Can End Microgap Holding Web Controlled Opening
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Solution Overview
Problem
Existing can ends often result in spraying, foaming over, or popping when opened, especially with carbonated beverages, due to the sudden release of pressure.
Innovation Solution
The can end features a microgap interrupted by holding webs that connect the closure piece to the surrounding end surface in a bonded manner. When the closure piece is pivoted upward, the initial small opening allows for ventilation, preventing excessive pressure release and subsequent spraying or foaming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the closure piece is completely separated from the surrounding end surface by a continuous microgap, then the opening process is simple and the closure piece can be easily removed, but sudden pressure release causes spraying, foaming over, or popping
Solution Approach 1:
The continuous microgap is segmented into multiple sections by holding webs, creating a controlled opening sequence. The holding webs divide the gap into regions that open at different stages, transforming the single sudden pressure release into multiple smaller, controlled releases that prevent spraying and foaming.
Solution Approach 2:
The holding webs create an initial small opening before complete separation occurs. This preliminary opening action allows pressure to be gradually released in a controlled manner before the closure piece is fully removed, preventing the harmful effects of sudden pressure release.
2Object-generated harmful factors
If the microgap is interrupted by holding webs, then pressure release is controlled and spraying is prevented, but the structure becomes more complex
Solution Approach 1:
The holding webs are formed as integral parts of the closure piece during the same manufacturing process, merging the gap-control function with the closure piece structure itself. This eliminates the need for separate additional holding apparatus while achieving controlled pressure release.
Solution Approach 2:
The holding webs are designed to automatically tear at predetermined locations during the opening process, requiring no external intervention or complex control mechanisms. The structure itself provides the gap control function through its inherent design.
3Reliability
If holding webs are added to control the opening process, then stability and leak-tightness are enhanced, but manufacturing complexity increases
Solution Approach 1:
The holding webs are manufactured as integral parts of the closure piece in the same forming process, combining multiple functions (structural support, gap control, seal maintenance) into a single component. This reduces the number of separate manufacturing steps and assembly operations required.
Data Source
AI summary
A can end comprises a metallic end surface in which an opening is formed that is closed by a closure piece of the metallic end surface, wherein the closure piece is separated from the surrounding end surface by a microgap extending at least sectionally along the margin of the end surface. A first end region of the closure piece is connected to the surrounding end surface via a pivot bearing. The can end further comprises a tear-open member that engages at a second end region of the closure piece, said second region being opposite the pivot bearing. The microgap is interrupted between the first end region and the second end region by at least one holding web via which the closure piece and the surrounding end surface are connected to one another in a bonded manner.