Coating-Free Filter Strand Additive Application After Hardening
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Solution Overview
Problem
Existing methods for introducing additives into coating-free filter strands in the tobacco processing industry contaminate the forming device and are inefficient, particularly when the additive is applied before the filter material is formed.
Innovation Solution
The additive is applied to a hardened filter strand after formation, using a hollow tube with controlled additive and compressed air application to ensure even distribution and minimize contamination, with the additive being applied without mechanical contact and sealed chambers to prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the additive is applied before the filter material is formed into a filter strand, then the additive can be introduced into the filter material, but the forming device becomes contaminated with the additive
Solution Approach 1:
The filter strand is formed and hardened first, then the additive is applied in a subsequent step. This preliminary formation and hardening of the filter strand creates a stable substrate that prevents additive migration to the forming device, eliminating contamination while ensuring proper additive incorporation.
Solution Approach 2:
The additive application step is extracted and separated from the filter strand formation process. By removing the additive application from the forming device operation and performing it separately after hardening, the contamination problem is eliminated while maintaining additive introduction functionality.
2Object-generated harmful factors
If the additive is applied to a coating-free filter strand after hardening, then contamination of the forming device is prevented, but the additive application must be precisely controlled to avoid loss
Solution Approach 1:
Compressed air is used to apply the additive to the filter strand through a hollow tube. The pneumatic application method provides precise control over additive distribution, ensuring even application without overflow or loss, while the contained delivery system prevents contamination.
Solution Approach 2:
The physical state and delivery parameters of the additive are controlled through compressed air pressure and hollow tube geometry. By adjusting these parameters, the additive is delivered in a controlled manner that prevents both contamination and substance loss, achieving precise application efficiency.
3Device complexity
If the filter strand is made dimensionally stable before additive application, then the additive application process is simplified, but the forming and hardening process becomes more complex
Solution Approach 1:
The filter strand is formed and hardened to achieve dimensional stability before the additive application step. This preliminary preparation creates a stable, rigid substrate that simplifies subsequent additive application by preventing deformation or migration, making the overall process more controllable despite the additional hardening step.
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
This method ensures efficient and uniform application of additives to the filter strand while preventing contamination of the forming device, maintaining dimensional stability and minimizing additive loss.
Implementation Method 1
Compressed air is applied to the filter strand downstream of the additive application point in the conveying direction of the filter strand. This agitates the additive within the hollow tube and prevents significant amounts of additive from escaping at the tube's outlet.
Implementation Method 2
The additive application device has, in the conveying direction of the filter strand, firstly in a first area additive passage openings in the hollow tube and in a second area adjoining the first area in the conveying direction, compressed air passage openings in the hollow tube.
Implementation Method 3
the additive, which can also be referred to as a flavoring agent such as menthol oil or another oil, particularly an essential oil, is introduced evenly into the filter
Data Source
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AI summary
The invention relates to a method for applying an additive, in particular a flavor, to a coating-free filter strand (10) for the tobacco processing industry, wherein the filter strand (10) is first formed from at least one filter material in a forming device, wherein the filter strand (10) is then hardened, and wherein the additive is applied after the hardening step. The invention further relates to an additive application device (11) for applying an additive to a filter strand (10) for the tobacco processing industry, comprising a hollow tube (12) into which a filter strand (10) for the tobacco processing industry can be inserted or is inserted during the manufacture of the filter strand, in particular after the forming of the filter strand.