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Liquid injection type micro point fog spraying device

A technology of liquid injection and liquid input, applied in the direction of liquid injection device, injection device, etc., to achieve the effects of superior ease of cleaning, simplified development, and superior start and stop characteristics

Inactive Publication Date: 2013-09-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, the question left to us here is how to solve the start and stop problem of dispensing on the premise of maintaining the various advantages of the "bubble injection type micro-dot, fog double spray device", that is, to improve the device's rapid start-up and shutdown capabilities, and at the same time Reduce the difficulty of cleaning

Method used

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  • Liquid injection type micro point fog spraying device
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  • Liquid injection type micro point fog spraying device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] see figure 1 with figure 2 , the liquid injection type micro-spray spray device includes a precise liquid input device 7, a gas delivery device 6, a gas delivery conduit 1, a nozzle and a liquid delivery conduit 5, and is characterized in that the gas delivery conduit 1 is composed of an inlet constriction section connected to a pipe section of equal cross-section , and access the infusion conduit 5 at the center or wall of its inlet constriction section; the nozzle is composed of a built-in nozzle 4 surrounded by an external nozzle 2, and the built-in nozzle 4 is set on the air conduit 1 The end of the equal-section pipe section; the inlet constriction section of the gas delivery conduit 1 is connected to the gas delivery device 6 , and the infusion conduit 5 is connected to the precise liquid input device 7 .

[0045]

Embodiment 2

[0047] This embodiment is basically the same as Embodiment 1, and the special features are:

[0048] The external nozzle 2 and the built-in nozzle 4 are connected with a detachable structure or the built-in nozzle 4 is replaced with a corresponding paint layer; or the downstream part of the equal-section pipe section of the gas delivery conduit 1 is completely removed.

[0049] The equal-section pipe section of the gas delivery conduit 1, the inner diameter of the infusion conduit 5 and the built-in nozzle 4 are all on the order of millimeters or less; The section and its downstream form a blocked flow. As the working medium, the gas can drive the liquid jet to break and move, and at the same time, it can be used to clean the pipeline.

[0050] The precise liquid input device 7 can provide continuous or pulsed or intermittent irregular liquid input, and its precision is controlled at the level of microliter or below, so as to provide high-frequency multi-point or single-point...

Embodiment 3

[0054] see figure 1 , The liquid injection micro-spray spraying device is composed of a precise liquid input device 7, a gas delivery device 6, an air delivery conduit 1, an external nozzle 2, a built-in nozzle 4 and an infusion conduit 5. The precise liquid input device 7 and the gas delivery device 6 provide stable viscous liquid and gas supply respectively, the gas directly enters the gas delivery conduit 1, and the liquid enters the gas delivery conduit 1 through the infusion conduit 5; the gas delivery conduit 1 is connected to the built-in nozzle 4 downstream The built-in nozzle 4 is covered with an external nozzle 2, and the liquid plug separated by air bubbles in the gas delivery conduit 1 sprays to the target substrate 3 through the built-in nozzle 4 and the external nozzle 2 to realize the spraying process.

[0055] see figure 2 , the simulation diagram of the central liquid injection pipeline, and the dimensions are as indicated in the label. The media are air an...

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Abstract

The invention relates to a liquid injection type micro point fog spraying device. The device comprises a precise liquid feeding device, a gas feeding device, a liquid infusing conduit and a nozzle, wherein gas serving as a driving medium and conveyed by the gas feeding device is connected by the liquid infusing conduit; the liquid infusing conduit is arranged on a retraction section; the precise liquid feeding device provides continuous, pulse or discontinuous liquid; the liquid infusing conduit injects the controlled liquid conveyed by the precise liquid feeding device from the retraction section of the liquid infusing conduit or the liquid infusing conduit side wall on the upstream of the liquid infusing conduit or the central position of the liquid infusing conduit; the liquid infusing conduit is connected with a pipe section with equal cross section at the downstream end part of the retraction section; and the nozzle is positioned on the end part of the pipe section with equal cross section of the liquid infusing conduit. The device is applicable to a liquid ejection and injection process of powder metallurgy, ink jet, spraying, glue spraying, welding, quick molding and the like. The instability mechanism of micro ejection fluidity in a micro pipe and the characteristics of periodicity and controllability of liquid drop formation are used by the device, so that high-frequency and high-precision point spraying and fog spraying effects are guaranteed.

Description

technical field [0001] The invention relates to a liquid injection type micro-spray spraying device. It can produce high-frequency, high-precision and controllable liquid point spray and atomized spray effects. It can be widely used in various liquid jet injection processes such as powder metallurgy, inkjet, spray coating, composite material preparation, biomedicine, semiconductor thin film preparation, rapid prototyping, glue spraying, welding and combustion. The work of the present invention has been partially funded by the National Natural Science Foundation of China (CNSF11172163). Background technique [0002] This invention originates from the research on jet atomization metallurgy technology and glue distribution technology in semiconductor packaging industry; it is the dual patent form of the authorized patent "Bubble Injection Micro-dot, Mist Double Spray Device" (Patent No. ZL 2009 1 0048328.Ⅹ) . [0003] Spray atomization metallurgy technology is an emerging me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B7/04B05B7/12
Inventor 王志亮黄凯张金松张建华
Owner SHANGHAI UNIV
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