Laser Etching Transparent Vehicle Parts for Precision Patterns
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Solution Overview
Problem
Existing methods for enhancing the exterior appearance of transparent vehicle parts, such as headlamp and turn signal protectors, face issues with color mismatching with the vehicle's paint and lack of precision in pattern application, and struggle with protecting against ultraviolet radiation and ensuring mechanical strength.
Innovation Solution
A method involving applying a paint coat, a first varnish coat, and a transparent primer coat to a transparent part, followed by laser etching to create a precise pattern, and a second varnish coat for UV protection, which allows for precise pattern creation without color mismatch and enhances mechanical strength and UV resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a film with opaque pattern is overmolded on the external surface of the transparent part, then the aesthetics of the light beam is improved, but color mismatching with the vehicle paint occurs and pattern precision is reduced
Solution Approach 1:
The patent replaces the mechanical film overmolding process with a laser-based ablation process. The laser precisely removes material from the transparent part according to a digital pattern, eliminating the need for physical film application and achieving superior pattern precision while maintaining aesthetic light beam effects
Solution Approach 2:
The patent changes the approach from adding an opaque film layer to directly modifying the transparent part's surface through controlled material removal. By adjusting laser parameters (power, speed, pattern), precise optical patterns are created that match the vehicle paint color perfectly, eliminating color mismatching issues
2Manufacturing precision
If laser radiation is used to etch the paint coat and first varnish coat, then pattern precision is improved, but the transparent part may be damaged by excessive laser energy
Solution Approach 1:
The patent applies paint and varnish coats to the transparent part before laser etching. These coats serve as sacrificial layers that absorb laser energy, protecting the underlying transparent part from direct laser exposure while still allowing precise pattern creation in the coated layers
Solution Approach 2:
The paint and varnish coats act as intermediary layers between the laser radiation and the transparent part. These intermediaries absorb the laser energy required for pattern creation while preventing the same energy from damaging the transparent part, enabling precise etching without harmful side effects
3Object-affected harmful factors
If multiple varnish coats are applied for UV protection, then UV resistance is improved, but adhesion between coats becomes difficult
Solution Approach 1:
The patent creates different surface properties at different locations and layers. The first varnish coat is applied to the entire surface initially, then selectively removed by laser in the pattern areas. The second varnish coat is applied only to the exposed transparent part areas. This localized approach ensures proper adhesion at each interface while maintaining UV protection in covered areas
Solution Approach 2:
The patent segments the varnish application process into distinct stages: first applying varnish to the entire surface, then selectively removing it in pattern areas, and finally applying a second varnish layer only where needed. This segmentation allows each varnish layer to adhere properly to its specific substrate without the adhesion problems that arise from applying multiple coats simultaneously
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
The method achieves precise pattern creation without color mismatch, improves the mechanical strength and UV resistance of transparent vehicle parts, and enhances the overall appearance and illumination by maximizing light transmission while maintaining the vehicle's paint color consistency.
Implementation Method 1
irradiating the paint coat and the first varnish coat in part with laser radiation so as to etch the paint coat and the first varnish coat
Implementation Method 2
the first and second varnish coats are made of a material that absorbs or reflects ultraviolet radiation. This protects the transparent part from ultraviolet radiation that might deteriorate it by photodegradation
Implementation Method 3
applying a transparent primer coat to the first varnish coat, and applying a second varnish coat to the transparent primer coat
Data Source
AI summary
In this method for manufacturing a vehicle part, the following steps are implemented, applying a paint coat to a transparent part, applying a first varnish coat to the paint coat, irradiating the paint coat and the first varnish coat in part with laser radiation so as to etch the paint coat and the first varnish coat, applying a transparent primer coat to the first varnish coat, and applying a second varnish coat to the transparent primer coat.