Electronic Device Casing Decorative Material Selective Removal
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Solution Overview
Problem
The existing methods for painting selected areas on electronic device casings, which combine metal and plastic materials, are inaccurate and costly due to the need for precise masks and alignment, leading to inefficiencies and mask degradation from paint accumulation.
Innovation Solution
A manufacturing method where a decorative material is applied to both material regions of an electronic device casing, with a tape used to selectively remove the material from the second region based on differing adhesive forces, eliminating the need for precise masks and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mask is used to cover the metallic material area and paint the plastic material area, then the decorative material can be applied to the selected area, but the manufacturing precision deteriorates due to mask dimension errors, alignment errors, and mask degradation from paint accumulation
Solution Approach 1:
The patent extracts the masking step entirely from the process. Instead of using a physical mask to define the painting area, the method applies decorative material to the entire casing surface first, then selectively removes it from the metallic area using a removal agent. This eliminates mask dimension errors, alignment errors, and mask degradation issues completely.
Solution Approach 2:
The patent inverts the traditional painting approach. Instead of applying decorative material only to the plastic area while protecting the metallic area with a mask, the method applies decorative material to both areas and then removes it from the metallic area. This inversion eliminates the need for precise mask alignment and dimension control.
2Ease of manufacture
If a mask is used for painting the plastic material area, then the metallic area is protected from paint, but the process cost increases due to mask manufacturing and the need for accurate alignment
Solution Approach 1:
The patent removes the masking step from the manufacturing process entirely. By applying decorative material to the entire surface and then selectively removing it from the metallic area using a chemical removal agent, the method eliminates the need for mask manufacturing, alignment procedures, and quality control of mask positioning.
Solution Approach 2:
The patent introduces a removal agent as an intermediary substance that selectively removes decorative material from the metallic area. This chemical mediator enables precise area selection without requiring physical masks, simplifying the manufacturing process while maintaining high precision.
3Productivity
If traditional painting with mask is used, then the plastic area is decorated and protected, but productivity decreases due to the multi-step process and mask preparation time
Solution Approach 1:
The patent merges the decoration of both plastic and metallic areas into a single step by applying decorative material to the entire casing surface at once. The selective removal of decorative material from the metallic area follows as a simple additional step, eliminating the need for separate masking, painting, and mask removal operations.
Solution Approach 2:
The patent extracts the time-consuming mask preparation and alignment steps from the painting process. By using a chemical removal agent to selectively remove decorative material from the metallic area, the method significantly reduces process time and complexity while maintaining 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 process and reduces costs by allowing for accurate and efficient removal of decorative material from the second material region while maintaining it on the first region, enhancing the visual appearance without the need for precise masking.
Implementation Method 1
the adhesive force between the decorative material and the first material region is greater than the adhesive force between the decorative material and the second material region
Implementation Method 2
adhering a tape on the decorative material, followed by tearing off the tape to remove the decorative material located at the second material region
Data Source
AI summary
A casing of an electronic device and a manufacturing method thereof are provided. The manufacturing method of casing of the electronic device includes following steps: providing a casing body, in which the surface of the casing body includes a first material region and a second material region, and the materials of the first material region and the second material region are different from each other; providing a decorative material on the surface of the casing body, in which the decorative material overlays whole the first material region and at least partial the second material region; and adhering a tape on the decorative material, followed by tearing off the tape to remove the decorative material located at the second material region but remain the decorative material located at the first material region.