Method for manufacturing double-layer fair mugs
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Solution Overview
Problem
Traditional methods for manufacturing fair mugs result in poor thermal insulation performance due to a large contact area between the shell and liner, leading to premature cooling of liquids, and the stamping process often causes burrs and scratches on the inner wall of the water outlet, reducing production efficiency and quality.
Innovation Solution
A method for manufacturing double-layer fair mugs involves processing a shell and a liner separately, then welding them together with an insulation layer, using a specialized water outlet form equipment that applies horizontal pressure to minimize burrs and scratches, and creating a groove and vacuum hole to reduce contact area and enhance insulation, allowing for better heat retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the lower end liner of the water outlet fitting is pressed directly to the shell through stamping, then the water outlet is formed, but the contact area between shell and liner becomes too large causing thermal insulation performance to deteriorate
Solution Approach 1:
The water outlet formation process is segmented into two independent stages: first forming the water outlet shape, then separately controlling the contact area between shell and liner. This allows the water outlet to be formed without excessive pressing that would increase contact area and compromise thermal insulation.
Solution Approach 2:
The stamping direction is changed from vertical pressing to horizontal direction pressing. This dimensional change allows the water outlet to be formed while minimizing the contact area between the lower end liner and shell, thereby maintaining thermal insulation performance.
2Productivity
If vertical direction stamping is used to form the water outlet, then the outlet is created, but burrs and scratches appear on the inner wall reducing product quality
Solution Approach 1:
The stamping direction is inverted from the conventional vertical direction to a horizontal direction. This reversal of the stamping approach allows the water outlet to be formed without causing burrs and scratches on the inner wall, eliminating the need for post-processing polishing while maintaining production efficiency.
3Strength
If the lower end liner fits tightly to the shell, then structural strength is improved, but temperature transfer increases causing rapid cooling
Solution Approach 1:
The contact between shell and liner is made non-uniform: the water outlet area has controlled contact for structural integrity, while the surrounding areas maintain minimal contact to prevent heat transfer. This local differentiation allows structural strength to be maintained where needed while preserving thermal insulation where contact occurs.
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 improves thermal insulation performance by reducing the contact area between the shell and liner, minimizing burrs and scratches, and enhancing structural strength, resulting in more efficient and higher-quality production of fair mugs with improved heat preservation.
Implementation Method 1
a groove and a vacuum hole to reduce contact area and enhance insulation
Data Source
AI summary
A method for manufacturing double-layer fair mugs is disclosed, including steps of a shell processing, a liner processing, and a cup body processing. The liner processing forms an inwardly concave welding surface, and the cup body processing is performed by adopting a water outlet form equipment to stamp horizontally to obtain a water outlet, and then the cup body is taken out and vacuumed to obtain a double-layer fair mug. The cup body is only subjected to a horizontal force, which can avoid more burrs and scratches on an inner wall of the water outlet and thereby improving quality of finished products and production efficiency.