摘要
针对传统熔融沉积成型技术(FDM)型3D打印机存在打印材料选择受限,普通螺杆挤出式3D打印机难以打印物性相差较大材料且清洁护理困难等缺陷。通过分析FDM型单螺杆挤出式3D打印机喷头结构快速拆卸及更换的实用性,设计出可针对不同物料进行螺杆和料筒快速拆卸变更以适应相应材料物性参数的新结构,可实现FDM型螺杆挤出式3D打印机对打印材料更广泛的兼容和更便捷的清洁护理。料筒温度是保证螺杆挤出机构稳定工作的关键参数,以熔融温度区间较大的丙烯腈-丁二烯-苯乙烯(ABS)塑料为研究对象,利用ANSYS Fluent软件对打印机喷头温度场进行了仿真分析,并利用隔热和散热两种方法对喷头结构进行了优化设计。结果表明,优化后的喷头结构熔融区域明确,适应材料物性参数,能够有效防止非加热区域温度过高以及物料过早开始熔融的现象,保证了打印机运行的安全性和稳定性。
In order to solve the problems that the traditional melt deposition molding technology(FDM)three dimensional(3D)printer remained a defect about limited selection of printing materials,the general screw extruder 3D printer had some difficulties of printing materials with large difference in physical properties and it was hard to be cleaned.A new structure was designed for rapid disassembly and change of screw and barrel according to differences of material physical parameters by analyzing the practicability of FDM single-screw extrusion 3D printer nozzle structure for rapid disassembly and replacement.FDM screw extruder 3D printer had become more widely compatible with printing materials and more convenient to be cleaned and cared.The temperature of the barrel was the key parameter to ensure the stable operation of the screw extruder mechanism.Taking acrylonitrile butadiene styrene(ABS)plastic with a large melting temperature range as the research object,the simulation analysis of the temperature field of the printer nozzle was carried out by using ANSYS Fluent software,and the optimal design of the nozzle structure was carried out by using the methods of heat insulation and heat dissipation.The results show that the melt zone of the optimized nozzle structure is clear and suitable for the material property parameters,which can effectively prevent the phenomenon of high temperature in the non-heating zone and premature melting of the material,and guarantee the safety and stability of the printer.
作者
任礼
白海清
贾仕奎
秦望
安熠蔚
鲍骏
REN Li;BAI Hai-qing;JIA Shi-kui;QIN Wang;AN Yi-wei;BAO Jun(College of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723001,China;Shaanxi Key Laboratory of Industrial Automation,Hanzhong 723001,China;College of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723001,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2020年第12期90-95,共6页
China Plastics Industry
基金
国家自然科学基金项目(51703121)
陕西理工大学研究生创新基金项目(SLGYCX2028)。
关键词
单螺杆挤出
粒料
3D打印
FLUENT
流固耦合分析
Single Screw Extruding
Aggregate
Three Dimensional Printing
Fluent
Fluid-solid Coupling Analysis
作者简介
任礼,男,1992年生,硕士研究生,研究方向为数字化制造技术。496006560@qq.com;通信作者:白海清,男,1970年生,教授,硕导,研究方向为数字化制造及装备研究和机电系统监测与控制技术。snutbret@live.com。
