Container Cap with Segmented Groove Projections
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Solution Overview
Problem
Caps for containers face issues where small or flat products can get stuck in the peripheral groove between the sealing skirt and the inner peripheral wall, leading to sealing failures and desiccant leakage, and existing solutions either compromise airtightness or increase manufacturing costs.
Innovation Solution
A cap design featuring integrally formed projection portions that cover the peripheral groove between the sealing skirt and the inner peripheral wall, either through injection molding or other strong connections, maintaining flexibility and airtightness while preventing product entry into the groove.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the peripheral groove is filled to provide a connection between the sealing skirt and the inner peripheral wall, then the structural integrity is improved, but the sealing skirt loses its flexibility required for providing an air-tight connection
Solution Approach 1:
The peripheral groove is divided into multiple segments by projecting portions that extend into the groove. These projecting portions are spaced apart to create gaps, allowing the sealing skirt to maintain flexibility while still providing structural connection points. The segmentation approach prevents complete filling of the groove, balancing integrity and flexibility requirements.
Solution Approach 2:
The projecting portions are strategically positioned at specific locations within the peripheral groove rather than filling the entire groove continuously. This local presence provides structural reinforcement where needed while leaving other areas open to maintain sealing skirt flexibility. The local quality approach allows different regions to serve different functions.
2Object-affected harmful factors
If a cardboard is used to cover the peripheral groove, then product entry into the groove is prevented, but the sealing skirt deformation during fitting can cause cardboard deformation and desiccant leakage
Solution Approach 1:
The projecting portions are integrally formed with the sealing skirt as a single molded piece, eliminating the separate cardboard component used in prior art. This integration ensures that the projecting portions move together with the sealing skirt during deformation, preventing relative motion that would cause folding or loosening. The merged structure maintains both groove coverage and sealing reliability.
Solution Approach 2:
The sealing skirt is made from a flexible polymer material that provides both the necessary flexibility for air-tight sealing and sufficient structural strength to maintain the shape of projecting portions during deformation. This composite material approach replaces the cardboard-polymer combination with a unified flexible polymer structure that avoids the deformation issues of cardboard.
3Ease of manufacture
If the sealing portion is positioned close to the lower end of the sealing skirt, then manufacturing is simplified, but the sealing portion is degraded during the crimping process
Solution Approach 1:
The projecting portions are pre-formed during the injection molding process at their final positions within the peripheral groove. This preliminary formation ensures that the sealing portion is already in its correct position and configuration before the crimping process begins, allowing the crimping to occur without degrading the sealing portion. The preliminary action protects the sealing integrity while maintaining manufacturing efficiency.
Data Source
AI summary
Disclosed is a cap for a container and a container comprising such cap. This container typically accommodates loosely stored, solid products, such as strips, pills, tablets or the like. The cap includes a lid body with a top part and a peripheral wall, wherein the lid body includes a sealing skirt and an inner peripheral wall, which extend from the top part, and form a peripheral groove in between. At least one projection portion for partially covering the peripheral groove is integrally formed with the sealing skirt and the inner peripheral wall.