Precisely and rapidly mirco-structuring of glass parts by micro injection molding technology

凭借玻璃良好的化学和温度稳定性、光学特性以及生物相容性、消毒能力和易于清洁的可能性，微结构部件被发现并应用于许多领域。然而，现有的玻璃微零件制造技术还不能实现玻璃微零件（尺寸<10-6 m2）的大规模低成本生产。因此，有必要引入一种新的加工方法来提高微玻璃零件的制造成本效率，同时保持高精度（复制精度> 99%）和快速加工时间（<60 s）。本课题通过设计和搭建实验室规模的玻璃微件注射成型实验装置，对玻璃微注射成型性能进行了系统的研究。化学耐久性，低Tg磷酸盐玻璃的热机械性能将被调查，特别是在该地区的微注塑加工制度。基于μ-IMG装置，研究了模具材料和表面质量对玻璃熔体在微尺寸型腔中流动能力的影响。此外，还将探索新的微结构模具制造方法。为了实现微玻璃制品注射成型过程的模拟，还需要建立描述微玻璃熔体流动行为的数学模型。最后，提出了微玻璃注射成型制品质量的检测和控制方法。光学性能、表面粗糙度、几何轮廓、尺寸精度、残余应力和机械性能将全面实施。

Relying on the good chemical and temperature stability of glasses, their optical properties and also its biocompatibility, sterilizing ability and the possibility to be cleaned easily, micro-structured parts are found and applied in many fields. However, the current micro glass parts producing technologies can not realize the mass low-cost production of micro glass parts (dimension <10-6 m2). So it’s necessary to introduce a new processing method to improve the cost-efficiency of micro glass parts fabrication and meanwhile keep the high precision (replication precision > 99%) and rapid processing time (< 60s). In this project, systematic investigations will be carried out to study the micro-injection moulding ability of glasses (μ-IMG) by designing and constructing a lab scale micro glass parts injection molding experimental device. The thermomechanical properties of chemical durable, low Tg phosphate glasses will be investigated especially in the area of the micro injection molding processing regime. Based on the μ-IMG equipment, the effect of mould material and surface quality on the flow ability of glass melts in micro dimensional cavity will be studied. In addition the new micro structure mould fabrication method will be explored as well. In order to realize the simulation of the micro glass parts injection molding process, the mathematical model describing the micro glass melt flowing behavior should be build up in addition. Finally, the accesses to test and control the quality of micro glass parts from injection molding is going to be made. Optical property, surface roughness, geometry profile, dimension precision, residual stress and mechanical properties will be implemented comprehensively.