Container Pressure Accommodation Area Design
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Solution Overview
Problem
The hot-fill process for bottling liquids causes deformation and stability issues in containers due to pressure changes as the liquid cools, leading to undesirable distortion and challenges in labeling, packaging, and shipping.
Innovation Solution
A container design featuring pressure accommodation areas with flat upper and lower vacuum panels connected by a recess that flexes inward in response to pressure changes, allowing the container to safely accommodate internal pressure changes without drastic deformation, while maintaining stability and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the container is sealed after hot-fill processing, then the liquid can be stored and transported, but pressure changes cause deformation and distortion of the container
Solution Approach 1:
The container body is divided into multiple vacuum panels (first vacuum panel, second vacuum panel, third vacuum panel) separated by recesses. This segmentation allows each panel to independently respond to pressure changes, distributing the deformation across multiple segments rather than allowing uniform distortion of the entire container structure.
Solution Approach 2:
The recesses between vacuum panels are designed with specific geometric characteristics (larger cross-sectional area at the opening, smaller cross-sectional area at the closed end) to concentrate stress locally. This local quality design ensures that pressure changes are managed at specific locations rather than causing widespread deformation throughout the container.
2Ease of manufacture
If the container body is made rigid to maintain shape, then manufacturing and shipping are easier, but the container cannot accommodate pressure changes
Solution Approach 1:
The container incorporates dynamic elements through the recesses that can deform under pressure changes. The recesses are designed to flex inward when internal pressure decreases during cooling, allowing the container to adapt to pressure variations while maintaining overall structural integrity. This dynamic capability enables the container to accommodate pressure changes without requiring complete structural flexibility.
3Adaptability or versatility
If the container deforms to accommodate pressure changes, then internal pressure changes are managed, but labeling and packaging become difficult
Solution Approach 1:
The recesses are strategically positioned and dimensioned to concentrate stress locally at specific points on the container body. By localizing deformation to these recess areas rather than allowing widespread distortion, the majority of the container surface maintains its shape and dimensional stability, thereby facilitating easier labeling and packaging operations.
Solution Approach 2:
The segmented structure with multiple vacuum panels and recesses distributes the deformation across multiple localized regions. This segmentation ensures that no single area of the container undergoes excessive deformation, maintaining overall dimensional stability and making the container more suitable for post-processing operations like labeling and packaging.
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 container design effectively manages internal pressure changes, preventing uncontrollable distortion and ensuring stability during shipment and consumer use, with the pressure accommodation areas concentrating stresses and minimizing deformation in other parts of the container.
Implementation Method 1
the body portion flexes at the recess towards an interior of the container in response to a change in the internal container pressure
Implementation Method 2
the flat upper vacuum panel and the flat lower vacuum panel form a progressively smaller angle at the recess in response to an increasing pressure change
Data Source
AI summary
A container comprising a body portion is provided. The body portion includes a flat upper vacuum panel, a flat lower vacuum panel, and a recess between the flat upper vacuum panel and the flat lower vacuum panel. In response to a change in the internal container pressure, the body portion flexes at the recess towards an interior of the container and the flat upper vacuum panel and the flat lower vacuum panel form a progressively smaller angle at the recess in response to an increasing pressure change.