Two-Material Timepiece Dial Appliques With Machined Finishes
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Solution Overview
Problem
Existing methods for producing appliques for timepiece dials using two different materials struggle to achieve optimal finishes and complex geometries, limiting the ability to create sophisticated designs.
Innovation Solution
A method involving the formation of a blank with a first material, partial insertion of a second material, and subsequent machining to shape and surface the blanks, allowing for the creation of appliques with varied three-dimensional shapes and optimal finishes using different materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a mold is used to cast a second liquid material in a first material, then the production process is simple, but the ability to obtain all possible geometries and sophisticated finishes is limited
Solution Approach 1:
The production process is divided into two distinct phases: first forming the blank with the first material, then separately forming the second material within or partially within the first blank, and finally machining both materials. This segmentation allows each material to be optimized independently while achieving complex geometries and sophisticated finishes that would be impossible with a single casting process.
Solution Approach 2:
The first blank is formed in advance before the second material is added. This preliminary action allows the first material to be prepared with the correct base geometry, enabling subsequent steps to focus on adding complexity through the second material and precise machining operations.
2Productivity
If traditional casting methods are used, then production is straightforward, but optimal finishes and complex geometries cannot be achieved
Solution Approach 1:
The invention merges the advantages of casting (for the first blank) with the precision of machining (for both materials). By combining these methods in a sequential process, the patent achieves both production efficiency and the ability to create optimal finishes and complex geometries that neither method could achieve alone.
Solution Approach 2:
The patent changes the production parameters by transitioning from a single-casting process to a multi-phase process involving different materials and machining operations. This parameter change enables the achievement of sophisticated finishes and complex geometries while maintaining reasonable production efficiency.
3Adaptability or versatility
If two different materials are combined in an applique, then design versatility is improved, but the difficulty of achieving impeccable appearance increases
Solution Approach 1:
The patent applies local quality by allowing different materials to be used in different portions of the applique, each optimized for its specific function and aesthetic requirements. The machining phase then ensures that the interface between materials and the overall appearance meet impeccable standards, resolving the contradiction between design versatility and appearance quality.
Data Source
AI summary
A method for producing an applique (1; 1′; 1″) for a timepiece dial, the applique (1; 1′; 1″) having at least two distinct portions (10, 20; 10′, 20′; 10″, 20″) made of a first material and a second material, respectively, the first and second materials being different, wherein the method includes a first phase (E1 to E4; E1′ to E4′) involving forming at least a second blank (20a; 20a′) made of the second material within or at least partially within a first blank (10a; 10a′) made of the first material so as to obtain a blank (1a; 1a′) of the applique for a timepiece dial, then a second phase of machining (E5, E6; E5′, E6′) each of the two blanks (10a, 20a; 10a′, 20a′), so as to modify the shape and/or the surface state of each of the first and second blanks of the applique blank (1a; 1a′).