Multi-layer Core Golf Ball with Non-uniform Thickness
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Solution Overview
Problem
Current golf ball designs with multi-layer cores lack optimal performance in terms of hardness gradient and coefficient of restitution, particularly in achieving a balance between compression and spin rate, which affects the ball's flight characteristics.
Innovation Solution
A golf ball construction featuring a multi-layer core comprising a thermoset inner core, a thermoplastic intermediate core with non-uniform thickness, and a thermoset outer core, along with a cover, which allows for a specific hardness gradient and improved coefficient of restitution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-layer core with uniform thickness is used, then the manufacturing process is simpler, but the hardness gradient and coefficient of restitution are not optimized
Solution Approach 1:
The patent applies local quality by creating a non-uniform thickness layer where the thickness varies at different locations. The first and second non-uniform thickness layers have different thickness distributions, with the first layer being thicker in certain regions and the second layer compensating in other regions. This localized variation in thickness optimizes the hardness gradient and coefficient of restitution without requiring complex manufacturing processes.
2Use of energy by moving object
If compression is increased to improve energy transfer, then spin rate increases excessively, affecting flight characteristics
Solution Approach 1:
The patent utilizes parameter changes by varying the thickness of core layers to optimize the balance between compression and spin rate. The non-uniform thickness distribution allows different regions of the core to have different compression characteristics, enabling improved energy transfer while controlling spin rate to maintain optimal flight characteristics.
Data Source
AI summary
Golf balls comprising a multi-layer core and a cover are disclosed. The multi-layer core comprises at least three layers, including at least one thermoset layer and at least one thermoplastic layer. At least one core layer has a plurality of projections disposed thereon.