Thinned Metal Can End with Variable Thickness Profile
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Solution Overview
Problem
Traditional metal can ends require uniform thickness to prevent rupture during heating and transport, leading to excess material usage and increased manufacturing costs, as they are not optimized to reduce material at less vulnerable points.
Innovation Solution
A multi-thickness one-piece metal can end is designed with varying thicknesses, where the annular formation and ridged portions are thicker than the circular panel, allowing for a reduction in material usage while maintaining strength at weak points, formed from a single sheet of metal with a double seam configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If uniform thickness is used throughout the can end, then structural strength is maintained, but material consumption increases
Solution Approach 1:
The can end is designed with varying thickness across different regions: the central panel has the greatest thickness to withstand internal pressure, the annular ridge has intermediate thickness for structural support, and the outer flange has the least thickness as it requires minimal strength. This non-uniform thickness distribution optimizes material usage while maintaining necessary structural integrity at each location.
2Ease of manufacture
If material is reduced at less vulnerable points, then manufacturing costs decrease, but structural integrity may be compromised
Solution Approach 1:
The design strategically thins the metal only in regions where structural demands are lower (outer flange and portions of the annular ridge), while maintaining full thickness in the central panel where internal pressure creates the highest stress. This localized material reduction lowers manufacturing costs without compromising the can end's ability to contain pressurized contents.
3Loss of substance
If the can end is formed from a single sheet of metal with varying thickness, then material efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The can end is divided into three distinct functional zones (central panel, annular ridge, and outer flange) with different thickness requirements. This segmentation allows each zone to be optimized independently for its specific structural role while being formed from a single sheet of metal through progressive forming operations, balancing material efficiency with manufacturing feasibility.
Data Source
AI summary
A thinned metal can end having a non-uniform thickness profile is provided. The can end has a central panel having at least a first thickness, a middle portion having at least a second thickness greater than the first thickness, and an end portion having at least a third thickness greater than the first and second thicknesses. The can end is configured to be joined to a can wall by a double seam.