Ink Printer Dryer Negative Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ink printing apparatuses face the challenge of wave formation in the recording medium during printing pauses, leading to warping and potential damage to print heads due to uneven drying, which causes segments of the medium to contract and form waves.
Innovation Solution
The implementation of a dryer with a heating saddle and a drying channel that uses adjustable negative pressure to dry the ink during printing, and deactivates this pressure during pauses to prevent the recording medium from coming into contact with the heating saddle, thereby minimizing heat transfer and wave formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the dryer heating capacity is increased to ensure complete drying during printing operation, then the drying efficiency is improved, but wave formation and warping occur during printing pauses due to excessive heat storage
Solution Approach 1:
The patent applies dynamics by making the negative pressure generation dynamic and adjustable based on printing operation status. The controller activates negative pressure during printing pauses to prevent wave formation, and adjusts or deactivates it during normal printing to maintain proper drying contact. This dynamic control resolves the contradiction between maintaining high drying efficiency and preventing moisture uniformity issues during pauses.
Solution Approach 2:
The patent changes the pressure parameter in the drying channel based on operational conditions. By adjusting the negative pressure level according to whether the printer is actively printing or paused, the system optimizes the balance between drying effectiveness and wave prevention, resolving the contradiction between drying efficiency and moisture uniformity.
2Duration of action of stationary object
If the recording medium is kept in contact with the heating saddle during printing pauses to maintain drying, then drying continuity is improved, but wave formation occurs due to excessive drying and contraction
Solution Approach 1:
The system dynamically adjusts the negative pressure application based on real-time detection of printing operation status. During pauses, negative pressure is activated to lift the medium and prevent contact with the heating saddle, avoiding excessive drying and wave formation. During active printing, the system maintains appropriate contact for continuous drying. This dynamic approach resolves the contradiction between drying continuity and shape stability.
3Stability of the object's composition
If the negative pressure is continuously applied to prevent wave formation during pauses, then wave formation is reduced, but drying efficiency decreases during printing operation
Solution Approach 1:
The controller dynamically controls the negative pressure generation based on printing operation detection. Negative pressure is applied selectively during pauses when wave formation risk exists, and adjusted or deactivated during active printing when drying contact is needed. This dynamic control prevents wave formation without compromising drying efficiency during operation.
Solution Approach 2:
The system applies negative pressure periodically based on the printing operation cycle - activating during pauses and deactivating during active printing. This periodic application pattern ensures wave prevention when needed while maintaining drying efficiency during production, resolving the contradiction between stability and productivity.
4Manufacturing precision
If the print heads are positioned closer to the recording medium to improve print quality, then printing precision is improved, but the risk of damage from wave contact increases
Solution Approach 1:
The system applies preliminary anti-action by detecting printing pause conditions and activating negative pressure before waves can form and reach the print heads. This preventive measure eliminates the hazard of wave contact, allowing the system to maintain close print head positioning for high print quality without compromising reliability.
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 approach significantly reduces wave formation in the recording medium, preventing overheating and maintaining the medium's moisture levels, thus minimizing warping and protecting print heads from damage.
Implementation Method 1
A negative pressure is generated in the drying channel via an air exhaust arranged at one end of the drying channel
Implementation Method 2
a dryer having at least one heating saddle and a drying channel arranged at the heating saddle. In the dryer the recording medium is directed past the heating saddle
Implementation Method 3
the heating saddle is then in contact with the recording medium in order to dry the ink on the recording medium
Data Source
AI summary
In a method to operate an ink printing apparatus, and in an ink printing apparatus, a recording medium is directed through a printer. The recording medium is subsequently supplied to a dryer having at least one heating saddle and a drying channel arranged at the heating saddle. In the dryer the recording medium is directed past the heating saddle. A negative pressure is generated in the drying channel via an air exhaust arranged at one end of the drying channel. In the printing operation, in a region of the heating saddle a negative pressure is exerted on the recording medium in a direction of the heating saddle so that the heating saddle is then in contact with the recording medium in order to dry the ink on the recording medium. Upon interruption of the printing operation with braking of the recording medium, the negative pressure in the direction of the heating saddle is deactivated at a beginning of the braking.