Reclosable Medical Fluid Container Neck Forming With Conical Inner Channel
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Solution Overview
Problem
The production of reclosable medical fluid containers is expensive and complex, necessitating a more cost-effective and simplified manufacturing process.
Innovation Solution
A medical fluid container with a container connecting piece forming an inner channel and an outer thread, manufactured via calibrating material insertion and mechanical pressure forming, utilizing a blow pin and die to create a conically tapering longitudinal portion with reduced wall thickness and a tamper-evident bead geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If reclosable medical fluid containers are manufactured using conventional methods, then the containers can be reclosed, but the production is expensive and complex
Solution Approach 1:
The container connecting piece integrates multiple functions into a single component: it provides the closure interface with the outer thread, forms the inner channel for fluid access, and incorporates the tamper-evident bead geometry. This merging of functions into one molded piece eliminates the need for separate components and assembly steps, simplifying manufacturing while maintaining reliable sealing and tamper evidence capabilities
Solution Approach 2:
The container connecting piece serves multiple purposes simultaneously: it acts as the closure mechanism interface, the fluid passage structure, and the tamper evidence indicator. This multi-functionality reduces the overall component count and assembly complexity while ensuring both reliable reclosability and tamper detection
2Loss of substance
If the wall thickness of the container connecting piece is reduced to save material, then material and costs are saved, but the risk of material defects increases
Solution Approach 1:
The container connecting piece features a conically widening inner channel that provides local reinforcement in the critical fluid passage region. This conical geometry concentrates material where structural integrity is most needed while allowing reduced wall thickness in less critical areas, optimizing the balance between material consumption and defect prevention
Solution Approach 2:
The conical widening of the inner channel changes the geometric parameters of the connecting piece to optimize material distribution. By varying the wall thickness profile conically rather than uniformly, the design achieves adequate structural strength with overall reduced material consumption, minimizing defects while saving material
3Manufacturing precision
If multiple tools are used to manufacture the container components, then manufacturing precision can be maintained, but manufacturing and handling costs increase
Solution Approach 1:
The container connecting piece is manufactured as a single integrated component in one molding operation, combining what would traditionally require multiple separate manufacturing steps. The single-tool production of the integrated piece including the outer thread, inner channel, and bead geometry maintains precision while eliminating the costs associated with multiple tools and assembly operations
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
Reduces material and manufacturing costs while minimizing defects, enabling efficient production in a single tool and ensuring reliable indication of container opening.
Implementation Method 1
the container connecting piece is formed exclusively by calibrating material insertion via a blow pin/blow-pin tip preferably having a conically tapering longitudinal portion of the outer circumference, and which presses a container blank in the region of the container connecting piece against/into a die having a longitudinal portion of the outer thread
Implementation Method 2
Pressing additionally compacts the material of the container blank in the relevant region, which minimizes the risk of defects and sink marks
Data Source
AI summary
A medical fluid container includes a container interior and a connecting piece that forms an inner channel. The container interior can be accessed from the outside via the connecting piece. The connecting piece has an outer thread on a connecting piece longitudinal section. The inner channel expands in a substantially conical manner in a region of the outer thread, starting from the container interior, to then preferably transition into a first cylindrical channel shape which extends to a free opening of the connecting piece. A method can be used for producing the medical fluid container from a container blank.