Embossing Roller Induction Heating for Fast Surface Temperature Control
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Solution Overview
Problem
Existing heating systems for embossing rollers in tissue paper production are energy-intensive, inefficient, and pose safety risks to operators due to the use of recirculating fluids, requiring improved heating techniques that are more efficient, rapid, and safer.
Innovation Solution
An embossing-laminating device utilizing electromagnetic induction to heat the outer surface of embossing rollers, with eddy currents generated to rapidly heat and maintain the working surface of the rollers, and a closed-loop control system to regulate temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If recirculating fluid systems are used to heat embossing rollers, then the rollers can be heated, but the systems are energy-intensive and inefficient
Solution Approach 1:
The patent replaces the mechanical recirculating fluid heating system with an electromagnetic induction heating system. The induction heating device generates electromagnetic fields that directly induce eddy currents in the embossing roller, converting electrical energy directly into heat within the roller itself, eliminating the need for fluid circulation systems and significantly improving energy efficiency
Solution Approach 2:
The embossing roller heats itself through electromagnetic induction. The roller's own electrical conductivity allows it to generate heat internally when exposed to the electromagnetic field, eliminating the need for external heat transfer media and making the heating process self-sufficient and highly efficient
2Temperature
If recirculating fluid systems are used to heat embossing rollers, then the rollers can be heated, but the heating time is long
Solution Approach 1:
The patent replaces the slow thermal conduction process of recirculating fluids with rapid electromagnetic induction heating. The electromagnetic fields directly induce currents in the roller, generating heat instantly throughout the roller material, reducing heating time from potentially hours to minutes or seconds
Solution Approach 2:
The electromagnetic induction heating system prepares the roller for operation by rapidly bringing it to the required temperature before the embossing process begins. This preliminary heating action ensures the roller is ready immediately when needed, eliminating long warm-up periods
3Temperature
If recirculating fluid systems are used to heat embossing rollers, then the rollers can be heated, but the systems pose safety risks to operators
Solution Approach 1:
The patent replaces the hazardous recirculating fluid system with electromagnetic induction heating. The induction heating device contains the electromagnetic field within a controlled area, and the roller heats itself without requiring external heat transfer fluids, eliminating leak risks and operator exposure to hot pipes and pressurized systems
Solution Approach 2:
The electromagnetic field acts as an intermediary between the power source and the roller, transferring energy wirelessly and contactlessly. This eliminates the need for physical connections involving hot fluids or high-temperature components that operators might accidentally contact, significantly improving safety
4Temperature
If recirculating fluid systems are used to heat embossing rollers, then the rollers can be heated, but the systems are costly
Solution Approach 1:
The patent replaces the costly recirculating fluid system with electromagnetic induction heating. The induction system eliminates expenses related to fluid circulation pumps, heat exchangers, fluid replacement, and maintenance of complex piping systems, reducing both capital and operating costs
Solution Approach 2:
The patent converts the electrical conductivity of the metal roller, which would normally be a challenge for heating, into an advantage. The same conductivity that makes metal rollers suitable for embossing also enables efficient electromagnetic induction heating, turning a potential problem into a beneficial feature that reduces energy costs
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
The solution provides efficient, rapid heating and cooling of embossing rollers, reducing energy waste, downtime, and ensuring operator safety while maintaining consistent product quality.
Implementation Method 1
an operating frequency of said electromagnetic induction currents is such as to generate eddy currents on said first embossing roller such as to prevalently follow the profile of the outer surface of said first embossing roller
Implementation Method 2
generate eddy currents on said first embossing roller such as to prevalently follow the profile of the outer surface of said first embossing roller
Implementation Method 3
eddy currents on said first embossing roller such as to prevalently follow the profile of the outer surface of said first embossing roller
Data Source
AI summary
An embossing device and a method for embossing, employing an electromagnetic induction device such as to induce an eddy current prevalently on the outer surface of an embossing roller. The eddy currents are such as to prevalently heat the outer surface of the embossing roller.