Packaging Seal Protrusion Groove Dimensional Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional packaging sealing systems often fail to provide a reliable and consistent seal, especially when minor dimensional differences occur between the cap and container, leading to potential leakage and compromised moisture-tight environments.
Innovation Solution
The proposed sealing system employs a combination of a protrusion and groove configuration between the cap and container, where the protrusion and groove contact along their radial sides to form a primary seal, and an additional seal is created between the cap's skirt and container's rim using a channel and bead design, ensuring alignment and maintaining contact for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing system is used between cap and container, then the structure is simple, but the seal reliability deteriorates due to dimensional differences causing leakage
Solution Approach 1:
The sealing system is divided into two independent sealing mechanisms: a first seal comprising a protrusion on the cap received by a groove on the container body, and a second seal comprising a channel on the cap and a bead on the container body. This segmentation allows each seal to independently compensate for dimensional variations, significantly improving seal reliability without requiring excessive complexity in any single sealing mechanism.
2Adaptability or versatility
If the cap and container have precise dimensional matching to ensure seal, then the manufacturing precision is improved, but the adaptability deteriorates due to inability to compensate for dimensional variations
Solution Approach 1:
The sealing system utilizes geometric parameter variations in the protrusion, groove, channel, and bead structures to compensate for dimensional differences. The protrusion fits within the groove with radial clearance, and the bead engages the channel with similar tolerance accommodation, allowing the system to adapt to manufacturing variations while maintaining effective sealing contact.
3Reliability
If a single seal is used between cap and container, then the device complexity is reduced, but the sealing effectiveness deteriorates due to insufficient compensation for dimensional differences
Solution Approach 1:
The dual-seal design provides redundant sealing capability that compensates for dimensional variations before they can cause leakage. The first seal (protrusion-groove) and second seal (channel-bead) are positioned to work together, with each seal capable of independently accommodating tolerance stack-ups, thereby cushioning against potential sealing failures that would occur with a single seal mechanism.
Data Source
AI summary
A packaging assembly includes a container body defining an interior for housing a product and an opening leading to the interior. The assembly further includes a cap that moves with respect to the container body to move the assembly between a closed position in which the cap covers the opening, and an opened position in which the opening is exposed. A first seal (40) is defined between the container body and the cap. The first seal includes a protrusion (42) formed on one of the container body about the opening or the cap, and a groove (44) formed on the other of the container body about the opening or the cap. The protrusion is received by the groove when the assembly is in the closed position, such that contact is maintained in a sealing relationship around the opening between the groove and the protrusion.