Laminated Manifold Plate Rigidity via Segmented Ink Chambers
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Solution Overview
Problem
The existing liquid drop ejecting heads face challenges in maintaining rigidity and workability due to the increase in the number of common ink chambers and nozzle rows, leading to deformation and damage during handling and assembly processes.
Innovation Solution
The design incorporates a cavity section formed by laminating multiple plates with overlapping openings and partitioning portions between them, creating a common liquid chamber and supply path, which enhances rigidity and workability by reducing the area of narrow frame portions and maintaining uniform flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of nozzle rows and common ink chambers is increased to meet recording accuracy and speed demands, then recording performance is improved, but the number of long penetrating holes in manifold plates increases, causing frame portions to become narrower and rigidity to deteriorate
Solution Approach 1:
The patent divides the manifold plate into multiple layers (first manifold plate and second manifold plate) with partitioning portions that segment the single long penetrating hole into multiple smaller holes. This segmentation reduces the area of individual frame portions while maintaining overall structural integrity and rigidity, allowing more common ink chambers to be accommodated without compromising plate strength
Solution Approach 2:
The patent transitions from a single-plane manifold plate design to a multi-layered manifold plate structure. By adding the second manifold plate with partitioning portions, the design moves into the third dimension (laminating direction), creating a more complex spatial arrangement that maintains rigidity while accommodating increased numbers of common ink chambers and nozzle rows
2Quantity of substance
If the frame portions are decreased to accommodate more common ink chambers, then the number of nozzles increases, but the narrow frame portions bend downwardly during handling, causing deformation and damage
Solution Approach 1:
By segmenting the manifold plate into multiple layers with partitioning portions, the patent creates a more distributed structural framework. This segmentation prevents any single frame portion from becoming excessively narrow and vulnerable to bending, improving handling characteristics while accommodating more nozzles
Solution Approach 2:
The patent creates a composite manifold plate structure combining first and second manifold plates with partitioning portions. This composite construction provides enhanced structural stability and resistance to deformation during handling, while still allowing for an increased number of nozzles and common ink chambers
3Volume of stationary object
If two manifold plates are laminated to form the common ink chamber, then the chamber capacity increases, but the frame portions between adjacent long holes become narrow and elongated, remarkably deteriorating rigidity
Solution Approach 1:
The partitioning portions in the second manifold plate segment the long penetrating holes into multiple smaller holes. This segmentation creates additional frame portions that distribute and reinforce the structure, preventing the frame portions from becoming too narrow and maintaining rigidity while preserving the required chamber capacity
Solution Approach 2:
By introducing partitioning portions that extend in the laminating direction, the patent adds structural elements in the third dimension. This creates a more three-dimensional framework that reinforces the manifold plates without reducing the common ink chamber capacity
Data Source
AI summary
A liquid drop ejecting head includes a cavity section which is formed by laminating a plurality of plates including at least first and second manifold plates adjacent to each other in a laminating direction. Each of the first and second manifold plates includes an opening. The openings overlap with each other when viewed in the laminating direction. At least one of the openings includes: a first opening which extends in the first direction and serves as a common liquid chamber; a second opening which is adjacent to the first opening and serves as a supply path; and a partitioning portion disposed between the first opening and the second opening.