Integral Flexographic Printing Plate Assembly
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Solution Overview
Problem
The existing assembly process for flexographic printing plates, involving separate carrier, cushion, and photopolymer layers, is time-consuming and prone to stacking tolerance issues due to individual layer variations, necessitating a more efficient method for assembling these components.
Innovation Solution
An integral printing plate assembly comprising a non-extensible carrier layer, one or more cushion layers, and one or more photopolymer layers, where the layers are provided as a single unit, eliminating the need for prior assembly and allowing precise relief depth control through digital imaging photopolymerization, thereby eliminating the back exposure step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate carrier layer, cushion layer, and photopolymer layer are assembled using adhesive tapes, then the components can be attached to the printing cylinder, but the assembly process is time-consuming and subject to stacking tolerance problems
Solution Approach 1:
The patent combines the carrier layer, cushion layer, and photopolymer layer into a single integrated printing plate assembly. The carrier layer serves as a common substrate to which both the cushion layer and photopolymer layer are permanently bonded, eliminating the need for separate assembly operations with adhesive tapes and reducing assembly time while maintaining proper stacking tolerances.
2Ease of operation
If separate carrier layer, cushion layer, and photopolymer layer are assembled using adhesive tapes, then the components can be attached to the printing cylinder, but stacking tolerance variations occur due to tolerance variations in each individual layer
Solution Approach 1:
The patent integrates multiple layers into a single assembly where the carrier layer, cushion layer, and photopolymer layer are permanently bonded together. This integration eliminates the cumulative stacking tolerance errors that occur when separate layers are assembled using adhesive tapes, ensuring consistent registration and print quality.
3Reliability
If back exposure step is used to establish a floor, then the photopolymerizable layer can be polymerized, but the relief depth precision is reduced
Solution Approach 1:
The patent removes the back exposure step from the photopolymerization process. Instead of using back exposure to establish a floor, the invention directly forms the desired relief image through front exposure only, thereby eliminating the compromise in relief depth precision that results from the back exposure approach.
4Manufacturing precision
If digital imaging photopolymerization is used, then the back exposure step is eliminated and precise relief depth is achieved, but the process requires integral unit provision
Solution Approach 1:
The patent integrates the carrier layer, cushion layer, and photopolymer layer into a single integral unit that is provided ready-to-use. This integration, while increasing manufacturing complexity, enables the elimination of the back exposure step and achieves precise relief depth through digital imaging photopolymerization, ultimately simplifying the overall process by removing unnecessary steps.
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 solution simplifies the assembly process, reduces labor costs, ensures precise relief depth, and improves print quality and registration, eliminating stacking tolerance issues and the need for a back exposure step, resulting in higher predictability and efficiency in flexographic printing.
Implementation Method 1
Upon exposure of the photopolymer plate from the back to actinic radiation, polymerization of the photopolymerizable layer occurs.
Data Source
AI summary
A printing plate assembly for use in flexographic printing application is provided which includes an integral carrier layer, one or more cushion layers, and one or more photopolymer layers. The photopolymer layer(s) in the integral assembly are provided with relief images using digital imaging photopolymerization, which eliminates the need for a back exposure step and provides a precise relief depth for the plate.