Fluid Ejection Module Mounting with Precision Adjustment
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Solution Overview
Problem
Existing fluid ejection module mounting systems face challenges in achieving precise alignment and easy replacement of multiple printheads in inkjet printers, leading to potential misalignment and reduced printing accuracy.
Innovation Solution
A mounting apparatus with a module mount and clamp assembly that includes precision surfaces for x, y, and θz adjustments, a θz adjustment mechanism with a differential screw, and a cam assembly for x-direction adjustments, along with a spring-loaded clamp system for secure yet consistent clamping, facilitated by an alignment jig for simultaneous alignment of multiple modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple printheads are mounted using conventional mounting systems, then the quantity of printheads increases, but alignment precision deteriorates leading to printing accuracy issues
Solution Approach 1:
The mounting system is segmented into modular components: a standardized mount structure with precision alignment features, individual printhead holders with adjustable positioning mechanisms, and separate clamping assemblies. This segmentation allows each printhead to be independently positioned and aligned while maintaining consistent precision across multiple modules.
Solution Approach 2:
A precision alignment intermediary structure is introduced between the mounting base and the printheads. This intermediary includes machined reference surfaces, alignment pins, and adjustable positioning elements that mediate the connection, ensuring consistent alignment precision regardless of the number of printheads mounted.
2Device complexity
If conventional mounting systems are used for printheads, then the device complexity is reduced, but alignment precision and consistency deteriorate
Solution Approach 1:
Alignment features and reference surfaces are pre-established in the mounting structure before printhead installation. Precision-machined alignment pins, reference planes, and positioning slots are built into the mount base in advance, eliminating the need for complex alignment procedures during assembly while ensuring consistent precision.
3Stability of the object's composition
If printheads are firmly fixed using rigid mounting systems, then alignment stability is improved, but ease of replacement deteriorates
Solution Approach 1:
The mounting system incorporates dynamic clamping mechanisms that can transition between a locked state for stable operation and an unlocked state for easy replacement. Spring-loaded clamps or cam-actuated locking mechanisms allow the printhead to be firmly secured during printing while enabling quick removal and replacement without tools.
4Manufacturing precision
If adjustment mechanisms are added to improve alignment precision, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The mounting system incorporates self-aligning features such as tapered定位 surfaces, spring-loaded positioning elements, and automatic clamping mechanisms that achieve precise alignment without requiring complex external adjustment mechanisms. The system self-adjusts during assembly to ensure proper positioning.
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
Enables precise alignment and easy replacement of fluid ejection modules, ensuring high printing accuracy and reducing alignment errors, with repeatable results across multiple print bars and consistent clamping force.
Implementation Method 1
The θz adjustment mechanism can include a differential screw being configured to move 50 microns or less per revolution
Implementation Method 2
The x adjustment mechanism can include a cam assembly including a cam that is sloped to an angle, α
Implementation Method 3
The clamp assembly can include a spring
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A fluid ejection module mounting apparatus, including a module mount having a horizontal portion and a vertical portion, a fluid ejection module mounted to the module mount, and a clamp assembly including a recessed portion, a clamp along a wall of the recessed portion, and a lever coupled to the clamp and configured to move the clamp from an open position to a closed position. The horizontal portion has an opening configured to receive a fluid ejection module and the vertical portion has a protruding portion. The protruding portion of the module mount is configured to mate with the recessed portion of the clamp assembly.