Overmolded Fiberglass Fence Post for Fast Wire Attachment
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Solution Overview
Problem
Existing fence post solutions for electric fencing systems face challenges such as time-consuming installation, difficulty in securing wires, and susceptibility to movement and damage, particularly with wooden and steel posts, and lack of lateral resistance in fiberglass posts.
Innovation Solution
A fibre-reinforced plastics post with an overmold layer featuring external attachment locating features and stress relief structures, providing stability, ease of wire attachment, and resistance to UV degradation, along with a foot design for secure grounding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wooden posts are used for fencing, then the posts can be easily obtained and installed, but the installation process is time-consuming and requires additional insulators and fasteners that may cause tracking issues
Solution Approach 1:
The patent combines the post body, insulator, and wire attachment features into a single integrated fibreglass post structure. The post includes molded-in attachment features such as recesses, protrusions, and slots that directly secure wires without requiring separate insulators or fasteners, thereby reducing installation steps and time
Solution Approach 2:
The post is designed with self-contained attachment mechanisms where the fibreglass body itself provides both structural support and electrical insulation. The molded-in features automatically perform the functions of separate insulators and fasteners, making the system self-sufficient and eliminating the need for additional components
2Strength
If steel posts are used for fencing, then the posts provide strong structural support, but they require additional plastic insulators that are difficult to attach and may break or pull through
Solution Approach 1:
The patent employs fibreglass as a composite material that combines the high strength properties of steel with the electrical insulation properties of plastic. The fibreglass post maintains structural integrity while inherently providing electrical isolation, eliminating the need for separate insulator components
Solution Approach 2:
The patent extracts the insulation function from separate plastic insulator components and integrates it directly into the post material itself. The fibreglass post inherently provides both mechanical strength and electrical insulation, removing the need for additional insulator parts that are prone to failure
3Strength
If fibreglass posts are used for fencing, then the posts are light and strong, but they are very smooth and difficult to attach wires to
Solution Approach 1:
The patent applies local quality by maintaining the smooth fibreglass surface for most of the post body while introducing specific localized attachment features such as molded-in recesses, protrusions, and slots at predetermined locations. These localized features provide wire attachment points without compromising the overall smooth surface and structural integrity of the post
4Device complexity
If permanently molded wire connection features are used on fibreglass posts, then the wire attachment is integrated into the post, but the features cannot be replaced if broken and the post lacks lateral resistance
Solution Approach 1:
The patent segments the wire attachment features as separate attachable components that can be independently replaced. The post includes attachment features such as clips or brackets that can be detached and reattached to the fibreglass body, allowing replacement of damaged attachment features without replacing the entire post
Data Source
AI summary
A fence system, post, and method of manufacture are herein disclosed. The post includes a shaft, and an overmold layer extending at least a portion of a length of the shaft. The overmold layer includes a plurality of external attachment locating features for selectively securing wire locating attachments at predetermined locations along the length of the shaft. The fence system includes a plurality of the posts and a plurality of wire locating attachments configured to be attached to the external attachment locating features of the posts.