Golf Club Head IRM Sole Structure for Face Deflection Durability
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Solution Overview
Problem
Conventional golf club heads struggle to increase strike face deflection without compromising club head durability, as features that enhance deflection often lead to increased stress and reduced durability.
Innovation Solution
A golf club head design featuring a 3D-printed faceplate with an Impact Response Modulator (IRM) that includes a casing with an aperture and insert, strategically weakening the sole to enhance deflection while maintaining durability, using high-strength materials like C300 or C350 steel, which are 3D printed to allow complex geometries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If features such as slits, slots, openings, channels, or flexures are added to increase strike face deflection, then ball speed and energy transfer are improved, but stresses in adjacent areas increase and club head durability is reduced
Solution Approach 1:
The patent applies local quality by creating a localized stress management zone through the aperture and insert structure in the sole. This allows the strike face to have enhanced deflection characteristics in specific areas while maintaining structural integrity in other regions. The insert material is selected to have different mechanical properties than the surrounding club head material, creating a gradient that manages stress distribution locally rather than uniformly across the entire club head.
Solution Approach 2:
The patent utilizes composite materials by incorporating an insert made of a material different from the club head material. This composite structure allows the combination of materials with complementary properties: the club head material provides overall structural strength while the insert material provides controlled flexibility and stress management. This composite approach enables simultaneous achievement of high deflection and high durability that would be impossible with a single material.
2Force
If the sole is weakened to increase deflection, then energy transfer to the ball is improved, but the structural integrity and longevity of the club head are compromised
Solution Approach 1:
The patent applies parameter changes by carefully controlling the aperture dimensions, insert material properties, and insert geometry to achieve optimal stress management. By adjusting these parameters, the design allows sufficient sole flexure for high energy transfer while preventing excessive weakening that would compromise longevity. The insert acts as a parameter-controlled element that fine-tunes the balance between flexibility and strength.
Solution Approach 2:
The insert serves as an intermediary element between the sole and the interior cavity. It mediates the stress distribution by providing a controlled interface that allows the sole to flex while transferring loads to the more rigid club head structure. This intermediary structure prevents direct stress concentration that would occur with simple openings, thereby protecting the club head's long-term reliability while still enabling the desired deflection for energy transfer.
3Force
If complex geometries are implemented to optimize deflection patterns, then ball flight performance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies segmentation by dividing the club head into distinct functional zones: the strike face region, the sole region with aperture and insert, and the body region. This segmentation allows each zone to be optimized independently for its specific function while simplifying the manufacturing process. The insert itself can be manufactured separately and then integrated into the club head, breaking down a potentially complex monolithic geometry into manageable components that can be produced using standard manufacturing techniques.
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 design increases strike face deflection, improving ball speed and spin rate without compromising club head durability, enabling more piercing ball flights and increased carry distance.
Implementation Method 1
The strike face of a golf club head deflects upon impact with a golf ball to impart ball flight characteristics such as ball speed, launch angle, and spin rate. More deflection will increase energy transfer between the club head and the golf ball at impact, thereby increasing ball speed.
Implementation Method 2
The IRM further comprises an insert disposed within the aperture and formed of a flexible, polymeric material. The insert is configured to increase flexibility of the sole and improve strike face deflection.
Implementation Method 3
In some embodiments, the faceplate is formed of a high-strength material, such as C300 or C350 steel. The faceplate can be a monolithic component that forms at least a portion of the strike face and comprises a sole return that forms both the casing and a forward portion of the sole.
Implementation Method 4
Features that increase strike face deflection, however, often increase resulting stresses in the area adjacent said features, thereby reducing club head durability. The forward portion of the sole separates the strike face from the casing, reducing stress in the casing walls.
Data Source
AI summary
Golf club heads have an Impact Response Modulator disposed in the sole to improve ball flight characteristics. The Impact Response Modulator includes a casing with a plurality of casing walls that form an aperture therebetween. The club head further comprises a faceplate with a sole return that integrally forms the entire casing. The faceplate structurally reinforces the IRM by forming the casing walls out of high-strength material, thereby improving faceplate deflection while maintaining sufficient durability.