Phase Change Adhesive Sleeve for Arrow Vane Attachment
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Solution Overview
Problem
Existing methods for securing archery vanes to arrow shafts are time-consuming and expensive, and conventional adhesives fail to withstand the forces applied during arrow removal, leading to separation of the fletching system from the shaft, while images on the arrow suffer from frictional wear during flight.
Innovation Solution
A phase change adhesive is positioned between the inner surface of the sleeve and the outer surface of the arrow shaft, providing high bonding strength that can be adjusted by temperature to facilitate easy removal and replacement of the fletching system, and an image is applied to the inner surface of the sleeve to avoid frictional wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional adhesive is used to secure the sleeve to the arrow shaft, then the bonding strength is initially sufficient, but the adhesive cannot withstand the forces applied when removing the arrow from the target, causing the fletching system to separate from the shaft
Solution Approach 1:
The patent applies a phase change adhesive that transitions from a solid state (providing strong bonding during flight) to a liquid state (allowing easy removal) when heated. This parameter change resolves the contradiction by enabling the adhesive to provide both strong bonding strength during use and ease of removal during maintenance, eliminating the need to choose between these conflicting requirements.
Solution Approach 2:
The adhesive's bonding characteristics dynamically change based on temperature conditions. During normal arrow use, the adhesive remains solid and provides strong bonding. When removal is needed, heating transforms the adhesive to a liquid state, dynamically adjusting the bonding strength to enable easy separation of the fletching system from the shaft.
2Illumination intensity
If the image is applied to the exterior surface of the arrow, then it is visible, but it experiences frictional wear during flight and target penetration
Solution Approach 1:
The patent applies the image to the interior surface of the sleeve, nesting the image within the protective enclosure of the sleeve. This resolves the contradiction by keeping the image visible (when the sleeve is transparent or translucent) while protecting it from frictional wear, as the sleeve material shields the image from contact with the target and environmental factors during flight.
Solution Approach 2:
The sleeve acts as an intermediary between the image and the external environment. By applying the image to the interior surface of the sleeve rather than directly to the arrow shaft, the sleeve material serves as a protective mediator that prevents frictional wear while still allowing the image to be visible from the exterior.
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 phase change adhesive ensures secure attachment and easy removal of the fletching system, while the internal image avoids frictional wear, enhancing the durability and convenience of arrow maintenance.
Implementation Method 1
A phase change adhesive or another suitable phase change material that is positioned between an inner surface of the sleeve and an outer surface of the arrow shaft. The phase change adhesive can provide a relatively high bonding strength or a sufficient bond between the sleeve and the arrow shaft, particularly when a surrounding environment is within a set range of temperatures.
Implementation Method 2
When removing or changing a fletching system, the phase change adhesive can be heated, for example, to above a set range of temperatures, to lessen the bonding strength of the adhesive between the sleeve and the arrow shaft.
Data Source
AI summary
A method for attaching a vane with respect to a shaft of an arrow or a crossbow bolt. The vane is attached to a tube or sleeve that is positionable over an outer surface of the shaft. The sleeve has an inner surface and the shaft has an outer surface. In an attached position of the vane with respect to the shaft, an adhesive is sprayed onto the inner surface or is otherwise positioned between and contacts at least a portion of the inner surface of the sleeve and at least a portion of the outer surface of the shaft.