Rotating Blade Device Sensor Feedback Perforation Control
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Solution Overview
Problem
Existing perforation and cutting devices for continuous web materials, such as tissue paper, face challenges with incorrect blade and counter-blade positioning, wear, and breakage, leading to mechanical stress, vibrations, and low-quality products due to inadequate control and management.
Innovation Solution
A rotating blade device with a mutual contact sensor and angular position sensor is used to detect and adjust the contact between rotating blades and a counter-blade, ensuring precise operation and reducing wear by providing real-time feedback on contact points and pressure distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If blades and counter-blade are adjusted manually to achieve correct perforation, then manufacturing precision is improved, but device complexity and operation time increase due to long and complex adjustment procedures requiring specialist personnel
Solution Approach 1:
The system performs self-diagnosis and self-adjustment through automated sensors and control units that monitor blade contact and automatically regulate blade-holder position, eliminating the need for specialist personnel and complex manual adjustment procedures
Solution Approach 2:
Sensors detect the contact between blades and counter-blade, providing real-time feedback to the control unit which automatically adjusts the blade-holder position to maintain optimal perforation quality without manual intervention
2Manufacturing precision
If blades and counter-blade are adjusted frequently to compensate for wear, then manufacturing precision is maintained, but loss of time increases due to repeated adjustments and replacements
Solution Approach 1:
The control unit continuously monitors blade contact through sensors and automatically compensates for wear by adjusting blade-holder position in real-time, eliminating the need for frequent manual adjustments and reducing downtime
Solution Approach 2:
Manual mechanical adjustment operations are replaced by an automated control system with sensors and actuators that perform real-time blade positioning, reducing the time and expertise required for maintenance
3Manufacturing precision
If blade contact force is increased to ensure proper perforation, then manufacturing precision is improved, but reliability decreases due to increased mechanical stress and risk of breakage
Solution Approach 1:
The system dynamically adjusts blade contact force based on real-time feedback from sensors, maintaining optimal perforation quality while preventing excessive force that could cause blade breakage or mechanical stress
Solution Approach 2:
Sensors monitor the contact between blades and counter-blade, providing feedback to the control unit which automatically regulates blade position to maintain precise contact force within safe limits, ensuring both perforation quality and blade durability
Data Source
AI summary
The device includes a fixed counter-blade and a rotating blade-holder on which a set of rotating blades is arranged. A web material which must be perforated or cut into sheets passes between blade-holder and counter-blade. A mutual contact sensor and an angular position sensor provide signals that allow correct positioning and functioning of the rotating blades and the counter-blade to be displayed on a human-machine interface.