Can End Reinforcing Bead for Buckling Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing can ends for two-piece beverage containers lack sufficient strength while using excessive metal, and there is a need to reduce metal usage while maintaining strength and preventing buckling.
Innovation Solution
Incorporating a novel annular reinforcing bead on the circumferential wall of the can end, which can be convex or concave, to enhance the structural integrity and allow for a reduction in metal thickness or volume without compromising strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the amount of metal in the blank is reduced, then the weight and material usage decrease, but the strength and buckling resistance of the can end deteriorates
Solution Approach 1:
The patent applies curvature by forming a bead (convex or concave) on the circumferential wall of the can end. This bead creates a curved reinforcement structure that increases stiffness and strength locally, allowing the overall metal thickness to be reduced while maintaining structural integrity. The curved geometry of the bead provides mechanical reinforcement without requiring additional metal volume.
Solution Approach 2:
The patent implements local quality by placing a bead (convex or concave) at specific locations on the circumferential wall rather than uniformly thickening the entire structure. This localized reinforcement provides the necessary strength and buckling resistance only where needed, allowing other areas to use less metal, thereby reducing overall weight while maintaining required strength levels.
2Loss of substance
If the metal thickness is reduced, then the material usage decreases, but the buckling resistance of the circumferential wall deteriorates
Solution Approach 1:
The bead formation (convex or concave) introduces curvature into the circumferential wall structure. This curved geometry inherently provides better buckling resistance compared to a flat wall of the same thickness, as the curvature distributes stresses more effectively and prevents localized buckling failures, allowing for reduced metal usage while maintaining stability.
Solution Approach 2:
The patent adds a dimensional feature (the bead) that protrudes from or recesses into the circumferential wall, creating a three-dimensional reinforcement structure. This additional dimensionality provides structural support and buckling resistance without requiring increased wall thickness, thereby reducing metal consumption while maintaining stability.
3Strength
If reinforcing structures are added to the can end, then the strength increases, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The bead reinforcement uses simple curved geometry (convex or concave) that can be formed using standard forming tools and processes. This curved structure provides effective strength enhancement without requiring complex multi-component assemblies or sophisticated manufacturing steps, keeping device complexity manageable while achieving the desired strength improvement.
Data Source
AI summary
A can end for a two-piece beverage can is described. The can end has a center panel positioned about a vertical center axis. The center panel has a means for opening the can end located on a public side. A circumferential strengthening member is located about the center panel. A wall extends upwardly from the circumferential strengthening member. A curl is joined to an upper end of the wall. The curl defines an outer perimeter of the can end. A reinforcing bead is located on the wall between an uppermost portion of the wall and a lowermost portion of the wall.