Surface Micro-Texturing by Etchant Printing for Durable Riblets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for manufacturing micro-textures on aerodynamic surfaces, such as riblets, are slow, costly, and lack durability, making large-scale production economically unviable due to challenges in precise positioning and bonding of small-scale structures on large areas.
Innovation Solution
A method and apparatus for micro-texturing using an inkjet printer with a nozzle assembly to deposit an etchant onto a substrate, allowing for controlled removal of material to form micro-structures like riblets or lotus leaf patterns, enabling precise and efficient creation of drag-reducing surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional machining or grinding methods are used to manufacture micro-textures, then manufacturing precision can be achieved, but productivity is slow and cost is high
Solution Approach 1:
The patent replaces traditional mechanical machining and grinding methods with a chemical etching process. An etchant solution is applied to the substrate to chemically remove material and form micro-textures, substituting mechanical force with chemical reaction to achieve both precision and higher productivity
Solution Approach 2:
The patent changes the fundamental parameter of material removal from mechanical (machining/grinding) to chemical (etching). By controlling etchant concentration, exposure time, and application method, the process achieves precise micro-texture formation while significantly increasing manufacturing speed compared to traditional mechanical methods
2Ease of manufacture
If plastic films with riblets are molded and applied to aerodynamic surfaces, then manufacturing cost is reduced, but reliability deteriorates due to degradation under atmospheric conditions
Solution Approach 1:
The patent extracts the micro-texture pattern from a separate plastic film component and directly creates it on the aerodynamic surface itself through chemical etching. This eliminates the need for separate bonding operations and removes the plastic film material that would degrade, while maintaining the drag-reducing riblet pattern
Solution Approach 2:
The patent merges the surface texture creation process with the substrate preparation process. Instead of applying a separate textured film to the aerodynamic surface, the etching process directly forms micro-textures on the aerodynamic surface material, combining structure and function into a single durable component
3Ease of manufacture
If plastic films are bonded to large aerodynamic surfaces, then ease of manufacture improves, but device complexity increases due to challenges in precise positioning and bonding
Solution Approach 1:
The patent extracts the micro-texture formation process from a separate film application process and integrates it directly into the aerodynamic surface. This eliminates the need for separate positioning and bonding operations, removing the associated complexity while maintaining the ability to treat large surfaces
Solution Approach 2:
The etching process is applied directly to the aerodynamic surface, allowing the surface itself to receive the micro-texture treatment in place. This self-service approach eliminates the need for separate application tools, positioning systems, and bonding processes that would add device complexity
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 approach allows for the cost-effective and durable production of micro-textured surfaces on large scales, including complex geometries, enhancing drag reduction and hydrophobicity, and can be applied to various aerodynamic surfaces like aircraft and sports equipment.
Implementation Method 1
forming a micro-texture on the substrate surface by removing material from the substrate surface... dissolving substrate material in the etchant
Data Source
Figure 1~3
Figure 4~5
Figure 6~9
AI summary
A method of micro-texturing a surface is disclosed. The method includes printing an etchant onto a substrate surface and forming a micro-texture on the substrate surface by removing material from the substrate surface.