Liquid Jetting Apparatus Floating Medium Detection Control
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Solution Overview
Problem
Existing liquid jetting apparatuses face efficiency deterioration when medium floating occurs, as they require stopping the medium feed and processing, leading to prolonged downtime and reduced production efficiency.
Innovation Solution
A liquid jetting apparatus with a medium feed unit, transport unit, liquid jet head, and detection units that allow continuous medium feeding and movement of the liquid jet head to a retreat position upon detection of floating, while reducing the intensity of drying processing, minimizing downtime and maintaining production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the medium feed is stopped when floating is detected, then the liquid jet head collision is avoided, but the production efficiency deteriorates due to prolonged downtime
Solution Approach 1:
The patent segments the control of medium feeding and liquid jetting into independent controllable units. The medium feed unit can continue feeding while the liquid jet head is moved to retreat position, allowing these functions to operate independently rather than stopping the entire system.
Solution Approach 2:
The liquid jet head is made dynamically movable between jetting position and retreat position through the head moving unit. This dynamic adjustment allows the system to adapt to floating conditions by moving the head away when needed while maintaining continuous medium feed, resolving the contradiction between protection and productivity.
2Reliability
If the liquid jet head is moved to retreat position, then the collision with floating medium is avoided, but the liquid jetting processing is interrupted
Solution Approach 1:
The medium feed unit continues to feed mediums continuously even when the liquid jet head is in retreat position. This ensures that the useful action of medium transport remains uninterrupted, reducing the loss of time while maintaining head protection.
Solution Approach 2:
The liquid jet head periodically moves between jetting position and retreat position based on floating detection. This periodic adjustment allows the system to briefly interrupt jetting when needed while resuming quickly, minimizing overall processing interruption time.
3Loss of energy
If the drying processing intensity is reduced during floating, then the energy consumption is lowered, but the processing efficiency decreases
Solution Approach 1:
The drying processing intensity parameter is dynamically adjusted based on floating detection. When floating is detected, the drying intensity is reduced to lower energy consumption; when floating is resolved, the intensity returns to normal to maintain processing efficiency. This parameter change resolves the contradiction between energy loss and productivity.
Data Source
AI summary
There are provided a liquid jetting apparatus in which the deterioration of production efficiency is suppressed in a case in which the floating of a medium occurs, and a method of coping with the floating of a medium. A medium is fed; liquid is jetted to the medium, which is transported by a medium transport unit including a medium support surface on which the medium is supported and transporting the fed medium in a medium transport direction, by a liquid jet head; drying processing is performed on the medium, to which the liquid jetted from the liquid jet head adheres, at a position on the downstream side of the liquid jet head in the medium transport direction; and in a case in which the floating of the medium is detected at a position on the upstream side of the liquid jet head in the medium transport direction, the medium continues to be fed, the liquid jet head is moved to a retreat position from a liquid jet position, and the intensity of drying processing is suppressed in comparison with that in a liquid-drying processing-performing state in which drying processing is performed on the medium.