Oscillating Brush System for Flexographic Plate Cleaning
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Solution Overview
Problem
Existing systems for washing and cleaning flexographic printing plates are inefficient in removing non-polymerized portions and ensuring even brushing, leading to inconsistent plate quality and high maintenance and storage costs due to complexity and bulkiness.
Innovation Solution
A system with a closed housing and pairs of rollers or a pin bar attached to a chain for continuous plate transport, featuring rotating and oscillating cylindrical brushes with a linear oscillatory motion to ensure thorough cleaning and even surface treatment, and a simplified mechanics design that eliminates unnecessary parts and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional rotating brushes are used for washing printing plates, then the brushes can remove non-polymerized portions, but the brushing is uneven and polymer particles accumulate on the brushes reducing wash-out efficiency
Solution Approach 1:
The brush system is made dynamic by allowing the brush axis to oscillate back and forth while rotating. This dynamic motion ensures even distribution of brush contact across the printing plate surface, preventing polymer accumulation in fixed areas and maintaining consistent wash-out efficiency throughout the brushing process.
2Manufacturing precision
If brush action is increased to improve cleaning, then non-polymerized portions are removed more effectively, but polymer and monomer concentration increases locally causing high viscosity and reduced wash-out efficiency
Solution Approach 1:
The oscillating brush motion dynamically distributes the cleaning action across different areas of the printing plate, preventing localized accumulation of polymer and monomer. This dynamic distribution maintains lower local concentrations, reducing viscosity increases and preserving wash-out efficiency while still achieving effective cleaning.
3Manufacturing precision
If the washing system is made more complex to improve cleaning quality, then plate treatment quality improves, but device complexity and maintenance costs increase
Solution Approach 1:
The system achieves improved plate treatment quality through a relatively simple oscillating mechanism that can be integrated into existing brush systems. The oscillation adds a degree of freedom to the brush motion without requiring completely complex mechanical structures, thereby improving cleaning uniformity while controlling device complexity.
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 system effectively removes non-polymerized portions, provides consistent plate quality, reduces complexity and bulkiness, and enhances reliability and serviceability, resulting in improved washing efficiency and reduced maintenance costs.
Implementation Method 1
the printing plate to be treated contacts the liquid contained in a vessel, of which the wash-out quality steadily decreases as a consequence of the use of the active contents of the liquid and the pollution of the liquid by particles washed out or dissolved from the plates to be treated
Implementation Method 2
A further example for an apparatus for the treatment of printing plates can be found in US6012193 A. However, known systems cannot perfectly remove the non-polymerized portions, and in particular do not provide an even brushing of all the points of the surface and the relief of the printing plate to be treated
Data Source
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AI summary
There is provided a system for processing/washing/cleaning flexographic printing plates. More specifically the invention relates to the development in several processing/washing/cleaning stations utilizing oscillating rotating brushes in order to prepare the plates for use as printing plates in a printing operation.