Cavity Back Iron Insert Structure for Full-Surface Vibration Damping
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Solution Overview
Problem
Current vibrational dampening inserts in cavity back irons are limited in their ability to cover the rear surface of the strike face due to rear walls, restricting their effectiveness and ease of assembly, as they primarily focus on a portion of the surface rather than the entire perimeter region.
Innovation Solution
The introduction of an insert that extends into the perimeter undercut of the cavity back iron, featuring a variable density design with interconnected walls and voids to improve sound and feel, while maintaining or enhancing performance characteristics such as ball speed and spin, and allowing for easier assembly through compressibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a rigid badge is used for vibrational dampening, then the insert provides structural support, but it can only cover a portion of the rear surface due to rear walls limiting placement
Solution Approach 1:
The insert employs a porous or cellular internal structure with interconnected walls and voids, allowing the same external footprint to cover the entire rear surface including perimeter regions. This internal porosity enables the insert to extend coverage without increasing external dimensional complexity
Solution Approach 2:
The insert is divided into interconnected wall segments that form a cellular structure. This segmentation allows the insert to cover the entire rear surface area while maintaining structural integrity through the distributed network of walls rather than requiring a solid monolithic structure
2Reliability
If the insert covers only a portion of the rear surface, then assembly is simpler, but the damping ability is limited
Solution Approach 1:
The insert features variable density with different wall thicknesses and void distributions in different regions. Areas requiring greater dampening have higher density or different cellular configurations, optimizing vibrational control across the entire rear surface including perimeter regions without requiring uniform structure throughout
3Ease of manufacture
If a compressible insert design is used, then ease of assembly is improved, but structural rigidity may be reduced
Solution Approach 1:
The insert utilizes a flexible cellular structure with thin interconnected walls that can compress during assembly to navigate tight tolerances and fit into the cavity, then expand to provide structural support and dampening. This flexible shell structure maintains strength while enabling easier assembly compared to rigid inserts
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 solution effectively reduces peak frequencies during impact, resulting in a softer sound and improved performance by covering the entire rear surface, enhancing the overall feel and sound of the golf club while maintaining or improving ball speed and spin rates.
Implementation Method 1
current badges are typically rigid and abut only to a portion of the rear surface of the strike face due to rear walls limiting their ability to be placed over the entire rear surface. By only covering a portion of the strike face, the insert has limited damping ability.
Data Source
AI summary
Described herein are embodiments of cavity back irons with inserts. In some embodiments, the insert has a plurality of voids. In some embodiments, the voids can have approximately the same size. In other embodiments, the voids can vary in size to create a variable density. The cavity back iron can include an undercut, a lip, or another rear structure. The insert can fill the back cavity and a majority of an undercut, lip, or maintaining feature. In some embodiments, the insert is made up of multiple pieces. In many embodiments, the insert can be press-fit into the cavity. Other embodiments of cavity back irons with inserts are described herein.