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A piezoelectric inkjet print head

An inkjet print head, piezoelectric technology, applied in printing and other directions, can solve problems such as insufficient ink supply, uneven ink supply, poor printing quality, etc., to reduce pressure loss, reduce pressure crosstalk, and increase nozzle density Effect

Active Publication Date: 2021-09-07
NAT INST CORP OF ADDITIVE MFG XIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a piezoelectric print head to solve the problem of poor printing quality caused by insufficient ink supply or uneven ink supply in traditional piezoelectric inkjet print heads

Method used

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  • A piezoelectric inkjet print head
  • A piezoelectric inkjet print head
  • A piezoelectric inkjet print head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] from figure 2 and image 3 It can be seen that the piezoelectric inkjet printhead in this embodiment includes a main ink channel 112 , a differential pressure channel 117 , a flow limiting channel 113 , a pressure chamber 114 , a transition channel plate 118 , a transition channel 115 , a nozzle plate 119 and nozzles 116 . Ink enters the pressure chamber 114 from the main ink channel 112 through the differential pressure channel 117 and the flow limiting channel 113 , then flows into the nozzle 116 through the transition channel 115 , and then the ink is ejected out. In this embodiment, five differential pressure channels 117 , flow limiting channels 113 and pressure chambers 114 are used for illustration, and the number is not limited in other embodiments.

[0061] The main ink channel 112 is used to provide the flow channel for ink to flow into the pressure chamber, and communicates with each pressure chamber 114 through each pressure difference channel 117 and flow...

Embodiment 2

[0066] from Figure 4a and Figure 4b It can be seen that this embodiment includes two sets of piezoelectric inkjet printing heads symmetrically arranged in Embodiment 1, the nozzles in the two groups of piezoelectric inkjet printing heads are located on the same straight line, and the pressure chambers are evenly distributed between the two nozzles. side, and the pressure chambers on both sides are aligned, which is beneficial to increase the nozzle density of the print head.

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Abstract

The invention belongs to the technical field of droplet jetting printing, and in particular relates to a piezoelectric inkjet printing head, which solves the problem of poor printing quality caused by insufficient ink supply or uneven ink supply in the traditional piezoelectric inkjet printing head. The pressure difference channel is used to connect the main ink channel and each pressure chamber, so that there is a certain hydraulic pressure difference between the main ink channel and each pressure chamber, and the ink is promoted to enter each chamber under the action of hydraulic pressure, ensuring the ink supply of each chamber. Unobstructed and sufficient, effectively improving printing efficiency; and adding a meandering restrictor structure between the pressure chamber and the main ink channel, reducing the liquid backflow in the pressure chamber, reducing the pressure loss in the pressure chamber, improving the jetting performance of the print head, and reducing the pressure at the same time Pressure crosstalk between chambers. At the same time, a transition channel plate is added between the pressure chamber and the nozzle plate, that is, the strength of the nozzle plate is increased. When the piezoelectric ceramic is driven by deformation and the pressure in the pressure chamber increases, the pressure loss in the pressure chamber caused by the deformation of the nozzle plate is reduced, and the print head is improved. Jetting performance.

Description

technical field [0001] The invention belongs to the technical field of droplet jetting printing, and in particular relates to a piezoelectric inkjet printing head. Background technique [0002] Droplet jet printing technology is a printing technology that generates a pressure difference between the ink chamber and the outside world through a certain extrusion method, causing the internal pressure of the nozzle to be greater than the external pressure, and then pushing the ink out of the nozzle to produce tiny ink droplets. Generally speaking, droplet ejection technology can be divided into continuous type and on-demand type, and on-demand type is widely used because of its simple structure, good droplet consistency, and high printing accuracy. [0003] According to the ejection method of ink droplets, inkjet printheads are generally divided into piezoelectric inkjet printheads and thermal bubble inkjet printheads. The piezoelectric inkjet print head uses the deformation of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/14
CPCB41J2/14201B41J2/14233
Inventor 原瑞凝王莉黄菲卢秉恒
Owner NAT INST CORP OF ADDITIVE MFG XIAN
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