Golf Club Head CG Optimization via Multi-Material Injection
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Solution Overview
Problem
Current golf club head manufacturing techniques fail to optimize the center of gravity (CG) and moment of inertia (MOI) effectively, leading to suboptimal ball trajectory and spin rates.
Innovation Solution
The use of multiple materials, such as steel-based, titanium-based, and tungsten-based materials, in combination with filler materials like rubber and epoxy, to create a golf club head with a hollow body and strategically placed mass portions, allowing for adjustment of the CG and MOI through innovative design features like recessed portions and ports for filler material injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple materials are used to manufacture golf club heads, then the center of gravity (CG) and moment of inertia (MOI) can be optimized, but the device complexity increases
Solution Approach 1:
The patent applies composite materials by combining multiple materials (steel-based, titanium-based, tungsten-based) with different densities and properties to create a golf club head. This allows precise control over CG and MOI by strategically placing materials in specific regions, resolving the contradiction between manufacturing precision and device complexity through material composition rather than structural complexity
Solution Approach 2:
The patent implements local quality by varying material distribution throughout the club head body. Different materials are placed in specific zones (e.g., denser materials near the CG location, lighter materials in other regions) to optimize performance parameters locally, achieving precise CG/MOI control without requiring complex overall structure
2Manufacturing precision
If filler materials are injected into the body to adjust CG and MOI, then ball trajectory and spin rate improve, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by incorporating filler material injection as an integrated step in the manufacturing process. The hollow body is designed with injection ports and internal geometry that facilitate subsequent filler material placement, allowing CG and MOI adjustment to be performed during manufacturing rather than requiring post-production modifications
Solution Approach 2:
The patent utilizes parameter changes by varying the type, amount, and distribution of filler materials injected into the hollow body. Different filler materials with varying densities and viscosities can be selected to achieve specific CG and MOI targets, enabling precise control over ball trajectory and spin rate through material parameter selection rather than structural redesign
Data Source
AI summary
Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are described herein. In one example, a golf club head includes a body portion with a front opening and a back opening, a face portion closing the front opening, and a back cover portion that closes the back opening and includes at least 50% of the total area of the back portion, a first port, and a second port. A first mass portion and a second mass portion engage the first port and the second port to close the first port and a second port, respectively. The first mass portion and the second mass portion each includes a material with a greater density than the material of the body portion and the material of the back cover portion. Other examples and embodiments may be described and claimed.