specific elasticity, while the core and mid-layer use different formulations to create a composite system that achieves both controllability and roll distance control.
3Speed
If the mid-layer hardness is increased to improve spin rate, then shock transmission to the player increases
Solution Approach 1:
The mid-layer acts as a cushioning element between the hard core and the softer cover. Its intermediate hardness (50-70 Shore D) provides shock absorption before the impact force reaches the player's hand, while still allowing sufficient deformation to generate spin.
Solution Approach 2:
The invention optimizes the hardness parameter of the mid-layer to a specific range (50-70 Shore D) that balances spin generation and shock absorption. This parameter optimization allows the mid-layer to deform sufficiently for spin while dissipating shock energy.
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 excellent controllability and feel during approach shots and allows golfers to easily adjust rolling distances, with improved spin rates and reduced shock transmission, enhancing overall performance and putting accuracy.
Implementation Method 1
the cover suppresses occurrence of a slip between the face of a golf club and the golf ball. Moreover, with the golf ball, force upon hitting is efficiently converted to energy of spin
Implementation Method 2
in putting the golf ball, the mid layer emits moderate vibration or sound
Implementation Method 3
the low amplitude of vibration transmitted to the golf player via the golf club may be the cause of a short
Implementation Method 4
Df1 represents an amount of compressive deformation (mm) of the core, Df2 represents an amount of compressive deformation (mm) of a sphere including the core and the mid layer
Implementation Method 5
force upon hitting is efficiently converted to energy of spin
Data Source
AI summary
A golf ball includes a core, a mid layer, and a cover. A ratio R1 calculated by mathematical formula (1): R1=(Df1−Df2)/(Df2−Df3) is not less than 5.00. A ratio R2 calculated by mathematical formula (2): R2=(T2*H2)/H3 is not less than 2.00. A ratio R3 calculated by mathematical formula (3): R3=D1/T3 is less than 50. In mathematical formulas (1) to (3), Df1 represents an amount of compressive deformation of the core, Df2 represents an amount of compressive deformation of a sphere including the core and the mid layer, Df3 represents an amount of compressive deformation of the golf ball, T2 represents a thickness of the mid layer, H2 represents a hardness of the mid layer, H3 represents a hardness of the cover, D1 represents a diameter of the core, and T3 represents a thickness of the cover.