Coating Workpiece Edges with Curable Liquid and Laser Activation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for coating panel-shaped workpieces with rough or porous surfaces struggle to achieve a thin, visually appealing coating with minimal adhesive usage, as excessive heat input can cause physical or chemical changes and make uneven structures visible on the surface.
Innovation Solution
A method involving the application of a first curable liquid to smooth and prepare the workpiece surface, followed by a second liquid for improved quality, and using thermo-activatable adhesives with controlled heat input, such as a laser, to apply thin edges with minimal adhesive, ensuring even adhesion and a smooth finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat is applied to activate the adhesive, then adhesion is improved, but excessive heat causes physical or chemical changes to the workpiece, coating, or adhesive
Solution Approach 1:
The workpiece surface is pre-treated with a porous structure creation step before adhesive application. This preliminary action modifies the surface topology to enhance mechanical interlocking, allowing reduced reliance on thermal activation and thus preventing excessive heat-related damage while maintaining reliable adhesion.
Solution Approach 2:
The invention changes the surface parameter of the workpiece by creating a porous structure through controlled roughening or etching processes. This parameter change in surface topology provides enhanced mechanical interlocking capability, enabling strong adhesion without requiring excessive heat input that would cause harmful physical or chemical changes.
2Manufacturing precision
If thin edge coating is applied, then aesthetic appearance and cost are improved, but the unevenness of the workpiece edge shows through the coating
Solution Approach 1:
The workpiece edge undergoes preliminary surface treatment to create a porous structure before coating application. This pre-treatment ensures uniform adhesive distribution and strong bonding, allowing thin coating layers to effectively mask underlying unevenness while maintaining aesthetic appearance.
Solution Approach 2:
The invention applies local quality enhancement by creating a porous structure specifically at the edge surface regions that require coating. This localized surface modification ensures that the coating adheres uniformly and effectively conceals edge unevenness, while the rest of the workpiece remains unchanged.
3Manufacturing precision
If minimal adhesive is used, then the edge lies close to the workpiece surface improving aesthetics, but adhesion reliability becomes compromised
Solution Approach 1:
The workpiece surface is pre-treated to create a porous structure before minimal adhesive application. This preliminary surface modification provides enhanced mechanical interlocking capability, compensating for the reduced adhesive quantity and ensuring reliable adhesion even when using minimal adhesive for aesthetic edge alignment.
Solution Approach 2:
The invention changes the surface parameter by creating a porous structure that increases surface area and mechanical interlocking potential. This parameter change allows minimal adhesive to achieve sufficient bonding strength, enabling both aesthetic edge alignment and reliable adhesion simultaneously.
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 allows for the effective coating of workpieces with low material thickness edges using little adhesive, achieving a smooth, visually appealing result by evenly distributing heat and improving adhesion, thus eliminating the visibility of unevenness.
Implementation Method 1
The use of a laser to apply energy, particularly to heat the workpiece surface or edge, has proven to be an advantageous technique for highly customizable heat input
Implementation Method 2
The laser is guided along a path across the workpiece surface or edge, thereby achieving the desired heating effect
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for coating workpieces (10), preferably in sheet form, which preferably consist at least in certain portions of wood, wood-based materials, plastic or the like, with the following method steps: providing a workpiece (10) having at least one workpiece surface (12), in which the workpiece surface (12) is improved by applying at least a first curable liquid to the workpiece surface (12) and at least partially curing the first liquid (16); exposing the workpiece (10) to energy, at least on the workpiece surface (12) and/or a coating (14) that is intended to be applied to the workpiece surface (12); and applying the coating (14), in particular of an edge (14), to the liquid-coated workpiece surface (12) and preferably pressing the edge (14) onto the liquid-coated workpiece surface (12).