Filter Tow Strip Stretching Control During Production Stops
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Solution Overview
Problem
During production stops in the tobacco processing industry, filter tow strips come into contact with triacetin deposits, leading to rapid dissolution and potential tearing when production resumes, causing disruptions and requiring manual handling.
Innovation Solution
Terminating the stretching of filter material strips during production stops and bundling them within the application path to slow down the dissolving process, allowing for automatic restarts without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the filter tow strip is continuously stretched during production, then the production efficiency is improved, but the strip dissolves rapidly and tears when coming into contact with triacetin deposits during production stops
Solution Approach 1:
The patent applies dynamics by making the stretching process controllable and adjustable based on production state. The stretching is activated during production and deactivated during stops, allowing the system to adapt its behavior to different operational phases. This dynamic control prevents the strip from being in a vulnerable stretched state during stops when triacetin exposure occurs.
Solution Approach 2:
The patent implements preliminary anti-action by deactivating the stretching process before or during production stops, anticipating the harmful effect of triacetin exposure on stretched strips. This preemptive measure prevents the strip from entering a vulnerable state that would lead to rapid dissolution and tearing when triacetin deposits are encountered.
2Reliability
If the stretching process is terminated during production stops, then the strip dissolving rate is reduced, but the production process is interrupted
Solution Approach 1:
The patent applies periodic action by cyclically activating and deactivating the stretching process based on production requirements. During normal production, stretching is active to maintain efficiency; during stops, it is deactivated to protect the strip from triacetin-induced dissolution. This periodic modulation of the stretching process resolves the contradiction between maintaining production continuity and protecting strip integrity during stops.
3Reliability
If manual handling is required to remove strips from spray chambers during stops, then the risk of strip damage is reduced, but the operational complexity and time increase
Solution Approach 1:
The patent implements self-service by enabling the system to automatically protect itself from strip damage during stops through automated control of the stretching process. The system monitors production state and automatically deactivates stretching during stops, eliminating the need for manual intervention to remove strips from spray chambers. This self-protective mechanism reduces both operational complexity and time while maintaining strip integrity.
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
Extends the service life of filter material strips and enables seamless automatic start-ups by minimizing triacetin absorption, reducing the risk of defects and manual handling during maintenance.
Implementation Method 1
the stopped tow strip comes into contact with triacetin in the area of the application section due to the deposits in the spray chamber
Data Source
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AI summary
The method involves conveying filter tow strips (2) along a conveying path, and applying a liquid additive e.g. triacetin, on the strips by using an application device (47). The stretching of the strips is terminated during or after the initiation of a production stop of the application of the additive based on the condition of a filter storage. The strips are bundled at a point in an inner side of an application track (7) during or after initiation of the stop.