Liquid Jet Head Chip Flow Layout for Compact Ejection Performance
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Solution Overview
Problem
Conventional head chips face challenges in optimizing power consumption and flow channel resistance while maintaining desired ejection performance, leading to potential size growth in directions perpendicular to the ejection direction due to circulation paths extending only in directions perpendicular to the ejection direction.
Innovation Solution
The head chip design includes first and second ejection sections with jet channels and communication channels that intersect at right angles, allowing for adjustment of flow channel resistance by modifying the dimensions of connecting channels, thereby reducing size in directions perpendicular to the ejection direction while ensuring optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circulation path is elongated to optimize power consumption and flow channel resistance, then the ejection performance is improved, but the size of the head chip grows in the direction perpendicular to the ejection direction
Solution Approach 1:
The circulation path is reconfigured to extend in the ejection direction (longitudinal direction) rather than only in directions perpendicular to the ejection direction. This dimensional change allows the circulation path to be elongated without increasing the head chip size in the perpendicular direction, as the path utilizes the existing longitudinal space more effectively.
Solution Approach 2:
The circulation path is divided into multiple segments including a first circulation path from the pressure chamber to the flow channel, and a second circulation path from the flow channel back to the pressure chamber. This segmentation allows each path to be optimized independently and enables the overall circulation path to achieve desired length and resistance characteristics without requiring a single long perpendicular path.
2Reliability
If the dimension of the circulation path is increased to adjust flow channel resistance, then the ejection performance is optimized, but the head chip size increases in the direction perpendicular to the ejection direction
Solution Approach 1:
Instead of increasing the circulation path dimension in the perpendicular direction, the design utilizes the longitudinal dimension (ejection direction) to extend the circulation path. The first and second circulation paths are arranged to extend in the ejection direction, allowing flow channel resistance adjustment through length variation without increasing perpendicular size.
Solution Approach 2:
The flow channel resistance is adjusted by changing the dimension (length, width, or height) of the circulation path segments. By varying the dimensions of the first and second circulation paths in the longitudinal direction, the flow channel resistance can be optimized for ejection performance while maintaining a compact perpendicular footprint.
Data Source
AI summary
There are provided a head chip, a liquid jet head, a liquid jet recording device, and a method of manufacturing the head chip each capable of achieving a reduction in size in a direction perpendicular to the ejection direction while ensuring the desired ejection performance. The head chip according to an aspect of the present disclosure includes a first ejection section, a jet hole plate arranged at a first side in a first direction of the first ejection section, a return plate which has a plurality of first communication channels configured to individually communicate a plurality of first jet channels and a plurality of first jet holes with each other, and which is arranged between the first ejection section and the jet hole plate in the first direction, and a flow channel plate which has a plurality of first connecting channels individually communicated with the plurality of first communication channels to constitute first return channels together with the corresponding first communication channels, and a manifold communicated in a lump with the plurality of first connecting channels, and which is arranged at a second side in the third direction of the first ejection section.