Additive Dispensing Inside Rod Shaping for Uniform Sheet Coverage
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Solution Overview
Problem
Existing methods struggle to efficiently distribute additives, such as flavorants and aerosol-generating substances, within fragile sheet materials used to form rods, often resulting in waste and uneven distribution.
Innovation Solution
The additive is dispensed within a converging device while the sheet material is being shaped into a rod, ensuring high application efficiency and controlled distribution by using a pipe with a varying wall thickness and a friction-reducing coating to minimize damage and maximize coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the additive is applied onto the sheet material before shaping into a rod, then the application process is simple, but the distribution of additive is uneven and waste occurs
Solution Approach 1:
The additive is applied to the sheet material in advance before the shaping process begins. The sheet material with applied additive then passes through the shaping device where it is formed into a rod, allowing the additive to be distributed during the shaping process itself rather than requiring a separate application step after rod formation
Solution Approach 2:
The additive application process is merged with the shaping process. The converging device performs both functions: it shapes the sheet material into a rod while simultaneously distributing the additive uniformly throughout the material. This combines two operations into one integrated process step
2Ease of operation
If the additive is sprayed onto the sheet material upstream of the converging device, then only one side is covered, but additive waste occurs due to missing the sheet material
Solution Approach 1:
Instead of spraying additive onto the surface of the moving sheet material from above (one-dimensional surface application), the additive is introduced into the converging device where it becomes embedded within the material matrix during the shaping process. This transforms the application from a surface-level operation to a volumetric distribution throughout the rod cross-section
Solution Approach 2:
The converging device acts as an intermediary mechanism that receives the additive and facilitates its controlled distribution within the sheet material during shaping. Rather than direct spray application to the material surface, the additive is introduced through the converging device which mediates its release and distribution, ensuring precise placement and minimizing waste
3Quantity of substance
If the additive concentration is high in radially outer regions after conventional application, then surface coverage is good, but inner regions have low concentration
Solution Approach 1:
The converging device creates different conditions in different regions of the sheet material during shaping. The mechanical action and pressure distribution within the converging device ensure that additive is distributed differently across the radial cross-section, achieving appropriate concentration gradients or uniformity as required by the specific application needs
4Reliability
If the sheet material is fragile, then handling is difficult, but additive application within the converging device may cause damage
Solution Approach 1:
The additive is applied to the sheet material before it enters the high-stress shaping zone of the converging device. By having the additive already on or in the material beforehand, the subsequent shaping process distributes it without requiring additional handling or exposure of fragile material to harsh conditions during additive application
Solution Approach 2:
The converging device serves as a protective intermediary that controls the interaction between the additive and the fragile sheet material. It provides a controlled environment for additive introduction and distribution, shielding the fragile material from direct exposure to harsh application methods while still achieving effective additive incorporation
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 achieves uniform distribution of additives across the sheet material, reducing waste and ensuring high concentration in the inner regions of the rod, while minimizing material damage and improving the overall production process.
Implementation Method 1
a friction-reducing coating to minimize damage and maximize coverage
Data Source
Figure 1~2
Figure 3~4
AI summary
A method for producing a rod containing herbaceous material comprises the steps of: providing a sheet material containing herbaceous material; shaping the sheet material into a rod-shape by conveying the sheet material along a conveying direction through a funnel-shaped converging device; and dispensing an additive onto the sheet material within the converging device.