Aseptic Capping Segmentation for Sterile Zone Reduction
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Solution Overview
Problem
Conventional aseptic bottling lines face challenges due to structural complexity, large sterile zones, and difficulty in maintaining sterility, particularly during capping operations, which require manual interventions that can compromise sterile conditions and increase downtime.
Innovation Solution
A method and apparatus for closing receptacles with a simplified structure and smaller controlled-contamination environment, where closures are applied and pressed onto the mouth within the environment, and screwed onto the neck externally, using a non-aseptic capper and a star conveyor to prevent crushing, reducing the need for extensive sterile zones and steam sterilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional aseptic bottling lines are used with large sterile zones and manual interventions, then product sterility is maintained, but device complexity and downtime increase
Solution Approach 1:
The capping process is divided into two distinct zones: a sterile zone for applying the cap to the bottle mouth, and a non-sterile zone for screwing the cap onto the neck. This segmentation allows manual interventions to occur in the non-sterile zone without compromising product sterility, thereby reducing device complexity while maintaining reliability
Solution Approach 2:
The cap itself acts as an intermediary element that transitions from the sterile zone to the non-sterile zone. The cap is initially applied in the sterile environment to seal the product, then subsequently screwed in the non-sterile environment, serving as a mediator between the two zones and eliminating the need for entirely enclosed sterile chambers
2Reliability
If large sterile zones are used for capping operations, then sterility is maintained, but the volume of sterile areas increases
Solution Approach 1:
Instead of maintaining a large uniform sterile zone, the invention applies local quality by creating a small, focused sterile area only at the bottle mouth where cap application occurs. The rest of the capping process, particularly the screwing operation, takes place in a non-sterile environment, thereby minimizing the volume of sterile areas while maintaining sterility where critical
3Ease of operation
If manual interventions are performed in sterile zones, then operational flexibility is improved, but sterility conditions are compromised
Solution Approach 1:
The capping operation is segmented into two phases: cap application in the sterile zone and cap screwing in the non-sterile zone. This allows manual interventions to be performed during the screwing phase without compromising sterile conditions, as the bottle mouth remains sealed by the cap applied in the sterile environment
Solution Approach 2:
Instead of performing all capping operations in the sterile zone as in conventional systems, the invention inverts the sequence by first applying the cap in the sterile zone and then completing the screwing operation in the non-sterile zone, thereby enabling manual interventions without sterility compromise
4Reliability
If conventional capping methods are used, then closures are secured, but sterilization times increase
Solution Approach 1:
The capping process is segmented such that only the critical cap application phase requires a sterile environment, while the screwing phase occurs in a non-sterile environment. This reduces the duration of sterilization requirements while ensuring closure security is established during the sterile phase and maintained through the screwing phase
Data Source
Figure 1
Figure 2(a)~3
AI summary
A method for closing receptacles (2), comprising steps of: in a controlled-contamination environment (6) having a volume that extends into a restricted zone about the neck (2b) of the receptacles, resting and pressing a closure (10) onto a mouth (2a) of each receptacle (2); screwing the capsule (10) onto the neck (2b) of the corresponding receptacle (2) externally of the controlled contamination environment (6).