Continuous Fire-Resistant Foam Panel Manufacturing Process
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Solution Overview
Problem
The existing methods for manufacturing insulation panels with metallic facing sheets and fiber-reinforced polymeric foam cores are inefficient, requiring multiple separate processes due to difficulties in impregnating the foam core and applying facing sheets, leading to increased equipment and operating costs.
Innovation Solution
A continuous process involving the sequential feeding of metallic facing sheets, fiber mats, and a curable foamable resin composition, with a flexible barrier material and adhesive layers, through a constricted region to impregnate the fiber mat and apply the facing sheets in a single operation, using a double band laminator to cure and form the foam laminate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple separate manufacturing processes are used to make insulation panels with fiber-reinforced foam cores and metallic facing sheets, then the difficulty of impregnating fiber mat with resin composition is reduced, but equipment costs and operating costs increase
Solution Approach 1:
The patent combines multiple separate manufacturing operations (applying resin composition to fiber mat, impregnating the fiber mat, expanding the foam, and applying metallic facing sheets) into a single continuous manufacturing process. The resin composition is applied to the fiber mat in a first operation, then the assembly passes through a constricted region where impregnation and expansion occur simultaneously, followed by immediate application of facing sheets in the same continuous line, eliminating the need for separate batch processes for each operation.
Solution Approach 2:
The resin composition is applied to the fiber mat before the impregnation and expansion steps in a preliminary coating operation. This preliminary application ensures that the fiber mat is pre-saturated with resin at the correct locations, allowing for controlled impregnation when the assembly passes through the constricted region, and preventing resin waste or improper distribution that would occur if resin were added later in the process.
2Device complexity
If a single continuous process is used to manufacture insulation panels with fiber-reinforced foam cores and metallic facing sheets, then equipment costs and operating costs are reduced, but the difficulty of impregnating the foam core and applying facing sheets increases
Solution Approach 1:
The patent employs a dynamic constricted region that can be adjusted to control the impregnation pressure and degree of compression on the fiber mat-resin assembly. The constricted region creates a controlled high-pressure zone that forces the resin composition into the fiber mat as the assembly moves through it, with the constriction dimensions and pressure being可调 to optimize impregnation efficiency while maintaining continuous production flow.
Solution Approach 2:
The flexible barrier material serves as an intermediary layer between the resin composition and the metallic facing sheets. This barrier material allows the resin to be applied and impregnated into the fiber mat first, then facilitates the subsequent application and bonding of the metallic facing sheets to the foam core, ensuring proper adhesion and preventing resin contamination of the facing sheet application equipment in a continuous process.
3Strength
If fiber reinforcement is included in the polymeric foam layer, then mechanical properties and fire resistance are enhanced, but the manufacturing process becomes more difficult
Solution Approach 1:
The patent applies resin composition locally to specific areas of the fiber mat rather than attempting to saturate the entire mat uniformly. The resin is applied in controlled patterns or zones where reinforcement is most needed, and the constricted region impregnates only the necessary portions of the fiber mat with resin, allowing for efficient manufacturing while providing targeted mechanical reinforcement and fire resistance in the foam core.
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 process enables the production of insulation panels with enhanced mechanical properties, thermal insulation, and fire resistance while reducing equipment and operating costs by integrating the manufacturing steps into a single continuous operation.
Implementation Method 1
a curable, foamable resin composition
Implementation Method 2
cure the resin composition
Implementation Method 3
an adhesive layer adhered to layer of the substantially flexible barrier material
Data Source
Figure 1
Figure 2~4
AI summary
A continuous process for preparing insulation panels having thick (0.2 mm to 1 mm) metal facing panels and a fiber-reinforced polymer foam core is disclosed. In the process, a bottom metal facing panel (2) is continuously supplied. A mat (10) of reinforcing fibers and a foamable resin composition (19) are applied to the bottom facing panel. A flexible barrier layer (5) is applied atop the foamable resin composition, and the assembly is passed through nip rolls (12,13) to compress the assembly and force the resin composition into the fiber mat. An adhesive layer (4) and top metallic facing layer (1) are then applied on top of the flexible barrier layer, and the resulting assembly is gauged and cured by passing it through a double band laminator (11).