Soup Pot Outer Surface Etching to Prevent Stretching Fractures
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Solution Overview
Problem
Existing manufacturing methods for stainless steel soup pots with concave-convex patterns face issues such as uneven thickness leading to breakage during deep stretching, resulting in low yield and aesthetic concerns like scratches and food debris adhesion.
Innovation Solution
A method involving screen-printing, etching, and nonstick coating to create partial concave-convex patterns on the outer surface, ensuring uniform thickness and preventing fractures during deep stretching, while allowing for a polished smooth upper part for better decoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If concave-convex patterns are created by deep stretching a plane blank with varying thickness, then the outer surface gains patterned texture for heat transfer and scratch prevention, but the uneven thickness causes breakage at junctions during deep stretching
Solution Approach 1:
The patent applies preliminary action by etching the entire plane blank (including areas that will become convex patterns) before the deep stretching process. This pre-etching ensures uniform thickness distribution across the blank, eliminating the thickness variations that would cause breakage during subsequent forming operations. The etching step prepares the material in advance to prevent future failures.
Solution Approach 2:
The patent segments the processing steps into distinct phases: first etching the entire surface to ensure uniform thickness, then selectively removing ink from specific areas, and finally performing deep stretching. This segmentation allows each step to be optimized independently, ensuring the blank has uniform properties before forming the concave-convex patterns through stretching.
2Reliability
If the entire plane blank is etched to ensure uniform thickness, then the thickness uniformity prevents breakage during stretching, but the cost and complexity of the etching process increases
Solution Approach 1:
The patent applies local quality by using screen-printed ink masks to selectively protect only the areas where convex patterns should form. The etching process is applied uniformly to the entire blank, but the ink masking creates local differentiation, allowing the convex areas to retain original thickness while concave areas are etched. This reduces the need for complex selective etching while achieving the desired thickness distribution.
3Shape
If a polished smooth upper part is added to the patterned lower part for decorative effect, then the aesthetic appearance improves, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different regions of the pot body. The upper part receives a polished finish for aesthetic purposes, while the lower part retains the concave-convex patterned texture for functional benefits. This localized differentiation of surface properties allows both decorative and functional requirements to be met simultaneously.
Solution Approach 2:
The patent segments the surface treatment into two distinct zones: a polished upper portion and a patterned lower portion. This segmentation is achieved through the screen-printing and selective etching process, where ink masks define the boundaries between different surface treatments. Each zone can be processed and finished independently to optimize its specific function.
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
The method enhances yield by preventing fractures and allows for a decorative surface with concave-convex patterns on the lower part and a polished upper part, improving heat transfer and cleaning ease.
Implementation Method 1
step S2: screen-printing a layer of ink with preset patterns on a surface of the plane blank of the pot body
Implementation Method 2
drying and curing the ink
Implementation Method 3
step S4: etching at positions where no patterns occur on the top surface and the bottom surface of the plane blank of the pot body
Implementation Method 4
step S6: spraying a nonstick pan coating on the top surface of the plane blank of the pot body
Implementation Method 5
polishing with abrasive paper at positions where the convex patterns occur
Data Source
AI summary
The invention discloses a manufacturing method for a soup pot with partial concave-convex patterns on an outer surface thereof. The method comprises: preparing a plane blank for forming a pot body; screen-printing a layer of ink with preset patterns on a surface of the blank of the pot body; screen-printing a layer of ink with preset patterns on a bottom surface of the blank of the pot body; etching at positions where no patterns occurs on the surface of the blank of the pot body; stretching the blank of the pot body to form a soup pot, and flashing the edge of the pot body; and spraying a nonstick pan coating on the blank of the pot body, and polishing with abrasive paper at positions where the convex patterns occur and where no pattern occurs.