Pressure-Release Lid Seal Structure for Controlled Container Discharge
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Solution Overview
Problem
Existing containers with annular seal portions face issues with unpredictable detachment and vigorous discharge of contents due to varying pressure rates, making it difficult to control the discharge direction and amount.
Innovation Solution
The container design incorporates a detaching seal portion with reverse-oriented annular seals and additional non-detaching seal portions, which are bonded with a higher force to ensure controlled detachment at the detaching seal, limiting the discharge channel width and predicting the discharge direction, while an auxiliary detaching seal portion prevents unintended detachment from external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lid member is sealed over a relatively large area extending along the flanged face entirely in its width direction, then the sealing reliability is improved, but the detachment control becomes difficult and contents may be discharged too vigorously
Solution Approach 1:
The annular seal portion is segmented into multiple regions: a detaching seal portion (first region) that is easily detached, and non-detaching seal portions (second region) that maintain strong sealing. This segmentation allows controlled detachment at specific locations while maintaining overall sealing reliability.
Solution Approach 2:
Different regions of the annular seal portion are given different properties: the detaching seal portion has properties that facilitate easy detachment (e.g., reduced bonding strength, geometric features), while the non-detaching seal portions maintain strong bonding. This local differentiation enables precise control over detachment behavior.
2Manufacturing precision
If an exfoliation guiding portion is provided at the radially inner edge of the flanged face, then the detachment position is guided, but the discharge direction prediction remains difficult when pressure increases rapidly
Solution Approach 1:
The seal portion is divided into a detaching seal portion positioned to receive internal pressure first, and non-detaching seal portions that remain sealed. This segmentation ensures that detachment occurs at a predictable location regardless of pressure increase rate.
Solution Approach 2:
The detaching seal portion is pre-configured with properties that make it susceptible to detachment at lower pressures (e.g., reduced bonding strength, geometric features like reverse-oriented projections). This preliminary preparation ensures controlled detachment before excessive pressure buildup occurs.
3Ease of operation
If the detaching seal portion is designed to detach easily, then the discharge control is improved, but unintended detachment may occur during handling due to external forces
Solution Approach 1:
The seal is divided into detaching and non-detaching portions with distinct bonding characteristics. The detaching portion uses bonding suitable for controlled release, while non-detaching portions use stronger bonding that resists handling forces.
Solution Approach 2:
The bonding parameters (strength, geometry) are changed locally across the annular seal portion. The detaching seal portion has modified bonding parameters that facilitate controlled detachment, while non-detaching portions maintain original strong bonding parameters to prevent unintended detachment during handling.
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
This design ensures a stable and predictable discharge of contents by maintaining the non-detaching seal portions sealed, allowing for easy anticipation of the discharge direction and reducing the amount of contents remaining in the container, while preventing unintended detachment during handling.
Implementation Method 1
a portion of the annular seal portion being detached in response to increase of pressure inside the container body associated with deformation of the container body resulting from application of an external force to a bottom face of the container body
Data Source
Figure 1~2
Figure 3~4
Figure 5(a)~6
AI summary
Provided is a container with which a width and a position of a lid member to be unsealed can be readily made constant, thus making it less likely for contents to be discharged too vigorously and making it easy to predict the discharging direction of the contents. A container body 2 holding the contents and a lid member for closing an opening of the container body 2 are sealed to each other via an annular seal portion 6 formed along a flanged face of the opening. At a specified position of the annular seal portion 6, there is provided a detaching seal portion 6S which is to be detached in response to increase of an inside pressure of the container body 2 associated with deformation of the container body 2 based on an external force. At positions facing each other across the detaching seal portion 6S, there are provided non-detaching seal portions 6D comprised of a plurality of annular seal portions extending along a circumferential direction.