• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2022, Vol. 58 ›› Issue (23): 262-270.doi: 10.3901/JME.2022.23.262

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Construction and Application of 3D Printer with Solenoid Valve Micro-jet Function

SANG Shengbo1, SHEN Zhizhong1, ZHOU Chuangang1,2, SUN Lei1, QUAN Long3   

  1. 1. Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception, Taiyuan University of Technology, Taiyuan 030024;
    2. Shanxi Institute of 6D Artificial Intelligence Biomedical Science, Taiyuan 030031;
    3. College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024
  • Received:2022-03-07 Revised:2022-07-22 Online:2022-12-05 Published:2023-02-08

Abstract: 3D printing technology has been widely used in biomedicine, sensor manufacture and other fields. However, traditional 3D printers have a different application range due to their distinct working modes. It is difficult to be compatible with biological preparation and sensor preparation at the same time. Therefore, using the solenoid valve as the nozzle, a 3D printer with a unique working mode is independently designed and constructed, and the high-precision droplet distribution mode is applied to the printing of 3D structures. The effects of cylinder pressure, solenoid valve switching time and nozzle height on the print droplet diameter are studied, and the print quality of point, line, net and surface patterns is evaluated. The tissue-engineered skin with dermal papilla structure and an array flexible pressure sensor are prepared by the printer, and the cell activity of the tissue-engineered skin and the pressure-resistance conversion characteristics of the pressure sensor are tested. The results show that the diameter of droplets is positively correlated with cylinder pressure, nozzle opening time and nozzle height. The printing effect of 3D printer on point, line, net and surface patterns is ideal. It can be applied to the preparation of tissue-engineered skin with dermal papilla and flexible pressure sensor, respectively. The 3D printer combines the advantages of inkjet printer and extrusion printer, has good compatibility with printing ink, has the advantages of simple printing mode, fast printing speed and high forming quality, is of great significance to the research of tissue-engineered skin and flexible pressure sensor, and lays a foundation for the preparation of bionic skin with sensing function.

Key words: 3D printer, solenoid valve nozzle, tissue-engineered skin, flexible pressure sensor

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