Multi-layer Core Golf Ball Hardness Gradient
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Solution Overview
Problem
Current golf ball designs with multi-layer cores lack a very high positive hardness gradient, which affects their performance and durability.
Innovation Solution
A golf ball construction featuring a multi-layer core with a thermoset inner core layer, a thermoplastic intermediate core layer, and a thermoset outer core layer, providing a high positive hardness gradient through specific Shore C hardness values and thicknesses, enhancing the ball's overall performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-layer core with high positive hardness gradient is implemented, then durability and performance are improved, but device complexity increases
Solution Approach 1:
The core is divided into multiple distinct layers (inner core layer, intermediate core layer, outer core layer) with different material compositions and hardness properties. This segmentation allows each layer to contribute specific functions - the inner layer provides softness for feel, the intermediate layer creates the hardness gradient, and the outer layer provides durability, thereby improving overall reliability while managing complexity through functional specialization.
Solution Approach 2:
Different regions of the core are assigned different material properties and hardness values. The inner core layer has lower hardness for comfort, the intermediate layer has transitional hardness to create the gradient effect, and the outer core layer has higher hardness for durability. This local differentiation of properties optimizes performance in each region while collectively improving overall ball durability.
2Reliability
If specific Shore C hardness values and thicknesses are optimized, then performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies particular Shore C hardness ranges for each layer (inner layer: 30-50, intermediate layer: 40-60, outer layer: 50-70) and thickness ranges (inner layer: 0.3-0.7 inches, intermediate layer: 0.1-0.3 inches, outer layer: 0.2-0.4 inches). By defining these parameter ranges, the invention balances performance optimization with manufacturability, allowing some variation while maintaining the essential hardness gradient function.
Data Source
AI summary
Golf balls comprising a multi-layer core and a cover are disclosed. The multi-layer core has a very high positive hardness gradient and comprises at least three layers, including at least one thermoset layer and at least one thermoplastic layer.