Electrostatic Belt Printing Inversion Drying Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
When printing on both sides of a medium using an electrostatic attracting belt, the attracting force can reduce if the printing duty on the first surface is high, leading to potential contact between the medium and the printing unit.
Innovation Solution
A liquid ejecting device that includes an electrostatic attracting belt, a printing unit, a transport unit, an inverting unit, and a control unit. The control unit determines the transport velocity and the number of staying media in the inverting unit based on the printing duty of the liquid discharged on the first surface, optimizing the drying period for printing on the second surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the printing duty on the first surface is increased to improve productivity, then the printing efficiency is improved, but the attracting force of the electrostatic attracting belt reduces causing the medium to potentially contact the printing unit
Solution Approach 1:
The system dynamically adjusts the transport velocity of the medium based on the printing duty of the first surface. When printing duty is high, the transport velocity is reduced to allow sufficient drying time, preventing medium contact with the printing unit. This dynamic adjustment resolves the contradiction between maintaining high productivity and ensuring reliable attracting force.
Solution Approach 2:
The control unit changes the transport velocity parameter according to the printing duty conditions. By varying this parameter in response to printing load, the system maintains optimal drying conditions while preserving productivity. The transport velocity is specifically adjusted to ensure the medium does not contact the printing unit even when printing duty is high.
2Manufacturing precision
If the transport period of the medium is increased to allow sufficient drying time, then the drying quality is improved, but the productivity of both-side printing deteriorates
Solution Approach 1:
The transport period is dynamically adjusted based on printing duty conditions rather than being fixed. When printing duty is high, the transport period is extended to ensure proper drying. When printing duty is low, the transport period is reduced to maintain high productivity. This dynamic approach resolves the contradiction between drying quality and productivity.
Solution Approach 2:
The control unit changes the transport velocity parameter to achieve the appropriate transport period. By adjusting this parameter based on printing duty, the system ensures sufficient drying time when needed while minimizing transport time to maintain productivity. This parameter adjustment strategy allows the system to adapt to varying printing conditions.
3Reliability
If the number of staying media in the circulation path is increased to prevent medium contact, then the reliability is improved, but the transport period increases reducing productivity
Solution Approach 1:
The number of staying media in the circulation path is dynamically adjusted based on printing duty conditions. When printing duty is high, more media are allowed to stay in the circulation path to ensure proper drying and prevent contact. When printing duty is low, fewer media stay to maintain efficient throughput. This dynamic adjustment resolves the contradiction between reliability and productivity.
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 ensures a sufficient drying period for the liquid on the first surface, even with high printing duty, thereby maintaining the attracting force during printing on the second surface, reducing the risk of medium contact with the printing unit, and improving the productivity of both-side printing.
Implementation Method 1
there is an electrostatic attracting belt. However, when printing is performed on both sides of the medium while the medium is being transported using the electrostatic attracting belt, the attracting force at the time of performing printing on the second surface may reduce
Data Source
AI summary
A liquid ejecting device includes: an electrostatic attracting belt configured to transport a medium; a printing unit configured to discharge a liquid to the medium transported by the electrostatic attracting belt to perform printing; a transport unit configured to transport the medium to the electrostatic attracting belt; an inverting unit configured to: enable a plurality of the media to stay; invert upside down the medium including a first surface on which printing is performed by the printing unit, such that a second surface is opposed to the printing unit; and transport the medium to the transport unit again; and a control unit configured to determine a transport velocity of the medium in the inverting unit and the number of the staying media that stay in the inverting unit, on a basis of information concerning a printing duty of the liquid discharged on the first surface.