Dual-Mode Gas-Discharge Lamp Curing for Printing Coatings
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Solution Overview
Problem
The printing industry seeks low-cost, space-efficient curing solutions for coatings in printing machines that minimize the use of mercury vapor lamps and require fewer actuation components, with easier cooling and maintenance, while also addressing the ecological concerns associated with mercury vapor lamps.
Innovation Solution
The method employs a gas-discharge lamp, such as a xenon flash lamp, which can operate in two modes to provide different radiation spectra for pinning and final curing of radiation-curable coatings, using the same lamp for both processes and optimizing space and cooling requirements, eliminating the need for mercury vapor lamps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If mercury vapor lamps are used for final curing, then high-intensity short-wave UV radiation is achieved, but ecological harm increases and device complexity increases
Solution Approach 1:
The gas-discharge lamp operates in two distinct electrical operating modes with different radiation spectra. In the first mode, it emits longer-wave UV radiation for pinning. In the second mode, it emits shorter-wave UV radiation for final curing, matching the spectrum of mercury vapor lamps without using mercury. This parameter change resolves the contradiction by achieving high-intensity short-wave UV radiation without ecological harm.
2Adaptability or versatility
If separate LED lamps and mercury vapor lamps are used for pinning and curing, then appropriate radiation spectra are provided, but device complexity increases and maintenance difficulty increases
Solution Approach 1:
A single gas-discharge lamp is designed to perform both pinning and final curing functions by operating in two different electrical modes. The lamp can be selectively actuated in the first operating mode for pinning or in the second operating mode for final curing, eliminating the need for separate LED lamps and mercury vapor lamps. This multi-functionality reduces device complexity while maintaining radiation spectrum adaptability.
Solution Approach 2:
The gas-discharge lamp's electrical operating mode is dynamically changed based on the curing stage required. The control device selectively actuates the lamp in the first operating mode during pinning and in the second operating mode during final curing. This dynamic mode switching allows one lamp to replace multiple static lamps, reducing device complexity.
3Adaptability or versatility
If multiple separate radiation sources are used for pinning and curing, then specific radiation requirements are met, but space requirements increase and cooling requirements increase
Solution Approach 1:
One gas-discharge lamp replaces multiple separate radiation sources (LED lamp for pinning and mercury vapor lamp for curing) by performing both functions through electrical mode switching. This consolidation significantly reduces the space required in the printing machine while maintaining full curing process capability.
Solution Approach 2:
The functions of separate pinning and curing radiation sources are merged into a single gas-discharge lamp. The lamp combines the capabilities of both LED and mercury vapor lamps into one device, reducing space requirements and simplifying the overall system architecture.
4Adaptability or versatility
If multiple separate radiation sources are used for pinning and curing, then specific radiation spectra are provided, but cooling requirements and maintenance difficulty increase
Solution Approach 1:
A single gas-discharge lamp performs both pinning and final curing functions, eliminating the need for multiple separate radiation sources. This consolidation simplifies maintenance and spare parts supply, as only one lamp type needs to be maintained and replaced, while still providing the necessary radiation spectrum capability for both curing stages.
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 approach simplifies maintenance and spare parts supply by using a single control device for both pinning and curing, reduces ecological harm, and optimizes space and cooling in printing machines, enabling efficient curing of UV-curable coatings with reduced mercury vapor lamp usage.
Implementation Method 1
gas-discharge lamps such as xenon flash lamps may be actuated in two different modes of operation, in the process emitting radiation which is particularly suited for pinning and curing radiation-curable coatings in printing machines
Implementation Method 2
Those printing fluids are frequently composites on the basis of acrylates or other unsaturated compounds, which polymerize and are thus cured under the influence of UV light or electron radiation
Data Source
AI summary
A method of curing radiation-curable coatings in printing machines using UV light includes using the same light source or sources for the pinning and final curing operations in two different modes of operation suitable for pinning and for completely curing. The light sources are preferably gas-discharge lamps, in particular xenon flash lamps. A printing machine and a method for using at least one gas-discharge lamp are also provided.