Finger-shaped cantilever piezoelectric nozzle and its processing method and spraying equipment

A cantilever type and cantilever beam technology, which is applied in the field of piezoelectric ceramics, can solve the problems of deformation of the ink chamber, easy wear and short life of parts such as the ink chamber, and achieve high output force, increased output force, and large deformation.

Active Publication Date: 2018-05-18
TSINGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. The entire piezoelectric ceramic film of the piezoelectric nozzle is bonded to the surface of the ink chamber substrate. When the piezoelectric ceramic film is deformed, it will cause deformation of the entire ink chamber, making the parts such as the ink chamber easy to wear and short in life.

Method used

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  • Finger-shaped cantilever piezoelectric nozzle and its processing method and spraying equipment
  • Finger-shaped cantilever piezoelectric nozzle and its processing method and spraying equipment
  • Finger-shaped cantilever piezoelectric nozzle and its processing method and spraying equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0060] like Figure 9 as shown ( Figure 9 220 is the flexible diaphragm of this embodiment, 250 is the finger-shaped cantilever type piezoelectric ceramic of this embodiment), and the ink tank 210 is a tank body with openings at both ends, wherein:

[0061] One end of the ink tank 210 is used as the ink inlet 230;

[0062] The end surface of the other end of the ink tank 210 is provided with a sealing member 260 , and the bottom of the other end of the ink tank is provided with an ink outlet 270 .

[0063] The finger-shaped cantilever type piezoelectric nozzle of this embodiment is side spraying, and in this embodiment, the ink tank is a tank body with openings at both ends, which can be processed conveniently, and the nozzle is arranged on the nozzle plate. If the nozzle breaks down, Only the nozzle plate needs to be replaced, which is convenient for maintenance.

Embodiment 3

[0065] like Figure 10 as shown ( Figure 10 320 is the flexible diaphragm of this embodiment, 350 is the finger-shaped cantilever type piezoelectric ceramic of this embodiment), and the ink tank 310 is a tank body with openings at both ends, wherein:

[0066] One end of the ink tank 310 is used as the ink inlet 330;

[0067] The nozzles 340 are provided on a nozzle plate 380 that is glued to the end surface of the other end of the ink tank 310 .

[0068] The finger-shaped cantilever piezoelectric nozzle of this embodiment is end-face spraying, and in this embodiment, the ink tank is a tank body with openings at both ends, which can be processed conveniently, and the nozzle is arranged on the nozzle plate. If the nozzle breaks down, Only the nozzle plate needs to be replaced, which is convenient for maintenance.

Embodiment 4

[0070] like Figure 11 as shown ( Figure 11 Among them, 420 is the flexible diaphragm of this embodiment, 450 is the finger-shaped cantilever piezoelectric ceramic of this embodiment), and the ink tank 410 is a tank body with one end closed and one end open, wherein:

[0071] One end of the opening of the ink tank 410 is used as the ink inlet 430;

[0072] A small hole is opened on the end surface or the bottom surface of the closed end of the ink tank 410 as the nozzle 440 .

[0073] The finger-shaped cantilever piezoelectric nozzle in this embodiment is end-face spraying, and in this embodiment, the nozzle is directly arranged on the end face of the closed end of the ink tank, which makes the structure simpler and the processing more convenient.

[0074] There are many ways to process the ink tank and finger-shaped cantilever piezoelectric ceramics in the above-mentioned embodiments, and an embodiment is given here:

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PUM

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Abstract

The invention discloses a finger-like cantilever type piezoelectric spray head, a machining method thereof and spraying equipment, and belongs to the field of piezoelectric ceramic. The finger-like cantilever type piezoelectric spray head comprises at least one ink tanks, the ink tanks are covered with a flexible membrane, and ink cavities are formed; one end of each ink cavity is provided with an ink inlet, and the other end of the ink cavity is provided with a nozzle; the flexible membrane is provided with finger-like cantilever type piezoelectric ceramic; the finger-like cantilever type piezoelectric ceramic comprises a connection base plate and a plurality of piezoelectric ceramic cantilever beams which stretch out from the side face of the connection base plate and adopt a mode of D31-mode in-plane transverse bending deformation; and the piezoelectric ceramic cantilever beams are located above the ink cavities, correspond to the ink cavities one to one and are connected with a driving circuit. According to the finger-like cantilever type piezoelectric spray head, the machining method thereof and the spraying equipment, the structure is simple, machining is convenient, the output force is high, the application range is wide, abrasion is not prone to occurring, and the life is long.

Description

technical field [0001] The invention relates to the field of piezoelectric ceramics, in particular to a finger-shaped cantilever piezoelectric nozzle, a processing method thereof, and a spraying equipment including the nozzle. Background technique [0002] The nozzle is the core part of the inkjet printer or dispensing machine, which accounts for the highest cost and the highest technical content. It is blank in China from research and development to manufacturing, and it is completely dependent on imports. [0003] Take the Epson inkjet head as an example, such as figure 1 and figure 2 As shown, it includes an ink chamber 1', a vibrating plate 2', a nozzle 3', a piezoelectric film 4' and an upper electrode 5' and a lower electrode 6' connecting the upper surface and the lower surface of the piezoelectric film 4'. When the electric thin film 4' is electrified, it deforms and squeezes the vibrating plate 2', causing the vibrating plate 2' to displace to the inside of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/045
Inventor 褚祥诚仲作金高书宁
Owner TSINGHUA UNIV
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