Vehicle Trim Insert Protects Wood From Overmolding Damage
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Solution Overview
Problem
The existing methods for manufacturing wood-clad trim elements in vehicles often damage the ligneous material due to high-pressure and high-temperature plastic overmolding, leading to aesthetic issues and unsatisfactory results.
Innovation Solution
A trim element design that includes an insert made of a second plastic material interposed between the reinforcing layer and the support, allowing for injection molding without direct contact with the ligneous material, which protects the wood layer and maintains a satisfactory aesthetic appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If plastic material is overmolded directly onto the complex at high pressures and temperatures, then the support is formed, but the ligneous material is damaged causing burns and deteriorating aesthetic appearance
Solution Approach 1:
An insert made of second plastic material is introduced as an intermediary element between the ligneous material complex and the support. This insert protects the ligneous material from direct contact with high-pressure and high-temperature plastic material during overmolding, preventing burns and aesthetic damage while still allowing the support to be formed. The insert acts as a protective barrier that mediates the interaction between the harmful molding process and the sensitive ligneous surface.
Solution Approach 2:
The support structure is segmented into two distinct plastic material layers: a first plastic material forming the main support structure, and a second plastic material forming the insert that contacts the ligneous material. This segmentation allows each layer to serve different functions - the first layer provides structural support while the second layer provides protective contact during molding, resolving the contradiction between manufacturing requirements and aesthetic preservation.
2Reliability
If an insert is interposed between the reinforcing layer and the support, then the ligneous material is protected from damage, but the device complexity increases
Solution Approach 1:
The insert is merged with the support through overmolding, where the first plastic material is injected to form the support structure that integrates with the insert. This combining approach creates a unified component where the insert and support function together as a single assembly, reducing the practical complexity despite the additional protective function. The merged structure eliminates the need for separate assembly steps and creates a more reliable integrated solution.
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 prevents damage to the ligneous material during the manufacturing process, ensuring a luxurious and aesthetically pleasing wood-like coating for vehicle trim elements while being cost-effective and simple to produce.
Implementation Method 1
at least one insert, made of a second plastic material, interposed between the reinforcing layer of the complex and the support so as to space the support from the reinforcing layer
Implementation Method 2
the overmolding of the support requires injecting plastic material onto the complex at high pressures and temperatures
Implementation Method 3
a complex consisting of at least one layer of ligneous material, on the back of which is glued a reinforcing layer
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The invention relates to a vehicle trim element (1) comprising: - a composite (6) comprising at least one layer of wood-based material (10) having an outer face and an inner face, and a reinforcing layer (8) extending over the inner face of the wood-based material layer (10); and - a support (2) made of a first plastic material. The trim element (1) further comprises at least one insert (4), made of a second plastic material, interposed between the reinforcing layer (8) of the composite (6) and the support (2) so as to separate the support (2) from the reinforcing layer (8), the support (2) being injection-molded onto the insert (4).