Flexible Printing Plate Exposure Roller for Uniform UV Curing
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Solution Overview
Problem
Existing exposure technologies for flexible printing plates suffer from inconsistent exposure quality due to variations in exposure time and temperature across different parts of the plate, primarily caused by the use of movable ultraviolet lamps and the presence of glass plates that refract light and affect temperature distribution.
Innovation Solution
A Uniform Exposure apparatus that employs a single-variable exposure method using a rotating exposure roller with an integrated ultraviolet lamp, air exhaust mechanism, and temperature control systems to ensure uniform exposure and consistent temperature across the flexible printing plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a movable ultraviolet lamp is used to expose the flexible printing plate, then the exposure process can be completed, but the exposure time and temperature become inconsistent across different parts of the plate
Solution Approach 1:
Instead of moving the ultraviolet lamp over the printing plate as in conventional technology, this invention inverts the approach by keeping the ultraviolet lamp stationary and rotating the printing plate around it. The printing plate is wound on the exposure roller and rotated to bring different areas sequentially past the fixed ultraviolet lamp, ensuring uniform exposure time and temperature across all parts of the plate.
Solution Approach 2:
The invention introduces dynamic rotation of the exposure roller to achieve uniform exposure. The roller driving mechanism rotates the exposure roller at a controlled speed, ensuring that all areas of the flexible printing plate pass uniformly under the stationary ultraviolet lamp, thereby maintaining consistent exposure time and temperature throughout the plate.
2Ease of operation
If a transparent glass plate is used to support the flexible printing plate, then the plate can be held in place, but the glass plate refracts ultraviolet light and creates temperature fluctuations
Solution Approach 1:
The invention completely removes the transparent glass plate from the exposure system. Instead of placing the flexible printing plate on a glass plate as in conventional technology, the plate is directly wound on the exposure roller. This eliminates the glass plate's refractive effects on ultraviolet light and its associated temperature fluctuations, ensuring uniform light intensity and exposure quality.
3Productivity
If the ultraviolet lamp irradiates through the glass plate to reach the bottom surface of the flexible printing plate, then exposure can be achieved, but the light intensity is weaker compared to direct irradiation
Solution Approach 1:
By removing the glass plate entirely, the ultraviolet lamp can directly irradiate both the top and bottom surfaces of the flexible printing plate as it rotates on the exposure roller. This eliminates the refractive loss of light intensity that occurred when irradiating through the glass plate, ensuring strong and uniform light intensity across all areas of the plate.
Solution Approach 2:
The rotation of the exposure roller brings different areas of the flexible printing plate sequentially into direct contact with the ultraviolet lamp. This dynamic approach ensures that both surfaces of the plate receive direct, intense ultraviolet irradiation without the attenuation caused by glass plate refraction, achieving uniform and sufficient light intensity throughout the exposure process.
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 apparatus achieves uniform exposure by minimizing the effects of different media on the plate, maintaining consistent exposure time and temperature, thereby improving the overall quality of the printed images.
Implementation Method 1
The transparent parts transmit ultraviolet light, and the initiator in the photosensitive elastomer decomposes into free radicals, initiating the reaction of cross linkable monomers for curing
Implementation Method 2
The ultraviolet light is refracted to a certain extent by the transparent glass plate, resulting in the light intensity irradiating the bottom of the flexible printing plate being weaker
Data Source
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AI summary
The present disclosure relates to the technical field of exposure equipment, and in particular, to a Uniform Exposure apparatus for flexible printing plate. The Uniform Exposure apparatus for flexible printing plate includes: a base, the base including a housing and a storage cavity, the housing covering the storage cavity; an exposure roller, the exposure roller being disposed in the storage cavity, two ends of the exposure roller being rotatably connected to two opposite inner sidewalls of the housing respectively, and the flexible printing plate being wound and laid on the surface of the exposure roller; a roller driving mechanism, the roller driving mechanism being installed in the storage cavity, an output end of the roller driving mechanism being assembled with one end of the exposure roller, and the roller driving mechanism being used to drive the exposure roller to rotate; a positioning mechanism, the positioning mechanism being rotatably installed in the storage cavity, and one side of the positioning mechanism being pressed against the surface of the flexible printing plate; an ultraviolet lamp, the ultraviolet lamp being installed on one side of the exposure roller, and the ultraviolet lamp being aligned with the exposure roller. The device can improve the overall exposure quality of the flexible printing plate.