Cooking Vessel Bottom Pattern for Uniform Non-Stick Oil Distribution
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Solution Overview
Problem
Conventional cooking vessels with concave and convex patterns on the bottom surface face issues such as ink smearing, uneven non-stick effects, and difficulty in maintaining precise patterning, leading to defective products and food sticking due to solid line patterns and uneven oil distribution.
Innovation Solution
A method involving the application of photosensitive paint on a stainless steel plate, followed by a black and white film with dotted line patterns, ultraviolet curing, and immersion in a compound to form concave and convex portions, with a non-stick coating applied only to the concave areas, creating a dotted line hexagonal pattern for enhanced non-stick performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid line pattern is used for concave and convex portions, then the non-stick effect is provided along the lines, but oil distribution becomes uneven and food still sticks in the spaces between lines
Solution Approach 1:
The patent divides the continuous solid line pattern into discrete dotted line segments. Each dot creates a convex portion with a concave space around it, allowing oil to penetrate and distribute evenly across the entire surface rather than being confined to linear paths. This segmentation transforms the oil distribution from line-constrained to area-wide coverage.
Solution Approach 2:
The dotted line pattern creates a porous-like structure with numerous small concave spaces between the convex dots. These spaces act as capillary channels that facilitate uniform oil penetration and distribution across the cooking vessel bottom surface, improving both oil distribution and non-stick performance.
2Ease of manufacture
If silk screen printing is used to form concave and convex portions, then the pattern can be created, but ink smearing occurs and uniform heights cannot be achieved
Solution Approach 1:
The patent replaces the mechanical silk screen printing process with a photolithographic system. Instead of using ink and physical screens that are prone to smearing, the invention uses photosensitive paint applied by spray or dip methods, followed by UV curing through a photomask. This substitution eliminates ink-related manufacturing defects while maintaining pattern formation capability.
Solution Approach 2:
The invention changes the state of the patterning material from ink (liquid that dries and smears) to photosensitive paint (liquid that cures to a solid). By controlling the curing process through UV exposure, the patent achieves precise, smear-free patterns with uniform dimensions. The parameter change from dried ink to cured resin eliminates the smearing problem entirely.
3Reliability
If coating layer is applied to both convex and concave portions, then complete coverage is achieved, but the non-stick effect is reduced on convex portions
Solution Approach 1:
The patent applies different treatments to different regions: the concave portions receive the non-stick coating layer while the convex portions are left uncovered or receive minimal coating. This local differentiation ensures that the coating accumulates in the concave spaces where it provides maximum non-stick benefit, while avoiding excessive coating on convex surfaces that would reduce the non-stick effect.
Solution Approach 2:
Instead of applying coating uniformly across the surface and expecting non-stick performance, the invention inverts the approach by selectively applying coating only to the concave portions. This inversion recognizes that the concave spaces are where oil accumulates and where the coating provides the most benefit, rather than coating the convex surfaces where it would interfere with the non-stick geometry.
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 approach ensures precise and uniform patterning, reduces defective products, and maintains a high non-stick effect by evenly distributing oil and preventing food from sticking, improving cooking vessel performance.
Implementation Method 1
irradiating the film with ultraviolet rays to allow the portions of the paint layer disposed underneath the transparent portions to be cured
Data Source
AI summary
The present invention relates to a cooking vessel and a method for manufacturing the same wherein a plurality of concave and convex portions is protrudingly formed to a shape of a dotted line, not to a shape of a solid line, on the bottom surface of the cooking vessel, thus maximizing a non-stick effect to prevent food from sticking to the bottom surface of the cooking vessel.