Trim Element Forming with Engraved Film Transfer
Solution Overview
Problem
Existing methods for producing trim elements with a wooden appearance and feel struggle to achieve flexibility and embossing without degrading thin layers of ligneous material, as traditional embossing techniques require thicker layers.
Innovation Solution
Applying a film with an engraved pattern onto the ligneous material before forming, allowing the pattern to be transferred during pressing, enabling embossing without degrading the material, and using an injection tool to form a support layer in a single step, allowing for thin, flexible layers to conform to three-dimensional shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional embossing techniques (roller or manual processing) are used on the ligneous material layer, then the layer can acquire a three-dimensional wood aspect and feel, but the layer must be relatively thick which degrades flexibility
Solution Approach 1:
A transfer film is introduced as an intermediary element between the embossing tool and the ligneous material layer. The film carries the engraved pattern and transfers it to the ligneous material during injection molding, enabling embossing without direct mechanical contact that would degrade thin layers. This mediator allows the pattern transfer to occur through material flow and pressure rather than direct pressing.
Solution Approach 2:
The traditional mechanical embossing system (roller or manual pressing) is replaced with an injection molding-based transfer system. Instead of mechanically pressing the ligneous material to create the wood grain pattern, the pattern is transferred via a film that imprints the design during the injection process, substituting direct mechanical deformation with a transfer mechanism.
2Adaptability or versatility
If the ligneous material layer is made thin to improve flexibility, then it can conform to three-dimensional shapes, but it becomes unsuitable for traditional embossing treatments
Solution Approach 1:
The transfer film serves as a mediator that enables pattern transfer onto thin ligneous material layers without requiring traditional embossing methods. The film absorbs the embossing stress and transfers the pattern through material flow during injection, making the process compatible with thin, flexible layers that would otherwise be too delicate for direct mechanical embossing.
Solution Approach 2:
The embossing pattern is pre-formed on the transfer film before the injection process. This preliminary preparation of the pattern on the film allows the thin ligneous material layer to receive the imprint during molding without undergoing the harsh mechanical conditions of traditional embossing, thus preserving flexibility while achieving the desired wood aspect.
3Manufacturing precision
If multiple separate steps (emboising then forming) are used to produce the trim element, then each step can be optimized, but the production time and complexity increase
Solution Approach 1:
The embossing pattern transfer and the injection molding forming operations are merged into a single integrated process. The transfer film is positioned in the mold cavity along with the ligneous material layer, and both the pattern transfer and the support layer formation occur simultaneously during one injection cycle, eliminating sequential steps and improving production efficiency.
Solution Approach 2:
The injection mold serves multiple functions: it forms the support layer, transfers the embossing pattern via the film, and shapes the final trim element all in one operation. This multi-functional approach consolidates what would traditionally require separate embossing and forming steps into a single universal manufacturing process.
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 production of trim elements with a realistic wooden appearance and feel, maintaining material integrity and flexibility, while reducing production steps and costs, and enabling easy modification of patterns without altering the forming tool.
Implementation Method 1
the forming tool being an injection tool, the layer of ligneous material being placed in the injection tool such that its back face forms, with an opposite wall of the injection tool, an injection cavity having the shape of the support layer to be produced, the pressing of the layer of ligneous material being performed by injecting in the injection cavity an injection material in order to form the support layer on the back side of the layer of ligneous material
Implementation Method 2
applying a film having at least one engraved pattern on the front face of the layer of ligneous material before placing said layer in the forming tool such that, during the pressing of the trim element, the engraved pattern is transferred to the front face of the trim element
Data Source
Figure 1~5
AI summary
The method comprises the following steps: - placing a layer of ligneous material (4) in a forming tool, the front face of said layer being turned towards a wall of the forming tool, - pressing the layer of ligneous material (4) against said wall such that is adopts the shape of the trim element (2). The method further comprises the following steps: - applying a film (8) having at least one engraved pattern (10) on the front face of the layer of ligneous material (4) before placing said layer (4) in the forming tool such that, during the pressing of the trim element (2), the engraved pattern (10) is transferred to the front face of the trim element (2), - removing the film (8) after the pressing of the layer of ligneous material (4).