Liquid Jet Head Nozzle Partitioning for Stable Ejection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid jet heads face challenges in achieving stable ejection at high resolution due to liquid stagnation and interference between nozzles, requiring advanced drive voltage control.
Innovation Solution
A liquid jet head design featuring a piezoelectric plate with alternating ejection and non-ejection grooves, separated by partition walls, and a staggered nozzle arrangement, which prevents liquid accumulation and allows for independent control of each nozzle, reducing clogging and wave interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If two ejection holes are provided in one deep groove to increase resolution, then recording density is improved, but liquid may be ejected from the wrong nozzle and stable ejection cannot be performed
Solution Approach 1:
The invention divides the single deep groove structure into multiple independent deep grooves, each containing one ejection hole. Partition walls separate these grooves to prevent liquid flow interference between adjacent nozzles, enabling each nozzle to eject liquid independently and stably while maintaining high recording density.
Solution Approach 2:
Partition walls are introduced as intermediary structures between adjacent deep grooves. These partition walls act as barriers that prevent liquid from one groove from entering adjacent grooves, thereby eliminating the harmful liquid flow interference that occurs when multiple ejection holes share a single groove.
2Stability of the object's composition
If deep grooves are used for liquid circulation, then liquid stagnation is prevented, but pressure waves affect adjacent grooves causing wave overlapping
Solution Approach 1:
The invention segments the liquid circulation system by providing separate deep grooves for each nozzle, isolated by partition walls. This segmentation allows each groove to maintain independent liquid circulation, preventing pressure waves from one groove from affecting adjacent grooves and eliminating wave overlapping.
Solution Approach 2:
Each deep groove is made independently controllable through partition wall separation, allowing individual drive voltage application to each groove. This enables precise control of liquid ejection from each nozzle without interference from adjacent nozzles, even when liquid circulation is maintained in all grooves.
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 stable and high-resolution liquid ejection without the need for advanced drive voltage control, minimizing nozzle clogging and improving recording density and speed.
Implementation Method 1
a piezoelectric plate including a plurality of first ejection grooves communicating to the plurality of nozzles of the first nozzle row, and a plurality of second ejection grooves communicating to the plurality of nozzles of the second nozzle row
Data Source
AI summary
A liquid jet head includes a nozzle plate having a first nozzle row and a second nozzle row each formed of a plurality of nozzles; and a piezoelectric plate having a plurality of first ejection grooves communicating with respective ones of the plurality of nozzles of the first nozzle row, and a plurality of second ejection grooves communicating with respective ones of the plurality of nozzles of the second nozzle row. The plurality of first ejection grooves and the plurality of second ejection grooves are longitudinally separated from each other in the longitudinal direction of the grooves by a partition wall located between the plurality of first ejection grooves and the plurality of second ejection grooves.