Induction Pin Oven for Metallic Container Coating Cure
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Solution Overview
Problem
Existing metallic container manufacturing facilities face challenges with high energy consumption, and the use of fossil fuels to generate hot air to heat the container bodies, which reduces the amount of CO2 emissions, that do not expose the container bodies to excessive heat when the production line stops, which require less floor space than a prior art oven, and which require less floor space than a prior art oven, and which subject the pin chain to frequent thermal cycling.
Innovation Solution
A pin oven that uses electric induction elements that can quickly heat a metallic container soon after being turned on. In contrast, a prior art oven that uses hot air to heat container bodies, which reduces the amount of CO2 emissions, that do not expose the container bodies to excessive heat when the production line stops, which require less floor space than a prior art oven, and which do not subject the pin chain to frequent thermal cycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If fossil fuels are used to generate hot air to heat container bodies, then heating capability is achieved, but CO2 emissions increase
Solution Approach 1:
The patent replaces the conventional fossil fuel-based thermal heating system with an induction heating system. The induction element generates an electromagnetic field that directly induces eddy currents in the metallic container body, producing heat internally without requiring external hot air generation from fossil fuels, thus eliminating CO2 emissions while maintaining heating capability.
Solution Approach 2:
The patent changes the heating mechanism from convective hot air heating to electromagnetic induction heating. By changing the physical parameter of heat generation from thermal convection to electromagnetic induction, the system achieves the same temperature increase in container bodies without the harmful CO2 emissions associated with fossil fuel combustion.
2Temperature
If hot air is used to heat container bodies, then heating is achieved, but excessive heat exposure occurs when production line stops
Solution Approach 1:
The induction heating system allows for precise control and immediate shutdown of heating. When the production line stops, the induction element can be quickly deactivated, and the electromagnetic field ceases immediately, preventing excessive heat exposure. This is in contrast to hot air systems that continue circulating heat even when production stops.
Solution Approach 2:
The induction heating system operates in a controlled periodic manner, activating only when needed and allowing rapid shutdown. The electromagnetic field is generated only during the heating cycle and can be immediately terminated, creating a periodic action that prevents continuous excessive heat exposure during production line stoppages.
3Temperature
If conventional oven design is used, then heating function is provided, but floor space requirement increases
Solution Approach 1:
The induction heating system eliminates the need for large enclosed oven chambers and extensive ventilation systems required by conventional hot air ovens. The compact induction element can be integrated into a smaller footprint, reducing the overall floor space requirement while providing the same heating function through direct electromagnetic induction.
Solution Approach 2:
The patent extracts the essential heating function from the bulky conventional oven structure. By removing the need for large heated air chambers, insulation layers, and ventilation systems, the design retains the core heating capability in a compact form factor, significantly reducing floor space requirements.
4Temperature
If conventional hot air oven is used, then heating is achieved, but pin chain is subjected to frequent thermal cycling
Solution Approach 1:
The induction heating system generates heat directly in the container body through electromagnetic induction, keeping the surrounding environment and pin chain at ambient temperatures. This eliminates the thermal cycling that occurs in conventional hot air ovens where the pin chain is repeatedly heated and cooled, thereby improving reliability and durability.
Solution Approach 2:
The induction heating system uses electromagnetic fields as an intermediary to transfer energy directly to the metallic container body, bypassing the need for hot air as a medium. This eliminates the thermal environment that would otherwise be imposed on the pin chain, protecting it from thermal cycling damage while still achieving effective heating of the container bodies.
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 electric induction oven efficiently heats metallic containers without using fossil fuels, reducing CO2 emissions, minimizing damage during production line stops, and requiring less floor space, while avoiding frequent thermal cycling of the pin chain.
Implementation Method 1
an induction element operable to heat the metallic workpiece
Implementation Method 2
The inductors are positioned within an enclosed area defined by the tunnel and the outer surface of the heater housing
Data Source
AI summary
Apparatus and methods of heating metallic containers in an oven which includes electric heater housings are provided. The electric heater housings include an electric induction element. The electric heater housings heat the metallic containers to a predetermined temperature to dry moisture on the metallic containers or to cure inks and coatings. Air within the oven may be at a temperature that is less than the predetermined temperature.