Removable Inner Vessel Coupling for Double-Wall Containers
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Solution Overview
Problem
Existing double containers face issues with the coupling of internal and external vessels due to differing tolerances between molding and blowing techniques, making it difficult to achieve a removable internal vessel for refilling or waste sorting.
Innovation Solution
A container design featuring axially extending protrusions on the internal vessel that deform to secure to the external vessel by friction, adapting to blowing tolerances and ensuring stable yet removable attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the internal vessel is made by injection molding and the external vessel by blowing, then manufacturing flexibility and material selection are improved, but coupling precision and assembly stability deteriorate due to different tolerances
Solution Approach 1:
The protrusions are designed with specific dimensional parameters that allow them to deform within controlled limits. The deformation capability is engineered to accommodate the tolerance differences between molding and blowing processes, enabling reliable coupling despite the different manufacturing precision levels of the two vessels.
Solution Approach 2:
The protrusions are designed to be deformable rather than rigid, allowing them to dynamically adapt to the external vessel's mouth geometry. This dynamic deformation capability enables the internal vessel to achieve stable coupling with the external vessel despite variations in dimensional tolerance from the different manufacturing processes.
2Adaptability or versatility
If the internal vessel is made removable for refilling and waste sorting, then environmental compatibility and functionality are improved, but coupling stability and sealing reliability deteriorate
Solution Approach 1:
The fixing portion with protrusions is localized at the coupling interface between the internal and external vessels. This localized deformation mechanism provides reliable coupling stability at the critical interface while maintaining the overall removable nature of the internal vessel for refilling and waste sorting purposes.
Solution Approach 2:
The deformable protrusions provide a dynamic coupling mechanism that maintains stable connection during use but allows for controlled removal. The same deformation capability that ensures reliable coupling also enables easy detachment when refilling or sorting waste is required.
3Strength
If the protrusions are made rigid for strong coupling, then connection strength is improved, but adaptability to blowing tolerances and ease of removal deteriorate
Solution Approach 1:
The protrusions are designed with controlled deformability that allows them to flex and adapt to the external vessel's mouth geometry during assembly. This dynamic characteristic enables the protrusions to accommodate blowing tolerances while maintaining sufficient connection strength through friction and mechanical interlocking.
Solution Approach 2:
The mechanical properties of the protrusions are engineered to strike a balance between rigidity and flexibility. The material and geometric parameters are selected to provide adequate connection strength while allowing controlled deformation to adapt to tolerance variations in the external vessel coupling interface.
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
Facilitates easy replacement of the internal vessel for refilling and effective waste sorting while maintaining stability during use, promoting environmental compatibility.
Implementation Method 1
the said protrusions being configured to deform when they come into contact with the mouth (2B) of the external vessel (2), thereby securing the internal vessel (3) to the external vessel (2) by friction
Data Source
Figure 1~3
Figure 4~5
Figure 6~9
AI summary
A container (1) comprising an external vessel (2) made of blown glass or plastic, which delimits a cavity (2A) in which an internal vessel (3) configured to house a fluid substance (6) is positioned, isolating the said fluid substance from the external vessel (2), the internal vessel (3) having a fixing portion (4) by means of which the said internal vessel is secured to the external vessel (2), at least at one of the mouths (2B) thereof; the fixing portion (4) has at least three protrusions (5) extending predominantly axially, the said protrusions being configured to deform upon contact with the mouth (2B) of the external vessel (2) thereby securing the internal vessel (3) to the external vessel by friction, in an easily removable manner. Class: B65D