Huang Zhiyuan, Liang Xiong, Chang Chuntao, Ma Jiang
College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, 518060, China.
School of Mechanical Engineering, Dongguan University of Technology, Dongguan, 523808, China.
Biomed Microdevices. 2019 Feb 6;21(1):13. doi: 10.1007/s10544-019-0366-0.
Micro components processed by injection molding still have a defect of bad precision and short life. A Zr- based metallic glass was reported for injection mold insert which can solve the problem well. The microstructure of metallic glass mold insert can be fabricated by wire electrical discharge machining-low speed (WEDM-LS), WEDM-LS has higher machining accuracy than WEDM-high speed, and X-ray diffraction curves show that the processed sample still retained better amorphous characteristic, afterward, time-temperature-transformation diagram shows metallic glass has a long service life in production. Finally, under the observe of scanning electron microscope, it is found that the products after injection molding not only completely replicates the structure on metallic glass but also have a better surface morphology. These experiments show that processing a sophisticated and durable Zr-based metallic glass mold by WEDM-LS is good for getting micro structure injection of polymers. It also provides a good mold material and machining method for injection industry.
通过注塑成型加工的微部件仍存在精度差和寿命短的缺陷。据报道，一种用于注塑模具镶件的锆基金属玻璃可以很好地解决这个问题。金属玻璃模具镶件的微观结构可以通过低速电火花线切割加工（WEDM-LS）来制造，WEDM-LS比高速电火花线切割加工具有更高的加工精度，并且X射线衍射曲线表明加工后的样品仍保留较好的非晶特性，之后，时间-温度转变图表明金属玻璃在生产中具有较长的使用寿命。最后，在扫描电子显微镜观察下发现，注塑成型后的产品不仅完全复制了金属玻璃上的结构，而且具有更好的表面形貌。这些实验表明，通过WEDM-LS加工复杂耐用的锆基金属玻璃模具有利于获得聚合物的微结构注塑件。它也为注塑行业提供了一种良好的模具材料和加工方法。
