Heating Portion Temperature Control for Sheet Manufacturing Startup
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Solution Overview
Problem
Sheet manufacturing apparatuses face challenges in reducing the time it takes to start production from a stopped state while minimizing energy efficiency losses, as maintaining a heating portion at an optimal temperature consumes significant energy even when not in use.
Innovation Solution
A control method that sets the heating portion's temperature to a lower second temperature when not in use, allowing for rapid escalation to the first temperature when production resumes, thereby reducing startup time without significant energy inefficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the heating portion is maintained at the first temperature (appropriate temperature) even when a sheet is not manufactured, then the startup time is reduced, but energy consumption increases significantly
Solution Approach 1:
The heating portion's temperature is dynamically adjusted based on operational state. The control portion switches between first temperature (during manufacturing) and second temperature (lower, during standby), making the system adaptive rather than static. This resolves the contradiction by allowing rapid startup from a warm standby state rather than from complete shutdown, while avoiding continuous high-temperature operation.
Solution Approach 2:
The temperature parameter of the heating portion is changed between two distinct states: first temperature for manufacturing and second temperature (lower) for standby. This parameter switching enables the system to balance between startup speed and energy consumption by maintaining a moderate temperature during idle periods rather than either complete shutdown or continuous full-temperature operation.
2Loss of energy
If the heating portion is completely stopped when not in use, then energy efficiency is improved, but the time to reach operational temperature increases
Solution Approach 1:
The heating portion is preliminarily maintained at a second temperature (lower than operational temperature) during standby periods. This preliminary warming action ensures that when manufacturing resumes, the heating portion is already close to the required first temperature, significantly reducing the time needed to reach operational temperature while avoiding the energy waste of maintaining full operational temperature continuously.
3Productivity
If the heating portion is maintained at the first temperature continuously, then the manufacturing process can start immediately, but energy efficiency decreases
Solution Approach 1:
The heating portion operates in periodic cycles, switching between first temperature during manufacturing operations and second temperature during standby periods. This periodic temperature adjustment allows the system to maintain manufacturing readiness when needed while reducing energy consumption during idle periods, resolving the contradiction between continuous productivity and energy efficiency.
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
This approach enables quicker startup times for sheet manufacturing while maintaining energy efficiency by maintaining a lower standby temperature and efficiently raising it to operational levels when needed.
Implementation Method 1
a heating portion that heats the material
Data Source
AI summary
A sheet manufacturing apparatus is an apparatus that heats a material containing fibers to form a sheet, and includes a heating portion that heats the material, and a control portion that controls a temperature at which the heating portion heats the material. The control portion sets a temperature of the heating portion to a first temperature in a first state where the sheet manufacturing apparatus manufactures the sheet, and sets the temperature of the heating portion to a second temperature lower than the first temperature at a predetermined timing in a second state where the sheet is not manufactured, or at a predetermined timing when a state of the sheet manufacturing apparatus is shifted to the state where the sheet is not manufactured.