Channel Substrate with Parallel Machining Marks for Nozzle Accuracy
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Solution Overview
Problem
There is a demand for higher speed and image quality in image forming apparatuses, particularly for line-type recording heads that require increasing the length and number of nozzles while reducing costs, with existing materials like metal and resin being used but requiring improved production methods to enhance positional accuracy and reduce material costs.
Innovation Solution
A channel substrate with linear machining marks parallel to the direction of individual channels is used in the production of liquid discharge heads, where the machining marks are formed by grinding tools in a direction parallel to the channel array, enhancing positional accuracy and simplifying the production process, and the substrate includes a nozzle plate and channel plate with pressurization chambers and nozzle orifices formed by pressing and grinding steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the length of the recording head is increased to increase the number of nozzles per head, then the productivity and image quality are improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The channel substrate is divided into multiple individual channels that are arrayed in a row, with each channel being independently formed. This segmentation allows the recording head to be extended in length by simply adding more channels in sequence, rather than creating increasingly complex integrated channel structures. Each channel can be manufactured using the same pressing and grinding processes, making the system modular and scalable.
2Manufacturing precision
If conventional machining methods are used for forming channels, then the production process is established, but the positional accuracy of nozzles deteriorates
Solution Approach 1:
The patent replaces conventional mechanical machining methods with a combination of pressing and grinding processes. The pressing process forms the basic channel structure and pressurization chambers, while the grinding process precisely forms the nozzle orifices with high positional accuracy. This substitution of manufacturing methods enables better control over nozzle positions without significantly increasing production complexity.
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 approach simplifies the production process, reduces production costs, and achieves excellent positional accuracy and discharging performance for the liquid discharge head, enabling higher image quality and increased nozzle density without positional deviations.
Implementation Method 1
voltage is applied to a pressure generator, such as a piezoelectric element, to bend (expand and contract) the pressure generator
Implementation Method 2
grinding both the first side and the second side of the channel substrate with a grinding tool in a direction substantially parallel to a direction in which the through holes are arrayed
Data Source
AI summary
A channel substrate includes a plurality of individual channels and a plurality of linear machining marks. The plurality of individual channels is arrayed in row. The plurality of linear machining marks is substantially parallel to a direction in which the plurality of individual channels is arrayed in row.