单螺杆挤出金属/PVA复合物3D打印成型  

3D Printing Molding of Metal/PVA Composite by Single-Screw Extrusion

作　　者：夏国峰 张仕颖[1] 郝向阳 杜明见 XIA Guofeng;ZHANG Shiying;HAO Xiangyang;DU Mingian(College of Mechanical Engineering,Chongqing Three Gorges University,Chongqing 404100,China;Intelligent Manufacturing Leading Technology Chongqing University Engineering Research Center,Chongqing Three Gorges University,Chongqing 404100,China)

机构地区：[1]重庆三峡学院,机械工程学院,重庆404100 [2]重庆三峡学院,智能制造先导技术重庆市高校工程研究中心,重庆404100

出　　处：《塑料》2024年第3期99-103,130,共6页Plastics

基　　金：重庆市科学技术局自然科学基金(cstc2019jcyj-msxm1239);智能制造先导技术重庆市高校工程研究中心开放基金(ZNZZXDJS202002);重庆市教委科学技术研究项目(KJ1601001);重庆市轻合金材料与加工工程技术研究中心开放基金(GCZX201903)。

摘　　要：聚乙烯醇(PVA)具有易溶于水、粘接强度高等特性,常被用作为粘接剂。采用铜粉(Cu)与PVA为原料制备铜/PVA复合物浆料,基于自主搭建的单螺杆挤出金属3D打印平台进行3D打印成型工艺实验研究,探究了PVA含量对成型质量的影响,并且,采用单一变量法研究铜/PVA复合物浆料的挤出速度、打印速度和打印层高成型工艺参数对成型质量的影响,最后,研究不同打印层高下,素坯的拉伸强度变化,验证其有效性。结果表明,当铜粉与PVA质量比为11:1时,素坯的成型质量较好;得到最优3D打印成型工艺参数为铜/PVA复合物浆料的挤出速度为15.63 mm/s、打印速度为15 mm/s、打印层高为0.24 mm,实验证明了采用最优3D打印工艺参数的成型质量较好。Polyvinyl alcohol(PVA)was often used as a binder due to its water solubility and high bonding strength.Copper powder(Cu)and PVA were used as raw materials to prepare copper/PVA composite slurry,and then 3D printing molding process experimental research was carried out based on the independently built screw extrusion metal 3D printing platform.The effect of PVA content on molding quality was investigated,and the effect of extrusion speed,printing speed and printing layer height molding process parameters of copper/PVA compound paste on molding quality was studied by single variable method.Finally,the tensile strength variation of plain billets with different printing layer heights was investigated to verify its validity.Research findings that the best molding quality of plain billets when the mass ratio of copper powder to PVA was 11:1.The optimal 3D printing molding process parameters were obtained,the extrusion speed of copper/PVA compound paste was 15.63 mm/s,the printing speed was 15 mm/s,and the print layer height was 0.24 mm.Experimental verification found excellent molding quality using optimal 3D printing process parameters.

关 键 词：金属3D打印 单螺杆挤出 PVA含量 成型质量 打印工艺 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]