摘要
研制了一种基于锥形螺杆挤出单元的桌面式熔融沉积成型(FDM)3D打印机,采用锥形螺杆塑化聚合物并挤出丝条,配合沉积平台的运动打印制品。使用聚乳酸(PLA)、高密度聚乙烯(PE-HD)材料对设备挤丝性能进行了研究,并研究了打印参数包括电机脉冲频率、走丝间距、层厚等对PLA拉伸样条性能的影响。结果表明,自制锥形螺杆挤出式FDM打印机具有较好的打印效果,合适的电机脉冲频率、走丝间距、层厚等工艺参数可以使打印制件获得较好的表观质量和强度,而较大的走丝间距使制件的拉伸强度下降了约20%。
In this paper, a desktop fused deposition modeling (FDM) 3D printer based on the conical screw extrusion unit was successfully developed. A conical screw was adopted to prepare the polymer melts and strips for the formation of 3D printed products by cooperating with the movement of printing platform. The extrusion performance of the printer was investigated by using PLA and PE-HD, and the effects of impulse frequency, filament spacing and layer thickness on the properties of PLA tensile specimen were investigated. The results indicated that the home-made FDM printer exhibited good printing performance, and suitable parameters can provide good apparent qualities and tensile properties for the printed parts. Nevertheless, the larger filament spacing reduced the tensile strength by about 20%.
作者
冷杰
许祥
陈宁
吴俊杰
王琪
张杰
LENG Jie;XU Xiang;CHENG Ning;WU Junjie;WANG Qi;ZHANG Jie(State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China;College of Polymer Science and Engineering,Sichuan University,Chengdu 610065,China;Polymer Research Institute,Sichuan University, Chengdu 610065,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2019年第1期48-52,共5页
China Plastics
基金
国家自然科学基金(51433006)
四川省科技计划项目(2017JY0069)
大连理工大学精密与特种加工教育部重点实验室开放课题(JMTZ201702)
关键词
熔融沉积成型
打印机
锥形螺杆
打印参数
fused deposition modeling
printer
conical screw
printing parameter
