Spectacle Frame Components via Resin-Impregnated Film Moulding
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Solution Overview
Problem
Existing methods for producing spectacle frame components using multi-layer structures with textiles and fibres are complex, time-consuming, and limited in aesthetic effects due to visibility issues with fibres and fibre textiles, which restrict the choice of decorative materials.
Innovation Solution
A method involving the superimposition of a plastic film, a resin-impregnated semi-finished element, and another plastic film in a mould, followed by polymerization and additional layer formation, allowing for increased thickness and dimensional stability while maintaining flexibility and aesthetic appeal by using transparent or non-transparent films and resins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multi-layer structures with fibres and fibre textiles are used to improve strength and robustness, then the structural characteristics are improved, but the production time increases and the aesthetic effects are limited due to visibility of fibres
Solution Approach 1:
The semi-finished element is pre-impregnated with resin before being placed in the mould, which prepares the material in advance for the moulding process. This preliminary impregnation reduces the complexity and time of the subsequent moulding operation, as the resin is already distributed in the fibre structure before final assembly.
Solution Approach 2:
The invention combines the semi-finished element (fibre reinforcement) with films of plastic material and resin in a single integrated moulding process. This merging of multiple components into one unified structure eliminates the need for separate assembly steps, reducing production time while maintaining structural robustness.
2Illumination intensity
If decorative textile sheets with high transparency are used to improve aesthetic effects, then the visual appearance is enhanced, but the fibres and fibre textiles become visible through the textile layers
Solution Approach 1:
The invention uses films of plastic material as intermediary layers between the decorative textile sheet and the fibres. These films act as a visual barrier that prevents the fibres from showing through the transparent or translucent decorative textile, thereby maintaining both the aesthetic transparency and the structural integrity.
Solution Approach 2:
Different layers in the multi-layer structure have different optical properties. The decorative textile sheet provides transparency and aesthetics in certain areas, while the plastic films and resin provide opacity and fibre concealment in other areas. This local differentiation of material properties allows simultaneous achievement of transparency and fibre hiding.
3Strength
If multiple layers of fibres and fibre textiles are deposited in the mould to improve strength, then the structural robustness is enhanced, but the device complexity and production time increase
Solution Approach 1:
The invention uses a composite structure combining semi-finished fibre elements with plastic material films and resin. This composite approach provides structural robustness through the fibre reinforcement while the plastic films simplify the overall construction, reducing the need for multiple separate fibre layers and their associated handling complexity.
Solution Approach 2:
The films of plastic material serve as temporary structural supports during the moulding process that are later removed or integrated. These films simplify the production process by providing easy-to-handle, disposable layers that facilitate the moulding operation without requiring complex multi-layer fibre assembly.
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 enables the production of spectacle frame components with enhanced strength, robustness, and customizable deformability, achieving faster and more repeatable production cycles with improved aesthetic and mechanical properties.
Implementation Method 1
closing and heating the first mould, the moulding temperature and pressure being applied and maintained until the resin is fully polymerized
Data Source
Figure 1
Figure 2~4
AI summary
A method is described for making frame components for spectacles, comprising the following steps : - superimposing within a first mould (11), in the following order, at least a first film (12) of plastic material, at least one semi-finished element (13) pre- impregnated with resin, and at least a second film (14) of plastic material, - closing and heating the first mould (11), the moulding temperature and pressure being applied and maintained until the resin is fully polymerized, in order to produce an intermediate component (15) containing the semi-finished product (13), - opening the first mould (11) and extracting the intermediate component (15) from the first mould, - placing the intermediate component (15) in a second mould (16), - closing the second mould (16) and forming a layer (17) of polymer material on the intermediate component (15), resulting in mutual adhesion, - opening the second mould (16) and extracting an article (18) that has been produced by the moulding step in the second mould (16), - cutting the article (18) so as to define the final profile of the frame component.