Blow-fill-seal Container Head Section Guide Path
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Solution Overview
Problem
Existing blow-fill-seal containers with actuation elements for releasing the head section from the neck section do not ensure a uniform load distribution during the tearing process, particularly for larger diameter access openings, leading to unreliable opening mechanisms.
Innovation Solution
A container design where a sleeve section is guided along a coaxial guide path on the head section, allowing for a more uniform load application during the release, with a male thread on the neck section and a female thread on the sleeve section for screwing, and flexible contact fingers for secure engagement, ensuring reliable tearing and resealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a sleeve section is used as an actuation element to release the separating region, then the user can conveniently actuate the opening mechanism, but the load distribution during tearing becomes non-uniform, especially for larger diameter access openings
Solution Approach 1:
A guide path is introduced as an intermediary element between the sleeve section and the separating region. The guide path, formed by the outer cylinder surface of the ring collar, mediates the force transmission from the sleeve to the separating region, ensuring uniform radial distribution of the tearing load across the entire circumference of the access opening, even for large diameter openings.
Solution Approach 2:
The guide path creates a condition where the separating region experiences uniform stress distribution around the entire circumference during actuation. By guiding the sleeve section along a coaxial outer cylinder surface, the system achieves equipotential stress distribution, ensuring simultaneous and uniform tearing at all points around the access opening.
2Productivity
If the access opening diameter is increased to improve dispensing capability, then the dispensing performance is enhanced, but the separating region becomes wider and harder to tear uniformly
Solution Approach 1:
The problem of tearing a wide separating region is solved by transitioning from direct axial force application to radial force distribution through the guide path. The outer cylinder surface of the ring collar distributes the tearing force radially across the entire circumference, converting a one-dimensional tearing problem into a two-dimensional uniform stress distribution problem.
3Strength
If the sleeve section is designed to surround the neck section and head section, then the structure provides good engagement, but the alignment during actuation may be imprecise without a guide path
Solution Approach 1:
The guide path formed by the outer cylinder surface of the ring collar serves as a precision intermediary that guides the sleeve section during actuation. This guide path ensures precise coaxial alignment between the sleeve and the head section throughout the tearing process, maintaining manufacturing precision even with large tolerance ranges in the separating region.
Data Source
AI summary
A container of a plastic material is produced using a blow-fill-seal method, and has a container body (1) for receiving a fluid as well as a neck section (5) connected to the container body (1). At the container free end, a dispensing opening (13) for fluid is sealed via a separating region (15, 19) with a head section (17) that can be removed from the neck section (5) by actuating a movable sleeve section (35). By releasing the separating region (15, 19), the dispensing opening (13) is exposed. From the unactuated state to the actuated state in which the separating region (15, 19) is released, the sleeve section (35) is guided so as to be at least partially in contact with a guide path (23) that is part of the removable head section (17).