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Piezoelectric ejector of biological 3D printer and working method of piezoelectric ejector

A 3D printer and working method technology, applied in 3D object support structures, manufacturing tools, additive processing, etc., can solve the problems of high viscosity value of biological materials, inability to eject biological materials, etc., to reduce flow resistance, improve ejection ability, The effect of reducing pressure loss

Inactive Publication Date: 2018-07-24
MEDPRIN REGENERATIVE MEDICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because the viscosity value of biological materials is relatively large, ordinary industrial piezoelectric nozzles cannot spray biological materials with a viscosity value exceeding 20cps

Method used

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  • Piezoelectric ejector of biological 3D printer and working method of piezoelectric ejector
  • Piezoelectric ejector of biological 3D printer and working method of piezoelectric ejector
  • Piezoelectric ejector of biological 3D printer and working method of piezoelectric ejector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figure 1 to Figure 3As shown, a piezoelectric nozzle of a biological 3D printer, which includes a nozzle body 1, a nozzle inner cavity 11 is provided inside the nozzle body 1, a nozzle gland 2 is provided on the top of the nozzle body 1, and a nozzle gland 2 is provided on the nozzle body 1. A piezoelectric drive device 3 is provided between the main body 1 and the nozzle gland 2. The bottom of the nozzle body 1 is detachably connected with a nozzle assembly that communicates with the inner cavity 11 of the nozzle. The side wall of the nozzle body 1 is provided with There is a feed hole 4 communicating with the inner chamber 11 of the nozzle, the inner chamber 11 of the nozzle is in an inverted cone shape, and the convergence angle α of the longitudinal section of the inner chamber 11 of the nozzle is between 60° and 90°, so The flow path inside the nozzle assembly is streamlined, and the end of the feed hole 4 close to the inner cavity 11 of the spray head is ...

Embodiment 2

[0039] A working method of a piezoelectric nozzle of a biological 3D printer, which comprises the following steps:

[0040] S1. Turn on the power of the biological 3D printer, so that the piezoelectric nozzle is in the standby state;

[0041] S2. Inject liquid printing material into the nozzle cavity 11 inside the nozzle body 1 through the feed hole 4;

[0042] S3. After the nozzle inner cavity 11 is filled with liquid printing material, apply a driving waveform signal to the piezoelectric driving device 3;

[0043] S4. Driven by the driving waveform signal, the piezoelectric driving device 3 deforms in a positive direction to generate a positive injection pressure, and the injection pressure pushes the liquid printing material in the inner cavity 11 of the nozzle to flow downward and protrude from the end of the nozzle 5;

[0044] S5. Driven by the drive waveform signal, the piezoelectric drive device 3 retracts, the pressure in the nozzle inner cavity 11 drops and pulls the...

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Abstract

The invention provides a piezoelectric ejector of a biological 3D printer. The piezoelectric ejector of the biological 3D printer comprises an ejector main body, wherein an ejector inner cavity is formed inside the ejector main body; an ejector gland is arranged at the top of the ejector main body; a piezoelectric driving device is arranged between the ejector main body and the ejector gland; thebottom of the ejector main body is detachably connected with a nozzle component communicated with the ejector inner cavity; a feeding hole communicated with the ejector inner cavity is formed in the side wall of the ejector main body; the ejector inner cavity takes the shape of an inverted cone shape; a streamline shaped channel is formed inside the nozzle component; a throttle hole is formed in one end close to the ejector inner cavity, of the feeding hole. The invention further provides a working method of the piezoelectric ejector of the biological 3D printer. By adopting the piezoelectricejector provided by the invention, the flow resistance of a liquid printing material can be reduced, energy loss can be reduced, the ejection capability of a nozzle can be improved, the piezoelectricejector is adopted for printing of a biological material with relatively high viscosity, and the problems of nozzle blocking and bubbles can be effectively prevented.

Description

technical field [0001] The present invention relates to the technical field of 3D printing equipment, and more specifically, to a piezoelectric nozzle of a biological 3D printer and a working method thereof. Background technique [0002] Piezoelectric injection is a technology that uses the inverse piezoelectric principle of piezoelectric materials to convert electrical energy into mechanical energy and change the pressure in the nozzle cavity to form droplets at the nozzle. Piezoelectric injection can be divided into continuous injection and There are two types of on-demand spraying. Continuous spraying refers to a spraying technology that continuously generates micro-droplets at the front end of the nozzle and uses the deflection electric field and recovery device at the back end to extract and discard specific droplets. The on-demand injection technology is to realize the on-demand injection of the nozzle according to the on-off of the specific control signal. Common pie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/209B29C64/112B33Y30/00B33Y10/00
CPCB33Y30/00B33Y10/00
Inventor 张传杰邓坤学唐学文肖芳煌陈瑞钟怀秋袁玉宇
Owner MEDPRIN REGENERATIVE MEDICAL TECH