Golf Club Head Internal Composite Weighting for Precise CG Tuning
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Solution Overview
Problem
Manufacturing variances in golf club performance due to excess materials and difficulty in adjusting the center of gravity (CG) using lightweight materials, with external weights having adverse effects and limited fine-tuning capabilities.
Innovation Solution
Introducing a composite of a chemical adhesive constituent and a weight constituent into the interior of the golf club head, utilizing a hot melt adhesive with variable viscosity and magnetic materials to secure and position the weight constituent accurately within the club head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If external weights are used to adjust the center of gravity, then the CG can be adjusted, but the club head size increases and aesthetic appearance deteriorates
Solution Approach 1:
The weight constituent is nested within the adhesive constituent, which is then injected into the cavity of the club head. This nested structure allows the weight to be concealed inside the club head rather than attached externally, maintaining aesthetic appearance while enabling CG adjustment.
Solution Approach 2:
The adhesive constituent is introduced in a flowable state that allows it to penetrate and fill the cavity, creating an integrated structure where the weight is embedded within the adhesive matrix, eliminating the need for external weight attachments.
2Ease of manufacture
If lightweight materials are used to manufacture the club head, then manufacturing cost is reduced, but the ability to adjust center of gravity deteriorates
Solution Approach 1:
The viscosity of the adhesive constituent is changed by temperature control during injection, allowing it to be flowable during injection for easy manufacture, then solidify afterward to securely hold the weight constituent for precise CG adjustment.
Solution Approach 2:
The combination of adhesive constituent and weight constituent creates a composite structure that integrates weight adjustment capability into the lightweight club head design, maintaining both ease of manufacture and CG adjustment precision.
3Ease of manufacture
If the adhesive constituent is introduced in a flowable state, then injection into the cavity is easier, but positioning precision of the weight constituent deteriorates
Solution Approach 1:
The viscosity parameter of the adhesive is dynamically changed: high flowability during injection for ease of manufacture, then solidification to lock the weight in precise position, achieving both easy injection and precise positioning.
Solution Approach 2:
The mechanical injection process is supplemented by magnetic field application to manipulate the magnetic material within the adhesive, enabling precise positioning of the weight constituent without complex mechanical positioning mechanisms.
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
Enables precise adjustment of the CG and enhances club performance by securely fixing the weight constituent, improving flight characteristics and reducing manufacturing inconsistencies.
Implementation Method 1
introducing the composite when the adhesive constituent is in a substantially flowable state
Implementation Method 2
the adhesive constituent includes a hot melt adhesive
Implementation Method 3
applying a magnetic force to the composite
Implementation Method 4
the weight constituent includes a magnetic material
Implementation Method 5
applying a heat energy to the composite
Implementation Method 6
the heat energy includes at least one of convection, conduction, induction, and ultrasound
Implementation Method 7
the heat energy includes at least one of convection, conduction, induction, and ultrasound
Data Source
AI summary
A golf club head is manufactured to form a cavity where the striking face of the golf club is secured to the sole and upper portion of the golf club head. A weighted composite is manipulated into a predetermined location within the cavity. The composite contains an adhesive which secures the composite within the cavity.