Infrared Can Curing Oven Noise Reduction
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Solution Overview
Problem
Pin ovens used for drying coatings on beverage cans are inefficient due to large size, complex mechanical assemblies, energy wastage, high noise levels, and limited drying speed, making them a bottleneck in can processing lines.
Innovation Solution
A can curing oven with a housing assembly, transfer assembly, and infrared heating units that utilize a transfer belt and modular radiant heating units to efficiently cure coatings on cans, reducing energy consumption and noise while allowing for faster processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If natural gas heaters and exhaust fans are used to heat air in pin ovens, then the coating can be cured, but the noise level increases to about 95 dB and energy consumption increases
Solution Approach 1:
The patent replaces the mechanical convection system (fans and heated air circulation) with infrared radiation heating. The infrared heaters emit radiant energy that directly heats the coating and can body without requiring forced air circulation, thereby eliminating the exhaust fans and significantly reducing noise levels while maintaining effective curing temperatures
2Ease of operation
If heated air is continuously directed against can bottoms to maintain cans on pins, then the cans are stabilized, but energy is wasted because the can bottoms do not have coating applied
Solution Approach 1:
The patent applies local quality by directing infrared heating specifically at the coated surfaces of the can bodies rather than heating the entire can including the uncoated bottoms. The infrared radiation is focused on the lateral surfaces where the coating is applied, providing localized heating that cures the coating without wasting energy on the uncoated can bottoms
3Temperature
If pin ovens are operated continuously to prevent cooling down during interruptions, then the oven temperature is maintained, but energy is wasted when no cans are being processed
Solution Approach 1:
The patent enables periodic action by allowing the infrared heaters to be turned on and off based on actual can processing needs. Unlike continuous convection heating that requires constant operation to maintain temperature, infrared radiation can be rapidly activated and deactivated, enabling the system to heat only when cans are present and reducing energy waste during idle periods
4Length of moving object
If a serpentine conveyor path is used in pin ovens, then the cans can be carried through sufficient length, but the mechanical assembly becomes complex and expensive
Solution Approach 1:
The patent replaces the complex mechanical serpentine conveyor system with a simpler linear or minimal-curvature transfer mechanism. By using infrared radiation heating that does not require long exposure paths, the system can achieve effective curing with much shorter transfer distances, eliminating the need for complex serpentine routing and reducing mechanical assembly complexity
5Productivity
If pin ovens are designed to process about 2400 cans per minute, then the coating can be cured, but the drying speed is limited and creates a bottleneck in the processing line
Solution Approach 1:
The patent changes the fundamental heating parameter from convective heating (requiring extended exposure time) to infrared radiation heating (providing rapid energy transfer). This parameter change enables significantly faster curing speeds, allowing the system to process cans at speeds exceeding 2400 cans per minute and eliminating the bottleneck in the processing line
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 results in a more compact, energy-efficient, and quieter can curing oven that can process cans at higher speeds, overcoming the limitations of traditional pin ovens by optimizing heat transfer and reducing operational costs.
Implementation Method 1
The number of heating units are infrared heating units structured to generate an effective amount of received heat
Data Source
AI summary
A can curing oven including a housing assembly, a transfer assembly, and a number of heating units. The housing assembly defines a generally enclosed space. The transfer assembly is structured to support and move a number of can bodies. The transfer assembly includes an elongated transfer belt. The transfer belt is movably coupled to the housing assembly and is structured to move through the housing assembly enclosed space. The number of heating units are structured to generate an effective amount of received heat.