Multilayer Foam Panel Uniform Dispensing
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Solution Overview
Problem
Conventional methods for producing foam sandwich panel structures often result in non-uniform or defective foam layers due to inadequate distribution of the reactive foam-forming mixture, leading to aesthetic and quality issues with the top and bottom facer layers.
Innovation Solution
A flexible film fluid-dispensing device is used to uniformly distribute the foam-forming fluid onto the bottom sheet substrate, allowing for a homogeneous foam layer formation between the top and bottom substrates, reducing defects and achieving a more consistent panel density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional dispenser is used to apply reactive foam-forming mixture, then the panel structure is produced, but the foam layer becomes non-uniform and defective
Solution Approach 1:
The dispenser is divided into multiple separate dispensing units arranged in an array, with each unit applying foam mixture to a specific zone. This segmentation allows independent control of foam application in different areas, ensuring uniform distribution across the entire panel width and preventing defects caused by inadequate mixing or uneven application.
Solution Approach 2:
Each dispensing unit in the array is configured to apply foam mixture with specific local characteristics optimized for its position. The system provides tailored foam application quality at different locations across the panel, ensuring consistent foam layer uniformity and aesthetic quality throughout the entire facer surface.
2Productivity
If conventional dispensing method is used, then production is maintained, but voids and bubbles are incorporated into the foam layer
Solution Approach 1:
The reactive foam-forming mixture is pre-mixed and pre-distributed through the array of dispensing units before application to the substrate. This preliminary preparation ensures proper mixing and distribution of foam components, preventing voids and bubbles from forming during the expansion process while maintaining continuous production.
Solution Approach 2:
The array of dispensing units operates continuously to apply foam mixture across the entire panel width in a single continuous motion. This continuous application process eliminates interruptions that could cause defects, ensuring homogeneous foam layer formation while maintaining high production efficiency.
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 process results in a multilayer foam panel with a homogeneous foam layer and reduced density, enhancing the aesthetic quality and reducing defects such as voids and bubbles, while also lowering the overall panel density and production costs.
Implementation Method 1
the foam is allowed to start to rise freely, due to the reaction between the chemical components and the effect of the blowing agent
Implementation Method 2
the gases (blowing and nucleating agents) nucleate and expand via bubbles leading to the formation of the final foam
Implementation Method 3
The foam in the panel structure is then allowed to cure; and thereafter, the panel structure is cross-sawn into panels
Data Source
AI summary
A multilayer foam panel member including: (a) at least one top sheet substrate; (b) at least one bottom sheet substrate; and (c) a middle substrate of foam material disposed inbetween, and integral with, the top and bottom sheet substrates; wherein the foam material is produced by dispensing a reactive foam-forming fluid mixture onto a moving or stationary bottom sheet substrate of a foam manufacturing line; and wherein the foam manufacturing line includes a flexible film fluid dispensing device for dispensing the reactive foam-forming fluid mixture onto the moving or stationary bottom sheet substrate to form a multilayer foam panel member; wherein the middle substrate of foam material of the panel member has improved thermal and mechanical properties; and a process for manufacturing the above multilayer foam panel member.