Lightweight Panel Honeycomb Airflow for Adhesive Curing
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Solution Overview
Problem
The existing methods for bonding lightweight panels with a honeycomb middle layer to lignocellulose-based cover panels face challenges such as long pressing times, high costs, and technical complexity due to difficulties in curing adhesives, particularly with wood-based materials that are poor conductors of heat and sensitive to heat stress.
Innovation Solution
Incorporating openings in the honeycomb structure's walls to allow lateral airflow, which accelerates the curing of adhesives by introducing heated air from the side edges into the panel, reducing pressing time and improving bonding efficiency without damaging the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physically drying adhesive systems are used, then adhesive curing is achieved, but pressing time becomes excessively long and production capacity is limited
Solution Approach 1:
The patent introduces a third dimension for heat transfer by incorporating a heating element that acts on the adhesive from the side, rather than only from the top or bottom. This lateral heating approach creates a three-dimensional heat distribution pattern that accelerates curing without extending pressing time, thereby resolving the contradiction between reliable adhesive curing and high production capacity.
2Speed
If highly reactive adhesive systems are used, then curing speed increases, but cost increases and handling becomes difficult requiring intensive cleaning
Solution Approach 1:
The patent introduces an intermediary heating element as a mediator between the adhesive and the heat source. This controlled thermal input acts as a buffer that allows moderate adhesive systems to cure at optimized speeds without requiring the problematic highly reactive systems, thus maintaining ease of manufacture while achieving acceptable curing speed.
3Speed
If electric fields are used to introduce energy into the layered structure, then adhesive curing is accelerated, but technical complexity and energy cost increase
Solution Approach 1:
The patent replaces complex electrical field systems with a simpler thermal heating element that can be directly integrated into the pressing mechanism. This substitution eliminates the need for complex electrical infrastructure while achieving accelerated curing through controlled thermal energy, thus reducing device complexity and energy infrastructure requirements.
4Reliability
If thermal energy is introduced via the press, then adhesive curing is achieved, but wood-based materials are poor heat conductors and can only withstand limited heat stress
Solution Approach 1:
The patent applies local quality by concentrating thermal energy specifically at the adhesive bonding interfaces rather than heating the entire wood-based panel uniformly. The heating element is positioned to deliver thermal energy precisely where needed for curing, while the rest of the panel remains at lower temperatures, thus avoiding excessive heat stress damage to the wood material while achieving reliable adhesive curing.
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 approach significantly reduces adhesive curing time, enhances production capacity, and improves the quality of the connection between the middle layer and cover panels while maintaining panel stability, using a cost-effective method that can be easily integrated into existing production systems.
Implementation Method 1
an air flow supplied from outside the lightweight panel, in particular transversely to the longitudinal direction or at an obtuse angle to the longitudinal direction, from a side edge of the lightweight panel into the interior of the lightweight panel
Implementation Method 2
the middle layer with its upper side with the upper cover plate and with its underside glued to the lower cover plate using an adhesive
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The board (1) has an upper cover plate (2), and a lower cover plate (3) made from material containing lignocellulose, where the plates run in a longitudinal direction (L). A middle layer (4) runs between the plates and has a honeycomb structure (5) with walls (7a, 7b). Upper and lower sides of the layer are connected with the plates, respectively by an adhesive. A through hole (10) is formed in one of the walls, where a cross-sectional surface of the hole is formed, such that the hole permits air flow from a side edge (1a) of the board to an inner area of the board in the direction. An independent claim is also included for a method for manufacturing a lightweight building board.