Glue Application Roller with Stripping Part for Tobacco Wrapping
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Solution Overview
Problem
The existing methods for applying glue to wrapping strips in the tobacco processing industry result in uneven glue distribution, leading to excessive glue application in the middle and insufficient adhesion at the edges, causing contamination and reduced adhesive strength, which is costly and difficult to manage.
Innovation Solution
A device with a stripping part positioned between the nozzle and the roller, which shapes the glue into a defined thickness and applies it evenly across the wrapping strip, independent of the nozzle's orientation, allowing for precise control and adjustment of the glue trace.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a nozzle with round opening is used to apply glue continuously, then the glue application quantity can be controlled by gear pump speed, but the glue emerges unevenly across the cross-section with higher exit speed in the center than at the edges
Solution Approach 1:
A cap is introduced as an intermediary component between the nozzle and the wrapping strip. The cap has a cylindrical surface that contacts the glue and the wrapping strip, serving as a mediator to redistribute the glue evenly across the width. This intermediary element transforms the uneven parabolic flow profile from the nozzle into a uniform distribution on the wrapping strip.
Solution Approach 2:
The patent replaces the direct mechanical application system (nozzle pointing directly at the wrapping strip) with a different mechanical approach using the cap's cylindrical surface. Instead of relying on the nozzle's direct spray pattern, the system uses the cap's geometry and rotation to mechanically distribute the glue uniformly, substituting the flow-based mechanism with a geometric distribution mechanism.
2Productivity
If the nozzle outlet opening is circular, then the glue application can be continuous, but the time for wrapping strip to pass edge sections is significantly shorter than for center section resulting in excessive glue in the center
Solution Approach 1:
The cap acts as an intermediary that decouples the circular nozzle geometry from the final glue distribution pattern. It receives the glue from the circular nozzle and transforms it into a uniform distribution, compensating for the time differential between center and edge sections of the wrapping strip.
Solution Approach 2:
The solution moves the glue distribution problem from the temporal dimension (different passage times at different positions) to the spatial dimension by using the cap's cylindrical surface geometry. The cap's rotation and surface area distribute the glue uniformly across the width, transforming a time-based application problem into a space-based solution.
3Device complexity
If glue is applied directly to the wrapping strip, then the process is simple, but glue penetration occurs through the porous wrapping strip reducing adhesive strength
Solution Approach 1:
The cap serves as an intermediary that controls the glue application interface. By contacting the glue and the wrapping strip simultaneously, it regulates the glue transfer, preventing excessive penetration into the porous material while ensuring adequate adhesion. This intermediary layer manages the glue's interaction with the porous wrapping strip.
Solution Approach 2:
The system changes the parameters of glue application by using the cap's cylindrical surface to control glue thickness and distribution. This modifies the glue's physical state during application, creating a controlled layer that prevents penetration while maintaining bonding effectiveness.
4Manufacturing precision
If the stripping part is positioned at a defined distance from the roller, then the glue line thickness is precisely controlled, but the device complexity increases
Solution Approach 1:
The device is segmented into distinct functional components: the nozzle for glue application, the cap for distribution, the stripping part for thickness control, and the roller for application. This segmentation allows each component to be optimized independently, with the stripping part's position precisely controlled relative to the roller to achieve the desired glue line thickness.
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 solution achieves a uniform glue seam with high adhesive strength, reduces contamination, and allows for easy replacement or adjustment of the stripping part to accommodate different glue geometries, ensuring consistent quality and efficiency even at high production speeds.
Implementation Method 1
a stripping part (7) which is directed towards the roller (4) and has a defined distance from the roller (4), wherein the stripping part (7) shapes the glue (5) into a glue line (6) with a defined thickness
Implementation Method 2
a roller (4) which is driven in rotation about a rotation axis (11) in the direction of arrow A, wherein the glue line (6) is applied to the wrapping strip (1) by the roller (4)
Data Source
Figure 1
Figure 2~5
Figure 6~8
AI summary
The invention relates to a device for applying a bead of glue (6) to a moving wrapping strip (1) of a rod-shaped product of the tobacco processing industry, with a nozzle (2) that is stationary relative to the wrapping strip (1) during the application of the bead of glue (6), wherein a roller (4) which can be rotated via a drive device is provided between the wrapping strip (1) and the outlet opening (3) of the nozzle (2), onto which the glue is applied, and which applies the glue in the form of the bead of glue (6) directly onto the wrapping strip (1), wherein in the direction of rotation of the roller (4) a scraper (7) directed towards the roller (4) is provided between the nozzle (2) and the wrapping strip (1), which has a distance to the roller (4).