Thermal Imaging Ink Curing for Precise Textile Temperature Control
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Solution Overview
Problem
Traditional curing methods, such as infrared and gas dryers, face challenges in maintaining consistent cure temperatures, leading to defects in ink curing due to variable belt speeds and heat transfer rates, which are inadequate for modern high-speed printing technologies.
Innovation Solution
A temperature curing apparatus utilizing thermal imaging sensors to monitor and control quartz heating elements, ensuring precise temperature control by adjusting the number of heating elements and air flow to maintain the ink at cure temperature without overheating the fabric, thereby reducing defects and increasing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If infrared dryers are used to cure ink, then heating speed is improved, but temperature control precision deteriorates leading to ink defects
Solution Approach 1:
The patent employs thermal imaging cameras to continuously monitor the temperature of the substrate and ink in real-time during the curing process. This feedback information is fed to a control system that dynamically adjusts the power output of infrared heating panels to maintain the ink at its cure temperature, preventing both under-curing and overheating defects.
Solution Approach 2:
The system transitions from static, fixed-power infrared heating to dynamic, variable-power heating controlled by real-time temperature feedback. The heating power is continuously adjusted based on the measured temperature of the ink and substrate, enabling precise temperature control while maintaining high heating speeds.
2Manufacturing precision
If gas dryers are used to cure ink, then temperature control is improved, but productivity deteriorates due to slow heat transfer
Solution Approach 1:
The patent replaces the convective heat transfer mechanism of gas dryers with direct infrared radiant heating. Infrared panels emit infrared energy that is absorbed directly by the ink and substrate, eliminating the need for heated air circulation and enabling much faster heating rates while maintaining precise temperature control through feedback.
Solution Approach 2:
The system utilizes the phase transition properties of infrared radiation, converting electrical energy directly into infrared radiant energy that can be absorbed by the ink molecules, causing rapid vibrational excitation and heating without requiring thermal conduction or convection through a gas medium.
3Productivity
If belt speed is increased to match printing capacity, then productivity is improved, but curing quality deteriorates due to insufficient heating time
Solution Approach 1:
The thermal imaging feedback system continuously monitors the temperature of the ink regardless of belt speed. The control system calculates the required heating power based on real-time temperature measurements and adjusts the infrared panel output accordingly, ensuring proper curing quality even at high production speeds where the substrate passes through the curing chamber quickly.
Solution Approach 2:
The system dynamically changes the heating parameter (infrared power output) based on the belt speed and real-time temperature feedback. At higher belt speeds, the system increases the infrared power density to compensate for the reduced residence time, maintaining adequate curing quality across a wide range of production speeds.
4Productivity
If higher infrared power is applied to cure ink faster, then productivity is improved, but harmful effects increase due to fabric scorching and ink dulling
Solution Approach 1:
The thermal imaging cameras monitor both the ink temperature and substrate temperature simultaneously. The control system uses this dual feedback to adjust the infrared power output, increasing power when the ink temperature is below cure temperature and decreasing power when the substrate temperature approaches scorching thresholds, thus preventing harmful effects while maintaining curing speed.
Solution Approach 2:
The system applies different heating strategies to different components: the infrared panels are controlled to deliver high power density to the ink layer for rapid curing, while the substrate temperature is simultaneously monitored and protected from excessive heating through feedback control, creating locally optimized heating conditions for each material.
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 apparatus achieves precise temperature control, reducing ink defects and enabling higher production volumes in a smaller footprint by applying radiant heat efficiently and reducing dye migration in synthetic fabrics.
Implementation Method 1
at least one thermal imaging sensor that is configured to image thermal radiation of the object
Implementation Method 2
at least one heating element that is configured to generate heat energy at the object
Implementation Method 3
quartz heating elements
Data Source
AI summary
An ink curing apparatus for curing ink on an object and method includes at least one thermal imaging sensor that is configured to image thermal radiation of the object and at least one heating element that is configured to generate heat energy. A control responsive to the imaging sensor controls the heating element. The control controls the heating element as a function of the thermal radiation of the object to heat the object to a particular radiation level. The method may be used to cure ink on the object. The object may be made of a textile. The method may be used with at least one chosen from screen printing, digital printing, sublimation ink printing, discharge ink printing, and pad printing.