Polymer Utility Vault Welding for Faster Seam Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing underground utility vaults require labor-intensive assembly methods using mechanical fasteners and sealants, which are time-consuming and require multiple tools, increasing production costs and time.
Innovation Solution
The vault halves are joined using a hot plate welding process that eliminates mechanical fasteners by melting sacrificial pads to create a continuous bond, with optional ultrasonic or vibration welding for securing accessories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If mechanical fasteners and sealants are used to join vault halves, then connection strength is achieved, but assembly time and labor costs increase
Solution Approach 1:
The patent replaces mechanical fastening systems (nuts, bolts, rivets) with a thermal welding process. A hot plate is used to melt the sacrificial pads and polymer material at the joint interface, creating a fused bond between vault halves. This substitution of mechanical assembly with thermal processing eliminates the need for fasteners and sealants while reducing assembly time and labor requirements
2Strength
If mechanical fasteners and sealants are used to join vault halves, then connection strength is achieved, but device complexity and number of parts increase
Solution Approach 1:
The patent merges multiple separate components (fasteners, sealants, joints) into a single integrated welded structure. The sacrificial pads are molded directly into the vault halves during manufacturing, and the welding process fuses these pads together with the polymer material to create a unified joint. This consolidation eliminates the need for separate fasteners and sealant applications, reducing part inventory and assembly complexity
3Strength
If mechanical fasteners and sealants are used to join vault halves, then connection strength is achieved, but labor intensity and tool requirements increase
Solution Approach 1:
The patent replaces manual mechanical assembly operations with an automated thermal welding process. The hot plate welding system applies controlled heat and pressure to fuse the sacrificial pads and polymer material, eliminating the need for workers to manually install fasteners and apply sealants. This reduces labor intensity and minimizes the variety of tools required for assembly
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 welding process reduces assembly time and labor costs while providing a connection strength equal to or better than mechanical fasteners, enhancing production efficiency.
Implementation Method 1
heat from a plate is applied to the sacrificial pad at a prescribed temperature for a specific time
Implementation Method 2
sacrificial pads that when heated, melt and fuse together
Implementation Method 3
the two surfaces to be joined are forced together under a predetermined pressure for a specified time to complete the joint
Implementation Method 4
ultrasonic welding, vibration welding or robotically controlled plastic welding could be used to weld the seams
Data Source
AI summary
A utilities enclosure comprising a grade level vault adapted for installation below ground and having an upper opening facing an interior region for containing at least a below-ground utility service, the grade level vault is formed in two halves comprising a first half and a second half, wherein each of the first half and the second half have an edge wall on opposite spaced apart end walls, each edge wall having a sacrificial pad extending outwardly therefrom which when heated and pressed together under pressure with a sacrificial pad on an opposite edge wall welds the first half and the second half together to form a seam.