摘要
喷管作为纳米石墨片喷射成型过程中核心部件,其结构设计合理与否对纳米石墨片喷射速度以及汇聚特性有重大影响。在微粉喷射成型圆形截面喷管结构的研究基础上,对其直管段进行了改进,以椭圆形变截面或矩形变截面代替原有的圆形截面,并采取数值模拟方法分析了上述三种喷管对于微粒喷射速度及其分布范围的影响,研究表明,椭圆形变截面打印喷管效果要明显好于矩形变截面和圆形截面喷管,最后通过实验研究验证了数值模拟结果的正确性。
As a key component in the process of nano-graphite flake injection molding, the nozzle design has a great influence on the injection rate and aggregation characteristics of nano-graphite flakes. In this paper, based on the structure of the micro-powder injection nozzle, the straight pipe section is improved. The elliptical cross section or rectangular section is used instead of the original circular section. The numerical simulation method is used to analyze the three kinds of nozzle, The restdts show that the effect of elliptical variable cross-section nozzle is better than that of rectangular variable cross-section and circular nozzle. Finally, the correctness of the numerical simulation results is verified by experimental study.
出处
《机械设计与制造》
北大核心
2017年第9期113-116,共4页
Machinery Design & Manufacture
基金
国家自然科学基金(51575313)
湖北省自然科学基金(2014CFB678)
湖北省教育厅自然科学研究计划项目(B2013173)
华中科技大学材料成型与模具技术国家重点实验室开放基金课题(P2015-11)
关键词
喷射成型
变截面喷管结构设计
数值模拟
实验验证
Injection Molding
Variable Cross-Section Nozzle Design
Numerical Simulation
Experimental Verification
