UVLED Array Curing Glass Fiber Coatings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mercury lamps used for UV curing of glass fiber coatings are inefficient, consuming significant power, generating excessive heat, and wasting energy due to their wide electromagnetic radiation spectrum, with much of the UV radiation not reaching the small glass fibers.
Innovation Solution
Employing UVLED arrays with overdriven UVLED sources that emit UV radiation with adjustable intensity and phase to ensure consistent curing of glass fiber coatings at commercial draw speeds, reducing energy consumption and heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If mercury lamps are used to generate UV radiation for curing, then sufficient UV intensity is achieved, but power consumption increases significantly
Solution Approach 1:
The patent replaces conventional mercury arc lamps with UV LED arrays to generate UV radiation for curing coatings. UV LEDs consume significantly less power while providing sufficient UV intensity for effective curing, directly resolving the contradiction between achieving adequate UV illumination and minimizing power consumption
Solution Approach 2:
The patent adjusts the electrical current parameters of UV LED sources to optimize UV output intensity. By controlling the current through each UV LED, the system achieves the required UV radiation levels for curing while maintaining lower power consumption compared to mercury lamps
2Illumination intensity
If mercury lamps are used to generate UV radiation, then curing capability is provided, but heat generation increases
Solution Approach 1:
The patent substitutes mercury arc lamps with UV LED technology, which inherently generates far less heat for the same UV output. This replacement eliminates the need for complex cooling systems and prevents heat-related issues during the curing process
Solution Approach 2:
The patent addresses the heat issue by using UV LEDs that convert electrical energy directly to UV light with minimal thermal byproduct, transforming the harmful heat generation characteristic of mercury lamps into a beneficial low-heat operation that simplifies the curing system
3Illumination intensity
If mercury lamps with wide spectrum are used, then UV radiation is generated, but energy waste increases
Solution Approach 1:
The patent selects UV LEDs with specific wavelength parameters that match the absorption characteristics of the coating materials. This targeted wavelength selection ensures that nearly all electrical energy input is converted to useful UV radiation at the optimal curing wavelength, minimizing energy waste across the electromagnetic spectrum
4Loss of time
If high intensity UV radiation is used for curing, then curing time is reduced, but UVLED current requirements increase
Solution Approach 1:
The patent employs pulsed or intermittent UV LED operation patterns, switching UV LEDs on and off in synchronization with the fiber coating process. This periodic activation delivers concentrated UV intensity during active periods to maintain fast curing speeds while reducing overall energy consumption compared to continuous high-current operation
Solution Approach 2:
The patent dynamically adjusts the current to UV LEDs based on real-time process conditions, fiber speed, and coating characteristics. This dynamic control allows the system to optimize the balance between UV intensity and current consumption, maintaining effective curing times without excessive energy use
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 UVLED array system efficiently cures glass fiber coatings at higher speeds with reduced energy and heat, ensuring even curing and increased production rates while minimizing waste and extending UVLED source lifespan.
Implementation Method 1
UVLED arrays with overdriven UVLED sources that emit UV radiation
Implementation Method 2
UV radiation from the first UVLED array is emitted to promote the curing of the glass-fiber coating
Data Source
Figure 1
Figure 2A~2D
Figure 3
AI summary
A UVLED apparatus and a related method provide increased UVLED intensity to promote efficient curing of a coated glass fiber. The apparatus employs a plurality of UVLED sources, each UVLED source emitting an oscillating output of ultraviolet radiation. Typically, at least two of the UVLED sources have oscillating outputs of ultraviolet radiation that are out of phase with one another. During curing, an incompletely cured coating on a glass fiber absorbs electromagnetic radiation emitted from the UVLED sources.