Ultrasonic Cleaning Bar for In-Situ Printing Roller Cleaning
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Solution Overview
Problem
Existing cleaning processes for printing machine rollers require complex and costly operations, involving removal of the rollers from the machine, which is time-consuming, environmentally wasteful, and risks damage, while prior ultrasonic cleaning systems are inefficient due to energy dissipation and excessive fluid use.
Innovation Solution
An ultrasonic cleaning bar with releasable mounting brackets allows in-situ cleaning on the printing machine, minimizing downtime and skilled labor, using minimal fluid and enhancing ultrasonic wave resonance for effective ink removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the roller is removed from the printing machine for cleaning, then the cleaning can be performed in a bath of cleaning fluid, but the cleaning process becomes time-consuming and requires specialist lifting machinery
Solution Approach 1:
The invention extracts the cleaning function from the traditional bath-based system and integrates it directly onto the printing machine via a cleaning bar that contacts the roller surface in-situ, eliminating the need to remove the roller for cleaning
Solution Approach 2:
The cleaning bar acts as an intermediary device between the ultrasonic transducer and the roller surface, transferring ultrasonic vibrations directly to the roller while maintaining minimal fluid usage, thus resolving the contradiction between effective cleaning and time efficiency
2Reliability
If a large volume of cleaning fluid is used in the bath, then the roller can be fully immersed for cleaning, but the ultrasonic waves dissipate and lose strength before reflection
Solution Approach 1:
The invention applies ultrasonic cleaning locally at the contact point between the cleaning bar and roller surface rather than immersing the entire roller in a large bath, concentrating ultrasonic energy where it is most needed and preventing energy dissipation in large volumes of fluid
Solution Approach 2:
The invention extracts only the necessary amount of cleaning fluid from the traditional large bath and delivers it precisely to the cleaning bar-roller interface, eliminating the waste of ultrasonic energy in large volumes of fluid while maintaining cleaning effectiveness
3Reliability
If the roller is removed from the printing machine, then cleaning can be performed, but the roller may be damaged and must be replaced
Solution Approach 1:
The cleaning system is self-contained on the printing machine itself, with the cleaning bar contacting the roller in-situ without requiring removal, thus eliminating the risk of damage associated with handling and transporting the roller
Solution Approach 2:
The cleaning bar serves as a protective intermediary that performs cleaning without direct human handling of the roller, eliminating the risk of damage from specialist operations while maintaining cleaning effectiveness
4Reliability
If multiple rollers are cleaned by removal and immersion, then each roller can be cleaned thoroughly, but the total downtime and fluid consumption increase significantly
Solution Approach 1:
The invention extracts the cleaning function from the traditional batch processing system and integrates it into a continuous in-situ cleaning process, allowing rollers to be cleaned without removing them from the printing machine
Solution Approach 2:
The cleaning bar enables continuous cleaning of rollers as they pass through the printing machine without interruption to the printing process, maintaining productivity while ensuring thorough cleaning of each roller surface
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
Reduces cleaning time and costs, preserves roller integrity, and minimizes environmental impact by enabling efficient, in-situ cleaning with reduced fluid consumption and improved ultrasonic energy transfer.
Implementation Method 1
transducers are used to induce ultrasonic waves within the cleaning fluid which acts to loosen the dried ink from the surface of the engraved roller
Implementation Method 2
using minimal fluid and enhancing ultrasonic wave resonance for effective ink removal
Data Source
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AI summary
There is disclosed an ultrasonic cleaning bar for cleaning a roller of a printing machine. The ultrasonic cleaning bar comprises: an elongate body defining a longitudinal axis; a doctor blade supported by the body; an ultrasonic transducer for generating ultrasonic waves within the cleaning fluid; and first and second formations positioned at longitudinally opposite ends of the body, the first formation being releasably engageable with a first mounting bracket of the printing machine and the second formation being releasably engageable with a second mounting bracket of the printing machine; and wherein, when the first and second formations are engaged with the first and second brackets, the doctor blade engages a surface of the roller, such that the body, the doctor blade and the roller define a trough therebetween configured to contain a cleaning fluid which contacts the roller.