Tubular Wrapper Filling and End Closure for Material Retention
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Solution Overview
Problem
Existing machines for filling tubular wrappers in the tobacco industry fail to ensure the integrity of the filling material during and after the production process, leading to the loss and deterioration of the product.
Innovation Solution
A filling unit with a filling station and a closing station that inserts and secures the filling material within tubular wrappers using closing means to form transverse walls, ensuring the material remains contained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prior art machines are used to fill tubular wrappers, then filling operation is performed, but the filling material cannot be ensured to remain inside the tubular body
Solution Approach 1:
The closing station divides the closing operation into multiple sequential actions: folding the tubular wrapper end inward to form a closed end, then applying closing elements to seal the filling material. This segmentation ensures reliable retention while maintaining manageable device complexity through modular functional breakdown.
Solution Approach 2:
The folding mechanism performs a preliminary closing action by folding the tubular wrapper end inward before the final sealing operation. This preliminary action creates a pre-closed structure that prevents filling material loss during subsequent handling, addressing the reliability issue before final sealing occurs.
2Loss of substance
If filling material is inserted into tubular wrappers, then filling is achieved, but material loss and product damage occur during production
Solution Approach 1:
The closing station applies closing elements and sealing actions beforehand to prevent filling material loss before it can occur during subsequent production processes. This proactive protection eliminates the need for defective product removal, maintaining both material retention and production efficiency without trade-offs.
3Reliability
If closing walls are formed transverse to the main axis, then filling material containment is improved, but device complexity increases
Solution Approach 1:
The folding mechanism utilizes the tubular wrapper's own material to create the closing wall by folding the end inward. This self-service approach forms the containment structure using the product itself rather than requiring separate complex closing components, reducing device complexity while achieving reliable material containment.
Data Source
Figure 1~2
Figure 3
Figure 4A~4C
AI summary
This invention relates to a filling unit, configured to fill a succession of tubular wrappers (T) of the tobacco industry. The tubular wrappers (T) extend along a main axis of extension (X) and internally define respective containment 5 chambers adapted to contain a filling material of the tobacco industry and have an access opening on at least one of its ends for access to the containment chamber. The unit also comprises a filling station (11) configured to insert the filling material into respective containment chambers of the succession of tubular 10 wrappers (T) through a filling end of them and a closing station (13) disposed downstream of the filling station (11) and comprising a plurality of closing means (14) configured to make respective walls which close the filling ends and which are transverse to the respective main axes of extension (X).