Printing Machine Blanket Wheel Sensor Monitoring
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Solution Overview
Problem
Existing printing machines face challenges in accurately measuring printing pressure due to thermal deformation of components, especially when atmosphere temperature changes, making it difficult to monitor the state of the machine effectively.
Innovation Solution
Incorporating a distance sensor and a temperature sensor in the blanket wheel of the printing machine to measure the distance and temperature of the printing plate, allowing for accurate monitoring of plate pressure and printing pressure, even with thermal deformation, and enabling the detection of abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a detector is provided outside the impression cylinder and plate cylinder to detect the distance between spindles, then the printing pressure can be monitored, but measurement precision deteriorates due to thermal deformation of components
Solution Approach 1:
A magnetic field is introduced as an intermediary between the distance sensor and the spindles. The magnetic field penetrates through the blanket wheel and plate cylinder without being affected by thermal deformation, allowing the distance sensor to accurately measure spindle positions even when components expand or contract due to temperature changes.
Solution Approach 2:
The mechanical measurement system is replaced with a magnetic field-based measurement system. Instead of directly measuring physical distances between spindles through contact or proximity sensors that are affected by thermal expansion, the system uses magnetic field interactions that remain stable under temperature variations, substituting a temperature-sensitive mechanical measurement with a temperature-insensitive magnetic measurement.
2Loss of information
If the distance between printing plate and blanket wheel is monitored to determine plate pressure, then printing state can be known, but abnormality detection is insufficient without temperature data
Solution Approach 1:
The distance sensor and temperature sensor are merged into a single integrated monitoring system that collects both mechanical position data and thermal data. This combination provides comprehensive information about the printing state, including both the physical distance between components and the temperature conditions, enabling more complete abnormality detection without requiring separate independent systems.
Solution Approach 2:
The sensor system is designed to perform multiple functions: the distance sensor measures both plate pressure and printing pressure conditions, while the temperature sensor monitors thermal states. This multi-functional approach allows a single sensor system to provide comprehensive monitoring of various printing parameters, reducing the need for multiple specialized sensors and simplifying the overall system architecture.
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
Enables precise monitoring of plate pressure and printing pressure, ensuring reproducibility and facilitating the identification of abnormalities, thus improving the operational reliability of the printing machine.
Implementation Method 1
a distance sensor provided in the blanket wheel and configured to measure a distance of the printing plate to the blanket wheel
Implementation Method 2
a temperature sensor provided in the blanket wheel and configured to measure a temperature of the printing plate
Data Source
AI summary
A printing machine includes: a printing plate attached to a plate cylinder; a blanket configured to transfer ink from the printing plate to a printed material; a blanket wheel configured to rotate the blanket; and at least one of a distance sensor or a temperature sensor. The distance sensor is provided in the blanket wheel and configured to measure a distance of the printing plate to the blanket wheel, and the temperature sensor is provided in the blanket wheel and configured to measure a temperature of the printing plate.