Study of photo-polymerization in laser projection imaging method

• Main Authors: Yu-jin Shih, 施宇晉
• Other Authors: Jehn_ming Lin
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/75186464661206683689

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 96 === The laser assisted photo-polymerization technique and the heat transfer analysis of the laser projection imaging process for manufacturing high-aspect-ratio micro-parts have been investigated in this research. Numerical analysis and experimental observation have been applied to study the photo-polymerization with various laser powers and radiation times. In the experiment, a UV lamp (wavelength of 365 nm) has been used to exposure UV resin to form macro photo-polymerization parts. Furthermore a scanning Nd-YAG laser has been applied to build acrylic (PMMA) masks and a pulsed UV excimer laser, through the mask, has been focused on the UV resin to form the micro photo-polymerization parts. In the theoretical analysis, a computational fluid dynamics software has been used to solve the unsteady photo-polymerization model for a continuous curing process. Alternatively a program with FORTRAN code has been developed to analysis the process for the short pulse laser radiation. The results show a good agreement between the numerical analysis and the experiments of the curing dimensions. This research confirms the feasibility of the laser projection imaging technique with the photo-polymerization on UV resin in micro-part formation.