Inkjet Print Head Partition Design for Adhesive Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing inkjet print head designs face challenges in ensuring sufficient adhesive strength while preventing adhesive protrusion onto the ink supply port, which can block ink flow and lead to unstable ink ejection.
Innovation Solution
The design incorporates a support member with a partition that includes a first and second portion, where the second portion is closer to the print element substrate than the first, and the adhesive is applied between the substrate and the partition, allowing for a recess to hold the adhesive and prevent it from protruding onto the ink supply port, thereby maintaining adhesive strength and preventing ink flow hindrance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a step is provided in the support member to hold the adhesive, then adhesive protrusion onto the ink supply port is suppressed, but the adhesion surface area between the adhesive and the print element substrate is limited, making it difficult to ensure sufficient adhesive strength
Solution Approach 1:
The partition is divided into a first portion and a second portion at different heights, creating a stepped structure that segments the adhesive holding function from the support function. The first portion holds the adhesive while the second portion provides additional bonding surface area with the print element substrate, resolving the contradiction between preventing adhesive protrusion and ensuring sufficient adhesion area.
2Strength
If adhesive is applied generously to ensure sufficient adhesion, then adhesive strength is improved, but adhesive protrusion onto the ink supply port increases, hindering ink supply
Solution Approach 1:
The first portion of the partition acts as an intermediary structure between the adhesive and the ink supply port. It provides a dedicated holding region for the adhesive that is elevated above the ink supply port level, allowing the adhesive to be applied in sufficient quantity for strong bonding while the first portion prevents it from protruding into the ink supply path.
Data Source
AI summary
An inkjet print head includes a print element substrate having an ejection port array of a plurality of ejection ports arranged and an ink supply port that supplies the ink to the ejection ports. A support member has a partition and an opening that supplies the ink to the ink supply port, in which the print element substrate and the support member are bonded by an adhesive. The partition includes a first portion and a second portion. The second portion is located between individual extension lines of two surfaces of the first portion. An end of the surface of the print element substrate facing the second portion is located between an extension line of the surface of the first portion and an extension line of a surface of the second portion.