Internal circulation type ink jet head assembly and ink jet head

Abstract

The invention discloses an internal circulation type ink jet head which comprises a PZT driver and two cover plates. The two cover plates are arranged on the two sides of the PZT driver correspondingly. Ink inlets are formed in the cover plates. An ink jet cavity is formed among the PZT driver and the cover plates on the two sides of the PZT driver and is provided with multiple ink ways, the multiple ink ways are communicated, and a nozzle plate is arranged at an outlet of each ink way. The multiple ink ways are communicated to form the internal circulation type ink jet head sharing the ink ways, and the problem of insufficient ink supply is avoided. The invention further provides an internal circulation type ink jet head assembly which comprises multiple internal circulation type ink jetheads. Ink circulates in ink jet cavities of all the ink jet heads, branch ink ways for overlapping the ink jet heads are omitted, the size of the ink jet heads is reduced, the production cost is reduced, meanwhile, the physical resolution of ink-jet printing is increased, and the printing precision is improved.

Description

technical field [0001] The invention relates to the field of inkjet technology, in particular to an internal circulation type inkjet head combination and the inkjet head. Background technique [0002] Inkjet is to spray small black or colored ink droplets onto the paper surface. By using more nozzles and spraying the same area multiple times, most inkjet printers can output medium and high-resolution images. When printing, the nozzle keeps a certain distance from the surface of the support, so it is also called non-contact printing. There are two main technologies used in inkjet printers: continuous inkjet technology and random inkjet technology. The continuous inkjet technology is represented by the charge modulation type. The principle of this inkjet printing is to use a piezoelectric drive device to apply a fixed pressure to the ink in the nozzle to make it spray continuously. [0003] The circuit used in the prior art is that each inkjet head is equipped with a branch ...

AI Technical Summary

Problems solved by technology

[0003] The circuit used in the prior art is that each inkjet head is equipped with a branch ink path, which will cause the volume of the inkjet head to become larger. Since the assembly of the inkjet head is completed under a microscope, the field of view of the microscope is limited. The large assembly area increases the difficulty of assembly, which is not conducive to the assembly and production of inkjet heads; at the same time, under the premise that the assembly of inkjet heads is difficult, it is even more unsuitable to do the superposition of multiple inkjet heads, so that the performance of inkjet print heads cannot be improved. Physical resolution, it is difficult to improve printing accuracy, resulting in inkjet printing quality that cannot meet the requirements of modern society

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