Resin Product Surface Pattern for Coating Accuracy and Aesthetic Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for coating resin components used in electronic device housings face challenges in accurately transferring logos or information onto surfaces with significant height differences, leading to incomplete transfer and peeling issues, while also causing visible gaps in glossiness that deteriorate the aesthetic design.
Innovation Solution
A resin product with a surface pattern featuring a coating area and a non-coating area, where the coating area has a fine rough surface with a specific height difference and a non-coating area with a larger height difference, reducing the visible gap in glossiness by forming fine concave and convex portions on the tops of the rough surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the outer surface is smoothed to enable accurate logo transfer, then coating quality is improved, but design patterns and aesthetic appearance are deteriorated
Solution Approach 1:
The invention applies different surface qualities to different regions: the coating area has a smooth surface (Ra≤0.4μm) for accurate logo transfer, while the non-coating area maintains the original rough surface with design patterns (Ra>0.4μm) for aesthetic appearance. This local differentiation resolves the contradiction by allowing both smooth coating regions and textured design regions to coexist on the same component.
2Shape
If a coating is applied on an outer surface with large height difference, then design and functionality are improved, but coating transfer accuracy and durability are deteriorated
Solution Approach 1:
The invention creates a local smooth zone within the coating area by controlling the mold surface roughness to Ra≤0.4μm, while maintaining the overall rough surface with design patterns in the non-coating area. This allows the coating to be accurately transferred on the smooth local region without compromising the global design appearance.
3Shape
If the outer surface has large height difference for design enhancement, then aesthetic appearance is improved, but coating durability and complete transfer are worsened
Solution Approach 1:
The invention ensures coating durability by creating a localized smooth surface region (Ra≤0.4μm) where the coating will be applied, while the surrounding non-coating areas maintain their rough texture with larger height differences for aesthetic purposes. This local smooth zone prevents coating peeling and ensures complete transfer.
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 solution ensures accurate and durable coating on resin components with reduced visible gaps in glossiness, maintaining the aesthetic appeal and functionality of the electronic device housings.
Implementation Method 1
injecting resin material into the cavity to transfer a shape of the surface to the resin material
Data Source
AI summary
A resin product includes an outer surface. The outer surface includes a first area and a second area. The first area includes a surface pattern including a concave and convex portion having a first difference in height. The second area includes a surface pattern including a concave and convex portion having a second difference in height, larger than the first difference in height. An arithmetic average height of a top of a convex portion of the concave and convex portion having the first difference in height is larger than an arithmetic average height of a top of a convex portion of the concave and convex portion having the second difference in height.