Folded Rim Packaging with Annular Locking Elements
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Solution Overview
Problem
Injection moulded containers often face difficulties in being easily removed from the mould while maintaining good sealing and locking properties, which can lead to poor design efficiency and potential leakage during use.
Innovation Solution
The design incorporates annular locking elements on both the container and lid, with a foldable rim portion that allows easy mould removal and secure engagement, along with a lid lever for easy opening, and additional features like a flange element for enhanced sealing during shaking operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If annular locking elements are added to the container rim to improve sealing and locking properties, then sealing ability and locking strength are improved, but the container becomes more difficult to remove from the injection mould
Solution Approach 1:
The rim portion is designed as a dynamic structure that can change its configuration between moulding and ejection phases. During injection moulding, the rim portion is in a first configuration that allows easy removal from the mould. After ejection, the rim portion is deformed into a second configuration where the annular locking elements engage with the lid, providing secure sealing and locking.
Solution Approach 2:
The physical state and geometry of the rim portion are changed between two distinct configurations. In the first configuration (during moulding), the rim has a geometry optimized for mould ejection. In the second configuration (after ejection), the rim is deformed to create engaging locking elements that provide strong sealing and locking functionality.
2Reliability
If secure locking means are provided to ensure the lid remains firmly seated during drops, then reliability under impact is improved, but the device complexity increases
Solution Approach 1:
The sealing function and locking function are merged into a single integrated structure. The annular locking elements serve dual purposes: they provide sealing by engaging with the lid's corresponding features, and they provide mechanical locking to prevent lid detachment during impact or drops, eliminating the need for separate sealing and locking mechanisms.
Solution Approach 2:
The rim portion and its annular locking elements are designed as a multi-functional component that simultaneously provides sealing, locking, and impact resistance functions. This universal design allows a single structure to perform multiple critical functions, reducing overall device complexity while improving reliability under various conditions including drops and shaking.
Data Source
AI summary
An injection moulded packaging comprising a container and a lid, the peripheral rim portion of the lid being arranged to engage with the rim portion of the container to seal the container. The rim portion of the container has a first annular locking element arranged on the outside surface and a second annular locking element arranged on the inside surface. The peripheral rim portion of the lid having a first surface being arranged with a first annular locking element which engages with the first locking element of the container rim and a second surface being arranged with a second annular locking element which engages with the second locking element of the container rim.