3D Translucent Vehicle Interior Element With Cross-Linked Substrate
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Solution Overview
Problem
Existing methods for producing three-dimensional motor vehicle interior elements with translucent films are laborious and prone to high reject rates due to defects and insufficient contour trueness, making them inefficient.
Innovation Solution
A two-step method involving the production of a three-dimensional transparent substrate from a cross-linked polymer, followed by application of a coloring that allows light to shine through, ensuring high contour trueness and edge molding quality, with the option of using a polyurethane thermoset and a colored top layer for enhanced optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a three-dimensional thermoformed translucent film is used with depressions filled with optical bonding material, then the motor vehicle interior element can be produced, but the process becomes laborious and results in high reject rates due to film defects and insufficient contour trueness
Solution Approach 1:
The invention changes the fundamental parameter of the substrate material from a thermoformed translucent film to a three-dimensional transparent substrate made from cross-linked polymer (thermoset or highly cross-linked elastomer). This material parameter change enables high contour trueness and edge molding quality while simplifying the production process, as the substrate can be directly formed with the desired three-dimensional shape without requiring subsequent filling operations with optical bonding material
Solution Approach 2:
The invention uses composite material structure where a transparent substrate (cross-linked polymer) is combined with a coloring layer applied on the observer-side surface. This composite approach allows the substrate to provide structural integrity and contour accuracy while the coloring layer provides the desired optical properties and appearance, resolving the contradiction between manufacturing precision and ease of manufacture
2Reliability
If multiple production steps are required for substrate formation and coloring application, then the motor vehicle interior element can be produced, but the production time and complexity increase
Solution Approach 1:
The invention merges the substrate formation and coloring application into an integrated production process. The three-dimensional transparent substrate is formed first, then the coloring is applied on the observer-side surface in a continuous process flow. This merging of operations maintains high surface quality and contour trueness while improving production efficiency by eliminating separate handling and transfer steps between discrete operations
Solution Approach 2:
The invention performs preliminary action by forming the three-dimensional transparent substrate with high contour trueness and edge molding quality before applying the coloring layer. This preliminary formation of the substrate with precise geometric properties ensures that subsequent coloring application does not compromise the contour accuracy, while the integrated process maintains high productivity
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 simplifies the production of motor vehicle interior elements with high surface quality, achieving a black panel effect and optical disappearance, while ensuring ergonomic design and scratch resistance without additional coating steps.
Implementation Method 1
a three-dimensional transparent substrate is produced from a cross-linked polymer
Implementation Method 2
the substrate is provided on an observer-side surface of the substrate with a coloring through which light can shine
Data Source
AI summary
A method for producing a three-dimensional motor vehicle interior element through which light can shine and which has an observer-side surface is produced in two steps. In a first step a three-dimensional transparent substrate is produced from a cross-linked polymer. In a second step the substrate is provided on an observer-side surface of the substrate with a coloring through which light can shine, at least in a subregion.