Sheet Forming Return Mechanism for Residual Fiber Handling
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Solution Overview
Problem
Existing sheet manufacturing apparatuses face challenges in handling accumulated materials when the apparatus is stopped, leading to potential deterioration and inefficiencies in restarting operations.
Innovation Solution
Incorporation of a return mechanism that sends residual accumulating material back to the defibrator when the apparatus is stopped, allowing for efficient handling and utilization of the material during restarts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the apparatus stops during accumulation, then the accumulating material remains in the accumulator, but the material deteriorates and causes handling problems
Solution Approach 1:
The return mechanism is activated in advance when a stop is detected, preventing the deterioration problem before it occurs. By automatically sending residual accumulating material back to the defibrator during the stop period, the system prepares for the next restart without material quality degradation or handling issues.
2Productivity
If residual accumulating material is left in the accumulator during stop, then the apparatus structure is simple, but material deterioration occurs and restart efficiency is reduced
Solution Approach 1:
The system uses its own defibrator and transport infrastructure to handle the residual accumulating material. The return mechanism leverages existing apparatus components (defibrator, transport body) to create a self-contained material circulation system, minimizing the need for external handling equipment while improving restart efficiency.
3Reliability
If the apparatus continues to accumulate material during stop, then no additional handling mechanism is needed, but the accumulated material quality deteriorates
Solution Approach 1:
The control unit continuously monitors the accumulation state and detects when a stop occurs. Based on this feedback, it automatically activates the return mechanism to send residual material back to the defibrator, creating a closed-loop control system that maintains material quality while optimizing accumulation efficiency during operational cycles.
Data Source
AI summary
A sheet manufacturing apparatus includes a defibrator that defibrates a paper piece to form a defibrated material, an accumulator that accumulates the defibrated material on a mesh belt to form an accumulating material, a forming machine that forms the transported accumulating material to produce a strip-shaped sheet, and a return mechanism that sends a residual accumulating material that is the defibrated material being accumulating to the defibrator on condition that the accumulator has stopped or is stopped during accumulation.