Liquid Ejection Chip Channel Partitioning for Ink Sealing
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Solution Overview
Problem
Existing liquid ejection heads face challenges in maintaining sealing properties between channels due to downsizing, which can lead to ink color mixture.
Innovation Solution
A method involving transfer molding with a molten resin to form a resin member on a substrate, creating partitions between channels using protrusions and resin, ensuring a longer joint portion to maintain sealing even with downsizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the recording head is downsized to suppress power consumption, then the power consumption is reduced, but the intervals of the channels are narrowed which may result in loss of sealing property between channels
Solution Approach 1:
The patent extends the sealing structure from a single-plane bond to a three-dimensional configuration by adding protrusions that protrude from one plate toward an adjacent plate. This dimensional extension creates overlapping sealed regions that prevent ink leakage even when channel intervals are narrow, thus resolving the contradiction between downsizing and maintaining sealing reliability.
Solution Approach 2:
The protrusions are designed to extend beyond the bond line before bonding occurs, creating a preliminary sealing barrier. This preliminary action ensures that even if the bond line itself is narrow, the protrusions provide an additional sealing margin that prevents ink leakage, thereby maintaining reliability during downsizing.
2Volume of moving object
If the intervals of the channels are narrowed due to downsizing, then the recording head size is reduced, but the bonded portions between adjacent channels are narrowed which may result in color mixture of ink
Solution Approach 1:
The patent adds a vertical dimension to the sealing structure by creating protrusions that extend from one plate toward the adjacent plate. This three-dimensional sealing structure increases the effective sealing area without increasing the horizontal footprint, allowing narrow channel intervals while preventing ink color mixture through the extended protrusion barriers.
Solution Approach 2:
The sealing structure is segmented into multiple functional zones: the bond line between plates and the protrusions extending from each plate. This segmentation creates redundant sealing barriers, so that even if one sealing interface is compromised, the other protrusion barriers continue to prevent ink color mixture.
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
Ensures effective sealing between channels, preventing ink mixture even with downsized configurations.
Implementation Method 1
filling a molten resin into a mold into which a substrate in which the ejection unit is installed on one surface and a groove and a protrusion for forming the channels are formed on the other surface is loaded, and curing the molten resin, thereby forming a resin member on the protrusion
Data Source
AI summary
A technique capable of ensuring a sealing property between channels even with downsizing is to be provided. A method for manufacturing a liquid ejection chip equipped with an ejection unit which is configured to be capable of ejecting a plurality of liquids, and a plurality of channels which are configured to separately store the plurality of liquids to be supplied to the ejection unit, includes: filling a molten resin into a mold into which a substrate in which the ejection unit is installed on one surface and a groove and a protrusion for forming the channels are formed on the other surface is loaded, and curing the molten resin, thereby forming a resin member on the protrusion with the molten resin, the resin member forming a partition separating a space within the channels adjacent to each other.