Piezoelectric array spray head and spraying equipment including the same

Abstract

The invention discloses a piezoelectric array nozzle and spraying equipment comprising the same, and belongs to the field of piezoelectric ceramics. The nozzle comprises a nozzle power part an a nozzle ink part, wherein the nozzle ink part comprises a plurality of sheet-shaped parallel ink-spraying cavities. Each ink-spraying cavity is provided with an ink inlet, an ink outlet, and a spraying nozzle, wherein the spraying nozzle is located on an end face, parallel to the thickness direction, of the ink-spraying cavity. Two side walls, perpendicular to the thickness direction, of each ink-spraying cavity are flexible side walls. The nozzle power part employs a piezoelectric ceramic cantilever beam, wherein one end of the piezoelectric ceramic cantilever beam is fixed and the other end of the piezoelectric ceramic cantilever beam contacts with and drives the flexible side walls. Compared with the prior art, the nozzle provided by the invention is high in physical resolution, and the physical resolution can be adjusted. The nozzle is wide in application range, is simple in structure, and is convenient for maintenance.

Description

Technical field [0001] The invention relates to the field of piezoelectric ceramics, in particular to a piezoelectric array spray head and a spraying equipment including the spray head. Background technique [0002] The nozzle is the core of the inkjet printer or dispenser, the highest cost, and the highest technical component. The domestic research and development to manufacturing are blank, and they are completely dependent on imports. [0003] Take Epson inkjet head as an example, such as figure 1 with figure 2 As shown, it includes ink chamber 1', vibration plate 2', nozzle 3', piezoelectric film 4', and upper electrode 5'and lower electrode 6'connecting the upper and lower surfaces of piezoelectric film 4'. When pressure is applied When the electric film 4'is energized, it deforms and squeezes the vibrating plate 2', causing the vibrating plate 2'to generate displacement into the ink chamber 1', causing the ink to be ejected from the nozzle 3'. [0004] However, this inkjet he...

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Problems solved by technology

[0005] 1. The physical resolution is low; the piezoelectric film is arranged at intervals along the direction of its own width, so that the distance between adjacent nozzles must be greater than the width of the piezoelectric film, because the output force of the piezoelectric film must reach a certain level to make the vibration The plate is deformed, so the width of the piezoelectric film cannot be too narrow, so that the distance between adjacent nozzles cannot be very close, and the physical resolution is not high

[0006] 2. The physical resolution is not adjustable, and the scope of application is narrow; after the ink chamber is processed, the physical resolution of the inkjet head is fixed and cannot be adjusted, and cannot adapt to the work requirements of different occasions (such as inkjet printing, dispensing , spraying glaze or spraying electrode slurry and other different occasions), the scope of application is narrow

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