Filter Rod Cutting Blade Cooling for Tobacco Machines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In filter tip attachment machines, the high speed and friction of disc knives cause heat buildup, leading to burning and melting of polymeric filter rods, which compromises the ventilating function of filter tips by causing the material to vitrify upon cooling.
Innovation Solution
A device with cooling means, such as nozzles delivering cooling fluid or recesses on the disc knives, is implemented to dissipate heat generated during the cutting process, ensuring the cutting blades do not overheat and damage the filter material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the disc knife rotates at high speed to increase cutting efficiency, then productivity is improved, but temperature increases causing burning and melting of the filter material
Solution Approach 1:
A cooling fluid (intermediary substance) is introduced between the hot disc knife blade and the filter rod to absorb excess heat. The cooling fluid flows through channels in the disc knife or is sprayed onto the cutting surface, acting as a thermal mediator that prevents direct heat transfer to the filter material while allowing the high-speed cutting operation to continue.
Solution Approach 2:
The physical state or temperature of the cutting environment is changed by introducing cooling fluid. This alters the thermal parameters of the cutting zone, maintaining the blade at an optimal temperature range that allows high-speed rotation without causing thermal damage to the polymeric filter material.
2Productivity
If the disc knife rotates at high speed, then productivity is improved, but the ventilating function of the filter tip is compromised due to material vitrification
Solution Approach 1:
The cooling fluid serves as an intermediary that protects the filter material's structural integrity. By absorbing heat during the cutting process, it prevents the polymeric material from reaching its vitrification temperature, thereby preserving the microstructural properties necessary for ventilation function while enabling high-speed cutting.
Solution Approach 2:
The cooling fluid is applied in advance or during the cutting process to prevent the harmful thermal effect before it can occur. This preliminary anti-action counteracts the heat generation from high-speed rotation, ensuring the filter material does not undergo thermal degradation that would compromise its ventilating function.
3Temperature
If cooling means are added to the device, then temperature control is improved, but device complexity increases
Solution Approach 1:
The disc knife structure is designed to perform multiple functions: cutting the filter rod and simultaneously serving as a conduit for cooling fluid delivery. The cooling channels are integrated into the knife blade itself, or the knife assembly incorporates both cutting and cooling functions, reducing the need for separate cooling components and minimizing overall device complexity.
Solution Approach 2:
The cooling system is merged with the disc knife assembly rather than being a separate independent system. The cooling fluid delivery mechanism is combined with the knife structure, and the cooling function is integrated into the existing cutting mechanism, thereby reducing the number of separate components and simplifying the overall device architecture.
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
The cooling system effectively prevents the cutting blades from burning or melting the filter material, maintaining the ventilating function of the filter tips by keeping the cutting surfaces cool throughout the cutting process.
Implementation Method 1
cooling means, such as nozzles delivering cooling fluid
Implementation Method 2
The disc knife blade transfers part of the heat to the portion of the filter rod cut
Implementation Method 3
recesses on the disc knives
Implementation Method 4
dissipate heat generated during the cutting process
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A device for feeding filter rods (2) in a filter tip attachment machine comprises at least one hold-down and transfer roller (5) whereby the filter rods (2) are held down and transferred along a predetermined path (P), and cutting means (9) which cut the filter rods (2) into filter plugs (10) and which are opposed to the hold-down and transfer roller (5); the hold-down and transfer roller (5) and the cutting means (9) define at least one cutting station (11); the device comprises cooling means (22) for cooling the cutting means (9) and capable of removing the heat generated during the cutting of the filter rods (2).