Expanded foam-filled building panel
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Solution Overview
Problem
Existing methods for manufacturing building panels with foam insulation lack efficiency in ensuring consistent foam thickness and structural integrity, as they do not effectively control the expansion of expandable polymers within the panel cavities.
Innovation Solution
A method involving a multi-panel consolidation device that applies a compressive force to constrain the expansion of expandable polymers within cavities defined by a frame, ensuring stable foam formation and bonding to the frame, using a system that includes a base, shelves, and a hydraulic system to manage the expansion and curing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If expandable polymer is injected into panel cavities without constraint, then foam fills the cavity, but foam thickness is inconsistent and structural integrity is compromised
Solution Approach 1:
The consolidation device is divided into multiple shelves that can be independently positioned and adjusted. Each shelf can apply localized compressive force to specific panels, allowing precise control over foam expansion in different regions. This segmentation enables consistent foam thickness across multiple panels while maintaining a modular device structure that isn't overly complex.
Solution Approach 2:
The consolidation device employs movable shelves with adjustable positioning mechanisms that can dynamically adapt to different panel configurations and foam expansion requirements. The shelves can be moved to apply compressive force at optimal times during the foam expansion and curing process, ensuring consistent foam thickness without requiring a rigid, overly complex fixed structure.
2Manufacturing precision
If compressive force is applied during foam expansion, then foam thickness is controlled, but energy consumption increases
Solution Approach 1:
The hydraulic system applies compressive force in periodic cycles rather than continuously. Compressive force is applied at key stages: initially to constrain foam expansion and ensure thickness control, then released during curing to allow foam stabilization, and reapplied if needed. This periodic action reduces overall energy consumption compared to continuous compression while maintaining precise foam thickness control.
Solution Approach 2:
The hydraulic system dynamically adjusts the magnitude and duration of compressive force based on foam expansion characteristics and curing progress. By changing pressure parameters and timing sequences, the system optimizes energy consumption while maintaining consistent foam thickness. The system adapts compression parameters to match the specific requirements of different foam types and panel configurations.
3Productivity
If multiple panels are consolidated simultaneously, then production efficiency increases, but control over individual panel foam quality becomes more difficult
Solution Approach 1:
The consolidation device features multiple independently controllable shelves, each capable of handling and applying compressive force to individual panels. This segmentation allows each panel to receive customized compressive force and curing conditions while still being processed simultaneously with other panels, ensuring consistent foam quality across all panels without compromising production efficiency.
Solution Approach 2:
Each shelf and its associated hydraulic system can be independently adjusted to provide localized compressive force and curing conditions tailored to specific panel requirements. This local quality control ensures that each panel achieves optimal foam quality while multiple panels are consolidated simultaneously, maintaining both productivity and reliability.
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
This method ensures consistent foam thickness with a tolerance of less than 2 mm, enhancing the structural integrity and insulation quality of building panels by controlling the expansion and curing of the foam within the panel cavities.
Implementation Method 1
injecting an expandable polymer through the at least one injection aperture into the at least one cavity. The method also includes forcing the shelves of the multi-panel consolidation device into an expanded configuration after a predetermined period of time selected to permit the expandable polymer to form a stable expanded foam within the at least one cavity
Implementation Method 2
The forcing the shelves of the multi-panel consolidation device into the collapsed configuration includes applying a motive force to the frame for moving the frames into the collapsed configuration, and a compressive force for constraining expansion of the expandable polymer
Implementation Method 3
The foam is disposed within each of the cavities and is bonded to the frame
Data Source
AI summary
A manufactured building panel having a building panel frame that defines a cavity and having an injection aperture in fluid communication with the cavity, and an expanded foam disposed within and filling the cavity. A fabric covers and is bonded to a front surface and a rear surface of the frame to enclose the cavity. The expanded foam is formed by injecting an expandable polymer through the injection aperture and into the cavity, which expands to fill the cavity and permeate the fabric, and to cure to form the expanded foam that bonds to the frame and the fabric.