Two-Tone Ceramic Casing Assembly With Groove-Locked Metal Joining
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Solution Overview
Problem
Existing methods for producing two-tone ceramic components, such as watch bezels, face challenges in achieving clear demarcation between colors without being prone to scratches and are complex to implement, leading to suboptimal aesthetic and mechanical properties.
Innovation Solution
A method involving the assembly of two elements with distinct materials and/or colors, using grooves machined on the elements and filling these grooves with an at least partially amorphous metallic material or electroforming a metallic material, to create a strong and aesthetically pleasing connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If surface treatments such as painting or vapor deposition are applied to ceramic components to achieve different appearances, then aesthetic appearance is improved, but the surface becomes prone to scratches and revealing the underlying material
Solution Approach 1:
The component is divided into multiple segments (first element and second element) with different materials or colors, joined together to form a multi-tone component. This segmentation allows each element to maintain its inherent aesthetic properties without requiring protective surface coatings, thereby preserving scratch resistance while achieving visual differentiation.
2Shape
If bi-injection of two ceramic materials is used to produce two-color components, then color variety is improved, but manufacturing complexity increases and clear demarcation between colors becomes difficult to obtain
Solution Approach 1:
Instead of attempting to create multi-color components through complex single-piece injection molding, the invention segments the component into separate elements that are manufactured individually with simpler processes, then assembled together. This approach achieves color variety while avoiding the manufacturing complexity and demarcation issues inherent in bi-injection techniques.
3Ease of manufacture
If elements of different colors are assembled by gluing butted portions, then production simplicity is improved, but mechanical strength and fragility are worsened
Solution Approach 1:
The invention uses composite material technology by combining ceramic elements with a metallic joining material that forms an alloy intermetallic compound at the junction zones. This composite approach maintains production simplicity while dramatically improving mechanical strength, as the metallic joining material creates strong metallurgical bonds between ceramic elements rather than relying on weak adhesive gluing.
4Ease of operation
If gluing operations are used to assemble elements, then ease of assembly is improved, but assembly precision and delicacy are worsened for larger dimensions
Solution Approach 1:
The metallic joining material that forms alloy intermetallic compounds provides both ease of assembly and high precision. The material flows into grooves machined in the ceramic elements and forms strong metallurgical bonds, eliminating the need for delicate gluing operations while ensuring precise alignment and strong mechanical connection, especially for larger dimensional elements.
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 allows for the production of components with clear color demarcation and enhanced mechanical strength, while maintaining optimal aesthetic and physical properties, thus addressing the limitations of previous techniques.
Implementation Method 1
introducing a third connecting element into the first and second grooves by blocking
Implementation Method 2
electroforming a metallic material
Data Source
Figure 1~7
Figure 8~10
AI summary
The invention relates to a method of assembling at least a first element and a second element to form, when assembled, a casing component for a portable device, comprising at least the steps of: a) manufacturing the first element; b) manufacturing the second element; c) providing at least one first groove in the first element and at least one second groove in the second element; d) joining and holding the first element and the second element together by means of at least one third connecting element which is inserted in a locking manner into the first and second grooves.