Resin Damper Wall for Liquid Droplet Ejection Head
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid droplet ejection heads face challenges in securing sealing and achieving high damper effects while minimizing driving energy, due to issues such as impurity-induced damage, increased passage resistance, and the need for high drive voltage, particularly with metal damper plates and resin-based solutions.
Innovation Solution
A liquid droplet ejection head design featuring a passage unit with a manifold plate, a damper plate having a resin portion that is elastically deformable and covers the damping space, reducing the thickness of the outflow passage and enhancing the flexibility of the damper wall, thereby improving damping effects and reducing liquid passage resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the damper wall is reduced to improve damper effect, then the flexibility of the damper wall is improved, but impurities in the metal material may cause partial damage or cracks on the damper wall
Solution Approach 1:
The damper plate is constructed as a composite structure with a metal base portion and a resin portion. The resin portion covers the damping space and forms the thin damper wall, combining the rigidity of metal with the flexibility and impurity-free properties of resin. This composite approach allows the damper wall to be made thinner for improved flexibility without the risk of impurity-induced cracks that would occur in pure metal structures.
2Strength
If the area of the damper wall is increased to improve damper effect, then the damping capability is enhanced, but the passage resistance of the outflow passage increases
Solution Approach 1:
The resin portion is strategically positioned to cover only the damping space and form the damper wall where flexibility is needed, while leaving the outflow passage region clear. This localized application of the resin material provides damping functionality without obstructing the liquid flow path, thereby avoiding increased passage resistance.
3Strength
If a resin sheet is used as the damper wall to improve flexibility, then the damper effect is enhanced, but the outflow passage length increases due to the thickness of the resin sheet
Solution Approach 1:
The resin portion is designed to be stored within the manifold hole, nesting the damper structure within the existing manifold plate geometry. This allows the resin portion to form the flexible damper wall without adding external thickness that would extend the outflow passage length, as the resin is contained within the pre-existing structural envelope.
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
The solution effectively secures sealing between the common liquid chamber and the damper chamber, reduces the drive voltage of the actuator, and enhances the damper effect, preventing communication between chambers even at the thinnest portions, thus improving the overall performance of the ink jet head.
Implementation Method 1
pressure fluctuations caused by the backward components are absorbed by elastic deformation of the damper wall
Data Source
AI summary
An object of the present invention is to provide a liquid droplet ejection head capable of securing sealing of a common liquid chamber and realizing a high damper effect while suppressing a driving energy of the liquid droplet ejection head. A passage unit includes manifold plates, and a damper plate which is stacked on the manifold plates and has a damper wall facing a common liquid chamber. The damper plate is constituted by a base portion having a damping space at a position corresponding to the manifold holes in plan view, and a resin portion stacked on the base portion. The resin portion is formed to cover at least a portion above and around the damping space to constitute the damper wall, be smaller in a contour shape than the common liquid chamber in plan view, and be stored in the manifold holes.