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Micro-nano sticky powder micro stable conveying device and method

A conveying device, micro-nano technology, applied in the direction of conveyors, vibrating conveyors, transportation and packaging, etc., can solve the problems of blocked nozzles, increased compactness, unstable conveying process, etc., to achieve the elimination of clogging, stable conveying process, high precision effect

Active Publication Date: 2018-03-27
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large viscous force between the particles and the friction between the powder and the inner wall of the capillary during the transportation of the micro-nano scale powder, the density of the powder increases during the micro-transportation process, which blocks the nozzle, so the transportation The process is unstable, and the conveying accuracy is difficult to control

Method used

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  • Micro-nano sticky powder micro stable conveying device and method
  • Micro-nano sticky powder micro stable conveying device and method
  • Micro-nano sticky powder micro stable conveying device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 As shown, the micro-nano viscous powder micro-stable delivery device of this embodiment includes pulse inertial force drive devices 1-7, ultrasonic standing wave field generators 9-12, conical micro-nozzles 8 and microscopic camera systems 13-14 . Compared with the ultrasonic vibration micro-powder feeding device, it eliminates the clogging phenomenon of powder in the micro-nozzle, and has the advantages of stable delivery process and high precision.

[0021] The impulse inertia force driving device includes a frame 1, a stacked piezoelectric ceramic driver 3, a piezoelectric driving signal source 5, a power amplifier 5, A connector 2 and B connector 4, and fastening bolts 7, etc. The upper end surface of the stacked piezoelectric ceramic driver 3 is fixedly connected with the frame 1 through the A connector 2 . The lower end surface of the stacked piezoelectric ceramic driver 3 is fixedly connected to the conical micro-nozzle 8 through the B connecto...

Embodiment 2

[0027] The difference between this embodiment and Embodiment 1 is that the distance between the sound source and the reflection end is 2 times or more than the half wavelength of the sound wave of a certain frequency, and the outlet part of the micro nozzle still needs to be placed on the standing wave node, and the different effects produced are , under the same conditions, the micro-transportation ability of the powder will be slightly reduced due to the decrease of the acoustic radiation force. Other structures and delivery methods refer to embodiment 1

Embodiment 3

[0029] A connecting piece 2 rotates along the frame 1 at a certain angle so that the micro-nozzle forms an angle of 0-45° downward with the vertical direction, which can also improve the conveying accuracy and stability to a certain extent. Refer to Example 1 for other structures and delivery methods.

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Abstract

The invention discloses a micro-nano sticky powder micro stable conveying device which comprises a pulse inertia force actuating device, an acoustic standing wave field generating device, a micro nozzle and a microscope camera system. The pulse inertia force actuating device comprises a rack, a stack piezo-ceramic actuator and a piezoelectric actuation signal source. The acoustic standing wave field generating device comprises an ultrasonic power supply, an ultrasonic transducer, an amplitude-change pole and an acoustic wave reflection end. The pulse inertia force actuating device generates pulse inertia force in powder, and enables the powder to move towards an outlet of the nozzle along the axis of the micro nozzle; and the acoustic standing wave field generating device generates stableacoustic standing wave fields at an acoustic source and the acoustic wave reflection end and places the outlet portion of the micro nozzle and the powder in the micro nozzle in the standing wave fieldnode positions, and the powder in the outlet position of the micro nozzle is in a suspension state under the effect of acoustic radiation force and is disengaged from the above dense powder and the inner wall of the micro nozzle. By adopting the micro-nano sticky powder micro stable conveying device, the phenomenon that the powder is clogged in the micro nozzle is eliminated, and the device has the advantages that the conveying process is stable, and the precision is high.

Description

technical field [0001] The invention relates to a micro-nano viscous powder micro-stabilized delivery device and method. Background technique [0002] The high-precision and stable micro-transportation of micro-nano-scale powders is a key technology in the fields of 3D printing and high-efficiency API (HPAPI) research and preparation. In terms of large amount of powder conveying, there are many powder conveying methods such as pneumatic conveying, air-carrying coaxial conveying and ultrasonic vibration powder conveying. Pneumatic powder conveying and coaxial powder conveying are only suitable for large quantities of powder. For macroscopic delivery, it is difficult to achieve micro delivery below 100mg / s. Ultrasonic vibration micro-powder feeding device uses high-frequency mechanical vibration (usually tens of kHz) generated by ultrasound to make the powder flow out of the capillary nozzle. However, due to the large viscous force between the particles and the friction betw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65G27/16
CPCB65G27/16
Inventor 王洪成吴立群赵苗苗陈让让张俐楠
Owner HANGZHOU DIANZI UNIV
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