Development and application on hole-sealing of pL ultra-micro dispenser

Qin ZHANG; Si-lun YE; Kai LUO; Ce XU

doi:10.3788/OPE.20202805.1132

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Development and application on hole-sealing of pL ultra-micro dispenser

Micro/Nano Technology and Fine Mechanics | 更新时间：2020-07-09

- Development and application on hole-sealing of pL ultra-micro dispenser
- Optics and Precision Engineering Vol. 28, Issue 5, Pages: 1132-1139(2020)
- 作者机构：
  
  1.华南理工大学机械与汽车工程学院, 广东广州 510641
  2.中国文昌航天发射场, 海南文昌 571300
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20202805.1132
  CLC： U649.72
- Received：01 November 2019，
  
  Revised：20 January 2020，
  
  Accepted：20 January 2020，
  
  Published：15 May 2020
- 稿件说明：
移动端阅览
Qin ZHANG, Si-lun YE, Kai LUO, et al. Development and application on hole-sealing of pL ultra-micro dispenser[J]. Optics and precision engineering, 2020, 28(5): 1132-1139.
DOI：

Qin ZHANG, Si-lun YE, Kai LUO, et al. Development and application on hole-sealing of pL ultra-micro dispenser[J]. Optics and precision engineering, 2020, 28(5): 1132-1139. DOI： 10.3788/OPE.20202805.1132.

摘要

狭小空间内pL级超微量点胶是胶接技术的难点

针对这个问题

开发了pL级超微量自动点胶笔。基于转印式点胶分液原理

通过移液针穿过装有胶液的玻璃微管

获取胶滴

利用胶滴在点胶面上的转移分离

实现超微量点胶。开发的点胶笔全长仅为65 mm

最小分辨率0.24

m/step

最大行程7 mm

点胶笔通过USB接口连接到上位机上

可以实现对点胶过程的控制。通过大量实验

研究了点胶笔的性能

并将其应用到直径170 mm

长度350 mm小空间密封腔内

直径5~20

m的微孔胶封上。实验结果表明：开发的点胶笔

装夹方便

重复精度高

即适用于覆盖式封孔

也适用于插入式封孔。通过调整点胶笔移液针的种类、尺寸、移动速度和封胶方式

可以在密闭小空间内

压力环境变化的工况下

实现微孔的pL级密封

最小封胶量为4.4 pL

满足工程需要

为小空间内的封胶提供了有效技术途径。

Abstract

Adhesive bonding technology faces challenges regarding achievement of pL-magnitude ultra-micro dispensing in narrow spaces. To address this problem

a pL-magnitude ultra-micro automatic dispenser was designed in this study. The transfer-type sealing method was adopted

and a dispensing needle was driven to traverse through a glass microtube with loading glue; adherence was achieved with a micro-droplet. Subsequently

the micro-droplet could be partly transported to the target surface. The dispenser

which was 65 mm in total length and had a minimum resolution of 0.24

m/step and a maximum stroke of 7 mm

was linked to the upper computer via a USB interface

using which the dispensing process was controlled. An experimental platform was constructed

and a manual micro-positioning platform with a resolution of 10

m was used to load a micro-ball with a micro-hole drilled on its surface. Four CCD microscopes were used to detect the position of the micro-hole and provide visual feedback to the operator. An electronic micro-positioning platform with a resolution of 0.2

m was also employed to hold the dispenser and transport it seamlessly to the correctposition for holesealing. After the hole-sealing process was completed

two optical microscopes were used to measure the size of the glue spot and assess the quality of the holesealing. Many experiments were conducted to study the performance of the dispenser. Subsequently

the dispenser was also used to seal micro-holes of diameters varying from 5 to 20

m in a narrow seal cavity with a diameter of 170 mm and length of 350 mm. Experimental results indicate that the glue dispenser enables excellent repeatability rates and effective covering and insertion for holesealing. When the dispensing needle′s size and typeas well as the moving speed and sealing method are adjusted

it can be used to seal micro-holes with pL-magnitude-volume glue in a narrow space at different pressures. The smallest experimental glue volume was 4.4 pL

which satisfies the requirement and enables effective sealing in a narrow space.

关键词

Keywords

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