Foam-Filled Vehicle Bunk Panel Assembly for Efficient Manufacturing
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Solution Overview
Problem
Existing methods for manufacturing vehicle bunks are inefficient and costly, lacking a streamlined process for producing high-quality bunks that can be efficiently pivoted between stowed and deployed positions in transit vehicles.
Innovation Solution
A method involving thermoforming, drilling, and assembly processes to create a bunk assembly with a support panel comprising an upper and lower shell, using specialized machinery and adhesives, and incorporating a latching mechanism for secure positioning, along with a foam filling process to enhance durability and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manufacturing methods are used for vehicle bunks, then the process is simple, but the manufacturing efficiency is low and costs are high
Solution Approach 1:
The patent combines multiple manufacturing operations (thermoforming, drilling, foam injection, and assembly) into an integrated manufacturing system. The support panel is thermoformed with integrated cavities that directly receive foam injection, and drilling operations are performed on the same panel structure, eliminating the need for separate manufacturing steps and tooling setups.
Solution Approach 2:
The support panel structure serves multiple functions simultaneously: it provides structural support, contains integrated cavities for foam injection, and incorporates drilling features for hardware attachment. The single thermoformed panel replaces what would traditionally require multiple separate components and assembly steps.
2Ease of manufacture
If traditional manufacturing methods are used for vehicle bunks, then the equipment required is simple, but the manufacturing cost is high
Solution Approach 1:
The manufacturing process is segmented into distinct but integrated phases: thermoforming the support panel with built-in cavities, drilling holes for hardware, injecting foam into the cavities, and final assembly. Each phase uses specialized equipment that performs multiple functions, reducing the total number of separate machines needed compared to traditional methods.
Solution Approach 2:
The patent changes the physical state and properties of materials during manufacturing: thermofoming heats and molds the panel material, foam injection introduces expanding material that cures in place, and drilling creates precise openings. These parameter changes enable a more efficient process that reduces overall manufacturing cost despite using specialized equipment.
3Reliability
If a robust bunk structure is created with support panels and latching mechanisms, then the bunk is stable and secure, but the manufacturing process becomes more complex
Solution Approach 1:
The support panel is pre-formed with integrated cavities and drilled holes during the thermoforming stage, before assembly. The cavities are prepared to receive foam injection, and holes are drilled in precise locations for hardware attachment. This preliminary preparation eliminates the need for complex assembly operations and reduces manufacturing complexity.
Solution Approach 2:
The bunk assembly combines multiple materials: the thermoformed support panel material, the injected foam for structural reinforcement, and hardware materials for latching mechanisms. These composite materials work together to create a stable and secure bunk structure while the integrated manufacturing process keeps complexity manageable.
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 method enables the manufacturing of bunks that are more efficient, cost-effective, and structurally robust, allowing for easy pivoting and secure deployment in transit vehicles, enhancing passenger comfort and safety.
Implementation Method 1
a thermofomer to thermoform an upper shell and a lower shell
Implementation Method 2
an adhesive to attach the upper shell to the lower shell
Implementation Method 3
an expandable foam to fill the support panel
Data Source
AI summary
A method for manufacturing a bunk assembly for a transit vehicle is provided. The method includes forming an upper shell and forming a lower shell. The method further includes installing a frame between the upper shell and the lower shell and joining the upper shell and the lower shell together to form a support panel. The method further includes drilling a fill hole and a vent hole in the lower shell, the vent hole having a first diameter and filling the support panel with foam through the fill hole via the fill hole and such that air contained within the support assembly is vented through the vent hole. The method further includes redrilling the vent hole to a second diameter to form a mount hole, the second diameter being greater than the first diameter and mounting hardware to the support panel at the mounting hole.