Infrared Processing Module with Cooled Confinement Elements
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Solution Overview
Problem
Conventional electromagnetic processing units for heating hollow plastic bodies, such as parisons, face challenges in maintaining low thermal inertia and security due to high thermal radiation interferences and inefficiencies in temperature regulation.
Innovation Solution
The design incorporates a processing module with a main body, a light emitting assembly of infrared sources, and confinement elements made of opaque materials for thermal regulation, using a fluidic circuit to maintain the confinement elements at a temperature close to atmospheric temperature, minimizing thermal inertia and radiation interferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional tubular incandescent halogen lamps are used for heating parisons, then continuous spectrum radiation is achieved, but heating speed and selectivity are limited
Solution Approach 1:
The patent transitions from broadband halogen lamp radiation to monochromatic or quasi-monochromatic infrared radiation at specific wavelengths (e.g., 1.06 µm, 1.55 µm, or 2.0 µm). This parameter change in radiation characteristics enables selective heating of plastic materials at their absorption peaks, achieving both faster heating rates and improved heating selectivity simultaneously
2Productivity
If the processing unit operates at high temperature, then heating efficiency is improved, but thermal inertia increases and security decreases
Solution Approach 1:
The patent divides the processing unit into distinct thermal zones: a hot zone containing the infrared sources for efficient heating, and a cool zone where confinement elements are actively cooled to near atmospheric temperature. This segmentation allows the system to maintain high heating efficiency in the processing zone while ensuring safety and low thermal inertia in the structural components
Solution Approach 2:
The patent introduces a fluidic circuit as an intermediary cooling system between the infrared sources and the confinement elements. This fluidic intermediary transfers heat away from the confinement elements, enabling them to remain at low temperatures despite proximity to high-power infrared sources, thus maintaining security without compromising heating efficiency
3Productivity
If confinement elements are heated by infrared radiation, then radiation reflection is improved, but thermal fatigue and radiation interferences increase
Solution Approach 1:
The fluidic circuit acts as a thermal intermediary, absorbing excess heat from the confinement elements through active cooling. This prevents thermal fatigue in the confinement elements while maintaining their optical reflection properties, as they operate at optimal temperatures without excessive thermal stress
Solution Approach 2:
The patent replaces passive thermal management (relying on natural convection and radiation) with an active fluidic cooling system. This substitution enables precise temperature control of the confinement elements, maintaining their optical performance while eliminating thermal fatigue issues that would arise from uncontrolled heating
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 configuration enhances the security and efficiency of the processing unit by maintaining low thermal inertia, reducing thermal fatigue, and ensuring quick operational readiness, while maintaining the optical precision and performance of the infrared heating.
Implementation Method 1
said confinement element being mounted onto the main body so as to be in thermal contact therewith
Implementation Method 2
thermal regulation of the confinement face is provided by the fluidic circuit
Implementation Method 3
a light emitting assembly including a plurality of light emitting sources, the light emitting assembly being such mounted onto the main body as to radiate frontwards
Implementation Method 4
The confinement element serves to reflect the infrared light toward the parisons
Data Source
Figure 1
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AI summary
Electromagnetic processing module (8) including: a main body (9) having a front face (10), a light emitting assembly (21) including a plurality of light emitting sources, the light emitting assembly (21) being such mounted onto the main body (9) as to radiate frontwards, a fluidic circuit provided within the main body (9) for thermal regulation of the light emitting assembly (21); at least one confinement element (44, 60, 71) made of a material opaque to the emitting light and having a confinement face (47, 61, 74, 79) exposed to the emitted light, wherein that said confinement element (44, 60, 71) is mounted onto the main body (9) so as to be in thermal contact therewith, whereby thermal regulation of the confinement face (47, 61, 74, 79) is provided by the fluidic circuit (24).