Heated Pressurized Air Edge Coating Device
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Solution Overview
Problem
Existing methods for applying edging strips to narrow surfaces, such as those in woodworking, face challenges with adhesive accuracy, visibility, and equipment costs, particularly with hot-melt adhesives and high-energy laser systems, which are not suitable for smaller craftsmen or DIY users.
Innovation Solution
A device using heated compressed air to activate multi-layer, adhesive-free edging strips, achieving secure bonding with higher pressure and temperature control than conventional hot air blowers, allowing for efficient and cost-effective processing of zero joint or laser edge strips on both industrial and manual scales.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hot-melt adhesive is applied in advance as a layer, then bonding is achieved, but the adhesive layer is aesthetically disadvantageous and visible after application
Solution Approach 1:
The patent removes the adhesive layer from the edging strip by using adhesive-free strips with a heat-activatable layer instead. The adhesive function is extracted and replaced by thermal activation of the edging strip material itself, eliminating the visible adhesive layer while maintaining bonding reliability.
Solution Approach 2:
The patent changes the bonding mechanism from chemical adhesive bonding to thermal bonding by heating the edging strip to its melting point. This parameter change (from chemical to thermal process) eliminates the need for visible adhesive layers while achieving reliable bonding.
2Temperature
If high-energy laser systems are used for heating, then thermal activation is achieved, but equipment costs are high and occupational safety is problematic
Solution Approach 1:
The patent replaces expensive, complex laser systems with a simple, inexpensive heating element and air blowers. The heating element is a basic resistive heater that can be easily replaced if needed, making the system affordable for smaller craftsmen and DIY users while achieving the same thermal activation effect.
Solution Approach 2:
The patent substitutes the optical/mechanical laser system with a thermal/electrical heating system. Instead of using high-energy laser beams, the invention uses electrically heated elements combined with pressurized hot air to achieve thermal activation, dramatically reducing equipment complexity and cost.
3Temperature
If conventional hot air blowers are used, then heating is achieved, but pressure is insufficient for proper bonding
Solution Approach 1:
The patent combines heating and pressurization into a single integrated process. The air blower delivers pressurized hot air that simultaneously heats the edging strip and applies bonding pressure, eliminating the need for separate heating and pressing operations and ensuring proper bonding through combined thermal and mechanical action.
Solution Approach 2:
The patent uses pressurized air delivery through blowers to provide both thermal energy and mechanical pressure. The pneumatic system delivers hot air at sufficient pressure to simultaneously heat and press the edging strip against the workpiece, achieving proper bonding without requiring additional mechanical pressing equipment.
4Reliability
If the hot-melt adhesive layer is heated to high temperature, then bonding strength is improved, but the edging strip material may be impaired
Solution Approach 1:
The patent changes the material composition of the edging strip to include a heat-activatable layer with a specific melting point that is lower than the degradation temperature of the base material. This parameter change allows selective thermal activation of only the bonding layer while preserving the integrity of the edging strip's structural and cosmetic materials.
Solution Approach 2:
The patent uses composite edging strip construction with a heat-activatable layer (such as thermoplastic polymer) bonded to the base material. The composite structure allows the bonding layer to melt and flow at relatively low temperatures to create strong bonds without exposing the entire edging strip to temperatures that would damage its material integrity.
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 ensures high accuracy and optical quality of the edging strip application with reduced equipment costs, making it accessible for smaller users and industries, while maintaining the desired properties of the edging strip material.
Implementation Method 1
hot air or hot gas as heated compressed air is applied under pressure onto the edge strip and/or the heat-activatable layer of the edge strip, with the outlet being fluidically connected to a heating device which brings the heated compressed air to at least the required activation temperature
Implementation Method 2
The pressure with which the heated compressed air is applied to the edging strip and/or the heat-activatable layer of the edging strip means a pressure of the heated compressed air that is higher than the pressure that can be guaranteed with known hot air blowers
Implementation Method 3
multi-layer, adhesive-free, heat-activatable edging strip being heat-activatable on the narrow surfaces
Data Source
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Figure 2
AI summary
The invention relates to an edge coating device (1) for applying a ribbon-shaped edge strip (4) to narrow surfaces (6) of a workpiece (5), wherein the edge strip (4) can be fastened by heat activation to the narrow surfaces (6), in particular in multiple layers without adhesive or with a hot melt adhesive layer between edge strip (4) and narrow surface (6). The device comprises at least one feed device (7) for the edge strip (4) and a pressing device (9) that presses the heat-activated edge strip (4) against the narrow surface (6) of the workpiece (5). In the case of said edge coating device (1) and the corresponding coating method, an outlet (10) for hot air (16) is arranged in the region of the feed device (7) and/or pressing device (9). The opening applies the hot air (16) under a pressure of one bar or more onto the edge strip (4) and/or onto the heat-activatable layer of the edge strip (4) and/or onto the narrow surface (6) of the workpiece (5), wherein a heating device (3) is in fluidic connection for the hot air with the outlet (10). The heating device (3) brings the hot air (16) to the required activation temperature for the heat-activatable layer of the edge strip (4) or the hot melt adhesive.