Jetting device and method for micro molten metal drops

A spray device and metal technology, applied to metal micro-droplet spray devices and fields, can solve problems such as low efficiency, and achieve the effect of reducing unstable conditions in the spray process or replacing nozzles for multiple disassembly and assembly

Active Publication Date: 2014-05-14
湖南哈工机器人研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this device can only produce on-demand micro-droplets, and the efficiency is low

Method used

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  • Jetting device and method for micro molten metal drops
  • Jetting device and method for micro molten metal drops
  • Jetting device and method for micro molten metal drops

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: On-demand metal droplet injection

[0031] When using the device of the present invention to spray molten solder metal 25 (such as tin-lead alloys, tin-silver-copper alloys, etc.) The gas passes into the crucible 11 and the atomization chamber 18 to blow out the original air and reduce the oxygen content inside the crucible 11 and the atomization chamber 18 .

[0032] When using the device of the present invention to spray molten solder metal (such as tin-lead alloy, tin-silver-copper alloy, etc.) droplets, first set the temperature of the heating element 13 on the temperature controller 14 at 40 degrees Celsius above the melting point to heat and melt the solder metal And keep it for a period of time so that the molten metal 25 in the crucible 11 is completely melted and reaches a stable temperature, adjust the micro-pressure regulating valve 8 to make a micro-pressure difference between the interior of the crucible 11 and the atomization chamber 18, so t...

Embodiment 2

[0033] Embodiment 2: continuous metal micro-molten droplet jetting

[0034] When using the device of the present invention to spray molten solder metal 25 (such as tin-lead alloys, tin-silver-copper alloys, etc.) The gas passes into the crucible 11 and the atomization chamber 18 to blow out the original air and reduce the oxygen content inside the crucible 11 and the atomization chamber 18 .

[0035] When using the device of the present invention to spray molten solder metal 25 (such as tin-lead alloys, tin-silver-copper alloys, etc.) droplets, first set the temperature of the heating element 13 on the temperature controller 14 at 40 degrees Celsius above the melting point, and heat the solder metal Melt and keep it for a period of time to completely melt the molten metal 25 in the crucible 11 and reach a stable temperature. Through the inert gas source 6, the pressure reducing valve 7 and the micro-pressure regulating valve 8, the inside of the crucible 11 and the atomization...

Embodiment 3

[0036] Example 3: Nozzle cleaning.

[0037] When the nozzle is clogged and the micro-droplets cannot be ejected, the virtual instrument 20 is used to generate a continuous signal of a sinusoidal waveform with a frequency greater than 16KHz, which is amplified by the power amplifier 19 to drive the piezoelectric ceramic transducer 2, and the high-frequency and large-amplitude vibration makes the nozzle area The molten metal 25 produces ultrasonic cavitation phenomenon, and the micro-pressure regulating valve 8 is adjusted to generate a pressure difference between the inside of the crucible 11 and the atomization chamber 18, so that the impurities attached to the nozzles can be cleaned out, and the purpose of cleaning the clogged nozzles is realized, thereby reducing nozzle clogging The resulting injection process is unstable.

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PUM

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Abstract

The invention discloses a jetting device and method for micro molten metal drops. The device comprises a driving signal waveform generating device virtual instrument, a piezoelectric ceramic transducer, a crucible, heating elements and a micro-pressure adjustment valve and further comprises a vibration rod end which is replaceable and cylindrical and has conical surface transition, a vibration rod middle which is replaceable, a heat isolation protective cover and a conical surface crucible heating base. The bottom of the crucible and the installation position of a spray nozzle are matched with the vibration rod end, an inner diameter is adopted for forming a jetting containing cavity which is changeable in volume, and a large inner diameter is adopted for the upper portion of the crucible, so that the crucible is used for storing more molten metal, and the liquid level does not change tremendously; a gradual change structure is adopted for the vibration rod end, when corresponding to molten metal different in physical property, vibration rod ends different in diameter size can be replaced to precisely adjust the jetting structural size to be adaptive to molten bodies, and the micro molten drops are jet as needed under the action of driving signals as needed.

Description

technical field [0001] The invention belongs to the technical field of metal droplet jet printing, and relates to a metal droplet jetting device and method. Background technique [0002] Metal micro-droplet jet printing technology uses micro-droplet jetting device to make the molten metal in the melting crucible spray out from the nozzle to form a continuous micro-spherical droplet stream with uniform size or a single micro-spherical droplet on demand. It is used for the generation of trace metal materials, the production of microspheres and its deposition molding. It has the advantages of simple process, easy control, and low cost. It has broad application prospects in the fields of rapid prototyping of metal prototypes, integrated circuit microelectronic packaging interconnection bump printing, etc. [0003] In the prior art, there is an on-demand metal droplet spraying device. Its working principle is: the volume of the cavity formed by the end of the vibrating rod, the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/115
Inventor 高胜东姚英学刘荣辉
Owner 湖南哈工机器人研究院有限公司
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