Torque-Controlled Cutting Roller for Tipping Paper Strip Wear Reduction
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Solution Overview
Problem
Existing cutting devices in the tobacco processing industry, particularly in filter attachment machines, face inefficiencies in cutting tipping paper strips due to high wear and limited ability to handle wider material webs, with existing methods relying on non-torque-controlled drives that lead to overstretching of cutting knives and suboptimal cutting contours.
Innovation Solution
A device with a cutting roller and suction roller that utilize torque-controlled and speed-controlled drives, allowing for precise control of contact pressure and overpressure, enabling scissors cuts with reduced wear and the ability to cut wider webs and non-linear contours, featuring a gearbox for independent operation during production and shared operation during non-production modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a non-torque-controlled suction roll drive is used, then the device complexity is reduced, but the cutting knife experiences high overpressure and rapid wear
Solution Approach 1:
The patent applies parameter changes by transitioning from a non-torque-controlled drive to a torque-controlled drive system. The torque-controlled drive dynamically adjusts the drive torque based on the actual cutting conditions, preventing excessive overpressure on the cutting knife while maintaining necessary cutting force. This parameter control enables the cutting knife to operate within optimal stress limits, significantly extending its service life and reducing wear.
2Reliability
If a torque-controlled cutting roller drive is provided, then the cutting knife wear is reduced, but the device complexity increases
Solution Approach 1:
The torque-controlled drive system incorporates feedback mechanisms that continuously monitor cutting conditions and adjust the drive torque accordingly. This feedback control ensures that the cutting knife operates under optimal conditions, preventing excessive wear while maintaining cutting efficiency. The feedback system allows the drive to adapt to varying material properties and cutting parameters, extending knife service life without requiring overly complex mechanical structures.
3Manufacturing precision
If the cutting roller and suction roller are driven by separate torque-controlled drives, then the contact pressure can be precisely controlled, but the device complexity increases
Solution Approach 1:
The patent applies dynamics by implementing separate torque-controlled drives for both the cutting roller and suction roller, allowing dynamic and independent control of each component. This enables precise control of the contact pressure between the cutting knife and groove flank by dynamically adjusting the torque of each drive based on real-time cutting conditions. The dynamic control system can adapt to varying material properties and cutting parameters, achieving high manufacturing precision while managing device complexity through intelligent control algorithms.
4Adaptability or versatility
If existing cutting devices are used, then the structure is simpler, but the ability to handle wider material webs is limited
Solution Approach 1:
The patent applies parameter changes by using torque-controlled drives that can dynamically adjust cutting parameters such as contact pressure, overpressure, and cutting speed. This enables the cutting device to handle wider material webs by optimizing cutting parameters for different web widths and material properties. The torque control allows the system to maintain optimal cutting conditions across varying web dimensions, extending the device's adaptability without requiring a complete redesign of the cutting structure.
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 solution reduces wear on cutting blades, allows for precise cutting of wider material webs, and extends the service life of cutting blades by controlling overpressure, enabling clean cuts and efficient operation with reduced manual intervention.
Implementation Method 1
the suction roller having grooves in the circumferential direction for receiving cutting knives of the cutting roller, with simultaneous counter-rotating rotation of the cutting roller and the suction roller
Data Source
Figure 1
Figure 2
AI summary
The invention relates inter alia to a device (30) for cutting a strip of material web (2) of the tobacco processing industry, in particular a coating paper strip (2), into material web sections (39) with a cutting roller (32) and a suction roller (36) cooperating with the cutting roller (32). In this arrangement, the material web strip (2) is guided between the cutting roller (32) and the suction roller (36), the cutting roller (32) having circumferential cutting blades (34), the suction roller (36) having circumferential grooves (38) for receiving cutting blades (34) of the cutting roller (32), wherein, with simultaneous counter-rotation of the cutting roller (32) and the suction roller (36), the cutting blades (34) of the cutting roller (32) each dip into a groove (38) of the suction roller (36) and can be brought into contact with a groove flank (47) of the groove (38) forming a shear cut, wherein for the rotation of the suction roller (36) only onepreferably a suction roller drive (56) directly driving the suction roller (36) and position-controlled or speed-controlled, and wherein for the rotation of the cutting roller (32) exclusively a cutting roller drive (52) preferably directly driving the cutting roller (32) and torque-controlled is provided.