Multi-piece Golf Ball Layer Velocity Optimization
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Solution Overview
Problem
Existing golf balls fail to achieve superior distance on shots with utility clubs and irons, while also maintaining good controllability on approach shots, a good feel at impact, and excellent durability.
Innovation Solution
A multi-piece solid golf ball with a core, envelope layer, intermediate layer, and cover, where the initial velocity relationships among these layers satisfy specific conditions, optimizing the hardness profiles and layer thicknesses to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the golf ball is designed for superior distance on shots with utility clubs and irons, then the initial velocity and hardness profile are optimized for distance, but the controllability on approach shots and feel at impact deteriorate
Solution Approach 1:
The golf ball is divided into multiple layers (core, intermediate layer, cover layer) with distinct hardness and velocity characteristics. The core has higher initial velocity for distance, while the cover layer has lower initial velocity for controllability, allowing each layer to independently optimize its function without compromising the others.
Solution Approach 2:
Different regions of the golf ball have different properties: the core region is designed for high initial velocity and distance, while the cover layer region is designed for lower initial velocity, higher spin rate, and better controllability. This local differentiation allows the ball to exhibit both distance and control characteristics simultaneously.
2Speed
If the golf ball is designed for superior distance on shots with utility clubs and irons, then the hardness profile is optimized for distance, but the feel at impact deteriorates
Solution Approach 1:
The golf ball structure separates the distance-generating core from the feel-providing cover layer. The core can be designed with optimal hardness for initial velocity without compromising the cover layer's ability to provide a soft feel at impact, as each layer independently contributes its specific function.
Solution Approach 2:
The core region is optimized for high initial velocity with appropriate hardness, while the cover layer region is optimized for soft feel at impact with lower hardness. This local quality differentiation allows the ball to simultaneously achieve superior distance and pleasant feel without compromise.
3Speed
If the golf ball uses a multilayer construction with optimized surface hardnesses, then the distance on full shots is improved, but the durability to repeated impact deteriorates
Solution Approach 1:
The multilayer construction divides the ball into a core, intermediate layer, and cover layer, each with optimized hardness and velocity characteristics. This segmentation allows the core to provide high initial velocity for distance while the cover layer is specifically designed to absorb repeated impacts, protecting the core and maintaining durability without sacrificing distance performance.
Data Source
AI summary
In a golf ball having a core, an envelope layer, an intermediate layer and a cover, the core is formed of a rubber composition and the envelope layer, the intermediate layer and the cover are each formed of a resin composition. The core, the envelope layer-encased sphere, the intermediate layer-encased sphere and the ball have respective initial velocities which together satisfy the following three conditions:(initial velocity of ball)<(initial velocity of intermediate layer-encased sphere),(initial velocity of intermediate layer-encased sphere)−(initial velocity of envelope layer-encased sphere)≤0.60 m/s, and0.50≤(initial velocity of envelope layer-encased sphere)−(initial velocity of core)≤1.08 m/s.This golf ball can achieve a superior distance on shots with a utility club and with irons, and exhibits a good durability to repeated impact, a good controllability in the short game and a good feel at impact.