UV Curing Inkjet Head Thermal Isolation via Segmented Support
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Solution Overview
Problem
Inkjet recording apparatuses using ultraviolet curing ink face issues with heat propagation from the light radiation device, leading to temperature distribution irregularities and image deterioration when the recording medium conveyance is stopped due to jamming, causing uneven image formation.
Innovation Solution
The apparatus employs a gap between two supporting members to prevent heat propagation from the light radiation device, using a first supporting member for ink emission and a second supporting member for ultraviolet ray irradiation, with a cooling section to absorb and radiate heat, ensuring stable conveyance and high-resolution image recording.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light radiation device is fixed to continuously radiate ultraviolet ray towards the recording medium, then the curing effect is improved, but heat accumulates on the conveyance device causing temperature distribution irregularity and image deterioration
Solution Approach 1:
The patent divides the recording medium support into two separate supporting members (first and second supporting members) positioned at different locations. The first supporting member supports the recording medium at the ink emission position, while the second supporting member supports it at the ultraviolet radiation position. This segmentation prevents heat from the fixed light radiation device from propagating to the conveyance device, eliminating temperature distribution irregularities while maintaining continuous curing
Solution Approach 2:
The patent introduces a gap between the first and second supporting members as an intermediary space. This gap acts as a thermal barrier that prevents heat propagation from the light radiation device to the conveyance device, while still allowing the recording medium to be conveyed and supported continuously through both positions
2Object-affected harmful factors
If the light radiation device moves to avoid facing the recording medium when jamming occurs, then the recording medium is protected from continuous ultraviolet radiation, but extensive heat propagation occurs to the upstream conveyance device causing temperature distribution irregularity
Solution Approach 1:
By segmenting the support structure into two separate supporting members positioned at different locations, the patent ensures that even when the light radiation device moves away during jamming, the first supporting member remains in its original position. This prevents heat propagation to the upstream conveyance device, maintaining temperature uniformity while still protecting the recording medium from continuous ultraviolet radiation
Solution Approach 2:
The patent pre-positions the first and second supporting members at different locations before any jamming occurs. This preliminary arrangement ensures that the thermal barrier (gap between supporting members) is already in place, preventing heat propagation issues before they can occur during jamming situations
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
This solution effectively inhibits heat propagation, maintaining a stable temperature distribution and achieving high-resolution image recording without image irregularities, even with high-viscosity and low-wetability inks, by isolating the heat generation from the ink emission area.
Implementation Method 1
a light radiation device to radiate an activation energy ray towards the recording medium
Implementation Method 2
the first supporting member and second supporting member are arranged in a recording medium conveyance direction with a gap between the members thereof
Implementation Method 3
it has a certain sensitivity for ultraviolet ray, it is cured by irradiation of the ultraviolet ray from a light radiation device after landing on the recording medium
Data Source
AI summary
The present invention provides an inkjet recording apparatus, which performs high resolution image recording by inhibiting propagation of heat from a light-radiation device to a recording medium, is provided with a recording medium conveyance device to convey a recording medium in a conveyance direction; a recording head 10 to emit ink from a nozzle towards the recording medium; a first supporting member 5 to convey the recording medium so that the recording medium faces the recording head; a light radiation device 16 to radiate an activation energy ray towards the in emitted from the recording head; and a second support member 7 to convey the recording medium in a conveyance direction so that the recording medium faces the light radiation device; wherein between the first supporting member 5 and the second supporting member 7, in a recording medium conveyance direction, there are disposed a guide section 6 having a cooling device.