基于聚乳酸的单螺杆挤出设备传质过程仿真分析  

Simulation and Analysis of Mass Transfer Process of the Single Screw Extrusion Equipment Based on Polylactic Acid

作　　者：李康 秦鹏 孙硕 叶伊壮 靳国宝 唐健 LI Kang;QIN Peng;SUN Shuo;YE Yizhuang;JIN Guobao;TANG Jian(School of Mechanical Engineering,Chaohu University,Hefei 238024,China)

机构地区：[1]巢湖学院机械工程学院,安徽合肥238024

出　　处：《河南科技》2024年第12期40-45,共6页Henan Science and Technology

基　　金：安徽省省级大学生创新创业项目“基于聚乳酸的增韧改性材料挤出设备设计与搭建”(S202310380068);巢湖学院2020年度校级科研项目“基于SLM的316L不锈钢成型工艺与性能优化的研究”(XLY-202004);巢湖学院2020年度学科建设质量提升工程“微结构精密成型工程重点实验室”(KJ20zsys03)。

摘　　要：【目的】针对适用于小批量、个性化定制耗材的桌面级单螺杆挤出设备的传质问题进行研究。【方法】对聚乳酸颗粒料的传质过程进行合理假设和简化,使用ANSYS Workbench进行结构仿真分析,利用POLYFLOW对螺杆和料筒的压力场、速度场和温度场等进行仿真分析,采用Fluent进行喷嘴温度场和热压耦合的计算模拟。【结果】整体结构的最大形变量为0.31 mm,最大应力为6.415 MPa;螺杆和料筒内的颗粒料流速稳定,无回流和溢出的现象;喷嘴出入口的温差为1.1℃,对应形变量为0.048 mm。【结论】经过上述仿真分析可得出,该结构可以在保证刚性的前提下,实现聚乳酸颗粒料的连续均匀挤出,对桌面级单螺杆挤出设备的可行性提供了一定的理论支撑。[Purposes]This paper aims to study the mass transfer problem of desktop-level single-screw extrusion equipment suitable for small batch and personalized customized consumables.[Methods]Rea⁃sonable assumptions and simplification of the mass transfer process of polylactic acid granules were made,and ANSYS Workbench was used for the structural simulation and analysis,POLYFLOW was used for the simulation and analysis of the pressure field,velocity field and temperature field of the screw and barrel,and Fluent was used for the calculation and simulation of the temperature field of the nozzle and the thermo-pressure coupling.[Findings]The maximum deformation of the overall structure is 0.31 mm,and the maximum stress is 6.415 MPa;the flow rate of granular material in the screw and barrel is stable,without reflux or overflow;the temperature difference between the nozzle inlet and outlet is 1.1℃,and the corresponding deformation is 0.048 mm.[Conclusions]Through the above simulation analysis,it can be concluded that the structure can realize the continuous and uniform extrusion of polylactic acid granules under the premise of guaranteeing the rigidity,which provides some theoretical support for the feasibility of desktop-level single-screw extrusion equipment.

关 键 词：结构设计 3D打印 有限元仿真 线材挤出 PLA 

分 类 号：TH164[机械工程—机械制造及自动化]