Heated Embossing Roller for Deep Panel Structures
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Solution Overview
Problem
Current methods for producing panels with decorative surfaces are time-consuming and costly, requiring specialized pressing plates and high-pressure equipment, which limits flexibility and efficiency in embossing three-dimensional structures onto wood-based panels.
Innovation Solution
A method using heated embossing rollers and counter-pressure rollers to emboss structures into heat-activatable synthetic resin or radiation-curable lacquer layers on wood-based panels, allowing for deep embossing depths of up to 500 μm with pressures of 196-1470 N/cm², enabling the creation of precise three-dimensional patterns without the need for specialized press plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If specialized press plates are used for embossing structures into coating materials, then deep and authentic pores can be achieved, but the production process becomes costly and time-consuming due to the need to produce and change press plates for each structure
Solution Approach 1:
The invention uses a flexible foil with a relief structure that copies the desired embossing pattern. This foil can be easily replaced to change structures, avoiding the need to produce new rigid press plates for each design. The foil acts as an intermediate copying element that transfers the desired surface structure to the coating material during embossing.
Solution Approach 2:
The invention changes the physical state of the coating material by heating it to a temperature where the synthetic resin becomes soft and pliable. This temperature parameter change allows the coating to be embossed more easily and deeply without requiring excessive pressure or complex press plates. The heating enables the coating to accept the embossed structure at lower pressures than would be required at room temperature.
2Manufacturing precision
If high pressure is applied to emboss structures into hardened coating layers, then deep embossed patterns can be achieved, but the process becomes unsuitable for already produced panels
Solution Approach 1:
The invention uses temperature as a key parameter to control the embossing process. By heating the coating material to a specific temperature range, the synthetic resin becomes soft and can be embossed at relatively low pressures. This allows embossing to be performed on already produced panels without requiring high pressure that would be necessary for hardened layers.
Solution Approach 2:
The invention exploits the phase transition of the synthetic resin in the coating material from a hard, cured state to a soft, pliable state through heating. This temporary phase change enables the coating to be embossed deeply without requiring high pressure. After embossing, the coating cools and returns to its hardened state, maintaining the embossed structure permanently.
3Productivity
If embossing is performed immediately after laminate production, then structures can be embossed before complete curing, but intermediate storage is not possible
Solution Approach 1:
The invention uses localized heating during the embossing process to temporarily soften the coating material at the embossing location. This allows the coating to be embossed at any stage of production or even on finished panels, as only the localized area being embossed needs to be heated, not the entire panel. This eliminates the constraint of needing to emboss immediately after laminate production.
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 simplifies the production of panels with high-gloss, deep embossed patterns, reducing production costs and allowing for flexible changes in embossed designs, while maintaining high precision and authenticity of natural material imitation, and enabling embossing on already produced panels.
Implementation Method 1
Heating the embossing roller to a temperature of 200 - 500°C
Implementation Method 2
embossing a structure with a depth of up to 500 μm in the heat-activatable synthetic resin or paint layer on the top and/or bottom of the panel with a pressure of 196 - 1470 N/cm²
Data Source
Figure 1~2
AI summary
The method involves heating the embossing roll (4) from two hundred to five hundred degree celsius. The panel (1) is introduced between the embossing roll and a counter roll (5). A structure is embossed with a depth up to five hundred micrometers into the heat-activated synthetic resin layer on the top side (2) of the panel with a pressure of five hundred ninety to nine thousand four hundred seventy newton per centimeter square. An independent claim is also included for the application of embossing roll in the method.