Laser Texturing of Enamel Decorations Without Color Damage
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Solution Overview
Problem
Enamel engraving is not widely used due to the need for mastery of the engraving technique to avoid damaging the surface and altering its color, and existing methods struggle to create thick, durable enamel decorations suitable for stressed components like watch bezels.
Innovation Solution
A method involving laser ablation with femtosecond or picosecond lasers for engraving and texturing enamel, allowing controlled surface finish and color alteration, combined with a manufacturing process for depositing thick enamel layers to enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual cutting and polishing techniques are used for enamel decoration, then artistic detail and precision can be achieved, but the surface is easily damaged and color alteration occurs
Solution Approach 1:
The patent replaces manual mechanical cutting and polishing tools with laser technology for engraving and texturing enamel. The laser beam enables precise material removal and surface modification without physical contact, eliminating the risk of surface damage and color alteration associated with mechanical tools while maintaining high manufacturing precision.
Solution Approach 2:
The patent utilizes controllable laser parameters (power, pulse duration, scanning speed) to precisely regulate the engraving and texturing process. By adjusting these parameters, the laser can remove material or modify surface texture without exceeding the threshold that would cause enamel damage or color change, thus resolving the contradiction between precision and reliability.
2Device complexity
If thin layers of enamel are used in traditional decorations, then manufacturing complexity is reduced, but brittleness increases making them unsuitable for stressed components
Solution Approach 1:
The patent applies laser engraving and texturing to the enamel surface before final assembly and stress testing. This preliminary treatment creates a reinforced surface structure and removes micro-defects that would serve as stress concentration points, thereby preventing future cracking and enhancing durability without adding manufacturing complexity.
Solution Approach 2:
The patent modifies enamel layer thickness parameters to optimize the balance between durability and manufacturing complexity. By using controlled laser processing on appropriately thickened enamel layers, the patent achieves sufficient strength for stressed components while maintaining manageable manufacturing complexity through standardized processes.
3Manufacturing precision
If complex engraving techniques are mastered to avoid enamel damage, then surface quality is maintained, but production time and cost increase
Solution Approach 1:
The patent replaces complex manual engraving techniques with automated laser processing. The laser system, controlled by computer software, can execute complex engraving patterns and texturing operations automatically without requiring operator skill or manual intervention, thereby maintaining high surface quality while dramatically improving production efficiency and reducing costs.
Solution Approach 2:
The laser system is equipped with automated control and monitoring capabilities that enable it to self-regulate processing parameters and self-correct deviations during operation. This self-service capability ensures consistent surface quality without requiring constant human oversight, thereby maintaining precision while enhancing 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
Enables reproducible, low-cost mass production of durable enamel decorations with thicknesses greater than 0.5 mm, suitable for stressed components, and creates depth effects like holograms, overcoming brittleness and color alteration issues.
Implementation Method 1
laser ablation step using a femtosecond or picosecond laser on the surface of the enamel and/or within the enamel to produce a structure
Data Source
AI summary
A method for engraving and texturing an item (1) including a decoration (2) filled at least partially with an enamel (3), the method including a laser ablation step using a femtosecond or picosecond laser on the surface of the enamel (3) and/or within the enamel (3) to produce a structure (7).