摘要
采用有限元分析的方法,以生物可降解聚合物聚乳酸(PLA)为成型材料,对ART18Z支架注射成型进行模拟分析,探究熔体温度、模具温度和注射压力对支架成型工艺的影响。数值结果表明,塑化阶段熔体温度的升高会提高支架的填充率;填充阶段支架的填充率随着模具温度和注射压力的升高而升高。在保证注射成型质量前提下,注射温度280℃、模具温度90℃和注射压力150MPa为合适的工艺参数。研究成果揭示了不同工艺参数对聚合物血管支架注射成型质量的影响,可为改善血管支架注射成型工艺优化提供指导。
In this paper,the method of finite element analysis is adopted,and the biodegradable polymer polylactic acid(PLA)is used as the injection molding material,simulation analysis of ART18Z bracket injection molding and explored the influence of melt temperature,mold temperature and injection pressure on the stent molding process.Numerical results show that the inerease of melt temperature in the plasticization stage can increase the flling rate of the stent;The filling rate of the stent in the filling stage increases with the increase of mold temperature and injection pressure.Under the premise of ensuring the quality of injection molding,injection temperature of 280℃,mould temperature of 90℃ and injection pressure of 150MPa are suitable process parameters.Research results reveal the influence of different parameters on the injection molding quality of polymer vascular stents,and can provide guidance for improving vascular stent injection molding process optimization.
作者
李红霞
赵英良
杨龙杰
王敏杰
赵丹阳
Li Hongxia;Zhao Yingliang;Yang Longjie;Wang Minjie;Zhao Danyang(School of Mechanical Engineering,Dalian University of Technology,Dalian,Liaoning 116024,CHN)
出处
《模具制造》
2021年第8期50-54,共5页
Die & Mould Manufacture
基金
国家自然科学基金(11502044,U1906233)
中央高校基本科研业务专项资金(DUT19ZD202)。
