Overpressure Isocyanate Injection for Wood Panel Edge Sealing
Solution Overview
Problem
Existing methods for modifying technological properties of wood-based panels, such as electrical, mechanical, and hydronic properties, are limited in variability and effectiveness due to difficulties in sealing systems, leading to inefficient targeted modifications, especially in edge areas of cut or raw fixed sizes.
Innovation Solution
A method involving fixing a wood-based panel or pre-compacted material fleece on a work table, applying a treatment medium through an application unit with an applicator nozzle surrounded by a housing, and introducing overpressure to penetrate the medium into specific areas, allowing for targeted modification of properties in individual areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vacuum sealing is used to apply treatment medium to wood-based panels, then the treatment medium can penetrate the panel, but the sealing difficulty reduces effectiveness and increases system complexity
Solution Approach 1:
Instead of applying vacuum to pull the treatment medium through the panel, the patent inverts the approach by applying overpressure to push the treatment medium through the panel. This eliminates the need for complex vacuum sealing systems while achieving effective penetration of the treatment medium into the wood-based panel.
Solution Approach 2:
The patent uses pneumatic pressure (overpressure) to drive the treatment medium through the panel, replacing the vacuum-based approach. This simplifies the sealing requirements and makes the system more reliable by using a more straightforward pressure-driven fluid delivery mechanism.
2Manufacturing precision
If modification agent is applied during panel production, then technological properties can be improved, but the manufacturing process is significantly affected or disrupted
Solution Approach 1:
The treatment medium is applied after the panel has been manufactured and cut to size, rather than during the manufacturing process. This preliminary action allows the panel to be produced using standard processes without disruption, and then selectively treated afterward to achieve the desired technological property modifications.
Solution Approach 2:
The patent applies the treatment medium only to specific areas of the panel (such as edge areas) rather than the entire panel. This local application modifies technological properties only where needed, avoiding the need to alter the entire manufacturing process while achieving targeted improvements.
3Manufacturing precision
If entire panel is modified to improve technological properties, then all areas gain improved properties, but cost increases and flexibility decreases
Solution Approach 1:
The patent applies the treatment medium selectively to specific areas of the panel (such as edge areas requiring improved properties) rather than treating the entire panel. This allows different areas to have different properties as needed, providing flexibility for various applications while avoiding unnecessary treatment of areas that already meet requirements.
Solution Approach 2:
The patent applies treatment only to the extent necessary - specifically to edge areas or other specific regions that require property improvement - rather than treating the entire panel. This partial action reduces cost and increases flexibility while still achieving the required technological properties where needed.
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
Enables flexible and efficient modification of technological properties in specific areas of wood-based panels, reducing production costs and environmental impact by allowing precise control over treatment medium application and pressure, enhancing properties like mechanical strength and water resistance.
Implementation Method 1
overpressure is introduced into the housing, causing the isocyanates to penetrate the wood-based panel, wood-based fleece or wood fiber cake
Data Source
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AI summary
The invention relates to a method for selectively influencing the technological properties (2a) of individual areas of a wood-based panel (2) comprising the following steps: a) fixing the wood-based panel (2) or a pre-compressed wood-based nonwoven (2') or a wood fiber cake (2') on a worktable (1), b) applying at least one application unit (3) to the top and/or the bottom of the wood-based panel (2), the wood-based nonwoven (2') or the wood fiber cake (2'), c) selectively moving the at least one application unit (3) on the top and/or the bottom and pressing isocyanates into partial areas of the wood-based panel (2), the wood-based nonwoven (2') or the wood fiber cake (2') in a predetermined quantity and under a predetermined pressure,d) optionally subsequent pressing of the pre-compressed wood-based fleece (2') or the wood fiber cake (2') to form a wood-based panel (2) of the desired thickness.