Thermal Pressure Roller Control for Stable Two-Ply Sheet Lamination
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Solution Overview
Problem
Existing sheet laminators face inefficiencies in processing two-ply sheets due to temperature deviations in thermal pressure rollers, leading to power cutoffs and separation issues, which disrupt the sheet lamination process.
Innovation Solution
A sheet laminator with a thermal pressure roller pair, power cutoff device, mover, and circuitry that adjusts power and movement of rollers based on temperature changes, ensuring consistent sheet lamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thermal pressure roller pair maintains continuous heating to ensure stable lamination temperature, then the lamination quality is improved, but energy consumption increases and temperature deviations occur
Solution Approach 1:
The heating elements operate periodically rather than continuously. The controller activates heating when temperature drops below a threshold and deactivates when the target temperature is reached, creating a periodic heating cycle that maintains temperature stability while reducing overall energy consumption.
Solution Approach 2:
Temperature sensors continuously monitor the roller temperature and feed this information back to the controller. The controller adjusts heating power based on the feedback signal, increasing power when temperature drops and reducing or cutting off power when the target temperature is achieved, thereby optimizing energy usage while maintaining reliability.
2Object-affected harmful factors
If the external heating roller is separated from the fixing roller when temperature is out of range to prevent damage, then the harmful effect is reduced, but the sheet lamination process is disrupted
Solution Approach 1:
The system performs preliminary heating action by activating the external heating roller before the sheet lamination process begins. This ensures the fixing roller reaches the target temperature in advance, preventing temperature deviation damage during the actual lamination process while maintaining continuous productivity.
Solution Approach 2:
The controller monitors temperature in advance and activates heating elements before temperature deviations occur. This preemptive action cushions against potential temperature deviations that would otherwise cause sheet separation or lamination failures, maintaining both safety and productivity.
3Loss of energy
If the power to heaters is cut off when temperature reaches target range to save energy, then energy efficiency is improved, but temperature control precision may be affected
Solution Approach 1:
Instead of completely cutting off power, the system uses periodic or pulsed heating to maintain temperature. Small heating pulses are applied periodically to compensate for heat loss, maintaining precise temperature control while minimizing energy consumption compared to continuous heating.
Solution Approach 2:
The feedback control system continuously monitors temperature and applies minimal heating power only when needed to maintain the target temperature range. This precise feedback control achieves both energy efficiency and temperature precision by avoiding both over-heating and complete power cutoff.
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
Enhances productivity by efficiently inserting and laminating inner sheets between two-ply sheets, reducing processing time and improving overall sheet handling efficiency.
Implementation Method 1
a first heater to heat the first roller
Implementation Method 2
a second heater to heat the second roller
Implementation Method 3
The power cutoff device detects a change in temperature of at least one of the first roller or the second roller
Implementation Method 4
the thermal pressure roller pair performs the sheet lamination on the lamination sheet by applying heat and pressure to the lamination sheet
Data Source
AI summary
A sheet laminator including a thermal pressure roller, a power cutoff device, a mover, a power line, and circuitry. The thermal pressure roller pair includes first and second rollers, and first and second heaters, to form a nip region to press and convey a two-ply sheet. The power cutoff device detects a change in temperature of at least one of the first or second roller, and cuts off a power to at least one of the first or second heater. The mover relatively moves the second roller away from the first roller. The power line couples the power cutoff device to the mover. The circuitry is to cause the power cutoff device to cut off the power line, and cause the mover to relatively move the second roller away from the first roller, in response to the power cutoff to at least one of the first or second heater.