Closure Assembly with Dual-Process Neck Insert for Plastic Packaging
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Solution Overview
Problem
Existing packaging closure solutions face challenges such as high complexity and material consumption, lack of dual functionality for fixation and sealing, and difficulties in installation and removal, along with inadequate fluid and security sealing.
Innovation Solution
A closure assembly featuring a neck insert with an annular base flange and a tamper-indicating anchor piece that can be secured by either insert molding or ultrasonic welding, providing a versatile and secure fluid-tight seal with mechanical fixation, and a closure cap with a frangible connection for tamper indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If closure assemblies use traditional fixation methods (mechanical interference fit or single sealing method), then the structure is simpler, but the sealing reliability and fixation strength are insufficient
Solution Approach 1:
The patent merges multiple functions into the base flange structure: it provides both sealing contact surfaces and mechanical anchoring features (protrusions/recesses) simultaneously. The base flange integrates the sealing function and fixation function into a single component, eliminating the need for separate sealing elements and simplifying the overall structure while improving reliability.
Solution Approach 2:
The closure assembly design allows the same structure to work with both insert molding and ultrasonic welding processes. The base flange's dual-function features (sealing + anchoring) make the assembly universally compatible with different manufacturing methods, enhancing reliability without requiring process-specific complexity.
2Reliability
If closure assemblies are designed for secure fixation and sealing, then the sealing reliability improves, but the installation and removal difficulty increases
Solution Approach 1:
The closure assembly is segmented into distinct functional zones: the base flange for fixation/sealing, the pour spout for fluid control, and the cap for closure. This segmentation allows each part to be optimized independently - the base flange provides secure fixation while the cap remains easily removable by consumers, resolving the contradiction between secure installation and ease of operation.
3Reliability
If closure assemblies use complex constructional details for dual functionality, then the sealing and fixation improve, but the material consumption increases
Solution Approach 1:
The base flange merges sealing material and anchoring features into a single integrated structure. Rather than adding separate sealing rings and anchoring elements (which would increase material consumption), the design uses the flange's own geometry to provide both functions, reducing overall material usage while maintaining fixation strength.
4Adaptability or versatility
If closure assemblies lack dual functionality for insert molding and ultrasonic welding, then the device complexity is lower, but the adaptability to different manufacturing processes decreases
Solution Approach 1:
The base flange is designed with universal features that work with both insert molding and ultrasonic welding processes. The protrusions and recesses provide mechanical anchoring for insert molding, while the same geometric features serve as energy guidance structures for ultrasonic welding. This multi-functionality achieves manufacturing adaptability without requiring separate process-specific components.
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
The solution enables easy installation and secure sealing of the closure assembly in packaging containers, offering both fluid-tight and tamper-evident features, with the ability to be installed using either insert molding or ultrasonic welding, enhancing manufacturing efficiency and customer usability.
Implementation Method 1
an ultrasonic energy-directing protrusion spans between adjacent surfaces of the tamper-indicating anchor piece and of the annular base flange, and an annular, ultrasonic energy-directing ridge extends from a lower surface of the annular base flange... the tamper-indicating anchor piece is securable by ultrasonic welding to the annular base flange and the annular base flange is securable by ultrasonic welding to an outer wall surface of the container
Data Source
AI summary
A closure assembly (10) for plastic containers comprises a neck insert (12) and a closure cap or plug (26). The closure assembly is configured to be fixed and sealed to the container either by insert-molding or by ultrasonic welding.