Pressure-Compensating Emitters for Reduced Flow Flexographic Printing
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Solution Overview
Problem
Existing flexographic printing systems require high flow rates of processing solution, leading to increased costs and waste disposal issues, while also experiencing plate defects due to debris accumulation on micro-textured printing surfaces.
Innovation Solution
A processing system that includes a hollow tube with pressure-compensating emitters distributed along its length, which deliver pressurized processing liquid as controlled drips onto the printing plate, reducing the overall flow rate required while maintaining uniformity and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high flow rates of processing solution are used, then complete removal of unexposed photopolymer is achieved, but processing solution consumption increases and waste disposal costs increase
Solution Approach 1:
The patent changes the flow rate parameter from high to low, and uses pressure compensation mechanisms to maintain effective processing at reduced flow rates, thereby reducing processing solution consumption while maintaining complete removal of unexposed photopolymer
Solution Approach 2:
The patent implements flow rate feedback control to maintain consistent, reduced flow rates across all emitters, ensuring uniform processing effectiveness while minimizing overall processing solution consumption through precise control
2Productivity
If high flow rates of processing solution are used, then processing speed is maintained, but waste disposal issues increase
Solution Approach 1:
The patent changes the flow rate parameter from high to low, reducing waste generation while maintaining processing speed through pressure compensation that ensures consistent liquid delivery across all emitters
Solution Approach 2:
The patent converts the potential harm of reduced flow rates (incomplete processing) into a benefit by using pressure compensation to maintain effective processing at lower flow rates, thereby reducing waste while ensuring complete photopolymer removal
3Manufacturing precision
If processing solution is sprayed under pressure, then unexposed photopolymer is removed effectively, but debris accumulates on micro-textured printing surfaces
Solution Approach 1:
The patent uses hydraulic principles with pressure-compensating emitters to deliver processing liquid at controlled pressures, removing unexposed photopolymer effectively while the reduced flow rates prevent debris accumulation on micro-textured surfaces
Solution Approach 2:
The patent changes the flow rate parameter to reduced levels, which maintains effective photopolymer removal through pressure compensation while preventing the harmful effect of debris accumulation on the printing surface
4Stability of the object's composition
If processing liquid is applied at high flow rates, then uniform coverage is achieved, but total solution usage increases
Solution Approach 1:
The patent segments the processing liquid delivery into multiple pressure-compensating emitters distributed across the plate width, each maintaining uniform flow at reduced individual rates, achieving overall uniform coverage while minimizing total solution usage
Solution Approach 2:
The patent changes the flow rate parameter to reduced levels while using pressure compensation to maintain uniformity of application across all emitters, achieving stable composition distribution with lower total solution consumption
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 achieves a uniform application of processing liquid across the printing plate at a reduced total flow rate, minimizing solution usage and waste, and effectively preventing plate defects by ensuring consistent processing.
Implementation Method 1
Each pressure-compensating emitter can include a resilient planar member in the casing and positioned to form at least one resilient surface of the fluidic flow path... the resilient planar member is positioned to provide a variable outlet cross-sectional profile to the outlet in response to pressure inside the casing
Data Source
AI summary
A processing system for processing a flexographic printing plate can include a processing path for processing the flexographic printing plate. A hollow tube can be positioned to be extended across the processing path. A pressurized processing liquid supply system is provided. A plurality of pressure-compensating emitters are coupled to the hollow tube Each pressure-compensating emitter can include a casing having a fluidic flow path that is fluidly coupled with the hollow tube and having an outlet. Also, each emitter can include a resilient planar member in the casing and positioned to form at least one resilient surface of the fluidic flow path. Each pressure-compensating emitter is configured to control flow rate of the pressurized processing liquid to produce processing liquid drips from the outlet. The resilient planar member can be positioned to provide a variable outlet cross-sectional profile to the outlet in response to pressure inside the casing.