Carbon Fiber Arrow Shaft Transfer Layer for Pattern Visibility
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Solution Overview
Problem
Conventional arrow shafts face issues with deformation and breakage due to the archer's paradox phenomenon, and the reinforcement with carbon fibers often results in a reduced or faded visual pattern on the surface layer, increasing material costs and production costs.
Innovation Solution
A carbon fiber arrow shaft with a transfer layer formed on a hollow straight tube, featuring a camouflage layer and multiple transfer layers to enhance visibility, including a resin layer with an adhesive resin, film layers, and a backing agent, which are applied to create a bright and patterned design that stands out against the carbon fiber background.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If carbon fiber sheets are used to reinforce the arrow shaft, then the strength and spine of the arrow shaft is improved, but the visual pattern of the surface layer becomes reduced or faded
Solution Approach 1:
A transfer layer is introduced as an intermediary between the carbon fiber reinforcement layer and the outer surface. This transfer layer contains a bright background color (white, yellow, or orange) that transfers onto the carbon fiber sheet, making the carbon fiber pattern visible while maintaining the structural reinforcement benefits of the carbon fiber.
Solution Approach 2:
The patent applies color changes by introducing a bright background color layer that contrasts with the dark carbon fiber. The transfer layer contains pigments or dyes that transfer a bright color onto the carbon fiber sheet, transforming the appearance from faded/dark to bright and visible.
2Stability of the object's composition
If the spine of the arrow shaft is increased to improve flight stability, then the arrow flies straight and deformation is reduced, but material costs and production costs increase
Solution Approach 1:
The patent applies local quality by concentrating the carbon fiber reinforcement specifically in the middle portion of the arrow shaft where the spine is needed for flight stability, rather than uniformly reinforcing the entire shaft. The transfer layer is also selectively applied to highlight this reinforcement area.
3Strength
If multiple layers are laminated to improve strength distribution, then the arrow shaft can withstand different external forces at different positions, but the manufacturing complexity increases
Solution Approach 1:
The patent merges multiple functions into a single transfer layer that simultaneously provides visual contrast, pattern definition, and surface finishing. This consolidates what would otherwise require multiple separate manufacturing steps into one integrated process.
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 improves the visibility of the carbon fiber pattern while maintaining strength and reducing material costs by dispersing forces and enhancing the arrow's flight stability, thus addressing the paradox phenomenon and material visibility issues.
Implementation Method 1
a resin layer may be formed on at least one surface of the camouflage layer and the transfer layer. the resin layer may include an adhesive resin at 40 to 50 wt %
Data Source
AI summary
The present invention provides an arrow shaft including a carbon fiber sheet having a transfer layer formed thereon, wherein the carbon fiber sheet is formed to extend in one direction and includes a plurality of carbon fiber layers in which a camouflage layer is formed on at least a part of an outermost layer thereof, and at least one transfer layer is formed on one surface of at least one of the carbon fiber layer and the camouflage layer.