电场驱动喷射高粘度导电材料的3D打印机理研究
首发时间:2017-09-12
摘要:高粘度导电材料3D打印是嵌入式封装电子产品生产制造中重要工艺之一。高粘度导电材料的3D打印机理复杂,影响因素和工艺参数较多。本文通过理论分析与实验验证相结合的方法,揭示了喷嘴结构与电场对流体流速与液滴形态的影响,最终得出相同气压下,喷嘴尖端处越短,截面收缩越大,液体流速越快;电场使液滴收缩形成泰勒锥,并影响液体流速;喷嘴内径一定时,对打印结果影响最大的因素是气压压强与平台移动速度,在一定气压与电压范围内,打印均能实现,通过调整平台移动速度,打印不同线宽、形貌导线。研究成果对改善高粘度导电材料的3D打印形貌、成型精度和可控性提供了理论基础和方向指导。
关键词: 机械制造工艺与设备 电场驱动喷射3D打印 高粘度导电材料 喷嘴结构 喷射机理 影响规律
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Study on the 3D printing mechanism of high - viscosity conductive materials
Abstract:3D printing technology of high viscosity conductive material is an important printing process that accompanies the development of embedded encapsulated electronic products, which is the most important process in the production and manufacture of embedded encapsulated electronic products. The 3D printing mechanism of high viscosity conductive materials is complicated, and the influencing factors and technological parameters are more. In this paper, through theoretical analysis and experimental verification, the method of the combination of the nozzle structure and the influence of electric field of fluid velocity and liquid droplets form, finally it is concluded that under the same pressure, the shorter, the nozzle tip section shrinkage is larger, the faster the liquid flow rate; In addition to the effect of the shrinkage of the electric field to the droplets forming the Taylor cone, the liStudy of 3D printer for high viscosity conductive material driven by electric fieldquid velocity can be affected. When the internal diameter of the nozzle is certain, the main factor influencing the printing results is the pressure and the velocity of the platform. In the range of pressure and voltage, printing can be achieved. By adjusting the moving speed of the platform, it can print different lines and wide and topographic wires. The research results provide a theoretical basis and direction for improving the 3D printing appearance, forming accuracy and controllability of high viscosity conductive materials.
Keywords: machinery manufacturing process and equipment electric field driven jet 3D printing high viscosity conductive material nozzle structure jetting mechanism influence rule
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