Multi-Color Cellulose Acetate Spectacle Frame Fabrication
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Solution Overview
Problem
Existing cellulose acetate spectacle frames have a single color outer surface, which does not meet customer demands for diversity, and the manufacturing process results in deformation and increased costs due to the need for later-stage repairs.
Innovation Solution
A method involving a multi-color cellulose acetate sheet with multiple colored layers, where the sheet is baked, pressed using an oil pressing die to move inner layers, ground to highlight the middle layer color, and then precision pressed and cooled to form a spectacle frame, reducing deformation and repair needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the outer ring is cut out after pressing, then the multi-color effect is achieved, but the outer ring deforms and requires repair increasing cost
Solution Approach 1:
The outer ring is cut out before the pressing process rather than after. This preliminary action prevents the outer ring from deforming during pressing, eliminating the need for repair while still achieving the multi-color effect through layer displacement.
Solution Approach 2:
The conventional sequence is inverted: instead of pressing first then cutting the outer ring, the patent cuts the outer ring first then performs pressing. This reversal solves the deformation problem while maintaining the multi-color aesthetic effect.
2Ease of manufacture
If the surface layer is ground off to highlight middle layer color, then color diversity is achieved, but additional processing steps are required
Solution Approach 1:
The pressing process deliberately displaces the color layers by a distance greater than the thickness of the surface color layer. This excessive action causes the middle layer to emerge naturally, eliminating the need for separate grinding operations to highlight the middle layer color.
Solution Approach 2:
By changing the pressing displacement parameter to be greater than the surface layer thickness, the patent achieves automatic exposure of the middle layer color through layer displacement, replacing complex surface grinding operations with a simplified pressing parameter adjustment.
3Ease of manufacture
If conventional pressing is used, then molding is achieved, but uniform color highlighting and pressing are difficult
Solution Approach 1:
The patent employs hydraulic pressing technology to apply uniform pressure across the entire sheet during the pressing process. This ensures uniform displacement of color layers and consistent highlighting效果 throughout the spectacle frame, solving the uniformity problem that plagues conventional pressing methods.
Solution Approach 2:
By precisely controlling the hydraulic pressing parameters including pressure distribution and displacement distance, the patent achieves uniform color layer displacement and consistent aesthetic effect across the entire product, overcoming the limitations of conventional non-uniform pressing.
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 saves working processes, improves product quality, and reduces production costs by uniformly pressing and highlighting colors, avoiding deformation and burrs, thus enhancing the spectacle frame's aesthetic appeal and structural integrity.
Implementation Method 1
placing the multi-color cellulose acetate sheet in an oven for first baking
Implementation Method 2
a multi-color cellulose acetate sheet is firstly baked so that it is soften
Implementation Method 3
the multi-color cellulose acetate sheet placed in an oil pressing die is pressed by an oil pressing machine
Implementation Method 4
enable the second, third, and fourth color layers of the multi-color cellulose acetate sheet to move
Implementation Method 5
A surface layer of the excessively moved portion is ground off or shaved off, so that the color of a middle layer is highlighted
Implementation Method 6
The multi-color cellulose acetate sheet is placed in the cooling liquid for cooling, so that the multi-color cellulose acetate sheet is hardened to achieve the purpose of curing
Data Source
AI summary
A method for fabricating a multi-color cellulose acetate spectacle frame, which includes: baking a multi-color cellulose acetate sheet so that it is soften; pressing so as to enable the second, third, and fourth color layers of the multi-color cellulose acetate sheet to move a distance greater than the thickness of a surface color layer of the multi-color cellulose acetate sheet; grinding off or shaving off a surface layer of the excessively moved portion so that the color of a middle layer is highlighted; baking the multi-color cellulose acetate sheet again so that it is soften; pressing so that the color of the middle layer is highlighted to the surface of the spectacle frame. According to the method for fabricating the multi-color cellulose acetate spectacle frame, the working processes are saved, and the qualification rate of product is improved.