Plique-à-Jour Enamel Manufacturing Through Substrate Grinding
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Solution Overview
Problem
Traditional plique-à-jour enamel techniques are limited by warping or detachment of metal partitions, require substrates for containment, are difficult to apply on non-planar forms, and result in fragile, thin layers, making mass production of plique-à-jour articles costly and impractical.
Innovation Solution
A manufacturing process involving deposition of enamel layers on a defined substrate, followed by machining and polishing, allowing for thick layers and complex shapes, with simultaneous grinding of substrate and enamel to achieve robust and translucent decorations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plique-à-jour technique with metal partitions is used, then the enamel decoration can be created, but the metal partitions warp or detach during firing, limiting the number of firings and design range
Solution Approach 1:
The invention removes the metal partition element entirely from the traditional plique-à-jour technique. Instead of using metal partitions to contain the enamel, the process uses a single continuous firing cycle without any partition structures, thereby eliminating the warping and detachment problems associated with metal partitions while enabling greater design freedom and multiple firing cycles.
Solution Approach 2:
The invention changes the firing parameters from multiple successive firings with metal partitions to a single continuous firing cycle. This parameter change allows the enamel to be applied and fired in one process step, avoiding the cumulative thermal stress that causes metal partition failure and enabling more complex designs to be created in a single firing.
2Reliability
If substrates made of quartz are used to contain the glaze, then the glaze can be prevented from running, but the process becomes very difficult on non-planar forms
Solution Approach 1:
The invention eliminates the quartz substrate containment method from the process. Instead of applying enamel over a quartz substrate that prevents glaze running, the new process allows the enamel to be applied directly and contained by the geometry of the piece itself during a single firing cycle, making the process adaptable to non-planar and three-dimensional forms.
Solution Approach 2:
Rather than using a substrate to contain the glaze from the outside, the invention inverts the approach by allowing the glaze to contain itself through the firing process and geometry, without requiring an external quartz substrate. This inversion enables application on complex and non-planar surfaces.
3Ease of manufacture
If traditional hand application of glaze with brush or oil pick is used, then the glaze can be applied, but the layers are very thin requiring dozens of layers to achieve less than 0.5 mm thickness, resulting in fragile enamel
Solution Approach 1:
The invention replaces the manual mechanical application method (brush or oil pick) with a spray application system. This mechanical substitution allows for the deposition of much thicker enamel layers in a single application, eliminating the need for dozens of thin layers and resulting in more robust enamel with thickness of 0.5 mm or more.
Solution Approach 2:
The invention changes the application parameters from thin manual layers to thick spray-deposited layers. By controlling the spray deposition process, the enamel can be applied in thick layers that achieve the desired thickness in fewer applications, significantly improving the robustness and reducing the fragility of the final enamel decoration.
4Reliability
If traditional plique-à-jour technique is used, then the enamel decoration can be created, but the technique is tedious and difficult to reproduce, preventing mass production at low cost
Solution Approach 1:
The invention segments the traditional complex multi-step process into a simplified single-firing process. By eliminating the need for metal partitions, multiple successive firings, and substrate removal steps, the process becomes a streamlined sequence that can be easily reproduced and scaled for mass production while maintaining enamel decoration quality.
Solution Approach 2:
The invention creates a continuous single-firing process that eliminates the interruptions and multiple cycles required by traditional methods. This continuous action allows for efficient production flow, reducing production time and cost while maintaining the quality of the enamel decoration, thereby enabling mass production.
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
Enables large-scale, cost-effective production of plique-à-jour enamel articles with enhanced robustness and design flexibility, suitable for high-stress applications, and allows for gradients and finishes like translucent-opaque transitions.
Implementation Method 1
Deposition of one or more layers of enamel within the non-extendable decoration and firing of the enamel after each layer deposition
Implementation Method 2
Machining, preferably by grinding, of the bottom face to reveal the enamel
Implementation Method 3
The protruding decoration is then polished. Polishing the enamel also eliminates the need to refire the piece to achieve its final glossy and translucent appearance
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 1e
AI summary
The invention relates to a method for manufacturing an article (1) comprising a through-decoration (2) filled with an enamel (3) to form a so-called plique-à-jour enamel, the method comprising the steps of: - Providing a blank (5) defined with an upper face (5a) and with a lower face (5b) opposite the upper face (5a); - Removing part of the blank (5) at the level of the upper face (5a) to create a decoration that is not through-decoration (2a) on the lower face (5b) or, alternatively, at the previous step, providing said blank (5) directly furnished with the non-through decoration (2a); - Depositing one or more layers of enamel (3) within the non-through decoration (2a) and firing the enamel (3) after each layer deposition; - Machining, preferably by grinding, of the lower face (5b) to reveal the enamel (3) and thus produce the article (1) with the open decoration (2) filled with enamel (3).