熔融沉积成型与注塑成型聚乳酸产品力学性能对比  

Comparison of Mechanical Properties between the PLA Products Prepared by FDM and Injection Molding

作　　者：余旺旺[1,2,3] 何亮 栗娟[1] 王新洲[3] Yu Wangwang;He Liang;Li Juan;Wang Xinzhou(School of Mechanical Engineering,Nanjing Institute of Industry Technology,Nanjing 210023,China;Advanced Research Center for Polymer Processing Engineering of Guangdong Province,Guangdong Industry Technical Polytechnic,Guangzhou 510300,China;College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]南京工业职业技术学院机械工程学院,江苏南京210023 [2]广东省高分子材料先进加工工程技术研究中心广东轻工职业技术学院,广东广州510300 [3]南京林业大学材料科学与工程学院,江苏南京210037

出　　处：《塑料科技》2019年第12期56-59,共4页Plastics Science and Technology

基　　金：广东省高校高分子材料加工工程技术开发中心基金资助(201808);江苏省第五期“333”工程资助项目;江苏省高等学校自然科学研究项目(19KJB430025);南京工业职业技术学院人才引进科研启动基金(YK18-01-14)

摘　　要：通过挤出成型制备聚乳酸(PLA)线材,采用熔融沉积方法制备标准拉伸试样,对比熔融沉积成型(FDM)与注塑成型对PLA产品力学性能的影响。研究结果表明:PLA打印产品的拉伸强度较注塑成型下降了31.9%,然而其断裂伸长率相对提升了186%;3D打印产品结构对产品力学性能有一定影响,沉积丝的拉伸应变主要是由产品内部结构的弯曲变形引起的;打印线材的形状对拉伸形变和弯曲形变几乎没影响。In this paper,plastic filament of polylactic acid(PLA)is made with extrusion molding and standard tensile specimens are prepared by fused deposition modeling(FDM).The effects of FDM and injection molding on the mechanical properties of PLA products are compared.The results show that the tensile strength of PLA printed products is 31.9%lower than that of injection molding,but its elongation at break is relatively increased by 186%.The 3D printing product structure has certain influence on the mechanical properties of the product.The tensile strain of the deposited filament is mainly caused by the bending deformation of the internal structure of the product.The shape of the printed filament has little effect on tensile deformation and bending deformation.

关 键 词：聚乳酸 3D打印 力学性能 熔融沉积成型 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]