Recycled Sheet Feed Control Using Measured Paper Piece Flow
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Solution Overview
Problem
Existing paper processing systems face issues with paper material deviating from target values during the production of recycled paper, particularly in the wet method, where shredded paper materials are not accurately controlled in quantity and quality.
Innovation Solution
A sheet production apparatus and method that includes a tank, motor-driven blade, tube, transport path, production mechanism, and measuring instrument to correct operations based on moving average values, ensuring precise control of paper piece amounts to align with target values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a used paper processing apparatus is used to disperse and weigh shredded paper materials, then the paper can be fed into a pulper tank for recycled paper production, but the paper material as coarse crushed pieces deviates from target value
Solution Approach 1:
The patent implements a feedback control system where a measuring instrument measures the amount of paper pieces, and the processor corrects the operation of the tube based on this measurement to reduce the difference between the measured amount and target value. This closed-loop feedback mechanism directly addresses the deviation problem by continuously monitoring and adjusting the paper piece delivery.
Solution Approach 2:
The system changes operational parameters dynamically by correcting the tube operation based on measured values and using moving average correction for the motor operation. This allows the system to adapt to variations in paper material flow and maintain precise control over the amount of paper pieces delivered to the production mechanism.
2Productivity
If the tube takes in paper pieces transported by blade rotation, then paper pieces can be delivered to the production mechanism, but the amount of paper pieces cannot be precisely controlled
Solution Approach 1:
The measuring instrument measures the actual amount of paper pieces from the tube, and this measurement feeds back to the processor which corrects the tube operation. This feedback loop enables precise control of paper piece amount while maintaining continuous delivery to the production mechanism.
Solution Approach 2:
The system performs preliminary measurement of paper piece amount before production, and uses this information to correct subsequent operations. The moving average correction of motor operation based on previous measurements ensures that precision is maintained over time while productivity continues.
3Speed
If the motor rotates the blade to transport paper pieces outward, then paper pieces can be moved from the tank, but the amount of paper pieces transported cannot be accurately controlled
Solution Approach 1:
The processor corrects the motor operation based on moving average values of measured paper piece amounts. This dynamic parameter adjustment allows the blade rotation speed to be optimized for both productivity and precision, changing operational parameters to maintain accurate control over paper piece transport.
Solution Approach 2:
The system uses feedback from measuring instruments to continuously adjust motor operation. The measured amount of paper pieces feeds back to correct motor operation, creating a closed-loop control system that maintains precision in paper piece transport while preserving blade rotation functionality.
Data Source
AI summary
A sheet production apparatus includes a tank configured to store paper pieces, a motor, a blade provided in the tank and rotated by a force of the motor, a tube configured to take in the paper pieces transported outward by the rotation of the blade, a transport path configured to transport the paper pieces from the tube, a production mechanism configured to defibrate the transported paper pieces and produce a sheet, a measuring instrument configured to measure an amount of paper pieces from the tube, and a processor configured to correct a next operation of the tube based on the amount of paper pieces and correct an operation of the motor based on a moving average value of the amount of paper pieces.