层间预熔温度对熔融沉积成型打印件力学性能的影响  

Effect of Interlayer Premelting Temperature on Mechanical Properties of Fused Deposition Molded Printed Parts

作　　者：徐子又 胡镔 邢泽华 杜纯 段献宝 陈蓉[3] 文艳伟 周华民[1] 单斌[1] Xu Ziyou;Hu Bin;Xing Zehua;Du Chun;Duan Xianbao;Chen Rong;Wen Yanwei;Zhou Huamin;Shan Bin(School of Materials Science and Engineering,Huazhong University of Science and Technology.Wuhan 430074,China;School of materials science and engineering,Wuhan Institute of Technology,Wuhan 430062,China;School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学材料科学与工程学院,湖北武汉430074 [2]武汉工程大学材料科学与工程学院,湖北武汉430062 [3]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《塑料科技》2019年第5期37-43,共7页Plastics Science and Technology

摘　　要：以聚乳酸(PLA)为原料,通过对喷头装置进行改装,探究打印过程中,打印层预熔温度对垂直打印件层间结合强度及力学性能的影响。结果表明:随着预熔温度的升高,垂直打印件的最大拉伸强度呈先提高后降低的趋势,预熔温度为80℃时拉伸强度达到最大值,其平均强度可达到水平打印件的89.1%;而在无预热条件下,垂直打印件的力学性能只有水平打印件的66.9%。此外,通过对比实验发现,该层间预熔方式在提升打印件的层间结合强度方面优于传统的热处理方式。Using polylactic acid(PLA)as raw material,the influence of pre-melting temperature of printing layer on interlaminar bonding strength and mechanical properties of vertical printing parts was investigated by refitting sprinkler device.The results showed that with the increase of pre-melting temperature,the maximum tensile strength of vertical printing parts increases first and then decreases.The maximum tensile strength of vertical printing parts reaches the maximum value when the pre-melting temperature is 80℃,and its average strength can reach 89.1% of horizontal printing parts.In the absence of preheating,the mechanical properties of vertical printing are only 66.9% of that of horizontal printing.In addition,through comparative experiments,it is found that the interlayer pre-melting method is superior to the traditional heat treatment method in improving the interlayer bonding strength of printed parts.

关 键 词：3D打印 熔融沉积成型 层间预熔温度 层间结合强度 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]