Orifice Plate Dummy Pressed Points for Nozzle Alignment
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Solution Overview
Problem
Ink-jet recording heads face challenges in achieving high-quality image output due to variations in the landing positions of liquid droplets caused by oblique nozzle holes, which are difficult to miniaturize and require high accuracy in orifice plate formation.
Innovation Solution
The orifice plate features a nozzle hole row with dummy pressed points formed on both ends by precision press working, ensuring uniform opening directions of nozzle holes, thereby maintaining vertical alignment and reducing positional variations of discharged droplets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the nozzle hole intervals are reduced to increase nozzle mounding density, then miniaturization of the ink-jet recording head is achieved, but variations in opening directions of nozzle holes increase causing droplet landing position variations
Solution Approach 1:
Dummy pressed points are formed in advance at both ends of the nozzle hole row during the press working process. These preliminary structural features constrain the plate during nozzle hole formation, ensuring uniform opening directions even when nozzle holes are densely packed, thereby preventing droplet landing position variations while enabling head miniaturization.
2Volume of moving object
If the distances among nozzle hole rows are reduced, then miniaturization of the ink-jet recording head is achieved, but variations in opening directions of nozzle holes increase causing droplet landing position variations
Solution Approach 1:
Dummy pressed points are formed in advance at both ends of the nozzle hole row during the press working process. These preliminary structural features constrain the plate during nozzle hole formation, ensuring uniform opening directions even when nozzle holes are densely packed, thereby preventing droplet landing position variations while enabling head miniaturization.
3Manufacturing precision
If high accuracy in orifice plate formation is required to reduce droplet landing position variations, then manufacturing complexity and cost increase
Solution Approach 1:
Dummy pressed points are formed in advance at both ends of the nozzle hole row during the press working process. These preliminary structural features constrain the plate during nozzle hole formation, ensuring uniform opening directions even when nozzle holes are densely packed, thereby preventing droplet landing position variations while enabling head miniaturization.
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
This configuration allows for accurate and consistent landing of liquid droplets on the to-be-landed-on member, enhancing operational reliability and image quality by maintaining vertical nozzle hole orientations, even in densely packed nozzle arrangements.
Implementation Method 1
a plurality of nozzle holes is formed in a row by press working
Data Source
AI summary
A liquid droplet discharge head includes an orifice plate that has a nozzle hole row in which a plurality of nozzle holes is formed in a row by press working. Liquid droplets are discharged to a to-be-landed-on member from the nozzle holes and land on the to-be-landed-on member, and a plurality of dummy pressed points for making uniform opening directions of the nozzle holes is formed on both of end sides of the nozzle hole row in the orifice plate.