Multi-Layer Badge Dampens Vibrations in Cavity Back Iron Golf Club Heads
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Solution Overview
Problem
Cavity back iron golf club heads tend to produce a louder sound when striking a golf ball due to their thinner and more flexible faces, which may not be preferred by all golfers, and existing badges do not adequately address this issue.
Innovation Solution
A multi-layer badge is affixed to the rear surface of the striking face, comprising layers with specific densities and Young's moduli, including a viscoelastic first layer and a stiffer second layer, to attenuate sound and improve damping properties, thereby reducing the acoustic signature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the face of the golf club head is made thinner to increase deflection and distance, then the coefficient of restitution is improved and distance increases, but the acoustic signature becomes louder which is undesirable
Solution Approach 1:
A badge is introduced as an intermediary element between the striking face and the rear of the club head. This badge serves as a mediator that absorbs and dampens vibrations generated during impact, thereby reducing the acoustic signature while allowing the thin face design to maintain its distance-enhancing properties
Solution Approach 2:
The badge is constructed from composite materials with specific damping properties. By using materials with high damping characteristics, the badge effectively absorbs vibration energy from the thin face, reducing the loudness of the acoustic signature while preserving the distance benefits of the thin face design
2Shape
If a badge is added to fill the cavity opening to improve aesthetics, then the cosmetic appeal is improved, but the damping properties are insufficient to adequately reduce the acoustic signature
Solution Approach 1:
The badge utilizes composite materials specifically selected for their damping properties. These materials are engineered to provide both aesthetic appearance and effective vibration damping, thereby simultaneously improving cosmetics and reducing the acoustic signature
Solution Approach 2:
The badge's material parameters are specifically optimized for damping. By changing the material composition and structural parameters of the badge, it achieves effective vibration absorption while maintaining aesthetic appeal, thereby adequately reducing the acoustic signature
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 badge effectively dampens vibrations, enhancing the aesthetic appeal and reducing the loudness of the golf club head, making it more appealing to golfers by altering its acoustic signature.
Implementation Method 1
a viscoelastic first layer and a stiffer second layer, to attenuate sound and improve damping properties
Implementation Method 2
A multi-layer badge is affixed to the rear surface of the striking face, comprising layers with specific densities and Young's moduli
Data Source
AI summary
A golf club head, including a body including a striking face and a perimeter portion extending aft from the striking face, a badge affixed to a rear surface of the striking face, wherein the badge comprises a first layer aft of the striking face, the first layer including a first density, a second layer aft of the first layer, the second layer including a second density, and a third layer aft of the first layer, wherein the third layer comprises a third layer front surface located adjacent the second layer, wherein the first density is less than 2.0 g/cm3, wherein the second density is greater than 2.0 g/cm3.