基于熔融浸渍的3D打印用连续碳纤维预浸渍设备开发  

Development of Continuous Carbon Fiber Preimpregnation Equipment for 3D Printing Based on Melt Impregnation

作　　者：于颖[1] 徐惠良 王玉[2] Yu Ying;Xu Huiliang;Wang Yu(School of Mechanical Engineering,Tongji University,Shanghai 201804,China;Sino-German School of Applied Sciences,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]同济大学中德工程学院,上海201804

出　　处：《机电工程技术》2023年第4期37-40,167,共5页Mechanical & Electrical Engineering Technology

摘　　要：采用喷嘴内浸渍工艺的打印构件孔隙率高、力学性能差,且难以通过剪断续打实现选择性增强功能。为提高树脂与纤维之间的界面结合性能,开发一套基于熔融浸渍工艺的连续碳纤维预浸渍设备。利用该设备能够将打印性较差的碳纤维原丝制备成具有较高强度和韧性的连续碳纤维预浸丝,从而提高打印构件的力学性能。详细介绍预浸渍设备各部分的结构设计以及整个设备控制系统的搭建工作,并对利用该设备制得的碳纤维预浸丝进行拉伸试验,评估其力学性能;利用扫描电子显微镜观察预浸丝横截面的微观形貌。结果表明:经过预浸渍设备处理的碳纤维预浸丝的极限拉力达到130 N,与碳纤维原丝相比提高了83%;预浸丝内部大部分纤维单丝被基体树脂均匀包裹,有效减少了孔隙缺陷。The parts printed by using in-nozzle impregnation process have high porosity,poor mechanical properties,and it is difficult to achieve the selective reinforcement function through cutting and beating.In order to improve the interface bonding performance between resin and carbon fiber,a set of continuous carbon fiber preimpregnation equipment based on the melt impregnation process was developed.By using the equipment,carbon fiber tow with poor printability can be prepared into continuous carbon fiber prepreg filament with high strength and toughness,thus the mechanical properties of printing parts can be improved.The structural design of each part of the pre-impregnation equipment and the construction of the entire equipment control system were introduced in detail,and the mechanical properties of the prepared carbon fiber prepreg filament were evaluated through tensile test;the microscopic morphology of the cross-section of the filament was observed by using scanning electron microscope.The results show that the ultimate tensile force of the carbon fiber prepreg filament treated by the preimpregnation equipment reaches 130 N,which is 83%higher than that of the carbon fiber tow;according to the scanning electron microscope pictures,most of the fibers in the prepreg filament are uniformly wrapped by the matrix resin,the pore defects can be effectively reduced.

关 键 词：碳纤维 热塑性树脂 预浸丝 3D打印 

分 类 号：TH164[机械工程—机械制造及自动化]