Inkjet Sheet Drying with Staged Heating and Hot-Air Flow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet drying apparatuses in inkjet recording apparatuses face inefficiencies in preliminary drying, leading to potential blisters and reduced safety due to inefficient heat management and air flow in the drying process.
Innovation Solution
A sheet drying apparatus is designed with a preliminary drying portion upstream of the main drying portion, utilizing a sheet blowing fan and duct to direct hot air efficiently, preventing heat loss and enhancing preliminary drying efficiency while maintaining sheet stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single drying portion is used to dry sheets after inkjet printing, then the drying process is simple, but blisters may form and drying efficiency is reduced
Solution Approach 1:
The drying apparatus is divided into two distinct portions: a preliminary drying portion with a first drying unit that performs initial drying, and a main drying portion with a second drying unit that completes the drying process. This segmentation prevents blisters by progressively removing moisture without creating sudden thermal stress, while maintaining reasonable structural complexity through modular design
Solution Approach 2:
The preliminary drying portion performs initial drying action before the main drying portion. The first drying unit removes surface moisture and prepares the sheet for subsequent high-temperature drying, preventing blister formation by avoiding direct exposure to intense heat on fully wet sheets
2Productivity
If hot air is not efficiently directed in the drying process, then the apparatus structure is simple, but heat loss increases and drying efficiency decreases
Solution Approach 1:
A blowing fan is introduced to actively circulate hot air through the drying chambers. The fan forces hot air to flow over the sheets in the preliminary drying portion and then into the main drying portion, significantly improving heat transfer efficiency and reducing energy loss compared to passive convection alone
Solution Approach 2:
Hot air acts as an intermediary heat transfer medium. The blowing fan directs this hot air through a controlled path, first through the preliminary drying portion and then into the main drying portion, efficiently transferring thermal energy to the sheets while minimizing heat loss to the surrounding environment
3Stability of the object's composition
If preliminary drying is not performed, then the drying process is shorter, but sheet stability decreases and blisters form
Solution Approach 1:
The preliminary drying portion performs the necessary initial drying action to stabilize the sheet before main drying. By removing surface moisture and gradually heating the sheet in the first drying unit, the sheet structure is stabilized and prepared to withstand the more intense drying conditions in the second unit without forming blisters
Solution Approach 2:
The drying process is segmented into two stages with different functions: preliminary drying for sheet stabilization and main drying for complete moisture removal. This segmentation allows each stage to be optimized for its specific purpose, maintaining sheet stability while minimizing total drying time through efficient parallel processing
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 effectively prevents blisters and ensures safe, efficient drying of sheets by optimizing heat distribution and air flow, improving the overall drying process.
Implementation Method 1
The drying portion is arranged opposite the conveyance portion and heats and dries the sheet
Implementation Method 2
The drying portion is arranged opposite the conveyance portion and heats and dries the sheet
Implementation Method 3
The preliminary drying portion is arranged adjacently upstream of the drying portion with respect to a conveyance direction of the sheet, and preliminarily dries the sheet
Implementation Method 4
The preliminary drying portion is arranged adjacently upstream of the drying portion with respect to a conveyance direction of the sheet, and preliminarily dries the sheet
Data Source
AI summary
A sheet drying apparatus includes a conveyance portion, a drying portion, and a preliminary drying portion. The conveyance portion conveys a sheet on which an image is formed with ink containing moisture. The drying portion is arranged opposite the conveyance portion and heats and dries the sheet. The preliminary drying portion is arranged adjacently upstream of the drying portion with respect to the conveyance direction of the sheet, and preliminarily dries the sheet.