Thin-Walled Metal Container Forming for High-Pressure Stability
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Solution Overview
Problem
Existing methods for manufacturing metallic beverage cans face challenges in reducing material thickness while ensuring reproducible quality and preventing material failure, especially under high internal pressures.
Innovation Solution
A method involving partial forming of sheet material in a second area to increase yield strength, reducing material thickness, and strategically displacing deformation to prevent further thinning during forming processes, using a combination of deep drawing and stretch-slide drawing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the wall thickness of the container is reduced to save material, then material cost is reduced, but the structural integrity and reliability under high internal pressure deteriorates
Solution Approach 1:
The patent applies local quality by creating a transition zone with intermediate wall thickness between the thin wall region and the thick base region. This transition zone is formed by incremental deep drawing, where the wall thickness gradually increases from the thin wall area toward the base, providing localized reinforcement where needed while maintaining thin walls in the cylindrical section to reduce material consumption.
Solution Approach 2:
The patent applies preliminary action by pre-forming the base region with increased wall thickness through incremental deep drawing before the final forming operations. This preliminary thickening of the base region ensures structural integrity under high internal pressure while allowing the cylindrical wall to be formed with reduced thickness for material savings.
2Loss of substance
If the wall thickness is reduced further to save more material, then material cost decreases, but the risk of material failure during forming operations increases
Solution Approach 1:
The patent applies segmentation by dividing the container into distinct zones with different wall thickness characteristics: a thin-walled cylindrical section for material savings, a thickened base region for structural support, and a transition zone with intermediate thickness. This segmentation allows each region to be optimized independently, ensuring manufacturing precision and reproducibility while minimizing overall material consumption.
Solution Approach 2:
The patent applies preliminary action by pre-forming the base region with increased wall thickness through incremental deep drawing operations before final forming. This preliminary thickening ensures that the base region has sufficient material stock to withstand subsequent forming operations and high internal pressures, thereby ensuring manufacturing precision and reproducibility of quality.
3Stability of the object's composition
If additional forming operations are performed on the base region to increase dimensional stability, then the container can withstand high pressure, but the material thickness is further reduced due to additional deformation
Solution Approach 1:
The patent applies preliminary action by performing incremental deep drawing operations to pre-thicken the base region before final forming operations. This preliminary thickening compensates for the material thinning that will occur during subsequent forming operations, ensuring that the base region maintains sufficient thickness and dimensional stability under high internal pressure.
Solution Approach 2:
The patent applies local quality by creating a transition zone with intermediate wall thickness that gradually connects the thin-walled cylindrical section to the thickened base region. This local variation in wall thickness allows the base region to be reinforced for dimensional stability while maintaining thin walls in the cylindrical section, and the transition zone provides a gradual transition that distributes stresses evenly.
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
Enables the production of thin-walled containers with increased dimensional stability and reduced material thickness without compromising structural integrity, even under high internal pressures.
Implementation Method 1
The container is produced at least by deep drawing or stretch-glide drawing along an axial direction
Data Source
AI summary
Method for producing a metallic container (1) from a sheet material (2), the container (1), which is produced at least by deep drawing and/or extrusion along an axial direction (3), having at a first end (4) a base region (5) which at least partially closes the first end (4) and, adjoining the base region (5), a wall region (8) which extends along the axial direction (3) to a second end (6) and is formed circumferentially in a circumferential direction (7).