Piezoelectric Actuator Component for Droplet Ejection Head
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Solution Overview
Problem
Existing droplet ejection head architectures struggle to be flexible enough to accommodate different types of fluids and performance requirements, making it difficult to produce variants that can operate at higher frequencies or with aqueous or electrically conducting inks.
Innovation Solution
The development of an actuator component for droplet ejection heads, featuring a substrate with strips of piezoelectric material and cover parts with strategically placed openings, allows for customization to address various market and customer requirements. This design includes Alternate Line Active (ALA) and flow restrictor configurations to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible droplet ejection head architecture is designed to accommodate different fluids and performance requirements, then adaptability is improved, but device complexity increases
Solution Approach 1:
The actuator component is divided into modular elements including a substrate, multiple piezoelectric strips, and cover parts with openings. This segmentation allows different configurations (ALA design, flow restrictors) to be created by varying the arrangement and configuration of these modular components, enabling adaptability without requiring entirely different device architectures.
Solution Approach 2:
The actuator component is designed as a universal platform that can be configured to support multiple fluid types (aqueous, electrically conducting inks) and performance requirements (higher frequencies) through a single base architecture. The same component can be adapted for different applications by modifying the openings and fluid chamber configurations rather than designing separate specialized actuators for each application.
2Adaptability or versatility
If printhead variants are customized to address different market requirements, then adaptability is improved, but manufacturing complexity increases
Solution Approach 1:
The modular segmented design with standardized piezoelectric strips and cover parts enables different printhead variants to be manufactured using the same base process. Variants are created by varying the configuration of modular components rather than requiring entirely different manufacturing processes, thereby maintaining ease of manufacture while achieving customization.
Solution Approach 2:
Different printhead variants are achieved by changing parameters such as the number, size, and arrangement of openings in the cover parts, as well as the configuration of fluid chambers. These parameter changes allow customization for different market requirements while using the same fundamental manufacturing process and component architecture.
3Productivity
If a base actuator component architecture is used to produce variants, then productivity is improved, but device complexity increases
Solution Approach 1:
A universal base actuator component architecture is designed that can produce multiple variants through configuration changes rather than requiring separate specialized components for each application. This universal architecture supports different fluid types and performance requirements while maintaining a consistent base design, thereby improving productivity without proportionally increasing complexity.
Solution Approach 2:
The segmented modular architecture allows for rapid configuration and reconfiguration of actuator components to meet different production requirements. The standardized modules can be assembled in different arrangements to create variants, enabling high production responsiveness while keeping the underlying architecture manageable and systematic.
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 proposed solution enables ready customization of printhead variants, allowing for operation at higher frequencies and compatibility with diverse ink types, thereby enhancing production responsiveness and reducing costs.
Implementation Method 1
each having a piezoelectric actuator element and a nozzle, the piezoelectric actuator element being operable to cause the release, in an ejection direction, of fluid droplets through the nozzle in response to electrical signals
Data Source
AI summary
An actuator component for a droplet ejection head; wherein said actuator component comprises a substrate and one or more strips of piezoelectric material fixedly attached to said substrate; wherein said one or more strips of piezoelectric material comprise one or more layers of piezoelectric material, and an array of fluid chambers defined within said one or more strips of piezoelectric material and extending in an array direction; wherein said actuator component further comprises one or more cover parts; wherein the or each cover part extends in said array direction and is fixedly attached to at least one of a side face of one of said strips of piezoelectric material and/or at least a portion of said substrate; and wherein said one or more cover parts comprise a plurality of openings so as to enable fluid to be supplied to selected ones of said fluid chambers through said openings. Associated methods of manufacturing an actuator component for a droplet ejection head are also provided.